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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" | |
31 | ||
32 | #include "pimd.h" | |
33 | #include "pim_pim.h" | |
34 | #include "pim_str.h" | |
35 | #include "pim_time.h" | |
36 | #include "pim_iface.h" | |
37 | #include "pim_join.h" | |
38 | #include "pim_zlookup.h" | |
39 | #include "pim_upstream.h" | |
40 | #include "pim_ifchannel.h" | |
41 | #include "pim_neighbor.h" | |
42 | #include "pim_rpf.h" | |
43 | #include "pim_zebra.h" | |
44 | #include "pim_oil.h" | |
45 | #include "pim_macro.h" | |
8f5f5e91 | 46 | #include "pim_rp.h" |
f14248dd | 47 | #include "pim_br.h" |
627ed2a3 | 48 | #include "pim_register.h" |
12e41d03 DL |
49 | |
50 | static void join_timer_start(struct pim_upstream *up); | |
51 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up); | |
52 | ||
cfa91a87 DS |
53 | /* |
54 | * A (*,G) or a (*,*) is going away | |
55 | * remove the parent pointer from | |
56 | * those pointing at us | |
57 | */ | |
58 | static void | |
59 | pim_upstream_remove_children (struct pim_upstream *up) | |
60 | { | |
61 | struct listnode *ch_node; | |
62 | struct pim_upstream *child; | |
63 | ||
64 | // Basic sanity, (*,*) not currently supported | |
4ed0af70 DS |
65 | if ((up->sg.src.s_addr == INADDR_ANY) && |
66 | (up->sg.grp.s_addr == INADDR_ANY)) | |
cfa91a87 DS |
67 | return; |
68 | ||
69 | // Basic sanity (S,G) have no children | |
4ed0af70 DS |
70 | if ((up->sg.src.s_addr != INADDR_ANY) && |
71 | (up->sg.grp.s_addr != INADDR_ANY)) | |
cfa91a87 DS |
72 | return; |
73 | ||
74 | for (ALL_LIST_ELEMENTS_RO (qpim_upstream_list, ch_node, child)) | |
75 | { | |
76 | if (child->parent == up) | |
77 | child->parent = NULL; | |
78 | } | |
79 | } | |
80 | ||
81 | /* | |
82 | * A (*,G) or a (*,*) is being created | |
83 | * Find the children that would point | |
84 | * at us. | |
85 | */ | |
86 | static void | |
87 | pim_upstream_find_new_children (struct pim_upstream *up) | |
88 | { | |
89 | struct pim_upstream *child; | |
90 | struct listnode *ch_node; | |
91 | ||
4ed0af70 DS |
92 | if ((up->sg.src.s_addr != INADDR_ANY) && |
93 | (up->sg.grp.s_addr != INADDR_ANY)) | |
cfa91a87 DS |
94 | return; |
95 | ||
4ed0af70 DS |
96 | if ((up->sg.src.s_addr == INADDR_ANY) && |
97 | (up->sg.grp.s_addr == INADDR_ANY)) | |
cfa91a87 DS |
98 | return; |
99 | ||
100 | for (ALL_LIST_ELEMENTS_RO (qpim_upstream_list, ch_node, child)) | |
101 | { | |
4ed0af70 DS |
102 | if ((up->sg.grp.s_addr != INADDR_ANY) && |
103 | (child->sg.grp.s_addr == up->sg.grp.s_addr) && | |
cfa91a87 DS |
104 | (child != up)) |
105 | child->parent = up; | |
106 | } | |
107 | } | |
108 | ||
4d99418b DS |
109 | /* |
110 | * If we have a (*,*) || (S,*) there is no parent | |
111 | * If we have a (S,G), find the (*,G) | |
112 | * If we have a (*,G), find the (*,*) | |
113 | */ | |
114 | static struct pim_upstream * | |
4ed0af70 | 115 | pim_upstream_find_parent (struct prefix_sg *sg) |
4d99418b | 116 | { |
4ed0af70 | 117 | struct prefix_sg any = *sg; |
4d99418b DS |
118 | |
119 | // (*,*) || (S,*) | |
4ed0af70 DS |
120 | if (((sg->src.s_addr == INADDR_ANY) && |
121 | (sg->grp.s_addr == INADDR_ANY)) || | |
122 | ((sg->src.s_addr != INADDR_ANY) && | |
123 | (sg->grp.s_addr == INADDR_ANY))) | |
4d99418b DS |
124 | return NULL; |
125 | ||
126 | // (S,G) | |
4ed0af70 DS |
127 | if ((sg->src.s_addr != INADDR_ANY) && |
128 | (sg->grp.s_addr != INADDR_ANY)) | |
4d99418b | 129 | { |
4ed0af70 | 130 | any.src.s_addr = INADDR_ANY; |
4d99418b DS |
131 | return pim_upstream_find (&any); |
132 | } | |
133 | ||
134 | // (*,G) | |
4ed0af70 | 135 | any.grp.s_addr = INADDR_ANY; |
4d99418b DS |
136 | return pim_upstream_find (&any); |
137 | } | |
138 | ||
12e41d03 DL |
139 | void pim_upstream_free(struct pim_upstream *up) |
140 | { | |
141 | XFREE(MTYPE_PIM_UPSTREAM, up); | |
142 | } | |
143 | ||
144 | static void upstream_channel_oil_detach(struct pim_upstream *up) | |
145 | { | |
146 | if (up->channel_oil) { | |
147 | pim_channel_oil_del(up->channel_oil); | |
25a335e0 | 148 | up->channel_oil = NULL; |
12e41d03 DL |
149 | } |
150 | } | |
151 | ||
152 | void pim_upstream_delete(struct pim_upstream *up) | |
153 | { | |
154 | THREAD_OFF(up->t_join_timer); | |
f14248dd | 155 | THREAD_OFF(up->t_ka_timer); |
792f4d29 | 156 | THREAD_OFF(up->t_rs_timer); |
12e41d03 | 157 | |
cfa91a87 | 158 | pim_upstream_remove_children (up); |
7fe1f662 | 159 | pim_mroute_del (up->channel_oil); |
12e41d03 DL |
160 | upstream_channel_oil_detach(up); |
161 | ||
162 | /* | |
163 | notice that listnode_delete() can't be moved | |
164 | into pim_upstream_free() because the later is | |
165 | called by list_delete_all_node() | |
166 | */ | |
167 | listnode_delete(qpim_upstream_list, up); | |
168 | ||
169 | pim_upstream_free(up); | |
170 | } | |
171 | ||
56638739 DS |
172 | void |
173 | pim_upstream_send_join (struct pim_upstream *up) | |
12e41d03 | 174 | { |
12e41d03 | 175 | if (PIM_DEBUG_PIM_TRACE) { |
56638739 | 176 | char rpf_str[100]; |
56638739 | 177 | pim_inet4_dump("<rpf?>", up->rpf.rpf_addr, rpf_str, sizeof(rpf_str)); |
05e451f8 | 178 | zlog_debug ("%s: RPF'%s=%s(%s) for Interface %s", __PRETTY_FUNCTION__, |
c9802954 | 179 | pim_str_sg_dump (&up->sg), rpf_str, pim_upstream_state2str (up->join_state), |
56638739 | 180 | up->rpf.source_nexthop.interface->name); |
12e41d03 | 181 | if (PIM_INADDR_IS_ANY(up->rpf.rpf_addr)) { |
05e451f8 | 182 | zlog_debug("%s: can't send join upstream: RPF'%s=%s", |
56638739 | 183 | __PRETTY_FUNCTION__, |
05e451f8 | 184 | pim_str_sg_dump (&up->sg), rpf_str); |
12e41d03 DL |
185 | /* warning only */ |
186 | } | |
187 | } | |
56638739 | 188 | |
12e41d03 DL |
189 | /* send Join(S,G) to the current upstream neighbor */ |
190 | pim_joinprune_send(up->rpf.source_nexthop.interface, | |
191 | up->rpf.rpf_addr, | |
05e451f8 | 192 | &up->sg, |
12e41d03 DL |
193 | 1 /* join */); |
194 | } | |
195 | ||
196 | static int on_join_timer(struct thread *t) | |
197 | { | |
198 | struct pim_upstream *up; | |
199 | ||
200 | zassert(t); | |
201 | up = THREAD_ARG(t); | |
202 | zassert(up); | |
203 | ||
bb6e291f DS |
204 | up->t_join_timer = NULL; |
205 | ||
206 | /* | |
207 | * In the case of a HFR we will not ahve anyone to send this to. | |
208 | */ | |
209 | if (up->fhr) | |
210 | return 0; | |
211 | ||
eb345962 DS |
212 | /* |
213 | * Don't send the join if the outgoing interface is a loopback | |
214 | * But since this might change leave the join timer running | |
215 | */ | |
216 | if (!if_is_loopback (up->rpf.source_nexthop.interface)) | |
217 | pim_upstream_send_join (up); | |
12e41d03 | 218 | |
12e41d03 DL |
219 | join_timer_start(up); |
220 | ||
221 | return 0; | |
222 | } | |
223 | ||
224 | static void join_timer_start(struct pim_upstream *up) | |
225 | { | |
226 | if (PIM_DEBUG_PIM_EVENTS) { | |
05e451f8 | 227 | zlog_debug("%s: starting %d sec timer for upstream (S,G)=%s", |
12e41d03 DL |
228 | __PRETTY_FUNCTION__, |
229 | qpim_t_periodic, | |
05e451f8 | 230 | pim_str_sg_dump (&up->sg)); |
12e41d03 DL |
231 | } |
232 | ||
8e38a2cf | 233 | THREAD_OFF (up->t_join_timer); |
12e41d03 DL |
234 | THREAD_TIMER_ON(master, up->t_join_timer, |
235 | on_join_timer, | |
236 | up, qpim_t_periodic); | |
237 | } | |
238 | ||
239 | void pim_upstream_join_timer_restart(struct pim_upstream *up) | |
240 | { | |
241 | THREAD_OFF(up->t_join_timer); | |
242 | join_timer_start(up); | |
243 | } | |
244 | ||
245 | static void pim_upstream_join_timer_restart_msec(struct pim_upstream *up, | |
246 | int interval_msec) | |
247 | { | |
248 | if (PIM_DEBUG_PIM_EVENTS) { | |
05e451f8 | 249 | zlog_debug("%s: restarting %d msec timer for upstream (S,G)=%s", |
12e41d03 DL |
250 | __PRETTY_FUNCTION__, |
251 | interval_msec, | |
05e451f8 | 252 | pim_str_sg_dump (&up->sg)); |
12e41d03 DL |
253 | } |
254 | ||
255 | THREAD_OFF(up->t_join_timer); | |
256 | THREAD_TIMER_MSEC_ON(master, up->t_join_timer, | |
257 | on_join_timer, | |
258 | up, interval_msec); | |
259 | } | |
260 | ||
261 | void pim_upstream_join_suppress(struct pim_upstream *up, | |
262 | struct in_addr rpf_addr, | |
263 | int holdtime) | |
264 | { | |
265 | long t_joinsuppress_msec; | |
266 | long join_timer_remain_msec; | |
267 | ||
268 | t_joinsuppress_msec = MIN(pim_if_t_suppressed_msec(up->rpf.source_nexthop.interface), | |
269 | 1000 * holdtime); | |
270 | ||
271 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
272 | ||
273 | if (PIM_DEBUG_PIM_TRACE) { | |
12e41d03 | 274 | char rpf_str[100]; |
12e41d03 | 275 | pim_inet4_dump("<rpf?>", rpf_addr, rpf_str, sizeof(rpf_str)); |
05e451f8 | 276 | zlog_debug("%s %s: detected Join%s to RPF'(S,G)=%s: join_timer=%ld msec t_joinsuppress=%ld msec", |
12e41d03 | 277 | __FILE__, __PRETTY_FUNCTION__, |
05e451f8 | 278 | pim_str_sg_dump (&up->sg), |
12e41d03 DL |
279 | rpf_str, |
280 | join_timer_remain_msec, t_joinsuppress_msec); | |
281 | } | |
282 | ||
283 | if (join_timer_remain_msec < t_joinsuppress_msec) { | |
284 | if (PIM_DEBUG_PIM_TRACE) { | |
05e451f8 | 285 | zlog_debug("%s %s: suppressing Join(S,G)=%s for %ld msec", |
12e41d03 | 286 | __FILE__, __PRETTY_FUNCTION__, |
05e451f8 | 287 | pim_str_sg_dump (&up->sg), t_joinsuppress_msec); |
12e41d03 DL |
288 | } |
289 | ||
290 | pim_upstream_join_timer_restart_msec(up, t_joinsuppress_msec); | |
291 | } | |
292 | } | |
293 | ||
294 | void pim_upstream_join_timer_decrease_to_t_override(const char *debug_label, | |
295 | struct pim_upstream *up, | |
296 | struct in_addr rpf_addr) | |
297 | { | |
298 | long join_timer_remain_msec; | |
299 | int t_override_msec; | |
300 | ||
301 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
302 | t_override_msec = pim_if_t_override_msec(up->rpf.source_nexthop.interface); | |
303 | ||
304 | if (PIM_DEBUG_PIM_TRACE) { | |
12e41d03 | 305 | char rpf_str[100]; |
12e41d03 | 306 | pim_inet4_dump("<rpf?>", rpf_addr, rpf_str, sizeof(rpf_str)); |
05e451f8 | 307 | zlog_debug("%s: to RPF'%s=%s: join_timer=%ld msec t_override=%d msec", |
12e41d03 | 308 | debug_label, |
05e451f8 | 309 | pim_str_sg_dump (&up->sg), rpf_str, |
12e41d03 DL |
310 | join_timer_remain_msec, t_override_msec); |
311 | } | |
312 | ||
313 | if (join_timer_remain_msec > t_override_msec) { | |
314 | if (PIM_DEBUG_PIM_TRACE) { | |
05e451f8 | 315 | zlog_debug("%s: decreasing (S,G)=%s join timer to t_override=%d msec", |
12e41d03 | 316 | debug_label, |
05e451f8 | 317 | pim_str_sg_dump (&up->sg), |
12e41d03 DL |
318 | t_override_msec); |
319 | } | |
320 | ||
321 | pim_upstream_join_timer_restart_msec(up, t_override_msec); | |
322 | } | |
323 | } | |
324 | ||
325 | static void forward_on(struct pim_upstream *up) | |
326 | { | |
327 | struct listnode *ifnode; | |
328 | struct listnode *ifnextnode; | |
329 | struct listnode *chnode; | |
330 | struct listnode *chnextnode; | |
331 | struct interface *ifp; | |
332 | struct pim_interface *pim_ifp; | |
333 | struct pim_ifchannel *ch; | |
334 | ||
335 | /* scan all interfaces */ | |
469351b3 | 336 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
337 | pim_ifp = ifp->info; |
338 | if (!pim_ifp) | |
339 | continue; | |
340 | ||
341 | /* scan per-interface (S,G) state */ | |
342 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
343 | ||
344 | if (ch->upstream != up) | |
345 | continue; | |
346 | ||
347 | if (pim_macro_chisin_oiflist(ch)) | |
348 | pim_forward_start(ch); | |
349 | ||
350 | } /* scan iface channel list */ | |
351 | } /* scan iflist */ | |
352 | } | |
353 | ||
354 | static void forward_off(struct pim_upstream *up) | |
355 | { | |
356 | struct listnode *ifnode; | |
357 | struct listnode *ifnextnode; | |
358 | struct listnode *chnode; | |
359 | struct listnode *chnextnode; | |
360 | struct interface *ifp; | |
361 | struct pim_interface *pim_ifp; | |
362 | struct pim_ifchannel *ch; | |
363 | ||
364 | /* scan all interfaces */ | |
469351b3 | 365 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
366 | pim_ifp = ifp->info; |
367 | if (!pim_ifp) | |
368 | continue; | |
369 | ||
370 | /* scan per-interface (S,G) state */ | |
371 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
372 | ||
373 | if (ch->upstream != up) | |
374 | continue; | |
375 | ||
376 | pim_forward_stop(ch); | |
377 | ||
378 | } /* scan iface channel list */ | |
379 | } /* scan iflist */ | |
380 | } | |
381 | ||
bb6e291f DS |
382 | static int |
383 | pim_upstream_could_register (struct pim_upstream *up) | |
384 | { | |
385 | struct pim_interface *pim_ifp = up->rpf.source_nexthop.interface->info; | |
386 | ||
35917570 | 387 | if (pim_ifp && PIM_I_am_DR (pim_ifp) && |
bb6e291f DS |
388 | pim_if_connected_to_source (up->rpf.source_nexthop.interface, up->sg.src)) |
389 | return 1; | |
390 | ||
391 | return 0; | |
392 | } | |
393 | ||
7fcdfb34 DS |
394 | void |
395 | pim_upstream_switch(struct pim_upstream *up, | |
396 | enum pim_upstream_state new_state) | |
12e41d03 DL |
397 | { |
398 | enum pim_upstream_state old_state = up->join_state; | |
399 | ||
12e41d03 | 400 | if (PIM_DEBUG_PIM_EVENTS) { |
c9802954 | 401 | zlog_debug("%s: PIM_UPSTREAM_%s: (S,G) old: %s new: %s", |
12e41d03 | 402 | __PRETTY_FUNCTION__, |
c9802954 DS |
403 | pim_str_sg_dump (&up->sg), |
404 | pim_upstream_state2str (up->join_state), | |
405 | pim_upstream_state2str (new_state)); | |
12e41d03 DL |
406 | } |
407 | ||
bb027ee8 DS |
408 | /* |
409 | * This code still needs work. | |
410 | */ | |
411 | switch (up->join_state) | |
412 | { | |
413 | case PIM_UPSTREAM_PRUNE: | |
7747bad6 DS |
414 | if (!up->fhr) |
415 | { | |
416 | up->join_state = new_state; | |
417 | up->state_transition = pim_time_monotonic_sec (); | |
418 | } | |
419 | break; | |
bb027ee8 DS |
420 | case PIM_UPSTREAM_JOIN_PENDING: |
421 | break; | |
422 | case PIM_UPSTREAM_NOTJOINED: | |
423 | case PIM_UPSTREAM_JOINED: | |
424 | up->join_state = new_state; | |
425 | up->state_transition = pim_time_monotonic_sec(); | |
426 | ||
427 | break; | |
428 | } | |
429 | ||
12e41d03 DL |
430 | pim_upstream_update_assert_tracking_desired(up); |
431 | ||
432 | if (new_state == PIM_UPSTREAM_JOINED) { | |
81900c5a DS |
433 | if (old_state != PIM_UPSTREAM_JOINED) |
434 | { | |
bb6e291f | 435 | int old_fhr = up->fhr; |
81900c5a | 436 | forward_on(up); |
bb6e291f DS |
437 | up->fhr = pim_upstream_could_register (up); |
438 | if (up->fhr) | |
439 | { | |
440 | if (!old_fhr) | |
441 | { | |
442 | pim_upstream_keep_alive_timer_start (up, qpim_keep_alive_time); | |
443 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); | |
444 | } | |
445 | } | |
446 | else | |
447 | { | |
448 | pim_upstream_send_join (up); | |
449 | join_timer_start (up); | |
450 | } | |
81900c5a DS |
451 | } |
452 | else | |
453 | { | |
454 | forward_on (up); | |
455 | } | |
12e41d03 DL |
456 | } |
457 | else { | |
458 | forward_off(up); | |
459 | pim_joinprune_send(up->rpf.source_nexthop.interface, | |
460 | up->rpf.rpf_addr, | |
05e451f8 | 461 | &up->sg, |
12e41d03 | 462 | 0 /* prune */); |
7fcdfb34 DS |
463 | if (up->t_join_timer) |
464 | THREAD_OFF(up->t_join_timer); | |
12e41d03 | 465 | } |
12e41d03 DL |
466 | } |
467 | ||
4ed0af70 | 468 | static struct pim_upstream *pim_upstream_new(struct prefix_sg *sg, |
651d0f71 | 469 | struct interface *incoming) |
12e41d03 DL |
470 | { |
471 | struct pim_upstream *up; | |
2f702571 | 472 | enum pim_rpf_result rpf_result; |
12e41d03 | 473 | |
36d9e7dc | 474 | up = XCALLOC(MTYPE_PIM_UPSTREAM, sizeof(*up)); |
12e41d03 | 475 | if (!up) { |
36d9e7dc | 476 | zlog_err("%s: PIM XCALLOC(%zu) failure", |
12e41d03 | 477 | __PRETTY_FUNCTION__, sizeof(*up)); |
8f5f5e91 | 478 | return NULL; |
12e41d03 DL |
479 | } |
480 | ||
5074a423 | 481 | up->sg = *sg; |
36d6bd7d | 482 | if (!pim_rp_set_upstream_addr (&up->upstream_addr, sg->src, sg->grp)) |
8f5f5e91 DS |
483 | { |
484 | if (PIM_DEBUG_PIM_TRACE) | |
485 | zlog_debug("%s: Received a (*,G) with no RP configured", __PRETTY_FUNCTION__); | |
486 | ||
487 | XFREE (MTYPE_PIM_UPSTREAM, up); | |
488 | return NULL; | |
489 | } | |
490 | ||
4d99418b | 491 | up->parent = pim_upstream_find_parent (sg); |
cfa91a87 | 492 | pim_upstream_find_new_children (up); |
12e41d03 DL |
493 | up->flags = 0; |
494 | up->ref_count = 1; | |
4a4c4a07 DS |
495 | up->t_join_timer = NULL; |
496 | up->t_ka_timer = NULL; | |
792f4d29 | 497 | up->t_rs_timer = NULL; |
12e41d03 DL |
498 | up->join_state = 0; |
499 | up->state_transition = pim_time_monotonic_sec(); | |
4a4c4a07 | 500 | up->channel_oil = NULL; |
f9e0ab5b | 501 | up->sptbit = PIM_UPSTREAM_SPTBIT_FALSE; |
12e41d03 | 502 | |
f24405b1 | 503 | up->rpf.source_nexthop.interface = NULL; |
12e41d03 DL |
504 | up->rpf.source_nexthop.mrib_nexthop_addr.s_addr = PIM_NET_INADDR_ANY; |
505 | up->rpf.source_nexthop.mrib_metric_preference = qpim_infinite_assert_metric.metric_preference; | |
506 | up->rpf.source_nexthop.mrib_route_metric = qpim_infinite_assert_metric.route_metric; | |
507 | up->rpf.rpf_addr.s_addr = PIM_NET_INADDR_ANY; | |
508 | ||
d3dd1804 | 509 | rpf_result = pim_rpf_update(up, NULL); |
2f702571 DS |
510 | if (rpf_result == PIM_RPF_FAILURE) { |
511 | XFREE(MTYPE_PIM_UPSTREAM, up); | |
512 | return NULL; | |
513 | } | |
12e41d03 DL |
514 | |
515 | listnode_add(qpim_upstream_list, up); | |
516 | ||
517 | return up; | |
518 | } | |
519 | ||
6c629103 DS |
520 | /* |
521 | * For a given sg, find any non * source | |
522 | */ | |
4ed0af70 | 523 | struct pim_upstream *pim_upstream_find_non_any (struct prefix_sg *sg) |
6c629103 DS |
524 | { |
525 | struct listnode *up_node; | |
4ed0af70 | 526 | struct prefix_sg any = *sg; |
6c629103 DS |
527 | struct pim_upstream *up; |
528 | ||
4ed0af70 | 529 | any.src.s_addr = INADDR_ANY; |
6c629103 DS |
530 | |
531 | for (ALL_LIST_ELEMENTS_RO (qpim_upstream_list, up_node, up)) | |
532 | { | |
4ed0af70 DS |
533 | if ((any.grp.s_addr == up->sg.grp.s_addr) && |
534 | (up->sg.src.s_addr != any.src.s_addr)) | |
6c629103 DS |
535 | return up; |
536 | } | |
537 | ||
538 | return NULL; | |
539 | } | |
540 | ||
4ed0af70 | 541 | struct pim_upstream *pim_upstream_find(struct prefix_sg *sg) |
12e41d03 DL |
542 | { |
543 | struct listnode *up_node; | |
544 | struct pim_upstream *up; | |
545 | ||
546 | for (ALL_LIST_ELEMENTS_RO(qpim_upstream_list, up_node, up)) { | |
4ed0af70 DS |
547 | if ((sg->grp.s_addr == up->sg.grp.s_addr) && |
548 | (sg->src.s_addr == up->sg.src.s_addr)) | |
a3b58b4a | 549 | return up; |
12e41d03 DL |
550 | } |
551 | ||
d7259eac | 552 | return NULL; |
12e41d03 DL |
553 | } |
554 | ||
4ed0af70 | 555 | struct pim_upstream *pim_upstream_add(struct prefix_sg *sg, |
651d0f71 | 556 | struct interface *incoming) |
12e41d03 DL |
557 | { |
558 | struct pim_upstream *up; | |
559 | ||
5074a423 | 560 | up = pim_upstream_find(sg); |
12e41d03 DL |
561 | if (up) { |
562 | ++up->ref_count; | |
563 | } | |
564 | else { | |
5074a423 | 565 | up = pim_upstream_new(sg, incoming); |
12e41d03 DL |
566 | } |
567 | ||
568 | return up; | |
569 | } | |
570 | ||
571 | void pim_upstream_del(struct pim_upstream *up) | |
572 | { | |
573 | --up->ref_count; | |
574 | ||
575 | if (up->ref_count < 1) { | |
576 | pim_upstream_delete(up); | |
577 | } | |
578 | } | |
579 | ||
7a3ddda5 DS |
580 | static int |
581 | pim_upstream_evaluate_join_desired_interface (struct pim_upstream *up, | |
582 | struct pim_ifchannel *ch) | |
583 | { | |
584 | struct pim_upstream *parent = up->parent; | |
585 | ||
586 | if (ch->upstream == up) | |
587 | { | |
588 | if (!pim_macro_ch_lost_assert(ch) && pim_macro_chisin_joins_or_include(ch)) | |
589 | return 1; | |
590 | } | |
591 | /* | |
592 | * joins (*,G) | |
593 | */ | |
594 | if (parent && ch->upstream == parent) | |
595 | { | |
596 | if (!pim_macro_ch_lost_assert (ch) && pim_macro_chisin_joins_or_include (ch)) | |
597 | return 1; | |
598 | } | |
599 | ||
600 | return 0; | |
601 | } | |
602 | ||
12e41d03 DL |
603 | /* |
604 | Evaluate JoinDesired(S,G): | |
605 | ||
606 | JoinDesired(S,G) is true if there is a downstream (S,G) interface I | |
607 | in the set: | |
608 | ||
609 | inherited_olist(S,G) = | |
610 | joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
611 | ||
612 | JoinDesired(S,G) may be affected by changes in the following: | |
613 | ||
614 | pim_ifp->primary_address | |
615 | pim_ifp->pim_dr_addr | |
616 | ch->ifassert_winner_metric | |
617 | ch->ifassert_winner | |
618 | ch->local_ifmembership | |
619 | ch->ifjoin_state | |
620 | ch->upstream->rpf.source_nexthop.mrib_metric_preference | |
621 | ch->upstream->rpf.source_nexthop.mrib_route_metric | |
622 | ch->upstream->rpf.source_nexthop.interface | |
623 | ||
624 | See also pim_upstream_update_join_desired() below. | |
625 | */ | |
626 | int pim_upstream_evaluate_join_desired(struct pim_upstream *up) | |
627 | { | |
628 | struct listnode *ifnode; | |
629 | struct listnode *ifnextnode; | |
630 | struct listnode *chnode; | |
631 | struct listnode *chnextnode; | |
632 | struct interface *ifp; | |
633 | struct pim_interface *pim_ifp; | |
634 | struct pim_ifchannel *ch; | |
7a3ddda5 | 635 | int ret = 0; |
12e41d03 DL |
636 | |
637 | /* scan all interfaces */ | |
469351b3 | 638 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
639 | pim_ifp = ifp->info; |
640 | if (!pim_ifp) | |
641 | continue; | |
642 | ||
643 | /* scan per-interface (S,G) state */ | |
7a3ddda5 DS |
644 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) |
645 | { | |
646 | ret += pim_upstream_evaluate_join_desired_interface (up, ch); | |
647 | } /* scan iface channel list */ | |
12e41d03 DL |
648 | } /* scan iflist */ |
649 | ||
7a3ddda5 | 650 | return ret; /* false */ |
12e41d03 DL |
651 | } |
652 | ||
653 | /* | |
654 | See also pim_upstream_evaluate_join_desired() above. | |
655 | */ | |
656 | void pim_upstream_update_join_desired(struct pim_upstream *up) | |
657 | { | |
658 | int was_join_desired; /* boolean */ | |
659 | int is_join_desired; /* boolean */ | |
660 | ||
661 | was_join_desired = PIM_UPSTREAM_FLAG_TEST_DR_JOIN_DESIRED(up->flags); | |
662 | ||
663 | is_join_desired = pim_upstream_evaluate_join_desired(up); | |
664 | if (is_join_desired) | |
665 | PIM_UPSTREAM_FLAG_SET_DR_JOIN_DESIRED(up->flags); | |
666 | else | |
667 | PIM_UPSTREAM_FLAG_UNSET_DR_JOIN_DESIRED(up->flags); | |
668 | ||
669 | /* switched from false to true */ | |
670 | if (is_join_desired && !was_join_desired) { | |
12e41d03 DL |
671 | pim_upstream_switch(up, PIM_UPSTREAM_JOINED); |
672 | return; | |
673 | } | |
674 | ||
675 | /* switched from true to false */ | |
676 | if (!is_join_desired && was_join_desired) { | |
12e41d03 DL |
677 | pim_upstream_switch(up, PIM_UPSTREAM_NOTJOINED); |
678 | return; | |
679 | } | |
680 | } | |
681 | ||
682 | /* | |
683 | RFC 4601 4.5.7. Sending (S,G) Join/Prune Messages | |
684 | Transitions from Joined State | |
685 | RPF'(S,G) GenID changes | |
686 | ||
687 | The upstream (S,G) state machine remains in Joined state. If the | |
688 | Join Timer is set to expire in more than t_override seconds, reset | |
689 | it so that it expires after t_override seconds. | |
690 | */ | |
691 | void pim_upstream_rpf_genid_changed(struct in_addr neigh_addr) | |
692 | { | |
693 | struct listnode *up_node; | |
694 | struct listnode *up_nextnode; | |
695 | struct pim_upstream *up; | |
696 | ||
697 | /* | |
698 | Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr | |
699 | */ | |
700 | for (ALL_LIST_ELEMENTS(qpim_upstream_list, up_node, up_nextnode, up)) { | |
701 | ||
702 | if (PIM_DEBUG_PIM_TRACE) { | |
703 | char neigh_str[100]; | |
12e41d03 DL |
704 | char rpf_addr_str[100]; |
705 | pim_inet4_dump("<neigh?>", neigh_addr, neigh_str, sizeof(neigh_str)); | |
12e41d03 | 706 | pim_inet4_dump("<rpf?>", up->rpf.rpf_addr, rpf_addr_str, sizeof(rpf_addr_str)); |
05e451f8 | 707 | zlog_debug("%s: matching neigh=%s against upstream (S,G)=%s joined=%d rpf_addr=%s", |
12e41d03 | 708 | __PRETTY_FUNCTION__, |
05e451f8 | 709 | neigh_str, pim_str_sg_dump (&up->sg), |
12e41d03 DL |
710 | up->join_state == PIM_UPSTREAM_JOINED, |
711 | rpf_addr_str); | |
712 | } | |
713 | ||
714 | /* consider only (S,G) upstream in Joined state */ | |
715 | if (up->join_state != PIM_UPSTREAM_JOINED) | |
716 | continue; | |
717 | ||
718 | /* match RPF'(S,G)=neigh_addr */ | |
719 | if (up->rpf.rpf_addr.s_addr != neigh_addr.s_addr) | |
720 | continue; | |
721 | ||
722 | pim_upstream_join_timer_decrease_to_t_override("RPF'(S,G) GenID change", | |
723 | up, neigh_addr); | |
724 | } | |
725 | } | |
726 | ||
727 | ||
728 | void pim_upstream_rpf_interface_changed(struct pim_upstream *up, | |
729 | struct interface *old_rpf_ifp) | |
730 | { | |
731 | struct listnode *ifnode; | |
732 | struct listnode *ifnextnode; | |
733 | struct interface *ifp; | |
734 | ||
735 | /* scan all interfaces */ | |
469351b3 | 736 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
737 | struct listnode *chnode; |
738 | struct listnode *chnextnode; | |
739 | struct pim_ifchannel *ch; | |
740 | struct pim_interface *pim_ifp; | |
741 | ||
742 | pim_ifp = ifp->info; | |
743 | if (!pim_ifp) | |
744 | continue; | |
745 | ||
746 | /* search all ifchannels */ | |
747 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
748 | if (ch->upstream != up) | |
749 | continue; | |
750 | ||
751 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { | |
752 | if ( | |
753 | /* RPF_interface(S) was NOT I */ | |
754 | (old_rpf_ifp == ch->interface) | |
755 | && | |
756 | /* RPF_interface(S) stopped being I */ | |
757 | (ch->upstream->rpf.source_nexthop.interface != ch->interface) | |
758 | ) { | |
759 | assert_action_a5(ch); | |
760 | } | |
761 | } /* PIM_IFASSERT_I_AM_LOSER */ | |
762 | ||
763 | pim_ifchannel_update_assert_tracking_desired(ch); | |
764 | } | |
765 | } | |
766 | } | |
767 | ||
768 | void pim_upstream_update_could_assert(struct pim_upstream *up) | |
769 | { | |
770 | struct listnode *ifnode; | |
771 | struct listnode *ifnextnode; | |
772 | struct listnode *chnode; | |
773 | struct listnode *chnextnode; | |
774 | struct interface *ifp; | |
775 | struct pim_interface *pim_ifp; | |
776 | struct pim_ifchannel *ch; | |
777 | ||
778 | /* scan all interfaces */ | |
469351b3 | 779 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
780 | pim_ifp = ifp->info; |
781 | if (!pim_ifp) | |
782 | continue; | |
783 | ||
784 | /* scan per-interface (S,G) state */ | |
785 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
786 | ||
787 | if (ch->upstream != up) | |
788 | continue; | |
789 | ||
790 | pim_ifchannel_update_could_assert(ch); | |
791 | ||
792 | } /* scan iface channel list */ | |
793 | } /* scan iflist */ | |
794 | } | |
795 | ||
796 | void pim_upstream_update_my_assert_metric(struct pim_upstream *up) | |
797 | { | |
798 | struct listnode *ifnode; | |
799 | struct listnode *ifnextnode; | |
800 | struct listnode *chnode; | |
801 | struct listnode *chnextnode; | |
802 | struct interface *ifp; | |
803 | struct pim_interface *pim_ifp; | |
804 | struct pim_ifchannel *ch; | |
805 | ||
806 | /* scan all interfaces */ | |
469351b3 | 807 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
808 | pim_ifp = ifp->info; |
809 | if (!pim_ifp) | |
810 | continue; | |
811 | ||
812 | /* scan per-interface (S,G) state */ | |
813 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
814 | ||
815 | if (ch->upstream != up) | |
816 | continue; | |
817 | ||
818 | pim_ifchannel_update_my_assert_metric(ch); | |
819 | ||
820 | } /* scan iface channel list */ | |
821 | } /* scan iflist */ | |
822 | } | |
823 | ||
824 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up) | |
825 | { | |
826 | struct listnode *ifnode; | |
827 | struct listnode *ifnextnode; | |
828 | struct listnode *chnode; | |
829 | struct listnode *chnextnode; | |
830 | struct interface *ifp; | |
831 | struct pim_interface *pim_ifp; | |
832 | struct pim_ifchannel *ch; | |
833 | ||
834 | /* scan all interfaces */ | |
469351b3 | 835 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
836 | pim_ifp = ifp->info; |
837 | if (!pim_ifp) | |
838 | continue; | |
839 | ||
840 | /* scan per-interface (S,G) state */ | |
841 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
842 | ||
843 | if (ch->upstream != up) | |
844 | continue; | |
845 | ||
846 | pim_ifchannel_update_assert_tracking_desired(ch); | |
847 | ||
848 | } /* scan iface channel list */ | |
849 | } /* scan iflist */ | |
850 | } | |
f14248dd DS |
851 | |
852 | /* | |
853 | * On an RP, the PMBR value must be cleared when the | |
854 | * Keepalive Timer expires | |
855 | */ | |
856 | static int | |
857 | pim_upstream_keep_alive_timer (struct thread *t) | |
858 | { | |
859 | struct pim_upstream *up; | |
860 | ||
861 | up = THREAD_ARG(t); | |
862 | ||
4ed0af70 | 863 | if (I_am_RP (up->sg.grp)) |
25a335e0 | 864 | { |
65e1fcd7 | 865 | pim_br_clear_pmbr (&up->sg); |
25a335e0 DS |
866 | /* |
867 | * We need to do more here :) | |
868 | * But this is the start. | |
869 | */ | |
870 | } | |
14315ea8 DS |
871 | |
872 | pim_mroute_update_counters (up->channel_oil); | |
873 | ||
e3be0432 DS |
874 | if ((up->channel_oil->cc.oldpktcnt >= up->channel_oil->cc.pktcnt) && |
875 | (up->channel_oil->cc.oldlastused >= up->channel_oil->cc.lastused)) | |
14315ea8 DS |
876 | { |
877 | pim_mroute_del (up->channel_oil); | |
d854589a DS |
878 | THREAD_OFF (up->t_ka_timer); |
879 | THREAD_OFF (up->t_rs_timer); | |
880 | THREAD_OFF (up->t_join_timer); | |
881 | pim_joinprune_send (up->rpf.source_nexthop.interface, up->rpf.rpf_addr, | |
882 | &up->sg, 0); | |
30df5c10 | 883 | pim_upstream_del (up); |
14315ea8 | 884 | } |
25a335e0 DS |
885 | else |
886 | { | |
14315ea8 | 887 | up->t_ka_timer = NULL; |
4304f95c | 888 | pim_upstream_keep_alive_timer_start (up, qpim_keep_alive_time); |
25a335e0 | 889 | } |
14315ea8 | 890 | |
cb40b272 | 891 | return 1; |
f14248dd DS |
892 | } |
893 | ||
f14248dd DS |
894 | void |
895 | pim_upstream_keep_alive_timer_start (struct pim_upstream *up, | |
896 | uint32_t time) | |
897 | { | |
00d2f9e4 | 898 | THREAD_OFF (up->t_ka_timer); |
f14248dd DS |
899 | THREAD_TIMER_ON (master, |
900 | up->t_ka_timer, | |
901 | pim_upstream_keep_alive_timer, | |
902 | up, time); | |
903 | } | |
cb40b272 DS |
904 | |
905 | /* | |
906 | * 4.2.1 Last-Hop Switchover to the SPT | |
907 | * | |
908 | * In Sparse-Mode PIM, last-hop routers join the shared tree towards the | |
909 | * RP. Once traffic from sources to joined groups arrives at a last-hop | |
910 | * router, it has the option of switching to receive the traffic on a | |
911 | * shortest path tree (SPT). | |
912 | * | |
913 | * The decision for a router to switch to the SPT is controlled as | |
914 | * follows: | |
915 | * | |
916 | * void | |
917 | * CheckSwitchToSpt(S,G) { | |
918 | * if ( ( pim_include(*,G) (-) pim_exclude(S,G) | |
919 | * (+) pim_include(S,G) != NULL ) | |
920 | * AND SwitchToSptDesired(S,G) ) { | |
921 | * # Note: Restarting the KAT will result in the SPT switch | |
922 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
923 | * } | |
924 | * } | |
925 | * | |
926 | * SwitchToSptDesired(S,G) is a policy function that is implementation | |
927 | * defined. An "infinite threshold" policy can be implemented by making | |
928 | * SwitchToSptDesired(S,G) return false all the time. A "switch on | |
929 | * first packet" policy can be implemented by making | |
930 | * SwitchToSptDesired(S,G) return true once a single packet has been | |
931 | * received for the source and group. | |
932 | */ | |
933 | int | |
4ed0af70 | 934 | pim_upstream_switch_to_spt_desired (struct prefix_sg *sg) |
cb40b272 | 935 | { |
4ed0af70 | 936 | if (I_am_RP (sg->grp)) |
a3b58b4a DS |
937 | return 1; |
938 | ||
cb40b272 DS |
939 | return 0; |
940 | } | |
d7259eac DS |
941 | |
942 | const char * | |
c9802954 | 943 | pim_upstream_state2str (enum pim_upstream_state join_state) |
d7259eac | 944 | { |
c9802954 | 945 | switch (join_state) |
d7259eac DS |
946 | { |
947 | case PIM_UPSTREAM_NOTJOINED: | |
948 | return "NtJnd"; | |
949 | break; | |
950 | case PIM_UPSTREAM_JOINED: | |
951 | return "Jnd"; | |
952 | break; | |
953 | case PIM_UPSTREAM_JOIN_PENDING: | |
954 | return "JPend"; | |
955 | break; | |
956 | case PIM_UPSTREAM_PRUNE: | |
957 | return "Prune"; | |
958 | break; | |
959 | } | |
960 | return "Unkwn"; | |
961 | } | |
627ed2a3 DS |
962 | |
963 | static int | |
964 | pim_upstream_register_stop_timer (struct thread *t) | |
965 | { | |
4df01a4e | 966 | struct pim_interface *pim_ifp; |
627ed2a3 DS |
967 | struct pim_upstream *up; |
968 | struct pim_rpf *rpg; | |
969 | struct ip ip_hdr; | |
627ed2a3 DS |
970 | up = THREAD_ARG (t); |
971 | ||
79ce47c0 | 972 | THREAD_TIMER_OFF (up->t_rs_timer); |
627ed2a3 DS |
973 | up->t_rs_timer = NULL; |
974 | ||
975 | if (PIM_DEBUG_TRACE) | |
976 | { | |
d5ed8a9c DS |
977 | zlog_debug ("%s: (S,G)=%s upstream register stop timer %s", |
978 | __PRETTY_FUNCTION__, pim_str_sg_dump (&up->sg), | |
c9802954 | 979 | pim_upstream_state2str(up->join_state)); |
627ed2a3 DS |
980 | } |
981 | ||
982 | switch (up->join_state) | |
983 | { | |
984 | case PIM_UPSTREAM_JOIN_PENDING: | |
985 | up->join_state = PIM_UPSTREAM_JOINED; | |
bb027ee8 DS |
986 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); |
987 | break; | |
988 | case PIM_UPSTREAM_JOINED: | |
627ed2a3 DS |
989 | break; |
990 | case PIM_UPSTREAM_PRUNE: | |
4df01a4e | 991 | pim_ifp = up->rpf.source_nexthop.interface->info; |
627ed2a3 DS |
992 | up->join_state = PIM_UPSTREAM_JOIN_PENDING; |
993 | pim_upstream_start_register_stop_timer (up, 1); | |
994 | ||
4ed0af70 | 995 | rpg = RP (up->sg.grp); |
627ed2a3 DS |
996 | memset (&ip_hdr, 0, sizeof (struct ip)); |
997 | ip_hdr.ip_p = PIM_IP_PROTO_PIM; | |
998 | ip_hdr.ip_hl = 5; | |
999 | ip_hdr.ip_v = 4; | |
4ed0af70 DS |
1000 | ip_hdr.ip_src = up->sg.src; |
1001 | ip_hdr.ip_dst = up->sg.grp; | |
dc686f82 | 1002 | ip_hdr.ip_len = htons (20); |
627ed2a3 | 1003 | // checksum is broken |
4df01a4e DS |
1004 | pim_register_send ((uint8_t *)&ip_hdr, sizeof (struct ip), |
1005 | pim_ifp->primary_address, rpg, 1); | |
627ed2a3 DS |
1006 | break; |
1007 | default: | |
1008 | break; | |
1009 | } | |
1010 | ||
1011 | return 0; | |
1012 | } | |
1013 | ||
1014 | void | |
1015 | pim_upstream_start_register_stop_timer (struct pim_upstream *up, int null_register) | |
1016 | { | |
1017 | uint32_t time; | |
1018 | ||
1019 | if (up->t_rs_timer) | |
1020 | { | |
1021 | THREAD_TIMER_OFF (up->t_rs_timer); | |
1022 | up->t_rs_timer = NULL; | |
1023 | } | |
1024 | ||
1025 | if (!null_register) | |
1026 | { | |
1027 | uint32_t lower = (0.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1028 | uint32_t upper = (1.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1029 | time = lower + (random () % (upper - lower + 1)) - PIM_REGISTER_PROBE_PERIOD; | |
1030 | } | |
1031 | else | |
1032 | time = PIM_REGISTER_PROBE_PERIOD; | |
1033 | ||
1034 | if (PIM_DEBUG_TRACE) | |
1035 | { | |
05e451f8 DS |
1036 | zlog_debug ("%s: (S,G)=%s Starting upstream register stop timer %d", |
1037 | __PRETTY_FUNCTION__, pim_str_sg_dump (&up->sg), time); | |
627ed2a3 DS |
1038 | } |
1039 | THREAD_TIMER_ON (master, up->t_rs_timer, | |
1040 | pim_upstream_register_stop_timer, | |
1041 | up, time); | |
1042 | } | |
4fdc8f36 DS |
1043 | |
1044 | /* | |
1045 | * For a given upstream, determine the inherited_olist | |
1046 | * and apply it. | |
219e0013 DS |
1047 | * |
1048 | * inherited_olist(S,G,rpt) = | |
1049 | * ( joins(*,*,RP(G)) (+) joins(*,G) (-) prunes(S,G,rpt) ) | |
1050 | * (+) ( pim_include(*,G) (-) pim_exclude(S,G)) | |
1051 | * (-) ( lost_assert(*,G) (+) lost_assert(S,G,rpt) ) | |
1052 | * | |
1053 | * inherited_olist(S,G) = | |
1054 | * inherited_olist(S,G,rpt) (+) | |
1055 | * joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
1056 | * | |
4fdc8f36 DS |
1057 | * return 1 if there are any output interfaces |
1058 | * return 0 if there are not any output interfaces | |
1059 | */ | |
1060 | int | |
1061 | pim_upstream_inherited_olist (struct pim_upstream *up) | |
1062 | { | |
219e0013 DS |
1063 | struct pim_interface *pim_ifp; |
1064 | struct listnode *ifnextnode; | |
1065 | struct listnode *chnextnode; | |
1066 | struct pim_ifchannel *ch; | |
1067 | struct listnode *chnode; | |
1068 | struct listnode *ifnode; | |
1069 | struct interface *ifp; | |
219e0013 DS |
1070 | int output_intf = 0; |
1071 | ||
3667b0bc | 1072 | pim_ifp = up->rpf.source_nexthop.interface->info; |
da55afba | 1073 | if (pim_ifp && !up->channel_oil) |
3667b0bc | 1074 | up->channel_oil = pim_channel_oil_add (&up->sg, pim_ifp->mroute_vif_index); |
219e0013 | 1075 | |
7a3ddda5 | 1076 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) |
219e0013 | 1077 | { |
7a3ddda5 DS |
1078 | pim_ifp = ifp->info; |
1079 | if (!pim_ifp) | |
1080 | continue; | |
219e0013 | 1081 | |
7a3ddda5 DS |
1082 | for (ALL_LIST_ELEMENTS (pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) |
1083 | { | |
1084 | if (pim_upstream_evaluate_join_desired_interface (up, ch)) | |
219e0013 | 1085 | { |
7a3ddda5 DS |
1086 | pim_channel_add_oif (up->channel_oil, ifp, PIM_OIF_FLAG_PROTO_PIM); |
1087 | output_intf++; | |
219e0013 DS |
1088 | } |
1089 | } | |
1090 | } | |
1091 | ||
483eef9d DS |
1092 | /* |
1093 | * If we have output_intf switch state to Join and work like normal | |
1094 | * If we don't have an output_intf that means we are probably a | |
1095 | * switch on a stick so turn on forwarding to just accept the | |
1096 | * incoming packets so we don't bother the other stuff! | |
1097 | */ | |
1098 | if (output_intf) | |
1099 | pim_upstream_switch (up, PIM_UPSTREAM_JOINED); | |
1100 | else | |
1101 | forward_on (up); | |
219e0013 DS |
1102 | |
1103 | return output_intf; | |
4fdc8f36 | 1104 | } |
d3dd1804 DS |
1105 | |
1106 | /* | |
1107 | * When we have a new neighbor, | |
1108 | * find upstreams that don't have their rpf_addr | |
1109 | * set and see if the new neighbor allows | |
1110 | * the join to be sent | |
1111 | */ | |
1112 | void | |
1113 | pim_upstream_find_new_rpf (void) | |
1114 | { | |
1115 | struct listnode *up_node; | |
1116 | struct listnode *up_nextnode; | |
1117 | struct pim_upstream *up; | |
1118 | ||
1119 | /* | |
1120 | Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr | |
1121 | */ | |
1122 | for (ALL_LIST_ELEMENTS(qpim_upstream_list, up_node, up_nextnode, up)) | |
1123 | { | |
1124 | if (PIM_INADDR_IS_ANY(up->rpf.rpf_addr)) | |
1125 | { | |
1126 | if (PIM_DEBUG_PIM_TRACE) | |
1127 | zlog_debug ("Upstream %s without a path to send join, checking", | |
1128 | pim_str_sg_dump (&up->sg)); | |
1129 | pim_rpf_update (up, NULL); | |
1130 | } | |
1131 | } | |
1132 | } |