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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" | |
12e41d03 DL |
33 | |
34 | #include "pimd.h" | |
35 | #include "pim_pim.h" | |
36 | #include "pim_str.h" | |
37 | #include "pim_time.h" | |
38 | #include "pim_iface.h" | |
39 | #include "pim_join.h" | |
40 | #include "pim_zlookup.h" | |
41 | #include "pim_upstream.h" | |
42 | #include "pim_ifchannel.h" | |
43 | #include "pim_neighbor.h" | |
44 | #include "pim_rpf.h" | |
45 | #include "pim_zebra.h" | |
46 | #include "pim_oil.h" | |
47 | #include "pim_macro.h" | |
8f5f5e91 | 48 | #include "pim_rp.h" |
f14248dd | 49 | #include "pim_br.h" |
627ed2a3 | 50 | #include "pim_register.h" |
12e41d03 DL |
51 | |
52 | static void join_timer_start(struct pim_upstream *up); | |
53 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up); | |
54 | ||
cfa91a87 DS |
55 | /* |
56 | * A (*,G) or a (*,*) is going away | |
57 | * remove the parent pointer from | |
58 | * those pointing at us | |
59 | */ | |
60 | static void | |
61 | pim_upstream_remove_children (struct pim_upstream *up) | |
62 | { | |
63 | struct listnode *ch_node; | |
64 | struct pim_upstream *child; | |
65 | ||
66 | // Basic sanity, (*,*) not currently supported | |
4ed0af70 DS |
67 | if ((up->sg.src.s_addr == INADDR_ANY) && |
68 | (up->sg.grp.s_addr == INADDR_ANY)) | |
cfa91a87 DS |
69 | return; |
70 | ||
71 | // Basic sanity (S,G) have no children | |
4ed0af70 DS |
72 | if ((up->sg.src.s_addr != INADDR_ANY) && |
73 | (up->sg.grp.s_addr != INADDR_ANY)) | |
cfa91a87 DS |
74 | return; |
75 | ||
76 | for (ALL_LIST_ELEMENTS_RO (qpim_upstream_list, ch_node, child)) | |
77 | { | |
78 | if (child->parent == up) | |
79 | child->parent = NULL; | |
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 | ||
102 | for (ALL_LIST_ELEMENTS_RO (qpim_upstream_list, ch_node, child)) | |
103 | { | |
4ed0af70 DS |
104 | if ((up->sg.grp.s_addr != INADDR_ANY) && |
105 | (child->sg.grp.s_addr == up->sg.grp.s_addr) && | |
cfa91a87 DS |
106 | (child != up)) |
107 | child->parent = up; | |
108 | } | |
109 | } | |
110 | ||
4d99418b DS |
111 | /* |
112 | * If we have a (*,*) || (S,*) there is no parent | |
113 | * If we have a (S,G), find the (*,G) | |
114 | * If we have a (*,G), find the (*,*) | |
115 | */ | |
116 | static struct pim_upstream * | |
4ed0af70 | 117 | pim_upstream_find_parent (struct prefix_sg *sg) |
4d99418b | 118 | { |
4ed0af70 | 119 | struct prefix_sg any = *sg; |
4d99418b DS |
120 | |
121 | // (*,*) || (S,*) | |
4ed0af70 DS |
122 | if (((sg->src.s_addr == INADDR_ANY) && |
123 | (sg->grp.s_addr == INADDR_ANY)) || | |
124 | ((sg->src.s_addr != INADDR_ANY) && | |
125 | (sg->grp.s_addr == INADDR_ANY))) | |
4d99418b DS |
126 | return NULL; |
127 | ||
128 | // (S,G) | |
4ed0af70 DS |
129 | if ((sg->src.s_addr != INADDR_ANY) && |
130 | (sg->grp.s_addr != INADDR_ANY)) | |
4d99418b | 131 | { |
4ed0af70 | 132 | any.src.s_addr = INADDR_ANY; |
4d99418b DS |
133 | return pim_upstream_find (&any); |
134 | } | |
135 | ||
136 | // (*,G) | |
4ed0af70 | 137 | any.grp.s_addr = INADDR_ANY; |
4d99418b DS |
138 | return pim_upstream_find (&any); |
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 | ||
154 | void pim_upstream_delete(struct pim_upstream *up) | |
155 | { | |
156 | THREAD_OFF(up->t_join_timer); | |
f14248dd | 157 | THREAD_OFF(up->t_ka_timer); |
792f4d29 | 158 | THREAD_OFF(up->t_rs_timer); |
12e41d03 | 159 | |
cfa91a87 | 160 | pim_upstream_remove_children (up); |
7fe1f662 | 161 | pim_mroute_del (up->channel_oil); |
12e41d03 DL |
162 | upstream_channel_oil_detach(up); |
163 | ||
164 | /* | |
165 | notice that listnode_delete() can't be moved | |
166 | into pim_upstream_free() because the later is | |
167 | called by list_delete_all_node() | |
168 | */ | |
169 | listnode_delete(qpim_upstream_list, up); | |
170 | ||
171 | pim_upstream_free(up); | |
172 | } | |
173 | ||
56638739 DS |
174 | void |
175 | pim_upstream_send_join (struct pim_upstream *up) | |
12e41d03 | 176 | { |
12e41d03 | 177 | if (PIM_DEBUG_PIM_TRACE) { |
56638739 | 178 | char rpf_str[100]; |
63c59d0c | 179 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_str, sizeof(rpf_str)); |
05e451f8 | 180 | zlog_debug ("%s: RPF'%s=%s(%s) for Interface %s", __PRETTY_FUNCTION__, |
c9802954 | 181 | pim_str_sg_dump (&up->sg), rpf_str, pim_upstream_state2str (up->join_state), |
56638739 | 182 | up->rpf.source_nexthop.interface->name); |
63c59d0c | 183 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { |
05e451f8 | 184 | zlog_debug("%s: can't send join upstream: RPF'%s=%s", |
56638739 | 185 | __PRETTY_FUNCTION__, |
05e451f8 | 186 | pim_str_sg_dump (&up->sg), rpf_str); |
12e41d03 DL |
187 | /* warning only */ |
188 | } | |
189 | } | |
56638739 | 190 | |
12e41d03 DL |
191 | /* send Join(S,G) to the current upstream neighbor */ |
192 | pim_joinprune_send(up->rpf.source_nexthop.interface, | |
63c59d0c | 193 | up->rpf.rpf_addr.u.prefix4, |
05e451f8 | 194 | &up->sg, |
12e41d03 DL |
195 | 1 /* join */); |
196 | } | |
197 | ||
198 | static int on_join_timer(struct thread *t) | |
199 | { | |
200 | struct pim_upstream *up; | |
201 | ||
202 | zassert(t); | |
203 | up = THREAD_ARG(t); | |
204 | zassert(up); | |
205 | ||
bb6e291f DS |
206 | up->t_join_timer = NULL; |
207 | ||
208 | /* | |
209 | * In the case of a HFR we will not ahve anyone to send this to. | |
210 | */ | |
0bf27c5c | 211 | if (PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) |
bb6e291f DS |
212 | return 0; |
213 | ||
eb345962 DS |
214 | /* |
215 | * Don't send the join if the outgoing interface is a loopback | |
216 | * But since this might change leave the join timer running | |
217 | */ | |
218 | if (!if_is_loopback (up->rpf.source_nexthop.interface)) | |
219 | pim_upstream_send_join (up); | |
12e41d03 | 220 | |
12e41d03 DL |
221 | join_timer_start(up); |
222 | ||
223 | return 0; | |
224 | } | |
225 | ||
226 | static void join_timer_start(struct pim_upstream *up) | |
227 | { | |
228 | if (PIM_DEBUG_PIM_EVENTS) { | |
05e451f8 | 229 | zlog_debug("%s: starting %d sec timer for upstream (S,G)=%s", |
12e41d03 DL |
230 | __PRETTY_FUNCTION__, |
231 | qpim_t_periodic, | |
05e451f8 | 232 | pim_str_sg_dump (&up->sg)); |
12e41d03 DL |
233 | } |
234 | ||
8e38a2cf | 235 | THREAD_OFF (up->t_join_timer); |
12e41d03 DL |
236 | THREAD_TIMER_ON(master, up->t_join_timer, |
237 | on_join_timer, | |
238 | up, qpim_t_periodic); | |
239 | } | |
240 | ||
241 | void pim_upstream_join_timer_restart(struct pim_upstream *up) | |
242 | { | |
243 | THREAD_OFF(up->t_join_timer); | |
244 | join_timer_start(up); | |
245 | } | |
246 | ||
247 | static void pim_upstream_join_timer_restart_msec(struct pim_upstream *up, | |
248 | int interval_msec) | |
249 | { | |
250 | if (PIM_DEBUG_PIM_EVENTS) { | |
05e451f8 | 251 | zlog_debug("%s: restarting %d msec timer for upstream (S,G)=%s", |
12e41d03 DL |
252 | __PRETTY_FUNCTION__, |
253 | interval_msec, | |
05e451f8 | 254 | pim_str_sg_dump (&up->sg)); |
12e41d03 DL |
255 | } |
256 | ||
257 | THREAD_OFF(up->t_join_timer); | |
258 | THREAD_TIMER_MSEC_ON(master, up->t_join_timer, | |
259 | on_join_timer, | |
260 | up, interval_msec); | |
261 | } | |
262 | ||
263 | void pim_upstream_join_suppress(struct pim_upstream *up, | |
264 | struct in_addr rpf_addr, | |
265 | int holdtime) | |
266 | { | |
267 | long t_joinsuppress_msec; | |
268 | long join_timer_remain_msec; | |
269 | ||
270 | t_joinsuppress_msec = MIN(pim_if_t_suppressed_msec(up->rpf.source_nexthop.interface), | |
271 | 1000 * holdtime); | |
272 | ||
273 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
274 | ||
275 | if (PIM_DEBUG_PIM_TRACE) { | |
12e41d03 | 276 | char rpf_str[100]; |
12e41d03 | 277 | pim_inet4_dump("<rpf?>", rpf_addr, rpf_str, sizeof(rpf_str)); |
05e451f8 | 278 | zlog_debug("%s %s: detected Join%s to RPF'(S,G)=%s: join_timer=%ld msec t_joinsuppress=%ld msec", |
12e41d03 | 279 | __FILE__, __PRETTY_FUNCTION__, |
05e451f8 | 280 | pim_str_sg_dump (&up->sg), |
12e41d03 DL |
281 | rpf_str, |
282 | join_timer_remain_msec, t_joinsuppress_msec); | |
283 | } | |
284 | ||
285 | if (join_timer_remain_msec < t_joinsuppress_msec) { | |
286 | if (PIM_DEBUG_PIM_TRACE) { | |
05e451f8 | 287 | zlog_debug("%s %s: suppressing Join(S,G)=%s for %ld msec", |
12e41d03 | 288 | __FILE__, __PRETTY_FUNCTION__, |
05e451f8 | 289 | pim_str_sg_dump (&up->sg), t_joinsuppress_msec); |
12e41d03 DL |
290 | } |
291 | ||
292 | pim_upstream_join_timer_restart_msec(up, t_joinsuppress_msec); | |
293 | } | |
294 | } | |
295 | ||
296 | void pim_upstream_join_timer_decrease_to_t_override(const char *debug_label, | |
297 | struct pim_upstream *up, | |
298 | struct in_addr rpf_addr) | |
299 | { | |
300 | long join_timer_remain_msec; | |
301 | int t_override_msec; | |
302 | ||
303 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
304 | t_override_msec = pim_if_t_override_msec(up->rpf.source_nexthop.interface); | |
305 | ||
306 | if (PIM_DEBUG_PIM_TRACE) { | |
12e41d03 | 307 | char rpf_str[100]; |
12e41d03 | 308 | pim_inet4_dump("<rpf?>", rpf_addr, rpf_str, sizeof(rpf_str)); |
05e451f8 | 309 | zlog_debug("%s: to RPF'%s=%s: join_timer=%ld msec t_override=%d msec", |
12e41d03 | 310 | debug_label, |
05e451f8 | 311 | pim_str_sg_dump (&up->sg), rpf_str, |
12e41d03 DL |
312 | join_timer_remain_msec, t_override_msec); |
313 | } | |
314 | ||
315 | if (join_timer_remain_msec > t_override_msec) { | |
316 | if (PIM_DEBUG_PIM_TRACE) { | |
05e451f8 | 317 | zlog_debug("%s: decreasing (S,G)=%s join timer to t_override=%d msec", |
12e41d03 | 318 | debug_label, |
05e451f8 | 319 | pim_str_sg_dump (&up->sg), |
12e41d03 DL |
320 | t_override_msec); |
321 | } | |
322 | ||
323 | pim_upstream_join_timer_restart_msec(up, t_override_msec); | |
324 | } | |
325 | } | |
326 | ||
327 | static void forward_on(struct pim_upstream *up) | |
328 | { | |
329 | struct listnode *ifnode; | |
330 | struct listnode *ifnextnode; | |
331 | struct listnode *chnode; | |
332 | struct listnode *chnextnode; | |
333 | struct interface *ifp; | |
334 | struct pim_interface *pim_ifp; | |
335 | struct pim_ifchannel *ch; | |
336 | ||
337 | /* scan all interfaces */ | |
469351b3 | 338 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
339 | pim_ifp = ifp->info; |
340 | if (!pim_ifp) | |
341 | continue; | |
342 | ||
343 | /* scan per-interface (S,G) state */ | |
344 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
345 | ||
346 | if (ch->upstream != up) | |
347 | continue; | |
348 | ||
349 | if (pim_macro_chisin_oiflist(ch)) | |
350 | pim_forward_start(ch); | |
351 | ||
352 | } /* scan iface channel list */ | |
353 | } /* scan iflist */ | |
354 | } | |
355 | ||
356 | static void forward_off(struct pim_upstream *up) | |
357 | { | |
358 | struct listnode *ifnode; | |
359 | struct listnode *ifnextnode; | |
360 | struct listnode *chnode; | |
361 | struct listnode *chnextnode; | |
362 | struct interface *ifp; | |
363 | struct pim_interface *pim_ifp; | |
364 | struct pim_ifchannel *ch; | |
365 | ||
366 | /* scan all interfaces */ | |
469351b3 | 367 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
368 | pim_ifp = ifp->info; |
369 | if (!pim_ifp) | |
370 | continue; | |
371 | ||
372 | /* scan per-interface (S,G) state */ | |
373 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
374 | ||
375 | if (ch->upstream != up) | |
376 | continue; | |
377 | ||
378 | pim_forward_stop(ch); | |
379 | ||
380 | } /* scan iface channel list */ | |
381 | } /* scan iflist */ | |
382 | } | |
383 | ||
bb6e291f DS |
384 | static int |
385 | pim_upstream_could_register (struct pim_upstream *up) | |
386 | { | |
387 | struct pim_interface *pim_ifp = up->rpf.source_nexthop.interface->info; | |
388 | ||
35917570 | 389 | if (pim_ifp && PIM_I_am_DR (pim_ifp) && |
bb6e291f DS |
390 | pim_if_connected_to_source (up->rpf.source_nexthop.interface, up->sg.src)) |
391 | return 1; | |
392 | ||
393 | return 0; | |
394 | } | |
395 | ||
7fcdfb34 DS |
396 | void |
397 | pim_upstream_switch(struct pim_upstream *up, | |
398 | enum pim_upstream_state new_state) | |
12e41d03 DL |
399 | { |
400 | enum pim_upstream_state old_state = up->join_state; | |
401 | ||
12e41d03 | 402 | if (PIM_DEBUG_PIM_EVENTS) { |
c9802954 | 403 | zlog_debug("%s: PIM_UPSTREAM_%s: (S,G) old: %s new: %s", |
12e41d03 | 404 | __PRETTY_FUNCTION__, |
c9802954 DS |
405 | pim_str_sg_dump (&up->sg), |
406 | pim_upstream_state2str (up->join_state), | |
407 | pim_upstream_state2str (new_state)); | |
12e41d03 DL |
408 | } |
409 | ||
bb027ee8 DS |
410 | /* |
411 | * This code still needs work. | |
412 | */ | |
413 | switch (up->join_state) | |
414 | { | |
415 | case PIM_UPSTREAM_PRUNE: | |
0bf27c5c | 416 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) |
7747bad6 DS |
417 | { |
418 | up->join_state = new_state; | |
419 | up->state_transition = pim_time_monotonic_sec (); | |
420 | } | |
421 | break; | |
bb027ee8 DS |
422 | case PIM_UPSTREAM_JOIN_PENDING: |
423 | break; | |
424 | case PIM_UPSTREAM_NOTJOINED: | |
425 | case PIM_UPSTREAM_JOINED: | |
426 | up->join_state = new_state; | |
427 | up->state_transition = pim_time_monotonic_sec(); | |
428 | ||
429 | break; | |
430 | } | |
431 | ||
12e41d03 DL |
432 | pim_upstream_update_assert_tracking_desired(up); |
433 | ||
434 | if (new_state == PIM_UPSTREAM_JOINED) { | |
81900c5a DS |
435 | if (old_state != PIM_UPSTREAM_JOINED) |
436 | { | |
0bf27c5c | 437 | int old_fhr = PIM_UPSTREAM_FLAG_TEST_FHR(up->flags); |
81900c5a | 438 | forward_on(up); |
0bf27c5c | 439 | if (pim_upstream_could_register (up)) |
bb6e291f | 440 | { |
0bf27c5c | 441 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); |
a9b59879 | 442 | if (!old_fhr && PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) |
bb6e291f DS |
443 | { |
444 | pim_upstream_keep_alive_timer_start (up, qpim_keep_alive_time); | |
445 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); | |
446 | } | |
447 | } | |
448 | else | |
449 | { | |
450 | pim_upstream_send_join (up); | |
451 | join_timer_start (up); | |
452 | } | |
81900c5a DS |
453 | } |
454 | else | |
455 | { | |
456 | forward_on (up); | |
457 | } | |
12e41d03 DL |
458 | } |
459 | else { | |
460 | forward_off(up); | |
461 | pim_joinprune_send(up->rpf.source_nexthop.interface, | |
63c59d0c | 462 | up->rpf.rpf_addr.u.prefix4, |
05e451f8 | 463 | &up->sg, |
12e41d03 | 464 | 0 /* prune */); |
7fcdfb34 DS |
465 | if (up->t_join_timer) |
466 | THREAD_OFF(up->t_join_timer); | |
12e41d03 | 467 | } |
12e41d03 DL |
468 | } |
469 | ||
4ed0af70 | 470 | static struct pim_upstream *pim_upstream_new(struct prefix_sg *sg, |
4a40c37a DS |
471 | struct interface *incoming, |
472 | int flags) | |
12e41d03 DL |
473 | { |
474 | struct pim_upstream *up; | |
2f702571 | 475 | enum pim_rpf_result rpf_result; |
12e41d03 | 476 | |
36d9e7dc | 477 | up = XCALLOC(MTYPE_PIM_UPSTREAM, sizeof(*up)); |
12e41d03 | 478 | if (!up) { |
36d9e7dc | 479 | zlog_err("%s: PIM XCALLOC(%zu) failure", |
12e41d03 | 480 | __PRETTY_FUNCTION__, sizeof(*up)); |
8f5f5e91 | 481 | return NULL; |
12e41d03 DL |
482 | } |
483 | ||
5074a423 | 484 | up->sg = *sg; |
36d6bd7d | 485 | if (!pim_rp_set_upstream_addr (&up->upstream_addr, sg->src, sg->grp)) |
8f5f5e91 DS |
486 | { |
487 | if (PIM_DEBUG_PIM_TRACE) | |
488 | zlog_debug("%s: Received a (*,G) with no RP configured", __PRETTY_FUNCTION__); | |
489 | ||
490 | XFREE (MTYPE_PIM_UPSTREAM, up); | |
491 | return NULL; | |
492 | } | |
493 | ||
4d99418b | 494 | up->parent = pim_upstream_find_parent (sg); |
cfa91a87 | 495 | pim_upstream_find_new_children (up); |
4a40c37a | 496 | up->flags = flags; |
12e41d03 | 497 | up->ref_count = 1; |
4a4c4a07 DS |
498 | up->t_join_timer = NULL; |
499 | up->t_ka_timer = NULL; | |
792f4d29 | 500 | up->t_rs_timer = NULL; |
12e41d03 DL |
501 | up->join_state = 0; |
502 | up->state_transition = pim_time_monotonic_sec(); | |
4a4c4a07 | 503 | up->channel_oil = NULL; |
f9e0ab5b | 504 | up->sptbit = PIM_UPSTREAM_SPTBIT_FALSE; |
12e41d03 | 505 | |
f24405b1 | 506 | up->rpf.source_nexthop.interface = NULL; |
63c59d0c DS |
507 | up->rpf.source_nexthop.mrib_nexthop_addr.family = AF_INET; |
508 | up->rpf.source_nexthop.mrib_nexthop_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
12e41d03 DL |
509 | up->rpf.source_nexthop.mrib_metric_preference = qpim_infinite_assert_metric.metric_preference; |
510 | up->rpf.source_nexthop.mrib_route_metric = qpim_infinite_assert_metric.route_metric; | |
63c59d0c DS |
511 | up->rpf.rpf_addr.family = AF_INET; |
512 | up->rpf.rpf_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
12e41d03 | 513 | |
d3dd1804 | 514 | rpf_result = pim_rpf_update(up, NULL); |
2f702571 | 515 | if (rpf_result == PIM_RPF_FAILURE) { |
4a40c37a DS |
516 | if (PIM_DEBUG_PIM_TRACE) |
517 | zlog_debug ("%s: Attempting to create upstream(%s), Unable to RPF for source", __PRETTY_FUNCTION__, | |
518 | pim_str_sg_dump (&up->sg)); | |
2f702571 DS |
519 | XFREE(MTYPE_PIM_UPSTREAM, up); |
520 | return NULL; | |
521 | } | |
12e41d03 | 522 | |
0d4f730c | 523 | listnode_add_sort(qpim_upstream_list, up); |
12e41d03 DL |
524 | |
525 | return up; | |
526 | } | |
527 | ||
6c629103 DS |
528 | /* |
529 | * For a given sg, find any non * source | |
530 | */ | |
4ed0af70 | 531 | struct pim_upstream *pim_upstream_find_non_any (struct prefix_sg *sg) |
6c629103 DS |
532 | { |
533 | struct listnode *up_node; | |
4ed0af70 | 534 | struct prefix_sg any = *sg; |
6c629103 DS |
535 | struct pim_upstream *up; |
536 | ||
4ed0af70 | 537 | any.src.s_addr = INADDR_ANY; |
6c629103 DS |
538 | |
539 | for (ALL_LIST_ELEMENTS_RO (qpim_upstream_list, up_node, up)) | |
540 | { | |
4ed0af70 DS |
541 | if ((any.grp.s_addr == up->sg.grp.s_addr) && |
542 | (up->sg.src.s_addr != any.src.s_addr)) | |
6c629103 DS |
543 | return up; |
544 | } | |
545 | ||
546 | return NULL; | |
547 | } | |
548 | ||
4ed0af70 | 549 | struct pim_upstream *pim_upstream_find(struct prefix_sg *sg) |
12e41d03 DL |
550 | { |
551 | struct listnode *up_node; | |
552 | struct pim_upstream *up; | |
553 | ||
554 | for (ALL_LIST_ELEMENTS_RO(qpim_upstream_list, up_node, up)) { | |
4ed0af70 DS |
555 | if ((sg->grp.s_addr == up->sg.grp.s_addr) && |
556 | (sg->src.s_addr == up->sg.src.s_addr)) | |
a3b58b4a | 557 | return up; |
12e41d03 DL |
558 | } |
559 | ||
d7259eac | 560 | return NULL; |
12e41d03 DL |
561 | } |
562 | ||
4ed0af70 | 563 | struct pim_upstream *pim_upstream_add(struct prefix_sg *sg, |
4a40c37a DS |
564 | struct interface *incoming, |
565 | int flags) | |
12e41d03 DL |
566 | { |
567 | struct pim_upstream *up; | |
568 | ||
5074a423 | 569 | up = pim_upstream_find(sg); |
12e41d03 DL |
570 | if (up) { |
571 | ++up->ref_count; | |
16b72591 | 572 | up->flags |= flags; |
12e41d03 DL |
573 | } |
574 | else { | |
4a40c37a | 575 | up = pim_upstream_new(sg, incoming, flags); |
12e41d03 DL |
576 | } |
577 | ||
578 | return up; | |
579 | } | |
580 | ||
581 | void pim_upstream_del(struct pim_upstream *up) | |
582 | { | |
583 | --up->ref_count; | |
584 | ||
585 | if (up->ref_count < 1) { | |
586 | pim_upstream_delete(up); | |
587 | } | |
588 | } | |
589 | ||
7a3ddda5 DS |
590 | static int |
591 | pim_upstream_evaluate_join_desired_interface (struct pim_upstream *up, | |
592 | struct pim_ifchannel *ch) | |
593 | { | |
594 | struct pim_upstream *parent = up->parent; | |
595 | ||
596 | if (ch->upstream == up) | |
597 | { | |
598 | if (!pim_macro_ch_lost_assert(ch) && pim_macro_chisin_joins_or_include(ch)) | |
599 | return 1; | |
600 | } | |
601 | /* | |
602 | * joins (*,G) | |
603 | */ | |
604 | if (parent && ch->upstream == parent) | |
605 | { | |
606 | if (!pim_macro_ch_lost_assert (ch) && pim_macro_chisin_joins_or_include (ch)) | |
607 | return 1; | |
608 | } | |
609 | ||
610 | return 0; | |
611 | } | |
612 | ||
12e41d03 DL |
613 | /* |
614 | Evaluate JoinDesired(S,G): | |
615 | ||
616 | JoinDesired(S,G) is true if there is a downstream (S,G) interface I | |
617 | in the set: | |
618 | ||
619 | inherited_olist(S,G) = | |
620 | joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
621 | ||
622 | JoinDesired(S,G) may be affected by changes in the following: | |
623 | ||
624 | pim_ifp->primary_address | |
625 | pim_ifp->pim_dr_addr | |
626 | ch->ifassert_winner_metric | |
627 | ch->ifassert_winner | |
628 | ch->local_ifmembership | |
629 | ch->ifjoin_state | |
630 | ch->upstream->rpf.source_nexthop.mrib_metric_preference | |
631 | ch->upstream->rpf.source_nexthop.mrib_route_metric | |
632 | ch->upstream->rpf.source_nexthop.interface | |
633 | ||
634 | See also pim_upstream_update_join_desired() below. | |
635 | */ | |
636 | int pim_upstream_evaluate_join_desired(struct pim_upstream *up) | |
637 | { | |
638 | struct listnode *ifnode; | |
639 | struct listnode *ifnextnode; | |
640 | struct listnode *chnode; | |
641 | struct listnode *chnextnode; | |
642 | struct interface *ifp; | |
643 | struct pim_interface *pim_ifp; | |
644 | struct pim_ifchannel *ch; | |
7a3ddda5 | 645 | int ret = 0; |
12e41d03 DL |
646 | |
647 | /* scan all interfaces */ | |
469351b3 | 648 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
649 | pim_ifp = ifp->info; |
650 | if (!pim_ifp) | |
651 | continue; | |
652 | ||
653 | /* scan per-interface (S,G) state */ | |
7a3ddda5 DS |
654 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) |
655 | { | |
656 | ret += pim_upstream_evaluate_join_desired_interface (up, ch); | |
657 | } /* scan iface channel list */ | |
12e41d03 DL |
658 | } /* scan iflist */ |
659 | ||
7a3ddda5 | 660 | return ret; /* false */ |
12e41d03 DL |
661 | } |
662 | ||
663 | /* | |
664 | See also pim_upstream_evaluate_join_desired() above. | |
665 | */ | |
666 | void pim_upstream_update_join_desired(struct pim_upstream *up) | |
667 | { | |
668 | int was_join_desired; /* boolean */ | |
669 | int is_join_desired; /* boolean */ | |
670 | ||
671 | was_join_desired = PIM_UPSTREAM_FLAG_TEST_DR_JOIN_DESIRED(up->flags); | |
672 | ||
673 | is_join_desired = pim_upstream_evaluate_join_desired(up); | |
674 | if (is_join_desired) | |
675 | PIM_UPSTREAM_FLAG_SET_DR_JOIN_DESIRED(up->flags); | |
676 | else | |
677 | PIM_UPSTREAM_FLAG_UNSET_DR_JOIN_DESIRED(up->flags); | |
678 | ||
679 | /* switched from false to true */ | |
680 | if (is_join_desired && !was_join_desired) { | |
12e41d03 DL |
681 | pim_upstream_switch(up, PIM_UPSTREAM_JOINED); |
682 | return; | |
683 | } | |
684 | ||
685 | /* switched from true to false */ | |
686 | if (!is_join_desired && was_join_desired) { | |
12e41d03 DL |
687 | pim_upstream_switch(up, PIM_UPSTREAM_NOTJOINED); |
688 | return; | |
689 | } | |
690 | } | |
691 | ||
692 | /* | |
693 | RFC 4601 4.5.7. Sending (S,G) Join/Prune Messages | |
694 | Transitions from Joined State | |
695 | RPF'(S,G) GenID changes | |
696 | ||
697 | The upstream (S,G) state machine remains in Joined state. If the | |
698 | Join Timer is set to expire in more than t_override seconds, reset | |
699 | it so that it expires after t_override seconds. | |
700 | */ | |
701 | void pim_upstream_rpf_genid_changed(struct in_addr neigh_addr) | |
702 | { | |
703 | struct listnode *up_node; | |
704 | struct listnode *up_nextnode; | |
705 | struct pim_upstream *up; | |
706 | ||
707 | /* | |
708 | Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr | |
709 | */ | |
710 | for (ALL_LIST_ELEMENTS(qpim_upstream_list, up_node, up_nextnode, up)) { | |
711 | ||
712 | if (PIM_DEBUG_PIM_TRACE) { | |
713 | char neigh_str[100]; | |
12e41d03 DL |
714 | char rpf_addr_str[100]; |
715 | pim_inet4_dump("<neigh?>", neigh_addr, neigh_str, sizeof(neigh_str)); | |
63c59d0c | 716 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_addr_str, sizeof(rpf_addr_str)); |
05e451f8 | 717 | zlog_debug("%s: matching neigh=%s against upstream (S,G)=%s joined=%d rpf_addr=%s", |
12e41d03 | 718 | __PRETTY_FUNCTION__, |
05e451f8 | 719 | neigh_str, pim_str_sg_dump (&up->sg), |
12e41d03 DL |
720 | up->join_state == PIM_UPSTREAM_JOINED, |
721 | rpf_addr_str); | |
722 | } | |
723 | ||
724 | /* consider only (S,G) upstream in Joined state */ | |
725 | if (up->join_state != PIM_UPSTREAM_JOINED) | |
726 | continue; | |
727 | ||
728 | /* match RPF'(S,G)=neigh_addr */ | |
63c59d0c | 729 | if (up->rpf.rpf_addr.u.prefix4.s_addr != neigh_addr.s_addr) |
12e41d03 DL |
730 | continue; |
731 | ||
732 | pim_upstream_join_timer_decrease_to_t_override("RPF'(S,G) GenID change", | |
733 | up, neigh_addr); | |
734 | } | |
735 | } | |
736 | ||
737 | ||
738 | void pim_upstream_rpf_interface_changed(struct pim_upstream *up, | |
739 | struct interface *old_rpf_ifp) | |
740 | { | |
741 | struct listnode *ifnode; | |
742 | struct listnode *ifnextnode; | |
743 | struct interface *ifp; | |
744 | ||
745 | /* scan all interfaces */ | |
469351b3 | 746 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
747 | struct listnode *chnode; |
748 | struct listnode *chnextnode; | |
749 | struct pim_ifchannel *ch; | |
750 | struct pim_interface *pim_ifp; | |
751 | ||
752 | pim_ifp = ifp->info; | |
753 | if (!pim_ifp) | |
754 | continue; | |
755 | ||
756 | /* search all ifchannels */ | |
757 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
758 | if (ch->upstream != up) | |
759 | continue; | |
760 | ||
761 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { | |
762 | if ( | |
763 | /* RPF_interface(S) was NOT I */ | |
764 | (old_rpf_ifp == ch->interface) | |
765 | && | |
766 | /* RPF_interface(S) stopped being I */ | |
767 | (ch->upstream->rpf.source_nexthop.interface != ch->interface) | |
768 | ) { | |
769 | assert_action_a5(ch); | |
770 | } | |
771 | } /* PIM_IFASSERT_I_AM_LOSER */ | |
772 | ||
773 | pim_ifchannel_update_assert_tracking_desired(ch); | |
774 | } | |
775 | } | |
776 | } | |
777 | ||
778 | void pim_upstream_update_could_assert(struct pim_upstream *up) | |
779 | { | |
780 | struct listnode *ifnode; | |
781 | struct listnode *ifnextnode; | |
782 | struct listnode *chnode; | |
783 | struct listnode *chnextnode; | |
784 | struct interface *ifp; | |
785 | struct pim_interface *pim_ifp; | |
786 | struct pim_ifchannel *ch; | |
787 | ||
788 | /* scan all interfaces */ | |
469351b3 | 789 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
790 | pim_ifp = ifp->info; |
791 | if (!pim_ifp) | |
792 | continue; | |
793 | ||
794 | /* scan per-interface (S,G) state */ | |
795 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
796 | ||
797 | if (ch->upstream != up) | |
798 | continue; | |
799 | ||
800 | pim_ifchannel_update_could_assert(ch); | |
801 | ||
802 | } /* scan iface channel list */ | |
803 | } /* scan iflist */ | |
804 | } | |
805 | ||
806 | void pim_upstream_update_my_assert_metric(struct pim_upstream *up) | |
807 | { | |
808 | struct listnode *ifnode; | |
809 | struct listnode *ifnextnode; | |
810 | struct listnode *chnode; | |
811 | struct listnode *chnextnode; | |
812 | struct interface *ifp; | |
813 | struct pim_interface *pim_ifp; | |
814 | struct pim_ifchannel *ch; | |
815 | ||
816 | /* scan all interfaces */ | |
469351b3 | 817 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
818 | pim_ifp = ifp->info; |
819 | if (!pim_ifp) | |
820 | continue; | |
821 | ||
822 | /* scan per-interface (S,G) state */ | |
823 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
824 | ||
825 | if (ch->upstream != up) | |
826 | continue; | |
827 | ||
828 | pim_ifchannel_update_my_assert_metric(ch); | |
829 | ||
830 | } /* scan iface channel list */ | |
831 | } /* scan iflist */ | |
832 | } | |
833 | ||
834 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up) | |
835 | { | |
836 | struct listnode *ifnode; | |
837 | struct listnode *ifnextnode; | |
838 | struct listnode *chnode; | |
839 | struct listnode *chnextnode; | |
840 | struct interface *ifp; | |
841 | struct pim_interface *pim_ifp; | |
842 | struct pim_ifchannel *ch; | |
843 | ||
844 | /* scan all interfaces */ | |
469351b3 | 845 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) { |
12e41d03 DL |
846 | pim_ifp = ifp->info; |
847 | if (!pim_ifp) | |
848 | continue; | |
849 | ||
850 | /* scan per-interface (S,G) state */ | |
851 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) { | |
852 | ||
853 | if (ch->upstream != up) | |
854 | continue; | |
855 | ||
856 | pim_ifchannel_update_assert_tracking_desired(ch); | |
857 | ||
858 | } /* scan iface channel list */ | |
859 | } /* scan iflist */ | |
860 | } | |
f14248dd DS |
861 | |
862 | /* | |
863 | * On an RP, the PMBR value must be cleared when the | |
864 | * Keepalive Timer expires | |
865 | */ | |
866 | static int | |
867 | pim_upstream_keep_alive_timer (struct thread *t) | |
868 | { | |
869 | struct pim_upstream *up; | |
870 | ||
871 | up = THREAD_ARG(t); | |
872 | ||
4ed0af70 | 873 | if (I_am_RP (up->sg.grp)) |
25a335e0 | 874 | { |
65e1fcd7 | 875 | pim_br_clear_pmbr (&up->sg); |
25a335e0 DS |
876 | /* |
877 | * We need to do more here :) | |
878 | * But this is the start. | |
879 | */ | |
880 | } | |
14315ea8 DS |
881 | |
882 | pim_mroute_update_counters (up->channel_oil); | |
883 | ||
e3be0432 | 884 | if ((up->channel_oil->cc.oldpktcnt >= up->channel_oil->cc.pktcnt) && |
5f0336ed | 885 | (up->channel_oil->cc.lastused/100 >= qpim_keep_alive_time)) |
14315ea8 DS |
886 | { |
887 | pim_mroute_del (up->channel_oil); | |
d854589a DS |
888 | THREAD_OFF (up->t_ka_timer); |
889 | THREAD_OFF (up->t_rs_timer); | |
890 | THREAD_OFF (up->t_join_timer); | |
63c59d0c | 891 | pim_joinprune_send (up->rpf.source_nexthop.interface, up->rpf.rpf_addr.u.prefix4, |
d854589a | 892 | &up->sg, 0); |
a9b59879 | 893 | PIM_UPSTREAM_FLAG_UNSET_SRC_STREAM (up->flags); |
5ce79466 DS |
894 | if (PIM_UPSTREAM_FLAG_TEST_CREATED_BY_UPSTREAM(up->flags)) |
895 | pim_upstream_del (up); | |
14315ea8 | 896 | } |
25a335e0 DS |
897 | else |
898 | { | |
14315ea8 | 899 | up->t_ka_timer = NULL; |
4304f95c | 900 | pim_upstream_keep_alive_timer_start (up, qpim_keep_alive_time); |
25a335e0 | 901 | } |
14315ea8 | 902 | |
cb40b272 | 903 | return 1; |
f14248dd DS |
904 | } |
905 | ||
f14248dd DS |
906 | void |
907 | pim_upstream_keep_alive_timer_start (struct pim_upstream *up, | |
908 | uint32_t time) | |
909 | { | |
00d2f9e4 | 910 | THREAD_OFF (up->t_ka_timer); |
f14248dd DS |
911 | THREAD_TIMER_ON (master, |
912 | up->t_ka_timer, | |
913 | pim_upstream_keep_alive_timer, | |
914 | up, time); | |
915 | } | |
cb40b272 DS |
916 | |
917 | /* | |
918 | * 4.2.1 Last-Hop Switchover to the SPT | |
919 | * | |
920 | * In Sparse-Mode PIM, last-hop routers join the shared tree towards the | |
921 | * RP. Once traffic from sources to joined groups arrives at a last-hop | |
922 | * router, it has the option of switching to receive the traffic on a | |
923 | * shortest path tree (SPT). | |
924 | * | |
925 | * The decision for a router to switch to the SPT is controlled as | |
926 | * follows: | |
927 | * | |
928 | * void | |
929 | * CheckSwitchToSpt(S,G) { | |
930 | * if ( ( pim_include(*,G) (-) pim_exclude(S,G) | |
931 | * (+) pim_include(S,G) != NULL ) | |
932 | * AND SwitchToSptDesired(S,G) ) { | |
933 | * # Note: Restarting the KAT will result in the SPT switch | |
934 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
935 | * } | |
936 | * } | |
937 | * | |
938 | * SwitchToSptDesired(S,G) is a policy function that is implementation | |
939 | * defined. An "infinite threshold" policy can be implemented by making | |
940 | * SwitchToSptDesired(S,G) return false all the time. A "switch on | |
941 | * first packet" policy can be implemented by making | |
942 | * SwitchToSptDesired(S,G) return true once a single packet has been | |
943 | * received for the source and group. | |
944 | */ | |
945 | int | |
4ed0af70 | 946 | pim_upstream_switch_to_spt_desired (struct prefix_sg *sg) |
cb40b272 | 947 | { |
4ed0af70 | 948 | if (I_am_RP (sg->grp)) |
a3b58b4a DS |
949 | return 1; |
950 | ||
cb40b272 DS |
951 | return 0; |
952 | } | |
d7259eac DS |
953 | |
954 | const char * | |
c9802954 | 955 | pim_upstream_state2str (enum pim_upstream_state join_state) |
d7259eac | 956 | { |
c9802954 | 957 | switch (join_state) |
d7259eac DS |
958 | { |
959 | case PIM_UPSTREAM_NOTJOINED: | |
e775c0a4 | 960 | return "NotJoined"; |
d7259eac DS |
961 | break; |
962 | case PIM_UPSTREAM_JOINED: | |
e775c0a4 | 963 | return "Joined"; |
d7259eac DS |
964 | break; |
965 | case PIM_UPSTREAM_JOIN_PENDING: | |
e775c0a4 | 966 | return "JoinPending"; |
d7259eac DS |
967 | break; |
968 | case PIM_UPSTREAM_PRUNE: | |
969 | return "Prune"; | |
970 | break; | |
971 | } | |
e775c0a4 | 972 | return "Unknown"; |
d7259eac | 973 | } |
627ed2a3 DS |
974 | |
975 | static int | |
976 | pim_upstream_register_stop_timer (struct thread *t) | |
977 | { | |
4df01a4e | 978 | struct pim_interface *pim_ifp; |
627ed2a3 DS |
979 | struct pim_upstream *up; |
980 | struct pim_rpf *rpg; | |
981 | struct ip ip_hdr; | |
627ed2a3 DS |
982 | up = THREAD_ARG (t); |
983 | ||
79ce47c0 | 984 | THREAD_TIMER_OFF (up->t_rs_timer); |
627ed2a3 DS |
985 | up->t_rs_timer = NULL; |
986 | ||
987 | if (PIM_DEBUG_TRACE) | |
988 | { | |
d5ed8a9c DS |
989 | zlog_debug ("%s: (S,G)=%s upstream register stop timer %s", |
990 | __PRETTY_FUNCTION__, pim_str_sg_dump (&up->sg), | |
c9802954 | 991 | pim_upstream_state2str(up->join_state)); |
627ed2a3 DS |
992 | } |
993 | ||
994 | switch (up->join_state) | |
995 | { | |
996 | case PIM_UPSTREAM_JOIN_PENDING: | |
997 | up->join_state = PIM_UPSTREAM_JOINED; | |
bb027ee8 DS |
998 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); |
999 | break; | |
1000 | case PIM_UPSTREAM_JOINED: | |
627ed2a3 DS |
1001 | break; |
1002 | case PIM_UPSTREAM_PRUNE: | |
4df01a4e | 1003 | pim_ifp = up->rpf.source_nexthop.interface->info; |
7ef66046 DS |
1004 | if (!pim_ifp) |
1005 | { | |
1006 | if (PIM_DEBUG_TRACE) | |
1007 | zlog_debug ("%s: Interface: %s is not configured for pim", | |
1008 | __PRETTY_FUNCTION__, up->rpf.source_nexthop.interface->name); | |
1009 | return 0; | |
1010 | } | |
627ed2a3 DS |
1011 | up->join_state = PIM_UPSTREAM_JOIN_PENDING; |
1012 | pim_upstream_start_register_stop_timer (up, 1); | |
1013 | ||
4ed0af70 | 1014 | rpg = RP (up->sg.grp); |
627ed2a3 DS |
1015 | memset (&ip_hdr, 0, sizeof (struct ip)); |
1016 | ip_hdr.ip_p = PIM_IP_PROTO_PIM; | |
1017 | ip_hdr.ip_hl = 5; | |
1018 | ip_hdr.ip_v = 4; | |
4ed0af70 DS |
1019 | ip_hdr.ip_src = up->sg.src; |
1020 | ip_hdr.ip_dst = up->sg.grp; | |
dc686f82 | 1021 | ip_hdr.ip_len = htons (20); |
627ed2a3 | 1022 | // checksum is broken |
4df01a4e DS |
1023 | pim_register_send ((uint8_t *)&ip_hdr, sizeof (struct ip), |
1024 | pim_ifp->primary_address, rpg, 1); | |
627ed2a3 DS |
1025 | break; |
1026 | default: | |
1027 | break; | |
1028 | } | |
1029 | ||
1030 | return 0; | |
1031 | } | |
1032 | ||
1033 | void | |
1034 | pim_upstream_start_register_stop_timer (struct pim_upstream *up, int null_register) | |
1035 | { | |
1036 | uint32_t time; | |
1037 | ||
1038 | if (up->t_rs_timer) | |
1039 | { | |
1040 | THREAD_TIMER_OFF (up->t_rs_timer); | |
1041 | up->t_rs_timer = NULL; | |
1042 | } | |
1043 | ||
1044 | if (!null_register) | |
1045 | { | |
1046 | uint32_t lower = (0.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1047 | uint32_t upper = (1.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1048 | time = lower + (random () % (upper - lower + 1)) - PIM_REGISTER_PROBE_PERIOD; | |
1049 | } | |
1050 | else | |
1051 | time = PIM_REGISTER_PROBE_PERIOD; | |
1052 | ||
1053 | if (PIM_DEBUG_TRACE) | |
1054 | { | |
05e451f8 DS |
1055 | zlog_debug ("%s: (S,G)=%s Starting upstream register stop timer %d", |
1056 | __PRETTY_FUNCTION__, pim_str_sg_dump (&up->sg), time); | |
627ed2a3 DS |
1057 | } |
1058 | THREAD_TIMER_ON (master, up->t_rs_timer, | |
1059 | pim_upstream_register_stop_timer, | |
1060 | up, time); | |
1061 | } | |
4fdc8f36 DS |
1062 | |
1063 | /* | |
1064 | * For a given upstream, determine the inherited_olist | |
1065 | * and apply it. | |
219e0013 DS |
1066 | * |
1067 | * inherited_olist(S,G,rpt) = | |
1068 | * ( joins(*,*,RP(G)) (+) joins(*,G) (-) prunes(S,G,rpt) ) | |
1069 | * (+) ( pim_include(*,G) (-) pim_exclude(S,G)) | |
1070 | * (-) ( lost_assert(*,G) (+) lost_assert(S,G,rpt) ) | |
1071 | * | |
1072 | * inherited_olist(S,G) = | |
1073 | * inherited_olist(S,G,rpt) (+) | |
1074 | * joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
1075 | * | |
4fdc8f36 DS |
1076 | * return 1 if there are any output interfaces |
1077 | * return 0 if there are not any output interfaces | |
1078 | */ | |
1079 | int | |
1080 | pim_upstream_inherited_olist (struct pim_upstream *up) | |
1081 | { | |
219e0013 DS |
1082 | struct pim_interface *pim_ifp; |
1083 | struct listnode *ifnextnode; | |
1084 | struct listnode *chnextnode; | |
1085 | struct pim_ifchannel *ch; | |
1086 | struct listnode *chnode; | |
1087 | struct listnode *ifnode; | |
1088 | struct interface *ifp; | |
219e0013 DS |
1089 | int output_intf = 0; |
1090 | ||
3667b0bc | 1091 | pim_ifp = up->rpf.source_nexthop.interface->info; |
da55afba | 1092 | if (pim_ifp && !up->channel_oil) |
3667b0bc | 1093 | up->channel_oil = pim_channel_oil_add (&up->sg, pim_ifp->mroute_vif_index); |
219e0013 | 1094 | |
7a3ddda5 | 1095 | for (ALL_LIST_ELEMENTS (vrf_iflist (VRF_DEFAULT), ifnode, ifnextnode, ifp)) |
219e0013 | 1096 | { |
7a3ddda5 DS |
1097 | pim_ifp = ifp->info; |
1098 | if (!pim_ifp) | |
1099 | continue; | |
219e0013 | 1100 | |
7a3ddda5 DS |
1101 | for (ALL_LIST_ELEMENTS (pim_ifp->pim_ifchannel_list, chnode, chnextnode, ch)) |
1102 | { | |
1103 | if (pim_upstream_evaluate_join_desired_interface (up, ch)) | |
219e0013 | 1104 | { |
7a3ddda5 DS |
1105 | pim_channel_add_oif (up->channel_oil, ifp, PIM_OIF_FLAG_PROTO_PIM); |
1106 | output_intf++; | |
219e0013 DS |
1107 | } |
1108 | } | |
1109 | } | |
1110 | ||
483eef9d DS |
1111 | /* |
1112 | * If we have output_intf switch state to Join and work like normal | |
1113 | * If we don't have an output_intf that means we are probably a | |
1114 | * switch on a stick so turn on forwarding to just accept the | |
1115 | * incoming packets so we don't bother the other stuff! | |
1116 | */ | |
1117 | if (output_intf) | |
1118 | pim_upstream_switch (up, PIM_UPSTREAM_JOINED); | |
1119 | else | |
1120 | forward_on (up); | |
219e0013 DS |
1121 | |
1122 | return output_intf; | |
4fdc8f36 | 1123 | } |
d3dd1804 DS |
1124 | |
1125 | /* | |
1126 | * When we have a new neighbor, | |
1127 | * find upstreams that don't have their rpf_addr | |
1128 | * set and see if the new neighbor allows | |
1129 | * the join to be sent | |
1130 | */ | |
1131 | void | |
1132 | pim_upstream_find_new_rpf (void) | |
1133 | { | |
1134 | struct listnode *up_node; | |
1135 | struct listnode *up_nextnode; | |
1136 | struct pim_upstream *up; | |
1137 | ||
1138 | /* | |
1139 | Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr | |
1140 | */ | |
1141 | for (ALL_LIST_ELEMENTS(qpim_upstream_list, up_node, up_nextnode, up)) | |
1142 | { | |
63c59d0c | 1143 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) |
d3dd1804 DS |
1144 | { |
1145 | if (PIM_DEBUG_PIM_TRACE) | |
1146 | zlog_debug ("Upstream %s without a path to send join, checking", | |
1147 | pim_str_sg_dump (&up->sg)); | |
1148 | pim_rpf_update (up, NULL); | |
1149 | } | |
1150 | } | |
1151 | } |