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12e41d03 DL |
1 | /* |
2 | PIM for Quagga | |
3 | Copyright (C) 2008 Everton da Silva Marques | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 2 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, but | |
11 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; see the file COPYING; if not, write to the | |
17 | Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, | |
18 | MA 02110-1301 USA | |
19 | ||
12e41d03 DL |
20 | */ |
21 | ||
22 | #include <zebra.h> | |
23 | ||
24 | #include "zebra/rib.h" | |
25 | ||
26 | #include "log.h" | |
27 | #include "zclient.h" | |
28 | #include "memory.h" | |
29 | #include "thread.h" | |
30 | #include "linklist.h" | |
dfe43e25 DW |
31 | #include "vty.h" |
32 | #include "plist.h" | |
0f588989 DS |
33 | #include "hash.h" |
34 | #include "jhash.h" | |
9c5e4d62 | 35 | #include "wheel.h" |
12e41d03 DL |
36 | |
37 | #include "pimd.h" | |
38 | #include "pim_pim.h" | |
39 | #include "pim_str.h" | |
40 | #include "pim_time.h" | |
41 | #include "pim_iface.h" | |
42 | #include "pim_join.h" | |
43 | #include "pim_zlookup.h" | |
44 | #include "pim_upstream.h" | |
45 | #include "pim_ifchannel.h" | |
46 | #include "pim_neighbor.h" | |
47 | #include "pim_rpf.h" | |
48 | #include "pim_zebra.h" | |
49 | #include "pim_oil.h" | |
50 | #include "pim_macro.h" | |
8f5f5e91 | 51 | #include "pim_rp.h" |
f14248dd | 52 | #include "pim_br.h" |
627ed2a3 | 53 | #include "pim_register.h" |
3c72d654 | 54 | #include "pim_msdp.h" |
12e41d03 | 55 | |
0f588989 DS |
56 | struct hash *pim_upstream_hash = NULL; |
57 | struct list *pim_upstream_list = NULL; | |
9c5e4d62 | 58 | struct timer_wheel *pim_upstream_sg_wheel = NULL; |
0f588989 | 59 | |
12e41d03 DL |
60 | static void join_timer_start(struct pim_upstream *up); |
61 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up); | |
62 | ||
cfa91a87 DS |
63 | /* |
64 | * A (*,G) or a (*,*) is going away | |
65 | * remove the parent pointer from | |
66 | * those pointing at us | |
67 | */ | |
68 | static void | |
69 | pim_upstream_remove_children (struct pim_upstream *up) | |
70 | { | |
cfa91a87 DS |
71 | struct pim_upstream *child; |
72 | ||
03417ccd | 73 | if (!up->sources) |
cfa91a87 DS |
74 | return; |
75 | ||
03417ccd | 76 | while (!list_isempty (up->sources)) |
cfa91a87 | 77 | { |
03417ccd DS |
78 | child = listnode_head (up->sources); |
79 | child->parent = NULL; | |
80 | listnode_delete (up->sources, child); | |
cfa91a87 DS |
81 | } |
82 | } | |
83 | ||
84 | /* | |
85 | * A (*,G) or a (*,*) is being created | |
86 | * Find the children that would point | |
87 | * at us. | |
88 | */ | |
89 | static void | |
90 | pim_upstream_find_new_children (struct pim_upstream *up) | |
91 | { | |
92 | struct pim_upstream *child; | |
93 | struct listnode *ch_node; | |
94 | ||
4ed0af70 DS |
95 | if ((up->sg.src.s_addr != INADDR_ANY) && |
96 | (up->sg.grp.s_addr != INADDR_ANY)) | |
cfa91a87 DS |
97 | return; |
98 | ||
4ed0af70 DS |
99 | if ((up->sg.src.s_addr == INADDR_ANY) && |
100 | (up->sg.grp.s_addr == INADDR_ANY)) | |
cfa91a87 DS |
101 | return; |
102 | ||
0f588989 | 103 | for (ALL_LIST_ELEMENTS_RO (pim_upstream_list, ch_node, child)) |
cfa91a87 | 104 | { |
4ed0af70 | 105 | if ((up->sg.grp.s_addr != INADDR_ANY) && |
0f588989 | 106 | (child->sg.grp.s_addr == up->sg.grp.s_addr) && |
cfa91a87 | 107 | (child != up)) |
03417ccd DS |
108 | { |
109 | child->parent = up; | |
110 | listnode_add_sort (up->sources, child); | |
111 | } | |
cfa91a87 DS |
112 | } |
113 | } | |
114 | ||
4d99418b DS |
115 | /* |
116 | * If we have a (*,*) || (S,*) there is no parent | |
117 | * If we have a (S,G), find the (*,G) | |
118 | * If we have a (*,G), find the (*,*) | |
119 | */ | |
120 | static struct pim_upstream * | |
03417ccd | 121 | pim_upstream_find_parent (struct pim_upstream *child) |
4d99418b | 122 | { |
03417ccd DS |
123 | struct prefix_sg any = child->sg; |
124 | struct pim_upstream *up = NULL; | |
4d99418b DS |
125 | |
126 | // (S,G) | |
03417ccd DS |
127 | if ((child->sg.src.s_addr != INADDR_ANY) && |
128 | (child->sg.grp.s_addr != INADDR_ANY)) | |
4d99418b | 129 | { |
4ed0af70 | 130 | any.src.s_addr = INADDR_ANY; |
03417ccd DS |
131 | up = pim_upstream_find (&any); |
132 | ||
133 | if (up) | |
134 | listnode_add (up->sources, child); | |
135 | ||
136 | return up; | |
4d99418b DS |
137 | } |
138 | ||
03417ccd | 139 | return NULL; |
4d99418b DS |
140 | } |
141 | ||
12e41d03 DL |
142 | void pim_upstream_free(struct pim_upstream *up) |
143 | { | |
144 | XFREE(MTYPE_PIM_UPSTREAM, up); | |
145 | } | |
146 | ||
147 | static void upstream_channel_oil_detach(struct pim_upstream *up) | |
148 | { | |
149 | if (up->channel_oil) { | |
150 | pim_channel_oil_del(up->channel_oil); | |
25a335e0 | 151 | up->channel_oil = NULL; |
12e41d03 DL |
152 | } |
153 | } | |
154 | ||
e5905a3b DS |
155 | void |
156 | pim_upstream_del(struct pim_upstream *up, const char *name) | |
12e41d03 | 157 | { |
7667c556 | 158 | bool notify_msdp = false; |
159 | ||
3197cb1e DS |
160 | if (PIM_DEBUG_TRACE) |
161 | zlog_debug ("%s(%s): Delete %s ref count: %d", | |
162 | __PRETTY_FUNCTION__, name, up->sg_str, up->ref_count); | |
163 | ||
e5905a3b DS |
164 | --up->ref_count; |
165 | ||
166 | if (up->ref_count >= 1) | |
167 | return; | |
168 | ||
12e41d03 | 169 | THREAD_OFF(up->t_join_timer); |
f14248dd | 170 | THREAD_OFF(up->t_ka_timer); |
792f4d29 | 171 | THREAD_OFF(up->t_rs_timer); |
1bf16443 | 172 | THREAD_OFF(up->t_msdp_reg_timer); |
12e41d03 | 173 | |
7667c556 | 174 | if (up->join_state == PIM_UPSTREAM_JOINED) { |
175 | pim_joinprune_send (up->rpf.source_nexthop.interface, | |
176 | up->rpf.rpf_addr.u.prefix4, | |
177 | up, 0); | |
178 | if (up->sg.src.s_addr == INADDR_ANY) { | |
179 | /* if a (*, G) entry in the joined state is being deleted we | |
180 | * need to notify MSDP */ | |
181 | notify_msdp = true; | |
182 | } | |
183 | } | |
184 | ||
36e466fe | 185 | if (up->sg.src.s_addr != INADDR_ANY) { |
9c5e4d62 | 186 | wheel_remove_item (pim_upstream_sg_wheel, up); |
36e466fe | 187 | notify_msdp = true; |
188 | } | |
9c5e4d62 | 189 | |
cfa91a87 | 190 | pim_upstream_remove_children (up); |
6a78764e | 191 | pim_mroute_del (up->channel_oil, __PRETTY_FUNCTION__); |
12e41d03 DL |
192 | upstream_channel_oil_detach(up); |
193 | ||
03417ccd DS |
194 | if (up->sources) |
195 | list_delete (up->sources); | |
196 | up->sources = NULL; | |
197 | ||
12e41d03 DL |
198 | /* |
199 | notice that listnode_delete() can't be moved | |
200 | into pim_upstream_free() because the later is | |
201 | called by list_delete_all_node() | |
202 | */ | |
03417ccd DS |
203 | if (up->parent) |
204 | { | |
205 | listnode_delete (up->parent->sources, up); | |
206 | up->parent = NULL; | |
207 | } | |
0f588989 DS |
208 | listnode_delete (pim_upstream_list, up); |
209 | hash_release (pim_upstream_hash, up); | |
12e41d03 | 210 | |
7667c556 | 211 | if (notify_msdp) { |
36e466fe | 212 | pim_msdp_up_del(&up->sg); |
7667c556 | 213 | } |
12e41d03 DL |
214 | pim_upstream_free(up); |
215 | } | |
216 | ||
56638739 DS |
217 | void |
218 | pim_upstream_send_join (struct pim_upstream *up) | |
12e41d03 | 219 | { |
3197cb1e | 220 | if (PIM_DEBUG_TRACE) { |
eaa54bdb | 221 | char rpf_str[PREFIX_STRLEN]; |
63c59d0c | 222 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_str, sizeof(rpf_str)); |
05e451f8 | 223 | zlog_debug ("%s: RPF'%s=%s(%s) for Interface %s", __PRETTY_FUNCTION__, |
8bfb8b67 | 224 | up->sg_str, rpf_str, pim_upstream_state2str (up->join_state), |
56638739 | 225 | up->rpf.source_nexthop.interface->name); |
63c59d0c | 226 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { |
05e451f8 | 227 | zlog_debug("%s: can't send join upstream: RPF'%s=%s", |
56638739 | 228 | __PRETTY_FUNCTION__, |
8bfb8b67 | 229 | up->sg_str, rpf_str); |
12e41d03 DL |
230 | /* warning only */ |
231 | } | |
232 | } | |
56638739 | 233 | |
12e41d03 DL |
234 | /* send Join(S,G) to the current upstream neighbor */ |
235 | pim_joinprune_send(up->rpf.source_nexthop.interface, | |
63c59d0c | 236 | up->rpf.rpf_addr.u.prefix4, |
372eab92 | 237 | up, |
12e41d03 DL |
238 | 1 /* join */); |
239 | } | |
240 | ||
241 | static int on_join_timer(struct thread *t) | |
242 | { | |
243 | struct pim_upstream *up; | |
244 | ||
12e41d03 | 245 | up = THREAD_ARG(t); |
12e41d03 | 246 | |
bb6e291f DS |
247 | up->t_join_timer = NULL; |
248 | ||
249 | /* | |
250 | * In the case of a HFR we will not ahve anyone to send this to. | |
251 | */ | |
0bf27c5c | 252 | if (PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) |
bb6e291f DS |
253 | return 0; |
254 | ||
eb345962 DS |
255 | /* |
256 | * Don't send the join if the outgoing interface is a loopback | |
257 | * But since this might change leave the join timer running | |
258 | */ | |
259 | if (!if_is_loopback (up->rpf.source_nexthop.interface)) | |
260 | pim_upstream_send_join (up); | |
12e41d03 | 261 | |
12e41d03 DL |
262 | join_timer_start(up); |
263 | ||
264 | return 0; | |
265 | } | |
266 | ||
267 | static void join_timer_start(struct pim_upstream *up) | |
268 | { | |
269 | if (PIM_DEBUG_PIM_EVENTS) { | |
05e451f8 | 270 | zlog_debug("%s: starting %d sec timer for upstream (S,G)=%s", |
12e41d03 DL |
271 | __PRETTY_FUNCTION__, |
272 | qpim_t_periodic, | |
8bfb8b67 | 273 | up->sg_str); |
12e41d03 DL |
274 | } |
275 | ||
8e38a2cf | 276 | THREAD_OFF (up->t_join_timer); |
12e41d03 DL |
277 | THREAD_TIMER_ON(master, up->t_join_timer, |
278 | on_join_timer, | |
279 | up, qpim_t_periodic); | |
280 | } | |
281 | ||
282 | void pim_upstream_join_timer_restart(struct pim_upstream *up) | |
283 | { | |
284 | THREAD_OFF(up->t_join_timer); | |
285 | join_timer_start(up); | |
286 | } | |
287 | ||
288 | static void pim_upstream_join_timer_restart_msec(struct pim_upstream *up, | |
289 | int interval_msec) | |
290 | { | |
291 | if (PIM_DEBUG_PIM_EVENTS) { | |
05e451f8 | 292 | zlog_debug("%s: restarting %d msec timer for upstream (S,G)=%s", |
12e41d03 DL |
293 | __PRETTY_FUNCTION__, |
294 | interval_msec, | |
8bfb8b67 | 295 | up->sg_str); |
12e41d03 DL |
296 | } |
297 | ||
298 | THREAD_OFF(up->t_join_timer); | |
299 | THREAD_TIMER_MSEC_ON(master, up->t_join_timer, | |
300 | on_join_timer, | |
301 | up, interval_msec); | |
302 | } | |
303 | ||
304 | void pim_upstream_join_suppress(struct pim_upstream *up, | |
305 | struct in_addr rpf_addr, | |
306 | int holdtime) | |
307 | { | |
308 | long t_joinsuppress_msec; | |
309 | long join_timer_remain_msec; | |
310 | ||
311 | t_joinsuppress_msec = MIN(pim_if_t_suppressed_msec(up->rpf.source_nexthop.interface), | |
312 | 1000 * holdtime); | |
313 | ||
314 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
315 | ||
3197cb1e | 316 | if (PIM_DEBUG_TRACE) { |
eaa54bdb | 317 | char rpf_str[INET_ADDRSTRLEN]; |
12e41d03 | 318 | pim_inet4_dump("<rpf?>", rpf_addr, rpf_str, sizeof(rpf_str)); |
05e451f8 | 319 | zlog_debug("%s %s: detected Join%s to RPF'(S,G)=%s: join_timer=%ld msec t_joinsuppress=%ld msec", |
12e41d03 | 320 | __FILE__, __PRETTY_FUNCTION__, |
8bfb8b67 | 321 | up->sg_str, |
12e41d03 DL |
322 | rpf_str, |
323 | join_timer_remain_msec, t_joinsuppress_msec); | |
324 | } | |
325 | ||
326 | if (join_timer_remain_msec < t_joinsuppress_msec) { | |
3197cb1e | 327 | if (PIM_DEBUG_TRACE) { |
05e451f8 | 328 | zlog_debug("%s %s: suppressing Join(S,G)=%s for %ld msec", |
12e41d03 | 329 | __FILE__, __PRETTY_FUNCTION__, |
8bfb8b67 | 330 | up->sg_str, t_joinsuppress_msec); |
12e41d03 DL |
331 | } |
332 | ||
333 | pim_upstream_join_timer_restart_msec(up, t_joinsuppress_msec); | |
334 | } | |
335 | } | |
336 | ||
337 | void pim_upstream_join_timer_decrease_to_t_override(const char *debug_label, | |
338 | struct pim_upstream *up, | |
339 | struct in_addr rpf_addr) | |
340 | { | |
341 | long join_timer_remain_msec; | |
342 | int t_override_msec; | |
343 | ||
344 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
345 | t_override_msec = pim_if_t_override_msec(up->rpf.source_nexthop.interface); | |
346 | ||
3197cb1e | 347 | if (PIM_DEBUG_TRACE) { |
eaa54bdb | 348 | char rpf_str[INET_ADDRSTRLEN]; |
12e41d03 | 349 | pim_inet4_dump("<rpf?>", rpf_addr, rpf_str, sizeof(rpf_str)); |
05e451f8 | 350 | zlog_debug("%s: to RPF'%s=%s: join_timer=%ld msec t_override=%d msec", |
12e41d03 | 351 | debug_label, |
8bfb8b67 | 352 | up->sg_str, rpf_str, |
12e41d03 DL |
353 | join_timer_remain_msec, t_override_msec); |
354 | } | |
355 | ||
356 | if (join_timer_remain_msec > t_override_msec) { | |
3197cb1e | 357 | if (PIM_DEBUG_TRACE) { |
05e451f8 | 358 | zlog_debug("%s: decreasing (S,G)=%s join timer to t_override=%d msec", |
12e41d03 | 359 | debug_label, |
8bfb8b67 | 360 | up->sg_str, |
12e41d03 DL |
361 | t_override_msec); |
362 | } | |
363 | ||
364 | pim_upstream_join_timer_restart_msec(up, t_override_msec); | |
365 | } | |
366 | } | |
367 | ||
368 | static void forward_on(struct pim_upstream *up) | |
369 | { | |
12e41d03 DL |
370 | struct listnode *chnode; |
371 | struct listnode *chnextnode; | |
12e41d03 DL |
372 | struct pim_interface *pim_ifp; |
373 | struct pim_ifchannel *ch; | |
374 | ||
ea4a71fc DS |
375 | /* scan (S,G) state */ |
376 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
377 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
378 | if (!pim_ifp) |
379 | continue; | |
380 | ||
ea4a71fc DS |
381 | if (ch->upstream != up) |
382 | continue; | |
12e41d03 | 383 | |
ea4a71fc DS |
384 | if (pim_macro_chisin_oiflist(ch)) |
385 | pim_forward_start(ch); | |
12e41d03 | 386 | |
ea4a71fc | 387 | } /* scan iface channel list */ |
12e41d03 DL |
388 | } |
389 | ||
390 | static void forward_off(struct pim_upstream *up) | |
391 | { | |
12e41d03 DL |
392 | struct listnode *chnode; |
393 | struct listnode *chnextnode; | |
12e41d03 DL |
394 | struct pim_interface *pim_ifp; |
395 | struct pim_ifchannel *ch; | |
396 | ||
ea4a71fc DS |
397 | /* scan per-interface (S,G) state */ |
398 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
399 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
400 | if (!pim_ifp) |
401 | continue; | |
402 | ||
ea4a71fc DS |
403 | if (ch->upstream != up) |
404 | continue; | |
12e41d03 | 405 | |
ea4a71fc | 406 | pim_forward_stop(ch); |
12e41d03 | 407 | |
ea4a71fc | 408 | } /* scan iface channel list */ |
12e41d03 DL |
409 | } |
410 | ||
bb6e291f DS |
411 | static int |
412 | pim_upstream_could_register (struct pim_upstream *up) | |
413 | { | |
414 | struct pim_interface *pim_ifp = up->rpf.source_nexthop.interface->info; | |
415 | ||
35917570 | 416 | if (pim_ifp && PIM_I_am_DR (pim_ifp) && |
bb6e291f DS |
417 | pim_if_connected_to_source (up->rpf.source_nexthop.interface, up->sg.src)) |
418 | return 1; | |
419 | ||
420 | return 0; | |
421 | } | |
422 | ||
7fcdfb34 DS |
423 | void |
424 | pim_upstream_switch(struct pim_upstream *up, | |
425 | enum pim_upstream_state new_state) | |
12e41d03 DL |
426 | { |
427 | enum pim_upstream_state old_state = up->join_state; | |
428 | ||
12e41d03 | 429 | if (PIM_DEBUG_PIM_EVENTS) { |
c9802954 | 430 | zlog_debug("%s: PIM_UPSTREAM_%s: (S,G) old: %s new: %s", |
12e41d03 | 431 | __PRETTY_FUNCTION__, |
8bfb8b67 | 432 | up->sg_str, |
c9802954 DS |
433 | pim_upstream_state2str (up->join_state), |
434 | pim_upstream_state2str (new_state)); | |
12e41d03 DL |
435 | } |
436 | ||
bb027ee8 DS |
437 | /* |
438 | * This code still needs work. | |
439 | */ | |
440 | switch (up->join_state) | |
441 | { | |
442 | case PIM_UPSTREAM_PRUNE: | |
0bf27c5c | 443 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) |
7747bad6 DS |
444 | { |
445 | up->join_state = new_state; | |
446 | up->state_transition = pim_time_monotonic_sec (); | |
447 | } | |
448 | break; | |
bb027ee8 DS |
449 | case PIM_UPSTREAM_JOIN_PENDING: |
450 | break; | |
451 | case PIM_UPSTREAM_NOTJOINED: | |
452 | case PIM_UPSTREAM_JOINED: | |
453 | up->join_state = new_state; | |
e5b6b229 DS |
454 | if (old_state != new_state) |
455 | up->state_transition = pim_time_monotonic_sec(); | |
bb027ee8 DS |
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); |
7667c556 | 467 | pim_msdp_up_join_state_changed(up); |
0bf27c5c | 468 | if (pim_upstream_could_register (up)) |
bb6e291f | 469 | { |
0bf27c5c | 470 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); |
a9b59879 | 471 | if (!old_fhr && PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) |
bb6e291f DS |
472 | { |
473 | pim_upstream_keep_alive_timer_start (up, qpim_keep_alive_time); | |
474 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); | |
475 | } | |
476 | } | |
477 | else | |
478 | { | |
479 | pim_upstream_send_join (up); | |
480 | join_timer_start (up); | |
481 | } | |
81900c5a DS |
482 | } |
483 | else | |
484 | { | |
485 | forward_on (up); | |
486 | } | |
12e41d03 DL |
487 | } |
488 | else { | |
489 | forward_off(up); | |
7667c556 | 490 | if (old_state == PIM_UPSTREAM_JOINED) |
491 | pim_msdp_up_join_state_changed(up); | |
12e41d03 | 492 | pim_joinprune_send(up->rpf.source_nexthop.interface, |
63c59d0c | 493 | up->rpf.rpf_addr.u.prefix4, |
372eab92 | 494 | up, |
12e41d03 | 495 | 0 /* prune */); |
7fcdfb34 DS |
496 | if (up->t_join_timer) |
497 | THREAD_OFF(up->t_join_timer); | |
12e41d03 | 498 | } |
12e41d03 DL |
499 | } |
500 | ||
03417ccd DS |
501 | static int |
502 | pim_upstream_compare (void *arg1, void *arg2) | |
503 | { | |
504 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; | |
505 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
506 | ||
507 | if (ntohl(up1->sg.grp.s_addr) < ntohl(up2->sg.grp.s_addr)) | |
508 | return -1; | |
509 | ||
510 | if (ntohl(up1->sg.grp.s_addr) > ntohl(up2->sg.grp.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 | if (ntohl(up1->sg.src.s_addr) > ntohl(up2->sg.src.s_addr)) | |
517 | return 1; | |
518 | ||
519 | return 0; | |
520 | } | |
521 | ||
07335c8d DS |
522 | static struct pim_upstream * |
523 | pim_upstream_new (struct prefix_sg *sg, | |
524 | struct interface *incoming, | |
525 | int flags) | |
12e41d03 | 526 | { |
2f702571 | 527 | enum pim_rpf_result rpf_result; |
07335c8d DS |
528 | struct pim_interface *pim_ifp; |
529 | struct pim_upstream *up; | |
12e41d03 | 530 | |
36d9e7dc | 531 | up = XCALLOC(MTYPE_PIM_UPSTREAM, sizeof(*up)); |
12e41d03 | 532 | if (!up) { |
36d9e7dc | 533 | zlog_err("%s: PIM XCALLOC(%zu) failure", |
12e41d03 | 534 | __PRETTY_FUNCTION__, sizeof(*up)); |
8f5f5e91 | 535 | return NULL; |
12e41d03 DL |
536 | } |
537 | ||
5074a423 | 538 | up->sg = *sg; |
8bfb8b67 | 539 | pim_str_sg_set (sg, up->sg_str); |
0f588989 | 540 | up = hash_get (pim_upstream_hash, up, hash_alloc_intern); |
36d6bd7d | 541 | if (!pim_rp_set_upstream_addr (&up->upstream_addr, sg->src, sg->grp)) |
8f5f5e91 | 542 | { |
3197cb1e | 543 | if (PIM_DEBUG_TRACE) |
8f5f5e91 DS |
544 | zlog_debug("%s: Received a (*,G) with no RP configured", __PRETTY_FUNCTION__); |
545 | ||
03417ccd | 546 | hash_release (pim_upstream_hash, up); |
8f5f5e91 DS |
547 | XFREE (MTYPE_PIM_UPSTREAM, up); |
548 | return NULL; | |
549 | } | |
550 | ||
03417ccd DS |
551 | up->parent = pim_upstream_find_parent (up); |
552 | if (up->sg.src.s_addr == INADDR_ANY) | |
553 | { | |
554 | up->sources = list_new (); | |
555 | up->sources->cmp = pim_upstream_compare; | |
556 | } | |
557 | else | |
558 | up->sources = NULL; | |
559 | ||
cfa91a87 | 560 | pim_upstream_find_new_children (up); |
4a40c37a | 561 | up->flags = flags; |
12e41d03 | 562 | up->ref_count = 1; |
4a4c4a07 DS |
563 | up->t_join_timer = NULL; |
564 | up->t_ka_timer = NULL; | |
792f4d29 | 565 | up->t_rs_timer = NULL; |
1bf16443 | 566 | up->t_msdp_reg_timer = NULL; |
12e41d03 DL |
567 | up->join_state = 0; |
568 | up->state_transition = pim_time_monotonic_sec(); | |
4a4c4a07 | 569 | up->channel_oil = NULL; |
f9e0ab5b | 570 | up->sptbit = PIM_UPSTREAM_SPTBIT_FALSE; |
12e41d03 | 571 | |
f24405b1 | 572 | up->rpf.source_nexthop.interface = NULL; |
63c59d0c DS |
573 | up->rpf.source_nexthop.mrib_nexthop_addr.family = AF_INET; |
574 | up->rpf.source_nexthop.mrib_nexthop_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
12e41d03 DL |
575 | up->rpf.source_nexthop.mrib_metric_preference = qpim_infinite_assert_metric.metric_preference; |
576 | up->rpf.source_nexthop.mrib_route_metric = qpim_infinite_assert_metric.route_metric; | |
63c59d0c DS |
577 | up->rpf.rpf_addr.family = AF_INET; |
578 | up->rpf.rpf_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
12e41d03 | 579 | |
9c5e4d62 DS |
580 | if (up->sg.src.s_addr != INADDR_ANY) |
581 | wheel_add_item (pim_upstream_sg_wheel, up); | |
582 | ||
d3dd1804 | 583 | rpf_result = pim_rpf_update(up, NULL); |
2f702571 | 584 | if (rpf_result == PIM_RPF_FAILURE) { |
3197cb1e | 585 | if (PIM_DEBUG_TRACE) |
4a40c37a | 586 | zlog_debug ("%s: Attempting to create upstream(%s), Unable to RPF for source", __PRETTY_FUNCTION__, |
8bfb8b67 | 587 | up->sg_str); |
03417ccd DS |
588 | |
589 | if (up->parent) | |
590 | { | |
591 | listnode_delete (up->parent->sources, up); | |
592 | up->parent = NULL; | |
593 | } | |
9c5e4d62 DS |
594 | |
595 | if (up->sg.src.s_addr != INADDR_ANY) | |
596 | wheel_remove_item (pim_upstream_sg_wheel, up); | |
597 | ||
03417ccd DS |
598 | pim_upstream_remove_children (up); |
599 | if (up->sources) | |
600 | list_delete (up->sources); | |
601 | ||
602 | hash_release (pim_upstream_hash, up); | |
2f702571 DS |
603 | XFREE(MTYPE_PIM_UPSTREAM, up); |
604 | return NULL; | |
605 | } | |
12e41d03 | 606 | |
07335c8d DS |
607 | pim_ifp = up->rpf.source_nexthop.interface->info; |
608 | if (pim_ifp) | |
609 | up->channel_oil = pim_channel_oil_add(&up->sg, pim_ifp->mroute_vif_index); | |
610 | ||
0f588989 | 611 | listnode_add_sort(pim_upstream_list, up); |
12e41d03 | 612 | |
3197cb1e | 613 | if (PIM_DEBUG_TRACE) |
8bfb8b67 | 614 | zlog_debug ("%s: Created Upstream %s", __PRETTY_FUNCTION__, up->sg_str); |
03417ccd | 615 | |
12e41d03 DL |
616 | return up; |
617 | } | |
618 | ||
4ed0af70 | 619 | struct pim_upstream *pim_upstream_find(struct prefix_sg *sg) |
12e41d03 | 620 | { |
0f588989 DS |
621 | struct pim_upstream lookup; |
622 | struct pim_upstream *up = NULL; | |
12e41d03 | 623 | |
0f588989 DS |
624 | lookup.sg = *sg; |
625 | up = hash_lookup (pim_upstream_hash, &lookup); | |
626 | return up; | |
12e41d03 DL |
627 | } |
628 | ||
1bf16443 | 629 | static void pim_upstream_ref(struct pim_upstream *up, int flags) |
630 | { | |
631 | up->flags |= flags; | |
632 | ++up->ref_count; | |
633 | } | |
634 | ||
4ed0af70 | 635 | struct pim_upstream *pim_upstream_add(struct prefix_sg *sg, |
4a40c37a | 636 | struct interface *incoming, |
e5905a3b | 637 | int flags, const char *name) |
12e41d03 | 638 | { |
594a78cc | 639 | struct pim_upstream *up = NULL; |
e5905a3b | 640 | int found = 0; |
5074a423 | 641 | up = pim_upstream_find(sg); |
12e41d03 | 642 | if (up) { |
1bf16443 | 643 | pim_upstream_ref(up, flags); |
e5905a3b | 644 | found = 1; |
12e41d03 DL |
645 | } |
646 | else { | |
4a40c37a | 647 | up = pim_upstream_new(sg, incoming, flags); |
12e41d03 DL |
648 | } |
649 | ||
e5905a3b | 650 | if (PIM_DEBUG_TRACE) |
f4075cb4 DS |
651 | { |
652 | if (up) | |
3197cb1e | 653 | zlog_debug("%s(%s): %s, found: %d: ref_count: %d", |
f4075cb4 | 654 | __PRETTY_FUNCTION__, name, |
8bfb8b67 | 655 | up->sg_str, found, |
f4075cb4 DS |
656 | up->ref_count); |
657 | else | |
658 | zlog_debug("%s(%s): (%s) failure to create", | |
659 | __PRETTY_FUNCTION__, name, | |
660 | pim_str_sg_dump (sg)); | |
661 | } | |
12e41d03 | 662 | |
e5905a3b | 663 | return up; |
12e41d03 DL |
664 | } |
665 | ||
7a3ddda5 DS |
666 | static int |
667 | pim_upstream_evaluate_join_desired_interface (struct pim_upstream *up, | |
668 | struct pim_ifchannel *ch) | |
669 | { | |
670 | struct pim_upstream *parent = up->parent; | |
671 | ||
672 | if (ch->upstream == up) | |
673 | { | |
674 | if (!pim_macro_ch_lost_assert(ch) && pim_macro_chisin_joins_or_include(ch)) | |
675 | return 1; | |
46c8aab8 DS |
676 | |
677 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) | |
678 | return 0; | |
7a3ddda5 | 679 | } |
46c8aab8 | 680 | |
7a3ddda5 DS |
681 | /* |
682 | * joins (*,G) | |
683 | */ | |
684 | if (parent && ch->upstream == parent) | |
685 | { | |
686 | if (!pim_macro_ch_lost_assert (ch) && pim_macro_chisin_joins_or_include (ch)) | |
687 | return 1; | |
688 | } | |
689 | ||
690 | return 0; | |
691 | } | |
692 | ||
12e41d03 DL |
693 | /* |
694 | Evaluate JoinDesired(S,G): | |
695 | ||
696 | JoinDesired(S,G) is true if there is a downstream (S,G) interface I | |
697 | in the set: | |
698 | ||
699 | inherited_olist(S,G) = | |
700 | joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
701 | ||
702 | JoinDesired(S,G) may be affected by changes in the following: | |
703 | ||
704 | pim_ifp->primary_address | |
705 | pim_ifp->pim_dr_addr | |
706 | ch->ifassert_winner_metric | |
707 | ch->ifassert_winner | |
708 | ch->local_ifmembership | |
709 | ch->ifjoin_state | |
710 | ch->upstream->rpf.source_nexthop.mrib_metric_preference | |
711 | ch->upstream->rpf.source_nexthop.mrib_route_metric | |
712 | ch->upstream->rpf.source_nexthop.interface | |
713 | ||
714 | See also pim_upstream_update_join_desired() below. | |
715 | */ | |
716 | int pim_upstream_evaluate_join_desired(struct pim_upstream *up) | |
717 | { | |
12e41d03 DL |
718 | struct listnode *chnode; |
719 | struct listnode *chnextnode; | |
12e41d03 DL |
720 | struct pim_interface *pim_ifp; |
721 | struct pim_ifchannel *ch; | |
7a3ddda5 | 722 | int ret = 0; |
12e41d03 | 723 | |
ea4a71fc DS |
724 | /* scan per-interface (S,G) state */ |
725 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) | |
726 | { | |
727 | pim_ifp = ch->interface->info; | |
728 | if (!pim_ifp) | |
729 | continue; | |
12e41d03 | 730 | |
ea4a71fc DS |
731 | ret += pim_upstream_evaluate_join_desired_interface (up, ch); |
732 | } /* scan iface channel list */ | |
12e41d03 | 733 | |
7a3ddda5 | 734 | return ret; /* false */ |
12e41d03 DL |
735 | } |
736 | ||
737 | /* | |
738 | See also pim_upstream_evaluate_join_desired() above. | |
739 | */ | |
740 | void pim_upstream_update_join_desired(struct pim_upstream *up) | |
741 | { | |
742 | int was_join_desired; /* boolean */ | |
743 | int is_join_desired; /* boolean */ | |
744 | ||
745 | was_join_desired = PIM_UPSTREAM_FLAG_TEST_DR_JOIN_DESIRED(up->flags); | |
746 | ||
747 | is_join_desired = pim_upstream_evaluate_join_desired(up); | |
748 | if (is_join_desired) | |
749 | PIM_UPSTREAM_FLAG_SET_DR_JOIN_DESIRED(up->flags); | |
750 | else | |
751 | PIM_UPSTREAM_FLAG_UNSET_DR_JOIN_DESIRED(up->flags); | |
752 | ||
753 | /* switched from false to true */ | |
754 | if (is_join_desired && !was_join_desired) { | |
12e41d03 DL |
755 | pim_upstream_switch(up, PIM_UPSTREAM_JOINED); |
756 | return; | |
757 | } | |
758 | ||
759 | /* switched from true to false */ | |
760 | if (!is_join_desired && was_join_desired) { | |
12e41d03 DL |
761 | pim_upstream_switch(up, PIM_UPSTREAM_NOTJOINED); |
762 | return; | |
763 | } | |
764 | } | |
765 | ||
766 | /* | |
767 | RFC 4601 4.5.7. Sending (S,G) Join/Prune Messages | |
768 | Transitions from Joined State | |
769 | RPF'(S,G) GenID changes | |
770 | ||
771 | The upstream (S,G) state machine remains in Joined state. If the | |
772 | Join Timer is set to expire in more than t_override seconds, reset | |
773 | it so that it expires after t_override seconds. | |
774 | */ | |
775 | void pim_upstream_rpf_genid_changed(struct in_addr neigh_addr) | |
776 | { | |
777 | struct listnode *up_node; | |
778 | struct listnode *up_nextnode; | |
779 | struct pim_upstream *up; | |
780 | ||
781 | /* | |
0f588989 DS |
782 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr |
783 | */ | |
784 | for (ALL_LIST_ELEMENTS(pim_upstream_list, up_node, up_nextnode, up)) { | |
12e41d03 | 785 | |
3197cb1e | 786 | if (PIM_DEBUG_TRACE) { |
eaa54bdb DW |
787 | char neigh_str[INET_ADDRSTRLEN]; |
788 | char rpf_addr_str[PREFIX_STRLEN]; | |
12e41d03 | 789 | pim_inet4_dump("<neigh?>", neigh_addr, neigh_str, sizeof(neigh_str)); |
63c59d0c | 790 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_addr_str, sizeof(rpf_addr_str)); |
05e451f8 | 791 | zlog_debug("%s: matching neigh=%s against upstream (S,G)=%s joined=%d rpf_addr=%s", |
12e41d03 | 792 | __PRETTY_FUNCTION__, |
8bfb8b67 | 793 | neigh_str, up->sg_str, |
12e41d03 DL |
794 | up->join_state == PIM_UPSTREAM_JOINED, |
795 | rpf_addr_str); | |
796 | } | |
797 | ||
798 | /* consider only (S,G) upstream in Joined state */ | |
799 | if (up->join_state != PIM_UPSTREAM_JOINED) | |
800 | continue; | |
801 | ||
802 | /* match RPF'(S,G)=neigh_addr */ | |
63c59d0c | 803 | if (up->rpf.rpf_addr.u.prefix4.s_addr != neigh_addr.s_addr) |
12e41d03 DL |
804 | continue; |
805 | ||
806 | pim_upstream_join_timer_decrease_to_t_override("RPF'(S,G) GenID change", | |
807 | up, neigh_addr); | |
808 | } | |
809 | } | |
810 | ||
811 | ||
812 | void pim_upstream_rpf_interface_changed(struct pim_upstream *up, | |
813 | struct interface *old_rpf_ifp) | |
814 | { | |
ea4a71fc DS |
815 | struct listnode *chnode; |
816 | struct listnode *chnextnode; | |
817 | struct pim_ifchannel *ch; | |
818 | struct pim_interface *pim_ifp; | |
819 | ||
820 | /* search all ifchannels */ | |
821 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
822 | ||
823 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
824 | if (!pim_ifp) |
825 | continue; | |
826 | ||
ea4a71fc DS |
827 | if (ch->upstream != up) |
828 | continue; | |
12e41d03 | 829 | |
ea4a71fc DS |
830 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { |
831 | if ( | |
832 | /* RPF_interface(S) was NOT I */ | |
833 | (old_rpf_ifp == ch->interface) | |
834 | && | |
835 | /* RPF_interface(S) stopped being I */ | |
836 | (ch->upstream->rpf.source_nexthop.interface != ch->interface) | |
837 | ) { | |
838 | assert_action_a5(ch); | |
839 | } | |
840 | } /* PIM_IFASSERT_I_AM_LOSER */ | |
12e41d03 | 841 | |
ea4a71fc | 842 | pim_ifchannel_update_assert_tracking_desired(ch); |
12e41d03 DL |
843 | } |
844 | } | |
845 | ||
846 | void pim_upstream_update_could_assert(struct pim_upstream *up) | |
847 | { | |
12e41d03 DL |
848 | struct listnode *chnode; |
849 | struct listnode *chnextnode; | |
12e41d03 DL |
850 | struct pim_interface *pim_ifp; |
851 | struct pim_ifchannel *ch; | |
852 | ||
ea4a71fc DS |
853 | /* scan per-interface (S,G) state */ |
854 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
855 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
856 | if (!pim_ifp) |
857 | continue; | |
858 | ||
ea4a71fc DS |
859 | if (ch->upstream != up) |
860 | continue; | |
12e41d03 | 861 | |
ea4a71fc DS |
862 | pim_ifchannel_update_could_assert(ch); |
863 | } /* scan iface channel list */ | |
12e41d03 DL |
864 | } |
865 | ||
866 | void pim_upstream_update_my_assert_metric(struct pim_upstream *up) | |
867 | { | |
12e41d03 DL |
868 | struct listnode *chnode; |
869 | struct listnode *chnextnode; | |
12e41d03 DL |
870 | struct pim_interface *pim_ifp; |
871 | struct pim_ifchannel *ch; | |
872 | ||
ea4a71fc DS |
873 | /* scan per-interface (S,G) state */ |
874 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
875 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
876 | if (!pim_ifp) |
877 | continue; | |
878 | ||
ea4a71fc DS |
879 | if (ch->upstream != up) |
880 | continue; | |
12e41d03 | 881 | |
ea4a71fc | 882 | pim_ifchannel_update_my_assert_metric(ch); |
12e41d03 | 883 | |
ea4a71fc | 884 | } /* scan iface channel list */ |
12e41d03 DL |
885 | } |
886 | ||
887 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up) | |
888 | { | |
12e41d03 DL |
889 | struct listnode *chnode; |
890 | struct listnode *chnextnode; | |
12e41d03 DL |
891 | struct pim_interface *pim_ifp; |
892 | struct pim_ifchannel *ch; | |
893 | ||
ea4a71fc DS |
894 | /* scan per-interface (S,G) state */ |
895 | for (ALL_LIST_ELEMENTS(pim_ifchannel_list, chnode, chnextnode, ch)) { | |
896 | pim_ifp = ch->interface->info; | |
12e41d03 DL |
897 | if (!pim_ifp) |
898 | continue; | |
899 | ||
ea4a71fc DS |
900 | if (ch->upstream != up) |
901 | continue; | |
12e41d03 | 902 | |
ea4a71fc | 903 | pim_ifchannel_update_assert_tracking_desired(ch); |
12e41d03 | 904 | |
ea4a71fc | 905 | } /* scan iface channel list */ |
12e41d03 | 906 | } |
f14248dd | 907 | |
1bf16443 | 908 | /* When kat is stopped CouldRegister goes to false so we need to |
909 | * transition the (S, G) on FHR to NI state and remove reg tunnel | |
910 | * from the OIL */ | |
911 | static void pim_upstream_fhr_kat_expiry(struct pim_upstream *up) | |
912 | { | |
913 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) | |
914 | return; | |
915 | ||
916 | if (PIM_DEBUG_TRACE) | |
8bfb8b67 DS |
917 | zlog_debug ("kat expired on %s; clear fhr reg state", up->sg_str); |
918 | ||
1bf16443 | 919 | /* stop reg-stop timer */ |
920 | THREAD_OFF(up->t_rs_timer); | |
921 | /* remove regiface from the OIL if it is there*/ | |
922 | pim_channel_del_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); | |
923 | /* move to "not-joined" */ | |
924 | up->join_state = PIM_UPSTREAM_NOTJOINED; | |
925 | PIM_UPSTREAM_FLAG_UNSET_FHR(up->flags); | |
926 | } | |
927 | ||
928 | /* When kat is started CouldRegister can go to true. And if it does we | |
929 | * need to transition the (S, G) on FHR to JOINED state and add reg tunnel | |
930 | * to the OIL */ | |
931 | static void pim_upstream_fhr_kat_start(struct pim_upstream *up) | |
932 | { | |
933 | if (pim_upstream_could_register(up)) { | |
934 | if (PIM_DEBUG_TRACE) | |
8bfb8b67 DS |
935 | zlog_debug ("kat started on %s; set fhr reg state to joined", up->sg_str); |
936 | ||
1bf16443 | 937 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); |
938 | if (up->join_state == PIM_UPSTREAM_NOTJOINED) { | |
939 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); | |
940 | up->join_state = PIM_UPSTREAM_JOINED; | |
941 | } | |
942 | } | |
943 | } | |
944 | ||
f14248dd DS |
945 | /* |
946 | * On an RP, the PMBR value must be cleared when the | |
947 | * Keepalive Timer expires | |
1bf16443 | 948 | * KAT expiry indicates that flow is inactive. If the flow was created or |
949 | * maintained by activity now is the time to deref it. | |
f14248dd DS |
950 | */ |
951 | static int | |
952 | pim_upstream_keep_alive_timer (struct thread *t) | |
953 | { | |
954 | struct pim_upstream *up; | |
955 | ||
956 | up = THREAD_ARG(t); | |
1bf16443 | 957 | up->t_ka_timer = NULL; |
f14248dd | 958 | |
4ed0af70 | 959 | if (I_am_RP (up->sg.grp)) |
1bf16443 | 960 | { |
961 | pim_br_clear_pmbr (&up->sg); | |
962 | /* | |
963 | * We need to do more here :) | |
964 | * But this is the start. | |
965 | */ | |
966 | } | |
14315ea8 | 967 | |
1bf16443 | 968 | /* source is no longer active - pull the SA from MSDP's cache */ |
969 | pim_msdp_sa_local_del(&up->sg); | |
14315ea8 | 970 | |
1bf16443 | 971 | /* if entry was created because of activity we need to deref it */ |
972 | if (PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) | |
973 | { | |
974 | pim_upstream_fhr_kat_expiry(up); | |
975 | if (PIM_DEBUG_TRACE) | |
8bfb8b67 | 976 | zlog_debug ("kat expired on %s; remove stream reference", up->sg_str); |
1bf16443 | 977 | PIM_UPSTREAM_FLAG_UNSET_SRC_STREAM(up->flags); |
978 | pim_upstream_del(up, __PRETTY_FUNCTION__); | |
979 | } | |
14315ea8 | 980 | |
1bf16443 | 981 | return 0; |
f14248dd DS |
982 | } |
983 | ||
f14248dd DS |
984 | void |
985 | pim_upstream_keep_alive_timer_start (struct pim_upstream *up, | |
986 | uint32_t time) | |
987 | { | |
1bf16443 | 988 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { |
989 | if (PIM_DEBUG_TRACE) | |
8bfb8b67 | 990 | zlog_debug ("kat start on %s with no stream reference", up->sg_str); |
1bf16443 | 991 | } |
00d2f9e4 | 992 | THREAD_OFF (up->t_ka_timer); |
f14248dd DS |
993 | THREAD_TIMER_ON (master, |
994 | up->t_ka_timer, | |
995 | pim_upstream_keep_alive_timer, | |
996 | up, time); | |
1bf16443 | 997 | |
998 | /* any time keepalive is started against a SG we will have to | |
999 | * re-evaluate our active source database */ | |
1000 | pim_msdp_sa_local_update(up); | |
1001 | } | |
1002 | ||
1003 | /* MSDP on RP needs to know if a source is registerable to this RP */ | |
1004 | static int | |
1005 | pim_upstream_msdp_reg_timer(struct thread *t) | |
1006 | { | |
1007 | struct pim_upstream *up; | |
1008 | ||
1009 | up = THREAD_ARG(t); | |
1010 | up->t_msdp_reg_timer = NULL; | |
1011 | ||
1012 | /* source is no longer active - pull the SA from MSDP's cache */ | |
1013 | pim_msdp_sa_local_del(&up->sg); | |
1014 | return 1; | |
1015 | } | |
1016 | void | |
1017 | pim_upstream_msdp_reg_timer_start(struct pim_upstream *up) | |
1018 | { | |
1019 | THREAD_OFF(up->t_msdp_reg_timer); | |
1020 | THREAD_TIMER_ON(master, up->t_msdp_reg_timer, | |
1021 | pim_upstream_msdp_reg_timer, up, PIM_MSDP_REG_RXED_PERIOD); | |
1022 | ||
1023 | pim_msdp_sa_local_update(up); | |
f14248dd | 1024 | } |
cb40b272 DS |
1025 | |
1026 | /* | |
1027 | * 4.2.1 Last-Hop Switchover to the SPT | |
1028 | * | |
1029 | * In Sparse-Mode PIM, last-hop routers join the shared tree towards the | |
1030 | * RP. Once traffic from sources to joined groups arrives at a last-hop | |
1031 | * router, it has the option of switching to receive the traffic on a | |
1032 | * shortest path tree (SPT). | |
1033 | * | |
1034 | * The decision for a router to switch to the SPT is controlled as | |
1035 | * follows: | |
1036 | * | |
1037 | * void | |
1038 | * CheckSwitchToSpt(S,G) { | |
1039 | * if ( ( pim_include(*,G) (-) pim_exclude(S,G) | |
1040 | * (+) pim_include(S,G) != NULL ) | |
1041 | * AND SwitchToSptDesired(S,G) ) { | |
1042 | * # Note: Restarting the KAT will result in the SPT switch | |
1043 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1044 | * } | |
1045 | * } | |
1046 | * | |
1047 | * SwitchToSptDesired(S,G) is a policy function that is implementation | |
1048 | * defined. An "infinite threshold" policy can be implemented by making | |
1049 | * SwitchToSptDesired(S,G) return false all the time. A "switch on | |
1050 | * first packet" policy can be implemented by making | |
1051 | * SwitchToSptDesired(S,G) return true once a single packet has been | |
1052 | * received for the source and group. | |
1053 | */ | |
1054 | int | |
4ed0af70 | 1055 | pim_upstream_switch_to_spt_desired (struct prefix_sg *sg) |
cb40b272 | 1056 | { |
4ed0af70 | 1057 | if (I_am_RP (sg->grp)) |
a3b58b4a DS |
1058 | return 1; |
1059 | ||
cb40b272 DS |
1060 | return 0; |
1061 | } | |
d7259eac | 1062 | |
80d9c3a0 DS |
1063 | int |
1064 | pim_upstream_is_sg_rpt (struct pim_upstream *up) | |
1065 | { | |
f21597f0 DS |
1066 | struct listnode *chnode; |
1067 | struct pim_ifchannel *ch; | |
1068 | ||
1069 | for (ALL_LIST_ELEMENTS_RO(pim_ifchannel_list, chnode, ch)) | |
1070 | { | |
1071 | if ((ch->upstream == up) && | |
1072 | (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags))) | |
1073 | return 1; | |
1074 | } | |
e43b8697 | 1075 | |
80d9c3a0 DS |
1076 | return 0; |
1077 | } | |
3a66b17b DS |
1078 | /* |
1079 | * After receiving a packet set SPTbit: | |
1080 | * void | |
1081 | * Update_SPTbit(S,G,iif) { | |
1082 | * if ( iif == RPF_interface(S) | |
1083 | * AND JoinDesired(S,G) == TRUE | |
1084 | * AND ( DirectlyConnected(S) == TRUE | |
1085 | * OR RPF_interface(S) != RPF_interface(RP(G)) | |
1086 | * OR inherited_olist(S,G,rpt) == NULL | |
1087 | * OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1088 | * ( RPF'(S,G) != NULL ) ) | |
1089 | * OR ( I_Am_Assert_Loser(S,G,iif) ) { | |
1090 | * Set SPTbit(S,G) to TRUE | |
1091 | * } | |
1092 | * } | |
1093 | */ | |
1094 | void | |
1095 | pim_upstream_set_sptbit (struct pim_upstream *up, struct interface *incoming) | |
1096 | { | |
1097 | struct pim_rpf *grpf = NULL; | |
1098 | ||
1099 | // iif == RPF_interfvace(S) | |
1100 | if (up->rpf.source_nexthop.interface != incoming) | |
1101 | { | |
1102 | if (PIM_DEBUG_TRACE) | |
1103 | zlog_debug ("%s: Incoming Interface: %s is different than RPF_interface(S) %s", | |
1104 | __PRETTY_FUNCTION__, incoming->name, up->rpf.source_nexthop.interface->name); | |
1105 | return; | |
1106 | } | |
1107 | ||
1108 | // AND JoinDesired(S,G) == TRUE | |
1109 | // FIXME | |
1110 | ||
1111 | // DirectlyConnected(S) == TRUE | |
1112 | if (pim_if_connected_to_source (up->rpf.source_nexthop.interface, up->sg.src)) | |
1113 | { | |
1114 | if (PIM_DEBUG_TRACE) | |
1115 | zlog_debug ("%s: %s is directly connected to the source", __PRETTY_FUNCTION__, | |
8bfb8b67 | 1116 | up->sg_str); |
3a66b17b DS |
1117 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; |
1118 | return; | |
1119 | } | |
1120 | ||
1121 | // OR RPF_interface(S) != RPF_interface(RP(G)) | |
1122 | grpf = RP(up->sg.grp); | |
1123 | if (!grpf || up->rpf.source_nexthop.interface != grpf->source_nexthop.interface) | |
1124 | { | |
1125 | if (PIM_DEBUG_TRACE) | |
1126 | zlog_debug ("%s: %s RPF_interface(S) != RPF_interface(RP(G))", | |
8bfb8b67 | 1127 | __PRETTY_FUNCTION__, up->sg_str); |
3a66b17b DS |
1128 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; |
1129 | return; | |
1130 | } | |
1131 | ||
1132 | // OR inherited_olist(S,G,rpt) == NULL | |
1133 | if (pim_upstream_is_sg_rpt(up) && pim_upstream_empty_inherited_olist(up)) | |
1134 | { | |
1135 | if (PIM_DEBUG_TRACE) | |
1136 | zlog_debug ("%s: %s OR inherited_olist(S,G,rpt) == NULL", __PRETTY_FUNCTION__, | |
8bfb8b67 | 1137 | up->sg_str); |
3a66b17b DS |
1138 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; |
1139 | return; | |
1140 | } | |
1141 | ||
1142 | // OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1143 | // ( RPF'(S,G) != NULL ) ) | |
1144 | if (up->parent && pim_rpf_is_same (&up->rpf, &up->parent->rpf)) | |
1145 | { | |
1146 | if (PIM_DEBUG_TRACE) | |
1147 | zlog_debug ("%s: %s RPF'(S,G) is the same as RPF'(*,G)", __PRETTY_FUNCTION__, | |
8bfb8b67 | 1148 | up->sg_str); |
3a66b17b DS |
1149 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; |
1150 | return; | |
1151 | } | |
1152 | ||
1153 | return; | |
1154 | } | |
80d9c3a0 | 1155 | |
d7259eac | 1156 | const char * |
c9802954 | 1157 | pim_upstream_state2str (enum pim_upstream_state join_state) |
d7259eac | 1158 | { |
c9802954 | 1159 | switch (join_state) |
d7259eac DS |
1160 | { |
1161 | case PIM_UPSTREAM_NOTJOINED: | |
e775c0a4 | 1162 | return "NotJoined"; |
d7259eac DS |
1163 | break; |
1164 | case PIM_UPSTREAM_JOINED: | |
e775c0a4 | 1165 | return "Joined"; |
d7259eac DS |
1166 | break; |
1167 | case PIM_UPSTREAM_JOIN_PENDING: | |
e775c0a4 | 1168 | return "JoinPending"; |
d7259eac DS |
1169 | break; |
1170 | case PIM_UPSTREAM_PRUNE: | |
1171 | return "Prune"; | |
1172 | break; | |
1173 | } | |
e775c0a4 | 1174 | return "Unknown"; |
d7259eac | 1175 | } |
627ed2a3 DS |
1176 | |
1177 | static int | |
1178 | pim_upstream_register_stop_timer (struct thread *t) | |
1179 | { | |
4df01a4e | 1180 | struct pim_interface *pim_ifp; |
627ed2a3 DS |
1181 | struct pim_upstream *up; |
1182 | struct pim_rpf *rpg; | |
1183 | struct ip ip_hdr; | |
627ed2a3 DS |
1184 | up = THREAD_ARG (t); |
1185 | ||
1186 | up->t_rs_timer = NULL; | |
1187 | ||
1188 | if (PIM_DEBUG_TRACE) | |
1189 | { | |
d5ed8a9c | 1190 | zlog_debug ("%s: (S,G)=%s upstream register stop timer %s", |
8bfb8b67 | 1191 | __PRETTY_FUNCTION__, up->sg_str, |
c9802954 | 1192 | pim_upstream_state2str(up->join_state)); |
627ed2a3 DS |
1193 | } |
1194 | ||
1195 | switch (up->join_state) | |
1196 | { | |
1197 | case PIM_UPSTREAM_JOIN_PENDING: | |
1198 | up->join_state = PIM_UPSTREAM_JOINED; | |
bb027ee8 DS |
1199 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); |
1200 | break; | |
1201 | case PIM_UPSTREAM_JOINED: | |
627ed2a3 DS |
1202 | break; |
1203 | case PIM_UPSTREAM_PRUNE: | |
4df01a4e | 1204 | pim_ifp = up->rpf.source_nexthop.interface->info; |
7ef66046 DS |
1205 | if (!pim_ifp) |
1206 | { | |
1207 | if (PIM_DEBUG_TRACE) | |
1208 | zlog_debug ("%s: Interface: %s is not configured for pim", | |
1209 | __PRETTY_FUNCTION__, up->rpf.source_nexthop.interface->name); | |
1210 | return 0; | |
1211 | } | |
627ed2a3 DS |
1212 | up->join_state = PIM_UPSTREAM_JOIN_PENDING; |
1213 | pim_upstream_start_register_stop_timer (up, 1); | |
1214 | ||
70e7fda8 DS |
1215 | if (((up->channel_oil->cc.lastused/100) > PIM_KEEPALIVE_PERIOD) && |
1216 | (I_am_RP (up->sg.grp))) | |
1217 | { | |
1218 | if (PIM_DEBUG_TRACE) | |
1219 | zlog_debug ("%s: Stop sending the register, because I am the RP and we haven't seen a packet in a while", __PRETTY_FUNCTION__); | |
1220 | return 0; | |
1221 | } | |
4ed0af70 | 1222 | rpg = RP (up->sg.grp); |
627ed2a3 DS |
1223 | memset (&ip_hdr, 0, sizeof (struct ip)); |
1224 | ip_hdr.ip_p = PIM_IP_PROTO_PIM; | |
1225 | ip_hdr.ip_hl = 5; | |
1226 | ip_hdr.ip_v = 4; | |
4ed0af70 DS |
1227 | ip_hdr.ip_src = up->sg.src; |
1228 | ip_hdr.ip_dst = up->sg.grp; | |
dc686f82 | 1229 | ip_hdr.ip_len = htons (20); |
627ed2a3 | 1230 | // checksum is broken |
4df01a4e | 1231 | pim_register_send ((uint8_t *)&ip_hdr, sizeof (struct ip), |
0e3b3d5d | 1232 | pim_ifp->primary_address, rpg, 1, up); |
627ed2a3 DS |
1233 | break; |
1234 | default: | |
1235 | break; | |
1236 | } | |
1237 | ||
1238 | return 0; | |
1239 | } | |
1240 | ||
1241 | void | |
1242 | pim_upstream_start_register_stop_timer (struct pim_upstream *up, int null_register) | |
1243 | { | |
1244 | uint32_t time; | |
1245 | ||
1246 | if (up->t_rs_timer) | |
1247 | { | |
1248 | THREAD_TIMER_OFF (up->t_rs_timer); | |
1249 | up->t_rs_timer = NULL; | |
1250 | } | |
1251 | ||
1252 | if (!null_register) | |
1253 | { | |
1254 | uint32_t lower = (0.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1255 | uint32_t upper = (1.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1256 | time = lower + (random () % (upper - lower + 1)) - PIM_REGISTER_PROBE_PERIOD; | |
1257 | } | |
1258 | else | |
1259 | time = PIM_REGISTER_PROBE_PERIOD; | |
1260 | ||
1261 | if (PIM_DEBUG_TRACE) | |
1262 | { | |
05e451f8 | 1263 | zlog_debug ("%s: (S,G)=%s Starting upstream register stop timer %d", |
8bfb8b67 | 1264 | __PRETTY_FUNCTION__, up->sg_str, time); |
627ed2a3 DS |
1265 | } |
1266 | THREAD_TIMER_ON (master, up->t_rs_timer, | |
1267 | pim_upstream_register_stop_timer, | |
1268 | up, time); | |
1269 | } | |
4fdc8f36 DS |
1270 | |
1271 | /* | |
1272 | * For a given upstream, determine the inherited_olist | |
1273 | * and apply it. | |
219e0013 DS |
1274 | * |
1275 | * inherited_olist(S,G,rpt) = | |
1276 | * ( joins(*,*,RP(G)) (+) joins(*,G) (-) prunes(S,G,rpt) ) | |
1277 | * (+) ( pim_include(*,G) (-) pim_exclude(S,G)) | |
1278 | * (-) ( lost_assert(*,G) (+) lost_assert(S,G,rpt) ) | |
1279 | * | |
1280 | * inherited_olist(S,G) = | |
1281 | * inherited_olist(S,G,rpt) (+) | |
1282 | * joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
1283 | * | |
4fdc8f36 DS |
1284 | * return 1 if there are any output interfaces |
1285 | * return 0 if there are not any output interfaces | |
1286 | */ | |
1287 | int | |
1288 | pim_upstream_inherited_olist (struct pim_upstream *up) | |
1289 | { | |
219e0013 | 1290 | struct pim_interface *pim_ifp; |
219e0013 DS |
1291 | struct listnode *chnextnode; |
1292 | struct pim_ifchannel *ch; | |
1293 | struct listnode *chnode; | |
219e0013 DS |
1294 | int output_intf = 0; |
1295 | ||
3667b0bc | 1296 | pim_ifp = up->rpf.source_nexthop.interface->info; |
da55afba | 1297 | if (pim_ifp && !up->channel_oil) |
3667b0bc | 1298 | up->channel_oil = pim_channel_oil_add (&up->sg, pim_ifp->mroute_vif_index); |
219e0013 | 1299 | |
ea4a71fc | 1300 | for (ALL_LIST_ELEMENTS (pim_ifchannel_list, chnode, chnextnode, ch)) |
219e0013 | 1301 | { |
ea4a71fc | 1302 | pim_ifp = ch->interface->info; |
7a3ddda5 DS |
1303 | if (!pim_ifp) |
1304 | continue; | |
219e0013 | 1305 | |
ea4a71fc | 1306 | if (pim_upstream_evaluate_join_desired_interface (up, ch)) |
7a3ddda5 | 1307 | { |
ea4a71fc DS |
1308 | pim_channel_add_oif (up->channel_oil, ch->interface, PIM_OIF_FLAG_PROTO_PIM); |
1309 | output_intf++; | |
219e0013 DS |
1310 | } |
1311 | } | |
1312 | ||
483eef9d DS |
1313 | /* |
1314 | * If we have output_intf switch state to Join and work like normal | |
1315 | * If we don't have an output_intf that means we are probably a | |
1316 | * switch on a stick so turn on forwarding to just accept the | |
1317 | * incoming packets so we don't bother the other stuff! | |
1318 | */ | |
1319 | if (output_intf) | |
1320 | pim_upstream_switch (up, PIM_UPSTREAM_JOINED); | |
1321 | else | |
1322 | forward_on (up); | |
219e0013 DS |
1323 | |
1324 | return output_intf; | |
4fdc8f36 | 1325 | } |
d3dd1804 | 1326 | |
80d9c3a0 DS |
1327 | int |
1328 | pim_upstream_empty_inherited_olist (struct pim_upstream *up) | |
1329 | { | |
ce0ddb4e | 1330 | return pim_channel_oil_empty (up->channel_oil); |
80d9c3a0 DS |
1331 | } |
1332 | ||
d3dd1804 DS |
1333 | /* |
1334 | * When we have a new neighbor, | |
1335 | * find upstreams that don't have their rpf_addr | |
1336 | * set and see if the new neighbor allows | |
1337 | * the join to be sent | |
1338 | */ | |
1339 | void | |
1340 | pim_upstream_find_new_rpf (void) | |
1341 | { | |
1342 | struct listnode *up_node; | |
1343 | struct listnode *up_nextnode; | |
1344 | struct pim_upstream *up; | |
1345 | ||
1346 | /* | |
0f588989 DS |
1347 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr |
1348 | */ | |
1349 | for (ALL_LIST_ELEMENTS(pim_upstream_list, up_node, up_nextnode, up)) | |
d3dd1804 | 1350 | { |
63c59d0c | 1351 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) |
d3dd1804 | 1352 | { |
3197cb1e | 1353 | if (PIM_DEBUG_TRACE) |
d3dd1804 | 1354 | zlog_debug ("Upstream %s without a path to send join, checking", |
8bfb8b67 | 1355 | up->sg_str); |
d3dd1804 DS |
1356 | pim_rpf_update (up, NULL); |
1357 | } | |
1358 | } | |
1359 | } | |
0f588989 | 1360 | |
0f588989 DS |
1361 | static unsigned int |
1362 | pim_upstream_hash_key (void *arg) | |
1363 | { | |
1364 | struct pim_upstream *up = (struct pim_upstream *)arg; | |
1365 | ||
1366 | return jhash_2words (up->sg.src.s_addr, up->sg.grp.s_addr, 0); | |
1367 | } | |
1368 | ||
1369 | void pim_upstream_terminate (void) | |
1370 | { | |
1371 | if (pim_upstream_list) | |
1372 | list_free (pim_upstream_list); | |
1373 | pim_upstream_list = NULL; | |
1374 | ||
1375 | if (pim_upstream_hash) | |
1376 | hash_free (pim_upstream_hash); | |
1377 | } | |
1378 | ||
1379 | static int | |
1380 | pim_upstream_equal (const void *arg1, const void *arg2) | |
1381 | { | |
1382 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; | |
1383 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
1384 | ||
1385 | if ((up1->sg.grp.s_addr == up2->sg.grp.s_addr) && | |
1386 | (up1->sg.src.s_addr == up2->sg.src.s_addr)) | |
1387 | return 1; | |
1388 | ||
1389 | return 0; | |
1390 | } | |
1391 | ||
1bf16443 | 1392 | /* rfc4601:section-4.2:"Data Packet Forwarding Rules" defines |
1393 | * the cases where kat has to be restarted on rxing traffic - | |
1394 | * | |
1395 | * if( DirectlyConnected(S) == TRUE AND iif == RPF_interface(S) ) { | |
1396 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1397 | * # Note: a register state transition or UpstreamJPState(S,G) | |
1398 | * # transition may happen as a result of restarting | |
1399 | * # KeepaliveTimer, and must be dealt with here. | |
1400 | * } | |
1401 | * if( iif == RPF_interface(S) AND UpstreamJPState(S,G) == Joined AND | |
1402 | * inherited_olist(S,G) != NULL ) { | |
1403 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1404 | * } | |
1405 | */ | |
1406 | static bool pim_upstream_kat_start_ok(struct pim_upstream *up) | |
1407 | { | |
1408 | /* "iif == RPF_interface(S)" check has to be done by the kernel or hw | |
1409 | * so we will skip that here */ | |
1410 | if (pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
1411 | up->sg.src)) { | |
1412 | return true; | |
1413 | } | |
1414 | ||
1415 | if ((up->join_state == PIM_UPSTREAM_JOINED) && | |
1416 | !pim_upstream_empty_inherited_olist(up)) { | |
1417 | /* XXX: I have added this RP check just for 3.2 and it's a digression from | |
1418 | * what rfc-4601 says. Till now we were only running KAT on FHR and RP and | |
1419 | * there is some angst around making the change to run it all routers that | |
1420 | * maintain the (S, G) state. This is tracked via CM-13601 and MUST be | |
1421 | * removed to handle spt turn-arounds correctly in a 3-tier clos */ | |
1422 | if (I_am_RP (up->sg.grp)) | |
1423 | return true; | |
1424 | } | |
1425 | ||
1426 | return false; | |
1427 | } | |
1428 | ||
9c5e4d62 DS |
1429 | /* |
1430 | * Code to check and see if we've received packets on a S,G mroute | |
1431 | * and if so to set the SPT bit appropriately | |
1432 | */ | |
1433 | static void | |
1434 | pim_upstream_sg_running (void *arg) | |
1435 | { | |
1436 | struct pim_upstream *up = (struct pim_upstream *)arg; | |
e43b8697 DS |
1437 | |
1438 | // No packet can have arrived here if this is the case | |
1439 | if (!up->channel_oil || !up->channel_oil->installed) | |
1440 | { | |
1441 | if (PIM_DEBUG_TRACE) | |
1442 | zlog_debug ("%s: %s is not installed in mroute", | |
8bfb8b67 | 1443 | __PRETTY_FUNCTION__, up->sg_str); |
e43b8697 DS |
1444 | return; |
1445 | } | |
1446 | ||
e43b8697 DS |
1447 | |
1448 | pim_mroute_update_counters (up->channel_oil); | |
1449 | ||
1450 | // Have we seen packets? | |
1bf16443 | 1451 | if ((up->channel_oil->cc.oldpktcnt >= up->channel_oil->cc.pktcnt) && |
e43b8697 DS |
1452 | (up->channel_oil->cc.lastused/100 > 30)) |
1453 | { | |
1454 | if (PIM_DEBUG_TRACE) | |
1455 | { | |
eeedae06 DS |
1456 | zlog_debug ("%s: %s old packet count is equal or lastused is greater than 30, (%ld,%ld,%lld)", |
1457 | __PRETTY_FUNCTION__, up->sg_str, | |
1458 | up->channel_oil->cc.oldpktcnt, | |
1459 | up->channel_oil->cc.pktcnt, | |
1460 | up->channel_oil->cc.lastused/100); | |
e43b8697 DS |
1461 | } |
1462 | return; | |
1463 | } | |
1464 | ||
1bf16443 | 1465 | if (pim_upstream_kat_start_ok(up)) { |
1466 | /* Add a source reference to the stream if | |
1467 | * one doesn't already exist */ | |
1468 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) | |
1469 | { | |
1470 | if (PIM_DEBUG_TRACE) | |
8bfb8b67 DS |
1471 | zlog_debug ("source reference created on kat restart %s", up->sg_str); |
1472 | ||
1bf16443 | 1473 | pim_upstream_ref(up, PIM_UPSTREAM_FLAG_MASK_SRC_STREAM); |
1474 | PIM_UPSTREAM_FLAG_SET_SRC_STREAM(up->flags); | |
1475 | pim_upstream_fhr_kat_start(up); | |
1476 | } | |
1477 | pim_upstream_keep_alive_timer_start(up, qpim_keep_alive_time); | |
1478 | } | |
1479 | ||
1480 | if (up->sptbit != PIM_UPSTREAM_SPTBIT_TRUE) | |
1481 | { | |
1482 | pim_upstream_set_sptbit(up, up->rpf.source_nexthop.interface); | |
1483 | } | |
e43b8697 | 1484 | return; |
9c5e4d62 DS |
1485 | } |
1486 | ||
040d86ad DS |
1487 | void |
1488 | pim_upstream_init (void) | |
0f588989 | 1489 | { |
9c5e4d62 DS |
1490 | pim_upstream_sg_wheel = wheel_init (master, 31000, 100, |
1491 | pim_upstream_hash_key, | |
1492 | pim_upstream_sg_running); | |
0f588989 DS |
1493 | pim_upstream_hash = hash_create_size (8192, pim_upstream_hash_key, |
1494 | pim_upstream_equal); | |
1495 | ||
1496 | pim_upstream_list = list_new (); | |
1497 | pim_upstream_list->del = (void (*)(void *)) pim_upstream_free; | |
03417ccd | 1498 | pim_upstream_list->cmp = pim_upstream_compare; |
0f588989 DS |
1499 | |
1500 | } |