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Commit | Line | Data |
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12e41d03 | 1 | /* |
896014f4 DL |
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 along | |
16 | * with this program; see the file COPYING; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
18 | */ | |
12e41d03 DL |
19 | |
20 | #include <zebra.h> | |
21 | ||
22 | #include "zebra/rib.h" | |
23 | ||
24 | #include "log.h" | |
25 | #include "zclient.h" | |
26 | #include "memory.h" | |
27 | #include "thread.h" | |
28 | #include "linklist.h" | |
dfe43e25 DW |
29 | #include "vty.h" |
30 | #include "plist.h" | |
0f588989 DS |
31 | #include "hash.h" |
32 | #include "jhash.h" | |
9c5e4d62 | 33 | #include "wheel.h" |
12e41d03 DL |
34 | |
35 | #include "pimd.h" | |
36 | #include "pim_pim.h" | |
37 | #include "pim_str.h" | |
38 | #include "pim_time.h" | |
39 | #include "pim_iface.h" | |
40 | #include "pim_join.h" | |
41 | #include "pim_zlookup.h" | |
42 | #include "pim_upstream.h" | |
43 | #include "pim_ifchannel.h" | |
44 | #include "pim_neighbor.h" | |
45 | #include "pim_rpf.h" | |
46 | #include "pim_zebra.h" | |
47 | #include "pim_oil.h" | |
48 | #include "pim_macro.h" | |
8f5f5e91 | 49 | #include "pim_rp.h" |
f14248dd | 50 | #include "pim_br.h" |
627ed2a3 | 51 | #include "pim_register.h" |
3c72d654 | 52 | #include "pim_msdp.h" |
982bff89 | 53 | #include "pim_jp_agg.h" |
1bc98276 | 54 | #include "pim_nht.h" |
15a5dafe | 55 | #include "pim_ssm.h" |
12e41d03 | 56 | |
0f588989 DS |
57 | struct hash *pim_upstream_hash = NULL; |
58 | struct list *pim_upstream_list = NULL; | |
9c5e4d62 | 59 | struct timer_wheel *pim_upstream_sg_wheel = NULL; |
0f588989 | 60 | |
982bff89 | 61 | static void join_timer_stop(struct pim_upstream *up); |
12e41d03 DL |
62 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up); |
63 | ||
cfa91a87 DS |
64 | /* |
65 | * A (*,G) or a (*,*) is going away | |
66 | * remove the parent pointer from | |
67 | * those pointing at us | |
68 | */ | |
69 | static void | |
70 | pim_upstream_remove_children (struct pim_upstream *up) | |
71 | { | |
cfa91a87 DS |
72 | struct pim_upstream *child; |
73 | ||
03417ccd | 74 | if (!up->sources) |
cfa91a87 DS |
75 | return; |
76 | ||
03417ccd | 77 | while (!list_isempty (up->sources)) |
cfa91a87 | 78 | { |
03417ccd | 79 | child = listnode_head (up->sources); |
03417ccd | 80 | listnode_delete (up->sources, child); |
55785900 CS |
81 | if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(child->flags)) |
82 | { | |
83 | PIM_UPSTREAM_FLAG_UNSET_SRC_LHR(child->flags); | |
84 | child = pim_upstream_del(child, __PRETTY_FUNCTION__); | |
85 | } | |
86 | if (child) | |
87 | child->parent = NULL; | |
cfa91a87 | 88 | } |
55785900 CS |
89 | list_delete(up->sources); |
90 | up->sources = NULL; | |
cfa91a87 DS |
91 | } |
92 | ||
93 | /* | |
94 | * A (*,G) or a (*,*) is being created | |
95 | * Find the children that would point | |
96 | * at us. | |
97 | */ | |
98 | static void | |
99 | pim_upstream_find_new_children (struct pim_upstream *up) | |
100 | { | |
101 | struct pim_upstream *child; | |
102 | struct listnode *ch_node; | |
103 | ||
4ed0af70 DS |
104 | if ((up->sg.src.s_addr != INADDR_ANY) && |
105 | (up->sg.grp.s_addr != INADDR_ANY)) | |
cfa91a87 DS |
106 | return; |
107 | ||
4ed0af70 DS |
108 | if ((up->sg.src.s_addr == INADDR_ANY) && |
109 | (up->sg.grp.s_addr == INADDR_ANY)) | |
cfa91a87 DS |
110 | return; |
111 | ||
0f588989 | 112 | for (ALL_LIST_ELEMENTS_RO (pim_upstream_list, ch_node, child)) |
cfa91a87 | 113 | { |
4ed0af70 | 114 | if ((up->sg.grp.s_addr != INADDR_ANY) && |
0f588989 | 115 | (child->sg.grp.s_addr == up->sg.grp.s_addr) && |
cfa91a87 | 116 | (child != up)) |
03417ccd DS |
117 | { |
118 | child->parent = up; | |
119 | listnode_add_sort (up->sources, child); | |
120 | } | |
cfa91a87 DS |
121 | } |
122 | } | |
123 | ||
4d99418b DS |
124 | /* |
125 | * If we have a (*,*) || (S,*) there is no parent | |
126 | * If we have a (S,G), find the (*,G) | |
127 | * If we have a (*,G), find the (*,*) | |
128 | */ | |
129 | static struct pim_upstream * | |
03417ccd | 130 | pim_upstream_find_parent (struct pim_upstream *child) |
4d99418b | 131 | { |
03417ccd DS |
132 | struct prefix_sg any = child->sg; |
133 | struct pim_upstream *up = NULL; | |
4d99418b DS |
134 | |
135 | // (S,G) | |
03417ccd DS |
136 | if ((child->sg.src.s_addr != INADDR_ANY) && |
137 | (child->sg.grp.s_addr != INADDR_ANY)) | |
4d99418b | 138 | { |
4ed0af70 | 139 | any.src.s_addr = INADDR_ANY; |
03417ccd DS |
140 | up = pim_upstream_find (&any); |
141 | ||
142 | if (up) | |
143 | listnode_add (up->sources, child); | |
144 | ||
145 | return up; | |
4d99418b DS |
146 | } |
147 | ||
03417ccd | 148 | return NULL; |
4d99418b DS |
149 | } |
150 | ||
12e41d03 DL |
151 | void pim_upstream_free(struct pim_upstream *up) |
152 | { | |
153 | XFREE(MTYPE_PIM_UPSTREAM, up); | |
1bc98276 | 154 | up = NULL; |
12e41d03 DL |
155 | } |
156 | ||
157 | static void upstream_channel_oil_detach(struct pim_upstream *up) | |
158 | { | |
55785900 CS |
159 | if (up->channel_oil) |
160 | { | |
161 | /* Detaching from channel_oil, channel_oil may exist post del, | |
162 | but upstream would not keep reference of it | |
163 | */ | |
164 | pim_channel_oil_del(up->channel_oil); | |
165 | up->channel_oil = NULL; | |
166 | } | |
12e41d03 DL |
167 | } |
168 | ||
d0db90bf | 169 | struct pim_upstream * |
e5905a3b | 170 | pim_upstream_del(struct pim_upstream *up, const char *name) |
12e41d03 | 171 | { |
7667c556 | 172 | bool notify_msdp = false; |
1bc98276 | 173 | struct prefix nht_p; |
7667c556 | 174 | |
3197cb1e | 175 | if (PIM_DEBUG_TRACE) |
815c33c9 | 176 | zlog_debug ("%s(%s): Delete %s ref count: %d , flags: %d c_oil ref count %d (Pre decrement)", |
55785900 | 177 | __PRETTY_FUNCTION__, name, up->sg_str, up->ref_count, up->flags, |
815c33c9 | 178 | up->channel_oil->oil_ref_count); |
3197cb1e | 179 | |
e5905a3b DS |
180 | --up->ref_count; |
181 | ||
182 | if (up->ref_count >= 1) | |
d0db90bf | 183 | return up; |
e5905a3b | 184 | |
f14248dd | 185 | THREAD_OFF(up->t_ka_timer); |
792f4d29 | 186 | THREAD_OFF(up->t_rs_timer); |
1bf16443 | 187 | THREAD_OFF(up->t_msdp_reg_timer); |
12e41d03 | 188 | |
7667c556 | 189 | if (up->join_state == PIM_UPSTREAM_JOINED) { |
982bff89 DS |
190 | pim_jp_agg_single_upstream_send (&up->rpf, up, 0); |
191 | ||
7667c556 | 192 | if (up->sg.src.s_addr == INADDR_ANY) { |
193 | /* if a (*, G) entry in the joined state is being deleted we | |
194 | * need to notify MSDP */ | |
195 | notify_msdp = true; | |
196 | } | |
197 | } | |
198 | ||
fc9d070d | 199 | join_timer_stop(up); |
06e12762 | 200 | pim_jp_agg_upstream_verification (up, false); |
fc9d070d DS |
201 | up->rpf.source_nexthop.interface = NULL; |
202 | ||
36e466fe | 203 | if (up->sg.src.s_addr != INADDR_ANY) { |
9c5e4d62 | 204 | wheel_remove_item (pim_upstream_sg_wheel, up); |
36e466fe | 205 | notify_msdp = true; |
206 | } | |
9c5e4d62 | 207 | |
cfa91a87 | 208 | pim_upstream_remove_children (up); |
03417ccd | 209 | if (up->sources) |
55785900 | 210 | list_delete (up->sources); |
03417ccd | 211 | up->sources = NULL; |
55785900 CS |
212 | pim_mroute_del (up->channel_oil, __PRETTY_FUNCTION__); |
213 | upstream_channel_oil_detach(up); | |
03417ccd | 214 | |
2a28f7a0 | 215 | list_delete (up->ifchannels); |
4ba87bb9 | 216 | up->ifchannels = NULL; |
2a28f7a0 | 217 | |
12e41d03 DL |
218 | /* |
219 | notice that listnode_delete() can't be moved | |
220 | into pim_upstream_free() because the later is | |
221 | called by list_delete_all_node() | |
222 | */ | |
55785900 CS |
223 | if (up->parent && up->parent->sources) |
224 | listnode_delete (up->parent->sources, up); | |
225 | up->parent = NULL; | |
226 | ||
0f588989 DS |
227 | listnode_delete (pim_upstream_list, up); |
228 | hash_release (pim_upstream_hash, up); | |
12e41d03 | 229 | |
1bc98276 CS |
230 | if (notify_msdp) |
231 | { | |
232 | pim_msdp_up_del (&up->sg); | |
233 | } | |
234 | ||
235 | /* Deregister addr with Zebra NHT */ | |
236 | nht_p.family = AF_INET; | |
237 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
238 | nht_p.u.prefix4 = up->upstream_addr; | |
239 | if (PIM_DEBUG_TRACE) | |
240 | { | |
241 | char buf[PREFIX2STR_BUFFER]; | |
242 | prefix2str (&nht_p, buf, sizeof (buf)); | |
4ba87bb9 | 243 | zlog_debug ("%s: Deregister upstream %s addr %s with Zebra NHT", |
633988a7 | 244 | __PRETTY_FUNCTION__, up->sg_str, buf); |
1bc98276 CS |
245 | } |
246 | pim_delete_tracked_nexthop (&nht_p, up, NULL); | |
247 | ||
248 | pim_upstream_free (up); | |
d0db90bf DS |
249 | |
250 | return NULL; | |
12e41d03 DL |
251 | } |
252 | ||
56638739 DS |
253 | void |
254 | pim_upstream_send_join (struct pim_upstream *up) | |
12e41d03 | 255 | { |
3197cb1e | 256 | if (PIM_DEBUG_TRACE) { |
eaa54bdb | 257 | char rpf_str[PREFIX_STRLEN]; |
63c59d0c | 258 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_str, sizeof(rpf_str)); |
05e451f8 | 259 | zlog_debug ("%s: RPF'%s=%s(%s) for Interface %s", __PRETTY_FUNCTION__, |
8bfb8b67 | 260 | up->sg_str, rpf_str, pim_upstream_state2str (up->join_state), |
56638739 | 261 | up->rpf.source_nexthop.interface->name); |
63c59d0c | 262 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { |
05e451f8 | 263 | zlog_debug("%s: can't send join upstream: RPF'%s=%s", |
56638739 | 264 | __PRETTY_FUNCTION__, |
8bfb8b67 | 265 | up->sg_str, rpf_str); |
12e41d03 DL |
266 | /* warning only */ |
267 | } | |
268 | } | |
56638739 | 269 | |
12e41d03 | 270 | /* send Join(S,G) to the current upstream neighbor */ |
982bff89 | 271 | pim_jp_agg_single_upstream_send(&up->rpf, up, 1 /* join */); |
12e41d03 DL |
272 | } |
273 | ||
274 | static int on_join_timer(struct thread *t) | |
275 | { | |
276 | struct pim_upstream *up; | |
277 | ||
12e41d03 | 278 | up = THREAD_ARG(t); |
12e41d03 | 279 | |
bb6e291f DS |
280 | /* |
281 | * In the case of a HFR we will not ahve anyone to send this to. | |
282 | */ | |
0bf27c5c | 283 | if (PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) |
bb6e291f DS |
284 | return 0; |
285 | ||
eb345962 DS |
286 | /* |
287 | * Don't send the join if the outgoing interface is a loopback | |
288 | * But since this might change leave the join timer running | |
289 | */ | |
fc9d070d DS |
290 | if (up->rpf.source_nexthop.interface && |
291 | !if_is_loopback (up->rpf.source_nexthop.interface)) | |
eb345962 | 292 | pim_upstream_send_join (up); |
12e41d03 | 293 | |
12e41d03 DL |
294 | join_timer_start(up); |
295 | ||
296 | return 0; | |
297 | } | |
298 | ||
982bff89 | 299 | static void join_timer_stop(struct pim_upstream *up) |
12e41d03 | 300 | { |
982bff89 DS |
301 | struct pim_neighbor *nbr; |
302 | ||
7eb90689 DS |
303 | THREAD_OFF (up->t_join_timer); |
304 | ||
982bff89 DS |
305 | nbr = pim_neighbor_find (up->rpf.source_nexthop.interface, |
306 | up->rpf.rpf_addr.u.prefix4); | |
307 | ||
308 | if (nbr) | |
309 | pim_jp_agg_remove_group (nbr->upstream_jp_agg, up); | |
310 | ||
06e12762 | 311 | pim_jp_agg_upstream_verification (up, false); |
982bff89 DS |
312 | } |
313 | ||
314 | void | |
315 | join_timer_start(struct pim_upstream *up) | |
316 | { | |
fc9d070d | 317 | struct pim_neighbor *nbr = NULL; |
982bff89 | 318 | |
fc9d070d DS |
319 | if (up->rpf.source_nexthop.interface) |
320 | { | |
321 | nbr = pim_neighbor_find (up->rpf.source_nexthop.interface, | |
322 | up->rpf.rpf_addr.u.prefix4); | |
323 | ||
324 | if (PIM_DEBUG_PIM_EVENTS) { | |
325 | zlog_debug("%s: starting %d sec timer for upstream (S,G)=%s", | |
326 | __PRETTY_FUNCTION__, | |
327 | qpim_t_periodic, | |
328 | up->sg_str); | |
329 | } | |
330 | } | |
12e41d03 | 331 | |
982bff89 DS |
332 | if (nbr) |
333 | pim_jp_agg_add_group (nbr->upstream_jp_agg, up, 1); | |
334 | else | |
335 | { | |
336 | THREAD_OFF (up->t_join_timer); | |
ffa2c898 QY |
337 | thread_add_timer(master, on_join_timer, up, qpim_t_periodic, |
338 | &up->t_join_timer); | |
982bff89 | 339 | } |
06e12762 | 340 | pim_jp_agg_upstream_verification (up, true); |
12e41d03 DL |
341 | } |
342 | ||
982bff89 DS |
343 | /* |
344 | * This is only called when we are switching the upstream | |
345 | * J/P from one neighbor to another | |
346 | * | |
347 | * As such we need to remove from the old list and | |
348 | * add to the new list. | |
349 | */ | |
350 | void pim_upstream_join_timer_restart(struct pim_upstream *up, struct pim_rpf *old) | |
12e41d03 | 351 | { |
982bff89 | 352 | //THREAD_OFF(up->t_join_timer); |
12e41d03 DL |
353 | join_timer_start(up); |
354 | } | |
355 | ||
356 | static void pim_upstream_join_timer_restart_msec(struct pim_upstream *up, | |
357 | int interval_msec) | |
358 | { | |
359 | if (PIM_DEBUG_PIM_EVENTS) { | |
05e451f8 | 360 | zlog_debug("%s: restarting %d msec timer for upstream (S,G)=%s", |
12e41d03 DL |
361 | __PRETTY_FUNCTION__, |
362 | interval_msec, | |
8bfb8b67 | 363 | up->sg_str); |
12e41d03 DL |
364 | } |
365 | ||
366 | THREAD_OFF(up->t_join_timer); | |
ffa2c898 QY |
367 | thread_add_timer_msec(master, on_join_timer, up, interval_msec, |
368 | &up->t_join_timer); | |
12e41d03 DL |
369 | } |
370 | ||
371 | void pim_upstream_join_suppress(struct pim_upstream *up, | |
372 | struct in_addr rpf_addr, | |
373 | int holdtime) | |
374 | { | |
375 | long t_joinsuppress_msec; | |
376 | long join_timer_remain_msec; | |
377 | ||
378 | t_joinsuppress_msec = MIN(pim_if_t_suppressed_msec(up->rpf.source_nexthop.interface), | |
379 | 1000 * holdtime); | |
380 | ||
381 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
382 | ||
3197cb1e | 383 | if (PIM_DEBUG_TRACE) { |
eaa54bdb | 384 | char rpf_str[INET_ADDRSTRLEN]; |
12e41d03 | 385 | pim_inet4_dump("<rpf?>", rpf_addr, rpf_str, sizeof(rpf_str)); |
05e451f8 | 386 | zlog_debug("%s %s: detected Join%s to RPF'(S,G)=%s: join_timer=%ld msec t_joinsuppress=%ld msec", |
12e41d03 | 387 | __FILE__, __PRETTY_FUNCTION__, |
8bfb8b67 | 388 | up->sg_str, |
12e41d03 DL |
389 | rpf_str, |
390 | join_timer_remain_msec, t_joinsuppress_msec); | |
391 | } | |
392 | ||
393 | if (join_timer_remain_msec < t_joinsuppress_msec) { | |
3197cb1e | 394 | if (PIM_DEBUG_TRACE) { |
05e451f8 | 395 | zlog_debug("%s %s: suppressing Join(S,G)=%s for %ld msec", |
12e41d03 | 396 | __FILE__, __PRETTY_FUNCTION__, |
8bfb8b67 | 397 | up->sg_str, t_joinsuppress_msec); |
12e41d03 DL |
398 | } |
399 | ||
400 | pim_upstream_join_timer_restart_msec(up, t_joinsuppress_msec); | |
401 | } | |
402 | } | |
403 | ||
404 | void pim_upstream_join_timer_decrease_to_t_override(const char *debug_label, | |
c48a612c | 405 | struct pim_upstream *up) |
12e41d03 DL |
406 | { |
407 | long join_timer_remain_msec; | |
408 | int t_override_msec; | |
409 | ||
410 | join_timer_remain_msec = pim_time_timer_remain_msec(up->t_join_timer); | |
411 | t_override_msec = pim_if_t_override_msec(up->rpf.source_nexthop.interface); | |
412 | ||
3197cb1e | 413 | if (PIM_DEBUG_TRACE) { |
eaa54bdb | 414 | char rpf_str[INET_ADDRSTRLEN]; |
c48a612c | 415 | pim_inet4_dump("<rpf?>", up->rpf.rpf_addr.u.prefix4, rpf_str, sizeof(rpf_str)); |
05e451f8 | 416 | zlog_debug("%s: to RPF'%s=%s: join_timer=%ld msec t_override=%d msec", |
12e41d03 | 417 | debug_label, |
8bfb8b67 | 418 | up->sg_str, rpf_str, |
12e41d03 DL |
419 | join_timer_remain_msec, t_override_msec); |
420 | } | |
421 | ||
422 | if (join_timer_remain_msec > t_override_msec) { | |
3197cb1e | 423 | if (PIM_DEBUG_TRACE) { |
05e451f8 | 424 | zlog_debug("%s: decreasing (S,G)=%s join timer to t_override=%d msec", |
12e41d03 | 425 | debug_label, |
8bfb8b67 | 426 | up->sg_str, |
12e41d03 DL |
427 | t_override_msec); |
428 | } | |
429 | ||
430 | pim_upstream_join_timer_restart_msec(up, t_override_msec); | |
431 | } | |
432 | } | |
433 | ||
434 | static void forward_on(struct pim_upstream *up) | |
435 | { | |
12e41d03 DL |
436 | struct listnode *chnode; |
437 | struct listnode *chnextnode; | |
b5e6281b | 438 | struct pim_ifchannel *ch = NULL; |
12e41d03 | 439 | |
ea4a71fc | 440 | /* scan (S,G) state */ |
b5e6281b | 441 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { |
ea4a71fc DS |
442 | if (pim_macro_chisin_oiflist(ch)) |
443 | pim_forward_start(ch); | |
12e41d03 | 444 | |
ea4a71fc | 445 | } /* scan iface channel list */ |
12e41d03 DL |
446 | } |
447 | ||
448 | static void forward_off(struct pim_upstream *up) | |
449 | { | |
12e41d03 DL |
450 | struct listnode *chnode; |
451 | struct listnode *chnextnode; | |
12e41d03 DL |
452 | struct pim_ifchannel *ch; |
453 | ||
ea4a71fc | 454 | /* scan per-interface (S,G) state */ |
b5e6281b | 455 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { |
12e41d03 | 456 | |
ea4a71fc | 457 | pim_forward_stop(ch); |
12e41d03 | 458 | |
ea4a71fc | 459 | } /* scan iface channel list */ |
12e41d03 DL |
460 | } |
461 | ||
bb6e291f DS |
462 | static int |
463 | pim_upstream_could_register (struct pim_upstream *up) | |
464 | { | |
1131c2eb CS |
465 | struct pim_interface *pim_ifp = NULL; |
466 | ||
467 | if (up->rpf.source_nexthop.interface) | |
468 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
469 | else | |
470 | { | |
471 | if (PIM_DEBUG_TRACE) | |
472 | zlog_debug ("%s: up %s RPF is not present", __PRETTY_FUNCTION__, up->sg_str); | |
473 | } | |
bb6e291f | 474 | |
35917570 | 475 | if (pim_ifp && PIM_I_am_DR (pim_ifp) && |
bb6e291f DS |
476 | pim_if_connected_to_source (up->rpf.source_nexthop.interface, up->sg.src)) |
477 | return 1; | |
478 | ||
479 | return 0; | |
480 | } | |
481 | ||
15a5dafe | 482 | /* Source registration is supressed for SSM groups. When the SSM range changes |
483 | * we re-revaluate register setup for existing upstream entries */ | |
484 | void | |
485 | pim_upstream_register_reevaluate (void) | |
486 | { | |
487 | struct listnode *upnode; | |
488 | struct pim_upstream *up; | |
489 | ||
490 | for (ALL_LIST_ELEMENTS_RO (pim_upstream_list, upnode, up)) | |
491 | { | |
492 | /* If FHR is set CouldRegister is True. Also check if the flow | |
493 | * is actually active; if it is not kat setup will trigger source | |
494 | * registration whenever the flow becomes active. */ | |
495 | if (!PIM_UPSTREAM_FLAG_TEST_FHR (up->flags) || !up->t_ka_timer) | |
496 | continue; | |
497 | ||
498 | if (pim_is_grp_ssm (up->sg.grp)) | |
499 | { | |
500 | /* clear the register state for SSM groups */ | |
501 | if (up->reg_state != PIM_REG_NOINFO) | |
502 | { | |
503 | if (PIM_DEBUG_PIM_EVENTS) | |
504 | zlog_debug ("Clear register for %s as G is now SSM", | |
505 | up->sg_str); | |
506 | /* remove regiface from the OIL if it is there*/ | |
507 | pim_channel_del_oif (up->channel_oil, pim_regiface, | |
508 | PIM_OIF_FLAG_PROTO_PIM); | |
509 | up->reg_state = PIM_REG_NOINFO; | |
510 | } | |
511 | } | |
512 | else | |
513 | { | |
514 | /* register ASM sources with the RP */ | |
515 | if (up->reg_state == PIM_REG_NOINFO) | |
516 | { | |
517 | if (PIM_DEBUG_PIM_EVENTS) | |
518 | zlog_debug ("Register %s as G is now ASM", up->sg_str); | |
519 | pim_channel_add_oif (up->channel_oil, pim_regiface, | |
520 | PIM_OIF_FLAG_PROTO_PIM); | |
521 | up->reg_state = PIM_REG_JOIN; | |
522 | } | |
523 | } | |
524 | } | |
525 | } | |
526 | ||
7fcdfb34 DS |
527 | void |
528 | pim_upstream_switch(struct pim_upstream *up, | |
529 | enum pim_upstream_state new_state) | |
12e41d03 DL |
530 | { |
531 | enum pim_upstream_state old_state = up->join_state; | |
532 | ||
55785900 CS |
533 | if (PIM_DEBUG_PIM_EVENTS) |
534 | { | |
535 | zlog_debug ("%s: PIM_UPSTREAM_%s: (S,G) old: %s new: %s", | |
12e41d03 | 536 | __PRETTY_FUNCTION__, |
8bfb8b67 | 537 | up->sg_str, |
c9802954 DS |
538 | pim_upstream_state2str (up->join_state), |
539 | pim_upstream_state2str (new_state)); | |
55785900 | 540 | } |
12e41d03 | 541 | |
b4786acd | 542 | up->join_state = new_state; |
543 | if (old_state != new_state) | |
544 | up->state_transition = pim_time_monotonic_sec(); | |
bb027ee8 | 545 | |
12e41d03 DL |
546 | pim_upstream_update_assert_tracking_desired(up); |
547 | ||
548 | if (new_state == PIM_UPSTREAM_JOINED) { | |
81900c5a DS |
549 | if (old_state != PIM_UPSTREAM_JOINED) |
550 | { | |
0bf27c5c | 551 | int old_fhr = PIM_UPSTREAM_FLAG_TEST_FHR(up->flags); |
81900c5a | 552 | forward_on(up); |
7667c556 | 553 | pim_msdp_up_join_state_changed(up); |
0bf27c5c | 554 | if (pim_upstream_could_register (up)) |
bb6e291f | 555 | { |
0bf27c5c | 556 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); |
a9b59879 | 557 | if (!old_fhr && PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) |
bb6e291f DS |
558 | { |
559 | pim_upstream_keep_alive_timer_start (up, qpim_keep_alive_time); | |
15a5dafe | 560 | pim_register_join (up); |
bb6e291f DS |
561 | } |
562 | } | |
563 | else | |
564 | { | |
565 | pim_upstream_send_join (up); | |
566 | join_timer_start (up); | |
567 | } | |
81900c5a DS |
568 | } |
569 | else | |
570 | { | |
571 | forward_on (up); | |
572 | } | |
12e41d03 DL |
573 | } |
574 | else { | |
982bff89 | 575 | |
12e41d03 | 576 | forward_off(up); |
7667c556 | 577 | if (old_state == PIM_UPSTREAM_JOINED) |
578 | pim_msdp_up_join_state_changed(up); | |
982bff89 | 579 | |
ee22bbae CS |
580 | /* IHR, Trigger SGRpt on *,G IIF to prune S,G from RPT towards RP. |
581 | If I am RP for G then send S,G prune to its IIF. */ | |
582 | if (pim_upstream_is_sg_rpt(up) && up->parent && !I_am_RP(up->sg.grp)) | |
55785900 CS |
583 | { |
584 | if (PIM_DEBUG_PIM_TRACE_DETAIL) | |
585 | zlog_debug ("%s: *,G IIF %s S,G IIF %s ", __PRETTY_FUNCTION__, | |
586 | up->parent->rpf.source_nexthop.interface->name, | |
587 | up->rpf.source_nexthop.interface->name); | |
588 | pim_jp_agg_single_upstream_send(&up->parent->rpf, up->parent, 1 /* (W,G) Join */); | |
589 | } | |
590 | else | |
591 | pim_jp_agg_single_upstream_send(&up->rpf, up, 0 /* prune */); | |
982bff89 | 592 | join_timer_stop(up); |
12e41d03 | 593 | } |
12e41d03 DL |
594 | } |
595 | ||
1bc98276 | 596 | int |
03417ccd DS |
597 | pim_upstream_compare (void *arg1, void *arg2) |
598 | { | |
599 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; | |
600 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
601 | ||
602 | if (ntohl(up1->sg.grp.s_addr) < ntohl(up2->sg.grp.s_addr)) | |
603 | return -1; | |
604 | ||
605 | if (ntohl(up1->sg.grp.s_addr) > ntohl(up2->sg.grp.s_addr)) | |
606 | return 1; | |
607 | ||
608 | if (ntohl(up1->sg.src.s_addr) < ntohl(up2->sg.src.s_addr)) | |
609 | return -1; | |
610 | ||
611 | if (ntohl(up1->sg.src.s_addr) > ntohl(up2->sg.src.s_addr)) | |
612 | return 1; | |
613 | ||
614 | return 0; | |
615 | } | |
616 | ||
07335c8d DS |
617 | static struct pim_upstream * |
618 | pim_upstream_new (struct prefix_sg *sg, | |
619 | struct interface *incoming, | |
620 | int flags) | |
12e41d03 | 621 | { |
2f702571 | 622 | enum pim_rpf_result rpf_result; |
07335c8d DS |
623 | struct pim_interface *pim_ifp; |
624 | struct pim_upstream *up; | |
12e41d03 | 625 | |
36d9e7dc | 626 | up = XCALLOC(MTYPE_PIM_UPSTREAM, sizeof(*up)); |
1bc98276 CS |
627 | if (!up) |
628 | { | |
629 | zlog_err("%s: PIM XCALLOC(%zu) failure", | |
12e41d03 | 630 | __PRETTY_FUNCTION__, sizeof(*up)); |
1bc98276 CS |
631 | return NULL; |
632 | } | |
12e41d03 | 633 | |
5074a423 | 634 | up->sg = *sg; |
8bfb8b67 | 635 | pim_str_sg_set (sg, up->sg_str); |
0f588989 | 636 | up = hash_get (pim_upstream_hash, up, hash_alloc_intern); |
36d6bd7d | 637 | if (!pim_rp_set_upstream_addr (&up->upstream_addr, sg->src, sg->grp)) |
8f5f5e91 | 638 | { |
3197cb1e | 639 | if (PIM_DEBUG_TRACE) |
8f5f5e91 DS |
640 | zlog_debug("%s: Received a (*,G) with no RP configured", __PRETTY_FUNCTION__); |
641 | ||
03417ccd | 642 | hash_release (pim_upstream_hash, up); |
8f5f5e91 DS |
643 | XFREE (MTYPE_PIM_UPSTREAM, up); |
644 | return NULL; | |
645 | } | |
646 | ||
03417ccd DS |
647 | up->parent = pim_upstream_find_parent (up); |
648 | if (up->sg.src.s_addr == INADDR_ANY) | |
649 | { | |
650 | up->sources = list_new (); | |
651 | up->sources->cmp = pim_upstream_compare; | |
652 | } | |
653 | else | |
654 | up->sources = NULL; | |
655 | ||
cfa91a87 | 656 | pim_upstream_find_new_children (up); |
4a40c37a | 657 | up->flags = flags; |
12e41d03 | 658 | up->ref_count = 1; |
4a4c4a07 DS |
659 | up->t_join_timer = NULL; |
660 | up->t_ka_timer = NULL; | |
792f4d29 | 661 | up->t_rs_timer = NULL; |
1bf16443 | 662 | up->t_msdp_reg_timer = NULL; |
b4786acd | 663 | up->join_state = PIM_UPSTREAM_NOTJOINED; |
0c2ebf00 | 664 | up->reg_state = PIM_REG_NOINFO; |
12e41d03 | 665 | up->state_transition = pim_time_monotonic_sec(); |
4a4c4a07 | 666 | up->channel_oil = NULL; |
f9e0ab5b | 667 | up->sptbit = PIM_UPSTREAM_SPTBIT_FALSE; |
12e41d03 | 668 | |
f24405b1 | 669 | up->rpf.source_nexthop.interface = NULL; |
63c59d0c DS |
670 | up->rpf.source_nexthop.mrib_nexthop_addr.family = AF_INET; |
671 | up->rpf.source_nexthop.mrib_nexthop_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
12e41d03 DL |
672 | up->rpf.source_nexthop.mrib_metric_preference = qpim_infinite_assert_metric.metric_preference; |
673 | up->rpf.source_nexthop.mrib_route_metric = qpim_infinite_assert_metric.route_metric; | |
63c59d0c DS |
674 | up->rpf.rpf_addr.family = AF_INET; |
675 | up->rpf.rpf_addr.u.prefix4.s_addr = PIM_NET_INADDR_ANY; | |
12e41d03 | 676 | |
2a28f7a0 DS |
677 | up->ifchannels = list_new(); |
678 | up->ifchannels->cmp = (int (*)(void *, void *))pim_ifchannel_compare; | |
679 | ||
9c5e4d62 DS |
680 | if (up->sg.src.s_addr != INADDR_ANY) |
681 | wheel_add_item (pim_upstream_sg_wheel, up); | |
682 | ||
1bc98276 | 683 | rpf_result = pim_rpf_update(up, NULL, 1); |
2f702571 | 684 | if (rpf_result == PIM_RPF_FAILURE) { |
ec97ac65 DS |
685 | struct prefix nht_p; |
686 | ||
3197cb1e | 687 | if (PIM_DEBUG_TRACE) |
4a40c37a | 688 | zlog_debug ("%s: Attempting to create upstream(%s), Unable to RPF for source", __PRETTY_FUNCTION__, |
8bfb8b67 | 689 | up->sg_str); |
03417ccd | 690 | |
ec97ac65 DS |
691 | nht_p.family = AF_INET; |
692 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
693 | nht_p.u.prefix4 = up->upstream_addr; | |
694 | pim_delete_tracked_nexthop (&nht_p, up, NULL); | |
695 | ||
03417ccd DS |
696 | if (up->parent) |
697 | { | |
698 | listnode_delete (up->parent->sources, up); | |
699 | up->parent = NULL; | |
700 | } | |
9c5e4d62 DS |
701 | |
702 | if (up->sg.src.s_addr != INADDR_ANY) | |
703 | wheel_remove_item (pim_upstream_sg_wheel, up); | |
704 | ||
03417ccd DS |
705 | pim_upstream_remove_children (up); |
706 | if (up->sources) | |
707 | list_delete (up->sources); | |
708 | ||
709 | hash_release (pim_upstream_hash, up); | |
2f702571 DS |
710 | XFREE(MTYPE_PIM_UPSTREAM, up); |
711 | return NULL; | |
712 | } | |
12e41d03 | 713 | |
633988a7 CS |
714 | if (up->rpf.source_nexthop.interface) |
715 | { | |
716 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
717 | if (pim_ifp) | |
718 | up->channel_oil = pim_channel_oil_add(&up->sg, pim_ifp->mroute_vif_index); | |
719 | } | |
0f588989 | 720 | listnode_add_sort(pim_upstream_list, up); |
12e41d03 | 721 | |
3197cb1e | 722 | if (PIM_DEBUG_TRACE) |
1bc98276 | 723 | { |
55785900 | 724 | zlog_debug ("%s: Created Upstream %s upstream_addr %s ref count %d increment", |
1bc98276 | 725 | __PRETTY_FUNCTION__, up->sg_str, |
55785900 | 726 | inet_ntoa (up->upstream_addr), up->ref_count); |
1bc98276 | 727 | } |
03417ccd | 728 | |
12e41d03 DL |
729 | return up; |
730 | } | |
731 | ||
4ed0af70 | 732 | struct pim_upstream *pim_upstream_find(struct prefix_sg *sg) |
12e41d03 | 733 | { |
0f588989 DS |
734 | struct pim_upstream lookup; |
735 | struct pim_upstream *up = NULL; | |
12e41d03 | 736 | |
0f588989 DS |
737 | lookup.sg = *sg; |
738 | up = hash_lookup (pim_upstream_hash, &lookup); | |
739 | return up; | |
12e41d03 DL |
740 | } |
741 | ||
e711cd3c DS |
742 | struct pim_upstream * |
743 | pim_upstream_find_or_add(struct prefix_sg *sg, | |
744 | struct interface *incoming, | |
745 | int flags, const char *name) | |
746 | { | |
747 | struct pim_upstream *up; | |
748 | ||
749 | up = pim_upstream_find(sg); | |
750 | ||
751 | if (up) | |
752 | { | |
753 | if (!(up->flags & flags)) | |
754 | { | |
755 | up->flags |= flags; | |
756 | up->ref_count++; | |
55785900 CS |
757 | if (PIM_DEBUG_TRACE) |
758 | zlog_debug ("%s(%s): upstream %s ref count %d increment", | |
759 | __PRETTY_FUNCTION__, name, up->sg_str, up->ref_count); | |
e711cd3c DS |
760 | } |
761 | } | |
762 | else | |
763 | up = pim_upstream_add (sg, incoming, flags, name); | |
764 | ||
765 | return up; | |
766 | } | |
767 | ||
d0db90bf | 768 | void |
55785900 | 769 | pim_upstream_ref(struct pim_upstream *up, int flags, const char *name) |
1bf16443 | 770 | { |
771 | up->flags |= flags; | |
772 | ++up->ref_count; | |
55785900 CS |
773 | if (PIM_DEBUG_TRACE) |
774 | zlog_debug ("%s(%s): upstream %s ref count %d increment", | |
775 | __PRETTY_FUNCTION__, name, up->sg_str, up->ref_count); | |
1bf16443 | 776 | } |
777 | ||
4ed0af70 | 778 | struct pim_upstream *pim_upstream_add(struct prefix_sg *sg, |
4a40c37a | 779 | struct interface *incoming, |
e5905a3b | 780 | int flags, const char *name) |
12e41d03 | 781 | { |
594a78cc | 782 | struct pim_upstream *up = NULL; |
e5905a3b | 783 | int found = 0; |
5074a423 | 784 | up = pim_upstream_find(sg); |
12e41d03 | 785 | if (up) { |
55785900 | 786 | pim_upstream_ref(up, flags, name); |
e5905a3b | 787 | found = 1; |
12e41d03 DL |
788 | } |
789 | else { | |
4a40c37a | 790 | up = pim_upstream_new(sg, incoming, flags); |
12e41d03 DL |
791 | } |
792 | ||
e5905a3b | 793 | if (PIM_DEBUG_TRACE) |
f4075cb4 DS |
794 | { |
795 | if (up) | |
633988a7 CS |
796 | { |
797 | char buf[PREFIX2STR_BUFFER]; | |
798 | prefix2str (&up->rpf.rpf_addr, buf, sizeof (buf)); | |
55785900 | 799 | zlog_debug("%s(%s): %s, iif %s (%s) found: %d: ref_count: %d", |
f4075cb4 | 800 | __PRETTY_FUNCTION__, name, |
55785900 CS |
801 | up->sg_str, buf, up->rpf.source_nexthop.interface ? |
802 | up->rpf.source_nexthop.interface->name : "NIL" , | |
803 | found, up->ref_count); | |
633988a7 | 804 | } |
f4075cb4 DS |
805 | else |
806 | zlog_debug("%s(%s): (%s) failure to create", | |
807 | __PRETTY_FUNCTION__, name, | |
808 | pim_str_sg_dump (sg)); | |
809 | } | |
12e41d03 | 810 | |
e5905a3b | 811 | return up; |
12e41d03 DL |
812 | } |
813 | ||
c8fc07cb DS |
814 | /* |
815 | * Passed in up must be the upstream for ch. starch is NULL if no | |
816 | * information | |
817 | */ | |
9f44d042 | 818 | int |
7a3ddda5 | 819 | pim_upstream_evaluate_join_desired_interface (struct pim_upstream *up, |
c8fc07cb DS |
820 | struct pim_ifchannel *ch, |
821 | struct pim_ifchannel *starch) | |
7a3ddda5 | 822 | { |
c8fc07cb | 823 | if (ch) |
7a3ddda5 | 824 | { |
46c8aab8 | 825 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) |
c8fc07cb | 826 | return 0; |
d1e77284 DS |
827 | |
828 | if (!pim_macro_ch_lost_assert(ch) && pim_macro_chisin_joins_or_include(ch)) | |
c8fc07cb | 829 | return 1; |
7a3ddda5 | 830 | } |
46c8aab8 | 831 | |
7a3ddda5 DS |
832 | /* |
833 | * joins (*,G) | |
834 | */ | |
c8fc07cb | 835 | if (starch) |
7a3ddda5 | 836 | { |
c8fc07cb DS |
837 | if (PIM_IF_FLAG_TEST_S_G_RPT (starch->upstream->flags)) |
838 | return 0; | |
839 | ||
840 | if (!pim_macro_ch_lost_assert (starch) && pim_macro_chisin_joins_or_include (starch)) | |
841 | return 1; | |
7a3ddda5 DS |
842 | } |
843 | ||
844 | return 0; | |
845 | } | |
846 | ||
12e41d03 DL |
847 | /* |
848 | Evaluate JoinDesired(S,G): | |
849 | ||
850 | JoinDesired(S,G) is true if there is a downstream (S,G) interface I | |
851 | in the set: | |
852 | ||
853 | inherited_olist(S,G) = | |
854 | joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
855 | ||
856 | JoinDesired(S,G) may be affected by changes in the following: | |
857 | ||
858 | pim_ifp->primary_address | |
859 | pim_ifp->pim_dr_addr | |
860 | ch->ifassert_winner_metric | |
861 | ch->ifassert_winner | |
862 | ch->local_ifmembership | |
863 | ch->ifjoin_state | |
864 | ch->upstream->rpf.source_nexthop.mrib_metric_preference | |
865 | ch->upstream->rpf.source_nexthop.mrib_route_metric | |
866 | ch->upstream->rpf.source_nexthop.interface | |
867 | ||
868 | See also pim_upstream_update_join_desired() below. | |
869 | */ | |
870 | int pim_upstream_evaluate_join_desired(struct pim_upstream *up) | |
871 | { | |
c8fc07cb DS |
872 | struct interface *ifp; |
873 | struct listnode *node; | |
874 | struct pim_ifchannel *ch, *starch; | |
875 | struct pim_upstream *starup = up->parent; | |
7a3ddda5 | 876 | int ret = 0; |
12e41d03 | 877 | |
c8fc07cb | 878 | for (ALL_LIST_ELEMENTS_RO (vrf_iflist (VRF_DEFAULT), node, ifp)) |
ea4a71fc | 879 | { |
c8fc07cb DS |
880 | if (!ifp->info) |
881 | continue; | |
882 | ||
883 | ch = pim_ifchannel_find (ifp, &up->sg); | |
884 | ||
885 | if (starup) | |
886 | starch = pim_ifchannel_find (ifp, &starup->sg); | |
887 | else | |
888 | starch = NULL; | |
889 | ||
890 | if (!ch && !starch) | |
891 | continue; | |
12e41d03 | 892 | |
c8fc07cb | 893 | ret += pim_upstream_evaluate_join_desired_interface (up, ch, starch); |
ea4a71fc | 894 | } /* scan iface channel list */ |
12e41d03 | 895 | |
7a3ddda5 | 896 | return ret; /* false */ |
12e41d03 DL |
897 | } |
898 | ||
899 | /* | |
900 | See also pim_upstream_evaluate_join_desired() above. | |
901 | */ | |
902 | void pim_upstream_update_join_desired(struct pim_upstream *up) | |
903 | { | |
904 | int was_join_desired; /* boolean */ | |
905 | int is_join_desired; /* boolean */ | |
906 | ||
907 | was_join_desired = PIM_UPSTREAM_FLAG_TEST_DR_JOIN_DESIRED(up->flags); | |
908 | ||
909 | is_join_desired = pim_upstream_evaluate_join_desired(up); | |
910 | if (is_join_desired) | |
911 | PIM_UPSTREAM_FLAG_SET_DR_JOIN_DESIRED(up->flags); | |
912 | else | |
913 | PIM_UPSTREAM_FLAG_UNSET_DR_JOIN_DESIRED(up->flags); | |
914 | ||
915 | /* switched from false to true */ | |
916 | if (is_join_desired && !was_join_desired) { | |
12e41d03 DL |
917 | pim_upstream_switch(up, PIM_UPSTREAM_JOINED); |
918 | return; | |
919 | } | |
920 | ||
921 | /* switched from true to false */ | |
922 | if (!is_join_desired && was_join_desired) { | |
12e41d03 DL |
923 | pim_upstream_switch(up, PIM_UPSTREAM_NOTJOINED); |
924 | return; | |
925 | } | |
926 | } | |
927 | ||
928 | /* | |
929 | RFC 4601 4.5.7. Sending (S,G) Join/Prune Messages | |
930 | Transitions from Joined State | |
931 | RPF'(S,G) GenID changes | |
932 | ||
933 | The upstream (S,G) state machine remains in Joined state. If the | |
934 | Join Timer is set to expire in more than t_override seconds, reset | |
935 | it so that it expires after t_override seconds. | |
936 | */ | |
937 | void pim_upstream_rpf_genid_changed(struct in_addr neigh_addr) | |
938 | { | |
939 | struct listnode *up_node; | |
940 | struct listnode *up_nextnode; | |
941 | struct pim_upstream *up; | |
942 | ||
943 | /* | |
0f588989 DS |
944 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr |
945 | */ | |
946 | for (ALL_LIST_ELEMENTS(pim_upstream_list, up_node, up_nextnode, up)) { | |
12e41d03 | 947 | |
3197cb1e | 948 | if (PIM_DEBUG_TRACE) { |
eaa54bdb DW |
949 | char neigh_str[INET_ADDRSTRLEN]; |
950 | char rpf_addr_str[PREFIX_STRLEN]; | |
12e41d03 | 951 | pim_inet4_dump("<neigh?>", neigh_addr, neigh_str, sizeof(neigh_str)); |
63c59d0c | 952 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_addr_str, sizeof(rpf_addr_str)); |
05e451f8 | 953 | zlog_debug("%s: matching neigh=%s against upstream (S,G)=%s joined=%d rpf_addr=%s", |
12e41d03 | 954 | __PRETTY_FUNCTION__, |
8bfb8b67 | 955 | neigh_str, up->sg_str, |
12e41d03 DL |
956 | up->join_state == PIM_UPSTREAM_JOINED, |
957 | rpf_addr_str); | |
958 | } | |
959 | ||
960 | /* consider only (S,G) upstream in Joined state */ | |
961 | if (up->join_state != PIM_UPSTREAM_JOINED) | |
962 | continue; | |
963 | ||
964 | /* match RPF'(S,G)=neigh_addr */ | |
63c59d0c | 965 | if (up->rpf.rpf_addr.u.prefix4.s_addr != neigh_addr.s_addr) |
12e41d03 DL |
966 | continue; |
967 | ||
968 | pim_upstream_join_timer_decrease_to_t_override("RPF'(S,G) GenID change", | |
c48a612c | 969 | up); |
12e41d03 DL |
970 | } |
971 | } | |
972 | ||
973 | ||
974 | void pim_upstream_rpf_interface_changed(struct pim_upstream *up, | |
975 | struct interface *old_rpf_ifp) | |
976 | { | |
ea4a71fc DS |
977 | struct listnode *chnode; |
978 | struct listnode *chnextnode; | |
979 | struct pim_ifchannel *ch; | |
ea4a71fc DS |
980 | |
981 | /* search all ifchannels */ | |
b5e6281b | 982 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { |
ea4a71fc DS |
983 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { |
984 | if ( | |
985 | /* RPF_interface(S) was NOT I */ | |
986 | (old_rpf_ifp == ch->interface) | |
987 | && | |
988 | /* RPF_interface(S) stopped being I */ | |
989 | (ch->upstream->rpf.source_nexthop.interface != ch->interface) | |
990 | ) { | |
991 | assert_action_a5(ch); | |
992 | } | |
993 | } /* PIM_IFASSERT_I_AM_LOSER */ | |
12e41d03 | 994 | |
ea4a71fc | 995 | pim_ifchannel_update_assert_tracking_desired(ch); |
12e41d03 DL |
996 | } |
997 | } | |
998 | ||
999 | void pim_upstream_update_could_assert(struct pim_upstream *up) | |
1000 | { | |
12e41d03 DL |
1001 | struct listnode *chnode; |
1002 | struct listnode *chnextnode; | |
12e41d03 DL |
1003 | struct pim_ifchannel *ch; |
1004 | ||
ea4a71fc | 1005 | /* scan per-interface (S,G) state */ |
b5e6281b | 1006 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { |
ea4a71fc DS |
1007 | pim_ifchannel_update_could_assert(ch); |
1008 | } /* scan iface channel list */ | |
12e41d03 DL |
1009 | } |
1010 | ||
1011 | void pim_upstream_update_my_assert_metric(struct pim_upstream *up) | |
1012 | { | |
12e41d03 DL |
1013 | struct listnode *chnode; |
1014 | struct listnode *chnextnode; | |
12e41d03 DL |
1015 | struct pim_ifchannel *ch; |
1016 | ||
ea4a71fc | 1017 | /* scan per-interface (S,G) state */ |
b5e6281b | 1018 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) { |
ea4a71fc | 1019 | pim_ifchannel_update_my_assert_metric(ch); |
12e41d03 | 1020 | |
ea4a71fc | 1021 | } /* scan iface channel list */ |
12e41d03 DL |
1022 | } |
1023 | ||
1024 | static void pim_upstream_update_assert_tracking_desired(struct pim_upstream *up) | |
1025 | { | |
12e41d03 DL |
1026 | struct listnode *chnode; |
1027 | struct listnode *chnextnode; | |
12e41d03 DL |
1028 | struct pim_interface *pim_ifp; |
1029 | struct pim_ifchannel *ch; | |
1030 | ||
ea4a71fc | 1031 | /* scan per-interface (S,G) state */ |
4ba87bb9 CS |
1032 | for (ALL_LIST_ELEMENTS(up->ifchannels, chnode, chnextnode, ch)) |
1033 | { | |
1034 | if (!ch->interface) | |
1035 | continue; | |
1036 | pim_ifp = ch->interface->info; | |
1037 | if (!pim_ifp) | |
1038 | continue; | |
12e41d03 | 1039 | |
4ba87bb9 | 1040 | pim_ifchannel_update_assert_tracking_desired(ch); |
12e41d03 | 1041 | |
4ba87bb9 | 1042 | } /* scan iface channel list */ |
12e41d03 | 1043 | } |
f14248dd | 1044 | |
1bf16443 | 1045 | /* When kat is stopped CouldRegister goes to false so we need to |
1046 | * transition the (S, G) on FHR to NI state and remove reg tunnel | |
1047 | * from the OIL */ | |
1048 | static void pim_upstream_fhr_kat_expiry(struct pim_upstream *up) | |
1049 | { | |
1050 | if (!PIM_UPSTREAM_FLAG_TEST_FHR(up->flags)) | |
1051 | return; | |
1052 | ||
1053 | if (PIM_DEBUG_TRACE) | |
8bfb8b67 DS |
1054 | zlog_debug ("kat expired on %s; clear fhr reg state", up->sg_str); |
1055 | ||
1bf16443 | 1056 | /* stop reg-stop timer */ |
1057 | THREAD_OFF(up->t_rs_timer); | |
1058 | /* remove regiface from the OIL if it is there*/ | |
1059 | pim_channel_del_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); | |
0c2ebf00 | 1060 | /* clear the register state */ |
1061 | up->reg_state = PIM_REG_NOINFO; | |
1bf16443 | 1062 | PIM_UPSTREAM_FLAG_UNSET_FHR(up->flags); |
1063 | } | |
1064 | ||
1065 | /* When kat is started CouldRegister can go to true. And if it does we | |
1066 | * need to transition the (S, G) on FHR to JOINED state and add reg tunnel | |
1067 | * to the OIL */ | |
1068 | static void pim_upstream_fhr_kat_start(struct pim_upstream *up) | |
1069 | { | |
1070 | if (pim_upstream_could_register(up)) { | |
1071 | if (PIM_DEBUG_TRACE) | |
8bfb8b67 DS |
1072 | zlog_debug ("kat started on %s; set fhr reg state to joined", up->sg_str); |
1073 | ||
1bf16443 | 1074 | PIM_UPSTREAM_FLAG_SET_FHR(up->flags); |
15a5dafe | 1075 | if (up->reg_state == PIM_REG_NOINFO) |
1076 | pim_register_join (up); | |
1bf16443 | 1077 | } |
1078 | } | |
1079 | ||
f14248dd DS |
1080 | /* |
1081 | * On an RP, the PMBR value must be cleared when the | |
1082 | * Keepalive Timer expires | |
1bf16443 | 1083 | * KAT expiry indicates that flow is inactive. If the flow was created or |
1084 | * maintained by activity now is the time to deref it. | |
f14248dd DS |
1085 | */ |
1086 | static int | |
1087 | pim_upstream_keep_alive_timer (struct thread *t) | |
1088 | { | |
1089 | struct pim_upstream *up; | |
1090 | ||
1091 | up = THREAD_ARG(t); | |
1092 | ||
4ed0af70 | 1093 | if (I_am_RP (up->sg.grp)) |
850a9f99 DS |
1094 | { |
1095 | pim_br_clear_pmbr (&up->sg); | |
1096 | /* | |
1097 | * We need to do more here :) | |
1098 | * But this is the start. | |
1099 | */ | |
1100 | } | |
14315ea8 | 1101 | |
1bf16443 | 1102 | /* source is no longer active - pull the SA from MSDP's cache */ |
1103 | pim_msdp_sa_local_del(&up->sg); | |
14315ea8 | 1104 | |
1bf16443 | 1105 | /* if entry was created because of activity we need to deref it */ |
1106 | if (PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) | |
850a9f99 DS |
1107 | { |
1108 | pim_upstream_fhr_kat_expiry(up); | |
1109 | if (PIM_DEBUG_TRACE) | |
1110 | zlog_debug ("kat expired on %s; remove stream reference", up->sg_str); | |
1111 | PIM_UPSTREAM_FLAG_UNSET_SRC_STREAM(up->flags); | |
1112 | pim_upstream_del(up, __PRETTY_FUNCTION__); | |
1113 | } | |
1114 | else if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(up->flags)) | |
1115 | { | |
1116 | PIM_UPSTREAM_FLAG_UNSET_SRC_LHR(up->flags); | |
1117 | pim_upstream_del(up, __PRETTY_FUNCTION__); | |
1118 | } | |
14315ea8 | 1119 | |
1bf16443 | 1120 | return 0; |
f14248dd DS |
1121 | } |
1122 | ||
f14248dd DS |
1123 | void |
1124 | pim_upstream_keep_alive_timer_start (struct pim_upstream *up, | |
1125 | uint32_t time) | |
1126 | { | |
1bf16443 | 1127 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) { |
1128 | if (PIM_DEBUG_TRACE) | |
8bfb8b67 | 1129 | zlog_debug ("kat start on %s with no stream reference", up->sg_str); |
1bf16443 | 1130 | } |
00d2f9e4 | 1131 | THREAD_OFF (up->t_ka_timer); |
ffa2c898 QY |
1132 | thread_add_timer(master, pim_upstream_keep_alive_timer, up, time, |
1133 | &up->t_ka_timer); | |
1bf16443 | 1134 | |
1135 | /* any time keepalive is started against a SG we will have to | |
1136 | * re-evaluate our active source database */ | |
1137 | pim_msdp_sa_local_update(up); | |
1138 | } | |
1139 | ||
1140 | /* MSDP on RP needs to know if a source is registerable to this RP */ | |
1141 | static int | |
1142 | pim_upstream_msdp_reg_timer(struct thread *t) | |
1143 | { | |
1144 | struct pim_upstream *up; | |
1145 | ||
1146 | up = THREAD_ARG(t); | |
1bf16443 | 1147 | |
1148 | /* source is no longer active - pull the SA from MSDP's cache */ | |
1149 | pim_msdp_sa_local_del(&up->sg); | |
1150 | return 1; | |
1151 | } | |
1152 | void | |
1153 | pim_upstream_msdp_reg_timer_start(struct pim_upstream *up) | |
1154 | { | |
1155 | THREAD_OFF(up->t_msdp_reg_timer); | |
ffa2c898 QY |
1156 | thread_add_timer(master, pim_upstream_msdp_reg_timer, up, |
1157 | PIM_MSDP_REG_RXED_PERIOD, &up->t_msdp_reg_timer); | |
1bf16443 | 1158 | |
1159 | pim_msdp_sa_local_update(up); | |
f14248dd | 1160 | } |
cb40b272 DS |
1161 | |
1162 | /* | |
1163 | * 4.2.1 Last-Hop Switchover to the SPT | |
1164 | * | |
1165 | * In Sparse-Mode PIM, last-hop routers join the shared tree towards the | |
1166 | * RP. Once traffic from sources to joined groups arrives at a last-hop | |
1167 | * router, it has the option of switching to receive the traffic on a | |
1168 | * shortest path tree (SPT). | |
1169 | * | |
1170 | * The decision for a router to switch to the SPT is controlled as | |
1171 | * follows: | |
1172 | * | |
1173 | * void | |
1174 | * CheckSwitchToSpt(S,G) { | |
1175 | * if ( ( pim_include(*,G) (-) pim_exclude(S,G) | |
1176 | * (+) pim_include(S,G) != NULL ) | |
1177 | * AND SwitchToSptDesired(S,G) ) { | |
1178 | * # Note: Restarting the KAT will result in the SPT switch | |
1179 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1180 | * } | |
1181 | * } | |
1182 | * | |
1183 | * SwitchToSptDesired(S,G) is a policy function that is implementation | |
1184 | * defined. An "infinite threshold" policy can be implemented by making | |
1185 | * SwitchToSptDesired(S,G) return false all the time. A "switch on | |
1186 | * first packet" policy can be implemented by making | |
1187 | * SwitchToSptDesired(S,G) return true once a single packet has been | |
1188 | * received for the source and group. | |
1189 | */ | |
1190 | int | |
4ed0af70 | 1191 | pim_upstream_switch_to_spt_desired (struct prefix_sg *sg) |
cb40b272 | 1192 | { |
4ed0af70 | 1193 | if (I_am_RP (sg->grp)) |
a3b58b4a DS |
1194 | return 1; |
1195 | ||
cb40b272 DS |
1196 | return 0; |
1197 | } | |
d7259eac | 1198 | |
80d9c3a0 DS |
1199 | int |
1200 | pim_upstream_is_sg_rpt (struct pim_upstream *up) | |
1201 | { | |
f21597f0 DS |
1202 | struct listnode *chnode; |
1203 | struct pim_ifchannel *ch; | |
1204 | ||
b5e6281b | 1205 | for (ALL_LIST_ELEMENTS_RO(up->ifchannels, chnode, ch)) |
f21597f0 | 1206 | { |
b5e6281b DS |
1207 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) |
1208 | return 1; | |
f21597f0 | 1209 | } |
e43b8697 | 1210 | |
80d9c3a0 DS |
1211 | return 0; |
1212 | } | |
3a66b17b DS |
1213 | /* |
1214 | * After receiving a packet set SPTbit: | |
1215 | * void | |
1216 | * Update_SPTbit(S,G,iif) { | |
1217 | * if ( iif == RPF_interface(S) | |
1218 | * AND JoinDesired(S,G) == TRUE | |
1219 | * AND ( DirectlyConnected(S) == TRUE | |
1220 | * OR RPF_interface(S) != RPF_interface(RP(G)) | |
1221 | * OR inherited_olist(S,G,rpt) == NULL | |
1222 | * OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1223 | * ( RPF'(S,G) != NULL ) ) | |
1224 | * OR ( I_Am_Assert_Loser(S,G,iif) ) { | |
1225 | * Set SPTbit(S,G) to TRUE | |
1226 | * } | |
1227 | * } | |
1228 | */ | |
1229 | void | |
1230 | pim_upstream_set_sptbit (struct pim_upstream *up, struct interface *incoming) | |
1231 | { | |
bacf3d12 | 1232 | struct pim_upstream *starup = up->parent; |
3a66b17b DS |
1233 | |
1234 | // iif == RPF_interfvace(S) | |
1235 | if (up->rpf.source_nexthop.interface != incoming) | |
1236 | { | |
1237 | if (PIM_DEBUG_TRACE) | |
1238 | zlog_debug ("%s: Incoming Interface: %s is different than RPF_interface(S) %s", | |
1239 | __PRETTY_FUNCTION__, incoming->name, up->rpf.source_nexthop.interface->name); | |
1240 | return; | |
1241 | } | |
1242 | ||
1243 | // AND JoinDesired(S,G) == TRUE | |
1244 | // FIXME | |
1245 | ||
1246 | // DirectlyConnected(S) == TRUE | |
1247 | if (pim_if_connected_to_source (up->rpf.source_nexthop.interface, up->sg.src)) | |
1248 | { | |
1249 | if (PIM_DEBUG_TRACE) | |
1250 | zlog_debug ("%s: %s is directly connected to the source", __PRETTY_FUNCTION__, | |
8bfb8b67 | 1251 | up->sg_str); |
3a66b17b DS |
1252 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; |
1253 | return; | |
1254 | } | |
1255 | ||
1256 | // OR RPF_interface(S) != RPF_interface(RP(G)) | |
bacf3d12 | 1257 | if (!starup || up->rpf.source_nexthop.interface != starup->rpf.source_nexthop.interface) |
3a66b17b DS |
1258 | { |
1259 | if (PIM_DEBUG_TRACE) | |
1260 | zlog_debug ("%s: %s RPF_interface(S) != RPF_interface(RP(G))", | |
8bfb8b67 | 1261 | __PRETTY_FUNCTION__, up->sg_str); |
3a66b17b DS |
1262 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; |
1263 | return; | |
1264 | } | |
1265 | ||
1266 | // OR inherited_olist(S,G,rpt) == NULL | |
1267 | if (pim_upstream_is_sg_rpt(up) && pim_upstream_empty_inherited_olist(up)) | |
1268 | { | |
1269 | if (PIM_DEBUG_TRACE) | |
1270 | zlog_debug ("%s: %s OR inherited_olist(S,G,rpt) == NULL", __PRETTY_FUNCTION__, | |
8bfb8b67 | 1271 | up->sg_str); |
3a66b17b DS |
1272 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; |
1273 | return; | |
1274 | } | |
1275 | ||
1276 | // OR ( ( RPF'(S,G) == RPF'(*,G) ) AND | |
1277 | // ( RPF'(S,G) != NULL ) ) | |
1278 | if (up->parent && pim_rpf_is_same (&up->rpf, &up->parent->rpf)) | |
1279 | { | |
1280 | if (PIM_DEBUG_TRACE) | |
1281 | zlog_debug ("%s: %s RPF'(S,G) is the same as RPF'(*,G)", __PRETTY_FUNCTION__, | |
8bfb8b67 | 1282 | up->sg_str); |
3a66b17b DS |
1283 | up->sptbit = PIM_UPSTREAM_SPTBIT_TRUE; |
1284 | return; | |
1285 | } | |
1286 | ||
1287 | return; | |
1288 | } | |
80d9c3a0 | 1289 | |
d7259eac | 1290 | const char * |
c9802954 | 1291 | pim_upstream_state2str (enum pim_upstream_state join_state) |
d7259eac | 1292 | { |
c9802954 | 1293 | switch (join_state) |
d7259eac DS |
1294 | { |
1295 | case PIM_UPSTREAM_NOTJOINED: | |
e775c0a4 | 1296 | return "NotJoined"; |
d7259eac DS |
1297 | break; |
1298 | case PIM_UPSTREAM_JOINED: | |
e775c0a4 | 1299 | return "Joined"; |
d7259eac | 1300 | break; |
d7259eac | 1301 | } |
e775c0a4 | 1302 | return "Unknown"; |
d7259eac | 1303 | } |
627ed2a3 | 1304 | |
e0e127b0 | 1305 | const char * |
0c2ebf00 | 1306 | pim_reg_state2str (enum pim_reg_state reg_state, char *state_str) |
e0e127b0 | 1307 | { |
0c2ebf00 | 1308 | switch (reg_state) |
e0e127b0 | 1309 | { |
0c2ebf00 | 1310 | case PIM_REG_NOINFO: |
1311 | strcpy (state_str, "RegNoInfo"); | |
e0e127b0 | 1312 | break; |
0c2ebf00 | 1313 | case PIM_REG_JOIN: |
1314 | strcpy (state_str, "RegJoined"); | |
e0e127b0 | 1315 | break; |
0c2ebf00 | 1316 | case PIM_REG_JOIN_PENDING: |
1317 | strcpy (state_str, "RegJoinPend"); | |
e0e127b0 | 1318 | break; |
0c2ebf00 | 1319 | case PIM_REG_PRUNE: |
1320 | strcpy (state_str, "RegPrune"); | |
e0e127b0 | 1321 | break; |
1322 | default: | |
0c2ebf00 | 1323 | strcpy (state_str, "RegUnknown"); |
e0e127b0 | 1324 | } |
1325 | return state_str; | |
1326 | } | |
1327 | ||
627ed2a3 DS |
1328 | static int |
1329 | pim_upstream_register_stop_timer (struct thread *t) | |
1330 | { | |
4df01a4e | 1331 | struct pim_interface *pim_ifp; |
627ed2a3 DS |
1332 | struct pim_upstream *up; |
1333 | struct pim_rpf *rpg; | |
1334 | struct ip ip_hdr; | |
627ed2a3 DS |
1335 | up = THREAD_ARG (t); |
1336 | ||
627ed2a3 DS |
1337 | if (PIM_DEBUG_TRACE) |
1338 | { | |
0c2ebf00 | 1339 | char state_str[PIM_REG_STATE_STR_LEN]; |
d5ed8a9c | 1340 | zlog_debug ("%s: (S,G)=%s upstream register stop timer %s", |
8bfb8b67 | 1341 | __PRETTY_FUNCTION__, up->sg_str, |
0c2ebf00 | 1342 | pim_reg_state2str(up->reg_state, state_str)); |
627ed2a3 DS |
1343 | } |
1344 | ||
e0e127b0 | 1345 | switch (up->reg_state) |
627ed2a3 | 1346 | { |
0c2ebf00 | 1347 | case PIM_REG_JOIN_PENDING: |
1348 | up->reg_state = PIM_REG_JOIN; | |
bb027ee8 DS |
1349 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_PIM); |
1350 | break; | |
0c2ebf00 | 1351 | case PIM_REG_JOIN: |
627ed2a3 | 1352 | break; |
0c2ebf00 | 1353 | case PIM_REG_PRUNE: |
4df01a4e | 1354 | pim_ifp = up->rpf.source_nexthop.interface->info; |
7ef66046 DS |
1355 | if (!pim_ifp) |
1356 | { | |
1357 | if (PIM_DEBUG_TRACE) | |
1358 | zlog_debug ("%s: Interface: %s is not configured for pim", | |
1359 | __PRETTY_FUNCTION__, up->rpf.source_nexthop.interface->name); | |
1360 | return 0; | |
1361 | } | |
0c2ebf00 | 1362 | up->reg_state = PIM_REG_JOIN_PENDING; |
627ed2a3 DS |
1363 | pim_upstream_start_register_stop_timer (up, 1); |
1364 | ||
70e7fda8 DS |
1365 | if (((up->channel_oil->cc.lastused/100) > PIM_KEEPALIVE_PERIOD) && |
1366 | (I_am_RP (up->sg.grp))) | |
1367 | { | |
1368 | if (PIM_DEBUG_TRACE) | |
1369 | zlog_debug ("%s: Stop sending the register, because I am the RP and we haven't seen a packet in a while", __PRETTY_FUNCTION__); | |
1370 | return 0; | |
1371 | } | |
4ed0af70 | 1372 | rpg = RP (up->sg.grp); |
627ed2a3 DS |
1373 | memset (&ip_hdr, 0, sizeof (struct ip)); |
1374 | ip_hdr.ip_p = PIM_IP_PROTO_PIM; | |
1375 | ip_hdr.ip_hl = 5; | |
1376 | ip_hdr.ip_v = 4; | |
4ed0af70 DS |
1377 | ip_hdr.ip_src = up->sg.src; |
1378 | ip_hdr.ip_dst = up->sg.grp; | |
dc686f82 | 1379 | ip_hdr.ip_len = htons (20); |
627ed2a3 | 1380 | // checksum is broken |
4df01a4e | 1381 | pim_register_send ((uint8_t *)&ip_hdr, sizeof (struct ip), |
0e3b3d5d | 1382 | pim_ifp->primary_address, rpg, 1, up); |
627ed2a3 DS |
1383 | break; |
1384 | default: | |
1385 | break; | |
1386 | } | |
1387 | ||
1388 | return 0; | |
1389 | } | |
1390 | ||
1391 | void | |
1392 | pim_upstream_start_register_stop_timer (struct pim_upstream *up, int null_register) | |
1393 | { | |
1394 | uint32_t time; | |
1395 | ||
25c58d6d | 1396 | THREAD_TIMER_OFF (up->t_rs_timer); |
627ed2a3 DS |
1397 | |
1398 | if (!null_register) | |
1399 | { | |
1400 | uint32_t lower = (0.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1401 | uint32_t upper = (1.5 * PIM_REGISTER_SUPPRESSION_PERIOD); | |
1402 | time = lower + (random () % (upper - lower + 1)) - PIM_REGISTER_PROBE_PERIOD; | |
1403 | } | |
1404 | else | |
1405 | time = PIM_REGISTER_PROBE_PERIOD; | |
1406 | ||
1407 | if (PIM_DEBUG_TRACE) | |
1408 | { | |
05e451f8 | 1409 | zlog_debug ("%s: (S,G)=%s Starting upstream register stop timer %d", |
8bfb8b67 | 1410 | __PRETTY_FUNCTION__, up->sg_str, time); |
627ed2a3 | 1411 | } |
ffa2c898 QY |
1412 | thread_add_timer(master, pim_upstream_register_stop_timer, up, time, |
1413 | &up->t_rs_timer); | |
627ed2a3 | 1414 | } |
4fdc8f36 | 1415 | |
4fdc8f36 | 1416 | int |
b5183fd1 | 1417 | pim_upstream_inherited_olist_decide (struct pim_upstream *up) |
4fdc8f36 | 1418 | { |
c8fc07cb | 1419 | struct interface *ifp; |
1131c2eb | 1420 | struct pim_interface *pim_ifp = NULL; |
c8fc07cb DS |
1421 | struct pim_ifchannel *ch, *starch; |
1422 | struct listnode *node; | |
1423 | struct pim_upstream *starup = up->parent; | |
219e0013 DS |
1424 | int output_intf = 0; |
1425 | ||
1131c2eb CS |
1426 | if (up->rpf.source_nexthop.interface) |
1427 | pim_ifp = up->rpf.source_nexthop.interface->info; | |
1428 | else | |
1429 | { | |
1430 | if (PIM_DEBUG_TRACE) | |
1431 | zlog_debug ("%s: up %s RPF is not present", __PRETTY_FUNCTION__, up->sg_str); | |
1432 | } | |
da55afba | 1433 | if (pim_ifp && !up->channel_oil) |
3667b0bc | 1434 | up->channel_oil = pim_channel_oil_add (&up->sg, pim_ifp->mroute_vif_index); |
219e0013 | 1435 | |
c8fc07cb | 1436 | for (ALL_LIST_ELEMENTS_RO (vrf_iflist (VRF_DEFAULT), node, ifp)) |
219e0013 | 1437 | { |
c8fc07cb DS |
1438 | if (!ifp->info) |
1439 | continue; | |
219e0013 | 1440 | |
c8fc07cb DS |
1441 | ch = pim_ifchannel_find (ifp, &up->sg); |
1442 | ||
1443 | if (starup) | |
1444 | starch = pim_ifchannel_find (ifp, &starup->sg); | |
1445 | else | |
1446 | starch = NULL; | |
1447 | ||
1448 | if (!ch && !starch) | |
1449 | continue; | |
1450 | ||
1451 | if (pim_upstream_evaluate_join_desired_interface (up, ch, starch)) | |
1452 | { | |
781a1745 DS |
1453 | int flag = PIM_OIF_FLAG_PROTO_PIM; |
1454 | ||
c8fc07cb | 1455 | if (!ch) |
781a1745 | 1456 | flag = PIM_OIF_FLAG_PROTO_STAR; |
c8fc07cb DS |
1457 | |
1458 | pim_channel_add_oif (up->channel_oil, ifp, flag); | |
1459 | output_intf++; | |
1460 | } | |
219e0013 DS |
1461 | } |
1462 | ||
b5183fd1 DS |
1463 | return output_intf; |
1464 | } | |
1465 | ||
1466 | /* | |
1467 | * For a given upstream, determine the inherited_olist | |
1468 | * and apply it. | |
1469 | * | |
1470 | * inherited_olist(S,G,rpt) = | |
1471 | * ( joins(*,*,RP(G)) (+) joins(*,G) (-) prunes(S,G,rpt) ) | |
1472 | * (+) ( pim_include(*,G) (-) pim_exclude(S,G)) | |
1473 | * (-) ( lost_assert(*,G) (+) lost_assert(S,G,rpt) ) | |
1474 | * | |
1475 | * inherited_olist(S,G) = | |
1476 | * inherited_olist(S,G,rpt) (+) | |
1477 | * joins(S,G) (+) pim_include(S,G) (-) lost_assert(S,G) | |
1478 | * | |
1479 | * return 1 if there are any output interfaces | |
1480 | * return 0 if there are not any output interfaces | |
1481 | */ | |
1482 | int | |
1483 | pim_upstream_inherited_olist (struct pim_upstream *up) | |
1484 | { | |
1485 | int output_intf = pim_upstream_inherited_olist_decide (up); | |
1486 | ||
483eef9d DS |
1487 | /* |
1488 | * If we have output_intf switch state to Join and work like normal | |
1489 | * If we don't have an output_intf that means we are probably a | |
1490 | * switch on a stick so turn on forwarding to just accept the | |
1491 | * incoming packets so we don't bother the other stuff! | |
1492 | */ | |
1493 | if (output_intf) | |
1494 | pim_upstream_switch (up, PIM_UPSTREAM_JOINED); | |
1495 | else | |
1496 | forward_on (up); | |
219e0013 DS |
1497 | |
1498 | return output_intf; | |
4fdc8f36 | 1499 | } |
d3dd1804 | 1500 | |
80d9c3a0 DS |
1501 | int |
1502 | pim_upstream_empty_inherited_olist (struct pim_upstream *up) | |
1503 | { | |
ce0ddb4e | 1504 | return pim_channel_oil_empty (up->channel_oil); |
80d9c3a0 DS |
1505 | } |
1506 | ||
d3dd1804 DS |
1507 | /* |
1508 | * When we have a new neighbor, | |
1509 | * find upstreams that don't have their rpf_addr | |
1510 | * set and see if the new neighbor allows | |
1511 | * the join to be sent | |
1512 | */ | |
1513 | void | |
1514 | pim_upstream_find_new_rpf (void) | |
1515 | { | |
1516 | struct listnode *up_node; | |
1517 | struct listnode *up_nextnode; | |
1518 | struct pim_upstream *up; | |
1519 | ||
1520 | /* | |
0f588989 DS |
1521 | * Scan all (S,G) upstreams searching for RPF'(S,G)=neigh_addr |
1522 | */ | |
1523 | for (ALL_LIST_ELEMENTS(pim_upstream_list, up_node, up_nextnode, up)) | |
d3dd1804 | 1524 | { |
63c59d0c | 1525 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) |
d3dd1804 | 1526 | { |
3197cb1e | 1527 | if (PIM_DEBUG_TRACE) |
d3dd1804 | 1528 | zlog_debug ("Upstream %s without a path to send join, checking", |
8bfb8b67 | 1529 | up->sg_str); |
1bc98276 | 1530 | pim_rpf_update (up, NULL, 1); |
d3dd1804 DS |
1531 | } |
1532 | } | |
1533 | } | |
0f588989 | 1534 | |
0f588989 DS |
1535 | static unsigned int |
1536 | pim_upstream_hash_key (void *arg) | |
1537 | { | |
1538 | struct pim_upstream *up = (struct pim_upstream *)arg; | |
1539 | ||
1540 | return jhash_2words (up->sg.src.s_addr, up->sg.grp.s_addr, 0); | |
1541 | } | |
1542 | ||
1543 | void pim_upstream_terminate (void) | |
1544 | { | |
1545 | if (pim_upstream_list) | |
693c9259 | 1546 | list_delete (pim_upstream_list); |
0f588989 DS |
1547 | pim_upstream_list = NULL; |
1548 | ||
1549 | if (pim_upstream_hash) | |
1550 | hash_free (pim_upstream_hash); | |
693c9259 | 1551 | pim_upstream_hash = NULL; |
0f588989 DS |
1552 | } |
1553 | ||
1554 | static int | |
1555 | pim_upstream_equal (const void *arg1, const void *arg2) | |
1556 | { | |
1557 | const struct pim_upstream *up1 = (const struct pim_upstream *)arg1; | |
1558 | const struct pim_upstream *up2 = (const struct pim_upstream *)arg2; | |
1559 | ||
1560 | if ((up1->sg.grp.s_addr == up2->sg.grp.s_addr) && | |
1561 | (up1->sg.src.s_addr == up2->sg.src.s_addr)) | |
1562 | return 1; | |
1563 | ||
1564 | return 0; | |
1565 | } | |
1566 | ||
1bf16443 | 1567 | /* rfc4601:section-4.2:"Data Packet Forwarding Rules" defines |
1568 | * the cases where kat has to be restarted on rxing traffic - | |
1569 | * | |
1570 | * if( DirectlyConnected(S) == TRUE AND iif == RPF_interface(S) ) { | |
1571 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1572 | * # Note: a register state transition or UpstreamJPState(S,G) | |
1573 | * # transition may happen as a result of restarting | |
1574 | * # KeepaliveTimer, and must be dealt with here. | |
1575 | * } | |
1576 | * if( iif == RPF_interface(S) AND UpstreamJPState(S,G) == Joined AND | |
1577 | * inherited_olist(S,G) != NULL ) { | |
1578 | * set KeepaliveTimer(S,G) to Keepalive_Period | |
1579 | * } | |
1580 | */ | |
1581 | static bool pim_upstream_kat_start_ok(struct pim_upstream *up) | |
1582 | { | |
1583 | /* "iif == RPF_interface(S)" check has to be done by the kernel or hw | |
1584 | * so we will skip that here */ | |
1585 | if (pim_if_connected_to_source(up->rpf.source_nexthop.interface, | |
1586 | up->sg.src)) { | |
1587 | return true; | |
1588 | } | |
1589 | ||
1590 | if ((up->join_state == PIM_UPSTREAM_JOINED) && | |
1591 | !pim_upstream_empty_inherited_olist(up)) { | |
1592 | /* XXX: I have added this RP check just for 3.2 and it's a digression from | |
1593 | * what rfc-4601 says. Till now we were only running KAT on FHR and RP and | |
1594 | * there is some angst around making the change to run it all routers that | |
1595 | * maintain the (S, G) state. This is tracked via CM-13601 and MUST be | |
1596 | * removed to handle spt turn-arounds correctly in a 3-tier clos */ | |
1597 | if (I_am_RP (up->sg.grp)) | |
1598 | return true; | |
1599 | } | |
1600 | ||
1601 | return false; | |
1602 | } | |
1603 | ||
9c5e4d62 DS |
1604 | /* |
1605 | * Code to check and see if we've received packets on a S,G mroute | |
1606 | * and if so to set the SPT bit appropriately | |
1607 | */ | |
1608 | static void | |
1609 | pim_upstream_sg_running (void *arg) | |
1610 | { | |
1611 | struct pim_upstream *up = (struct pim_upstream *)arg; | |
e43b8697 DS |
1612 | |
1613 | // No packet can have arrived here if this is the case | |
1614 | if (!up->channel_oil || !up->channel_oil->installed) | |
1615 | { | |
1616 | if (PIM_DEBUG_TRACE) | |
1617 | zlog_debug ("%s: %s is not installed in mroute", | |
8bfb8b67 | 1618 | __PRETTY_FUNCTION__, up->sg_str); |
e43b8697 DS |
1619 | return; |
1620 | } | |
1621 | ||
bfdf4096 DS |
1622 | /* |
1623 | * This is a bit of a hack | |
1624 | * We've noted that we should rescan but | |
1625 | * we've missed the window for doing so in | |
1626 | * pim_zebra.c for some reason. I am | |
1627 | * only doing this at this point in time | |
1628 | * to get us up and working for the moment | |
1629 | */ | |
1630 | if (up->channel_oil->oil_inherited_rescan) | |
1631 | { | |
1632 | if (PIM_DEBUG_TRACE) | |
1633 | zlog_debug ("%s: Handling unscanned inherited_olist for %s", __PRETTY_FUNCTION__, up->sg_str); | |
1634 | pim_upstream_inherited_olist_decide (up); | |
1635 | up->channel_oil->oil_inherited_rescan = 0; | |
1636 | } | |
e43b8697 DS |
1637 | pim_mroute_update_counters (up->channel_oil); |
1638 | ||
1639 | // Have we seen packets? | |
1bf16443 | 1640 | if ((up->channel_oil->cc.oldpktcnt >= up->channel_oil->cc.pktcnt) && |
e43b8697 DS |
1641 | (up->channel_oil->cc.lastused/100 > 30)) |
1642 | { | |
1643 | if (PIM_DEBUG_TRACE) | |
1644 | { | |
eeedae06 DS |
1645 | zlog_debug ("%s: %s old packet count is equal or lastused is greater than 30, (%ld,%ld,%lld)", |
1646 | __PRETTY_FUNCTION__, up->sg_str, | |
1647 | up->channel_oil->cc.oldpktcnt, | |
1648 | up->channel_oil->cc.pktcnt, | |
1649 | up->channel_oil->cc.lastused/100); | |
e43b8697 DS |
1650 | } |
1651 | return; | |
1652 | } | |
1653 | ||
850a9f99 | 1654 | if (pim_upstream_kat_start_ok(up)) |
1bf16443 | 1655 | { |
850a9f99 DS |
1656 | /* Add a source reference to the stream if |
1657 | * one doesn't already exist */ | |
1658 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_STREAM(up->flags)) | |
1659 | { | |
1660 | if (PIM_DEBUG_TRACE) | |
1661 | zlog_debug ("source reference created on kat restart %s", up->sg_str); | |
8bfb8b67 | 1662 | |
55785900 | 1663 | pim_upstream_ref(up, PIM_UPSTREAM_FLAG_MASK_SRC_STREAM, __PRETTY_FUNCTION__); |
850a9f99 DS |
1664 | PIM_UPSTREAM_FLAG_SET_SRC_STREAM(up->flags); |
1665 | pim_upstream_fhr_kat_start(up); | |
1666 | } | |
1667 | pim_upstream_keep_alive_timer_start(up, qpim_keep_alive_time); | |
1bf16443 | 1668 | } |
850a9f99 | 1669 | else if (PIM_UPSTREAM_FLAG_TEST_SRC_LHR(up->flags)) |
1bf16443 | 1670 | pim_upstream_keep_alive_timer_start(up, qpim_keep_alive_time); |
1bf16443 | 1671 | |
1672 | if (up->sptbit != PIM_UPSTREAM_SPTBIT_TRUE) | |
850a9f99 DS |
1673 | { |
1674 | pim_upstream_set_sptbit(up, up->rpf.source_nexthop.interface); | |
1675 | } | |
e43b8697 | 1676 | return; |
9c5e4d62 DS |
1677 | } |
1678 | ||
a7b2b1e2 DS |
1679 | void |
1680 | pim_upstream_add_lhr_star_pimreg (void) | |
1681 | { | |
1682 | struct pim_upstream *up; | |
1683 | struct listnode *node; | |
1684 | ||
1685 | for (ALL_LIST_ELEMENTS_RO (pim_upstream_list, node, up)) | |
1686 | { | |
1687 | if (up->sg.src.s_addr != INADDR_ANY) | |
1688 | continue; | |
1689 | ||
1690 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_IGMP (up->flags)) | |
1691 | continue; | |
1692 | ||
1693 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_IGMP); | |
1694 | } | |
1695 | } | |
1696 | ||
1697 | void | |
df94f9a9 DS |
1698 | pim_upstream_spt_prefix_list_update (struct prefix_list *pl) |
1699 | { | |
1700 | const char *pname = prefix_list_name (pl); | |
1701 | ||
1702 | if (pimg->spt.plist && strcmp (pimg->spt.plist, pname) == 0) | |
1703 | { | |
1704 | pim_upstream_remove_lhr_star_pimreg (pname); | |
1705 | } | |
1706 | } | |
1707 | ||
1708 | /* | |
1709 | * nlist -> The new prefix list | |
1710 | * | |
1711 | * Per Group Application of pimreg to the OIL | |
1712 | * If the prefix list tells us DENY then | |
1713 | * we need to Switchover to SPT immediate | |
1714 | * so add the pimreg. | |
1715 | * If the prefix list tells us to ACCEPT than | |
1716 | * we need to Never do the SPT so remove | |
1717 | * the interface | |
1718 | * | |
1719 | */ | |
1720 | void | |
1721 | pim_upstream_remove_lhr_star_pimreg (const char *nlist) | |
a7b2b1e2 DS |
1722 | { |
1723 | struct pim_upstream *up; | |
1724 | struct listnode *node; | |
df94f9a9 DS |
1725 | struct prefix_list *np; |
1726 | struct prefix g; | |
1727 | enum prefix_list_type apply_new; | |
1728 | ||
1729 | np = prefix_list_lookup (AFI_IP, nlist); | |
1730 | ||
1731 | g.family = AF_INET; | |
1732 | g.prefixlen = IPV4_MAX_PREFIXLEN; | |
a7b2b1e2 DS |
1733 | |
1734 | for (ALL_LIST_ELEMENTS_RO (pim_upstream_list, node, up)) | |
1735 | { | |
1736 | if (up->sg.src.s_addr != INADDR_ANY) | |
1737 | continue; | |
1738 | ||
1739 | if (!PIM_UPSTREAM_FLAG_TEST_SRC_IGMP (up->flags)) | |
1740 | continue; | |
1741 | ||
df94f9a9 DS |
1742 | if (!nlist) |
1743 | { | |
1744 | pim_channel_del_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_IGMP); | |
1745 | continue; | |
1746 | } | |
1747 | g.u.prefix4 = up->sg.grp; | |
1748 | apply_new = prefix_list_apply (np, &g); | |
1749 | if (apply_new == PREFIX_DENY) | |
1750 | pim_channel_add_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_IGMP); | |
1751 | else | |
1752 | pim_channel_del_oif (up->channel_oil, pim_regiface, PIM_OIF_FLAG_PROTO_IGMP); | |
a7b2b1e2 DS |
1753 | } |
1754 | } | |
1755 | ||
040d86ad DS |
1756 | void |
1757 | pim_upstream_init (void) | |
0f588989 | 1758 | { |
9c5e4d62 DS |
1759 | pim_upstream_sg_wheel = wheel_init (master, 31000, 100, |
1760 | pim_upstream_hash_key, | |
1761 | pim_upstream_sg_running); | |
0f588989 | 1762 | pim_upstream_hash = hash_create_size (8192, pim_upstream_hash_key, |
dfd19ccc | 1763 | pim_upstream_equal, NULL); |
0f588989 DS |
1764 | |
1765 | pim_upstream_list = list_new (); | |
1766 | pim_upstream_list->del = (void (*)(void *)) pim_upstream_free; | |
03417ccd | 1767 | pim_upstream_list->cmp = pim_upstream_compare; |
0f588989 DS |
1768 | |
1769 | } |