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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 "linklist.h" | |
25 | #include "thread.h" | |
26 | #include "memory.h" | |
744d91b3 | 27 | #include "if.h" |
c8507a16 | 28 | #include "vrf.h" |
12e41d03 DL |
29 | |
30 | #include "pimd.h" | |
31 | #include "pim_str.h" | |
32 | #include "pim_iface.h" | |
33 | #include "pim_ifchannel.h" | |
34 | #include "pim_zebra.h" | |
35 | #include "pim_time.h" | |
36 | #include "pim_msg.h" | |
37 | #include "pim_pim.h" | |
38 | #include "pim_join.h" | |
39 | #include "pim_rpf.h" | |
40 | #include "pim_macro.h" | |
dfbbce1d | 41 | #include "pim_oil.h" |
4a40c37a | 42 | #include "pim_upstream.h" |
12e41d03 | 43 | |
1a10fc74 DS |
44 | /* |
45 | * A (*,G) or a (*,*) is going away | |
46 | * remove the parent pointer from | |
47 | * those pointing at us | |
48 | */ | |
49 | static void | |
50 | pim_ifchannel_remove_children (struct pim_ifchannel *ch) | |
51 | { | |
52 | struct pim_interface *pim_ifp = ch->interface->info; | |
53 | struct listnode *ch_node; | |
54 | struct pim_ifchannel *child; | |
55 | ||
56 | // Basic sanity, (*,*) not currently supported | |
4ed0af70 DS |
57 | if ((ch->sg.src.s_addr == INADDR_ANY) && |
58 | (ch->sg.grp.s_addr == INADDR_ANY)) | |
1a10fc74 DS |
59 | return; |
60 | ||
61 | // Basic sanity (S,G) have no children | |
4ed0af70 DS |
62 | if ((ch->sg.src.s_addr != INADDR_ANY) && |
63 | (ch->sg.grp.s_addr != INADDR_ANY)) | |
1a10fc74 DS |
64 | return; |
65 | ||
66 | for (ALL_LIST_ELEMENTS_RO (pim_ifp->pim_ifchannel_list, ch_node, child)) | |
67 | { | |
68 | if (child->parent == ch) | |
69 | child->parent = NULL; | |
70 | } | |
71 | } | |
72 | ||
73 | /* | |
74 | * A (*,G) or a (*,*) is being created | |
75 | * find all the children that would point | |
76 | * at us. | |
77 | */ | |
78 | static void | |
79 | pim_ifchannel_find_new_children (struct pim_ifchannel *ch) | |
80 | { | |
81 | struct pim_interface *pim_ifp = ch->interface->info; | |
82 | struct pim_ifchannel *child; | |
83 | struct listnode *ch_node; | |
84 | ||
85 | // Basic Sanity that we are not being silly | |
4ed0af70 DS |
86 | if ((ch->sg.src.s_addr != INADDR_ANY) && |
87 | (ch->sg.grp.s_addr != INADDR_ANY)) | |
1a10fc74 DS |
88 | return; |
89 | ||
4ed0af70 DS |
90 | if ((ch->sg.src.s_addr == INADDR_ANY) && |
91 | (ch->sg.grp.s_addr == INADDR_ANY)) | |
1a10fc74 DS |
92 | return; |
93 | ||
94 | for (ALL_LIST_ELEMENTS_RO (pim_ifp->pim_ifchannel_list, ch_node, child)) | |
95 | { | |
4ed0af70 DS |
96 | if ((ch->sg.grp.s_addr != INADDR_ANY) && |
97 | (child->sg.grp.s_addr == ch->sg.grp.s_addr) && | |
1a10fc74 DS |
98 | (child != ch)) |
99 | child->parent = ch; | |
100 | } | |
101 | } | |
102 | ||
12e41d03 DL |
103 | void pim_ifchannel_free(struct pim_ifchannel *ch) |
104 | { | |
105 | zassert(!ch->t_ifjoin_expiry_timer); | |
106 | zassert(!ch->t_ifjoin_prune_pending_timer); | |
107 | zassert(!ch->t_ifassert_timer); | |
108 | ||
109 | XFREE(MTYPE_PIM_IFCHANNEL, ch); | |
110 | } | |
111 | ||
112 | void pim_ifchannel_delete(struct pim_ifchannel *ch) | |
113 | { | |
114 | struct pim_interface *pim_ifp; | |
115 | ||
116 | pim_ifp = ch->interface->info; | |
117 | zassert(pim_ifp); | |
118 | ||
1a10fc74 DS |
119 | /* |
120 | * When this channel is removed | |
121 | * we need to find all our children | |
122 | * and make sure our pointers are fixed | |
123 | */ | |
124 | pim_ifchannel_remove_children (ch); | |
125 | ||
12e41d03 DL |
126 | if (ch->ifjoin_state != PIM_IFJOIN_NOINFO) { |
127 | pim_upstream_update_join_desired(ch->upstream); | |
128 | } | |
129 | ||
130 | pim_upstream_del(ch->upstream); | |
5ce79466 | 131 | ch->upstream = NULL; |
12e41d03 DL |
132 | |
133 | THREAD_OFF(ch->t_ifjoin_expiry_timer); | |
134 | THREAD_OFF(ch->t_ifjoin_prune_pending_timer); | |
135 | THREAD_OFF(ch->t_ifassert_timer); | |
136 | ||
137 | /* | |
138 | notice that listnode_delete() can't be moved | |
139 | into pim_ifchannel_free() because the later is | |
140 | called by list_delete_all_node() | |
141 | */ | |
142 | listnode_delete(pim_ifp->pim_ifchannel_list, ch); | |
143 | ||
144 | pim_ifchannel_free(ch); | |
145 | } | |
146 | ||
147 | #define IFCHANNEL_NOINFO(ch) \ | |
148 | ( \ | |
149 | ((ch)->local_ifmembership == PIM_IFMEMBERSHIP_NOINFO) \ | |
150 | && \ | |
151 | ((ch)->ifjoin_state == PIM_IFJOIN_NOINFO) \ | |
152 | && \ | |
153 | ((ch)->ifassert_state == PIM_IFASSERT_NOINFO) \ | |
154 | ) | |
155 | ||
156 | static void delete_on_noinfo(struct pim_ifchannel *ch) | |
157 | { | |
158 | if (IFCHANNEL_NOINFO(ch)) { | |
159 | ||
160 | /* In NOINFO state, timers should have been cleared */ | |
161 | zassert(!ch->t_ifjoin_expiry_timer); | |
162 | zassert(!ch->t_ifjoin_prune_pending_timer); | |
163 | zassert(!ch->t_ifassert_timer); | |
164 | ||
165 | pim_ifchannel_delete(ch); | |
166 | } | |
167 | } | |
168 | ||
169 | void pim_ifchannel_ifjoin_switch(const char *caller, | |
170 | struct pim_ifchannel *ch, | |
171 | enum pim_ifjoin_state new_state) | |
172 | { | |
173 | enum pim_ifjoin_state old_state = ch->ifjoin_state; | |
174 | ||
04329d4e DS |
175 | if (PIM_DEBUG_PIM_EVENTS) |
176 | zlog_debug ("PIM_IFCHANNEL: %s is switching from %s to %s", | |
177 | pim_str_sg_dump (&ch->sg), | |
178 | pim_ifchannel_ifjoin_name (ch->ifjoin_state), | |
179 | pim_ifchannel_ifjoin_name (new_state)); | |
180 | ||
181 | ||
12e41d03 | 182 | if (old_state == new_state) { |
7adf0260 DS |
183 | if (PIM_DEBUG_PIM_EVENTS) { |
184 | zlog_debug("%s calledby %s: non-transition on state %d (%s)", | |
185 | __PRETTY_FUNCTION__, caller, new_state, | |
186 | pim_ifchannel_ifjoin_name(new_state)); | |
187 | } | |
12e41d03 DL |
188 | return; |
189 | } | |
190 | ||
12e41d03 DL |
191 | ch->ifjoin_state = new_state; |
192 | ||
193 | /* Transition to/from NOINFO ? */ | |
194 | if ( | |
195 | (old_state == PIM_IFJOIN_NOINFO) | |
196 | || | |
197 | (new_state == PIM_IFJOIN_NOINFO) | |
198 | ) { | |
199 | ||
200 | if (PIM_DEBUG_PIM_EVENTS) { | |
ee1a477a | 201 | zlog_debug("PIM_IFCHANNEL_%s: (S,G)=%s on interface %s", |
12e41d03 | 202 | ((new_state == PIM_IFJOIN_NOINFO) ? "DOWN" : "UP"), |
ee1a477a | 203 | pim_str_sg_dump (&ch->sg), ch->interface->name); |
12e41d03 DL |
204 | } |
205 | ||
206 | /* | |
207 | Record uptime of state transition to/from NOINFO | |
208 | */ | |
209 | ch->ifjoin_creation = pim_time_monotonic_sec(); | |
210 | ||
211 | pim_upstream_update_join_desired(ch->upstream); | |
212 | pim_ifchannel_update_could_assert(ch); | |
213 | pim_ifchannel_update_assert_tracking_desired(ch); | |
214 | } | |
215 | } | |
216 | ||
217 | const char *pim_ifchannel_ifjoin_name(enum pim_ifjoin_state ifjoin_state) | |
218 | { | |
219 | switch (ifjoin_state) { | |
220 | case PIM_IFJOIN_NOINFO: return "NOINFO"; | |
221 | case PIM_IFJOIN_JOIN: return "JOIN"; | |
222 | case PIM_IFJOIN_PRUNE_PENDING: return "PRUNEP"; | |
223 | } | |
224 | ||
225 | return "ifjoin_bad_state"; | |
226 | } | |
227 | ||
228 | const char *pim_ifchannel_ifassert_name(enum pim_ifassert_state ifassert_state) | |
229 | { | |
230 | switch (ifassert_state) { | |
231 | case PIM_IFASSERT_NOINFO: return "NOINFO"; | |
232 | case PIM_IFASSERT_I_AM_WINNER: return "WINNER"; | |
233 | case PIM_IFASSERT_I_AM_LOSER: return "LOSER"; | |
234 | } | |
235 | ||
236 | return "ifassert_bad_state"; | |
237 | } | |
238 | ||
239 | /* | |
240 | RFC 4601: 4.6.5. Assert State Macros | |
241 | ||
242 | AssertWinner(S,G,I) defaults to NULL and AssertWinnerMetric(S,G,I) | |
243 | defaults to Infinity when in the NoInfo state. | |
244 | */ | |
245 | void reset_ifassert_state(struct pim_ifchannel *ch) | |
246 | { | |
247 | THREAD_OFF(ch->t_ifassert_timer); | |
248 | ||
249 | pim_ifassert_winner_set(ch, | |
250 | PIM_IFASSERT_NOINFO, | |
251 | qpim_inaddr_any, | |
252 | qpim_infinite_assert_metric); | |
253 | } | |
254 | ||
12e41d03 | 255 | struct pim_ifchannel *pim_ifchannel_find(struct interface *ifp, |
4ed0af70 | 256 | struct prefix_sg *sg) |
12e41d03 DL |
257 | { |
258 | struct pim_interface *pim_ifp; | |
259 | struct listnode *ch_node; | |
260 | struct pim_ifchannel *ch; | |
261 | ||
262 | zassert(ifp); | |
263 | ||
264 | pim_ifp = ifp->info; | |
265 | ||
266 | if (!pim_ifp) { | |
5074a423 | 267 | zlog_warn("%s: (S,G)=%s: multicast not enabled on interface %s", |
12e41d03 | 268 | __PRETTY_FUNCTION__, |
5074a423 | 269 | pim_str_sg_dump (sg), |
12e41d03 DL |
270 | ifp->name); |
271 | return 0; | |
272 | } | |
273 | ||
274 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->pim_ifchannel_list, ch_node, ch)) { | |
275 | if ( | |
4ed0af70 DS |
276 | (sg->src.s_addr == ch->sg.src.s_addr) && |
277 | (sg->grp.s_addr == ch->sg.grp.s_addr) | |
12e41d03 DL |
278 | ) { |
279 | return ch; | |
280 | } | |
281 | } | |
282 | ||
283 | return 0; | |
284 | } | |
285 | ||
286 | static void ifmembership_set(struct pim_ifchannel *ch, | |
287 | enum pim_ifmembership membership) | |
288 | { | |
289 | if (ch->local_ifmembership == membership) | |
290 | return; | |
291 | ||
7adf0260 | 292 | if (PIM_DEBUG_PIM_EVENTS) { |
ee1a477a | 293 | zlog_debug("%s: (S,G)=%s membership now is %s on interface %s", |
12e41d03 | 294 | __PRETTY_FUNCTION__, |
ee1a477a | 295 | pim_str_sg_dump (&ch->sg), |
12e41d03 DL |
296 | membership == PIM_IFMEMBERSHIP_INCLUDE ? "INCLUDE" : "NOINFO", |
297 | ch->interface->name); | |
298 | } | |
299 | ||
300 | ch->local_ifmembership = membership; | |
301 | ||
302 | pim_upstream_update_join_desired(ch->upstream); | |
303 | pim_ifchannel_update_could_assert(ch); | |
304 | pim_ifchannel_update_assert_tracking_desired(ch); | |
305 | } | |
306 | ||
307 | ||
308 | void pim_ifchannel_membership_clear(struct interface *ifp) | |
309 | { | |
310 | struct pim_interface *pim_ifp; | |
311 | struct listnode *ch_node; | |
312 | struct pim_ifchannel *ch; | |
313 | ||
314 | pim_ifp = ifp->info; | |
315 | zassert(pim_ifp); | |
316 | ||
317 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->pim_ifchannel_list, ch_node, ch)) { | |
318 | ifmembership_set(ch, PIM_IFMEMBERSHIP_NOINFO); | |
319 | } | |
320 | } | |
321 | ||
322 | void pim_ifchannel_delete_on_noinfo(struct interface *ifp) | |
323 | { | |
324 | struct pim_interface *pim_ifp; | |
325 | struct listnode *node; | |
326 | struct listnode *next_node; | |
327 | struct pim_ifchannel *ch; | |
328 | ||
329 | pim_ifp = ifp->info; | |
330 | zassert(pim_ifp); | |
331 | ||
332 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, node, next_node, ch)) { | |
333 | delete_on_noinfo(ch); | |
334 | } | |
335 | } | |
336 | ||
1a10fc74 DS |
337 | /* |
338 | * For a given Interface, if we are given a S,G | |
339 | * Find the *,G (If we have it). | |
340 | * If we are passed a *,G, find the *,* ifchannel | |
341 | * if we have it. | |
342 | */ | |
343 | static struct pim_ifchannel * | |
344 | pim_ifchannel_find_parent (struct interface *ifp, | |
4ed0af70 | 345 | struct prefix_sg *sg) |
1a10fc74 | 346 | { |
4ed0af70 | 347 | struct prefix_sg parent_sg = *sg; |
1a10fc74 DS |
348 | |
349 | // (*,*) || (S,*) | |
4ed0af70 DS |
350 | if (((sg->src.s_addr == INADDR_ANY) && |
351 | (sg->grp.s_addr == INADDR_ANY)) || | |
352 | ((sg->src.s_addr != INADDR_ANY) && | |
353 | (sg->grp.s_addr == INADDR_ANY))) | |
1a10fc74 DS |
354 | return NULL; |
355 | ||
356 | // (S,G) | |
4ed0af70 DS |
357 | if ((sg->src.s_addr != INADDR_ANY) && |
358 | (sg->grp.s_addr != INADDR_ANY)) | |
1a10fc74 | 359 | { |
4ed0af70 | 360 | parent_sg.src.s_addr = INADDR_ANY; |
1a10fc74 DS |
361 | return pim_ifchannel_find (ifp, &parent_sg); |
362 | } | |
363 | ||
364 | // (*,G) -- Not going to find anything currently | |
4ed0af70 | 365 | parent_sg.grp.s_addr = INADDR_ANY; |
1a10fc74 DS |
366 | return pim_ifchannel_find (ifp, &parent_sg); |
367 | } | |
368 | ||
369 | struct pim_ifchannel * | |
370 | pim_ifchannel_add(struct interface *ifp, | |
4a40c37a | 371 | struct prefix_sg *sg, int flags) |
12e41d03 | 372 | { |
535db05b | 373 | struct pim_interface *pim_ifp; |
12e41d03 | 374 | struct pim_ifchannel *ch; |
535db05b | 375 | struct pim_upstream *up; |
12e41d03 | 376 | |
5074a423 | 377 | ch = pim_ifchannel_find(ifp, sg); |
12e41d03 DL |
378 | if (ch) |
379 | return ch; | |
380 | ||
535db05b DS |
381 | pim_ifp = ifp->info; |
382 | zassert(pim_ifp); | |
383 | ||
4a40c37a | 384 | up = pim_upstream_add(sg, NULL, flags); |
535db05b | 385 | if (!up) { |
5074a423 | 386 | zlog_err("%s: could not attach upstream (S,G)=%s on interface %s", |
535db05b | 387 | __PRETTY_FUNCTION__, |
5074a423 | 388 | pim_str_sg_dump (sg), ifp->name); |
535db05b DS |
389 | return NULL; |
390 | } | |
391 | ||
392 | ch = XMALLOC(MTYPE_PIM_IFCHANNEL, sizeof(*ch)); | |
393 | if (!ch) { | |
5074a423 | 394 | zlog_warn("%s: pim_ifchannel_new() failure for (S,G)=%s on interface %s", |
535db05b | 395 | __PRETTY_FUNCTION__, |
5074a423 | 396 | pim_str_sg_dump (sg), ifp->name); |
12e41d03 | 397 | |
535db05b DS |
398 | return NULL; |
399 | } | |
12e41d03 | 400 | |
535db05b DS |
401 | ch->flags = 0; |
402 | ch->upstream = up; | |
403 | ch->interface = ifp; | |
5074a423 | 404 | ch->sg = *sg; |
1a10fc74 DS |
405 | ch->parent = pim_ifchannel_find_parent (ifp, sg); |
406 | pim_ifchannel_find_new_children (ch); | |
535db05b DS |
407 | ch->local_ifmembership = PIM_IFMEMBERSHIP_NOINFO; |
408 | ||
409 | ch->ifjoin_state = PIM_IFJOIN_NOINFO; | |
410 | ch->t_ifjoin_expiry_timer = NULL; | |
411 | ch->t_ifjoin_prune_pending_timer = NULL; | |
412 | ch->ifjoin_creation = 0; | |
413 | ||
414 | ch->ifassert_my_metric = pim_macro_ch_my_assert_metric_eval(ch); | |
415 | ch->ifassert_winner_metric = pim_macro_ch_my_assert_metric_eval (ch); | |
416 | ||
417 | ch->ifassert_winner.s_addr = 0; | |
418 | ||
419 | /* Assert state */ | |
420 | ch->t_ifassert_timer = NULL; | |
421 | reset_ifassert_state(ch); | |
422 | if (pim_macro_ch_could_assert_eval(ch)) | |
423 | PIM_IF_FLAG_SET_COULD_ASSERT(ch->flags); | |
424 | else | |
425 | PIM_IF_FLAG_UNSET_COULD_ASSERT(ch->flags); | |
426 | ||
427 | if (pim_macro_assert_tracking_desired_eval(ch)) | |
428 | PIM_IF_FLAG_SET_ASSERT_TRACKING_DESIRED(ch->flags); | |
429 | else | |
430 | PIM_IF_FLAG_UNSET_ASSERT_TRACKING_DESIRED(ch->flags); | |
431 | ||
432 | /* Attach to list */ | |
bbd64ce1 | 433 | listnode_add_sort(pim_ifp->pim_ifchannel_list, ch); |
535db05b DS |
434 | |
435 | zassert(IFCHANNEL_NOINFO(ch)); | |
436 | ||
437 | return ch; | |
12e41d03 DL |
438 | } |
439 | ||
440 | static void ifjoin_to_noinfo(struct pim_ifchannel *ch) | |
441 | { | |
442 | pim_forward_stop(ch); | |
443 | pim_ifchannel_ifjoin_switch(__PRETTY_FUNCTION__, ch, PIM_IFJOIN_NOINFO); | |
444 | delete_on_noinfo(ch); | |
445 | } | |
446 | ||
447 | static int on_ifjoin_expiry_timer(struct thread *t) | |
448 | { | |
449 | struct pim_ifchannel *ch; | |
450 | ||
451 | zassert(t); | |
452 | ch = THREAD_ARG(t); | |
453 | zassert(ch); | |
454 | ||
59ba0ac3 | 455 | ch->t_ifjoin_expiry_timer = NULL; |
12e41d03 DL |
456 | |
457 | zassert(ch->ifjoin_state == PIM_IFJOIN_JOIN); | |
458 | ||
459 | ifjoin_to_noinfo(ch); | |
460 | /* ch may have been deleted */ | |
461 | ||
462 | return 0; | |
463 | } | |
464 | ||
12e41d03 DL |
465 | static int on_ifjoin_prune_pending_timer(struct thread *t) |
466 | { | |
467 | struct pim_ifchannel *ch; | |
468 | int send_prune_echo; /* boolean */ | |
469 | struct interface *ifp; | |
470 | struct pim_interface *pim_ifp; | |
4ed0af70 | 471 | struct prefix_sg sg; |
12e41d03 DL |
472 | |
473 | zassert(t); | |
474 | ch = THREAD_ARG(t); | |
475 | zassert(ch); | |
476 | ||
59ba0ac3 | 477 | ch->t_ifjoin_prune_pending_timer = NULL; |
12e41d03 DL |
478 | |
479 | zassert(ch->ifjoin_state == PIM_IFJOIN_PRUNE_PENDING); | |
480 | ||
481 | /* Send PruneEcho(S,G) ? */ | |
482 | ifp = ch->interface; | |
483 | pim_ifp = ifp->info; | |
484 | send_prune_echo = (listcount(pim_ifp->pim_neighbor_list) > 1); | |
485 | ||
486 | /* Save (S,G) */ | |
05e451f8 | 487 | sg = ch->sg; |
12e41d03 DL |
488 | |
489 | ifjoin_to_noinfo(ch); | |
490 | /* from here ch may have been deleted */ | |
491 | ||
492 | if (send_prune_echo) | |
64a70f46 | 493 | pim_joinprune_send (ifp, pim_ifp->primary_address, |
05e451f8 | 494 | &sg, 0); |
12e41d03 DL |
495 | |
496 | return 0; | |
497 | } | |
498 | ||
499 | static void check_recv_upstream(int is_join, | |
500 | struct interface *recv_ifp, | |
501 | struct in_addr upstream, | |
4ed0af70 | 502 | struct prefix_sg *sg, |
12e41d03 DL |
503 | uint8_t source_flags, |
504 | int holdtime) | |
505 | { | |
506 | struct pim_upstream *up; | |
507 | ||
508 | /* Upstream (S,G) in Joined state ? */ | |
01d45d04 | 509 | up = pim_upstream_find(sg); |
12e41d03 DL |
510 | if (!up) |
511 | return; | |
512 | if (up->join_state != PIM_UPSTREAM_JOINED) | |
513 | return; | |
514 | ||
515 | /* Upstream (S,G) in Joined state */ | |
516 | ||
63c59d0c | 517 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { |
12e41d03 | 518 | /* RPF'(S,G) not found */ |
01d45d04 | 519 | zlog_warn("%s %s: RPF'%s not found", |
12e41d03 | 520 | __FILE__, __PRETTY_FUNCTION__, |
01d45d04 | 521 | pim_str_sg_dump (sg)); |
12e41d03 DL |
522 | return; |
523 | } | |
524 | ||
525 | /* upstream directed to RPF'(S,G) ? */ | |
63c59d0c | 526 | if (upstream.s_addr != up->rpf.rpf_addr.u.prefix4.s_addr) { |
12e41d03 DL |
527 | char up_str[100]; |
528 | char rpf_str[100]; | |
12e41d03 | 529 | pim_inet4_dump("<up?>", upstream, up_str, sizeof(up_str)); |
63c59d0c | 530 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_str, sizeof(rpf_str)); |
01d45d04 | 531 | zlog_warn("%s %s: (S,G)=%s upstream=%s not directed to RPF'(S,G)=%s on interface %s", |
12e41d03 | 532 | __FILE__, __PRETTY_FUNCTION__, |
01d45d04 | 533 | pim_str_sg_dump (sg), |
12e41d03 DL |
534 | up_str, rpf_str, recv_ifp->name); |
535 | return; | |
536 | } | |
537 | /* upstream directed to RPF'(S,G) */ | |
538 | ||
539 | if (is_join) { | |
540 | /* Join(S,G) to RPF'(S,G) */ | |
63c59d0c | 541 | pim_upstream_join_suppress(up, up->rpf.rpf_addr.u.prefix4, holdtime); |
12e41d03 DL |
542 | return; |
543 | } | |
544 | ||
545 | /* Prune to RPF'(S,G) */ | |
546 | ||
547 | if (source_flags & PIM_RPT_BIT_MASK) { | |
548 | if (source_flags & PIM_WILDCARD_BIT_MASK) { | |
549 | /* Prune(*,G) to RPF'(S,G) */ | |
550 | pim_upstream_join_timer_decrease_to_t_override("Prune(*,G)", | |
63c59d0c | 551 | up, up->rpf.rpf_addr.u.prefix4); |
12e41d03 DL |
552 | return; |
553 | } | |
554 | ||
555 | /* Prune(S,G,rpt) to RPF'(S,G) */ | |
556 | pim_upstream_join_timer_decrease_to_t_override("Prune(S,G,rpt)", | |
63c59d0c | 557 | up, up->rpf.rpf_addr.u.prefix4); |
12e41d03 DL |
558 | return; |
559 | } | |
560 | ||
561 | /* Prune(S,G) to RPF'(S,G) */ | |
562 | pim_upstream_join_timer_decrease_to_t_override("Prune(S,G)", up, | |
63c59d0c | 563 | up->rpf.rpf_addr.u.prefix4); |
12e41d03 DL |
564 | } |
565 | ||
566 | static int nonlocal_upstream(int is_join, | |
567 | struct interface *recv_ifp, | |
568 | struct in_addr upstream, | |
4ed0af70 | 569 | struct prefix_sg *sg, |
12e41d03 DL |
570 | uint8_t source_flags, |
571 | uint16_t holdtime) | |
572 | { | |
573 | struct pim_interface *recv_pim_ifp; | |
574 | int is_local; /* boolean */ | |
575 | ||
576 | recv_pim_ifp = recv_ifp->info; | |
577 | zassert(recv_pim_ifp); | |
578 | ||
579 | is_local = (upstream.s_addr == recv_pim_ifp->primary_address.s_addr); | |
580 | ||
581 | if (PIM_DEBUG_PIM_TRACE) { | |
582 | char up_str[100]; | |
12e41d03 | 583 | pim_inet4_dump("<upstream?>", upstream, up_str, sizeof(up_str)); |
01d45d04 | 584 | zlog_warn("%s: recv %s (S,G)=%s to %s upstream=%s on %s", |
12e41d03 DL |
585 | __PRETTY_FUNCTION__, |
586 | is_join ? "join" : "prune", | |
01d45d04 | 587 | pim_str_sg_dump (sg), |
12e41d03 DL |
588 | is_local ? "local" : "non-local", |
589 | up_str, recv_ifp->name); | |
590 | } | |
591 | ||
592 | if (is_local) | |
593 | return 0; | |
594 | ||
595 | /* | |
596 | Since recv upstream addr was not directed to our primary | |
597 | address, check if we should react to it in any way. | |
598 | */ | |
01d45d04 | 599 | check_recv_upstream(is_join, recv_ifp, upstream, sg, |
12e41d03 DL |
600 | source_flags, holdtime); |
601 | ||
602 | return 1; /* non-local */ | |
603 | } | |
604 | ||
605 | void pim_ifchannel_join_add(struct interface *ifp, | |
606 | struct in_addr neigh_addr, | |
607 | struct in_addr upstream, | |
4ed0af70 | 608 | struct prefix_sg *sg, |
12e41d03 DL |
609 | uint8_t source_flags, |
610 | uint16_t holdtime) | |
611 | { | |
612 | struct pim_interface *pim_ifp; | |
613 | struct pim_ifchannel *ch; | |
614 | ||
615 | if (nonlocal_upstream(1 /* join */, ifp, upstream, | |
01d45d04 | 616 | sg, source_flags, holdtime)) { |
12e41d03 DL |
617 | return; |
618 | } | |
619 | ||
4a40c37a | 620 | ch = pim_ifchannel_add(ifp, sg, PIM_UPSTREAM_FLAG_MASK_SRC_PIM); |
12e41d03 DL |
621 | if (!ch) |
622 | return; | |
623 | ||
624 | /* | |
625 | RFC 4601: 4.6.1. (S,G) Assert Message State Machine | |
626 | ||
627 | Transitions from "I am Assert Loser" State | |
628 | ||
629 | Receive Join(S,G) on Interface I | |
630 | ||
631 | We receive a Join(S,G) that has the Upstream Neighbor Address | |
632 | field set to my primary IP address on interface I. The action is | |
633 | to transition to NoInfo state, delete this (S,G) assert state | |
634 | (Actions A5 below), and allow the normal PIM Join/Prune mechanisms | |
635 | to operate. | |
636 | ||
637 | Notice: The nonlocal_upstream() test above ensures the upstream | |
638 | address of the join message is our primary address. | |
639 | */ | |
640 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { | |
12e41d03 | 641 | char neigh_str[100]; |
12e41d03 | 642 | pim_inet4_dump("<neigh?>", neigh_addr, neigh_str, sizeof(neigh_str)); |
5074a423 | 643 | zlog_warn("%s: Assert Loser recv Join%s from %s on %s", |
12e41d03 | 644 | __PRETTY_FUNCTION__, |
ee1a477a | 645 | pim_str_sg_dump (sg), neigh_str, ifp->name); |
12e41d03 DL |
646 | |
647 | assert_action_a5(ch); | |
648 | } | |
649 | ||
650 | pim_ifp = ifp->info; | |
651 | zassert(pim_ifp); | |
652 | ||
653 | switch (ch->ifjoin_state) { | |
654 | case PIM_IFJOIN_NOINFO: | |
655 | pim_ifchannel_ifjoin_switch(__PRETTY_FUNCTION__, ch, PIM_IFJOIN_JOIN); | |
656 | if (pim_macro_chisin_oiflist(ch)) { | |
5b668dd7 | 657 | pim_upstream_inherited_olist (ch->upstream); |
12e41d03 DL |
658 | pim_forward_start(ch); |
659 | } | |
660 | break; | |
661 | case PIM_IFJOIN_JOIN: | |
662 | zassert(!ch->t_ifjoin_prune_pending_timer); | |
663 | ||
664 | /* | |
665 | In the JOIN state ch->t_ifjoin_expiry_timer may be NULL due to a | |
666 | previously received join message with holdtime=0xFFFF. | |
667 | */ | |
668 | if (ch->t_ifjoin_expiry_timer) { | |
669 | unsigned long remain = | |
670 | thread_timer_remain_second(ch->t_ifjoin_expiry_timer); | |
671 | if (remain > holdtime) { | |
672 | /* | |
673 | RFC 4601: 4.5.3. Receiving (S,G) Join/Prune Messages | |
674 | ||
675 | Transitions from Join State | |
676 | ||
677 | The (S,G) downstream state machine on interface I remains in | |
678 | Join state, and the Expiry Timer (ET) is restarted, set to | |
679 | maximum of its current value and the HoldTime from the | |
680 | triggering Join/Prune message. | |
681 | ||
682 | Conclusion: Do not change the ET if the current value is | |
683 | higher than the received join holdtime. | |
684 | */ | |
685 | return; | |
686 | } | |
687 | } | |
688 | THREAD_OFF(ch->t_ifjoin_expiry_timer); | |
689 | break; | |
690 | case PIM_IFJOIN_PRUNE_PENDING: | |
691 | zassert(!ch->t_ifjoin_expiry_timer); | |
692 | zassert(ch->t_ifjoin_prune_pending_timer); | |
693 | THREAD_OFF(ch->t_ifjoin_prune_pending_timer); | |
694 | pim_ifchannel_ifjoin_switch(__PRETTY_FUNCTION__, ch, PIM_IFJOIN_JOIN); | |
695 | break; | |
696 | } | |
697 | ||
698 | zassert(!IFCHANNEL_NOINFO(ch)); | |
699 | ||
700 | if (holdtime != 0xFFFF) { | |
701 | THREAD_TIMER_ON(master, ch->t_ifjoin_expiry_timer, | |
702 | on_ifjoin_expiry_timer, | |
703 | ch, holdtime); | |
704 | } | |
705 | } | |
706 | ||
707 | void pim_ifchannel_prune(struct interface *ifp, | |
708 | struct in_addr upstream, | |
4ed0af70 | 709 | struct prefix_sg *sg, |
12e41d03 DL |
710 | uint8_t source_flags, |
711 | uint16_t holdtime) | |
712 | { | |
713 | struct pim_ifchannel *ch; | |
714 | int jp_override_interval_msec; | |
715 | ||
716 | if (nonlocal_upstream(0 /* prune */, ifp, upstream, | |
01d45d04 | 717 | sg, source_flags, holdtime)) { |
12e41d03 DL |
718 | return; |
719 | } | |
720 | ||
4a40c37a | 721 | ch = pim_ifchannel_add(ifp, sg, PIM_UPSTREAM_FLAG_MASK_SRC_PIM); |
12e41d03 DL |
722 | if (!ch) |
723 | return; | |
724 | ||
725 | switch (ch->ifjoin_state) { | |
726 | case PIM_IFJOIN_NOINFO: | |
727 | case PIM_IFJOIN_PRUNE_PENDING: | |
728 | /* nothing to do */ | |
729 | break; | |
730 | case PIM_IFJOIN_JOIN: | |
731 | { | |
732 | struct pim_interface *pim_ifp; | |
733 | ||
734 | pim_ifp = ifp->info; | |
735 | ||
736 | zassert(ch->t_ifjoin_expiry_timer); | |
737 | zassert(!ch->t_ifjoin_prune_pending_timer); | |
738 | ||
739 | THREAD_OFF(ch->t_ifjoin_expiry_timer); | |
740 | ||
741 | pim_ifchannel_ifjoin_switch(__PRETTY_FUNCTION__, ch, PIM_IFJOIN_PRUNE_PENDING); | |
742 | ||
743 | if (listcount(pim_ifp->pim_neighbor_list) > 1) { | |
744 | jp_override_interval_msec = pim_if_jp_override_interval_msec(ifp); | |
745 | } | |
746 | else { | |
747 | jp_override_interval_msec = 0; /* schedule to expire immediately */ | |
748 | /* If we called ifjoin_prune() directly instead, care should | |
749 | be taken not to use "ch" afterwards since it would be | |
750 | deleted. */ | |
751 | } | |
752 | ||
753 | THREAD_TIMER_MSEC_ON(master, ch->t_ifjoin_prune_pending_timer, | |
754 | on_ifjoin_prune_pending_timer, | |
755 | ch, jp_override_interval_msec); | |
756 | ||
757 | zassert(!ch->t_ifjoin_expiry_timer); | |
758 | zassert(ch->t_ifjoin_prune_pending_timer); | |
759 | } | |
760 | break; | |
761 | } | |
762 | ||
763 | } | |
764 | ||
765 | void pim_ifchannel_local_membership_add(struct interface *ifp, | |
4ed0af70 | 766 | struct prefix_sg *sg) |
12e41d03 DL |
767 | { |
768 | struct pim_ifchannel *ch; | |
769 | struct pim_interface *pim_ifp; | |
770 | ||
771 | /* PIM enabled on interface? */ | |
772 | pim_ifp = ifp->info; | |
773 | if (!pim_ifp) | |
774 | return; | |
775 | if (!PIM_IF_TEST_PIM(pim_ifp->options)) | |
776 | return; | |
777 | ||
4a40c37a | 778 | ch = pim_ifchannel_add(ifp, sg, PIM_UPSTREAM_FLAG_MASK_SRC_IGMP); |
12e41d03 DL |
779 | if (!ch) { |
780 | return; | |
781 | } | |
782 | ||
783 | ifmembership_set(ch, PIM_IFMEMBERSHIP_INCLUDE); | |
784 | ||
785 | zassert(!IFCHANNEL_NOINFO(ch)); | |
dfbbce1d DS |
786 | |
787 | if (sg->src.s_addr == INADDR_ANY) | |
788 | { | |
789 | struct pim_upstream *up = pim_upstream_find (sg); | |
790 | struct pim_upstream *child; | |
791 | struct listnode *up_node; | |
792 | ||
0f588989 | 793 | for (ALL_LIST_ELEMENTS_RO (pim_upstream_list, up_node, child)) |
dfbbce1d DS |
794 | { |
795 | if (child->parent == up) | |
796 | { | |
797 | if (PIM_DEBUG_EVENTS) | |
798 | { | |
799 | char buff[100]; | |
800 | ||
801 | strcpy (buff, pim_str_sg_dump (&up->sg)); | |
802 | zlog_debug("%s %s: IGMP (S,G)=%s from %s", | |
803 | __FILE__, __PRETTY_FUNCTION__, | |
804 | buff, pim_str_sg_dump (sg)); | |
805 | } | |
806 | ||
807 | if (pim_upstream_evaluate_join_desired (child)) | |
808 | { | |
809 | pim_channel_add_oif (child->channel_oil, ifp, PIM_OIF_FLAG_PROTO_PIM); | |
810 | pim_upstream_switch (child, PIM_UPSTREAM_JOINED); | |
811 | } | |
812 | } | |
813 | } | |
814 | } | |
12e41d03 DL |
815 | } |
816 | ||
817 | void pim_ifchannel_local_membership_del(struct interface *ifp, | |
4ed0af70 | 818 | struct prefix_sg *sg) |
12e41d03 DL |
819 | { |
820 | struct pim_ifchannel *ch; | |
821 | struct pim_interface *pim_ifp; | |
822 | ||
823 | /* PIM enabled on interface? */ | |
824 | pim_ifp = ifp->info; | |
825 | if (!pim_ifp) | |
826 | return; | |
827 | if (!PIM_IF_TEST_PIM(pim_ifp->options)) | |
828 | return; | |
829 | ||
1103466b | 830 | ch = pim_ifchannel_find(ifp, sg); |
12e41d03 DL |
831 | if (!ch) |
832 | return; | |
833 | ||
834 | ifmembership_set(ch, PIM_IFMEMBERSHIP_NOINFO); | |
835 | ||
dfbbce1d DS |
836 | if (sg->src.s_addr == INADDR_ANY) |
837 | { | |
838 | struct pim_upstream *up = pim_upstream_find (sg); | |
839 | struct pim_upstream *child; | |
840 | struct listnode *up_node; | |
841 | ||
0f588989 | 842 | for (ALL_LIST_ELEMENTS_RO (pim_upstream_list, up_node, child)) |
dfbbce1d DS |
843 | { |
844 | if (child->parent == up) | |
845 | { | |
846 | struct channel_oil *c_oil = child->channel_oil; | |
847 | struct pim_ifchannel *ch = pim_ifchannel_find (ifp, &child->sg); | |
848 | struct pim_interface *pim_ifp = ifp->info; | |
849 | ||
850 | if (PIM_DEBUG_EVENTS) | |
851 | { | |
852 | char buff[100]; | |
853 | strcpy (buff, pim_str_sg_dump (&up->sg)); | |
854 | zlog_debug("%s %s: Prune(S,G)=%s from %s", | |
855 | __FILE__, __PRETTY_FUNCTION__, | |
856 | buff, pim_str_sg_dump (&child->sg)); | |
857 | } | |
858 | ||
859 | if (!pim_upstream_evaluate_join_desired (child)) | |
860 | pim_channel_del_oif (c_oil, ifp, PIM_OIF_FLAG_PROTO_PIM); | |
861 | ||
862 | /* | |
863 | * If the S,G has no if channel and the c_oil still | |
864 | * has output here then the *,G was supplying the implied | |
865 | * if channel. So remove it. | |
866 | */ | |
867 | if (!ch && c_oil->oil.mfcc_ttls[pim_ifp->mroute_vif_index]) | |
868 | pim_channel_del_oif (c_oil, ifp, PIM_OIF_FLAG_PROTO_PIM); | |
869 | } | |
870 | } | |
871 | } | |
12e41d03 DL |
872 | delete_on_noinfo(ch); |
873 | } | |
874 | ||
875 | void pim_ifchannel_update_could_assert(struct pim_ifchannel *ch) | |
876 | { | |
877 | int old_couldassert = PIM_FORCE_BOOLEAN(PIM_IF_FLAG_TEST_COULD_ASSERT(ch->flags)); | |
878 | int new_couldassert = PIM_FORCE_BOOLEAN(pim_macro_ch_could_assert_eval(ch)); | |
879 | ||
880 | if (new_couldassert == old_couldassert) | |
881 | return; | |
882 | ||
883 | if (PIM_DEBUG_PIM_EVENTS) { | |
884 | char src_str[100]; | |
885 | char grp_str[100]; | |
4ed0af70 DS |
886 | pim_inet4_dump("<src?>", ch->sg.src, src_str, sizeof(src_str)); |
887 | pim_inet4_dump("<grp?>", ch->sg.grp, grp_str, sizeof(grp_str)); | |
12e41d03 DL |
888 | zlog_debug("%s: CouldAssert(%s,%s,%s) changed from %d to %d", |
889 | __PRETTY_FUNCTION__, | |
890 | src_str, grp_str, ch->interface->name, | |
891 | old_couldassert, new_couldassert); | |
892 | } | |
893 | ||
894 | if (new_couldassert) { | |
895 | /* CouldAssert(S,G,I) switched from FALSE to TRUE */ | |
896 | PIM_IF_FLAG_SET_COULD_ASSERT(ch->flags); | |
897 | } | |
898 | else { | |
899 | /* CouldAssert(S,G,I) switched from TRUE to FALSE */ | |
900 | PIM_IF_FLAG_UNSET_COULD_ASSERT(ch->flags); | |
901 | ||
902 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_WINNER) { | |
903 | assert_action_a4(ch); | |
904 | } | |
905 | } | |
906 | ||
907 | pim_ifchannel_update_my_assert_metric(ch); | |
908 | } | |
909 | ||
910 | /* | |
911 | my_assert_metric may be affected by: | |
912 | ||
913 | CouldAssert(S,G) | |
914 | pim_ifp->primary_address | |
915 | rpf->source_nexthop.mrib_metric_preference; | |
916 | rpf->source_nexthop.mrib_route_metric; | |
917 | */ | |
918 | void pim_ifchannel_update_my_assert_metric(struct pim_ifchannel *ch) | |
919 | { | |
920 | struct pim_assert_metric my_metric_new = pim_macro_ch_my_assert_metric_eval(ch); | |
921 | ||
922 | if (pim_assert_metric_match(&my_metric_new, &ch->ifassert_my_metric)) | |
923 | return; | |
924 | ||
925 | if (PIM_DEBUG_PIM_EVENTS) { | |
926 | char src_str[100]; | |
927 | char grp_str[100]; | |
928 | char old_addr_str[100]; | |
929 | char new_addr_str[100]; | |
4ed0af70 DS |
930 | pim_inet4_dump("<src?>", ch->sg.src, src_str, sizeof(src_str)); |
931 | pim_inet4_dump("<grp?>", ch->sg.grp, grp_str, sizeof(grp_str)); | |
12e41d03 DL |
932 | pim_inet4_dump("<old_addr?>", ch->ifassert_my_metric.ip_address, old_addr_str, sizeof(old_addr_str)); |
933 | pim_inet4_dump("<new_addr?>", my_metric_new.ip_address, new_addr_str, sizeof(new_addr_str)); | |
934 | zlog_debug("%s: my_assert_metric(%s,%s,%s) changed from %u,%u,%u,%s to %u,%u,%u,%s", | |
935 | __PRETTY_FUNCTION__, | |
936 | src_str, grp_str, ch->interface->name, | |
937 | ch->ifassert_my_metric.rpt_bit_flag, | |
938 | ch->ifassert_my_metric.metric_preference, | |
939 | ch->ifassert_my_metric.route_metric, | |
940 | old_addr_str, | |
941 | my_metric_new.rpt_bit_flag, | |
942 | my_metric_new.metric_preference, | |
943 | my_metric_new.route_metric, | |
944 | new_addr_str); | |
945 | } | |
946 | ||
947 | ch->ifassert_my_metric = my_metric_new; | |
948 | ||
949 | if (pim_assert_metric_better(&ch->ifassert_my_metric, | |
950 | &ch->ifassert_winner_metric)) { | |
951 | assert_action_a5(ch); | |
952 | } | |
953 | } | |
954 | ||
955 | void pim_ifchannel_update_assert_tracking_desired(struct pim_ifchannel *ch) | |
956 | { | |
957 | int old_atd = PIM_FORCE_BOOLEAN(PIM_IF_FLAG_TEST_ASSERT_TRACKING_DESIRED(ch->flags)); | |
958 | int new_atd = PIM_FORCE_BOOLEAN(pim_macro_assert_tracking_desired_eval(ch)); | |
959 | ||
960 | if (new_atd == old_atd) | |
961 | return; | |
962 | ||
963 | if (PIM_DEBUG_PIM_EVENTS) { | |
964 | char src_str[100]; | |
965 | char grp_str[100]; | |
4ed0af70 DS |
966 | pim_inet4_dump("<src?>", ch->sg.src, src_str, sizeof(src_str)); |
967 | pim_inet4_dump("<grp?>", ch->sg.grp, grp_str, sizeof(grp_str)); | |
12e41d03 DL |
968 | zlog_debug("%s: AssertTrackingDesired(%s,%s,%s) changed from %d to %d", |
969 | __PRETTY_FUNCTION__, | |
970 | src_str, grp_str, ch->interface->name, | |
971 | old_atd, new_atd); | |
972 | } | |
973 | ||
974 | if (new_atd) { | |
975 | /* AssertTrackingDesired(S,G,I) switched from FALSE to TRUE */ | |
976 | PIM_IF_FLAG_SET_ASSERT_TRACKING_DESIRED(ch->flags); | |
977 | } | |
978 | else { | |
979 | /* AssertTrackingDesired(S,G,I) switched from TRUE to FALSE */ | |
980 | PIM_IF_FLAG_UNSET_ASSERT_TRACKING_DESIRED(ch->flags); | |
981 | ||
982 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { | |
983 | assert_action_a5(ch); | |
984 | } | |
985 | } | |
986 | } | |
c8507a16 DS |
987 | |
988 | /* | |
989 | * If we have a new pim interface, check to | |
990 | * see if any of the pre-existing channels have | |
991 | * their upstream out that way and turn on forwarding | |
992 | * for that ifchannel then. | |
993 | */ | |
994 | void | |
995 | pim_ifchannel_scan_forward_start (struct interface *new_ifp) | |
996 | { | |
997 | struct listnode *ifnode; | |
998 | struct interface *ifp; | |
999 | struct pim_interface *new_pim_ifp = new_ifp->info; | |
1000 | ||
1001 | for (ALL_LIST_ELEMENTS_RO (vrf_iflist (VRF_DEFAULT), ifnode, ifp)) | |
1002 | { | |
1003 | struct pim_interface *loop_pim_ifp = ifp->info; | |
1004 | struct listnode *ch_node; | |
1005 | struct pim_ifchannel *ch; | |
1006 | ||
1007 | if (!loop_pim_ifp) | |
1008 | continue; | |
1009 | ||
1010 | if (new_pim_ifp == loop_pim_ifp) | |
1011 | continue; | |
1012 | ||
1013 | for (ALL_LIST_ELEMENTS_RO (loop_pim_ifp->pim_ifchannel_list, ch_node, ch)) | |
1014 | { | |
1015 | if (ch->ifjoin_state == PIM_IFJOIN_JOIN) | |
1016 | { | |
1017 | struct pim_upstream *up = ch->upstream; | |
1018 | if ((!up->channel_oil) && | |
1019 | (up->rpf.source_nexthop.interface == new_ifp)) | |
1020 | pim_forward_start (ch); | |
1021 | } | |
1022 | } | |
1023 | } | |
1024 | } |