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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 "linklist.h" | |
23 | #include "thread.h" | |
24 | #include "memory.h" | |
744d91b3 | 25 | #include "if.h" |
c8507a16 | 26 | #include "vrf.h" |
a625e937 DS |
27 | #include "hash.h" |
28 | #include "jhash.h" | |
df94f9a9 | 29 | #include "prefix.h" |
12e41d03 DL |
30 | |
31 | #include "pimd.h" | |
32 | #include "pim_str.h" | |
33 | #include "pim_iface.h" | |
34 | #include "pim_ifchannel.h" | |
35 | #include "pim_zebra.h" | |
36 | #include "pim_time.h" | |
37 | #include "pim_msg.h" | |
38 | #include "pim_pim.h" | |
39 | #include "pim_join.h" | |
40 | #include "pim_rpf.h" | |
41 | #include "pim_macro.h" | |
dfbbce1d | 42 | #include "pim_oil.h" |
4a40c37a | 43 | #include "pim_upstream.h" |
15a5dafe | 44 | #include "pim_ssm.h" |
12e41d03 | 45 | |
d62a17ae | 46 | int pim_ifchannel_compare(struct pim_ifchannel *ch1, struct pim_ifchannel *ch2) |
3fdfd943 | 47 | { |
d62a17ae | 48 | struct pim_interface *pim_ifp1; |
49 | struct pim_interface *pim_ifp2; | |
3fdfd943 | 50 | |
d62a17ae | 51 | pim_ifp1 = ch1->interface->info; |
52 | pim_ifp2 = ch2->interface->info; | |
3fdfd943 | 53 | |
d62a17ae | 54 | if (pim_ifp1->mroute_vif_index < pim_ifp2->mroute_vif_index) |
55 | return -1; | |
3fdfd943 | 56 | |
d62a17ae | 57 | if (pim_ifp1->mroute_vif_index > pim_ifp2->mroute_vif_index) |
58 | return 1; | |
3fdfd943 | 59 | |
d62a17ae | 60 | if (ntohl(ch1->sg.grp.s_addr) < ntohl(ch2->sg.grp.s_addr)) |
61 | return -1; | |
3fdfd943 | 62 | |
d62a17ae | 63 | if (ntohl(ch1->sg.grp.s_addr) > ntohl(ch2->sg.grp.s_addr)) |
64 | return 1; | |
3fdfd943 | 65 | |
d62a17ae | 66 | if (ntohl(ch1->sg.src.s_addr) < ntohl(ch2->sg.src.s_addr)) |
67 | return -1; | |
3fdfd943 | 68 | |
d62a17ae | 69 | if (ntohl(ch1->sg.src.s_addr) > ntohl(ch2->sg.src.s_addr)) |
70 | return 1; | |
3fdfd943 | 71 | |
d62a17ae | 72 | return 0; |
3fdfd943 DS |
73 | } |
74 | ||
1a10fc74 DS |
75 | /* |
76 | * A (*,G) or a (*,*) is going away | |
77 | * remove the parent pointer from | |
78 | * those pointing at us | |
79 | */ | |
d62a17ae | 80 | static void pim_ifchannel_remove_children(struct pim_ifchannel *ch) |
1a10fc74 | 81 | { |
d62a17ae | 82 | struct pim_ifchannel *child; |
1a10fc74 | 83 | |
d62a17ae | 84 | if (!ch->sources) |
85 | return; | |
1a10fc74 | 86 | |
d62a17ae | 87 | while (!list_isempty(ch->sources)) { |
88 | child = listnode_head(ch->sources); | |
89 | child->parent = NULL; | |
90 | listnode_delete(ch->sources, child); | |
91 | } | |
1a10fc74 DS |
92 | } |
93 | ||
94 | /* | |
95 | * A (*,G) or a (*,*) is being created | |
96 | * find all the children that would point | |
97 | * at us. | |
98 | */ | |
d62a17ae | 99 | static void pim_ifchannel_find_new_children(struct pim_ifchannel *ch) |
1a10fc74 | 100 | { |
d62a17ae | 101 | struct pim_interface *pim_ifp = ch->interface->info; |
102 | struct pim_ifchannel *child; | |
103 | struct listnode *ch_node; | |
104 | ||
105 | // Basic Sanity that we are not being silly | |
106 | if ((ch->sg.src.s_addr != INADDR_ANY) | |
107 | && (ch->sg.grp.s_addr != INADDR_ANY)) | |
108 | return; | |
109 | ||
110 | if ((ch->sg.src.s_addr == INADDR_ANY) | |
111 | && (ch->sg.grp.s_addr == INADDR_ANY)) | |
112 | return; | |
113 | ||
114 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->pim_ifchannel_list, ch_node, | |
115 | child)) { | |
116 | if ((ch->sg.grp.s_addr != INADDR_ANY) | |
117 | && (child->sg.grp.s_addr == ch->sg.grp.s_addr) | |
118 | && (child != ch)) { | |
119 | child->parent = ch; | |
120 | listnode_add_sort(ch->sources, child); | |
121 | } | |
3fdfd943 | 122 | } |
1a10fc74 DS |
123 | } |
124 | ||
12e41d03 DL |
125 | void pim_ifchannel_free(struct pim_ifchannel *ch) |
126 | { | |
d62a17ae | 127 | XFREE(MTYPE_PIM_IFCHANNEL, ch); |
12e41d03 DL |
128 | } |
129 | ||
130 | void pim_ifchannel_delete(struct pim_ifchannel *ch) | |
131 | { | |
d62a17ae | 132 | struct pim_interface *pim_ifp; |
133 | ||
134 | pim_ifp = ch->interface->info; | |
135 | ||
136 | if (ch->upstream->channel_oil) { | |
137 | uint32_t mask = PIM_OIF_FLAG_PROTO_PIM; | |
138 | if (ch->upstream->flags & PIM_UPSTREAM_FLAG_MASK_SRC_IGMP) | |
139 | mask = PIM_OIF_FLAG_PROTO_IGMP; | |
140 | ||
141 | /* SGRpt entry could have empty oil */ | |
142 | if (ch->upstream->channel_oil) | |
143 | pim_channel_del_oif(ch->upstream->channel_oil, | |
144 | ch->interface, mask); | |
145 | /* | |
146 | * Do we have any S,G's that are inheriting? | |
147 | * Nuke from on high too. | |
148 | */ | |
149 | if (ch->upstream->sources) { | |
150 | struct pim_upstream *child; | |
151 | struct listnode *up_node; | |
152 | ||
153 | for (ALL_LIST_ELEMENTS_RO(ch->upstream->sources, | |
154 | up_node, child)) | |
155 | pim_channel_del_oif(child->channel_oil, | |
156 | ch->interface, | |
157 | PIM_OIF_FLAG_PROTO_STAR); | |
158 | } | |
159 | } | |
160 | ||
161 | /* | |
162 | * When this channel is removed | |
163 | * we need to find all our children | |
164 | * and make sure our pointers are fixed | |
165 | */ | |
166 | pim_ifchannel_remove_children(ch); | |
167 | ||
168 | if (ch->sources) | |
169 | list_delete(ch->sources); | |
170 | ||
171 | listnode_delete(ch->upstream->ifchannels, ch); | |
172 | ||
173 | if (ch->ifjoin_state != PIM_IFJOIN_NOINFO) { | |
9b29ea95 | 174 | pim_upstream_update_join_desired(pim_ifp->pim, ch->upstream); |
ef71d1f8 | 175 | } |
d62a17ae | 176 | |
177 | /* upstream is common across ifchannels, check if upstream's | |
178 | ifchannel list is empty before deleting upstream_del | |
179 | ref count will take care of it. | |
180 | */ | |
9b29ea95 | 181 | pim_upstream_del(pim_ifp->pim, ch->upstream, __PRETTY_FUNCTION__); |
d62a17ae | 182 | ch->upstream = NULL; |
183 | ||
184 | THREAD_OFF(ch->t_ifjoin_expiry_timer); | |
185 | THREAD_OFF(ch->t_ifjoin_prune_pending_timer); | |
186 | THREAD_OFF(ch->t_ifassert_timer); | |
187 | ||
188 | if (ch->parent) { | |
189 | listnode_delete(ch->parent->sources, ch); | |
190 | ch->parent = NULL; | |
191 | } | |
192 | /* | |
193 | notice that listnode_delete() can't be moved | |
194 | into pim_ifchannel_free() because the later is | |
195 | called by list_delete_all_node() | |
196 | */ | |
197 | listnode_delete(pim_ifp->pim_ifchannel_list, ch); | |
198 | hash_release(pim_ifp->pim_ifchannel_hash, ch); | |
f88df3a6 | 199 | listnode_delete(pim_ifp->pim->ifchannel_list, ch); |
d62a17ae | 200 | |
201 | if (PIM_DEBUG_PIM_TRACE) | |
202 | zlog_debug("%s: ifchannel entry %s is deleted ", | |
203 | __PRETTY_FUNCTION__, ch->sg_str); | |
204 | ||
205 | pim_ifchannel_free(ch); | |
12e41d03 | 206 | } |
cb24fec4 | 207 | |
d62a17ae | 208 | void pim_ifchannel_delete_all(struct interface *ifp) |
cb24fec4 | 209 | { |
d62a17ae | 210 | struct pim_interface *pim_ifp; |
211 | struct listnode *ifchannel_node; | |
212 | struct listnode *ifchannel_nextnode; | |
213 | struct pim_ifchannel *ifchannel; | |
214 | ||
215 | pim_ifp = ifp->info; | |
216 | if (!pim_ifp) | |
217 | return; | |
218 | ||
219 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, ifchannel_node, | |
220 | ifchannel_nextnode, ifchannel)) { | |
221 | pim_ifchannel_delete(ifchannel); | |
222 | } | |
cb24fec4 | 223 | } |
d62a17ae | 224 | |
12e41d03 DL |
225 | static void delete_on_noinfo(struct pim_ifchannel *ch) |
226 | { | |
d62a17ae | 227 | if (ch->local_ifmembership == PIM_IFMEMBERSHIP_NOINFO |
228 | && ch->ifjoin_state == PIM_IFJOIN_NOINFO | |
229 | && ch->t_ifjoin_expiry_timer == NULL) | |
230 | pim_ifchannel_delete(ch); | |
12e41d03 DL |
231 | } |
232 | ||
d62a17ae | 233 | void pim_ifchannel_ifjoin_switch(const char *caller, struct pim_ifchannel *ch, |
12e41d03 DL |
234 | enum pim_ifjoin_state new_state) |
235 | { | |
d62a17ae | 236 | enum pim_ifjoin_state old_state = ch->ifjoin_state; |
9b29ea95 | 237 | struct pim_interface *pim_ifp = ch->interface->info; |
d62a17ae | 238 | |
239 | if (PIM_DEBUG_PIM_EVENTS) | |
240 | zlog_debug( | |
241 | "PIM_IFCHANNEL(%s): %s is switching from %s to %s", | |
242 | ch->interface->name, ch->sg_str, | |
243 | pim_ifchannel_ifjoin_name(ch->ifjoin_state, ch->flags), | |
244 | pim_ifchannel_ifjoin_name(new_state, 0)); | |
245 | ||
246 | ||
247 | if (old_state == new_state) { | |
248 | if (PIM_DEBUG_PIM_EVENTS) { | |
249 | zlog_debug( | |
250 | "%s calledby %s: non-transition on state %d (%s)", | |
251 | __PRETTY_FUNCTION__, caller, new_state, | |
252 | pim_ifchannel_ifjoin_name(new_state, 0)); | |
6578dfa3 | 253 | } |
d62a17ae | 254 | return; |
255 | } | |
256 | ||
257 | ch->ifjoin_state = new_state; | |
258 | ||
259 | if (ch->sg.src.s_addr == INADDR_ANY) { | |
260 | struct pim_upstream *up = ch->upstream; | |
261 | struct pim_upstream *child; | |
262 | struct listnode *up_node; | |
263 | ||
264 | if (up) { | |
265 | if (ch->ifjoin_state == PIM_IFJOIN_NOINFO) { | |
266 | for (ALL_LIST_ELEMENTS_RO(up->sources, up_node, | |
267 | child)) { | |
268 | struct channel_oil *c_oil = | |
269 | child->channel_oil; | |
d62a17ae | 270 | |
271 | if (PIM_DEBUG_PIM_TRACE) | |
272 | zlog_debug( | |
273 | "%s %s: Prune(S,G)=%s from %s", | |
274 | __FILE__, | |
275 | __PRETTY_FUNCTION__, | |
276 | child->sg_str, | |
277 | up->sg_str); | |
278 | if (!c_oil) | |
279 | continue; | |
280 | ||
281 | if (!pim_upstream_evaluate_join_desired( | |
9b29ea95 | 282 | pim_ifp->pim, child)) { |
d62a17ae | 283 | pim_channel_del_oif( |
284 | c_oil, ch->interface, | |
285 | PIM_OIF_FLAG_PROTO_STAR); | |
286 | pim_upstream_update_join_desired( | |
9b29ea95 | 287 | pim_ifp->pim, child); |
d62a17ae | 288 | } |
289 | ||
290 | /* | |
291 | * If the S,G has no if channel and the | |
292 | * c_oil still | |
293 | * has output here then the *,G was | |
294 | * supplying the implied | |
295 | * if channel. So remove it. | |
296 | * I think this is dead code now. is it? | |
297 | */ | |
a88e628d DS |
298 | if (c_oil->oil.mfcc_ttls |
299 | [pim_ifp->mroute_vif_index]) | |
d62a17ae | 300 | pim_channel_del_oif( |
301 | c_oil, ch->interface, | |
302 | PIM_OIF_FLAG_PROTO_STAR); | |
303 | } | |
304 | } | |
305 | if (ch->ifjoin_state == PIM_IFJOIN_JOIN) { | |
306 | for (ALL_LIST_ELEMENTS_RO(up->sources, up_node, | |
307 | child)) { | |
308 | if (PIM_DEBUG_PIM_TRACE) | |
309 | zlog_debug( | |
310 | "%s %s: Join(S,G)=%s from %s", | |
311 | __FILE__, | |
312 | __PRETTY_FUNCTION__, | |
313 | child->sg_str, | |
314 | up->sg_str); | |
315 | ||
316 | if (pim_upstream_evaluate_join_desired( | |
9b29ea95 | 317 | pim_ifp->pim, child)) { |
d62a17ae | 318 | pim_channel_add_oif( |
319 | child->channel_oil, | |
320 | ch->interface, | |
321 | PIM_OIF_FLAG_PROTO_STAR); | |
322 | pim_upstream_update_join_desired( | |
9b29ea95 | 323 | pim_ifp->pim, child); |
d62a17ae | 324 | } |
325 | } | |
326 | } | |
6578dfa3 | 327 | } |
6578dfa3 | 328 | } |
d62a17ae | 329 | /* Transition to/from NOINFO ? */ |
330 | if ((old_state == PIM_IFJOIN_NOINFO) | |
331 | || (new_state == PIM_IFJOIN_NOINFO)) { | |
332 | ||
333 | if (PIM_DEBUG_PIM_EVENTS) { | |
334 | zlog_debug("PIM_IFCHANNEL_%s: (S,G)=%s on interface %s", | |
335 | ((new_state == PIM_IFJOIN_NOINFO) ? "DOWN" | |
336 | : "UP"), | |
337 | ch->sg_str, ch->interface->name); | |
338 | } | |
339 | ||
340 | /* | |
341 | Record uptime of state transition to/from NOINFO | |
342 | */ | |
343 | ch->ifjoin_creation = pim_time_monotonic_sec(); | |
344 | ||
9b29ea95 | 345 | pim_upstream_update_join_desired(pim_ifp->pim, ch->upstream); |
d62a17ae | 346 | pim_ifchannel_update_could_assert(ch); |
347 | pim_ifchannel_update_assert_tracking_desired(ch); | |
348 | } | |
12e41d03 DL |
349 | } |
350 | ||
d1e77284 | 351 | const char *pim_ifchannel_ifjoin_name(enum pim_ifjoin_state ifjoin_state, |
d62a17ae | 352 | int flags) |
12e41d03 | 353 | { |
d62a17ae | 354 | switch (ifjoin_state) { |
355 | case PIM_IFJOIN_NOINFO: | |
356 | if (PIM_IF_FLAG_TEST_S_G_RPT(flags)) | |
357 | return "SGRpt"; | |
358 | else | |
359 | return "NOINFO"; | |
360 | break; | |
361 | case PIM_IFJOIN_JOIN: | |
362 | return "JOIN"; | |
363 | break; | |
364 | case PIM_IFJOIN_PRUNE: | |
365 | return "PRUNE"; | |
366 | break; | |
367 | case PIM_IFJOIN_PRUNE_PENDING: | |
368 | return "PRUNEP"; | |
369 | break; | |
370 | case PIM_IFJOIN_PRUNE_TMP: | |
371 | return "PRUNET"; | |
372 | break; | |
373 | case PIM_IFJOIN_PRUNE_PENDING_TMP: | |
374 | return "PRUNEPT"; | |
375 | break; | |
376 | } | |
377 | ||
378 | return "ifjoin_bad_state"; | |
12e41d03 DL |
379 | } |
380 | ||
381 | const char *pim_ifchannel_ifassert_name(enum pim_ifassert_state ifassert_state) | |
382 | { | |
d62a17ae | 383 | switch (ifassert_state) { |
384 | case PIM_IFASSERT_NOINFO: | |
385 | return "NOINFO"; | |
386 | case PIM_IFASSERT_I_AM_WINNER: | |
387 | return "WINNER"; | |
388 | case PIM_IFASSERT_I_AM_LOSER: | |
389 | return "LOSER"; | |
390 | } | |
12e41d03 | 391 | |
d62a17ae | 392 | return "ifassert_bad_state"; |
12e41d03 DL |
393 | } |
394 | ||
395 | /* | |
396 | RFC 4601: 4.6.5. Assert State Macros | |
397 | ||
398 | AssertWinner(S,G,I) defaults to NULL and AssertWinnerMetric(S,G,I) | |
399 | defaults to Infinity when in the NoInfo state. | |
400 | */ | |
401 | void reset_ifassert_state(struct pim_ifchannel *ch) | |
402 | { | |
d62a17ae | 403 | struct in_addr any = {.s_addr = INADDR_ANY}; |
7656e7fc | 404 | |
d62a17ae | 405 | THREAD_OFF(ch->t_ifassert_timer); |
12e41d03 | 406 | |
d62a17ae | 407 | pim_ifassert_winner_set(ch, PIM_IFASSERT_NOINFO, any, |
408 | qpim_infinite_assert_metric); | |
12e41d03 DL |
409 | } |
410 | ||
12e41d03 | 411 | struct pim_ifchannel *pim_ifchannel_find(struct interface *ifp, |
4ed0af70 | 412 | struct prefix_sg *sg) |
12e41d03 | 413 | { |
d62a17ae | 414 | struct pim_interface *pim_ifp; |
415 | struct pim_ifchannel *ch; | |
416 | struct pim_ifchannel lookup; | |
12e41d03 | 417 | |
d62a17ae | 418 | pim_ifp = ifp->info; |
12e41d03 | 419 | |
d62a17ae | 420 | if (!pim_ifp) { |
421 | zlog_warn("%s: (S,G)=%s: multicast not enabled on interface %s", | |
422 | __PRETTY_FUNCTION__, pim_str_sg_dump(sg), ifp->name); | |
423 | return NULL; | |
424 | } | |
12e41d03 | 425 | |
d62a17ae | 426 | lookup.sg = *sg; |
427 | ch = hash_lookup(pim_ifp->pim_ifchannel_hash, &lookup); | |
12e41d03 | 428 | |
d62a17ae | 429 | return ch; |
12e41d03 DL |
430 | } |
431 | ||
432 | static void ifmembership_set(struct pim_ifchannel *ch, | |
433 | enum pim_ifmembership membership) | |
434 | { | |
9b29ea95 DS |
435 | struct pim_interface *pim_ifp = ch->interface->info; |
436 | ||
d62a17ae | 437 | if (ch->local_ifmembership == membership) |
438 | return; | |
439 | ||
440 | if (PIM_DEBUG_PIM_EVENTS) { | |
441 | zlog_debug("%s: (S,G)=%s membership now is %s on interface %s", | |
442 | __PRETTY_FUNCTION__, ch->sg_str, | |
443 | membership == PIM_IFMEMBERSHIP_INCLUDE ? "INCLUDE" | |
444 | : "NOINFO", | |
445 | ch->interface->name); | |
446 | } | |
447 | ||
448 | ch->local_ifmembership = membership; | |
449 | ||
9b29ea95 | 450 | pim_upstream_update_join_desired(pim_ifp->pim, ch->upstream); |
d62a17ae | 451 | pim_ifchannel_update_could_assert(ch); |
452 | pim_ifchannel_update_assert_tracking_desired(ch); | |
12e41d03 DL |
453 | } |
454 | ||
455 | ||
456 | void pim_ifchannel_membership_clear(struct interface *ifp) | |
457 | { | |
d62a17ae | 458 | struct pim_interface *pim_ifp; |
459 | struct listnode *ch_node; | |
460 | struct pim_ifchannel *ch; | |
12e41d03 | 461 | |
d62a17ae | 462 | pim_ifp = ifp->info; |
463 | zassert(pim_ifp); | |
12e41d03 | 464 | |
d62a17ae | 465 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->pim_ifchannel_list, ch_node, ch)) { |
466 | ifmembership_set(ch, PIM_IFMEMBERSHIP_NOINFO); | |
467 | } | |
12e41d03 DL |
468 | } |
469 | ||
470 | void pim_ifchannel_delete_on_noinfo(struct interface *ifp) | |
471 | { | |
d62a17ae | 472 | struct pim_interface *pim_ifp; |
473 | struct listnode *node; | |
474 | struct listnode *next_node; | |
475 | struct pim_ifchannel *ch; | |
12e41d03 | 476 | |
d62a17ae | 477 | pim_ifp = ifp->info; |
478 | zassert(pim_ifp); | |
12e41d03 | 479 | |
d62a17ae | 480 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, node, next_node, |
481 | ch)) { | |
482 | delete_on_noinfo(ch); | |
483 | } | |
12e41d03 DL |
484 | } |
485 | ||
1a10fc74 DS |
486 | /* |
487 | * For a given Interface, if we are given a S,G | |
488 | * Find the *,G (If we have it). | |
489 | * If we are passed a *,G, find the *,* ifchannel | |
490 | * if we have it. | |
491 | */ | |
d62a17ae | 492 | static struct pim_ifchannel *pim_ifchannel_find_parent(struct pim_ifchannel *ch) |
1a10fc74 | 493 | { |
d62a17ae | 494 | struct prefix_sg parent_sg = ch->sg; |
495 | struct pim_ifchannel *parent = NULL; | |
496 | ||
497 | // (S,G) | |
498 | if ((parent_sg.src.s_addr != INADDR_ANY) | |
499 | && (parent_sg.grp.s_addr != INADDR_ANY)) { | |
500 | parent_sg.src.s_addr = INADDR_ANY; | |
501 | parent = pim_ifchannel_find(ch->interface, &parent_sg); | |
502 | ||
503 | if (parent) | |
504 | listnode_add(parent->sources, ch); | |
505 | return parent; | |
506 | } | |
507 | ||
508 | return NULL; | |
1a10fc74 DS |
509 | } |
510 | ||
d62a17ae | 511 | struct pim_ifchannel *pim_ifchannel_add(struct interface *ifp, |
512 | struct prefix_sg *sg, int flags) | |
12e41d03 | 513 | { |
d62a17ae | 514 | struct pim_interface *pim_ifp; |
515 | struct pim_ifchannel *ch; | |
516 | struct pim_upstream *up; | |
517 | ||
518 | ch = pim_ifchannel_find(ifp, sg); | |
519 | if (ch) | |
520 | return ch; | |
521 | ||
522 | pim_ifp = ifp->info; | |
523 | ||
2002dcdb DS |
524 | up = pim_upstream_add(pim_ifp->pim, sg, NULL, flags, |
525 | __PRETTY_FUNCTION__); | |
d62a17ae | 526 | if (!up) { |
527 | zlog_err( | |
528 | "%s: could not attach upstream (S,G)=%s on interface %s", | |
529 | __PRETTY_FUNCTION__, pim_str_sg_dump(sg), ifp->name); | |
530 | return NULL; | |
531 | } | |
532 | ||
533 | ch = XCALLOC(MTYPE_PIM_IFCHANNEL, sizeof(*ch)); | |
534 | if (!ch) { | |
535 | zlog_warn( | |
536 | "%s: pim_ifchannel_new() failure for (S,G)=%s on interface %s", | |
537 | __PRETTY_FUNCTION__, up->sg_str, ifp->name); | |
538 | ||
9b29ea95 | 539 | pim_upstream_del(pim_ifp->pim, up, __PRETTY_FUNCTION__); |
d62a17ae | 540 | return NULL; |
541 | } | |
542 | ||
543 | ch->flags = 0; | |
544 | ch->upstream = up; | |
545 | ch->interface = ifp; | |
546 | ch->sg = *sg; | |
547 | pim_str_sg_set(sg, ch->sg_str); | |
548 | ch->parent = pim_ifchannel_find_parent(ch); | |
549 | if (ch->sg.src.s_addr == INADDR_ANY) { | |
550 | ch->sources = list_new(); | |
551 | ch->sources->cmp = | |
552 | (int (*)(void *, void *))pim_ifchannel_compare; | |
553 | } else | |
554 | ch->sources = NULL; | |
555 | ||
556 | pim_ifchannel_find_new_children(ch); | |
557 | ch->local_ifmembership = PIM_IFMEMBERSHIP_NOINFO; | |
558 | ||
559 | ch->ifjoin_state = PIM_IFJOIN_NOINFO; | |
560 | ch->t_ifjoin_expiry_timer = NULL; | |
561 | ch->t_ifjoin_prune_pending_timer = NULL; | |
562 | ch->ifjoin_creation = 0; | |
563 | ||
564 | ch->ifassert_my_metric = pim_macro_ch_my_assert_metric_eval(ch); | |
565 | ch->ifassert_winner_metric = pim_macro_ch_my_assert_metric_eval(ch); | |
566 | ||
567 | ch->ifassert_winner.s_addr = 0; | |
568 | ||
569 | /* Assert state */ | |
570 | ch->t_ifassert_timer = NULL; | |
571 | ch->ifassert_state = PIM_IFASSERT_NOINFO; | |
572 | reset_ifassert_state(ch); | |
573 | if (pim_macro_ch_could_assert_eval(ch)) | |
574 | PIM_IF_FLAG_SET_COULD_ASSERT(ch->flags); | |
575 | else | |
576 | PIM_IF_FLAG_UNSET_COULD_ASSERT(ch->flags); | |
577 | ||
578 | if (pim_macro_assert_tracking_desired_eval(ch)) | |
579 | PIM_IF_FLAG_SET_ASSERT_TRACKING_DESIRED(ch->flags); | |
580 | else | |
581 | PIM_IF_FLAG_UNSET_ASSERT_TRACKING_DESIRED(ch->flags); | |
582 | ||
583 | /* Attach to list */ | |
584 | listnode_add_sort(pim_ifp->pim_ifchannel_list, ch); | |
585 | ch = hash_get(pim_ifp->pim_ifchannel_hash, ch, hash_alloc_intern); | |
f88df3a6 | 586 | listnode_add_sort(pim_ifp->pim->ifchannel_list, ch); |
d62a17ae | 587 | |
588 | listnode_add_sort(up->ifchannels, ch); | |
589 | ||
590 | if (PIM_DEBUG_PIM_TRACE) | |
591 | zlog_debug("%s: ifchannel %s is created ", __PRETTY_FUNCTION__, | |
592 | ch->sg_str); | |
593 | ||
594 | return ch; | |
12e41d03 DL |
595 | } |
596 | ||
95d3f501 | 597 | static void ifjoin_to_noinfo(struct pim_ifchannel *ch, bool ch_del) |
12e41d03 | 598 | { |
d62a17ae | 599 | pim_forward_stop(ch); |
600 | pim_ifchannel_ifjoin_switch(__PRETTY_FUNCTION__, ch, PIM_IFJOIN_NOINFO); | |
601 | if (ch_del) | |
602 | delete_on_noinfo(ch); | |
12e41d03 DL |
603 | } |
604 | ||
605 | static int on_ifjoin_expiry_timer(struct thread *t) | |
606 | { | |
d62a17ae | 607 | struct pim_ifchannel *ch; |
12e41d03 | 608 | |
d62a17ae | 609 | ch = THREAD_ARG(t); |
12e41d03 | 610 | |
d62a17ae | 611 | ifjoin_to_noinfo(ch, true); |
612 | /* ch may have been deleted */ | |
12e41d03 | 613 | |
d62a17ae | 614 | return 0; |
12e41d03 DL |
615 | } |
616 | ||
12e41d03 DL |
617 | static int on_ifjoin_prune_pending_timer(struct thread *t) |
618 | { | |
d62a17ae | 619 | struct pim_ifchannel *ch; |
620 | int send_prune_echo; /* boolean */ | |
621 | struct interface *ifp; | |
622 | struct pim_interface *pim_ifp; | |
623 | ||
624 | ch = THREAD_ARG(t); | |
625 | ||
626 | if (ch->ifjoin_state == PIM_IFJOIN_PRUNE_PENDING) { | |
627 | /* Send PruneEcho(S,G) ? */ | |
628 | ifp = ch->interface; | |
629 | pim_ifp = ifp->info; | |
630 | send_prune_echo = (listcount(pim_ifp->pim_neighbor_list) > 1); | |
631 | ||
632 | if (send_prune_echo) { | |
633 | struct pim_rpf rpf; | |
634 | ||
635 | rpf.source_nexthop.interface = ifp; | |
636 | rpf.rpf_addr.u.prefix4 = pim_ifp->primary_address; | |
637 | pim_jp_agg_single_upstream_send(&rpf, ch->upstream, 0); | |
638 | } | |
639 | /* If SGRpt flag is set on ifchannel, Trigger SGRpt | |
640 | message on RP path upon prune timer expiry. | |
641 | */ | |
642 | if (PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) { | |
643 | if (ch->upstream) | |
9b29ea95 DS |
644 | pim_upstream_update_join_desired(pim_ifp->pim, |
645 | ch->upstream); | |
d62a17ae | 646 | /* |
647 | ch->ifjoin_state transition to NOINFO state | |
648 | ch_del is set to 0 for not deleteing from here. | |
649 | Holdtime expiry (ch_del set to 1) delete the entry. | |
650 | */ | |
651 | ifjoin_to_noinfo(ch, false); | |
652 | } else | |
653 | ifjoin_to_noinfo(ch, true); | |
654 | /* from here ch may have been deleted */ | |
655 | } else { | |
656 | zlog_warn( | |
657 | "%s: IFCHANNEL%s Prune Pending Timer Popped while in %s state", | |
658 | __PRETTY_FUNCTION__, pim_str_sg_dump(&ch->sg), | |
659 | pim_ifchannel_ifjoin_name(ch->ifjoin_state, ch->flags)); | |
660 | } | |
661 | ||
662 | return 0; | |
12e41d03 DL |
663 | } |
664 | ||
d62a17ae | 665 | static void check_recv_upstream(int is_join, struct interface *recv_ifp, |
666 | struct in_addr upstream, struct prefix_sg *sg, | |
667 | uint8_t source_flags, int holdtime) | |
12e41d03 | 668 | { |
d62a17ae | 669 | struct pim_upstream *up; |
9b29ea95 | 670 | struct pim_interface *pim_ifp = recv_ifp->info; |
d62a17ae | 671 | |
672 | /* Upstream (S,G) in Joined state ? */ | |
9b29ea95 | 673 | up = pim_upstream_find(pim_ifp->pim, sg); |
d62a17ae | 674 | if (!up) |
675 | return; | |
676 | if (up->join_state != PIM_UPSTREAM_JOINED) | |
677 | return; | |
678 | ||
679 | /* Upstream (S,G) in Joined state */ | |
680 | ||
681 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { | |
682 | /* RPF'(S,G) not found */ | |
683 | zlog_warn("%s %s: RPF'%s not found", __FILE__, | |
684 | __PRETTY_FUNCTION__, up->sg_str); | |
685 | return; | |
686 | } | |
687 | ||
688 | /* upstream directed to RPF'(S,G) ? */ | |
689 | if (upstream.s_addr != up->rpf.rpf_addr.u.prefix4.s_addr) { | |
690 | char up_str[INET_ADDRSTRLEN]; | |
691 | char rpf_str[PREFIX_STRLEN]; | |
692 | pim_inet4_dump("<up?>", upstream, up_str, sizeof(up_str)); | |
693 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_str, | |
694 | sizeof(rpf_str)); | |
695 | zlog_warn( | |
696 | "%s %s: (S,G)=%s upstream=%s not directed to RPF'(S,G)=%s on interface %s", | |
697 | __FILE__, __PRETTY_FUNCTION__, up->sg_str, up_str, | |
698 | rpf_str, recv_ifp->name); | |
699 | return; | |
700 | } | |
701 | /* upstream directed to RPF'(S,G) */ | |
702 | ||
703 | if (is_join) { | |
704 | /* Join(S,G) to RPF'(S,G) */ | |
705 | pim_upstream_join_suppress(up, up->rpf.rpf_addr.u.prefix4, | |
706 | holdtime); | |
707 | return; | |
708 | } | |
709 | ||
710 | /* Prune to RPF'(S,G) */ | |
711 | ||
712 | if (source_flags & PIM_RPT_BIT_MASK) { | |
713 | if (source_flags & PIM_WILDCARD_BIT_MASK) { | |
714 | /* Prune(*,G) to RPF'(S,G) */ | |
715 | pim_upstream_join_timer_decrease_to_t_override( | |
716 | "Prune(*,G)", up); | |
717 | return; | |
718 | } | |
719 | ||
720 | /* Prune(S,G,rpt) to RPF'(S,G) */ | |
721 | pim_upstream_join_timer_decrease_to_t_override("Prune(S,G,rpt)", | |
722 | up); | |
723 | return; | |
724 | } | |
725 | ||
726 | /* Prune(S,G) to RPF'(S,G) */ | |
727 | pim_upstream_join_timer_decrease_to_t_override("Prune(S,G)", up); | |
12e41d03 DL |
728 | } |
729 | ||
d62a17ae | 730 | static int nonlocal_upstream(int is_join, struct interface *recv_ifp, |
731 | struct in_addr upstream, struct prefix_sg *sg, | |
732 | uint8_t source_flags, uint16_t holdtime) | |
12e41d03 | 733 | { |
d62a17ae | 734 | struct pim_interface *recv_pim_ifp; |
735 | int is_local; /* boolean */ | |
736 | ||
737 | recv_pim_ifp = recv_ifp->info; | |
738 | zassert(recv_pim_ifp); | |
739 | ||
740 | is_local = (upstream.s_addr == recv_pim_ifp->primary_address.s_addr); | |
741 | ||
742 | if (is_local) | |
743 | return 0; | |
744 | ||
745 | if (PIM_DEBUG_PIM_TRACE_DETAIL) { | |
746 | char up_str[INET_ADDRSTRLEN]; | |
747 | pim_inet4_dump("<upstream?>", upstream, up_str, sizeof(up_str)); | |
748 | zlog_warn("%s: recv %s (S,G)=%s to non-local upstream=%s on %s", | |
749 | __PRETTY_FUNCTION__, is_join ? "join" : "prune", | |
750 | pim_str_sg_dump(sg), up_str, recv_ifp->name); | |
751 | } | |
752 | ||
753 | /* | |
754 | * Since recv upstream addr was not directed to our primary | |
755 | * address, check if we should react to it in any way. | |
756 | */ | |
757 | check_recv_upstream(is_join, recv_ifp, upstream, sg, source_flags, | |
758 | holdtime); | |
759 | ||
760 | return 1; /* non-local */ | |
12e41d03 DL |
761 | } |
762 | ||
d62a17ae | 763 | void pim_ifchannel_join_add(struct interface *ifp, struct in_addr neigh_addr, |
764 | struct in_addr upstream, struct prefix_sg *sg, | |
765 | uint8_t source_flags, uint16_t holdtime) | |
12e41d03 | 766 | { |
d62a17ae | 767 | struct pim_interface *pim_ifp; |
768 | struct pim_ifchannel *ch; | |
769 | ||
770 | if (nonlocal_upstream(1 /* join */, ifp, upstream, sg, source_flags, | |
771 | holdtime)) { | |
772 | return; | |
773 | } | |
774 | ||
775 | ch = pim_ifchannel_add(ifp, sg, PIM_UPSTREAM_FLAG_MASK_SRC_PIM); | |
776 | if (!ch) | |
777 | return; | |
778 | ||
12e41d03 | 779 | /* |
d62a17ae | 780 | RFC 4601: 4.6.1. (S,G) Assert Message State Machine |
781 | ||
782 | Transitions from "I am Assert Loser" State | |
12e41d03 | 783 | |
d62a17ae | 784 | Receive Join(S,G) on Interface I |
12e41d03 | 785 | |
d62a17ae | 786 | We receive a Join(S,G) that has the Upstream Neighbor Address |
787 | field set to my primary IP address on interface I. The action is | |
788 | to transition to NoInfo state, delete this (S,G) assert state | |
789 | (Actions A5 below), and allow the normal PIM Join/Prune mechanisms | |
790 | to operate. | |
12e41d03 | 791 | |
d62a17ae | 792 | Notice: The nonlocal_upstream() test above ensures the upstream |
793 | address of the join message is our primary address. | |
12e41d03 | 794 | */ |
d62a17ae | 795 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { |
796 | char neigh_str[INET_ADDRSTRLEN]; | |
797 | pim_inet4_dump("<neigh?>", neigh_addr, neigh_str, | |
798 | sizeof(neigh_str)); | |
799 | zlog_warn("%s: Assert Loser recv Join%s from %s on %s", | |
800 | __PRETTY_FUNCTION__, ch->sg_str, neigh_str, | |
801 | ifp->name); | |
802 | ||
803 | assert_action_a5(ch); | |
804 | } | |
805 | ||
806 | pim_ifp = ifp->info; | |
807 | zassert(pim_ifp); | |
808 | ||
809 | switch (ch->ifjoin_state) { | |
810 | case PIM_IFJOIN_NOINFO: | |
811 | pim_ifchannel_ifjoin_switch(__PRETTY_FUNCTION__, ch, | |
812 | PIM_IFJOIN_JOIN); | |
813 | if (pim_macro_chisin_oiflist(ch)) { | |
9b29ea95 DS |
814 | pim_upstream_inherited_olist(pim_ifp->pim, |
815 | ch->upstream); | |
d62a17ae | 816 | pim_forward_start(ch); |
817 | } | |
818 | /* | |
819 | * If we are going to be a LHR, we need to note it | |
820 | */ | |
9d303b37 DL |
821 | if (ch->upstream->parent && (ch->upstream->parent->flags |
822 | & PIM_UPSTREAM_FLAG_MASK_SRC_IGMP) | |
d62a17ae | 823 | && !(ch->upstream->flags |
824 | & PIM_UPSTREAM_FLAG_MASK_SRC_LHR)) { | |
825 | pim_upstream_ref(ch->upstream, | |
826 | PIM_UPSTREAM_FLAG_MASK_SRC_LHR, | |
827 | __PRETTY_FUNCTION__); | |
828 | pim_upstream_keep_alive_timer_start( | |
829 | ch->upstream, qpim_keep_alive_time); | |
830 | } | |
831 | break; | |
832 | case PIM_IFJOIN_JOIN: | |
833 | zassert(!ch->t_ifjoin_prune_pending_timer); | |
834 | ||
835 | /* | |
836 | In the JOIN state ch->t_ifjoin_expiry_timer may be NULL due to | |
837 | a | |
838 | previously received join message with holdtime=0xFFFF. | |
839 | */ | |
840 | if (ch->t_ifjoin_expiry_timer) { | |
841 | unsigned long remain = thread_timer_remain_second( | |
842 | ch->t_ifjoin_expiry_timer); | |
843 | if (remain > holdtime) { | |
844 | /* | |
845 | RFC 4601: 4.5.3. Receiving (S,G) Join/Prune | |
846 | Messages | |
847 | ||
848 | Transitions from Join State | |
849 | ||
850 | The (S,G) downstream state machine on | |
851 | interface I remains in | |
852 | Join state, and the Expiry Timer (ET) is | |
853 | restarted, set to | |
854 | maximum of its current value and the HoldTime | |
855 | from the | |
856 | triggering Join/Prune message. | |
857 | ||
858 | Conclusion: Do not change the ET if the | |
859 | current value is | |
860 | higher than the received join holdtime. | |
861 | */ | |
862 | return; | |
863 | } | |
864 | } | |
865 | THREAD_OFF(ch->t_ifjoin_expiry_timer); | |
866 | break; | |
867 | case PIM_IFJOIN_PRUNE: | |
868 | if (source_flags & PIM_ENCODE_RPT_BIT) | |
869 | pim_ifchannel_ifjoin_switch(__PRETTY_FUNCTION__, ch, | |
870 | PIM_IFJOIN_NOINFO); | |
871 | break; | |
872 | case PIM_IFJOIN_PRUNE_PENDING: | |
873 | THREAD_OFF(ch->t_ifjoin_prune_pending_timer); | |
874 | if (source_flags & PIM_ENCODE_RPT_BIT) { | |
875 | THREAD_OFF(ch->t_ifjoin_expiry_timer); | |
876 | pim_ifchannel_ifjoin_switch(__PRETTY_FUNCTION__, ch, | |
877 | PIM_IFJOIN_NOINFO); | |
878 | } else | |
879 | pim_ifchannel_ifjoin_switch(__PRETTY_FUNCTION__, ch, | |
880 | PIM_IFJOIN_JOIN); | |
881 | break; | |
882 | case PIM_IFJOIN_PRUNE_TMP: | |
883 | break; | |
884 | case PIM_IFJOIN_PRUNE_PENDING_TMP: | |
885 | break; | |
886 | } | |
887 | ||
888 | if (holdtime != 0xFFFF) { | |
889 | thread_add_timer(master, on_ifjoin_expiry_timer, ch, holdtime, | |
890 | &ch->t_ifjoin_expiry_timer); | |
891 | } | |
12e41d03 DL |
892 | } |
893 | ||
d62a17ae | 894 | void pim_ifchannel_prune(struct interface *ifp, struct in_addr upstream, |
895 | struct prefix_sg *sg, uint8_t source_flags, | |
12e41d03 DL |
896 | uint16_t holdtime) |
897 | { | |
d62a17ae | 898 | struct pim_ifchannel *ch; |
899 | struct pim_interface *pim_ifp; | |
900 | int jp_override_interval_msec; | |
1405c852 | 901 | |
d62a17ae | 902 | if (nonlocal_upstream(0 /* prune */, ifp, upstream, sg, source_flags, |
903 | holdtime)) { | |
904 | return; | |
905 | } | |
906 | ||
907 | ch = pim_ifchannel_find(ifp, sg); | |
908 | if (!ch && !(source_flags & PIM_ENCODE_RPT_BIT)) { | |
909 | if (PIM_DEBUG_TRACE) | |
910 | zlog_debug( | |
911 | "%s: Received prune with no relevant ifchannel %s(%s) state: %d", | |
912 | __PRETTY_FUNCTION__, ifp->name, | |
913 | pim_str_sg_dump(sg), source_flags); | |
914 | return; | |
915 | } | |
916 | ||
917 | ch = pim_ifchannel_add(ifp, sg, PIM_UPSTREAM_FLAG_MASK_SRC_PIM); | |
918 | if (!ch) | |
919 | return; | |
920 | ||
921 | pim_ifp = ifp->info; | |
922 | ||
923 | switch (ch->ifjoin_state) { | |
924 | case PIM_IFJOIN_NOINFO: | |
925 | if (source_flags & PIM_ENCODE_RPT_BIT) { | |
926 | if (!(source_flags & PIM_ENCODE_WC_BIT)) | |
927 | PIM_IF_FLAG_SET_S_G_RPT(ch->flags); | |
928 | ||
929 | ch->ifjoin_state = PIM_IFJOIN_PRUNE_PENDING; | |
930 | if (listcount(pim_ifp->pim_neighbor_list) > 1) | |
931 | jp_override_interval_msec = | |
932 | pim_if_jp_override_interval_msec(ifp); | |
933 | else | |
934 | jp_override_interval_msec = | |
935 | 0; /* schedule to expire immediately */ | |
936 | /* If we called ifjoin_prune() directly instead, care | |
937 | should | |
938 | be taken not to use "ch" afterwards since it would be | |
939 | deleted. */ | |
940 | ||
941 | THREAD_OFF(ch->t_ifjoin_prune_pending_timer); | |
942 | THREAD_OFF(ch->t_ifjoin_expiry_timer); | |
943 | thread_add_timer_msec( | |
944 | master, on_ifjoin_prune_pending_timer, ch, | |
945 | jp_override_interval_msec, | |
946 | &ch->t_ifjoin_prune_pending_timer); | |
947 | thread_add_timer(master, on_ifjoin_expiry_timer, ch, | |
948 | holdtime, &ch->t_ifjoin_expiry_timer); | |
9b29ea95 DS |
949 | pim_upstream_update_join_desired(pim_ifp->pim, |
950 | ch->upstream); | |
d62a17ae | 951 | } |
952 | break; | |
953 | case PIM_IFJOIN_PRUNE_PENDING: | |
954 | /* nothing to do */ | |
955 | break; | |
956 | case PIM_IFJOIN_JOIN: | |
957 | THREAD_OFF(ch->t_ifjoin_expiry_timer); | |
958 | ||
959 | pim_ifchannel_ifjoin_switch(__PRETTY_FUNCTION__, ch, | |
960 | PIM_IFJOIN_PRUNE_PENDING); | |
961 | ||
962 | if (listcount(pim_ifp->pim_neighbor_list) > 1) | |
963 | jp_override_interval_msec = | |
964 | pim_if_jp_override_interval_msec(ifp); | |
965 | else | |
966 | jp_override_interval_msec = | |
967 | 0; /* schedule to expire immediately */ | |
968 | /* If we called ifjoin_prune() directly instead, care should | |
969 | be taken not to use "ch" afterwards since it would be | |
970 | deleted. */ | |
971 | THREAD_OFF(ch->t_ifjoin_prune_pending_timer); | |
972 | thread_add_timer_msec(master, on_ifjoin_prune_pending_timer, ch, | |
973 | jp_override_interval_msec, | |
974 | &ch->t_ifjoin_prune_pending_timer); | |
975 | break; | |
976 | case PIM_IFJOIN_PRUNE: | |
977 | if (source_flags & PIM_ENCODE_RPT_BIT) { | |
978 | THREAD_OFF(ch->t_ifjoin_prune_pending_timer); | |
979 | thread_add_timer(master, on_ifjoin_expiry_timer, ch, | |
980 | holdtime, &ch->t_ifjoin_expiry_timer); | |
981 | } | |
982 | break; | |
983 | case PIM_IFJOIN_PRUNE_TMP: | |
984 | if (source_flags & PIM_ENCODE_RPT_BIT) { | |
985 | ch->ifjoin_state = PIM_IFJOIN_PRUNE; | |
986 | THREAD_OFF(ch->t_ifjoin_expiry_timer); | |
987 | thread_add_timer(master, on_ifjoin_expiry_timer, ch, | |
988 | holdtime, &ch->t_ifjoin_expiry_timer); | |
989 | } | |
990 | break; | |
991 | case PIM_IFJOIN_PRUNE_PENDING_TMP: | |
992 | if (source_flags & PIM_ENCODE_RPT_BIT) { | |
993 | ch->ifjoin_state = PIM_IFJOIN_PRUNE_PENDING; | |
994 | THREAD_OFF(ch->t_ifjoin_expiry_timer); | |
995 | thread_add_timer(master, on_ifjoin_expiry_timer, ch, | |
996 | holdtime, &ch->t_ifjoin_expiry_timer); | |
997 | } | |
998 | break; | |
999 | } | |
12e41d03 DL |
1000 | } |
1001 | ||
d62a17ae | 1002 | int pim_ifchannel_local_membership_add(struct interface *ifp, |
1003 | struct prefix_sg *sg) | |
12e41d03 | 1004 | { |
d62a17ae | 1005 | struct pim_ifchannel *ch, *starch; |
1006 | struct pim_interface *pim_ifp; | |
43e40fdf | 1007 | struct pim_instance *pim; |
d62a17ae | 1008 | |
1009 | /* PIM enabled on interface? */ | |
1010 | pim_ifp = ifp->info; | |
1011 | if (!pim_ifp) | |
1012 | return 0; | |
1013 | if (!PIM_IF_TEST_PIM(pim_ifp->options)) | |
1014 | return 0; | |
1015 | ||
43e40fdf DS |
1016 | pim = pim_ifp->pim; |
1017 | ||
d62a17ae | 1018 | /* skip (*,G) ch creation if G is of type SSM */ |
1019 | if (sg->src.s_addr == INADDR_ANY) { | |
6f439a70 | 1020 | if (pim_is_grp_ssm(pim, sg->grp)) { |
d62a17ae | 1021 | if (PIM_DEBUG_PIM_EVENTS) |
1022 | zlog_debug( | |
1023 | "%s: local membership (S,G)=%s ignored as group is SSM", | |
1024 | __PRETTY_FUNCTION__, | |
1025 | pim_str_sg_dump(sg)); | |
1026 | return 1; | |
1027 | } | |
1028 | } | |
1029 | ||
1030 | ch = pim_ifchannel_add(ifp, sg, PIM_UPSTREAM_FLAG_MASK_SRC_IGMP); | |
1031 | if (!ch) { | |
1032 | return 0; | |
1033 | } | |
1034 | ||
1035 | ifmembership_set(ch, PIM_IFMEMBERSHIP_INCLUDE); | |
1036 | ||
1037 | if (sg->src.s_addr == INADDR_ANY) { | |
9b29ea95 | 1038 | struct pim_upstream *up = pim_upstream_find(pim, sg); |
d62a17ae | 1039 | struct pim_upstream *child; |
1040 | struct listnode *up_node; | |
1041 | ||
1042 | starch = ch; | |
1043 | ||
1044 | for (ALL_LIST_ELEMENTS_RO(up->sources, up_node, child)) { | |
1045 | if (PIM_DEBUG_EVENTS) | |
1046 | zlog_debug("%s %s: IGMP (S,G)=%s(%s) from %s", | |
1047 | __FILE__, __PRETTY_FUNCTION__, | |
1048 | child->sg_str, ifp->name, | |
1049 | up->sg_str); | |
1050 | ||
1051 | ch = pim_ifchannel_find(ifp, &child->sg); | |
1052 | if (pim_upstream_evaluate_join_desired_interface( | |
1053 | child, ch, starch)) { | |
1054 | pim_channel_add_oif(child->channel_oil, ifp, | |
1055 | PIM_OIF_FLAG_PROTO_STAR); | |
1eca8576 DS |
1056 | pim_upstream_switch(pim, child, |
1057 | PIM_UPSTREAM_JOINED); | |
d62a17ae | 1058 | } |
1059 | } | |
1060 | ||
43e40fdf | 1061 | if (pim->spt.switchover == PIM_SPT_INFINITY) { |
f88df3a6 | 1062 | if (pim->spt.plist) { |
d62a17ae | 1063 | struct prefix_list *plist = prefix_list_lookup( |
43e40fdf | 1064 | AFI_IP, pim->spt.plist); |
d62a17ae | 1065 | struct prefix g; |
1066 | g.family = AF_INET; | |
1067 | g.prefixlen = IPV4_MAX_PREFIXLEN; | |
1068 | g.u.prefix4 = up->sg.grp; | |
1069 | ||
1070 | if (prefix_list_apply(plist, &g) | |
1071 | == PREFIX_DENY) { | |
1072 | pim_channel_add_oif( | |
43e40fdf | 1073 | up->channel_oil, pim->regiface, |
d62a17ae | 1074 | PIM_OIF_FLAG_PROTO_IGMP); |
1075 | } | |
1076 | } | |
1077 | } else | |
43e40fdf | 1078 | pim_channel_add_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1079 | PIM_OIF_FLAG_PROTO_IGMP); |
1080 | } | |
1081 | ||
1082 | return 1; | |
12e41d03 DL |
1083 | } |
1084 | ||
1085 | void pim_ifchannel_local_membership_del(struct interface *ifp, | |
4ed0af70 | 1086 | struct prefix_sg *sg) |
12e41d03 | 1087 | { |
d62a17ae | 1088 | struct pim_ifchannel *starch, *ch, *orig; |
1089 | struct pim_interface *pim_ifp; | |
1090 | ||
1091 | /* PIM enabled on interface? */ | |
1092 | pim_ifp = ifp->info; | |
1093 | if (!pim_ifp) | |
1094 | return; | |
1095 | if (!PIM_IF_TEST_PIM(pim_ifp->options)) | |
1096 | return; | |
1097 | ||
1098 | orig = ch = pim_ifchannel_find(ifp, sg); | |
1099 | if (!ch) | |
1100 | return; | |
1101 | ||
1102 | ifmembership_set(ch, PIM_IFMEMBERSHIP_NOINFO); | |
1103 | ||
1104 | if (sg->src.s_addr == INADDR_ANY) { | |
9b29ea95 | 1105 | struct pim_upstream *up = pim_upstream_find(pim_ifp->pim, sg); |
d62a17ae | 1106 | struct pim_upstream *child; |
1107 | struct listnode *up_node, *up_nnode; | |
1108 | ||
1109 | starch = ch; | |
1110 | ||
1111 | for (ALL_LIST_ELEMENTS(up->sources, up_node, up_nnode, child)) { | |
1112 | struct channel_oil *c_oil = child->channel_oil; | |
1113 | struct pim_ifchannel *chchannel = | |
1114 | pim_ifchannel_find(ifp, &child->sg); | |
1115 | struct pim_interface *pim_ifp = ifp->info; | |
1116 | ||
1117 | if (PIM_DEBUG_EVENTS) | |
1118 | zlog_debug("%s %s: Prune(S,G)=%s(%s) from %s", | |
1119 | __FILE__, __PRETTY_FUNCTION__, | |
1120 | up->sg_str, ifp->name, | |
1121 | child->sg_str); | |
1122 | ||
1123 | ch = pim_ifchannel_find(ifp, &child->sg); | |
1124 | if (c_oil | |
1125 | && !pim_upstream_evaluate_join_desired_interface( | |
1126 | child, ch, starch)) | |
1127 | pim_channel_del_oif(c_oil, ifp, | |
1128 | PIM_OIF_FLAG_PROTO_STAR); | |
1129 | ||
1130 | /* | |
1131 | * If the S,G has no if channel and the c_oil still | |
1132 | * has output here then the *,G was supplying the | |
1133 | * implied | |
1134 | * if channel. So remove it. | |
1135 | */ | |
1136 | if (!chchannel && c_oil | |
1137 | && c_oil->oil.mfcc_ttls[pim_ifp->mroute_vif_index]) | |
1138 | pim_channel_del_oif(c_oil, ifp, | |
1139 | PIM_OIF_FLAG_PROTO_STAR); | |
1140 | ||
1141 | /* Child node removal/ref count-- will happen as part of | |
1142 | * parent' delete_no_info */ | |
1143 | } | |
1144 | } | |
1145 | delete_on_noinfo(orig); | |
12e41d03 DL |
1146 | } |
1147 | ||
1148 | void pim_ifchannel_update_could_assert(struct pim_ifchannel *ch) | |
1149 | { | |
d62a17ae | 1150 | int old_couldassert = |
1151 | PIM_FORCE_BOOLEAN(PIM_IF_FLAG_TEST_COULD_ASSERT(ch->flags)); | |
1152 | int new_couldassert = | |
1153 | PIM_FORCE_BOOLEAN(pim_macro_ch_could_assert_eval(ch)); | |
1154 | ||
1155 | if (new_couldassert == old_couldassert) | |
1156 | return; | |
1157 | ||
1158 | if (PIM_DEBUG_PIM_EVENTS) { | |
1159 | char src_str[INET_ADDRSTRLEN]; | |
1160 | char grp_str[INET_ADDRSTRLEN]; | |
1161 | pim_inet4_dump("<src?>", ch->sg.src, src_str, sizeof(src_str)); | |
1162 | pim_inet4_dump("<grp?>", ch->sg.grp, grp_str, sizeof(grp_str)); | |
1163 | zlog_debug("%s: CouldAssert(%s,%s,%s) changed from %d to %d", | |
1164 | __PRETTY_FUNCTION__, src_str, grp_str, | |
1165 | ch->interface->name, old_couldassert, | |
1166 | new_couldassert); | |
1167 | } | |
1168 | ||
1169 | if (new_couldassert) { | |
1170 | /* CouldAssert(S,G,I) switched from FALSE to TRUE */ | |
1171 | PIM_IF_FLAG_SET_COULD_ASSERT(ch->flags); | |
1172 | } else { | |
1173 | /* CouldAssert(S,G,I) switched from TRUE to FALSE */ | |
1174 | PIM_IF_FLAG_UNSET_COULD_ASSERT(ch->flags); | |
1175 | ||
1176 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_WINNER) { | |
1177 | assert_action_a4(ch); | |
1178 | } | |
1179 | } | |
1180 | ||
1181 | pim_ifchannel_update_my_assert_metric(ch); | |
12e41d03 DL |
1182 | } |
1183 | ||
1184 | /* | |
1185 | my_assert_metric may be affected by: | |
1186 | ||
1187 | CouldAssert(S,G) | |
1188 | pim_ifp->primary_address | |
1189 | rpf->source_nexthop.mrib_metric_preference; | |
1190 | rpf->source_nexthop.mrib_route_metric; | |
1191 | */ | |
1192 | void pim_ifchannel_update_my_assert_metric(struct pim_ifchannel *ch) | |
1193 | { | |
d62a17ae | 1194 | struct pim_assert_metric my_metric_new = |
1195 | pim_macro_ch_my_assert_metric_eval(ch); | |
1196 | ||
1197 | if (pim_assert_metric_match(&my_metric_new, &ch->ifassert_my_metric)) | |
1198 | return; | |
1199 | ||
1200 | if (PIM_DEBUG_PIM_EVENTS) { | |
1201 | char src_str[INET_ADDRSTRLEN]; | |
1202 | char grp_str[INET_ADDRSTRLEN]; | |
1203 | char old_addr_str[INET_ADDRSTRLEN]; | |
1204 | char new_addr_str[INET_ADDRSTRLEN]; | |
1205 | pim_inet4_dump("<src?>", ch->sg.src, src_str, sizeof(src_str)); | |
1206 | pim_inet4_dump("<grp?>", ch->sg.grp, grp_str, sizeof(grp_str)); | |
1207 | pim_inet4_dump("<old_addr?>", ch->ifassert_my_metric.ip_address, | |
1208 | old_addr_str, sizeof(old_addr_str)); | |
1209 | pim_inet4_dump("<new_addr?>", my_metric_new.ip_address, | |
1210 | new_addr_str, sizeof(new_addr_str)); | |
1211 | zlog_debug( | |
1212 | "%s: my_assert_metric(%s,%s,%s) changed from %u,%u,%u,%s to %u,%u,%u,%s", | |
1213 | __PRETTY_FUNCTION__, src_str, grp_str, | |
1214 | ch->interface->name, | |
1215 | ch->ifassert_my_metric.rpt_bit_flag, | |
1216 | ch->ifassert_my_metric.metric_preference, | |
1217 | ch->ifassert_my_metric.route_metric, old_addr_str, | |
1218 | my_metric_new.rpt_bit_flag, | |
1219 | my_metric_new.metric_preference, | |
1220 | my_metric_new.route_metric, new_addr_str); | |
1221 | } | |
1222 | ||
1223 | ch->ifassert_my_metric = my_metric_new; | |
1224 | ||
1225 | if (pim_assert_metric_better(&ch->ifassert_my_metric, | |
1226 | &ch->ifassert_winner_metric)) { | |
1227 | assert_action_a5(ch); | |
1228 | } | |
12e41d03 DL |
1229 | } |
1230 | ||
1231 | void pim_ifchannel_update_assert_tracking_desired(struct pim_ifchannel *ch) | |
1232 | { | |
d62a17ae | 1233 | int old_atd = PIM_FORCE_BOOLEAN( |
1234 | PIM_IF_FLAG_TEST_ASSERT_TRACKING_DESIRED(ch->flags)); | |
1235 | int new_atd = | |
1236 | PIM_FORCE_BOOLEAN(pim_macro_assert_tracking_desired_eval(ch)); | |
1237 | ||
1238 | if (new_atd == old_atd) | |
1239 | return; | |
1240 | ||
1241 | if (PIM_DEBUG_PIM_EVENTS) { | |
1242 | char src_str[INET_ADDRSTRLEN]; | |
1243 | char grp_str[INET_ADDRSTRLEN]; | |
1244 | pim_inet4_dump("<src?>", ch->sg.src, src_str, sizeof(src_str)); | |
1245 | pim_inet4_dump("<grp?>", ch->sg.grp, grp_str, sizeof(grp_str)); | |
1246 | zlog_debug( | |
1247 | "%s: AssertTrackingDesired(%s,%s,%s) changed from %d to %d", | |
1248 | __PRETTY_FUNCTION__, src_str, grp_str, | |
1249 | ch->interface->name, old_atd, new_atd); | |
1250 | } | |
1251 | ||
1252 | if (new_atd) { | |
1253 | /* AssertTrackingDesired(S,G,I) switched from FALSE to TRUE */ | |
1254 | PIM_IF_FLAG_SET_ASSERT_TRACKING_DESIRED(ch->flags); | |
1255 | } else { | |
1256 | /* AssertTrackingDesired(S,G,I) switched from TRUE to FALSE */ | |
1257 | PIM_IF_FLAG_UNSET_ASSERT_TRACKING_DESIRED(ch->flags); | |
1258 | ||
1259 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { | |
1260 | assert_action_a5(ch); | |
1261 | } | |
1262 | } | |
12e41d03 | 1263 | } |
c8507a16 DS |
1264 | |
1265 | /* | |
1266 | * If we have a new pim interface, check to | |
1267 | * see if any of the pre-existing channels have | |
1268 | * their upstream out that way and turn on forwarding | |
1269 | * for that ifchannel then. | |
1270 | */ | |
d62a17ae | 1271 | void pim_ifchannel_scan_forward_start(struct interface *new_ifp) |
c8507a16 | 1272 | { |
d62a17ae | 1273 | struct listnode *ifnode; |
1274 | struct interface *ifp; | |
1275 | struct pim_interface *new_pim_ifp = new_ifp->info; | |
f88df3a6 | 1276 | struct pim_instance *pim = new_pim_ifp->pim; |
d62a17ae | 1277 | |
f88df3a6 | 1278 | for (ALL_LIST_ELEMENTS_RO(vrf_iflist(pim->vrf_id), ifnode, ifp)) { |
d62a17ae | 1279 | struct pim_interface *loop_pim_ifp = ifp->info; |
1280 | struct listnode *ch_node; | |
1281 | struct pim_ifchannel *ch; | |
1282 | ||
1283 | if (!loop_pim_ifp) | |
1284 | continue; | |
1285 | ||
1286 | if (new_pim_ifp == loop_pim_ifp) | |
1287 | continue; | |
1288 | ||
1289 | for (ALL_LIST_ELEMENTS_RO(loop_pim_ifp->pim_ifchannel_list, | |
1290 | ch_node, ch)) { | |
1291 | if (ch->ifjoin_state == PIM_IFJOIN_JOIN) { | |
1292 | struct pim_upstream *up = ch->upstream; | |
1293 | if ((!up->channel_oil) | |
1294 | && (up->rpf.source_nexthop | |
1295 | .interface == new_ifp)) | |
1296 | pim_forward_start(ch); | |
1297 | } | |
1298 | } | |
1299 | } | |
c8507a16 | 1300 | } |
220d8a49 DS |
1301 | |
1302 | /* | |
1303 | * Downstream per-interface (S,G,rpt) state machine | |
1304 | * states that we need to move (S,G,rpt) items | |
1305 | * into different states at the start of the | |
1306 | * reception of a *,G join as well, when | |
1307 | * we get End of Message | |
1308 | */ | |
d62a17ae | 1309 | void pim_ifchannel_set_star_g_join_state(struct pim_ifchannel *ch, int eom, |
1310 | uint8_t source_flags, uint8_t join, | |
1311 | uint8_t starg_alone) | |
220d8a49 | 1312 | { |
d62a17ae | 1313 | struct pim_ifchannel *child; |
1314 | struct listnode *ch_node; | |
1315 | ||
1316 | if (PIM_DEBUG_PIM_TRACE) | |
1317 | zlog_debug( | |
1318 | "%s: %s %s eom: %d join %u", __PRETTY_FUNCTION__, | |
1319 | pim_ifchannel_ifjoin_name(ch->ifjoin_state, ch->flags), | |
1320 | ch->sg_str, eom, join); | |
1321 | if (!ch->sources) | |
1322 | return; | |
1323 | ||
1324 | for (ALL_LIST_ELEMENTS_RO(ch->sources, ch_node, child)) { | |
1325 | /* Only *,G Join received and no (SG-RPT) prune. | |
1326 | eom = 1, only (W,G) join_alone is true, WC and RPT are set. | |
1327 | Scan all S,G associated to G and if any SG-RPT | |
1328 | remove the SG-RPT flag. | |
1329 | */ | |
1330 | if (eom && starg_alone && (source_flags & PIM_RPT_BIT_MASK) | |
1331 | && (source_flags & PIM_WILDCARD_BIT_MASK)) { | |
1332 | if (PIM_IF_FLAG_TEST_S_G_RPT(child->flags)) { | |
1333 | struct pim_upstream *up = child->upstream; | |
1334 | ||
1335 | PIM_IF_FLAG_UNSET_S_G_RPT(child->flags); | |
1336 | if (up) { | |
1337 | if (PIM_DEBUG_TRACE) | |
1338 | zlog_debug( | |
1339 | "%s: SGRpt flag is cleared, add inherit oif to up %s", | |
1340 | __PRETTY_FUNCTION__, | |
1341 | up->sg_str); | |
1342 | pim_channel_add_oif( | |
1343 | up->channel_oil, ch->interface, | |
1344 | PIM_OIF_FLAG_PROTO_STAR); | |
1345 | pim_ifchannel_ifjoin_switch( | |
1346 | __PRETTY_FUNCTION__, child, | |
1347 | PIM_IFJOIN_JOIN); | |
1348 | } | |
1349 | } | |
1350 | } | |
1351 | ||
1352 | if (!PIM_IF_FLAG_TEST_S_G_RPT(child->flags)) | |
1353 | continue; | |
1354 | ||
1355 | switch (child->ifjoin_state) { | |
1356 | case PIM_IFJOIN_NOINFO: | |
1357 | case PIM_IFJOIN_JOIN: | |
1358 | break; | |
1359 | case PIM_IFJOIN_PRUNE: | |
1360 | if (!eom) | |
1361 | child->ifjoin_state = PIM_IFJOIN_PRUNE_TMP; | |
1362 | break; | |
1363 | case PIM_IFJOIN_PRUNE_PENDING: | |
1364 | if (!eom) | |
1365 | child->ifjoin_state = | |
1366 | PIM_IFJOIN_PRUNE_PENDING_TMP; | |
1367 | break; | |
1368 | case PIM_IFJOIN_PRUNE_TMP: | |
1369 | case PIM_IFJOIN_PRUNE_PENDING_TMP: | |
1370 | if (eom) | |
1371 | child->ifjoin_state = PIM_IFJOIN_NOINFO; | |
1372 | break; | |
1373 | } | |
1405c852 | 1374 | } |
220d8a49 | 1375 | } |
a625e937 | 1376 | |
d62a17ae | 1377 | unsigned int pim_ifchannel_hash_key(void *arg) |
a625e937 | 1378 | { |
d62a17ae | 1379 | struct pim_ifchannel *ch = (struct pim_ifchannel *)arg; |
a625e937 | 1380 | |
d62a17ae | 1381 | return jhash_2words(ch->sg.src.s_addr, ch->sg.grp.s_addr, 0); |
a625e937 DS |
1382 | } |
1383 | ||
d62a17ae | 1384 | int pim_ifchannel_equal(const void *arg1, const void *arg2) |
a625e937 | 1385 | { |
d62a17ae | 1386 | const struct pim_ifchannel *ch1 = (const struct pim_ifchannel *)arg1; |
1387 | const struct pim_ifchannel *ch2 = (const struct pim_ifchannel *)arg2; | |
a625e937 | 1388 | |
d62a17ae | 1389 | if ((ch1->sg.grp.s_addr == ch2->sg.grp.s_addr) |
1390 | && (ch1->sg.src.s_addr == ch2->sg.src.s_addr)) | |
1391 | return 1; | |
a625e937 | 1392 | |
d62a17ae | 1393 | return 0; |
a625e937 | 1394 | } |