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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" |
c206937b | 45 | #include "pim_rp.h" |
12e41d03 | 46 | |
ad7b74c4 DS |
47 | RB_GENERATE(pim_ifchannel_rb, pim_ifchannel, |
48 | pim_ifp_rb, pim_ifchannel_compare); | |
49 | ||
50 | int pim_ifchannel_compare(const struct pim_ifchannel *ch1, | |
51 | const struct pim_ifchannel *ch2) | |
3fdfd943 | 52 | { |
d62a17ae | 53 | struct pim_interface *pim_ifp1; |
54 | struct pim_interface *pim_ifp2; | |
3fdfd943 | 55 | |
d62a17ae | 56 | pim_ifp1 = ch1->interface->info; |
57 | pim_ifp2 = ch2->interface->info; | |
3fdfd943 | 58 | |
d62a17ae | 59 | if (pim_ifp1->mroute_vif_index < pim_ifp2->mroute_vif_index) |
60 | return -1; | |
3fdfd943 | 61 | |
d62a17ae | 62 | if (pim_ifp1->mroute_vif_index > pim_ifp2->mroute_vif_index) |
63 | return 1; | |
3fdfd943 | 64 | |
d62a17ae | 65 | if (ntohl(ch1->sg.grp.s_addr) < ntohl(ch2->sg.grp.s_addr)) |
66 | return -1; | |
3fdfd943 | 67 | |
d62a17ae | 68 | if (ntohl(ch1->sg.grp.s_addr) > ntohl(ch2->sg.grp.s_addr)) |
69 | return 1; | |
3fdfd943 | 70 | |
d62a17ae | 71 | if (ntohl(ch1->sg.src.s_addr) < ntohl(ch2->sg.src.s_addr)) |
72 | return -1; | |
3fdfd943 | 73 | |
d62a17ae | 74 | if (ntohl(ch1->sg.src.s_addr) > ntohl(ch2->sg.src.s_addr)) |
75 | return 1; | |
3fdfd943 | 76 | |
d62a17ae | 77 | return 0; |
3fdfd943 DS |
78 | } |
79 | ||
1a10fc74 DS |
80 | /* |
81 | * A (*,G) or a (*,*) is going away | |
82 | * remove the parent pointer from | |
83 | * those pointing at us | |
84 | */ | |
d62a17ae | 85 | static void pim_ifchannel_remove_children(struct pim_ifchannel *ch) |
1a10fc74 | 86 | { |
d62a17ae | 87 | struct pim_ifchannel *child; |
1a10fc74 | 88 | |
d62a17ae | 89 | if (!ch->sources) |
90 | return; | |
1a10fc74 | 91 | |
d62a17ae | 92 | while (!list_isempty(ch->sources)) { |
93 | child = listnode_head(ch->sources); | |
94 | child->parent = NULL; | |
95 | listnode_delete(ch->sources, child); | |
96 | } | |
1a10fc74 DS |
97 | } |
98 | ||
99 | /* | |
100 | * A (*,G) or a (*,*) is being created | |
101 | * find all the children that would point | |
102 | * at us. | |
103 | */ | |
d62a17ae | 104 | static void pim_ifchannel_find_new_children(struct pim_ifchannel *ch) |
1a10fc74 | 105 | { |
d62a17ae | 106 | struct pim_interface *pim_ifp = ch->interface->info; |
107 | struct pim_ifchannel *child; | |
d62a17ae | 108 | |
109 | // Basic Sanity that we are not being silly | |
110 | if ((ch->sg.src.s_addr != INADDR_ANY) | |
111 | && (ch->sg.grp.s_addr != INADDR_ANY)) | |
112 | return; | |
113 | ||
114 | if ((ch->sg.src.s_addr == INADDR_ANY) | |
115 | && (ch->sg.grp.s_addr == INADDR_ANY)) | |
116 | return; | |
117 | ||
a2addae8 | 118 | RB_FOREACH (child, pim_ifchannel_rb, &pim_ifp->ifchannel_rb) { |
d62a17ae | 119 | if ((ch->sg.grp.s_addr != INADDR_ANY) |
120 | && (child->sg.grp.s_addr == ch->sg.grp.s_addr) | |
121 | && (child != ch)) { | |
122 | child->parent = ch; | |
123 | listnode_add_sort(ch->sources, child); | |
124 | } | |
3fdfd943 | 125 | } |
1a10fc74 DS |
126 | } |
127 | ||
12e41d03 DL |
128 | void pim_ifchannel_free(struct pim_ifchannel *ch) |
129 | { | |
d62a17ae | 130 | XFREE(MTYPE_PIM_IFCHANNEL, ch); |
12e41d03 DL |
131 | } |
132 | ||
133 | void pim_ifchannel_delete(struct pim_ifchannel *ch) | |
134 | { | |
d62a17ae | 135 | struct pim_interface *pim_ifp; |
136 | ||
137 | pim_ifp = ch->interface->info; | |
138 | ||
139 | if (ch->upstream->channel_oil) { | |
140 | uint32_t mask = PIM_OIF_FLAG_PROTO_PIM; | |
141 | if (ch->upstream->flags & PIM_UPSTREAM_FLAG_MASK_SRC_IGMP) | |
142 | mask = PIM_OIF_FLAG_PROTO_IGMP; | |
143 | ||
144 | /* SGRpt entry could have empty oil */ | |
145 | if (ch->upstream->channel_oil) | |
146 | pim_channel_del_oif(ch->upstream->channel_oil, | |
147 | ch->interface, mask); | |
148 | /* | |
149 | * Do we have any S,G's that are inheriting? | |
150 | * Nuke from on high too. | |
151 | */ | |
152 | if (ch->upstream->sources) { | |
153 | struct pim_upstream *child; | |
154 | struct listnode *up_node; | |
155 | ||
156 | for (ALL_LIST_ELEMENTS_RO(ch->upstream->sources, | |
157 | up_node, child)) | |
158 | pim_channel_del_oif(child->channel_oil, | |
159 | ch->interface, | |
160 | PIM_OIF_FLAG_PROTO_STAR); | |
161 | } | |
162 | } | |
163 | ||
164 | /* | |
165 | * When this channel is removed | |
166 | * we need to find all our children | |
167 | * and make sure our pointers are fixed | |
168 | */ | |
169 | pim_ifchannel_remove_children(ch); | |
170 | ||
171 | if (ch->sources) | |
172 | list_delete(ch->sources); | |
173 | ||
174 | listnode_delete(ch->upstream->ifchannels, ch); | |
175 | ||
176 | if (ch->ifjoin_state != PIM_IFJOIN_NOINFO) { | |
9b29ea95 | 177 | pim_upstream_update_join_desired(pim_ifp->pim, ch->upstream); |
ef71d1f8 | 178 | } |
d62a17ae | 179 | |
180 | /* upstream is common across ifchannels, check if upstream's | |
181 | ifchannel list is empty before deleting upstream_del | |
182 | ref count will take care of it. | |
183 | */ | |
9b29ea95 | 184 | pim_upstream_del(pim_ifp->pim, ch->upstream, __PRETTY_FUNCTION__); |
d62a17ae | 185 | ch->upstream = NULL; |
186 | ||
187 | THREAD_OFF(ch->t_ifjoin_expiry_timer); | |
188 | THREAD_OFF(ch->t_ifjoin_prune_pending_timer); | |
189 | THREAD_OFF(ch->t_ifassert_timer); | |
190 | ||
191 | if (ch->parent) { | |
192 | listnode_delete(ch->parent->sources, ch); | |
193 | ch->parent = NULL; | |
194 | } | |
ad7b74c4 DS |
195 | |
196 | RB_REMOVE(pim_ifchannel_rb, &pim_ifp->ifchannel_rb, ch); | |
d62a17ae | 197 | |
198 | if (PIM_DEBUG_PIM_TRACE) | |
199 | zlog_debug("%s: ifchannel entry %s is deleted ", | |
200 | __PRETTY_FUNCTION__, ch->sg_str); | |
201 | ||
202 | pim_ifchannel_free(ch); | |
12e41d03 | 203 | } |
cb24fec4 | 204 | |
d62a17ae | 205 | void pim_ifchannel_delete_all(struct interface *ifp) |
cb24fec4 | 206 | { |
d62a17ae | 207 | struct pim_interface *pim_ifp; |
ad7b74c4 | 208 | struct pim_ifchannel *ch; |
d62a17ae | 209 | |
210 | pim_ifp = ifp->info; | |
211 | if (!pim_ifp) | |
212 | return; | |
213 | ||
ad7b74c4 DS |
214 | while ((ch = RB_ROOT(pim_ifchannel_rb, |
215 | &pim_ifp->ifchannel_rb)) != NULL) { | |
216 | pim_ifchannel_delete(ch); | |
d62a17ae | 217 | } |
cb24fec4 | 218 | } |
d62a17ae | 219 | |
12e41d03 DL |
220 | static void delete_on_noinfo(struct pim_ifchannel *ch) |
221 | { | |
d62a17ae | 222 | if (ch->local_ifmembership == PIM_IFMEMBERSHIP_NOINFO |
223 | && ch->ifjoin_state == PIM_IFJOIN_NOINFO | |
224 | && ch->t_ifjoin_expiry_timer == NULL) | |
225 | pim_ifchannel_delete(ch); | |
12e41d03 DL |
226 | } |
227 | ||
d62a17ae | 228 | void pim_ifchannel_ifjoin_switch(const char *caller, struct pim_ifchannel *ch, |
12e41d03 DL |
229 | enum pim_ifjoin_state new_state) |
230 | { | |
d62a17ae | 231 | enum pim_ifjoin_state old_state = ch->ifjoin_state; |
9b29ea95 | 232 | struct pim_interface *pim_ifp = ch->interface->info; |
d62a17ae | 233 | |
234 | if (PIM_DEBUG_PIM_EVENTS) | |
235 | zlog_debug( | |
236 | "PIM_IFCHANNEL(%s): %s is switching from %s to %s", | |
237 | ch->interface->name, ch->sg_str, | |
238 | pim_ifchannel_ifjoin_name(ch->ifjoin_state, ch->flags), | |
239 | pim_ifchannel_ifjoin_name(new_state, 0)); | |
240 | ||
241 | ||
242 | if (old_state == new_state) { | |
243 | if (PIM_DEBUG_PIM_EVENTS) { | |
244 | zlog_debug( | |
245 | "%s calledby %s: non-transition on state %d (%s)", | |
246 | __PRETTY_FUNCTION__, caller, new_state, | |
247 | pim_ifchannel_ifjoin_name(new_state, 0)); | |
6578dfa3 | 248 | } |
d62a17ae | 249 | return; |
250 | } | |
251 | ||
252 | ch->ifjoin_state = new_state; | |
253 | ||
254 | if (ch->sg.src.s_addr == INADDR_ANY) { | |
255 | struct pim_upstream *up = ch->upstream; | |
256 | struct pim_upstream *child; | |
257 | struct listnode *up_node; | |
258 | ||
259 | if (up) { | |
260 | if (ch->ifjoin_state == PIM_IFJOIN_NOINFO) { | |
261 | for (ALL_LIST_ELEMENTS_RO(up->sources, up_node, | |
262 | child)) { | |
263 | struct channel_oil *c_oil = | |
264 | child->channel_oil; | |
d62a17ae | 265 | |
266 | if (PIM_DEBUG_PIM_TRACE) | |
267 | zlog_debug( | |
268 | "%s %s: Prune(S,G)=%s from %s", | |
269 | __FILE__, | |
270 | __PRETTY_FUNCTION__, | |
271 | child->sg_str, | |
272 | up->sg_str); | |
273 | if (!c_oil) | |
274 | continue; | |
275 | ||
276 | if (!pim_upstream_evaluate_join_desired( | |
9b29ea95 | 277 | pim_ifp->pim, child)) { |
d62a17ae | 278 | pim_channel_del_oif( |
279 | c_oil, ch->interface, | |
280 | PIM_OIF_FLAG_PROTO_STAR); | |
281 | pim_upstream_update_join_desired( | |
9b29ea95 | 282 | pim_ifp->pim, child); |
d62a17ae | 283 | } |
284 | ||
285 | /* | |
286 | * If the S,G has no if channel and the | |
287 | * c_oil still | |
288 | * has output here then the *,G was | |
289 | * supplying the implied | |
290 | * if channel. So remove it. | |
291 | * I think this is dead code now. is it? | |
292 | */ | |
a88e628d DS |
293 | if (c_oil->oil.mfcc_ttls |
294 | [pim_ifp->mroute_vif_index]) | |
d62a17ae | 295 | pim_channel_del_oif( |
296 | c_oil, ch->interface, | |
297 | PIM_OIF_FLAG_PROTO_STAR); | |
298 | } | |
299 | } | |
300 | if (ch->ifjoin_state == PIM_IFJOIN_JOIN) { | |
301 | for (ALL_LIST_ELEMENTS_RO(up->sources, up_node, | |
302 | child)) { | |
303 | if (PIM_DEBUG_PIM_TRACE) | |
304 | zlog_debug( | |
305 | "%s %s: Join(S,G)=%s from %s", | |
306 | __FILE__, | |
307 | __PRETTY_FUNCTION__, | |
308 | child->sg_str, | |
309 | up->sg_str); | |
310 | ||
311 | if (pim_upstream_evaluate_join_desired( | |
9b29ea95 | 312 | pim_ifp->pim, child)) { |
d62a17ae | 313 | pim_channel_add_oif( |
314 | child->channel_oil, | |
315 | ch->interface, | |
316 | PIM_OIF_FLAG_PROTO_STAR); | |
317 | pim_upstream_update_join_desired( | |
9b29ea95 | 318 | pim_ifp->pim, child); |
d62a17ae | 319 | } |
320 | } | |
321 | } | |
6578dfa3 | 322 | } |
6578dfa3 | 323 | } |
d62a17ae | 324 | /* Transition to/from NOINFO ? */ |
325 | if ((old_state == PIM_IFJOIN_NOINFO) | |
326 | || (new_state == PIM_IFJOIN_NOINFO)) { | |
327 | ||
328 | if (PIM_DEBUG_PIM_EVENTS) { | |
329 | zlog_debug("PIM_IFCHANNEL_%s: (S,G)=%s on interface %s", | |
330 | ((new_state == PIM_IFJOIN_NOINFO) ? "DOWN" | |
331 | : "UP"), | |
332 | ch->sg_str, ch->interface->name); | |
333 | } | |
334 | ||
335 | /* | |
336 | Record uptime of state transition to/from NOINFO | |
337 | */ | |
338 | ch->ifjoin_creation = pim_time_monotonic_sec(); | |
339 | ||
9b29ea95 | 340 | pim_upstream_update_join_desired(pim_ifp->pim, ch->upstream); |
d62a17ae | 341 | pim_ifchannel_update_could_assert(ch); |
342 | pim_ifchannel_update_assert_tracking_desired(ch); | |
343 | } | |
12e41d03 DL |
344 | } |
345 | ||
d1e77284 | 346 | const char *pim_ifchannel_ifjoin_name(enum pim_ifjoin_state ifjoin_state, |
d62a17ae | 347 | int flags) |
12e41d03 | 348 | { |
d62a17ae | 349 | switch (ifjoin_state) { |
350 | case PIM_IFJOIN_NOINFO: | |
351 | if (PIM_IF_FLAG_TEST_S_G_RPT(flags)) | |
c206937b | 352 | return "SGRpt(NI)"; |
d62a17ae | 353 | else |
354 | return "NOINFO"; | |
355 | break; | |
356 | case PIM_IFJOIN_JOIN: | |
357 | return "JOIN"; | |
358 | break; | |
359 | case PIM_IFJOIN_PRUNE: | |
c206937b DS |
360 | if (PIM_IF_FLAG_TEST_S_G_RPT(flags)) |
361 | return "SGRpt(P)"; | |
362 | else | |
363 | return "PRUNE"; | |
d62a17ae | 364 | break; |
365 | case PIM_IFJOIN_PRUNE_PENDING: | |
c206937b DS |
366 | if (PIM_IF_FLAG_TEST_S_G_RPT(flags)) |
367 | return "SGRpt(PP)"; | |
368 | else | |
369 | return "PRUNEP"; | |
d62a17ae | 370 | break; |
371 | case PIM_IFJOIN_PRUNE_TMP: | |
c206937b DS |
372 | if (PIM_IF_FLAG_TEST_S_G_RPT(flags)) |
373 | return "SGRpt(P')"; | |
374 | else | |
375 | return "PRUNET"; | |
d62a17ae | 376 | break; |
377 | case PIM_IFJOIN_PRUNE_PENDING_TMP: | |
c206937b DS |
378 | if (PIM_IF_FLAG_TEST_S_G_RPT(flags)) |
379 | return "SGRpt(PP')"; | |
380 | else | |
381 | return "PRUNEPT"; | |
d62a17ae | 382 | break; |
383 | } | |
384 | ||
385 | return "ifjoin_bad_state"; | |
12e41d03 DL |
386 | } |
387 | ||
388 | const char *pim_ifchannel_ifassert_name(enum pim_ifassert_state ifassert_state) | |
389 | { | |
d62a17ae | 390 | switch (ifassert_state) { |
391 | case PIM_IFASSERT_NOINFO: | |
392 | return "NOINFO"; | |
393 | case PIM_IFASSERT_I_AM_WINNER: | |
394 | return "WINNER"; | |
395 | case PIM_IFASSERT_I_AM_LOSER: | |
396 | return "LOSER"; | |
397 | } | |
12e41d03 | 398 | |
d62a17ae | 399 | return "ifassert_bad_state"; |
12e41d03 DL |
400 | } |
401 | ||
402 | /* | |
403 | RFC 4601: 4.6.5. Assert State Macros | |
404 | ||
405 | AssertWinner(S,G,I) defaults to NULL and AssertWinnerMetric(S,G,I) | |
406 | defaults to Infinity when in the NoInfo state. | |
407 | */ | |
408 | void reset_ifassert_state(struct pim_ifchannel *ch) | |
409 | { | |
d62a17ae | 410 | struct in_addr any = {.s_addr = INADDR_ANY}; |
7656e7fc | 411 | |
d62a17ae | 412 | THREAD_OFF(ch->t_ifassert_timer); |
12e41d03 | 413 | |
d62a17ae | 414 | pim_ifassert_winner_set(ch, PIM_IFASSERT_NOINFO, any, |
415 | qpim_infinite_assert_metric); | |
12e41d03 DL |
416 | } |
417 | ||
12e41d03 | 418 | struct pim_ifchannel *pim_ifchannel_find(struct interface *ifp, |
4ed0af70 | 419 | struct prefix_sg *sg) |
12e41d03 | 420 | { |
d62a17ae | 421 | struct pim_interface *pim_ifp; |
422 | struct pim_ifchannel *ch; | |
423 | struct pim_ifchannel lookup; | |
12e41d03 | 424 | |
d62a17ae | 425 | pim_ifp = ifp->info; |
12e41d03 | 426 | |
d62a17ae | 427 | if (!pim_ifp) { |
428 | zlog_warn("%s: (S,G)=%s: multicast not enabled on interface %s", | |
429 | __PRETTY_FUNCTION__, pim_str_sg_dump(sg), ifp->name); | |
430 | return NULL; | |
431 | } | |
12e41d03 | 432 | |
d62a17ae | 433 | lookup.sg = *sg; |
ad7b74c4 DS |
434 | lookup.interface = ifp; |
435 | ch = RB_FIND(pim_ifchannel_rb, &pim_ifp->ifchannel_rb, &lookup); | |
12e41d03 | 436 | |
d62a17ae | 437 | return ch; |
12e41d03 DL |
438 | } |
439 | ||
440 | static void ifmembership_set(struct pim_ifchannel *ch, | |
441 | enum pim_ifmembership membership) | |
442 | { | |
9b29ea95 DS |
443 | struct pim_interface *pim_ifp = ch->interface->info; |
444 | ||
d62a17ae | 445 | if (ch->local_ifmembership == membership) |
446 | return; | |
447 | ||
448 | if (PIM_DEBUG_PIM_EVENTS) { | |
449 | zlog_debug("%s: (S,G)=%s membership now is %s on interface %s", | |
450 | __PRETTY_FUNCTION__, ch->sg_str, | |
451 | membership == PIM_IFMEMBERSHIP_INCLUDE ? "INCLUDE" | |
452 | : "NOINFO", | |
453 | ch->interface->name); | |
454 | } | |
455 | ||
456 | ch->local_ifmembership = membership; | |
457 | ||
9b29ea95 | 458 | pim_upstream_update_join_desired(pim_ifp->pim, ch->upstream); |
d62a17ae | 459 | pim_ifchannel_update_could_assert(ch); |
460 | pim_ifchannel_update_assert_tracking_desired(ch); | |
12e41d03 DL |
461 | } |
462 | ||
463 | ||
464 | void pim_ifchannel_membership_clear(struct interface *ifp) | |
465 | { | |
d62a17ae | 466 | struct pim_interface *pim_ifp; |
d62a17ae | 467 | struct pim_ifchannel *ch; |
12e41d03 | 468 | |
d62a17ae | 469 | pim_ifp = ifp->info; |
470 | zassert(pim_ifp); | |
12e41d03 | 471 | |
a2addae8 | 472 | RB_FOREACH (ch, pim_ifchannel_rb, &pim_ifp->ifchannel_rb) |
d62a17ae | 473 | ifmembership_set(ch, PIM_IFMEMBERSHIP_NOINFO); |
12e41d03 DL |
474 | } |
475 | ||
476 | void pim_ifchannel_delete_on_noinfo(struct interface *ifp) | |
477 | { | |
d62a17ae | 478 | struct pim_interface *pim_ifp; |
ad7b74c4 | 479 | struct pim_ifchannel *ch, *ch_tmp; |
12e41d03 | 480 | |
d62a17ae | 481 | pim_ifp = ifp->info; |
482 | zassert(pim_ifp); | |
12e41d03 | 483 | |
a2addae8 | 484 | RB_FOREACH_SAFE (ch, pim_ifchannel_rb, &pim_ifp->ifchannel_rb, ch_tmp) |
d62a17ae | 485 | delete_on_noinfo(ch); |
12e41d03 DL |
486 | } |
487 | ||
1a10fc74 DS |
488 | /* |
489 | * For a given Interface, if we are given a S,G | |
490 | * Find the *,G (If we have it). | |
491 | * If we are passed a *,G, find the *,* ifchannel | |
492 | * if we have it. | |
493 | */ | |
d62a17ae | 494 | static struct pim_ifchannel *pim_ifchannel_find_parent(struct pim_ifchannel *ch) |
1a10fc74 | 495 | { |
d62a17ae | 496 | struct prefix_sg parent_sg = ch->sg; |
497 | struct pim_ifchannel *parent = NULL; | |
498 | ||
499 | // (S,G) | |
500 | if ((parent_sg.src.s_addr != INADDR_ANY) | |
501 | && (parent_sg.grp.s_addr != INADDR_ANY)) { | |
502 | parent_sg.src.s_addr = INADDR_ANY; | |
503 | parent = pim_ifchannel_find(ch->interface, &parent_sg); | |
504 | ||
505 | if (parent) | |
506 | listnode_add(parent->sources, ch); | |
507 | return parent; | |
508 | } | |
509 | ||
510 | return NULL; | |
1a10fc74 DS |
511 | } |
512 | ||
d62a17ae | 513 | struct pim_ifchannel *pim_ifchannel_add(struct interface *ifp, |
0885a9f1 DS |
514 | struct prefix_sg *sg, |
515 | uint8_t source_flags, int up_flags) | |
12e41d03 | 516 | { |
d62a17ae | 517 | struct pim_interface *pim_ifp; |
518 | struct pim_ifchannel *ch; | |
519 | struct pim_upstream *up; | |
520 | ||
521 | ch = pim_ifchannel_find(ifp, sg); | |
522 | if (ch) | |
523 | return ch; | |
524 | ||
525 | pim_ifp = ifp->info; | |
526 | ||
d62a17ae | 527 | ch = XCALLOC(MTYPE_PIM_IFCHANNEL, sizeof(*ch)); |
528 | if (!ch) { | |
529 | zlog_warn( | |
530 | "%s: pim_ifchannel_new() failure for (S,G)=%s on interface %s", | |
74d1799a | 531 | __PRETTY_FUNCTION__, pim_str_sg_dump(sg), ifp->name); |
d62a17ae | 532 | return NULL; |
533 | } | |
534 | ||
535 | ch->flags = 0; | |
0885a9f1 DS |
536 | if ((source_flags & PIM_ENCODE_RPT_BIT) |
537 | && !(source_flags & PIM_ENCODE_WC_BIT)) | |
538 | PIM_IF_FLAG_SET_S_G_RPT(ch->flags); | |
539 | ||
d62a17ae | 540 | ch->interface = ifp; |
541 | ch->sg = *sg; | |
542 | pim_str_sg_set(sg, ch->sg_str); | |
543 | ch->parent = pim_ifchannel_find_parent(ch); | |
544 | if (ch->sg.src.s_addr == INADDR_ANY) { | |
545 | ch->sources = list_new(); | |
546 | ch->sources->cmp = | |
547 | (int (*)(void *, void *))pim_ifchannel_compare; | |
548 | } else | |
549 | ch->sources = NULL; | |
550 | ||
551 | pim_ifchannel_find_new_children(ch); | |
552 | ch->local_ifmembership = PIM_IFMEMBERSHIP_NOINFO; | |
553 | ||
554 | ch->ifjoin_state = PIM_IFJOIN_NOINFO; | |
555 | ch->t_ifjoin_expiry_timer = NULL; | |
556 | ch->t_ifjoin_prune_pending_timer = NULL; | |
557 | ch->ifjoin_creation = 0; | |
558 | ||
ad7b74c4 | 559 | RB_INSERT(pim_ifchannel_rb, &pim_ifp->ifchannel_rb, ch); |
0885a9f1 DS |
560 | |
561 | up = pim_upstream_add(pim_ifp->pim, sg, NULL, up_flags, | |
562 | __PRETTY_FUNCTION__, ch); | |
563 | ||
564 | if (!up) { | |
565 | zlog_err( | |
566 | "%s: could not attach upstream (S,G)=%s on interface %s", | |
567 | __PRETTY_FUNCTION__, pim_str_sg_dump(sg), ifp->name); | |
568 | ||
c6f94e19 DS |
569 | if (ch->parent) |
570 | listnode_delete(ch->parent->sources, ch); | |
571 | ||
0885a9f1 | 572 | pim_ifchannel_remove_children(ch); |
1e7a3a2a | 573 | if (ch->sources) |
0885a9f1 DS |
574 | list_delete(ch->sources); |
575 | ||
862756ff DS |
576 | THREAD_OFF(ch->t_ifjoin_expiry_timer); |
577 | THREAD_OFF(ch->t_ifjoin_prune_pending_timer); | |
578 | THREAD_OFF(ch->t_ifassert_timer); | |
579 | ||
ad7b74c4 | 580 | RB_REMOVE(pim_ifchannel_rb, &pim_ifp->ifchannel_rb, ch); |
0885a9f1 DS |
581 | XFREE(MTYPE_PIM_IFCHANNEL, ch); |
582 | return NULL; | |
583 | } | |
9c80de24 | 584 | ch->upstream = up; |
0885a9f1 DS |
585 | |
586 | listnode_add_sort(up->ifchannels, ch); | |
587 | ||
d62a17ae | 588 | ch->ifassert_my_metric = pim_macro_ch_my_assert_metric_eval(ch); |
589 | ch->ifassert_winner_metric = pim_macro_ch_my_assert_metric_eval(ch); | |
590 | ||
591 | ch->ifassert_winner.s_addr = 0; | |
592 | ||
593 | /* Assert state */ | |
594 | ch->t_ifassert_timer = NULL; | |
595 | ch->ifassert_state = PIM_IFASSERT_NOINFO; | |
596 | reset_ifassert_state(ch); | |
597 | if (pim_macro_ch_could_assert_eval(ch)) | |
598 | PIM_IF_FLAG_SET_COULD_ASSERT(ch->flags); | |
599 | else | |
600 | PIM_IF_FLAG_UNSET_COULD_ASSERT(ch->flags); | |
601 | ||
602 | if (pim_macro_assert_tracking_desired_eval(ch)) | |
603 | PIM_IF_FLAG_SET_ASSERT_TRACKING_DESIRED(ch->flags); | |
604 | else | |
605 | PIM_IF_FLAG_UNSET_ASSERT_TRACKING_DESIRED(ch->flags); | |
606 | ||
d62a17ae | 607 | if (PIM_DEBUG_PIM_TRACE) |
608 | zlog_debug("%s: ifchannel %s is created ", __PRETTY_FUNCTION__, | |
609 | ch->sg_str); | |
610 | ||
611 | return ch; | |
12e41d03 DL |
612 | } |
613 | ||
95d3f501 | 614 | static void ifjoin_to_noinfo(struct pim_ifchannel *ch, bool ch_del) |
12e41d03 | 615 | { |
aabb9a2f | 616 | pim_forward_stop(ch, !ch_del); |
d62a17ae | 617 | pim_ifchannel_ifjoin_switch(__PRETTY_FUNCTION__, ch, PIM_IFJOIN_NOINFO); |
618 | if (ch_del) | |
619 | delete_on_noinfo(ch); | |
12e41d03 DL |
620 | } |
621 | ||
622 | static int on_ifjoin_expiry_timer(struct thread *t) | |
623 | { | |
d62a17ae | 624 | struct pim_ifchannel *ch; |
12e41d03 | 625 | |
d62a17ae | 626 | ch = THREAD_ARG(t); |
12e41d03 | 627 | |
d62a17ae | 628 | ifjoin_to_noinfo(ch, true); |
629 | /* ch may have been deleted */ | |
12e41d03 | 630 | |
d62a17ae | 631 | return 0; |
12e41d03 DL |
632 | } |
633 | ||
12e41d03 DL |
634 | static int on_ifjoin_prune_pending_timer(struct thread *t) |
635 | { | |
d62a17ae | 636 | struct pim_ifchannel *ch; |
637 | int send_prune_echo; /* boolean */ | |
638 | struct interface *ifp; | |
639 | struct pim_interface *pim_ifp; | |
640 | ||
641 | ch = THREAD_ARG(t); | |
642 | ||
643 | if (ch->ifjoin_state == PIM_IFJOIN_PRUNE_PENDING) { | |
d62a17ae | 644 | ifp = ch->interface; |
645 | pim_ifp = ifp->info; | |
c206937b DS |
646 | if (!PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) { |
647 | /* Send PruneEcho(S,G) ? */ | |
648 | send_prune_echo = | |
649 | (listcount(pim_ifp->pim_neighbor_list) > 1); | |
650 | ||
651 | if (send_prune_echo) { | |
652 | struct pim_rpf rpf; | |
653 | ||
654 | rpf.source_nexthop.interface = ifp; | |
655 | rpf.rpf_addr.u.prefix4 = | |
656 | pim_ifp->primary_address; | |
657 | pim_jp_agg_single_upstream_send(&rpf, | |
658 | ch->upstream, | |
659 | 0); | |
660 | } | |
d62a17ae | 661 | |
c206937b DS |
662 | ifjoin_to_noinfo(ch, true); |
663 | } else { | |
664 | /* If SGRpt flag is set on ifchannel, Trigger SGRpt | |
665 | * message on RP path upon prune timer expiry. | |
666 | */ | |
667 | ch->ifjoin_state = PIM_IFJOIN_PRUNE; | |
d62a17ae | 668 | if (ch->upstream) |
9b29ea95 DS |
669 | pim_upstream_update_join_desired(pim_ifp->pim, |
670 | ch->upstream); | |
c206937b | 671 | } |
d62a17ae | 672 | /* from here ch may have been deleted */ |
673 | } else { | |
674 | zlog_warn( | |
675 | "%s: IFCHANNEL%s Prune Pending Timer Popped while in %s state", | |
676 | __PRETTY_FUNCTION__, pim_str_sg_dump(&ch->sg), | |
677 | pim_ifchannel_ifjoin_name(ch->ifjoin_state, ch->flags)); | |
678 | } | |
679 | ||
680 | return 0; | |
12e41d03 DL |
681 | } |
682 | ||
d62a17ae | 683 | static void check_recv_upstream(int is_join, struct interface *recv_ifp, |
684 | struct in_addr upstream, struct prefix_sg *sg, | |
685 | uint8_t source_flags, int holdtime) | |
12e41d03 | 686 | { |
d62a17ae | 687 | struct pim_upstream *up; |
9b29ea95 | 688 | struct pim_interface *pim_ifp = recv_ifp->info; |
d62a17ae | 689 | |
690 | /* Upstream (S,G) in Joined state ? */ | |
9b29ea95 | 691 | up = pim_upstream_find(pim_ifp->pim, sg); |
d62a17ae | 692 | if (!up) |
693 | return; | |
694 | if (up->join_state != PIM_UPSTREAM_JOINED) | |
695 | return; | |
696 | ||
697 | /* Upstream (S,G) in Joined state */ | |
698 | ||
699 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { | |
700 | /* RPF'(S,G) not found */ | |
701 | zlog_warn("%s %s: RPF'%s not found", __FILE__, | |
702 | __PRETTY_FUNCTION__, up->sg_str); | |
703 | return; | |
704 | } | |
705 | ||
706 | /* upstream directed to RPF'(S,G) ? */ | |
707 | if (upstream.s_addr != up->rpf.rpf_addr.u.prefix4.s_addr) { | |
708 | char up_str[INET_ADDRSTRLEN]; | |
709 | char rpf_str[PREFIX_STRLEN]; | |
710 | pim_inet4_dump("<up?>", upstream, up_str, sizeof(up_str)); | |
711 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_str, | |
712 | sizeof(rpf_str)); | |
713 | zlog_warn( | |
714 | "%s %s: (S,G)=%s upstream=%s not directed to RPF'(S,G)=%s on interface %s", | |
715 | __FILE__, __PRETTY_FUNCTION__, up->sg_str, up_str, | |
716 | rpf_str, recv_ifp->name); | |
717 | return; | |
718 | } | |
719 | /* upstream directed to RPF'(S,G) */ | |
720 | ||
721 | if (is_join) { | |
722 | /* Join(S,G) to RPF'(S,G) */ | |
723 | pim_upstream_join_suppress(up, up->rpf.rpf_addr.u.prefix4, | |
724 | holdtime); | |
725 | return; | |
726 | } | |
727 | ||
728 | /* Prune to RPF'(S,G) */ | |
729 | ||
730 | if (source_flags & PIM_RPT_BIT_MASK) { | |
731 | if (source_flags & PIM_WILDCARD_BIT_MASK) { | |
732 | /* Prune(*,G) to RPF'(S,G) */ | |
733 | pim_upstream_join_timer_decrease_to_t_override( | |
734 | "Prune(*,G)", up); | |
735 | return; | |
736 | } | |
737 | ||
738 | /* Prune(S,G,rpt) to RPF'(S,G) */ | |
739 | pim_upstream_join_timer_decrease_to_t_override("Prune(S,G,rpt)", | |
740 | up); | |
741 | return; | |
742 | } | |
743 | ||
744 | /* Prune(S,G) to RPF'(S,G) */ | |
745 | pim_upstream_join_timer_decrease_to_t_override("Prune(S,G)", up); | |
12e41d03 DL |
746 | } |
747 | ||
d62a17ae | 748 | static int nonlocal_upstream(int is_join, struct interface *recv_ifp, |
749 | struct in_addr upstream, struct prefix_sg *sg, | |
750 | uint8_t source_flags, uint16_t holdtime) | |
12e41d03 | 751 | { |
d62a17ae | 752 | struct pim_interface *recv_pim_ifp; |
753 | int is_local; /* boolean */ | |
754 | ||
755 | recv_pim_ifp = recv_ifp->info; | |
756 | zassert(recv_pim_ifp); | |
757 | ||
758 | is_local = (upstream.s_addr == recv_pim_ifp->primary_address.s_addr); | |
759 | ||
760 | if (is_local) | |
761 | return 0; | |
762 | ||
763 | if (PIM_DEBUG_PIM_TRACE_DETAIL) { | |
764 | char up_str[INET_ADDRSTRLEN]; | |
765 | pim_inet4_dump("<upstream?>", upstream, up_str, sizeof(up_str)); | |
766 | zlog_warn("%s: recv %s (S,G)=%s to non-local upstream=%s on %s", | |
767 | __PRETTY_FUNCTION__, is_join ? "join" : "prune", | |
768 | pim_str_sg_dump(sg), up_str, recv_ifp->name); | |
769 | } | |
770 | ||
771 | /* | |
772 | * Since recv upstream addr was not directed to our primary | |
773 | * address, check if we should react to it in any way. | |
774 | */ | |
775 | check_recv_upstream(is_join, recv_ifp, upstream, sg, source_flags, | |
776 | holdtime); | |
777 | ||
778 | return 1; /* non-local */ | |
12e41d03 DL |
779 | } |
780 | ||
d62a17ae | 781 | void pim_ifchannel_join_add(struct interface *ifp, struct in_addr neigh_addr, |
782 | struct in_addr upstream, struct prefix_sg *sg, | |
783 | uint8_t source_flags, uint16_t holdtime) | |
12e41d03 | 784 | { |
d62a17ae | 785 | struct pim_interface *pim_ifp; |
786 | struct pim_ifchannel *ch; | |
787 | ||
788 | if (nonlocal_upstream(1 /* join */, ifp, upstream, sg, source_flags, | |
789 | holdtime)) { | |
790 | return; | |
791 | } | |
792 | ||
0885a9f1 DS |
793 | ch = pim_ifchannel_add(ifp, sg, source_flags, |
794 | PIM_UPSTREAM_FLAG_MASK_SRC_PIM); | |
d62a17ae | 795 | if (!ch) |
796 | return; | |
797 | ||
12e41d03 | 798 | /* |
d62a17ae | 799 | RFC 4601: 4.6.1. (S,G) Assert Message State Machine |
800 | ||
801 | Transitions from "I am Assert Loser" State | |
12e41d03 | 802 | |
d62a17ae | 803 | Receive Join(S,G) on Interface I |
12e41d03 | 804 | |
d62a17ae | 805 | We receive a Join(S,G) that has the Upstream Neighbor Address |
806 | field set to my primary IP address on interface I. The action is | |
807 | to transition to NoInfo state, delete this (S,G) assert state | |
808 | (Actions A5 below), and allow the normal PIM Join/Prune mechanisms | |
809 | to operate. | |
12e41d03 | 810 | |
d62a17ae | 811 | Notice: The nonlocal_upstream() test above ensures the upstream |
812 | address of the join message is our primary address. | |
12e41d03 | 813 | */ |
d62a17ae | 814 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { |
815 | char neigh_str[INET_ADDRSTRLEN]; | |
816 | pim_inet4_dump("<neigh?>", neigh_addr, neigh_str, | |
817 | sizeof(neigh_str)); | |
818 | zlog_warn("%s: Assert Loser recv Join%s from %s on %s", | |
819 | __PRETTY_FUNCTION__, ch->sg_str, neigh_str, | |
820 | ifp->name); | |
821 | ||
822 | assert_action_a5(ch); | |
823 | } | |
824 | ||
825 | pim_ifp = ifp->info; | |
826 | zassert(pim_ifp); | |
827 | ||
828 | switch (ch->ifjoin_state) { | |
829 | case PIM_IFJOIN_NOINFO: | |
830 | pim_ifchannel_ifjoin_switch(__PRETTY_FUNCTION__, ch, | |
831 | PIM_IFJOIN_JOIN); | |
832 | if (pim_macro_chisin_oiflist(ch)) { | |
9b29ea95 DS |
833 | pim_upstream_inherited_olist(pim_ifp->pim, |
834 | ch->upstream); | |
d62a17ae | 835 | pim_forward_start(ch); |
836 | } | |
837 | /* | |
838 | * If we are going to be a LHR, we need to note it | |
839 | */ | |
9d303b37 DL |
840 | if (ch->upstream->parent && (ch->upstream->parent->flags |
841 | & PIM_UPSTREAM_FLAG_MASK_SRC_IGMP) | |
d62a17ae | 842 | && !(ch->upstream->flags |
843 | & PIM_UPSTREAM_FLAG_MASK_SRC_LHR)) { | |
844 | pim_upstream_ref(ch->upstream, | |
845 | PIM_UPSTREAM_FLAG_MASK_SRC_LHR, | |
846 | __PRETTY_FUNCTION__); | |
847 | pim_upstream_keep_alive_timer_start( | |
19b807ca | 848 | ch->upstream, pim_ifp->pim->keep_alive_time); |
d62a17ae | 849 | } |
850 | break; | |
851 | case PIM_IFJOIN_JOIN: | |
852 | zassert(!ch->t_ifjoin_prune_pending_timer); | |
853 | ||
854 | /* | |
855 | In the JOIN state ch->t_ifjoin_expiry_timer may be NULL due to | |
856 | a | |
857 | previously received join message with holdtime=0xFFFF. | |
858 | */ | |
859 | if (ch->t_ifjoin_expiry_timer) { | |
860 | unsigned long remain = thread_timer_remain_second( | |
861 | ch->t_ifjoin_expiry_timer); | |
862 | if (remain > holdtime) { | |
863 | /* | |
864 | RFC 4601: 4.5.3. Receiving (S,G) Join/Prune | |
865 | Messages | |
866 | ||
867 | Transitions from Join State | |
868 | ||
869 | The (S,G) downstream state machine on | |
870 | interface I remains in | |
871 | Join state, and the Expiry Timer (ET) is | |
872 | restarted, set to | |
873 | maximum of its current value and the HoldTime | |
874 | from the | |
875 | triggering Join/Prune message. | |
876 | ||
877 | Conclusion: Do not change the ET if the | |
878 | current value is | |
879 | higher than the received join holdtime. | |
880 | */ | |
881 | return; | |
882 | } | |
883 | } | |
884 | THREAD_OFF(ch->t_ifjoin_expiry_timer); | |
885 | break; | |
886 | case PIM_IFJOIN_PRUNE: | |
887 | if (source_flags & PIM_ENCODE_RPT_BIT) | |
888 | pim_ifchannel_ifjoin_switch(__PRETTY_FUNCTION__, ch, | |
889 | PIM_IFJOIN_NOINFO); | |
890 | break; | |
891 | case PIM_IFJOIN_PRUNE_PENDING: | |
892 | THREAD_OFF(ch->t_ifjoin_prune_pending_timer); | |
893 | if (source_flags & PIM_ENCODE_RPT_BIT) { | |
894 | THREAD_OFF(ch->t_ifjoin_expiry_timer); | |
895 | pim_ifchannel_ifjoin_switch(__PRETTY_FUNCTION__, ch, | |
896 | PIM_IFJOIN_NOINFO); | |
897 | } else | |
898 | pim_ifchannel_ifjoin_switch(__PRETTY_FUNCTION__, ch, | |
899 | PIM_IFJOIN_JOIN); | |
900 | break; | |
901 | case PIM_IFJOIN_PRUNE_TMP: | |
902 | break; | |
903 | case PIM_IFJOIN_PRUNE_PENDING_TMP: | |
904 | break; | |
905 | } | |
906 | ||
907 | if (holdtime != 0xFFFF) { | |
908 | thread_add_timer(master, on_ifjoin_expiry_timer, ch, holdtime, | |
909 | &ch->t_ifjoin_expiry_timer); | |
910 | } | |
12e41d03 DL |
911 | } |
912 | ||
d62a17ae | 913 | void pim_ifchannel_prune(struct interface *ifp, struct in_addr upstream, |
914 | struct prefix_sg *sg, uint8_t source_flags, | |
12e41d03 DL |
915 | uint16_t holdtime) |
916 | { | |
d62a17ae | 917 | struct pim_ifchannel *ch; |
918 | struct pim_interface *pim_ifp; | |
919 | int jp_override_interval_msec; | |
1405c852 | 920 | |
d62a17ae | 921 | if (nonlocal_upstream(0 /* prune */, ifp, upstream, sg, source_flags, |
922 | holdtime)) { | |
923 | return; | |
924 | } | |
925 | ||
926 | ch = pim_ifchannel_find(ifp, sg); | |
927 | if (!ch && !(source_flags & PIM_ENCODE_RPT_BIT)) { | |
928 | if (PIM_DEBUG_TRACE) | |
929 | zlog_debug( | |
930 | "%s: Received prune with no relevant ifchannel %s(%s) state: %d", | |
931 | __PRETTY_FUNCTION__, ifp->name, | |
932 | pim_str_sg_dump(sg), source_flags); | |
933 | return; | |
934 | } | |
935 | ||
0885a9f1 DS |
936 | ch = pim_ifchannel_add(ifp, sg, source_flags, |
937 | PIM_UPSTREAM_FLAG_MASK_SRC_PIM); | |
d62a17ae | 938 | if (!ch) |
939 | return; | |
940 | ||
941 | pim_ifp = ifp->info; | |
942 | ||
943 | switch (ch->ifjoin_state) { | |
944 | case PIM_IFJOIN_NOINFO: | |
945 | if (source_flags & PIM_ENCODE_RPT_BIT) { | |
946 | if (!(source_flags & PIM_ENCODE_WC_BIT)) | |
947 | PIM_IF_FLAG_SET_S_G_RPT(ch->flags); | |
948 | ||
949 | ch->ifjoin_state = PIM_IFJOIN_PRUNE_PENDING; | |
950 | if (listcount(pim_ifp->pim_neighbor_list) > 1) | |
951 | jp_override_interval_msec = | |
952 | pim_if_jp_override_interval_msec(ifp); | |
953 | else | |
954 | jp_override_interval_msec = | |
955 | 0; /* schedule to expire immediately */ | |
956 | /* If we called ifjoin_prune() directly instead, care | |
957 | should | |
958 | be taken not to use "ch" afterwards since it would be | |
959 | deleted. */ | |
960 | ||
961 | THREAD_OFF(ch->t_ifjoin_prune_pending_timer); | |
962 | THREAD_OFF(ch->t_ifjoin_expiry_timer); | |
963 | thread_add_timer_msec( | |
964 | master, on_ifjoin_prune_pending_timer, ch, | |
965 | jp_override_interval_msec, | |
966 | &ch->t_ifjoin_prune_pending_timer); | |
967 | thread_add_timer(master, on_ifjoin_expiry_timer, ch, | |
968 | holdtime, &ch->t_ifjoin_expiry_timer); | |
9b29ea95 DS |
969 | pim_upstream_update_join_desired(pim_ifp->pim, |
970 | ch->upstream); | |
d62a17ae | 971 | } |
972 | break; | |
973 | case PIM_IFJOIN_PRUNE_PENDING: | |
974 | /* nothing to do */ | |
975 | break; | |
976 | case PIM_IFJOIN_JOIN: | |
977 | THREAD_OFF(ch->t_ifjoin_expiry_timer); | |
978 | ||
979 | pim_ifchannel_ifjoin_switch(__PRETTY_FUNCTION__, ch, | |
980 | PIM_IFJOIN_PRUNE_PENDING); | |
981 | ||
982 | if (listcount(pim_ifp->pim_neighbor_list) > 1) | |
983 | jp_override_interval_msec = | |
984 | pim_if_jp_override_interval_msec(ifp); | |
985 | else | |
986 | jp_override_interval_msec = | |
987 | 0; /* schedule to expire immediately */ | |
988 | /* If we called ifjoin_prune() directly instead, care should | |
989 | be taken not to use "ch" afterwards since it would be | |
990 | deleted. */ | |
991 | THREAD_OFF(ch->t_ifjoin_prune_pending_timer); | |
992 | thread_add_timer_msec(master, on_ifjoin_prune_pending_timer, ch, | |
993 | jp_override_interval_msec, | |
994 | &ch->t_ifjoin_prune_pending_timer); | |
995 | break; | |
996 | case PIM_IFJOIN_PRUNE: | |
997 | if (source_flags & PIM_ENCODE_RPT_BIT) { | |
998 | THREAD_OFF(ch->t_ifjoin_prune_pending_timer); | |
999 | thread_add_timer(master, on_ifjoin_expiry_timer, ch, | |
1000 | holdtime, &ch->t_ifjoin_expiry_timer); | |
1001 | } | |
1002 | break; | |
1003 | case PIM_IFJOIN_PRUNE_TMP: | |
1004 | if (source_flags & PIM_ENCODE_RPT_BIT) { | |
1005 | ch->ifjoin_state = PIM_IFJOIN_PRUNE; | |
1006 | THREAD_OFF(ch->t_ifjoin_expiry_timer); | |
1007 | thread_add_timer(master, on_ifjoin_expiry_timer, ch, | |
1008 | holdtime, &ch->t_ifjoin_expiry_timer); | |
1009 | } | |
1010 | break; | |
1011 | case PIM_IFJOIN_PRUNE_PENDING_TMP: | |
1012 | if (source_flags & PIM_ENCODE_RPT_BIT) { | |
1013 | ch->ifjoin_state = PIM_IFJOIN_PRUNE_PENDING; | |
1014 | THREAD_OFF(ch->t_ifjoin_expiry_timer); | |
1015 | thread_add_timer(master, on_ifjoin_expiry_timer, ch, | |
1016 | holdtime, &ch->t_ifjoin_expiry_timer); | |
1017 | } | |
1018 | break; | |
1019 | } | |
12e41d03 DL |
1020 | } |
1021 | ||
d62a17ae | 1022 | int pim_ifchannel_local_membership_add(struct interface *ifp, |
1023 | struct prefix_sg *sg) | |
12e41d03 | 1024 | { |
d62a17ae | 1025 | struct pim_ifchannel *ch, *starch; |
1026 | struct pim_interface *pim_ifp; | |
43e40fdf | 1027 | struct pim_instance *pim; |
d62a17ae | 1028 | |
1029 | /* PIM enabled on interface? */ | |
1030 | pim_ifp = ifp->info; | |
1031 | if (!pim_ifp) | |
1032 | return 0; | |
1033 | if (!PIM_IF_TEST_PIM(pim_ifp->options)) | |
1034 | return 0; | |
1035 | ||
43e40fdf DS |
1036 | pim = pim_ifp->pim; |
1037 | ||
d62a17ae | 1038 | /* skip (*,G) ch creation if G is of type SSM */ |
1039 | if (sg->src.s_addr == INADDR_ANY) { | |
6f439a70 | 1040 | if (pim_is_grp_ssm(pim, sg->grp)) { |
d62a17ae | 1041 | if (PIM_DEBUG_PIM_EVENTS) |
1042 | zlog_debug( | |
1043 | "%s: local membership (S,G)=%s ignored as group is SSM", | |
1044 | __PRETTY_FUNCTION__, | |
1045 | pim_str_sg_dump(sg)); | |
1046 | return 1; | |
1047 | } | |
1048 | } | |
1049 | ||
0885a9f1 | 1050 | ch = pim_ifchannel_add(ifp, sg, 0, PIM_UPSTREAM_FLAG_MASK_SRC_IGMP); |
d62a17ae | 1051 | if (!ch) { |
1052 | return 0; | |
1053 | } | |
1054 | ||
1055 | ifmembership_set(ch, PIM_IFMEMBERSHIP_INCLUDE); | |
1056 | ||
1057 | if (sg->src.s_addr == INADDR_ANY) { | |
9b29ea95 | 1058 | struct pim_upstream *up = pim_upstream_find(pim, sg); |
d62a17ae | 1059 | struct pim_upstream *child; |
1060 | struct listnode *up_node; | |
1061 | ||
1062 | starch = ch; | |
1063 | ||
1064 | for (ALL_LIST_ELEMENTS_RO(up->sources, up_node, child)) { | |
1065 | if (PIM_DEBUG_EVENTS) | |
1066 | zlog_debug("%s %s: IGMP (S,G)=%s(%s) from %s", | |
1067 | __FILE__, __PRETTY_FUNCTION__, | |
1068 | child->sg_str, ifp->name, | |
1069 | up->sg_str); | |
1070 | ||
1071 | ch = pim_ifchannel_find(ifp, &child->sg); | |
1072 | if (pim_upstream_evaluate_join_desired_interface( | |
1073 | child, ch, starch)) { | |
1074 | pim_channel_add_oif(child->channel_oil, ifp, | |
1075 | PIM_OIF_FLAG_PROTO_STAR); | |
1eca8576 DS |
1076 | pim_upstream_switch(pim, child, |
1077 | PIM_UPSTREAM_JOINED); | |
d62a17ae | 1078 | } |
1079 | } | |
1080 | ||
43e40fdf | 1081 | if (pim->spt.switchover == PIM_SPT_INFINITY) { |
f88df3a6 | 1082 | if (pim->spt.plist) { |
d62a17ae | 1083 | struct prefix_list *plist = prefix_list_lookup( |
43e40fdf | 1084 | AFI_IP, pim->spt.plist); |
d62a17ae | 1085 | struct prefix g; |
1086 | g.family = AF_INET; | |
1087 | g.prefixlen = IPV4_MAX_PREFIXLEN; | |
1088 | g.u.prefix4 = up->sg.grp; | |
1089 | ||
1090 | if (prefix_list_apply(plist, &g) | |
1091 | == PREFIX_DENY) { | |
1092 | pim_channel_add_oif( | |
43e40fdf | 1093 | up->channel_oil, pim->regiface, |
d62a17ae | 1094 | PIM_OIF_FLAG_PROTO_IGMP); |
1095 | } | |
1096 | } | |
1097 | } else | |
43e40fdf | 1098 | pim_channel_add_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1099 | PIM_OIF_FLAG_PROTO_IGMP); |
1100 | } | |
1101 | ||
1102 | return 1; | |
12e41d03 DL |
1103 | } |
1104 | ||
1105 | void pim_ifchannel_local_membership_del(struct interface *ifp, | |
4ed0af70 | 1106 | struct prefix_sg *sg) |
12e41d03 | 1107 | { |
d62a17ae | 1108 | struct pim_ifchannel *starch, *ch, *orig; |
1109 | struct pim_interface *pim_ifp; | |
1110 | ||
1111 | /* PIM enabled on interface? */ | |
1112 | pim_ifp = ifp->info; | |
1113 | if (!pim_ifp) | |
1114 | return; | |
1115 | if (!PIM_IF_TEST_PIM(pim_ifp->options)) | |
1116 | return; | |
1117 | ||
1118 | orig = ch = pim_ifchannel_find(ifp, sg); | |
1119 | if (!ch) | |
1120 | return; | |
d62a17ae | 1121 | ifmembership_set(ch, PIM_IFMEMBERSHIP_NOINFO); |
1122 | ||
1123 | if (sg->src.s_addr == INADDR_ANY) { | |
9b29ea95 | 1124 | struct pim_upstream *up = pim_upstream_find(pim_ifp->pim, sg); |
d62a17ae | 1125 | struct pim_upstream *child; |
1126 | struct listnode *up_node, *up_nnode; | |
1127 | ||
1128 | starch = ch; | |
1129 | ||
1130 | for (ALL_LIST_ELEMENTS(up->sources, up_node, up_nnode, child)) { | |
1131 | struct channel_oil *c_oil = child->channel_oil; | |
1132 | struct pim_ifchannel *chchannel = | |
1133 | pim_ifchannel_find(ifp, &child->sg); | |
1134 | struct pim_interface *pim_ifp = ifp->info; | |
1135 | ||
1136 | if (PIM_DEBUG_EVENTS) | |
1137 | zlog_debug("%s %s: Prune(S,G)=%s(%s) from %s", | |
1138 | __FILE__, __PRETTY_FUNCTION__, | |
1139 | up->sg_str, ifp->name, | |
1140 | child->sg_str); | |
1141 | ||
1142 | ch = pim_ifchannel_find(ifp, &child->sg); | |
1143 | if (c_oil | |
1144 | && !pim_upstream_evaluate_join_desired_interface( | |
1145 | child, ch, starch)) | |
1146 | pim_channel_del_oif(c_oil, ifp, | |
1147 | PIM_OIF_FLAG_PROTO_STAR); | |
1148 | ||
1149 | /* | |
1150 | * If the S,G has no if channel and the c_oil still | |
1151 | * has output here then the *,G was supplying the | |
1152 | * implied | |
1153 | * if channel. So remove it. | |
1154 | */ | |
1155 | if (!chchannel && c_oil | |
1156 | && c_oil->oil.mfcc_ttls[pim_ifp->mroute_vif_index]) | |
1157 | pim_channel_del_oif(c_oil, ifp, | |
1158 | PIM_OIF_FLAG_PROTO_STAR); | |
1159 | ||
1160 | /* Child node removal/ref count-- will happen as part of | |
1161 | * parent' delete_no_info */ | |
1162 | } | |
1163 | } | |
1164 | delete_on_noinfo(orig); | |
12e41d03 DL |
1165 | } |
1166 | ||
1167 | void pim_ifchannel_update_could_assert(struct pim_ifchannel *ch) | |
1168 | { | |
d62a17ae | 1169 | int old_couldassert = |
1170 | PIM_FORCE_BOOLEAN(PIM_IF_FLAG_TEST_COULD_ASSERT(ch->flags)); | |
1171 | int new_couldassert = | |
1172 | PIM_FORCE_BOOLEAN(pim_macro_ch_could_assert_eval(ch)); | |
1173 | ||
1174 | if (new_couldassert == old_couldassert) | |
1175 | return; | |
1176 | ||
1177 | if (PIM_DEBUG_PIM_EVENTS) { | |
1178 | char src_str[INET_ADDRSTRLEN]; | |
1179 | char grp_str[INET_ADDRSTRLEN]; | |
1180 | pim_inet4_dump("<src?>", ch->sg.src, src_str, sizeof(src_str)); | |
1181 | pim_inet4_dump("<grp?>", ch->sg.grp, grp_str, sizeof(grp_str)); | |
1182 | zlog_debug("%s: CouldAssert(%s,%s,%s) changed from %d to %d", | |
1183 | __PRETTY_FUNCTION__, src_str, grp_str, | |
1184 | ch->interface->name, old_couldassert, | |
1185 | new_couldassert); | |
1186 | } | |
1187 | ||
1188 | if (new_couldassert) { | |
1189 | /* CouldAssert(S,G,I) switched from FALSE to TRUE */ | |
1190 | PIM_IF_FLAG_SET_COULD_ASSERT(ch->flags); | |
1191 | } else { | |
1192 | /* CouldAssert(S,G,I) switched from TRUE to FALSE */ | |
1193 | PIM_IF_FLAG_UNSET_COULD_ASSERT(ch->flags); | |
1194 | ||
1195 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_WINNER) { | |
1196 | assert_action_a4(ch); | |
1197 | } | |
1198 | } | |
1199 | ||
1200 | pim_ifchannel_update_my_assert_metric(ch); | |
12e41d03 DL |
1201 | } |
1202 | ||
1203 | /* | |
1204 | my_assert_metric may be affected by: | |
1205 | ||
1206 | CouldAssert(S,G) | |
1207 | pim_ifp->primary_address | |
1208 | rpf->source_nexthop.mrib_metric_preference; | |
1209 | rpf->source_nexthop.mrib_route_metric; | |
1210 | */ | |
1211 | void pim_ifchannel_update_my_assert_metric(struct pim_ifchannel *ch) | |
1212 | { | |
d62a17ae | 1213 | struct pim_assert_metric my_metric_new = |
1214 | pim_macro_ch_my_assert_metric_eval(ch); | |
1215 | ||
1216 | if (pim_assert_metric_match(&my_metric_new, &ch->ifassert_my_metric)) | |
1217 | return; | |
1218 | ||
1219 | if (PIM_DEBUG_PIM_EVENTS) { | |
1220 | char src_str[INET_ADDRSTRLEN]; | |
1221 | char grp_str[INET_ADDRSTRLEN]; | |
1222 | char old_addr_str[INET_ADDRSTRLEN]; | |
1223 | char new_addr_str[INET_ADDRSTRLEN]; | |
1224 | pim_inet4_dump("<src?>", ch->sg.src, src_str, sizeof(src_str)); | |
1225 | pim_inet4_dump("<grp?>", ch->sg.grp, grp_str, sizeof(grp_str)); | |
1226 | pim_inet4_dump("<old_addr?>", ch->ifassert_my_metric.ip_address, | |
1227 | old_addr_str, sizeof(old_addr_str)); | |
1228 | pim_inet4_dump("<new_addr?>", my_metric_new.ip_address, | |
1229 | new_addr_str, sizeof(new_addr_str)); | |
1230 | zlog_debug( | |
1231 | "%s: my_assert_metric(%s,%s,%s) changed from %u,%u,%u,%s to %u,%u,%u,%s", | |
1232 | __PRETTY_FUNCTION__, src_str, grp_str, | |
1233 | ch->interface->name, | |
1234 | ch->ifassert_my_metric.rpt_bit_flag, | |
1235 | ch->ifassert_my_metric.metric_preference, | |
1236 | ch->ifassert_my_metric.route_metric, old_addr_str, | |
1237 | my_metric_new.rpt_bit_flag, | |
1238 | my_metric_new.metric_preference, | |
1239 | my_metric_new.route_metric, new_addr_str); | |
1240 | } | |
1241 | ||
1242 | ch->ifassert_my_metric = my_metric_new; | |
1243 | ||
1244 | if (pim_assert_metric_better(&ch->ifassert_my_metric, | |
1245 | &ch->ifassert_winner_metric)) { | |
1246 | assert_action_a5(ch); | |
1247 | } | |
12e41d03 DL |
1248 | } |
1249 | ||
1250 | void pim_ifchannel_update_assert_tracking_desired(struct pim_ifchannel *ch) | |
1251 | { | |
d62a17ae | 1252 | int old_atd = PIM_FORCE_BOOLEAN( |
1253 | PIM_IF_FLAG_TEST_ASSERT_TRACKING_DESIRED(ch->flags)); | |
1254 | int new_atd = | |
1255 | PIM_FORCE_BOOLEAN(pim_macro_assert_tracking_desired_eval(ch)); | |
1256 | ||
1257 | if (new_atd == old_atd) | |
1258 | return; | |
1259 | ||
1260 | if (PIM_DEBUG_PIM_EVENTS) { | |
1261 | char src_str[INET_ADDRSTRLEN]; | |
1262 | char grp_str[INET_ADDRSTRLEN]; | |
1263 | pim_inet4_dump("<src?>", ch->sg.src, src_str, sizeof(src_str)); | |
1264 | pim_inet4_dump("<grp?>", ch->sg.grp, grp_str, sizeof(grp_str)); | |
1265 | zlog_debug( | |
1266 | "%s: AssertTrackingDesired(%s,%s,%s) changed from %d to %d", | |
1267 | __PRETTY_FUNCTION__, src_str, grp_str, | |
1268 | ch->interface->name, old_atd, new_atd); | |
1269 | } | |
1270 | ||
1271 | if (new_atd) { | |
1272 | /* AssertTrackingDesired(S,G,I) switched from FALSE to TRUE */ | |
1273 | PIM_IF_FLAG_SET_ASSERT_TRACKING_DESIRED(ch->flags); | |
1274 | } else { | |
1275 | /* AssertTrackingDesired(S,G,I) switched from TRUE to FALSE */ | |
1276 | PIM_IF_FLAG_UNSET_ASSERT_TRACKING_DESIRED(ch->flags); | |
1277 | ||
1278 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { | |
1279 | assert_action_a5(ch); | |
1280 | } | |
1281 | } | |
12e41d03 | 1282 | } |
c8507a16 DS |
1283 | |
1284 | /* | |
1285 | * If we have a new pim interface, check to | |
1286 | * see if any of the pre-existing channels have | |
1287 | * their upstream out that way and turn on forwarding | |
1288 | * for that ifchannel then. | |
1289 | */ | |
d62a17ae | 1290 | void pim_ifchannel_scan_forward_start(struct interface *new_ifp) |
c8507a16 | 1291 | { |
d62a17ae | 1292 | struct pim_interface *new_pim_ifp = new_ifp->info; |
f88df3a6 | 1293 | struct pim_instance *pim = new_pim_ifp->pim; |
ad7b74c4 DS |
1294 | struct listnode *ifnode; |
1295 | struct interface *ifp; | |
d62a17ae | 1296 | |
f88df3a6 | 1297 | for (ALL_LIST_ELEMENTS_RO(vrf_iflist(pim->vrf_id), ifnode, ifp)) { |
d62a17ae | 1298 | struct pim_interface *loop_pim_ifp = ifp->info; |
d62a17ae | 1299 | struct pim_ifchannel *ch; |
1300 | ||
1301 | if (!loop_pim_ifp) | |
1302 | continue; | |
1303 | ||
1304 | if (new_pim_ifp == loop_pim_ifp) | |
1305 | continue; | |
1306 | ||
a2addae8 | 1307 | RB_FOREACH (ch, pim_ifchannel_rb, &loop_pim_ifp->ifchannel_rb) { |
d62a17ae | 1308 | if (ch->ifjoin_state == PIM_IFJOIN_JOIN) { |
1309 | struct pim_upstream *up = ch->upstream; | |
1310 | if ((!up->channel_oil) | |
1311 | && (up->rpf.source_nexthop | |
1312 | .interface == new_ifp)) | |
1313 | pim_forward_start(ch); | |
1314 | } | |
1315 | } | |
1316 | } | |
c8507a16 | 1317 | } |
220d8a49 DS |
1318 | |
1319 | /* | |
1320 | * Downstream per-interface (S,G,rpt) state machine | |
1321 | * states that we need to move (S,G,rpt) items | |
1322 | * into different states at the start of the | |
1323 | * reception of a *,G join as well, when | |
1324 | * we get End of Message | |
1325 | */ | |
d62a17ae | 1326 | void pim_ifchannel_set_star_g_join_state(struct pim_ifchannel *ch, int eom, |
c206937b | 1327 | uint8_t join) |
220d8a49 | 1328 | { |
d62a17ae | 1329 | struct pim_ifchannel *child; |
37736d08 | 1330 | struct listnode *ch_node, *nch_node; |
c206937b DS |
1331 | struct pim_instance *pim = |
1332 | ((struct pim_interface *)ch->interface->info)->pim; | |
d62a17ae | 1333 | |
1334 | if (PIM_DEBUG_PIM_TRACE) | |
1335 | zlog_debug( | |
1336 | "%s: %s %s eom: %d join %u", __PRETTY_FUNCTION__, | |
1337 | pim_ifchannel_ifjoin_name(ch->ifjoin_state, ch->flags), | |
1338 | ch->sg_str, eom, join); | |
1339 | if (!ch->sources) | |
1340 | return; | |
1341 | ||
37736d08 | 1342 | for (ALL_LIST_ELEMENTS(ch->sources, ch_node, nch_node, child)) { |
d62a17ae | 1343 | if (!PIM_IF_FLAG_TEST_S_G_RPT(child->flags)) |
1344 | continue; | |
1345 | ||
1346 | switch (child->ifjoin_state) { | |
1347 | case PIM_IFJOIN_NOINFO: | |
1348 | case PIM_IFJOIN_JOIN: | |
1349 | break; | |
1350 | case PIM_IFJOIN_PRUNE: | |
1351 | if (!eom) | |
1352 | child->ifjoin_state = PIM_IFJOIN_PRUNE_TMP; | |
1353 | break; | |
1354 | case PIM_IFJOIN_PRUNE_PENDING: | |
1355 | if (!eom) | |
1356 | child->ifjoin_state = | |
1357 | PIM_IFJOIN_PRUNE_PENDING_TMP; | |
1358 | break; | |
1359 | case PIM_IFJOIN_PRUNE_TMP: | |
1360 | case PIM_IFJOIN_PRUNE_PENDING_TMP: | |
37736d08 DS |
1361 | if (!eom) |
1362 | break; | |
1363 | ||
1364 | if (child->ifjoin_state == PIM_IFJOIN_PRUNE_PENDING_TMP) | |
1365 | THREAD_OFF(child->t_ifjoin_prune_pending_timer); | |
1366 | THREAD_OFF(child->t_ifjoin_expiry_timer); | |
1367 | struct pim_upstream *parent = | |
1368 | child->upstream->parent; | |
1369 | ||
1370 | PIM_IF_FLAG_UNSET_S_G_RPT(child->flags); | |
1371 | child->ifjoin_state = PIM_IFJOIN_NOINFO; | |
1372 | ||
1373 | if (I_am_RP(pim, child->sg.grp)) { | |
1374 | pim_channel_add_oif( | |
1375 | child->upstream->channel_oil, | |
1376 | ch->interface, | |
1377 | PIM_OIF_FLAG_PROTO_STAR); | |
1378 | pim_upstream_switch( | |
1379 | pim, child->upstream, | |
1380 | PIM_UPSTREAM_JOINED); | |
1381 | pim_jp_agg_single_upstream_send( | |
1382 | &child->upstream->rpf, | |
1383 | child->upstream, true); | |
c206937b | 1384 | } |
37736d08 DS |
1385 | if (parent) |
1386 | pim_jp_agg_single_upstream_send( | |
1387 | &parent->rpf, | |
1388 | parent, true); | |
1389 | ||
1390 | delete_on_noinfo(child); | |
d62a17ae | 1391 | break; |
1392 | } | |
1405c852 | 1393 | } |
220d8a49 | 1394 | } |
a625e937 | 1395 | |
d62a17ae | 1396 | unsigned int pim_ifchannel_hash_key(void *arg) |
a625e937 | 1397 | { |
d62a17ae | 1398 | struct pim_ifchannel *ch = (struct pim_ifchannel *)arg; |
a625e937 | 1399 | |
d62a17ae | 1400 | return jhash_2words(ch->sg.src.s_addr, ch->sg.grp.s_addr, 0); |
a625e937 | 1401 | } |