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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) | |
affe9e99 | 172 | list_delete_and_null(&ch->sources); |
d62a17ae | 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 | ||
55cd0f61 DS |
214 | while (!RB_EMPTY(pim_ifchannel_rb, &pim_ifp->ifchannel_rb)) { |
215 | ch = RB_ROOT(pim_ifchannel_rb, &pim_ifp->ifchannel_rb); | |
216 | ||
ad7b74c4 | 217 | pim_ifchannel_delete(ch); |
d62a17ae | 218 | } |
cb24fec4 | 219 | } |
d62a17ae | 220 | |
12e41d03 DL |
221 | static void delete_on_noinfo(struct pim_ifchannel *ch) |
222 | { | |
d62a17ae | 223 | if (ch->local_ifmembership == PIM_IFMEMBERSHIP_NOINFO |
224 | && ch->ifjoin_state == PIM_IFJOIN_NOINFO | |
225 | && ch->t_ifjoin_expiry_timer == NULL) | |
226 | pim_ifchannel_delete(ch); | |
12e41d03 DL |
227 | } |
228 | ||
d62a17ae | 229 | void pim_ifchannel_ifjoin_switch(const char *caller, struct pim_ifchannel *ch, |
12e41d03 DL |
230 | enum pim_ifjoin_state new_state) |
231 | { | |
d62a17ae | 232 | enum pim_ifjoin_state old_state = ch->ifjoin_state; |
9b29ea95 | 233 | struct pim_interface *pim_ifp = ch->interface->info; |
d62a17ae | 234 | |
235 | if (PIM_DEBUG_PIM_EVENTS) | |
236 | zlog_debug( | |
237 | "PIM_IFCHANNEL(%s): %s is switching from %s to %s", | |
238 | ch->interface->name, ch->sg_str, | |
239 | pim_ifchannel_ifjoin_name(ch->ifjoin_state, ch->flags), | |
240 | pim_ifchannel_ifjoin_name(new_state, 0)); | |
241 | ||
242 | ||
243 | if (old_state == new_state) { | |
244 | if (PIM_DEBUG_PIM_EVENTS) { | |
245 | zlog_debug( | |
246 | "%s calledby %s: non-transition on state %d (%s)", | |
247 | __PRETTY_FUNCTION__, caller, new_state, | |
248 | pim_ifchannel_ifjoin_name(new_state, 0)); | |
6578dfa3 | 249 | } |
d62a17ae | 250 | return; |
251 | } | |
252 | ||
253 | ch->ifjoin_state = new_state; | |
254 | ||
255 | if (ch->sg.src.s_addr == INADDR_ANY) { | |
256 | struct pim_upstream *up = ch->upstream; | |
257 | struct pim_upstream *child; | |
258 | struct listnode *up_node; | |
259 | ||
260 | if (up) { | |
261 | if (ch->ifjoin_state == PIM_IFJOIN_NOINFO) { | |
262 | for (ALL_LIST_ELEMENTS_RO(up->sources, up_node, | |
263 | child)) { | |
264 | struct channel_oil *c_oil = | |
265 | child->channel_oil; | |
d62a17ae | 266 | |
267 | if (PIM_DEBUG_PIM_TRACE) | |
268 | zlog_debug( | |
269 | "%s %s: Prune(S,G)=%s from %s", | |
270 | __FILE__, | |
271 | __PRETTY_FUNCTION__, | |
272 | child->sg_str, | |
273 | up->sg_str); | |
274 | if (!c_oil) | |
275 | continue; | |
276 | ||
277 | if (!pim_upstream_evaluate_join_desired( | |
9b29ea95 | 278 | pim_ifp->pim, child)) { |
d62a17ae | 279 | pim_channel_del_oif( |
280 | c_oil, ch->interface, | |
281 | PIM_OIF_FLAG_PROTO_STAR); | |
282 | pim_upstream_update_join_desired( | |
9b29ea95 | 283 | pim_ifp->pim, child); |
d62a17ae | 284 | } |
285 | ||
286 | /* | |
287 | * If the S,G has no if channel and the | |
288 | * c_oil still | |
289 | * has output here then the *,G was | |
290 | * supplying the implied | |
291 | * if channel. So remove it. | |
292 | * I think this is dead code now. is it? | |
293 | */ | |
a88e628d DS |
294 | if (c_oil->oil.mfcc_ttls |
295 | [pim_ifp->mroute_vif_index]) | |
d62a17ae | 296 | pim_channel_del_oif( |
297 | c_oil, ch->interface, | |
298 | PIM_OIF_FLAG_PROTO_STAR); | |
299 | } | |
300 | } | |
301 | if (ch->ifjoin_state == PIM_IFJOIN_JOIN) { | |
302 | for (ALL_LIST_ELEMENTS_RO(up->sources, up_node, | |
303 | child)) { | |
304 | if (PIM_DEBUG_PIM_TRACE) | |
305 | zlog_debug( | |
306 | "%s %s: Join(S,G)=%s from %s", | |
307 | __FILE__, | |
308 | __PRETTY_FUNCTION__, | |
309 | child->sg_str, | |
310 | up->sg_str); | |
311 | ||
312 | if (pim_upstream_evaluate_join_desired( | |
9b29ea95 | 313 | pim_ifp->pim, child)) { |
d62a17ae | 314 | pim_channel_add_oif( |
315 | child->channel_oil, | |
316 | ch->interface, | |
317 | PIM_OIF_FLAG_PROTO_STAR); | |
318 | pim_upstream_update_join_desired( | |
9b29ea95 | 319 | pim_ifp->pim, child); |
d62a17ae | 320 | } |
321 | } | |
322 | } | |
6578dfa3 | 323 | } |
6578dfa3 | 324 | } |
d62a17ae | 325 | /* Transition to/from NOINFO ? */ |
326 | if ((old_state == PIM_IFJOIN_NOINFO) | |
327 | || (new_state == PIM_IFJOIN_NOINFO)) { | |
328 | ||
329 | if (PIM_DEBUG_PIM_EVENTS) { | |
330 | zlog_debug("PIM_IFCHANNEL_%s: (S,G)=%s on interface %s", | |
331 | ((new_state == PIM_IFJOIN_NOINFO) ? "DOWN" | |
332 | : "UP"), | |
333 | ch->sg_str, ch->interface->name); | |
334 | } | |
335 | ||
336 | /* | |
337 | Record uptime of state transition to/from NOINFO | |
338 | */ | |
339 | ch->ifjoin_creation = pim_time_monotonic_sec(); | |
340 | ||
9b29ea95 | 341 | pim_upstream_update_join_desired(pim_ifp->pim, ch->upstream); |
d62a17ae | 342 | pim_ifchannel_update_could_assert(ch); |
343 | pim_ifchannel_update_assert_tracking_desired(ch); | |
344 | } | |
12e41d03 DL |
345 | } |
346 | ||
d1e77284 | 347 | const char *pim_ifchannel_ifjoin_name(enum pim_ifjoin_state ifjoin_state, |
d62a17ae | 348 | int flags) |
12e41d03 | 349 | { |
d62a17ae | 350 | switch (ifjoin_state) { |
351 | case PIM_IFJOIN_NOINFO: | |
352 | if (PIM_IF_FLAG_TEST_S_G_RPT(flags)) | |
c206937b | 353 | return "SGRpt(NI)"; |
d62a17ae | 354 | else |
355 | return "NOINFO"; | |
356 | break; | |
357 | case PIM_IFJOIN_JOIN: | |
358 | return "JOIN"; | |
359 | break; | |
360 | case PIM_IFJOIN_PRUNE: | |
c206937b DS |
361 | if (PIM_IF_FLAG_TEST_S_G_RPT(flags)) |
362 | return "SGRpt(P)"; | |
363 | else | |
364 | return "PRUNE"; | |
d62a17ae | 365 | break; |
366 | case PIM_IFJOIN_PRUNE_PENDING: | |
c206937b DS |
367 | if (PIM_IF_FLAG_TEST_S_G_RPT(flags)) |
368 | return "SGRpt(PP)"; | |
369 | else | |
370 | return "PRUNEP"; | |
d62a17ae | 371 | break; |
372 | case PIM_IFJOIN_PRUNE_TMP: | |
c206937b DS |
373 | if (PIM_IF_FLAG_TEST_S_G_RPT(flags)) |
374 | return "SGRpt(P')"; | |
375 | else | |
376 | return "PRUNET"; | |
d62a17ae | 377 | break; |
378 | case PIM_IFJOIN_PRUNE_PENDING_TMP: | |
c206937b DS |
379 | if (PIM_IF_FLAG_TEST_S_G_RPT(flags)) |
380 | return "SGRpt(PP')"; | |
381 | else | |
382 | return "PRUNEPT"; | |
d62a17ae | 383 | break; |
384 | } | |
385 | ||
386 | return "ifjoin_bad_state"; | |
12e41d03 DL |
387 | } |
388 | ||
389 | const char *pim_ifchannel_ifassert_name(enum pim_ifassert_state ifassert_state) | |
390 | { | |
d62a17ae | 391 | switch (ifassert_state) { |
392 | case PIM_IFASSERT_NOINFO: | |
393 | return "NOINFO"; | |
394 | case PIM_IFASSERT_I_AM_WINNER: | |
395 | return "WINNER"; | |
396 | case PIM_IFASSERT_I_AM_LOSER: | |
397 | return "LOSER"; | |
398 | } | |
12e41d03 | 399 | |
d62a17ae | 400 | return "ifassert_bad_state"; |
12e41d03 DL |
401 | } |
402 | ||
403 | /* | |
404 | RFC 4601: 4.6.5. Assert State Macros | |
405 | ||
406 | AssertWinner(S,G,I) defaults to NULL and AssertWinnerMetric(S,G,I) | |
407 | defaults to Infinity when in the NoInfo state. | |
408 | */ | |
409 | void reset_ifassert_state(struct pim_ifchannel *ch) | |
410 | { | |
d62a17ae | 411 | struct in_addr any = {.s_addr = INADDR_ANY}; |
7656e7fc | 412 | |
d62a17ae | 413 | THREAD_OFF(ch->t_ifassert_timer); |
12e41d03 | 414 | |
d62a17ae | 415 | pim_ifassert_winner_set(ch, PIM_IFASSERT_NOINFO, any, |
416 | qpim_infinite_assert_metric); | |
12e41d03 DL |
417 | } |
418 | ||
12e41d03 | 419 | struct pim_ifchannel *pim_ifchannel_find(struct interface *ifp, |
4ed0af70 | 420 | struct prefix_sg *sg) |
12e41d03 | 421 | { |
d62a17ae | 422 | struct pim_interface *pim_ifp; |
423 | struct pim_ifchannel *ch; | |
424 | struct pim_ifchannel lookup; | |
12e41d03 | 425 | |
d62a17ae | 426 | pim_ifp = ifp->info; |
12e41d03 | 427 | |
d62a17ae | 428 | if (!pim_ifp) { |
429 | zlog_warn("%s: (S,G)=%s: multicast not enabled on interface %s", | |
430 | __PRETTY_FUNCTION__, pim_str_sg_dump(sg), ifp->name); | |
431 | return NULL; | |
432 | } | |
12e41d03 | 433 | |
d62a17ae | 434 | lookup.sg = *sg; |
ad7b74c4 DS |
435 | lookup.interface = ifp; |
436 | ch = RB_FIND(pim_ifchannel_rb, &pim_ifp->ifchannel_rb, &lookup); | |
12e41d03 | 437 | |
d62a17ae | 438 | return ch; |
12e41d03 DL |
439 | } |
440 | ||
441 | static void ifmembership_set(struct pim_ifchannel *ch, | |
442 | enum pim_ifmembership membership) | |
443 | { | |
9b29ea95 DS |
444 | struct pim_interface *pim_ifp = ch->interface->info; |
445 | ||
d62a17ae | 446 | if (ch->local_ifmembership == membership) |
447 | return; | |
448 | ||
449 | if (PIM_DEBUG_PIM_EVENTS) { | |
450 | zlog_debug("%s: (S,G)=%s membership now is %s on interface %s", | |
451 | __PRETTY_FUNCTION__, ch->sg_str, | |
452 | membership == PIM_IFMEMBERSHIP_INCLUDE ? "INCLUDE" | |
453 | : "NOINFO", | |
454 | ch->interface->name); | |
455 | } | |
456 | ||
457 | ch->local_ifmembership = membership; | |
458 | ||
9b29ea95 | 459 | pim_upstream_update_join_desired(pim_ifp->pim, ch->upstream); |
d62a17ae | 460 | pim_ifchannel_update_could_assert(ch); |
461 | pim_ifchannel_update_assert_tracking_desired(ch); | |
12e41d03 DL |
462 | } |
463 | ||
464 | ||
465 | void pim_ifchannel_membership_clear(struct interface *ifp) | |
466 | { | |
d62a17ae | 467 | struct pim_interface *pim_ifp; |
d62a17ae | 468 | struct pim_ifchannel *ch; |
12e41d03 | 469 | |
d62a17ae | 470 | pim_ifp = ifp->info; |
471 | zassert(pim_ifp); | |
12e41d03 | 472 | |
a2addae8 | 473 | RB_FOREACH (ch, pim_ifchannel_rb, &pim_ifp->ifchannel_rb) |
d62a17ae | 474 | ifmembership_set(ch, PIM_IFMEMBERSHIP_NOINFO); |
12e41d03 DL |
475 | } |
476 | ||
477 | void pim_ifchannel_delete_on_noinfo(struct interface *ifp) | |
478 | { | |
d62a17ae | 479 | struct pim_interface *pim_ifp; |
ad7b74c4 | 480 | struct pim_ifchannel *ch, *ch_tmp; |
12e41d03 | 481 | |
d62a17ae | 482 | pim_ifp = ifp->info; |
483 | zassert(pim_ifp); | |
12e41d03 | 484 | |
a2addae8 | 485 | RB_FOREACH_SAFE (ch, pim_ifchannel_rb, &pim_ifp->ifchannel_rb, ch_tmp) |
d62a17ae | 486 | delete_on_noinfo(ch); |
12e41d03 DL |
487 | } |
488 | ||
1a10fc74 DS |
489 | /* |
490 | * For a given Interface, if we are given a S,G | |
491 | * Find the *,G (If we have it). | |
492 | * If we are passed a *,G, find the *,* ifchannel | |
493 | * if we have it. | |
494 | */ | |
d62a17ae | 495 | static struct pim_ifchannel *pim_ifchannel_find_parent(struct pim_ifchannel *ch) |
1a10fc74 | 496 | { |
d62a17ae | 497 | struct prefix_sg parent_sg = ch->sg; |
498 | struct pim_ifchannel *parent = NULL; | |
499 | ||
500 | // (S,G) | |
501 | if ((parent_sg.src.s_addr != INADDR_ANY) | |
502 | && (parent_sg.grp.s_addr != INADDR_ANY)) { | |
503 | parent_sg.src.s_addr = INADDR_ANY; | |
504 | parent = pim_ifchannel_find(ch->interface, &parent_sg); | |
505 | ||
506 | if (parent) | |
507 | listnode_add(parent->sources, ch); | |
508 | return parent; | |
509 | } | |
510 | ||
511 | return NULL; | |
1a10fc74 DS |
512 | } |
513 | ||
d62a17ae | 514 | struct pim_ifchannel *pim_ifchannel_add(struct interface *ifp, |
0885a9f1 DS |
515 | struct prefix_sg *sg, |
516 | uint8_t source_flags, int up_flags) | |
12e41d03 | 517 | { |
d62a17ae | 518 | struct pim_interface *pim_ifp; |
519 | struct pim_ifchannel *ch; | |
520 | struct pim_upstream *up; | |
521 | ||
522 | ch = pim_ifchannel_find(ifp, sg); | |
523 | if (ch) | |
524 | return ch; | |
525 | ||
526 | pim_ifp = ifp->info; | |
527 | ||
d62a17ae | 528 | ch = XCALLOC(MTYPE_PIM_IFCHANNEL, sizeof(*ch)); |
529 | if (!ch) { | |
530 | zlog_warn( | |
531 | "%s: pim_ifchannel_new() failure for (S,G)=%s on interface %s", | |
74d1799a | 532 | __PRETTY_FUNCTION__, pim_str_sg_dump(sg), ifp->name); |
d62a17ae | 533 | return NULL; |
534 | } | |
535 | ||
536 | ch->flags = 0; | |
0885a9f1 DS |
537 | if ((source_flags & PIM_ENCODE_RPT_BIT) |
538 | && !(source_flags & PIM_ENCODE_WC_BIT)) | |
539 | PIM_IF_FLAG_SET_S_G_RPT(ch->flags); | |
540 | ||
d62a17ae | 541 | ch->interface = ifp; |
542 | ch->sg = *sg; | |
543 | pim_str_sg_set(sg, ch->sg_str); | |
544 | ch->parent = pim_ifchannel_find_parent(ch); | |
545 | if (ch->sg.src.s_addr == INADDR_ANY) { | |
546 | ch->sources = list_new(); | |
547 | ch->sources->cmp = | |
548 | (int (*)(void *, void *))pim_ifchannel_compare; | |
549 | } else | |
550 | ch->sources = NULL; | |
551 | ||
552 | pim_ifchannel_find_new_children(ch); | |
553 | ch->local_ifmembership = PIM_IFMEMBERSHIP_NOINFO; | |
554 | ||
555 | ch->ifjoin_state = PIM_IFJOIN_NOINFO; | |
556 | ch->t_ifjoin_expiry_timer = NULL; | |
557 | ch->t_ifjoin_prune_pending_timer = NULL; | |
558 | ch->ifjoin_creation = 0; | |
559 | ||
ad7b74c4 | 560 | RB_INSERT(pim_ifchannel_rb, &pim_ifp->ifchannel_rb, ch); |
0885a9f1 DS |
561 | |
562 | up = pim_upstream_add(pim_ifp->pim, sg, NULL, up_flags, | |
563 | __PRETTY_FUNCTION__, ch); | |
564 | ||
565 | if (!up) { | |
566 | zlog_err( | |
567 | "%s: could not attach upstream (S,G)=%s on interface %s", | |
568 | __PRETTY_FUNCTION__, pim_str_sg_dump(sg), ifp->name); | |
569 | ||
c6f94e19 DS |
570 | if (ch->parent) |
571 | listnode_delete(ch->parent->sources, ch); | |
572 | ||
0885a9f1 | 573 | pim_ifchannel_remove_children(ch); |
1e7a3a2a | 574 | if (ch->sources) |
affe9e99 | 575 | list_delete_and_null(&ch->sources); |
0885a9f1 | 576 | |
862756ff DS |
577 | THREAD_OFF(ch->t_ifjoin_expiry_timer); |
578 | THREAD_OFF(ch->t_ifjoin_prune_pending_timer); | |
579 | THREAD_OFF(ch->t_ifassert_timer); | |
580 | ||
ad7b74c4 | 581 | RB_REMOVE(pim_ifchannel_rb, &pim_ifp->ifchannel_rb, ch); |
0885a9f1 DS |
582 | XFREE(MTYPE_PIM_IFCHANNEL, ch); |
583 | return NULL; | |
584 | } | |
9c80de24 | 585 | ch->upstream = up; |
0885a9f1 DS |
586 | |
587 | listnode_add_sort(up->ifchannels, ch); | |
588 | ||
d62a17ae | 589 | ch->ifassert_my_metric = pim_macro_ch_my_assert_metric_eval(ch); |
590 | ch->ifassert_winner_metric = pim_macro_ch_my_assert_metric_eval(ch); | |
591 | ||
592 | ch->ifassert_winner.s_addr = 0; | |
593 | ||
594 | /* Assert state */ | |
595 | ch->t_ifassert_timer = NULL; | |
596 | ch->ifassert_state = PIM_IFASSERT_NOINFO; | |
597 | reset_ifassert_state(ch); | |
598 | if (pim_macro_ch_could_assert_eval(ch)) | |
599 | PIM_IF_FLAG_SET_COULD_ASSERT(ch->flags); | |
600 | else | |
601 | PIM_IF_FLAG_UNSET_COULD_ASSERT(ch->flags); | |
602 | ||
603 | if (pim_macro_assert_tracking_desired_eval(ch)) | |
604 | PIM_IF_FLAG_SET_ASSERT_TRACKING_DESIRED(ch->flags); | |
605 | else | |
606 | PIM_IF_FLAG_UNSET_ASSERT_TRACKING_DESIRED(ch->flags); | |
607 | ||
d62a17ae | 608 | if (PIM_DEBUG_PIM_TRACE) |
609 | zlog_debug("%s: ifchannel %s is created ", __PRETTY_FUNCTION__, | |
610 | ch->sg_str); | |
611 | ||
612 | return ch; | |
12e41d03 DL |
613 | } |
614 | ||
95d3f501 | 615 | static void ifjoin_to_noinfo(struct pim_ifchannel *ch, bool ch_del) |
12e41d03 | 616 | { |
aabb9a2f | 617 | pim_forward_stop(ch, !ch_del); |
d62a17ae | 618 | pim_ifchannel_ifjoin_switch(__PRETTY_FUNCTION__, ch, PIM_IFJOIN_NOINFO); |
619 | if (ch_del) | |
620 | delete_on_noinfo(ch); | |
12e41d03 DL |
621 | } |
622 | ||
623 | static int on_ifjoin_expiry_timer(struct thread *t) | |
624 | { | |
d62a17ae | 625 | struct pim_ifchannel *ch; |
12e41d03 | 626 | |
d62a17ae | 627 | ch = THREAD_ARG(t); |
12e41d03 | 628 | |
d62a17ae | 629 | ifjoin_to_noinfo(ch, true); |
630 | /* ch may have been deleted */ | |
12e41d03 | 631 | |
d62a17ae | 632 | return 0; |
12e41d03 DL |
633 | } |
634 | ||
12e41d03 DL |
635 | static int on_ifjoin_prune_pending_timer(struct thread *t) |
636 | { | |
d62a17ae | 637 | struct pim_ifchannel *ch; |
638 | int send_prune_echo; /* boolean */ | |
639 | struct interface *ifp; | |
640 | struct pim_interface *pim_ifp; | |
641 | ||
642 | ch = THREAD_ARG(t); | |
643 | ||
b456bceb DS |
644 | if (PIM_DEBUG_TRACE) |
645 | zlog_debug("%s: IFCHANNEL%s %s Prune Pending Timer Popped", | |
646 | __PRETTY_FUNCTION__, | |
647 | pim_str_sg_dump(&ch->sg), | |
648 | pim_ifchannel_ifjoin_name(ch->ifjoin_state, | |
649 | ch->flags)); | |
650 | ||
d62a17ae | 651 | if (ch->ifjoin_state == PIM_IFJOIN_PRUNE_PENDING) { |
d62a17ae | 652 | ifp = ch->interface; |
653 | pim_ifp = ifp->info; | |
c206937b DS |
654 | if (!PIM_IF_FLAG_TEST_S_G_RPT(ch->flags)) { |
655 | /* Send PruneEcho(S,G) ? */ | |
656 | send_prune_echo = | |
657 | (listcount(pim_ifp->pim_neighbor_list) > 1); | |
658 | ||
659 | if (send_prune_echo) { | |
660 | struct pim_rpf rpf; | |
661 | ||
662 | rpf.source_nexthop.interface = ifp; | |
663 | rpf.rpf_addr.u.prefix4 = | |
664 | pim_ifp->primary_address; | |
665 | pim_jp_agg_single_upstream_send(&rpf, | |
666 | ch->upstream, | |
667 | 0); | |
668 | } | |
d62a17ae | 669 | |
c206937b DS |
670 | ifjoin_to_noinfo(ch, true); |
671 | } else { | |
672 | /* If SGRpt flag is set on ifchannel, Trigger SGRpt | |
673 | * message on RP path upon prune timer expiry. | |
674 | */ | |
675 | ch->ifjoin_state = PIM_IFJOIN_PRUNE; | |
b456bceb DS |
676 | if (ch->upstream) { |
677 | struct pim_upstream *parent = | |
678 | ch->upstream->parent; | |
679 | ||
9b29ea95 DS |
680 | pim_upstream_update_join_desired(pim_ifp->pim, |
681 | ch->upstream); | |
b456bceb DS |
682 | |
683 | pim_jp_agg_single_upstream_send(&parent->rpf, | |
684 | parent, | |
685 | true); | |
686 | } | |
c206937b | 687 | } |
d62a17ae | 688 | /* from here ch may have been deleted */ |
d62a17ae | 689 | } |
690 | ||
691 | return 0; | |
12e41d03 DL |
692 | } |
693 | ||
d62a17ae | 694 | static void check_recv_upstream(int is_join, struct interface *recv_ifp, |
695 | struct in_addr upstream, struct prefix_sg *sg, | |
696 | uint8_t source_flags, int holdtime) | |
12e41d03 | 697 | { |
d62a17ae | 698 | struct pim_upstream *up; |
9b29ea95 | 699 | struct pim_interface *pim_ifp = recv_ifp->info; |
d62a17ae | 700 | |
701 | /* Upstream (S,G) in Joined state ? */ | |
9b29ea95 | 702 | up = pim_upstream_find(pim_ifp->pim, sg); |
d62a17ae | 703 | if (!up) |
704 | return; | |
705 | if (up->join_state != PIM_UPSTREAM_JOINED) | |
706 | return; | |
707 | ||
708 | /* Upstream (S,G) in Joined state */ | |
709 | ||
710 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { | |
711 | /* RPF'(S,G) not found */ | |
712 | zlog_warn("%s %s: RPF'%s not found", __FILE__, | |
713 | __PRETTY_FUNCTION__, up->sg_str); | |
714 | return; | |
715 | } | |
716 | ||
717 | /* upstream directed to RPF'(S,G) ? */ | |
718 | if (upstream.s_addr != up->rpf.rpf_addr.u.prefix4.s_addr) { | |
719 | char up_str[INET_ADDRSTRLEN]; | |
720 | char rpf_str[PREFIX_STRLEN]; | |
721 | pim_inet4_dump("<up?>", upstream, up_str, sizeof(up_str)); | |
722 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_str, | |
723 | sizeof(rpf_str)); | |
724 | zlog_warn( | |
725 | "%s %s: (S,G)=%s upstream=%s not directed to RPF'(S,G)=%s on interface %s", | |
726 | __FILE__, __PRETTY_FUNCTION__, up->sg_str, up_str, | |
727 | rpf_str, recv_ifp->name); | |
728 | return; | |
729 | } | |
730 | /* upstream directed to RPF'(S,G) */ | |
731 | ||
732 | if (is_join) { | |
733 | /* Join(S,G) to RPF'(S,G) */ | |
734 | pim_upstream_join_suppress(up, up->rpf.rpf_addr.u.prefix4, | |
735 | holdtime); | |
736 | return; | |
737 | } | |
738 | ||
739 | /* Prune to RPF'(S,G) */ | |
740 | ||
741 | if (source_flags & PIM_RPT_BIT_MASK) { | |
742 | if (source_flags & PIM_WILDCARD_BIT_MASK) { | |
743 | /* Prune(*,G) to RPF'(S,G) */ | |
744 | pim_upstream_join_timer_decrease_to_t_override( | |
745 | "Prune(*,G)", up); | |
746 | return; | |
747 | } | |
748 | ||
749 | /* Prune(S,G,rpt) to RPF'(S,G) */ | |
750 | pim_upstream_join_timer_decrease_to_t_override("Prune(S,G,rpt)", | |
751 | up); | |
752 | return; | |
753 | } | |
754 | ||
755 | /* Prune(S,G) to RPF'(S,G) */ | |
756 | pim_upstream_join_timer_decrease_to_t_override("Prune(S,G)", up); | |
12e41d03 DL |
757 | } |
758 | ||
d62a17ae | 759 | static int nonlocal_upstream(int is_join, struct interface *recv_ifp, |
760 | struct in_addr upstream, struct prefix_sg *sg, | |
761 | uint8_t source_flags, uint16_t holdtime) | |
12e41d03 | 762 | { |
d62a17ae | 763 | struct pim_interface *recv_pim_ifp; |
764 | int is_local; /* boolean */ | |
765 | ||
766 | recv_pim_ifp = recv_ifp->info; | |
767 | zassert(recv_pim_ifp); | |
768 | ||
769 | is_local = (upstream.s_addr == recv_pim_ifp->primary_address.s_addr); | |
770 | ||
771 | if (is_local) | |
772 | return 0; | |
773 | ||
774 | if (PIM_DEBUG_PIM_TRACE_DETAIL) { | |
775 | char up_str[INET_ADDRSTRLEN]; | |
776 | pim_inet4_dump("<upstream?>", upstream, up_str, sizeof(up_str)); | |
777 | zlog_warn("%s: recv %s (S,G)=%s to non-local upstream=%s on %s", | |
778 | __PRETTY_FUNCTION__, is_join ? "join" : "prune", | |
779 | pim_str_sg_dump(sg), up_str, recv_ifp->name); | |
780 | } | |
781 | ||
782 | /* | |
783 | * Since recv upstream addr was not directed to our primary | |
784 | * address, check if we should react to it in any way. | |
785 | */ | |
786 | check_recv_upstream(is_join, recv_ifp, upstream, sg, source_flags, | |
787 | holdtime); | |
788 | ||
789 | return 1; /* non-local */ | |
12e41d03 DL |
790 | } |
791 | ||
d62a17ae | 792 | void pim_ifchannel_join_add(struct interface *ifp, struct in_addr neigh_addr, |
793 | struct in_addr upstream, struct prefix_sg *sg, | |
794 | uint8_t source_flags, uint16_t holdtime) | |
12e41d03 | 795 | { |
d62a17ae | 796 | struct pim_interface *pim_ifp; |
797 | struct pim_ifchannel *ch; | |
798 | ||
799 | if (nonlocal_upstream(1 /* join */, ifp, upstream, sg, source_flags, | |
800 | holdtime)) { | |
801 | return; | |
802 | } | |
803 | ||
0885a9f1 DS |
804 | ch = pim_ifchannel_add(ifp, sg, source_flags, |
805 | PIM_UPSTREAM_FLAG_MASK_SRC_PIM); | |
d62a17ae | 806 | if (!ch) |
807 | return; | |
808 | ||
12e41d03 | 809 | /* |
d62a17ae | 810 | RFC 4601: 4.6.1. (S,G) Assert Message State Machine |
811 | ||
812 | Transitions from "I am Assert Loser" State | |
12e41d03 | 813 | |
d62a17ae | 814 | Receive Join(S,G) on Interface I |
12e41d03 | 815 | |
d62a17ae | 816 | We receive a Join(S,G) that has the Upstream Neighbor Address |
817 | field set to my primary IP address on interface I. The action is | |
818 | to transition to NoInfo state, delete this (S,G) assert state | |
819 | (Actions A5 below), and allow the normal PIM Join/Prune mechanisms | |
820 | to operate. | |
12e41d03 | 821 | |
d62a17ae | 822 | Notice: The nonlocal_upstream() test above ensures the upstream |
823 | address of the join message is our primary address. | |
12e41d03 | 824 | */ |
d62a17ae | 825 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { |
826 | char neigh_str[INET_ADDRSTRLEN]; | |
827 | pim_inet4_dump("<neigh?>", neigh_addr, neigh_str, | |
828 | sizeof(neigh_str)); | |
829 | zlog_warn("%s: Assert Loser recv Join%s from %s on %s", | |
830 | __PRETTY_FUNCTION__, ch->sg_str, neigh_str, | |
831 | ifp->name); | |
832 | ||
833 | assert_action_a5(ch); | |
834 | } | |
835 | ||
836 | pim_ifp = ifp->info; | |
837 | zassert(pim_ifp); | |
838 | ||
839 | switch (ch->ifjoin_state) { | |
840 | case PIM_IFJOIN_NOINFO: | |
841 | pim_ifchannel_ifjoin_switch(__PRETTY_FUNCTION__, ch, | |
842 | PIM_IFJOIN_JOIN); | |
843 | if (pim_macro_chisin_oiflist(ch)) { | |
9b29ea95 DS |
844 | pim_upstream_inherited_olist(pim_ifp->pim, |
845 | ch->upstream); | |
d62a17ae | 846 | pim_forward_start(ch); |
847 | } | |
848 | /* | |
849 | * If we are going to be a LHR, we need to note it | |
850 | */ | |
9d303b37 DL |
851 | if (ch->upstream->parent && (ch->upstream->parent->flags |
852 | & PIM_UPSTREAM_FLAG_MASK_SRC_IGMP) | |
d62a17ae | 853 | && !(ch->upstream->flags |
854 | & PIM_UPSTREAM_FLAG_MASK_SRC_LHR)) { | |
855 | pim_upstream_ref(ch->upstream, | |
856 | PIM_UPSTREAM_FLAG_MASK_SRC_LHR, | |
857 | __PRETTY_FUNCTION__); | |
858 | pim_upstream_keep_alive_timer_start( | |
19b807ca | 859 | ch->upstream, pim_ifp->pim->keep_alive_time); |
d62a17ae | 860 | } |
861 | break; | |
862 | case PIM_IFJOIN_JOIN: | |
863 | zassert(!ch->t_ifjoin_prune_pending_timer); | |
864 | ||
865 | /* | |
866 | In the JOIN state ch->t_ifjoin_expiry_timer may be NULL due to | |
867 | a | |
868 | previously received join message with holdtime=0xFFFF. | |
869 | */ | |
870 | if (ch->t_ifjoin_expiry_timer) { | |
871 | unsigned long remain = thread_timer_remain_second( | |
872 | ch->t_ifjoin_expiry_timer); | |
873 | if (remain > holdtime) { | |
874 | /* | |
875 | RFC 4601: 4.5.3. Receiving (S,G) Join/Prune | |
876 | Messages | |
877 | ||
878 | Transitions from Join State | |
879 | ||
880 | The (S,G) downstream state machine on | |
881 | interface I remains in | |
882 | Join state, and the Expiry Timer (ET) is | |
883 | restarted, set to | |
884 | maximum of its current value and the HoldTime | |
885 | from the | |
886 | triggering Join/Prune message. | |
887 | ||
888 | Conclusion: Do not change the ET if the | |
889 | current value is | |
890 | higher than the received join holdtime. | |
891 | */ | |
892 | return; | |
893 | } | |
894 | } | |
895 | THREAD_OFF(ch->t_ifjoin_expiry_timer); | |
896 | break; | |
897 | case PIM_IFJOIN_PRUNE: | |
898 | if (source_flags & PIM_ENCODE_RPT_BIT) | |
899 | pim_ifchannel_ifjoin_switch(__PRETTY_FUNCTION__, ch, | |
900 | PIM_IFJOIN_NOINFO); | |
901 | break; | |
902 | case PIM_IFJOIN_PRUNE_PENDING: | |
903 | THREAD_OFF(ch->t_ifjoin_prune_pending_timer); | |
904 | if (source_flags & PIM_ENCODE_RPT_BIT) { | |
905 | THREAD_OFF(ch->t_ifjoin_expiry_timer); | |
906 | pim_ifchannel_ifjoin_switch(__PRETTY_FUNCTION__, ch, | |
907 | PIM_IFJOIN_NOINFO); | |
908 | } else | |
909 | pim_ifchannel_ifjoin_switch(__PRETTY_FUNCTION__, ch, | |
910 | PIM_IFJOIN_JOIN); | |
911 | break; | |
912 | case PIM_IFJOIN_PRUNE_TMP: | |
913 | break; | |
914 | case PIM_IFJOIN_PRUNE_PENDING_TMP: | |
915 | break; | |
916 | } | |
917 | ||
918 | if (holdtime != 0xFFFF) { | |
919 | thread_add_timer(master, on_ifjoin_expiry_timer, ch, holdtime, | |
920 | &ch->t_ifjoin_expiry_timer); | |
921 | } | |
12e41d03 DL |
922 | } |
923 | ||
d62a17ae | 924 | void pim_ifchannel_prune(struct interface *ifp, struct in_addr upstream, |
925 | struct prefix_sg *sg, uint8_t source_flags, | |
12e41d03 DL |
926 | uint16_t holdtime) |
927 | { | |
d62a17ae | 928 | struct pim_ifchannel *ch; |
929 | struct pim_interface *pim_ifp; | |
930 | int jp_override_interval_msec; | |
1405c852 | 931 | |
d62a17ae | 932 | if (nonlocal_upstream(0 /* prune */, ifp, upstream, sg, source_flags, |
933 | holdtime)) { | |
934 | return; | |
935 | } | |
936 | ||
937 | ch = pim_ifchannel_find(ifp, sg); | |
938 | if (!ch && !(source_flags & PIM_ENCODE_RPT_BIT)) { | |
939 | if (PIM_DEBUG_TRACE) | |
940 | zlog_debug( | |
941 | "%s: Received prune with no relevant ifchannel %s(%s) state: %d", | |
942 | __PRETTY_FUNCTION__, ifp->name, | |
943 | pim_str_sg_dump(sg), source_flags); | |
944 | return; | |
945 | } | |
946 | ||
0885a9f1 DS |
947 | ch = pim_ifchannel_add(ifp, sg, source_flags, |
948 | PIM_UPSTREAM_FLAG_MASK_SRC_PIM); | |
d62a17ae | 949 | if (!ch) |
950 | return; | |
951 | ||
952 | pim_ifp = ifp->info; | |
953 | ||
954 | switch (ch->ifjoin_state) { | |
955 | case PIM_IFJOIN_NOINFO: | |
956 | if (source_flags & PIM_ENCODE_RPT_BIT) { | |
957 | if (!(source_flags & PIM_ENCODE_WC_BIT)) | |
958 | PIM_IF_FLAG_SET_S_G_RPT(ch->flags); | |
959 | ||
960 | ch->ifjoin_state = PIM_IFJOIN_PRUNE_PENDING; | |
961 | if (listcount(pim_ifp->pim_neighbor_list) > 1) | |
962 | jp_override_interval_msec = | |
963 | pim_if_jp_override_interval_msec(ifp); | |
964 | else | |
965 | jp_override_interval_msec = | |
966 | 0; /* schedule to expire immediately */ | |
967 | /* If we called ifjoin_prune() directly instead, care | |
968 | should | |
969 | be taken not to use "ch" afterwards since it would be | |
970 | deleted. */ | |
971 | ||
972 | THREAD_OFF(ch->t_ifjoin_prune_pending_timer); | |
973 | THREAD_OFF(ch->t_ifjoin_expiry_timer); | |
974 | thread_add_timer_msec( | |
975 | master, on_ifjoin_prune_pending_timer, ch, | |
976 | jp_override_interval_msec, | |
977 | &ch->t_ifjoin_prune_pending_timer); | |
978 | thread_add_timer(master, on_ifjoin_expiry_timer, ch, | |
979 | holdtime, &ch->t_ifjoin_expiry_timer); | |
9b29ea95 DS |
980 | pim_upstream_update_join_desired(pim_ifp->pim, |
981 | ch->upstream); | |
d62a17ae | 982 | } |
983 | break; | |
984 | case PIM_IFJOIN_PRUNE_PENDING: | |
985 | /* nothing to do */ | |
986 | break; | |
987 | case PIM_IFJOIN_JOIN: | |
988 | THREAD_OFF(ch->t_ifjoin_expiry_timer); | |
989 | ||
990 | pim_ifchannel_ifjoin_switch(__PRETTY_FUNCTION__, ch, | |
991 | PIM_IFJOIN_PRUNE_PENDING); | |
992 | ||
993 | if (listcount(pim_ifp->pim_neighbor_list) > 1) | |
994 | jp_override_interval_msec = | |
995 | pim_if_jp_override_interval_msec(ifp); | |
996 | else | |
997 | jp_override_interval_msec = | |
998 | 0; /* schedule to expire immediately */ | |
999 | /* If we called ifjoin_prune() directly instead, care should | |
1000 | be taken not to use "ch" afterwards since it would be | |
1001 | deleted. */ | |
1002 | THREAD_OFF(ch->t_ifjoin_prune_pending_timer); | |
1003 | thread_add_timer_msec(master, on_ifjoin_prune_pending_timer, ch, | |
1004 | jp_override_interval_msec, | |
1005 | &ch->t_ifjoin_prune_pending_timer); | |
1006 | break; | |
1007 | case PIM_IFJOIN_PRUNE: | |
1008 | if (source_flags & PIM_ENCODE_RPT_BIT) { | |
1009 | THREAD_OFF(ch->t_ifjoin_prune_pending_timer); | |
1010 | thread_add_timer(master, on_ifjoin_expiry_timer, ch, | |
1011 | holdtime, &ch->t_ifjoin_expiry_timer); | |
1012 | } | |
1013 | break; | |
1014 | case PIM_IFJOIN_PRUNE_TMP: | |
1015 | if (source_flags & PIM_ENCODE_RPT_BIT) { | |
1016 | ch->ifjoin_state = PIM_IFJOIN_PRUNE; | |
1017 | THREAD_OFF(ch->t_ifjoin_expiry_timer); | |
1018 | thread_add_timer(master, on_ifjoin_expiry_timer, ch, | |
1019 | holdtime, &ch->t_ifjoin_expiry_timer); | |
1020 | } | |
1021 | break; | |
1022 | case PIM_IFJOIN_PRUNE_PENDING_TMP: | |
1023 | if (source_flags & PIM_ENCODE_RPT_BIT) { | |
1024 | ch->ifjoin_state = PIM_IFJOIN_PRUNE_PENDING; | |
1025 | THREAD_OFF(ch->t_ifjoin_expiry_timer); | |
1026 | thread_add_timer(master, on_ifjoin_expiry_timer, ch, | |
1027 | holdtime, &ch->t_ifjoin_expiry_timer); | |
1028 | } | |
1029 | break; | |
1030 | } | |
12e41d03 DL |
1031 | } |
1032 | ||
d62a17ae | 1033 | int pim_ifchannel_local_membership_add(struct interface *ifp, |
1034 | struct prefix_sg *sg) | |
12e41d03 | 1035 | { |
d62a17ae | 1036 | struct pim_ifchannel *ch, *starch; |
1037 | struct pim_interface *pim_ifp; | |
43e40fdf | 1038 | struct pim_instance *pim; |
d62a17ae | 1039 | |
1040 | /* PIM enabled on interface? */ | |
1041 | pim_ifp = ifp->info; | |
1042 | if (!pim_ifp) | |
1043 | return 0; | |
1044 | if (!PIM_IF_TEST_PIM(pim_ifp->options)) | |
1045 | return 0; | |
1046 | ||
43e40fdf DS |
1047 | pim = pim_ifp->pim; |
1048 | ||
d62a17ae | 1049 | /* skip (*,G) ch creation if G is of type SSM */ |
1050 | if (sg->src.s_addr == INADDR_ANY) { | |
6f439a70 | 1051 | if (pim_is_grp_ssm(pim, sg->grp)) { |
d62a17ae | 1052 | if (PIM_DEBUG_PIM_EVENTS) |
1053 | zlog_debug( | |
1054 | "%s: local membership (S,G)=%s ignored as group is SSM", | |
1055 | __PRETTY_FUNCTION__, | |
1056 | pim_str_sg_dump(sg)); | |
1057 | return 1; | |
1058 | } | |
1059 | } | |
1060 | ||
0885a9f1 | 1061 | ch = pim_ifchannel_add(ifp, sg, 0, PIM_UPSTREAM_FLAG_MASK_SRC_IGMP); |
d62a17ae | 1062 | if (!ch) { |
1063 | return 0; | |
1064 | } | |
1065 | ||
1066 | ifmembership_set(ch, PIM_IFMEMBERSHIP_INCLUDE); | |
1067 | ||
1068 | if (sg->src.s_addr == INADDR_ANY) { | |
9b29ea95 | 1069 | struct pim_upstream *up = pim_upstream_find(pim, sg); |
d62a17ae | 1070 | struct pim_upstream *child; |
1071 | struct listnode *up_node; | |
1072 | ||
1073 | starch = ch; | |
1074 | ||
1075 | for (ALL_LIST_ELEMENTS_RO(up->sources, up_node, child)) { | |
1076 | if (PIM_DEBUG_EVENTS) | |
1077 | zlog_debug("%s %s: IGMP (S,G)=%s(%s) from %s", | |
1078 | __FILE__, __PRETTY_FUNCTION__, | |
1079 | child->sg_str, ifp->name, | |
1080 | up->sg_str); | |
1081 | ||
1082 | ch = pim_ifchannel_find(ifp, &child->sg); | |
1083 | if (pim_upstream_evaluate_join_desired_interface( | |
1084 | child, ch, starch)) { | |
1085 | pim_channel_add_oif(child->channel_oil, ifp, | |
1086 | PIM_OIF_FLAG_PROTO_STAR); | |
1eca8576 DS |
1087 | pim_upstream_switch(pim, child, |
1088 | PIM_UPSTREAM_JOINED); | |
d62a17ae | 1089 | } |
1090 | } | |
1091 | ||
43e40fdf | 1092 | if (pim->spt.switchover == PIM_SPT_INFINITY) { |
f88df3a6 | 1093 | if (pim->spt.plist) { |
d62a17ae | 1094 | struct prefix_list *plist = prefix_list_lookup( |
43e40fdf | 1095 | AFI_IP, pim->spt.plist); |
d62a17ae | 1096 | struct prefix g; |
1097 | g.family = AF_INET; | |
1098 | g.prefixlen = IPV4_MAX_PREFIXLEN; | |
1099 | g.u.prefix4 = up->sg.grp; | |
1100 | ||
1101 | if (prefix_list_apply(plist, &g) | |
1102 | == PREFIX_DENY) { | |
1103 | pim_channel_add_oif( | |
43e40fdf | 1104 | up->channel_oil, pim->regiface, |
d62a17ae | 1105 | PIM_OIF_FLAG_PROTO_IGMP); |
1106 | } | |
1107 | } | |
1108 | } else | |
43e40fdf | 1109 | pim_channel_add_oif(up->channel_oil, pim->regiface, |
d62a17ae | 1110 | PIM_OIF_FLAG_PROTO_IGMP); |
1111 | } | |
1112 | ||
1113 | return 1; | |
12e41d03 DL |
1114 | } |
1115 | ||
1116 | void pim_ifchannel_local_membership_del(struct interface *ifp, | |
4ed0af70 | 1117 | struct prefix_sg *sg) |
12e41d03 | 1118 | { |
d62a17ae | 1119 | struct pim_ifchannel *starch, *ch, *orig; |
1120 | struct pim_interface *pim_ifp; | |
1121 | ||
1122 | /* PIM enabled on interface? */ | |
1123 | pim_ifp = ifp->info; | |
1124 | if (!pim_ifp) | |
1125 | return; | |
1126 | if (!PIM_IF_TEST_PIM(pim_ifp->options)) | |
1127 | return; | |
1128 | ||
1129 | orig = ch = pim_ifchannel_find(ifp, sg); | |
1130 | if (!ch) | |
1131 | return; | |
d62a17ae | 1132 | ifmembership_set(ch, PIM_IFMEMBERSHIP_NOINFO); |
1133 | ||
1134 | if (sg->src.s_addr == INADDR_ANY) { | |
9b29ea95 | 1135 | struct pim_upstream *up = pim_upstream_find(pim_ifp->pim, sg); |
d62a17ae | 1136 | struct pim_upstream *child; |
1137 | struct listnode *up_node, *up_nnode; | |
1138 | ||
1139 | starch = ch; | |
1140 | ||
1141 | for (ALL_LIST_ELEMENTS(up->sources, up_node, up_nnode, child)) { | |
1142 | struct channel_oil *c_oil = child->channel_oil; | |
1143 | struct pim_ifchannel *chchannel = | |
1144 | pim_ifchannel_find(ifp, &child->sg); | |
1145 | struct pim_interface *pim_ifp = ifp->info; | |
1146 | ||
1147 | if (PIM_DEBUG_EVENTS) | |
1148 | zlog_debug("%s %s: Prune(S,G)=%s(%s) from %s", | |
1149 | __FILE__, __PRETTY_FUNCTION__, | |
1150 | up->sg_str, ifp->name, | |
1151 | child->sg_str); | |
1152 | ||
1153 | ch = pim_ifchannel_find(ifp, &child->sg); | |
1154 | if (c_oil | |
1155 | && !pim_upstream_evaluate_join_desired_interface( | |
1156 | child, ch, starch)) | |
1157 | pim_channel_del_oif(c_oil, ifp, | |
1158 | PIM_OIF_FLAG_PROTO_STAR); | |
1159 | ||
1160 | /* | |
1161 | * If the S,G has no if channel and the c_oil still | |
1162 | * has output here then the *,G was supplying the | |
1163 | * implied | |
1164 | * if channel. So remove it. | |
1165 | */ | |
1166 | if (!chchannel && c_oil | |
1167 | && c_oil->oil.mfcc_ttls[pim_ifp->mroute_vif_index]) | |
1168 | pim_channel_del_oif(c_oil, ifp, | |
1169 | PIM_OIF_FLAG_PROTO_STAR); | |
1170 | ||
1171 | /* Child node removal/ref count-- will happen as part of | |
1172 | * parent' delete_no_info */ | |
1173 | } | |
1174 | } | |
1175 | delete_on_noinfo(orig); | |
12e41d03 DL |
1176 | } |
1177 | ||
1178 | void pim_ifchannel_update_could_assert(struct pim_ifchannel *ch) | |
1179 | { | |
d62a17ae | 1180 | int old_couldassert = |
1181 | PIM_FORCE_BOOLEAN(PIM_IF_FLAG_TEST_COULD_ASSERT(ch->flags)); | |
1182 | int new_couldassert = | |
1183 | PIM_FORCE_BOOLEAN(pim_macro_ch_could_assert_eval(ch)); | |
1184 | ||
1185 | if (new_couldassert == old_couldassert) | |
1186 | return; | |
1187 | ||
1188 | if (PIM_DEBUG_PIM_EVENTS) { | |
1189 | char src_str[INET_ADDRSTRLEN]; | |
1190 | char grp_str[INET_ADDRSTRLEN]; | |
1191 | pim_inet4_dump("<src?>", ch->sg.src, src_str, sizeof(src_str)); | |
1192 | pim_inet4_dump("<grp?>", ch->sg.grp, grp_str, sizeof(grp_str)); | |
1193 | zlog_debug("%s: CouldAssert(%s,%s,%s) changed from %d to %d", | |
1194 | __PRETTY_FUNCTION__, src_str, grp_str, | |
1195 | ch->interface->name, old_couldassert, | |
1196 | new_couldassert); | |
1197 | } | |
1198 | ||
1199 | if (new_couldassert) { | |
1200 | /* CouldAssert(S,G,I) switched from FALSE to TRUE */ | |
1201 | PIM_IF_FLAG_SET_COULD_ASSERT(ch->flags); | |
1202 | } else { | |
1203 | /* CouldAssert(S,G,I) switched from TRUE to FALSE */ | |
1204 | PIM_IF_FLAG_UNSET_COULD_ASSERT(ch->flags); | |
1205 | ||
1206 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_WINNER) { | |
1207 | assert_action_a4(ch); | |
1208 | } | |
1209 | } | |
1210 | ||
1211 | pim_ifchannel_update_my_assert_metric(ch); | |
12e41d03 DL |
1212 | } |
1213 | ||
1214 | /* | |
1215 | my_assert_metric may be affected by: | |
1216 | ||
1217 | CouldAssert(S,G) | |
1218 | pim_ifp->primary_address | |
1219 | rpf->source_nexthop.mrib_metric_preference; | |
1220 | rpf->source_nexthop.mrib_route_metric; | |
1221 | */ | |
1222 | void pim_ifchannel_update_my_assert_metric(struct pim_ifchannel *ch) | |
1223 | { | |
d62a17ae | 1224 | struct pim_assert_metric my_metric_new = |
1225 | pim_macro_ch_my_assert_metric_eval(ch); | |
1226 | ||
1227 | if (pim_assert_metric_match(&my_metric_new, &ch->ifassert_my_metric)) | |
1228 | return; | |
1229 | ||
1230 | if (PIM_DEBUG_PIM_EVENTS) { | |
1231 | char src_str[INET_ADDRSTRLEN]; | |
1232 | char grp_str[INET_ADDRSTRLEN]; | |
1233 | char old_addr_str[INET_ADDRSTRLEN]; | |
1234 | char new_addr_str[INET_ADDRSTRLEN]; | |
1235 | pim_inet4_dump("<src?>", ch->sg.src, src_str, sizeof(src_str)); | |
1236 | pim_inet4_dump("<grp?>", ch->sg.grp, grp_str, sizeof(grp_str)); | |
1237 | pim_inet4_dump("<old_addr?>", ch->ifassert_my_metric.ip_address, | |
1238 | old_addr_str, sizeof(old_addr_str)); | |
1239 | pim_inet4_dump("<new_addr?>", my_metric_new.ip_address, | |
1240 | new_addr_str, sizeof(new_addr_str)); | |
1241 | zlog_debug( | |
1242 | "%s: my_assert_metric(%s,%s,%s) changed from %u,%u,%u,%s to %u,%u,%u,%s", | |
1243 | __PRETTY_FUNCTION__, src_str, grp_str, | |
1244 | ch->interface->name, | |
1245 | ch->ifassert_my_metric.rpt_bit_flag, | |
1246 | ch->ifassert_my_metric.metric_preference, | |
1247 | ch->ifassert_my_metric.route_metric, old_addr_str, | |
1248 | my_metric_new.rpt_bit_flag, | |
1249 | my_metric_new.metric_preference, | |
1250 | my_metric_new.route_metric, new_addr_str); | |
1251 | } | |
1252 | ||
1253 | ch->ifassert_my_metric = my_metric_new; | |
1254 | ||
1255 | if (pim_assert_metric_better(&ch->ifassert_my_metric, | |
1256 | &ch->ifassert_winner_metric)) { | |
1257 | assert_action_a5(ch); | |
1258 | } | |
12e41d03 DL |
1259 | } |
1260 | ||
1261 | void pim_ifchannel_update_assert_tracking_desired(struct pim_ifchannel *ch) | |
1262 | { | |
d62a17ae | 1263 | int old_atd = PIM_FORCE_BOOLEAN( |
1264 | PIM_IF_FLAG_TEST_ASSERT_TRACKING_DESIRED(ch->flags)); | |
1265 | int new_atd = | |
1266 | PIM_FORCE_BOOLEAN(pim_macro_assert_tracking_desired_eval(ch)); | |
1267 | ||
1268 | if (new_atd == old_atd) | |
1269 | return; | |
1270 | ||
1271 | if (PIM_DEBUG_PIM_EVENTS) { | |
1272 | char src_str[INET_ADDRSTRLEN]; | |
1273 | char grp_str[INET_ADDRSTRLEN]; | |
1274 | pim_inet4_dump("<src?>", ch->sg.src, src_str, sizeof(src_str)); | |
1275 | pim_inet4_dump("<grp?>", ch->sg.grp, grp_str, sizeof(grp_str)); | |
1276 | zlog_debug( | |
1277 | "%s: AssertTrackingDesired(%s,%s,%s) changed from %d to %d", | |
1278 | __PRETTY_FUNCTION__, src_str, grp_str, | |
1279 | ch->interface->name, old_atd, new_atd); | |
1280 | } | |
1281 | ||
1282 | if (new_atd) { | |
1283 | /* AssertTrackingDesired(S,G,I) switched from FALSE to TRUE */ | |
1284 | PIM_IF_FLAG_SET_ASSERT_TRACKING_DESIRED(ch->flags); | |
1285 | } else { | |
1286 | /* AssertTrackingDesired(S,G,I) switched from TRUE to FALSE */ | |
1287 | PIM_IF_FLAG_UNSET_ASSERT_TRACKING_DESIRED(ch->flags); | |
1288 | ||
1289 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { | |
1290 | assert_action_a5(ch); | |
1291 | } | |
1292 | } | |
12e41d03 | 1293 | } |
c8507a16 DS |
1294 | |
1295 | /* | |
1296 | * If we have a new pim interface, check to | |
1297 | * see if any of the pre-existing channels have | |
1298 | * their upstream out that way and turn on forwarding | |
1299 | * for that ifchannel then. | |
1300 | */ | |
d62a17ae | 1301 | void pim_ifchannel_scan_forward_start(struct interface *new_ifp) |
c8507a16 | 1302 | { |
d62a17ae | 1303 | struct pim_interface *new_pim_ifp = new_ifp->info; |
f88df3a6 | 1304 | struct pim_instance *pim = new_pim_ifp->pim; |
ad7b74c4 | 1305 | struct interface *ifp; |
d62a17ae | 1306 | |
451fda4f | 1307 | FOR_ALL_INTERFACES (pim->vrf, ifp) { |
d62a17ae | 1308 | struct pim_interface *loop_pim_ifp = ifp->info; |
d62a17ae | 1309 | struct pim_ifchannel *ch; |
1310 | ||
1311 | if (!loop_pim_ifp) | |
1312 | continue; | |
1313 | ||
1314 | if (new_pim_ifp == loop_pim_ifp) | |
1315 | continue; | |
1316 | ||
a2addae8 | 1317 | RB_FOREACH (ch, pim_ifchannel_rb, &loop_pim_ifp->ifchannel_rb) { |
d62a17ae | 1318 | if (ch->ifjoin_state == PIM_IFJOIN_JOIN) { |
1319 | struct pim_upstream *up = ch->upstream; | |
1320 | if ((!up->channel_oil) | |
1321 | && (up->rpf.source_nexthop | |
1322 | .interface == new_ifp)) | |
1323 | pim_forward_start(ch); | |
1324 | } | |
1325 | } | |
1326 | } | |
c8507a16 | 1327 | } |
220d8a49 DS |
1328 | |
1329 | /* | |
1330 | * Downstream per-interface (S,G,rpt) state machine | |
1331 | * states that we need to move (S,G,rpt) items | |
1332 | * into different states at the start of the | |
1333 | * reception of a *,G join as well, when | |
1334 | * we get End of Message | |
1335 | */ | |
d62a17ae | 1336 | void pim_ifchannel_set_star_g_join_state(struct pim_ifchannel *ch, int eom, |
c206937b | 1337 | uint8_t join) |
220d8a49 | 1338 | { |
d62a17ae | 1339 | struct pim_ifchannel *child; |
37736d08 | 1340 | struct listnode *ch_node, *nch_node; |
c206937b DS |
1341 | struct pim_instance *pim = |
1342 | ((struct pim_interface *)ch->interface->info)->pim; | |
d62a17ae | 1343 | |
1344 | if (PIM_DEBUG_PIM_TRACE) | |
1345 | zlog_debug( | |
1346 | "%s: %s %s eom: %d join %u", __PRETTY_FUNCTION__, | |
1347 | pim_ifchannel_ifjoin_name(ch->ifjoin_state, ch->flags), | |
1348 | ch->sg_str, eom, join); | |
1349 | if (!ch->sources) | |
1350 | return; | |
1351 | ||
37736d08 | 1352 | for (ALL_LIST_ELEMENTS(ch->sources, ch_node, nch_node, child)) { |
d62a17ae | 1353 | if (!PIM_IF_FLAG_TEST_S_G_RPT(child->flags)) |
1354 | continue; | |
1355 | ||
1356 | switch (child->ifjoin_state) { | |
1357 | case PIM_IFJOIN_NOINFO: | |
1358 | case PIM_IFJOIN_JOIN: | |
1359 | break; | |
1360 | case PIM_IFJOIN_PRUNE: | |
1361 | if (!eom) | |
1362 | child->ifjoin_state = PIM_IFJOIN_PRUNE_TMP; | |
1363 | break; | |
1364 | case PIM_IFJOIN_PRUNE_PENDING: | |
1365 | if (!eom) | |
1366 | child->ifjoin_state = | |
1367 | PIM_IFJOIN_PRUNE_PENDING_TMP; | |
1368 | break; | |
1369 | case PIM_IFJOIN_PRUNE_TMP: | |
1370 | case PIM_IFJOIN_PRUNE_PENDING_TMP: | |
37736d08 DS |
1371 | if (!eom) |
1372 | break; | |
1373 | ||
1374 | if (child->ifjoin_state == PIM_IFJOIN_PRUNE_PENDING_TMP) | |
1375 | THREAD_OFF(child->t_ifjoin_prune_pending_timer); | |
1376 | THREAD_OFF(child->t_ifjoin_expiry_timer); | |
1377 | struct pim_upstream *parent = | |
1378 | child->upstream->parent; | |
1379 | ||
1380 | PIM_IF_FLAG_UNSET_S_G_RPT(child->flags); | |
1381 | child->ifjoin_state = PIM_IFJOIN_NOINFO; | |
1382 | ||
1383 | if (I_am_RP(pim, child->sg.grp)) { | |
1384 | pim_channel_add_oif( | |
1385 | child->upstream->channel_oil, | |
1386 | ch->interface, | |
1387 | PIM_OIF_FLAG_PROTO_STAR); | |
1388 | pim_upstream_switch( | |
1389 | pim, child->upstream, | |
1390 | PIM_UPSTREAM_JOINED); | |
1391 | pim_jp_agg_single_upstream_send( | |
1392 | &child->upstream->rpf, | |
1393 | child->upstream, true); | |
c206937b | 1394 | } |
37736d08 DS |
1395 | if (parent) |
1396 | pim_jp_agg_single_upstream_send( | |
1397 | &parent->rpf, | |
1398 | parent, true); | |
1399 | ||
1400 | delete_on_noinfo(child); | |
d62a17ae | 1401 | break; |
1402 | } | |
1405c852 | 1403 | } |
220d8a49 | 1404 | } |
a625e937 | 1405 | |
d62a17ae | 1406 | unsigned int pim_ifchannel_hash_key(void *arg) |
a625e937 | 1407 | { |
d62a17ae | 1408 | struct pim_ifchannel *ch = (struct pim_ifchannel *)arg; |
a625e937 | 1409 | |
d62a17ae | 1410 | return jhash_2words(ch->sg.src.s_addr, ch->sg.grp.s_addr, 0); |
a625e937 | 1411 | } |