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12e41d03 DL |
1 | /* |
2 | PIM for Quagga | |
3 | Copyright (C) 2008 Everton da Silva Marques | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 2 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, but | |
11 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; see the file COPYING; if not, write to the | |
17 | Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, | |
18 | MA 02110-1301 USA | |
12e41d03 DL |
19 | */ |
20 | ||
21 | #include <zebra.h> | |
22 | ||
23 | #include "linklist.h" | |
24 | #include "thread.h" | |
25 | #include "memory.h" | |
744d91b3 | 26 | #include "if.h" |
c8507a16 | 27 | #include "vrf.h" |
a625e937 DS |
28 | #include "hash.h" |
29 | #include "jhash.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" |
12e41d03 | 44 | |
3fdfd943 DS |
45 | int |
46 | pim_ifchannel_compare (struct pim_ifchannel *ch1, struct pim_ifchannel *ch2) | |
47 | { | |
48 | struct pim_interface *pim_ifp1; | |
49 | struct pim_interface *pim_ifp2; | |
50 | ||
51 | if (ntohl(ch1->sg.grp.s_addr) < ntohl(ch2->sg.grp.s_addr)) | |
52 | return -1; | |
53 | ||
54 | if (ntohl(ch1->sg.grp.s_addr) > ntohl(ch2->sg.grp.s_addr)) | |
55 | return 1; | |
56 | ||
57 | if (ntohl(ch1->sg.src.s_addr) < ntohl(ch2->sg.src.s_addr)) | |
58 | return -1; | |
59 | ||
60 | if (ntohl(ch1->sg.src.s_addr) > ntohl(ch2->sg.src.s_addr)) | |
61 | return 1; | |
62 | ||
63 | pim_ifp1 = ch1->interface->info; | |
64 | pim_ifp2 = ch2->interface->info; | |
65 | if (ntohl(pim_ifp1->primary_address.s_addr) < ntohl(pim_ifp2->primary_address.s_addr)) | |
66 | return -1; | |
67 | ||
68 | if (ntohl(pim_ifp1->primary_address.s_addr) > ntohl(pim_ifp2->primary_address.s_addr)) | |
69 | return 1; | |
70 | ||
71 | if (pim_ifp1->mroute_vif_index < pim_ifp2->mroute_vif_index) | |
72 | return -1; | |
73 | ||
74 | if (pim_ifp1->mroute_vif_index > pim_ifp2->mroute_vif_index) | |
75 | return 1; | |
76 | ||
77 | return 0; | |
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 | */ | |
85 | static void | |
86 | pim_ifchannel_remove_children (struct pim_ifchannel *ch) | |
87 | { | |
1a10fc74 DS |
88 | struct pim_ifchannel *child; |
89 | ||
3fdfd943 | 90 | if (!ch->sources) |
1a10fc74 DS |
91 | return; |
92 | ||
3fdfd943 | 93 | while (!list_isempty (ch->sources)) |
1a10fc74 | 94 | { |
3fdfd943 DS |
95 | child = listnode_head (ch->sources); |
96 | child->parent = NULL; | |
97 | listnode_delete (ch->sources, child); | |
1a10fc74 DS |
98 | } |
99 | } | |
100 | ||
101 | /* | |
102 | * A (*,G) or a (*,*) is being created | |
103 | * find all the children that would point | |
104 | * at us. | |
105 | */ | |
106 | static void | |
107 | pim_ifchannel_find_new_children (struct pim_ifchannel *ch) | |
108 | { | |
109 | struct pim_interface *pim_ifp = ch->interface->info; | |
110 | struct pim_ifchannel *child; | |
111 | struct listnode *ch_node; | |
112 | ||
113 | // Basic Sanity that we are not being silly | |
4ed0af70 DS |
114 | if ((ch->sg.src.s_addr != INADDR_ANY) && |
115 | (ch->sg.grp.s_addr != INADDR_ANY)) | |
1a10fc74 DS |
116 | return; |
117 | ||
4ed0af70 DS |
118 | if ((ch->sg.src.s_addr == INADDR_ANY) && |
119 | (ch->sg.grp.s_addr == INADDR_ANY)) | |
1a10fc74 DS |
120 | return; |
121 | ||
122 | for (ALL_LIST_ELEMENTS_RO (pim_ifp->pim_ifchannel_list, ch_node, child)) | |
123 | { | |
4ed0af70 DS |
124 | if ((ch->sg.grp.s_addr != INADDR_ANY) && |
125 | (child->sg.grp.s_addr == ch->sg.grp.s_addr) && | |
1a10fc74 | 126 | (child != ch)) |
3fdfd943 DS |
127 | { |
128 | child->parent = ch; | |
129 | listnode_add_sort (ch->sources, child); | |
130 | } | |
1a10fc74 DS |
131 | } |
132 | } | |
133 | ||
12e41d03 DL |
134 | void pim_ifchannel_free(struct pim_ifchannel *ch) |
135 | { | |
12e41d03 DL |
136 | XFREE(MTYPE_PIM_IFCHANNEL, ch); |
137 | } | |
138 | ||
139 | void pim_ifchannel_delete(struct pim_ifchannel *ch) | |
140 | { | |
141 | struct pim_interface *pim_ifp; | |
142 | ||
143 | pim_ifp = ch->interface->info; | |
12e41d03 | 144 | |
ef71d1f8 DS |
145 | if (ch->upstream->channel_oil) |
146 | { | |
f663aa7a DS |
147 | uint32_t mask = PIM_OIF_FLAG_PROTO_PIM; |
148 | if (ch->upstream->flags & PIM_UPSTREAM_FLAG_MASK_SRC_IGMP) | |
149 | mask = PIM_OIF_FLAG_PROTO_IGMP; | |
150 | ||
151 | pim_channel_del_oif (ch->upstream->channel_oil, ch->interface, mask); | |
ef71d1f8 DS |
152 | /* |
153 | * Do we have any S,G's that are inheriting? | |
154 | * Nuke from on high too. | |
155 | */ | |
156 | if (ch->upstream->sources) | |
157 | { | |
158 | struct pim_upstream *child; | |
159 | struct listnode *up_node; | |
160 | ||
161 | for (ALL_LIST_ELEMENTS_RO (ch->upstream->sources, up_node, child)) | |
781a1745 | 162 | pim_channel_del_oif (child->channel_oil, ch->interface, PIM_OIF_FLAG_PROTO_STAR); |
ef71d1f8 DS |
163 | } |
164 | } | |
165 | ||
1a10fc74 DS |
166 | /* |
167 | * When this channel is removed | |
168 | * we need to find all our children | |
169 | * and make sure our pointers are fixed | |
170 | */ | |
171 | pim_ifchannel_remove_children (ch); | |
172 | ||
3fdfd943 DS |
173 | if (ch->sources) |
174 | list_delete (ch->sources); | |
175 | ||
12e41d03 DL |
176 | if (ch->ifjoin_state != PIM_IFJOIN_NOINFO) { |
177 | pim_upstream_update_join_desired(ch->upstream); | |
178 | } | |
179 | ||
e5905a3b | 180 | pim_upstream_del(ch->upstream, __PRETTY_FUNCTION__); |
5ce79466 | 181 | ch->upstream = NULL; |
12e41d03 DL |
182 | |
183 | THREAD_OFF(ch->t_ifjoin_expiry_timer); | |
184 | THREAD_OFF(ch->t_ifjoin_prune_pending_timer); | |
185 | THREAD_OFF(ch->t_ifassert_timer); | |
186 | ||
3fdfd943 DS |
187 | if (ch->parent) |
188 | { | |
189 | listnode_delete (ch->parent->sources, ch); | |
190 | ch->parent = NULL; | |
191 | } | |
12e41d03 DL |
192 | /* |
193 | notice that listnode_delete() can't be moved | |
194 | into pim_ifchannel_free() because the later is | |
195 | called by list_delete_all_node() | |
196 | */ | |
197 | listnode_delete(pim_ifp->pim_ifchannel_list, ch); | |
a625e937 | 198 | hash_release(pim_ifp->pim_ifchannel_hash, ch); |
ea4a71fc | 199 | listnode_delete(pim_ifchannel_list, ch); |
12e41d03 DL |
200 | |
201 | pim_ifchannel_free(ch); | |
202 | } | |
cb24fec4 DS |
203 | |
204 | void | |
205 | pim_ifchannel_delete_all (struct interface *ifp) | |
206 | { | |
207 | struct pim_interface *pim_ifp; | |
208 | struct listnode *ifchannel_node; | |
209 | struct listnode *ifchannel_nextnode; | |
210 | struct pim_ifchannel *ifchannel; | |
211 | ||
212 | pim_ifp = ifp->info; | |
ef71d1f8 DS |
213 | if (!pim_ifp) |
214 | return; | |
cb24fec4 DS |
215 | |
216 | for (ALL_LIST_ELEMENTS (pim_ifp->pim_ifchannel_list, ifchannel_node, | |
217 | ifchannel_nextnode, ifchannel)) | |
218 | { | |
219 | pim_ifchannel_delete (ifchannel); | |
220 | } | |
221 | } | |
12e41d03 DL |
222 | |
223 | static void delete_on_noinfo(struct pim_ifchannel *ch) | |
224 | { | |
1be8f9d3 | 225 | if (ch->local_ifmembership == PIM_IFMEMBERSHIP_NOINFO && |
45b0c8f3 DS |
226 | ch->ifjoin_state == PIM_IFJOIN_NOINFO && |
227 | ch->t_ifjoin_expiry_timer == NULL) | |
12e41d03 | 228 | pim_ifchannel_delete(ch); |
1be8f9d3 | 229 | |
12e41d03 DL |
230 | } |
231 | ||
232 | void pim_ifchannel_ifjoin_switch(const char *caller, | |
233 | struct pim_ifchannel *ch, | |
234 | enum pim_ifjoin_state new_state) | |
235 | { | |
236 | enum pim_ifjoin_state old_state = ch->ifjoin_state; | |
237 | ||
04329d4e | 238 | if (PIM_DEBUG_PIM_EVENTS) |
594a78cc DS |
239 | zlog_debug ("PIM_IFCHANNEL(%s): %s is switching from %s to %s", |
240 | ch->interface->name, | |
8bfb8b67 | 241 | ch->sg_str, |
04329d4e DS |
242 | pim_ifchannel_ifjoin_name (ch->ifjoin_state), |
243 | pim_ifchannel_ifjoin_name (new_state)); | |
244 | ||
245 | ||
12e41d03 | 246 | if (old_state == new_state) { |
7adf0260 DS |
247 | if (PIM_DEBUG_PIM_EVENTS) { |
248 | zlog_debug("%s calledby %s: non-transition on state %d (%s)", | |
249 | __PRETTY_FUNCTION__, caller, new_state, | |
250 | pim_ifchannel_ifjoin_name(new_state)); | |
251 | } | |
12e41d03 DL |
252 | return; |
253 | } | |
254 | ||
12e41d03 DL |
255 | ch->ifjoin_state = new_state; |
256 | ||
6578dfa3 DS |
257 | if (ch->sg.src.s_addr == INADDR_ANY) |
258 | { | |
259 | struct pim_upstream *up = ch->upstream; | |
260 | struct pim_upstream *child; | |
261 | struct listnode *up_node; | |
262 | ||
263 | if (up) | |
264 | { | |
265 | if (ch->ifjoin_state == PIM_IFJOIN_NOINFO) | |
266 | { | |
267 | for (ALL_LIST_ELEMENTS_RO (up->sources, up_node, child)) | |
268 | { | |
269 | struct channel_oil *c_oil = child->channel_oil; | |
270 | struct pim_interface *pim_ifp = ch->interface->info; | |
271 | ||
272 | if (PIM_DEBUG_PIM_TRACE) | |
273 | zlog_debug("%s %s: Prune(S,G)=%s from %s", | |
274 | __FILE__, __PRETTY_FUNCTION__, | |
275 | child->sg_str, up->sg_str); | |
276 | if (!c_oil) | |
277 | continue; | |
278 | ||
279 | if (!pim_upstream_evaluate_join_desired (child)) | |
a118e71d DS |
280 | { |
281 | pim_channel_del_oif (c_oil, ch->interface, PIM_OIF_FLAG_PROTO_STAR); | |
282 | pim_upstream_update_join_desired (child); | |
283 | } | |
6578dfa3 DS |
284 | |
285 | /* | |
286 | * If the S,G has no if channel and the c_oil still | |
287 | * has output here then the *,G was supplying the implied | |
288 | * if channel. So remove it. | |
a118e71d | 289 | * I think this is dead code now. is it? |
6578dfa3 DS |
290 | */ |
291 | if (!ch && c_oil->oil.mfcc_ttls[pim_ifp->mroute_vif_index]) | |
781a1745 | 292 | pim_channel_del_oif (c_oil, ch->interface, PIM_OIF_FLAG_PROTO_STAR); |
6578dfa3 DS |
293 | } |
294 | } | |
295 | if (ch->ifjoin_state == PIM_IFJOIN_JOIN) | |
296 | { | |
297 | for (ALL_LIST_ELEMENTS_RO (up->sources, up_node, child)) | |
298 | { | |
299 | if (PIM_DEBUG_PIM_TRACE) | |
300 | zlog_debug("%s %s: Join(S,G)=%s from %s", | |
301 | __FILE__, __PRETTY_FUNCTION__, | |
302 | child->sg_str, up->sg_str); | |
303 | ||
304 | if (pim_upstream_evaluate_join_desired (child)) | |
305 | { | |
781a1745 | 306 | pim_channel_add_oif (child->channel_oil, ch->interface, PIM_OIF_FLAG_PROTO_STAR); |
a118e71d | 307 | pim_upstream_update_join_desired (child); |
6578dfa3 DS |
308 | } |
309 | } | |
310 | } | |
311 | } | |
312 | } | |
12e41d03 | 313 | /* Transition to/from NOINFO ? */ |
1be8f9d3 DS |
314 | if ((old_state == PIM_IFJOIN_NOINFO) || |
315 | (new_state == PIM_IFJOIN_NOINFO)) { | |
12e41d03 DL |
316 | |
317 | if (PIM_DEBUG_PIM_EVENTS) { | |
ee1a477a | 318 | zlog_debug("PIM_IFCHANNEL_%s: (S,G)=%s on interface %s", |
12e41d03 | 319 | ((new_state == PIM_IFJOIN_NOINFO) ? "DOWN" : "UP"), |
8bfb8b67 | 320 | ch->sg_str, ch->interface->name); |
12e41d03 DL |
321 | } |
322 | ||
323 | /* | |
324 | Record uptime of state transition to/from NOINFO | |
325 | */ | |
326 | ch->ifjoin_creation = pim_time_monotonic_sec(); | |
327 | ||
328 | pim_upstream_update_join_desired(ch->upstream); | |
329 | pim_ifchannel_update_could_assert(ch); | |
330 | pim_ifchannel_update_assert_tracking_desired(ch); | |
331 | } | |
332 | } | |
333 | ||
334 | const char *pim_ifchannel_ifjoin_name(enum pim_ifjoin_state ifjoin_state) | |
335 | { | |
336 | switch (ifjoin_state) { | |
be4791f2 DS |
337 | case PIM_IFJOIN_NOINFO: return "NOINFO"; |
338 | case PIM_IFJOIN_JOIN: return "JOIN"; | |
339 | case PIM_IFJOIN_PRUNE: return "PRUNE"; | |
340 | case PIM_IFJOIN_PRUNE_PENDING: return "PRUNEP"; | |
341 | case PIM_IFJOIN_PRUNE_TMP: return "PRUNET"; | |
342 | case PIM_IFJOIN_PRUNE_PENDING_TMP: return "PRUNEPT"; | |
12e41d03 DL |
343 | } |
344 | ||
345 | return "ifjoin_bad_state"; | |
346 | } | |
347 | ||
348 | const char *pim_ifchannel_ifassert_name(enum pim_ifassert_state ifassert_state) | |
349 | { | |
350 | switch (ifassert_state) { | |
351 | case PIM_IFASSERT_NOINFO: return "NOINFO"; | |
352 | case PIM_IFASSERT_I_AM_WINNER: return "WINNER"; | |
353 | case PIM_IFASSERT_I_AM_LOSER: return "LOSER"; | |
354 | } | |
355 | ||
356 | return "ifassert_bad_state"; | |
357 | } | |
358 | ||
359 | /* | |
360 | RFC 4601: 4.6.5. Assert State Macros | |
361 | ||
362 | AssertWinner(S,G,I) defaults to NULL and AssertWinnerMetric(S,G,I) | |
363 | defaults to Infinity when in the NoInfo state. | |
364 | */ | |
365 | void reset_ifassert_state(struct pim_ifchannel *ch) | |
366 | { | |
367 | THREAD_OFF(ch->t_ifassert_timer); | |
368 | ||
369 | pim_ifassert_winner_set(ch, | |
370 | PIM_IFASSERT_NOINFO, | |
371 | qpim_inaddr_any, | |
372 | qpim_infinite_assert_metric); | |
373 | } | |
374 | ||
12e41d03 | 375 | struct pim_ifchannel *pim_ifchannel_find(struct interface *ifp, |
4ed0af70 | 376 | struct prefix_sg *sg) |
12e41d03 DL |
377 | { |
378 | struct pim_interface *pim_ifp; | |
12e41d03 | 379 | struct pim_ifchannel *ch; |
a625e937 | 380 | struct pim_ifchannel lookup; |
12e41d03 DL |
381 | |
382 | pim_ifp = ifp->info; | |
383 | ||
384 | if (!pim_ifp) { | |
5074a423 | 385 | zlog_warn("%s: (S,G)=%s: multicast not enabled on interface %s", |
12e41d03 | 386 | __PRETTY_FUNCTION__, |
5074a423 | 387 | pim_str_sg_dump (sg), |
12e41d03 | 388 | ifp->name); |
a625e937 | 389 | return NULL; |
12e41d03 DL |
390 | } |
391 | ||
a625e937 DS |
392 | lookup.sg = *sg; |
393 | ch = hash_lookup (pim_ifp->pim_ifchannel_hash, &lookup); | |
12e41d03 | 394 | |
a625e937 | 395 | return ch; |
12e41d03 DL |
396 | } |
397 | ||
398 | static void ifmembership_set(struct pim_ifchannel *ch, | |
399 | enum pim_ifmembership membership) | |
400 | { | |
401 | if (ch->local_ifmembership == membership) | |
402 | return; | |
403 | ||
7adf0260 | 404 | if (PIM_DEBUG_PIM_EVENTS) { |
ee1a477a | 405 | zlog_debug("%s: (S,G)=%s membership now is %s on interface %s", |
12e41d03 | 406 | __PRETTY_FUNCTION__, |
8bfb8b67 | 407 | ch->sg_str, |
12e41d03 DL |
408 | membership == PIM_IFMEMBERSHIP_INCLUDE ? "INCLUDE" : "NOINFO", |
409 | ch->interface->name); | |
410 | } | |
411 | ||
412 | ch->local_ifmembership = membership; | |
413 | ||
414 | pim_upstream_update_join_desired(ch->upstream); | |
415 | pim_ifchannel_update_could_assert(ch); | |
416 | pim_ifchannel_update_assert_tracking_desired(ch); | |
417 | } | |
418 | ||
419 | ||
420 | void pim_ifchannel_membership_clear(struct interface *ifp) | |
421 | { | |
422 | struct pim_interface *pim_ifp; | |
423 | struct listnode *ch_node; | |
424 | struct pim_ifchannel *ch; | |
425 | ||
426 | pim_ifp = ifp->info; | |
427 | zassert(pim_ifp); | |
428 | ||
429 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->pim_ifchannel_list, ch_node, ch)) { | |
430 | ifmembership_set(ch, PIM_IFMEMBERSHIP_NOINFO); | |
431 | } | |
432 | } | |
433 | ||
434 | void pim_ifchannel_delete_on_noinfo(struct interface *ifp) | |
435 | { | |
436 | struct pim_interface *pim_ifp; | |
437 | struct listnode *node; | |
438 | struct listnode *next_node; | |
439 | struct pim_ifchannel *ch; | |
440 | ||
441 | pim_ifp = ifp->info; | |
442 | zassert(pim_ifp); | |
443 | ||
444 | for (ALL_LIST_ELEMENTS(pim_ifp->pim_ifchannel_list, node, next_node, ch)) { | |
445 | delete_on_noinfo(ch); | |
446 | } | |
447 | } | |
448 | ||
1a10fc74 DS |
449 | /* |
450 | * For a given Interface, if we are given a S,G | |
451 | * Find the *,G (If we have it). | |
452 | * If we are passed a *,G, find the *,* ifchannel | |
453 | * if we have it. | |
454 | */ | |
455 | static struct pim_ifchannel * | |
3fdfd943 | 456 | pim_ifchannel_find_parent (struct pim_ifchannel *ch) |
1a10fc74 | 457 | { |
3fdfd943 DS |
458 | struct prefix_sg parent_sg = ch->sg; |
459 | struct pim_ifchannel *parent = NULL; | |
1a10fc74 DS |
460 | |
461 | // (S,G) | |
3fdfd943 DS |
462 | if ((parent_sg.src.s_addr != INADDR_ANY) && |
463 | (parent_sg.grp.s_addr != INADDR_ANY)) | |
1a10fc74 | 464 | { |
4ed0af70 | 465 | parent_sg.src.s_addr = INADDR_ANY; |
3fdfd943 DS |
466 | parent = pim_ifchannel_find (ch->interface, &parent_sg); |
467 | ||
468 | if (parent) | |
469 | listnode_add (parent->sources, ch); | |
470 | return parent; | |
1a10fc74 DS |
471 | } |
472 | ||
3fdfd943 | 473 | return NULL; |
1a10fc74 DS |
474 | } |
475 | ||
476 | struct pim_ifchannel * | |
477 | pim_ifchannel_add(struct interface *ifp, | |
4a40c37a | 478 | struct prefix_sg *sg, int flags) |
12e41d03 | 479 | { |
535db05b | 480 | struct pim_interface *pim_ifp; |
12e41d03 | 481 | struct pim_ifchannel *ch; |
535db05b | 482 | struct pim_upstream *up; |
12e41d03 | 483 | |
5074a423 | 484 | ch = pim_ifchannel_find(ifp, sg); |
12e41d03 DL |
485 | if (ch) |
486 | return ch; | |
487 | ||
535db05b | 488 | pim_ifp = ifp->info; |
535db05b | 489 | |
e5905a3b | 490 | up = pim_upstream_add(sg, NULL, flags, __PRETTY_FUNCTION__); |
535db05b | 491 | if (!up) { |
5074a423 | 492 | zlog_err("%s: could not attach upstream (S,G)=%s on interface %s", |
535db05b | 493 | __PRETTY_FUNCTION__, |
5074a423 | 494 | pim_str_sg_dump (sg), ifp->name); |
535db05b DS |
495 | return NULL; |
496 | } | |
497 | ||
98573e19 | 498 | ch = XCALLOC(MTYPE_PIM_IFCHANNEL, sizeof(*ch)); |
535db05b | 499 | if (!ch) { |
5074a423 | 500 | zlog_warn("%s: pim_ifchannel_new() failure for (S,G)=%s on interface %s", |
535db05b | 501 | __PRETTY_FUNCTION__, |
8bfb8b67 | 502 | up->sg_str, ifp->name); |
3fdfd943 DS |
503 | |
504 | pim_upstream_del (up, __PRETTY_FUNCTION__); | |
535db05b DS |
505 | return NULL; |
506 | } | |
12e41d03 | 507 | |
535db05b DS |
508 | ch->flags = 0; |
509 | ch->upstream = up; | |
510 | ch->interface = ifp; | |
5074a423 | 511 | ch->sg = *sg; |
8bfb8b67 | 512 | pim_str_sg_set (sg, ch->sg_str); |
3fdfd943 DS |
513 | ch->parent = pim_ifchannel_find_parent (ch); |
514 | if (ch->sg.src.s_addr == INADDR_ANY) | |
515 | { | |
516 | ch->sources = list_new (); | |
517 | ch->sources->cmp = (int (*)(void *, void *))pim_ifchannel_compare; | |
518 | } | |
519 | else | |
520 | ch->sources = NULL; | |
521 | ||
1a10fc74 | 522 | pim_ifchannel_find_new_children (ch); |
535db05b DS |
523 | ch->local_ifmembership = PIM_IFMEMBERSHIP_NOINFO; |
524 | ||
525 | ch->ifjoin_state = PIM_IFJOIN_NOINFO; | |
526 | ch->t_ifjoin_expiry_timer = NULL; | |
527 | ch->t_ifjoin_prune_pending_timer = NULL; | |
528 | ch->ifjoin_creation = 0; | |
529 | ||
530 | ch->ifassert_my_metric = pim_macro_ch_my_assert_metric_eval(ch); | |
531 | ch->ifassert_winner_metric = pim_macro_ch_my_assert_metric_eval (ch); | |
532 | ||
533 | ch->ifassert_winner.s_addr = 0; | |
534 | ||
535 | /* Assert state */ | |
536 | ch->t_ifassert_timer = NULL; | |
98573e19 | 537 | ch->ifassert_state = PIM_IFASSERT_NOINFO; |
535db05b DS |
538 | reset_ifassert_state(ch); |
539 | if (pim_macro_ch_could_assert_eval(ch)) | |
540 | PIM_IF_FLAG_SET_COULD_ASSERT(ch->flags); | |
541 | else | |
542 | PIM_IF_FLAG_UNSET_COULD_ASSERT(ch->flags); | |
543 | ||
544 | if (pim_macro_assert_tracking_desired_eval(ch)) | |
545 | PIM_IF_FLAG_SET_ASSERT_TRACKING_DESIRED(ch->flags); | |
546 | else | |
547 | PIM_IF_FLAG_UNSET_ASSERT_TRACKING_DESIRED(ch->flags); | |
548 | ||
549 | /* Attach to list */ | |
bbd64ce1 | 550 | listnode_add_sort(pim_ifp->pim_ifchannel_list, ch); |
a625e937 | 551 | ch = hash_get (pim_ifp->pim_ifchannel_hash, ch, hash_alloc_intern); |
ea4a71fc | 552 | listnode_add_sort(pim_ifchannel_list, ch); |
535db05b | 553 | |
535db05b | 554 | return ch; |
12e41d03 DL |
555 | } |
556 | ||
557 | static void ifjoin_to_noinfo(struct pim_ifchannel *ch) | |
558 | { | |
559 | pim_forward_stop(ch); | |
560 | pim_ifchannel_ifjoin_switch(__PRETTY_FUNCTION__, ch, PIM_IFJOIN_NOINFO); | |
561 | delete_on_noinfo(ch); | |
562 | } | |
563 | ||
564 | static int on_ifjoin_expiry_timer(struct thread *t) | |
565 | { | |
566 | struct pim_ifchannel *ch; | |
567 | ||
12e41d03 | 568 | ch = THREAD_ARG(t); |
12e41d03 | 569 | |
59ba0ac3 | 570 | ch->t_ifjoin_expiry_timer = NULL; |
12e41d03 | 571 | |
12e41d03 DL |
572 | ifjoin_to_noinfo(ch); |
573 | /* ch may have been deleted */ | |
574 | ||
575 | return 0; | |
576 | } | |
577 | ||
12e41d03 DL |
578 | static int on_ifjoin_prune_pending_timer(struct thread *t) |
579 | { | |
580 | struct pim_ifchannel *ch; | |
581 | int send_prune_echo; /* boolean */ | |
582 | struct interface *ifp; | |
583 | struct pim_interface *pim_ifp; | |
12e41d03 | 584 | |
12e41d03 | 585 | ch = THREAD_ARG(t); |
12e41d03 | 586 | |
59ba0ac3 | 587 | ch->t_ifjoin_prune_pending_timer = NULL; |
12e41d03 | 588 | |
1e3a5132 DS |
589 | if (ch->ifjoin_state == PIM_IFJOIN_PRUNE_PENDING) |
590 | { | |
591 | /* Send PruneEcho(S,G) ? */ | |
592 | ifp = ch->interface; | |
593 | pim_ifp = ifp->info; | |
594 | send_prune_echo = (listcount(pim_ifp->pim_neighbor_list) > 1); | |
12e41d03 | 595 | |
1e3a5132 DS |
596 | ifjoin_to_noinfo(ch); |
597 | /* from here ch may have been deleted */ | |
12e41d03 | 598 | |
1e3a5132 | 599 | if (send_prune_echo) |
b5e2377c DS |
600 | { |
601 | struct pim_rpf rpf; | |
602 | ||
603 | rpf.source_nexthop.interface = ifp; | |
604 | rpf.rpf_addr.u.prefix4 = pim_ifp->primary_address; | |
982bff89 | 605 | pim_jp_agg_single_upstream_send(&rpf, ch->upstream, 0); |
b5e2377c | 606 | } |
1e3a5132 DS |
607 | } |
608 | else | |
609 | { | |
610 | zlog_warn("%s: IFCHANNEL%s Prune Pending Timer Popped while in %s state", | |
611 | __PRETTY_FUNCTION__, pim_str_sg_dump (&ch->sg), | |
612 | pim_ifchannel_ifjoin_name (ch->ifjoin_state)); | |
613 | } | |
12e41d03 DL |
614 | |
615 | return 0; | |
616 | } | |
617 | ||
618 | static void check_recv_upstream(int is_join, | |
619 | struct interface *recv_ifp, | |
620 | struct in_addr upstream, | |
4ed0af70 | 621 | struct prefix_sg *sg, |
12e41d03 DL |
622 | uint8_t source_flags, |
623 | int holdtime) | |
624 | { | |
625 | struct pim_upstream *up; | |
626 | ||
627 | /* Upstream (S,G) in Joined state ? */ | |
01d45d04 | 628 | up = pim_upstream_find(sg); |
12e41d03 DL |
629 | if (!up) |
630 | return; | |
631 | if (up->join_state != PIM_UPSTREAM_JOINED) | |
632 | return; | |
633 | ||
634 | /* Upstream (S,G) in Joined state */ | |
635 | ||
63c59d0c | 636 | if (pim_rpf_addr_is_inaddr_any(&up->rpf)) { |
12e41d03 | 637 | /* RPF'(S,G) not found */ |
01d45d04 | 638 | zlog_warn("%s %s: RPF'%s not found", |
12e41d03 | 639 | __FILE__, __PRETTY_FUNCTION__, |
8bfb8b67 | 640 | up->sg_str); |
12e41d03 DL |
641 | return; |
642 | } | |
643 | ||
644 | /* upstream directed to RPF'(S,G) ? */ | |
63c59d0c | 645 | if (upstream.s_addr != up->rpf.rpf_addr.u.prefix4.s_addr) { |
eaa54bdb DW |
646 | char up_str[INET_ADDRSTRLEN]; |
647 | char rpf_str[PREFIX_STRLEN]; | |
12e41d03 | 648 | pim_inet4_dump("<up?>", upstream, up_str, sizeof(up_str)); |
63c59d0c | 649 | pim_addr_dump("<rpf?>", &up->rpf.rpf_addr, rpf_str, sizeof(rpf_str)); |
01d45d04 | 650 | zlog_warn("%s %s: (S,G)=%s upstream=%s not directed to RPF'(S,G)=%s on interface %s", |
12e41d03 | 651 | __FILE__, __PRETTY_FUNCTION__, |
8bfb8b67 | 652 | up->sg_str, |
12e41d03 DL |
653 | up_str, rpf_str, recv_ifp->name); |
654 | return; | |
655 | } | |
656 | /* upstream directed to RPF'(S,G) */ | |
657 | ||
658 | if (is_join) { | |
659 | /* Join(S,G) to RPF'(S,G) */ | |
63c59d0c | 660 | pim_upstream_join_suppress(up, up->rpf.rpf_addr.u.prefix4, holdtime); |
12e41d03 DL |
661 | return; |
662 | } | |
663 | ||
664 | /* Prune to RPF'(S,G) */ | |
665 | ||
666 | if (source_flags & PIM_RPT_BIT_MASK) { | |
667 | if (source_flags & PIM_WILDCARD_BIT_MASK) { | |
668 | /* Prune(*,G) to RPF'(S,G) */ | |
c48a612c | 669 | pim_upstream_join_timer_decrease_to_t_override("Prune(*,G)", up); |
12e41d03 DL |
670 | return; |
671 | } | |
672 | ||
673 | /* Prune(S,G,rpt) to RPF'(S,G) */ | |
c48a612c | 674 | pim_upstream_join_timer_decrease_to_t_override("Prune(S,G,rpt)", up); |
12e41d03 DL |
675 | return; |
676 | } | |
677 | ||
678 | /* Prune(S,G) to RPF'(S,G) */ | |
c48a612c | 679 | pim_upstream_join_timer_decrease_to_t_override("Prune(S,G)", up); |
12e41d03 DL |
680 | } |
681 | ||
116b989a DS |
682 | static int |
683 | nonlocal_upstream(int is_join, | |
684 | struct interface *recv_ifp, | |
685 | struct in_addr upstream, | |
686 | struct prefix_sg *sg, | |
687 | uint8_t source_flags, | |
688 | uint16_t holdtime) | |
12e41d03 DL |
689 | { |
690 | struct pim_interface *recv_pim_ifp; | |
691 | int is_local; /* boolean */ | |
692 | ||
693 | recv_pim_ifp = recv_ifp->info; | |
694 | zassert(recv_pim_ifp); | |
695 | ||
696 | is_local = (upstream.s_addr == recv_pim_ifp->primary_address.s_addr); | |
116b989a DS |
697 | |
698 | if (is_local) | |
699 | return 0; | |
700 | ||
a770ef90 | 701 | if (PIM_DEBUG_PIM_TRACE_DETAIL) { |
eaa54bdb | 702 | char up_str[INET_ADDRSTRLEN]; |
12e41d03 | 703 | pim_inet4_dump("<upstream?>", upstream, up_str, sizeof(up_str)); |
116b989a DS |
704 | zlog_warn("%s: recv %s (S,G)=%s to non-local upstream=%s on %s", |
705 | __PRETTY_FUNCTION__, | |
706 | is_join ? "join" : "prune", | |
707 | pim_str_sg_dump (sg), | |
708 | up_str, recv_ifp->name); | |
12e41d03 DL |
709 | } |
710 | ||
12e41d03 | 711 | /* |
116b989a DS |
712 | * Since recv upstream addr was not directed to our primary |
713 | * address, check if we should react to it in any way. | |
714 | */ | |
01d45d04 | 715 | check_recv_upstream(is_join, recv_ifp, upstream, sg, |
116b989a | 716 | source_flags, holdtime); |
12e41d03 DL |
717 | |
718 | return 1; /* non-local */ | |
719 | } | |
720 | ||
721 | void pim_ifchannel_join_add(struct interface *ifp, | |
722 | struct in_addr neigh_addr, | |
723 | struct in_addr upstream, | |
4ed0af70 | 724 | struct prefix_sg *sg, |
12e41d03 DL |
725 | uint8_t source_flags, |
726 | uint16_t holdtime) | |
727 | { | |
728 | struct pim_interface *pim_ifp; | |
729 | struct pim_ifchannel *ch; | |
730 | ||
731 | if (nonlocal_upstream(1 /* join */, ifp, upstream, | |
01d45d04 | 732 | sg, source_flags, holdtime)) { |
12e41d03 DL |
733 | return; |
734 | } | |
735 | ||
4a40c37a | 736 | ch = pim_ifchannel_add(ifp, sg, PIM_UPSTREAM_FLAG_MASK_SRC_PIM); |
12e41d03 DL |
737 | if (!ch) |
738 | return; | |
739 | ||
740 | /* | |
741 | RFC 4601: 4.6.1. (S,G) Assert Message State Machine | |
742 | ||
743 | Transitions from "I am Assert Loser" State | |
744 | ||
745 | Receive Join(S,G) on Interface I | |
746 | ||
747 | We receive a Join(S,G) that has the Upstream Neighbor Address | |
748 | field set to my primary IP address on interface I. The action is | |
749 | to transition to NoInfo state, delete this (S,G) assert state | |
750 | (Actions A5 below), and allow the normal PIM Join/Prune mechanisms | |
751 | to operate. | |
752 | ||
753 | Notice: The nonlocal_upstream() test above ensures the upstream | |
754 | address of the join message is our primary address. | |
755 | */ | |
756 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { | |
eaa54bdb | 757 | char neigh_str[INET_ADDRSTRLEN]; |
12e41d03 | 758 | pim_inet4_dump("<neigh?>", neigh_addr, neigh_str, sizeof(neigh_str)); |
5074a423 | 759 | zlog_warn("%s: Assert Loser recv Join%s from %s on %s", |
12e41d03 | 760 | __PRETTY_FUNCTION__, |
8bfb8b67 | 761 | ch->sg_str, neigh_str, ifp->name); |
12e41d03 DL |
762 | |
763 | assert_action_a5(ch); | |
764 | } | |
765 | ||
766 | pim_ifp = ifp->info; | |
767 | zassert(pim_ifp); | |
768 | ||
769 | switch (ch->ifjoin_state) { | |
770 | case PIM_IFJOIN_NOINFO: | |
771 | pim_ifchannel_ifjoin_switch(__PRETTY_FUNCTION__, ch, PIM_IFJOIN_JOIN); | |
772 | if (pim_macro_chisin_oiflist(ch)) { | |
5b668dd7 | 773 | pim_upstream_inherited_olist (ch->upstream); |
12e41d03 DL |
774 | pim_forward_start(ch); |
775 | } | |
776 | break; | |
777 | case PIM_IFJOIN_JOIN: | |
778 | zassert(!ch->t_ifjoin_prune_pending_timer); | |
779 | ||
780 | /* | |
781 | In the JOIN state ch->t_ifjoin_expiry_timer may be NULL due to a | |
782 | previously received join message with holdtime=0xFFFF. | |
783 | */ | |
784 | if (ch->t_ifjoin_expiry_timer) { | |
785 | unsigned long remain = | |
786 | thread_timer_remain_second(ch->t_ifjoin_expiry_timer); | |
787 | if (remain > holdtime) { | |
788 | /* | |
789 | RFC 4601: 4.5.3. Receiving (S,G) Join/Prune Messages | |
790 | ||
791 | Transitions from Join State | |
792 | ||
793 | The (S,G) downstream state machine on interface I remains in | |
794 | Join state, and the Expiry Timer (ET) is restarted, set to | |
795 | maximum of its current value and the HoldTime from the | |
796 | triggering Join/Prune message. | |
797 | ||
798 | Conclusion: Do not change the ET if the current value is | |
799 | higher than the received join holdtime. | |
800 | */ | |
801 | return; | |
802 | } | |
803 | } | |
804 | THREAD_OFF(ch->t_ifjoin_expiry_timer); | |
805 | break; | |
be4791f2 | 806 | case PIM_IFJOIN_PRUNE: |
220d8a49 DS |
807 | if (source_flags & PIM_ENCODE_RPT_BIT) |
808 | pim_ifchannel_ifjoin_switch(__PRETTY_FUNCTION__, ch, PIM_IFJOIN_NOINFO); | |
be4791f2 | 809 | break; |
12e41d03 | 810 | case PIM_IFJOIN_PRUNE_PENDING: |
1e3a5132 | 811 | THREAD_OFF(ch->t_ifjoin_prune_pending_timer); |
220d8a49 | 812 | if (source_flags & PIM_ENCODE_RPT_BIT) |
220d8a49 | 813 | { |
1e3a5132 DS |
814 | THREAD_OFF(ch->t_ifjoin_expiry_timer); |
815 | pim_ifchannel_ifjoin_switch(__PRETTY_FUNCTION__, ch, PIM_IFJOIN_NOINFO); | |
220d8a49 | 816 | } |
1e3a5132 DS |
817 | else |
818 | pim_ifchannel_ifjoin_switch(__PRETTY_FUNCTION__, ch, PIM_IFJOIN_JOIN); | |
12e41d03 | 819 | break; |
be4791f2 | 820 | case PIM_IFJOIN_PRUNE_TMP: |
be4791f2 DS |
821 | break; |
822 | case PIM_IFJOIN_PRUNE_PENDING_TMP: | |
be4791f2 | 823 | break; |
12e41d03 DL |
824 | } |
825 | ||
12e41d03 DL |
826 | if (holdtime != 0xFFFF) { |
827 | THREAD_TIMER_ON(master, ch->t_ifjoin_expiry_timer, | |
828 | on_ifjoin_expiry_timer, | |
829 | ch, holdtime); | |
830 | } | |
831 | } | |
832 | ||
833 | void pim_ifchannel_prune(struct interface *ifp, | |
834 | struct in_addr upstream, | |
4ed0af70 | 835 | struct prefix_sg *sg, |
12e41d03 DL |
836 | uint8_t source_flags, |
837 | uint16_t holdtime) | |
838 | { | |
839 | struct pim_ifchannel *ch; | |
1405c852 | 840 | struct pim_interface *pim_ifp; |
12e41d03 DL |
841 | int jp_override_interval_msec; |
842 | ||
843 | if (nonlocal_upstream(0 /* prune */, ifp, upstream, | |
01d45d04 | 844 | sg, source_flags, holdtime)) { |
12e41d03 DL |
845 | return; |
846 | } | |
847 | ||
df90067a DS |
848 | ch = pim_ifchannel_find (ifp, sg); |
849 | if (!ch && !(source_flags & PIM_ENCODE_RPT_BIT)) | |
850 | { | |
851 | if (PIM_DEBUG_TRACE) | |
852 | zlog_debug ("%s: Received prune with no relevant ifchannel %s(%s) state: %d", | |
853 | __PRETTY_FUNCTION__, ifp->name, pim_str_sg_dump (sg), source_flags); | |
854 | return; | |
855 | } | |
856 | ||
4a40c37a | 857 | ch = pim_ifchannel_add(ifp, sg, PIM_UPSTREAM_FLAG_MASK_SRC_PIM); |
12e41d03 DL |
858 | if (!ch) |
859 | return; | |
860 | ||
1405c852 DS |
861 | pim_ifp = ifp->info; |
862 | ||
12e41d03 DL |
863 | switch (ch->ifjoin_state) { |
864 | case PIM_IFJOIN_NOINFO: | |
1405c852 DS |
865 | if (source_flags & PIM_ENCODE_RPT_BIT) |
866 | { | |
867 | PIM_IF_FLAG_SET_S_G_RPT(ch->flags); | |
868 | ch->ifjoin_state = PIM_IFJOIN_PRUNE_PENDING; | |
869 | if (listcount(pim_ifp->pim_neighbor_list) > 1) | |
870 | jp_override_interval_msec = pim_if_jp_override_interval_msec(ifp); | |
871 | else | |
872 | jp_override_interval_msec = 0; /* schedule to expire immediately */ | |
873 | /* If we called ifjoin_prune() directly instead, care should | |
874 | be taken not to use "ch" afterwards since it would be | |
875 | deleted. */ | |
876 | ||
877 | THREAD_OFF(ch->t_ifjoin_prune_pending_timer); | |
878 | THREAD_OFF(ch->t_ifjoin_expiry_timer); | |
879 | THREAD_TIMER_MSEC_ON(master, ch->t_ifjoin_prune_pending_timer, | |
880 | on_ifjoin_prune_pending_timer, | |
881 | ch, jp_override_interval_msec); | |
882 | THREAD_TIMER_ON(master, ch->t_ifjoin_expiry_timer, | |
883 | on_ifjoin_expiry_timer, | |
884 | ch, holdtime); | |
885 | } | |
886 | break; | |
12e41d03 DL |
887 | case PIM_IFJOIN_PRUNE_PENDING: |
888 | /* nothing to do */ | |
889 | break; | |
890 | case PIM_IFJOIN_JOIN: | |
1405c852 | 891 | THREAD_OFF(ch->t_ifjoin_expiry_timer); |
12e41d03 | 892 | |
1405c852 | 893 | pim_ifchannel_ifjoin_switch(__PRETTY_FUNCTION__, ch, PIM_IFJOIN_PRUNE_PENDING); |
12e41d03 | 894 | |
1405c852 DS |
895 | if (listcount(pim_ifp->pim_neighbor_list) > 1) |
896 | jp_override_interval_msec = pim_if_jp_override_interval_msec(ifp); | |
897 | else | |
898 | jp_override_interval_msec = 0; /* schedule to expire immediately */ | |
899 | /* If we called ifjoin_prune() directly instead, care should | |
900 | be taken not to use "ch" afterwards since it would be | |
901 | deleted. */ | |
902 | THREAD_OFF(ch->t_ifjoin_prune_pending_timer); | |
903 | THREAD_TIMER_MSEC_ON(master, ch->t_ifjoin_prune_pending_timer, | |
904 | on_ifjoin_prune_pending_timer, | |
905 | ch, jp_override_interval_msec); | |
12e41d03 | 906 | break; |
be4791f2 | 907 | case PIM_IFJOIN_PRUNE: |
1405c852 DS |
908 | if (source_flags & PIM_ENCODE_RPT_BIT) |
909 | { | |
910 | THREAD_OFF(ch->t_ifjoin_prune_pending_timer); | |
911 | THREAD_TIMER_ON(master, ch->t_ifjoin_expiry_timer, | |
912 | on_ifjoin_expiry_timer, | |
913 | ch, holdtime); | |
914 | } | |
915 | break; | |
be4791f2 | 916 | case PIM_IFJOIN_PRUNE_TMP: |
1405c852 DS |
917 | if (source_flags & PIM_ENCODE_RPT_BIT) |
918 | { | |
919 | ch->ifjoin_state = PIM_IFJOIN_PRUNE; | |
920 | THREAD_OFF(ch->t_ifjoin_expiry_timer); | |
921 | THREAD_TIMER_ON(master, ch->t_ifjoin_expiry_timer, | |
922 | on_ifjoin_expiry_timer, | |
923 | ch, holdtime); | |
924 | } | |
925 | break; | |
be4791f2 | 926 | case PIM_IFJOIN_PRUNE_PENDING_TMP: |
1405c852 DS |
927 | if (source_flags & PIM_ENCODE_RPT_BIT) |
928 | { | |
929 | ch->ifjoin_state = PIM_IFJOIN_PRUNE_PENDING; | |
930 | THREAD_OFF(ch->t_ifjoin_expiry_timer); | |
931 | THREAD_TIMER_ON(master, ch->t_ifjoin_expiry_timer, | |
932 | on_ifjoin_expiry_timer, | |
933 | ch, holdtime); | |
934 | } | |
be4791f2 | 935 | break; |
12e41d03 | 936 | } |
12e41d03 DL |
937 | } |
938 | ||
f663aa7a DS |
939 | int |
940 | pim_ifchannel_local_membership_add(struct interface *ifp, | |
941 | struct prefix_sg *sg) | |
12e41d03 DL |
942 | { |
943 | struct pim_ifchannel *ch; | |
944 | struct pim_interface *pim_ifp; | |
945 | ||
946 | /* PIM enabled on interface? */ | |
947 | pim_ifp = ifp->info; | |
948 | if (!pim_ifp) | |
f663aa7a | 949 | return 0; |
12e41d03 | 950 | if (!PIM_IF_TEST_PIM(pim_ifp->options)) |
f663aa7a | 951 | return 0; |
12e41d03 | 952 | |
4a40c37a | 953 | ch = pim_ifchannel_add(ifp, sg, PIM_UPSTREAM_FLAG_MASK_SRC_IGMP); |
12e41d03 | 954 | if (!ch) { |
f663aa7a | 955 | return 0; |
12e41d03 DL |
956 | } |
957 | ||
958 | ifmembership_set(ch, PIM_IFMEMBERSHIP_INCLUDE); | |
959 | ||
dfbbce1d DS |
960 | if (sg->src.s_addr == INADDR_ANY) |
961 | { | |
962 | struct pim_upstream *up = pim_upstream_find (sg); | |
963 | struct pim_upstream *child; | |
964 | struct listnode *up_node; | |
965 | ||
03417ccd | 966 | for (ALL_LIST_ELEMENTS_RO (up->sources, up_node, child)) |
dfbbce1d | 967 | { |
03417ccd | 968 | if (PIM_DEBUG_EVENTS) |
8bfb8b67 DS |
969 | zlog_debug("%s %s: IGMP (S,G)=%s(%s) from %s", |
970 | __FILE__, __PRETTY_FUNCTION__, | |
971 | child->sg_str, ifp->name, up->sg_str); | |
03417ccd | 972 | |
9f44d042 | 973 | if (pim_upstream_evaluate_join_desired_interface (child, ch)) |
03417ccd | 974 | { |
781a1745 | 975 | pim_channel_add_oif (child->channel_oil, ifp, PIM_OIF_FLAG_PROTO_STAR); |
03417ccd DS |
976 | pim_upstream_switch (child, PIM_UPSTREAM_JOINED); |
977 | } | |
dfbbce1d DS |
978 | } |
979 | } | |
f663aa7a DS |
980 | |
981 | return 1; | |
12e41d03 DL |
982 | } |
983 | ||
984 | void pim_ifchannel_local_membership_del(struct interface *ifp, | |
4ed0af70 | 985 | struct prefix_sg *sg) |
12e41d03 DL |
986 | { |
987 | struct pim_ifchannel *ch; | |
988 | struct pim_interface *pim_ifp; | |
989 | ||
990 | /* PIM enabled on interface? */ | |
991 | pim_ifp = ifp->info; | |
992 | if (!pim_ifp) | |
993 | return; | |
994 | if (!PIM_IF_TEST_PIM(pim_ifp->options)) | |
995 | return; | |
996 | ||
1103466b | 997 | ch = pim_ifchannel_find(ifp, sg); |
12e41d03 DL |
998 | if (!ch) |
999 | return; | |
1000 | ||
1001 | ifmembership_set(ch, PIM_IFMEMBERSHIP_NOINFO); | |
1002 | ||
dfbbce1d DS |
1003 | if (sg->src.s_addr == INADDR_ANY) |
1004 | { | |
1005 | struct pim_upstream *up = pim_upstream_find (sg); | |
1006 | struct pim_upstream *child; | |
1007 | struct listnode *up_node; | |
1008 | ||
03417ccd | 1009 | for (ALL_LIST_ELEMENTS_RO (up->sources, up_node, child)) |
dfbbce1d | 1010 | { |
03417ccd DS |
1011 | struct channel_oil *c_oil = child->channel_oil; |
1012 | struct pim_ifchannel *chchannel = pim_ifchannel_find (ifp, &child->sg); | |
1013 | struct pim_interface *pim_ifp = ifp->info; | |
1014 | ||
1015 | if (PIM_DEBUG_EVENTS) | |
8bfb8b67 DS |
1016 | zlog_debug("%s %s: Prune(S,G)=%s(%s) from %s", |
1017 | __FILE__, __PRETTY_FUNCTION__, | |
1018 | up->sg_str, ifp->name, child->sg_str); | |
03417ccd | 1019 | |
9f44d042 | 1020 | if (c_oil && !pim_upstream_evaluate_join_desired_interface (child, ch)) |
781a1745 | 1021 | pim_channel_del_oif (c_oil, ifp, PIM_OIF_FLAG_PROTO_STAR); |
03417ccd DS |
1022 | |
1023 | /* | |
1024 | * If the S,G has no if channel and the c_oil still | |
1025 | * has output here then the *,G was supplying the implied | |
1026 | * if channel. So remove it. | |
1027 | */ | |
b72f79a9 | 1028 | if (!chchannel && c_oil && c_oil->oil.mfcc_ttls[pim_ifp->mroute_vif_index]) |
781a1745 | 1029 | pim_channel_del_oif (c_oil, ifp, PIM_OIF_FLAG_PROTO_STAR); |
dfbbce1d DS |
1030 | } |
1031 | } | |
12e41d03 DL |
1032 | delete_on_noinfo(ch); |
1033 | } | |
1034 | ||
1035 | void pim_ifchannel_update_could_assert(struct pim_ifchannel *ch) | |
1036 | { | |
1037 | int old_couldassert = PIM_FORCE_BOOLEAN(PIM_IF_FLAG_TEST_COULD_ASSERT(ch->flags)); | |
1038 | int new_couldassert = PIM_FORCE_BOOLEAN(pim_macro_ch_could_assert_eval(ch)); | |
1039 | ||
1040 | if (new_couldassert == old_couldassert) | |
1041 | return; | |
1042 | ||
1043 | if (PIM_DEBUG_PIM_EVENTS) { | |
eaa54bdb DW |
1044 | char src_str[INET_ADDRSTRLEN]; |
1045 | char grp_str[INET_ADDRSTRLEN]; | |
4ed0af70 DS |
1046 | pim_inet4_dump("<src?>", ch->sg.src, src_str, sizeof(src_str)); |
1047 | pim_inet4_dump("<grp?>", ch->sg.grp, grp_str, sizeof(grp_str)); | |
12e41d03 DL |
1048 | zlog_debug("%s: CouldAssert(%s,%s,%s) changed from %d to %d", |
1049 | __PRETTY_FUNCTION__, | |
1050 | src_str, grp_str, ch->interface->name, | |
1051 | old_couldassert, new_couldassert); | |
1052 | } | |
1053 | ||
1054 | if (new_couldassert) { | |
1055 | /* CouldAssert(S,G,I) switched from FALSE to TRUE */ | |
1056 | PIM_IF_FLAG_SET_COULD_ASSERT(ch->flags); | |
1057 | } | |
1058 | else { | |
1059 | /* CouldAssert(S,G,I) switched from TRUE to FALSE */ | |
1060 | PIM_IF_FLAG_UNSET_COULD_ASSERT(ch->flags); | |
1061 | ||
1062 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_WINNER) { | |
1063 | assert_action_a4(ch); | |
1064 | } | |
1065 | } | |
1066 | ||
1067 | pim_ifchannel_update_my_assert_metric(ch); | |
1068 | } | |
1069 | ||
1070 | /* | |
1071 | my_assert_metric may be affected by: | |
1072 | ||
1073 | CouldAssert(S,G) | |
1074 | pim_ifp->primary_address | |
1075 | rpf->source_nexthop.mrib_metric_preference; | |
1076 | rpf->source_nexthop.mrib_route_metric; | |
1077 | */ | |
1078 | void pim_ifchannel_update_my_assert_metric(struct pim_ifchannel *ch) | |
1079 | { | |
1080 | struct pim_assert_metric my_metric_new = pim_macro_ch_my_assert_metric_eval(ch); | |
1081 | ||
1082 | if (pim_assert_metric_match(&my_metric_new, &ch->ifassert_my_metric)) | |
1083 | return; | |
1084 | ||
1085 | if (PIM_DEBUG_PIM_EVENTS) { | |
eaa54bdb DW |
1086 | char src_str[INET_ADDRSTRLEN]; |
1087 | char grp_str[INET_ADDRSTRLEN]; | |
1088 | char old_addr_str[INET_ADDRSTRLEN]; | |
1089 | char new_addr_str[INET_ADDRSTRLEN]; | |
4ed0af70 DS |
1090 | pim_inet4_dump("<src?>", ch->sg.src, src_str, sizeof(src_str)); |
1091 | pim_inet4_dump("<grp?>", ch->sg.grp, grp_str, sizeof(grp_str)); | |
12e41d03 DL |
1092 | pim_inet4_dump("<old_addr?>", ch->ifassert_my_metric.ip_address, old_addr_str, sizeof(old_addr_str)); |
1093 | pim_inet4_dump("<new_addr?>", my_metric_new.ip_address, new_addr_str, sizeof(new_addr_str)); | |
1094 | zlog_debug("%s: my_assert_metric(%s,%s,%s) changed from %u,%u,%u,%s to %u,%u,%u,%s", | |
1095 | __PRETTY_FUNCTION__, | |
1096 | src_str, grp_str, ch->interface->name, | |
1097 | ch->ifassert_my_metric.rpt_bit_flag, | |
1098 | ch->ifassert_my_metric.metric_preference, | |
1099 | ch->ifassert_my_metric.route_metric, | |
1100 | old_addr_str, | |
1101 | my_metric_new.rpt_bit_flag, | |
1102 | my_metric_new.metric_preference, | |
1103 | my_metric_new.route_metric, | |
1104 | new_addr_str); | |
1105 | } | |
1106 | ||
1107 | ch->ifassert_my_metric = my_metric_new; | |
1108 | ||
1109 | if (pim_assert_metric_better(&ch->ifassert_my_metric, | |
1110 | &ch->ifassert_winner_metric)) { | |
1111 | assert_action_a5(ch); | |
1112 | } | |
1113 | } | |
1114 | ||
1115 | void pim_ifchannel_update_assert_tracking_desired(struct pim_ifchannel *ch) | |
1116 | { | |
1117 | int old_atd = PIM_FORCE_BOOLEAN(PIM_IF_FLAG_TEST_ASSERT_TRACKING_DESIRED(ch->flags)); | |
1118 | int new_atd = PIM_FORCE_BOOLEAN(pim_macro_assert_tracking_desired_eval(ch)); | |
1119 | ||
1120 | if (new_atd == old_atd) | |
1121 | return; | |
1122 | ||
1123 | if (PIM_DEBUG_PIM_EVENTS) { | |
eaa54bdb DW |
1124 | char src_str[INET_ADDRSTRLEN]; |
1125 | char grp_str[INET_ADDRSTRLEN]; | |
4ed0af70 DS |
1126 | pim_inet4_dump("<src?>", ch->sg.src, src_str, sizeof(src_str)); |
1127 | pim_inet4_dump("<grp?>", ch->sg.grp, grp_str, sizeof(grp_str)); | |
12e41d03 DL |
1128 | zlog_debug("%s: AssertTrackingDesired(%s,%s,%s) changed from %d to %d", |
1129 | __PRETTY_FUNCTION__, | |
1130 | src_str, grp_str, ch->interface->name, | |
1131 | old_atd, new_atd); | |
1132 | } | |
1133 | ||
1134 | if (new_atd) { | |
1135 | /* AssertTrackingDesired(S,G,I) switched from FALSE to TRUE */ | |
1136 | PIM_IF_FLAG_SET_ASSERT_TRACKING_DESIRED(ch->flags); | |
1137 | } | |
1138 | else { | |
1139 | /* AssertTrackingDesired(S,G,I) switched from TRUE to FALSE */ | |
1140 | PIM_IF_FLAG_UNSET_ASSERT_TRACKING_DESIRED(ch->flags); | |
1141 | ||
1142 | if (ch->ifassert_state == PIM_IFASSERT_I_AM_LOSER) { | |
1143 | assert_action_a5(ch); | |
1144 | } | |
1145 | } | |
1146 | } | |
c8507a16 DS |
1147 | |
1148 | /* | |
1149 | * If we have a new pim interface, check to | |
1150 | * see if any of the pre-existing channels have | |
1151 | * their upstream out that way and turn on forwarding | |
1152 | * for that ifchannel then. | |
1153 | */ | |
1154 | void | |
1155 | pim_ifchannel_scan_forward_start (struct interface *new_ifp) | |
1156 | { | |
1157 | struct listnode *ifnode; | |
1158 | struct interface *ifp; | |
1159 | struct pim_interface *new_pim_ifp = new_ifp->info; | |
1160 | ||
1161 | for (ALL_LIST_ELEMENTS_RO (vrf_iflist (VRF_DEFAULT), ifnode, ifp)) | |
1162 | { | |
1163 | struct pim_interface *loop_pim_ifp = ifp->info; | |
1164 | struct listnode *ch_node; | |
1165 | struct pim_ifchannel *ch; | |
1166 | ||
1167 | if (!loop_pim_ifp) | |
1168 | continue; | |
1169 | ||
1170 | if (new_pim_ifp == loop_pim_ifp) | |
1171 | continue; | |
1172 | ||
1173 | for (ALL_LIST_ELEMENTS_RO (loop_pim_ifp->pim_ifchannel_list, ch_node, ch)) | |
1174 | { | |
1175 | if (ch->ifjoin_state == PIM_IFJOIN_JOIN) | |
1176 | { | |
1177 | struct pim_upstream *up = ch->upstream; | |
1178 | if ((!up->channel_oil) && | |
1179 | (up->rpf.source_nexthop.interface == new_ifp)) | |
1180 | pim_forward_start (ch); | |
1181 | } | |
1182 | } | |
1183 | } | |
1184 | } | |
220d8a49 DS |
1185 | |
1186 | /* | |
1187 | * Downstream per-interface (S,G,rpt) state machine | |
1188 | * states that we need to move (S,G,rpt) items | |
1189 | * into different states at the start of the | |
1190 | * reception of a *,G join as well, when | |
1191 | * we get End of Message | |
1192 | */ | |
1193 | void | |
1194 | pim_ifchannel_set_star_g_join_state (struct pim_ifchannel *ch, int eom) | |
1195 | { | |
1196 | struct pim_ifchannel *child; | |
1197 | struct listnode *ch_node; | |
1198 | ||
1199 | if (PIM_DEBUG_PIM_TRACE) | |
1200 | zlog_debug ("%s: %s %s eom: %d", __PRETTY_FUNCTION__, | |
1201 | pim_ifchannel_ifjoin_name(ch->ifjoin_state), | |
8bfb8b67 | 1202 | ch->sg_str, eom); |
220d8a49 DS |
1203 | if (!ch->sources) |
1204 | return; | |
1205 | ||
1206 | for (ALL_LIST_ELEMENTS_RO (ch->sources, ch_node, child)) | |
1207 | { | |
1208 | if (!PIM_IF_FLAG_TEST_S_G_RPT(child->flags)) | |
1209 | continue; | |
1210 | ||
1211 | switch (child->ifjoin_state) | |
1405c852 DS |
1212 | { |
1213 | case PIM_IFJOIN_NOINFO: | |
1214 | case PIM_IFJOIN_JOIN: | |
1215 | break; | |
1216 | case PIM_IFJOIN_PRUNE: | |
1217 | if (!eom) | |
1218 | child->ifjoin_state = PIM_IFJOIN_PRUNE_TMP; | |
1219 | break; | |
1220 | case PIM_IFJOIN_PRUNE_PENDING: | |
1221 | if (!eom) | |
1222 | child->ifjoin_state = PIM_IFJOIN_PRUNE_PENDING_TMP; | |
1223 | break; | |
1224 | case PIM_IFJOIN_PRUNE_TMP: | |
1225 | case PIM_IFJOIN_PRUNE_PENDING_TMP: | |
1226 | if (eom) | |
1227 | child->ifjoin_state = PIM_IFJOIN_NOINFO; | |
1228 | break; | |
1229 | } | |
220d8a49 DS |
1230 | } |
1231 | } | |
a625e937 DS |
1232 | |
1233 | unsigned int | |
1234 | pim_ifchannel_hash_key (void *arg) | |
1235 | { | |
1236 | struct pim_ifchannel *ch = (struct pim_ifchannel *)arg; | |
1237 | ||
1238 | return jhash_2words (ch->sg.src.s_addr, ch->sg.grp.s_addr, 0); | |
1239 | } | |
1240 | ||
1241 | int | |
1242 | pim_ifchannel_equal (const void *arg1, const void *arg2) | |
1243 | { | |
1244 | const struct pim_ifchannel *ch1 = (const struct pim_ifchannel *)arg1; | |
1245 | const struct pim_ifchannel *ch2 = (const struct pim_ifchannel *)arg2; | |
1246 | ||
1247 | if ((ch1->sg.grp.s_addr == ch2->sg.grp.s_addr) && | |
1248 | (ch1->sg.src.s_addr == ch2->sg.src.s_addr)) | |
1249 | return 1; | |
1250 | ||
1251 | return 0; | |
1252 | } |