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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 "zebra/rib.h" | |
23 | ||
24 | #include "if.h" | |
25 | #include "log.h" | |
26 | #include "prefix.h" | |
27 | #include "zclient.h" | |
28 | #include "stream.h" | |
29 | #include "network.h" | |
dfe43e25 DW |
30 | #include "vty.h" |
31 | #include "plist.h" | |
ba4eb1bc | 32 | #include "lib/bfd.h" |
12e41d03 DL |
33 | |
34 | #include "pimd.h" | |
35 | #include "pim_pim.h" | |
36 | #include "pim_zebra.h" | |
37 | #include "pim_iface.h" | |
38 | #include "pim_str.h" | |
39 | #include "pim_oil.h" | |
40 | #include "pim_rpf.h" | |
41 | #include "pim_time.h" | |
42 | #include "pim_join.h" | |
43 | #include "pim_zlookup.h" | |
44 | #include "pim_ifchannel.h" | |
8f5f5e91 | 45 | #include "pim_rp.h" |
2560106c | 46 | #include "pim_igmpv3.h" |
982bff89 | 47 | #include "pim_jp_agg.h" |
1bc98276 | 48 | #include "pim_nht.h" |
15a5dafe | 49 | #include "pim_ssm.h" |
12e41d03 DL |
50 | |
51 | #undef PIM_DEBUG_IFADDR_DUMP | |
52 | #define PIM_DEBUG_IFADDR_DUMP | |
53 | ||
38f4935a DS |
54 | static struct zclient *zclient = NULL; |
55 | ||
12e41d03 | 56 | |
12e41d03 DL |
57 | /* Router-id update message from zebra. */ |
58 | static int pim_router_id_update_zebra(int command, struct zclient *zclient, | |
469351b3 | 59 | zebra_size_t length, vrf_id_t vrf_id) |
12e41d03 | 60 | { |
d62a17ae | 61 | struct prefix router_id; |
12e41d03 | 62 | |
d62a17ae | 63 | zebra_router_id_update_read(zclient->ibuf, &router_id); |
12e41d03 | 64 | |
d62a17ae | 65 | return 0; |
12e41d03 DL |
66 | } |
67 | ||
68 | static int pim_zebra_if_add(int command, struct zclient *zclient, | |
469351b3 | 69 | zebra_size_t length, vrf_id_t vrf_id) |
12e41d03 | 70 | { |
d62a17ae | 71 | struct interface *ifp; |
72 | ||
73 | /* | |
74 | zebra api adds/dels interfaces using the same call | |
75 | interface_add_read below, see comments in lib/zclient.c | |
76 | */ | |
77 | ifp = zebra_interface_add_read(zclient->ibuf, vrf_id); | |
78 | if (!ifp) | |
79 | return 0; | |
80 | ||
81 | if (PIM_DEBUG_ZEBRA) { | |
82 | zlog_debug( | |
e0ae31b8 DS |
83 | "%s: %s index %d(%d) flags %ld metric %d mtu %d operative %d", |
84 | __PRETTY_FUNCTION__, ifp->name, ifp->ifindex, vrf_id, | |
d62a17ae | 85 | (long)ifp->flags, ifp->metric, ifp->mtu, |
86 | if_is_operative(ifp)); | |
87 | } | |
88 | ||
89 | if (if_is_operative(ifp)) | |
90 | pim_if_addr_add_all(ifp); | |
91 | ||
90133de6 DS |
92 | /* |
93 | * If we are a vrf device that is up, open up the pim_socket for | |
94 | * listening | |
95 | * to incoming pim messages irrelevant if the user has configured us | |
96 | * for pim or not. | |
97 | */ | |
98 | if (pim_if_is_vrf_device(ifp)) { | |
99 | struct pim_interface *pim_ifp; | |
100 | ||
101 | if (!ifp->info) { | |
102 | pim_ifp = pim_if_new(ifp, 0, 0); | |
103 | ifp->info = pim_ifp; | |
104 | } | |
105 | ||
106 | pim_sock_add(ifp); | |
107 | } | |
108 | ||
d62a17ae | 109 | return 0; |
12e41d03 DL |
110 | } |
111 | ||
112 | static int pim_zebra_if_del(int command, struct zclient *zclient, | |
469351b3 | 113 | zebra_size_t length, vrf_id_t vrf_id) |
12e41d03 | 114 | { |
d62a17ae | 115 | struct interface *ifp; |
116 | ||
117 | /* | |
118 | zebra api adds/dels interfaces using the same call | |
119 | interface_add_read below, see comments in lib/zclient.c | |
120 | ||
121 | comments in lib/zclient.c seem to indicate that calling | |
122 | zebra_interface_add_read is the correct call, but that | |
123 | results in an attemted out of bounds read which causes | |
124 | pimd to assert. Other clients use zebra_interface_state_read | |
125 | and it appears to work just fine. | |
126 | */ | |
127 | ifp = zebra_interface_state_read(zclient->ibuf, vrf_id); | |
128 | if (!ifp) | |
129 | return 0; | |
130 | ||
131 | if (PIM_DEBUG_ZEBRA) { | |
132 | zlog_debug( | |
e0ae31b8 DS |
133 | "%s: %s index %d(%d) flags %ld metric %d mtu %d operative %d", |
134 | __PRETTY_FUNCTION__, ifp->name, ifp->ifindex, vrf_id, | |
d62a17ae | 135 | (long)ifp->flags, ifp->metric, ifp->mtu, |
136 | if_is_operative(ifp)); | |
137 | } | |
138 | ||
139 | if (!if_is_operative(ifp)) | |
140 | pim_if_addr_del_all(ifp); | |
141 | ||
142 | return 0; | |
12e41d03 DL |
143 | } |
144 | ||
145 | static int pim_zebra_if_state_up(int command, struct zclient *zclient, | |
469351b3 | 146 | zebra_size_t length, vrf_id_t vrf_id) |
12e41d03 | 147 | { |
d62a17ae | 148 | struct interface *ifp; |
e0ae31b8 | 149 | uint32_t table_id; |
d62a17ae | 150 | |
151 | /* | |
152 | zebra api notifies interface up/down events by using the same call | |
153 | zebra_interface_state_read below, see comments in lib/zclient.c | |
154 | */ | |
155 | ifp = zebra_interface_state_read(zclient->ibuf, vrf_id); | |
156 | if (!ifp) | |
157 | return 0; | |
158 | ||
159 | if (PIM_DEBUG_ZEBRA) { | |
160 | zlog_debug( | |
e0ae31b8 DS |
161 | "%s: %s index %d(%d) flags %ld metric %d mtu %d operative %d", |
162 | __PRETTY_FUNCTION__, ifp->name, ifp->ifindex, vrf_id, | |
d62a17ae | 163 | (long)ifp->flags, ifp->metric, ifp->mtu, |
164 | if_is_operative(ifp)); | |
165 | } | |
166 | ||
167 | if (if_is_operative(ifp)) { | |
168 | /* | |
169 | pim_if_addr_add_all() suffices for bringing up both IGMP and | |
170 | PIM | |
171 | */ | |
172 | pim_if_addr_add_all(ifp); | |
173 | } | |
174 | ||
e0ae31b8 DS |
175 | /* |
176 | * If we have a pimreg device callback and it's for a specific | |
177 | * table set the master appropriately | |
178 | */ | |
179 | if (sscanf(ifp->name, "pimreg%d", &table_id) == 1) { | |
180 | struct vrf *vrf; | |
a2addae8 | 181 | RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) { |
e0ae31b8 DS |
182 | if ((table_id == vrf->data.l.table_id) |
183 | && (ifp->vrf_id != vrf->vrf_id)) { | |
184 | struct interface *master = if_lookup_by_name( | |
185 | vrf->name, vrf->vrf_id); | |
e691f179 DS |
186 | |
187 | if (!master) { | |
188 | zlog_debug("%s: Unable to find Master interface for %s", | |
189 | __PRETTY_FUNCTION__, | |
190 | vrf->name); | |
191 | return 0; | |
192 | } | |
e0ae31b8 DS |
193 | zclient_interface_set_master(zclient, master, |
194 | ifp); | |
195 | } | |
196 | } | |
197 | } | |
d62a17ae | 198 | return 0; |
12e41d03 DL |
199 | } |
200 | ||
201 | static int pim_zebra_if_state_down(int command, struct zclient *zclient, | |
469351b3 | 202 | zebra_size_t length, vrf_id_t vrf_id) |
12e41d03 | 203 | { |
d62a17ae | 204 | struct interface *ifp; |
205 | ||
206 | /* | |
207 | zebra api notifies interface up/down events by using the same call | |
208 | zebra_interface_state_read below, see comments in lib/zclient.c | |
209 | */ | |
210 | ifp = zebra_interface_state_read(zclient->ibuf, vrf_id); | |
211 | if (!ifp) | |
212 | return 0; | |
213 | ||
214 | if (PIM_DEBUG_ZEBRA) { | |
215 | zlog_debug( | |
e0ae31b8 DS |
216 | "%s: %s index %d(%d) flags %ld metric %d mtu %d operative %d", |
217 | __PRETTY_FUNCTION__, ifp->name, ifp->ifindex, vrf_id, | |
d62a17ae | 218 | (long)ifp->flags, ifp->metric, ifp->mtu, |
219 | if_is_operative(ifp)); | |
220 | } | |
221 | ||
222 | if (!if_is_operative(ifp)) { | |
223 | pim_ifchannel_delete_all(ifp); | |
224 | /* | |
225 | pim_if_addr_del_all() suffices for shutting down IGMP, | |
226 | but not for shutting down PIM | |
227 | */ | |
228 | pim_if_addr_del_all(ifp); | |
229 | ||
230 | /* | |
231 | pim_sock_delete() closes the socket, stops read and timer | |
232 | threads, | |
233 | and kills all neighbors. | |
234 | */ | |
235 | if (ifp->info) { | |
236 | pim_sock_delete(ifp, "link down"); | |
237 | } | |
238 | } | |
239 | ||
240 | if (ifp->info) | |
241 | pim_if_del_vif(ifp); | |
242 | ||
243 | return 0; | |
12e41d03 DL |
244 | } |
245 | ||
246 | #ifdef PIM_DEBUG_IFADDR_DUMP | |
247 | static void dump_if_address(struct interface *ifp) | |
248 | { | |
d62a17ae | 249 | struct connected *ifc; |
250 | struct listnode *node; | |
251 | ||
252 | zlog_debug("%s %s: interface %s addresses:", __FILE__, | |
253 | __PRETTY_FUNCTION__, ifp->name); | |
254 | ||
255 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc)) { | |
256 | struct prefix *p = ifc->address; | |
257 | ||
258 | if (p->family != AF_INET) | |
259 | continue; | |
260 | ||
261 | zlog_debug("%s %s: interface %s address %s %s", __FILE__, | |
262 | __PRETTY_FUNCTION__, ifp->name, | |
263 | inet_ntoa(p->u.prefix4), | |
264 | CHECK_FLAG(ifc->flags, ZEBRA_IFA_SECONDARY) | |
265 | ? "secondary" | |
266 | : "primary"); | |
267 | } | |
12e41d03 DL |
268 | } |
269 | #endif | |
270 | ||
271 | static int pim_zebra_if_address_add(int command, struct zclient *zclient, | |
469351b3 | 272 | zebra_size_t length, vrf_id_t vrf_id) |
12e41d03 | 273 | { |
d62a17ae | 274 | struct connected *c; |
275 | struct prefix *p; | |
276 | struct pim_interface *pim_ifp; | |
277 | ||
278 | /* | |
279 | zebra api notifies address adds/dels events by using the same call | |
280 | interface_add_read below, see comments in lib/zclient.c | |
281 | ||
282 | zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_ADD, ...) | |
283 | will add address to interface list by calling | |
284 | connected_add_by_prefix() | |
285 | */ | |
286 | c = zebra_interface_address_read(command, zclient->ibuf, vrf_id); | |
287 | if (!c) | |
288 | return 0; | |
289 | ||
290 | pim_ifp = c->ifp->info; | |
291 | p = c->address; | |
292 | ||
293 | if (PIM_DEBUG_ZEBRA) { | |
294 | char buf[BUFSIZ]; | |
295 | prefix2str(p, buf, BUFSIZ); | |
e0ae31b8 DS |
296 | zlog_debug("%s: %s(%d) connected IP address %s flags %u %s", |
297 | __PRETTY_FUNCTION__, c->ifp->name, vrf_id, buf, | |
298 | c->flags, CHECK_FLAG(c->flags, ZEBRA_IFA_SECONDARY) | |
299 | ? "secondary" | |
300 | : "primary"); | |
d62a17ae | 301 | |
12e41d03 | 302 | #ifdef PIM_DEBUG_IFADDR_DUMP |
d62a17ae | 303 | dump_if_address(c->ifp); |
12e41d03 | 304 | #endif |
d62a17ae | 305 | } |
12e41d03 | 306 | |
d62a17ae | 307 | if (!CHECK_FLAG(c->flags, ZEBRA_IFA_SECONDARY)) { |
308 | /* trying to add primary address */ | |
12e41d03 | 309 | |
d62a17ae | 310 | struct in_addr primary_addr = pim_find_primary_addr(c->ifp); |
311 | if (p->family != AF_INET | |
312 | || primary_addr.s_addr != p->u.prefix4.s_addr) { | |
313 | if (PIM_DEBUG_ZEBRA) { | |
314 | /* but we had a primary address already */ | |
12e41d03 | 315 | |
d62a17ae | 316 | char buf[BUFSIZ]; |
12e41d03 | 317 | |
d62a17ae | 318 | prefix2str(p, buf, BUFSIZ); |
12e41d03 | 319 | |
d62a17ae | 320 | zlog_warn( |
321 | "%s: %s : forcing secondary flag on %s", | |
322 | __PRETTY_FUNCTION__, c->ifp->name, buf); | |
323 | } | |
324 | SET_FLAG(c->flags, ZEBRA_IFA_SECONDARY); | |
325 | } | |
326 | } | |
12e41d03 | 327 | |
d62a17ae | 328 | pim_if_addr_add(c); |
329 | if (pim_ifp) | |
330 | pim_rp_check_on_if_add(pim_ifp); | |
12e41d03 | 331 | |
d62a17ae | 332 | if (if_is_loopback(c->ifp)) { |
f4e14fdb | 333 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
d62a17ae | 334 | struct interface *ifp; |
d8424057 | 335 | |
451fda4f | 336 | FOR_ALL_INTERFACES (vrf, ifp) { |
d62a17ae | 337 | if (!if_is_loopback(ifp) && if_is_operative(ifp)) |
338 | pim_if_addr_add_all(ifp); | |
339 | } | |
340 | } | |
d8424057 | 341 | |
d62a17ae | 342 | return 0; |
12e41d03 DL |
343 | } |
344 | ||
345 | static int pim_zebra_if_address_del(int command, struct zclient *client, | |
469351b3 | 346 | zebra_size_t length, vrf_id_t vrf_id) |
12e41d03 | 347 | { |
d62a17ae | 348 | struct connected *c; |
349 | struct prefix *p; | |
fec883d9 | 350 | struct vrf *vrf = vrf_lookup_by_id(vrf_id); |
819f099b DS |
351 | struct pim_instance *pim; |
352 | ||
353 | if (!vrf) | |
354 | return 0; | |
355 | pim = vrf->info; | |
d62a17ae | 356 | |
357 | /* | |
358 | zebra api notifies address adds/dels events by using the same call | |
359 | interface_add_read below, see comments in lib/zclient.c | |
360 | ||
361 | zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_DELETE, ...) | |
362 | will remove address from interface list by calling | |
363 | connected_delete_by_prefix() | |
364 | */ | |
365 | c = zebra_interface_address_read(command, client->ibuf, vrf_id); | |
366 | if (!c) | |
367 | return 0; | |
368 | ||
369 | p = c->address; | |
370 | if (p->family == AF_INET) { | |
371 | if (PIM_DEBUG_ZEBRA) { | |
372 | char buf[BUFSIZ]; | |
373 | prefix2str(p, buf, BUFSIZ); | |
374 | zlog_debug( | |
e0ae31b8 DS |
375 | "%s: %s(%d) disconnected IP address %s flags %u %s", |
376 | __PRETTY_FUNCTION__, c->ifp->name, vrf_id, buf, | |
d62a17ae | 377 | c->flags, |
378 | CHECK_FLAG(c->flags, ZEBRA_IFA_SECONDARY) | |
379 | ? "secondary" | |
380 | : "primary"); | |
6233f087 | 381 | |
12e41d03 | 382 | #ifdef PIM_DEBUG_IFADDR_DUMP |
d62a17ae | 383 | dump_if_address(c->ifp); |
12e41d03 | 384 | #endif |
d62a17ae | 385 | } |
12e41d03 | 386 | |
d62a17ae | 387 | pim_if_addr_del(c, 0); |
fec883d9 DS |
388 | pim_rp_setup(pim); |
389 | pim_i_am_rp_re_evaluate(pim); | |
d62a17ae | 390 | } |
6233f087 | 391 | |
d62a17ae | 392 | connected_free(c); |
393 | return 0; | |
12e41d03 DL |
394 | } |
395 | ||
396 | static void scan_upstream_rpf_cache() | |
397 | { | |
d62a17ae | 398 | struct listnode *up_node; |
d62a17ae | 399 | struct listnode *up_nextnode; |
400 | struct listnode *node; | |
401 | struct pim_upstream *up; | |
402 | struct interface *ifp; | |
9b29ea95 DS |
403 | struct vrf *vrf; |
404 | struct pim_instance *pim; | |
d62a17ae | 405 | |
a2addae8 | 406 | RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) { |
9b29ea95 DS |
407 | pim = vrf->info; |
408 | if (!pim) | |
409 | continue; | |
d62a17ae | 410 | |
9b29ea95 DS |
411 | for (ALL_LIST_ELEMENTS(pim->upstream_list, up_node, up_nextnode, |
412 | up)) { | |
413 | enum pim_rpf_result rpf_result; | |
414 | struct pim_rpf old; | |
415 | struct prefix nht_p; | |
d62a17ae | 416 | |
9b29ea95 DS |
417 | nht_p.family = AF_INET; |
418 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
419 | nht_p.u.prefix4.s_addr = up->upstream_addr.s_addr; | |
420 | pim_resolve_upstream_nh(pim, &nht_p); | |
d62a17ae | 421 | |
9b29ea95 DS |
422 | old.source_nexthop.interface = |
423 | up->rpf.source_nexthop.interface; | |
424 | old.source_nexthop.nbr = up->rpf.source_nexthop.nbr; | |
2002dcdb | 425 | rpf_result = pim_rpf_update(pim, up, &old, 0); |
d62a17ae | 426 | |
9b29ea95 DS |
427 | if (rpf_result == PIM_RPF_FAILURE) |
428 | continue; | |
d62a17ae | 429 | |
9b29ea95 DS |
430 | if (rpf_result == PIM_RPF_CHANGED) { |
431 | struct pim_neighbor *nbr; | |
d62a17ae | 432 | |
9b29ea95 DS |
433 | nbr = pim_neighbor_find( |
434 | old.source_nexthop.interface, | |
435 | old.rpf_addr.u.prefix4); | |
436 | if (nbr) | |
437 | pim_jp_agg_remove_group( | |
438 | nbr->upstream_jp_agg, up); | |
d62a17ae | 439 | |
440 | /* | |
9b29ea95 DS |
441 | * We have detected a case where we might need |
442 | * to rescan | |
443 | * the inherited o_list so do it. | |
d62a17ae | 444 | */ |
9b29ea95 DS |
445 | if (up->channel_oil->oil_inherited_rescan) { |
446 | pim_upstream_inherited_olist_decide(pim, | |
447 | up); | |
448 | up->channel_oil->oil_inherited_rescan = | |
449 | 0; | |
450 | } | |
451 | ||
452 | if (up->join_state == PIM_UPSTREAM_JOINED) { | |
453 | /* | |
454 | * If we come up real fast we can be | |
455 | * here | |
456 | * where the mroute has not been | |
457 | * installed | |
458 | * so install it. | |
459 | */ | |
460 | if (!up->channel_oil->installed) | |
461 | pim_mroute_add( | |
462 | up->channel_oil, | |
463 | __PRETTY_FUNCTION__); | |
464 | ||
465 | /* | |
466 | * RFC 4601: 4.5.7. Sending (S,G) | |
467 | * Join/Prune Messages | |
468 | * | |
469 | * Transitions from Joined State | |
470 | * | |
471 | * RPF'(S,G) changes not due to an | |
472 | * Assert | |
473 | * | |
474 | * The upstream (S,G) state machine | |
475 | * remains in Joined | |
476 | * state. Send Join(S,G) to the new | |
477 | * upstream neighbor, which is | |
478 | * the new value of RPF'(S,G). Send | |
479 | * Prune(S,G) to the old | |
480 | * upstream neighbor, which is the old | |
481 | * value of RPF'(S,G). Set | |
482 | * the Join Timer (JT) to expire after | |
483 | * t_periodic seconds. | |
484 | */ | |
485 | pim_jp_agg_switch_interface( | |
486 | &old, &up->rpf, up); | |
487 | ||
488 | pim_upstream_join_timer_restart(up, | |
489 | &old); | |
490 | } /* up->join_state == PIM_UPSTREAM_JOINED */ | |
491 | ||
492 | /* FIXME can join_desired actually be changed by | |
493 | pim_rpf_update() | |
494 | returning PIM_RPF_CHANGED ? */ | |
495 | pim_upstream_update_join_desired(pim, up); | |
496 | ||
497 | } /* PIM_RPF_CHANGED */ | |
498 | ||
499 | } /* for (qpim_upstream_list) */ | |
500 | } | |
d62a17ae | 501 | |
a2addae8 | 502 | RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) { |
9b29ea95 DS |
503 | pim = vrf->info; |
504 | if (!pim) | |
505 | continue; | |
d62a17ae | 506 | |
451fda4f | 507 | FOR_ALL_INTERFACES (pim->vrf, ifp) |
9b29ea95 DS |
508 | if (ifp->info) { |
509 | struct pim_interface *pim_ifp = ifp->info; | |
510 | struct pim_iface_upstream_switch *us; | |
d62a17ae | 511 | |
9b29ea95 DS |
512 | for (ALL_LIST_ELEMENTS_RO( |
513 | pim_ifp->upstream_switch_list, | |
514 | node, us)) { | |
515 | struct pim_rpf rpf; | |
516 | rpf.source_nexthop.interface = ifp; | |
517 | rpf.rpf_addr.u.prefix4 = us->address; | |
518 | pim_joinprune_send(&rpf, us->us); | |
519 | pim_jp_agg_clear_group(us->us); | |
520 | } | |
d62a17ae | 521 | } |
9b29ea95 | 522 | } |
12e41d03 DL |
523 | } |
524 | ||
d62a17ae | 525 | void pim_scan_individual_oil(struct channel_oil *c_oil, int in_vif_index) |
12e41d03 | 526 | { |
d62a17ae | 527 | struct in_addr vif_source; |
528 | int input_iface_vif_index; | |
529 | int old_vif_index; | |
530 | ||
d9c9a9ee DS |
531 | if (!pim_rp_set_upstream_addr(c_oil->pim, &vif_source, |
532 | c_oil->oil.mfcc_origin, | |
d62a17ae | 533 | c_oil->oil.mfcc_mcastgrp)) |
534 | return; | |
535 | ||
536 | if (in_vif_index) | |
537 | input_iface_vif_index = in_vif_index; | |
538 | else { | |
539 | struct prefix src, grp; | |
540 | ||
541 | src.family = AF_INET; | |
542 | src.prefixlen = IPV4_MAX_BITLEN; | |
543 | src.u.prefix4 = vif_source; | |
544 | grp.family = AF_INET; | |
545 | grp.prefixlen = IPV4_MAX_BITLEN; | |
546 | grp.u.prefix4 = c_oil->oil.mfcc_mcastgrp; | |
547 | ||
548 | if (PIM_DEBUG_ZEBRA) { | |
549 | char source_str[INET_ADDRSTRLEN]; | |
550 | char group_str[INET_ADDRSTRLEN]; | |
551 | pim_inet4_dump("<source?>", c_oil->oil.mfcc_origin, | |
552 | source_str, sizeof(source_str)); | |
553 | pim_inet4_dump("<group?>", c_oil->oil.mfcc_mcastgrp, | |
554 | group_str, sizeof(group_str)); | |
555 | zlog_debug( | |
a895ac30 | 556 | "%s: channel_oil (%s,%s) upstream info is not present.", |
d62a17ae | 557 | __PRETTY_FUNCTION__, source_str, group_str); |
558 | } | |
559 | input_iface_vif_index = pim_ecmp_fib_lookup_if_vif_index( | |
25b787a2 | 560 | c_oil->pim, vif_source, &src, &grp); |
d62a17ae | 561 | } |
562 | ||
563 | if (input_iface_vif_index < 1) { | |
564 | if (PIM_DEBUG_ZEBRA) { | |
565 | char source_str[INET_ADDRSTRLEN]; | |
566 | char group_str[INET_ADDRSTRLEN]; | |
567 | pim_inet4_dump("<source?>", c_oil->oil.mfcc_origin, | |
568 | source_str, sizeof(source_str)); | |
569 | pim_inet4_dump("<group?>", c_oil->oil.mfcc_mcastgrp, | |
570 | group_str, sizeof(group_str)); | |
571 | zlog_debug( | |
572 | "%s %s: could not find input interface(%d) for (S,G)=(%s,%s)", | |
573 | __FILE__, __PRETTY_FUNCTION__, | |
574 | c_oil->oil.mfcc_parent, source_str, group_str); | |
575 | } | |
576 | pim_mroute_del(c_oil, __PRETTY_FUNCTION__); | |
577 | return; | |
578 | } | |
579 | ||
580 | if (input_iface_vif_index == c_oil->oil.mfcc_parent) { | |
581 | if (!c_oil->installed) | |
582 | pim_mroute_add(c_oil, __PRETTY_FUNCTION__); | |
583 | ||
584 | /* RPF unchanged */ | |
585 | return; | |
586 | } | |
587 | ||
588 | if (PIM_DEBUG_ZEBRA) { | |
7cfc7bcf DS |
589 | struct interface *old_iif = pim_if_find_by_vif_index( |
590 | c_oil->pim, c_oil->oil.mfcc_parent); | |
591 | struct interface *new_iif = pim_if_find_by_vif_index( | |
592 | c_oil->pim, input_iface_vif_index); | |
d62a17ae | 593 | char source_str[INET_ADDRSTRLEN]; |
594 | char group_str[INET_ADDRSTRLEN]; | |
595 | pim_inet4_dump("<source?>", c_oil->oil.mfcc_origin, source_str, | |
596 | sizeof(source_str)); | |
597 | pim_inet4_dump("<group?>", c_oil->oil.mfcc_mcastgrp, group_str, | |
598 | sizeof(group_str)); | |
599 | zlog_debug( | |
600 | "%s %s: (S,G)=(%s,%s) input interface changed from %s vif_index=%d to %s vif_index=%d", | |
601 | __FILE__, __PRETTY_FUNCTION__, source_str, group_str, | |
97f03dde DS |
602 | (old_iif) ? old_iif->name : "<old_iif?>", |
603 | c_oil->oil.mfcc_parent, | |
604 | (new_iif) ? new_iif->name : "<new_iif?>", | |
d62a17ae | 605 | input_iface_vif_index); |
606 | } | |
607 | ||
608 | /* new iif loops to existing oif ? */ | |
609 | if (c_oil->oil.mfcc_ttls[input_iface_vif_index]) { | |
7cfc7bcf DS |
610 | struct interface *new_iif = pim_if_find_by_vif_index( |
611 | c_oil->pim, input_iface_vif_index); | |
d62a17ae | 612 | |
613 | if (PIM_DEBUG_ZEBRA) { | |
614 | char source_str[INET_ADDRSTRLEN]; | |
615 | char group_str[INET_ADDRSTRLEN]; | |
616 | pim_inet4_dump("<source?>", c_oil->oil.mfcc_origin, | |
617 | source_str, sizeof(source_str)); | |
618 | pim_inet4_dump("<group?>", c_oil->oil.mfcc_mcastgrp, | |
619 | group_str, sizeof(group_str)); | |
620 | zlog_debug( | |
621 | "%s %s: (S,G)=(%s,%s) new iif loops to existing oif: %s vif_index=%d", | |
622 | __FILE__, __PRETTY_FUNCTION__, source_str, | |
97f03dde DS |
623 | group_str, |
624 | (new_iif) ? new_iif->name : "<new_iif?>", | |
d62a17ae | 625 | input_iface_vif_index); |
626 | } | |
627 | } | |
628 | ||
629 | /* update iif vif_index */ | |
630 | old_vif_index = c_oil->oil.mfcc_parent; | |
631 | c_oil->oil.mfcc_parent = input_iface_vif_index; | |
632 | ||
633 | /* update kernel multicast forwarding cache (MFC) */ | |
634 | if (pim_mroute_add(c_oil, __PRETTY_FUNCTION__)) { | |
635 | if (PIM_DEBUG_MROUTE) { | |
636 | /* just log warning */ | |
7cfc7bcf DS |
637 | struct interface *old_iif = pim_if_find_by_vif_index( |
638 | c_oil->pim, old_vif_index); | |
639 | struct interface *new_iif = pim_if_find_by_vif_index( | |
640 | c_oil->pim, input_iface_vif_index); | |
d62a17ae | 641 | char source_str[INET_ADDRSTRLEN]; |
642 | char group_str[INET_ADDRSTRLEN]; | |
643 | pim_inet4_dump("<source?>", c_oil->oil.mfcc_origin, | |
644 | source_str, sizeof(source_str)); | |
645 | pim_inet4_dump("<group?>", c_oil->oil.mfcc_mcastgrp, | |
646 | group_str, sizeof(group_str)); | |
647 | zlog_debug( | |
648 | "%s %s: (S,G)=(%s,%s) failure updating input interface from %s vif_index=%d to %s vif_index=%d", | |
649 | __FILE__, __PRETTY_FUNCTION__, source_str, | |
650 | group_str, | |
651 | old_iif ? old_iif->name : "<old_iif?>", | |
652 | c_oil->oil.mfcc_parent, | |
653 | new_iif ? new_iif->name : "<new_iif?>", | |
654 | input_iface_vif_index); | |
655 | } | |
656 | } | |
8a67a996 DS |
657 | } |
658 | ||
c68ba0d7 | 659 | void pim_scan_oil(struct pim_instance *pim_matcher) |
8a67a996 | 660 | { |
d62a17ae | 661 | struct listnode *node; |
662 | struct listnode *nextnode; | |
663 | struct channel_oil *c_oil; | |
664 | ifindex_t ifindex; | |
665 | int vif_index = 0; | |
611925dc DS |
666 | struct vrf *vrf; |
667 | struct pim_instance *pim; | |
d62a17ae | 668 | |
669 | qpim_scan_oil_last = pim_time_monotonic_sec(); | |
670 | ++qpim_scan_oil_events; | |
671 | ||
a2addae8 | 672 | RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) { |
611925dc DS |
673 | pim = vrf->info; |
674 | if (!pim) | |
675 | continue; | |
676 | ||
c68ba0d7 DS |
677 | if (pim_matcher && pim != pim_matcher) |
678 | continue; | |
679 | ||
611925dc DS |
680 | for (ALL_LIST_ELEMENTS(pim->channel_oil_list, node, nextnode, |
681 | c_oil)) { | |
682 | if (c_oil->up | |
683 | && c_oil->up->rpf.source_nexthop.interface) { | |
684 | ifindex = c_oil->up->rpf.source_nexthop | |
685 | .interface->ifindex; | |
686 | vif_index = pim_if_find_vifindex_by_ifindex( | |
687 | pim, ifindex); | |
688 | /* Pass Current selected NH vif index to mroute | |
689 | * download */ | |
690 | if (vif_index) | |
691 | pim_scan_individual_oil(c_oil, | |
692 | vif_index); | |
693 | } else | |
694 | pim_scan_individual_oil(c_oil, 0); | |
695 | } | |
d62a17ae | 696 | } |
12e41d03 DL |
697 | } |
698 | ||
699 | static int on_rpf_cache_refresh(struct thread *t) | |
700 | { | |
d62a17ae | 701 | /* update PIM protocol state */ |
702 | scan_upstream_rpf_cache(); | |
12e41d03 | 703 | |
d62a17ae | 704 | /* update kernel multicast forwarding cache (MFC) */ |
c68ba0d7 | 705 | pim_scan_oil(NULL); |
12e41d03 | 706 | |
d62a17ae | 707 | qpim_rpf_cache_refresh_last = pim_time_monotonic_sec(); |
708 | ++qpim_rpf_cache_refresh_events; | |
12e41d03 | 709 | |
d62a17ae | 710 | // It is called as part of pim_neighbor_add |
711 | // pim_rp_setup (); | |
712 | return 0; | |
12e41d03 DL |
713 | } |
714 | ||
da72c9fd | 715 | void sched_rpf_cache_refresh(void) |
12e41d03 | 716 | { |
d62a17ae | 717 | ++qpim_rpf_cache_refresh_requests; |
12e41d03 | 718 | |
d62a17ae | 719 | pim_rpf_set_refresh_time(); |
e71bf8f7 | 720 | |
d62a17ae | 721 | if (qpim_rpf_cache_refresher) { |
722 | /* Refresh timer is already running */ | |
723 | return; | |
724 | } | |
12e41d03 | 725 | |
d62a17ae | 726 | /* Start refresh timer */ |
12e41d03 | 727 | |
d62a17ae | 728 | if (PIM_DEBUG_ZEBRA) { |
729 | zlog_debug("%s: triggering %ld msec timer", __PRETTY_FUNCTION__, | |
730 | qpim_rpf_cache_refresh_delay_msec); | |
731 | } | |
12e41d03 | 732 | |
d62a17ae | 733 | thread_add_timer_msec(master, on_rpf_cache_refresh, 0, |
734 | qpim_rpf_cache_refresh_delay_msec, | |
735 | &qpim_rpf_cache_refresher); | |
12e41d03 DL |
736 | } |
737 | ||
d62a17ae | 738 | static void pim_zebra_connected(struct zclient *zclient) |
48e8451b | 739 | { |
d62a17ae | 740 | /* Send the client registration */ |
741 | bfd_client_sendmsg(zclient, ZEBRA_BFD_CLIENT_REGISTER); | |
ba4eb1bc | 742 | |
0708beb1 | 743 | zclient_send_reg_requests(zclient, pimg->vrf_id); |
48e8451b | 744 | } |
8711a53d | 745 | |
eb05883f | 746 | void pim_zebra_init(void) |
12e41d03 | 747 | { |
d62a17ae | 748 | int i; |
12e41d03 | 749 | |
d62a17ae | 750 | /* Socket for receiving updates from Zebra daemon */ |
e1a1880d | 751 | zclient = zclient_new_notify(master, &zclient_options_default); |
d62a17ae | 752 | |
753 | zclient->zebra_connected = pim_zebra_connected; | |
754 | zclient->router_id_update = pim_router_id_update_zebra; | |
755 | zclient->interface_add = pim_zebra_if_add; | |
756 | zclient->interface_delete = pim_zebra_if_del; | |
757 | zclient->interface_up = pim_zebra_if_state_up; | |
758 | zclient->interface_down = pim_zebra_if_state_down; | |
759 | zclient->interface_address_add = pim_zebra_if_address_add; | |
760 | zclient->interface_address_delete = pim_zebra_if_address_del; | |
761 | zclient->nexthop_update = pim_parse_nexthop_update; | |
762 | ||
342213ea | 763 | zclient_init(zclient, ZEBRA_ROUTE_PIM, 0, &pimd_privs); |
d62a17ae | 764 | if (PIM_DEBUG_PIM_TRACE) { |
765 | zlog_info("zclient_init cleared redistribution request"); | |
766 | } | |
767 | ||
768 | zassert(zclient->redist_default == ZEBRA_ROUTE_PIM); | |
769 | ||
770 | /* Request all redistribution */ | |
771 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) { | |
772 | if (i == zclient->redist_default) | |
773 | continue; | |
0708beb1 | 774 | vrf_bitmap_set(zclient->redist[AFI_IP][i], pimg->vrf_id); |
d62a17ae | 775 | ; |
776 | if (PIM_DEBUG_PIM_TRACE) { | |
777 | zlog_debug("%s: requesting redistribution for %s (%i)", | |
778 | __PRETTY_FUNCTION__, zebra_route_string(i), | |
779 | i); | |
780 | } | |
781 | } | |
782 | ||
783 | /* Request default information */ | |
784 | zclient_redistribute_default(ZEBRA_REDISTRIBUTE_DEFAULT_ADD, zclient, | |
0708beb1 | 785 | pimg->vrf_id); |
d62a17ae | 786 | |
787 | if (PIM_DEBUG_PIM_TRACE) { | |
788 | zlog_info("%s: requesting default information redistribution", | |
789 | __PRETTY_FUNCTION__); | |
790 | ||
791 | zlog_notice("%s: zclient update socket initialized", | |
792 | __PRETTY_FUNCTION__); | |
793 | } | |
794 | ||
795 | zclient_lookup_new(); | |
12e41d03 DL |
796 | } |
797 | ||
6f932b0c DS |
798 | void igmp_anysource_forward_start(struct pim_instance *pim, |
799 | struct igmp_group *group) | |
12e41d03 | 800 | { |
d62a17ae | 801 | struct igmp_source *source; |
802 | struct in_addr src_addr = {.s_addr = 0}; | |
803 | /* Any source (*,G) is forwarded only if mode is EXCLUDE {empty} */ | |
804 | zassert(group->group_filtermode_isexcl); | |
805 | zassert(listcount(group->group_source_list) < 1); | |
806 | ||
807 | source = source_new(group, src_addr); | |
808 | if (!source) { | |
809 | zlog_warn("%s: Failure to create * source", | |
810 | __PRETTY_FUNCTION__); | |
811 | return; | |
812 | } | |
813 | ||
6f932b0c | 814 | igmp_source_forward_start(pim, source); |
12e41d03 DL |
815 | } |
816 | ||
817 | void igmp_anysource_forward_stop(struct igmp_group *group) | |
818 | { | |
d62a17ae | 819 | struct igmp_source *source; |
820 | struct in_addr star = {.s_addr = 0}; | |
12e41d03 | 821 | |
d62a17ae | 822 | source = igmp_find_source_by_addr(group, star); |
823 | if (source) | |
824 | igmp_source_forward_stop(source); | |
12e41d03 DL |
825 | } |
826 | ||
6f439a70 DS |
827 | static void igmp_source_forward_reevaluate_one(struct pim_instance *pim, |
828 | struct igmp_source *source) | |
15a5dafe | 829 | { |
d62a17ae | 830 | struct prefix_sg sg; |
831 | struct igmp_group *group = source->source_group; | |
832 | struct pim_ifchannel *ch; | |
833 | ||
834 | if ((source->source_addr.s_addr != INADDR_ANY) | |
835 | || !IGMP_SOURCE_TEST_FORWARDING(source->source_flags)) | |
836 | return; | |
837 | ||
838 | memset(&sg, 0, sizeof(struct prefix_sg)); | |
839 | sg.src = source->source_addr; | |
840 | sg.grp = group->group_addr; | |
841 | ||
842 | ch = pim_ifchannel_find(group->group_igmp_sock->interface, &sg); | |
6f439a70 | 843 | if (pim_is_grp_ssm(pim, group->group_addr)) { |
d62a17ae | 844 | /* If SSM group withdraw local membership */ |
845 | if (ch | |
846 | && (ch->local_ifmembership == PIM_IFMEMBERSHIP_INCLUDE)) { | |
847 | if (PIM_DEBUG_PIM_EVENTS) | |
848 | zlog_debug( | |
849 | "local membership del for %s as G is now SSM", | |
850 | pim_str_sg_dump(&sg)); | |
851 | pim_ifchannel_local_membership_del( | |
852 | group->group_igmp_sock->interface, &sg); | |
853 | } | |
854 | } else { | |
855 | /* If ASM group add local membership */ | |
856 | if (!ch | |
857 | || (ch->local_ifmembership == PIM_IFMEMBERSHIP_NOINFO)) { | |
858 | if (PIM_DEBUG_PIM_EVENTS) | |
859 | zlog_debug( | |
860 | "local membership add for %s as G is now ASM", | |
861 | pim_str_sg_dump(&sg)); | |
862 | pim_ifchannel_local_membership_add( | |
863 | group->group_igmp_sock->interface, &sg); | |
864 | } | |
865 | } | |
15a5dafe | 866 | } |
867 | ||
d62a17ae | 868 | void igmp_source_forward_reevaluate_all(void) |
15a5dafe | 869 | { |
d62a17ae | 870 | struct interface *ifp; |
6f932b0c DS |
871 | struct vrf *vrf; |
872 | struct pim_instance *pim; | |
d62a17ae | 873 | |
a2addae8 | 874 | RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) { |
6f932b0c DS |
875 | pim = vrf->info; |
876 | if (!pim) | |
d62a17ae | 877 | continue; |
878 | ||
451fda4f | 879 | FOR_ALL_INTERFACES (pim->vrf, ifp) { |
6f932b0c DS |
880 | struct pim_interface *pim_ifp = ifp->info; |
881 | struct listnode *sock_node; | |
882 | struct igmp_sock *igmp; | |
d62a17ae | 883 | |
6f932b0c DS |
884 | if (!pim_ifp) |
885 | continue; | |
d62a17ae | 886 | |
6f932b0c DS |
887 | /* scan igmp sockets */ |
888 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->igmp_socket_list, | |
889 | sock_node, igmp)) { | |
890 | struct listnode *grpnode; | |
891 | struct igmp_group *grp; | |
892 | ||
893 | /* scan igmp groups */ | |
894 | for (ALL_LIST_ELEMENTS_RO(igmp->igmp_group_list, | |
895 | grpnode, grp)) { | |
896 | struct listnode *srcnode; | |
897 | struct igmp_source *src; | |
898 | ||
899 | /* scan group sources */ | |
900 | for (ALL_LIST_ELEMENTS_RO( | |
901 | grp->group_source_list, | |
902 | srcnode, src)) { | |
903 | igmp_source_forward_reevaluate_one( | |
6f439a70 | 904 | pim, src); |
6f932b0c DS |
905 | } /* scan group sources */ |
906 | } /* scan igmp groups */ | |
907 | } /* scan igmp sockets */ | |
908 | } /* scan interfaces */ | |
909 | } | |
15a5dafe | 910 | } |
911 | ||
6f932b0c DS |
912 | void igmp_source_forward_start(struct pim_instance *pim, |
913 | struct igmp_source *source) | |
12e41d03 | 914 | { |
d62a17ae | 915 | struct igmp_group *group; |
916 | struct prefix_sg sg; | |
917 | int result; | |
918 | int input_iface_vif_index = 0; | |
919 | ||
920 | memset(&sg, 0, sizeof(struct prefix_sg)); | |
921 | sg.src = source->source_addr; | |
922 | sg.grp = source->source_group->group_addr; | |
923 | ||
924 | if (PIM_DEBUG_IGMP_TRACE) { | |
925 | zlog_debug( | |
926 | "%s: (S,G)=%s igmp_sock=%d oif=%s fwd=%d", | |
927 | __PRETTY_FUNCTION__, pim_str_sg_dump(&sg), | |
928 | source->source_group->group_igmp_sock->fd, | |
929 | source->source_group->group_igmp_sock->interface->name, | |
930 | IGMP_SOURCE_TEST_FORWARDING(source->source_flags)); | |
931 | } | |
932 | ||
933 | /* Prevent IGMP interface from installing multicast route multiple | |
934 | times */ | |
935 | if (IGMP_SOURCE_TEST_FORWARDING(source->source_flags)) { | |
936 | return; | |
8711a53d | 937 | } |
d62a17ae | 938 | |
939 | group = source->source_group; | |
940 | ||
941 | if (!source->source_channel_oil) { | |
942 | struct in_addr vif_source; | |
943 | struct pim_interface *pim_oif; | |
944 | struct prefix nht_p, src, grp; | |
d62a17ae | 945 | struct pim_nexthop_cache out_pnc; |
946 | struct pim_nexthop nexthop; | |
947 | struct pim_upstream *up = NULL; | |
948 | ||
6f932b0c | 949 | if (!pim_rp_set_upstream_addr(pim, &vif_source, |
d9c9a9ee | 950 | source->source_addr, sg.grp)) |
d62a17ae | 951 | return; |
952 | ||
953 | /* Register addr with Zebra NHT */ | |
954 | nht_p.family = AF_INET; | |
955 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
956 | nht_p.u.prefix4 = vif_source; | |
957 | memset(&out_pnc, 0, sizeof(struct pim_nexthop_cache)); | |
958 | ||
959 | src.family = AF_INET; | |
960 | src.prefixlen = IPV4_MAX_BITLEN; | |
961 | src.u.prefix4 = vif_source; // RP or Src address | |
962 | grp.family = AF_INET; | |
963 | grp.prefixlen = IPV4_MAX_BITLEN; | |
964 | grp.u.prefix4 = sg.grp; | |
965 | ||
6f932b0c | 966 | if (pim_find_or_track_nexthop(pim, &nht_p, NULL, NULL, |
25bdac42 | 967 | &out_pnc)) { |
d62a17ae | 968 | if (out_pnc.nexthop_num) { |
6f932b0c | 969 | up = pim_upstream_find(pim, &sg); |
cb9c7c50 | 970 | memset(&nexthop, 0, sizeof(nexthop)); |
d62a17ae | 971 | if (up) |
972 | memcpy(&nexthop, | |
973 | &up->rpf.source_nexthop, | |
974 | sizeof(struct pim_nexthop)); | |
6f932b0c DS |
975 | pim_ecmp_nexthop_search(pim, &out_pnc, &nexthop, |
976 | &src, &grp, 0); | |
d62a17ae | 977 | if (nexthop.interface) |
978 | input_iface_vif_index = | |
979 | pim_if_find_vifindex_by_ifindex( | |
6f932b0c | 980 | pim, |
d62a17ae | 981 | nexthop.interface->ifindex); |
982 | } else { | |
983 | if (PIM_DEBUG_ZEBRA) { | |
984 | char buf1[INET_ADDRSTRLEN]; | |
985 | char buf2[INET_ADDRSTRLEN]; | |
986 | pim_inet4_dump("<source?>", | |
987 | nht_p.u.prefix4, buf1, | |
988 | sizeof(buf1)); | |
989 | pim_inet4_dump("<source?>", | |
990 | grp.u.prefix4, buf2, | |
991 | sizeof(buf2)); | |
992 | zlog_debug( | |
993 | "%s: NHT Nexthop not found for addr %s grp %s", | |
994 | __PRETTY_FUNCTION__, buf1, | |
995 | buf2); | |
996 | } | |
997 | } | |
998 | } else | |
999 | input_iface_vif_index = | |
25b787a2 | 1000 | pim_ecmp_fib_lookup_if_vif_index( |
6f932b0c | 1001 | pim, vif_source, &src, &grp); |
d62a17ae | 1002 | |
1003 | if (PIM_DEBUG_ZEBRA) { | |
1004 | char buf2[INET_ADDRSTRLEN]; | |
1005 | pim_inet4_dump("<source?>", vif_source, buf2, | |
1006 | sizeof(buf2)); | |
1007 | zlog_debug("%s: NHT %s vif_source %s vif_index:%d ", | |
1008 | __PRETTY_FUNCTION__, pim_str_sg_dump(&sg), | |
1009 | buf2, input_iface_vif_index); | |
1010 | } | |
1011 | ||
1012 | if (input_iface_vif_index < 1) { | |
1013 | if (PIM_DEBUG_IGMP_TRACE) { | |
1014 | char source_str[INET_ADDRSTRLEN]; | |
1015 | pim_inet4_dump("<source?>", source->source_addr, | |
1016 | source_str, sizeof(source_str)); | |
1017 | zlog_debug( | |
1018 | "%s %s: could not find input interface for source %s", | |
1019 | __FILE__, __PRETTY_FUNCTION__, | |
1020 | source_str); | |
1021 | } | |
1022 | return; | |
1023 | } | |
1024 | ||
1025 | /* | |
1026 | Protect IGMP against adding looped MFC entries created by both | |
1027 | source and receiver attached to the same interface. See TODO | |
1028 | T22. | |
1029 | */ | |
1030 | pim_oif = | |
1031 | source->source_group->group_igmp_sock->interface->info; | |
1032 | if (!pim_oif) { | |
1033 | if (PIM_DEBUG_IGMP_TRACE) { | |
1034 | zlog_debug( | |
1035 | "%s: multicast not enabled on oif=%s ?", | |
1036 | __PRETTY_FUNCTION__, | |
1037 | source->source_group->group_igmp_sock | |
1038 | ->interface->name); | |
1039 | } | |
1040 | return; | |
1041 | } | |
1042 | ||
1043 | if (input_iface_vif_index == pim_oif->mroute_vif_index) { | |
1044 | /* ignore request for looped MFC entry */ | |
1045 | if (PIM_DEBUG_IGMP_TRACE) { | |
1046 | zlog_debug( | |
1047 | "%s: ignoring request for looped MFC entry (S,G)=%s: igmp_sock=%d oif=%s vif_index=%d", | |
1048 | __PRETTY_FUNCTION__, | |
1049 | pim_str_sg_dump(&sg), | |
1050 | source->source_group->group_igmp_sock | |
1051 | ->fd, | |
1052 | source->source_group->group_igmp_sock | |
1053 | ->interface->name, | |
1054 | input_iface_vif_index); | |
1055 | } | |
1056 | return; | |
1057 | } | |
1058 | ||
1059 | source->source_channel_oil = | |
6f932b0c | 1060 | pim_channel_oil_add(pim, &sg, input_iface_vif_index); |
d62a17ae | 1061 | if (!source->source_channel_oil) { |
1062 | if (PIM_DEBUG_IGMP_TRACE) { | |
1063 | zlog_debug( | |
1064 | "%s %s: could not create OIL for channel (S,G)=%s", | |
1065 | __FILE__, __PRETTY_FUNCTION__, | |
1066 | pim_str_sg_dump(&sg)); | |
1067 | } | |
1068 | return; | |
1069 | } | |
8711a53d | 1070 | } |
d62a17ae | 1071 | |
1072 | result = pim_channel_add_oif(source->source_channel_oil, | |
1073 | group->group_igmp_sock->interface, | |
1074 | PIM_OIF_FLAG_PROTO_IGMP); | |
1075 | if (result) { | |
1076 | if (PIM_DEBUG_MROUTE) { | |
1077 | zlog_warn("%s: add_oif() failed with return=%d", | |
1078 | __func__, result); | |
1079 | } | |
1080 | return; | |
8711a53d | 1081 | } |
d62a17ae | 1082 | |
1083 | /* | |
1084 | Feed IGMPv3-gathered local membership information into PIM | |
1085 | per-interface (S,G) state. | |
1086 | */ | |
1087 | if (!pim_ifchannel_local_membership_add( | |
1088 | group->group_igmp_sock->interface, &sg)) { | |
1089 | if (PIM_DEBUG_MROUTE) | |
1090 | zlog_warn("%s: Failure to add local membership for %s", | |
1091 | __PRETTY_FUNCTION__, pim_str_sg_dump(&sg)); | |
1092 | return; | |
1093 | } | |
1094 | ||
1095 | IGMP_SOURCE_DO_FORWARDING(source->source_flags); | |
12e41d03 DL |
1096 | } |
1097 | ||
1098 | /* | |
1099 | igmp_source_forward_stop: stop fowarding, but keep the source | |
1100 | igmp_source_delete: stop fowarding, and delete the source | |
1101 | */ | |
1102 | void igmp_source_forward_stop(struct igmp_source *source) | |
1103 | { | |
d62a17ae | 1104 | struct igmp_group *group; |
1105 | struct prefix_sg sg; | |
1106 | int result; | |
1107 | ||
1108 | memset(&sg, 0, sizeof(struct prefix_sg)); | |
1109 | sg.src = source->source_addr; | |
1110 | sg.grp = source->source_group->group_addr; | |
1111 | ||
1112 | if (PIM_DEBUG_IGMP_TRACE) { | |
1113 | zlog_debug( | |
1114 | "%s: (S,G)=%s igmp_sock=%d oif=%s fwd=%d", | |
1115 | __PRETTY_FUNCTION__, pim_str_sg_dump(&sg), | |
1116 | source->source_group->group_igmp_sock->fd, | |
1117 | source->source_group->group_igmp_sock->interface->name, | |
1118 | IGMP_SOURCE_TEST_FORWARDING(source->source_flags)); | |
1119 | } | |
1120 | ||
1121 | /* Prevent IGMP interface from removing multicast route multiple | |
1122 | times */ | |
1123 | if (!IGMP_SOURCE_TEST_FORWARDING(source->source_flags)) { | |
1124 | return; | |
1125 | } | |
1126 | ||
1127 | group = source->source_group; | |
1128 | ||
1129 | /* | |
1130 | It appears that in certain circumstances that | |
1131 | igmp_source_forward_stop is called when IGMP forwarding | |
1132 | was not enabled in oif_flags for this outgoing interface. | |
1133 | Possibly because of multiple calls. When that happens, we | |
1134 | enter the below if statement and this function returns early | |
1135 | which in turn triggers the calling function to assert. | |
1136 | Making the call to pim_channel_del_oif and ignoring the return code | |
1137 | fixes the issue without ill effect, similar to | |
1138 | pim_forward_stop below. | |
1139 | */ | |
1140 | result = pim_channel_del_oif(source->source_channel_oil, | |
1141 | group->group_igmp_sock->interface, | |
1142 | PIM_OIF_FLAG_PROTO_IGMP); | |
1143 | if (result) { | |
1144 | if (PIM_DEBUG_IGMP_TRACE) | |
1145 | zlog_debug( | |
1146 | "%s: pim_channel_del_oif() failed with return=%d", | |
1147 | __func__, result); | |
1148 | return; | |
1149 | } | |
1150 | ||
1151 | /* | |
1152 | Feed IGMPv3-gathered local membership information into PIM | |
1153 | per-interface (S,G) state. | |
1154 | */ | |
1155 | pim_ifchannel_local_membership_del(group->group_igmp_sock->interface, | |
1156 | &sg); | |
1157 | ||
1158 | IGMP_SOURCE_DONT_FORWARDING(source->source_flags); | |
12e41d03 DL |
1159 | } |
1160 | ||
1161 | void pim_forward_start(struct pim_ifchannel *ch) | |
1162 | { | |
d62a17ae | 1163 | struct pim_upstream *up = ch->upstream; |
1164 | uint32_t mask = PIM_OIF_FLAG_PROTO_PIM; | |
1165 | int input_iface_vif_index = 0; | |
6f932b0c DS |
1166 | struct pim_instance *pim; |
1167 | struct pim_interface *pim_ifp; | |
1168 | ||
1169 | pim_ifp = ch->interface->info; | |
1170 | pim = pim_ifp->pim; | |
d62a17ae | 1171 | |
1172 | if (PIM_DEBUG_PIM_TRACE) { | |
1173 | char source_str[INET_ADDRSTRLEN]; | |
1174 | char group_str[INET_ADDRSTRLEN]; | |
1175 | char upstream_str[INET_ADDRSTRLEN]; | |
1176 | ||
1177 | pim_inet4_dump("<source?>", ch->sg.src, source_str, | |
1178 | sizeof(source_str)); | |
1179 | pim_inet4_dump("<group?>", ch->sg.grp, group_str, | |
1180 | sizeof(group_str)); | |
1181 | pim_inet4_dump("<upstream?>", up->upstream_addr, upstream_str, | |
1182 | sizeof(upstream_str)); | |
1183 | zlog_debug("%s: (S,G)=(%s,%s) oif=%s (%s)", __PRETTY_FUNCTION__, | |
1184 | source_str, group_str, ch->interface->name, | |
1185 | upstream_str); | |
1186 | } | |
1187 | ||
1188 | /* Resolve IIF for upstream as mroute_del sets mfcc_parent to MAXVIFS, | |
1189 | as part of mroute_del called by pim_forward_stop. | |
1190 | */ | |
1191 | if (!up->channel_oil | |
1192 | || (up->channel_oil | |
1193 | && up->channel_oil->oil.mfcc_parent >= MAXVIFS)) { | |
1194 | struct prefix nht_p, src, grp; | |
d62a17ae | 1195 | struct pim_nexthop_cache out_pnc; |
1196 | ||
1197 | /* Register addr with Zebra NHT */ | |
1198 | nht_p.family = AF_INET; | |
1199 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
1200 | nht_p.u.prefix4.s_addr = up->upstream_addr.s_addr; | |
1201 | grp.family = AF_INET; | |
1202 | grp.prefixlen = IPV4_MAX_BITLEN; | |
1203 | grp.u.prefix4 = up->sg.grp; | |
1204 | memset(&out_pnc, 0, sizeof(struct pim_nexthop_cache)); | |
1205 | ||
6f932b0c | 1206 | if (pim_find_or_track_nexthop(pim, &nht_p, NULL, NULL, |
25bdac42 | 1207 | &out_pnc)) { |
d62a17ae | 1208 | if (out_pnc.nexthop_num) { |
1209 | src.family = AF_INET; | |
1210 | src.prefixlen = IPV4_MAX_BITLEN; | |
1211 | src.u.prefix4 = | |
1212 | up->upstream_addr; // RP or Src address | |
1213 | grp.family = AF_INET; | |
1214 | grp.prefixlen = IPV4_MAX_BITLEN; | |
1215 | grp.u.prefix4 = up->sg.grp; | |
1216 | // Compute PIM RPF using Cached nexthop | |
1217 | if (pim_ecmp_nexthop_search( | |
6f932b0c | 1218 | pim, &out_pnc, |
25b787a2 DS |
1219 | &up->rpf.source_nexthop, &src, &grp, |
1220 | 0)) | |
d62a17ae | 1221 | input_iface_vif_index = |
1222 | pim_if_find_vifindex_by_ifindex( | |
6f932b0c | 1223 | pim, |
d62a17ae | 1224 | up->rpf.source_nexthop |
1225 | .interface->ifindex); | |
1226 | else { | |
1227 | if (PIM_DEBUG_TRACE) | |
1228 | zlog_debug( | |
1229 | "%s: Nexthop selection failed for %s ", | |
1230 | __PRETTY_FUNCTION__, | |
1231 | up->sg_str); | |
1232 | } | |
1233 | } else { | |
1234 | if (PIM_DEBUG_ZEBRA) { | |
1235 | char buf1[INET_ADDRSTRLEN]; | |
1236 | char buf2[INET_ADDRSTRLEN]; | |
1237 | pim_inet4_dump("<source?>", | |
1238 | nht_p.u.prefix4, buf1, | |
1239 | sizeof(buf1)); | |
1240 | pim_inet4_dump("<source?>", | |
1241 | grp.u.prefix4, buf2, | |
1242 | sizeof(buf2)); | |
1243 | zlog_debug( | |
1244 | "%s: NHT pnc is NULL for addr %s grp %s", | |
1245 | __PRETTY_FUNCTION__, buf1, | |
1246 | buf2); | |
1247 | } | |
1248 | } | |
1249 | } else | |
1250 | input_iface_vif_index = | |
1251 | pim_ecmp_fib_lookup_if_vif_index( | |
6f932b0c | 1252 | pim, up->upstream_addr, &src, &grp); |
d62a17ae | 1253 | |
1254 | if (input_iface_vif_index < 1) { | |
1255 | if (PIM_DEBUG_PIM_TRACE) { | |
1256 | char source_str[INET_ADDRSTRLEN]; | |
1257 | pim_inet4_dump("<source?>", up->sg.src, | |
1258 | source_str, sizeof(source_str)); | |
1259 | zlog_debug( | |
1260 | "%s %s: could not find input interface for source %s", | |
1261 | __FILE__, __PRETTY_FUNCTION__, | |
1262 | source_str); | |
1263 | } | |
1264 | return; | |
1265 | } | |
1266 | if (PIM_DEBUG_TRACE) { | |
7cfc7bcf | 1267 | struct interface *in_intf = pim_if_find_by_vif_index( |
6f932b0c | 1268 | pim, input_iface_vif_index); |
d62a17ae | 1269 | zlog_debug( |
1270 | "%s: Update channel_oil IIF %s VIFI %d entry %s ", | |
1271 | __PRETTY_FUNCTION__, | |
1272 | in_intf ? in_intf->name : "NIL", | |
1273 | input_iface_vif_index, up->sg_str); | |
1274 | } | |
6f932b0c | 1275 | up->channel_oil = pim_channel_oil_add(pim, &up->sg, |
611925dc | 1276 | input_iface_vif_index); |
d62a17ae | 1277 | if (!up->channel_oil) { |
1278 | if (PIM_DEBUG_PIM_TRACE) | |
1279 | zlog_debug( | |
1280 | "%s %s: could not create OIL for channel (S,G)=%s", | |
1281 | __FILE__, __PRETTY_FUNCTION__, | |
1282 | up->sg_str); | |
1283 | return; | |
1284 | } | |
1285 | } | |
1286 | ||
1287 | if (up->flags & PIM_UPSTREAM_FLAG_MASK_SRC_IGMP) | |
1288 | mask = PIM_OIF_FLAG_PROTO_IGMP; | |
1289 | ||
1290 | pim_channel_add_oif(up->channel_oil, ch->interface, mask); | |
12e41d03 DL |
1291 | } |
1292 | ||
aabb9a2f | 1293 | void pim_forward_stop(struct pim_ifchannel *ch, bool install_it) |
12e41d03 | 1294 | { |
d62a17ae | 1295 | struct pim_upstream *up = ch->upstream; |
12e41d03 | 1296 | |
d62a17ae | 1297 | if (PIM_DEBUG_PIM_TRACE) { |
aabb9a2f DS |
1298 | zlog_debug("%s: (S,G)=%s oif=%s install_it: %d installed: %d", |
1299 | __PRETTY_FUNCTION__, ch->sg_str, ch->interface->name, | |
1300 | install_it, up->channel_oil->installed); | |
d62a17ae | 1301 | } |
12e41d03 | 1302 | |
d62a17ae | 1303 | pim_channel_del_oif(up->channel_oil, ch->interface, |
1304 | PIM_OIF_FLAG_PROTO_PIM); | |
aabb9a2f DS |
1305 | |
1306 | if (install_it && !up->channel_oil->installed) | |
1307 | pim_mroute_add(up->channel_oil, __PRETTY_FUNCTION__); | |
12e41d03 | 1308 | } |
8799b66b | 1309 | |
d62a17ae | 1310 | void pim_zebra_zclient_update(struct vty *vty) |
8799b66b | 1311 | { |
d62a17ae | 1312 | vty_out(vty, "Zclient update socket: "); |
1313 | ||
1314 | if (zclient) { | |
1315 | vty_out(vty, "%d failures=%d\n", zclient->sock, zclient->fail); | |
1316 | } else { | |
1317 | vty_out(vty, "<null zclient>\n"); | |
1318 | } | |
8799b66b | 1319 | } |
1bc98276 | 1320 | |
d62a17ae | 1321 | struct zclient *pim_zebra_zclient_get(void) |
1bc98276 | 1322 | { |
d62a17ae | 1323 | if (zclient) |
1324 | return zclient; | |
1325 | else | |
1326 | return NULL; | |
1bc98276 | 1327 | } |