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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; |
26bb1fd5 | 72 | struct pim_instance *pim; |
d62a17ae | 73 | |
74 | /* | |
75 | zebra api adds/dels interfaces using the same call | |
76 | interface_add_read below, see comments in lib/zclient.c | |
77 | */ | |
78 | ifp = zebra_interface_add_read(zclient->ibuf, vrf_id); | |
79 | if (!ifp) | |
80 | return 0; | |
81 | ||
26bb1fd5 | 82 | pim = pim_get_pim_instance(vrf_id); |
d62a17ae | 83 | if (PIM_DEBUG_ZEBRA) { |
84 | zlog_debug( | |
87ad28f4 | 85 | "%s: %s index %d(%u) flags %ld metric %d mtu %d operative %d", |
e0ae31b8 | 86 | __PRETTY_FUNCTION__, ifp->name, ifp->ifindex, vrf_id, |
d62a17ae | 87 | (long)ifp->flags, ifp->metric, ifp->mtu, |
88 | if_is_operative(ifp)); | |
89 | } | |
90 | ||
26bb1fd5 DS |
91 | if (if_is_operative(ifp)) { |
92 | struct pim_interface *pim_ifp; | |
93 | ||
94 | pim_ifp = ifp->info; | |
95 | /* | |
96 | * If we have a pim_ifp already and this is an if_add | |
97 | * that means that we probably have a vrf move event | |
98 | * If that is the case, set the proper vrfness. | |
99 | */ | |
100 | if (pim_ifp) | |
101 | pim_ifp->pim = pim; | |
d62a17ae | 102 | pim_if_addr_add_all(ifp); |
26bb1fd5 | 103 | } |
d62a17ae | 104 | |
90133de6 DS |
105 | /* |
106 | * If we are a vrf device that is up, open up the pim_socket for | |
107 | * listening | |
108 | * to incoming pim messages irrelevant if the user has configured us | |
109 | * for pim or not. | |
110 | */ | |
111 | if (pim_if_is_vrf_device(ifp)) { | |
112 | struct pim_interface *pim_ifp; | |
113 | ||
114 | if (!ifp->info) { | |
115 | pim_ifp = pim_if_new(ifp, 0, 0); | |
116 | ifp->info = pim_ifp; | |
117 | } | |
118 | ||
119 | pim_sock_add(ifp); | |
120 | } | |
121 | ||
d62a17ae | 122 | return 0; |
12e41d03 DL |
123 | } |
124 | ||
125 | static int pim_zebra_if_del(int command, struct zclient *zclient, | |
469351b3 | 126 | zebra_size_t length, vrf_id_t vrf_id) |
12e41d03 | 127 | { |
d62a17ae | 128 | struct interface *ifp; |
129 | ||
130 | /* | |
131 | zebra api adds/dels interfaces using the same call | |
132 | interface_add_read below, see comments in lib/zclient.c | |
133 | ||
134 | comments in lib/zclient.c seem to indicate that calling | |
135 | zebra_interface_add_read is the correct call, but that | |
136 | results in an attemted out of bounds read which causes | |
137 | pimd to assert. Other clients use zebra_interface_state_read | |
138 | and it appears to work just fine. | |
139 | */ | |
140 | ifp = zebra_interface_state_read(zclient->ibuf, vrf_id); | |
141 | if (!ifp) | |
142 | return 0; | |
143 | ||
144 | if (PIM_DEBUG_ZEBRA) { | |
145 | zlog_debug( | |
87ad28f4 | 146 | "%s: %s index %d(%u) flags %ld metric %d mtu %d operative %d", |
e0ae31b8 | 147 | __PRETTY_FUNCTION__, ifp->name, ifp->ifindex, vrf_id, |
d62a17ae | 148 | (long)ifp->flags, ifp->metric, ifp->mtu, |
149 | if_is_operative(ifp)); | |
150 | } | |
151 | ||
152 | if (!if_is_operative(ifp)) | |
153 | pim_if_addr_del_all(ifp); | |
154 | ||
155 | return 0; | |
12e41d03 DL |
156 | } |
157 | ||
158 | static int pim_zebra_if_state_up(int command, struct zclient *zclient, | |
469351b3 | 159 | zebra_size_t length, vrf_id_t vrf_id) |
12e41d03 | 160 | { |
26bb1fd5 | 161 | struct pim_instance *pim; |
d62a17ae | 162 | struct interface *ifp; |
e0ae31b8 | 163 | uint32_t table_id; |
d62a17ae | 164 | |
165 | /* | |
166 | zebra api notifies interface up/down events by using the same call | |
167 | zebra_interface_state_read below, see comments in lib/zclient.c | |
168 | */ | |
169 | ifp = zebra_interface_state_read(zclient->ibuf, vrf_id); | |
170 | if (!ifp) | |
171 | return 0; | |
172 | ||
173 | if (PIM_DEBUG_ZEBRA) { | |
174 | zlog_debug( | |
87ad28f4 | 175 | "%s: %s index %d(%u) flags %ld metric %d mtu %d operative %d", |
e0ae31b8 | 176 | __PRETTY_FUNCTION__, ifp->name, ifp->ifindex, vrf_id, |
d62a17ae | 177 | (long)ifp->flags, ifp->metric, ifp->mtu, |
178 | if_is_operative(ifp)); | |
179 | } | |
180 | ||
26bb1fd5 | 181 | pim = pim_get_pim_instance(vrf_id); |
d62a17ae | 182 | if (if_is_operative(ifp)) { |
26bb1fd5 DS |
183 | struct pim_interface *pim_ifp; |
184 | ||
185 | pim_ifp = ifp->info; | |
186 | /* | |
187 | * If we have a pim_ifp already and this is an if_add | |
188 | * that means that we probably have a vrf move event | |
189 | * If that is the case, set the proper vrfness. | |
190 | */ | |
191 | if (pim_ifp) | |
192 | pim_ifp->pim = pim; | |
193 | ||
d62a17ae | 194 | /* |
195 | pim_if_addr_add_all() suffices for bringing up both IGMP and | |
196 | PIM | |
197 | */ | |
198 | pim_if_addr_add_all(ifp); | |
199 | } | |
200 | ||
e0ae31b8 DS |
201 | /* |
202 | * If we have a pimreg device callback and it's for a specific | |
203 | * table set the master appropriately | |
204 | */ | |
0651460e | 205 | if (sscanf(ifp->name, "pimreg%" SCNu32, &table_id) == 1) { |
e0ae31b8 | 206 | struct vrf *vrf; |
a2addae8 | 207 | RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) { |
e0ae31b8 DS |
208 | if ((table_id == vrf->data.l.table_id) |
209 | && (ifp->vrf_id != vrf->vrf_id)) { | |
210 | struct interface *master = if_lookup_by_name( | |
211 | vrf->name, vrf->vrf_id); | |
e691f179 DS |
212 | |
213 | if (!master) { | |
996c9314 LB |
214 | zlog_debug( |
215 | "%s: Unable to find Master interface for %s", | |
216 | __PRETTY_FUNCTION__, vrf->name); | |
e691f179 DS |
217 | return 0; |
218 | } | |
e0ae31b8 DS |
219 | zclient_interface_set_master(zclient, master, |
220 | ifp); | |
221 | } | |
222 | } | |
223 | } | |
d62a17ae | 224 | return 0; |
12e41d03 DL |
225 | } |
226 | ||
227 | static int pim_zebra_if_state_down(int command, struct zclient *zclient, | |
469351b3 | 228 | zebra_size_t length, vrf_id_t vrf_id) |
12e41d03 | 229 | { |
d62a17ae | 230 | struct interface *ifp; |
231 | ||
232 | /* | |
233 | zebra api notifies interface up/down events by using the same call | |
234 | zebra_interface_state_read below, see comments in lib/zclient.c | |
235 | */ | |
236 | ifp = zebra_interface_state_read(zclient->ibuf, vrf_id); | |
237 | if (!ifp) | |
238 | return 0; | |
239 | ||
240 | if (PIM_DEBUG_ZEBRA) { | |
241 | zlog_debug( | |
87ad28f4 | 242 | "%s: %s index %d(%u) flags %ld metric %d mtu %d operative %d", |
e0ae31b8 | 243 | __PRETTY_FUNCTION__, ifp->name, ifp->ifindex, vrf_id, |
d62a17ae | 244 | (long)ifp->flags, ifp->metric, ifp->mtu, |
245 | if_is_operative(ifp)); | |
246 | } | |
247 | ||
248 | if (!if_is_operative(ifp)) { | |
249 | pim_ifchannel_delete_all(ifp); | |
250 | /* | |
251 | pim_if_addr_del_all() suffices for shutting down IGMP, | |
252 | but not for shutting down PIM | |
253 | */ | |
254 | pim_if_addr_del_all(ifp); | |
255 | ||
256 | /* | |
257 | pim_sock_delete() closes the socket, stops read and timer | |
258 | threads, | |
259 | and kills all neighbors. | |
260 | */ | |
261 | if (ifp->info) { | |
262 | pim_sock_delete(ifp, "link down"); | |
263 | } | |
264 | } | |
265 | ||
266 | if (ifp->info) | |
267 | pim_if_del_vif(ifp); | |
268 | ||
269 | return 0; | |
12e41d03 DL |
270 | } |
271 | ||
272 | #ifdef PIM_DEBUG_IFADDR_DUMP | |
273 | static void dump_if_address(struct interface *ifp) | |
274 | { | |
d62a17ae | 275 | struct connected *ifc; |
276 | struct listnode *node; | |
277 | ||
278 | zlog_debug("%s %s: interface %s addresses:", __FILE__, | |
279 | __PRETTY_FUNCTION__, ifp->name); | |
280 | ||
281 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc)) { | |
282 | struct prefix *p = ifc->address; | |
283 | ||
284 | if (p->family != AF_INET) | |
285 | continue; | |
286 | ||
287 | zlog_debug("%s %s: interface %s address %s %s", __FILE__, | |
288 | __PRETTY_FUNCTION__, ifp->name, | |
289 | inet_ntoa(p->u.prefix4), | |
290 | CHECK_FLAG(ifc->flags, ZEBRA_IFA_SECONDARY) | |
291 | ? "secondary" | |
292 | : "primary"); | |
293 | } | |
12e41d03 DL |
294 | } |
295 | #endif | |
296 | ||
297 | static int pim_zebra_if_address_add(int command, struct zclient *zclient, | |
469351b3 | 298 | zebra_size_t length, vrf_id_t vrf_id) |
12e41d03 | 299 | { |
d62a17ae | 300 | struct connected *c; |
301 | struct prefix *p; | |
302 | struct pim_interface *pim_ifp; | |
26bb1fd5 | 303 | struct pim_instance *pim; |
d62a17ae | 304 | |
305 | /* | |
306 | zebra api notifies address adds/dels events by using the same call | |
307 | interface_add_read below, see comments in lib/zclient.c | |
308 | ||
309 | zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_ADD, ...) | |
310 | will add address to interface list by calling | |
311 | connected_add_by_prefix() | |
312 | */ | |
313 | c = zebra_interface_address_read(command, zclient->ibuf, vrf_id); | |
314 | if (!c) | |
315 | return 0; | |
316 | ||
317 | pim_ifp = c->ifp->info; | |
318 | p = c->address; | |
319 | ||
320 | if (PIM_DEBUG_ZEBRA) { | |
321 | char buf[BUFSIZ]; | |
322 | prefix2str(p, buf, BUFSIZ); | |
87ad28f4 | 323 | zlog_debug("%s: %s(%u) connected IP address %s flags %u %s", |
e0ae31b8 | 324 | __PRETTY_FUNCTION__, c->ifp->name, vrf_id, buf, |
996c9314 LB |
325 | c->flags, |
326 | CHECK_FLAG(c->flags, ZEBRA_IFA_SECONDARY) | |
327 | ? "secondary" | |
328 | : "primary"); | |
d62a17ae | 329 | |
12e41d03 | 330 | #ifdef PIM_DEBUG_IFADDR_DUMP |
d62a17ae | 331 | dump_if_address(c->ifp); |
12e41d03 | 332 | #endif |
d62a17ae | 333 | } |
12e41d03 | 334 | |
d62a17ae | 335 | if (!CHECK_FLAG(c->flags, ZEBRA_IFA_SECONDARY)) { |
336 | /* trying to add primary address */ | |
12e41d03 | 337 | |
d62a17ae | 338 | struct in_addr primary_addr = pim_find_primary_addr(c->ifp); |
339 | if (p->family != AF_INET | |
340 | || primary_addr.s_addr != p->u.prefix4.s_addr) { | |
341 | if (PIM_DEBUG_ZEBRA) { | |
342 | /* but we had a primary address already */ | |
12e41d03 | 343 | |
d62a17ae | 344 | char buf[BUFSIZ]; |
12e41d03 | 345 | |
d62a17ae | 346 | prefix2str(p, buf, BUFSIZ); |
12e41d03 | 347 | |
d62a17ae | 348 | zlog_warn( |
349 | "%s: %s : forcing secondary flag on %s", | |
350 | __PRETTY_FUNCTION__, c->ifp->name, buf); | |
351 | } | |
352 | SET_FLAG(c->flags, ZEBRA_IFA_SECONDARY); | |
353 | } | |
354 | } | |
12e41d03 | 355 | |
d62a17ae | 356 | pim_if_addr_add(c); |
26bb1fd5 DS |
357 | if (pim_ifp) { |
358 | pim = pim_get_pim_instance(vrf_id); | |
359 | pim_ifp->pim = pim; | |
360 | ||
d62a17ae | 361 | pim_rp_check_on_if_add(pim_ifp); |
26bb1fd5 | 362 | } |
12e41d03 | 363 | |
d62a17ae | 364 | if (if_is_loopback(c->ifp)) { |
f4e14fdb | 365 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
d62a17ae | 366 | struct interface *ifp; |
d8424057 | 367 | |
451fda4f | 368 | FOR_ALL_INTERFACES (vrf, ifp) { |
d62a17ae | 369 | if (!if_is_loopback(ifp) && if_is_operative(ifp)) |
370 | pim_if_addr_add_all(ifp); | |
371 | } | |
372 | } | |
d8424057 | 373 | |
d62a17ae | 374 | return 0; |
12e41d03 DL |
375 | } |
376 | ||
377 | static int pim_zebra_if_address_del(int command, struct zclient *client, | |
469351b3 | 378 | zebra_size_t length, vrf_id_t vrf_id) |
12e41d03 | 379 | { |
d62a17ae | 380 | struct connected *c; |
381 | struct prefix *p; | |
fec883d9 | 382 | struct vrf *vrf = vrf_lookup_by_id(vrf_id); |
819f099b DS |
383 | struct pim_instance *pim; |
384 | ||
385 | if (!vrf) | |
386 | return 0; | |
387 | pim = vrf->info; | |
d62a17ae | 388 | |
389 | /* | |
390 | zebra api notifies address adds/dels events by using the same call | |
391 | interface_add_read below, see comments in lib/zclient.c | |
392 | ||
393 | zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_DELETE, ...) | |
394 | will remove address from interface list by calling | |
395 | connected_delete_by_prefix() | |
396 | */ | |
397 | c = zebra_interface_address_read(command, client->ibuf, vrf_id); | |
398 | if (!c) | |
399 | return 0; | |
400 | ||
401 | p = c->address; | |
402 | if (p->family == AF_INET) { | |
403 | if (PIM_DEBUG_ZEBRA) { | |
404 | char buf[BUFSIZ]; | |
405 | prefix2str(p, buf, BUFSIZ); | |
406 | zlog_debug( | |
87ad28f4 | 407 | "%s: %s(%u) disconnected IP address %s flags %u %s", |
e0ae31b8 | 408 | __PRETTY_FUNCTION__, c->ifp->name, vrf_id, buf, |
d62a17ae | 409 | c->flags, |
410 | CHECK_FLAG(c->flags, ZEBRA_IFA_SECONDARY) | |
411 | ? "secondary" | |
412 | : "primary"); | |
6233f087 | 413 | |
12e41d03 | 414 | #ifdef PIM_DEBUG_IFADDR_DUMP |
d62a17ae | 415 | dump_if_address(c->ifp); |
12e41d03 | 416 | #endif |
d62a17ae | 417 | } |
12e41d03 | 418 | |
d62a17ae | 419 | pim_if_addr_del(c, 0); |
fec883d9 DS |
420 | pim_rp_setup(pim); |
421 | pim_i_am_rp_re_evaluate(pim); | |
d62a17ae | 422 | } |
6233f087 | 423 | |
d62a17ae | 424 | connected_free(c); |
425 | return 0; | |
12e41d03 DL |
426 | } |
427 | ||
74389231 DS |
428 | void pim_zebra_update_all_interfaces(struct pim_instance *pim) |
429 | { | |
430 | struct interface *ifp; | |
431 | ||
432 | FOR_ALL_INTERFACES (pim->vrf, ifp) { | |
433 | struct pim_interface *pim_ifp = ifp->info; | |
434 | struct pim_iface_upstream_switch *us; | |
435 | struct listnode *node; | |
436 | ||
437 | if (!pim_ifp) | |
438 | continue; | |
439 | ||
440 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->upstream_switch_list, node, | |
441 | us)) { | |
442 | struct pim_rpf rpf; | |
443 | ||
444 | rpf.source_nexthop.interface = ifp; | |
445 | rpf.rpf_addr.u.prefix4 = us->address; | |
446 | pim_joinprune_send(&rpf, us->us); | |
447 | pim_jp_agg_clear_group(us->us); | |
448 | } | |
449 | } | |
450 | } | |
451 | ||
cc67ccf9 DS |
452 | void pim_zebra_upstream_rpf_changed(struct pim_instance *pim, |
453 | struct pim_upstream *up, | |
454 | struct pim_rpf *old) | |
455 | { | |
456 | struct pim_neighbor *nbr; | |
457 | ||
458 | nbr = pim_neighbor_find(old->source_nexthop.interface, | |
459 | old->rpf_addr.u.prefix4); | |
460 | if (nbr) | |
461 | pim_jp_agg_remove_group(nbr->upstream_jp_agg, up); | |
462 | ||
463 | /* | |
464 | * We have detected a case where we might need | |
465 | * to rescan the inherited o_list so do it. | |
466 | */ | |
467 | if (up->channel_oil->oil_inherited_rescan) { | |
468 | pim_upstream_inherited_olist_decide(pim, up); | |
469 | up->channel_oil->oil_inherited_rescan = 0; | |
470 | } | |
471 | ||
472 | if (up->join_state == PIM_UPSTREAM_JOINED) { | |
473 | /* | |
474 | * If we come up real fast we can be here | |
475 | * where the mroute has not been installed | |
476 | * so install it. | |
477 | */ | |
478 | if (!up->channel_oil->installed) | |
479 | pim_mroute_add(up->channel_oil, __PRETTY_FUNCTION__); | |
480 | ||
481 | /* | |
482 | * RFC 4601: 4.5.7. Sending (S,G) | |
483 | * Join/Prune Messages | |
484 | * | |
485 | * Transitions from Joined State | |
486 | * | |
487 | * RPF'(S,G) changes not due to an Assert | |
488 | * | |
489 | * The upstream (S,G) state machine remains | |
490 | * in Joined state. Send Join(S,G) to the new | |
491 | * upstream neighbor, which is the new value | |
492 | * of RPF'(S,G). Send Prune(S,G) to the old | |
493 | * upstream neighbor, which is the old value | |
494 | * of RPF'(S,G). Set the Join Timer (JT) to | |
495 | * expire after t_periodic seconds. | |
496 | */ | |
497 | pim_jp_agg_switch_interface(old, &up->rpf, up); | |
498 | ||
499 | pim_upstream_join_timer_restart(up, old); | |
500 | } /* up->join_state == PIM_UPSTREAM_JOINED */ | |
501 | ||
502 | /* FIXME can join_desired actually be changed by | |
503 | pim_rpf_update() | |
504 | returning PIM_RPF_CHANGED ? */ | |
505 | pim_upstream_update_join_desired(pim, up); | |
506 | } | |
507 | ||
da11e325 | 508 | static void scan_upstream_rpf_cache(struct pim_instance *pim) |
12e41d03 | 509 | { |
d62a17ae | 510 | struct listnode *up_node; |
d62a17ae | 511 | struct listnode *up_nextnode; |
d62a17ae | 512 | struct pim_upstream *up; |
d62a17ae | 513 | |
da11e325 DS |
514 | for (ALL_LIST_ELEMENTS(pim->upstream_list, up_node, up_nextnode, up)) { |
515 | enum pim_rpf_result rpf_result; | |
516 | struct pim_rpf old; | |
517 | struct prefix nht_p; | |
d62a17ae | 518 | |
da11e325 DS |
519 | nht_p.family = AF_INET; |
520 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
521 | nht_p.u.prefix4.s_addr = up->upstream_addr.s_addr; | |
522 | pim_resolve_upstream_nh(pim, &nht_p); | |
d62a17ae | 523 | |
da11e325 DS |
524 | old.source_nexthop.interface = up->rpf.source_nexthop.interface; |
525 | old.source_nexthop.nbr = up->rpf.source_nexthop.nbr; | |
526 | rpf_result = pim_rpf_update(pim, up, &old, 0); | |
d62a17ae | 527 | |
da11e325 DS |
528 | if (rpf_result == PIM_RPF_FAILURE) |
529 | continue; | |
d62a17ae | 530 | |
cc67ccf9 DS |
531 | if (rpf_result == PIM_RPF_CHANGED) |
532 | pim_zebra_upstream_rpf_changed(pim, up, &old); | |
da11e325 DS |
533 | |
534 | } /* for (qpim_upstream_list) */ | |
535 | ||
74389231 | 536 | pim_zebra_update_all_interfaces(pim); |
12e41d03 DL |
537 | } |
538 | ||
d62a17ae | 539 | void pim_scan_individual_oil(struct channel_oil *c_oil, int in_vif_index) |
12e41d03 | 540 | { |
d62a17ae | 541 | struct in_addr vif_source; |
542 | int input_iface_vif_index; | |
543 | int old_vif_index; | |
544 | ||
d9c9a9ee DS |
545 | if (!pim_rp_set_upstream_addr(c_oil->pim, &vif_source, |
546 | c_oil->oil.mfcc_origin, | |
d62a17ae | 547 | c_oil->oil.mfcc_mcastgrp)) |
548 | return; | |
549 | ||
550 | if (in_vif_index) | |
551 | input_iface_vif_index = in_vif_index; | |
552 | else { | |
553 | struct prefix src, grp; | |
554 | ||
555 | src.family = AF_INET; | |
556 | src.prefixlen = IPV4_MAX_BITLEN; | |
557 | src.u.prefix4 = vif_source; | |
558 | grp.family = AF_INET; | |
559 | grp.prefixlen = IPV4_MAX_BITLEN; | |
560 | grp.u.prefix4 = c_oil->oil.mfcc_mcastgrp; | |
561 | ||
562 | if (PIM_DEBUG_ZEBRA) { | |
563 | char source_str[INET_ADDRSTRLEN]; | |
564 | char group_str[INET_ADDRSTRLEN]; | |
565 | pim_inet4_dump("<source?>", c_oil->oil.mfcc_origin, | |
566 | source_str, sizeof(source_str)); | |
567 | pim_inet4_dump("<group?>", c_oil->oil.mfcc_mcastgrp, | |
568 | group_str, sizeof(group_str)); | |
569 | zlog_debug( | |
a895ac30 | 570 | "%s: channel_oil (%s,%s) upstream info is not present.", |
d62a17ae | 571 | __PRETTY_FUNCTION__, source_str, group_str); |
572 | } | |
573 | input_iface_vif_index = pim_ecmp_fib_lookup_if_vif_index( | |
b938537b | 574 | c_oil->pim, &src, &grp); |
d62a17ae | 575 | } |
576 | ||
577 | if (input_iface_vif_index < 1) { | |
578 | if (PIM_DEBUG_ZEBRA) { | |
579 | char source_str[INET_ADDRSTRLEN]; | |
580 | char group_str[INET_ADDRSTRLEN]; | |
581 | pim_inet4_dump("<source?>", c_oil->oil.mfcc_origin, | |
582 | source_str, sizeof(source_str)); | |
583 | pim_inet4_dump("<group?>", c_oil->oil.mfcc_mcastgrp, | |
584 | group_str, sizeof(group_str)); | |
585 | zlog_debug( | |
586 | "%s %s: could not find input interface(%d) for (S,G)=(%s,%s)", | |
587 | __FILE__, __PRETTY_FUNCTION__, | |
588 | c_oil->oil.mfcc_parent, source_str, group_str); | |
589 | } | |
590 | pim_mroute_del(c_oil, __PRETTY_FUNCTION__); | |
591 | return; | |
592 | } | |
593 | ||
594 | if (input_iface_vif_index == c_oil->oil.mfcc_parent) { | |
595 | if (!c_oil->installed) | |
596 | pim_mroute_add(c_oil, __PRETTY_FUNCTION__); | |
597 | ||
598 | /* RPF unchanged */ | |
599 | return; | |
600 | } | |
601 | ||
602 | if (PIM_DEBUG_ZEBRA) { | |
7cfc7bcf DS |
603 | struct interface *old_iif = pim_if_find_by_vif_index( |
604 | c_oil->pim, c_oil->oil.mfcc_parent); | |
605 | struct interface *new_iif = pim_if_find_by_vif_index( | |
606 | c_oil->pim, input_iface_vif_index); | |
d62a17ae | 607 | char source_str[INET_ADDRSTRLEN]; |
608 | char group_str[INET_ADDRSTRLEN]; | |
609 | pim_inet4_dump("<source?>", c_oil->oil.mfcc_origin, source_str, | |
610 | sizeof(source_str)); | |
611 | pim_inet4_dump("<group?>", c_oil->oil.mfcc_mcastgrp, group_str, | |
612 | sizeof(group_str)); | |
613 | zlog_debug( | |
614 | "%s %s: (S,G)=(%s,%s) input interface changed from %s vif_index=%d to %s vif_index=%d", | |
615 | __FILE__, __PRETTY_FUNCTION__, source_str, group_str, | |
97f03dde DS |
616 | (old_iif) ? old_iif->name : "<old_iif?>", |
617 | c_oil->oil.mfcc_parent, | |
618 | (new_iif) ? new_iif->name : "<new_iif?>", | |
d62a17ae | 619 | input_iface_vif_index); |
620 | } | |
621 | ||
622 | /* new iif loops to existing oif ? */ | |
623 | if (c_oil->oil.mfcc_ttls[input_iface_vif_index]) { | |
7cfc7bcf DS |
624 | struct interface *new_iif = pim_if_find_by_vif_index( |
625 | c_oil->pim, input_iface_vif_index); | |
d62a17ae | 626 | |
627 | if (PIM_DEBUG_ZEBRA) { | |
628 | char source_str[INET_ADDRSTRLEN]; | |
629 | char group_str[INET_ADDRSTRLEN]; | |
630 | pim_inet4_dump("<source?>", c_oil->oil.mfcc_origin, | |
631 | source_str, sizeof(source_str)); | |
632 | pim_inet4_dump("<group?>", c_oil->oil.mfcc_mcastgrp, | |
633 | group_str, sizeof(group_str)); | |
634 | zlog_debug( | |
635 | "%s %s: (S,G)=(%s,%s) new iif loops to existing oif: %s vif_index=%d", | |
636 | __FILE__, __PRETTY_FUNCTION__, source_str, | |
97f03dde DS |
637 | group_str, |
638 | (new_iif) ? new_iif->name : "<new_iif?>", | |
d62a17ae | 639 | input_iface_vif_index); |
640 | } | |
641 | } | |
642 | ||
643 | /* update iif vif_index */ | |
644 | old_vif_index = c_oil->oil.mfcc_parent; | |
645 | c_oil->oil.mfcc_parent = input_iface_vif_index; | |
646 | ||
647 | /* update kernel multicast forwarding cache (MFC) */ | |
648 | if (pim_mroute_add(c_oil, __PRETTY_FUNCTION__)) { | |
649 | if (PIM_DEBUG_MROUTE) { | |
650 | /* just log warning */ | |
7cfc7bcf DS |
651 | struct interface *old_iif = pim_if_find_by_vif_index( |
652 | c_oil->pim, old_vif_index); | |
653 | struct interface *new_iif = pim_if_find_by_vif_index( | |
654 | c_oil->pim, input_iface_vif_index); | |
d62a17ae | 655 | char source_str[INET_ADDRSTRLEN]; |
656 | char group_str[INET_ADDRSTRLEN]; | |
657 | pim_inet4_dump("<source?>", c_oil->oil.mfcc_origin, | |
658 | source_str, sizeof(source_str)); | |
659 | pim_inet4_dump("<group?>", c_oil->oil.mfcc_mcastgrp, | |
660 | group_str, sizeof(group_str)); | |
661 | zlog_debug( | |
662 | "%s %s: (S,G)=(%s,%s) failure updating input interface from %s vif_index=%d to %s vif_index=%d", | |
663 | __FILE__, __PRETTY_FUNCTION__, source_str, | |
664 | group_str, | |
665 | old_iif ? old_iif->name : "<old_iif?>", | |
666 | c_oil->oil.mfcc_parent, | |
667 | new_iif ? new_iif->name : "<new_iif?>", | |
668 | input_iface_vif_index); | |
669 | } | |
670 | } | |
8a67a996 DS |
671 | } |
672 | ||
da11e325 | 673 | void pim_scan_oil(struct pim_instance *pim) |
8a67a996 | 674 | { |
d62a17ae | 675 | struct listnode *node; |
676 | struct listnode *nextnode; | |
677 | struct channel_oil *c_oil; | |
678 | ifindex_t ifindex; | |
679 | int vif_index = 0; | |
680 | ||
bfc92019 DS |
681 | pim->scan_oil_last = pim_time_monotonic_sec(); |
682 | ++pim->scan_oil_events; | |
d62a17ae | 683 | |
da11e325 DS |
684 | for (ALL_LIST_ELEMENTS(pim->channel_oil_list, node, nextnode, c_oil)) { |
685 | if (c_oil->up && c_oil->up->rpf.source_nexthop.interface) { | |
686 | ifindex = c_oil->up->rpf.source_nexthop | |
687 | .interface->ifindex; | |
688 | vif_index = | |
689 | pim_if_find_vifindex_by_ifindex(pim, ifindex); | |
690 | /* Pass Current selected NH vif index to mroute | |
691 | * download */ | |
692 | if (vif_index) | |
693 | pim_scan_individual_oil(c_oil, vif_index); | |
694 | } else | |
695 | pim_scan_individual_oil(c_oil, 0); | |
d62a17ae | 696 | } |
12e41d03 DL |
697 | } |
698 | ||
699 | static int on_rpf_cache_refresh(struct thread *t) | |
700 | { | |
da11e325 DS |
701 | struct pim_instance *pim = THREAD_ARG(t); |
702 | ||
d62a17ae | 703 | /* update PIM protocol state */ |
da11e325 | 704 | scan_upstream_rpf_cache(pim); |
12e41d03 | 705 | |
d62a17ae | 706 | /* update kernel multicast forwarding cache (MFC) */ |
da11e325 | 707 | pim_scan_oil(pim); |
12e41d03 | 708 | |
bfc92019 DS |
709 | pim->rpf_cache_refresh_last = pim_time_monotonic_sec(); |
710 | ++pim->rpf_cache_refresh_events; | |
12e41d03 | 711 | |
d62a17ae | 712 | // It is called as part of pim_neighbor_add |
713 | // pim_rp_setup (); | |
714 | return 0; | |
12e41d03 DL |
715 | } |
716 | ||
da11e325 | 717 | void sched_rpf_cache_refresh(struct pim_instance *pim) |
12e41d03 | 718 | { |
bfc92019 | 719 | ++pim->rpf_cache_refresh_requests; |
12e41d03 | 720 | |
bfc92019 | 721 | pim_rpf_set_refresh_time(pim); |
e71bf8f7 | 722 | |
da11e325 | 723 | if (pim->rpf_cache_refresher) { |
d62a17ae | 724 | /* Refresh timer is already running */ |
725 | return; | |
726 | } | |
12e41d03 | 727 | |
d62a17ae | 728 | /* Start refresh timer */ |
12e41d03 | 729 | |
d62a17ae | 730 | if (PIM_DEBUG_ZEBRA) { |
731 | zlog_debug("%s: triggering %ld msec timer", __PRETTY_FUNCTION__, | |
732 | qpim_rpf_cache_refresh_delay_msec); | |
733 | } | |
12e41d03 | 734 | |
da11e325 | 735 | thread_add_timer_msec(master, on_rpf_cache_refresh, pim, |
d62a17ae | 736 | qpim_rpf_cache_refresh_delay_msec, |
da11e325 | 737 | &pim->rpf_cache_refresher); |
12e41d03 DL |
738 | } |
739 | ||
d62a17ae | 740 | static void pim_zebra_connected(struct zclient *zclient) |
48e8451b | 741 | { |
d62a17ae | 742 | /* Send the client registration */ |
743 | bfd_client_sendmsg(zclient, ZEBRA_BFD_CLIENT_REGISTER); | |
ba4eb1bc | 744 | |
0708beb1 | 745 | zclient_send_reg_requests(zclient, pimg->vrf_id); |
48e8451b | 746 | } |
8711a53d | 747 | |
eb05883f | 748 | void pim_zebra_init(void) |
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) { |
87270023 | 765 | zlog_notice("%s: zclient socket initialized", |
d62a17ae | 766 | __PRETTY_FUNCTION__); |
767 | } | |
768 | ||
769 | zclient_lookup_new(); | |
12e41d03 DL |
770 | } |
771 | ||
6f932b0c DS |
772 | void igmp_anysource_forward_start(struct pim_instance *pim, |
773 | struct igmp_group *group) | |
12e41d03 | 774 | { |
d62a17ae | 775 | struct igmp_source *source; |
776 | struct in_addr src_addr = {.s_addr = 0}; | |
777 | /* Any source (*,G) is forwarded only if mode is EXCLUDE {empty} */ | |
778 | zassert(group->group_filtermode_isexcl); | |
779 | zassert(listcount(group->group_source_list) < 1); | |
780 | ||
781 | source = source_new(group, src_addr); | |
782 | if (!source) { | |
783 | zlog_warn("%s: Failure to create * source", | |
784 | __PRETTY_FUNCTION__); | |
785 | return; | |
786 | } | |
787 | ||
6f932b0c | 788 | igmp_source_forward_start(pim, source); |
12e41d03 DL |
789 | } |
790 | ||
791 | void igmp_anysource_forward_stop(struct igmp_group *group) | |
792 | { | |
d62a17ae | 793 | struct igmp_source *source; |
794 | struct in_addr star = {.s_addr = 0}; | |
12e41d03 | 795 | |
d62a17ae | 796 | source = igmp_find_source_by_addr(group, star); |
797 | if (source) | |
798 | igmp_source_forward_stop(source); | |
12e41d03 DL |
799 | } |
800 | ||
6f439a70 DS |
801 | static void igmp_source_forward_reevaluate_one(struct pim_instance *pim, |
802 | struct igmp_source *source) | |
15a5dafe | 803 | { |
d62a17ae | 804 | struct prefix_sg sg; |
805 | struct igmp_group *group = source->source_group; | |
806 | struct pim_ifchannel *ch; | |
807 | ||
808 | if ((source->source_addr.s_addr != INADDR_ANY) | |
809 | || !IGMP_SOURCE_TEST_FORWARDING(source->source_flags)) | |
810 | return; | |
811 | ||
812 | memset(&sg, 0, sizeof(struct prefix_sg)); | |
813 | sg.src = source->source_addr; | |
814 | sg.grp = group->group_addr; | |
815 | ||
816 | ch = pim_ifchannel_find(group->group_igmp_sock->interface, &sg); | |
6f439a70 | 817 | if (pim_is_grp_ssm(pim, group->group_addr)) { |
d62a17ae | 818 | /* If SSM group withdraw local membership */ |
819 | if (ch | |
820 | && (ch->local_ifmembership == PIM_IFMEMBERSHIP_INCLUDE)) { | |
821 | if (PIM_DEBUG_PIM_EVENTS) | |
822 | zlog_debug( | |
823 | "local membership del for %s as G is now SSM", | |
824 | pim_str_sg_dump(&sg)); | |
825 | pim_ifchannel_local_membership_del( | |
826 | group->group_igmp_sock->interface, &sg); | |
827 | } | |
828 | } else { | |
829 | /* If ASM group add local membership */ | |
830 | if (!ch | |
831 | || (ch->local_ifmembership == PIM_IFMEMBERSHIP_NOINFO)) { | |
832 | if (PIM_DEBUG_PIM_EVENTS) | |
833 | zlog_debug( | |
834 | "local membership add for %s as G is now ASM", | |
835 | pim_str_sg_dump(&sg)); | |
836 | pim_ifchannel_local_membership_add( | |
837 | group->group_igmp_sock->interface, &sg); | |
838 | } | |
839 | } | |
15a5dafe | 840 | } |
841 | ||
5d59e408 | 842 | void igmp_source_forward_reevaluate_all(struct pim_instance *pim) |
15a5dafe | 843 | { |
d62a17ae | 844 | struct interface *ifp; |
845 | ||
5d59e408 DS |
846 | FOR_ALL_INTERFACES (pim->vrf, ifp) { |
847 | struct pim_interface *pim_ifp = ifp->info; | |
848 | struct listnode *sock_node; | |
849 | struct igmp_sock *igmp; | |
850 | ||
851 | if (!pim_ifp) | |
d62a17ae | 852 | continue; |
853 | ||
5d59e408 DS |
854 | /* scan igmp sockets */ |
855 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->igmp_socket_list, sock_node, | |
856 | igmp)) { | |
857 | struct listnode *grpnode; | |
858 | struct igmp_group *grp; | |
859 | ||
860 | /* scan igmp groups */ | |
861 | for (ALL_LIST_ELEMENTS_RO(igmp->igmp_group_list, | |
862 | grpnode, grp)) { | |
863 | struct listnode *srcnode; | |
864 | struct igmp_source *src; | |
865 | ||
866 | /* scan group sources */ | |
867 | for (ALL_LIST_ELEMENTS_RO( | |
868 | grp->group_source_list, srcnode, | |
869 | src)) { | |
870 | igmp_source_forward_reevaluate_one(pim, | |
871 | src); | |
872 | } /* scan group sources */ | |
873 | } /* scan igmp groups */ | |
874 | } /* scan igmp sockets */ | |
875 | } /* scan interfaces */ | |
15a5dafe | 876 | } |
877 | ||
6f932b0c DS |
878 | void igmp_source_forward_start(struct pim_instance *pim, |
879 | struct igmp_source *source) | |
12e41d03 | 880 | { |
75c61a18 | 881 | struct pim_interface *pim_oif; |
d62a17ae | 882 | struct igmp_group *group; |
883 | struct prefix_sg sg; | |
884 | int result; | |
885 | int input_iface_vif_index = 0; | |
886 | ||
887 | memset(&sg, 0, sizeof(struct prefix_sg)); | |
888 | sg.src = source->source_addr; | |
889 | sg.grp = source->source_group->group_addr; | |
890 | ||
891 | if (PIM_DEBUG_IGMP_TRACE) { | |
892 | zlog_debug( | |
893 | "%s: (S,G)=%s igmp_sock=%d oif=%s fwd=%d", | |
894 | __PRETTY_FUNCTION__, pim_str_sg_dump(&sg), | |
895 | source->source_group->group_igmp_sock->fd, | |
896 | source->source_group->group_igmp_sock->interface->name, | |
897 | IGMP_SOURCE_TEST_FORWARDING(source->source_flags)); | |
898 | } | |
899 | ||
900 | /* Prevent IGMP interface from installing multicast route multiple | |
901 | times */ | |
902 | if (IGMP_SOURCE_TEST_FORWARDING(source->source_flags)) { | |
903 | return; | |
8711a53d | 904 | } |
d62a17ae | 905 | |
906 | group = source->source_group; | |
75c61a18 DS |
907 | pim_oif = group->group_igmp_sock->interface->info; |
908 | if (!pim_oif) { | |
909 | if (PIM_DEBUG_IGMP_TRACE) { | |
910 | zlog_debug( | |
911 | "%s: multicast not enabled on oif=%s ?", | |
912 | __PRETTY_FUNCTION__, | |
913 | source->source_group->group_igmp_sock | |
914 | ->interface->name); | |
915 | } | |
916 | return; | |
917 | } | |
d62a17ae | 918 | |
919 | if (!source->source_channel_oil) { | |
920 | struct in_addr vif_source; | |
d62a17ae | 921 | struct prefix nht_p, src, grp; |
d62a17ae | 922 | struct pim_nexthop_cache out_pnc; |
923 | struct pim_nexthop nexthop; | |
924 | struct pim_upstream *up = NULL; | |
925 | ||
6f932b0c | 926 | if (!pim_rp_set_upstream_addr(pim, &vif_source, |
d9c9a9ee | 927 | source->source_addr, sg.grp)) |
d62a17ae | 928 | return; |
929 | ||
930 | /* Register addr with Zebra NHT */ | |
931 | nht_p.family = AF_INET; | |
932 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
933 | nht_p.u.prefix4 = vif_source; | |
934 | memset(&out_pnc, 0, sizeof(struct pim_nexthop_cache)); | |
935 | ||
936 | src.family = AF_INET; | |
937 | src.prefixlen = IPV4_MAX_BITLEN; | |
938 | src.u.prefix4 = vif_source; // RP or Src address | |
939 | grp.family = AF_INET; | |
940 | grp.prefixlen = IPV4_MAX_BITLEN; | |
941 | grp.u.prefix4 = sg.grp; | |
942 | ||
6f932b0c | 943 | if (pim_find_or_track_nexthop(pim, &nht_p, NULL, NULL, |
25bdac42 | 944 | &out_pnc)) { |
d62a17ae | 945 | if (out_pnc.nexthop_num) { |
6f932b0c | 946 | up = pim_upstream_find(pim, &sg); |
cb9c7c50 | 947 | memset(&nexthop, 0, sizeof(nexthop)); |
d62a17ae | 948 | if (up) |
949 | memcpy(&nexthop, | |
950 | &up->rpf.source_nexthop, | |
951 | sizeof(struct pim_nexthop)); | |
6f932b0c DS |
952 | pim_ecmp_nexthop_search(pim, &out_pnc, &nexthop, |
953 | &src, &grp, 0); | |
d62a17ae | 954 | if (nexthop.interface) |
955 | input_iface_vif_index = | |
956 | pim_if_find_vifindex_by_ifindex( | |
6f932b0c | 957 | pim, |
d62a17ae | 958 | nexthop.interface->ifindex); |
959 | } else { | |
960 | if (PIM_DEBUG_ZEBRA) { | |
961 | char buf1[INET_ADDRSTRLEN]; | |
962 | char buf2[INET_ADDRSTRLEN]; | |
963 | pim_inet4_dump("<source?>", | |
964 | nht_p.u.prefix4, buf1, | |
965 | sizeof(buf1)); | |
966 | pim_inet4_dump("<source?>", | |
967 | grp.u.prefix4, buf2, | |
968 | sizeof(buf2)); | |
969 | zlog_debug( | |
970 | "%s: NHT Nexthop not found for addr %s grp %s", | |
971 | __PRETTY_FUNCTION__, buf1, | |
972 | buf2); | |
973 | } | |
974 | } | |
975 | } else | |
976 | input_iface_vif_index = | |
b938537b DS |
977 | pim_ecmp_fib_lookup_if_vif_index(pim, &src, |
978 | &grp); | |
d62a17ae | 979 | |
980 | if (PIM_DEBUG_ZEBRA) { | |
981 | char buf2[INET_ADDRSTRLEN]; | |
982 | pim_inet4_dump("<source?>", vif_source, buf2, | |
983 | sizeof(buf2)); | |
984 | zlog_debug("%s: NHT %s vif_source %s vif_index:%d ", | |
985 | __PRETTY_FUNCTION__, pim_str_sg_dump(&sg), | |
986 | buf2, input_iface_vif_index); | |
987 | } | |
988 | ||
989 | if (input_iface_vif_index < 1) { | |
990 | if (PIM_DEBUG_IGMP_TRACE) { | |
991 | char source_str[INET_ADDRSTRLEN]; | |
992 | pim_inet4_dump("<source?>", source->source_addr, | |
993 | source_str, sizeof(source_str)); | |
994 | zlog_debug( | |
995 | "%s %s: could not find input interface for source %s", | |
996 | __FILE__, __PRETTY_FUNCTION__, | |
997 | source_str); | |
998 | } | |
999 | return; | |
1000 | } | |
1001 | ||
1002 | /* | |
1003 | Protect IGMP against adding looped MFC entries created by both | |
1004 | source and receiver attached to the same interface. See TODO | |
1005 | T22. | |
1006 | */ | |
d62a17ae | 1007 | if (input_iface_vif_index == pim_oif->mroute_vif_index) { |
1008 | /* ignore request for looped MFC entry */ | |
1009 | if (PIM_DEBUG_IGMP_TRACE) { | |
1010 | zlog_debug( | |
1011 | "%s: ignoring request for looped MFC entry (S,G)=%s: igmp_sock=%d oif=%s vif_index=%d", | |
1012 | __PRETTY_FUNCTION__, | |
1013 | pim_str_sg_dump(&sg), | |
1014 | source->source_group->group_igmp_sock | |
1015 | ->fd, | |
1016 | source->source_group->group_igmp_sock | |
1017 | ->interface->name, | |
1018 | input_iface_vif_index); | |
1019 | } | |
1020 | return; | |
1021 | } | |
1022 | ||
1023 | source->source_channel_oil = | |
6f932b0c | 1024 | pim_channel_oil_add(pim, &sg, input_iface_vif_index); |
d62a17ae | 1025 | if (!source->source_channel_oil) { |
1026 | if (PIM_DEBUG_IGMP_TRACE) { | |
1027 | zlog_debug( | |
1028 | "%s %s: could not create OIL for channel (S,G)=%s", | |
1029 | __FILE__, __PRETTY_FUNCTION__, | |
1030 | pim_str_sg_dump(&sg)); | |
1031 | } | |
1032 | return; | |
1033 | } | |
8711a53d | 1034 | } |
d62a17ae | 1035 | |
1036 | result = pim_channel_add_oif(source->source_channel_oil, | |
1037 | group->group_igmp_sock->interface, | |
1038 | PIM_OIF_FLAG_PROTO_IGMP); | |
1039 | if (result) { | |
1040 | if (PIM_DEBUG_MROUTE) { | |
1041 | zlog_warn("%s: add_oif() failed with return=%d", | |
1042 | __func__, result); | |
1043 | } | |
1044 | return; | |
8711a53d | 1045 | } |
d62a17ae | 1046 | |
75c61a18 DS |
1047 | if (!(PIM_I_am_DR(pim_oif))) |
1048 | return; | |
1049 | ||
d62a17ae | 1050 | /* |
1051 | Feed IGMPv3-gathered local membership information into PIM | |
1052 | per-interface (S,G) state. | |
1053 | */ | |
1054 | if (!pim_ifchannel_local_membership_add( | |
75c61a18 | 1055 | group->group_igmp_sock->interface, &sg)) { |
d62a17ae | 1056 | if (PIM_DEBUG_MROUTE) |
1057 | zlog_warn("%s: Failure to add local membership for %s", | |
1058 | __PRETTY_FUNCTION__, pim_str_sg_dump(&sg)); | |
1059 | return; | |
1060 | } | |
1061 | ||
1062 | IGMP_SOURCE_DO_FORWARDING(source->source_flags); | |
12e41d03 DL |
1063 | } |
1064 | ||
1065 | /* | |
1066 | igmp_source_forward_stop: stop fowarding, but keep the source | |
1067 | igmp_source_delete: stop fowarding, and delete the source | |
1068 | */ | |
1069 | void igmp_source_forward_stop(struct igmp_source *source) | |
1070 | { | |
d62a17ae | 1071 | struct igmp_group *group; |
1072 | struct prefix_sg sg; | |
1073 | int result; | |
1074 | ||
1075 | memset(&sg, 0, sizeof(struct prefix_sg)); | |
1076 | sg.src = source->source_addr; | |
1077 | sg.grp = source->source_group->group_addr; | |
1078 | ||
1079 | if (PIM_DEBUG_IGMP_TRACE) { | |
1080 | zlog_debug( | |
1081 | "%s: (S,G)=%s igmp_sock=%d oif=%s fwd=%d", | |
1082 | __PRETTY_FUNCTION__, pim_str_sg_dump(&sg), | |
1083 | source->source_group->group_igmp_sock->fd, | |
1084 | source->source_group->group_igmp_sock->interface->name, | |
1085 | IGMP_SOURCE_TEST_FORWARDING(source->source_flags)); | |
1086 | } | |
1087 | ||
1088 | /* Prevent IGMP interface from removing multicast route multiple | |
1089 | times */ | |
1090 | if (!IGMP_SOURCE_TEST_FORWARDING(source->source_flags)) { | |
1091 | return; | |
1092 | } | |
1093 | ||
1094 | group = source->source_group; | |
1095 | ||
1096 | /* | |
1097 | It appears that in certain circumstances that | |
1098 | igmp_source_forward_stop is called when IGMP forwarding | |
1099 | was not enabled in oif_flags for this outgoing interface. | |
1100 | Possibly because of multiple calls. When that happens, we | |
1101 | enter the below if statement and this function returns early | |
1102 | which in turn triggers the calling function to assert. | |
1103 | Making the call to pim_channel_del_oif and ignoring the return code | |
1104 | fixes the issue without ill effect, similar to | |
1105 | pim_forward_stop below. | |
1106 | */ | |
1107 | result = pim_channel_del_oif(source->source_channel_oil, | |
1108 | group->group_igmp_sock->interface, | |
1109 | PIM_OIF_FLAG_PROTO_IGMP); | |
1110 | if (result) { | |
1111 | if (PIM_DEBUG_IGMP_TRACE) | |
1112 | zlog_debug( | |
1113 | "%s: pim_channel_del_oif() failed with return=%d", | |
1114 | __func__, result); | |
1115 | return; | |
1116 | } | |
1117 | ||
1118 | /* | |
1119 | Feed IGMPv3-gathered local membership information into PIM | |
1120 | per-interface (S,G) state. | |
1121 | */ | |
1122 | pim_ifchannel_local_membership_del(group->group_igmp_sock->interface, | |
1123 | &sg); | |
1124 | ||
1125 | IGMP_SOURCE_DONT_FORWARDING(source->source_flags); | |
12e41d03 DL |
1126 | } |
1127 | ||
1128 | void pim_forward_start(struct pim_ifchannel *ch) | |
1129 | { | |
d62a17ae | 1130 | struct pim_upstream *up = ch->upstream; |
1131 | uint32_t mask = PIM_OIF_FLAG_PROTO_PIM; | |
1132 | int input_iface_vif_index = 0; | |
6f932b0c DS |
1133 | struct pim_instance *pim; |
1134 | struct pim_interface *pim_ifp; | |
1135 | ||
1136 | pim_ifp = ch->interface->info; | |
1137 | pim = pim_ifp->pim; | |
d62a17ae | 1138 | |
1139 | if (PIM_DEBUG_PIM_TRACE) { | |
1140 | char source_str[INET_ADDRSTRLEN]; | |
1141 | char group_str[INET_ADDRSTRLEN]; | |
1142 | char upstream_str[INET_ADDRSTRLEN]; | |
1143 | ||
1144 | pim_inet4_dump("<source?>", ch->sg.src, source_str, | |
1145 | sizeof(source_str)); | |
1146 | pim_inet4_dump("<group?>", ch->sg.grp, group_str, | |
1147 | sizeof(group_str)); | |
1148 | pim_inet4_dump("<upstream?>", up->upstream_addr, upstream_str, | |
1149 | sizeof(upstream_str)); | |
1150 | zlog_debug("%s: (S,G)=(%s,%s) oif=%s (%s)", __PRETTY_FUNCTION__, | |
1151 | source_str, group_str, ch->interface->name, | |
1152 | upstream_str); | |
1153 | } | |
1154 | ||
1155 | /* Resolve IIF for upstream as mroute_del sets mfcc_parent to MAXVIFS, | |
1156 | as part of mroute_del called by pim_forward_stop. | |
1157 | */ | |
1158 | if (!up->channel_oil | |
1159 | || (up->channel_oil | |
1160 | && up->channel_oil->oil.mfcc_parent >= MAXVIFS)) { | |
1161 | struct prefix nht_p, src, grp; | |
d62a17ae | 1162 | struct pim_nexthop_cache out_pnc; |
1163 | ||
1164 | /* Register addr with Zebra NHT */ | |
1165 | nht_p.family = AF_INET; | |
1166 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
b938537b | 1167 | nht_p.u.prefix4 = up->upstream_addr; |
d62a17ae | 1168 | grp.family = AF_INET; |
1169 | grp.prefixlen = IPV4_MAX_BITLEN; | |
1170 | grp.u.prefix4 = up->sg.grp; | |
1171 | memset(&out_pnc, 0, sizeof(struct pim_nexthop_cache)); | |
1172 | ||
6f932b0c | 1173 | if (pim_find_or_track_nexthop(pim, &nht_p, NULL, NULL, |
25bdac42 | 1174 | &out_pnc)) { |
d62a17ae | 1175 | if (out_pnc.nexthop_num) { |
1176 | src.family = AF_INET; | |
1177 | src.prefixlen = IPV4_MAX_BITLEN; | |
1178 | src.u.prefix4 = | |
1179 | up->upstream_addr; // RP or Src address | |
1180 | grp.family = AF_INET; | |
1181 | grp.prefixlen = IPV4_MAX_BITLEN; | |
1182 | grp.u.prefix4 = up->sg.grp; | |
1183 | // Compute PIM RPF using Cached nexthop | |
1184 | if (pim_ecmp_nexthop_search( | |
6f932b0c | 1185 | pim, &out_pnc, |
25b787a2 DS |
1186 | &up->rpf.source_nexthop, &src, &grp, |
1187 | 0)) | |
d62a17ae | 1188 | input_iface_vif_index = |
1189 | pim_if_find_vifindex_by_ifindex( | |
6f932b0c | 1190 | pim, |
d62a17ae | 1191 | up->rpf.source_nexthop |
1192 | .interface->ifindex); | |
1193 | else { | |
1194 | if (PIM_DEBUG_TRACE) | |
1195 | zlog_debug( | |
1196 | "%s: Nexthop selection failed for %s ", | |
1197 | __PRETTY_FUNCTION__, | |
1198 | up->sg_str); | |
1199 | } | |
1200 | } else { | |
1201 | if (PIM_DEBUG_ZEBRA) { | |
1202 | char buf1[INET_ADDRSTRLEN]; | |
1203 | char buf2[INET_ADDRSTRLEN]; | |
1204 | pim_inet4_dump("<source?>", | |
1205 | nht_p.u.prefix4, buf1, | |
1206 | sizeof(buf1)); | |
1207 | pim_inet4_dump("<source?>", | |
1208 | grp.u.prefix4, buf2, | |
1209 | sizeof(buf2)); | |
1210 | zlog_debug( | |
1211 | "%s: NHT pnc is NULL for addr %s grp %s", | |
1212 | __PRETTY_FUNCTION__, buf1, | |
1213 | buf2); | |
1214 | } | |
1215 | } | |
1216 | } else | |
1217 | input_iface_vif_index = | |
b938537b DS |
1218 | pim_ecmp_fib_lookup_if_vif_index(pim, &src, |
1219 | &grp); | |
d62a17ae | 1220 | |
1221 | if (input_iface_vif_index < 1) { | |
1222 | if (PIM_DEBUG_PIM_TRACE) { | |
1223 | char source_str[INET_ADDRSTRLEN]; | |
1224 | pim_inet4_dump("<source?>", up->sg.src, | |
1225 | source_str, sizeof(source_str)); | |
1226 | zlog_debug( | |
1227 | "%s %s: could not find input interface for source %s", | |
1228 | __FILE__, __PRETTY_FUNCTION__, | |
1229 | source_str); | |
1230 | } | |
1231 | return; | |
1232 | } | |
1233 | if (PIM_DEBUG_TRACE) { | |
7cfc7bcf | 1234 | struct interface *in_intf = pim_if_find_by_vif_index( |
6f932b0c | 1235 | pim, input_iface_vif_index); |
d62a17ae | 1236 | zlog_debug( |
1237 | "%s: Update channel_oil IIF %s VIFI %d entry %s ", | |
1238 | __PRETTY_FUNCTION__, | |
1239 | in_intf ? in_intf->name : "NIL", | |
1240 | input_iface_vif_index, up->sg_str); | |
1241 | } | |
6f932b0c | 1242 | up->channel_oil = pim_channel_oil_add(pim, &up->sg, |
611925dc | 1243 | input_iface_vif_index); |
d62a17ae | 1244 | if (!up->channel_oil) { |
1245 | if (PIM_DEBUG_PIM_TRACE) | |
1246 | zlog_debug( | |
1247 | "%s %s: could not create OIL for channel (S,G)=%s", | |
1248 | __FILE__, __PRETTY_FUNCTION__, | |
1249 | up->sg_str); | |
1250 | return; | |
1251 | } | |
1252 | } | |
1253 | ||
1254 | if (up->flags & PIM_UPSTREAM_FLAG_MASK_SRC_IGMP) | |
1255 | mask = PIM_OIF_FLAG_PROTO_IGMP; | |
1256 | ||
1257 | pim_channel_add_oif(up->channel_oil, ch->interface, mask); | |
12e41d03 DL |
1258 | } |
1259 | ||
aabb9a2f | 1260 | void pim_forward_stop(struct pim_ifchannel *ch, bool install_it) |
12e41d03 | 1261 | { |
d62a17ae | 1262 | struct pim_upstream *up = ch->upstream; |
12e41d03 | 1263 | |
d62a17ae | 1264 | if (PIM_DEBUG_PIM_TRACE) { |
aabb9a2f DS |
1265 | zlog_debug("%s: (S,G)=%s oif=%s install_it: %d installed: %d", |
1266 | __PRETTY_FUNCTION__, ch->sg_str, ch->interface->name, | |
1267 | install_it, up->channel_oil->installed); | |
d62a17ae | 1268 | } |
12e41d03 | 1269 | |
d62a17ae | 1270 | pim_channel_del_oif(up->channel_oil, ch->interface, |
1271 | PIM_OIF_FLAG_PROTO_PIM); | |
aabb9a2f DS |
1272 | |
1273 | if (install_it && !up->channel_oil->installed) | |
1274 | pim_mroute_add(up->channel_oil, __PRETTY_FUNCTION__); | |
12e41d03 | 1275 | } |
8799b66b | 1276 | |
d62a17ae | 1277 | void pim_zebra_zclient_update(struct vty *vty) |
8799b66b | 1278 | { |
d62a17ae | 1279 | vty_out(vty, "Zclient update socket: "); |
1280 | ||
1281 | if (zclient) { | |
1282 | vty_out(vty, "%d failures=%d\n", zclient->sock, zclient->fail); | |
1283 | } else { | |
1284 | vty_out(vty, "<null zclient>\n"); | |
1285 | } | |
8799b66b | 1286 | } |
1bc98276 | 1287 | |
d62a17ae | 1288 | struct zclient *pim_zebra_zclient_get(void) |
1bc98276 | 1289 | { |
d62a17ae | 1290 | if (zclient) |
1291 | return zclient; | |
1292 | else | |
1293 | return NULL; | |
1bc98276 | 1294 | } |