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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 | ||
12e41d03 DL |
22 | #include "if.h" |
23 | #include "log.h" | |
24 | #include "prefix.h" | |
25 | #include "zclient.h" | |
26 | #include "stream.h" | |
27 | #include "network.h" | |
dfe43e25 DW |
28 | #include "vty.h" |
29 | #include "plist.h" | |
ba4eb1bc | 30 | #include "lib/bfd.h" |
12e41d03 DL |
31 | |
32 | #include "pimd.h" | |
33 | #include "pim_pim.h" | |
34 | #include "pim_zebra.h" | |
35 | #include "pim_iface.h" | |
36 | #include "pim_str.h" | |
37 | #include "pim_oil.h" | |
38 | #include "pim_rpf.h" | |
39 | #include "pim_time.h" | |
40 | #include "pim_join.h" | |
41 | #include "pim_zlookup.h" | |
42 | #include "pim_ifchannel.h" | |
8f5f5e91 | 43 | #include "pim_rp.h" |
2560106c | 44 | #include "pim_igmpv3.h" |
982bff89 | 45 | #include "pim_jp_agg.h" |
1bc98276 | 46 | #include "pim_nht.h" |
15a5dafe | 47 | #include "pim_ssm.h" |
af7b561b | 48 | #include "pim_vxlan.h" |
46c2687c | 49 | #include "pim_mlag.h" |
12e41d03 DL |
50 | |
51 | #undef PIM_DEBUG_IFADDR_DUMP | |
52 | #define PIM_DEBUG_IFADDR_DUMP | |
53 | ||
36b5b98f | 54 | struct zclient *zclient; |
38f4935a | 55 | |
12e41d03 | 56 | |
12e41d03 | 57 | /* Router-id update message from zebra. */ |
121f9dee | 58 | static int pim_router_id_update_zebra(ZAPI_CALLBACK_ARGS) |
12e41d03 | 59 | { |
d62a17ae | 60 | struct prefix router_id; |
12e41d03 | 61 | |
d62a17ae | 62 | zebra_router_id_update_read(zclient->ibuf, &router_id); |
12e41d03 | 63 | |
d62a17ae | 64 | return 0; |
12e41d03 DL |
65 | } |
66 | ||
121f9dee | 67 | static int pim_zebra_interface_vrf_update(ZAPI_CALLBACK_ARGS) |
ee568318 DS |
68 | { |
69 | struct interface *ifp; | |
70 | vrf_id_t new_vrf_id; | |
71 | ||
72 | ifp = zebra_interface_vrf_update_read(zclient->ibuf, vrf_id, | |
73 | &new_vrf_id); | |
74 | if (!ifp) | |
75 | return 0; | |
76 | ||
77 | if (PIM_DEBUG_ZEBRA) | |
15569c58 DA |
78 | zlog_debug("%s: %s updating from %u to %u", __func__, ifp->name, |
79 | vrf_id, new_vrf_id); | |
ee568318 | 80 | |
a36898e7 | 81 | if_update_to_new_vrf(ifp, new_vrf_id); |
ee568318 DS |
82 | |
83 | return 0; | |
84 | } | |
85 | ||
12e41d03 DL |
86 | #ifdef PIM_DEBUG_IFADDR_DUMP |
87 | static void dump_if_address(struct interface *ifp) | |
88 | { | |
d62a17ae | 89 | struct connected *ifc; |
90 | struct listnode *node; | |
91 | ||
5e81f5dd DS |
92 | zlog_debug("%s %s: interface %s addresses:", __FILE__, __func__, |
93 | ifp->name); | |
d62a17ae | 94 | |
95 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc)) { | |
96 | struct prefix *p = ifc->address; | |
97 | ||
98 | if (p->family != AF_INET) | |
99 | continue; | |
100 | ||
101 | zlog_debug("%s %s: interface %s address %s %s", __FILE__, | |
5e81f5dd | 102 | __func__, ifp->name, inet_ntoa(p->u.prefix4), |
d62a17ae | 103 | CHECK_FLAG(ifc->flags, ZEBRA_IFA_SECONDARY) |
104 | ? "secondary" | |
105 | : "primary"); | |
106 | } | |
12e41d03 DL |
107 | } |
108 | #endif | |
109 | ||
121f9dee | 110 | static int pim_zebra_if_address_add(ZAPI_CALLBACK_ARGS) |
12e41d03 | 111 | { |
d62a17ae | 112 | struct connected *c; |
113 | struct prefix *p; | |
114 | struct pim_interface *pim_ifp; | |
26bb1fd5 | 115 | struct pim_instance *pim; |
d62a17ae | 116 | |
117 | /* | |
118 | zebra api notifies address adds/dels events by using the same call | |
119 | interface_add_read below, see comments in lib/zclient.c | |
120 | ||
121 | zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_ADD, ...) | |
122 | will add address to interface list by calling | |
123 | connected_add_by_prefix() | |
124 | */ | |
121f9dee | 125 | c = zebra_interface_address_read(cmd, zclient->ibuf, vrf_id); |
d62a17ae | 126 | if (!c) |
127 | return 0; | |
128 | ||
129 | pim_ifp = c->ifp->info; | |
130 | p = c->address; | |
131 | ||
132 | if (PIM_DEBUG_ZEBRA) { | |
2dbe669b DA |
133 | zlog_debug("%s: %s(%u) connected IP address %pFX flags %u %s", |
134 | __func__, c->ifp->name, vrf_id, p, c->flags, | |
996c9314 LB |
135 | CHECK_FLAG(c->flags, ZEBRA_IFA_SECONDARY) |
136 | ? "secondary" | |
137 | : "primary"); | |
d62a17ae | 138 | |
12e41d03 | 139 | #ifdef PIM_DEBUG_IFADDR_DUMP |
d62a17ae | 140 | dump_if_address(c->ifp); |
12e41d03 | 141 | #endif |
d62a17ae | 142 | } |
12e41d03 | 143 | |
d62a17ae | 144 | if (!CHECK_FLAG(c->flags, ZEBRA_IFA_SECONDARY)) { |
145 | /* trying to add primary address */ | |
12e41d03 | 146 | |
d62a17ae | 147 | struct in_addr primary_addr = pim_find_primary_addr(c->ifp); |
148 | if (p->family != AF_INET | |
149 | || primary_addr.s_addr != p->u.prefix4.s_addr) { | |
2dbe669b | 150 | if (PIM_DEBUG_ZEBRA) |
d62a17ae | 151 | zlog_warn( |
2dbe669b DA |
152 | "%s: %s : forcing secondary flag on %pFX", |
153 | __func__, c->ifp->name, p); | |
d62a17ae | 154 | SET_FLAG(c->flags, ZEBRA_IFA_SECONDARY); |
155 | } | |
156 | } | |
12e41d03 | 157 | |
d62a17ae | 158 | pim_if_addr_add(c); |
26bb1fd5 DS |
159 | if (pim_ifp) { |
160 | pim = pim_get_pim_instance(vrf_id); | |
161 | pim_ifp->pim = pim; | |
162 | ||
d62a17ae | 163 | pim_rp_check_on_if_add(pim_ifp); |
26bb1fd5 | 164 | } |
12e41d03 | 165 | |
d62a17ae | 166 | if (if_is_loopback(c->ifp)) { |
f4e14fdb | 167 | struct vrf *vrf = vrf_lookup_by_id(VRF_DEFAULT); |
d62a17ae | 168 | struct interface *ifp; |
d8424057 | 169 | |
451fda4f | 170 | FOR_ALL_INTERFACES (vrf, ifp) { |
d62a17ae | 171 | if (!if_is_loopback(ifp) && if_is_operative(ifp)) |
172 | pim_if_addr_add_all(ifp); | |
173 | } | |
174 | } | |
d8424057 | 175 | |
d62a17ae | 176 | return 0; |
12e41d03 DL |
177 | } |
178 | ||
121f9dee | 179 | static int pim_zebra_if_address_del(ZAPI_CALLBACK_ARGS) |
12e41d03 | 180 | { |
d62a17ae | 181 | struct connected *c; |
182 | struct prefix *p; | |
fec883d9 | 183 | struct vrf *vrf = vrf_lookup_by_id(vrf_id); |
819f099b DS |
184 | struct pim_instance *pim; |
185 | ||
186 | if (!vrf) | |
187 | return 0; | |
188 | pim = vrf->info; | |
d62a17ae | 189 | |
190 | /* | |
191 | zebra api notifies address adds/dels events by using the same call | |
192 | interface_add_read below, see comments in lib/zclient.c | |
193 | ||
194 | zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_DELETE, ...) | |
195 | will remove address from interface list by calling | |
196 | connected_delete_by_prefix() | |
197 | */ | |
121f9dee | 198 | c = zebra_interface_address_read(cmd, zclient->ibuf, vrf_id); |
d62a17ae | 199 | if (!c) |
200 | return 0; | |
201 | ||
202 | p = c->address; | |
203 | if (p->family == AF_INET) { | |
204 | if (PIM_DEBUG_ZEBRA) { | |
d62a17ae | 205 | zlog_debug( |
2dbe669b DA |
206 | "%s: %s(%u) disconnected IP address %pFX flags %u %s", |
207 | __func__, c->ifp->name, vrf_id, p, c->flags, | |
d62a17ae | 208 | CHECK_FLAG(c->flags, ZEBRA_IFA_SECONDARY) |
209 | ? "secondary" | |
210 | : "primary"); | |
6233f087 | 211 | |
12e41d03 | 212 | #ifdef PIM_DEBUG_IFADDR_DUMP |
d62a17ae | 213 | dump_if_address(c->ifp); |
12e41d03 | 214 | #endif |
d62a17ae | 215 | } |
12e41d03 | 216 | |
d62a17ae | 217 | pim_if_addr_del(c, 0); |
fec883d9 DS |
218 | pim_rp_setup(pim); |
219 | pim_i_am_rp_re_evaluate(pim); | |
d62a17ae | 220 | } |
6233f087 | 221 | |
721c0857 | 222 | connected_free(&c); |
d62a17ae | 223 | return 0; |
12e41d03 DL |
224 | } |
225 | ||
74389231 DS |
226 | void pim_zebra_update_all_interfaces(struct pim_instance *pim) |
227 | { | |
228 | struct interface *ifp; | |
229 | ||
230 | FOR_ALL_INTERFACES (pim->vrf, ifp) { | |
231 | struct pim_interface *pim_ifp = ifp->info; | |
232 | struct pim_iface_upstream_switch *us; | |
233 | struct listnode *node; | |
234 | ||
235 | if (!pim_ifp) | |
236 | continue; | |
237 | ||
238 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->upstream_switch_list, node, | |
239 | us)) { | |
240 | struct pim_rpf rpf; | |
241 | ||
242 | rpf.source_nexthop.interface = ifp; | |
243 | rpf.rpf_addr.u.prefix4 = us->address; | |
244 | pim_joinprune_send(&rpf, us->us); | |
245 | pim_jp_agg_clear_group(us->us); | |
246 | } | |
247 | } | |
248 | } | |
249 | ||
cc67ccf9 DS |
250 | void pim_zebra_upstream_rpf_changed(struct pim_instance *pim, |
251 | struct pim_upstream *up, | |
252 | struct pim_rpf *old) | |
253 | { | |
1250cb5d SP |
254 | if (old->source_nexthop.interface) { |
255 | struct pim_neighbor *nbr; | |
cc67ccf9 | 256 | |
1250cb5d SP |
257 | nbr = pim_neighbor_find(old->source_nexthop.interface, |
258 | old->rpf_addr.u.prefix4); | |
259 | if (nbr) | |
c5cdf069 | 260 | pim_jp_agg_remove_group(nbr->upstream_jp_agg, up, nbr); |
cc67ccf9 | 261 | |
cc67ccf9 | 262 | /* |
1250cb5d SP |
263 | * We have detected a case where we might need |
264 | * to rescan the inherited o_list so do it. | |
cc67ccf9 | 265 | */ |
1250cb5d SP |
266 | if (up->channel_oil->oil_inherited_rescan) { |
267 | pim_upstream_inherited_olist_decide(pim, up); | |
268 | up->channel_oil->oil_inherited_rescan = 0; | |
269 | } | |
cc67ccf9 | 270 | |
1250cb5d SP |
271 | if (up->join_state == PIM_UPSTREAM_JOINED) { |
272 | /* | |
273 | * If we come up real fast we can be here | |
274 | * where the mroute has not been installed | |
275 | * so install it. | |
276 | */ | |
277 | if (!up->channel_oil->installed) | |
69e3538c | 278 | pim_upstream_mroute_add(up->channel_oil, |
15569c58 | 279 | __func__); |
1250cb5d SP |
280 | |
281 | /* | |
282 | * RFC 4601: 4.5.7. Sending (S,G) | |
283 | * Join/Prune Messages | |
284 | * | |
285 | * Transitions from Joined State | |
286 | * | |
287 | * RPF'(S,G) changes not due to an Assert | |
288 | * | |
289 | * The upstream (S,G) state machine remains | |
290 | * in Joined state. Send Join(S,G) to the new | |
291 | * upstream neighbor, which is the new value | |
292 | * of RPF'(S,G). Send Prune(S,G) to the old | |
293 | * upstream neighbor, which is the old value | |
294 | * of RPF'(S,G). Set the Join Timer (JT) to | |
295 | * expire after t_periodic seconds. | |
296 | */ | |
297 | pim_jp_agg_switch_interface(old, &up->rpf, up); | |
298 | ||
299 | pim_upstream_join_timer_restart(up, old); | |
300 | } /* up->join_state == PIM_UPSTREAM_JOINED */ | |
301 | } | |
302 | ||
303 | else { | |
cc67ccf9 | 304 | /* |
1250cb5d SP |
305 | * We have detected a case where we might need |
306 | * to rescan the inherited o_list so do it. | |
cc67ccf9 | 307 | */ |
1250cb5d SP |
308 | if (up->channel_oil->oil_inherited_rescan) { |
309 | pim_upstream_inherited_olist_decide(pim, up); | |
310 | up->channel_oil->oil_inherited_rescan = 0; | |
311 | } | |
cc67ccf9 | 312 | |
db431af2 AK |
313 | if (up->join_state == PIM_UPSTREAM_JOINED) |
314 | pim_jp_agg_switch_interface(old, &up->rpf, up); | |
315 | ||
1250cb5d | 316 | if (!up->channel_oil->installed) |
15569c58 | 317 | pim_upstream_mroute_add(up->channel_oil, __func__); |
1250cb5d | 318 | } |
cc67ccf9 | 319 | |
1250cb5d SP |
320 | /* FIXME can join_desired actually be changed by pim_rpf_update() |
321 | * returning PIM_RPF_CHANGED ? | |
322 | */ | |
cc67ccf9 DS |
323 | pim_upstream_update_join_desired(pim, up); |
324 | } | |
325 | ||
121f9dee | 326 | static int pim_zebra_vxlan_sg_proc(ZAPI_CALLBACK_ARGS) |
af7b561b AK |
327 | { |
328 | struct stream *s; | |
329 | struct pim_instance *pim; | |
330 | struct prefix_sg sg; | |
331 | ||
332 | pim = pim_get_pim_instance(vrf_id); | |
333 | if (!pim) | |
334 | return 0; | |
335 | ||
336 | s = zclient->ibuf; | |
337 | ||
338 | sg.family = AF_INET; | |
339 | sg.prefixlen = stream_getl(s); | |
340 | stream_get(&sg.src.s_addr, s, sg.prefixlen); | |
341 | stream_get(&sg.grp.s_addr, s, sg.prefixlen); | |
342 | ||
343 | if (PIM_DEBUG_ZEBRA) { | |
344 | char sg_str[PIM_SG_LEN]; | |
345 | ||
346 | pim_str_sg_set(&sg, sg_str); | |
347 | zlog_debug("%u:recv SG %s %s", vrf_id, | |
121f9dee | 348 | (cmd == ZEBRA_VXLAN_SG_ADD)?"add":"del", |
af7b561b AK |
349 | sg_str); |
350 | } | |
351 | ||
121f9dee | 352 | if (cmd == ZEBRA_VXLAN_SG_ADD) |
af7b561b AK |
353 | pim_vxlan_sg_add(pim, &sg); |
354 | else | |
355 | pim_vxlan_sg_del(pim, &sg); | |
356 | ||
357 | return 0; | |
358 | } | |
359 | ||
ecbbc3a7 AK |
360 | static void pim_zebra_vxlan_replay(void) |
361 | { | |
362 | struct stream *s = NULL; | |
363 | ||
364 | /* Check socket. */ | |
365 | if (!zclient || zclient->sock < 0) | |
366 | return; | |
367 | ||
368 | s = zclient->obuf; | |
369 | stream_reset(s); | |
370 | ||
371 | zclient_create_header(s, ZEBRA_VXLAN_SG_REPLAY, VRF_DEFAULT); | |
372 | stream_putw_at(s, 0, stream_get_endp(s)); | |
373 | ||
374 | zclient_send_message(zclient); | |
375 | } | |
376 | ||
da11e325 | 377 | void pim_scan_oil(struct pim_instance *pim) |
8a67a996 | 378 | { |
d62a17ae | 379 | struct channel_oil *c_oil; |
d62a17ae | 380 | |
bfc92019 DS |
381 | pim->scan_oil_last = pim_time_monotonic_sec(); |
382 | ++pim->scan_oil_events; | |
d62a17ae | 383 | |
7315ecda | 384 | frr_each (rb_pim_oil, &pim->channel_oil_head, c_oil) |
7984af18 | 385 | pim_upstream_mroute_iif_update(c_oil, __func__); |
12e41d03 DL |
386 | } |
387 | ||
388 | static int on_rpf_cache_refresh(struct thread *t) | |
389 | { | |
da11e325 DS |
390 | struct pim_instance *pim = THREAD_ARG(t); |
391 | ||
d62a17ae | 392 | /* update kernel multicast forwarding cache (MFC) */ |
da11e325 | 393 | pim_scan_oil(pim); |
12e41d03 | 394 | |
bfc92019 DS |
395 | pim->rpf_cache_refresh_last = pim_time_monotonic_sec(); |
396 | ++pim->rpf_cache_refresh_events; | |
12e41d03 | 397 | |
d62a17ae | 398 | // It is called as part of pim_neighbor_add |
399 | // pim_rp_setup (); | |
400 | return 0; | |
12e41d03 DL |
401 | } |
402 | ||
da11e325 | 403 | void sched_rpf_cache_refresh(struct pim_instance *pim) |
12e41d03 | 404 | { |
bfc92019 | 405 | ++pim->rpf_cache_refresh_requests; |
12e41d03 | 406 | |
bfc92019 | 407 | pim_rpf_set_refresh_time(pim); |
e71bf8f7 | 408 | |
da11e325 | 409 | if (pim->rpf_cache_refresher) { |
d62a17ae | 410 | /* Refresh timer is already running */ |
411 | return; | |
412 | } | |
12e41d03 | 413 | |
d62a17ae | 414 | /* Start refresh timer */ |
12e41d03 | 415 | |
d62a17ae | 416 | if (PIM_DEBUG_ZEBRA) { |
15569c58 | 417 | zlog_debug("%s: triggering %ld msec timer", __func__, |
da03883e | 418 | router->rpf_cache_refresh_delay_msec); |
d62a17ae | 419 | } |
12e41d03 | 420 | |
36417fcc | 421 | thread_add_timer_msec(router->master, on_rpf_cache_refresh, pim, |
da03883e | 422 | router->rpf_cache_refresh_delay_msec, |
da11e325 | 423 | &pim->rpf_cache_refresher); |
12e41d03 DL |
424 | } |
425 | ||
d62a17ae | 426 | static void pim_zebra_connected(struct zclient *zclient) |
48e8451b | 427 | { |
d62a17ae | 428 | /* Send the client registration */ |
0945d5ed | 429 | bfd_client_sendmsg(zclient, ZEBRA_BFD_CLIENT_REGISTER, router->vrf_id); |
ba4eb1bc | 430 | |
4dfe9ad2 | 431 | zclient_send_reg_requests(zclient, router->vrf_id); |
ecbbc3a7 AK |
432 | |
433 | /* request for VxLAN BUM group addresses */ | |
434 | pim_zebra_vxlan_replay(); | |
48e8451b | 435 | } |
8711a53d | 436 | |
ac567a6f DS |
437 | static void pim_zebra_capabilities(struct zclient_capabilities *cap) |
438 | { | |
05ca004b | 439 | router->mlag_role = cap->role; |
ac567a6f DS |
440 | } |
441 | ||
eb05883f | 442 | void pim_zebra_init(void) |
12e41d03 | 443 | { |
d62a17ae | 444 | /* Socket for receiving updates from Zebra daemon */ |
36417fcc | 445 | zclient = zclient_new(router->master, &zclient_options_default); |
d62a17ae | 446 | |
ac567a6f | 447 | zclient->zebra_capabilities = pim_zebra_capabilities; |
d62a17ae | 448 | zclient->zebra_connected = pim_zebra_connected; |
449 | zclient->router_id_update = pim_router_id_update_zebra; | |
d62a17ae | 450 | zclient->interface_address_add = pim_zebra_if_address_add; |
451 | zclient->interface_address_delete = pim_zebra_if_address_del; | |
ee568318 | 452 | zclient->interface_vrf_update = pim_zebra_interface_vrf_update; |
d62a17ae | 453 | zclient->nexthop_update = pim_parse_nexthop_update; |
af7b561b AK |
454 | zclient->vxlan_sg_add = pim_zebra_vxlan_sg_proc; |
455 | zclient->vxlan_sg_del = pim_zebra_vxlan_sg_proc; | |
46c2687c SK |
456 | zclient->mlag_process_up = pim_zebra_mlag_process_up; |
457 | zclient->mlag_process_down = pim_zebra_mlag_process_down; | |
458 | zclient->mlag_handle_msg = pim_zebra_mlag_handle_msg; | |
d62a17ae | 459 | |
342213ea | 460 | zclient_init(zclient, ZEBRA_ROUTE_PIM, 0, &pimd_privs); |
d62a17ae | 461 | if (PIM_DEBUG_PIM_TRACE) { |
15569c58 | 462 | zlog_notice("%s: zclient socket initialized", __func__); |
d62a17ae | 463 | } |
464 | ||
465 | zclient_lookup_new(); | |
12e41d03 DL |
466 | } |
467 | ||
6f932b0c DS |
468 | void igmp_anysource_forward_start(struct pim_instance *pim, |
469 | struct igmp_group *group) | |
12e41d03 | 470 | { |
d62a17ae | 471 | struct igmp_source *source; |
472 | struct in_addr src_addr = {.s_addr = 0}; | |
473 | /* Any source (*,G) is forwarded only if mode is EXCLUDE {empty} */ | |
474 | zassert(group->group_filtermode_isexcl); | |
475 | zassert(listcount(group->group_source_list) < 1); | |
476 | ||
477 | source = source_new(group, src_addr); | |
478 | if (!source) { | |
15569c58 | 479 | zlog_warn("%s: Failure to create * source", __func__); |
d62a17ae | 480 | return; |
481 | } | |
482 | ||
6f932b0c | 483 | igmp_source_forward_start(pim, source); |
12e41d03 DL |
484 | } |
485 | ||
486 | void igmp_anysource_forward_stop(struct igmp_group *group) | |
487 | { | |
d62a17ae | 488 | struct igmp_source *source; |
489 | struct in_addr star = {.s_addr = 0}; | |
12e41d03 | 490 | |
d62a17ae | 491 | source = igmp_find_source_by_addr(group, star); |
492 | if (source) | |
493 | igmp_source_forward_stop(source); | |
12e41d03 DL |
494 | } |
495 | ||
6f439a70 DS |
496 | static void igmp_source_forward_reevaluate_one(struct pim_instance *pim, |
497 | struct igmp_source *source) | |
15a5dafe | 498 | { |
d62a17ae | 499 | struct prefix_sg sg; |
500 | struct igmp_group *group = source->source_group; | |
501 | struct pim_ifchannel *ch; | |
502 | ||
503 | if ((source->source_addr.s_addr != INADDR_ANY) | |
504 | || !IGMP_SOURCE_TEST_FORWARDING(source->source_flags)) | |
505 | return; | |
506 | ||
507 | memset(&sg, 0, sizeof(struct prefix_sg)); | |
508 | sg.src = source->source_addr; | |
509 | sg.grp = group->group_addr; | |
510 | ||
511 | ch = pim_ifchannel_find(group->group_igmp_sock->interface, &sg); | |
6f439a70 | 512 | if (pim_is_grp_ssm(pim, group->group_addr)) { |
d62a17ae | 513 | /* If SSM group withdraw local membership */ |
514 | if (ch | |
515 | && (ch->local_ifmembership == PIM_IFMEMBERSHIP_INCLUDE)) { | |
516 | if (PIM_DEBUG_PIM_EVENTS) | |
517 | zlog_debug( | |
518 | "local membership del for %s as G is now SSM", | |
519 | pim_str_sg_dump(&sg)); | |
520 | pim_ifchannel_local_membership_del( | |
521 | group->group_igmp_sock->interface, &sg); | |
522 | } | |
523 | } else { | |
524 | /* If ASM group add local membership */ | |
525 | if (!ch | |
526 | || (ch->local_ifmembership == PIM_IFMEMBERSHIP_NOINFO)) { | |
527 | if (PIM_DEBUG_PIM_EVENTS) | |
528 | zlog_debug( | |
529 | "local membership add for %s as G is now ASM", | |
530 | pim_str_sg_dump(&sg)); | |
531 | pim_ifchannel_local_membership_add( | |
448139e7 AK |
532 | group->group_igmp_sock->interface, &sg, |
533 | false /*is_vxlan*/); | |
d62a17ae | 534 | } |
535 | } | |
15a5dafe | 536 | } |
537 | ||
5d59e408 | 538 | void igmp_source_forward_reevaluate_all(struct pim_instance *pim) |
15a5dafe | 539 | { |
d62a17ae | 540 | struct interface *ifp; |
541 | ||
5d59e408 DS |
542 | FOR_ALL_INTERFACES (pim->vrf, ifp) { |
543 | struct pim_interface *pim_ifp = ifp->info; | |
544 | struct listnode *sock_node; | |
545 | struct igmp_sock *igmp; | |
546 | ||
547 | if (!pim_ifp) | |
d62a17ae | 548 | continue; |
549 | ||
5d59e408 DS |
550 | /* scan igmp sockets */ |
551 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->igmp_socket_list, sock_node, | |
552 | igmp)) { | |
553 | struct listnode *grpnode; | |
554 | struct igmp_group *grp; | |
555 | ||
556 | /* scan igmp groups */ | |
557 | for (ALL_LIST_ELEMENTS_RO(igmp->igmp_group_list, | |
558 | grpnode, grp)) { | |
559 | struct listnode *srcnode; | |
560 | struct igmp_source *src; | |
561 | ||
562 | /* scan group sources */ | |
563 | for (ALL_LIST_ELEMENTS_RO( | |
564 | grp->group_source_list, srcnode, | |
565 | src)) { | |
566 | igmp_source_forward_reevaluate_one(pim, | |
567 | src); | |
568 | } /* scan group sources */ | |
569 | } /* scan igmp groups */ | |
570 | } /* scan igmp sockets */ | |
571 | } /* scan interfaces */ | |
15a5dafe | 572 | } |
573 | ||
6f932b0c DS |
574 | void igmp_source_forward_start(struct pim_instance *pim, |
575 | struct igmp_source *source) | |
12e41d03 | 576 | { |
75c61a18 | 577 | struct pim_interface *pim_oif; |
d62a17ae | 578 | struct igmp_group *group; |
579 | struct prefix_sg sg; | |
580 | int result; | |
581 | int input_iface_vif_index = 0; | |
582 | ||
583 | memset(&sg, 0, sizeof(struct prefix_sg)); | |
584 | sg.src = source->source_addr; | |
585 | sg.grp = source->source_group->group_addr; | |
586 | ||
587 | if (PIM_DEBUG_IGMP_TRACE) { | |
588 | zlog_debug( | |
15569c58 DA |
589 | "%s: (S,G)=%s igmp_sock=%d oif=%s fwd=%d", __func__, |
590 | pim_str_sg_dump(&sg), | |
d62a17ae | 591 | source->source_group->group_igmp_sock->fd, |
592 | source->source_group->group_igmp_sock->interface->name, | |
593 | IGMP_SOURCE_TEST_FORWARDING(source->source_flags)); | |
594 | } | |
595 | ||
596 | /* Prevent IGMP interface from installing multicast route multiple | |
597 | times */ | |
598 | if (IGMP_SOURCE_TEST_FORWARDING(source->source_flags)) { | |
599 | return; | |
8711a53d | 600 | } |
d62a17ae | 601 | |
602 | group = source->source_group; | |
75c61a18 DS |
603 | pim_oif = group->group_igmp_sock->interface->info; |
604 | if (!pim_oif) { | |
605 | if (PIM_DEBUG_IGMP_TRACE) { | |
15569c58 DA |
606 | zlog_debug("%s: multicast not enabled on oif=%s ?", |
607 | __func__, | |
75c61a18 | 608 | source->source_group->group_igmp_sock |
15569c58 | 609 | ->interface->name); |
75c61a18 DS |
610 | } |
611 | return; | |
612 | } | |
d62a17ae | 613 | |
614 | if (!source->source_channel_oil) { | |
615 | struct in_addr vif_source; | |
d1a1b09c | 616 | struct prefix src, grp; |
d62a17ae | 617 | struct pim_nexthop nexthop; |
618 | struct pim_upstream *up = NULL; | |
619 | ||
6f932b0c | 620 | if (!pim_rp_set_upstream_addr(pim, &vif_source, |
732c209c SP |
621 | source->source_addr, sg.grp)) { |
622 | /*Create a dummy channel oil */ | |
15569c58 DA |
623 | source->source_channel_oil = |
624 | pim_channel_oil_add(pim, &sg, __func__); | |
732c209c | 625 | } |
d62a17ae | 626 | |
732c209c | 627 | else { |
732c209c SP |
628 | src.family = AF_INET; |
629 | src.prefixlen = IPV4_MAX_BITLEN; | |
630 | src.u.prefix4 = vif_source; // RP or Src address | |
631 | grp.family = AF_INET; | |
632 | grp.prefixlen = IPV4_MAX_BITLEN; | |
633 | grp.u.prefix4 = sg.grp; | |
634 | ||
43763b11 DS |
635 | up = pim_upstream_find(pim, &sg); |
636 | if (up) { | |
637 | memcpy(&nexthop, &up->rpf.source_nexthop, | |
638 | sizeof(struct pim_nexthop)); | |
639 | pim_ecmp_nexthop_lookup(pim, &nexthop, &src, | |
640 | &grp, 0); | |
641 | if (nexthop.interface) | |
642 | input_iface_vif_index = | |
d62a17ae | 643 | pim_if_find_vifindex_by_ifindex( |
43763b11 DS |
644 | pim, |
645 | nexthop.interface->ifindex); | |
732c209c SP |
646 | } else |
647 | input_iface_vif_index = | |
43763b11 DS |
648 | pim_ecmp_fib_lookup_if_vif_index( |
649 | pim, &src, &grp); | |
d62a17ae | 650 | |
732c209c SP |
651 | if (PIM_DEBUG_ZEBRA) { |
652 | char buf2[INET_ADDRSTRLEN]; | |
d62a17ae | 653 | |
732c209c SP |
654 | pim_inet4_dump("<source?>", vif_source, buf2, |
655 | sizeof(buf2)); | |
15569c58 DA |
656 | zlog_debug( |
657 | "%s: NHT %s vif_source %s vif_index:%d ", | |
658 | __func__, pim_str_sg_dump(&sg), buf2, | |
659 | input_iface_vif_index); | |
d62a17ae | 660 | } |
d62a17ae | 661 | |
732c209c SP |
662 | if (input_iface_vif_index < 1) { |
663 | if (PIM_DEBUG_IGMP_TRACE) { | |
664 | char source_str[INET_ADDRSTRLEN]; | |
665 | pim_inet4_dump("<source?>", | |
666 | source->source_addr, | |
667 | source_str, sizeof(source_str)); | |
668 | zlog_debug( | |
15569c58 DA |
669 | "%s %s: could not find input interface for source %s", |
670 | __FILE__, __func__, source_str); | |
732c209c SP |
671 | } |
672 | source->source_channel_oil = | |
15569c58 | 673 | pim_channel_oil_add(pim, &sg, __func__); |
732c209c SP |
674 | } |
675 | ||
676 | else { | |
677 | /* | |
678 | * Protect IGMP against adding looped MFC | |
679 | * entries created by both source and receiver | |
680 | * attached to the same interface. See TODO | |
50d06d9e | 681 | * T22. Block only when the intf is non DR |
682 | * DR must create upstream. | |
732c209c | 683 | */ |
50d06d9e | 684 | if ((input_iface_vif_index == |
685 | pim_oif->mroute_vif_index) && | |
686 | !(PIM_I_am_DR(pim_oif))) { | |
732c209c SP |
687 | /* ignore request for looped MFC entry |
688 | */ | |
689 | if (PIM_DEBUG_IGMP_TRACE) { | |
690 | zlog_debug( | |
15569c58 DA |
691 | "%s: ignoring request for looped MFC entry (S,G)=%s: igmp_sock=%d oif=%s vif_index=%d", |
692 | __func__, | |
693 | pim_str_sg_dump(&sg), | |
694 | source->source_group | |
695 | ->group_igmp_sock | |
696 | ->fd, | |
697 | source->source_group | |
698 | ->group_igmp_sock | |
699 | ->interface->name, | |
700 | input_iface_vif_index); | |
732c209c SP |
701 | } |
702 | return; | |
703 | } | |
704 | ||
705 | source->source_channel_oil = | |
15569c58 | 706 | pim_channel_oil_add(pim, &sg, __func__); |
732c209c SP |
707 | if (!source->source_channel_oil) { |
708 | if (PIM_DEBUG_IGMP_TRACE) { | |
709 | zlog_debug( | |
15569c58 DA |
710 | "%s %s: could not create OIL for channel (S,G)=%s", |
711 | __FILE__, __func__, | |
712 | pim_str_sg_dump(&sg)); | |
732c209c SP |
713 | } |
714 | return; | |
715 | } | |
d62a17ae | 716 | } |
d62a17ae | 717 | } |
8711a53d | 718 | } |
d62a17ae | 719 | |
ac6ebcb0 | 720 | if (PIM_I_am_DR(pim_oif) || PIM_I_am_DualActive(pim_oif)) { |
8e389ea9 DS |
721 | result = pim_channel_add_oif(source->source_channel_oil, |
722 | group->group_igmp_sock->interface, | |
1b249e70 | 723 | PIM_OIF_FLAG_PROTO_IGMP, __func__); |
8e389ea9 DS |
724 | if (result) { |
725 | if (PIM_DEBUG_MROUTE) { | |
726 | zlog_warn("%s: add_oif() failed with return=%d", | |
727 | __func__, result); | |
728 | } | |
729 | return; | |
d62a17ae | 730 | } |
8e389ea9 | 731 | } else { |
90a084e4 | 732 | if (PIM_DEBUG_IGMP_TRACE) |
15569c58 DA |
733 | zlog_debug( |
734 | "%s: %s was received on %s interface but we are not DR for that interface", | |
735 | __func__, pim_str_sg_dump(&sg), | |
736 | group->group_igmp_sock->interface->name); | |
b96892db | 737 | |
75c61a18 | 738 | return; |
90a084e4 | 739 | } |
d62a17ae | 740 | /* |
741 | Feed IGMPv3-gathered local membership information into PIM | |
742 | per-interface (S,G) state. | |
743 | */ | |
744 | if (!pim_ifchannel_local_membership_add( | |
448139e7 AK |
745 | group->group_igmp_sock->interface, &sg, |
746 | false /*is_vxlan*/)) { | |
d62a17ae | 747 | if (PIM_DEBUG_MROUTE) |
748 | zlog_warn("%s: Failure to add local membership for %s", | |
15569c58 | 749 | __func__, pim_str_sg_dump(&sg)); |
b96892db DS |
750 | |
751 | pim_channel_del_oif(source->source_channel_oil, | |
752 | group->group_igmp_sock->interface, | |
1b249e70 | 753 | PIM_OIF_FLAG_PROTO_IGMP, __func__); |
d62a17ae | 754 | return; |
755 | } | |
756 | ||
757 | IGMP_SOURCE_DO_FORWARDING(source->source_flags); | |
12e41d03 DL |
758 | } |
759 | ||
760 | /* | |
761 | igmp_source_forward_stop: stop fowarding, but keep the source | |
762 | igmp_source_delete: stop fowarding, and delete the source | |
763 | */ | |
764 | void igmp_source_forward_stop(struct igmp_source *source) | |
765 | { | |
d62a17ae | 766 | struct igmp_group *group; |
767 | struct prefix_sg sg; | |
768 | int result; | |
769 | ||
770 | memset(&sg, 0, sizeof(struct prefix_sg)); | |
771 | sg.src = source->source_addr; | |
772 | sg.grp = source->source_group->group_addr; | |
773 | ||
774 | if (PIM_DEBUG_IGMP_TRACE) { | |
775 | zlog_debug( | |
15569c58 DA |
776 | "%s: (S,G)=%s igmp_sock=%d oif=%s fwd=%d", __func__, |
777 | pim_str_sg_dump(&sg), | |
d62a17ae | 778 | source->source_group->group_igmp_sock->fd, |
779 | source->source_group->group_igmp_sock->interface->name, | |
780 | IGMP_SOURCE_TEST_FORWARDING(source->source_flags)); | |
781 | } | |
782 | ||
783 | /* Prevent IGMP interface from removing multicast route multiple | |
784 | times */ | |
785 | if (!IGMP_SOURCE_TEST_FORWARDING(source->source_flags)) { | |
786 | return; | |
787 | } | |
788 | ||
789 | group = source->source_group; | |
790 | ||
791 | /* | |
792 | It appears that in certain circumstances that | |
793 | igmp_source_forward_stop is called when IGMP forwarding | |
794 | was not enabled in oif_flags for this outgoing interface. | |
795 | Possibly because of multiple calls. When that happens, we | |
796 | enter the below if statement and this function returns early | |
797 | which in turn triggers the calling function to assert. | |
798 | Making the call to pim_channel_del_oif and ignoring the return code | |
799 | fixes the issue without ill effect, similar to | |
800 | pim_forward_stop below. | |
801 | */ | |
802 | result = pim_channel_del_oif(source->source_channel_oil, | |
803 | group->group_igmp_sock->interface, | |
1b249e70 AK |
804 | PIM_OIF_FLAG_PROTO_IGMP, |
805 | __func__); | |
d62a17ae | 806 | if (result) { |
807 | if (PIM_DEBUG_IGMP_TRACE) | |
808 | zlog_debug( | |
809 | "%s: pim_channel_del_oif() failed with return=%d", | |
810 | __func__, result); | |
811 | return; | |
812 | } | |
813 | ||
814 | /* | |
815 | Feed IGMPv3-gathered local membership information into PIM | |
816 | per-interface (S,G) state. | |
817 | */ | |
818 | pim_ifchannel_local_membership_del(group->group_igmp_sock->interface, | |
819 | &sg); | |
820 | ||
821 | IGMP_SOURCE_DONT_FORWARDING(source->source_flags); | |
12e41d03 DL |
822 | } |
823 | ||
824 | void pim_forward_start(struct pim_ifchannel *ch) | |
825 | { | |
d62a17ae | 826 | struct pim_upstream *up = ch->upstream; |
9443810e | 827 | uint32_t mask = 0; |
d62a17ae | 828 | |
829 | if (PIM_DEBUG_PIM_TRACE) { | |
830 | char source_str[INET_ADDRSTRLEN]; | |
831 | char group_str[INET_ADDRSTRLEN]; | |
832 | char upstream_str[INET_ADDRSTRLEN]; | |
833 | ||
834 | pim_inet4_dump("<source?>", ch->sg.src, source_str, | |
835 | sizeof(source_str)); | |
836 | pim_inet4_dump("<group?>", ch->sg.grp, group_str, | |
837 | sizeof(group_str)); | |
838 | pim_inet4_dump("<upstream?>", up->upstream_addr, upstream_str, | |
839 | sizeof(upstream_str)); | |
15569c58 | 840 | zlog_debug("%s: (S,G)=(%s,%s) oif=%s (%s)", __func__, |
d62a17ae | 841 | source_str, group_str, ch->interface->name, |
732c209c | 842 | inet_ntoa(up->upstream_addr)); |
d62a17ae | 843 | } |
844 | ||
9443810e | 845 | if (PIM_IF_FLAG_TEST_PROTO_IGMP(ch->flags)) |
d62a17ae | 846 | mask = PIM_OIF_FLAG_PROTO_IGMP; |
847 | ||
9443810e SP |
848 | if (PIM_IF_FLAG_TEST_PROTO_PIM(ch->flags)) |
849 | mask |= PIM_OIF_FLAG_PROTO_PIM; | |
850 | ||
1b249e70 AK |
851 | pim_channel_add_oif(up->channel_oil, ch->interface, |
852 | mask, __func__); | |
12e41d03 DL |
853 | } |
854 | ||
aabb9a2f | 855 | void pim_forward_stop(struct pim_ifchannel *ch, bool install_it) |
12e41d03 | 856 | { |
d62a17ae | 857 | struct pim_upstream *up = ch->upstream; |
12e41d03 | 858 | |
d62a17ae | 859 | if (PIM_DEBUG_PIM_TRACE) { |
aabb9a2f | 860 | zlog_debug("%s: (S,G)=%s oif=%s install_it: %d installed: %d", |
15569c58 | 861 | __func__, ch->sg_str, ch->interface->name, |
aabb9a2f | 862 | install_it, up->channel_oil->installed); |
d62a17ae | 863 | } |
12e41d03 | 864 | |
2164ed5d DS |
865 | /* |
866 | * If a channel is being removed, check to see if we still need | |
867 | * to inherit the interface. If so make sure it is added in | |
868 | */ | |
869 | if (pim_upstream_evaluate_join_desired_interface(up, ch, ch->parent)) | |
870 | pim_channel_add_oif(up->channel_oil, ch->interface, | |
1b249e70 | 871 | PIM_OIF_FLAG_PROTO_PIM, __func__); |
2164ed5d DS |
872 | else |
873 | pim_channel_del_oif(up->channel_oil, ch->interface, | |
1b249e70 | 874 | PIM_OIF_FLAG_PROTO_PIM, __func__); |
aabb9a2f DS |
875 | |
876 | if (install_it && !up->channel_oil->installed) | |
15569c58 | 877 | pim_upstream_mroute_add(up->channel_oil, __func__); |
12e41d03 | 878 | } |
8799b66b | 879 | |
d62a17ae | 880 | void pim_zebra_zclient_update(struct vty *vty) |
8799b66b | 881 | { |
d62a17ae | 882 | vty_out(vty, "Zclient update socket: "); |
883 | ||
884 | if (zclient) { | |
885 | vty_out(vty, "%d failures=%d\n", zclient->sock, zclient->fail); | |
886 | } else { | |
887 | vty_out(vty, "<null zclient>\n"); | |
888 | } | |
8799b66b | 889 | } |
1bc98276 | 890 | |
d62a17ae | 891 | struct zclient *pim_zebra_zclient_get(void) |
1bc98276 | 892 | { |
d62a17ae | 893 | if (zclient) |
894 | return zclient; | |
895 | else | |
896 | return NULL; | |
1bc98276 | 897 | } |
ddbf3e60 DS |
898 | |
899 | void pim_zebra_interface_set_master(struct interface *vrf, | |
900 | struct interface *ifp) | |
901 | { | |
902 | zclient_interface_set_master(zclient, vrf, ifp); | |
903 | } |