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12e41d03 DL |
1 | /* |
2 | PIM for Quagga | |
3 | Copyright (C) 2008 Everton da Silva Marques | |
4 | ||
5 | This program is free software; you can redistribute it and/or modify | |
6 | it under the terms of the GNU General Public License as published by | |
7 | the Free Software Foundation; either version 2 of the License, or | |
8 | (at your option) any later version. | |
9 | ||
10 | This program is distributed in the hope that it will be useful, but | |
11 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU General Public License | |
16 | along with this program; see the file COPYING; if not, write to the | |
17 | Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, | |
18 | MA 02110-1301 USA | |
19 | ||
12e41d03 DL |
20 | */ |
21 | ||
22 | #include <zebra.h> | |
23 | ||
24 | #include "zebra/rib.h" | |
25 | ||
26 | #include "if.h" | |
27 | #include "log.h" | |
28 | #include "prefix.h" | |
29 | #include "zclient.h" | |
30 | #include "stream.h" | |
31 | #include "network.h" | |
dfe43e25 DW |
32 | #include "vty.h" |
33 | #include "plist.h" | |
12e41d03 DL |
34 | |
35 | #include "pimd.h" | |
36 | #include "pim_pim.h" | |
37 | #include "pim_zebra.h" | |
38 | #include "pim_iface.h" | |
39 | #include "pim_str.h" | |
40 | #include "pim_oil.h" | |
41 | #include "pim_rpf.h" | |
42 | #include "pim_time.h" | |
43 | #include "pim_join.h" | |
44 | #include "pim_zlookup.h" | |
45 | #include "pim_ifchannel.h" | |
8f5f5e91 | 46 | #include "pim_rp.h" |
2560106c | 47 | #include "pim_igmpv3.h" |
12e41d03 DL |
48 | |
49 | #undef PIM_DEBUG_IFADDR_DUMP | |
50 | #define PIM_DEBUG_IFADDR_DUMP | |
51 | ||
52 | static int fib_lookup_if_vif_index(struct in_addr addr); | |
53 | static int del_oif(struct channel_oil *channel_oil, | |
54 | struct interface *oif, | |
55 | uint32_t proto_mask); | |
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 DL |
60 | { |
61 | struct prefix router_id; | |
62 | ||
63 | zebra_router_id_update_read(zclient->ibuf, &router_id); | |
64 | ||
65 | return 0; | |
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 DL |
70 | { |
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 | */ | |
469351b3 | 77 | ifp = zebra_interface_add_read(zclient->ibuf, vrf_id); |
12e41d03 DL |
78 | if (!ifp) |
79 | return 0; | |
80 | ||
81 | if (PIM_DEBUG_ZEBRA) { | |
82 | zlog_debug("%s: %s index %d flags %ld metric %d mtu %d operative %d", | |
83 | __PRETTY_FUNCTION__, | |
84 | ifp->name, ifp->ifindex, (long)ifp->flags, ifp->metric, | |
85 | ifp->mtu, if_is_operative(ifp)); | |
86 | } | |
87 | ||
88 | if (if_is_operative(ifp)) | |
89 | pim_if_addr_add_all(ifp); | |
90 | ||
91 | return 0; | |
92 | } | |
93 | ||
94 | static int pim_zebra_if_del(int command, struct zclient *zclient, | |
469351b3 | 95 | zebra_size_t length, vrf_id_t vrf_id) |
12e41d03 DL |
96 | { |
97 | struct interface *ifp; | |
98 | ||
99 | /* | |
100 | zebra api adds/dels interfaces using the same call | |
101 | interface_add_read below, see comments in lib/zclient.c | |
102 | ||
103 | comments in lib/zclient.c seem to indicate that calling | |
104 | zebra_interface_add_read is the correct call, but that | |
105 | results in an attemted out of bounds read which causes | |
106 | pimd to assert. Other clients use zebra_interface_state_read | |
107 | and it appears to work just fine. | |
108 | */ | |
469351b3 | 109 | ifp = zebra_interface_state_read(zclient->ibuf, vrf_id); |
12e41d03 DL |
110 | if (!ifp) |
111 | return 0; | |
112 | ||
113 | if (PIM_DEBUG_ZEBRA) { | |
114 | zlog_debug("%s: %s index %d flags %ld metric %d mtu %d operative %d", | |
115 | __PRETTY_FUNCTION__, | |
116 | ifp->name, ifp->ifindex, (long)ifp->flags, ifp->metric, | |
117 | ifp->mtu, if_is_operative(ifp)); | |
118 | } | |
119 | ||
120 | if (!if_is_operative(ifp)) | |
121 | pim_if_addr_del_all(ifp); | |
122 | ||
123 | return 0; | |
124 | } | |
125 | ||
126 | static int pim_zebra_if_state_up(int command, struct zclient *zclient, | |
469351b3 | 127 | zebra_size_t length, vrf_id_t vrf_id) |
12e41d03 DL |
128 | { |
129 | struct interface *ifp; | |
130 | ||
131 | /* | |
132 | zebra api notifies interface up/down events by using the same call | |
133 | zebra_interface_state_read below, see comments in lib/zclient.c | |
134 | */ | |
469351b3 | 135 | ifp = zebra_interface_state_read(zclient->ibuf, vrf_id); |
12e41d03 DL |
136 | if (!ifp) |
137 | return 0; | |
138 | ||
12e41d03 DL |
139 | if (PIM_DEBUG_ZEBRA) { |
140 | zlog_debug("%s: %s index %d flags %ld metric %d mtu %d operative %d", | |
141 | __PRETTY_FUNCTION__, | |
142 | ifp->name, ifp->ifindex, (long)ifp->flags, ifp->metric, | |
143 | ifp->mtu, if_is_operative(ifp)); | |
144 | } | |
145 | ||
146 | if (if_is_operative(ifp)) { | |
147 | /* | |
148 | pim_if_addr_add_all() suffices for bringing up both IGMP and PIM | |
149 | */ | |
150 | pim_if_addr_add_all(ifp); | |
151 | } | |
152 | ||
153 | return 0; | |
154 | } | |
155 | ||
156 | static int pim_zebra_if_state_down(int command, struct zclient *zclient, | |
469351b3 | 157 | zebra_size_t length, vrf_id_t vrf_id) |
12e41d03 DL |
158 | { |
159 | struct interface *ifp; | |
160 | ||
161 | /* | |
162 | zebra api notifies interface up/down events by using the same call | |
163 | zebra_interface_state_read below, see comments in lib/zclient.c | |
164 | */ | |
469351b3 | 165 | ifp = zebra_interface_state_read(zclient->ibuf, vrf_id); |
12e41d03 DL |
166 | if (!ifp) |
167 | return 0; | |
168 | ||
12e41d03 DL |
169 | if (PIM_DEBUG_ZEBRA) { |
170 | zlog_debug("%s: %s index %d flags %ld metric %d mtu %d operative %d", | |
171 | __PRETTY_FUNCTION__, | |
172 | ifp->name, ifp->ifindex, (long)ifp->flags, ifp->metric, | |
173 | ifp->mtu, if_is_operative(ifp)); | |
174 | } | |
175 | ||
176 | if (!if_is_operative(ifp)) { | |
177 | /* | |
178 | pim_if_addr_del_all() suffices for shutting down IGMP, | |
179 | but not for shutting down PIM | |
180 | */ | |
181 | pim_if_addr_del_all(ifp); | |
182 | ||
183 | /* | |
184 | pim_sock_delete() closes the socket, stops read and timer threads, | |
185 | and kills all neighbors. | |
186 | */ | |
187 | if (ifp->info) { | |
188 | pim_sock_delete(ifp, "link down"); | |
189 | } | |
190 | } | |
191 | ||
192 | return 0; | |
193 | } | |
194 | ||
195 | #ifdef PIM_DEBUG_IFADDR_DUMP | |
196 | static void dump_if_address(struct interface *ifp) | |
197 | { | |
198 | struct connected *ifc; | |
199 | struct listnode *node; | |
200 | ||
201 | zlog_debug("%s %s: interface %s addresses:", | |
202 | __FILE__, __PRETTY_FUNCTION__, | |
203 | ifp->name); | |
204 | ||
205 | for (ALL_LIST_ELEMENTS_RO(ifp->connected, node, ifc)) { | |
206 | struct prefix *p = ifc->address; | |
207 | ||
208 | if (p->family != AF_INET) | |
209 | continue; | |
210 | ||
211 | zlog_debug("%s %s: interface %s address %s %s", | |
212 | __FILE__, __PRETTY_FUNCTION__, | |
213 | ifp->name, | |
214 | inet_ntoa(p->u.prefix4), | |
215 | CHECK_FLAG(ifc->flags, ZEBRA_IFA_SECONDARY) ? | |
216 | "secondary" : "primary"); | |
217 | } | |
218 | } | |
219 | #endif | |
220 | ||
221 | static int pim_zebra_if_address_add(int command, struct zclient *zclient, | |
469351b3 | 222 | zebra_size_t length, vrf_id_t vrf_id) |
12e41d03 DL |
223 | { |
224 | struct connected *c; | |
225 | struct prefix *p; | |
7176984f | 226 | struct pim_interface *pim_ifp; |
12e41d03 | 227 | |
12e41d03 DL |
228 | /* |
229 | zebra api notifies address adds/dels events by using the same call | |
230 | interface_add_read below, see comments in lib/zclient.c | |
231 | ||
232 | zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_ADD, ...) | |
233 | will add address to interface list by calling | |
234 | connected_add_by_prefix() | |
235 | */ | |
469351b3 | 236 | c = zebra_interface_address_read(command, zclient->ibuf, vrf_id); |
12e41d03 DL |
237 | if (!c) |
238 | return 0; | |
239 | ||
7176984f | 240 | pim_ifp = c->ifp->info; |
12e41d03 | 241 | p = c->address; |
d8424057 | 242 | |
12e41d03 DL |
243 | if (PIM_DEBUG_ZEBRA) { |
244 | char buf[BUFSIZ]; | |
245 | prefix2str(p, buf, BUFSIZ); | |
246 | zlog_debug("%s: %s connected IP address %s flags %u %s", | |
247 | __PRETTY_FUNCTION__, | |
248 | c->ifp->name, buf, c->flags, | |
249 | CHECK_FLAG(c->flags, ZEBRA_IFA_SECONDARY) ? "secondary" : "primary"); | |
250 | ||
251 | #ifdef PIM_DEBUG_IFADDR_DUMP | |
252 | dump_if_address(c->ifp); | |
253 | #endif | |
254 | } | |
255 | ||
d8424057 DS |
256 | if (p->family != AF_INET) |
257 | { | |
d8424057 DS |
258 | struct listnode *cnode; |
259 | struct connected *conn; | |
260 | int v4addrs = 0; | |
261 | ||
262 | for (ALL_LIST_ELEMENTS_RO (c->ifp->connected, cnode, conn)) | |
263 | { | |
264 | if (conn->address->family == AF_INET) | |
265 | v4addrs++; | |
266 | } | |
267 | if (!v4addrs && pim_ifp) | |
268 | { | |
d8424057 DS |
269 | pim_ifp->primary_address = pim_find_primary_addr (c->ifp); |
270 | pim_if_addr_add_all (c->ifp); | |
80219b76 | 271 | pim_if_add_vif (c->ifp); |
d8424057 DS |
272 | } |
273 | return 0; | |
274 | } | |
275 | ||
12e41d03 DL |
276 | if (!CHECK_FLAG(c->flags, ZEBRA_IFA_SECONDARY)) { |
277 | /* trying to add primary address */ | |
278 | ||
279 | struct in_addr primary_addr = pim_find_primary_addr(c->ifp); | |
280 | if (primary_addr.s_addr != p->u.prefix4.s_addr) { | |
c5cb17ec DS |
281 | if (PIM_DEBUG_ZEBRA) { |
282 | /* but we had a primary address already */ | |
12e41d03 | 283 | |
c5cb17ec | 284 | char buf[BUFSIZ]; |
12e41d03 | 285 | |
c5cb17ec | 286 | prefix2str(p, buf, BUFSIZ); |
12e41d03 | 287 | |
7176984f | 288 | zlog_warn("%s: %s : forcing secondary flag on %s", |
c5cb17ec | 289 | __PRETTY_FUNCTION__, |
7176984f | 290 | c->ifp->name, buf); |
c5cb17ec | 291 | } |
12e41d03 DL |
292 | SET_FLAG(c->flags, ZEBRA_IFA_SECONDARY); |
293 | } | |
294 | } | |
295 | ||
296 | pim_if_addr_add(c); | |
7176984f | 297 | if (pim_ifp) |
298 | pim_rp_check_on_if_add(pim_ifp); | |
12e41d03 | 299 | |
d8424057 DS |
300 | if (if_is_loopback (c->ifp)) |
301 | { | |
302 | struct listnode *ifnode; | |
303 | struct interface *ifp; | |
304 | ||
305 | for (ALL_LIST_ELEMENTS_RO (vrf_iflist (VRF_DEFAULT), ifnode, ifp)) | |
306 | { | |
307 | if (!if_is_loopback (ifp) && if_is_operative (ifp)) | |
308 | pim_if_addr_add_all (ifp); | |
309 | } | |
310 | } | |
311 | ||
12e41d03 DL |
312 | return 0; |
313 | } | |
314 | ||
315 | static int pim_zebra_if_address_del(int command, struct zclient *client, | |
469351b3 | 316 | zebra_size_t length, vrf_id_t vrf_id) |
12e41d03 DL |
317 | { |
318 | struct connected *c; | |
319 | struct prefix *p; | |
320 | ||
12e41d03 DL |
321 | /* |
322 | zebra api notifies address adds/dels events by using the same call | |
323 | interface_add_read below, see comments in lib/zclient.c | |
324 | ||
325 | zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_DELETE, ...) | |
326 | will remove address from interface list by calling | |
327 | connected_delete_by_prefix() | |
328 | */ | |
469351b3 | 329 | c = zebra_interface_address_read(command, client->ibuf, vrf_id); |
12e41d03 DL |
330 | if (!c) |
331 | return 0; | |
332 | ||
333 | p = c->address; | |
334 | if (p->family != AF_INET) | |
335 | return 0; | |
336 | ||
337 | if (PIM_DEBUG_ZEBRA) { | |
338 | char buf[BUFSIZ]; | |
339 | prefix2str(p, buf, BUFSIZ); | |
340 | zlog_debug("%s: %s disconnected IP address %s flags %u %s", | |
341 | __PRETTY_FUNCTION__, | |
342 | c->ifp->name, buf, c->flags, | |
343 | CHECK_FLAG(c->flags, ZEBRA_IFA_SECONDARY) ? "secondary" : "primary"); | |
344 | ||
345 | #ifdef PIM_DEBUG_IFADDR_DUMP | |
346 | dump_if_address(c->ifp); | |
347 | #endif | |
348 | } | |
349 | ||
350 | pim_if_addr_del(c, 0); | |
7176984f | 351 | pim_i_am_rp_re_evaluate(); |
12e41d03 DL |
352 | |
353 | return 0; | |
354 | } | |
355 | ||
356 | static void scan_upstream_rpf_cache() | |
357 | { | |
358 | struct listnode *up_node; | |
359 | struct listnode *up_nextnode; | |
360 | struct pim_upstream *up; | |
361 | ||
0f588989 | 362 | for (ALL_LIST_ELEMENTS(pim_upstream_list, up_node, up_nextnode, up)) { |
12e41d03 | 363 | struct in_addr old_rpf_addr; |
7747bad6 | 364 | struct interface *old_interface; |
12e41d03 DL |
365 | enum pim_rpf_result rpf_result; |
366 | ||
7747bad6 | 367 | old_interface = up->rpf.source_nexthop.interface; |
f24405b1 | 368 | rpf_result = pim_rpf_update(up, &old_rpf_addr); |
12e41d03 DL |
369 | if (rpf_result == PIM_RPF_FAILURE) |
370 | continue; | |
371 | ||
372 | if (rpf_result == PIM_RPF_CHANGED) { | |
373 | ||
374 | if (up->join_state == PIM_UPSTREAM_JOINED) { | |
34fe48e7 DS |
375 | /* |
376 | * If we come up real fast we can be here | |
377 | * where the mroute has not been installed | |
378 | * so install it. | |
379 | */ | |
3f07087b | 380 | if (up->channel_oil && !up->channel_oil->installed) |
34fe48e7 DS |
381 | pim_mroute_add (up->channel_oil); |
382 | ||
12e41d03 DL |
383 | /* |
384 | RFC 4601: 4.5.7. Sending (S,G) Join/Prune Messages | |
385 | ||
386 | Transitions from Joined State | |
387 | ||
388 | RPF'(S,G) changes not due to an Assert | |
389 | ||
390 | The upstream (S,G) state machine remains in Joined | |
391 | state. Send Join(S,G) to the new upstream neighbor, which is | |
392 | the new value of RPF'(S,G). Send Prune(S,G) to the old | |
393 | upstream neighbor, which is the old value of RPF'(S,G). Set | |
394 | the Join Timer (JT) to expire after t_periodic seconds. | |
395 | */ | |
396 | ||
397 | ||
398 | /* send Prune(S,G) to the old upstream neighbor */ | |
7747bad6 | 399 | pim_joinprune_send(old_interface, old_rpf_addr, |
372eab92 | 400 | up, 0 /* prune */); |
12e41d03 DL |
401 | |
402 | /* send Join(S,G) to the current upstream neighbor */ | |
403 | pim_joinprune_send(up->rpf.source_nexthop.interface, | |
63c59d0c | 404 | up->rpf.rpf_addr.u.prefix4, |
372eab92 | 405 | up, |
12e41d03 DL |
406 | 1 /* join */); |
407 | ||
408 | pim_upstream_join_timer_restart(up); | |
409 | } /* up->join_state == PIM_UPSTREAM_JOINED */ | |
410 | ||
411 | /* FIXME can join_desired actually be changed by pim_rpf_update() | |
412 | returning PIM_RPF_CHANGED ? */ | |
413 | pim_upstream_update_join_desired(up); | |
414 | ||
415 | } /* PIM_RPF_CHANGED */ | |
416 | ||
417 | } /* for (qpim_upstream_list) */ | |
418 | ||
419 | } | |
420 | ||
8a67a996 DS |
421 | void |
422 | pim_scan_individual_oil (struct channel_oil *c_oil) | |
12e41d03 | 423 | { |
60cd0356 DS |
424 | struct in_addr vif_source; |
425 | int input_iface_vif_index; | |
8a67a996 | 426 | int old_vif_index; |
12e41d03 | 427 | |
36d6bd7d | 428 | if (!pim_rp_set_upstream_addr (&vif_source, c_oil->oil.mfcc_origin, c_oil->oil.mfcc_mcastgrp)) |
60cd0356 DS |
429 | return; |
430 | ||
431 | input_iface_vif_index = fib_lookup_if_vif_index (vif_source); | |
8a67a996 DS |
432 | if (input_iface_vif_index < 1) |
433 | { | |
60cd0356 DS |
434 | if (PIM_DEBUG_ZEBRA) |
435 | { | |
eaa54bdb DW |
436 | char source_str[INET_ADDRSTRLEN]; |
437 | char group_str[INET_ADDRSTRLEN]; | |
60cd0356 DS |
438 | pim_inet4_dump("<source?>", c_oil->oil.mfcc_origin, source_str, sizeof(source_str)); |
439 | pim_inet4_dump("<group?>", c_oil->oil.mfcc_mcastgrp, group_str, sizeof(group_str)); | |
440 | zlog_debug("%s %s: could not find input interface(%d) for (S,G)=(%s,%s)", | |
441 | __FILE__, __PRETTY_FUNCTION__, c_oil->oil.mfcc_parent, | |
442 | source_str, group_str); | |
443 | } | |
444 | pim_mroute_del (c_oil); | |
8a67a996 | 445 | return; |
12e41d03 DL |
446 | } |
447 | ||
8a67a996 DS |
448 | if (input_iface_vif_index == c_oil->oil.mfcc_parent) |
449 | { | |
b1d15e15 DS |
450 | if (!c_oil->installed) |
451 | pim_mroute_add (c_oil); | |
452 | ||
12e41d03 | 453 | /* RPF unchanged */ |
8a67a996 | 454 | return; |
12e41d03 DL |
455 | } |
456 | ||
8a67a996 DS |
457 | if (PIM_DEBUG_ZEBRA) |
458 | { | |
12e41d03 DL |
459 | struct interface *old_iif = pim_if_find_by_vif_index(c_oil->oil.mfcc_parent); |
460 | struct interface *new_iif = pim_if_find_by_vif_index(input_iface_vif_index); | |
eaa54bdb DW |
461 | char source_str[INET_ADDRSTRLEN]; |
462 | char group_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
463 | pim_inet4_dump("<source?>", c_oil->oil.mfcc_origin, source_str, sizeof(source_str)); |
464 | pim_inet4_dump("<group?>", c_oil->oil.mfcc_mcastgrp, group_str, sizeof(group_str)); | |
465 | zlog_debug("%s %s: (S,G)=(%s,%s) input interface changed from %s vif_index=%d to %s vif_index=%d", | |
466 | __FILE__, __PRETTY_FUNCTION__, | |
467 | source_str, group_str, | |
469c6aa2 DS |
468 | old_iif->name, c_oil->oil.mfcc_parent, |
469 | new_iif->name, input_iface_vif_index); | |
12e41d03 DL |
470 | } |
471 | ||
8a67a996 DS |
472 | /* new iif loops to existing oif ? */ |
473 | if (c_oil->oil.mfcc_ttls[input_iface_vif_index]) | |
474 | { | |
12e41d03 DL |
475 | struct interface *new_iif = pim_if_find_by_vif_index(input_iface_vif_index); |
476 | ||
477 | if (PIM_DEBUG_ZEBRA) { | |
eaa54bdb DW |
478 | char source_str[INET_ADDRSTRLEN]; |
479 | char group_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
480 | pim_inet4_dump("<source?>", c_oil->oil.mfcc_origin, source_str, sizeof(source_str)); |
481 | pim_inet4_dump("<group?>", c_oil->oil.mfcc_mcastgrp, group_str, sizeof(group_str)); | |
482 | zlog_debug("%s %s: (S,G)=(%s,%s) new iif loops to existing oif: %s vif_index=%d", | |
483 | __FILE__, __PRETTY_FUNCTION__, | |
484 | source_str, group_str, | |
469c6aa2 | 485 | new_iif->name, input_iface_vif_index); |
12e41d03 DL |
486 | } |
487 | ||
488 | del_oif(c_oil, new_iif, PIM_OIF_FLAG_PROTO_ANY); | |
489 | } | |
490 | ||
491 | /* update iif vif_index */ | |
492 | old_vif_index = c_oil->oil.mfcc_parent; | |
493 | c_oil->oil.mfcc_parent = input_iface_vif_index; | |
494 | ||
495 | /* update kernel multicast forwarding cache (MFC) */ | |
c171d6d8 | 496 | if (pim_mroute_add(c_oil)) |
8a67a996 | 497 | { |
8711a53d DS |
498 | if (PIM_DEBUG_MROUTE) |
499 | { | |
500 | /* just log warning */ | |
501 | struct interface *old_iif = pim_if_find_by_vif_index(old_vif_index); | |
502 | struct interface *new_iif = pim_if_find_by_vif_index(input_iface_vif_index); | |
503 | char source_str[INET_ADDRSTRLEN]; | |
504 | char group_str[INET_ADDRSTRLEN]; | |
505 | pim_inet4_dump("<source?>", c_oil->oil.mfcc_origin, source_str, sizeof(source_str)); | |
506 | pim_inet4_dump("<group?>", c_oil->oil.mfcc_mcastgrp, group_str, sizeof(group_str)); | |
507 | zlog_debug("%s %s: (S,G)=(%s,%s) failure updating input interface from %s vif_index=%d to %s vif_index=%d", | |
508 | __FILE__, __PRETTY_FUNCTION__, | |
509 | source_str, group_str, | |
510 | old_iif ? old_iif->name : "<old_iif?>", c_oil->oil.mfcc_parent, | |
511 | new_iif ? new_iif->name : "<new_iif?>", input_iface_vif_index); | |
512 | } | |
12e41d03 | 513 | } |
8a67a996 DS |
514 | } |
515 | ||
516 | void pim_scan_oil() | |
517 | { | |
518 | struct listnode *node; | |
519 | struct listnode *nextnode; | |
520 | struct channel_oil *c_oil; | |
521 | ||
522 | qpim_scan_oil_last = pim_time_monotonic_sec(); | |
523 | ++qpim_scan_oil_events; | |
12e41d03 | 524 | |
040d86ad | 525 | for (ALL_LIST_ELEMENTS(pim_channel_oil_list, node, nextnode, c_oil)) |
8a67a996 | 526 | pim_scan_individual_oil (c_oil); |
12e41d03 DL |
527 | } |
528 | ||
529 | static int on_rpf_cache_refresh(struct thread *t) | |
530 | { | |
12e41d03 DL |
531 | zassert(qpim_rpf_cache_refresher); |
532 | ||
533 | qpim_rpf_cache_refresher = 0; | |
534 | ||
535 | /* update PIM protocol state */ | |
536 | scan_upstream_rpf_cache(); | |
537 | ||
538 | /* update kernel multicast forwarding cache (MFC) */ | |
539 | pim_scan_oil(); | |
540 | ||
541 | qpim_rpf_cache_refresh_last = pim_time_monotonic_sec(); | |
542 | ++qpim_rpf_cache_refresh_events; | |
543 | ||
00d07c6f | 544 | pim_rp_setup (); |
12e41d03 DL |
545 | return 0; |
546 | } | |
547 | ||
da72c9fd | 548 | void sched_rpf_cache_refresh(void) |
12e41d03 DL |
549 | { |
550 | ++qpim_rpf_cache_refresh_requests; | |
551 | ||
e71bf8f7 DS |
552 | pim_rpf_set_refresh_time (); |
553 | ||
12e41d03 DL |
554 | if (qpim_rpf_cache_refresher) { |
555 | /* Refresh timer is already running */ | |
556 | return; | |
557 | } | |
558 | ||
559 | /* Start refresh timer */ | |
560 | ||
561 | if (PIM_DEBUG_ZEBRA) { | |
562 | zlog_debug("%s: triggering %ld msec timer", | |
563 | __PRETTY_FUNCTION__, | |
564 | qpim_rpf_cache_refresh_delay_msec); | |
565 | } | |
566 | ||
567 | THREAD_TIMER_MSEC_ON(master, qpim_rpf_cache_refresher, | |
568 | on_rpf_cache_refresh, | |
569 | 0, qpim_rpf_cache_refresh_delay_msec); | |
570 | } | |
571 | ||
572 | static int redist_read_ipv4_route(int command, struct zclient *zclient, | |
469351b3 | 573 | zebra_size_t length, vrf_id_t vrf_id) |
12e41d03 DL |
574 | { |
575 | struct stream *s; | |
576 | struct zapi_ipv4 api; | |
b892f1dd | 577 | ifindex_t ifindex; |
12e41d03 DL |
578 | struct in_addr nexthop; |
579 | struct prefix_ipv4 p; | |
580 | int min_len = 4; | |
581 | ||
582 | if (length < min_len) { | |
583 | zlog_warn("%s %s: short buffer: length=%d min=%d", | |
584 | __FILE__, __PRETTY_FUNCTION__, | |
585 | length, min_len); | |
586 | return -1; | |
587 | } | |
588 | ||
589 | s = zclient->ibuf; | |
590 | ifindex = 0; | |
591 | nexthop.s_addr = 0; | |
592 | ||
593 | /* Type, flags, message. */ | |
594 | api.type = stream_getc(s); | |
5d3c5e6d | 595 | api.instance = stream_getw (s); |
0fc452dc | 596 | api.flags = stream_getl(s); |
12e41d03 DL |
597 | api.message = stream_getc(s); |
598 | ||
599 | /* IPv4 prefix length. */ | |
600 | memset(&p, 0, sizeof(struct prefix_ipv4)); | |
601 | p.family = AF_INET; | |
602 | p.prefixlen = stream_getc(s); | |
603 | ||
604 | min_len += | |
605 | PSIZE(p.prefixlen) + | |
606 | CHECK_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP) ? 5 : 0 + | |
607 | CHECK_FLAG(api.message, ZAPI_MESSAGE_IFINDEX) ? 5 : 0 + | |
608 | CHECK_FLAG(api.message, ZAPI_MESSAGE_DISTANCE) ? 1 : 0 + | |
609 | CHECK_FLAG(api.message, ZAPI_MESSAGE_METRIC) ? 4 : 0; | |
610 | ||
611 | if (PIM_DEBUG_ZEBRA) { | |
612 | zlog_debug("%s %s: length=%d min_len=%d flags=%s%s%s%s", | |
613 | __FILE__, __PRETTY_FUNCTION__, | |
614 | length, min_len, | |
615 | CHECK_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP) ? "nh" : "", | |
616 | CHECK_FLAG(api.message, ZAPI_MESSAGE_IFINDEX) ? " ifi" : "", | |
617 | CHECK_FLAG(api.message, ZAPI_MESSAGE_DISTANCE) ? " dist" : "", | |
618 | CHECK_FLAG(api.message, ZAPI_MESSAGE_METRIC) ? " metr" : ""); | |
619 | } | |
620 | ||
12e41d03 DL |
621 | /* IPv4 prefix. */ |
622 | stream_get(&p.prefix, s, PSIZE(p.prefixlen)); | |
623 | ||
624 | /* Nexthop, ifindex, distance, metric. */ | |
625 | if (CHECK_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP)) { | |
626 | api.nexthop_num = stream_getc(s); | |
627 | nexthop.s_addr = stream_get_ipv4(s); | |
628 | } | |
629 | if (CHECK_FLAG(api.message, ZAPI_MESSAGE_IFINDEX)) { | |
630 | api.ifindex_num = stream_getc(s); | |
631 | ifindex = stream_getl(s); | |
632 | } | |
633 | ||
634 | api.distance = CHECK_FLAG(api.message, ZAPI_MESSAGE_DISTANCE) ? | |
635 | stream_getc(s) : | |
636 | 0; | |
637 | ||
638 | api.metric = CHECK_FLAG(api.message, ZAPI_MESSAGE_METRIC) ? | |
639 | stream_getl(s) : | |
640 | 0; | |
641 | ||
5d3c5e6d | 642 | if (CHECK_FLAG (api.message, ZAPI_MESSAGE_TAG)) |
dc9ffce8 | 643 | api.tag = stream_getl (s); |
5d3c5e6d DS |
644 | else |
645 | api.tag = 0; | |
646 | ||
12e41d03 | 647 | switch (command) { |
5d3c5e6d | 648 | case ZEBRA_REDISTRIBUTE_IPV4_ADD: |
12e41d03 DL |
649 | if (PIM_DEBUG_ZEBRA) { |
650 | char buf[2][INET_ADDRSTRLEN]; | |
651 | zlog_debug("%s: add %s %s/%d " | |
b892f1dd | 652 | "nexthop %s ifindex %d metric%s %u distance%s %u", |
12e41d03 DL |
653 | __PRETTY_FUNCTION__, |
654 | zebra_route_string(api.type), | |
655 | inet_ntop(AF_INET, &p.prefix, buf[0], sizeof(buf[0])), | |
656 | p.prefixlen, | |
657 | inet_ntop(AF_INET, &nexthop, buf[1], sizeof(buf[1])), | |
658 | ifindex, | |
659 | CHECK_FLAG(api.message, ZAPI_MESSAGE_METRIC) ? "-recv" : "-miss", | |
660 | api.metric, | |
661 | CHECK_FLAG(api.message, ZAPI_MESSAGE_DISTANCE) ? "-recv" : "-miss", | |
662 | api.distance); | |
663 | } | |
664 | break; | |
5d3c5e6d | 665 | case ZEBRA_REDISTRIBUTE_IPV4_DEL: |
12e41d03 DL |
666 | if (PIM_DEBUG_ZEBRA) { |
667 | char buf[2][INET_ADDRSTRLEN]; | |
668 | zlog_debug("%s: delete %s %s/%d " | |
b892f1dd | 669 | "nexthop %s ifindex %d metric%s %u distance%s %u", |
12e41d03 DL |
670 | __PRETTY_FUNCTION__, |
671 | zebra_route_string(api.type), | |
672 | inet_ntop(AF_INET, &p.prefix, buf[0], sizeof(buf[0])), | |
673 | p.prefixlen, | |
674 | inet_ntop(AF_INET, &nexthop, buf[1], sizeof(buf[1])), | |
675 | ifindex, | |
676 | CHECK_FLAG(api.message, ZAPI_MESSAGE_METRIC) ? "-recv" : "-miss", | |
677 | api.metric, | |
678 | CHECK_FLAG(api.message, ZAPI_MESSAGE_DISTANCE) ? "-recv" : "-miss", | |
679 | api.distance); | |
680 | } | |
681 | break; | |
682 | default: | |
683 | zlog_warn("%s: unknown command=%d", __PRETTY_FUNCTION__, command); | |
684 | return -1; | |
685 | } | |
686 | ||
687 | sched_rpf_cache_refresh(); | |
688 | ||
00d07c6f | 689 | pim_rp_setup (); |
12e41d03 DL |
690 | return 0; |
691 | } | |
692 | ||
48e8451b DS |
693 | static void |
694 | pim_zebra_connected (struct zclient *zclient) | |
695 | { | |
696 | zclient_send_reg_requests (zclient, VRF_DEFAULT); | |
697 | } | |
8711a53d | 698 | |
12e41d03 DL |
699 | void pim_zebra_init(char *zebra_sock_path) |
700 | { | |
701 | int i; | |
702 | ||
703 | if (zebra_sock_path) | |
704 | zclient_serv_path_set(zebra_sock_path); | |
705 | ||
706 | #ifdef HAVE_TCP_ZEBRA | |
707 | zlog_notice("zclient update contacting ZEBRA daemon at socket TCP %s,%d", "127.0.0.1", ZEBRA_PORT); | |
708 | #else | |
709 | zlog_notice("zclient update contacting ZEBRA daemon at socket UNIX %s", zclient_serv_path_get()); | |
710 | #endif | |
711 | ||
712 | /* Socket for receiving updates from Zebra daemon */ | |
469351b3 | 713 | qpim_zclient_update = zclient_new (master); |
12e41d03 | 714 | |
48e8451b | 715 | qpim_zclient_update->zebra_connected = pim_zebra_connected; |
12e41d03 DL |
716 | qpim_zclient_update->router_id_update = pim_router_id_update_zebra; |
717 | qpim_zclient_update->interface_add = pim_zebra_if_add; | |
718 | qpim_zclient_update->interface_delete = pim_zebra_if_del; | |
719 | qpim_zclient_update->interface_up = pim_zebra_if_state_up; | |
720 | qpim_zclient_update->interface_down = pim_zebra_if_state_down; | |
721 | qpim_zclient_update->interface_address_add = pim_zebra_if_address_add; | |
722 | qpim_zclient_update->interface_address_delete = pim_zebra_if_address_del; | |
5d3c5e6d DS |
723 | qpim_zclient_update->redistribute_route_ipv4_add = redist_read_ipv4_route; |
724 | qpim_zclient_update->redistribute_route_ipv4_del = redist_read_ipv4_route; | |
12e41d03 | 725 | |
469351b3 | 726 | zclient_init(qpim_zclient_update, ZEBRA_ROUTE_PIM, 0); |
12e41d03 DL |
727 | if (PIM_DEBUG_PIM_TRACE) { |
728 | zlog_info("zclient_init cleared redistribution request"); | |
729 | } | |
730 | ||
731 | zassert(qpim_zclient_update->redist_default == ZEBRA_ROUTE_PIM); | |
732 | ||
733 | /* Request all redistribution */ | |
734 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) { | |
735 | if (i == qpim_zclient_update->redist_default) | |
736 | continue; | |
469351b3 | 737 | vrf_bitmap_set (qpim_zclient_update->redist[AFI_IP][i], VRF_DEFAULT);; |
12e41d03 DL |
738 | if (PIM_DEBUG_PIM_TRACE) { |
739 | zlog_debug("%s: requesting redistribution for %s (%i)", | |
740 | __PRETTY_FUNCTION__, zebra_route_string(i), i); | |
741 | } | |
742 | } | |
743 | ||
744 | /* Request default information */ | |
745 | zclient_redistribute_default (ZEBRA_REDISTRIBUTE_DEFAULT_ADD, | |
746 | qpim_zclient_update, VRF_DEFAULT); | |
747 | ||
748 | if (PIM_DEBUG_PIM_TRACE) { | |
749 | zlog_info("%s: requesting default information redistribution", | |
750 | __PRETTY_FUNCTION__); | |
751 | ||
752 | zlog_notice("%s: zclient update socket initialized", | |
753 | __PRETTY_FUNCTION__); | |
754 | } | |
755 | ||
05b0d0d0 | 756 | zclient_lookup_new(); |
12e41d03 DL |
757 | } |
758 | ||
759 | void igmp_anysource_forward_start(struct igmp_group *group) | |
760 | { | |
cab8707e DS |
761 | struct igmp_source *source; |
762 | struct in_addr src_addr = { .s_addr = 0 }; | |
12e41d03 DL |
763 | /* Any source (*,G) is forwarded only if mode is EXCLUDE {empty} */ |
764 | zassert(group->group_filtermode_isexcl); | |
765 | zassert(listcount(group->group_source_list) < 1); | |
766 | ||
cab8707e DS |
767 | source = source_new (group, src_addr); |
768 | if (!source) | |
769 | { | |
770 | zlog_warn ("%s: Failure to create * source", __PRETTY_FUNCTION__); | |
771 | return; | |
772 | } | |
773 | ||
774 | igmp_source_forward_start (source); | |
12e41d03 DL |
775 | } |
776 | ||
777 | void igmp_anysource_forward_stop(struct igmp_group *group) | |
778 | { | |
2560106c DS |
779 | struct igmp_source *source; |
780 | struct in_addr star = { .s_addr = 0 }; | |
12e41d03 | 781 | |
2560106c DS |
782 | source = igmp_find_source_by_addr (group, star); |
783 | if (source) | |
784 | igmp_source_forward_stop (source); | |
12e41d03 DL |
785 | } |
786 | ||
787 | static int fib_lookup_if_vif_index(struct in_addr addr) | |
788 | { | |
7b2c4d16 | 789 | struct pim_zlookup_nexthop nexthop_tab[MULTIPATH_NUM]; |
12e41d03 DL |
790 | int num_ifindex; |
791 | int vif_index; | |
b892f1dd | 792 | ifindex_t first_ifindex; |
12e41d03 | 793 | |
05b0d0d0 | 794 | num_ifindex = zclient_lookup_nexthop(nexthop_tab, |
7b2c4d16 | 795 | MULTIPATH_NUM, addr, |
12e41d03 DL |
796 | PIM_NEXTHOP_LOOKUP_MAX); |
797 | if (num_ifindex < 1) { | |
8711a53d DS |
798 | if (PIM_DEBUG_ZEBRA) |
799 | { | |
800 | char addr_str[INET_ADDRSTRLEN]; | |
801 | pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str)); | |
802 | zlog_debug("%s %s: could not find nexthop ifindex for address %s", | |
803 | __FILE__, __PRETTY_FUNCTION__, | |
804 | addr_str); | |
805 | } | |
12e41d03 DL |
806 | return -1; |
807 | } | |
808 | ||
809 | first_ifindex = nexthop_tab[0].ifindex; | |
810 | ||
811 | if (num_ifindex > 1) { | |
8711a53d DS |
812 | if (PIM_DEBUG_ZEBRA) |
813 | { | |
814 | char addr_str[INET_ADDRSTRLEN]; | |
815 | pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str)); | |
816 | zlog_debug("%s %s: FIXME ignoring multiple nexthop ifindex'es num_ifindex=%d for address %s (using only ifindex=%d)", | |
817 | __FILE__, __PRETTY_FUNCTION__, | |
818 | num_ifindex, addr_str, first_ifindex); | |
819 | } | |
12e41d03 DL |
820 | /* debug warning only, do not return */ |
821 | } | |
822 | ||
823 | if (PIM_DEBUG_ZEBRA) { | |
eaa54bdb | 824 | char addr_str[INET_ADDRSTRLEN]; |
12e41d03 DL |
825 | pim_inet4_dump("<ifaddr?>", addr, addr_str, sizeof(addr_str)); |
826 | zlog_debug("%s %s: found nexthop ifindex=%d (interface %s) for address %s", | |
827 | __FILE__, __PRETTY_FUNCTION__, | |
828 | first_ifindex, ifindex2ifname(first_ifindex), addr_str); | |
829 | } | |
830 | ||
831 | vif_index = pim_if_find_vifindex_by_ifindex(first_ifindex); | |
832 | ||
ae90dfbb | 833 | if (vif_index < 0) { |
8711a53d DS |
834 | if (PIM_DEBUG_ZEBRA) |
835 | { | |
836 | char addr_str[INET_ADDRSTRLEN]; | |
837 | pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str)); | |
838 | zlog_debug("%s %s: low vif_index=%d < 1 nexthop for address %s", | |
839 | __FILE__, __PRETTY_FUNCTION__, | |
840 | vif_index, addr_str); | |
841 | } | |
12e41d03 DL |
842 | return -2; |
843 | } | |
844 | ||
12e41d03 DL |
845 | return vif_index; |
846 | } | |
847 | ||
12e41d03 DL |
848 | static int del_oif(struct channel_oil *channel_oil, |
849 | struct interface *oif, | |
850 | uint32_t proto_mask) | |
851 | { | |
852 | struct pim_interface *pim_ifp; | |
853 | int old_ttl; | |
854 | ||
12e41d03 DL |
855 | pim_ifp = oif->info; |
856 | ||
12e41d03 | 857 | if (PIM_DEBUG_MROUTE) { |
eaa54bdb DW |
858 | char group_str[INET_ADDRSTRLEN]; |
859 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
860 | pim_inet4_dump("<group?>", channel_oil->oil.mfcc_mcastgrp, group_str, sizeof(group_str)); |
861 | pim_inet4_dump("<source?>", channel_oil->oil.mfcc_origin, source_str, sizeof(source_str)); | |
862 | zlog_debug("%s %s: (S,G)=(%s,%s): proto_mask=%u OIF=%s vif_index=%d", | |
863 | __FILE__, __PRETTY_FUNCTION__, | |
864 | source_str, group_str, | |
865 | proto_mask, oif->name, pim_ifp->mroute_vif_index); | |
866 | } | |
867 | ||
868 | /* Prevent single protocol from unsubscribing same interface from | |
869 | channel (S,G) multiple times */ | |
870 | if (!(channel_oil->oif_flags[pim_ifp->mroute_vif_index] & proto_mask)) { | |
05ca4827 DS |
871 | if (PIM_DEBUG_MROUTE) |
872 | { | |
eaa54bdb DW |
873 | char group_str[INET_ADDRSTRLEN]; |
874 | char source_str[INET_ADDRSTRLEN]; | |
05ca4827 DS |
875 | pim_inet4_dump("<group?>", channel_oil->oil.mfcc_mcastgrp, group_str, sizeof(group_str)); |
876 | pim_inet4_dump("<source?>", channel_oil->oil.mfcc_origin, source_str, sizeof(source_str)); | |
8711a53d DS |
877 | zlog_debug("%s %s: nonexistent protocol mask %u removed OIF %s (vif_index=%d, min_ttl=%d) from channel (S,G)=(%s,%s)", |
878 | __FILE__, __PRETTY_FUNCTION__, | |
879 | proto_mask, oif->name, pim_ifp->mroute_vif_index, | |
880 | channel_oil->oil.mfcc_ttls[pim_ifp->mroute_vif_index], | |
881 | source_str, group_str); | |
05ca4827 | 882 | } |
12e41d03 DL |
883 | return -2; |
884 | } | |
885 | ||
886 | /* Mark that protocol is no longer interested in this OIF */ | |
887 | channel_oil->oif_flags[pim_ifp->mroute_vif_index] &= ~proto_mask; | |
888 | ||
889 | /* Allow multiple protocols to unsubscribe same interface from | |
890 | channel (S,G) multiple times, by silently ignoring requests while | |
891 | there is at least one protocol interested in the channel */ | |
892 | if (channel_oil->oif_flags[pim_ifp->mroute_vif_index] & PIM_OIF_FLAG_PROTO_ANY) { | |
893 | ||
894 | /* Check the OIF keeps existing before returning, and only log | |
895 | warning otherwise */ | |
896 | if (channel_oil->oil.mfcc_ttls[pim_ifp->mroute_vif_index] < 1) { | |
8711a53d DS |
897 | if (PIM_DEBUG_MROUTE) |
898 | { | |
899 | char group_str[INET_ADDRSTRLEN]; | |
900 | char source_str[INET_ADDRSTRLEN]; | |
901 | pim_inet4_dump("<group?>", channel_oil->oil.mfcc_mcastgrp, group_str, sizeof(group_str)); | |
902 | pim_inet4_dump("<source?>", channel_oil->oil.mfcc_origin, source_str, sizeof(source_str)); | |
903 | zlog_debug("%s %s: protocol mask %u removing nonexistent OIF %s (vif_index=%d, min_ttl=%d) from channel (S,G)=(%s,%s)", | |
904 | __FILE__, __PRETTY_FUNCTION__, | |
905 | proto_mask, oif->name, pim_ifp->mroute_vif_index, | |
906 | channel_oil->oil.mfcc_ttls[pim_ifp->mroute_vif_index], | |
907 | source_str, group_str); | |
908 | } | |
12e41d03 DL |
909 | } |
910 | ||
911 | return 0; | |
912 | } | |
913 | ||
914 | old_ttl = channel_oil->oil.mfcc_ttls[pim_ifp->mroute_vif_index]; | |
915 | ||
916 | if (old_ttl < 1) { | |
8711a53d DS |
917 | if (PIM_DEBUG_MROUTE) |
918 | { | |
919 | char group_str[INET_ADDRSTRLEN]; | |
920 | char source_str[INET_ADDRSTRLEN]; | |
921 | pim_inet4_dump("<group?>", channel_oil->oil.mfcc_mcastgrp, group_str, sizeof(group_str)); | |
922 | pim_inet4_dump("<source?>", channel_oil->oil.mfcc_origin, source_str, sizeof(source_str)); | |
923 | zlog_debug("%s %s: interface %s (vif_index=%d) is not output for channel (S,G)=(%s,%s)", | |
924 | __FILE__, __PRETTY_FUNCTION__, | |
925 | oif->name, pim_ifp->mroute_vif_index, | |
926 | source_str, group_str); | |
927 | } | |
12e41d03 DL |
928 | return -3; |
929 | } | |
930 | ||
931 | channel_oil->oil.mfcc_ttls[pim_ifp->mroute_vif_index] = 0; | |
932 | ||
c171d6d8 | 933 | if (pim_mroute_add(channel_oil)) { |
8711a53d | 934 | char group_str[INET_ADDRSTRLEN]; |
eaa54bdb | 935 | char source_str[INET_ADDRSTRLEN]; |
12e41d03 DL |
936 | pim_inet4_dump("<group?>", channel_oil->oil.mfcc_mcastgrp, group_str, sizeof(group_str)); |
937 | pim_inet4_dump("<source?>", channel_oil->oil.mfcc_origin, source_str, sizeof(source_str)); | |
938 | zlog_warn("%s %s: could not remove output interface %s (vif_index=%d) from channel (S,G)=(%s,%s)", | |
939 | __FILE__, __PRETTY_FUNCTION__, | |
940 | oif->name, pim_ifp->mroute_vif_index, | |
941 | source_str, group_str); | |
942 | ||
943 | channel_oil->oil.mfcc_ttls[pim_ifp->mroute_vif_index] = old_ttl; | |
944 | return -4; | |
945 | } | |
946 | ||
947 | --channel_oil->oil_size; | |
948 | ||
949 | if (channel_oil->oil_size < 1) { | |
c171d6d8 | 950 | if (pim_mroute_del(channel_oil)) { |
8711a53d DS |
951 | if (PIM_DEBUG_MROUTE) |
952 | { | |
953 | /* just log a warning in case of failure */ | |
954 | char group_str[INET_ADDRSTRLEN]; | |
955 | char source_str[INET_ADDRSTRLEN]; | |
956 | pim_inet4_dump("<group?>", channel_oil->oil.mfcc_mcastgrp, group_str, sizeof(group_str)); | |
957 | pim_inet4_dump("<source?>", channel_oil->oil.mfcc_origin, source_str, sizeof(source_str)); | |
958 | zlog_debug("%s %s: failure removing OIL for channel (S,G)=(%s,%s)", | |
959 | __FILE__, __PRETTY_FUNCTION__, | |
960 | source_str, group_str); | |
961 | } | |
12e41d03 DL |
962 | } |
963 | } | |
964 | ||
965 | if (PIM_DEBUG_MROUTE) { | |
eaa54bdb DW |
966 | char group_str[INET_ADDRSTRLEN]; |
967 | char source_str[INET_ADDRSTRLEN]; | |
12e41d03 DL |
968 | pim_inet4_dump("<group?>", channel_oil->oil.mfcc_mcastgrp, group_str, sizeof(group_str)); |
969 | pim_inet4_dump("<source?>", channel_oil->oil.mfcc_origin, source_str, sizeof(source_str)); | |
970 | zlog_debug("%s %s: (S,G)=(%s,%s): proto_mask=%u OIF=%s vif_index=%d: DONE", | |
971 | __FILE__, __PRETTY_FUNCTION__, | |
972 | source_str, group_str, | |
973 | proto_mask, oif->name, pim_ifp->mroute_vif_index); | |
974 | } | |
975 | ||
976 | return 0; | |
977 | } | |
978 | ||
979 | void igmp_source_forward_start(struct igmp_source *source) | |
980 | { | |
981 | struct igmp_group *group; | |
4ed0af70 | 982 | struct prefix_sg sg; |
12e41d03 DL |
983 | int result; |
984 | ||
02e6923e | 985 | memset (&sg, 0, sizeof (struct prefix_sg)); |
4ed0af70 DS |
986 | sg.src = source->source_addr; |
987 | sg.grp = source->source_group->group_addr; | |
05e451f8 | 988 | |
12e41d03 | 989 | if (PIM_DEBUG_IGMP_TRACE) { |
05e451f8 | 990 | zlog_debug("%s: (S,G)=%s igmp_sock=%d oif=%s fwd=%d", |
12e41d03 | 991 | __PRETTY_FUNCTION__, |
05e451f8 | 992 | pim_str_sg_dump (&sg), |
12e41d03 DL |
993 | source->source_group->group_igmp_sock->fd, |
994 | source->source_group->group_igmp_sock->interface->name, | |
995 | IGMP_SOURCE_TEST_FORWARDING(source->source_flags)); | |
996 | } | |
997 | ||
998 | /* Prevent IGMP interface from installing multicast route multiple | |
999 | times */ | |
1000 | if (IGMP_SOURCE_TEST_FORWARDING(source->source_flags)) { | |
1001 | return; | |
1002 | } | |
1003 | ||
1004 | group = source->source_group; | |
1005 | ||
1006 | if (!source->source_channel_oil) { | |
8f5f5e91 | 1007 | struct in_addr vif_source; |
12e41d03 | 1008 | struct pim_interface *pim_oif; |
8f5f5e91 | 1009 | |
36d6bd7d | 1010 | if (!pim_rp_set_upstream_addr (&vif_source, source->source_addr, sg.grp)) |
8f5f5e91 DS |
1011 | return; |
1012 | ||
1013 | int input_iface_vif_index = fib_lookup_if_vif_index(vif_source); | |
12e41d03 | 1014 | if (input_iface_vif_index < 1) { |
8711a53d DS |
1015 | if (PIM_DEBUG_IGMP_TRACE) |
1016 | { | |
1017 | char source_str[INET_ADDRSTRLEN]; | |
1018 | pim_inet4_dump("<source?>", source->source_addr, source_str, sizeof(source_str)); | |
1019 | zlog_debug("%s %s: could not find input interface for source %s", | |
1020 | __FILE__, __PRETTY_FUNCTION__, | |
1021 | source_str); | |
1022 | } | |
12e41d03 DL |
1023 | return; |
1024 | } | |
1025 | ||
1026 | /* | |
1027 | Protect IGMP against adding looped MFC entries created by both | |
1028 | source and receiver attached to the same interface. See TODO | |
1029 | T22. | |
1030 | */ | |
1031 | pim_oif = source->source_group->group_igmp_sock->interface->info; | |
1032 | if (!pim_oif) { | |
8711a53d DS |
1033 | if (PIM_DEBUG_IGMP_TRACE) |
1034 | { | |
1035 | zlog_debug("%s: multicast not enabled on oif=%s ?", | |
1036 | __PRETTY_FUNCTION__, | |
1037 | source->source_group->group_igmp_sock->interface->name); | |
1038 | } | |
12e41d03 DL |
1039 | return; |
1040 | } | |
8711a53d | 1041 | |
12e41d03 DL |
1042 | if (input_iface_vif_index == pim_oif->mroute_vif_index) { |
1043 | /* ignore request for looped MFC entry */ | |
1044 | if (PIM_DEBUG_IGMP_TRACE) { | |
05e451f8 | 1045 | zlog_debug("%s: ignoring request for looped MFC entry (S,G)=%s: igmp_sock=%d oif=%s vif_index=%d", |
12e41d03 | 1046 | __PRETTY_FUNCTION__, |
05e451f8 | 1047 | pim_str_sg_dump (&sg), |
12e41d03 DL |
1048 | source->source_group->group_igmp_sock->fd, |
1049 | source->source_group->group_igmp_sock->interface->name, | |
1050 | input_iface_vif_index); | |
1051 | } | |
1052 | return; | |
1053 | } | |
1054 | ||
05e451f8 | 1055 | source->source_channel_oil = pim_channel_oil_add(&sg, |
12e41d03 DL |
1056 | input_iface_vif_index); |
1057 | if (!source->source_channel_oil) { | |
8711a53d DS |
1058 | if (PIM_DEBUG_IGMP_TRACE) |
1059 | { | |
1060 | zlog_debug("%s %s: could not create OIL for channel (S,G)=%s", | |
1061 | __FILE__, __PRETTY_FUNCTION__, | |
1062 | pim_str_sg_dump (&sg)); | |
1063 | } | |
12e41d03 DL |
1064 | return; |
1065 | } | |
1066 | } | |
1067 | ||
1865a44a DS |
1068 | result = pim_channel_add_oif(source->source_channel_oil, |
1069 | group->group_igmp_sock->interface, | |
1070 | PIM_OIF_FLAG_PROTO_IGMP); | |
12e41d03 | 1071 | if (result) { |
0afd31c9 DW |
1072 | if (PIM_DEBUG_MROUTE) |
1073 | { | |
1074 | zlog_warn("%s: add_oif() failed with return=%d", | |
1075 | __func__, result); | |
1076 | } | |
12e41d03 DL |
1077 | return; |
1078 | } | |
1079 | ||
1080 | /* | |
1081 | Feed IGMPv3-gathered local membership information into PIM | |
1082 | per-interface (S,G) state. | |
1083 | */ | |
69283639 | 1084 | pim_ifchannel_local_membership_add(group->group_igmp_sock->interface, &sg); |
12e41d03 DL |
1085 | |
1086 | IGMP_SOURCE_DO_FORWARDING(source->source_flags); | |
1087 | } | |
1088 | ||
1089 | /* | |
1090 | igmp_source_forward_stop: stop fowarding, but keep the source | |
1091 | igmp_source_delete: stop fowarding, and delete the source | |
1092 | */ | |
1093 | void igmp_source_forward_stop(struct igmp_source *source) | |
1094 | { | |
1095 | struct igmp_group *group; | |
4ed0af70 | 1096 | struct prefix_sg sg; |
12e41d03 DL |
1097 | int result; |
1098 | ||
02e6923e | 1099 | memset (&sg, 0, sizeof (struct prefix_sg)); |
4ed0af70 DS |
1100 | sg.src = source->source_addr; |
1101 | sg.grp = source->source_group->group_addr; | |
1103466b | 1102 | |
12e41d03 | 1103 | if (PIM_DEBUG_IGMP_TRACE) { |
1103466b | 1104 | zlog_debug("%s: (S,G)=%s igmp_sock=%d oif=%s fwd=%d", |
12e41d03 | 1105 | __PRETTY_FUNCTION__, |
1103466b | 1106 | pim_str_sg_dump (&sg), |
12e41d03 DL |
1107 | source->source_group->group_igmp_sock->fd, |
1108 | source->source_group->group_igmp_sock->interface->name, | |
1109 | IGMP_SOURCE_TEST_FORWARDING(source->source_flags)); | |
1110 | } | |
1111 | ||
1112 | /* Prevent IGMP interface from removing multicast route multiple | |
1113 | times */ | |
1114 | if (!IGMP_SOURCE_TEST_FORWARDING(source->source_flags)) { | |
1115 | return; | |
1116 | } | |
1117 | ||
1118 | group = source->source_group; | |
1119 | ||
1120 | /* | |
1121 | It appears that in certain circumstances that | |
1122 | igmp_source_forward_stop is called when IGMP forwarding | |
1123 | was not enabled in oif_flags for this outgoing interface. | |
1124 | Possibly because of multiple calls. When that happens, we | |
1125 | enter the below if statement and this function returns early | |
1126 | which in turn triggers the calling function to assert. | |
1127 | Making the call to del_oif and ignoring the return code | |
1128 | fixes the issue without ill effect, similar to | |
1129 | pim_forward_stop below. | |
1130 | */ | |
1131 | result = del_oif(source->source_channel_oil, | |
1132 | group->group_igmp_sock->interface, | |
1133 | PIM_OIF_FLAG_PROTO_IGMP); | |
1134 | if (result) { | |
8711a53d DS |
1135 | if (PIM_DEBUG_IGMP_TRACE) |
1136 | zlog_debug("%s: del_oif() failed with return=%d", | |
1137 | __func__, result); | |
12e41d03 DL |
1138 | return; |
1139 | } | |
1140 | ||
1141 | /* | |
1142 | Feed IGMPv3-gathered local membership information into PIM | |
1143 | per-interface (S,G) state. | |
1144 | */ | |
1145 | pim_ifchannel_local_membership_del(group->group_igmp_sock->interface, | |
1103466b | 1146 | &sg); |
12e41d03 DL |
1147 | |
1148 | IGMP_SOURCE_DONT_FORWARDING(source->source_flags); | |
1149 | } | |
1150 | ||
1151 | void pim_forward_start(struct pim_ifchannel *ch) | |
1152 | { | |
1153 | struct pim_upstream *up = ch->upstream; | |
1154 | ||
1155 | if (PIM_DEBUG_PIM_TRACE) { | |
eaa54bdb DW |
1156 | char source_str[INET_ADDRSTRLEN]; |
1157 | char group_str[INET_ADDRSTRLEN]; | |
1158 | char upstream_str[INET_ADDRSTRLEN]; | |
8f5f5e91 | 1159 | |
4ed0af70 DS |
1160 | pim_inet4_dump("<source?>", ch->sg.src, source_str, sizeof(source_str)); |
1161 | pim_inet4_dump("<group?>", ch->sg.grp, group_str, sizeof(group_str)); | |
8f5f5e91 DS |
1162 | pim_inet4_dump("<upstream?>", up->upstream_addr, upstream_str, sizeof(upstream_str)); |
1163 | zlog_debug("%s: (S,G)=(%s,%s) oif=%s(%s)", | |
12e41d03 | 1164 | __PRETTY_FUNCTION__, |
8f5f5e91 | 1165 | source_str, group_str, ch->interface->name, upstream_str); |
12e41d03 DL |
1166 | } |
1167 | ||
1168 | if (!up->channel_oil) { | |
8f5f5e91 | 1169 | int input_iface_vif_index = fib_lookup_if_vif_index(up->upstream_addr); |
12e41d03 | 1170 | if (input_iface_vif_index < 1) { |
8711a53d DS |
1171 | if (PIM_DEBUG_PIM_TRACE) |
1172 | { | |
1173 | char source_str[INET_ADDRSTRLEN]; | |
1174 | pim_inet4_dump("<source?>", up->sg.src, source_str, sizeof(source_str)); | |
1175 | zlog_debug("%s %s: could not find input interface for source %s", | |
1176 | __FILE__, __PRETTY_FUNCTION__, | |
1177 | source_str); | |
1178 | } | |
12e41d03 DL |
1179 | return; |
1180 | } | |
1181 | ||
05e451f8 | 1182 | up->channel_oil = pim_channel_oil_add(&up->sg, |
12e41d03 DL |
1183 | input_iface_vif_index); |
1184 | if (!up->channel_oil) { | |
8711a53d DS |
1185 | if (PIM_DEBUG_PIM_TRACE) |
1186 | zlog_debug("%s %s: could not create OIL for channel (S,G)=%s", | |
1187 | __FILE__, __PRETTY_FUNCTION__, | |
8bfb8b67 | 1188 | up->sg_str); |
12e41d03 DL |
1189 | return; |
1190 | } | |
1191 | } | |
1192 | ||
1865a44a DS |
1193 | pim_channel_add_oif(up->channel_oil, |
1194 | ch->interface, | |
1195 | PIM_OIF_FLAG_PROTO_PIM); | |
12e41d03 DL |
1196 | } |
1197 | ||
1198 | void pim_forward_stop(struct pim_ifchannel *ch) | |
1199 | { | |
1200 | struct pim_upstream *up = ch->upstream; | |
1201 | ||
1202 | if (PIM_DEBUG_PIM_TRACE) { | |
05e451f8 | 1203 | zlog_debug("%s: (S,G)=%s oif=%s", |
12e41d03 | 1204 | __PRETTY_FUNCTION__, |
8bfb8b67 | 1205 | ch->sg_str, ch->interface->name); |
12e41d03 DL |
1206 | } |
1207 | ||
1208 | if (!up->channel_oil) { | |
8711a53d DS |
1209 | if (PIM_DEBUG_PIM_TRACE) |
1210 | zlog_debug("%s: (S,G)=%s oif=%s missing channel OIL", | |
1211 | __PRETTY_FUNCTION__, | |
8bfb8b67 | 1212 | ch->sg_str, ch->interface->name); |
12e41d03 DL |
1213 | |
1214 | return; | |
1215 | } | |
1216 | ||
1217 | del_oif(up->channel_oil, | |
1218 | ch->interface, | |
1219 | PIM_OIF_FLAG_PROTO_PIM); | |
1220 | } |