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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; | |
7bfa6175 | 226 | struct in_addr old = { .s_addr = 0 }; |
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 | ||
240 | p = c->address; | |
d8424057 | 241 | |
12e41d03 DL |
242 | if (PIM_DEBUG_ZEBRA) { |
243 | char buf[BUFSIZ]; | |
244 | prefix2str(p, buf, BUFSIZ); | |
245 | zlog_debug("%s: %s connected IP address %s flags %u %s", | |
246 | __PRETTY_FUNCTION__, | |
247 | c->ifp->name, buf, c->flags, | |
248 | CHECK_FLAG(c->flags, ZEBRA_IFA_SECONDARY) ? "secondary" : "primary"); | |
249 | ||
250 | #ifdef PIM_DEBUG_IFADDR_DUMP | |
251 | dump_if_address(c->ifp); | |
252 | #endif | |
253 | } | |
254 | ||
d8424057 DS |
255 | if (p->family != AF_INET) |
256 | { | |
257 | struct pim_interface *pim_ifp = c->ifp->info; | |
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 | ||
7bfa6175 DS |
276 | pim_rp_check_rp (old, p->u.prefix4); |
277 | ||
12e41d03 DL |
278 | if (!CHECK_FLAG(c->flags, ZEBRA_IFA_SECONDARY)) { |
279 | /* trying to add primary address */ | |
280 | ||
281 | struct in_addr primary_addr = pim_find_primary_addr(c->ifp); | |
282 | if (primary_addr.s_addr != p->u.prefix4.s_addr) { | |
c5cb17ec DS |
283 | if (PIM_DEBUG_ZEBRA) { |
284 | /* but we had a primary address already */ | |
12e41d03 | 285 | |
c5cb17ec DS |
286 | char buf[BUFSIZ]; |
287 | char old[100]; | |
12e41d03 | 288 | |
c5cb17ec DS |
289 | prefix2str(p, buf, BUFSIZ); |
290 | pim_inet4_dump("<old?>", primary_addr, old, sizeof(old)); | |
12e41d03 | 291 | |
c5cb17ec DS |
292 | zlog_warn("%s: %s primary addr old=%s: forcing secondary flag on new=%s", |
293 | __PRETTY_FUNCTION__, | |
294 | c->ifp->name, old, buf); | |
295 | } | |
12e41d03 DL |
296 | SET_FLAG(c->flags, ZEBRA_IFA_SECONDARY); |
297 | } | |
298 | } | |
299 | ||
300 | pim_if_addr_add(c); | |
301 | ||
d8424057 DS |
302 | if (if_is_loopback (c->ifp)) |
303 | { | |
304 | struct listnode *ifnode; | |
305 | struct interface *ifp; | |
306 | ||
307 | for (ALL_LIST_ELEMENTS_RO (vrf_iflist (VRF_DEFAULT), ifnode, ifp)) | |
308 | { | |
309 | if (!if_is_loopback (ifp) && if_is_operative (ifp)) | |
310 | pim_if_addr_add_all (ifp); | |
311 | } | |
312 | } | |
313 | ||
12e41d03 DL |
314 | return 0; |
315 | } | |
316 | ||
317 | static int pim_zebra_if_address_del(int command, struct zclient *client, | |
469351b3 | 318 | zebra_size_t length, vrf_id_t vrf_id) |
12e41d03 DL |
319 | { |
320 | struct connected *c; | |
321 | struct prefix *p; | |
7bfa6175 | 322 | struct in_addr new = { .s_addr = 0 }; |
12e41d03 | 323 | |
12e41d03 DL |
324 | /* |
325 | zebra api notifies address adds/dels events by using the same call | |
326 | interface_add_read below, see comments in lib/zclient.c | |
327 | ||
328 | zebra_interface_address_read(ZEBRA_INTERFACE_ADDRESS_DELETE, ...) | |
329 | will remove address from interface list by calling | |
330 | connected_delete_by_prefix() | |
331 | */ | |
469351b3 | 332 | c = zebra_interface_address_read(command, client->ibuf, vrf_id); |
12e41d03 DL |
333 | if (!c) |
334 | return 0; | |
335 | ||
336 | p = c->address; | |
337 | if (p->family != AF_INET) | |
338 | return 0; | |
339 | ||
340 | if (PIM_DEBUG_ZEBRA) { | |
341 | char buf[BUFSIZ]; | |
342 | prefix2str(p, buf, BUFSIZ); | |
343 | zlog_debug("%s: %s disconnected IP address %s flags %u %s", | |
344 | __PRETTY_FUNCTION__, | |
345 | c->ifp->name, buf, c->flags, | |
346 | CHECK_FLAG(c->flags, ZEBRA_IFA_SECONDARY) ? "secondary" : "primary"); | |
347 | ||
348 | #ifdef PIM_DEBUG_IFADDR_DUMP | |
349 | dump_if_address(c->ifp); | |
350 | #endif | |
351 | } | |
352 | ||
7bfa6175 | 353 | pim_rp_check_rp (p->u.prefix4, new); |
12e41d03 DL |
354 | pim_if_addr_del(c, 0); |
355 | ||
356 | return 0; | |
357 | } | |
358 | ||
359 | static void scan_upstream_rpf_cache() | |
360 | { | |
361 | struct listnode *up_node; | |
362 | struct listnode *up_nextnode; | |
363 | struct pim_upstream *up; | |
364 | ||
365 | for (ALL_LIST_ELEMENTS(qpim_upstream_list, up_node, up_nextnode, up)) { | |
366 | struct in_addr old_rpf_addr; | |
7747bad6 | 367 | struct interface *old_interface; |
12e41d03 DL |
368 | enum pim_rpf_result rpf_result; |
369 | ||
7747bad6 | 370 | old_interface = up->rpf.source_nexthop.interface; |
f24405b1 | 371 | rpf_result = pim_rpf_update(up, &old_rpf_addr); |
12e41d03 DL |
372 | if (rpf_result == PIM_RPF_FAILURE) |
373 | continue; | |
374 | ||
375 | if (rpf_result == PIM_RPF_CHANGED) { | |
376 | ||
377 | if (up->join_state == PIM_UPSTREAM_JOINED) { | |
34fe48e7 DS |
378 | /* |
379 | * If we come up real fast we can be here | |
380 | * where the mroute has not been installed | |
381 | * so install it. | |
382 | */ | |
3f07087b | 383 | if (up->channel_oil && !up->channel_oil->installed) |
34fe48e7 DS |
384 | pim_mroute_add (up->channel_oil); |
385 | ||
12e41d03 DL |
386 | /* |
387 | RFC 4601: 4.5.7. Sending (S,G) Join/Prune Messages | |
388 | ||
389 | Transitions from Joined State | |
390 | ||
391 | RPF'(S,G) changes not due to an Assert | |
392 | ||
393 | The upstream (S,G) state machine remains in Joined | |
394 | state. Send Join(S,G) to the new upstream neighbor, which is | |
395 | the new value of RPF'(S,G). Send Prune(S,G) to the old | |
396 | upstream neighbor, which is the old value of RPF'(S,G). Set | |
397 | the Join Timer (JT) to expire after t_periodic seconds. | |
398 | */ | |
399 | ||
400 | ||
401 | /* send Prune(S,G) to the old upstream neighbor */ | |
7747bad6 DS |
402 | pim_joinprune_send(old_interface, old_rpf_addr, |
403 | &up->sg, 0 /* prune */); | |
12e41d03 DL |
404 | |
405 | /* send Join(S,G) to the current upstream neighbor */ | |
406 | pim_joinprune_send(up->rpf.source_nexthop.interface, | |
63c59d0c | 407 | up->rpf.rpf_addr.u.prefix4, |
05e451f8 | 408 | &up->sg, |
12e41d03 DL |
409 | 1 /* join */); |
410 | ||
411 | pim_upstream_join_timer_restart(up); | |
412 | } /* up->join_state == PIM_UPSTREAM_JOINED */ | |
413 | ||
414 | /* FIXME can join_desired actually be changed by pim_rpf_update() | |
415 | returning PIM_RPF_CHANGED ? */ | |
416 | pim_upstream_update_join_desired(up); | |
417 | ||
418 | } /* PIM_RPF_CHANGED */ | |
419 | ||
420 | } /* for (qpim_upstream_list) */ | |
421 | ||
422 | } | |
423 | ||
8a67a996 DS |
424 | void |
425 | pim_scan_individual_oil (struct channel_oil *c_oil) | |
12e41d03 | 426 | { |
60cd0356 DS |
427 | struct in_addr vif_source; |
428 | int input_iface_vif_index; | |
8a67a996 | 429 | int old_vif_index; |
12e41d03 | 430 | |
36d6bd7d | 431 | if (!pim_rp_set_upstream_addr (&vif_source, c_oil->oil.mfcc_origin, c_oil->oil.mfcc_mcastgrp)) |
60cd0356 DS |
432 | return; |
433 | ||
434 | input_iface_vif_index = fib_lookup_if_vif_index (vif_source); | |
8a67a996 DS |
435 | if (input_iface_vif_index < 1) |
436 | { | |
60cd0356 DS |
437 | if (PIM_DEBUG_ZEBRA) |
438 | { | |
439 | char source_str[100]; | |
440 | char group_str[100]; | |
441 | pim_inet4_dump("<source?>", c_oil->oil.mfcc_origin, source_str, sizeof(source_str)); | |
442 | pim_inet4_dump("<group?>", c_oil->oil.mfcc_mcastgrp, group_str, sizeof(group_str)); | |
443 | zlog_debug("%s %s: could not find input interface(%d) for (S,G)=(%s,%s)", | |
444 | __FILE__, __PRETTY_FUNCTION__, c_oil->oil.mfcc_parent, | |
445 | source_str, group_str); | |
446 | } | |
447 | pim_mroute_del (c_oil); | |
8a67a996 | 448 | return; |
12e41d03 DL |
449 | } |
450 | ||
8a67a996 DS |
451 | if (input_iface_vif_index == c_oil->oil.mfcc_parent) |
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); | |
461 | char source_str[100]; | |
462 | char group_str[100]; | |
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) { | |
478 | char source_str[100]; | |
479 | char group_str[100]; | |
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 | { |
12e41d03 DL |
498 | /* just log warning */ |
499 | struct interface *old_iif = pim_if_find_by_vif_index(old_vif_index); | |
500 | struct interface *new_iif = pim_if_find_by_vif_index(input_iface_vif_index); | |
501 | char source_str[100]; | |
502 | char group_str[100]; | |
503 | pim_inet4_dump("<source?>", c_oil->oil.mfcc_origin, source_str, sizeof(source_str)); | |
504 | pim_inet4_dump("<group?>", c_oil->oil.mfcc_mcastgrp, group_str, sizeof(group_str)); | |
505 | zlog_warn("%s %s: (S,G)=(%s,%s) failure updating input interface from %s vif_index=%d to %s vif_index=%d", | |
8a67a996 DS |
506 | __FILE__, __PRETTY_FUNCTION__, |
507 | source_str, group_str, | |
508 | old_iif ? old_iif->name : "<old_iif?>", c_oil->oil.mfcc_parent, | |
509 | new_iif ? new_iif->name : "<new_iif?>", input_iface_vif_index); | |
12e41d03 | 510 | } |
8a67a996 DS |
511 | } |
512 | ||
513 | void pim_scan_oil() | |
514 | { | |
515 | struct listnode *node; | |
516 | struct listnode *nextnode; | |
517 | struct channel_oil *c_oil; | |
518 | ||
519 | qpim_scan_oil_last = pim_time_monotonic_sec(); | |
520 | ++qpim_scan_oil_events; | |
12e41d03 | 521 | |
8a67a996 DS |
522 | for (ALL_LIST_ELEMENTS(qpim_channel_oil_list, node, nextnode, c_oil)) |
523 | pim_scan_individual_oil (c_oil); | |
12e41d03 DL |
524 | } |
525 | ||
526 | static int on_rpf_cache_refresh(struct thread *t) | |
527 | { | |
528 | zassert(t); | |
529 | zassert(qpim_rpf_cache_refresher); | |
530 | ||
531 | qpim_rpf_cache_refresher = 0; | |
532 | ||
533 | /* update PIM protocol state */ | |
534 | scan_upstream_rpf_cache(); | |
535 | ||
536 | /* update kernel multicast forwarding cache (MFC) */ | |
537 | pim_scan_oil(); | |
538 | ||
539 | qpim_rpf_cache_refresh_last = pim_time_monotonic_sec(); | |
540 | ++qpim_rpf_cache_refresh_events; | |
541 | ||
00d07c6f | 542 | pim_rp_setup (); |
12e41d03 DL |
543 | return 0; |
544 | } | |
545 | ||
546 | static void sched_rpf_cache_refresh() | |
547 | { | |
548 | ++qpim_rpf_cache_refresh_requests; | |
549 | ||
550 | if (qpim_rpf_cache_refresher) { | |
551 | /* Refresh timer is already running */ | |
552 | return; | |
553 | } | |
554 | ||
555 | /* Start refresh timer */ | |
556 | ||
557 | if (PIM_DEBUG_ZEBRA) { | |
558 | zlog_debug("%s: triggering %ld msec timer", | |
559 | __PRETTY_FUNCTION__, | |
560 | qpim_rpf_cache_refresh_delay_msec); | |
561 | } | |
562 | ||
563 | THREAD_TIMER_MSEC_ON(master, qpim_rpf_cache_refresher, | |
564 | on_rpf_cache_refresh, | |
565 | 0, qpim_rpf_cache_refresh_delay_msec); | |
566 | } | |
567 | ||
568 | static int redist_read_ipv4_route(int command, struct zclient *zclient, | |
469351b3 | 569 | zebra_size_t length, vrf_id_t vrf_id) |
12e41d03 DL |
570 | { |
571 | struct stream *s; | |
572 | struct zapi_ipv4 api; | |
b892f1dd | 573 | ifindex_t ifindex; |
12e41d03 DL |
574 | struct in_addr nexthop; |
575 | struct prefix_ipv4 p; | |
576 | int min_len = 4; | |
577 | ||
578 | if (length < min_len) { | |
579 | zlog_warn("%s %s: short buffer: length=%d min=%d", | |
580 | __FILE__, __PRETTY_FUNCTION__, | |
581 | length, min_len); | |
582 | return -1; | |
583 | } | |
584 | ||
585 | s = zclient->ibuf; | |
586 | ifindex = 0; | |
587 | nexthop.s_addr = 0; | |
588 | ||
589 | /* Type, flags, message. */ | |
590 | api.type = stream_getc(s); | |
5d3c5e6d | 591 | api.instance = stream_getw (s); |
0fc452dc | 592 | api.flags = stream_getl(s); |
12e41d03 DL |
593 | api.message = stream_getc(s); |
594 | ||
595 | /* IPv4 prefix length. */ | |
596 | memset(&p, 0, sizeof(struct prefix_ipv4)); | |
597 | p.family = AF_INET; | |
598 | p.prefixlen = stream_getc(s); | |
599 | ||
600 | min_len += | |
601 | PSIZE(p.prefixlen) + | |
602 | CHECK_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP) ? 5 : 0 + | |
603 | CHECK_FLAG(api.message, ZAPI_MESSAGE_IFINDEX) ? 5 : 0 + | |
604 | CHECK_FLAG(api.message, ZAPI_MESSAGE_DISTANCE) ? 1 : 0 + | |
605 | CHECK_FLAG(api.message, ZAPI_MESSAGE_METRIC) ? 4 : 0; | |
606 | ||
607 | if (PIM_DEBUG_ZEBRA) { | |
608 | zlog_debug("%s %s: length=%d min_len=%d flags=%s%s%s%s", | |
609 | __FILE__, __PRETTY_FUNCTION__, | |
610 | length, min_len, | |
611 | CHECK_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP) ? "nh" : "", | |
612 | CHECK_FLAG(api.message, ZAPI_MESSAGE_IFINDEX) ? " ifi" : "", | |
613 | CHECK_FLAG(api.message, ZAPI_MESSAGE_DISTANCE) ? " dist" : "", | |
614 | CHECK_FLAG(api.message, ZAPI_MESSAGE_METRIC) ? " metr" : ""); | |
615 | } | |
616 | ||
617 | if (length < min_len) { | |
618 | zlog_warn("%s %s: short buffer: length=%d min_len=%d flags=%s%s%s%s", | |
619 | __FILE__, __PRETTY_FUNCTION__, | |
620 | length, min_len, | |
621 | CHECK_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP) ? "nh" : "", | |
622 | CHECK_FLAG(api.message, ZAPI_MESSAGE_IFINDEX) ? " ifi" : "", | |
623 | CHECK_FLAG(api.message, ZAPI_MESSAGE_DISTANCE) ? " dist" : "", | |
624 | CHECK_FLAG(api.message, ZAPI_MESSAGE_METRIC) ? " metr" : ""); | |
625 | return -1; | |
626 | } | |
627 | ||
628 | /* IPv4 prefix. */ | |
629 | stream_get(&p.prefix, s, PSIZE(p.prefixlen)); | |
630 | ||
631 | /* Nexthop, ifindex, distance, metric. */ | |
632 | if (CHECK_FLAG(api.message, ZAPI_MESSAGE_NEXTHOP)) { | |
633 | api.nexthop_num = stream_getc(s); | |
634 | nexthop.s_addr = stream_get_ipv4(s); | |
635 | } | |
636 | if (CHECK_FLAG(api.message, ZAPI_MESSAGE_IFINDEX)) { | |
637 | api.ifindex_num = stream_getc(s); | |
638 | ifindex = stream_getl(s); | |
639 | } | |
640 | ||
641 | api.distance = CHECK_FLAG(api.message, ZAPI_MESSAGE_DISTANCE) ? | |
642 | stream_getc(s) : | |
643 | 0; | |
644 | ||
645 | api.metric = CHECK_FLAG(api.message, ZAPI_MESSAGE_METRIC) ? | |
646 | stream_getl(s) : | |
647 | 0; | |
648 | ||
5d3c5e6d | 649 | if (CHECK_FLAG (api.message, ZAPI_MESSAGE_TAG)) |
dc9ffce8 | 650 | api.tag = stream_getl (s); |
5d3c5e6d DS |
651 | else |
652 | api.tag = 0; | |
653 | ||
12e41d03 | 654 | switch (command) { |
5d3c5e6d | 655 | case ZEBRA_REDISTRIBUTE_IPV4_ADD: |
12e41d03 DL |
656 | if (PIM_DEBUG_ZEBRA) { |
657 | char buf[2][INET_ADDRSTRLEN]; | |
658 | zlog_debug("%s: add %s %s/%d " | |
b892f1dd | 659 | "nexthop %s ifindex %d metric%s %u distance%s %u", |
12e41d03 DL |
660 | __PRETTY_FUNCTION__, |
661 | zebra_route_string(api.type), | |
662 | inet_ntop(AF_INET, &p.prefix, buf[0], sizeof(buf[0])), | |
663 | p.prefixlen, | |
664 | inet_ntop(AF_INET, &nexthop, buf[1], sizeof(buf[1])), | |
665 | ifindex, | |
666 | CHECK_FLAG(api.message, ZAPI_MESSAGE_METRIC) ? "-recv" : "-miss", | |
667 | api.metric, | |
668 | CHECK_FLAG(api.message, ZAPI_MESSAGE_DISTANCE) ? "-recv" : "-miss", | |
669 | api.distance); | |
670 | } | |
671 | break; | |
5d3c5e6d | 672 | case ZEBRA_REDISTRIBUTE_IPV4_DEL: |
12e41d03 DL |
673 | if (PIM_DEBUG_ZEBRA) { |
674 | char buf[2][INET_ADDRSTRLEN]; | |
675 | zlog_debug("%s: delete %s %s/%d " | |
b892f1dd | 676 | "nexthop %s ifindex %d metric%s %u distance%s %u", |
12e41d03 DL |
677 | __PRETTY_FUNCTION__, |
678 | zebra_route_string(api.type), | |
679 | inet_ntop(AF_INET, &p.prefix, buf[0], sizeof(buf[0])), | |
680 | p.prefixlen, | |
681 | inet_ntop(AF_INET, &nexthop, buf[1], sizeof(buf[1])), | |
682 | ifindex, | |
683 | CHECK_FLAG(api.message, ZAPI_MESSAGE_METRIC) ? "-recv" : "-miss", | |
684 | api.metric, | |
685 | CHECK_FLAG(api.message, ZAPI_MESSAGE_DISTANCE) ? "-recv" : "-miss", | |
686 | api.distance); | |
687 | } | |
688 | break; | |
689 | default: | |
690 | zlog_warn("%s: unknown command=%d", __PRETTY_FUNCTION__, command); | |
691 | return -1; | |
692 | } | |
693 | ||
694 | sched_rpf_cache_refresh(); | |
695 | ||
00d07c6f | 696 | pim_rp_setup (); |
12e41d03 DL |
697 | return 0; |
698 | } | |
699 | ||
48e8451b DS |
700 | static void |
701 | pim_zebra_connected (struct zclient *zclient) | |
702 | { | |
703 | zclient_send_reg_requests (zclient, VRF_DEFAULT); | |
704 | } | |
12e41d03 DL |
705 | void pim_zebra_init(char *zebra_sock_path) |
706 | { | |
707 | int i; | |
708 | ||
709 | if (zebra_sock_path) | |
710 | zclient_serv_path_set(zebra_sock_path); | |
711 | ||
712 | #ifdef HAVE_TCP_ZEBRA | |
713 | zlog_notice("zclient update contacting ZEBRA daemon at socket TCP %s,%d", "127.0.0.1", ZEBRA_PORT); | |
714 | #else | |
715 | zlog_notice("zclient update contacting ZEBRA daemon at socket UNIX %s", zclient_serv_path_get()); | |
716 | #endif | |
717 | ||
718 | /* Socket for receiving updates from Zebra daemon */ | |
469351b3 | 719 | qpim_zclient_update = zclient_new (master); |
12e41d03 | 720 | |
48e8451b | 721 | qpim_zclient_update->zebra_connected = pim_zebra_connected; |
12e41d03 DL |
722 | qpim_zclient_update->router_id_update = pim_router_id_update_zebra; |
723 | qpim_zclient_update->interface_add = pim_zebra_if_add; | |
724 | qpim_zclient_update->interface_delete = pim_zebra_if_del; | |
725 | qpim_zclient_update->interface_up = pim_zebra_if_state_up; | |
726 | qpim_zclient_update->interface_down = pim_zebra_if_state_down; | |
727 | qpim_zclient_update->interface_address_add = pim_zebra_if_address_add; | |
728 | qpim_zclient_update->interface_address_delete = pim_zebra_if_address_del; | |
5d3c5e6d DS |
729 | qpim_zclient_update->redistribute_route_ipv4_add = redist_read_ipv4_route; |
730 | qpim_zclient_update->redistribute_route_ipv4_del = redist_read_ipv4_route; | |
12e41d03 | 731 | |
469351b3 | 732 | zclient_init(qpim_zclient_update, ZEBRA_ROUTE_PIM, 0); |
12e41d03 DL |
733 | if (PIM_DEBUG_PIM_TRACE) { |
734 | zlog_info("zclient_init cleared redistribution request"); | |
735 | } | |
736 | ||
737 | zassert(qpim_zclient_update->redist_default == ZEBRA_ROUTE_PIM); | |
738 | ||
739 | /* Request all redistribution */ | |
740 | for (i = 0; i < ZEBRA_ROUTE_MAX; i++) { | |
741 | if (i == qpim_zclient_update->redist_default) | |
742 | continue; | |
469351b3 | 743 | vrf_bitmap_set (qpim_zclient_update->redist[AFI_IP][i], VRF_DEFAULT);; |
12e41d03 DL |
744 | if (PIM_DEBUG_PIM_TRACE) { |
745 | zlog_debug("%s: requesting redistribution for %s (%i)", | |
746 | __PRETTY_FUNCTION__, zebra_route_string(i), i); | |
747 | } | |
748 | } | |
749 | ||
750 | /* Request default information */ | |
751 | zclient_redistribute_default (ZEBRA_REDISTRIBUTE_DEFAULT_ADD, | |
752 | qpim_zclient_update, VRF_DEFAULT); | |
753 | ||
754 | if (PIM_DEBUG_PIM_TRACE) { | |
755 | zlog_info("%s: requesting default information redistribution", | |
756 | __PRETTY_FUNCTION__); | |
757 | ||
758 | zlog_notice("%s: zclient update socket initialized", | |
759 | __PRETTY_FUNCTION__); | |
760 | } | |
761 | ||
05b0d0d0 | 762 | zclient_lookup_new(); |
12e41d03 DL |
763 | } |
764 | ||
765 | void igmp_anysource_forward_start(struct igmp_group *group) | |
766 | { | |
cab8707e DS |
767 | struct igmp_source *source; |
768 | struct in_addr src_addr = { .s_addr = 0 }; | |
12e41d03 DL |
769 | /* Any source (*,G) is forwarded only if mode is EXCLUDE {empty} */ |
770 | zassert(group->group_filtermode_isexcl); | |
771 | zassert(listcount(group->group_source_list) < 1); | |
772 | ||
cab8707e DS |
773 | source = source_new (group, src_addr); |
774 | if (!source) | |
775 | { | |
776 | zlog_warn ("%s: Failure to create * source", __PRETTY_FUNCTION__); | |
777 | return; | |
778 | } | |
779 | ||
780 | igmp_source_forward_start (source); | |
12e41d03 DL |
781 | } |
782 | ||
783 | void igmp_anysource_forward_stop(struct igmp_group *group) | |
784 | { | |
2560106c DS |
785 | struct igmp_source *source; |
786 | struct in_addr star = { .s_addr = 0 }; | |
12e41d03 | 787 | |
2560106c DS |
788 | source = igmp_find_source_by_addr (group, star); |
789 | if (source) | |
790 | igmp_source_forward_stop (source); | |
12e41d03 DL |
791 | } |
792 | ||
793 | static int fib_lookup_if_vif_index(struct in_addr addr) | |
794 | { | |
7b2c4d16 | 795 | struct pim_zlookup_nexthop nexthop_tab[MULTIPATH_NUM]; |
12e41d03 DL |
796 | int num_ifindex; |
797 | int vif_index; | |
b892f1dd | 798 | ifindex_t first_ifindex; |
12e41d03 | 799 | |
05b0d0d0 | 800 | num_ifindex = zclient_lookup_nexthop(nexthop_tab, |
7b2c4d16 | 801 | MULTIPATH_NUM, addr, |
12e41d03 DL |
802 | PIM_NEXTHOP_LOOKUP_MAX); |
803 | if (num_ifindex < 1) { | |
804 | char addr_str[100]; | |
805 | pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str)); | |
806 | zlog_warn("%s %s: could not find nexthop ifindex for address %s", | |
807 | __FILE__, __PRETTY_FUNCTION__, | |
808 | addr_str); | |
809 | return -1; | |
810 | } | |
811 | ||
812 | first_ifindex = nexthop_tab[0].ifindex; | |
813 | ||
814 | if (num_ifindex > 1) { | |
815 | char addr_str[100]; | |
816 | pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str)); | |
7adf0260 | 817 | zlog_info("%s %s: FIXME ignoring multiple nexthop ifindex'es num_ifindex=%d for address %s (using only ifindex=%d)", |
12e41d03 DL |
818 | __FILE__, __PRETTY_FUNCTION__, |
819 | num_ifindex, addr_str, first_ifindex); | |
820 | /* debug warning only, do not return */ | |
821 | } | |
822 | ||
823 | if (PIM_DEBUG_ZEBRA) { | |
824 | char addr_str[100]; | |
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) { |
12e41d03 DL |
834 | char addr_str[100]; |
835 | pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str)); | |
836 | zlog_warn("%s %s: low vif_index=%d < 1 nexthop for address %s", | |
837 | __FILE__, __PRETTY_FUNCTION__, | |
838 | vif_index, addr_str); | |
839 | return -2; | |
840 | } | |
841 | ||
842 | zassert(qpim_mroute_oif_highest_vif_index < MAXVIFS); | |
843 | ||
844 | if (vif_index > qpim_mroute_oif_highest_vif_index) { | |
845 | char addr_str[100]; | |
846 | pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str)); | |
847 | zlog_warn("%s %s: high vif_index=%d > highest_vif_index=%d nexthop for address %s", | |
848 | __FILE__, __PRETTY_FUNCTION__, | |
849 | vif_index, qpim_mroute_oif_highest_vif_index, addr_str); | |
850 | ||
851 | zlog_warn("%s %s: pim disabled on interface %s vif_index=%d ?", | |
852 | __FILE__, __PRETTY_FUNCTION__, | |
853 | ifindex2ifname(vif_index), | |
854 | vif_index); | |
855 | ||
856 | return -3; | |
857 | } | |
858 | ||
859 | return vif_index; | |
860 | } | |
861 | ||
12e41d03 DL |
862 | static int del_oif(struct channel_oil *channel_oil, |
863 | struct interface *oif, | |
864 | uint32_t proto_mask) | |
865 | { | |
866 | struct pim_interface *pim_ifp; | |
867 | int old_ttl; | |
868 | ||
869 | zassert(channel_oil); | |
870 | ||
871 | pim_ifp = oif->info; | |
872 | ||
873 | zassert(pim_ifp->mroute_vif_index >= 1); | |
874 | zassert(qpim_mroute_oif_highest_vif_index < MAXVIFS); | |
875 | zassert(pim_ifp->mroute_vif_index <= qpim_mroute_oif_highest_vif_index); | |
876 | ||
877 | if (PIM_DEBUG_MROUTE) { | |
878 | char group_str[100]; | |
879 | char source_str[100]; | |
880 | pim_inet4_dump("<group?>", channel_oil->oil.mfcc_mcastgrp, group_str, sizeof(group_str)); | |
881 | pim_inet4_dump("<source?>", channel_oil->oil.mfcc_origin, source_str, sizeof(source_str)); | |
882 | zlog_debug("%s %s: (S,G)=(%s,%s): proto_mask=%u OIF=%s vif_index=%d", | |
883 | __FILE__, __PRETTY_FUNCTION__, | |
884 | source_str, group_str, | |
885 | proto_mask, oif->name, pim_ifp->mroute_vif_index); | |
886 | } | |
887 | ||
888 | /* Prevent single protocol from unsubscribing same interface from | |
889 | channel (S,G) multiple times */ | |
890 | if (!(channel_oil->oif_flags[pim_ifp->mroute_vif_index] & proto_mask)) { | |
891 | char group_str[100]; | |
892 | char source_str[100]; | |
893 | pim_inet4_dump("<group?>", channel_oil->oil.mfcc_mcastgrp, group_str, sizeof(group_str)); | |
894 | pim_inet4_dump("<source?>", channel_oil->oil.mfcc_origin, source_str, sizeof(source_str)); | |
895 | zlog_warn("%s %s: nonexistent protocol mask %u removed OIF %s (vif_index=%d, min_ttl=%d) from channel (S,G)=(%s,%s)", | |
896 | __FILE__, __PRETTY_FUNCTION__, | |
897 | proto_mask, oif->name, pim_ifp->mroute_vif_index, | |
898 | channel_oil->oil.mfcc_ttls[pim_ifp->mroute_vif_index], | |
899 | source_str, group_str); | |
900 | return -2; | |
901 | } | |
902 | ||
903 | /* Mark that protocol is no longer interested in this OIF */ | |
904 | channel_oil->oif_flags[pim_ifp->mroute_vif_index] &= ~proto_mask; | |
905 | ||
906 | /* Allow multiple protocols to unsubscribe same interface from | |
907 | channel (S,G) multiple times, by silently ignoring requests while | |
908 | there is at least one protocol interested in the channel */ | |
909 | if (channel_oil->oif_flags[pim_ifp->mroute_vif_index] & PIM_OIF_FLAG_PROTO_ANY) { | |
910 | ||
911 | /* Check the OIF keeps existing before returning, and only log | |
912 | warning otherwise */ | |
913 | if (channel_oil->oil.mfcc_ttls[pim_ifp->mroute_vif_index] < 1) { | |
914 | char group_str[100]; | |
915 | char source_str[100]; | |
916 | pim_inet4_dump("<group?>", channel_oil->oil.mfcc_mcastgrp, group_str, sizeof(group_str)); | |
917 | pim_inet4_dump("<source?>", channel_oil->oil.mfcc_origin, source_str, sizeof(source_str)); | |
918 | zlog_warn("%s %s: protocol mask %u removing nonexistent OIF %s (vif_index=%d, min_ttl=%d) from channel (S,G)=(%s,%s)", | |
919 | __FILE__, __PRETTY_FUNCTION__, | |
920 | proto_mask, oif->name, pim_ifp->mroute_vif_index, | |
921 | channel_oil->oil.mfcc_ttls[pim_ifp->mroute_vif_index], | |
922 | source_str, group_str); | |
923 | } | |
924 | ||
925 | return 0; | |
926 | } | |
927 | ||
928 | old_ttl = channel_oil->oil.mfcc_ttls[pim_ifp->mroute_vif_index]; | |
929 | ||
930 | if (old_ttl < 1) { | |
931 | char group_str[100]; | |
932 | char source_str[100]; | |
933 | pim_inet4_dump("<group?>", channel_oil->oil.mfcc_mcastgrp, group_str, sizeof(group_str)); | |
934 | pim_inet4_dump("<source?>", channel_oil->oil.mfcc_origin, source_str, sizeof(source_str)); | |
935 | zlog_warn("%s %s: interface %s (vif_index=%d) is not output for channel (S,G)=(%s,%s)", | |
936 | __FILE__, __PRETTY_FUNCTION__, | |
937 | oif->name, pim_ifp->mroute_vif_index, | |
938 | source_str, group_str); | |
939 | return -3; | |
940 | } | |
941 | ||
942 | channel_oil->oil.mfcc_ttls[pim_ifp->mroute_vif_index] = 0; | |
943 | ||
c171d6d8 | 944 | if (pim_mroute_add(channel_oil)) { |
12e41d03 DL |
945 | char group_str[100]; |
946 | char source_str[100]; | |
947 | pim_inet4_dump("<group?>", channel_oil->oil.mfcc_mcastgrp, group_str, sizeof(group_str)); | |
948 | pim_inet4_dump("<source?>", channel_oil->oil.mfcc_origin, source_str, sizeof(source_str)); | |
949 | zlog_warn("%s %s: could not remove output interface %s (vif_index=%d) from channel (S,G)=(%s,%s)", | |
950 | __FILE__, __PRETTY_FUNCTION__, | |
951 | oif->name, pim_ifp->mroute_vif_index, | |
952 | source_str, group_str); | |
953 | ||
954 | channel_oil->oil.mfcc_ttls[pim_ifp->mroute_vif_index] = old_ttl; | |
955 | return -4; | |
956 | } | |
957 | ||
958 | --channel_oil->oil_size; | |
959 | ||
960 | if (channel_oil->oil_size < 1) { | |
c171d6d8 | 961 | if (pim_mroute_del(channel_oil)) { |
12e41d03 DL |
962 | /* just log a warning in case of failure */ |
963 | char group_str[100]; | |
964 | char source_str[100]; | |
965 | pim_inet4_dump("<group?>", channel_oil->oil.mfcc_mcastgrp, group_str, sizeof(group_str)); | |
966 | pim_inet4_dump("<source?>", channel_oil->oil.mfcc_origin, source_str, sizeof(source_str)); | |
967 | zlog_warn("%s %s: failure removing OIL for channel (S,G)=(%s,%s)", | |
968 | __FILE__, __PRETTY_FUNCTION__, | |
969 | source_str, group_str); | |
970 | } | |
971 | } | |
972 | ||
973 | if (PIM_DEBUG_MROUTE) { | |
974 | char group_str[100]; | |
975 | char source_str[100]; | |
976 | pim_inet4_dump("<group?>", channel_oil->oil.mfcc_mcastgrp, group_str, sizeof(group_str)); | |
977 | pim_inet4_dump("<source?>", channel_oil->oil.mfcc_origin, source_str, sizeof(source_str)); | |
978 | zlog_debug("%s %s: (S,G)=(%s,%s): proto_mask=%u OIF=%s vif_index=%d: DONE", | |
979 | __FILE__, __PRETTY_FUNCTION__, | |
980 | source_str, group_str, | |
981 | proto_mask, oif->name, pim_ifp->mroute_vif_index); | |
982 | } | |
983 | ||
984 | return 0; | |
985 | } | |
986 | ||
987 | void igmp_source_forward_start(struct igmp_source *source) | |
988 | { | |
989 | struct igmp_group *group; | |
4ed0af70 | 990 | struct prefix_sg sg; |
12e41d03 DL |
991 | int result; |
992 | ||
02e6923e | 993 | memset (&sg, 0, sizeof (struct prefix_sg)); |
4ed0af70 DS |
994 | sg.src = source->source_addr; |
995 | sg.grp = source->source_group->group_addr; | |
05e451f8 | 996 | |
12e41d03 | 997 | if (PIM_DEBUG_IGMP_TRACE) { |
05e451f8 | 998 | zlog_debug("%s: (S,G)=%s igmp_sock=%d oif=%s fwd=%d", |
12e41d03 | 999 | __PRETTY_FUNCTION__, |
05e451f8 | 1000 | pim_str_sg_dump (&sg), |
12e41d03 DL |
1001 | source->source_group->group_igmp_sock->fd, |
1002 | source->source_group->group_igmp_sock->interface->name, | |
1003 | IGMP_SOURCE_TEST_FORWARDING(source->source_flags)); | |
1004 | } | |
1005 | ||
1006 | /* Prevent IGMP interface from installing multicast route multiple | |
1007 | times */ | |
1008 | if (IGMP_SOURCE_TEST_FORWARDING(source->source_flags)) { | |
1009 | return; | |
1010 | } | |
1011 | ||
1012 | group = source->source_group; | |
1013 | ||
1014 | if (!source->source_channel_oil) { | |
8f5f5e91 | 1015 | struct in_addr vif_source; |
12e41d03 | 1016 | struct pim_interface *pim_oif; |
8f5f5e91 | 1017 | |
36d6bd7d | 1018 | if (!pim_rp_set_upstream_addr (&vif_source, source->source_addr, sg.grp)) |
8f5f5e91 DS |
1019 | return; |
1020 | ||
1021 | int input_iface_vif_index = fib_lookup_if_vif_index(vif_source); | |
12e41d03 DL |
1022 | if (input_iface_vif_index < 1) { |
1023 | char source_str[100]; | |
1024 | pim_inet4_dump("<source?>", source->source_addr, source_str, sizeof(source_str)); | |
1025 | zlog_warn("%s %s: could not find input interface for source %s", | |
1026 | __FILE__, __PRETTY_FUNCTION__, | |
1027 | source_str); | |
1028 | return; | |
1029 | } | |
1030 | ||
1031 | /* | |
1032 | Protect IGMP against adding looped MFC entries created by both | |
1033 | source and receiver attached to the same interface. See TODO | |
1034 | T22. | |
1035 | */ | |
1036 | pim_oif = source->source_group->group_igmp_sock->interface->info; | |
1037 | if (!pim_oif) { | |
1038 | zlog_warn("%s: multicast not enabled on oif=%s ?", | |
1039 | __PRETTY_FUNCTION__, | |
1040 | source->source_group->group_igmp_sock->interface->name); | |
1041 | return; | |
1042 | } | |
1043 | if (pim_oif->mroute_vif_index < 1) { | |
1044 | zlog_warn("%s %s: oif=%s vif_index=%d < 1", | |
1045 | __FILE__, __PRETTY_FUNCTION__, | |
1046 | source->source_group->group_igmp_sock->interface->name, | |
1047 | pim_oif->mroute_vif_index); | |
1048 | return; | |
1049 | } | |
1050 | if (input_iface_vif_index == pim_oif->mroute_vif_index) { | |
1051 | /* ignore request for looped MFC entry */ | |
1052 | if (PIM_DEBUG_IGMP_TRACE) { | |
05e451f8 | 1053 | zlog_debug("%s: ignoring request for looped MFC entry (S,G)=%s: igmp_sock=%d oif=%s vif_index=%d", |
12e41d03 | 1054 | __PRETTY_FUNCTION__, |
05e451f8 | 1055 | pim_str_sg_dump (&sg), |
12e41d03 DL |
1056 | source->source_group->group_igmp_sock->fd, |
1057 | source->source_group->group_igmp_sock->interface->name, | |
1058 | input_iface_vif_index); | |
1059 | } | |
1060 | return; | |
1061 | } | |
1062 | ||
05e451f8 | 1063 | source->source_channel_oil = pim_channel_oil_add(&sg, |
12e41d03 DL |
1064 | input_iface_vif_index); |
1065 | if (!source->source_channel_oil) { | |
05e451f8 | 1066 | zlog_warn("%s %s: could not create OIL for channel (S,G)=%s", |
12e41d03 | 1067 | __FILE__, __PRETTY_FUNCTION__, |
05e451f8 | 1068 | pim_str_sg_dump (&sg)); |
12e41d03 DL |
1069 | return; |
1070 | } | |
1071 | } | |
1072 | ||
1865a44a DS |
1073 | result = pim_channel_add_oif(source->source_channel_oil, |
1074 | group->group_igmp_sock->interface, | |
1075 | PIM_OIF_FLAG_PROTO_IGMP); | |
12e41d03 DL |
1076 | if (result) { |
1077 | zlog_warn("%s: add_oif() failed with return=%d", | |
1078 | __func__, result); | |
1079 | return; | |
1080 | } | |
1081 | ||
1082 | /* | |
1083 | Feed IGMPv3-gathered local membership information into PIM | |
1084 | per-interface (S,G) state. | |
1085 | */ | |
69283639 | 1086 | pim_ifchannel_local_membership_add(group->group_igmp_sock->interface, &sg); |
12e41d03 DL |
1087 | |
1088 | IGMP_SOURCE_DO_FORWARDING(source->source_flags); | |
1089 | } | |
1090 | ||
1091 | /* | |
1092 | igmp_source_forward_stop: stop fowarding, but keep the source | |
1093 | igmp_source_delete: stop fowarding, and delete the source | |
1094 | */ | |
1095 | void igmp_source_forward_stop(struct igmp_source *source) | |
1096 | { | |
1097 | struct igmp_group *group; | |
4ed0af70 | 1098 | struct prefix_sg sg; |
12e41d03 DL |
1099 | int result; |
1100 | ||
02e6923e | 1101 | memset (&sg, 0, sizeof (struct prefix_sg)); |
4ed0af70 DS |
1102 | sg.src = source->source_addr; |
1103 | sg.grp = source->source_group->group_addr; | |
1103466b | 1104 | |
12e41d03 | 1105 | if (PIM_DEBUG_IGMP_TRACE) { |
1103466b | 1106 | zlog_debug("%s: (S,G)=%s igmp_sock=%d oif=%s fwd=%d", |
12e41d03 | 1107 | __PRETTY_FUNCTION__, |
1103466b | 1108 | pim_str_sg_dump (&sg), |
12e41d03 DL |
1109 | source->source_group->group_igmp_sock->fd, |
1110 | source->source_group->group_igmp_sock->interface->name, | |
1111 | IGMP_SOURCE_TEST_FORWARDING(source->source_flags)); | |
1112 | } | |
1113 | ||
1114 | /* Prevent IGMP interface from removing multicast route multiple | |
1115 | times */ | |
1116 | if (!IGMP_SOURCE_TEST_FORWARDING(source->source_flags)) { | |
1117 | return; | |
1118 | } | |
1119 | ||
1120 | group = source->source_group; | |
1121 | ||
1122 | /* | |
1123 | It appears that in certain circumstances that | |
1124 | igmp_source_forward_stop is called when IGMP forwarding | |
1125 | was not enabled in oif_flags for this outgoing interface. | |
1126 | Possibly because of multiple calls. When that happens, we | |
1127 | enter the below if statement and this function returns early | |
1128 | which in turn triggers the calling function to assert. | |
1129 | Making the call to del_oif and ignoring the return code | |
1130 | fixes the issue without ill effect, similar to | |
1131 | pim_forward_stop below. | |
1132 | */ | |
1133 | result = del_oif(source->source_channel_oil, | |
1134 | group->group_igmp_sock->interface, | |
1135 | PIM_OIF_FLAG_PROTO_IGMP); | |
1136 | if (result) { | |
1137 | zlog_warn("%s: del_oif() failed with return=%d", | |
1138 | __func__, result); | |
1139 | return; | |
1140 | } | |
1141 | ||
1142 | /* | |
1143 | Feed IGMPv3-gathered local membership information into PIM | |
1144 | per-interface (S,G) state. | |
1145 | */ | |
1146 | pim_ifchannel_local_membership_del(group->group_igmp_sock->interface, | |
1103466b | 1147 | &sg); |
12e41d03 DL |
1148 | |
1149 | IGMP_SOURCE_DONT_FORWARDING(source->source_flags); | |
1150 | } | |
1151 | ||
1152 | void pim_forward_start(struct pim_ifchannel *ch) | |
1153 | { | |
1154 | struct pim_upstream *up = ch->upstream; | |
1155 | ||
1156 | if (PIM_DEBUG_PIM_TRACE) { | |
1157 | char source_str[100]; | |
1158 | char group_str[100]; | |
8f5f5e91 DS |
1159 | char upstream_str[100]; |
1160 | ||
4ed0af70 DS |
1161 | pim_inet4_dump("<source?>", ch->sg.src, source_str, sizeof(source_str)); |
1162 | pim_inet4_dump("<group?>", ch->sg.grp, group_str, sizeof(group_str)); | |
8f5f5e91 DS |
1163 | pim_inet4_dump("<upstream?>", up->upstream_addr, upstream_str, sizeof(upstream_str)); |
1164 | zlog_debug("%s: (S,G)=(%s,%s) oif=%s(%s)", | |
12e41d03 | 1165 | __PRETTY_FUNCTION__, |
8f5f5e91 | 1166 | source_str, group_str, ch->interface->name, upstream_str); |
12e41d03 DL |
1167 | } |
1168 | ||
1169 | if (!up->channel_oil) { | |
8f5f5e91 | 1170 | int input_iface_vif_index = fib_lookup_if_vif_index(up->upstream_addr); |
12e41d03 DL |
1171 | if (input_iface_vif_index < 1) { |
1172 | char source_str[100]; | |
4ed0af70 | 1173 | pim_inet4_dump("<source?>", up->sg.src, source_str, sizeof(source_str)); |
12e41d03 DL |
1174 | zlog_warn("%s %s: could not find input interface for source %s", |
1175 | __FILE__, __PRETTY_FUNCTION__, | |
1176 | source_str); | |
1177 | return; | |
1178 | } | |
1179 | ||
05e451f8 | 1180 | up->channel_oil = pim_channel_oil_add(&up->sg, |
12e41d03 DL |
1181 | input_iface_vif_index); |
1182 | if (!up->channel_oil) { | |
05e451f8 | 1183 | zlog_warn("%s %s: could not create OIL for channel (S,G)=%s", |
12e41d03 | 1184 | __FILE__, __PRETTY_FUNCTION__, |
05e451f8 | 1185 | pim_str_sg_dump (&up->sg)); |
12e41d03 DL |
1186 | return; |
1187 | } | |
1188 | } | |
1189 | ||
1865a44a DS |
1190 | pim_channel_add_oif(up->channel_oil, |
1191 | ch->interface, | |
1192 | PIM_OIF_FLAG_PROTO_PIM); | |
12e41d03 DL |
1193 | } |
1194 | ||
1195 | void pim_forward_stop(struct pim_ifchannel *ch) | |
1196 | { | |
1197 | struct pim_upstream *up = ch->upstream; | |
1198 | ||
1199 | if (PIM_DEBUG_PIM_TRACE) { | |
05e451f8 | 1200 | zlog_debug("%s: (S,G)=%s oif=%s", |
12e41d03 | 1201 | __PRETTY_FUNCTION__, |
05e451f8 | 1202 | pim_str_sg_dump (&ch->sg), ch->interface->name); |
12e41d03 DL |
1203 | } |
1204 | ||
1205 | if (!up->channel_oil) { | |
05e451f8 DS |
1206 | zlog_warn("%s: (S,G)=%s oif=%s missing channel OIL", |
1207 | __PRETTY_FUNCTION__, | |
1208 | pim_str_sg_dump(&ch->sg), ch->interface->name); | |
12e41d03 DL |
1209 | |
1210 | return; | |
1211 | } | |
1212 | ||
1213 | del_oif(up->channel_oil, | |
1214 | ch->interface, | |
1215 | PIM_OIF_FLAG_PROTO_PIM); | |
1216 | } |