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8f5f5e91 DS |
1 | /* |
2 | * PIM for Quagga | |
3 | * Copyright (C) 2015 Cumulus Networks, Inc. | |
4 | * Donald Sharp | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * General Public License for more details. | |
896014f4 DL |
15 | * |
16 | * You should have received a copy of the GNU General Public License along | |
17 | * with this program; see the file COPYING; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
8f5f5e91 DS |
19 | */ |
20 | #include <zebra.h> | |
21 | ||
9bf3c633 | 22 | #include "lib/json.h" |
54b97c74 | 23 | #include "log.h" |
8f5f5e91 | 24 | #include "network.h" |
744d91b3 | 25 | #include "if.h" |
36d6bd7d DS |
26 | #include "linklist.h" |
27 | #include "prefix.h" | |
28 | #include "memory.h" | |
00d07c6f DS |
29 | #include "vty.h" |
30 | #include "vrf.h" | |
dfe43e25 | 31 | #include "plist.h" |
cba44481 | 32 | #include "nexthop.h" |
89b68082 | 33 | #include "table.h" |
3613d898 | 34 | #include "lib_errors.h" |
8f5f5e91 DS |
35 | |
36 | #include "pimd.h" | |
75a26779 | 37 | #include "pim_vty.h" |
54b97c74 | 38 | #include "pim_str.h" |
7176984f | 39 | #include "pim_iface.h" |
8f5f5e91 | 40 | #include "pim_rp.h" |
ed66602c | 41 | #include "pim_rpf.h" |
13afbd05 | 42 | #include "pim_sock.h" |
36d6bd7d | 43 | #include "pim_memory.h" |
e34e07e6 | 44 | #include "pim_neighbor.h" |
7667c556 | 45 | #include "pim_msdp.h" |
1bc98276 | 46 | #include "pim_nht.h" |
28309df0 SP |
47 | #include "pim_mroute.h" |
48 | #include "pim_oil.h" | |
49 | #include "pim_zebra.h" | |
d0e418b4 | 50 | #include "pim_bsm.h" |
c6ced474 | 51 | #include "pim_util.h" |
36d6bd7d | 52 | |
c2cf4b02 DS |
53 | /* Cleanup pim->rpf_hash each node data */ |
54 | void pim_rp_list_hash_clean(void *data) | |
55 | { | |
7c591950 | 56 | struct pim_nexthop_cache *pnc = (struct pim_nexthop_cache *)data; |
c2cf4b02 | 57 | |
6a154c88 | 58 | list_delete(&pnc->rp_list); |
6e1ef388 | 59 | |
7c591950 DS |
60 | hash_clean(pnc->upstream_hash, NULL); |
61 | hash_free(pnc->upstream_hash); | |
62 | pnc->upstream_hash = NULL; | |
1159c202 SP |
63 | if (pnc->nexthop) |
64 | nexthops_free(pnc->nexthop); | |
6e1ef388 DS |
65 | |
66 | XFREE(MTYPE_PIM_NEXTHOP_CACHE, pnc); | |
c2cf4b02 DS |
67 | } |
68 | ||
d62a17ae | 69 | static void pim_rp_info_free(struct rp_info *rp_info) |
36d6bd7d | 70 | { |
0a22ddfb | 71 | XFREE(MTYPE_PIM_FILTER_NAME, rp_info->plist); |
ff823fc9 | 72 | |
d62a17ae | 73 | XFREE(MTYPE_PIM_RP, rp_info); |
36d6bd7d DS |
74 | } |
75 | ||
d62a17ae | 76 | int pim_rp_list_cmp(void *v1, void *v2) |
36d6bd7d | 77 | { |
d62a17ae | 78 | struct rp_info *rp1 = (struct rp_info *)v1; |
79 | struct rp_info *rp2 = (struct rp_info *)v2; | |
80 | ||
81 | /* | |
82 | * Sort by RP IP address | |
83 | */ | |
84 | if (rp1->rp.rpf_addr.u.prefix4.s_addr | |
85 | < rp2->rp.rpf_addr.u.prefix4.s_addr) | |
86 | return -1; | |
87 | ||
88 | if (rp1->rp.rpf_addr.u.prefix4.s_addr | |
89 | > rp2->rp.rpf_addr.u.prefix4.s_addr) | |
90 | return 1; | |
91 | ||
92 | /* | |
93 | * Sort by group IP address | |
94 | */ | |
95 | if (rp1->group.u.prefix4.s_addr < rp2->group.u.prefix4.s_addr) | |
96 | return -1; | |
97 | ||
98 | if (rp1->group.u.prefix4.s_addr > rp2->group.u.prefix4.s_addr) | |
99 | return 1; | |
100 | ||
101 | return 0; | |
36d6bd7d DS |
102 | } |
103 | ||
d9c9a9ee | 104 | void pim_rp_init(struct pim_instance *pim) |
36d6bd7d | 105 | { |
d62a17ae | 106 | struct rp_info *rp_info; |
89b68082 | 107 | struct route_node *rn; |
36d6bd7d | 108 | |
d9c9a9ee DS |
109 | pim->rp_list = list_new(); |
110 | pim->rp_list->del = (void (*)(void *))pim_rp_info_free; | |
111 | pim->rp_list->cmp = pim_rp_list_cmp; | |
36d6bd7d | 112 | |
89b68082 | 113 | pim->rp_table = route_table_init(); |
89b68082 | 114 | |
d62a17ae | 115 | rp_info = XCALLOC(MTYPE_PIM_RP, sizeof(*rp_info)); |
36d6bd7d | 116 | |
c6ced474 | 117 | if (!pim_get_all_mcast_group(&rp_info->group)) { |
450971aa | 118 | flog_err(EC_LIB_DEVELOPMENT, |
1c50c1c0 | 119 | "Unable to convert 224.0.0.0/4 to prefix"); |
6a154c88 | 120 | list_delete(&pim->rp_list); |
89b68082 | 121 | route_table_finish(pim->rp_table); |
2e8345c1 DS |
122 | XFREE(MTYPE_PIM_RP, rp_info); |
123 | return; | |
124 | } | |
d62a17ae | 125 | rp_info->group.family = AF_INET; |
cc144e8b | 126 | pim_addr_to_prefix(&rp_info->rp.rpf_addr, PIMADDR_ANY); |
36d6bd7d | 127 | |
d9c9a9ee | 128 | listnode_add(pim->rp_list, rp_info); |
89b68082 DS |
129 | |
130 | rn = route_node_get(pim->rp_table, &rp_info->group); | |
89b68082 | 131 | rn->info = rp_info; |
23fc858a | 132 | if (PIM_DEBUG_PIM_TRACE) |
996c9314 LB |
133 | zlog_debug( |
134 | "Allocated: %p for rp_info: %p(224.0.0.0/4) Lock: %d", | |
c10e14e9 | 135 | rn, rp_info, route_node_get_lock_count(rn)); |
36d6bd7d DS |
136 | } |
137 | ||
d9c9a9ee | 138 | void pim_rp_free(struct pim_instance *pim) |
36d6bd7d | 139 | { |
e4e52805 DS |
140 | if (pim->rp_table) |
141 | route_table_finish(pim->rp_table); | |
142 | pim->rp_table = NULL; | |
906640db | 143 | |
144 | if (pim->rp_list) | |
145 | list_delete(&pim->rp_list); | |
36d6bd7d DS |
146 | } |
147 | ||
dfe43e25 DW |
148 | /* |
149 | * Given an RP's prefix-list, return the RP's rp_info for that prefix-list | |
150 | */ | |
d9c9a9ee | 151 | static struct rp_info *pim_rp_find_prefix_list(struct pim_instance *pim, |
1db07606 | 152 | pim_addr rp, const char *plist) |
36d6bd7d | 153 | { |
d62a17ae | 154 | struct listnode *node; |
155 | struct rp_info *rp_info; | |
1db07606 MR |
156 | struct prefix rp_prefix; |
157 | ||
158 | pim_addr_to_prefix(&rp_prefix, rp); | |
d62a17ae | 159 | |
d9c9a9ee | 160 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
1db07606 MR |
161 | if (prefix_same(&rp_prefix, &rp_info->rp.rpf_addr) && |
162 | rp_info->plist && strcmp(rp_info->plist, plist) == 0) { | |
d62a17ae | 163 | return rp_info; |
164 | } | |
165 | } | |
166 | ||
167 | return NULL; | |
36d6bd7d DS |
168 | } |
169 | ||
dfe43e25 DW |
170 | /* |
171 | * Return true if plist is used by any rp_info | |
172 | */ | |
d9c9a9ee | 173 | static int pim_rp_prefix_list_used(struct pim_instance *pim, const char *plist) |
dfe43e25 | 174 | { |
d62a17ae | 175 | struct listnode *node; |
176 | struct rp_info *rp_info; | |
177 | ||
d9c9a9ee | 178 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 179 | if (rp_info->plist && strcmp(rp_info->plist, plist) == 0) { |
180 | return 1; | |
181 | } | |
182 | } | |
183 | ||
184 | return 0; | |
dfe43e25 DW |
185 | } |
186 | ||
187 | /* | |
d62a17ae | 188 | * Given an RP's address, return the RP's rp_info that is an exact match for |
189 | * 'group' | |
dfe43e25 | 190 | */ |
d9c9a9ee DS |
191 | static struct rp_info *pim_rp_find_exact(struct pim_instance *pim, |
192 | struct in_addr rp, | |
123214ef | 193 | const struct prefix *group) |
36d6bd7d | 194 | { |
d62a17ae | 195 | struct listnode *node; |
196 | struct rp_info *rp_info; | |
36d6bd7d | 197 | |
d9c9a9ee | 198 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 199 | if (rp.s_addr == rp_info->rp.rpf_addr.u.prefix4.s_addr |
200 | && prefix_same(&rp_info->group, group)) | |
201 | return rp_info; | |
202 | } | |
54b97c74 | 203 | |
d62a17ae | 204 | return NULL; |
36d6bd7d DS |
205 | } |
206 | ||
2b6b16fc DL |
207 | /* |
208 | * XXX: long-term issue: we don't actually have a good "ip address-list" | |
209 | * implementation. ("access-list XYZ" is the closest but honestly it's | |
210 | * kinda garbage.) | |
211 | * | |
212 | * So it's using a prefix-list to match an address here, which causes very | |
213 | * unexpected results for the user since prefix-lists by default only match | |
214 | * when the prefix length is an exact match too. i.e. you'd have to add the | |
215 | * "le 32" and do "ip prefix-list foo permit 10.0.0.0/24 le 32" | |
216 | * | |
217 | * To avoid this pitfall, this code uses "address_mode = true" for the prefix | |
218 | * list match (this is the only user for that.) | |
219 | * | |
220 | * In the long run, we need to add a "ip address-list", but that's a wholly | |
221 | * separate bag of worms, and existing configs using ip prefix-list would | |
222 | * drop into the UX pitfall. | |
223 | */ | |
224 | ||
225 | #include "lib/plist_int.h" | |
226 | ||
dfe43e25 DW |
227 | /* |
228 | * Given a group, return the rp_info for that group | |
229 | */ | |
28309df0 | 230 | struct rp_info *pim_rp_find_match_group(struct pim_instance *pim, |
123214ef | 231 | const struct prefix *group) |
36d6bd7d | 232 | { |
d62a17ae | 233 | struct listnode *node; |
b77b1550 | 234 | struct rp_info *best = NULL; |
d62a17ae | 235 | struct rp_info *rp_info; |
236 | struct prefix_list *plist; | |
2b6b16fc DL |
237 | const struct prefix *bp; |
238 | const struct prefix_list_entry *entry; | |
89b68082 | 239 | struct route_node *rn; |
d62a17ae | 240 | |
4646b86a | 241 | bp = NULL; |
d9c9a9ee | 242 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 243 | if (rp_info->plist) { |
244 | plist = prefix_list_lookup(AFI_IP, rp_info->plist); | |
245 | ||
2b6b16fc DL |
246 | if (prefix_list_apply_ext(plist, &entry, group, true) |
247 | == PREFIX_DENY || !entry) | |
b77b1550 DS |
248 | continue; |
249 | ||
250 | if (!best) { | |
251 | best = rp_info; | |
2b6b16fc | 252 | bp = &entry->prefix; |
b77b1550 DS |
253 | continue; |
254 | } | |
255 | ||
2b6b16fc | 256 | if (bp && bp->prefixlen < entry->prefix.prefixlen) { |
b77b1550 | 257 | best = rp_info; |
2b6b16fc | 258 | bp = &entry->prefix; |
b77b1550 | 259 | } |
d62a17ae | 260 | } |
261 | } | |
262 | ||
89b68082 DS |
263 | rn = route_node_match(pim->rp_table, group); |
264 | if (!rn) { | |
af4c2728 | 265 | flog_err( |
450971aa | 266 | EC_LIB_DEVELOPMENT, |
1d5453d6 | 267 | "%s: BUG We should have found default group information", |
5e81f5dd | 268 | __func__); |
89b68082 DS |
269 | return best; |
270 | } | |
271 | ||
272 | rp_info = rn->info; | |
2dbe669b DA |
273 | if (PIM_DEBUG_PIM_TRACE) |
274 | zlog_debug("Lookedup: %p for rp_info: %p(%pFX) Lock: %d", rn, | |
275 | rp_info, &rp_info->group, | |
c10e14e9 | 276 | route_node_get_lock_count(rn)); |
89b68082 | 277 | |
260c92c8 | 278 | route_unlock_node(rn); |
279 | ||
89b68082 DS |
280 | if (!best) |
281 | return rp_info; | |
282 | ||
283 | if (rp_info->group.prefixlen < best->group.prefixlen) | |
284 | best = rp_info; | |
285 | ||
b77b1550 | 286 | return best; |
36d6bd7d | 287 | } |
75a26779 | 288 | |
dfe43e25 DW |
289 | /* |
290 | * When the user makes "ip pim rp" configuration changes or if they change the | |
291 | * prefix-list(s) used by these statements we must tickle the upstream state | |
292 | * for each group to make them re-lookup who their RP should be. | |
293 | * | |
294 | * This is a placeholder function for now. | |
295 | */ | |
e7016ceb | 296 | void pim_rp_refresh_group_to_rp_mapping(struct pim_instance *pim) |
dfe43e25 | 297 | { |
472ad383 | 298 | pim_msdp_i_am_rp_changed(pim); |
a749b900 | 299 | pim_upstream_reeval_use_rpt(pim); |
dfe43e25 DW |
300 | } |
301 | ||
d9c9a9ee DS |
302 | void pim_rp_prefix_list_update(struct pim_instance *pim, |
303 | struct prefix_list *plist) | |
dfe43e25 | 304 | { |
d62a17ae | 305 | struct listnode *node; |
306 | struct rp_info *rp_info; | |
307 | int refresh_needed = 0; | |
308 | ||
d9c9a9ee | 309 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 310 | if (rp_info->plist |
311 | && strcmp(rp_info->plist, prefix_list_name(plist)) == 0) { | |
312 | refresh_needed = 1; | |
313 | break; | |
314 | } | |
315 | } | |
316 | ||
317 | if (refresh_needed) | |
472ad383 | 318 | pim_rp_refresh_group_to_rp_mapping(pim); |
dfe43e25 DW |
319 | } |
320 | ||
d62a17ae | 321 | static int pim_rp_check_interface_addrs(struct rp_info *rp_info, |
322 | struct pim_interface *pim_ifp) | |
7176984f | 323 | { |
d62a17ae | 324 | struct listnode *node; |
325 | struct pim_secondary_addr *sec_addr; | |
034db86b | 326 | pim_addr rpf_addr; |
7176984f | 327 | |
034db86b DL |
328 | rpf_addr = pim_addr_from_prefix(&rp_info->rp.rpf_addr); |
329 | ||
330 | if (!pim_addr_cmp(pim_ifp->primary_address, rpf_addr)) | |
d62a17ae | 331 | return 1; |
7176984f | 332 | |
d62a17ae | 333 | if (!pim_ifp->sec_addr_list) { |
334 | return 0; | |
335 | } | |
7176984f | 336 | |
d62a17ae | 337 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->sec_addr_list, node, sec_addr)) { |
338 | if (prefix_same(&sec_addr->addr, &rp_info->rp.rpf_addr)) { | |
339 | return 1; | |
340 | } | |
341 | } | |
7176984f | 342 | |
d62a17ae | 343 | return 0; |
7176984f | 344 | } |
345 | ||
fec883d9 DS |
346 | static void pim_rp_check_interfaces(struct pim_instance *pim, |
347 | struct rp_info *rp_info) | |
00d07c6f | 348 | { |
d62a17ae | 349 | struct interface *ifp; |
00d07c6f | 350 | |
d62a17ae | 351 | rp_info->i_am_rp = 0; |
451fda4f | 352 | FOR_ALL_INTERFACES (pim->vrf, ifp) { |
d62a17ae | 353 | struct pim_interface *pim_ifp = ifp->info; |
00d07c6f | 354 | |
d62a17ae | 355 | if (!pim_ifp) |
356 | continue; | |
00d07c6f | 357 | |
d62a17ae | 358 | if (pim_rp_check_interface_addrs(rp_info, pim_ifp)) { |
359 | rp_info->i_am_rp = 1; | |
360 | } | |
361 | } | |
00d07c6f DS |
362 | } |
363 | ||
28309df0 SP |
364 | void pim_upstream_update(struct pim_instance *pim, struct pim_upstream *up) |
365 | { | |
366 | struct pim_rpf old_rpf; | |
367 | enum pim_rpf_result rpf_result; | |
5d99ebea DL |
368 | pim_addr old_upstream_addr; |
369 | pim_addr new_upstream_addr; | |
28309df0 SP |
370 | struct prefix nht_p; |
371 | ||
372 | old_upstream_addr = up->upstream_addr; | |
373 | pim_rp_set_upstream_addr(pim, &new_upstream_addr, up->sg.src, | |
374 | up->sg.grp); | |
375 | ||
23fc858a | 376 | if (PIM_DEBUG_PIM_TRACE) |
ee2bbf7c MS |
377 | zlog_debug("%s: pim upstream update for old upstream %pI4", |
378 | __func__, &old_upstream_addr); | |
28309df0 | 379 | |
5d99ebea | 380 | if (!pim_addr_cmp(old_upstream_addr, new_upstream_addr)) |
28309df0 SP |
381 | return; |
382 | ||
383 | /* Lets consider a case, where a PIM upstream has a better RP as a | |
384 | * result of a new RP configuration with more precise group range. | |
385 | * This upstream has to be added to the upstream hash of new RP's | |
386 | * NHT(pnc) and has to be removed from old RP's NHT upstream hash | |
387 | */ | |
5d99ebea | 388 | if (!pim_addr_is_any(old_upstream_addr)) { |
28309df0 | 389 | /* Deregister addr with Zebra NHT */ |
5d99ebea | 390 | pim_addr_to_prefix(&nht_p, old_upstream_addr); |
2dbe669b | 391 | if (PIM_DEBUG_PIM_TRACE) |
15569c58 | 392 | zlog_debug( |
2dbe669b DA |
393 | "%s: Deregister upstream %s addr %pFX with Zebra NHT", |
394 | __func__, up->sg_str, &nht_p); | |
4efdb9c6 | 395 | pim_delete_tracked_nexthop(pim, &nht_p, up, NULL); |
28309df0 SP |
396 | } |
397 | ||
398 | /* Update the upstream address */ | |
399 | up->upstream_addr = new_upstream_addr; | |
400 | ||
401 | old_rpf.source_nexthop.interface = up->rpf.source_nexthop.interface; | |
402 | ||
8c55c132 | 403 | rpf_result = pim_rpf_update(pim, up, &old_rpf, __func__); |
28309df0 | 404 | if (rpf_result == PIM_RPF_FAILURE) |
15569c58 | 405 | pim_mroute_del(up->channel_oil, __func__); |
28309df0 SP |
406 | |
407 | /* update kernel multicast forwarding cache (MFC) */ | |
7984af18 AK |
408 | if (up->rpf.source_nexthop.interface && up->channel_oil) |
409 | pim_upstream_mroute_iif_update(up->channel_oil, __func__); | |
28309df0 | 410 | |
b36576e4 AK |
411 | if (rpf_result == PIM_RPF_CHANGED || |
412 | (rpf_result == PIM_RPF_FAILURE && | |
413 | old_rpf.source_nexthop.interface)) | |
28309df0 SP |
414 | pim_zebra_upstream_rpf_changed(pim, up, &old_rpf); |
415 | ||
28309df0 SP |
416 | } |
417 | ||
6ed1cea1 | 418 | int pim_rp_new(struct pim_instance *pim, pim_addr rp_addr, struct prefix group, |
cc144e8b | 419 | const char *plist, enum rp_source rp_src_flag) |
d0e418b4 | 420 | { |
421 | int result = 0; | |
d62a17ae | 422 | struct rp_info *rp_info; |
423 | struct rp_info *rp_all; | |
424 | struct prefix group_all; | |
425 | struct listnode *node, *nnode; | |
426 | struct rp_info *tmp_rp_info; | |
427 | char buffer[BUFSIZ]; | |
428 | struct prefix nht_p; | |
89b68082 | 429 | struct route_node *rn; |
28309df0 | 430 | struct pim_upstream *up; |
62596d9a | 431 | bool upstream_updated = false; |
d62a17ae | 432 | |
6ed1cea1 | 433 | if (pim_addr_is_any(rp_addr)) |
1e0d1c25 DS |
434 | return PIM_RP_BAD_ADDRESS; |
435 | ||
d62a17ae | 436 | rp_info = XCALLOC(MTYPE_PIM_RP, sizeof(*rp_info)); |
d62a17ae | 437 | |
6ed1cea1 | 438 | pim_addr_to_prefix(&rp_info->rp.rpf_addr, rp_addr); |
d0e418b4 | 439 | prefix_copy(&rp_info->group, &group); |
440 | rp_info->rp_src = rp_src_flag; | |
d62a17ae | 441 | |
d62a17ae | 442 | if (plist) { |
443 | /* | |
444 | * Return if the prefix-list is already configured for this RP | |
445 | */ | |
1db07606 | 446 | if (pim_rp_find_prefix_list(pim, rp_addr, plist)) { |
d62a17ae | 447 | XFREE(MTYPE_PIM_RP, rp_info); |
448 | return PIM_SUCCESS; | |
449 | } | |
450 | ||
451 | /* | |
452 | * Barf if the prefix-list is already configured for an RP | |
453 | */ | |
d9c9a9ee | 454 | if (pim_rp_prefix_list_used(pim, plist)) { |
d62a17ae | 455 | XFREE(MTYPE_PIM_RP, rp_info); |
456 | return PIM_RP_PFXLIST_IN_USE; | |
457 | } | |
458 | ||
459 | /* | |
460 | * Free any existing rp_info entries for this RP | |
461 | */ | |
d9c9a9ee | 462 | for (ALL_LIST_ELEMENTS(pim->rp_list, node, nnode, |
d62a17ae | 463 | tmp_rp_info)) { |
6ed1cea1 MR |
464 | if (prefix_same(&rp_info->rp.rpf_addr, |
465 | &tmp_rp_info->rp.rpf_addr)) { | |
d62a17ae | 466 | if (tmp_rp_info->plist) |
99384c6e | 467 | pim_rp_del_config(pim, rp_addr, NULL, |
d0e418b4 | 468 | tmp_rp_info->plist); |
d62a17ae | 469 | else |
d0e418b4 | 470 | pim_rp_del_config( |
99384c6e | 471 | pim, rp_addr, |
d62a17ae | 472 | prefix2str(&tmp_rp_info->group, |
473 | buffer, BUFSIZ), | |
474 | NULL); | |
475 | } | |
476 | } | |
477 | ||
478 | rp_info->plist = XSTRDUP(MTYPE_PIM_FILTER_NAME, plist); | |
479 | } else { | |
89b68082 | 480 | |
c6ced474 | 481 | if (!pim_get_all_mcast_group(&group_all)) { |
2e8345c1 DS |
482 | XFREE(MTYPE_PIM_RP, rp_info); |
483 | return PIM_GROUP_BAD_ADDRESS; | |
484 | } | |
d9c9a9ee | 485 | rp_all = pim_rp_find_match_group(pim, &group_all); |
d62a17ae | 486 | |
487 | /* | |
488 | * Barf if group is a non-multicast subnet | |
489 | */ | |
490 | if (!prefix_match(&rp_all->group, &rp_info->group)) { | |
491 | XFREE(MTYPE_PIM_RP, rp_info); | |
492 | return PIM_GROUP_BAD_ADDRESS; | |
493 | } | |
494 | ||
495 | /* | |
496 | * Remove any prefix-list rp_info entries for this RP | |
497 | */ | |
d9c9a9ee | 498 | for (ALL_LIST_ELEMENTS(pim->rp_list, node, nnode, |
d62a17ae | 499 | tmp_rp_info)) { |
6ed1cea1 MR |
500 | if (tmp_rp_info->plist && |
501 | prefix_same(&rp_info->rp.rpf_addr, | |
502 | &tmp_rp_info->rp.rpf_addr)) { | |
99384c6e | 503 | pim_rp_del_config(pim, rp_addr, NULL, |
d0e418b4 | 504 | tmp_rp_info->plist); |
d62a17ae | 505 | } |
506 | } | |
507 | ||
508 | /* | |
b369d0cc | 509 | * Take over the 224.0.0.0/4 group if the rp is INADDR_ANY |
d62a17ae | 510 | */ |
cc144e8b | 511 | if (prefix_same(&rp_all->group, &rp_info->group) && |
512 | pim_rpf_addr_is_inaddr_any(&rp_all->rp)) { | |
d62a17ae | 513 | rp_all->rp.rpf_addr = rp_info->rp.rpf_addr; |
d0e418b4 | 514 | rp_all->rp_src = rp_src_flag; |
d62a17ae | 515 | XFREE(MTYPE_PIM_RP, rp_info); |
516 | ||
517 | /* Register addr with Zebra NHT */ | |
6ed1cea1 | 518 | nht_p = rp_all->rp.rpf_addr; |
2dbe669b | 519 | if (PIM_DEBUG_PIM_NHT_RP) |
d62a17ae | 520 | zlog_debug( |
2dbe669b DA |
521 | "%s: NHT Register rp_all addr %pFX grp %pFX ", |
522 | __func__, &nht_p, &rp_all->group); | |
28309df0 | 523 | |
dd3364cb | 524 | frr_each (rb_pim_upstream, &pim->upstream_head, up) { |
28309df0 SP |
525 | /* Find (*, G) upstream whose RP is not |
526 | * configured yet | |
527 | */ | |
01adb431 | 528 | if (pim_addr_is_any(up->upstream_addr) && |
2a27f13b | 529 | pim_addr_is_any(up->sg.src)) { |
28309df0 SP |
530 | struct prefix grp; |
531 | struct rp_info *trp_info; | |
532 | ||
5d99ebea | 533 | pim_addr_to_prefix(&grp, up->sg.grp); |
d0e418b4 | 534 | trp_info = pim_rp_find_match_group( |
535 | pim, &grp); | |
62596d9a | 536 | if (trp_info == rp_all) { |
28309df0 | 537 | pim_upstream_update(pim, up); |
62596d9a MR |
538 | upstream_updated = true; |
539 | } | |
28309df0 SP |
540 | } |
541 | } | |
62596d9a MR |
542 | if (upstream_updated) |
543 | pim_zebra_update_all_interfaces(pim); | |
28309df0 | 544 | |
5bd51314 DS |
545 | pim_rp_check_interfaces(pim, rp_all); |
546 | pim_rp_refresh_group_to_rp_mapping(pim); | |
43763b11 | 547 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_all, |
4efdb9c6 | 548 | NULL); |
4533b847 | 549 | |
43763b11 DS |
550 | if (!pim_ecmp_nexthop_lookup(pim, |
551 | &rp_all->rp.source_nexthop, | |
552 | &nht_p, &rp_all->group, 1)) | |
553 | return PIM_RP_NO_PATH; | |
d62a17ae | 554 | return PIM_SUCCESS; |
555 | } | |
556 | ||
557 | /* | |
558 | * Return if the group is already configured for this RP | |
559 | */ | |
d0e418b4 | 560 | tmp_rp_info = pim_rp_find_exact( |
561 | pim, rp_info->rp.rpf_addr.u.prefix4, &rp_info->group); | |
562 | if (tmp_rp_info) { | |
563 | if ((tmp_rp_info->rp_src != rp_src_flag) | |
564 | && (rp_src_flag == RP_SRC_STATIC)) | |
565 | tmp_rp_info->rp_src = rp_src_flag; | |
d62a17ae | 566 | XFREE(MTYPE_PIM_RP, rp_info); |
d0e418b4 | 567 | return result; |
d62a17ae | 568 | } |
569 | ||
570 | /* | |
571 | * Barf if this group is already covered by some other RP | |
572 | */ | |
d9c9a9ee | 573 | tmp_rp_info = pim_rp_find_match_group(pim, &rp_info->group); |
d62a17ae | 574 | |
575 | if (tmp_rp_info) { | |
576 | if (tmp_rp_info->plist) { | |
577 | XFREE(MTYPE_PIM_RP, rp_info); | |
578 | return PIM_GROUP_PFXLIST_OVERLAP; | |
579 | } else { | |
580 | /* | |
581 | * If the only RP that covers this group is an | |
582 | * RP configured for | |
583 | * 224.0.0.0/4 that is fine, ignore that one. | |
584 | * For all others | |
585 | * though we must return PIM_GROUP_OVERLAP | |
586 | */ | |
89b68082 DS |
587 | if (prefix_same(&rp_info->group, |
588 | &tmp_rp_info->group)) { | |
d0e418b4 | 589 | if ((rp_src_flag == RP_SRC_STATIC) |
590 | && (tmp_rp_info->rp_src | |
591 | == RP_SRC_STATIC)) { | |
592 | XFREE(MTYPE_PIM_RP, rp_info); | |
593 | return PIM_GROUP_OVERLAP; | |
594 | } | |
595 | ||
596 | result = pim_rp_change( | |
49b7b2c4 | 597 | pim, rp_addr, |
d0e418b4 | 598 | tmp_rp_info->group, |
599 | rp_src_flag); | |
d62a17ae | 600 | XFREE(MTYPE_PIM_RP, rp_info); |
d0e418b4 | 601 | return result; |
d62a17ae | 602 | } |
603 | } | |
604 | } | |
605 | } | |
606 | ||
d9c9a9ee | 607 | listnode_add_sort(pim->rp_list, rp_info); |
89b68082 | 608 | rn = route_node_get(pim->rp_table, &rp_info->group); |
89b68082 DS |
609 | rn->info = rp_info; |
610 | ||
2dbe669b DA |
611 | if (PIM_DEBUG_PIM_TRACE) |
612 | zlog_debug("Allocated: %p for rp_info: %p(%pFX) Lock: %d", rn, | |
613 | rp_info, &rp_info->group, | |
c10e14e9 | 614 | route_node_get_lock_count(rn)); |
d62a17ae | 615 | |
dd3364cb | 616 | frr_each (rb_pim_upstream, &pim->upstream_head, up) { |
2a27f13b | 617 | if (pim_addr_is_any(up->sg.src)) { |
28309df0 SP |
618 | struct prefix grp; |
619 | struct rp_info *trp_info; | |
620 | ||
5d99ebea | 621 | pim_addr_to_prefix(&grp, up->sg.grp); |
28309df0 SP |
622 | trp_info = pim_rp_find_match_group(pim, &grp); |
623 | ||
62596d9a | 624 | if (trp_info == rp_info) { |
28309df0 | 625 | pim_upstream_update(pim, up); |
62596d9a MR |
626 | upstream_updated = true; |
627 | } | |
28309df0 SP |
628 | } |
629 | } | |
630 | ||
62596d9a MR |
631 | if (upstream_updated) |
632 | pim_zebra_update_all_interfaces(pim); | |
633 | ||
5bd51314 DS |
634 | pim_rp_check_interfaces(pim, rp_info); |
635 | pim_rp_refresh_group_to_rp_mapping(pim); | |
636 | ||
d62a17ae | 637 | /* Register addr with Zebra NHT */ |
6ed1cea1 | 638 | nht_p = rp_info->rp.rpf_addr; |
2dbe669b DA |
639 | if (PIM_DEBUG_PIM_NHT_RP) |
640 | zlog_debug("%s: NHT Register RP addr %pFX grp %pFX with Zebra ", | |
641 | __func__, &nht_p, &rp_info->group); | |
4efdb9c6 | 642 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, NULL); |
43763b11 DS |
643 | if (!pim_ecmp_nexthop_lookup(pim, &rp_info->rp.source_nexthop, &nht_p, |
644 | &rp_info->group, 1)) | |
645 | return PIM_RP_NO_PATH; | |
d62a17ae | 646 | |
d62a17ae | 647 | return PIM_SUCCESS; |
75a26779 DS |
648 | } |
649 | ||
99384c6e MR |
650 | void pim_rp_del_config(struct pim_instance *pim, pim_addr rp_addr, |
651 | const char *group_range, const char *plist) | |
75a26779 | 652 | { |
d62a17ae | 653 | struct prefix group; |
d62a17ae | 654 | int result; |
d62a17ae | 655 | |
656 | if (group_range == NULL) | |
c6ced474 | 657 | result = pim_get_all_mcast_group(&group); |
d62a17ae | 658 | else |
659 | result = str2prefix(group_range, &group); | |
660 | ||
99384c6e MR |
661 | if (!result) { |
662 | if (PIM_DEBUG_PIM_TRACE) | |
663 | zlog_debug( | |
664 | "%s: String to prefix failed for %pPAs group", | |
665 | __func__, &rp_addr); | |
666 | return; | |
667 | } | |
d62a17ae | 668 | |
99384c6e | 669 | pim_rp_del(pim, rp_addr, group, plist, RP_SRC_STATIC); |
d0e418b4 | 670 | } |
671 | ||
672 | int pim_rp_del(struct pim_instance *pim, struct in_addr rp_addr, | |
673 | struct prefix group, const char *plist, | |
674 | enum rp_source rp_src_flag) | |
675 | { | |
676 | struct prefix g_all; | |
677 | struct rp_info *rp_info; | |
678 | struct rp_info *rp_all; | |
679 | struct prefix nht_p; | |
680 | struct route_node *rn; | |
681 | bool was_plist = false; | |
682 | struct rp_info *trp_info; | |
683 | struct pim_upstream *up; | |
d0e418b4 | 684 | struct bsgrp_node *bsgrp = NULL; |
685 | struct bsm_rpinfo *bsrp = NULL; | |
d0e418b4 | 686 | char rp_str[INET_ADDRSTRLEN]; |
62596d9a | 687 | bool upstream_updated = false; |
d0e418b4 | 688 | |
689 | if (!inet_ntop(AF_INET, &rp_addr, rp_str, sizeof(rp_str))) | |
772270f3 | 690 | snprintf(rp_str, sizeof(rp_str), "<rp?>"); |
d0e418b4 | 691 | |
d62a17ae | 692 | if (plist) |
d9c9a9ee | 693 | rp_info = pim_rp_find_prefix_list(pim, rp_addr, plist); |
d62a17ae | 694 | else |
d9c9a9ee | 695 | rp_info = pim_rp_find_exact(pim, rp_addr, &group); |
d62a17ae | 696 | |
697 | if (!rp_info) | |
698 | return PIM_RP_NOT_FOUND; | |
699 | ||
700 | if (rp_info->plist) { | |
701 | XFREE(MTYPE_PIM_FILTER_NAME, rp_info->plist); | |
89b68082 | 702 | was_plist = true; |
d62a17ae | 703 | } |
704 | ||
23fc858a | 705 | if (PIM_DEBUG_PIM_TRACE) |
2dbe669b DA |
706 | zlog_debug("%s: Delete RP %s for the group %pFX", __func__, |
707 | rp_str, &group); | |
d0e418b4 | 708 | |
709 | /* While static RP is getting deleted, we need to check if dynamic RP | |
710 | * present for the same group in BSM RP table, then install the dynamic | |
711 | * RP for the group node into the main rp table | |
712 | */ | |
713 | if (rp_src_flag == RP_SRC_STATIC) { | |
714 | bsgrp = pim_bsm_get_bsgrp_node(&pim->global_scope, &group); | |
715 | ||
716 | if (bsgrp) { | |
fdab2940 | 717 | bsrp = bsm_rpinfos_first(bsgrp->bsrp_list); |
d0e418b4 | 718 | if (bsrp) { |
23fc858a | 719 | if (PIM_DEBUG_PIM_TRACE) { |
d0e418b4 | 720 | char bsrp_str[INET_ADDRSTRLEN]; |
721 | ||
722 | if (!inet_ntop(AF_INET, bsrp, bsrp_str, | |
723 | sizeof(bsrp_str))) | |
772270f3 QY |
724 | snprintf(bsrp_str, |
725 | sizeof(bsrp_str), | |
726 | "<bsrp?>"); | |
d0e418b4 | 727 | |
15569c58 | 728 | zlog_debug( |
2dbe669b DA |
729 | "%s: BSM RP %s found for the group %pFX", |
730 | __func__, bsrp_str, &group); | |
d0e418b4 | 731 | } |
732 | return pim_rp_change(pim, bsrp->rp_address, | |
733 | group, RP_SRC_BSR); | |
734 | } | |
735 | } else { | |
23fc858a | 736 | if (PIM_DEBUG_PIM_TRACE) |
d0e418b4 | 737 | zlog_debug( |
2dbe669b DA |
738 | "%s: BSM RP not found for the group %pFX", |
739 | __func__, &group); | |
d0e418b4 | 740 | } |
741 | } | |
742 | ||
d62a17ae | 743 | /* Deregister addr with Zebra NHT */ |
744 | nht_p.family = AF_INET; | |
745 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
746 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
2dbe669b DA |
747 | if (PIM_DEBUG_PIM_NHT_RP) |
748 | zlog_debug("%s: Deregister RP addr %pFX with Zebra ", __func__, | |
749 | &nht_p); | |
4efdb9c6 | 750 | pim_delete_tracked_nexthop(pim, &nht_p, NULL, rp_info); |
d62a17ae | 751 | |
c6ced474 | 752 | if (!pim_get_all_mcast_group(&g_all)) |
e691f179 DS |
753 | return PIM_RP_BAD_ADDRESS; |
754 | ||
d9c9a9ee | 755 | rp_all = pim_rp_find_match_group(pim, &g_all); |
d62a17ae | 756 | |
757 | if (rp_all == rp_info) { | |
dd3364cb | 758 | frr_each (rb_pim_upstream, &pim->upstream_head, up) { |
8cfd7268 SP |
759 | /* Find the upstream (*, G) whose upstream address is |
760 | * same as the deleted RP | |
761 | */ | |
01adb431 DL |
762 | pim_addr rpf_addr; |
763 | ||
764 | rpf_addr = pim_addr_from_prefix(&rp_info->rp.rpf_addr); | |
765 | if (!pim_addr_cmp(up->upstream_addr, rpf_addr) && | |
2a27f13b | 766 | pim_addr_is_any(up->sg.src)) { |
8cfd7268 | 767 | struct prefix grp; |
5d99ebea DL |
768 | |
769 | pim_addr_to_prefix(&grp, up->sg.grp); | |
8cfd7268 SP |
770 | trp_info = pim_rp_find_match_group(pim, &grp); |
771 | if (trp_info == rp_all) { | |
772 | pim_upstream_rpf_clear(pim, up); | |
01adb431 | 773 | up->upstream_addr = PIMADDR_ANY; |
8cfd7268 SP |
774 | } |
775 | } | |
776 | } | |
cc144e8b | 777 | pim_addr_to_prefix(&rp_all->rp.rpf_addr, PIMADDR_ANY); |
d62a17ae | 778 | rp_all->i_am_rp = 0; |
779 | return PIM_SUCCESS; | |
780 | } | |
781 | ||
d9c9a9ee | 782 | listnode_delete(pim->rp_list, rp_info); |
89b68082 DS |
783 | |
784 | if (!was_plist) { | |
785 | rn = route_node_get(pim->rp_table, &rp_info->group); | |
786 | if (rn) { | |
787 | if (rn->info != rp_info) | |
af4c2728 | 788 | flog_err( |
450971aa | 789 | EC_LIB_DEVELOPMENT, |
3613d898 | 790 | "Expected rn->info to be equal to rp_info"); |
89b68082 | 791 | |
2dbe669b | 792 | if (PIM_DEBUG_PIM_TRACE) |
996c9314 | 793 | zlog_debug( |
2dbe669b DA |
794 | "%s:Found for Freeing: %p for rp_info: %p(%pFX) Lock: %d", |
795 | __func__, rn, rp_info, &rp_info->group, | |
c10e14e9 | 796 | route_node_get_lock_count(rn)); |
2dbe669b | 797 | |
89b68082 DS |
798 | rn->info = NULL; |
799 | route_unlock_node(rn); | |
800 | route_unlock_node(rn); | |
801 | } | |
802 | } | |
803 | ||
472ad383 | 804 | pim_rp_refresh_group_to_rp_mapping(pim); |
093c928f | 805 | |
dd3364cb | 806 | frr_each (rb_pim_upstream, &pim->upstream_head, up) { |
8cfd7268 SP |
807 | /* Find the upstream (*, G) whose upstream address is same as |
808 | * the deleted RP | |
809 | */ | |
01adb431 DL |
810 | pim_addr rpf_addr; |
811 | ||
812 | rpf_addr = pim_addr_from_prefix(&rp_info->rp.rpf_addr); | |
813 | if (!pim_addr_cmp(up->upstream_addr, rpf_addr) && | |
2a27f13b | 814 | pim_addr_is_any(up->sg.src)) { |
8cfd7268 SP |
815 | struct prefix grp; |
816 | ||
5d99ebea | 817 | pim_addr_to_prefix(&grp, up->sg.grp); |
8cfd7268 SP |
818 | trp_info = pim_rp_find_match_group(pim, &grp); |
819 | ||
820 | /* RP not found for the group grp */ | |
cc144e8b | 821 | if (pim_rpf_addr_is_inaddr_any(&trp_info->rp)) { |
8cfd7268 | 822 | pim_upstream_rpf_clear(pim, up); |
d0e418b4 | 823 | pim_rp_set_upstream_addr( |
824 | pim, &up->upstream_addr, up->sg.src, | |
825 | up->sg.grp); | |
8cfd7268 SP |
826 | } |
827 | ||
828 | /* RP found for the group grp */ | |
62596d9a | 829 | else { |
8cfd7268 | 830 | pim_upstream_update(pim, up); |
62596d9a MR |
831 | upstream_updated = true; |
832 | } | |
8cfd7268 SP |
833 | } |
834 | } | |
835 | ||
62596d9a MR |
836 | if (upstream_updated) |
837 | pim_zebra_update_all_interfaces(pim); | |
838 | ||
093c928f | 839 | XFREE(MTYPE_PIM_RP, rp_info); |
d62a17ae | 840 | return PIM_SUCCESS; |
75a26779 | 841 | } |
13afbd05 | 842 | |
49b7b2c4 | 843 | int pim_rp_change(struct pim_instance *pim, pim_addr new_rp_addr, |
d0e418b4 | 844 | struct prefix group, enum rp_source rp_src_flag) |
845 | { | |
846 | struct prefix nht_p; | |
847 | struct route_node *rn; | |
848 | int result = 0; | |
849 | struct rp_info *rp_info = NULL; | |
850 | struct pim_upstream *up; | |
62596d9a | 851 | bool upstream_updated = false; |
49b7b2c4 | 852 | pim_addr old_rp_addr; |
d0e418b4 | 853 | |
854 | rn = route_node_lookup(pim->rp_table, &group); | |
855 | if (!rn) { | |
856 | result = pim_rp_new(pim, new_rp_addr, group, NULL, rp_src_flag); | |
857 | return result; | |
858 | } | |
859 | ||
860 | rp_info = rn->info; | |
861 | ||
862 | if (!rp_info) { | |
863 | route_unlock_node(rn); | |
864 | result = pim_rp_new(pim, new_rp_addr, group, NULL, rp_src_flag); | |
865 | return result; | |
866 | } | |
867 | ||
49b7b2c4 MR |
868 | old_rp_addr = pim_addr_from_prefix(&rp_info->rp.rpf_addr); |
869 | if (!pim_addr_cmp(new_rp_addr, old_rp_addr)) { | |
d0e418b4 | 870 | if (rp_info->rp_src != rp_src_flag) { |
871 | rp_info->rp_src = rp_src_flag; | |
872 | route_unlock_node(rn); | |
873 | return PIM_SUCCESS; | |
874 | } | |
875 | } | |
876 | ||
49b7b2c4 MR |
877 | nht_p.family = PIM_AF; |
878 | nht_p.prefixlen = PIM_MAX_BITLEN; | |
35a30302 | 879 | |
d0e418b4 | 880 | /* Deregister old RP addr with Zebra NHT */ |
49b7b2c4 MR |
881 | |
882 | if (!pim_addr_is_any(old_rp_addr)) { | |
883 | nht_p = rp_info->rp.rpf_addr; | |
2dbe669b DA |
884 | if (PIM_DEBUG_PIM_NHT_RP) |
885 | zlog_debug("%s: Deregister RP addr %pFX with Zebra ", | |
886 | __func__, &nht_p); | |
4efdb9c6 | 887 | pim_delete_tracked_nexthop(pim, &nht_p, NULL, rp_info); |
d0e418b4 | 888 | } |
889 | ||
890 | pim_rp_nexthop_del(rp_info); | |
891 | listnode_delete(pim->rp_list, rp_info); | |
892 | /* Update the new RP address*/ | |
49b7b2c4 MR |
893 | |
894 | pim_addr_to_prefix(&rp_info->rp.rpf_addr, new_rp_addr); | |
d0e418b4 | 895 | rp_info->rp_src = rp_src_flag; |
896 | rp_info->i_am_rp = 0; | |
897 | ||
898 | listnode_add_sort(pim->rp_list, rp_info); | |
899 | ||
dd3364cb | 900 | frr_each (rb_pim_upstream, &pim->upstream_head, up) { |
2a27f13b | 901 | if (pim_addr_is_any(up->sg.src)) { |
d0e418b4 | 902 | struct prefix grp; |
903 | struct rp_info *trp_info; | |
904 | ||
5d99ebea | 905 | pim_addr_to_prefix(&grp, up->sg.grp); |
d0e418b4 | 906 | trp_info = pim_rp_find_match_group(pim, &grp); |
907 | ||
62596d9a | 908 | if (trp_info == rp_info) { |
d0e418b4 | 909 | pim_upstream_update(pim, up); |
62596d9a MR |
910 | upstream_updated = true; |
911 | } | |
d0e418b4 | 912 | } |
913 | } | |
914 | ||
62596d9a MR |
915 | if (upstream_updated) |
916 | pim_zebra_update_all_interfaces(pim); | |
917 | ||
d0e418b4 | 918 | /* Register new RP addr with Zebra NHT */ |
49b7b2c4 | 919 | nht_p = rp_info->rp.rpf_addr; |
2dbe669b DA |
920 | if (PIM_DEBUG_PIM_NHT_RP) |
921 | zlog_debug("%s: NHT Register RP addr %pFX grp %pFX with Zebra ", | |
922 | __func__, &nht_p, &rp_info->group); | |
d0e418b4 | 923 | |
4efdb9c6 | 924 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, NULL); |
d0e418b4 | 925 | if (!pim_ecmp_nexthop_lookup(pim, &rp_info->rp.source_nexthop, &nht_p, |
926 | &rp_info->group, 1)) { | |
927 | route_unlock_node(rn); | |
928 | return PIM_RP_NO_PATH; | |
929 | } | |
930 | ||
931 | pim_rp_check_interfaces(pim, rp_info); | |
932 | ||
933 | route_unlock_node(rn); | |
934 | ||
935 | pim_rp_refresh_group_to_rp_mapping(pim); | |
936 | ||
937 | return result; | |
938 | } | |
939 | ||
fec883d9 | 940 | void pim_rp_setup(struct pim_instance *pim) |
13afbd05 | 941 | { |
d62a17ae | 942 | struct listnode *node; |
943 | struct rp_info *rp_info; | |
d62a17ae | 944 | struct prefix nht_p; |
d62a17ae | 945 | |
d9c9a9ee | 946 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
cc144e8b | 947 | if (pim_rpf_addr_is_inaddr_any(&rp_info->rp)) |
d62a17ae | 948 | continue; |
949 | ||
950 | nht_p.family = AF_INET; | |
951 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
952 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
8cfd7268 | 953 | |
4efdb9c6 | 954 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, NULL); |
43763b11 DS |
955 | if (!pim_ecmp_nexthop_lookup(pim, &rp_info->rp.source_nexthop, |
956 | &nht_p, &rp_info->group, 1)) | |
957 | if (PIM_DEBUG_PIM_NHT_RP) | |
d62a17ae | 958 | zlog_debug( |
43763b11 | 959 | "Unable to lookup nexthop for rp specified"); |
d62a17ae | 960 | } |
13afbd05 DS |
961 | } |
962 | ||
54b97c74 | 963 | /* |
7176984f | 964 | * Checks to see if we should elect ourself the actual RP when new if |
965 | * addresses are added against an interface. | |
54b97c74 | 966 | */ |
d62a17ae | 967 | void pim_rp_check_on_if_add(struct pim_interface *pim_ifp) |
54b97c74 | 968 | { |
d62a17ae | 969 | struct listnode *node; |
970 | struct rp_info *rp_info; | |
971 | bool i_am_rp_changed = false; | |
d9c9a9ee | 972 | struct pim_instance *pim = pim_ifp->pim; |
d62a17ae | 973 | |
d9c9a9ee | 974 | if (pim->rp_list == NULL) |
d62a17ae | 975 | return; |
976 | ||
d9c9a9ee | 977 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
cc144e8b | 978 | if (pim_rpf_addr_is_inaddr_any(&rp_info->rp)) |
d62a17ae | 979 | continue; |
980 | ||
981 | /* if i_am_rp is already set nothing to be done (adding new | |
982 | * addresses | |
983 | * is not going to make a difference). */ | |
984 | if (rp_info->i_am_rp) { | |
985 | continue; | |
986 | } | |
987 | ||
988 | if (pim_rp_check_interface_addrs(rp_info, pim_ifp)) { | |
989 | i_am_rp_changed = true; | |
990 | rp_info->i_am_rp = 1; | |
3d225d48 | 991 | if (PIM_DEBUG_PIM_NHT_RP) { |
d62a17ae | 992 | char rp[PREFIX_STRLEN]; |
993 | pim_addr_dump("<rp?>", &rp_info->rp.rpf_addr, | |
994 | rp, sizeof(rp)); | |
995 | zlog_debug("%s: %s: i am rp", __func__, rp); | |
996 | } | |
997 | } | |
998 | } | |
999 | ||
1000 | if (i_am_rp_changed) { | |
472ad383 | 1001 | pim_msdp_i_am_rp_changed(pim); |
a749b900 | 1002 | pim_upstream_reeval_use_rpt(pim); |
d62a17ae | 1003 | } |
7176984f | 1004 | } |
36d6bd7d | 1005 | |
7176984f | 1006 | /* up-optimized re-evaluation of "i_am_rp". this is used when ifaddresses |
1007 | * are removed. Removing numbers is an uncommon event in an active network | |
1008 | * so I have made no attempt to optimize it. */ | |
fec883d9 | 1009 | void pim_i_am_rp_re_evaluate(struct pim_instance *pim) |
7176984f | 1010 | { |
d62a17ae | 1011 | struct listnode *node; |
1012 | struct rp_info *rp_info; | |
1013 | bool i_am_rp_changed = false; | |
1014 | int old_i_am_rp; | |
1015 | ||
d9c9a9ee | 1016 | if (pim->rp_list == NULL) |
d62a17ae | 1017 | return; |
1018 | ||
d9c9a9ee | 1019 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
cc144e8b | 1020 | if (pim_rpf_addr_is_inaddr_any(&rp_info->rp)) |
d62a17ae | 1021 | continue; |
1022 | ||
1023 | old_i_am_rp = rp_info->i_am_rp; | |
fec883d9 | 1024 | pim_rp_check_interfaces(pim, rp_info); |
d62a17ae | 1025 | |
1026 | if (old_i_am_rp != rp_info->i_am_rp) { | |
1027 | i_am_rp_changed = true; | |
3d225d48 | 1028 | if (PIM_DEBUG_PIM_NHT_RP) { |
d62a17ae | 1029 | char rp[PREFIX_STRLEN]; |
1030 | pim_addr_dump("<rp?>", &rp_info->rp.rpf_addr, | |
1031 | rp, sizeof(rp)); | |
1032 | if (rp_info->i_am_rp) { | |
1033 | zlog_debug("%s: %s: i am rp", __func__, | |
1034 | rp); | |
1035 | } else { | |
1036 | zlog_debug("%s: %s: i am no longer rp", | |
1037 | __func__, rp); | |
1038 | } | |
1039 | } | |
1040 | } | |
1041 | } | |
1042 | ||
1043 | if (i_am_rp_changed) { | |
472ad383 | 1044 | pim_msdp_i_am_rp_changed(pim); |
a749b900 | 1045 | pim_upstream_reeval_use_rpt(pim); |
d62a17ae | 1046 | } |
54b97c74 DS |
1047 | } |
1048 | ||
1049 | /* | |
1050 | * I_am_RP(G) is true if the group-to-RP mapping indicates that | |
1051 | * this router is the RP for the group. | |
1052 | * | |
1053 | * Since we only have static RP, all groups are part of this RP | |
1054 | */ | |
5d99ebea | 1055 | int pim_rp_i_am_rp(struct pim_instance *pim, pim_addr group) |
54b97c74 | 1056 | { |
d62a17ae | 1057 | struct prefix g; |
1058 | struct rp_info *rp_info; | |
36d6bd7d | 1059 | |
d62a17ae | 1060 | memset(&g, 0, sizeof(g)); |
131ded08 | 1061 | pim_addr_to_prefix(&g, group); |
d9c9a9ee | 1062 | rp_info = pim_rp_find_match_group(pim, &g); |
36d6bd7d | 1063 | |
d62a17ae | 1064 | if (rp_info) |
1065 | return rp_info->i_am_rp; | |
d62a17ae | 1066 | return 0; |
54b97c74 DS |
1067 | } |
1068 | ||
71694057 DS |
1069 | /* |
1070 | * RP(G) | |
1071 | * | |
1072 | * Return the RP that the Group belongs too. | |
1073 | */ | |
5d99ebea | 1074 | struct pim_rpf *pim_rp_g(struct pim_instance *pim, pim_addr group) |
71694057 | 1075 | { |
d62a17ae | 1076 | struct prefix g; |
1077 | struct rp_info *rp_info; | |
1078 | ||
1079 | memset(&g, 0, sizeof(g)); | |
8eb5ad6c | 1080 | pim_addr_to_prefix(&g, group); |
d62a17ae | 1081 | |
d9c9a9ee | 1082 | rp_info = pim_rp_find_match_group(pim, &g); |
d62a17ae | 1083 | |
1084 | if (rp_info) { | |
1085 | struct prefix nht_p; | |
43763b11 | 1086 | |
d62a17ae | 1087 | /* Register addr with Zebra NHT */ |
8eb5ad6c | 1088 | nht_p = rp_info->rp.rpf_addr; |
2dbe669b | 1089 | if (PIM_DEBUG_PIM_NHT_RP) |
d62a17ae | 1090 | zlog_debug( |
2dbe669b DA |
1091 | "%s: NHT Register RP addr %pFX grp %pFX with Zebra", |
1092 | __func__, &nht_p, &rp_info->group); | |
4efdb9c6 | 1093 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, NULL); |
43763b11 DS |
1094 | pim_rpf_set_refresh_time(pim); |
1095 | (void)pim_ecmp_nexthop_lookup(pim, &rp_info->rp.source_nexthop, | |
1096 | &nht_p, &rp_info->group, 1); | |
d62a17ae | 1097 | return (&rp_info->rp); |
1098 | } | |
1099 | ||
1100 | // About to Go Down | |
1101 | return NULL; | |
71694057 DS |
1102 | } |
1103 | ||
8f5f5e91 DS |
1104 | /* |
1105 | * Set the upstream IP address we want to talk to based upon | |
1106 | * the rp configured and the source address | |
1107 | * | |
1108 | * If we have don't have a RP configured and the source address is * | |
732c209c | 1109 | * then set the upstream addr as INADDR_ANY and return failure. |
8f5f5e91 DS |
1110 | * |
1111 | */ | |
5d99ebea DL |
1112 | int pim_rp_set_upstream_addr(struct pim_instance *pim, pim_addr *up, |
1113 | pim_addr source, pim_addr group) | |
8f5f5e91 | 1114 | { |
d62a17ae | 1115 | struct rp_info *rp_info; |
1116 | struct prefix g; | |
36d6bd7d | 1117 | |
d62a17ae | 1118 | memset(&g, 0, sizeof(g)); |
b1e132ac MR |
1119 | |
1120 | pim_addr_to_prefix(&g, group); | |
36d6bd7d | 1121 | |
d9c9a9ee | 1122 | rp_info = pim_rp_find_match_group(pim, &g); |
36d6bd7d | 1123 | |
cc144e8b | 1124 | if (!rp_info || ((pim_rpf_addr_is_inaddr_any(&rp_info->rp)) && |
b1e132ac | 1125 | (pim_addr_is_any(source)))) { |
3d225d48 | 1126 | if (PIM_DEBUG_PIM_NHT_RP) |
d62a17ae | 1127 | zlog_debug("%s: Received a (*,G) with no RP configured", |
15569c58 | 1128 | __func__); |
b1e132ac | 1129 | *up = PIMADDR_ANY; |
d62a17ae | 1130 | return 0; |
1131 | } | |
8f5f5e91 | 1132 | |
b1e132ac MR |
1133 | if (pim_addr_is_any(source)) |
1134 | *up = pim_addr_from_prefix(&rp_info->rp.rpf_addr); | |
1135 | else | |
1136 | *up = source; | |
8f5f5e91 | 1137 | |
d62a17ae | 1138 | return 1; |
8f5f5e91 | 1139 | } |
75a26779 | 1140 | |
0c8b717e DS |
1141 | int pim_rp_config_write(struct pim_instance *pim, struct vty *vty, |
1142 | const char *spaces) | |
75a26779 | 1143 | { |
d62a17ae | 1144 | struct listnode *node; |
1145 | struct rp_info *rp_info; | |
d62a17ae | 1146 | int count = 0; |
0c3182a0 | 1147 | pim_addr rp_addr; |
d62a17ae | 1148 | |
d9c9a9ee | 1149 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
cc144e8b | 1150 | if (pim_rpf_addr_is_inaddr_any(&rp_info->rp)) |
d62a17ae | 1151 | continue; |
1152 | ||
d0e418b4 | 1153 | if (rp_info->rp_src == RP_SRC_BSR) |
1154 | continue; | |
1155 | ||
0c3182a0 | 1156 | rp_addr = pim_addr_from_prefix(&rp_info->rp.rpf_addr); |
d62a17ae | 1157 | if (rp_info->plist) |
0c3182a0 MR |
1158 | vty_out(vty, |
1159 | "%s" PIM_AF_NAME | |
1160 | " pim rp %pPA prefix-list %s\n", | |
1161 | spaces, &rp_addr, rp_info->plist); | |
d62a17ae | 1162 | else |
0c3182a0 MR |
1163 | vty_out(vty, "%s" PIM_AF_NAME " pim rp %pPA %pFX\n", |
1164 | spaces, &rp_addr, &rp_info->group); | |
d62a17ae | 1165 | count++; |
1166 | } | |
1167 | ||
1168 | return count; | |
75a26779 DS |
1169 | } |
1170 | ||
088f1098 | 1171 | void pim_rp_show_information(struct pim_instance *pim, struct vty *vty, bool uj) |
00d07c6f | 1172 | { |
d62a17ae | 1173 | struct rp_info *rp_info; |
1174 | struct rp_info *prev_rp_info = NULL; | |
1175 | struct listnode *node; | |
025725f7 | 1176 | char source[7]; |
ee2bbf7c | 1177 | char buf[PREFIX_STRLEN]; |
d62a17ae | 1178 | |
1179 | json_object *json = NULL; | |
1180 | json_object *json_rp_rows = NULL; | |
1181 | json_object *json_row = NULL; | |
1182 | ||
1183 | if (uj) | |
1184 | json = json_object_new_object(); | |
1185 | else | |
1186 | vty_out(vty, | |
d6593fc5 | 1187 | "RP address group/prefix-list OIF I am RP Source\n"); |
d9c9a9ee | 1188 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
cc144e8b | 1189 | if (!pim_rpf_addr_is_inaddr_any(&rp_info->rp)) { |
d62a17ae | 1190 | char buf[48]; |
1191 | ||
025725f7 | 1192 | if (rp_info->rp_src == RP_SRC_STATIC) |
96e43299 | 1193 | strlcpy(source, "Static", sizeof(source)); |
025725f7 | 1194 | else if (rp_info->rp_src == RP_SRC_BSR) |
96e43299 | 1195 | strlcpy(source, "BSR", sizeof(source)); |
025725f7 | 1196 | else |
96e43299 | 1197 | strlcpy(source, "None", sizeof(source)); |
d62a17ae | 1198 | if (uj) { |
1199 | /* | |
1200 | * If we have moved on to a new RP then add the | |
1201 | * entry for the previous RP | |
1202 | */ | |
1203 | if (prev_rp_info | |
1204 | && prev_rp_info->rp.rpf_addr.u.prefix4 | |
1205 | .s_addr | |
1206 | != rp_info->rp.rpf_addr.u.prefix4 | |
1207 | .s_addr) { | |
1208 | json_object_object_add( | |
1209 | json, | |
ee2bbf7c MS |
1210 | inet_ntop(AF_INET, |
1211 | &prev_rp_info->rp | |
d62a17ae | 1212 | .rpf_addr.u |
ee2bbf7c MS |
1213 | .prefix4, |
1214 | buf, sizeof(buf)), | |
d62a17ae | 1215 | json_rp_rows); |
1216 | json_rp_rows = NULL; | |
1217 | } | |
1218 | ||
1219 | if (!json_rp_rows) | |
1220 | json_rp_rows = json_object_new_array(); | |
1221 | ||
1222 | json_row = json_object_new_object(); | |
b0d5264e DA |
1223 | json_object_string_addf( |
1224 | json_row, "rpAddress", "%pI4", | |
1225 | &rp_info->rp.rpf_addr.u.prefix4); | |
d62a17ae | 1226 | if (rp_info->rp.source_nexthop.interface) |
1227 | json_object_string_add( | |
1228 | json_row, "outboundInterface", | |
1229 | rp_info->rp.source_nexthop | |
1230 | .interface->name); | |
a7a5472e SP |
1231 | else |
1232 | json_object_string_add( | |
1233 | json_row, "outboundInterface", | |
1234 | "Unknown"); | |
d62a17ae | 1235 | if (rp_info->i_am_rp) |
1236 | json_object_boolean_true_add(json_row, | |
1237 | "iAmRP"); | |
a7a5472e SP |
1238 | else |
1239 | json_object_boolean_false_add(json_row, | |
1240 | "iAmRP"); | |
d62a17ae | 1241 | |
1242 | if (rp_info->plist) | |
1243 | json_object_string_add(json_row, | |
1244 | "prefixList", | |
1245 | rp_info->plist); | |
1246 | else | |
9afa5231 DA |
1247 | json_object_string_addf( |
1248 | json_row, "group", "%pFX", | |
1249 | &rp_info->group); | |
d0e418b4 | 1250 | json_object_string_add(json_row, "source", |
025725f7 | 1251 | source); |
d62a17ae | 1252 | |
1253 | json_object_array_add(json_rp_rows, json_row); | |
1254 | } else { | |
1255 | vty_out(vty, "%-15s ", | |
ee2bbf7c MS |
1256 | inet_ntop(AF_INET, |
1257 | &rp_info->rp.rpf_addr.u | |
1258 | .prefix4, | |
1259 | buf, sizeof(buf))); | |
d62a17ae | 1260 | |
1261 | if (rp_info->plist) | |
1262 | vty_out(vty, "%-18s ", rp_info->plist); | |
1263 | else | |
2dbe669b DA |
1264 | vty_out(vty, "%-18pFX ", |
1265 | &rp_info->group); | |
d62a17ae | 1266 | |
1267 | if (rp_info->rp.source_nexthop.interface) | |
ff415346 | 1268 | vty_out(vty, "%-16s ", |
d62a17ae | 1269 | rp_info->rp.source_nexthop |
1270 | .interface->name); | |
1271 | else | |
ff415346 | 1272 | vty_out(vty, "%-16s ", "(Unknown)"); |
d62a17ae | 1273 | |
1274 | if (rp_info->i_am_rp) | |
d6593fc5 | 1275 | vty_out(vty, "yes"); |
d62a17ae | 1276 | else |
025725f7 | 1277 | vty_out(vty, "no"); |
d62a17ae | 1278 | |
025725f7 | 1279 | vty_out(vty, "%14s\n", source); |
1280 | } | |
d62a17ae | 1281 | prev_rp_info = rp_info; |
1282 | } | |
1283 | } | |
1284 | ||
1285 | if (uj) { | |
1286 | if (prev_rp_info && json_rp_rows) | |
1287 | json_object_object_add( | |
1288 | json, | |
ee2bbf7c MS |
1289 | inet_ntop(AF_INET, |
1290 | &prev_rp_info->rp.rpf_addr.u.prefix4, | |
1291 | buf, sizeof(buf)), | |
d62a17ae | 1292 | json_rp_rows); |
1293 | ||
129f5638 | 1294 | vty_json(vty, json); |
d62a17ae | 1295 | } |
00d07c6f | 1296 | } |
cba44481 | 1297 | |
c9cd7fbc | 1298 | void pim_resolve_rp_nh(struct pim_instance *pim, struct pim_neighbor *nbr) |
cba44481 | 1299 | { |
d62a17ae | 1300 | struct listnode *node = NULL; |
1301 | struct rp_info *rp_info = NULL; | |
1302 | struct nexthop *nh_node = NULL; | |
1303 | struct prefix nht_p; | |
1304 | struct pim_nexthop_cache pnc; | |
d62a17ae | 1305 | |
d9c9a9ee | 1306 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
cc144e8b | 1307 | if (pim_rpf_addr_is_inaddr_any(&rp_info->rp)) |
d62a17ae | 1308 | continue; |
1309 | ||
1310 | nht_p.family = AF_INET; | |
1311 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
1312 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
1313 | memset(&pnc, 0, sizeof(struct pim_nexthop_cache)); | |
fec883d9 | 1314 | if (!pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, |
4efdb9c6 | 1315 | &pnc)) |
cb9c7c50 DS |
1316 | continue; |
1317 | ||
1318 | for (nh_node = pnc.nexthop; nh_node; nh_node = nh_node->next) { | |
3a6290bd | 1319 | if (nh_node->gate.ipv4.s_addr != INADDR_ANY) |
cb9c7c50 DS |
1320 | continue; |
1321 | ||
1322 | struct interface *ifp1 = if_lookup_by_index( | |
d3cc1e45 | 1323 | nh_node->ifindex, pim->vrf->vrf_id); |
c9cd7fbc DS |
1324 | |
1325 | if (nbr->interface != ifp1) | |
cb9c7c50 DS |
1326 | continue; |
1327 | ||
ae449dc5 | 1328 | #if PIM_IPV == 4 |
cb9c7c50 | 1329 | nh_node->gate.ipv4 = nbr->source_addr; |
9bb93fa0 DL |
1330 | #else |
1331 | nh_node->gate.ipv6 = nbr->source_addr; | |
1332 | #endif | |
3d225d48 | 1333 | if (PIM_DEBUG_PIM_NHT_RP) { |
cb9c7c50 | 1334 | char str[PREFIX_STRLEN]; |
cb9c7c50 DS |
1335 | pim_addr_dump("<nht_addr?>", &nht_p, str, |
1336 | sizeof(str)); | |
1337 | zlog_debug( | |
9bb93fa0 DL |
1338 | "%s: addr %s new nexthop addr %pPAs interface %s", |
1339 | __func__, str, &nbr->source_addr, | |
1340 | ifp1->name); | |
d62a17ae | 1341 | } |
1342 | } | |
1343 | } | |
cba44481 | 1344 | } |