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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 DS |
41 | #include "pim_str.h" |
42 | #include "pim_rpf.h" | |
13afbd05 | 43 | #include "pim_sock.h" |
36d6bd7d | 44 | #include "pim_memory.h" |
00d07c6f | 45 | #include "pim_iface.h" |
7667c556 | 46 | #include "pim_msdp.h" |
1bc98276 | 47 | #include "pim_nht.h" |
28309df0 SP |
48 | #include "pim_mroute.h" |
49 | #include "pim_oil.h" | |
50 | #include "pim_zebra.h" | |
d0e418b4 | 51 | #include "pim_bsm.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 | |
2e8345c1 | 117 | if (!str2prefix("224.0.0.0/4", &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; |
126 | rp_info->rp.rpf_addr.family = AF_INET; | |
127 | rp_info->rp.rpf_addr.prefixlen = IPV4_MAX_PREFIXLEN; | |
128 | rp_info->rp.rpf_addr.u.prefix4.s_addr = INADDR_NONE; | |
36d6bd7d | 129 | |
d9c9a9ee | 130 | listnode_add(pim->rp_list, rp_info); |
89b68082 DS |
131 | |
132 | rn = route_node_get(pim->rp_table, &rp_info->group); | |
89b68082 DS |
133 | rn->info = rp_info; |
134 | if (PIM_DEBUG_TRACE) | |
996c9314 LB |
135 | zlog_debug( |
136 | "Allocated: %p for rp_info: %p(224.0.0.0/4) Lock: %d", | |
137 | rn, rp_info, rn->lock); | |
36d6bd7d DS |
138 | } |
139 | ||
d9c9a9ee | 140 | void pim_rp_free(struct pim_instance *pim) |
36d6bd7d | 141 | { |
d9c9a9ee | 142 | if (pim->rp_list) |
6a154c88 | 143 | list_delete(&pim->rp_list); |
36d6bd7d DS |
144 | } |
145 | ||
dfe43e25 DW |
146 | /* |
147 | * Given an RP's prefix-list, return the RP's rp_info for that prefix-list | |
148 | */ | |
d9c9a9ee DS |
149 | static struct rp_info *pim_rp_find_prefix_list(struct pim_instance *pim, |
150 | struct in_addr rp, | |
d62a17ae | 151 | const char *plist) |
36d6bd7d | 152 | { |
d62a17ae | 153 | struct listnode *node; |
154 | struct rp_info *rp_info; | |
155 | ||
d9c9a9ee | 156 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 157 | if (rp.s_addr == rp_info->rp.rpf_addr.u.prefix4.s_addr |
158 | && rp_info->plist && strcmp(rp_info->plist, plist) == 0) { | |
159 | return rp_info; | |
160 | } | |
161 | } | |
162 | ||
163 | return NULL; | |
36d6bd7d DS |
164 | } |
165 | ||
dfe43e25 DW |
166 | /* |
167 | * Return true if plist is used by any rp_info | |
168 | */ | |
d9c9a9ee | 169 | static int pim_rp_prefix_list_used(struct pim_instance *pim, const char *plist) |
dfe43e25 | 170 | { |
d62a17ae | 171 | struct listnode *node; |
172 | struct rp_info *rp_info; | |
173 | ||
d9c9a9ee | 174 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 175 | if (rp_info->plist && strcmp(rp_info->plist, plist) == 0) { |
176 | return 1; | |
177 | } | |
178 | } | |
179 | ||
180 | return 0; | |
dfe43e25 DW |
181 | } |
182 | ||
183 | /* | |
d62a17ae | 184 | * Given an RP's address, return the RP's rp_info that is an exact match for |
185 | * 'group' | |
dfe43e25 | 186 | */ |
d9c9a9ee DS |
187 | static struct rp_info *pim_rp_find_exact(struct pim_instance *pim, |
188 | struct in_addr rp, | |
123214ef | 189 | const struct prefix *group) |
36d6bd7d | 190 | { |
d62a17ae | 191 | struct listnode *node; |
192 | struct rp_info *rp_info; | |
36d6bd7d | 193 | |
d9c9a9ee | 194 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 195 | if (rp.s_addr == rp_info->rp.rpf_addr.u.prefix4.s_addr |
196 | && prefix_same(&rp_info->group, group)) | |
197 | return rp_info; | |
198 | } | |
54b97c74 | 199 | |
d62a17ae | 200 | return NULL; |
36d6bd7d DS |
201 | } |
202 | ||
dfe43e25 DW |
203 | /* |
204 | * Given a group, return the rp_info for that group | |
205 | */ | |
28309df0 | 206 | struct rp_info *pim_rp_find_match_group(struct pim_instance *pim, |
123214ef | 207 | const struct prefix *group) |
36d6bd7d | 208 | { |
d62a17ae | 209 | struct listnode *node; |
b77b1550 | 210 | struct rp_info *best = NULL; |
d62a17ae | 211 | struct rp_info *rp_info; |
212 | struct prefix_list *plist; | |
123214ef | 213 | const struct prefix *p, *bp; |
89b68082 | 214 | struct route_node *rn; |
d62a17ae | 215 | |
4646b86a | 216 | bp = NULL; |
d9c9a9ee | 217 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 218 | if (rp_info->plist) { |
219 | plist = prefix_list_lookup(AFI_IP, rp_info->plist); | |
220 | ||
996c9314 LB |
221 | if (prefix_list_apply_which_prefix(plist, &p, group) |
222 | == PREFIX_DENY) | |
b77b1550 DS |
223 | continue; |
224 | ||
225 | if (!best) { | |
226 | best = rp_info; | |
227 | bp = p; | |
228 | continue; | |
229 | } | |
230 | ||
4646b86a | 231 | if (bp && bp->prefixlen < p->prefixlen) { |
b77b1550 DS |
232 | best = rp_info; |
233 | bp = p; | |
234 | } | |
d62a17ae | 235 | } |
236 | } | |
237 | ||
89b68082 DS |
238 | rn = route_node_match(pim->rp_table, group); |
239 | if (!rn) { | |
af4c2728 | 240 | flog_err( |
450971aa | 241 | EC_LIB_DEVELOPMENT, |
996c9314 LB |
242 | "%s: BUG We should have found default group information\n", |
243 | __PRETTY_FUNCTION__); | |
89b68082 DS |
244 | return best; |
245 | } | |
246 | ||
247 | rp_info = rn->info; | |
248 | if (PIM_DEBUG_TRACE) { | |
249 | char buf[PREFIX_STRLEN]; | |
250 | ||
251 | route_unlock_node(rn); | |
996c9314 LB |
252 | zlog_debug("Lookedup: %p for rp_info: %p(%s) Lock: %d", rn, |
253 | rp_info, | |
89b68082 DS |
254 | prefix2str(&rp_info->group, buf, sizeof(buf)), |
255 | rn->lock); | |
256 | } | |
257 | ||
258 | if (!best) | |
259 | return rp_info; | |
260 | ||
261 | if (rp_info->group.prefixlen < best->group.prefixlen) | |
262 | best = rp_info; | |
263 | ||
b77b1550 | 264 | return best; |
36d6bd7d | 265 | } |
75a26779 | 266 | |
dfe43e25 DW |
267 | /* |
268 | * When the user makes "ip pim rp" configuration changes or if they change the | |
269 | * prefix-list(s) used by these statements we must tickle the upstream state | |
270 | * for each group to make them re-lookup who their RP should be. | |
271 | * | |
272 | * This is a placeholder function for now. | |
273 | */ | |
472ad383 | 274 | static void pim_rp_refresh_group_to_rp_mapping(struct pim_instance *pim) |
dfe43e25 | 275 | { |
472ad383 | 276 | pim_msdp_i_am_rp_changed(pim); |
dfe43e25 DW |
277 | } |
278 | ||
d9c9a9ee DS |
279 | void pim_rp_prefix_list_update(struct pim_instance *pim, |
280 | struct prefix_list *plist) | |
dfe43e25 | 281 | { |
d62a17ae | 282 | struct listnode *node; |
283 | struct rp_info *rp_info; | |
284 | int refresh_needed = 0; | |
285 | ||
d9c9a9ee | 286 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 287 | if (rp_info->plist |
288 | && strcmp(rp_info->plist, prefix_list_name(plist)) == 0) { | |
289 | refresh_needed = 1; | |
290 | break; | |
291 | } | |
292 | } | |
293 | ||
294 | if (refresh_needed) | |
472ad383 | 295 | pim_rp_refresh_group_to_rp_mapping(pim); |
dfe43e25 DW |
296 | } |
297 | ||
d62a17ae | 298 | static int pim_rp_check_interface_addrs(struct rp_info *rp_info, |
299 | struct pim_interface *pim_ifp) | |
7176984f | 300 | { |
d62a17ae | 301 | struct listnode *node; |
302 | struct pim_secondary_addr *sec_addr; | |
7176984f | 303 | |
d62a17ae | 304 | if (pim_ifp->primary_address.s_addr |
305 | == rp_info->rp.rpf_addr.u.prefix4.s_addr) | |
306 | return 1; | |
7176984f | 307 | |
d62a17ae | 308 | if (!pim_ifp->sec_addr_list) { |
309 | return 0; | |
310 | } | |
7176984f | 311 | |
d62a17ae | 312 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->sec_addr_list, node, sec_addr)) { |
313 | if (prefix_same(&sec_addr->addr, &rp_info->rp.rpf_addr)) { | |
314 | return 1; | |
315 | } | |
316 | } | |
7176984f | 317 | |
d62a17ae | 318 | return 0; |
7176984f | 319 | } |
320 | ||
fec883d9 DS |
321 | static void pim_rp_check_interfaces(struct pim_instance *pim, |
322 | struct rp_info *rp_info) | |
00d07c6f | 323 | { |
d62a17ae | 324 | struct interface *ifp; |
00d07c6f | 325 | |
d62a17ae | 326 | rp_info->i_am_rp = 0; |
451fda4f | 327 | FOR_ALL_INTERFACES (pim->vrf, ifp) { |
d62a17ae | 328 | struct pim_interface *pim_ifp = ifp->info; |
00d07c6f | 329 | |
d62a17ae | 330 | if (!pim_ifp) |
331 | continue; | |
00d07c6f | 332 | |
d62a17ae | 333 | if (pim_rp_check_interface_addrs(rp_info, pim_ifp)) { |
334 | rp_info->i_am_rp = 1; | |
335 | } | |
336 | } | |
00d07c6f DS |
337 | } |
338 | ||
28309df0 SP |
339 | void pim_upstream_update(struct pim_instance *pim, struct pim_upstream *up) |
340 | { | |
341 | struct pim_rpf old_rpf; | |
342 | enum pim_rpf_result rpf_result; | |
343 | struct in_addr old_upstream_addr; | |
344 | struct in_addr new_upstream_addr; | |
345 | struct prefix nht_p; | |
346 | ||
347 | old_upstream_addr = up->upstream_addr; | |
348 | pim_rp_set_upstream_addr(pim, &new_upstream_addr, up->sg.src, | |
349 | up->sg.grp); | |
350 | ||
351 | if (PIM_DEBUG_TRACE) | |
352 | zlog_debug("%s: pim upstream update for old upstream %s", | |
353 | __PRETTY_FUNCTION__, | |
354 | inet_ntoa(old_upstream_addr)); | |
355 | ||
356 | if (old_upstream_addr.s_addr == new_upstream_addr.s_addr) | |
357 | return; | |
358 | ||
359 | /* Lets consider a case, where a PIM upstream has a better RP as a | |
360 | * result of a new RP configuration with more precise group range. | |
361 | * This upstream has to be added to the upstream hash of new RP's | |
362 | * NHT(pnc) and has to be removed from old RP's NHT upstream hash | |
363 | */ | |
364 | if (old_upstream_addr.s_addr != INADDR_ANY) { | |
365 | /* Deregister addr with Zebra NHT */ | |
366 | nht_p.family = AF_INET; | |
367 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
368 | nht_p.u.prefix4 = old_upstream_addr; | |
369 | if (PIM_DEBUG_TRACE) { | |
370 | char buf[PREFIX2STR_BUFFER]; | |
371 | ||
372 | prefix2str(&nht_p, buf, sizeof(buf)); | |
373 | zlog_debug("%s: Deregister upstream %s addr %s with Zebra NHT", | |
374 | __PRETTY_FUNCTION__, up->sg_str, buf); | |
375 | } | |
4533b847 | 376 | pim_delete_tracked_nexthop(pim, &nht_p, up, NULL, false); |
28309df0 SP |
377 | } |
378 | ||
379 | /* Update the upstream address */ | |
380 | up->upstream_addr = new_upstream_addr; | |
381 | ||
382 | old_rpf.source_nexthop.interface = up->rpf.source_nexthop.interface; | |
383 | ||
384 | rpf_result = pim_rpf_update(pim, up, &old_rpf, 1); | |
385 | if (rpf_result == PIM_RPF_FAILURE) | |
386 | pim_mroute_del(up->channel_oil, __PRETTY_FUNCTION__); | |
387 | ||
388 | /* update kernel multicast forwarding cache (MFC) */ | |
389 | if (up->rpf.source_nexthop.interface && up->channel_oil) { | |
390 | ifindex_t ifindex = up->rpf.source_nexthop.interface->ifindex; | |
391 | int vif_index = pim_if_find_vifindex_by_ifindex(pim, ifindex); | |
392 | /* Pass Current selected NH vif index to mroute download */ | |
393 | if (vif_index) | |
394 | pim_scan_individual_oil(up->channel_oil, vif_index); | |
395 | else { | |
396 | if (PIM_DEBUG_PIM_NHT) | |
397 | zlog_debug( | |
398 | "%s: NHT upstream %s channel_oil IIF %s vif_index is not valid", | |
399 | __PRETTY_FUNCTION__, up->sg_str, | |
400 | up->rpf.source_nexthop.interface->name); | |
401 | } | |
402 | } | |
403 | ||
404 | if (rpf_result == PIM_RPF_CHANGED) | |
405 | pim_zebra_upstream_rpf_changed(pim, up, &old_rpf); | |
406 | ||
407 | pim_zebra_update_all_interfaces(pim); | |
408 | } | |
409 | ||
d0e418b4 | 410 | int pim_rp_new_config(struct pim_instance *pim, const char *rp, |
411 | const char *group_range, const char *plist) | |
75a26779 | 412 | { |
d62a17ae | 413 | int result = 0; |
d0e418b4 | 414 | struct prefix group; |
415 | struct in_addr rp_addr; | |
416 | ||
417 | if (group_range == NULL) | |
418 | result = str2prefix("224.0.0.0/4", &group); | |
419 | else { | |
420 | result = str2prefix(group_range, &group); | |
421 | if (result) { | |
422 | struct prefix temp; | |
423 | ||
424 | prefix_copy(&temp, &group); | |
425 | apply_mask(&temp); | |
426 | if (!prefix_same(&group, &temp)) | |
427 | return PIM_GROUP_BAD_ADDR_MASK_COMBO; | |
428 | } | |
429 | } | |
430 | ||
431 | if (!result) | |
432 | return PIM_GROUP_BAD_ADDRESS; | |
433 | ||
434 | result = inet_pton(AF_INET, rp, &rp_addr); | |
435 | ||
436 | if (result <= 0) | |
437 | return PIM_RP_BAD_ADDRESS; | |
438 | ||
439 | result = pim_rp_new(pim, rp_addr, group, plist, RP_SRC_STATIC); | |
440 | return result; | |
441 | } | |
442 | ||
443 | int pim_rp_new(struct pim_instance *pim, struct in_addr rp_addr, | |
444 | struct prefix group, const char *plist, | |
445 | enum rp_source rp_src_flag) | |
446 | { | |
447 | int result = 0; | |
448 | char rp[INET_ADDRSTRLEN]; | |
d62a17ae | 449 | struct rp_info *rp_info; |
450 | struct rp_info *rp_all; | |
451 | struct prefix group_all; | |
452 | struct listnode *node, *nnode; | |
453 | struct rp_info *tmp_rp_info; | |
454 | char buffer[BUFSIZ]; | |
455 | struct prefix nht_p; | |
89b68082 | 456 | struct route_node *rn; |
28309df0 SP |
457 | struct pim_upstream *up; |
458 | struct listnode *upnode; | |
d62a17ae | 459 | |
460 | rp_info = XCALLOC(MTYPE_PIM_RP, sizeof(*rp_info)); | |
d62a17ae | 461 | |
d62a17ae | 462 | rp_info->rp.rpf_addr.family = AF_INET; |
463 | rp_info->rp.rpf_addr.prefixlen = IPV4_MAX_PREFIXLEN; | |
d0e418b4 | 464 | rp_info->rp.rpf_addr.u.prefix4 = rp_addr; |
465 | prefix_copy(&rp_info->group, &group); | |
466 | rp_info->rp_src = rp_src_flag; | |
d62a17ae | 467 | |
d0e418b4 | 468 | inet_ntop(AF_INET, &rp_info->rp.rpf_addr.u.prefix4, rp, sizeof(rp)); |
d62a17ae | 469 | |
470 | if (plist) { | |
471 | /* | |
472 | * Return if the prefix-list is already configured for this RP | |
473 | */ | |
d9c9a9ee | 474 | if (pim_rp_find_prefix_list(pim, rp_info->rp.rpf_addr.u.prefix4, |
d62a17ae | 475 | plist)) { |
476 | XFREE(MTYPE_PIM_RP, rp_info); | |
477 | return PIM_SUCCESS; | |
478 | } | |
479 | ||
480 | /* | |
481 | * Barf if the prefix-list is already configured for an RP | |
482 | */ | |
d9c9a9ee | 483 | if (pim_rp_prefix_list_used(pim, plist)) { |
d62a17ae | 484 | XFREE(MTYPE_PIM_RP, rp_info); |
485 | return PIM_RP_PFXLIST_IN_USE; | |
486 | } | |
487 | ||
488 | /* | |
489 | * Free any existing rp_info entries for this RP | |
490 | */ | |
d9c9a9ee | 491 | for (ALL_LIST_ELEMENTS(pim->rp_list, node, nnode, |
d62a17ae | 492 | tmp_rp_info)) { |
493 | if (rp_info->rp.rpf_addr.u.prefix4.s_addr | |
494 | == tmp_rp_info->rp.rpf_addr.u.prefix4.s_addr) { | |
495 | if (tmp_rp_info->plist) | |
d0e418b4 | 496 | pim_rp_del_config(pim, rp, NULL, |
497 | tmp_rp_info->plist); | |
d62a17ae | 498 | else |
d0e418b4 | 499 | pim_rp_del_config( |
fec883d9 | 500 | pim, rp, |
d62a17ae | 501 | prefix2str(&tmp_rp_info->group, |
502 | buffer, BUFSIZ), | |
503 | NULL); | |
504 | } | |
505 | } | |
506 | ||
507 | rp_info->plist = XSTRDUP(MTYPE_PIM_FILTER_NAME, plist); | |
508 | } else { | |
89b68082 | 509 | |
2e8345c1 DS |
510 | if (!str2prefix("224.0.0.0/4", &group_all)) { |
511 | XFREE(MTYPE_PIM_RP, rp_info); | |
512 | return PIM_GROUP_BAD_ADDRESS; | |
513 | } | |
d9c9a9ee | 514 | rp_all = pim_rp_find_match_group(pim, &group_all); |
d62a17ae | 515 | |
516 | /* | |
517 | * Barf if group is a non-multicast subnet | |
518 | */ | |
519 | if (!prefix_match(&rp_all->group, &rp_info->group)) { | |
520 | XFREE(MTYPE_PIM_RP, rp_info); | |
521 | return PIM_GROUP_BAD_ADDRESS; | |
522 | } | |
523 | ||
524 | /* | |
525 | * Remove any prefix-list rp_info entries for this RP | |
526 | */ | |
d9c9a9ee | 527 | for (ALL_LIST_ELEMENTS(pim->rp_list, node, nnode, |
d62a17ae | 528 | tmp_rp_info)) { |
529 | if (tmp_rp_info->plist | |
530 | && rp_info->rp.rpf_addr.u.prefix4.s_addr | |
531 | == tmp_rp_info->rp.rpf_addr.u.prefix4 | |
532 | .s_addr) { | |
d0e418b4 | 533 | pim_rp_del_config(pim, rp, NULL, |
534 | tmp_rp_info->plist); | |
d62a17ae | 535 | } |
536 | } | |
537 | ||
538 | /* | |
539 | * Take over the 224.0.0.0/4 group if the rp is INADDR_NONE | |
540 | */ | |
541 | if (prefix_same(&rp_all->group, &rp_info->group) | |
542 | && pim_rpf_addr_is_inaddr_none(&rp_all->rp)) { | |
543 | rp_all->rp.rpf_addr = rp_info->rp.rpf_addr; | |
d0e418b4 | 544 | rp_all->rp_src = rp_src_flag; |
d62a17ae | 545 | XFREE(MTYPE_PIM_RP, rp_info); |
546 | ||
547 | /* Register addr with Zebra NHT */ | |
548 | nht_p.family = AF_INET; | |
549 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
550 | nht_p.u.prefix4 = | |
551 | rp_all->rp.rpf_addr.u.prefix4; // RP address | |
3d225d48 | 552 | if (PIM_DEBUG_PIM_NHT_RP) { |
d62a17ae | 553 | char buf[PREFIX2STR_BUFFER]; |
554 | char buf1[PREFIX2STR_BUFFER]; | |
555 | prefix2str(&nht_p, buf, sizeof(buf)); | |
556 | prefix2str(&rp_all->group, buf1, sizeof(buf1)); | |
557 | zlog_debug( | |
558 | "%s: NHT Register rp_all addr %s grp %s ", | |
559 | __PRETTY_FUNCTION__, buf, buf1); | |
560 | } | |
28309df0 SP |
561 | |
562 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, | |
563 | up)) { | |
564 | /* Find (*, G) upstream whose RP is not | |
565 | * configured yet | |
566 | */ | |
567 | if ((up->upstream_addr.s_addr == INADDR_ANY) | |
568 | && (up->sg.src.s_addr == INADDR_ANY)) { | |
569 | struct prefix grp; | |
570 | struct rp_info *trp_info; | |
571 | ||
572 | grp.family = AF_INET; | |
573 | grp.prefixlen = IPV4_MAX_BITLEN; | |
574 | grp.u.prefix4 = up->sg.grp; | |
d0e418b4 | 575 | trp_info = pim_rp_find_match_group( |
576 | pim, &grp); | |
28309df0 SP |
577 | if (trp_info == rp_all) |
578 | pim_upstream_update(pim, up); | |
579 | } | |
580 | } | |
581 | ||
5bd51314 DS |
582 | pim_rp_check_interfaces(pim, rp_all); |
583 | pim_rp_refresh_group_to_rp_mapping(pim); | |
43763b11 | 584 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_all, |
4533b847 | 585 | false, NULL); |
586 | ||
43763b11 DS |
587 | if (!pim_ecmp_nexthop_lookup(pim, |
588 | &rp_all->rp.source_nexthop, | |
589 | &nht_p, &rp_all->group, 1)) | |
590 | return PIM_RP_NO_PATH; | |
d62a17ae | 591 | return PIM_SUCCESS; |
592 | } | |
593 | ||
594 | /* | |
595 | * Return if the group is already configured for this RP | |
596 | */ | |
d0e418b4 | 597 | tmp_rp_info = pim_rp_find_exact( |
598 | pim, rp_info->rp.rpf_addr.u.prefix4, &rp_info->group); | |
599 | if (tmp_rp_info) { | |
600 | if ((tmp_rp_info->rp_src != rp_src_flag) | |
601 | && (rp_src_flag == RP_SRC_STATIC)) | |
602 | tmp_rp_info->rp_src = rp_src_flag; | |
d62a17ae | 603 | XFREE(MTYPE_PIM_RP, rp_info); |
d0e418b4 | 604 | return result; |
d62a17ae | 605 | } |
606 | ||
607 | /* | |
608 | * Barf if this group is already covered by some other RP | |
609 | */ | |
d9c9a9ee | 610 | tmp_rp_info = pim_rp_find_match_group(pim, &rp_info->group); |
d62a17ae | 611 | |
612 | if (tmp_rp_info) { | |
613 | if (tmp_rp_info->plist) { | |
614 | XFREE(MTYPE_PIM_RP, rp_info); | |
615 | return PIM_GROUP_PFXLIST_OVERLAP; | |
616 | } else { | |
617 | /* | |
618 | * If the only RP that covers this group is an | |
619 | * RP configured for | |
620 | * 224.0.0.0/4 that is fine, ignore that one. | |
621 | * For all others | |
622 | * though we must return PIM_GROUP_OVERLAP | |
623 | */ | |
89b68082 DS |
624 | if (prefix_same(&rp_info->group, |
625 | &tmp_rp_info->group)) { | |
d0e418b4 | 626 | if ((rp_src_flag == RP_SRC_STATIC) |
627 | && (tmp_rp_info->rp_src | |
628 | == RP_SRC_STATIC)) { | |
629 | XFREE(MTYPE_PIM_RP, rp_info); | |
630 | return PIM_GROUP_OVERLAP; | |
631 | } | |
632 | ||
633 | result = pim_rp_change( | |
634 | pim, | |
635 | rp_info->rp.rpf_addr.u.prefix4, | |
636 | tmp_rp_info->group, | |
637 | rp_src_flag); | |
d62a17ae | 638 | XFREE(MTYPE_PIM_RP, rp_info); |
d0e418b4 | 639 | return result; |
d62a17ae | 640 | } |
641 | } | |
642 | } | |
643 | } | |
644 | ||
d9c9a9ee | 645 | listnode_add_sort(pim->rp_list, rp_info); |
89b68082 | 646 | rn = route_node_get(pim->rp_table, &rp_info->group); |
89b68082 DS |
647 | rn->info = rp_info; |
648 | ||
649 | if (PIM_DEBUG_TRACE) { | |
650 | char buf[PREFIX_STRLEN]; | |
651 | ||
996c9314 LB |
652 | zlog_debug("Allocated: %p for rp_info: %p(%s) Lock: %d", rn, |
653 | rp_info, | |
89b68082 DS |
654 | prefix2str(&rp_info->group, buf, sizeof(buf)), |
655 | rn->lock); | |
656 | } | |
d62a17ae | 657 | |
28309df0 SP |
658 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, up)) { |
659 | if (up->sg.src.s_addr == INADDR_ANY) { | |
660 | struct prefix grp; | |
661 | struct rp_info *trp_info; | |
662 | ||
663 | grp.family = AF_INET; | |
664 | grp.prefixlen = IPV4_MAX_BITLEN; | |
665 | grp.u.prefix4 = up->sg.grp; | |
666 | trp_info = pim_rp_find_match_group(pim, &grp); | |
667 | ||
668 | if (trp_info == rp_info) | |
669 | pim_upstream_update(pim, up); | |
670 | } | |
671 | } | |
672 | ||
5bd51314 DS |
673 | pim_rp_check_interfaces(pim, rp_info); |
674 | pim_rp_refresh_group_to_rp_mapping(pim); | |
675 | ||
d62a17ae | 676 | /* Register addr with Zebra NHT */ |
677 | nht_p.family = AF_INET; | |
678 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
679 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
3d225d48 | 680 | if (PIM_DEBUG_PIM_NHT_RP) { |
d62a17ae | 681 | char buf[PREFIX2STR_BUFFER]; |
682 | char buf1[PREFIX2STR_BUFFER]; | |
683 | prefix2str(&nht_p, buf, sizeof(buf)); | |
684 | prefix2str(&rp_info->group, buf1, sizeof(buf1)); | |
685 | zlog_debug("%s: NHT Register RP addr %s grp %s with Zebra ", | |
686 | __PRETTY_FUNCTION__, buf, buf1); | |
687 | } | |
4533b847 | 688 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, false, NULL); |
43763b11 DS |
689 | if (!pim_ecmp_nexthop_lookup(pim, &rp_info->rp.source_nexthop, &nht_p, |
690 | &rp_info->group, 1)) | |
691 | return PIM_RP_NO_PATH; | |
d62a17ae | 692 | |
d62a17ae | 693 | return PIM_SUCCESS; |
75a26779 DS |
694 | } |
695 | ||
d0e418b4 | 696 | int pim_rp_del_config(struct pim_instance *pim, const char *rp, |
697 | const char *group_range, const char *plist) | |
75a26779 | 698 | { |
d62a17ae | 699 | struct prefix group; |
700 | struct in_addr rp_addr; | |
d62a17ae | 701 | int result; |
d62a17ae | 702 | |
703 | if (group_range == NULL) | |
704 | result = str2prefix("224.0.0.0/4", &group); | |
705 | else | |
706 | result = str2prefix(group_range, &group); | |
707 | ||
708 | if (!result) | |
709 | return PIM_GROUP_BAD_ADDRESS; | |
710 | ||
711 | result = inet_pton(AF_INET, rp, &rp_addr); | |
712 | if (result <= 0) | |
713 | return PIM_RP_BAD_ADDRESS; | |
714 | ||
d0e418b4 | 715 | result = pim_rp_del(pim, rp_addr, group, plist, RP_SRC_STATIC); |
716 | return result; | |
717 | } | |
718 | ||
719 | int pim_rp_del(struct pim_instance *pim, struct in_addr rp_addr, | |
720 | struct prefix group, const char *plist, | |
721 | enum rp_source rp_src_flag) | |
722 | { | |
723 | struct prefix g_all; | |
724 | struct rp_info *rp_info; | |
725 | struct rp_info *rp_all; | |
726 | struct prefix nht_p; | |
727 | struct route_node *rn; | |
728 | bool was_plist = false; | |
729 | struct rp_info *trp_info; | |
730 | struct pim_upstream *up; | |
731 | struct listnode *upnode; | |
732 | struct bsgrp_node *bsgrp = NULL; | |
733 | struct bsm_rpinfo *bsrp = NULL; | |
734 | char grp_str[PREFIX2STR_BUFFER]; | |
735 | char rp_str[INET_ADDRSTRLEN]; | |
736 | ||
737 | if (!inet_ntop(AF_INET, &rp_addr, rp_str, sizeof(rp_str))) | |
738 | sprintf(rp_str, "<rp?>"); | |
739 | prefix2str(&group, grp_str, sizeof(grp_str)); | |
740 | ||
d62a17ae | 741 | if (plist) |
d9c9a9ee | 742 | rp_info = pim_rp_find_prefix_list(pim, rp_addr, plist); |
d62a17ae | 743 | else |
d9c9a9ee | 744 | rp_info = pim_rp_find_exact(pim, rp_addr, &group); |
d62a17ae | 745 | |
746 | if (!rp_info) | |
747 | return PIM_RP_NOT_FOUND; | |
748 | ||
749 | if (rp_info->plist) { | |
750 | XFREE(MTYPE_PIM_FILTER_NAME, rp_info->plist); | |
89b68082 | 751 | was_plist = true; |
d62a17ae | 752 | } |
753 | ||
d0e418b4 | 754 | if (PIM_DEBUG_TRACE) |
755 | zlog_debug("%s: Delete RP %s for the group %s", | |
756 | __PRETTY_FUNCTION__, rp_str, grp_str); | |
757 | ||
758 | /* While static RP is getting deleted, we need to check if dynamic RP | |
759 | * present for the same group in BSM RP table, then install the dynamic | |
760 | * RP for the group node into the main rp table | |
761 | */ | |
762 | if (rp_src_flag == RP_SRC_STATIC) { | |
763 | bsgrp = pim_bsm_get_bsgrp_node(&pim->global_scope, &group); | |
764 | ||
765 | if (bsgrp) { | |
766 | bsrp = listnode_head(bsgrp->bsrp_list); | |
767 | if (bsrp) { | |
768 | if (PIM_DEBUG_TRACE) { | |
769 | char bsrp_str[INET_ADDRSTRLEN]; | |
770 | ||
771 | if (!inet_ntop(AF_INET, bsrp, bsrp_str, | |
772 | sizeof(bsrp_str))) | |
773 | sprintf(bsrp_str, "<bsrp?>"); | |
774 | ||
775 | zlog_debug("%s: BSM RP %s found for the group %s", | |
776 | __PRETTY_FUNCTION__, | |
777 | bsrp_str, grp_str); | |
778 | } | |
779 | return pim_rp_change(pim, bsrp->rp_address, | |
780 | group, RP_SRC_BSR); | |
781 | } | |
782 | } else { | |
783 | if (PIM_DEBUG_TRACE) | |
784 | zlog_debug( | |
785 | "%s: BSM RP not found for the group %s", | |
786 | __PRETTY_FUNCTION__, grp_str); | |
787 | } | |
788 | } | |
789 | ||
d62a17ae | 790 | /* Deregister addr with Zebra NHT */ |
791 | nht_p.family = AF_INET; | |
792 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
793 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
3d225d48 | 794 | if (PIM_DEBUG_PIM_NHT_RP) { |
d62a17ae | 795 | char buf[PREFIX2STR_BUFFER]; |
796 | prefix2str(&nht_p, buf, sizeof(buf)); | |
797 | zlog_debug("%s: Deregister RP addr %s with Zebra ", | |
798 | __PRETTY_FUNCTION__, buf); | |
799 | } | |
4533b847 | 800 | pim_delete_tracked_nexthop(pim, &nht_p, NULL, rp_info, false); |
d62a17ae | 801 | |
e691f179 DS |
802 | if (!str2prefix("224.0.0.0/4", &g_all)) |
803 | return PIM_RP_BAD_ADDRESS; | |
804 | ||
d9c9a9ee | 805 | rp_all = pim_rp_find_match_group(pim, &g_all); |
d62a17ae | 806 | |
807 | if (rp_all == rp_info) { | |
8cfd7268 SP |
808 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, up)) { |
809 | /* Find the upstream (*, G) whose upstream address is | |
810 | * same as the deleted RP | |
811 | */ | |
d0e418b4 | 812 | if ((up->upstream_addr.s_addr |
813 | == rp_info->rp.rpf_addr.u.prefix4.s_addr) | |
814 | && (up->sg.src.s_addr == INADDR_ANY)) { | |
8cfd7268 SP |
815 | struct prefix grp; |
816 | grp.family = AF_INET; | |
817 | grp.prefixlen = IPV4_MAX_BITLEN; | |
818 | grp.u.prefix4 = up->sg.grp; | |
819 | trp_info = pim_rp_find_match_group(pim, &grp); | |
820 | if (trp_info == rp_all) { | |
821 | pim_upstream_rpf_clear(pim, up); | |
822 | up->upstream_addr.s_addr = INADDR_ANY; | |
823 | } | |
824 | } | |
825 | } | |
d62a17ae | 826 | rp_all->rp.rpf_addr.family = AF_INET; |
827 | rp_all->rp.rpf_addr.u.prefix4.s_addr = INADDR_NONE; | |
828 | rp_all->i_am_rp = 0; | |
829 | return PIM_SUCCESS; | |
830 | } | |
831 | ||
d9c9a9ee | 832 | listnode_delete(pim->rp_list, rp_info); |
89b68082 DS |
833 | |
834 | if (!was_plist) { | |
835 | rn = route_node_get(pim->rp_table, &rp_info->group); | |
836 | if (rn) { | |
837 | if (rn->info != rp_info) | |
af4c2728 | 838 | flog_err( |
450971aa | 839 | EC_LIB_DEVELOPMENT, |
3613d898 | 840 | "Expected rn->info to be equal to rp_info"); |
89b68082 DS |
841 | |
842 | if (PIM_DEBUG_TRACE) { | |
843 | char buf[PREFIX_STRLEN]; | |
844 | ||
996c9314 LB |
845 | zlog_debug( |
846 | "%s:Found for Freeing: %p for rp_info: %p(%s) Lock: %d", | |
847 | __PRETTY_FUNCTION__, rn, rp_info, | |
848 | prefix2str(&rp_info->group, buf, | |
849 | sizeof(buf)), | |
850 | rn->lock); | |
89b68082 DS |
851 | } |
852 | rn->info = NULL; | |
853 | route_unlock_node(rn); | |
854 | route_unlock_node(rn); | |
855 | } | |
856 | } | |
857 | ||
472ad383 | 858 | pim_rp_refresh_group_to_rp_mapping(pim); |
093c928f | 859 | |
8cfd7268 SP |
860 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, up)) { |
861 | /* Find the upstream (*, G) whose upstream address is same as | |
862 | * the deleted RP | |
863 | */ | |
d0e418b4 | 864 | if ((up->upstream_addr.s_addr |
865 | == rp_info->rp.rpf_addr.u.prefix4.s_addr) | |
866 | && (up->sg.src.s_addr == INADDR_ANY)) { | |
8cfd7268 SP |
867 | struct prefix grp; |
868 | ||
869 | grp.family = AF_INET; | |
870 | grp.prefixlen = IPV4_MAX_BITLEN; | |
871 | grp.u.prefix4 = up->sg.grp; | |
872 | ||
873 | trp_info = pim_rp_find_match_group(pim, &grp); | |
874 | ||
875 | /* RP not found for the group grp */ | |
876 | if (pim_rpf_addr_is_inaddr_none(&trp_info->rp)) { | |
877 | pim_upstream_rpf_clear(pim, up); | |
d0e418b4 | 878 | pim_rp_set_upstream_addr( |
879 | pim, &up->upstream_addr, up->sg.src, | |
880 | up->sg.grp); | |
8cfd7268 SP |
881 | } |
882 | ||
883 | /* RP found for the group grp */ | |
884 | else | |
885 | pim_upstream_update(pim, up); | |
886 | } | |
887 | } | |
888 | ||
093c928f | 889 | XFREE(MTYPE_PIM_RP, rp_info); |
d62a17ae | 890 | return PIM_SUCCESS; |
75a26779 | 891 | } |
13afbd05 | 892 | |
d0e418b4 | 893 | int pim_rp_change(struct pim_instance *pim, struct in_addr new_rp_addr, |
894 | struct prefix group, enum rp_source rp_src_flag) | |
895 | { | |
896 | struct prefix nht_p; | |
897 | struct route_node *rn; | |
898 | int result = 0; | |
899 | struct rp_info *rp_info = NULL; | |
900 | struct pim_upstream *up; | |
901 | struct listnode *upnode; | |
902 | ||
903 | rn = route_node_lookup(pim->rp_table, &group); | |
904 | if (!rn) { | |
905 | result = pim_rp_new(pim, new_rp_addr, group, NULL, rp_src_flag); | |
906 | return result; | |
907 | } | |
908 | ||
909 | rp_info = rn->info; | |
910 | ||
911 | if (!rp_info) { | |
912 | route_unlock_node(rn); | |
913 | result = pim_rp_new(pim, new_rp_addr, group, NULL, rp_src_flag); | |
914 | return result; | |
915 | } | |
916 | ||
917 | if (rp_info->rp.rpf_addr.u.prefix4.s_addr == new_rp_addr.s_addr) { | |
918 | if (rp_info->rp_src != rp_src_flag) { | |
919 | rp_info->rp_src = rp_src_flag; | |
920 | route_unlock_node(rn); | |
921 | return PIM_SUCCESS; | |
922 | } | |
923 | } | |
924 | ||
925 | /* Deregister old RP addr with Zebra NHT */ | |
926 | if (rp_info->rp.rpf_addr.u.prefix4.s_addr != INADDR_ANY) { | |
927 | nht_p.family = AF_INET; | |
928 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
929 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
930 | if (PIM_DEBUG_PIM_NHT_RP) { | |
931 | char buf[PREFIX2STR_BUFFER]; | |
932 | ||
933 | prefix2str(&nht_p, buf, sizeof(buf)); | |
934 | zlog_debug("%s: Deregister RP addr %s with Zebra ", | |
935 | __PRETTY_FUNCTION__, buf); | |
936 | } | |
937 | pim_delete_tracked_nexthop(pim, &nht_p, NULL, rp_info, false); | |
938 | } | |
939 | ||
940 | pim_rp_nexthop_del(rp_info); | |
941 | listnode_delete(pim->rp_list, rp_info); | |
942 | /* Update the new RP address*/ | |
943 | rp_info->rp.rpf_addr.u.prefix4 = new_rp_addr; | |
944 | rp_info->rp_src = rp_src_flag; | |
945 | rp_info->i_am_rp = 0; | |
946 | ||
947 | listnode_add_sort(pim->rp_list, rp_info); | |
948 | ||
949 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, up)) { | |
950 | if (up->sg.src.s_addr == INADDR_ANY) { | |
951 | struct prefix grp; | |
952 | struct rp_info *trp_info; | |
953 | ||
954 | grp.family = AF_INET; | |
955 | grp.prefixlen = IPV4_MAX_BITLEN; | |
956 | grp.u.prefix4 = up->sg.grp; | |
957 | trp_info = pim_rp_find_match_group(pim, &grp); | |
958 | ||
959 | if (trp_info == rp_info) | |
960 | pim_upstream_update(pim, up); | |
961 | } | |
962 | } | |
963 | ||
964 | /* Register new RP addr with Zebra NHT */ | |
965 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
966 | if (PIM_DEBUG_PIM_NHT_RP) { | |
967 | char buf[PREFIX2STR_BUFFER]; | |
968 | char buf1[PREFIX2STR_BUFFER]; | |
969 | ||
970 | prefix2str(&nht_p, buf, sizeof(buf)); | |
971 | prefix2str(&rp_info->group, buf1, sizeof(buf1)); | |
972 | zlog_debug("%s: NHT Register RP addr %s grp %s with Zebra ", | |
973 | __PRETTY_FUNCTION__, buf, buf1); | |
974 | } | |
975 | ||
976 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, false, NULL); | |
977 | if (!pim_ecmp_nexthop_lookup(pim, &rp_info->rp.source_nexthop, &nht_p, | |
978 | &rp_info->group, 1)) { | |
979 | route_unlock_node(rn); | |
980 | return PIM_RP_NO_PATH; | |
981 | } | |
982 | ||
983 | pim_rp_check_interfaces(pim, rp_info); | |
984 | ||
985 | route_unlock_node(rn); | |
986 | ||
987 | pim_rp_refresh_group_to_rp_mapping(pim); | |
988 | ||
989 | return result; | |
990 | } | |
991 | ||
fec883d9 | 992 | void pim_rp_setup(struct pim_instance *pim) |
13afbd05 | 993 | { |
d62a17ae | 994 | struct listnode *node; |
995 | struct rp_info *rp_info; | |
d62a17ae | 996 | struct prefix nht_p; |
d62a17ae | 997 | |
d9c9a9ee | 998 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 999 | if (rp_info->rp.rpf_addr.u.prefix4.s_addr == INADDR_NONE) |
1000 | continue; | |
1001 | ||
1002 | nht_p.family = AF_INET; | |
1003 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
1004 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
8cfd7268 | 1005 | |
4533b847 | 1006 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, false, |
1007 | NULL); | |
43763b11 DS |
1008 | if (!pim_ecmp_nexthop_lookup(pim, &rp_info->rp.source_nexthop, |
1009 | &nht_p, &rp_info->group, 1)) | |
1010 | if (PIM_DEBUG_PIM_NHT_RP) | |
d62a17ae | 1011 | zlog_debug( |
43763b11 | 1012 | "Unable to lookup nexthop for rp specified"); |
d62a17ae | 1013 | } |
13afbd05 DS |
1014 | } |
1015 | ||
54b97c74 | 1016 | /* |
7176984f | 1017 | * Checks to see if we should elect ourself the actual RP when new if |
1018 | * addresses are added against an interface. | |
54b97c74 | 1019 | */ |
d62a17ae | 1020 | void pim_rp_check_on_if_add(struct pim_interface *pim_ifp) |
54b97c74 | 1021 | { |
d62a17ae | 1022 | struct listnode *node; |
1023 | struct rp_info *rp_info; | |
1024 | bool i_am_rp_changed = false; | |
d9c9a9ee | 1025 | struct pim_instance *pim = pim_ifp->pim; |
d62a17ae | 1026 | |
d9c9a9ee | 1027 | if (pim->rp_list == NULL) |
d62a17ae | 1028 | return; |
1029 | ||
d9c9a9ee | 1030 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 1031 | if (pim_rpf_addr_is_inaddr_none(&rp_info->rp)) |
1032 | continue; | |
1033 | ||
1034 | /* if i_am_rp is already set nothing to be done (adding new | |
1035 | * addresses | |
1036 | * is not going to make a difference). */ | |
1037 | if (rp_info->i_am_rp) { | |
1038 | continue; | |
1039 | } | |
1040 | ||
1041 | if (pim_rp_check_interface_addrs(rp_info, pim_ifp)) { | |
1042 | i_am_rp_changed = true; | |
1043 | rp_info->i_am_rp = 1; | |
3d225d48 | 1044 | if (PIM_DEBUG_PIM_NHT_RP) { |
d62a17ae | 1045 | char rp[PREFIX_STRLEN]; |
1046 | pim_addr_dump("<rp?>", &rp_info->rp.rpf_addr, | |
1047 | rp, sizeof(rp)); | |
1048 | zlog_debug("%s: %s: i am rp", __func__, rp); | |
1049 | } | |
1050 | } | |
1051 | } | |
1052 | ||
1053 | if (i_am_rp_changed) { | |
472ad383 | 1054 | pim_msdp_i_am_rp_changed(pim); |
d62a17ae | 1055 | } |
7176984f | 1056 | } |
36d6bd7d | 1057 | |
7176984f | 1058 | /* up-optimized re-evaluation of "i_am_rp". this is used when ifaddresses |
1059 | * are removed. Removing numbers is an uncommon event in an active network | |
1060 | * so I have made no attempt to optimize it. */ | |
fec883d9 | 1061 | void pim_i_am_rp_re_evaluate(struct pim_instance *pim) |
7176984f | 1062 | { |
d62a17ae | 1063 | struct listnode *node; |
1064 | struct rp_info *rp_info; | |
1065 | bool i_am_rp_changed = false; | |
1066 | int old_i_am_rp; | |
1067 | ||
d9c9a9ee | 1068 | if (pim->rp_list == NULL) |
d62a17ae | 1069 | return; |
1070 | ||
d9c9a9ee | 1071 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 1072 | if (pim_rpf_addr_is_inaddr_none(&rp_info->rp)) |
1073 | continue; | |
1074 | ||
1075 | old_i_am_rp = rp_info->i_am_rp; | |
fec883d9 | 1076 | pim_rp_check_interfaces(pim, rp_info); |
d62a17ae | 1077 | |
1078 | if (old_i_am_rp != rp_info->i_am_rp) { | |
1079 | i_am_rp_changed = true; | |
3d225d48 | 1080 | if (PIM_DEBUG_PIM_NHT_RP) { |
d62a17ae | 1081 | char rp[PREFIX_STRLEN]; |
1082 | pim_addr_dump("<rp?>", &rp_info->rp.rpf_addr, | |
1083 | rp, sizeof(rp)); | |
1084 | if (rp_info->i_am_rp) { | |
1085 | zlog_debug("%s: %s: i am rp", __func__, | |
1086 | rp); | |
1087 | } else { | |
1088 | zlog_debug("%s: %s: i am no longer rp", | |
1089 | __func__, rp); | |
1090 | } | |
1091 | } | |
1092 | } | |
1093 | } | |
1094 | ||
1095 | if (i_am_rp_changed) { | |
472ad383 | 1096 | pim_msdp_i_am_rp_changed(pim); |
d62a17ae | 1097 | } |
54b97c74 DS |
1098 | } |
1099 | ||
1100 | /* | |
1101 | * I_am_RP(G) is true if the group-to-RP mapping indicates that | |
1102 | * this router is the RP for the group. | |
1103 | * | |
1104 | * Since we only have static RP, all groups are part of this RP | |
1105 | */ | |
d9c9a9ee | 1106 | int pim_rp_i_am_rp(struct pim_instance *pim, struct in_addr group) |
54b97c74 | 1107 | { |
d62a17ae | 1108 | struct prefix g; |
1109 | struct rp_info *rp_info; | |
36d6bd7d | 1110 | |
d62a17ae | 1111 | memset(&g, 0, sizeof(g)); |
1112 | g.family = AF_INET; | |
1113 | g.prefixlen = 32; | |
1114 | g.u.prefix4 = group; | |
36d6bd7d | 1115 | |
d9c9a9ee | 1116 | rp_info = pim_rp_find_match_group(pim, &g); |
36d6bd7d | 1117 | |
d62a17ae | 1118 | if (rp_info) |
1119 | return rp_info->i_am_rp; | |
36d6bd7d | 1120 | |
d62a17ae | 1121 | return 0; |
54b97c74 DS |
1122 | } |
1123 | ||
71694057 DS |
1124 | /* |
1125 | * RP(G) | |
1126 | * | |
1127 | * Return the RP that the Group belongs too. | |
1128 | */ | |
fec883d9 | 1129 | struct pim_rpf *pim_rp_g(struct pim_instance *pim, struct in_addr group) |
71694057 | 1130 | { |
d62a17ae | 1131 | struct prefix g; |
1132 | struct rp_info *rp_info; | |
1133 | ||
1134 | memset(&g, 0, sizeof(g)); | |
1135 | g.family = AF_INET; | |
1136 | g.prefixlen = 32; | |
1137 | g.u.prefix4 = group; | |
1138 | ||
d9c9a9ee | 1139 | rp_info = pim_rp_find_match_group(pim, &g); |
d62a17ae | 1140 | |
1141 | if (rp_info) { | |
1142 | struct prefix nht_p; | |
43763b11 | 1143 | |
d62a17ae | 1144 | /* Register addr with Zebra NHT */ |
1145 | nht_p.family = AF_INET; | |
1146 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
1147 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
3d225d48 | 1148 | if (PIM_DEBUG_PIM_NHT_RP) { |
d62a17ae | 1149 | char buf[PREFIX2STR_BUFFER]; |
1150 | char buf1[PREFIX2STR_BUFFER]; | |
1151 | prefix2str(&nht_p, buf, sizeof(buf)); | |
1152 | prefix2str(&rp_info->group, buf1, sizeof(buf1)); | |
1153 | zlog_debug( | |
1154 | "%s: NHT Register RP addr %s grp %s with Zebra", | |
1155 | __PRETTY_FUNCTION__, buf, buf1); | |
1156 | } | |
4533b847 | 1157 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, false, |
1158 | NULL); | |
43763b11 DS |
1159 | pim_rpf_set_refresh_time(pim); |
1160 | (void)pim_ecmp_nexthop_lookup(pim, &rp_info->rp.source_nexthop, | |
1161 | &nht_p, &rp_info->group, 1); | |
d62a17ae | 1162 | return (&rp_info->rp); |
1163 | } | |
1164 | ||
1165 | // About to Go Down | |
1166 | return NULL; | |
71694057 DS |
1167 | } |
1168 | ||
8f5f5e91 DS |
1169 | /* |
1170 | * Set the upstream IP address we want to talk to based upon | |
1171 | * the rp configured and the source address | |
1172 | * | |
1173 | * If we have don't have a RP configured and the source address is * | |
732c209c | 1174 | * then set the upstream addr as INADDR_ANY and return failure. |
8f5f5e91 DS |
1175 | * |
1176 | */ | |
d9c9a9ee DS |
1177 | int pim_rp_set_upstream_addr(struct pim_instance *pim, struct in_addr *up, |
1178 | struct in_addr source, struct in_addr group) | |
8f5f5e91 | 1179 | { |
d62a17ae | 1180 | struct rp_info *rp_info; |
1181 | struct prefix g; | |
36d6bd7d | 1182 | |
d62a17ae | 1183 | memset(&g, 0, sizeof(g)); |
1184 | g.family = AF_INET; | |
1185 | g.prefixlen = 32; | |
1186 | g.u.prefix4 = group; | |
36d6bd7d | 1187 | |
d9c9a9ee | 1188 | rp_info = pim_rp_find_match_group(pim, &g); |
36d6bd7d | 1189 | |
d62a17ae | 1190 | if ((pim_rpf_addr_is_inaddr_none(&rp_info->rp)) |
1191 | && (source.s_addr == INADDR_ANY)) { | |
3d225d48 | 1192 | if (PIM_DEBUG_PIM_NHT_RP) |
d62a17ae | 1193 | zlog_debug("%s: Received a (*,G) with no RP configured", |
1194 | __PRETTY_FUNCTION__); | |
732c209c | 1195 | up->s_addr = INADDR_ANY; |
d62a17ae | 1196 | return 0; |
1197 | } | |
8f5f5e91 | 1198 | |
d62a17ae | 1199 | *up = (source.s_addr == INADDR_ANY) ? rp_info->rp.rpf_addr.u.prefix4 |
1200 | : source; | |
8f5f5e91 | 1201 | |
d62a17ae | 1202 | return 1; |
8f5f5e91 | 1203 | } |
75a26779 | 1204 | |
0c8b717e DS |
1205 | int pim_rp_config_write(struct pim_instance *pim, struct vty *vty, |
1206 | const char *spaces) | |
75a26779 | 1207 | { |
d62a17ae | 1208 | struct listnode *node; |
1209 | struct rp_info *rp_info; | |
1210 | char rp_buffer[32]; | |
1211 | char group_buffer[32]; | |
1212 | int count = 0; | |
1213 | ||
d9c9a9ee | 1214 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 1215 | if (pim_rpf_addr_is_inaddr_none(&rp_info->rp)) |
1216 | continue; | |
1217 | ||
d0e418b4 | 1218 | if (rp_info->rp_src == RP_SRC_BSR) |
1219 | continue; | |
1220 | ||
d62a17ae | 1221 | if (rp_info->plist) |
0c8b717e | 1222 | vty_out(vty, "%sip pim rp %s prefix-list %s\n", spaces, |
d62a17ae | 1223 | inet_ntop(AF_INET, |
1224 | &rp_info->rp.rpf_addr.u.prefix4, | |
1225 | rp_buffer, 32), | |
1226 | rp_info->plist); | |
1227 | else | |
0c8b717e | 1228 | vty_out(vty, "%sip pim rp %s %s\n", spaces, |
d62a17ae | 1229 | inet_ntop(AF_INET, |
1230 | &rp_info->rp.rpf_addr.u.prefix4, | |
1231 | rp_buffer, 32), | |
1232 | prefix2str(&rp_info->group, group_buffer, 32)); | |
1233 | count++; | |
1234 | } | |
1235 | ||
1236 | return count; | |
75a26779 DS |
1237 | } |
1238 | ||
f43593d9 DS |
1239 | bool pim_rp_check_is_my_ip_address(struct pim_instance *pim, |
1240 | struct in_addr dest_addr) | |
75a26779 | 1241 | { |
fec883d9 | 1242 | if (if_lookup_exact_address(&dest_addr, AF_INET, pim->vrf_id)) |
f43593d9 | 1243 | return true; |
d62a17ae | 1244 | |
f43593d9 | 1245 | return false; |
75a26779 | 1246 | } |
00d07c6f | 1247 | |
088f1098 | 1248 | void pim_rp_show_information(struct pim_instance *pim, struct vty *vty, bool uj) |
00d07c6f | 1249 | { |
d62a17ae | 1250 | struct rp_info *rp_info; |
1251 | struct rp_info *prev_rp_info = NULL; | |
1252 | struct listnode *node; | |
025725f7 | 1253 | char source[7]; |
d62a17ae | 1254 | |
1255 | json_object *json = NULL; | |
1256 | json_object *json_rp_rows = NULL; | |
1257 | json_object *json_row = NULL; | |
1258 | ||
1259 | if (uj) | |
1260 | json = json_object_new_object(); | |
1261 | else | |
1262 | vty_out(vty, | |
025725f7 | 1263 | "RP address group/prefix-list OIF I am RP Source\n"); |
d9c9a9ee | 1264 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 1265 | if (!pim_rpf_addr_is_inaddr_none(&rp_info->rp)) { |
1266 | char buf[48]; | |
1267 | ||
025725f7 | 1268 | if (rp_info->rp_src == RP_SRC_STATIC) |
1269 | strcpy(source, "Static"); | |
1270 | else if (rp_info->rp_src == RP_SRC_BSR) | |
1271 | strcpy(source, "BSR"); | |
1272 | else | |
1273 | strcpy(source, "None"); | |
d62a17ae | 1274 | if (uj) { |
1275 | /* | |
1276 | * If we have moved on to a new RP then add the | |
1277 | * entry for the previous RP | |
1278 | */ | |
1279 | if (prev_rp_info | |
1280 | && prev_rp_info->rp.rpf_addr.u.prefix4 | |
1281 | .s_addr | |
1282 | != rp_info->rp.rpf_addr.u.prefix4 | |
1283 | .s_addr) { | |
1284 | json_object_object_add( | |
1285 | json, | |
1286 | inet_ntoa(prev_rp_info->rp | |
1287 | .rpf_addr.u | |
1288 | .prefix4), | |
1289 | json_rp_rows); | |
1290 | json_rp_rows = NULL; | |
1291 | } | |
1292 | ||
1293 | if (!json_rp_rows) | |
1294 | json_rp_rows = json_object_new_array(); | |
1295 | ||
1296 | json_row = json_object_new_object(); | |
1297 | if (rp_info->rp.source_nexthop.interface) | |
1298 | json_object_string_add( | |
1299 | json_row, "outboundInterface", | |
1300 | rp_info->rp.source_nexthop | |
1301 | .interface->name); | |
1302 | ||
1303 | if (rp_info->i_am_rp) | |
1304 | json_object_boolean_true_add(json_row, | |
1305 | "iAmRP"); | |
1306 | ||
1307 | if (rp_info->plist) | |
1308 | json_object_string_add(json_row, | |
1309 | "prefixList", | |
1310 | rp_info->plist); | |
1311 | else | |
1312 | json_object_string_add( | |
1313 | json_row, "group", | |
1314 | prefix2str(&rp_info->group, buf, | |
1315 | 48)); | |
d0e418b4 | 1316 | json_object_string_add(json_row, "source", |
025725f7 | 1317 | source); |
d62a17ae | 1318 | |
1319 | json_object_array_add(json_rp_rows, json_row); | |
1320 | } else { | |
1321 | vty_out(vty, "%-15s ", | |
1322 | inet_ntoa(rp_info->rp.rpf_addr.u | |
1323 | .prefix4)); | |
1324 | ||
1325 | if (rp_info->plist) | |
1326 | vty_out(vty, "%-18s ", rp_info->plist); | |
1327 | else | |
1328 | vty_out(vty, "%-18s ", | |
1329 | prefix2str(&rp_info->group, buf, | |
1330 | 48)); | |
1331 | ||
1332 | if (rp_info->rp.source_nexthop.interface) | |
ff415346 | 1333 | vty_out(vty, "%-16s ", |
d62a17ae | 1334 | rp_info->rp.source_nexthop |
1335 | .interface->name); | |
1336 | else | |
ff415346 | 1337 | vty_out(vty, "%-16s ", "(Unknown)"); |
d62a17ae | 1338 | |
1339 | if (rp_info->i_am_rp) | |
1340 | vty_out(vty, "yes\n"); | |
1341 | else | |
025725f7 | 1342 | vty_out(vty, "no"); |
d62a17ae | 1343 | |
025725f7 | 1344 | vty_out(vty, "%14s\n", source); |
1345 | } | |
d62a17ae | 1346 | prev_rp_info = rp_info; |
1347 | } | |
1348 | } | |
1349 | ||
1350 | if (uj) { | |
1351 | if (prev_rp_info && json_rp_rows) | |
1352 | json_object_object_add( | |
1353 | json, | |
1354 | inet_ntoa(prev_rp_info->rp.rpf_addr.u.prefix4), | |
1355 | json_rp_rows); | |
1356 | ||
9d303b37 DL |
1357 | vty_out(vty, "%s\n", json_object_to_json_string_ext( |
1358 | json, JSON_C_TO_STRING_PRETTY)); | |
d62a17ae | 1359 | json_object_free(json); |
1360 | } | |
00d07c6f | 1361 | } |
cba44481 | 1362 | |
c9cd7fbc | 1363 | void pim_resolve_rp_nh(struct pim_instance *pim, struct pim_neighbor *nbr) |
cba44481 | 1364 | { |
d62a17ae | 1365 | struct listnode *node = NULL; |
1366 | struct rp_info *rp_info = NULL; | |
1367 | struct nexthop *nh_node = NULL; | |
1368 | struct prefix nht_p; | |
1369 | struct pim_nexthop_cache pnc; | |
d62a17ae | 1370 | |
d9c9a9ee | 1371 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 1372 | if (rp_info->rp.rpf_addr.u.prefix4.s_addr == INADDR_NONE) |
1373 | continue; | |
1374 | ||
1375 | nht_p.family = AF_INET; | |
1376 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
1377 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
1378 | memset(&pnc, 0, sizeof(struct pim_nexthop_cache)); | |
fec883d9 | 1379 | if (!pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, |
4533b847 | 1380 | false, &pnc)) |
cb9c7c50 DS |
1381 | continue; |
1382 | ||
1383 | for (nh_node = pnc.nexthop; nh_node; nh_node = nh_node->next) { | |
1384 | if (nh_node->gate.ipv4.s_addr != 0) | |
1385 | continue; | |
1386 | ||
1387 | struct interface *ifp1 = if_lookup_by_index( | |
fec883d9 | 1388 | nh_node->ifindex, pim->vrf_id); |
c9cd7fbc DS |
1389 | |
1390 | if (nbr->interface != ifp1) | |
cb9c7c50 DS |
1391 | continue; |
1392 | ||
1393 | nh_node->gate.ipv4 = nbr->source_addr; | |
3d225d48 | 1394 | if (PIM_DEBUG_PIM_NHT_RP) { |
cb9c7c50 DS |
1395 | char str[PREFIX_STRLEN]; |
1396 | char str1[INET_ADDRSTRLEN]; | |
1397 | pim_inet4_dump("<nht_nbr?>", nbr->source_addr, | |
1398 | str1, sizeof(str1)); | |
1399 | pim_addr_dump("<nht_addr?>", &nht_p, str, | |
1400 | sizeof(str)); | |
1401 | zlog_debug( | |
1402 | "%s: addr %s new nexthop addr %s interface %s", | |
1403 | __PRETTY_FUNCTION__, str, str1, | |
1404 | ifp1->name); | |
d62a17ae | 1405 | } |
1406 | } | |
1407 | } | |
cba44481 | 1408 | } |