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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 | 133 | rn->info = rp_info; |
23fc858a | 134 | if (PIM_DEBUG_PIM_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; | |
23fc858a | 248 | if (PIM_DEBUG_PIM_TRACE) { |
89b68082 DS |
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); |
a749b900 | 277 | pim_upstream_reeval_use_rpt(pim); |
dfe43e25 DW |
278 | } |
279 | ||
d9c9a9ee DS |
280 | void pim_rp_prefix_list_update(struct pim_instance *pim, |
281 | struct prefix_list *plist) | |
dfe43e25 | 282 | { |
d62a17ae | 283 | struct listnode *node; |
284 | struct rp_info *rp_info; | |
285 | int refresh_needed = 0; | |
286 | ||
d9c9a9ee | 287 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 288 | if (rp_info->plist |
289 | && strcmp(rp_info->plist, prefix_list_name(plist)) == 0) { | |
290 | refresh_needed = 1; | |
291 | break; | |
292 | } | |
293 | } | |
294 | ||
295 | if (refresh_needed) | |
472ad383 | 296 | pim_rp_refresh_group_to_rp_mapping(pim); |
dfe43e25 DW |
297 | } |
298 | ||
d62a17ae | 299 | static int pim_rp_check_interface_addrs(struct rp_info *rp_info, |
300 | struct pim_interface *pim_ifp) | |
7176984f | 301 | { |
d62a17ae | 302 | struct listnode *node; |
303 | struct pim_secondary_addr *sec_addr; | |
7176984f | 304 | |
d62a17ae | 305 | if (pim_ifp->primary_address.s_addr |
306 | == rp_info->rp.rpf_addr.u.prefix4.s_addr) | |
307 | return 1; | |
7176984f | 308 | |
d62a17ae | 309 | if (!pim_ifp->sec_addr_list) { |
310 | return 0; | |
311 | } | |
7176984f | 312 | |
d62a17ae | 313 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->sec_addr_list, node, sec_addr)) { |
314 | if (prefix_same(&sec_addr->addr, &rp_info->rp.rpf_addr)) { | |
315 | return 1; | |
316 | } | |
317 | } | |
7176984f | 318 | |
d62a17ae | 319 | return 0; |
7176984f | 320 | } |
321 | ||
fec883d9 DS |
322 | static void pim_rp_check_interfaces(struct pim_instance *pim, |
323 | struct rp_info *rp_info) | |
00d07c6f | 324 | { |
d62a17ae | 325 | struct interface *ifp; |
00d07c6f | 326 | |
d62a17ae | 327 | rp_info->i_am_rp = 0; |
451fda4f | 328 | FOR_ALL_INTERFACES (pim->vrf, ifp) { |
d62a17ae | 329 | struct pim_interface *pim_ifp = ifp->info; |
00d07c6f | 330 | |
d62a17ae | 331 | if (!pim_ifp) |
332 | continue; | |
00d07c6f | 333 | |
d62a17ae | 334 | if (pim_rp_check_interface_addrs(rp_info, pim_ifp)) { |
335 | rp_info->i_am_rp = 1; | |
336 | } | |
337 | } | |
00d07c6f DS |
338 | } |
339 | ||
28309df0 SP |
340 | void pim_upstream_update(struct pim_instance *pim, struct pim_upstream *up) |
341 | { | |
342 | struct pim_rpf old_rpf; | |
343 | enum pim_rpf_result rpf_result; | |
344 | struct in_addr old_upstream_addr; | |
345 | struct in_addr new_upstream_addr; | |
346 | struct prefix nht_p; | |
347 | ||
348 | old_upstream_addr = up->upstream_addr; | |
349 | pim_rp_set_upstream_addr(pim, &new_upstream_addr, up->sg.src, | |
350 | up->sg.grp); | |
351 | ||
23fc858a | 352 | if (PIM_DEBUG_PIM_TRACE) |
28309df0 SP |
353 | zlog_debug("%s: pim upstream update for old upstream %s", |
354 | __PRETTY_FUNCTION__, | |
355 | inet_ntoa(old_upstream_addr)); | |
356 | ||
357 | if (old_upstream_addr.s_addr == new_upstream_addr.s_addr) | |
358 | return; | |
359 | ||
360 | /* Lets consider a case, where a PIM upstream has a better RP as a | |
361 | * result of a new RP configuration with more precise group range. | |
362 | * This upstream has to be added to the upstream hash of new RP's | |
363 | * NHT(pnc) and has to be removed from old RP's NHT upstream hash | |
364 | */ | |
365 | if (old_upstream_addr.s_addr != INADDR_ANY) { | |
366 | /* Deregister addr with Zebra NHT */ | |
367 | nht_p.family = AF_INET; | |
368 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
369 | nht_p.u.prefix4 = old_upstream_addr; | |
23fc858a | 370 | if (PIM_DEBUG_PIM_TRACE) { |
28309df0 SP |
371 | char buf[PREFIX2STR_BUFFER]; |
372 | ||
373 | prefix2str(&nht_p, buf, sizeof(buf)); | |
374 | zlog_debug("%s: Deregister upstream %s addr %s with Zebra NHT", | |
375 | __PRETTY_FUNCTION__, up->sg_str, buf); | |
376 | } | |
4533b847 | 377 | pim_delete_tracked_nexthop(pim, &nht_p, up, NULL, false); |
28309df0 SP |
378 | } |
379 | ||
380 | /* Update the upstream address */ | |
381 | up->upstream_addr = new_upstream_addr; | |
382 | ||
383 | old_rpf.source_nexthop.interface = up->rpf.source_nexthop.interface; | |
384 | ||
8c55c132 | 385 | rpf_result = pim_rpf_update(pim, up, &old_rpf, __func__); |
28309df0 SP |
386 | if (rpf_result == PIM_RPF_FAILURE) |
387 | pim_mroute_del(up->channel_oil, __PRETTY_FUNCTION__); | |
388 | ||
389 | /* update kernel multicast forwarding cache (MFC) */ | |
7984af18 AK |
390 | if (up->rpf.source_nexthop.interface && up->channel_oil) |
391 | pim_upstream_mroute_iif_update(up->channel_oil, __func__); | |
28309df0 | 392 | |
b36576e4 AK |
393 | if (rpf_result == PIM_RPF_CHANGED || |
394 | (rpf_result == PIM_RPF_FAILURE && | |
395 | old_rpf.source_nexthop.interface)) | |
28309df0 SP |
396 | pim_zebra_upstream_rpf_changed(pim, up, &old_rpf); |
397 | ||
398 | pim_zebra_update_all_interfaces(pim); | |
399 | } | |
400 | ||
d0e418b4 | 401 | int pim_rp_new_config(struct pim_instance *pim, const char *rp, |
402 | const char *group_range, const char *plist) | |
75a26779 | 403 | { |
d62a17ae | 404 | int result = 0; |
d0e418b4 | 405 | struct prefix group; |
406 | struct in_addr rp_addr; | |
407 | ||
408 | if (group_range == NULL) | |
409 | result = str2prefix("224.0.0.0/4", &group); | |
410 | else { | |
411 | result = str2prefix(group_range, &group); | |
412 | if (result) { | |
413 | struct prefix temp; | |
414 | ||
415 | prefix_copy(&temp, &group); | |
416 | apply_mask(&temp); | |
417 | if (!prefix_same(&group, &temp)) | |
418 | return PIM_GROUP_BAD_ADDR_MASK_COMBO; | |
419 | } | |
420 | } | |
421 | ||
422 | if (!result) | |
423 | return PIM_GROUP_BAD_ADDRESS; | |
424 | ||
425 | result = inet_pton(AF_INET, rp, &rp_addr); | |
426 | ||
427 | if (result <= 0) | |
428 | return PIM_RP_BAD_ADDRESS; | |
429 | ||
430 | result = pim_rp_new(pim, rp_addr, group, plist, RP_SRC_STATIC); | |
431 | return result; | |
432 | } | |
433 | ||
434 | int pim_rp_new(struct pim_instance *pim, struct in_addr rp_addr, | |
435 | struct prefix group, const char *plist, | |
436 | enum rp_source rp_src_flag) | |
437 | { | |
438 | int result = 0; | |
439 | char rp[INET_ADDRSTRLEN]; | |
d62a17ae | 440 | struct rp_info *rp_info; |
441 | struct rp_info *rp_all; | |
442 | struct prefix group_all; | |
443 | struct listnode *node, *nnode; | |
444 | struct rp_info *tmp_rp_info; | |
445 | char buffer[BUFSIZ]; | |
446 | struct prefix nht_p; | |
89b68082 | 447 | struct route_node *rn; |
28309df0 | 448 | struct pim_upstream *up; |
d62a17ae | 449 | |
1e0d1c25 DS |
450 | if (rp_addr.s_addr == INADDR_ANY || |
451 | rp_addr.s_addr == INADDR_NONE) | |
452 | return PIM_RP_BAD_ADDRESS; | |
453 | ||
d62a17ae | 454 | rp_info = XCALLOC(MTYPE_PIM_RP, sizeof(*rp_info)); |
d62a17ae | 455 | |
d62a17ae | 456 | rp_info->rp.rpf_addr.family = AF_INET; |
457 | rp_info->rp.rpf_addr.prefixlen = IPV4_MAX_PREFIXLEN; | |
d0e418b4 | 458 | rp_info->rp.rpf_addr.u.prefix4 = rp_addr; |
459 | prefix_copy(&rp_info->group, &group); | |
460 | rp_info->rp_src = rp_src_flag; | |
d62a17ae | 461 | |
d0e418b4 | 462 | inet_ntop(AF_INET, &rp_info->rp.rpf_addr.u.prefix4, rp, sizeof(rp)); |
d62a17ae | 463 | |
464 | if (plist) { | |
465 | /* | |
466 | * Return if the prefix-list is already configured for this RP | |
467 | */ | |
d9c9a9ee | 468 | if (pim_rp_find_prefix_list(pim, rp_info->rp.rpf_addr.u.prefix4, |
d62a17ae | 469 | plist)) { |
470 | XFREE(MTYPE_PIM_RP, rp_info); | |
471 | return PIM_SUCCESS; | |
472 | } | |
473 | ||
474 | /* | |
475 | * Barf if the prefix-list is already configured for an RP | |
476 | */ | |
d9c9a9ee | 477 | if (pim_rp_prefix_list_used(pim, plist)) { |
d62a17ae | 478 | XFREE(MTYPE_PIM_RP, rp_info); |
479 | return PIM_RP_PFXLIST_IN_USE; | |
480 | } | |
481 | ||
482 | /* | |
483 | * Free any existing rp_info entries for this RP | |
484 | */ | |
d9c9a9ee | 485 | for (ALL_LIST_ELEMENTS(pim->rp_list, node, nnode, |
d62a17ae | 486 | tmp_rp_info)) { |
487 | if (rp_info->rp.rpf_addr.u.prefix4.s_addr | |
488 | == tmp_rp_info->rp.rpf_addr.u.prefix4.s_addr) { | |
489 | if (tmp_rp_info->plist) | |
d0e418b4 | 490 | pim_rp_del_config(pim, rp, NULL, |
491 | tmp_rp_info->plist); | |
d62a17ae | 492 | else |
d0e418b4 | 493 | pim_rp_del_config( |
fec883d9 | 494 | pim, rp, |
d62a17ae | 495 | prefix2str(&tmp_rp_info->group, |
496 | buffer, BUFSIZ), | |
497 | NULL); | |
498 | } | |
499 | } | |
500 | ||
501 | rp_info->plist = XSTRDUP(MTYPE_PIM_FILTER_NAME, plist); | |
502 | } else { | |
89b68082 | 503 | |
2e8345c1 DS |
504 | if (!str2prefix("224.0.0.0/4", &group_all)) { |
505 | XFREE(MTYPE_PIM_RP, rp_info); | |
506 | return PIM_GROUP_BAD_ADDRESS; | |
507 | } | |
d9c9a9ee | 508 | rp_all = pim_rp_find_match_group(pim, &group_all); |
d62a17ae | 509 | |
510 | /* | |
511 | * Barf if group is a non-multicast subnet | |
512 | */ | |
513 | if (!prefix_match(&rp_all->group, &rp_info->group)) { | |
514 | XFREE(MTYPE_PIM_RP, rp_info); | |
515 | return PIM_GROUP_BAD_ADDRESS; | |
516 | } | |
517 | ||
518 | /* | |
519 | * Remove any prefix-list rp_info entries for this RP | |
520 | */ | |
d9c9a9ee | 521 | for (ALL_LIST_ELEMENTS(pim->rp_list, node, nnode, |
d62a17ae | 522 | tmp_rp_info)) { |
523 | if (tmp_rp_info->plist | |
524 | && rp_info->rp.rpf_addr.u.prefix4.s_addr | |
525 | == tmp_rp_info->rp.rpf_addr.u.prefix4 | |
526 | .s_addr) { | |
d0e418b4 | 527 | pim_rp_del_config(pim, rp, NULL, |
528 | tmp_rp_info->plist); | |
d62a17ae | 529 | } |
530 | } | |
531 | ||
532 | /* | |
533 | * Take over the 224.0.0.0/4 group if the rp is INADDR_NONE | |
534 | */ | |
535 | if (prefix_same(&rp_all->group, &rp_info->group) | |
536 | && pim_rpf_addr_is_inaddr_none(&rp_all->rp)) { | |
537 | rp_all->rp.rpf_addr = rp_info->rp.rpf_addr; | |
d0e418b4 | 538 | rp_all->rp_src = rp_src_flag; |
d62a17ae | 539 | XFREE(MTYPE_PIM_RP, rp_info); |
540 | ||
541 | /* Register addr with Zebra NHT */ | |
542 | nht_p.family = AF_INET; | |
543 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
544 | nht_p.u.prefix4 = | |
545 | rp_all->rp.rpf_addr.u.prefix4; // RP address | |
3d225d48 | 546 | if (PIM_DEBUG_PIM_NHT_RP) { |
d62a17ae | 547 | char buf[PREFIX2STR_BUFFER]; |
548 | char buf1[PREFIX2STR_BUFFER]; | |
549 | prefix2str(&nht_p, buf, sizeof(buf)); | |
550 | prefix2str(&rp_all->group, buf1, sizeof(buf1)); | |
551 | zlog_debug( | |
552 | "%s: NHT Register rp_all addr %s grp %s ", | |
553 | __PRETTY_FUNCTION__, buf, buf1); | |
554 | } | |
28309df0 | 555 | |
dd3364cb | 556 | frr_each (rb_pim_upstream, &pim->upstream_head, up) { |
28309df0 SP |
557 | /* Find (*, G) upstream whose RP is not |
558 | * configured yet | |
559 | */ | |
560 | if ((up->upstream_addr.s_addr == INADDR_ANY) | |
561 | && (up->sg.src.s_addr == INADDR_ANY)) { | |
562 | struct prefix grp; | |
563 | struct rp_info *trp_info; | |
564 | ||
565 | grp.family = AF_INET; | |
566 | grp.prefixlen = IPV4_MAX_BITLEN; | |
567 | grp.u.prefix4 = up->sg.grp; | |
d0e418b4 | 568 | trp_info = pim_rp_find_match_group( |
569 | pim, &grp); | |
28309df0 SP |
570 | if (trp_info == rp_all) |
571 | pim_upstream_update(pim, up); | |
572 | } | |
573 | } | |
574 | ||
5bd51314 DS |
575 | pim_rp_check_interfaces(pim, rp_all); |
576 | pim_rp_refresh_group_to_rp_mapping(pim); | |
43763b11 | 577 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_all, |
4533b847 | 578 | false, NULL); |
579 | ||
43763b11 DS |
580 | if (!pim_ecmp_nexthop_lookup(pim, |
581 | &rp_all->rp.source_nexthop, | |
582 | &nht_p, &rp_all->group, 1)) | |
583 | return PIM_RP_NO_PATH; | |
d62a17ae | 584 | return PIM_SUCCESS; |
585 | } | |
586 | ||
587 | /* | |
588 | * Return if the group is already configured for this RP | |
589 | */ | |
d0e418b4 | 590 | tmp_rp_info = pim_rp_find_exact( |
591 | pim, rp_info->rp.rpf_addr.u.prefix4, &rp_info->group); | |
592 | if (tmp_rp_info) { | |
593 | if ((tmp_rp_info->rp_src != rp_src_flag) | |
594 | && (rp_src_flag == RP_SRC_STATIC)) | |
595 | tmp_rp_info->rp_src = rp_src_flag; | |
d62a17ae | 596 | XFREE(MTYPE_PIM_RP, rp_info); |
d0e418b4 | 597 | return result; |
d62a17ae | 598 | } |
599 | ||
600 | /* | |
601 | * Barf if this group is already covered by some other RP | |
602 | */ | |
d9c9a9ee | 603 | tmp_rp_info = pim_rp_find_match_group(pim, &rp_info->group); |
d62a17ae | 604 | |
605 | if (tmp_rp_info) { | |
606 | if (tmp_rp_info->plist) { | |
607 | XFREE(MTYPE_PIM_RP, rp_info); | |
608 | return PIM_GROUP_PFXLIST_OVERLAP; | |
609 | } else { | |
610 | /* | |
611 | * If the only RP that covers this group is an | |
612 | * RP configured for | |
613 | * 224.0.0.0/4 that is fine, ignore that one. | |
614 | * For all others | |
615 | * though we must return PIM_GROUP_OVERLAP | |
616 | */ | |
89b68082 DS |
617 | if (prefix_same(&rp_info->group, |
618 | &tmp_rp_info->group)) { | |
d0e418b4 | 619 | if ((rp_src_flag == RP_SRC_STATIC) |
620 | && (tmp_rp_info->rp_src | |
621 | == RP_SRC_STATIC)) { | |
622 | XFREE(MTYPE_PIM_RP, rp_info); | |
623 | return PIM_GROUP_OVERLAP; | |
624 | } | |
625 | ||
626 | result = pim_rp_change( | |
627 | pim, | |
628 | rp_info->rp.rpf_addr.u.prefix4, | |
629 | tmp_rp_info->group, | |
630 | rp_src_flag); | |
d62a17ae | 631 | XFREE(MTYPE_PIM_RP, rp_info); |
d0e418b4 | 632 | return result; |
d62a17ae | 633 | } |
634 | } | |
635 | } | |
636 | } | |
637 | ||
d9c9a9ee | 638 | listnode_add_sort(pim->rp_list, rp_info); |
89b68082 | 639 | rn = route_node_get(pim->rp_table, &rp_info->group); |
89b68082 DS |
640 | rn->info = rp_info; |
641 | ||
23fc858a | 642 | if (PIM_DEBUG_PIM_TRACE) { |
89b68082 DS |
643 | char buf[PREFIX_STRLEN]; |
644 | ||
996c9314 LB |
645 | zlog_debug("Allocated: %p for rp_info: %p(%s) Lock: %d", rn, |
646 | rp_info, | |
89b68082 DS |
647 | prefix2str(&rp_info->group, buf, sizeof(buf)), |
648 | rn->lock); | |
649 | } | |
d62a17ae | 650 | |
dd3364cb | 651 | frr_each (rb_pim_upstream, &pim->upstream_head, up) { |
28309df0 SP |
652 | if (up->sg.src.s_addr == INADDR_ANY) { |
653 | struct prefix grp; | |
654 | struct rp_info *trp_info; | |
655 | ||
656 | grp.family = AF_INET; | |
657 | grp.prefixlen = IPV4_MAX_BITLEN; | |
658 | grp.u.prefix4 = up->sg.grp; | |
659 | trp_info = pim_rp_find_match_group(pim, &grp); | |
660 | ||
661 | if (trp_info == rp_info) | |
662 | pim_upstream_update(pim, up); | |
663 | } | |
664 | } | |
665 | ||
5bd51314 DS |
666 | pim_rp_check_interfaces(pim, rp_info); |
667 | pim_rp_refresh_group_to_rp_mapping(pim); | |
668 | ||
d62a17ae | 669 | /* Register addr with Zebra NHT */ |
670 | nht_p.family = AF_INET; | |
671 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
672 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
3d225d48 | 673 | if (PIM_DEBUG_PIM_NHT_RP) { |
d62a17ae | 674 | char buf[PREFIX2STR_BUFFER]; |
675 | char buf1[PREFIX2STR_BUFFER]; | |
676 | prefix2str(&nht_p, buf, sizeof(buf)); | |
677 | prefix2str(&rp_info->group, buf1, sizeof(buf1)); | |
678 | zlog_debug("%s: NHT Register RP addr %s grp %s with Zebra ", | |
679 | __PRETTY_FUNCTION__, buf, buf1); | |
680 | } | |
4533b847 | 681 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, false, NULL); |
43763b11 DS |
682 | if (!pim_ecmp_nexthop_lookup(pim, &rp_info->rp.source_nexthop, &nht_p, |
683 | &rp_info->group, 1)) | |
684 | return PIM_RP_NO_PATH; | |
d62a17ae | 685 | |
d62a17ae | 686 | return PIM_SUCCESS; |
75a26779 DS |
687 | } |
688 | ||
d0e418b4 | 689 | int pim_rp_del_config(struct pim_instance *pim, const char *rp, |
690 | const char *group_range, const char *plist) | |
75a26779 | 691 | { |
d62a17ae | 692 | struct prefix group; |
693 | struct in_addr rp_addr; | |
d62a17ae | 694 | int result; |
d62a17ae | 695 | |
696 | if (group_range == NULL) | |
697 | result = str2prefix("224.0.0.0/4", &group); | |
698 | else | |
699 | result = str2prefix(group_range, &group); | |
700 | ||
701 | if (!result) | |
702 | return PIM_GROUP_BAD_ADDRESS; | |
703 | ||
704 | result = inet_pton(AF_INET, rp, &rp_addr); | |
705 | if (result <= 0) | |
706 | return PIM_RP_BAD_ADDRESS; | |
707 | ||
d0e418b4 | 708 | result = pim_rp_del(pim, rp_addr, group, plist, RP_SRC_STATIC); |
709 | return result; | |
710 | } | |
711 | ||
712 | int pim_rp_del(struct pim_instance *pim, struct in_addr rp_addr, | |
713 | struct prefix group, const char *plist, | |
714 | enum rp_source rp_src_flag) | |
715 | { | |
716 | struct prefix g_all; | |
717 | struct rp_info *rp_info; | |
718 | struct rp_info *rp_all; | |
719 | struct prefix nht_p; | |
720 | struct route_node *rn; | |
721 | bool was_plist = false; | |
722 | struct rp_info *trp_info; | |
723 | struct pim_upstream *up; | |
d0e418b4 | 724 | struct bsgrp_node *bsgrp = NULL; |
725 | struct bsm_rpinfo *bsrp = NULL; | |
726 | char grp_str[PREFIX2STR_BUFFER]; | |
727 | char rp_str[INET_ADDRSTRLEN]; | |
728 | ||
729 | if (!inet_ntop(AF_INET, &rp_addr, rp_str, sizeof(rp_str))) | |
730 | sprintf(rp_str, "<rp?>"); | |
731 | prefix2str(&group, grp_str, sizeof(grp_str)); | |
732 | ||
d62a17ae | 733 | if (plist) |
d9c9a9ee | 734 | rp_info = pim_rp_find_prefix_list(pim, rp_addr, plist); |
d62a17ae | 735 | else |
d9c9a9ee | 736 | rp_info = pim_rp_find_exact(pim, rp_addr, &group); |
d62a17ae | 737 | |
738 | if (!rp_info) | |
739 | return PIM_RP_NOT_FOUND; | |
740 | ||
741 | if (rp_info->plist) { | |
742 | XFREE(MTYPE_PIM_FILTER_NAME, rp_info->plist); | |
89b68082 | 743 | was_plist = true; |
d62a17ae | 744 | } |
745 | ||
23fc858a | 746 | if (PIM_DEBUG_PIM_TRACE) |
d0e418b4 | 747 | zlog_debug("%s: Delete RP %s for the group %s", |
748 | __PRETTY_FUNCTION__, rp_str, grp_str); | |
749 | ||
750 | /* While static RP is getting deleted, we need to check if dynamic RP | |
751 | * present for the same group in BSM RP table, then install the dynamic | |
752 | * RP for the group node into the main rp table | |
753 | */ | |
754 | if (rp_src_flag == RP_SRC_STATIC) { | |
755 | bsgrp = pim_bsm_get_bsgrp_node(&pim->global_scope, &group); | |
756 | ||
757 | if (bsgrp) { | |
758 | bsrp = listnode_head(bsgrp->bsrp_list); | |
759 | if (bsrp) { | |
23fc858a | 760 | if (PIM_DEBUG_PIM_TRACE) { |
d0e418b4 | 761 | char bsrp_str[INET_ADDRSTRLEN]; |
762 | ||
763 | if (!inet_ntop(AF_INET, bsrp, bsrp_str, | |
764 | sizeof(bsrp_str))) | |
765 | sprintf(bsrp_str, "<bsrp?>"); | |
766 | ||
767 | zlog_debug("%s: BSM RP %s found for the group %s", | |
768 | __PRETTY_FUNCTION__, | |
769 | bsrp_str, grp_str); | |
770 | } | |
771 | return pim_rp_change(pim, bsrp->rp_address, | |
772 | group, RP_SRC_BSR); | |
773 | } | |
774 | } else { | |
23fc858a | 775 | if (PIM_DEBUG_PIM_TRACE) |
d0e418b4 | 776 | zlog_debug( |
777 | "%s: BSM RP not found for the group %s", | |
778 | __PRETTY_FUNCTION__, grp_str); | |
779 | } | |
780 | } | |
781 | ||
d62a17ae | 782 | /* Deregister addr with Zebra NHT */ |
783 | nht_p.family = AF_INET; | |
784 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
785 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
3d225d48 | 786 | if (PIM_DEBUG_PIM_NHT_RP) { |
d62a17ae | 787 | char buf[PREFIX2STR_BUFFER]; |
788 | prefix2str(&nht_p, buf, sizeof(buf)); | |
789 | zlog_debug("%s: Deregister RP addr %s with Zebra ", | |
790 | __PRETTY_FUNCTION__, buf); | |
791 | } | |
4533b847 | 792 | pim_delete_tracked_nexthop(pim, &nht_p, NULL, rp_info, false); |
d62a17ae | 793 | |
e691f179 DS |
794 | if (!str2prefix("224.0.0.0/4", &g_all)) |
795 | return PIM_RP_BAD_ADDRESS; | |
796 | ||
d9c9a9ee | 797 | rp_all = pim_rp_find_match_group(pim, &g_all); |
d62a17ae | 798 | |
799 | if (rp_all == rp_info) { | |
dd3364cb | 800 | frr_each (rb_pim_upstream, &pim->upstream_head, up) { |
8cfd7268 SP |
801 | /* Find the upstream (*, G) whose upstream address is |
802 | * same as the deleted RP | |
803 | */ | |
d0e418b4 | 804 | if ((up->upstream_addr.s_addr |
805 | == rp_info->rp.rpf_addr.u.prefix4.s_addr) | |
806 | && (up->sg.src.s_addr == INADDR_ANY)) { | |
8cfd7268 SP |
807 | struct prefix grp; |
808 | grp.family = AF_INET; | |
809 | grp.prefixlen = IPV4_MAX_BITLEN; | |
810 | grp.u.prefix4 = up->sg.grp; | |
811 | trp_info = pim_rp_find_match_group(pim, &grp); | |
812 | if (trp_info == rp_all) { | |
813 | pim_upstream_rpf_clear(pim, up); | |
814 | up->upstream_addr.s_addr = INADDR_ANY; | |
815 | } | |
816 | } | |
817 | } | |
d62a17ae | 818 | rp_all->rp.rpf_addr.family = AF_INET; |
819 | rp_all->rp.rpf_addr.u.prefix4.s_addr = INADDR_NONE; | |
820 | rp_all->i_am_rp = 0; | |
821 | return PIM_SUCCESS; | |
822 | } | |
823 | ||
d9c9a9ee | 824 | listnode_delete(pim->rp_list, rp_info); |
89b68082 DS |
825 | |
826 | if (!was_plist) { | |
827 | rn = route_node_get(pim->rp_table, &rp_info->group); | |
828 | if (rn) { | |
829 | if (rn->info != rp_info) | |
af4c2728 | 830 | flog_err( |
450971aa | 831 | EC_LIB_DEVELOPMENT, |
3613d898 | 832 | "Expected rn->info to be equal to rp_info"); |
89b68082 | 833 | |
23fc858a | 834 | if (PIM_DEBUG_PIM_TRACE) { |
89b68082 DS |
835 | char buf[PREFIX_STRLEN]; |
836 | ||
996c9314 LB |
837 | zlog_debug( |
838 | "%s:Found for Freeing: %p for rp_info: %p(%s) Lock: %d", | |
839 | __PRETTY_FUNCTION__, rn, rp_info, | |
840 | prefix2str(&rp_info->group, buf, | |
841 | sizeof(buf)), | |
842 | rn->lock); | |
89b68082 DS |
843 | } |
844 | rn->info = NULL; | |
845 | route_unlock_node(rn); | |
846 | route_unlock_node(rn); | |
847 | } | |
848 | } | |
849 | ||
472ad383 | 850 | pim_rp_refresh_group_to_rp_mapping(pim); |
093c928f | 851 | |
dd3364cb | 852 | frr_each (rb_pim_upstream, &pim->upstream_head, up) { |
8cfd7268 SP |
853 | /* Find the upstream (*, G) whose upstream address is same as |
854 | * the deleted RP | |
855 | */ | |
d0e418b4 | 856 | if ((up->upstream_addr.s_addr |
857 | == rp_info->rp.rpf_addr.u.prefix4.s_addr) | |
858 | && (up->sg.src.s_addr == INADDR_ANY)) { | |
8cfd7268 SP |
859 | struct prefix grp; |
860 | ||
861 | grp.family = AF_INET; | |
862 | grp.prefixlen = IPV4_MAX_BITLEN; | |
863 | grp.u.prefix4 = up->sg.grp; | |
864 | ||
865 | trp_info = pim_rp_find_match_group(pim, &grp); | |
866 | ||
867 | /* RP not found for the group grp */ | |
868 | if (pim_rpf_addr_is_inaddr_none(&trp_info->rp)) { | |
869 | pim_upstream_rpf_clear(pim, up); | |
d0e418b4 | 870 | pim_rp_set_upstream_addr( |
871 | pim, &up->upstream_addr, up->sg.src, | |
872 | up->sg.grp); | |
8cfd7268 SP |
873 | } |
874 | ||
875 | /* RP found for the group grp */ | |
876 | else | |
877 | pim_upstream_update(pim, up); | |
878 | } | |
879 | } | |
880 | ||
093c928f | 881 | XFREE(MTYPE_PIM_RP, rp_info); |
d62a17ae | 882 | return PIM_SUCCESS; |
75a26779 | 883 | } |
13afbd05 | 884 | |
d0e418b4 | 885 | int pim_rp_change(struct pim_instance *pim, struct in_addr new_rp_addr, |
886 | struct prefix group, enum rp_source rp_src_flag) | |
887 | { | |
888 | struct prefix nht_p; | |
889 | struct route_node *rn; | |
890 | int result = 0; | |
891 | struct rp_info *rp_info = NULL; | |
892 | struct pim_upstream *up; | |
d0e418b4 | 893 | |
894 | rn = route_node_lookup(pim->rp_table, &group); | |
895 | if (!rn) { | |
896 | result = pim_rp_new(pim, new_rp_addr, group, NULL, rp_src_flag); | |
897 | return result; | |
898 | } | |
899 | ||
900 | rp_info = rn->info; | |
901 | ||
902 | if (!rp_info) { | |
903 | route_unlock_node(rn); | |
904 | result = pim_rp_new(pim, new_rp_addr, group, NULL, rp_src_flag); | |
905 | return result; | |
906 | } | |
907 | ||
908 | if (rp_info->rp.rpf_addr.u.prefix4.s_addr == new_rp_addr.s_addr) { | |
909 | if (rp_info->rp_src != rp_src_flag) { | |
910 | rp_info->rp_src = rp_src_flag; | |
911 | route_unlock_node(rn); | |
912 | return PIM_SUCCESS; | |
913 | } | |
914 | } | |
915 | ||
35a30302 DS |
916 | nht_p.family = AF_INET; |
917 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
918 | ||
d0e418b4 | 919 | /* Deregister old RP addr with Zebra NHT */ |
920 | if (rp_info->rp.rpf_addr.u.prefix4.s_addr != INADDR_ANY) { | |
d0e418b4 | 921 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; |
922 | if (PIM_DEBUG_PIM_NHT_RP) { | |
923 | char buf[PREFIX2STR_BUFFER]; | |
924 | ||
925 | prefix2str(&nht_p, buf, sizeof(buf)); | |
926 | zlog_debug("%s: Deregister RP addr %s with Zebra ", | |
927 | __PRETTY_FUNCTION__, buf); | |
928 | } | |
929 | pim_delete_tracked_nexthop(pim, &nht_p, NULL, rp_info, false); | |
930 | } | |
931 | ||
932 | pim_rp_nexthop_del(rp_info); | |
933 | listnode_delete(pim->rp_list, rp_info); | |
934 | /* Update the new RP address*/ | |
935 | rp_info->rp.rpf_addr.u.prefix4 = new_rp_addr; | |
936 | rp_info->rp_src = rp_src_flag; | |
937 | rp_info->i_am_rp = 0; | |
938 | ||
939 | listnode_add_sort(pim->rp_list, rp_info); | |
940 | ||
dd3364cb | 941 | frr_each (rb_pim_upstream, &pim->upstream_head, up) { |
d0e418b4 | 942 | if (up->sg.src.s_addr == INADDR_ANY) { |
943 | struct prefix grp; | |
944 | struct rp_info *trp_info; | |
945 | ||
946 | grp.family = AF_INET; | |
947 | grp.prefixlen = IPV4_MAX_BITLEN; | |
948 | grp.u.prefix4 = up->sg.grp; | |
949 | trp_info = pim_rp_find_match_group(pim, &grp); | |
950 | ||
951 | if (trp_info == rp_info) | |
952 | pim_upstream_update(pim, up); | |
953 | } | |
954 | } | |
955 | ||
956 | /* Register new RP addr with Zebra NHT */ | |
957 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
958 | if (PIM_DEBUG_PIM_NHT_RP) { | |
959 | char buf[PREFIX2STR_BUFFER]; | |
960 | char buf1[PREFIX2STR_BUFFER]; | |
961 | ||
962 | prefix2str(&nht_p, buf, sizeof(buf)); | |
963 | prefix2str(&rp_info->group, buf1, sizeof(buf1)); | |
964 | zlog_debug("%s: NHT Register RP addr %s grp %s with Zebra ", | |
965 | __PRETTY_FUNCTION__, buf, buf1); | |
966 | } | |
967 | ||
968 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, false, NULL); | |
969 | if (!pim_ecmp_nexthop_lookup(pim, &rp_info->rp.source_nexthop, &nht_p, | |
970 | &rp_info->group, 1)) { | |
971 | route_unlock_node(rn); | |
972 | return PIM_RP_NO_PATH; | |
973 | } | |
974 | ||
975 | pim_rp_check_interfaces(pim, rp_info); | |
976 | ||
977 | route_unlock_node(rn); | |
978 | ||
979 | pim_rp_refresh_group_to_rp_mapping(pim); | |
980 | ||
981 | return result; | |
982 | } | |
983 | ||
fec883d9 | 984 | void pim_rp_setup(struct pim_instance *pim) |
13afbd05 | 985 | { |
d62a17ae | 986 | struct listnode *node; |
987 | struct rp_info *rp_info; | |
d62a17ae | 988 | struct prefix nht_p; |
d62a17ae | 989 | |
d9c9a9ee | 990 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 991 | if (rp_info->rp.rpf_addr.u.prefix4.s_addr == INADDR_NONE) |
992 | continue; | |
993 | ||
994 | nht_p.family = AF_INET; | |
995 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
996 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
8cfd7268 | 997 | |
4533b847 | 998 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, false, |
999 | NULL); | |
43763b11 DS |
1000 | if (!pim_ecmp_nexthop_lookup(pim, &rp_info->rp.source_nexthop, |
1001 | &nht_p, &rp_info->group, 1)) | |
1002 | if (PIM_DEBUG_PIM_NHT_RP) | |
d62a17ae | 1003 | zlog_debug( |
43763b11 | 1004 | "Unable to lookup nexthop for rp specified"); |
d62a17ae | 1005 | } |
13afbd05 DS |
1006 | } |
1007 | ||
54b97c74 | 1008 | /* |
7176984f | 1009 | * Checks to see if we should elect ourself the actual RP when new if |
1010 | * addresses are added against an interface. | |
54b97c74 | 1011 | */ |
d62a17ae | 1012 | void pim_rp_check_on_if_add(struct pim_interface *pim_ifp) |
54b97c74 | 1013 | { |
d62a17ae | 1014 | struct listnode *node; |
1015 | struct rp_info *rp_info; | |
1016 | bool i_am_rp_changed = false; | |
d9c9a9ee | 1017 | struct pim_instance *pim = pim_ifp->pim; |
d62a17ae | 1018 | |
d9c9a9ee | 1019 | if (pim->rp_list == NULL) |
d62a17ae | 1020 | return; |
1021 | ||
d9c9a9ee | 1022 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 1023 | if (pim_rpf_addr_is_inaddr_none(&rp_info->rp)) |
1024 | continue; | |
1025 | ||
1026 | /* if i_am_rp is already set nothing to be done (adding new | |
1027 | * addresses | |
1028 | * is not going to make a difference). */ | |
1029 | if (rp_info->i_am_rp) { | |
1030 | continue; | |
1031 | } | |
1032 | ||
1033 | if (pim_rp_check_interface_addrs(rp_info, pim_ifp)) { | |
1034 | i_am_rp_changed = true; | |
1035 | rp_info->i_am_rp = 1; | |
3d225d48 | 1036 | if (PIM_DEBUG_PIM_NHT_RP) { |
d62a17ae | 1037 | char rp[PREFIX_STRLEN]; |
1038 | pim_addr_dump("<rp?>", &rp_info->rp.rpf_addr, | |
1039 | rp, sizeof(rp)); | |
1040 | zlog_debug("%s: %s: i am rp", __func__, rp); | |
1041 | } | |
1042 | } | |
1043 | } | |
1044 | ||
1045 | if (i_am_rp_changed) { | |
472ad383 | 1046 | pim_msdp_i_am_rp_changed(pim); |
a749b900 | 1047 | pim_upstream_reeval_use_rpt(pim); |
d62a17ae | 1048 | } |
7176984f | 1049 | } |
36d6bd7d | 1050 | |
7176984f | 1051 | /* up-optimized re-evaluation of "i_am_rp". this is used when ifaddresses |
1052 | * are removed. Removing numbers is an uncommon event in an active network | |
1053 | * so I have made no attempt to optimize it. */ | |
fec883d9 | 1054 | void pim_i_am_rp_re_evaluate(struct pim_instance *pim) |
7176984f | 1055 | { |
d62a17ae | 1056 | struct listnode *node; |
1057 | struct rp_info *rp_info; | |
1058 | bool i_am_rp_changed = false; | |
1059 | int old_i_am_rp; | |
1060 | ||
d9c9a9ee | 1061 | if (pim->rp_list == NULL) |
d62a17ae | 1062 | return; |
1063 | ||
d9c9a9ee | 1064 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 1065 | if (pim_rpf_addr_is_inaddr_none(&rp_info->rp)) |
1066 | continue; | |
1067 | ||
1068 | old_i_am_rp = rp_info->i_am_rp; | |
fec883d9 | 1069 | pim_rp_check_interfaces(pim, rp_info); |
d62a17ae | 1070 | |
1071 | if (old_i_am_rp != rp_info->i_am_rp) { | |
1072 | i_am_rp_changed = true; | |
3d225d48 | 1073 | if (PIM_DEBUG_PIM_NHT_RP) { |
d62a17ae | 1074 | char rp[PREFIX_STRLEN]; |
1075 | pim_addr_dump("<rp?>", &rp_info->rp.rpf_addr, | |
1076 | rp, sizeof(rp)); | |
1077 | if (rp_info->i_am_rp) { | |
1078 | zlog_debug("%s: %s: i am rp", __func__, | |
1079 | rp); | |
1080 | } else { | |
1081 | zlog_debug("%s: %s: i am no longer rp", | |
1082 | __func__, rp); | |
1083 | } | |
1084 | } | |
1085 | } | |
1086 | } | |
1087 | ||
1088 | if (i_am_rp_changed) { | |
472ad383 | 1089 | pim_msdp_i_am_rp_changed(pim); |
a749b900 | 1090 | pim_upstream_reeval_use_rpt(pim); |
d62a17ae | 1091 | } |
54b97c74 DS |
1092 | } |
1093 | ||
1094 | /* | |
1095 | * I_am_RP(G) is true if the group-to-RP mapping indicates that | |
1096 | * this router is the RP for the group. | |
1097 | * | |
1098 | * Since we only have static RP, all groups are part of this RP | |
1099 | */ | |
d9c9a9ee | 1100 | int pim_rp_i_am_rp(struct pim_instance *pim, struct in_addr group) |
54b97c74 | 1101 | { |
d62a17ae | 1102 | struct prefix g; |
1103 | struct rp_info *rp_info; | |
36d6bd7d | 1104 | |
d62a17ae | 1105 | memset(&g, 0, sizeof(g)); |
1106 | g.family = AF_INET; | |
1107 | g.prefixlen = 32; | |
1108 | g.u.prefix4 = group; | |
36d6bd7d | 1109 | |
d9c9a9ee | 1110 | rp_info = pim_rp_find_match_group(pim, &g); |
36d6bd7d | 1111 | |
d62a17ae | 1112 | if (rp_info) |
1113 | return rp_info->i_am_rp; | |
36d6bd7d | 1114 | |
d62a17ae | 1115 | return 0; |
54b97c74 DS |
1116 | } |
1117 | ||
71694057 DS |
1118 | /* |
1119 | * RP(G) | |
1120 | * | |
1121 | * Return the RP that the Group belongs too. | |
1122 | */ | |
fec883d9 | 1123 | struct pim_rpf *pim_rp_g(struct pim_instance *pim, struct in_addr group) |
71694057 | 1124 | { |
d62a17ae | 1125 | struct prefix g; |
1126 | struct rp_info *rp_info; | |
1127 | ||
1128 | memset(&g, 0, sizeof(g)); | |
1129 | g.family = AF_INET; | |
1130 | g.prefixlen = 32; | |
1131 | g.u.prefix4 = group; | |
1132 | ||
d9c9a9ee | 1133 | rp_info = pim_rp_find_match_group(pim, &g); |
d62a17ae | 1134 | |
1135 | if (rp_info) { | |
1136 | struct prefix nht_p; | |
43763b11 | 1137 | |
d62a17ae | 1138 | /* Register addr with Zebra NHT */ |
1139 | nht_p.family = AF_INET; | |
1140 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
1141 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
3d225d48 | 1142 | if (PIM_DEBUG_PIM_NHT_RP) { |
d62a17ae | 1143 | char buf[PREFIX2STR_BUFFER]; |
1144 | char buf1[PREFIX2STR_BUFFER]; | |
1145 | prefix2str(&nht_p, buf, sizeof(buf)); | |
1146 | prefix2str(&rp_info->group, buf1, sizeof(buf1)); | |
1147 | zlog_debug( | |
1148 | "%s: NHT Register RP addr %s grp %s with Zebra", | |
1149 | __PRETTY_FUNCTION__, buf, buf1); | |
1150 | } | |
4533b847 | 1151 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, false, |
1152 | NULL); | |
43763b11 DS |
1153 | pim_rpf_set_refresh_time(pim); |
1154 | (void)pim_ecmp_nexthop_lookup(pim, &rp_info->rp.source_nexthop, | |
1155 | &nht_p, &rp_info->group, 1); | |
d62a17ae | 1156 | return (&rp_info->rp); |
1157 | } | |
1158 | ||
1159 | // About to Go Down | |
1160 | return NULL; | |
71694057 DS |
1161 | } |
1162 | ||
8f5f5e91 DS |
1163 | /* |
1164 | * Set the upstream IP address we want to talk to based upon | |
1165 | * the rp configured and the source address | |
1166 | * | |
1167 | * If we have don't have a RP configured and the source address is * | |
732c209c | 1168 | * then set the upstream addr as INADDR_ANY and return failure. |
8f5f5e91 DS |
1169 | * |
1170 | */ | |
d9c9a9ee DS |
1171 | int pim_rp_set_upstream_addr(struct pim_instance *pim, struct in_addr *up, |
1172 | struct in_addr source, struct in_addr group) | |
8f5f5e91 | 1173 | { |
d62a17ae | 1174 | struct rp_info *rp_info; |
1175 | struct prefix g; | |
36d6bd7d | 1176 | |
d62a17ae | 1177 | memset(&g, 0, sizeof(g)); |
1178 | g.family = AF_INET; | |
1179 | g.prefixlen = 32; | |
1180 | g.u.prefix4 = group; | |
36d6bd7d | 1181 | |
d9c9a9ee | 1182 | rp_info = pim_rp_find_match_group(pim, &g); |
36d6bd7d | 1183 | |
b1945363 DS |
1184 | if (!rp_info || ((pim_rpf_addr_is_inaddr_none(&rp_info->rp)) |
1185 | && (source.s_addr == INADDR_ANY))) { | |
3d225d48 | 1186 | if (PIM_DEBUG_PIM_NHT_RP) |
d62a17ae | 1187 | zlog_debug("%s: Received a (*,G) with no RP configured", |
1188 | __PRETTY_FUNCTION__); | |
732c209c | 1189 | up->s_addr = INADDR_ANY; |
d62a17ae | 1190 | return 0; |
1191 | } | |
8f5f5e91 | 1192 | |
d62a17ae | 1193 | *up = (source.s_addr == INADDR_ANY) ? rp_info->rp.rpf_addr.u.prefix4 |
1194 | : source; | |
8f5f5e91 | 1195 | |
d62a17ae | 1196 | return 1; |
8f5f5e91 | 1197 | } |
75a26779 | 1198 | |
0c8b717e DS |
1199 | int pim_rp_config_write(struct pim_instance *pim, struct vty *vty, |
1200 | const char *spaces) | |
75a26779 | 1201 | { |
d62a17ae | 1202 | struct listnode *node; |
1203 | struct rp_info *rp_info; | |
1204 | char rp_buffer[32]; | |
1205 | char group_buffer[32]; | |
1206 | int count = 0; | |
1207 | ||
d9c9a9ee | 1208 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 1209 | if (pim_rpf_addr_is_inaddr_none(&rp_info->rp)) |
1210 | continue; | |
1211 | ||
d0e418b4 | 1212 | if (rp_info->rp_src == RP_SRC_BSR) |
1213 | continue; | |
1214 | ||
d62a17ae | 1215 | if (rp_info->plist) |
0c8b717e | 1216 | vty_out(vty, "%sip pim rp %s prefix-list %s\n", spaces, |
d62a17ae | 1217 | inet_ntop(AF_INET, |
1218 | &rp_info->rp.rpf_addr.u.prefix4, | |
1219 | rp_buffer, 32), | |
1220 | rp_info->plist); | |
1221 | else | |
0c8b717e | 1222 | vty_out(vty, "%sip pim rp %s %s\n", spaces, |
d62a17ae | 1223 | inet_ntop(AF_INET, |
1224 | &rp_info->rp.rpf_addr.u.prefix4, | |
1225 | rp_buffer, 32), | |
1226 | prefix2str(&rp_info->group, group_buffer, 32)); | |
1227 | count++; | |
1228 | } | |
1229 | ||
1230 | return count; | |
75a26779 DS |
1231 | } |
1232 | ||
f43593d9 DS |
1233 | bool pim_rp_check_is_my_ip_address(struct pim_instance *pim, |
1234 | struct in_addr dest_addr) | |
75a26779 | 1235 | { |
fec883d9 | 1236 | if (if_lookup_exact_address(&dest_addr, AF_INET, pim->vrf_id)) |
f43593d9 | 1237 | return true; |
d62a17ae | 1238 | |
f43593d9 | 1239 | return false; |
75a26779 | 1240 | } |
00d07c6f | 1241 | |
088f1098 | 1242 | void pim_rp_show_information(struct pim_instance *pim, struct vty *vty, bool uj) |
00d07c6f | 1243 | { |
d62a17ae | 1244 | struct rp_info *rp_info; |
1245 | struct rp_info *prev_rp_info = NULL; | |
1246 | struct listnode *node; | |
025725f7 | 1247 | char source[7]; |
d62a17ae | 1248 | |
1249 | json_object *json = NULL; | |
1250 | json_object *json_rp_rows = NULL; | |
1251 | json_object *json_row = NULL; | |
1252 | ||
1253 | if (uj) | |
1254 | json = json_object_new_object(); | |
1255 | else | |
1256 | vty_out(vty, | |
d6593fc5 | 1257 | "RP address group/prefix-list OIF I am RP Source\n"); |
d9c9a9ee | 1258 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 1259 | if (!pim_rpf_addr_is_inaddr_none(&rp_info->rp)) { |
1260 | char buf[48]; | |
1261 | ||
025725f7 | 1262 | if (rp_info->rp_src == RP_SRC_STATIC) |
1263 | strcpy(source, "Static"); | |
1264 | else if (rp_info->rp_src == RP_SRC_BSR) | |
1265 | strcpy(source, "BSR"); | |
1266 | else | |
1267 | strcpy(source, "None"); | |
d62a17ae | 1268 | if (uj) { |
1269 | /* | |
1270 | * If we have moved on to a new RP then add the | |
1271 | * entry for the previous RP | |
1272 | */ | |
1273 | if (prev_rp_info | |
1274 | && prev_rp_info->rp.rpf_addr.u.prefix4 | |
1275 | .s_addr | |
1276 | != rp_info->rp.rpf_addr.u.prefix4 | |
1277 | .s_addr) { | |
1278 | json_object_object_add( | |
1279 | json, | |
1280 | inet_ntoa(prev_rp_info->rp | |
1281 | .rpf_addr.u | |
1282 | .prefix4), | |
1283 | json_rp_rows); | |
1284 | json_rp_rows = NULL; | |
1285 | } | |
1286 | ||
1287 | if (!json_rp_rows) | |
1288 | json_rp_rows = json_object_new_array(); | |
1289 | ||
1290 | json_row = json_object_new_object(); | |
1291 | if (rp_info->rp.source_nexthop.interface) | |
1292 | json_object_string_add( | |
1293 | json_row, "outboundInterface", | |
1294 | rp_info->rp.source_nexthop | |
1295 | .interface->name); | |
1296 | ||
1297 | if (rp_info->i_am_rp) | |
1298 | json_object_boolean_true_add(json_row, | |
1299 | "iAmRP"); | |
1300 | ||
1301 | if (rp_info->plist) | |
1302 | json_object_string_add(json_row, | |
1303 | "prefixList", | |
1304 | rp_info->plist); | |
1305 | else | |
1306 | json_object_string_add( | |
1307 | json_row, "group", | |
1308 | prefix2str(&rp_info->group, buf, | |
1309 | 48)); | |
d0e418b4 | 1310 | json_object_string_add(json_row, "source", |
025725f7 | 1311 | source); |
d62a17ae | 1312 | |
1313 | json_object_array_add(json_rp_rows, json_row); | |
1314 | } else { | |
1315 | vty_out(vty, "%-15s ", | |
1316 | inet_ntoa(rp_info->rp.rpf_addr.u | |
1317 | .prefix4)); | |
1318 | ||
1319 | if (rp_info->plist) | |
1320 | vty_out(vty, "%-18s ", rp_info->plist); | |
1321 | else | |
1322 | vty_out(vty, "%-18s ", | |
1323 | prefix2str(&rp_info->group, buf, | |
1324 | 48)); | |
1325 | ||
1326 | if (rp_info->rp.source_nexthop.interface) | |
ff415346 | 1327 | vty_out(vty, "%-16s ", |
d62a17ae | 1328 | rp_info->rp.source_nexthop |
1329 | .interface->name); | |
1330 | else | |
ff415346 | 1331 | vty_out(vty, "%-16s ", "(Unknown)"); |
d62a17ae | 1332 | |
1333 | if (rp_info->i_am_rp) | |
d6593fc5 | 1334 | vty_out(vty, "yes"); |
d62a17ae | 1335 | else |
025725f7 | 1336 | vty_out(vty, "no"); |
d62a17ae | 1337 | |
025725f7 | 1338 | vty_out(vty, "%14s\n", source); |
1339 | } | |
d62a17ae | 1340 | prev_rp_info = rp_info; |
1341 | } | |
1342 | } | |
1343 | ||
1344 | if (uj) { | |
1345 | if (prev_rp_info && json_rp_rows) | |
1346 | json_object_object_add( | |
1347 | json, | |
1348 | inet_ntoa(prev_rp_info->rp.rpf_addr.u.prefix4), | |
1349 | json_rp_rows); | |
1350 | ||
9d303b37 DL |
1351 | vty_out(vty, "%s\n", json_object_to_json_string_ext( |
1352 | json, JSON_C_TO_STRING_PRETTY)); | |
d62a17ae | 1353 | json_object_free(json); |
1354 | } | |
00d07c6f | 1355 | } |
cba44481 | 1356 | |
c9cd7fbc | 1357 | void pim_resolve_rp_nh(struct pim_instance *pim, struct pim_neighbor *nbr) |
cba44481 | 1358 | { |
d62a17ae | 1359 | struct listnode *node = NULL; |
1360 | struct rp_info *rp_info = NULL; | |
1361 | struct nexthop *nh_node = NULL; | |
1362 | struct prefix nht_p; | |
1363 | struct pim_nexthop_cache pnc; | |
d62a17ae | 1364 | |
d9c9a9ee | 1365 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 1366 | if (rp_info->rp.rpf_addr.u.prefix4.s_addr == INADDR_NONE) |
1367 | continue; | |
1368 | ||
1369 | nht_p.family = AF_INET; | |
1370 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
1371 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
1372 | memset(&pnc, 0, sizeof(struct pim_nexthop_cache)); | |
fec883d9 | 1373 | if (!pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, |
4533b847 | 1374 | false, &pnc)) |
cb9c7c50 DS |
1375 | continue; |
1376 | ||
1377 | for (nh_node = pnc.nexthop; nh_node; nh_node = nh_node->next) { | |
1378 | if (nh_node->gate.ipv4.s_addr != 0) | |
1379 | continue; | |
1380 | ||
1381 | struct interface *ifp1 = if_lookup_by_index( | |
fec883d9 | 1382 | nh_node->ifindex, pim->vrf_id); |
c9cd7fbc DS |
1383 | |
1384 | if (nbr->interface != ifp1) | |
cb9c7c50 DS |
1385 | continue; |
1386 | ||
1387 | nh_node->gate.ipv4 = nbr->source_addr; | |
3d225d48 | 1388 | if (PIM_DEBUG_PIM_NHT_RP) { |
cb9c7c50 DS |
1389 | char str[PREFIX_STRLEN]; |
1390 | char str1[INET_ADDRSTRLEN]; | |
1391 | pim_inet4_dump("<nht_nbr?>", nbr->source_addr, | |
1392 | str1, sizeof(str1)); | |
1393 | pim_addr_dump("<nht_addr?>", &nht_p, str, | |
1394 | sizeof(str)); | |
1395 | zlog_debug( | |
1396 | "%s: addr %s new nexthop addr %s interface %s", | |
1397 | __PRETTY_FUNCTION__, str, str1, | |
1398 | ifp1->name); | |
d62a17ae | 1399 | } |
1400 | } | |
1401 | } | |
cba44481 | 1402 | } |