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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", | |
c10e14e9 | 137 | rn, rp_info, route_node_get_lock_count(rn)); |
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); |
e4e52805 DS |
144 | if (pim->rp_table) |
145 | route_table_finish(pim->rp_table); | |
146 | pim->rp_table = NULL; | |
36d6bd7d DS |
147 | } |
148 | ||
dfe43e25 DW |
149 | /* |
150 | * Given an RP's prefix-list, return the RP's rp_info for that prefix-list | |
151 | */ | |
d9c9a9ee DS |
152 | static struct rp_info *pim_rp_find_prefix_list(struct pim_instance *pim, |
153 | struct in_addr rp, | |
d62a17ae | 154 | const char *plist) |
36d6bd7d | 155 | { |
d62a17ae | 156 | struct listnode *node; |
157 | struct rp_info *rp_info; | |
158 | ||
d9c9a9ee | 159 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 160 | if (rp.s_addr == rp_info->rp.rpf_addr.u.prefix4.s_addr |
161 | && rp_info->plist && strcmp(rp_info->plist, plist) == 0) { | |
162 | return rp_info; | |
163 | } | |
164 | } | |
165 | ||
166 | return NULL; | |
36d6bd7d DS |
167 | } |
168 | ||
dfe43e25 DW |
169 | /* |
170 | * Return true if plist is used by any rp_info | |
171 | */ | |
d9c9a9ee | 172 | static int pim_rp_prefix_list_used(struct pim_instance *pim, const char *plist) |
dfe43e25 | 173 | { |
d62a17ae | 174 | struct listnode *node; |
175 | struct rp_info *rp_info; | |
176 | ||
d9c9a9ee | 177 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 178 | if (rp_info->plist && strcmp(rp_info->plist, plist) == 0) { |
179 | return 1; | |
180 | } | |
181 | } | |
182 | ||
183 | return 0; | |
dfe43e25 DW |
184 | } |
185 | ||
186 | /* | |
d62a17ae | 187 | * Given an RP's address, return the RP's rp_info that is an exact match for |
188 | * 'group' | |
dfe43e25 | 189 | */ |
d9c9a9ee DS |
190 | static struct rp_info *pim_rp_find_exact(struct pim_instance *pim, |
191 | struct in_addr rp, | |
123214ef | 192 | const struct prefix *group) |
36d6bd7d | 193 | { |
d62a17ae | 194 | struct listnode *node; |
195 | struct rp_info *rp_info; | |
36d6bd7d | 196 | |
d9c9a9ee | 197 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 198 | if (rp.s_addr == rp_info->rp.rpf_addr.u.prefix4.s_addr |
199 | && prefix_same(&rp_info->group, group)) | |
200 | return rp_info; | |
201 | } | |
54b97c74 | 202 | |
d62a17ae | 203 | return NULL; |
36d6bd7d DS |
204 | } |
205 | ||
dfe43e25 DW |
206 | /* |
207 | * Given a group, return the rp_info for that group | |
208 | */ | |
28309df0 | 209 | struct rp_info *pim_rp_find_match_group(struct pim_instance *pim, |
123214ef | 210 | const struct prefix *group) |
36d6bd7d | 211 | { |
d62a17ae | 212 | struct listnode *node; |
b77b1550 | 213 | struct rp_info *best = NULL; |
d62a17ae | 214 | struct rp_info *rp_info; |
215 | struct prefix_list *plist; | |
123214ef | 216 | const struct prefix *p, *bp; |
89b68082 | 217 | struct route_node *rn; |
d62a17ae | 218 | |
4646b86a | 219 | bp = NULL; |
d9c9a9ee | 220 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 221 | if (rp_info->plist) { |
222 | plist = prefix_list_lookup(AFI_IP, rp_info->plist); | |
223 | ||
996c9314 LB |
224 | if (prefix_list_apply_which_prefix(plist, &p, group) |
225 | == PREFIX_DENY) | |
b77b1550 DS |
226 | continue; |
227 | ||
228 | if (!best) { | |
229 | best = rp_info; | |
230 | bp = p; | |
231 | continue; | |
232 | } | |
233 | ||
4646b86a | 234 | if (bp && bp->prefixlen < p->prefixlen) { |
b77b1550 DS |
235 | best = rp_info; |
236 | bp = p; | |
237 | } | |
d62a17ae | 238 | } |
239 | } | |
240 | ||
89b68082 DS |
241 | rn = route_node_match(pim->rp_table, group); |
242 | if (!rn) { | |
af4c2728 | 243 | flog_err( |
450971aa | 244 | EC_LIB_DEVELOPMENT, |
996c9314 | 245 | "%s: BUG We should have found default group information\n", |
5e81f5dd | 246 | __func__); |
89b68082 DS |
247 | return best; |
248 | } | |
249 | ||
250 | rp_info = rn->info; | |
2dbe669b DA |
251 | if (PIM_DEBUG_PIM_TRACE) |
252 | zlog_debug("Lookedup: %p for rp_info: %p(%pFX) Lock: %d", rn, | |
253 | rp_info, &rp_info->group, | |
c10e14e9 | 254 | route_node_get_lock_count(rn)); |
89b68082 | 255 | |
260c92c8 | 256 | route_unlock_node(rn); |
257 | ||
89b68082 DS |
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 | 353 | zlog_debug("%s: pim upstream update for old upstream %s", |
15569c58 | 354 | __func__, inet_ntoa(old_upstream_addr)); |
28309df0 SP |
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; | |
2dbe669b | 369 | if (PIM_DEBUG_PIM_TRACE) |
15569c58 | 370 | zlog_debug( |
2dbe669b DA |
371 | "%s: Deregister upstream %s addr %pFX with Zebra NHT", |
372 | __func__, up->sg_str, &nht_p); | |
4533b847 | 373 | pim_delete_tracked_nexthop(pim, &nht_p, up, NULL, false); |
28309df0 SP |
374 | } |
375 | ||
376 | /* Update the upstream address */ | |
377 | up->upstream_addr = new_upstream_addr; | |
378 | ||
379 | old_rpf.source_nexthop.interface = up->rpf.source_nexthop.interface; | |
380 | ||
8c55c132 | 381 | rpf_result = pim_rpf_update(pim, up, &old_rpf, __func__); |
28309df0 | 382 | if (rpf_result == PIM_RPF_FAILURE) |
15569c58 | 383 | pim_mroute_del(up->channel_oil, __func__); |
28309df0 SP |
384 | |
385 | /* update kernel multicast forwarding cache (MFC) */ | |
7984af18 AK |
386 | if (up->rpf.source_nexthop.interface && up->channel_oil) |
387 | pim_upstream_mroute_iif_update(up->channel_oil, __func__); | |
28309df0 | 388 | |
b36576e4 AK |
389 | if (rpf_result == PIM_RPF_CHANGED || |
390 | (rpf_result == PIM_RPF_FAILURE && | |
391 | old_rpf.source_nexthop.interface)) | |
28309df0 SP |
392 | pim_zebra_upstream_rpf_changed(pim, up, &old_rpf); |
393 | ||
394 | pim_zebra_update_all_interfaces(pim); | |
395 | } | |
396 | ||
d0e418b4 | 397 | int pim_rp_new_config(struct pim_instance *pim, const char *rp, |
398 | const char *group_range, const char *plist) | |
75a26779 | 399 | { |
d62a17ae | 400 | int result = 0; |
d0e418b4 | 401 | struct prefix group; |
402 | struct in_addr rp_addr; | |
403 | ||
404 | if (group_range == NULL) | |
405 | result = str2prefix("224.0.0.0/4", &group); | |
406 | else { | |
407 | result = str2prefix(group_range, &group); | |
408 | if (result) { | |
409 | struct prefix temp; | |
410 | ||
411 | prefix_copy(&temp, &group); | |
412 | apply_mask(&temp); | |
413 | if (!prefix_same(&group, &temp)) | |
414 | return PIM_GROUP_BAD_ADDR_MASK_COMBO; | |
415 | } | |
416 | } | |
417 | ||
418 | if (!result) | |
419 | return PIM_GROUP_BAD_ADDRESS; | |
420 | ||
421 | result = inet_pton(AF_INET, rp, &rp_addr); | |
422 | ||
423 | if (result <= 0) | |
424 | return PIM_RP_BAD_ADDRESS; | |
425 | ||
426 | result = pim_rp_new(pim, rp_addr, group, plist, RP_SRC_STATIC); | |
427 | return result; | |
428 | } | |
429 | ||
430 | int pim_rp_new(struct pim_instance *pim, struct in_addr rp_addr, | |
431 | struct prefix group, const char *plist, | |
432 | enum rp_source rp_src_flag) | |
433 | { | |
434 | int result = 0; | |
435 | char rp[INET_ADDRSTRLEN]; | |
d62a17ae | 436 | struct rp_info *rp_info; |
437 | struct rp_info *rp_all; | |
438 | struct prefix group_all; | |
439 | struct listnode *node, *nnode; | |
440 | struct rp_info *tmp_rp_info; | |
441 | char buffer[BUFSIZ]; | |
442 | struct prefix nht_p; | |
89b68082 | 443 | struct route_node *rn; |
28309df0 | 444 | struct pim_upstream *up; |
d62a17ae | 445 | |
1e0d1c25 DS |
446 | if (rp_addr.s_addr == INADDR_ANY || |
447 | rp_addr.s_addr == INADDR_NONE) | |
448 | return PIM_RP_BAD_ADDRESS; | |
449 | ||
d62a17ae | 450 | rp_info = XCALLOC(MTYPE_PIM_RP, sizeof(*rp_info)); |
d62a17ae | 451 | |
d62a17ae | 452 | rp_info->rp.rpf_addr.family = AF_INET; |
453 | rp_info->rp.rpf_addr.prefixlen = IPV4_MAX_PREFIXLEN; | |
d0e418b4 | 454 | rp_info->rp.rpf_addr.u.prefix4 = rp_addr; |
455 | prefix_copy(&rp_info->group, &group); | |
456 | rp_info->rp_src = rp_src_flag; | |
d62a17ae | 457 | |
d0e418b4 | 458 | inet_ntop(AF_INET, &rp_info->rp.rpf_addr.u.prefix4, rp, sizeof(rp)); |
d62a17ae | 459 | |
460 | if (plist) { | |
461 | /* | |
462 | * Return if the prefix-list is already configured for this RP | |
463 | */ | |
d9c9a9ee | 464 | if (pim_rp_find_prefix_list(pim, rp_info->rp.rpf_addr.u.prefix4, |
d62a17ae | 465 | plist)) { |
466 | XFREE(MTYPE_PIM_RP, rp_info); | |
467 | return PIM_SUCCESS; | |
468 | } | |
469 | ||
470 | /* | |
471 | * Barf if the prefix-list is already configured for an RP | |
472 | */ | |
d9c9a9ee | 473 | if (pim_rp_prefix_list_used(pim, plist)) { |
d62a17ae | 474 | XFREE(MTYPE_PIM_RP, rp_info); |
475 | return PIM_RP_PFXLIST_IN_USE; | |
476 | } | |
477 | ||
478 | /* | |
479 | * Free any existing rp_info entries for this RP | |
480 | */ | |
d9c9a9ee | 481 | for (ALL_LIST_ELEMENTS(pim->rp_list, node, nnode, |
d62a17ae | 482 | tmp_rp_info)) { |
483 | if (rp_info->rp.rpf_addr.u.prefix4.s_addr | |
484 | == tmp_rp_info->rp.rpf_addr.u.prefix4.s_addr) { | |
485 | if (tmp_rp_info->plist) | |
d0e418b4 | 486 | pim_rp_del_config(pim, rp, NULL, |
487 | tmp_rp_info->plist); | |
d62a17ae | 488 | else |
d0e418b4 | 489 | pim_rp_del_config( |
fec883d9 | 490 | pim, rp, |
d62a17ae | 491 | prefix2str(&tmp_rp_info->group, |
492 | buffer, BUFSIZ), | |
493 | NULL); | |
494 | } | |
495 | } | |
496 | ||
497 | rp_info->plist = XSTRDUP(MTYPE_PIM_FILTER_NAME, plist); | |
498 | } else { | |
89b68082 | 499 | |
2e8345c1 DS |
500 | if (!str2prefix("224.0.0.0/4", &group_all)) { |
501 | XFREE(MTYPE_PIM_RP, rp_info); | |
502 | return PIM_GROUP_BAD_ADDRESS; | |
503 | } | |
d9c9a9ee | 504 | rp_all = pim_rp_find_match_group(pim, &group_all); |
d62a17ae | 505 | |
506 | /* | |
507 | * Barf if group is a non-multicast subnet | |
508 | */ | |
509 | if (!prefix_match(&rp_all->group, &rp_info->group)) { | |
510 | XFREE(MTYPE_PIM_RP, rp_info); | |
511 | return PIM_GROUP_BAD_ADDRESS; | |
512 | } | |
513 | ||
514 | /* | |
515 | * Remove any prefix-list rp_info entries for this RP | |
516 | */ | |
d9c9a9ee | 517 | for (ALL_LIST_ELEMENTS(pim->rp_list, node, nnode, |
d62a17ae | 518 | tmp_rp_info)) { |
519 | if (tmp_rp_info->plist | |
520 | && rp_info->rp.rpf_addr.u.prefix4.s_addr | |
521 | == tmp_rp_info->rp.rpf_addr.u.prefix4 | |
522 | .s_addr) { | |
d0e418b4 | 523 | pim_rp_del_config(pim, rp, NULL, |
524 | tmp_rp_info->plist); | |
d62a17ae | 525 | } |
526 | } | |
527 | ||
528 | /* | |
529 | * Take over the 224.0.0.0/4 group if the rp is INADDR_NONE | |
530 | */ | |
531 | if (prefix_same(&rp_all->group, &rp_info->group) | |
532 | && pim_rpf_addr_is_inaddr_none(&rp_all->rp)) { | |
533 | rp_all->rp.rpf_addr = rp_info->rp.rpf_addr; | |
d0e418b4 | 534 | rp_all->rp_src = rp_src_flag; |
d62a17ae | 535 | XFREE(MTYPE_PIM_RP, rp_info); |
536 | ||
537 | /* Register addr with Zebra NHT */ | |
538 | nht_p.family = AF_INET; | |
539 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
540 | nht_p.u.prefix4 = | |
541 | rp_all->rp.rpf_addr.u.prefix4; // RP address | |
2dbe669b | 542 | if (PIM_DEBUG_PIM_NHT_RP) |
d62a17ae | 543 | zlog_debug( |
2dbe669b DA |
544 | "%s: NHT Register rp_all addr %pFX grp %pFX ", |
545 | __func__, &nht_p, &rp_all->group); | |
28309df0 | 546 | |
dd3364cb | 547 | frr_each (rb_pim_upstream, &pim->upstream_head, up) { |
28309df0 SP |
548 | /* Find (*, G) upstream whose RP is not |
549 | * configured yet | |
550 | */ | |
551 | if ((up->upstream_addr.s_addr == INADDR_ANY) | |
552 | && (up->sg.src.s_addr == INADDR_ANY)) { | |
553 | struct prefix grp; | |
554 | struct rp_info *trp_info; | |
555 | ||
556 | grp.family = AF_INET; | |
557 | grp.prefixlen = IPV4_MAX_BITLEN; | |
558 | grp.u.prefix4 = up->sg.grp; | |
d0e418b4 | 559 | trp_info = pim_rp_find_match_group( |
560 | pim, &grp); | |
28309df0 SP |
561 | if (trp_info == rp_all) |
562 | pim_upstream_update(pim, up); | |
563 | } | |
564 | } | |
565 | ||
5bd51314 DS |
566 | pim_rp_check_interfaces(pim, rp_all); |
567 | pim_rp_refresh_group_to_rp_mapping(pim); | |
43763b11 | 568 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_all, |
4533b847 | 569 | false, NULL); |
570 | ||
43763b11 DS |
571 | if (!pim_ecmp_nexthop_lookup(pim, |
572 | &rp_all->rp.source_nexthop, | |
573 | &nht_p, &rp_all->group, 1)) | |
574 | return PIM_RP_NO_PATH; | |
d62a17ae | 575 | return PIM_SUCCESS; |
576 | } | |
577 | ||
578 | /* | |
579 | * Return if the group is already configured for this RP | |
580 | */ | |
d0e418b4 | 581 | tmp_rp_info = pim_rp_find_exact( |
582 | pim, rp_info->rp.rpf_addr.u.prefix4, &rp_info->group); | |
583 | if (tmp_rp_info) { | |
584 | if ((tmp_rp_info->rp_src != rp_src_flag) | |
585 | && (rp_src_flag == RP_SRC_STATIC)) | |
586 | tmp_rp_info->rp_src = rp_src_flag; | |
d62a17ae | 587 | XFREE(MTYPE_PIM_RP, rp_info); |
d0e418b4 | 588 | return result; |
d62a17ae | 589 | } |
590 | ||
591 | /* | |
592 | * Barf if this group is already covered by some other RP | |
593 | */ | |
d9c9a9ee | 594 | tmp_rp_info = pim_rp_find_match_group(pim, &rp_info->group); |
d62a17ae | 595 | |
596 | if (tmp_rp_info) { | |
597 | if (tmp_rp_info->plist) { | |
598 | XFREE(MTYPE_PIM_RP, rp_info); | |
599 | return PIM_GROUP_PFXLIST_OVERLAP; | |
600 | } else { | |
601 | /* | |
602 | * If the only RP that covers this group is an | |
603 | * RP configured for | |
604 | * 224.0.0.0/4 that is fine, ignore that one. | |
605 | * For all others | |
606 | * though we must return PIM_GROUP_OVERLAP | |
607 | */ | |
89b68082 DS |
608 | if (prefix_same(&rp_info->group, |
609 | &tmp_rp_info->group)) { | |
d0e418b4 | 610 | if ((rp_src_flag == RP_SRC_STATIC) |
611 | && (tmp_rp_info->rp_src | |
612 | == RP_SRC_STATIC)) { | |
613 | XFREE(MTYPE_PIM_RP, rp_info); | |
614 | return PIM_GROUP_OVERLAP; | |
615 | } | |
616 | ||
617 | result = pim_rp_change( | |
618 | pim, | |
619 | rp_info->rp.rpf_addr.u.prefix4, | |
620 | tmp_rp_info->group, | |
621 | rp_src_flag); | |
d62a17ae | 622 | XFREE(MTYPE_PIM_RP, rp_info); |
d0e418b4 | 623 | return result; |
d62a17ae | 624 | } |
625 | } | |
626 | } | |
627 | } | |
628 | ||
d9c9a9ee | 629 | listnode_add_sort(pim->rp_list, rp_info); |
89b68082 | 630 | rn = route_node_get(pim->rp_table, &rp_info->group); |
89b68082 DS |
631 | rn->info = rp_info; |
632 | ||
2dbe669b DA |
633 | if (PIM_DEBUG_PIM_TRACE) |
634 | zlog_debug("Allocated: %p for rp_info: %p(%pFX) Lock: %d", rn, | |
635 | rp_info, &rp_info->group, | |
c10e14e9 | 636 | route_node_get_lock_count(rn)); |
d62a17ae | 637 | |
dd3364cb | 638 | frr_each (rb_pim_upstream, &pim->upstream_head, up) { |
28309df0 SP |
639 | if (up->sg.src.s_addr == INADDR_ANY) { |
640 | struct prefix grp; | |
641 | struct rp_info *trp_info; | |
642 | ||
643 | grp.family = AF_INET; | |
644 | grp.prefixlen = IPV4_MAX_BITLEN; | |
645 | grp.u.prefix4 = up->sg.grp; | |
646 | trp_info = pim_rp_find_match_group(pim, &grp); | |
647 | ||
648 | if (trp_info == rp_info) | |
649 | pim_upstream_update(pim, up); | |
650 | } | |
651 | } | |
652 | ||
5bd51314 DS |
653 | pim_rp_check_interfaces(pim, rp_info); |
654 | pim_rp_refresh_group_to_rp_mapping(pim); | |
655 | ||
d62a17ae | 656 | /* Register addr with Zebra NHT */ |
657 | nht_p.family = AF_INET; | |
658 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
659 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
2dbe669b DA |
660 | if (PIM_DEBUG_PIM_NHT_RP) |
661 | zlog_debug("%s: NHT Register RP addr %pFX grp %pFX with Zebra ", | |
662 | __func__, &nht_p, &rp_info->group); | |
4533b847 | 663 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, false, NULL); |
43763b11 DS |
664 | if (!pim_ecmp_nexthop_lookup(pim, &rp_info->rp.source_nexthop, &nht_p, |
665 | &rp_info->group, 1)) | |
666 | return PIM_RP_NO_PATH; | |
d62a17ae | 667 | |
d62a17ae | 668 | return PIM_SUCCESS; |
75a26779 DS |
669 | } |
670 | ||
d0e418b4 | 671 | int pim_rp_del_config(struct pim_instance *pim, const char *rp, |
672 | const char *group_range, const char *plist) | |
75a26779 | 673 | { |
d62a17ae | 674 | struct prefix group; |
675 | struct in_addr rp_addr; | |
d62a17ae | 676 | int result; |
d62a17ae | 677 | |
678 | if (group_range == NULL) | |
679 | result = str2prefix("224.0.0.0/4", &group); | |
680 | else | |
681 | result = str2prefix(group_range, &group); | |
682 | ||
683 | if (!result) | |
684 | return PIM_GROUP_BAD_ADDRESS; | |
685 | ||
686 | result = inet_pton(AF_INET, rp, &rp_addr); | |
687 | if (result <= 0) | |
688 | return PIM_RP_BAD_ADDRESS; | |
689 | ||
d0e418b4 | 690 | result = pim_rp_del(pim, rp_addr, group, plist, RP_SRC_STATIC); |
691 | return result; | |
692 | } | |
693 | ||
694 | int pim_rp_del(struct pim_instance *pim, struct in_addr rp_addr, | |
695 | struct prefix group, const char *plist, | |
696 | enum rp_source rp_src_flag) | |
697 | { | |
698 | struct prefix g_all; | |
699 | struct rp_info *rp_info; | |
700 | struct rp_info *rp_all; | |
701 | struct prefix nht_p; | |
702 | struct route_node *rn; | |
703 | bool was_plist = false; | |
704 | struct rp_info *trp_info; | |
705 | struct pim_upstream *up; | |
d0e418b4 | 706 | struct bsgrp_node *bsgrp = NULL; |
707 | struct bsm_rpinfo *bsrp = NULL; | |
d0e418b4 | 708 | char rp_str[INET_ADDRSTRLEN]; |
709 | ||
710 | if (!inet_ntop(AF_INET, &rp_addr, rp_str, sizeof(rp_str))) | |
772270f3 | 711 | snprintf(rp_str, sizeof(rp_str), "<rp?>"); |
d0e418b4 | 712 | |
d62a17ae | 713 | if (plist) |
d9c9a9ee | 714 | rp_info = pim_rp_find_prefix_list(pim, rp_addr, plist); |
d62a17ae | 715 | else |
d9c9a9ee | 716 | rp_info = pim_rp_find_exact(pim, rp_addr, &group); |
d62a17ae | 717 | |
718 | if (!rp_info) | |
719 | return PIM_RP_NOT_FOUND; | |
720 | ||
721 | if (rp_info->plist) { | |
722 | XFREE(MTYPE_PIM_FILTER_NAME, rp_info->plist); | |
89b68082 | 723 | was_plist = true; |
d62a17ae | 724 | } |
725 | ||
23fc858a | 726 | if (PIM_DEBUG_PIM_TRACE) |
2dbe669b DA |
727 | zlog_debug("%s: Delete RP %s for the group %pFX", __func__, |
728 | rp_str, &group); | |
d0e418b4 | 729 | |
730 | /* While static RP is getting deleted, we need to check if dynamic RP | |
731 | * present for the same group in BSM RP table, then install the dynamic | |
732 | * RP for the group node into the main rp table | |
733 | */ | |
734 | if (rp_src_flag == RP_SRC_STATIC) { | |
735 | bsgrp = pim_bsm_get_bsgrp_node(&pim->global_scope, &group); | |
736 | ||
737 | if (bsgrp) { | |
738 | bsrp = listnode_head(bsgrp->bsrp_list); | |
739 | if (bsrp) { | |
23fc858a | 740 | if (PIM_DEBUG_PIM_TRACE) { |
d0e418b4 | 741 | char bsrp_str[INET_ADDRSTRLEN]; |
742 | ||
743 | if (!inet_ntop(AF_INET, bsrp, bsrp_str, | |
744 | sizeof(bsrp_str))) | |
772270f3 QY |
745 | snprintf(bsrp_str, |
746 | sizeof(bsrp_str), | |
747 | "<bsrp?>"); | |
d0e418b4 | 748 | |
15569c58 | 749 | zlog_debug( |
2dbe669b DA |
750 | "%s: BSM RP %s found for the group %pFX", |
751 | __func__, bsrp_str, &group); | |
d0e418b4 | 752 | } |
753 | return pim_rp_change(pim, bsrp->rp_address, | |
754 | group, RP_SRC_BSR); | |
755 | } | |
756 | } else { | |
23fc858a | 757 | if (PIM_DEBUG_PIM_TRACE) |
d0e418b4 | 758 | zlog_debug( |
2dbe669b DA |
759 | "%s: BSM RP not found for the group %pFX", |
760 | __func__, &group); | |
d0e418b4 | 761 | } |
762 | } | |
763 | ||
d62a17ae | 764 | /* Deregister addr with Zebra NHT */ |
765 | nht_p.family = AF_INET; | |
766 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
767 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
2dbe669b DA |
768 | if (PIM_DEBUG_PIM_NHT_RP) |
769 | zlog_debug("%s: Deregister RP addr %pFX with Zebra ", __func__, | |
770 | &nht_p); | |
4533b847 | 771 | pim_delete_tracked_nexthop(pim, &nht_p, NULL, rp_info, false); |
d62a17ae | 772 | |
e691f179 DS |
773 | if (!str2prefix("224.0.0.0/4", &g_all)) |
774 | return PIM_RP_BAD_ADDRESS; | |
775 | ||
d9c9a9ee | 776 | rp_all = pim_rp_find_match_group(pim, &g_all); |
d62a17ae | 777 | |
778 | if (rp_all == rp_info) { | |
dd3364cb | 779 | frr_each (rb_pim_upstream, &pim->upstream_head, up) { |
8cfd7268 SP |
780 | /* Find the upstream (*, G) whose upstream address is |
781 | * same as the deleted RP | |
782 | */ | |
d0e418b4 | 783 | if ((up->upstream_addr.s_addr |
784 | == rp_info->rp.rpf_addr.u.prefix4.s_addr) | |
785 | && (up->sg.src.s_addr == INADDR_ANY)) { | |
8cfd7268 SP |
786 | struct prefix grp; |
787 | grp.family = AF_INET; | |
788 | grp.prefixlen = IPV4_MAX_BITLEN; | |
789 | grp.u.prefix4 = up->sg.grp; | |
790 | trp_info = pim_rp_find_match_group(pim, &grp); | |
791 | if (trp_info == rp_all) { | |
792 | pim_upstream_rpf_clear(pim, up); | |
793 | up->upstream_addr.s_addr = INADDR_ANY; | |
794 | } | |
795 | } | |
796 | } | |
d62a17ae | 797 | rp_all->rp.rpf_addr.family = AF_INET; |
798 | rp_all->rp.rpf_addr.u.prefix4.s_addr = INADDR_NONE; | |
799 | rp_all->i_am_rp = 0; | |
800 | return PIM_SUCCESS; | |
801 | } | |
802 | ||
d9c9a9ee | 803 | listnode_delete(pim->rp_list, rp_info); |
89b68082 DS |
804 | |
805 | if (!was_plist) { | |
806 | rn = route_node_get(pim->rp_table, &rp_info->group); | |
807 | if (rn) { | |
808 | if (rn->info != rp_info) | |
af4c2728 | 809 | flog_err( |
450971aa | 810 | EC_LIB_DEVELOPMENT, |
3613d898 | 811 | "Expected rn->info to be equal to rp_info"); |
89b68082 | 812 | |
2dbe669b | 813 | if (PIM_DEBUG_PIM_TRACE) |
996c9314 | 814 | zlog_debug( |
2dbe669b DA |
815 | "%s:Found for Freeing: %p for rp_info: %p(%pFX) Lock: %d", |
816 | __func__, rn, rp_info, &rp_info->group, | |
c10e14e9 | 817 | route_node_get_lock_count(rn)); |
2dbe669b | 818 | |
89b68082 DS |
819 | rn->info = NULL; |
820 | route_unlock_node(rn); | |
821 | route_unlock_node(rn); | |
822 | } | |
823 | } | |
824 | ||
472ad383 | 825 | pim_rp_refresh_group_to_rp_mapping(pim); |
093c928f | 826 | |
dd3364cb | 827 | frr_each (rb_pim_upstream, &pim->upstream_head, up) { |
8cfd7268 SP |
828 | /* Find the upstream (*, G) whose upstream address is same as |
829 | * the deleted RP | |
830 | */ | |
d0e418b4 | 831 | if ((up->upstream_addr.s_addr |
832 | == rp_info->rp.rpf_addr.u.prefix4.s_addr) | |
833 | && (up->sg.src.s_addr == INADDR_ANY)) { | |
8cfd7268 SP |
834 | struct prefix grp; |
835 | ||
836 | grp.family = AF_INET; | |
837 | grp.prefixlen = IPV4_MAX_BITLEN; | |
838 | grp.u.prefix4 = up->sg.grp; | |
839 | ||
840 | trp_info = pim_rp_find_match_group(pim, &grp); | |
841 | ||
842 | /* RP not found for the group grp */ | |
843 | if (pim_rpf_addr_is_inaddr_none(&trp_info->rp)) { | |
844 | pim_upstream_rpf_clear(pim, up); | |
d0e418b4 | 845 | pim_rp_set_upstream_addr( |
846 | pim, &up->upstream_addr, up->sg.src, | |
847 | up->sg.grp); | |
8cfd7268 SP |
848 | } |
849 | ||
850 | /* RP found for the group grp */ | |
851 | else | |
852 | pim_upstream_update(pim, up); | |
853 | } | |
854 | } | |
855 | ||
093c928f | 856 | XFREE(MTYPE_PIM_RP, rp_info); |
d62a17ae | 857 | return PIM_SUCCESS; |
75a26779 | 858 | } |
13afbd05 | 859 | |
d0e418b4 | 860 | int pim_rp_change(struct pim_instance *pim, struct in_addr new_rp_addr, |
861 | struct prefix group, enum rp_source rp_src_flag) | |
862 | { | |
863 | struct prefix nht_p; | |
864 | struct route_node *rn; | |
865 | int result = 0; | |
866 | struct rp_info *rp_info = NULL; | |
867 | struct pim_upstream *up; | |
d0e418b4 | 868 | |
869 | rn = route_node_lookup(pim->rp_table, &group); | |
870 | if (!rn) { | |
871 | result = pim_rp_new(pim, new_rp_addr, group, NULL, rp_src_flag); | |
872 | return result; | |
873 | } | |
874 | ||
875 | rp_info = rn->info; | |
876 | ||
877 | if (!rp_info) { | |
878 | route_unlock_node(rn); | |
879 | result = pim_rp_new(pim, new_rp_addr, group, NULL, rp_src_flag); | |
880 | return result; | |
881 | } | |
882 | ||
883 | if (rp_info->rp.rpf_addr.u.prefix4.s_addr == new_rp_addr.s_addr) { | |
884 | if (rp_info->rp_src != rp_src_flag) { | |
885 | rp_info->rp_src = rp_src_flag; | |
886 | route_unlock_node(rn); | |
887 | return PIM_SUCCESS; | |
888 | } | |
889 | } | |
890 | ||
35a30302 DS |
891 | nht_p.family = AF_INET; |
892 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
893 | ||
d0e418b4 | 894 | /* Deregister old RP addr with Zebra NHT */ |
895 | if (rp_info->rp.rpf_addr.u.prefix4.s_addr != INADDR_ANY) { | |
d0e418b4 | 896 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; |
2dbe669b DA |
897 | if (PIM_DEBUG_PIM_NHT_RP) |
898 | zlog_debug("%s: Deregister RP addr %pFX with Zebra ", | |
899 | __func__, &nht_p); | |
d0e418b4 | 900 | pim_delete_tracked_nexthop(pim, &nht_p, NULL, rp_info, false); |
901 | } | |
902 | ||
903 | pim_rp_nexthop_del(rp_info); | |
904 | listnode_delete(pim->rp_list, rp_info); | |
905 | /* Update the new RP address*/ | |
906 | rp_info->rp.rpf_addr.u.prefix4 = new_rp_addr; | |
907 | rp_info->rp_src = rp_src_flag; | |
908 | rp_info->i_am_rp = 0; | |
909 | ||
910 | listnode_add_sort(pim->rp_list, rp_info); | |
911 | ||
dd3364cb | 912 | frr_each (rb_pim_upstream, &pim->upstream_head, up) { |
d0e418b4 | 913 | if (up->sg.src.s_addr == INADDR_ANY) { |
914 | struct prefix grp; | |
915 | struct rp_info *trp_info; | |
916 | ||
917 | grp.family = AF_INET; | |
918 | grp.prefixlen = IPV4_MAX_BITLEN; | |
919 | grp.u.prefix4 = up->sg.grp; | |
920 | trp_info = pim_rp_find_match_group(pim, &grp); | |
921 | ||
922 | if (trp_info == rp_info) | |
923 | pim_upstream_update(pim, up); | |
924 | } | |
925 | } | |
926 | ||
927 | /* Register new RP addr with Zebra NHT */ | |
928 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
2dbe669b DA |
929 | if (PIM_DEBUG_PIM_NHT_RP) |
930 | zlog_debug("%s: NHT Register RP addr %pFX grp %pFX with Zebra ", | |
931 | __func__, &nht_p, &rp_info->group); | |
d0e418b4 | 932 | |
933 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, false, NULL); | |
934 | if (!pim_ecmp_nexthop_lookup(pim, &rp_info->rp.source_nexthop, &nht_p, | |
935 | &rp_info->group, 1)) { | |
936 | route_unlock_node(rn); | |
937 | return PIM_RP_NO_PATH; | |
938 | } | |
939 | ||
940 | pim_rp_check_interfaces(pim, rp_info); | |
941 | ||
942 | route_unlock_node(rn); | |
943 | ||
944 | pim_rp_refresh_group_to_rp_mapping(pim); | |
945 | ||
946 | return result; | |
947 | } | |
948 | ||
fec883d9 | 949 | void pim_rp_setup(struct pim_instance *pim) |
13afbd05 | 950 | { |
d62a17ae | 951 | struct listnode *node; |
952 | struct rp_info *rp_info; | |
d62a17ae | 953 | struct prefix nht_p; |
d62a17ae | 954 | |
d9c9a9ee | 955 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 956 | if (rp_info->rp.rpf_addr.u.prefix4.s_addr == INADDR_NONE) |
957 | continue; | |
958 | ||
959 | nht_p.family = AF_INET; | |
960 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
961 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
8cfd7268 | 962 | |
4533b847 | 963 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, false, |
964 | NULL); | |
43763b11 DS |
965 | if (!pim_ecmp_nexthop_lookup(pim, &rp_info->rp.source_nexthop, |
966 | &nht_p, &rp_info->group, 1)) | |
967 | if (PIM_DEBUG_PIM_NHT_RP) | |
d62a17ae | 968 | zlog_debug( |
43763b11 | 969 | "Unable to lookup nexthop for rp specified"); |
d62a17ae | 970 | } |
13afbd05 DS |
971 | } |
972 | ||
54b97c74 | 973 | /* |
7176984f | 974 | * Checks to see if we should elect ourself the actual RP when new if |
975 | * addresses are added against an interface. | |
54b97c74 | 976 | */ |
d62a17ae | 977 | void pim_rp_check_on_if_add(struct pim_interface *pim_ifp) |
54b97c74 | 978 | { |
d62a17ae | 979 | struct listnode *node; |
980 | struct rp_info *rp_info; | |
981 | bool i_am_rp_changed = false; | |
d9c9a9ee | 982 | struct pim_instance *pim = pim_ifp->pim; |
d62a17ae | 983 | |
d9c9a9ee | 984 | if (pim->rp_list == NULL) |
d62a17ae | 985 | return; |
986 | ||
d9c9a9ee | 987 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 988 | if (pim_rpf_addr_is_inaddr_none(&rp_info->rp)) |
989 | continue; | |
990 | ||
991 | /* if i_am_rp is already set nothing to be done (adding new | |
992 | * addresses | |
993 | * is not going to make a difference). */ | |
994 | if (rp_info->i_am_rp) { | |
995 | continue; | |
996 | } | |
997 | ||
998 | if (pim_rp_check_interface_addrs(rp_info, pim_ifp)) { | |
999 | i_am_rp_changed = true; | |
1000 | rp_info->i_am_rp = 1; | |
3d225d48 | 1001 | if (PIM_DEBUG_PIM_NHT_RP) { |
d62a17ae | 1002 | char rp[PREFIX_STRLEN]; |
1003 | pim_addr_dump("<rp?>", &rp_info->rp.rpf_addr, | |
1004 | rp, sizeof(rp)); | |
1005 | zlog_debug("%s: %s: i am rp", __func__, rp); | |
1006 | } | |
1007 | } | |
1008 | } | |
1009 | ||
1010 | if (i_am_rp_changed) { | |
472ad383 | 1011 | pim_msdp_i_am_rp_changed(pim); |
a749b900 | 1012 | pim_upstream_reeval_use_rpt(pim); |
d62a17ae | 1013 | } |
7176984f | 1014 | } |
36d6bd7d | 1015 | |
7176984f | 1016 | /* up-optimized re-evaluation of "i_am_rp". this is used when ifaddresses |
1017 | * are removed. Removing numbers is an uncommon event in an active network | |
1018 | * so I have made no attempt to optimize it. */ | |
fec883d9 | 1019 | void pim_i_am_rp_re_evaluate(struct pim_instance *pim) |
7176984f | 1020 | { |
d62a17ae | 1021 | struct listnode *node; |
1022 | struct rp_info *rp_info; | |
1023 | bool i_am_rp_changed = false; | |
1024 | int old_i_am_rp; | |
1025 | ||
d9c9a9ee | 1026 | if (pim->rp_list == NULL) |
d62a17ae | 1027 | return; |
1028 | ||
d9c9a9ee | 1029 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 1030 | if (pim_rpf_addr_is_inaddr_none(&rp_info->rp)) |
1031 | continue; | |
1032 | ||
1033 | old_i_am_rp = rp_info->i_am_rp; | |
fec883d9 | 1034 | pim_rp_check_interfaces(pim, rp_info); |
d62a17ae | 1035 | |
1036 | if (old_i_am_rp != rp_info->i_am_rp) { | |
1037 | i_am_rp_changed = true; | |
3d225d48 | 1038 | if (PIM_DEBUG_PIM_NHT_RP) { |
d62a17ae | 1039 | char rp[PREFIX_STRLEN]; |
1040 | pim_addr_dump("<rp?>", &rp_info->rp.rpf_addr, | |
1041 | rp, sizeof(rp)); | |
1042 | if (rp_info->i_am_rp) { | |
1043 | zlog_debug("%s: %s: i am rp", __func__, | |
1044 | rp); | |
1045 | } else { | |
1046 | zlog_debug("%s: %s: i am no longer rp", | |
1047 | __func__, rp); | |
1048 | } | |
1049 | } | |
1050 | } | |
1051 | } | |
1052 | ||
1053 | if (i_am_rp_changed) { | |
472ad383 | 1054 | pim_msdp_i_am_rp_changed(pim); |
a749b900 | 1055 | pim_upstream_reeval_use_rpt(pim); |
d62a17ae | 1056 | } |
54b97c74 DS |
1057 | } |
1058 | ||
1059 | /* | |
1060 | * I_am_RP(G) is true if the group-to-RP mapping indicates that | |
1061 | * this router is the RP for the group. | |
1062 | * | |
1063 | * Since we only have static RP, all groups are part of this RP | |
1064 | */ | |
d9c9a9ee | 1065 | int pim_rp_i_am_rp(struct pim_instance *pim, struct in_addr group) |
54b97c74 | 1066 | { |
d62a17ae | 1067 | struct prefix g; |
1068 | struct rp_info *rp_info; | |
36d6bd7d | 1069 | |
d62a17ae | 1070 | memset(&g, 0, sizeof(g)); |
1071 | g.family = AF_INET; | |
1072 | g.prefixlen = 32; | |
1073 | g.u.prefix4 = group; | |
36d6bd7d | 1074 | |
d9c9a9ee | 1075 | rp_info = pim_rp_find_match_group(pim, &g); |
36d6bd7d | 1076 | |
d62a17ae | 1077 | if (rp_info) |
1078 | return rp_info->i_am_rp; | |
36d6bd7d | 1079 | |
d62a17ae | 1080 | return 0; |
54b97c74 DS |
1081 | } |
1082 | ||
71694057 DS |
1083 | /* |
1084 | * RP(G) | |
1085 | * | |
1086 | * Return the RP that the Group belongs too. | |
1087 | */ | |
fec883d9 | 1088 | struct pim_rpf *pim_rp_g(struct pim_instance *pim, struct in_addr group) |
71694057 | 1089 | { |
d62a17ae | 1090 | struct prefix g; |
1091 | struct rp_info *rp_info; | |
1092 | ||
1093 | memset(&g, 0, sizeof(g)); | |
1094 | g.family = AF_INET; | |
1095 | g.prefixlen = 32; | |
1096 | g.u.prefix4 = group; | |
1097 | ||
d9c9a9ee | 1098 | rp_info = pim_rp_find_match_group(pim, &g); |
d62a17ae | 1099 | |
1100 | if (rp_info) { | |
1101 | struct prefix nht_p; | |
43763b11 | 1102 | |
d62a17ae | 1103 | /* Register addr with Zebra NHT */ |
1104 | nht_p.family = AF_INET; | |
1105 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
1106 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
2dbe669b | 1107 | if (PIM_DEBUG_PIM_NHT_RP) |
d62a17ae | 1108 | zlog_debug( |
2dbe669b DA |
1109 | "%s: NHT Register RP addr %pFX grp %pFX with Zebra", |
1110 | __func__, &nht_p, &rp_info->group); | |
4533b847 | 1111 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, false, |
1112 | NULL); | |
43763b11 DS |
1113 | pim_rpf_set_refresh_time(pim); |
1114 | (void)pim_ecmp_nexthop_lookup(pim, &rp_info->rp.source_nexthop, | |
1115 | &nht_p, &rp_info->group, 1); | |
d62a17ae | 1116 | return (&rp_info->rp); |
1117 | } | |
1118 | ||
1119 | // About to Go Down | |
1120 | return NULL; | |
71694057 DS |
1121 | } |
1122 | ||
8f5f5e91 DS |
1123 | /* |
1124 | * Set the upstream IP address we want to talk to based upon | |
1125 | * the rp configured and the source address | |
1126 | * | |
1127 | * If we have don't have a RP configured and the source address is * | |
732c209c | 1128 | * then set the upstream addr as INADDR_ANY and return failure. |
8f5f5e91 DS |
1129 | * |
1130 | */ | |
d9c9a9ee DS |
1131 | int pim_rp_set_upstream_addr(struct pim_instance *pim, struct in_addr *up, |
1132 | struct in_addr source, struct in_addr group) | |
8f5f5e91 | 1133 | { |
d62a17ae | 1134 | struct rp_info *rp_info; |
1135 | struct prefix g; | |
36d6bd7d | 1136 | |
d62a17ae | 1137 | memset(&g, 0, sizeof(g)); |
1138 | g.family = AF_INET; | |
1139 | g.prefixlen = 32; | |
1140 | g.u.prefix4 = group; | |
36d6bd7d | 1141 | |
d9c9a9ee | 1142 | rp_info = pim_rp_find_match_group(pim, &g); |
36d6bd7d | 1143 | |
b1945363 DS |
1144 | if (!rp_info || ((pim_rpf_addr_is_inaddr_none(&rp_info->rp)) |
1145 | && (source.s_addr == INADDR_ANY))) { | |
3d225d48 | 1146 | if (PIM_DEBUG_PIM_NHT_RP) |
d62a17ae | 1147 | zlog_debug("%s: Received a (*,G) with no RP configured", |
15569c58 | 1148 | __func__); |
732c209c | 1149 | up->s_addr = INADDR_ANY; |
d62a17ae | 1150 | return 0; |
1151 | } | |
8f5f5e91 | 1152 | |
d62a17ae | 1153 | *up = (source.s_addr == INADDR_ANY) ? rp_info->rp.rpf_addr.u.prefix4 |
1154 | : source; | |
8f5f5e91 | 1155 | |
d62a17ae | 1156 | return 1; |
8f5f5e91 | 1157 | } |
75a26779 | 1158 | |
0c8b717e DS |
1159 | int pim_rp_config_write(struct pim_instance *pim, struct vty *vty, |
1160 | const char *spaces) | |
75a26779 | 1161 | { |
d62a17ae | 1162 | struct listnode *node; |
1163 | struct rp_info *rp_info; | |
1164 | char rp_buffer[32]; | |
d62a17ae | 1165 | int count = 0; |
1166 | ||
d9c9a9ee | 1167 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 1168 | if (pim_rpf_addr_is_inaddr_none(&rp_info->rp)) |
1169 | continue; | |
1170 | ||
d0e418b4 | 1171 | if (rp_info->rp_src == RP_SRC_BSR) |
1172 | continue; | |
1173 | ||
d62a17ae | 1174 | if (rp_info->plist) |
0c8b717e | 1175 | vty_out(vty, "%sip pim rp %s prefix-list %s\n", spaces, |
d62a17ae | 1176 | inet_ntop(AF_INET, |
1177 | &rp_info->rp.rpf_addr.u.prefix4, | |
1178 | rp_buffer, 32), | |
1179 | rp_info->plist); | |
1180 | else | |
2dbe669b | 1181 | vty_out(vty, "%sip pim rp %s %pFX\n", spaces, |
d62a17ae | 1182 | inet_ntop(AF_INET, |
1183 | &rp_info->rp.rpf_addr.u.prefix4, | |
1184 | rp_buffer, 32), | |
2dbe669b | 1185 | &rp_info->group); |
d62a17ae | 1186 | count++; |
1187 | } | |
1188 | ||
1189 | return count; | |
75a26779 DS |
1190 | } |
1191 | ||
f43593d9 DS |
1192 | bool pim_rp_check_is_my_ip_address(struct pim_instance *pim, |
1193 | struct in_addr dest_addr) | |
75a26779 | 1194 | { |
fec883d9 | 1195 | if (if_lookup_exact_address(&dest_addr, AF_INET, pim->vrf_id)) |
f43593d9 | 1196 | return true; |
d62a17ae | 1197 | |
f43593d9 | 1198 | return false; |
75a26779 | 1199 | } |
00d07c6f | 1200 | |
088f1098 | 1201 | void pim_rp_show_information(struct pim_instance *pim, struct vty *vty, bool uj) |
00d07c6f | 1202 | { |
d62a17ae | 1203 | struct rp_info *rp_info; |
1204 | struct rp_info *prev_rp_info = NULL; | |
1205 | struct listnode *node; | |
025725f7 | 1206 | char source[7]; |
d62a17ae | 1207 | |
1208 | json_object *json = NULL; | |
1209 | json_object *json_rp_rows = NULL; | |
1210 | json_object *json_row = NULL; | |
1211 | ||
1212 | if (uj) | |
1213 | json = json_object_new_object(); | |
1214 | else | |
1215 | vty_out(vty, | |
d6593fc5 | 1216 | "RP address group/prefix-list OIF I am RP Source\n"); |
d9c9a9ee | 1217 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 1218 | if (!pim_rpf_addr_is_inaddr_none(&rp_info->rp)) { |
1219 | char buf[48]; | |
1220 | ||
025725f7 | 1221 | if (rp_info->rp_src == RP_SRC_STATIC) |
96e43299 | 1222 | strlcpy(source, "Static", sizeof(source)); |
025725f7 | 1223 | else if (rp_info->rp_src == RP_SRC_BSR) |
96e43299 | 1224 | strlcpy(source, "BSR", sizeof(source)); |
025725f7 | 1225 | else |
96e43299 | 1226 | strlcpy(source, "None", sizeof(source)); |
d62a17ae | 1227 | if (uj) { |
1228 | /* | |
1229 | * If we have moved on to a new RP then add the | |
1230 | * entry for the previous RP | |
1231 | */ | |
1232 | if (prev_rp_info | |
1233 | && prev_rp_info->rp.rpf_addr.u.prefix4 | |
1234 | .s_addr | |
1235 | != rp_info->rp.rpf_addr.u.prefix4 | |
1236 | .s_addr) { | |
1237 | json_object_object_add( | |
1238 | json, | |
1239 | inet_ntoa(prev_rp_info->rp | |
1240 | .rpf_addr.u | |
1241 | .prefix4), | |
1242 | json_rp_rows); | |
1243 | json_rp_rows = NULL; | |
1244 | } | |
1245 | ||
1246 | if (!json_rp_rows) | |
1247 | json_rp_rows = json_object_new_array(); | |
1248 | ||
1249 | json_row = json_object_new_object(); | |
ac8e400c SP |
1250 | json_object_string_add( |
1251 | json_row, "rpAddress", | |
1252 | inet_ntoa(rp_info->rp.rpf_addr.u | |
1253 | .prefix4)); | |
d62a17ae | 1254 | if (rp_info->rp.source_nexthop.interface) |
1255 | json_object_string_add( | |
1256 | json_row, "outboundInterface", | |
1257 | rp_info->rp.source_nexthop | |
1258 | .interface->name); | |
a7a5472e SP |
1259 | else |
1260 | json_object_string_add( | |
1261 | json_row, "outboundInterface", | |
1262 | "Unknown"); | |
d62a17ae | 1263 | if (rp_info->i_am_rp) |
1264 | json_object_boolean_true_add(json_row, | |
1265 | "iAmRP"); | |
a7a5472e SP |
1266 | else |
1267 | json_object_boolean_false_add(json_row, | |
1268 | "iAmRP"); | |
d62a17ae | 1269 | |
1270 | if (rp_info->plist) | |
1271 | json_object_string_add(json_row, | |
1272 | "prefixList", | |
1273 | rp_info->plist); | |
1274 | else | |
1275 | json_object_string_add( | |
1276 | json_row, "group", | |
1277 | prefix2str(&rp_info->group, buf, | |
1278 | 48)); | |
d0e418b4 | 1279 | json_object_string_add(json_row, "source", |
025725f7 | 1280 | source); |
d62a17ae | 1281 | |
1282 | json_object_array_add(json_rp_rows, json_row); | |
1283 | } else { | |
1284 | vty_out(vty, "%-15s ", | |
1285 | inet_ntoa(rp_info->rp.rpf_addr.u | |
1286 | .prefix4)); | |
1287 | ||
1288 | if (rp_info->plist) | |
1289 | vty_out(vty, "%-18s ", rp_info->plist); | |
1290 | else | |
2dbe669b DA |
1291 | vty_out(vty, "%-18pFX ", |
1292 | &rp_info->group); | |
d62a17ae | 1293 | |
1294 | if (rp_info->rp.source_nexthop.interface) | |
ff415346 | 1295 | vty_out(vty, "%-16s ", |
d62a17ae | 1296 | rp_info->rp.source_nexthop |
1297 | .interface->name); | |
1298 | else | |
ff415346 | 1299 | vty_out(vty, "%-16s ", "(Unknown)"); |
d62a17ae | 1300 | |
1301 | if (rp_info->i_am_rp) | |
d6593fc5 | 1302 | vty_out(vty, "yes"); |
d62a17ae | 1303 | else |
025725f7 | 1304 | vty_out(vty, "no"); |
d62a17ae | 1305 | |
025725f7 | 1306 | vty_out(vty, "%14s\n", source); |
1307 | } | |
d62a17ae | 1308 | prev_rp_info = rp_info; |
1309 | } | |
1310 | } | |
1311 | ||
1312 | if (uj) { | |
1313 | if (prev_rp_info && json_rp_rows) | |
1314 | json_object_object_add( | |
1315 | json, | |
1316 | inet_ntoa(prev_rp_info->rp.rpf_addr.u.prefix4), | |
1317 | json_rp_rows); | |
1318 | ||
9d303b37 DL |
1319 | vty_out(vty, "%s\n", json_object_to_json_string_ext( |
1320 | json, JSON_C_TO_STRING_PRETTY)); | |
d62a17ae | 1321 | json_object_free(json); |
1322 | } | |
00d07c6f | 1323 | } |
cba44481 | 1324 | |
c9cd7fbc | 1325 | void pim_resolve_rp_nh(struct pim_instance *pim, struct pim_neighbor *nbr) |
cba44481 | 1326 | { |
d62a17ae | 1327 | struct listnode *node = NULL; |
1328 | struct rp_info *rp_info = NULL; | |
1329 | struct nexthop *nh_node = NULL; | |
1330 | struct prefix nht_p; | |
1331 | struct pim_nexthop_cache pnc; | |
d62a17ae | 1332 | |
d9c9a9ee | 1333 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 1334 | if (rp_info->rp.rpf_addr.u.prefix4.s_addr == INADDR_NONE) |
1335 | continue; | |
1336 | ||
1337 | nht_p.family = AF_INET; | |
1338 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
1339 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
1340 | memset(&pnc, 0, sizeof(struct pim_nexthop_cache)); | |
fec883d9 | 1341 | if (!pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, |
4533b847 | 1342 | false, &pnc)) |
cb9c7c50 DS |
1343 | continue; |
1344 | ||
1345 | for (nh_node = pnc.nexthop; nh_node; nh_node = nh_node->next) { | |
1346 | if (nh_node->gate.ipv4.s_addr != 0) | |
1347 | continue; | |
1348 | ||
1349 | struct interface *ifp1 = if_lookup_by_index( | |
fec883d9 | 1350 | nh_node->ifindex, pim->vrf_id); |
c9cd7fbc DS |
1351 | |
1352 | if (nbr->interface != ifp1) | |
cb9c7c50 DS |
1353 | continue; |
1354 | ||
1355 | nh_node->gate.ipv4 = nbr->source_addr; | |
3d225d48 | 1356 | if (PIM_DEBUG_PIM_NHT_RP) { |
cb9c7c50 DS |
1357 | char str[PREFIX_STRLEN]; |
1358 | char str1[INET_ADDRSTRLEN]; | |
1359 | pim_inet4_dump("<nht_nbr?>", nbr->source_addr, | |
1360 | str1, sizeof(str1)); | |
1361 | pim_addr_dump("<nht_addr?>", &nht_p, str, | |
1362 | sizeof(str)); | |
1363 | zlog_debug( | |
1364 | "%s: addr %s new nexthop addr %s interface %s", | |
5e81f5dd | 1365 | __func__, str, str1, ifp1->name); |
d62a17ae | 1366 | } |
1367 | } | |
1368 | } | |
cba44481 | 1369 | } |