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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 | ||
ae14da48 | 385 | rpf_result = pim_rpf_update(pim, up, &old_rpf); |
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 SP |
392 | |
393 | if (rpf_result == PIM_RPF_CHANGED) | |
394 | pim_zebra_upstream_rpf_changed(pim, up, &old_rpf); | |
395 | ||
396 | pim_zebra_update_all_interfaces(pim); | |
397 | } | |
398 | ||
d0e418b4 | 399 | int pim_rp_new_config(struct pim_instance *pim, const char *rp, |
400 | const char *group_range, const char *plist) | |
75a26779 | 401 | { |
d62a17ae | 402 | int result = 0; |
d0e418b4 | 403 | struct prefix group; |
404 | struct in_addr rp_addr; | |
405 | ||
406 | if (group_range == NULL) | |
407 | result = str2prefix("224.0.0.0/4", &group); | |
408 | else { | |
409 | result = str2prefix(group_range, &group); | |
410 | if (result) { | |
411 | struct prefix temp; | |
412 | ||
413 | prefix_copy(&temp, &group); | |
414 | apply_mask(&temp); | |
415 | if (!prefix_same(&group, &temp)) | |
416 | return PIM_GROUP_BAD_ADDR_MASK_COMBO; | |
417 | } | |
418 | } | |
419 | ||
420 | if (!result) | |
421 | return PIM_GROUP_BAD_ADDRESS; | |
422 | ||
423 | result = inet_pton(AF_INET, rp, &rp_addr); | |
424 | ||
425 | if (result <= 0) | |
426 | return PIM_RP_BAD_ADDRESS; | |
427 | ||
428 | result = pim_rp_new(pim, rp_addr, group, plist, RP_SRC_STATIC); | |
429 | return result; | |
430 | } | |
431 | ||
432 | int pim_rp_new(struct pim_instance *pim, struct in_addr rp_addr, | |
433 | struct prefix group, const char *plist, | |
434 | enum rp_source rp_src_flag) | |
435 | { | |
436 | int result = 0; | |
437 | char rp[INET_ADDRSTRLEN]; | |
d62a17ae | 438 | struct rp_info *rp_info; |
439 | struct rp_info *rp_all; | |
440 | struct prefix group_all; | |
441 | struct listnode *node, *nnode; | |
442 | struct rp_info *tmp_rp_info; | |
443 | char buffer[BUFSIZ]; | |
444 | struct prefix nht_p; | |
89b68082 | 445 | struct route_node *rn; |
28309df0 SP |
446 | struct pim_upstream *up; |
447 | struct listnode *upnode; | |
d62a17ae | 448 | |
449 | rp_info = XCALLOC(MTYPE_PIM_RP, sizeof(*rp_info)); | |
d62a17ae | 450 | |
d62a17ae | 451 | rp_info->rp.rpf_addr.family = AF_INET; |
452 | rp_info->rp.rpf_addr.prefixlen = IPV4_MAX_PREFIXLEN; | |
d0e418b4 | 453 | rp_info->rp.rpf_addr.u.prefix4 = rp_addr; |
454 | prefix_copy(&rp_info->group, &group); | |
455 | rp_info->rp_src = rp_src_flag; | |
d62a17ae | 456 | |
d0e418b4 | 457 | inet_ntop(AF_INET, &rp_info->rp.rpf_addr.u.prefix4, rp, sizeof(rp)); |
d62a17ae | 458 | |
459 | if (plist) { | |
460 | /* | |
461 | * Return if the prefix-list is already configured for this RP | |
462 | */ | |
d9c9a9ee | 463 | if (pim_rp_find_prefix_list(pim, rp_info->rp.rpf_addr.u.prefix4, |
d62a17ae | 464 | plist)) { |
465 | XFREE(MTYPE_PIM_RP, rp_info); | |
466 | return PIM_SUCCESS; | |
467 | } | |
468 | ||
469 | /* | |
470 | * Barf if the prefix-list is already configured for an RP | |
471 | */ | |
d9c9a9ee | 472 | if (pim_rp_prefix_list_used(pim, plist)) { |
d62a17ae | 473 | XFREE(MTYPE_PIM_RP, rp_info); |
474 | return PIM_RP_PFXLIST_IN_USE; | |
475 | } | |
476 | ||
477 | /* | |
478 | * Free any existing rp_info entries for this RP | |
479 | */ | |
d9c9a9ee | 480 | for (ALL_LIST_ELEMENTS(pim->rp_list, node, nnode, |
d62a17ae | 481 | tmp_rp_info)) { |
482 | if (rp_info->rp.rpf_addr.u.prefix4.s_addr | |
483 | == tmp_rp_info->rp.rpf_addr.u.prefix4.s_addr) { | |
484 | if (tmp_rp_info->plist) | |
d0e418b4 | 485 | pim_rp_del_config(pim, rp, NULL, |
486 | tmp_rp_info->plist); | |
d62a17ae | 487 | else |
d0e418b4 | 488 | pim_rp_del_config( |
fec883d9 | 489 | pim, rp, |
d62a17ae | 490 | prefix2str(&tmp_rp_info->group, |
491 | buffer, BUFSIZ), | |
492 | NULL); | |
493 | } | |
494 | } | |
495 | ||
496 | rp_info->plist = XSTRDUP(MTYPE_PIM_FILTER_NAME, plist); | |
497 | } else { | |
89b68082 | 498 | |
2e8345c1 DS |
499 | if (!str2prefix("224.0.0.0/4", &group_all)) { |
500 | XFREE(MTYPE_PIM_RP, rp_info); | |
501 | return PIM_GROUP_BAD_ADDRESS; | |
502 | } | |
d9c9a9ee | 503 | rp_all = pim_rp_find_match_group(pim, &group_all); |
d62a17ae | 504 | |
505 | /* | |
506 | * Barf if group is a non-multicast subnet | |
507 | */ | |
508 | if (!prefix_match(&rp_all->group, &rp_info->group)) { | |
509 | XFREE(MTYPE_PIM_RP, rp_info); | |
510 | return PIM_GROUP_BAD_ADDRESS; | |
511 | } | |
512 | ||
513 | /* | |
514 | * Remove any prefix-list rp_info entries for this RP | |
515 | */ | |
d9c9a9ee | 516 | for (ALL_LIST_ELEMENTS(pim->rp_list, node, nnode, |
d62a17ae | 517 | tmp_rp_info)) { |
518 | if (tmp_rp_info->plist | |
519 | && rp_info->rp.rpf_addr.u.prefix4.s_addr | |
520 | == tmp_rp_info->rp.rpf_addr.u.prefix4 | |
521 | .s_addr) { | |
d0e418b4 | 522 | pim_rp_del_config(pim, rp, NULL, |
523 | tmp_rp_info->plist); | |
d62a17ae | 524 | } |
525 | } | |
526 | ||
527 | /* | |
528 | * Take over the 224.0.0.0/4 group if the rp is INADDR_NONE | |
529 | */ | |
530 | if (prefix_same(&rp_all->group, &rp_info->group) | |
531 | && pim_rpf_addr_is_inaddr_none(&rp_all->rp)) { | |
532 | rp_all->rp.rpf_addr = rp_info->rp.rpf_addr; | |
d0e418b4 | 533 | rp_all->rp_src = rp_src_flag; |
d62a17ae | 534 | XFREE(MTYPE_PIM_RP, rp_info); |
535 | ||
536 | /* Register addr with Zebra NHT */ | |
537 | nht_p.family = AF_INET; | |
538 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
539 | nht_p.u.prefix4 = | |
540 | rp_all->rp.rpf_addr.u.prefix4; // RP address | |
3d225d48 | 541 | if (PIM_DEBUG_PIM_NHT_RP) { |
d62a17ae | 542 | char buf[PREFIX2STR_BUFFER]; |
543 | char buf1[PREFIX2STR_BUFFER]; | |
544 | prefix2str(&nht_p, buf, sizeof(buf)); | |
545 | prefix2str(&rp_all->group, buf1, sizeof(buf1)); | |
546 | zlog_debug( | |
547 | "%s: NHT Register rp_all addr %s grp %s ", | |
548 | __PRETTY_FUNCTION__, buf, buf1); | |
549 | } | |
28309df0 SP |
550 | |
551 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, | |
552 | up)) { | |
553 | /* Find (*, G) upstream whose RP is not | |
554 | * configured yet | |
555 | */ | |
556 | if ((up->upstream_addr.s_addr == INADDR_ANY) | |
557 | && (up->sg.src.s_addr == INADDR_ANY)) { | |
558 | struct prefix grp; | |
559 | struct rp_info *trp_info; | |
560 | ||
561 | grp.family = AF_INET; | |
562 | grp.prefixlen = IPV4_MAX_BITLEN; | |
563 | grp.u.prefix4 = up->sg.grp; | |
d0e418b4 | 564 | trp_info = pim_rp_find_match_group( |
565 | pim, &grp); | |
28309df0 SP |
566 | if (trp_info == rp_all) |
567 | pim_upstream_update(pim, up); | |
568 | } | |
569 | } | |
570 | ||
5bd51314 DS |
571 | pim_rp_check_interfaces(pim, rp_all); |
572 | pim_rp_refresh_group_to_rp_mapping(pim); | |
43763b11 | 573 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_all, |
4533b847 | 574 | false, NULL); |
575 | ||
43763b11 DS |
576 | if (!pim_ecmp_nexthop_lookup(pim, |
577 | &rp_all->rp.source_nexthop, | |
578 | &nht_p, &rp_all->group, 1)) | |
579 | return PIM_RP_NO_PATH; | |
d62a17ae | 580 | return PIM_SUCCESS; |
581 | } | |
582 | ||
583 | /* | |
584 | * Return if the group is already configured for this RP | |
585 | */ | |
d0e418b4 | 586 | tmp_rp_info = pim_rp_find_exact( |
587 | pim, rp_info->rp.rpf_addr.u.prefix4, &rp_info->group); | |
588 | if (tmp_rp_info) { | |
589 | if ((tmp_rp_info->rp_src != rp_src_flag) | |
590 | && (rp_src_flag == RP_SRC_STATIC)) | |
591 | tmp_rp_info->rp_src = rp_src_flag; | |
d62a17ae | 592 | XFREE(MTYPE_PIM_RP, rp_info); |
d0e418b4 | 593 | return result; |
d62a17ae | 594 | } |
595 | ||
596 | /* | |
597 | * Barf if this group is already covered by some other RP | |
598 | */ | |
d9c9a9ee | 599 | tmp_rp_info = pim_rp_find_match_group(pim, &rp_info->group); |
d62a17ae | 600 | |
601 | if (tmp_rp_info) { | |
602 | if (tmp_rp_info->plist) { | |
603 | XFREE(MTYPE_PIM_RP, rp_info); | |
604 | return PIM_GROUP_PFXLIST_OVERLAP; | |
605 | } else { | |
606 | /* | |
607 | * If the only RP that covers this group is an | |
608 | * RP configured for | |
609 | * 224.0.0.0/4 that is fine, ignore that one. | |
610 | * For all others | |
611 | * though we must return PIM_GROUP_OVERLAP | |
612 | */ | |
89b68082 DS |
613 | if (prefix_same(&rp_info->group, |
614 | &tmp_rp_info->group)) { | |
d0e418b4 | 615 | if ((rp_src_flag == RP_SRC_STATIC) |
616 | && (tmp_rp_info->rp_src | |
617 | == RP_SRC_STATIC)) { | |
618 | XFREE(MTYPE_PIM_RP, rp_info); | |
619 | return PIM_GROUP_OVERLAP; | |
620 | } | |
621 | ||
622 | result = pim_rp_change( | |
623 | pim, | |
624 | rp_info->rp.rpf_addr.u.prefix4, | |
625 | tmp_rp_info->group, | |
626 | rp_src_flag); | |
d62a17ae | 627 | XFREE(MTYPE_PIM_RP, rp_info); |
d0e418b4 | 628 | return result; |
d62a17ae | 629 | } |
630 | } | |
631 | } | |
632 | } | |
633 | ||
d9c9a9ee | 634 | listnode_add_sort(pim->rp_list, rp_info); |
89b68082 | 635 | rn = route_node_get(pim->rp_table, &rp_info->group); |
89b68082 DS |
636 | rn->info = rp_info; |
637 | ||
23fc858a | 638 | if (PIM_DEBUG_PIM_TRACE) { |
89b68082 DS |
639 | char buf[PREFIX_STRLEN]; |
640 | ||
996c9314 LB |
641 | zlog_debug("Allocated: %p for rp_info: %p(%s) Lock: %d", rn, |
642 | rp_info, | |
89b68082 DS |
643 | prefix2str(&rp_info->group, buf, sizeof(buf)), |
644 | rn->lock); | |
645 | } | |
d62a17ae | 646 | |
28309df0 SP |
647 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, up)) { |
648 | if (up->sg.src.s_addr == INADDR_ANY) { | |
649 | struct prefix grp; | |
650 | struct rp_info *trp_info; | |
651 | ||
652 | grp.family = AF_INET; | |
653 | grp.prefixlen = IPV4_MAX_BITLEN; | |
654 | grp.u.prefix4 = up->sg.grp; | |
655 | trp_info = pim_rp_find_match_group(pim, &grp); | |
656 | ||
657 | if (trp_info == rp_info) | |
658 | pim_upstream_update(pim, up); | |
659 | } | |
660 | } | |
661 | ||
5bd51314 DS |
662 | pim_rp_check_interfaces(pim, rp_info); |
663 | pim_rp_refresh_group_to_rp_mapping(pim); | |
664 | ||
d62a17ae | 665 | /* Register addr with Zebra NHT */ |
666 | nht_p.family = AF_INET; | |
667 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
668 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
3d225d48 | 669 | if (PIM_DEBUG_PIM_NHT_RP) { |
d62a17ae | 670 | char buf[PREFIX2STR_BUFFER]; |
671 | char buf1[PREFIX2STR_BUFFER]; | |
672 | prefix2str(&nht_p, buf, sizeof(buf)); | |
673 | prefix2str(&rp_info->group, buf1, sizeof(buf1)); | |
674 | zlog_debug("%s: NHT Register RP addr %s grp %s with Zebra ", | |
675 | __PRETTY_FUNCTION__, buf, buf1); | |
676 | } | |
4533b847 | 677 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, false, NULL); |
43763b11 DS |
678 | if (!pim_ecmp_nexthop_lookup(pim, &rp_info->rp.source_nexthop, &nht_p, |
679 | &rp_info->group, 1)) | |
680 | return PIM_RP_NO_PATH; | |
d62a17ae | 681 | |
d62a17ae | 682 | return PIM_SUCCESS; |
75a26779 DS |
683 | } |
684 | ||
d0e418b4 | 685 | int pim_rp_del_config(struct pim_instance *pim, const char *rp, |
686 | const char *group_range, const char *plist) | |
75a26779 | 687 | { |
d62a17ae | 688 | struct prefix group; |
689 | struct in_addr rp_addr; | |
d62a17ae | 690 | int result; |
d62a17ae | 691 | |
692 | if (group_range == NULL) | |
693 | result = str2prefix("224.0.0.0/4", &group); | |
694 | else | |
695 | result = str2prefix(group_range, &group); | |
696 | ||
697 | if (!result) | |
698 | return PIM_GROUP_BAD_ADDRESS; | |
699 | ||
700 | result = inet_pton(AF_INET, rp, &rp_addr); | |
701 | if (result <= 0) | |
702 | return PIM_RP_BAD_ADDRESS; | |
703 | ||
d0e418b4 | 704 | result = pim_rp_del(pim, rp_addr, group, plist, RP_SRC_STATIC); |
705 | return result; | |
706 | } | |
707 | ||
708 | int pim_rp_del(struct pim_instance *pim, struct in_addr rp_addr, | |
709 | struct prefix group, const char *plist, | |
710 | enum rp_source rp_src_flag) | |
711 | { | |
712 | struct prefix g_all; | |
713 | struct rp_info *rp_info; | |
714 | struct rp_info *rp_all; | |
715 | struct prefix nht_p; | |
716 | struct route_node *rn; | |
717 | bool was_plist = false; | |
718 | struct rp_info *trp_info; | |
719 | struct pim_upstream *up; | |
720 | struct listnode *upnode; | |
721 | struct bsgrp_node *bsgrp = NULL; | |
722 | struct bsm_rpinfo *bsrp = NULL; | |
723 | char grp_str[PREFIX2STR_BUFFER]; | |
724 | char rp_str[INET_ADDRSTRLEN]; | |
725 | ||
726 | if (!inet_ntop(AF_INET, &rp_addr, rp_str, sizeof(rp_str))) | |
727 | sprintf(rp_str, "<rp?>"); | |
728 | prefix2str(&group, grp_str, sizeof(grp_str)); | |
729 | ||
d62a17ae | 730 | if (plist) |
d9c9a9ee | 731 | rp_info = pim_rp_find_prefix_list(pim, rp_addr, plist); |
d62a17ae | 732 | else |
d9c9a9ee | 733 | rp_info = pim_rp_find_exact(pim, rp_addr, &group); |
d62a17ae | 734 | |
735 | if (!rp_info) | |
736 | return PIM_RP_NOT_FOUND; | |
737 | ||
738 | if (rp_info->plist) { | |
739 | XFREE(MTYPE_PIM_FILTER_NAME, rp_info->plist); | |
89b68082 | 740 | was_plist = true; |
d62a17ae | 741 | } |
742 | ||
23fc858a | 743 | if (PIM_DEBUG_PIM_TRACE) |
d0e418b4 | 744 | zlog_debug("%s: Delete RP %s for the group %s", |
745 | __PRETTY_FUNCTION__, rp_str, grp_str); | |
746 | ||
747 | /* While static RP is getting deleted, we need to check if dynamic RP | |
748 | * present for the same group in BSM RP table, then install the dynamic | |
749 | * RP for the group node into the main rp table | |
750 | */ | |
751 | if (rp_src_flag == RP_SRC_STATIC) { | |
752 | bsgrp = pim_bsm_get_bsgrp_node(&pim->global_scope, &group); | |
753 | ||
754 | if (bsgrp) { | |
755 | bsrp = listnode_head(bsgrp->bsrp_list); | |
756 | if (bsrp) { | |
23fc858a | 757 | if (PIM_DEBUG_PIM_TRACE) { |
d0e418b4 | 758 | char bsrp_str[INET_ADDRSTRLEN]; |
759 | ||
760 | if (!inet_ntop(AF_INET, bsrp, bsrp_str, | |
761 | sizeof(bsrp_str))) | |
762 | sprintf(bsrp_str, "<bsrp?>"); | |
763 | ||
764 | zlog_debug("%s: BSM RP %s found for the group %s", | |
765 | __PRETTY_FUNCTION__, | |
766 | bsrp_str, grp_str); | |
767 | } | |
768 | return pim_rp_change(pim, bsrp->rp_address, | |
769 | group, RP_SRC_BSR); | |
770 | } | |
771 | } else { | |
23fc858a | 772 | if (PIM_DEBUG_PIM_TRACE) |
d0e418b4 | 773 | zlog_debug( |
774 | "%s: BSM RP not found for the group %s", | |
775 | __PRETTY_FUNCTION__, grp_str); | |
776 | } | |
777 | } | |
778 | ||
d62a17ae | 779 | /* Deregister addr with Zebra NHT */ |
780 | nht_p.family = AF_INET; | |
781 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
782 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
3d225d48 | 783 | if (PIM_DEBUG_PIM_NHT_RP) { |
d62a17ae | 784 | char buf[PREFIX2STR_BUFFER]; |
785 | prefix2str(&nht_p, buf, sizeof(buf)); | |
786 | zlog_debug("%s: Deregister RP addr %s with Zebra ", | |
787 | __PRETTY_FUNCTION__, buf); | |
788 | } | |
4533b847 | 789 | pim_delete_tracked_nexthop(pim, &nht_p, NULL, rp_info, false); |
d62a17ae | 790 | |
e691f179 DS |
791 | if (!str2prefix("224.0.0.0/4", &g_all)) |
792 | return PIM_RP_BAD_ADDRESS; | |
793 | ||
d9c9a9ee | 794 | rp_all = pim_rp_find_match_group(pim, &g_all); |
d62a17ae | 795 | |
796 | if (rp_all == rp_info) { | |
8cfd7268 SP |
797 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, up)) { |
798 | /* Find the upstream (*, G) whose upstream address is | |
799 | * same as the deleted RP | |
800 | */ | |
d0e418b4 | 801 | if ((up->upstream_addr.s_addr |
802 | == rp_info->rp.rpf_addr.u.prefix4.s_addr) | |
803 | && (up->sg.src.s_addr == INADDR_ANY)) { | |
8cfd7268 SP |
804 | struct prefix grp; |
805 | grp.family = AF_INET; | |
806 | grp.prefixlen = IPV4_MAX_BITLEN; | |
807 | grp.u.prefix4 = up->sg.grp; | |
808 | trp_info = pim_rp_find_match_group(pim, &grp); | |
809 | if (trp_info == rp_all) { | |
810 | pim_upstream_rpf_clear(pim, up); | |
811 | up->upstream_addr.s_addr = INADDR_ANY; | |
812 | } | |
813 | } | |
814 | } | |
d62a17ae | 815 | rp_all->rp.rpf_addr.family = AF_INET; |
816 | rp_all->rp.rpf_addr.u.prefix4.s_addr = INADDR_NONE; | |
817 | rp_all->i_am_rp = 0; | |
818 | return PIM_SUCCESS; | |
819 | } | |
820 | ||
d9c9a9ee | 821 | listnode_delete(pim->rp_list, rp_info); |
89b68082 DS |
822 | |
823 | if (!was_plist) { | |
824 | rn = route_node_get(pim->rp_table, &rp_info->group); | |
825 | if (rn) { | |
826 | if (rn->info != rp_info) | |
af4c2728 | 827 | flog_err( |
450971aa | 828 | EC_LIB_DEVELOPMENT, |
3613d898 | 829 | "Expected rn->info to be equal to rp_info"); |
89b68082 | 830 | |
23fc858a | 831 | if (PIM_DEBUG_PIM_TRACE) { |
89b68082 DS |
832 | char buf[PREFIX_STRLEN]; |
833 | ||
996c9314 LB |
834 | zlog_debug( |
835 | "%s:Found for Freeing: %p for rp_info: %p(%s) Lock: %d", | |
836 | __PRETTY_FUNCTION__, rn, rp_info, | |
837 | prefix2str(&rp_info->group, buf, | |
838 | sizeof(buf)), | |
839 | rn->lock); | |
89b68082 DS |
840 | } |
841 | rn->info = NULL; | |
842 | route_unlock_node(rn); | |
843 | route_unlock_node(rn); | |
844 | } | |
845 | } | |
846 | ||
472ad383 | 847 | pim_rp_refresh_group_to_rp_mapping(pim); |
093c928f | 848 | |
8cfd7268 SP |
849 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, up)) { |
850 | /* Find the upstream (*, G) whose upstream address is same as | |
851 | * the deleted RP | |
852 | */ | |
d0e418b4 | 853 | if ((up->upstream_addr.s_addr |
854 | == rp_info->rp.rpf_addr.u.prefix4.s_addr) | |
855 | && (up->sg.src.s_addr == INADDR_ANY)) { | |
8cfd7268 SP |
856 | struct prefix grp; |
857 | ||
858 | grp.family = AF_INET; | |
859 | grp.prefixlen = IPV4_MAX_BITLEN; | |
860 | grp.u.prefix4 = up->sg.grp; | |
861 | ||
862 | trp_info = pim_rp_find_match_group(pim, &grp); | |
863 | ||
864 | /* RP not found for the group grp */ | |
865 | if (pim_rpf_addr_is_inaddr_none(&trp_info->rp)) { | |
866 | pim_upstream_rpf_clear(pim, up); | |
d0e418b4 | 867 | pim_rp_set_upstream_addr( |
868 | pim, &up->upstream_addr, up->sg.src, | |
869 | up->sg.grp); | |
8cfd7268 SP |
870 | } |
871 | ||
872 | /* RP found for the group grp */ | |
873 | else | |
874 | pim_upstream_update(pim, up); | |
875 | } | |
876 | } | |
877 | ||
093c928f | 878 | XFREE(MTYPE_PIM_RP, rp_info); |
d62a17ae | 879 | return PIM_SUCCESS; |
75a26779 | 880 | } |
13afbd05 | 881 | |
d0e418b4 | 882 | int pim_rp_change(struct pim_instance *pim, struct in_addr new_rp_addr, |
883 | struct prefix group, enum rp_source rp_src_flag) | |
884 | { | |
885 | struct prefix nht_p; | |
886 | struct route_node *rn; | |
887 | int result = 0; | |
888 | struct rp_info *rp_info = NULL; | |
889 | struct pim_upstream *up; | |
890 | struct listnode *upnode; | |
891 | ||
892 | rn = route_node_lookup(pim->rp_table, &group); | |
893 | if (!rn) { | |
894 | result = pim_rp_new(pim, new_rp_addr, group, NULL, rp_src_flag); | |
895 | return result; | |
896 | } | |
897 | ||
898 | rp_info = rn->info; | |
899 | ||
900 | if (!rp_info) { | |
901 | route_unlock_node(rn); | |
902 | result = pim_rp_new(pim, new_rp_addr, group, NULL, rp_src_flag); | |
903 | return result; | |
904 | } | |
905 | ||
906 | if (rp_info->rp.rpf_addr.u.prefix4.s_addr == new_rp_addr.s_addr) { | |
907 | if (rp_info->rp_src != rp_src_flag) { | |
908 | rp_info->rp_src = rp_src_flag; | |
909 | route_unlock_node(rn); | |
910 | return PIM_SUCCESS; | |
911 | } | |
912 | } | |
913 | ||
35a30302 DS |
914 | nht_p.family = AF_INET; |
915 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
916 | ||
d0e418b4 | 917 | /* Deregister old RP addr with Zebra NHT */ |
918 | if (rp_info->rp.rpf_addr.u.prefix4.s_addr != INADDR_ANY) { | |
d0e418b4 | 919 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; |
920 | if (PIM_DEBUG_PIM_NHT_RP) { | |
921 | char buf[PREFIX2STR_BUFFER]; | |
922 | ||
923 | prefix2str(&nht_p, buf, sizeof(buf)); | |
924 | zlog_debug("%s: Deregister RP addr %s with Zebra ", | |
925 | __PRETTY_FUNCTION__, buf); | |
926 | } | |
927 | pim_delete_tracked_nexthop(pim, &nht_p, NULL, rp_info, false); | |
928 | } | |
929 | ||
930 | pim_rp_nexthop_del(rp_info); | |
931 | listnode_delete(pim->rp_list, rp_info); | |
932 | /* Update the new RP address*/ | |
933 | rp_info->rp.rpf_addr.u.prefix4 = new_rp_addr; | |
934 | rp_info->rp_src = rp_src_flag; | |
935 | rp_info->i_am_rp = 0; | |
936 | ||
937 | listnode_add_sort(pim->rp_list, rp_info); | |
938 | ||
939 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, up)) { | |
940 | if (up->sg.src.s_addr == INADDR_ANY) { | |
941 | struct prefix grp; | |
942 | struct rp_info *trp_info; | |
943 | ||
944 | grp.family = AF_INET; | |
945 | grp.prefixlen = IPV4_MAX_BITLEN; | |
946 | grp.u.prefix4 = up->sg.grp; | |
947 | trp_info = pim_rp_find_match_group(pim, &grp); | |
948 | ||
949 | if (trp_info == rp_info) | |
950 | pim_upstream_update(pim, up); | |
951 | } | |
952 | } | |
953 | ||
954 | /* Register new RP addr with Zebra NHT */ | |
955 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
956 | if (PIM_DEBUG_PIM_NHT_RP) { | |
957 | char buf[PREFIX2STR_BUFFER]; | |
958 | char buf1[PREFIX2STR_BUFFER]; | |
959 | ||
960 | prefix2str(&nht_p, buf, sizeof(buf)); | |
961 | prefix2str(&rp_info->group, buf1, sizeof(buf1)); | |
962 | zlog_debug("%s: NHT Register RP addr %s grp %s with Zebra ", | |
963 | __PRETTY_FUNCTION__, buf, buf1); | |
964 | } | |
965 | ||
966 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, false, NULL); | |
967 | if (!pim_ecmp_nexthop_lookup(pim, &rp_info->rp.source_nexthop, &nht_p, | |
968 | &rp_info->group, 1)) { | |
969 | route_unlock_node(rn); | |
970 | return PIM_RP_NO_PATH; | |
971 | } | |
972 | ||
973 | pim_rp_check_interfaces(pim, rp_info); | |
974 | ||
975 | route_unlock_node(rn); | |
976 | ||
977 | pim_rp_refresh_group_to_rp_mapping(pim); | |
978 | ||
979 | return result; | |
980 | } | |
981 | ||
fec883d9 | 982 | void pim_rp_setup(struct pim_instance *pim) |
13afbd05 | 983 | { |
d62a17ae | 984 | struct listnode *node; |
985 | struct rp_info *rp_info; | |
d62a17ae | 986 | struct prefix nht_p; |
d62a17ae | 987 | |
d9c9a9ee | 988 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 989 | if (rp_info->rp.rpf_addr.u.prefix4.s_addr == INADDR_NONE) |
990 | continue; | |
991 | ||
992 | nht_p.family = AF_INET; | |
993 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
994 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
8cfd7268 | 995 | |
4533b847 | 996 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, false, |
997 | NULL); | |
43763b11 DS |
998 | if (!pim_ecmp_nexthop_lookup(pim, &rp_info->rp.source_nexthop, |
999 | &nht_p, &rp_info->group, 1)) | |
1000 | if (PIM_DEBUG_PIM_NHT_RP) | |
d62a17ae | 1001 | zlog_debug( |
43763b11 | 1002 | "Unable to lookup nexthop for rp specified"); |
d62a17ae | 1003 | } |
13afbd05 DS |
1004 | } |
1005 | ||
54b97c74 | 1006 | /* |
7176984f | 1007 | * Checks to see if we should elect ourself the actual RP when new if |
1008 | * addresses are added against an interface. | |
54b97c74 | 1009 | */ |
d62a17ae | 1010 | void pim_rp_check_on_if_add(struct pim_interface *pim_ifp) |
54b97c74 | 1011 | { |
d62a17ae | 1012 | struct listnode *node; |
1013 | struct rp_info *rp_info; | |
1014 | bool i_am_rp_changed = false; | |
d9c9a9ee | 1015 | struct pim_instance *pim = pim_ifp->pim; |
d62a17ae | 1016 | |
d9c9a9ee | 1017 | if (pim->rp_list == NULL) |
d62a17ae | 1018 | return; |
1019 | ||
d9c9a9ee | 1020 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 1021 | if (pim_rpf_addr_is_inaddr_none(&rp_info->rp)) |
1022 | continue; | |
1023 | ||
1024 | /* if i_am_rp is already set nothing to be done (adding new | |
1025 | * addresses | |
1026 | * is not going to make a difference). */ | |
1027 | if (rp_info->i_am_rp) { | |
1028 | continue; | |
1029 | } | |
1030 | ||
1031 | if (pim_rp_check_interface_addrs(rp_info, pim_ifp)) { | |
1032 | i_am_rp_changed = true; | |
1033 | rp_info->i_am_rp = 1; | |
3d225d48 | 1034 | if (PIM_DEBUG_PIM_NHT_RP) { |
d62a17ae | 1035 | char rp[PREFIX_STRLEN]; |
1036 | pim_addr_dump("<rp?>", &rp_info->rp.rpf_addr, | |
1037 | rp, sizeof(rp)); | |
1038 | zlog_debug("%s: %s: i am rp", __func__, rp); | |
1039 | } | |
1040 | } | |
1041 | } | |
1042 | ||
1043 | if (i_am_rp_changed) { | |
472ad383 | 1044 | pim_msdp_i_am_rp_changed(pim); |
a749b900 | 1045 | pim_upstream_reeval_use_rpt(pim); |
d62a17ae | 1046 | } |
7176984f | 1047 | } |
36d6bd7d | 1048 | |
7176984f | 1049 | /* up-optimized re-evaluation of "i_am_rp". this is used when ifaddresses |
1050 | * are removed. Removing numbers is an uncommon event in an active network | |
1051 | * so I have made no attempt to optimize it. */ | |
fec883d9 | 1052 | void pim_i_am_rp_re_evaluate(struct pim_instance *pim) |
7176984f | 1053 | { |
d62a17ae | 1054 | struct listnode *node; |
1055 | struct rp_info *rp_info; | |
1056 | bool i_am_rp_changed = false; | |
1057 | int old_i_am_rp; | |
1058 | ||
d9c9a9ee | 1059 | if (pim->rp_list == NULL) |
d62a17ae | 1060 | return; |
1061 | ||
d9c9a9ee | 1062 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 1063 | if (pim_rpf_addr_is_inaddr_none(&rp_info->rp)) |
1064 | continue; | |
1065 | ||
1066 | old_i_am_rp = rp_info->i_am_rp; | |
fec883d9 | 1067 | pim_rp_check_interfaces(pim, rp_info); |
d62a17ae | 1068 | |
1069 | if (old_i_am_rp != rp_info->i_am_rp) { | |
1070 | i_am_rp_changed = true; | |
3d225d48 | 1071 | if (PIM_DEBUG_PIM_NHT_RP) { |
d62a17ae | 1072 | char rp[PREFIX_STRLEN]; |
1073 | pim_addr_dump("<rp?>", &rp_info->rp.rpf_addr, | |
1074 | rp, sizeof(rp)); | |
1075 | if (rp_info->i_am_rp) { | |
1076 | zlog_debug("%s: %s: i am rp", __func__, | |
1077 | rp); | |
1078 | } else { | |
1079 | zlog_debug("%s: %s: i am no longer rp", | |
1080 | __func__, rp); | |
1081 | } | |
1082 | } | |
1083 | } | |
1084 | } | |
1085 | ||
1086 | if (i_am_rp_changed) { | |
472ad383 | 1087 | pim_msdp_i_am_rp_changed(pim); |
a749b900 | 1088 | pim_upstream_reeval_use_rpt(pim); |
d62a17ae | 1089 | } |
54b97c74 DS |
1090 | } |
1091 | ||
1092 | /* | |
1093 | * I_am_RP(G) is true if the group-to-RP mapping indicates that | |
1094 | * this router is the RP for the group. | |
1095 | * | |
1096 | * Since we only have static RP, all groups are part of this RP | |
1097 | */ | |
d9c9a9ee | 1098 | int pim_rp_i_am_rp(struct pim_instance *pim, struct in_addr group) |
54b97c74 | 1099 | { |
d62a17ae | 1100 | struct prefix g; |
1101 | struct rp_info *rp_info; | |
36d6bd7d | 1102 | |
d62a17ae | 1103 | memset(&g, 0, sizeof(g)); |
1104 | g.family = AF_INET; | |
1105 | g.prefixlen = 32; | |
1106 | g.u.prefix4 = group; | |
36d6bd7d | 1107 | |
d9c9a9ee | 1108 | rp_info = pim_rp_find_match_group(pim, &g); |
36d6bd7d | 1109 | |
d62a17ae | 1110 | if (rp_info) |
1111 | return rp_info->i_am_rp; | |
36d6bd7d | 1112 | |
d62a17ae | 1113 | return 0; |
54b97c74 DS |
1114 | } |
1115 | ||
71694057 DS |
1116 | /* |
1117 | * RP(G) | |
1118 | * | |
1119 | * Return the RP that the Group belongs too. | |
1120 | */ | |
fec883d9 | 1121 | struct pim_rpf *pim_rp_g(struct pim_instance *pim, struct in_addr group) |
71694057 | 1122 | { |
d62a17ae | 1123 | struct prefix g; |
1124 | struct rp_info *rp_info; | |
1125 | ||
1126 | memset(&g, 0, sizeof(g)); | |
1127 | g.family = AF_INET; | |
1128 | g.prefixlen = 32; | |
1129 | g.u.prefix4 = group; | |
1130 | ||
d9c9a9ee | 1131 | rp_info = pim_rp_find_match_group(pim, &g); |
d62a17ae | 1132 | |
1133 | if (rp_info) { | |
1134 | struct prefix nht_p; | |
43763b11 | 1135 | |
d62a17ae | 1136 | /* Register addr with Zebra NHT */ |
1137 | nht_p.family = AF_INET; | |
1138 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
1139 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
3d225d48 | 1140 | if (PIM_DEBUG_PIM_NHT_RP) { |
d62a17ae | 1141 | char buf[PREFIX2STR_BUFFER]; |
1142 | char buf1[PREFIX2STR_BUFFER]; | |
1143 | prefix2str(&nht_p, buf, sizeof(buf)); | |
1144 | prefix2str(&rp_info->group, buf1, sizeof(buf1)); | |
1145 | zlog_debug( | |
1146 | "%s: NHT Register RP addr %s grp %s with Zebra", | |
1147 | __PRETTY_FUNCTION__, buf, buf1); | |
1148 | } | |
4533b847 | 1149 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, false, |
1150 | NULL); | |
43763b11 DS |
1151 | pim_rpf_set_refresh_time(pim); |
1152 | (void)pim_ecmp_nexthop_lookup(pim, &rp_info->rp.source_nexthop, | |
1153 | &nht_p, &rp_info->group, 1); | |
d62a17ae | 1154 | return (&rp_info->rp); |
1155 | } | |
1156 | ||
1157 | // About to Go Down | |
1158 | return NULL; | |
71694057 DS |
1159 | } |
1160 | ||
8f5f5e91 DS |
1161 | /* |
1162 | * Set the upstream IP address we want to talk to based upon | |
1163 | * the rp configured and the source address | |
1164 | * | |
1165 | * If we have don't have a RP configured and the source address is * | |
732c209c | 1166 | * then set the upstream addr as INADDR_ANY and return failure. |
8f5f5e91 DS |
1167 | * |
1168 | */ | |
d9c9a9ee DS |
1169 | int pim_rp_set_upstream_addr(struct pim_instance *pim, struct in_addr *up, |
1170 | struct in_addr source, struct in_addr group) | |
8f5f5e91 | 1171 | { |
d62a17ae | 1172 | struct rp_info *rp_info; |
1173 | struct prefix g; | |
36d6bd7d | 1174 | |
d62a17ae | 1175 | memset(&g, 0, sizeof(g)); |
1176 | g.family = AF_INET; | |
1177 | g.prefixlen = 32; | |
1178 | g.u.prefix4 = group; | |
36d6bd7d | 1179 | |
d9c9a9ee | 1180 | rp_info = pim_rp_find_match_group(pim, &g); |
36d6bd7d | 1181 | |
d62a17ae | 1182 | if ((pim_rpf_addr_is_inaddr_none(&rp_info->rp)) |
1183 | && (source.s_addr == INADDR_ANY)) { | |
3d225d48 | 1184 | if (PIM_DEBUG_PIM_NHT_RP) |
d62a17ae | 1185 | zlog_debug("%s: Received a (*,G) with no RP configured", |
1186 | __PRETTY_FUNCTION__); | |
732c209c | 1187 | up->s_addr = INADDR_ANY; |
d62a17ae | 1188 | return 0; |
1189 | } | |
8f5f5e91 | 1190 | |
d62a17ae | 1191 | *up = (source.s_addr == INADDR_ANY) ? rp_info->rp.rpf_addr.u.prefix4 |
1192 | : source; | |
8f5f5e91 | 1193 | |
d62a17ae | 1194 | return 1; |
8f5f5e91 | 1195 | } |
75a26779 | 1196 | |
0c8b717e DS |
1197 | int pim_rp_config_write(struct pim_instance *pim, struct vty *vty, |
1198 | const char *spaces) | |
75a26779 | 1199 | { |
d62a17ae | 1200 | struct listnode *node; |
1201 | struct rp_info *rp_info; | |
1202 | char rp_buffer[32]; | |
1203 | char group_buffer[32]; | |
1204 | int count = 0; | |
1205 | ||
d9c9a9ee | 1206 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 1207 | if (pim_rpf_addr_is_inaddr_none(&rp_info->rp)) |
1208 | continue; | |
1209 | ||
d0e418b4 | 1210 | if (rp_info->rp_src == RP_SRC_BSR) |
1211 | continue; | |
1212 | ||
d62a17ae | 1213 | if (rp_info->plist) |
0c8b717e | 1214 | vty_out(vty, "%sip pim rp %s prefix-list %s\n", spaces, |
d62a17ae | 1215 | inet_ntop(AF_INET, |
1216 | &rp_info->rp.rpf_addr.u.prefix4, | |
1217 | rp_buffer, 32), | |
1218 | rp_info->plist); | |
1219 | else | |
0c8b717e | 1220 | vty_out(vty, "%sip pim rp %s %s\n", spaces, |
d62a17ae | 1221 | inet_ntop(AF_INET, |
1222 | &rp_info->rp.rpf_addr.u.prefix4, | |
1223 | rp_buffer, 32), | |
1224 | prefix2str(&rp_info->group, group_buffer, 32)); | |
1225 | count++; | |
1226 | } | |
1227 | ||
1228 | return count; | |
75a26779 DS |
1229 | } |
1230 | ||
f43593d9 DS |
1231 | bool pim_rp_check_is_my_ip_address(struct pim_instance *pim, |
1232 | struct in_addr dest_addr) | |
75a26779 | 1233 | { |
fec883d9 | 1234 | if (if_lookup_exact_address(&dest_addr, AF_INET, pim->vrf_id)) |
f43593d9 | 1235 | return true; |
d62a17ae | 1236 | |
f43593d9 | 1237 | return false; |
75a26779 | 1238 | } |
00d07c6f | 1239 | |
088f1098 | 1240 | void pim_rp_show_information(struct pim_instance *pim, struct vty *vty, bool uj) |
00d07c6f | 1241 | { |
d62a17ae | 1242 | struct rp_info *rp_info; |
1243 | struct rp_info *prev_rp_info = NULL; | |
1244 | struct listnode *node; | |
025725f7 | 1245 | char source[7]; |
d62a17ae | 1246 | |
1247 | json_object *json = NULL; | |
1248 | json_object *json_rp_rows = NULL; | |
1249 | json_object *json_row = NULL; | |
1250 | ||
1251 | if (uj) | |
1252 | json = json_object_new_object(); | |
1253 | else | |
1254 | vty_out(vty, | |
025725f7 | 1255 | "RP address group/prefix-list OIF I am RP Source\n"); |
d9c9a9ee | 1256 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 1257 | if (!pim_rpf_addr_is_inaddr_none(&rp_info->rp)) { |
1258 | char buf[48]; | |
1259 | ||
025725f7 | 1260 | if (rp_info->rp_src == RP_SRC_STATIC) |
1261 | strcpy(source, "Static"); | |
1262 | else if (rp_info->rp_src == RP_SRC_BSR) | |
1263 | strcpy(source, "BSR"); | |
1264 | else | |
1265 | strcpy(source, "None"); | |
d62a17ae | 1266 | if (uj) { |
1267 | /* | |
1268 | * If we have moved on to a new RP then add the | |
1269 | * entry for the previous RP | |
1270 | */ | |
1271 | if (prev_rp_info | |
1272 | && prev_rp_info->rp.rpf_addr.u.prefix4 | |
1273 | .s_addr | |
1274 | != rp_info->rp.rpf_addr.u.prefix4 | |
1275 | .s_addr) { | |
1276 | json_object_object_add( | |
1277 | json, | |
1278 | inet_ntoa(prev_rp_info->rp | |
1279 | .rpf_addr.u | |
1280 | .prefix4), | |
1281 | json_rp_rows); | |
1282 | json_rp_rows = NULL; | |
1283 | } | |
1284 | ||
1285 | if (!json_rp_rows) | |
1286 | json_rp_rows = json_object_new_array(); | |
1287 | ||
1288 | json_row = json_object_new_object(); | |
1289 | if (rp_info->rp.source_nexthop.interface) | |
1290 | json_object_string_add( | |
1291 | json_row, "outboundInterface", | |
1292 | rp_info->rp.source_nexthop | |
1293 | .interface->name); | |
1294 | ||
1295 | if (rp_info->i_am_rp) | |
1296 | json_object_boolean_true_add(json_row, | |
1297 | "iAmRP"); | |
1298 | ||
1299 | if (rp_info->plist) | |
1300 | json_object_string_add(json_row, | |
1301 | "prefixList", | |
1302 | rp_info->plist); | |
1303 | else | |
1304 | json_object_string_add( | |
1305 | json_row, "group", | |
1306 | prefix2str(&rp_info->group, buf, | |
1307 | 48)); | |
d0e418b4 | 1308 | json_object_string_add(json_row, "source", |
025725f7 | 1309 | source); |
d62a17ae | 1310 | |
1311 | json_object_array_add(json_rp_rows, json_row); | |
1312 | } else { | |
1313 | vty_out(vty, "%-15s ", | |
1314 | inet_ntoa(rp_info->rp.rpf_addr.u | |
1315 | .prefix4)); | |
1316 | ||
1317 | if (rp_info->plist) | |
1318 | vty_out(vty, "%-18s ", rp_info->plist); | |
1319 | else | |
1320 | vty_out(vty, "%-18s ", | |
1321 | prefix2str(&rp_info->group, buf, | |
1322 | 48)); | |
1323 | ||
1324 | if (rp_info->rp.source_nexthop.interface) | |
ff415346 | 1325 | vty_out(vty, "%-16s ", |
d62a17ae | 1326 | rp_info->rp.source_nexthop |
1327 | .interface->name); | |
1328 | else | |
ff415346 | 1329 | vty_out(vty, "%-16s ", "(Unknown)"); |
d62a17ae | 1330 | |
1331 | if (rp_info->i_am_rp) | |
1332 | vty_out(vty, "yes\n"); | |
1333 | else | |
025725f7 | 1334 | vty_out(vty, "no"); |
d62a17ae | 1335 | |
025725f7 | 1336 | vty_out(vty, "%14s\n", source); |
1337 | } | |
d62a17ae | 1338 | prev_rp_info = rp_info; |
1339 | } | |
1340 | } | |
1341 | ||
1342 | if (uj) { | |
1343 | if (prev_rp_info && json_rp_rows) | |
1344 | json_object_object_add( | |
1345 | json, | |
1346 | inet_ntoa(prev_rp_info->rp.rpf_addr.u.prefix4), | |
1347 | json_rp_rows); | |
1348 | ||
9d303b37 DL |
1349 | vty_out(vty, "%s\n", json_object_to_json_string_ext( |
1350 | json, JSON_C_TO_STRING_PRETTY)); | |
d62a17ae | 1351 | json_object_free(json); |
1352 | } | |
00d07c6f | 1353 | } |
cba44481 | 1354 | |
c9cd7fbc | 1355 | void pim_resolve_rp_nh(struct pim_instance *pim, struct pim_neighbor *nbr) |
cba44481 | 1356 | { |
d62a17ae | 1357 | struct listnode *node = NULL; |
1358 | struct rp_info *rp_info = NULL; | |
1359 | struct nexthop *nh_node = NULL; | |
1360 | struct prefix nht_p; | |
1361 | struct pim_nexthop_cache pnc; | |
d62a17ae | 1362 | |
d9c9a9ee | 1363 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 1364 | if (rp_info->rp.rpf_addr.u.prefix4.s_addr == INADDR_NONE) |
1365 | continue; | |
1366 | ||
1367 | nht_p.family = AF_INET; | |
1368 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
1369 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
1370 | memset(&pnc, 0, sizeof(struct pim_nexthop_cache)); | |
fec883d9 | 1371 | if (!pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, |
4533b847 | 1372 | false, &pnc)) |
cb9c7c50 DS |
1373 | continue; |
1374 | ||
1375 | for (nh_node = pnc.nexthop; nh_node; nh_node = nh_node->next) { | |
1376 | if (nh_node->gate.ipv4.s_addr != 0) | |
1377 | continue; | |
1378 | ||
1379 | struct interface *ifp1 = if_lookup_by_index( | |
fec883d9 | 1380 | nh_node->ifindex, pim->vrf_id); |
c9cd7fbc DS |
1381 | |
1382 | if (nbr->interface != ifp1) | |
cb9c7c50 DS |
1383 | continue; |
1384 | ||
1385 | nh_node->gate.ipv4 = nbr->source_addr; | |
3d225d48 | 1386 | if (PIM_DEBUG_PIM_NHT_RP) { |
cb9c7c50 DS |
1387 | char str[PREFIX_STRLEN]; |
1388 | char str1[INET_ADDRSTRLEN]; | |
1389 | pim_inet4_dump("<nht_nbr?>", nbr->source_addr, | |
1390 | str1, sizeof(str1)); | |
1391 | pim_addr_dump("<nht_addr?>", &nht_p, str, | |
1392 | sizeof(str)); | |
1393 | zlog_debug( | |
1394 | "%s: addr %s new nexthop addr %s interface %s", | |
1395 | __PRETTY_FUNCTION__, str, str1, | |
1396 | ifp1->name); | |
d62a17ae | 1397 | } |
1398 | } | |
1399 | } | |
cba44481 | 1400 | } |