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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" | |
36d6bd7d | 51 | |
c2cf4b02 DS |
52 | /* Cleanup pim->rpf_hash each node data */ |
53 | void pim_rp_list_hash_clean(void *data) | |
54 | { | |
7c591950 | 55 | struct pim_nexthop_cache *pnc = (struct pim_nexthop_cache *)data; |
c2cf4b02 | 56 | |
6a154c88 | 57 | list_delete(&pnc->rp_list); |
6e1ef388 | 58 | |
7c591950 DS |
59 | hash_clean(pnc->upstream_hash, NULL); |
60 | hash_free(pnc->upstream_hash); | |
61 | pnc->upstream_hash = NULL; | |
1159c202 SP |
62 | if (pnc->nexthop) |
63 | nexthops_free(pnc->nexthop); | |
6e1ef388 DS |
64 | |
65 | XFREE(MTYPE_PIM_NEXTHOP_CACHE, pnc); | |
c2cf4b02 DS |
66 | } |
67 | ||
d62a17ae | 68 | static void pim_rp_info_free(struct rp_info *rp_info) |
36d6bd7d | 69 | { |
0a22ddfb | 70 | XFREE(MTYPE_PIM_FILTER_NAME, rp_info->plist); |
ff823fc9 | 71 | |
d62a17ae | 72 | XFREE(MTYPE_PIM_RP, rp_info); |
36d6bd7d DS |
73 | } |
74 | ||
d62a17ae | 75 | int pim_rp_list_cmp(void *v1, void *v2) |
36d6bd7d | 76 | { |
d62a17ae | 77 | struct rp_info *rp1 = (struct rp_info *)v1; |
78 | struct rp_info *rp2 = (struct rp_info *)v2; | |
79 | ||
80 | /* | |
81 | * Sort by RP IP address | |
82 | */ | |
83 | if (rp1->rp.rpf_addr.u.prefix4.s_addr | |
84 | < rp2->rp.rpf_addr.u.prefix4.s_addr) | |
85 | return -1; | |
86 | ||
87 | if (rp1->rp.rpf_addr.u.prefix4.s_addr | |
88 | > rp2->rp.rpf_addr.u.prefix4.s_addr) | |
89 | return 1; | |
90 | ||
91 | /* | |
92 | * Sort by group IP address | |
93 | */ | |
94 | if (rp1->group.u.prefix4.s_addr < rp2->group.u.prefix4.s_addr) | |
95 | return -1; | |
96 | ||
97 | if (rp1->group.u.prefix4.s_addr > rp2->group.u.prefix4.s_addr) | |
98 | return 1; | |
99 | ||
100 | return 0; | |
36d6bd7d DS |
101 | } |
102 | ||
d9c9a9ee | 103 | void pim_rp_init(struct pim_instance *pim) |
36d6bd7d | 104 | { |
d62a17ae | 105 | struct rp_info *rp_info; |
89b68082 | 106 | struct route_node *rn; |
36d6bd7d | 107 | |
d9c9a9ee DS |
108 | pim->rp_list = list_new(); |
109 | pim->rp_list->del = (void (*)(void *))pim_rp_info_free; | |
110 | pim->rp_list->cmp = pim_rp_list_cmp; | |
36d6bd7d | 111 | |
89b68082 | 112 | pim->rp_table = route_table_init(); |
89b68082 | 113 | |
d62a17ae | 114 | rp_info = XCALLOC(MTYPE_PIM_RP, sizeof(*rp_info)); |
36d6bd7d | 115 | |
2e8345c1 | 116 | if (!str2prefix("224.0.0.0/4", &rp_info->group)) { |
450971aa | 117 | flog_err(EC_LIB_DEVELOPMENT, |
1c50c1c0 | 118 | "Unable to convert 224.0.0.0/4 to prefix"); |
6a154c88 | 119 | list_delete(&pim->rp_list); |
89b68082 | 120 | route_table_finish(pim->rp_table); |
2e8345c1 DS |
121 | XFREE(MTYPE_PIM_RP, rp_info); |
122 | return; | |
123 | } | |
d62a17ae | 124 | rp_info->group.family = AF_INET; |
125 | rp_info->rp.rpf_addr.family = AF_INET; | |
126 | rp_info->rp.rpf_addr.prefixlen = IPV4_MAX_PREFIXLEN; | |
127 | rp_info->rp.rpf_addr.u.prefix4.s_addr = INADDR_NONE; | |
36d6bd7d | 128 | |
d9c9a9ee | 129 | listnode_add(pim->rp_list, rp_info); |
89b68082 DS |
130 | |
131 | rn = route_node_get(pim->rp_table, &rp_info->group); | |
89b68082 DS |
132 | rn->info = rp_info; |
133 | if (PIM_DEBUG_TRACE) | |
996c9314 LB |
134 | zlog_debug( |
135 | "Allocated: %p for rp_info: %p(224.0.0.0/4) Lock: %d", | |
136 | rn, rp_info, rn->lock); | |
36d6bd7d DS |
137 | } |
138 | ||
d9c9a9ee | 139 | void pim_rp_free(struct pim_instance *pim) |
36d6bd7d | 140 | { |
d9c9a9ee | 141 | if (pim->rp_list) |
6a154c88 | 142 | list_delete(&pim->rp_list); |
36d6bd7d DS |
143 | } |
144 | ||
dfe43e25 DW |
145 | /* |
146 | * Given an RP's prefix-list, return the RP's rp_info for that prefix-list | |
147 | */ | |
d9c9a9ee DS |
148 | static struct rp_info *pim_rp_find_prefix_list(struct pim_instance *pim, |
149 | struct in_addr rp, | |
d62a17ae | 150 | const char *plist) |
36d6bd7d | 151 | { |
d62a17ae | 152 | struct listnode *node; |
153 | struct rp_info *rp_info; | |
154 | ||
d9c9a9ee | 155 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 156 | if (rp.s_addr == rp_info->rp.rpf_addr.u.prefix4.s_addr |
157 | && rp_info->plist && strcmp(rp_info->plist, plist) == 0) { | |
158 | return rp_info; | |
159 | } | |
160 | } | |
161 | ||
162 | return NULL; | |
36d6bd7d DS |
163 | } |
164 | ||
dfe43e25 DW |
165 | /* |
166 | * Return true if plist is used by any rp_info | |
167 | */ | |
d9c9a9ee | 168 | static int pim_rp_prefix_list_used(struct pim_instance *pim, const char *plist) |
dfe43e25 | 169 | { |
d62a17ae | 170 | struct listnode *node; |
171 | struct rp_info *rp_info; | |
172 | ||
d9c9a9ee | 173 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 174 | if (rp_info->plist && strcmp(rp_info->plist, plist) == 0) { |
175 | return 1; | |
176 | } | |
177 | } | |
178 | ||
179 | return 0; | |
dfe43e25 DW |
180 | } |
181 | ||
182 | /* | |
d62a17ae | 183 | * Given an RP's address, return the RP's rp_info that is an exact match for |
184 | * 'group' | |
dfe43e25 | 185 | */ |
d9c9a9ee DS |
186 | static struct rp_info *pim_rp_find_exact(struct pim_instance *pim, |
187 | struct in_addr rp, | |
123214ef | 188 | const struct prefix *group) |
36d6bd7d | 189 | { |
d62a17ae | 190 | struct listnode *node; |
191 | struct rp_info *rp_info; | |
36d6bd7d | 192 | |
d9c9a9ee | 193 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 194 | if (rp.s_addr == rp_info->rp.rpf_addr.u.prefix4.s_addr |
195 | && prefix_same(&rp_info->group, group)) | |
196 | return rp_info; | |
197 | } | |
54b97c74 | 198 | |
d62a17ae | 199 | return NULL; |
36d6bd7d DS |
200 | } |
201 | ||
dfe43e25 DW |
202 | /* |
203 | * Given a group, return the rp_info for that group | |
204 | */ | |
28309df0 | 205 | struct rp_info *pim_rp_find_match_group(struct pim_instance *pim, |
123214ef | 206 | const struct prefix *group) |
36d6bd7d | 207 | { |
d62a17ae | 208 | struct listnode *node; |
b77b1550 | 209 | struct rp_info *best = NULL; |
d62a17ae | 210 | struct rp_info *rp_info; |
211 | struct prefix_list *plist; | |
123214ef | 212 | const struct prefix *p, *bp; |
89b68082 | 213 | struct route_node *rn; |
d62a17ae | 214 | |
4646b86a | 215 | bp = NULL; |
d9c9a9ee | 216 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 217 | if (rp_info->plist) { |
218 | plist = prefix_list_lookup(AFI_IP, rp_info->plist); | |
219 | ||
996c9314 LB |
220 | if (prefix_list_apply_which_prefix(plist, &p, group) |
221 | == PREFIX_DENY) | |
b77b1550 DS |
222 | continue; |
223 | ||
224 | if (!best) { | |
225 | best = rp_info; | |
226 | bp = p; | |
227 | continue; | |
228 | } | |
229 | ||
4646b86a | 230 | if (bp && bp->prefixlen < p->prefixlen) { |
b77b1550 DS |
231 | best = rp_info; |
232 | bp = p; | |
233 | } | |
d62a17ae | 234 | } |
235 | } | |
236 | ||
89b68082 DS |
237 | rn = route_node_match(pim->rp_table, group); |
238 | if (!rn) { | |
af4c2728 | 239 | flog_err( |
450971aa | 240 | EC_LIB_DEVELOPMENT, |
996c9314 LB |
241 | "%s: BUG We should have found default group information\n", |
242 | __PRETTY_FUNCTION__); | |
89b68082 DS |
243 | return best; |
244 | } | |
245 | ||
246 | rp_info = rn->info; | |
247 | if (PIM_DEBUG_TRACE) { | |
248 | char buf[PREFIX_STRLEN]; | |
249 | ||
250 | route_unlock_node(rn); | |
996c9314 LB |
251 | zlog_debug("Lookedup: %p for rp_info: %p(%s) Lock: %d", rn, |
252 | rp_info, | |
89b68082 DS |
253 | prefix2str(&rp_info->group, buf, sizeof(buf)), |
254 | rn->lock); | |
255 | } | |
256 | ||
257 | if (!best) | |
258 | return rp_info; | |
259 | ||
260 | if (rp_info->group.prefixlen < best->group.prefixlen) | |
261 | best = rp_info; | |
262 | ||
b77b1550 | 263 | return best; |
36d6bd7d | 264 | } |
75a26779 | 265 | |
dfe43e25 DW |
266 | /* |
267 | * When the user makes "ip pim rp" configuration changes or if they change the | |
268 | * prefix-list(s) used by these statements we must tickle the upstream state | |
269 | * for each group to make them re-lookup who their RP should be. | |
270 | * | |
271 | * This is a placeholder function for now. | |
272 | */ | |
472ad383 | 273 | static void pim_rp_refresh_group_to_rp_mapping(struct pim_instance *pim) |
dfe43e25 | 274 | { |
472ad383 | 275 | pim_msdp_i_am_rp_changed(pim); |
dfe43e25 DW |
276 | } |
277 | ||
d9c9a9ee DS |
278 | void pim_rp_prefix_list_update(struct pim_instance *pim, |
279 | struct prefix_list *plist) | |
dfe43e25 | 280 | { |
d62a17ae | 281 | struct listnode *node; |
282 | struct rp_info *rp_info; | |
283 | int refresh_needed = 0; | |
284 | ||
d9c9a9ee | 285 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 286 | if (rp_info->plist |
287 | && strcmp(rp_info->plist, prefix_list_name(plist)) == 0) { | |
288 | refresh_needed = 1; | |
289 | break; | |
290 | } | |
291 | } | |
292 | ||
293 | if (refresh_needed) | |
472ad383 | 294 | pim_rp_refresh_group_to_rp_mapping(pim); |
dfe43e25 DW |
295 | } |
296 | ||
d62a17ae | 297 | static int pim_rp_check_interface_addrs(struct rp_info *rp_info, |
298 | struct pim_interface *pim_ifp) | |
7176984f | 299 | { |
d62a17ae | 300 | struct listnode *node; |
301 | struct pim_secondary_addr *sec_addr; | |
7176984f | 302 | |
d62a17ae | 303 | if (pim_ifp->primary_address.s_addr |
304 | == rp_info->rp.rpf_addr.u.prefix4.s_addr) | |
305 | return 1; | |
7176984f | 306 | |
d62a17ae | 307 | if (!pim_ifp->sec_addr_list) { |
308 | return 0; | |
309 | } | |
7176984f | 310 | |
d62a17ae | 311 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->sec_addr_list, node, sec_addr)) { |
312 | if (prefix_same(&sec_addr->addr, &rp_info->rp.rpf_addr)) { | |
313 | return 1; | |
314 | } | |
315 | } | |
7176984f | 316 | |
d62a17ae | 317 | return 0; |
7176984f | 318 | } |
319 | ||
fec883d9 DS |
320 | static void pim_rp_check_interfaces(struct pim_instance *pim, |
321 | struct rp_info *rp_info) | |
00d07c6f | 322 | { |
d62a17ae | 323 | struct interface *ifp; |
00d07c6f | 324 | |
d62a17ae | 325 | rp_info->i_am_rp = 0; |
451fda4f | 326 | FOR_ALL_INTERFACES (pim->vrf, ifp) { |
d62a17ae | 327 | struct pim_interface *pim_ifp = ifp->info; |
00d07c6f | 328 | |
d62a17ae | 329 | if (!pim_ifp) |
330 | continue; | |
00d07c6f | 331 | |
d62a17ae | 332 | if (pim_rp_check_interface_addrs(rp_info, pim_ifp)) { |
333 | rp_info->i_am_rp = 1; | |
334 | } | |
335 | } | |
00d07c6f DS |
336 | } |
337 | ||
28309df0 SP |
338 | void pim_upstream_update(struct pim_instance *pim, struct pim_upstream *up) |
339 | { | |
340 | struct pim_rpf old_rpf; | |
341 | enum pim_rpf_result rpf_result; | |
342 | struct in_addr old_upstream_addr; | |
343 | struct in_addr new_upstream_addr; | |
344 | struct prefix nht_p; | |
345 | ||
346 | old_upstream_addr = up->upstream_addr; | |
347 | pim_rp_set_upstream_addr(pim, &new_upstream_addr, up->sg.src, | |
348 | up->sg.grp); | |
349 | ||
350 | if (PIM_DEBUG_TRACE) | |
351 | zlog_debug("%s: pim upstream update for old upstream %s", | |
352 | __PRETTY_FUNCTION__, | |
353 | inet_ntoa(old_upstream_addr)); | |
354 | ||
355 | if (old_upstream_addr.s_addr == new_upstream_addr.s_addr) | |
356 | return; | |
357 | ||
358 | /* Lets consider a case, where a PIM upstream has a better RP as a | |
359 | * result of a new RP configuration with more precise group range. | |
360 | * This upstream has to be added to the upstream hash of new RP's | |
361 | * NHT(pnc) and has to be removed from old RP's NHT upstream hash | |
362 | */ | |
363 | if (old_upstream_addr.s_addr != INADDR_ANY) { | |
364 | /* Deregister addr with Zebra NHT */ | |
365 | nht_p.family = AF_INET; | |
366 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
367 | nht_p.u.prefix4 = old_upstream_addr; | |
368 | if (PIM_DEBUG_TRACE) { | |
369 | char buf[PREFIX2STR_BUFFER]; | |
370 | ||
371 | prefix2str(&nht_p, buf, sizeof(buf)); | |
372 | zlog_debug("%s: Deregister upstream %s addr %s with Zebra NHT", | |
373 | __PRETTY_FUNCTION__, up->sg_str, buf); | |
374 | } | |
375 | pim_delete_tracked_nexthop(pim, &nht_p, up, NULL); | |
376 | } | |
377 | ||
378 | /* Update the upstream address */ | |
379 | up->upstream_addr = new_upstream_addr; | |
380 | ||
381 | old_rpf.source_nexthop.interface = up->rpf.source_nexthop.interface; | |
382 | ||
383 | rpf_result = pim_rpf_update(pim, up, &old_rpf, 1); | |
384 | if (rpf_result == PIM_RPF_FAILURE) | |
385 | pim_mroute_del(up->channel_oil, __PRETTY_FUNCTION__); | |
386 | ||
387 | /* update kernel multicast forwarding cache (MFC) */ | |
388 | if (up->rpf.source_nexthop.interface && up->channel_oil) { | |
389 | ifindex_t ifindex = up->rpf.source_nexthop.interface->ifindex; | |
390 | int vif_index = pim_if_find_vifindex_by_ifindex(pim, ifindex); | |
391 | /* Pass Current selected NH vif index to mroute download */ | |
392 | if (vif_index) | |
393 | pim_scan_individual_oil(up->channel_oil, vif_index); | |
394 | else { | |
395 | if (PIM_DEBUG_PIM_NHT) | |
396 | zlog_debug( | |
397 | "%s: NHT upstream %s channel_oil IIF %s vif_index is not valid", | |
398 | __PRETTY_FUNCTION__, up->sg_str, | |
399 | up->rpf.source_nexthop.interface->name); | |
400 | } | |
401 | } | |
402 | ||
403 | if (rpf_result == PIM_RPF_CHANGED) | |
404 | pim_zebra_upstream_rpf_changed(pim, up, &old_rpf); | |
405 | ||
406 | pim_zebra_update_all_interfaces(pim); | |
407 | } | |
408 | ||
fec883d9 DS |
409 | int pim_rp_new(struct pim_instance *pim, const char *rp, |
410 | const char *group_range, const char *plist) | |
75a26779 | 411 | { |
d62a17ae | 412 | int result = 0; |
413 | struct rp_info *rp_info; | |
414 | struct rp_info *rp_all; | |
415 | struct prefix group_all; | |
416 | struct listnode *node, *nnode; | |
417 | struct rp_info *tmp_rp_info; | |
418 | char buffer[BUFSIZ]; | |
419 | struct prefix nht_p; | |
6b44b401 | 420 | struct prefix temp; |
89b68082 | 421 | struct route_node *rn; |
28309df0 SP |
422 | struct pim_upstream *up; |
423 | struct listnode *upnode; | |
d62a17ae | 424 | |
425 | rp_info = XCALLOC(MTYPE_PIM_RP, sizeof(*rp_info)); | |
d62a17ae | 426 | |
427 | if (group_range == NULL) | |
428 | result = str2prefix("224.0.0.0/4", &rp_info->group); | |
6b44b401 | 429 | else { |
d62a17ae | 430 | result = str2prefix(group_range, &rp_info->group); |
6b44b401 SP |
431 | if (result) { |
432 | prefix_copy(&temp, &rp_info->group); | |
433 | apply_mask(&temp); | |
434 | if (!prefix_same(&rp_info->group, &temp)) { | |
435 | XFREE(MTYPE_PIM_RP, rp_info); | |
436 | return PIM_GROUP_BAD_ADDR_MASK_COMBO; | |
437 | } | |
438 | } | |
439 | } | |
d62a17ae | 440 | |
441 | if (!result) { | |
442 | XFREE(MTYPE_PIM_RP, rp_info); | |
443 | return PIM_GROUP_BAD_ADDRESS; | |
444 | } | |
445 | ||
446 | rp_info->rp.rpf_addr.family = AF_INET; | |
447 | rp_info->rp.rpf_addr.prefixlen = IPV4_MAX_PREFIXLEN; | |
448 | result = inet_pton(rp_info->rp.rpf_addr.family, rp, | |
449 | &rp_info->rp.rpf_addr.u.prefix4); | |
450 | ||
451 | if (result <= 0) { | |
452 | XFREE(MTYPE_PIM_RP, rp_info); | |
453 | return PIM_RP_BAD_ADDRESS; | |
454 | } | |
455 | ||
456 | if (plist) { | |
457 | /* | |
458 | * Return if the prefix-list is already configured for this RP | |
459 | */ | |
d9c9a9ee | 460 | if (pim_rp_find_prefix_list(pim, rp_info->rp.rpf_addr.u.prefix4, |
d62a17ae | 461 | plist)) { |
462 | XFREE(MTYPE_PIM_RP, rp_info); | |
463 | return PIM_SUCCESS; | |
464 | } | |
465 | ||
466 | /* | |
467 | * Barf if the prefix-list is already configured for an RP | |
468 | */ | |
d9c9a9ee | 469 | if (pim_rp_prefix_list_used(pim, plist)) { |
d62a17ae | 470 | XFREE(MTYPE_PIM_RP, rp_info); |
471 | return PIM_RP_PFXLIST_IN_USE; | |
472 | } | |
473 | ||
474 | /* | |
475 | * Free any existing rp_info entries for this RP | |
476 | */ | |
d9c9a9ee | 477 | for (ALL_LIST_ELEMENTS(pim->rp_list, node, nnode, |
d62a17ae | 478 | tmp_rp_info)) { |
479 | if (rp_info->rp.rpf_addr.u.prefix4.s_addr | |
480 | == tmp_rp_info->rp.rpf_addr.u.prefix4.s_addr) { | |
481 | if (tmp_rp_info->plist) | |
fec883d9 | 482 | pim_rp_del(pim, rp, NULL, |
d62a17ae | 483 | tmp_rp_info->plist); |
484 | else | |
485 | pim_rp_del( | |
fec883d9 | 486 | pim, rp, |
d62a17ae | 487 | prefix2str(&tmp_rp_info->group, |
488 | buffer, BUFSIZ), | |
489 | NULL); | |
490 | } | |
491 | } | |
492 | ||
493 | rp_info->plist = XSTRDUP(MTYPE_PIM_FILTER_NAME, plist); | |
494 | } else { | |
89b68082 | 495 | |
2e8345c1 DS |
496 | if (!str2prefix("224.0.0.0/4", &group_all)) { |
497 | XFREE(MTYPE_PIM_RP, rp_info); | |
498 | return PIM_GROUP_BAD_ADDRESS; | |
499 | } | |
d9c9a9ee | 500 | rp_all = pim_rp_find_match_group(pim, &group_all); |
d62a17ae | 501 | |
502 | /* | |
503 | * Barf if group is a non-multicast subnet | |
504 | */ | |
505 | if (!prefix_match(&rp_all->group, &rp_info->group)) { | |
506 | XFREE(MTYPE_PIM_RP, rp_info); | |
507 | return PIM_GROUP_BAD_ADDRESS; | |
508 | } | |
509 | ||
510 | /* | |
511 | * Remove any prefix-list rp_info entries for this RP | |
512 | */ | |
d9c9a9ee | 513 | for (ALL_LIST_ELEMENTS(pim->rp_list, node, nnode, |
d62a17ae | 514 | tmp_rp_info)) { |
515 | if (tmp_rp_info->plist | |
516 | && rp_info->rp.rpf_addr.u.prefix4.s_addr | |
517 | == tmp_rp_info->rp.rpf_addr.u.prefix4 | |
518 | .s_addr) { | |
fec883d9 | 519 | pim_rp_del(pim, rp, NULL, tmp_rp_info->plist); |
d62a17ae | 520 | } |
521 | } | |
522 | ||
523 | /* | |
524 | * Take over the 224.0.0.0/4 group if the rp is INADDR_NONE | |
525 | */ | |
526 | if (prefix_same(&rp_all->group, &rp_info->group) | |
527 | && pim_rpf_addr_is_inaddr_none(&rp_all->rp)) { | |
528 | rp_all->rp.rpf_addr = rp_info->rp.rpf_addr; | |
529 | XFREE(MTYPE_PIM_RP, rp_info); | |
530 | ||
531 | /* Register addr with Zebra NHT */ | |
532 | nht_p.family = AF_INET; | |
533 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
534 | nht_p.u.prefix4 = | |
535 | rp_all->rp.rpf_addr.u.prefix4; // RP address | |
3d225d48 | 536 | if (PIM_DEBUG_PIM_NHT_RP) { |
d62a17ae | 537 | char buf[PREFIX2STR_BUFFER]; |
538 | char buf1[PREFIX2STR_BUFFER]; | |
539 | prefix2str(&nht_p, buf, sizeof(buf)); | |
540 | prefix2str(&rp_all->group, buf1, sizeof(buf1)); | |
541 | zlog_debug( | |
542 | "%s: NHT Register rp_all addr %s grp %s ", | |
543 | __PRETTY_FUNCTION__, buf, buf1); | |
544 | } | |
28309df0 SP |
545 | |
546 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, | |
547 | up)) { | |
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; | |
559 | trp_info = pim_rp_find_match_group(pim, | |
560 | &grp); | |
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); | |
568 | ||
43763b11 DS |
569 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_all, |
570 | NULL); | |
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; | |
5bd51314 | 575 | |
d62a17ae | 576 | return PIM_SUCCESS; |
577 | } | |
578 | ||
579 | /* | |
580 | * Return if the group is already configured for this RP | |
581 | */ | |
d9c9a9ee | 582 | if (pim_rp_find_exact(pim, rp_info->rp.rpf_addr.u.prefix4, |
d62a17ae | 583 | &rp_info->group)) { |
584 | XFREE(MTYPE_PIM_RP, rp_info); | |
585 | return PIM_SUCCESS; | |
586 | } | |
587 | ||
588 | /* | |
589 | * Barf if this group is already covered by some other RP | |
590 | */ | |
d9c9a9ee | 591 | tmp_rp_info = pim_rp_find_match_group(pim, &rp_info->group); |
d62a17ae | 592 | |
593 | if (tmp_rp_info) { | |
594 | if (tmp_rp_info->plist) { | |
595 | XFREE(MTYPE_PIM_RP, rp_info); | |
596 | return PIM_GROUP_PFXLIST_OVERLAP; | |
597 | } else { | |
598 | /* | |
599 | * If the only RP that covers this group is an | |
600 | * RP configured for | |
601 | * 224.0.0.0/4 that is fine, ignore that one. | |
602 | * For all others | |
603 | * though we must return PIM_GROUP_OVERLAP | |
604 | */ | |
89b68082 DS |
605 | if (prefix_same(&rp_info->group, |
606 | &tmp_rp_info->group)) { | |
d62a17ae | 607 | XFREE(MTYPE_PIM_RP, rp_info); |
608 | return PIM_GROUP_OVERLAP; | |
609 | } | |
610 | } | |
611 | } | |
612 | } | |
613 | ||
d9c9a9ee | 614 | listnode_add_sort(pim->rp_list, rp_info); |
89b68082 | 615 | rn = route_node_get(pim->rp_table, &rp_info->group); |
89b68082 DS |
616 | rn->info = rp_info; |
617 | ||
618 | if (PIM_DEBUG_TRACE) { | |
619 | char buf[PREFIX_STRLEN]; | |
620 | ||
996c9314 LB |
621 | zlog_debug("Allocated: %p for rp_info: %p(%s) Lock: %d", rn, |
622 | rp_info, | |
89b68082 DS |
623 | prefix2str(&rp_info->group, buf, sizeof(buf)), |
624 | rn->lock); | |
625 | } | |
d62a17ae | 626 | |
28309df0 SP |
627 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, up)) { |
628 | if (up->sg.src.s_addr == INADDR_ANY) { | |
629 | struct prefix grp; | |
630 | struct rp_info *trp_info; | |
631 | ||
632 | grp.family = AF_INET; | |
633 | grp.prefixlen = IPV4_MAX_BITLEN; | |
634 | grp.u.prefix4 = up->sg.grp; | |
635 | trp_info = pim_rp_find_match_group(pim, &grp); | |
636 | ||
637 | if (trp_info == rp_info) | |
638 | pim_upstream_update(pim, up); | |
639 | } | |
640 | } | |
641 | ||
5bd51314 DS |
642 | pim_rp_check_interfaces(pim, rp_info); |
643 | pim_rp_refresh_group_to_rp_mapping(pim); | |
644 | ||
d62a17ae | 645 | /* Register addr with Zebra NHT */ |
646 | nht_p.family = AF_INET; | |
647 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
648 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
3d225d48 | 649 | if (PIM_DEBUG_PIM_NHT_RP) { |
d62a17ae | 650 | char buf[PREFIX2STR_BUFFER]; |
651 | char buf1[PREFIX2STR_BUFFER]; | |
652 | prefix2str(&nht_p, buf, sizeof(buf)); | |
653 | prefix2str(&rp_info->group, buf1, sizeof(buf1)); | |
654 | zlog_debug("%s: NHT Register RP addr %s grp %s with Zebra ", | |
655 | __PRETTY_FUNCTION__, buf, buf1); | |
656 | } | |
657 | ||
43763b11 DS |
658 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, NULL); |
659 | if (!pim_ecmp_nexthop_lookup(pim, &rp_info->rp.source_nexthop, &nht_p, | |
660 | &rp_info->group, 1)) | |
661 | return PIM_RP_NO_PATH; | |
d62a17ae | 662 | |
d62a17ae | 663 | return PIM_SUCCESS; |
75a26779 DS |
664 | } |
665 | ||
fec883d9 DS |
666 | int pim_rp_del(struct pim_instance *pim, const char *rp, |
667 | const char *group_range, const char *plist) | |
75a26779 | 668 | { |
d62a17ae | 669 | struct prefix group; |
670 | struct in_addr rp_addr; | |
671 | struct prefix g_all; | |
672 | struct rp_info *rp_info; | |
673 | struct rp_info *rp_all; | |
674 | int result; | |
675 | struct prefix nht_p; | |
89b68082 DS |
676 | struct route_node *rn; |
677 | bool was_plist = false; | |
8cfd7268 SP |
678 | struct rp_info *trp_info; |
679 | struct pim_upstream *up; | |
680 | struct listnode *upnode; | |
d62a17ae | 681 | |
682 | if (group_range == NULL) | |
683 | result = str2prefix("224.0.0.0/4", &group); | |
684 | else | |
685 | result = str2prefix(group_range, &group); | |
686 | ||
687 | if (!result) | |
688 | return PIM_GROUP_BAD_ADDRESS; | |
689 | ||
690 | result = inet_pton(AF_INET, rp, &rp_addr); | |
691 | if (result <= 0) | |
692 | return PIM_RP_BAD_ADDRESS; | |
693 | ||
694 | if (plist) | |
d9c9a9ee | 695 | rp_info = pim_rp_find_prefix_list(pim, rp_addr, plist); |
d62a17ae | 696 | else |
d9c9a9ee | 697 | rp_info = pim_rp_find_exact(pim, rp_addr, &group); |
d62a17ae | 698 | |
699 | if (!rp_info) | |
700 | return PIM_RP_NOT_FOUND; | |
701 | ||
702 | if (rp_info->plist) { | |
703 | XFREE(MTYPE_PIM_FILTER_NAME, rp_info->plist); | |
89b68082 | 704 | was_plist = true; |
d62a17ae | 705 | } |
706 | ||
707 | /* Deregister addr with Zebra NHT */ | |
708 | nht_p.family = AF_INET; | |
709 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
710 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
3d225d48 | 711 | if (PIM_DEBUG_PIM_NHT_RP) { |
d62a17ae | 712 | char buf[PREFIX2STR_BUFFER]; |
713 | prefix2str(&nht_p, buf, sizeof(buf)); | |
714 | zlog_debug("%s: Deregister RP addr %s with Zebra ", | |
715 | __PRETTY_FUNCTION__, buf); | |
716 | } | |
fec883d9 | 717 | pim_delete_tracked_nexthop(pim, &nht_p, NULL, rp_info); |
d62a17ae | 718 | |
e691f179 DS |
719 | if (!str2prefix("224.0.0.0/4", &g_all)) |
720 | return PIM_RP_BAD_ADDRESS; | |
721 | ||
d9c9a9ee | 722 | rp_all = pim_rp_find_match_group(pim, &g_all); |
d62a17ae | 723 | |
724 | if (rp_all == rp_info) { | |
8cfd7268 SP |
725 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, up)) { |
726 | /* Find the upstream (*, G) whose upstream address is | |
727 | * same as the deleted RP | |
728 | */ | |
729 | if ((up->upstream_addr.s_addr == rp_addr.s_addr) && | |
730 | (up->sg.src.s_addr == INADDR_ANY)) { | |
731 | struct prefix grp; | |
732 | grp.family = AF_INET; | |
733 | grp.prefixlen = IPV4_MAX_BITLEN; | |
734 | grp.u.prefix4 = up->sg.grp; | |
735 | trp_info = pim_rp_find_match_group(pim, &grp); | |
736 | if (trp_info == rp_all) { | |
737 | pim_upstream_rpf_clear(pim, up); | |
738 | up->upstream_addr.s_addr = INADDR_ANY; | |
739 | } | |
740 | } | |
741 | } | |
d62a17ae | 742 | rp_all->rp.rpf_addr.family = AF_INET; |
743 | rp_all->rp.rpf_addr.u.prefix4.s_addr = INADDR_NONE; | |
744 | rp_all->i_am_rp = 0; | |
745 | return PIM_SUCCESS; | |
746 | } | |
747 | ||
d9c9a9ee | 748 | listnode_delete(pim->rp_list, rp_info); |
89b68082 DS |
749 | |
750 | if (!was_plist) { | |
751 | rn = route_node_get(pim->rp_table, &rp_info->group); | |
752 | if (rn) { | |
753 | if (rn->info != rp_info) | |
af4c2728 | 754 | flog_err( |
450971aa | 755 | EC_LIB_DEVELOPMENT, |
3613d898 | 756 | "Expected rn->info to be equal to rp_info"); |
89b68082 DS |
757 | |
758 | if (PIM_DEBUG_TRACE) { | |
759 | char buf[PREFIX_STRLEN]; | |
760 | ||
996c9314 LB |
761 | zlog_debug( |
762 | "%s:Found for Freeing: %p for rp_info: %p(%s) Lock: %d", | |
763 | __PRETTY_FUNCTION__, rn, rp_info, | |
764 | prefix2str(&rp_info->group, buf, | |
765 | sizeof(buf)), | |
766 | rn->lock); | |
89b68082 DS |
767 | } |
768 | rn->info = NULL; | |
769 | route_unlock_node(rn); | |
770 | route_unlock_node(rn); | |
771 | } | |
772 | } | |
773 | ||
472ad383 | 774 | pim_rp_refresh_group_to_rp_mapping(pim); |
093c928f | 775 | |
8cfd7268 SP |
776 | for (ALL_LIST_ELEMENTS_RO(pim->upstream_list, upnode, up)) { |
777 | /* Find the upstream (*, G) whose upstream address is same as | |
778 | * the deleted RP | |
779 | */ | |
780 | if ((up->upstream_addr.s_addr == rp_addr.s_addr) && | |
781 | (up->sg.src.s_addr == INADDR_ANY)) { | |
782 | struct prefix grp; | |
783 | ||
784 | grp.family = AF_INET; | |
785 | grp.prefixlen = IPV4_MAX_BITLEN; | |
786 | grp.u.prefix4 = up->sg.grp; | |
787 | ||
788 | trp_info = pim_rp_find_match_group(pim, &grp); | |
789 | ||
790 | /* RP not found for the group grp */ | |
791 | if (pim_rpf_addr_is_inaddr_none(&trp_info->rp)) { | |
792 | pim_upstream_rpf_clear(pim, up); | |
793 | pim_rp_set_upstream_addr(pim, | |
794 | &up->upstream_addr, | |
795 | up->sg.src, up->sg.grp); | |
796 | } | |
797 | ||
798 | /* RP found for the group grp */ | |
799 | else | |
800 | pim_upstream_update(pim, up); | |
801 | } | |
802 | } | |
803 | ||
093c928f | 804 | XFREE(MTYPE_PIM_RP, rp_info); |
d62a17ae | 805 | return PIM_SUCCESS; |
75a26779 | 806 | } |
13afbd05 | 807 | |
fec883d9 | 808 | void pim_rp_setup(struct pim_instance *pim) |
13afbd05 | 809 | { |
d62a17ae | 810 | struct listnode *node; |
811 | struct rp_info *rp_info; | |
d62a17ae | 812 | struct prefix nht_p; |
d62a17ae | 813 | |
d9c9a9ee | 814 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 815 | if (rp_info->rp.rpf_addr.u.prefix4.s_addr == INADDR_NONE) |
816 | continue; | |
817 | ||
818 | nht_p.family = AF_INET; | |
819 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
820 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
8cfd7268 | 821 | |
43763b11 DS |
822 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, NULL); |
823 | if (!pim_ecmp_nexthop_lookup(pim, &rp_info->rp.source_nexthop, | |
824 | &nht_p, &rp_info->group, 1)) | |
825 | if (PIM_DEBUG_PIM_NHT_RP) | |
d62a17ae | 826 | zlog_debug( |
43763b11 | 827 | "Unable to lookup nexthop for rp specified"); |
d62a17ae | 828 | } |
13afbd05 DS |
829 | } |
830 | ||
54b97c74 | 831 | /* |
7176984f | 832 | * Checks to see if we should elect ourself the actual RP when new if |
833 | * addresses are added against an interface. | |
54b97c74 | 834 | */ |
d62a17ae | 835 | void pim_rp_check_on_if_add(struct pim_interface *pim_ifp) |
54b97c74 | 836 | { |
d62a17ae | 837 | struct listnode *node; |
838 | struct rp_info *rp_info; | |
839 | bool i_am_rp_changed = false; | |
d9c9a9ee | 840 | struct pim_instance *pim = pim_ifp->pim; |
d62a17ae | 841 | |
d9c9a9ee | 842 | if (pim->rp_list == NULL) |
d62a17ae | 843 | return; |
844 | ||
d9c9a9ee | 845 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 846 | if (pim_rpf_addr_is_inaddr_none(&rp_info->rp)) |
847 | continue; | |
848 | ||
849 | /* if i_am_rp is already set nothing to be done (adding new | |
850 | * addresses | |
851 | * is not going to make a difference). */ | |
852 | if (rp_info->i_am_rp) { | |
853 | continue; | |
854 | } | |
855 | ||
856 | if (pim_rp_check_interface_addrs(rp_info, pim_ifp)) { | |
857 | i_am_rp_changed = true; | |
858 | rp_info->i_am_rp = 1; | |
3d225d48 | 859 | if (PIM_DEBUG_PIM_NHT_RP) { |
d62a17ae | 860 | char rp[PREFIX_STRLEN]; |
861 | pim_addr_dump("<rp?>", &rp_info->rp.rpf_addr, | |
862 | rp, sizeof(rp)); | |
863 | zlog_debug("%s: %s: i am rp", __func__, rp); | |
864 | } | |
865 | } | |
866 | } | |
867 | ||
868 | if (i_am_rp_changed) { | |
472ad383 | 869 | pim_msdp_i_am_rp_changed(pim); |
d62a17ae | 870 | } |
7176984f | 871 | } |
36d6bd7d | 872 | |
7176984f | 873 | /* up-optimized re-evaluation of "i_am_rp". this is used when ifaddresses |
874 | * are removed. Removing numbers is an uncommon event in an active network | |
875 | * so I have made no attempt to optimize it. */ | |
fec883d9 | 876 | void pim_i_am_rp_re_evaluate(struct pim_instance *pim) |
7176984f | 877 | { |
d62a17ae | 878 | struct listnode *node; |
879 | struct rp_info *rp_info; | |
880 | bool i_am_rp_changed = false; | |
881 | int old_i_am_rp; | |
882 | ||
d9c9a9ee | 883 | if (pim->rp_list == NULL) |
d62a17ae | 884 | return; |
885 | ||
d9c9a9ee | 886 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 887 | if (pim_rpf_addr_is_inaddr_none(&rp_info->rp)) |
888 | continue; | |
889 | ||
890 | old_i_am_rp = rp_info->i_am_rp; | |
fec883d9 | 891 | pim_rp_check_interfaces(pim, rp_info); |
d62a17ae | 892 | |
893 | if (old_i_am_rp != rp_info->i_am_rp) { | |
894 | i_am_rp_changed = true; | |
3d225d48 | 895 | if (PIM_DEBUG_PIM_NHT_RP) { |
d62a17ae | 896 | char rp[PREFIX_STRLEN]; |
897 | pim_addr_dump("<rp?>", &rp_info->rp.rpf_addr, | |
898 | rp, sizeof(rp)); | |
899 | if (rp_info->i_am_rp) { | |
900 | zlog_debug("%s: %s: i am rp", __func__, | |
901 | rp); | |
902 | } else { | |
903 | zlog_debug("%s: %s: i am no longer rp", | |
904 | __func__, rp); | |
905 | } | |
906 | } | |
907 | } | |
908 | } | |
909 | ||
910 | if (i_am_rp_changed) { | |
472ad383 | 911 | pim_msdp_i_am_rp_changed(pim); |
d62a17ae | 912 | } |
54b97c74 DS |
913 | } |
914 | ||
915 | /* | |
916 | * I_am_RP(G) is true if the group-to-RP mapping indicates that | |
917 | * this router is the RP for the group. | |
918 | * | |
919 | * Since we only have static RP, all groups are part of this RP | |
920 | */ | |
d9c9a9ee | 921 | int pim_rp_i_am_rp(struct pim_instance *pim, struct in_addr group) |
54b97c74 | 922 | { |
d62a17ae | 923 | struct prefix g; |
924 | struct rp_info *rp_info; | |
36d6bd7d | 925 | |
d62a17ae | 926 | memset(&g, 0, sizeof(g)); |
927 | g.family = AF_INET; | |
928 | g.prefixlen = 32; | |
929 | g.u.prefix4 = group; | |
36d6bd7d | 930 | |
d9c9a9ee | 931 | rp_info = pim_rp_find_match_group(pim, &g); |
36d6bd7d | 932 | |
d62a17ae | 933 | if (rp_info) |
934 | return rp_info->i_am_rp; | |
36d6bd7d | 935 | |
d62a17ae | 936 | return 0; |
54b97c74 DS |
937 | } |
938 | ||
71694057 DS |
939 | /* |
940 | * RP(G) | |
941 | * | |
942 | * Return the RP that the Group belongs too. | |
943 | */ | |
fec883d9 | 944 | struct pim_rpf *pim_rp_g(struct pim_instance *pim, struct in_addr group) |
71694057 | 945 | { |
d62a17ae | 946 | struct prefix g; |
947 | struct rp_info *rp_info; | |
948 | ||
949 | memset(&g, 0, sizeof(g)); | |
950 | g.family = AF_INET; | |
951 | g.prefixlen = 32; | |
952 | g.u.prefix4 = group; | |
953 | ||
d9c9a9ee | 954 | rp_info = pim_rp_find_match_group(pim, &g); |
d62a17ae | 955 | |
956 | if (rp_info) { | |
957 | struct prefix nht_p; | |
43763b11 | 958 | |
d62a17ae | 959 | /* Register addr with Zebra NHT */ |
960 | nht_p.family = AF_INET; | |
961 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
962 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
3d225d48 | 963 | if (PIM_DEBUG_PIM_NHT_RP) { |
d62a17ae | 964 | char buf[PREFIX2STR_BUFFER]; |
965 | char buf1[PREFIX2STR_BUFFER]; | |
966 | prefix2str(&nht_p, buf, sizeof(buf)); | |
967 | prefix2str(&rp_info->group, buf1, sizeof(buf1)); | |
968 | zlog_debug( | |
969 | "%s: NHT Register RP addr %s grp %s with Zebra", | |
970 | __PRETTY_FUNCTION__, buf, buf1); | |
971 | } | |
43763b11 DS |
972 | |
973 | pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, NULL); | |
974 | pim_rpf_set_refresh_time(pim); | |
975 | (void)pim_ecmp_nexthop_lookup(pim, &rp_info->rp.source_nexthop, | |
976 | &nht_p, &rp_info->group, 1); | |
d62a17ae | 977 | return (&rp_info->rp); |
978 | } | |
979 | ||
980 | // About to Go Down | |
981 | return NULL; | |
71694057 DS |
982 | } |
983 | ||
8f5f5e91 DS |
984 | /* |
985 | * Set the upstream IP address we want to talk to based upon | |
986 | * the rp configured and the source address | |
987 | * | |
988 | * If we have don't have a RP configured and the source address is * | |
732c209c | 989 | * then set the upstream addr as INADDR_ANY and return failure. |
8f5f5e91 DS |
990 | * |
991 | */ | |
d9c9a9ee DS |
992 | int pim_rp_set_upstream_addr(struct pim_instance *pim, struct in_addr *up, |
993 | struct in_addr source, struct in_addr group) | |
8f5f5e91 | 994 | { |
d62a17ae | 995 | struct rp_info *rp_info; |
996 | struct prefix g; | |
36d6bd7d | 997 | |
d62a17ae | 998 | memset(&g, 0, sizeof(g)); |
999 | g.family = AF_INET; | |
1000 | g.prefixlen = 32; | |
1001 | g.u.prefix4 = group; | |
36d6bd7d | 1002 | |
d9c9a9ee | 1003 | rp_info = pim_rp_find_match_group(pim, &g); |
36d6bd7d | 1004 | |
ca491f0e DS |
1005 | if (!rp_info || ((pim_rpf_addr_is_inaddr_none(&rp_info->rp)) |
1006 | && (source.s_addr == INADDR_ANY))) { | |
3d225d48 | 1007 | if (PIM_DEBUG_PIM_NHT_RP) |
d62a17ae | 1008 | zlog_debug("%s: Received a (*,G) with no RP configured", |
1009 | __PRETTY_FUNCTION__); | |
732c209c | 1010 | up->s_addr = INADDR_ANY; |
d62a17ae | 1011 | return 0; |
1012 | } | |
8f5f5e91 | 1013 | |
d62a17ae | 1014 | *up = (source.s_addr == INADDR_ANY) ? rp_info->rp.rpf_addr.u.prefix4 |
1015 | : source; | |
8f5f5e91 | 1016 | |
d62a17ae | 1017 | return 1; |
8f5f5e91 | 1018 | } |
75a26779 | 1019 | |
0c8b717e DS |
1020 | int pim_rp_config_write(struct pim_instance *pim, struct vty *vty, |
1021 | const char *spaces) | |
75a26779 | 1022 | { |
d62a17ae | 1023 | struct listnode *node; |
1024 | struct rp_info *rp_info; | |
1025 | char rp_buffer[32]; | |
1026 | char group_buffer[32]; | |
1027 | int count = 0; | |
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 | if (rp_info->plist) | |
0c8b717e | 1034 | vty_out(vty, "%sip pim rp %s prefix-list %s\n", spaces, |
d62a17ae | 1035 | inet_ntop(AF_INET, |
1036 | &rp_info->rp.rpf_addr.u.prefix4, | |
1037 | rp_buffer, 32), | |
1038 | rp_info->plist); | |
1039 | else | |
0c8b717e | 1040 | vty_out(vty, "%sip pim rp %s %s\n", spaces, |
d62a17ae | 1041 | inet_ntop(AF_INET, |
1042 | &rp_info->rp.rpf_addr.u.prefix4, | |
1043 | rp_buffer, 32), | |
1044 | prefix2str(&rp_info->group, group_buffer, 32)); | |
1045 | count++; | |
1046 | } | |
1047 | ||
1048 | return count; | |
75a26779 DS |
1049 | } |
1050 | ||
f43593d9 DS |
1051 | bool pim_rp_check_is_my_ip_address(struct pim_instance *pim, |
1052 | struct in_addr dest_addr) | |
75a26779 | 1053 | { |
fec883d9 | 1054 | if (if_lookup_exact_address(&dest_addr, AF_INET, pim->vrf_id)) |
f43593d9 | 1055 | return true; |
d62a17ae | 1056 | |
f43593d9 | 1057 | return false; |
75a26779 | 1058 | } |
00d07c6f | 1059 | |
088f1098 | 1060 | void pim_rp_show_information(struct pim_instance *pim, struct vty *vty, bool uj) |
00d07c6f | 1061 | { |
d62a17ae | 1062 | struct rp_info *rp_info; |
1063 | struct rp_info *prev_rp_info = NULL; | |
1064 | struct listnode *node; | |
1065 | ||
1066 | json_object *json = NULL; | |
1067 | json_object *json_rp_rows = NULL; | |
1068 | json_object *json_row = NULL; | |
1069 | ||
1070 | if (uj) | |
1071 | json = json_object_new_object(); | |
1072 | else | |
1073 | vty_out(vty, | |
ff415346 | 1074 | "RP address group/prefix-list OIF I am RP\n"); |
d62a17ae | 1075 | |
d9c9a9ee | 1076 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 1077 | if (!pim_rpf_addr_is_inaddr_none(&rp_info->rp)) { |
1078 | char buf[48]; | |
1079 | ||
1080 | if (uj) { | |
1081 | /* | |
1082 | * If we have moved on to a new RP then add the | |
1083 | * entry for the previous RP | |
1084 | */ | |
1085 | if (prev_rp_info | |
1086 | && prev_rp_info->rp.rpf_addr.u.prefix4 | |
1087 | .s_addr | |
1088 | != rp_info->rp.rpf_addr.u.prefix4 | |
1089 | .s_addr) { | |
1090 | json_object_object_add( | |
1091 | json, | |
1092 | inet_ntoa(prev_rp_info->rp | |
1093 | .rpf_addr.u | |
1094 | .prefix4), | |
1095 | json_rp_rows); | |
1096 | json_rp_rows = NULL; | |
1097 | } | |
1098 | ||
1099 | if (!json_rp_rows) | |
1100 | json_rp_rows = json_object_new_array(); | |
1101 | ||
1102 | json_row = json_object_new_object(); | |
1103 | if (rp_info->rp.source_nexthop.interface) | |
1104 | json_object_string_add( | |
1105 | json_row, "outboundInterface", | |
1106 | rp_info->rp.source_nexthop | |
1107 | .interface->name); | |
1108 | ||
1109 | if (rp_info->i_am_rp) | |
1110 | json_object_boolean_true_add(json_row, | |
1111 | "iAmRP"); | |
1112 | ||
1113 | if (rp_info->plist) | |
1114 | json_object_string_add(json_row, | |
1115 | "prefixList", | |
1116 | rp_info->plist); | |
1117 | else | |
1118 | json_object_string_add( | |
1119 | json_row, "group", | |
1120 | prefix2str(&rp_info->group, buf, | |
1121 | 48)); | |
1122 | ||
1123 | json_object_array_add(json_rp_rows, json_row); | |
1124 | } else { | |
1125 | vty_out(vty, "%-15s ", | |
1126 | inet_ntoa(rp_info->rp.rpf_addr.u | |
1127 | .prefix4)); | |
1128 | ||
1129 | if (rp_info->plist) | |
1130 | vty_out(vty, "%-18s ", rp_info->plist); | |
1131 | else | |
1132 | vty_out(vty, "%-18s ", | |
1133 | prefix2str(&rp_info->group, buf, | |
1134 | 48)); | |
1135 | ||
1136 | if (rp_info->rp.source_nexthop.interface) | |
ff415346 | 1137 | vty_out(vty, "%-16s ", |
d62a17ae | 1138 | rp_info->rp.source_nexthop |
1139 | .interface->name); | |
1140 | else | |
ff415346 | 1141 | vty_out(vty, "%-16s ", "(Unknown)"); |
d62a17ae | 1142 | |
1143 | if (rp_info->i_am_rp) | |
1144 | vty_out(vty, "yes\n"); | |
1145 | else | |
1146 | vty_out(vty, "no\n"); | |
1147 | } | |
1148 | ||
1149 | prev_rp_info = rp_info; | |
1150 | } | |
1151 | } | |
1152 | ||
1153 | if (uj) { | |
1154 | if (prev_rp_info && json_rp_rows) | |
1155 | json_object_object_add( | |
1156 | json, | |
1157 | inet_ntoa(prev_rp_info->rp.rpf_addr.u.prefix4), | |
1158 | json_rp_rows); | |
1159 | ||
9d303b37 DL |
1160 | vty_out(vty, "%s\n", json_object_to_json_string_ext( |
1161 | json, JSON_C_TO_STRING_PRETTY)); | |
d62a17ae | 1162 | json_object_free(json); |
1163 | } | |
00d07c6f | 1164 | } |
cba44481 | 1165 | |
c9cd7fbc | 1166 | void pim_resolve_rp_nh(struct pim_instance *pim, struct pim_neighbor *nbr) |
cba44481 | 1167 | { |
d62a17ae | 1168 | struct listnode *node = NULL; |
1169 | struct rp_info *rp_info = NULL; | |
1170 | struct nexthop *nh_node = NULL; | |
1171 | struct prefix nht_p; | |
1172 | struct pim_nexthop_cache pnc; | |
d62a17ae | 1173 | |
d9c9a9ee | 1174 | for (ALL_LIST_ELEMENTS_RO(pim->rp_list, node, rp_info)) { |
d62a17ae | 1175 | if (rp_info->rp.rpf_addr.u.prefix4.s_addr == INADDR_NONE) |
1176 | continue; | |
1177 | ||
1178 | nht_p.family = AF_INET; | |
1179 | nht_p.prefixlen = IPV4_MAX_BITLEN; | |
1180 | nht_p.u.prefix4 = rp_info->rp.rpf_addr.u.prefix4; | |
1181 | memset(&pnc, 0, sizeof(struct pim_nexthop_cache)); | |
fec883d9 | 1182 | if (!pim_find_or_track_nexthop(pim, &nht_p, NULL, rp_info, |
25bdac42 | 1183 | &pnc)) |
cb9c7c50 DS |
1184 | continue; |
1185 | ||
1186 | for (nh_node = pnc.nexthop; nh_node; nh_node = nh_node->next) { | |
1187 | if (nh_node->gate.ipv4.s_addr != 0) | |
1188 | continue; | |
1189 | ||
1190 | struct interface *ifp1 = if_lookup_by_index( | |
fec883d9 | 1191 | nh_node->ifindex, pim->vrf_id); |
c9cd7fbc DS |
1192 | |
1193 | if (nbr->interface != ifp1) | |
cb9c7c50 DS |
1194 | continue; |
1195 | ||
1196 | nh_node->gate.ipv4 = nbr->source_addr; | |
3d225d48 | 1197 | if (PIM_DEBUG_PIM_NHT_RP) { |
cb9c7c50 DS |
1198 | char str[PREFIX_STRLEN]; |
1199 | char str1[INET_ADDRSTRLEN]; | |
1200 | pim_inet4_dump("<nht_nbr?>", nbr->source_addr, | |
1201 | str1, sizeof(str1)); | |
1202 | pim_addr_dump("<nht_addr?>", &nht_p, str, | |
1203 | sizeof(str)); | |
1204 | zlog_debug( | |
1205 | "%s: addr %s new nexthop addr %s interface %s", | |
1206 | __PRETTY_FUNCTION__, str, str1, | |
1207 | ifp1->name); | |
d62a17ae | 1208 | } |
1209 | } | |
1210 | } | |
cba44481 | 1211 | } |