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1bc98276 CS |
1 | /* |
2 | * PIM for Quagga | |
3 | * Copyright (C) 2017 Cumulus Networks, Inc. | |
4 | * Chirag Shah | |
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. | |
15 | * | |
896014f4 DL |
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 | |
1bc98276 CS |
19 | */ |
20 | #include <zebra.h> | |
21 | #include "network.h" | |
22 | #include "zclient.h" | |
23 | #include "stream.h" | |
24 | #include "nexthop.h" | |
25 | #include "if.h" | |
26 | #include "hash.h" | |
27 | #include "jhash.h" | |
28 | ||
29 | #include "pimd.h" | |
30 | #include "pimd/pim_nht.h" | |
31 | #include "log.h" | |
32 | #include "pim_time.h" | |
33 | #include "pim_oil.h" | |
34 | #include "pim_ifchannel.h" | |
35 | #include "pim_mroute.h" | |
36 | #include "pim_zebra.h" | |
37 | #include "pim_upstream.h" | |
38 | #include "pim_join.h" | |
39 | #include "pim_jp_agg.h" | |
40 | #include "pim_zebra.h" | |
633988a7 | 41 | #include "pim_zlookup.h" |
1bc98276 CS |
42 | |
43 | /** | |
44 | * pim_sendmsg_zebra_rnh -- Format and send a nexthop register/Unregister | |
45 | * command to Zebra. | |
46 | */ | |
64c86530 | 47 | void pim_sendmsg_zebra_rnh(struct pim_instance *pim, struct zclient *zclient, |
d62a17ae | 48 | struct pim_nexthop_cache *pnc, int command) |
1bc98276 | 49 | { |
d62a17ae | 50 | struct prefix *p; |
51 | int ret; | |
52 | ||
d62a17ae | 53 | p = &(pnc->rpf.rpf_addr); |
3c192540 | 54 | ret = zclient_send_rnh(zclient, command, p, false, pim->vrf_id); |
d62a17ae | 55 | if (ret < 0) |
56 | zlog_warn("sendmsg_nexthop: zclient_send_message() failed"); | |
57 | ||
5cef40fc | 58 | if (PIM_DEBUG_PIM_NHT) { |
d62a17ae | 59 | char buf[PREFIX2STR_BUFFER]; |
60 | prefix2str(p, buf, sizeof(buf)); | |
5cef40fc DS |
61 | zlog_debug( |
62 | "%s: NHT %sregistered addr %s(%s) with Zebra ret:%d ", | |
63 | __PRETTY_FUNCTION__, | |
64 | (command == ZEBRA_NEXTHOP_REGISTER) ? " " : "de", buf, | |
65 | pim->vrf->name, ret); | |
d62a17ae | 66 | } |
67 | ||
68 | return; | |
1bc98276 CS |
69 | } |
70 | ||
d0a4f55d DS |
71 | struct pim_nexthop_cache *pim_nexthop_cache_find(struct pim_instance *pim, |
72 | struct pim_rpf *rpf) | |
1bc98276 | 73 | { |
d62a17ae | 74 | struct pim_nexthop_cache *pnc = NULL; |
75 | struct pim_nexthop_cache lookup; | |
1bc98276 | 76 | |
d62a17ae | 77 | lookup.rpf.rpf_addr.family = rpf->rpf_addr.family; |
78 | lookup.rpf.rpf_addr.prefixlen = rpf->rpf_addr.prefixlen; | |
79 | lookup.rpf.rpf_addr.u.prefix4.s_addr = rpf->rpf_addr.u.prefix4.s_addr; | |
1bc98276 | 80 | |
d0a4f55d | 81 | pnc = hash_lookup(pim->rpf_hash, &lookup); |
1bc98276 | 82 | |
d62a17ae | 83 | return pnc; |
1bc98276 CS |
84 | } |
85 | ||
5cef40fc DS |
86 | static struct pim_nexthop_cache *pim_nexthop_cache_add(struct pim_instance *pim, |
87 | struct pim_rpf *rpf_addr) | |
1bc98276 | 88 | { |
d62a17ae | 89 | struct pim_nexthop_cache *pnc; |
9fb302f4 DS |
90 | char hash_name[64]; |
91 | char buf1[64]; | |
d62a17ae | 92 | |
93 | pnc = XCALLOC(MTYPE_PIM_NEXTHOP_CACHE, | |
94 | sizeof(struct pim_nexthop_cache)); | |
95 | if (!pnc) { | |
96 | zlog_err("%s: NHT PIM XCALLOC failure ", __PRETTY_FUNCTION__); | |
97 | return NULL; | |
98 | } | |
99 | pnc->rpf.rpf_addr.family = rpf_addr->rpf_addr.family; | |
100 | pnc->rpf.rpf_addr.prefixlen = rpf_addr->rpf_addr.prefixlen; | |
101 | pnc->rpf.rpf_addr.u.prefix4.s_addr = | |
102 | rpf_addr->rpf_addr.u.prefix4.s_addr; | |
103 | ||
d0a4f55d | 104 | pnc = hash_get(pim->rpf_hash, pnc, hash_alloc_intern); |
d62a17ae | 105 | |
106 | pnc->rp_list = list_new(); | |
107 | pnc->rp_list->cmp = pim_rp_list_cmp; | |
108 | ||
9fb302f4 | 109 | snprintf(hash_name, 64, "PNC %s(%s) Upstream Hash", |
996c9314 | 110 | prefix2str(&pnc->rpf.rpf_addr, buf1, 64), pim->vrf->name); |
7c591950 | 111 | pnc->upstream_hash = hash_create_size(8192, pim_upstream_hash_key, |
996c9314 | 112 | pim_upstream_equal, hash_name); |
d62a17ae | 113 | |
d62a17ae | 114 | return pnc; |
1bc98276 CS |
115 | } |
116 | ||
cb9c7c50 DS |
117 | /* |
118 | * pim_find_or_track_nexthop | |
119 | * | |
120 | * This API is used to Register an address with Zebra | |
121 | * | |
122 | * 1 -> Success | |
123 | * 0 -> Failure | |
124 | */ | |
25bdac42 DS |
125 | int pim_find_or_track_nexthop(struct pim_instance *pim, struct prefix *addr, |
126 | struct pim_upstream *up, struct rp_info *rp, | |
d62a17ae | 127 | struct pim_nexthop_cache *out_pnc) |
1bc98276 | 128 | { |
d62a17ae | 129 | struct pim_nexthop_cache *pnc = NULL; |
130 | struct pim_rpf rpf; | |
131 | struct listnode *ch_node = NULL; | |
132 | struct zclient *zclient = NULL; | |
133 | ||
134 | zclient = pim_zebra_zclient_get(); | |
135 | memset(&rpf, 0, sizeof(struct pim_rpf)); | |
136 | rpf.rpf_addr.family = addr->family; | |
137 | rpf.rpf_addr.prefixlen = addr->prefixlen; | |
138 | rpf.rpf_addr.u.prefix4 = addr->u.prefix4; | |
139 | ||
25bdac42 | 140 | pnc = pim_nexthop_cache_find(pim, &rpf); |
d62a17ae | 141 | if (!pnc) { |
25bdac42 | 142 | pnc = pim_nexthop_cache_add(pim, &rpf); |
5cef40fc | 143 | if (!pnc) { |
d62a17ae | 144 | char rpf_str[PREFIX_STRLEN]; |
145 | pim_addr_dump("<nht-pnc?>", addr, rpf_str, | |
146 | sizeof(rpf_str)); | |
147 | zlog_warn("%s: pnc node allocation failed. addr %s ", | |
148 | __PRETTY_FUNCTION__, rpf_str); | |
cb9c7c50 | 149 | return 0; |
d62a17ae | 150 | } |
5cef40fc DS |
151 | pim_sendmsg_zebra_rnh(pim, zclient, pnc, |
152 | ZEBRA_NEXTHOP_REGISTER); | |
153 | if (PIM_DEBUG_PIM_NHT) { | |
154 | char buf[PREFIX2STR_BUFFER]; | |
155 | prefix2str(addr, buf, sizeof(buf)); | |
156 | zlog_debug( | |
157 | "%s: NHT cache and zebra notification added for %s(%s)", | |
158 | __PRETTY_FUNCTION__, buf, pim->vrf->name); | |
159 | } | |
d62a17ae | 160 | } |
161 | ||
162 | if (rp != NULL) { | |
163 | ch_node = listnode_lookup(pnc->rp_list, rp); | |
5cef40fc | 164 | if (ch_node == NULL) |
d62a17ae | 165 | listnode_add_sort(pnc->rp_list, rp); |
d62a17ae | 166 | } |
167 | ||
7c591950 | 168 | if (up != NULL) |
c31a793b | 169 | hash_get(pnc->upstream_hash, up, hash_alloc_intern); |
d62a17ae | 170 | |
171 | if (pnc && CHECK_FLAG(pnc->flags, PIM_NEXTHOP_VALID)) { | |
172 | memcpy(out_pnc, pnc, sizeof(struct pim_nexthop_cache)); | |
173 | return 1; | |
174 | } | |
175 | ||
176 | return 0; | |
1bc98276 CS |
177 | } |
178 | ||
d0a4f55d DS |
179 | void pim_delete_tracked_nexthop(struct pim_instance *pim, struct prefix *addr, |
180 | struct pim_upstream *up, struct rp_info *rp) | |
1bc98276 | 181 | { |
d62a17ae | 182 | struct pim_nexthop_cache *pnc = NULL; |
183 | struct pim_nexthop_cache lookup; | |
184 | struct zclient *zclient = NULL; | |
185 | ||
186 | zclient = pim_zebra_zclient_get(); | |
187 | ||
188 | /* Remove from RPF hash if it is the last entry */ | |
189 | lookup.rpf.rpf_addr = *addr; | |
d0a4f55d | 190 | pnc = hash_lookup(pim->rpf_hash, &lookup); |
d62a17ae | 191 | if (pnc) { |
192 | if (rp) | |
193 | listnode_delete(pnc->rp_list, rp); | |
194 | if (up) | |
7c591950 | 195 | hash_release(pnc->upstream_hash, up); |
d62a17ae | 196 | |
5cef40fc DS |
197 | if (PIM_DEBUG_PIM_NHT) { |
198 | char buf[PREFIX_STRLEN]; | |
199 | prefix2str(addr, buf, sizeof buf); | |
d62a17ae | 200 | zlog_debug( |
7c591950 | 201 | "%s: NHT %s(%s) rp_list count:%d upstream count:%ld", |
5cef40fc | 202 | __PRETTY_FUNCTION__, buf, pim->vrf->name, |
7c591950 | 203 | pnc->rp_list->count, pnc->upstream_hash->count); |
5cef40fc | 204 | } |
d62a17ae | 205 | |
206 | if (pnc->rp_list->count == 0 | |
7c591950 | 207 | && pnc->upstream_hash->count == 0) { |
64c86530 | 208 | pim_sendmsg_zebra_rnh(pim, zclient, pnc, |
d62a17ae | 209 | ZEBRA_NEXTHOP_UNREGISTER); |
210 | ||
affe9e99 | 211 | list_delete_and_null(&pnc->rp_list); |
7c591950 | 212 | hash_free(pnc->upstream_hash); |
d62a17ae | 213 | |
d0a4f55d | 214 | hash_release(pim->rpf_hash, pnc); |
d62a17ae | 215 | if (pnc->nexthop) |
216 | nexthops_free(pnc->nexthop); | |
217 | XFREE(MTYPE_PIM_NEXTHOP_CACHE, pnc); | |
218 | } | |
219 | } | |
1bc98276 CS |
220 | } |
221 | ||
222 | /* Update RP nexthop info based on Nexthop update received from Zebra.*/ | |
a7f95c76 DS |
223 | static void pim_update_rp_nh(struct pim_instance *pim, |
224 | struct pim_nexthop_cache *pnc) | |
1bc98276 | 225 | { |
d62a17ae | 226 | struct listnode *node = NULL; |
227 | struct rp_info *rp_info = NULL; | |
d62a17ae | 228 | |
229 | /*Traverse RP list and update each RP Nexthop info */ | |
230 | for (ALL_LIST_ELEMENTS_RO(pnc->rp_list, node, rp_info)) { | |
231 | if (rp_info->rp.rpf_addr.u.prefix4.s_addr == INADDR_NONE) | |
232 | continue; | |
233 | ||
234 | // Compute PIM RPF using cached nexthop | |
996c9314 LB |
235 | pim_ecmp_nexthop_search(pim, pnc, &rp_info->rp.source_nexthop, |
236 | &rp_info->rp.rpf_addr, &rp_info->group, | |
237 | 1); | |
d62a17ae | 238 | } |
1bc98276 CS |
239 | } |
240 | ||
633988a7 CS |
241 | /* This API is used to traverse nexthop cache of RPF addr |
242 | of upstream entry whose IPv4 nexthop address is in | |
243 | unresolved state and due to event like pim neighbor | |
244 | UP event if it can be resolved. | |
245 | */ | |
25b787a2 | 246 | void pim_resolve_upstream_nh(struct pim_instance *pim, struct prefix *nht_p) |
633988a7 | 247 | { |
d62a17ae | 248 | struct nexthop *nh_node = NULL; |
249 | struct pim_nexthop_cache pnc; | |
250 | struct pim_neighbor *nbr = NULL; | |
251 | ||
252 | memset(&pnc, 0, sizeof(struct pim_nexthop_cache)); | |
25b787a2 | 253 | if (!pim_find_or_track_nexthop(pim, nht_p, NULL, NULL, &pnc)) |
cb9c7c50 DS |
254 | return; |
255 | ||
256 | for (nh_node = pnc.nexthop; nh_node; nh_node = nh_node->next) { | |
257 | if (nh_node->gate.ipv4.s_addr != 0) | |
258 | continue; | |
259 | ||
260 | struct interface *ifp1 = | |
25b787a2 | 261 | if_lookup_by_index(nh_node->ifindex, pim->vrf_id); |
cb9c7c50 DS |
262 | nbr = pim_neighbor_find_if(ifp1); |
263 | if (!nbr) | |
264 | continue; | |
265 | ||
266 | nh_node->gate.ipv4 = nbr->source_addr; | |
5cef40fc | 267 | if (PIM_DEBUG_PIM_NHT) { |
cb9c7c50 DS |
268 | char str[PREFIX_STRLEN]; |
269 | char str1[INET_ADDRSTRLEN]; | |
270 | pim_inet4_dump("<nht_nbr?>", nbr->source_addr, str1, | |
271 | sizeof(str1)); | |
272 | pim_addr_dump("<nht_addr?>", nht_p, str, sizeof(str)); | |
273 | zlog_debug( | |
274 | "%s: addr %s new nexthop addr %s interface %s", | |
275 | __PRETTY_FUNCTION__, str, str1, ifp1->name); | |
d62a17ae | 276 | } |
277 | } | |
633988a7 CS |
278 | } |
279 | ||
1bc98276 | 280 | /* Update Upstream nexthop info based on Nexthop update received from Zebra.*/ |
7c591950 | 281 | static int pim_update_upstream_nh_helper(struct hash_backet *backet, void *arg) |
1bc98276 | 282 | { |
7c591950 DS |
283 | struct pim_instance *pim = (struct pim_instance *)arg; |
284 | struct pim_upstream *up = (struct pim_upstream *)backet->data; | |
d62a17ae | 285 | int vif_index = 0; |
286 | ||
7c591950 DS |
287 | enum pim_rpf_result rpf_result; |
288 | struct pim_rpf old; | |
d62a17ae | 289 | |
7c591950 DS |
290 | old.source_nexthop.interface = up->rpf.source_nexthop.interface; |
291 | rpf_result = pim_rpf_update(pim, up, &old, 0); | |
a7f95c76 DS |
292 | if (rpf_result == PIM_RPF_FAILURE) { |
293 | pim_mroute_del(up->channel_oil, __PRETTY_FUNCTION__); | |
7c591950 | 294 | return HASHWALK_CONTINUE; |
a7f95c76 | 295 | } |
d62a17ae | 296 | |
7c591950 DS |
297 | /* update kernel multicast forwarding cache (MFC) */ |
298 | if (up->channel_oil) { | |
299 | ifindex_t ifindex = up->rpf.source_nexthop.interface->ifindex; | |
300 | ||
301 | vif_index = pim_if_find_vifindex_by_ifindex(pim, ifindex); | |
302 | /* Pass Current selected NH vif index to mroute download | |
303 | */ | |
304 | if (vif_index) | |
305 | pim_scan_individual_oil(up->channel_oil, vif_index); | |
306 | else { | |
307 | if (PIM_DEBUG_PIM_NHT) | |
308 | zlog_debug( | |
309 | "%s: NHT upstream %s channel_oil IIF %s vif_index is not valid", | |
310 | __PRETTY_FUNCTION__, up->sg_str, | |
311 | up->rpf.source_nexthop.interface->name); | |
d62a17ae | 312 | } |
7c591950 DS |
313 | } |
314 | ||
315 | if (rpf_result == PIM_RPF_CHANGED) { | |
316 | struct pim_neighbor *nbr; | |
d62a17ae | 317 | |
7c591950 DS |
318 | nbr = pim_neighbor_find(old.source_nexthop.interface, |
319 | old.rpf_addr.u.prefix4); | |
320 | if (nbr) | |
321 | pim_jp_agg_remove_group(nbr->upstream_jp_agg, up); | |
d62a17ae | 322 | |
7c591950 DS |
323 | /* |
324 | * We have detected a case where we might need to rescan | |
325 | * the inherited o_list so do it. | |
326 | */ | |
996c9314 | 327 | if (up->channel_oil && up->channel_oil->oil_inherited_rescan) { |
7c591950 DS |
328 | pim_upstream_inherited_olist_decide(pim, up); |
329 | up->channel_oil->oil_inherited_rescan = 0; | |
330 | } | |
d62a17ae | 331 | |
7c591950 | 332 | if (up->join_state == PIM_UPSTREAM_JOINED) { |
d62a17ae | 333 | /* |
7c591950 DS |
334 | * If we come up real fast we can be here |
335 | * where the mroute has not been installed | |
336 | * so install it. | |
d62a17ae | 337 | */ |
996c9314 | 338 | if (up->channel_oil && !up->channel_oil->installed) |
7c591950 DS |
339 | pim_mroute_add(up->channel_oil, |
340 | __PRETTY_FUNCTION__); | |
d62a17ae | 341 | |
7c591950 DS |
342 | /* |
343 | * RFC 4601: 4.5.7. Sending (S,G) Join/Prune Messages | |
344 | * | |
345 | * Transitions from Joined State | |
346 | * | |
347 | * RPF'(S,G) changes not due to an Assert | |
348 | * | |
349 | * The upstream (S,G) state machine remains in Joined | |
350 | * state. Send Join(S,G) to the new upstream | |
351 | * neighbor, which is the new value of RPF'(S,G). | |
352 | * Send Prune(S,G) to the old upstream neighbor, which | |
353 | * is the old value of RPF'(S,G). Set the Join | |
354 | * Timer (JT) to expire after t_periodic seconds. | |
355 | */ | |
356 | pim_jp_agg_switch_interface(&old, &up->rpf, up); | |
d62a17ae | 357 | |
7c591950 DS |
358 | pim_upstream_join_timer_restart(up, &old); |
359 | } /* up->join_state == PIM_UPSTREAM_JOINED */ | |
360 | ||
361 | /* | |
362 | * FIXME can join_desired actually be changed by | |
363 | * pim_rpf_update() returning PIM_RPF_CHANGED ? | |
364 | */ | |
365 | pim_upstream_update_join_desired(pim, up); | |
366 | ||
367 | } /* PIM_RPF_CHANGED */ | |
368 | ||
369 | if (PIM_DEBUG_PIM_NHT) { | |
370 | zlog_debug("%s: NHT upstream %s(%s) old ifp %s new ifp %s", | |
371 | __PRETTY_FUNCTION__, up->sg_str, pim->vrf->name, | |
372 | old.source_nexthop.interface->name, | |
373 | up->rpf.source_nexthop.interface->name); | |
374 | } | |
375 | ||
376 | return HASHWALK_CONTINUE; | |
377 | } | |
378 | ||
379 | static int pim_update_upstream_nh(struct pim_instance *pim, | |
380 | struct pim_nexthop_cache *pnc) | |
381 | { | |
f4e14fdb | 382 | struct listnode *node; |
7c591950 DS |
383 | struct interface *ifp; |
384 | ||
385 | hash_walk(pnc->upstream_hash, pim_update_upstream_nh_helper, pim); | |
d62a17ae | 386 | |
451fda4f | 387 | FOR_ALL_INTERFACES (pim->vrf, ifp) |
d62a17ae | 388 | if (ifp->info) { |
389 | struct pim_interface *pim_ifp = ifp->info; | |
390 | struct pim_iface_upstream_switch *us; | |
391 | ||
392 | for (ALL_LIST_ELEMENTS_RO(pim_ifp->upstream_switch_list, | |
393 | node, us)) { | |
394 | struct pim_rpf rpf; | |
395 | rpf.source_nexthop.interface = ifp; | |
396 | rpf.rpf_addr.u.prefix4 = us->address; | |
397 | pim_joinprune_send(&rpf, us->us); | |
398 | pim_jp_agg_clear_group(us->us); | |
399 | } | |
400 | } | |
401 | ||
402 | return 0; | |
1bc98276 CS |
403 | } |
404 | ||
d62a17ae | 405 | uint32_t pim_compute_ecmp_hash(struct prefix *src, struct prefix *grp) |
633988a7 | 406 | { |
d62a17ae | 407 | uint32_t hash_val; |
408 | uint32_t s = 0, g = 0; | |
409 | ||
410 | if ((!src)) | |
411 | return 0; | |
412 | ||
413 | switch (src->family) { | |
414 | case AF_INET: { | |
415 | s = src->u.prefix4.s_addr; | |
416 | s = s == 0 ? 1 : s; | |
417 | if (grp) | |
418 | g = grp->u.prefix4.s_addr; | |
419 | } break; | |
420 | default: | |
421 | break; | |
422 | } | |
423 | ||
424 | hash_val = jhash_2words(g, s, 101); | |
d62a17ae | 425 | return hash_val; |
633988a7 CS |
426 | } |
427 | ||
25b787a2 DS |
428 | int pim_ecmp_nexthop_search(struct pim_instance *pim, |
429 | struct pim_nexthop_cache *pnc, | |
d62a17ae | 430 | struct pim_nexthop *nexthop, struct prefix *src, |
431 | struct prefix *grp, int neighbor_needed) | |
633988a7 | 432 | { |
19967127 DS |
433 | struct pim_neighbor *nbrs[MULTIPATH_NUM], *nbr; |
434 | struct interface *ifps[MULTIPATH_NUM]; | |
d62a17ae | 435 | struct nexthop *nh_node = NULL; |
436 | ifindex_t first_ifindex; | |
437 | struct interface *ifp = NULL; | |
438 | uint32_t hash_val = 0, mod_val = 0; | |
439 | uint8_t nh_iter = 0, found = 0; | |
19967127 | 440 | uint32_t i, num_nbrs = 0; |
d62a17ae | 441 | |
442 | if (!pnc || !pnc->nexthop_num || !nexthop) | |
cb9c7c50 | 443 | return 0; |
d62a17ae | 444 | |
445 | // Current Nexthop is VALID, check to stay on the current path. | |
446 | if (nexthop->interface && nexthop->interface->info | |
447 | && nexthop->mrib_nexthop_addr.u.prefix4.s_addr | |
448 | != PIM_NET_INADDR_ANY) { | |
449 | /* User configured knob to explicitly switch | |
450 | to new path is disabled or current path | |
451 | metric is less than nexthop update. | |
452 | */ | |
453 | ||
4795fff7 | 454 | if (pim->ecmp_rebalance_enable == 0) { |
d62a17ae | 455 | uint8_t curr_route_valid = 0; |
456 | // Check if current nexthop is present in new updated | |
457 | // Nexthop list. | |
458 | // If the current nexthop is not valid, candidate to | |
459 | // choose new Nexthop. | |
460 | for (nh_node = pnc->nexthop; nh_node; | |
1b5f8a1a | 461 | nh_node = nh_node->next) { |
d62a17ae | 462 | curr_route_valid = (nexthop->interface->ifindex |
463 | == nh_node->ifindex); | |
1b5f8a1a DS |
464 | if (curr_route_valid) |
465 | break; | |
466 | } | |
d62a17ae | 467 | |
468 | if (curr_route_valid | |
469 | && !pim_if_connected_to_source(nexthop->interface, | |
470 | src->u.prefix4)) { | |
471 | nbr = pim_neighbor_find( | |
472 | nexthop->interface, | |
473 | nexthop->mrib_nexthop_addr.u.prefix4); | |
474 | if (!nbr | |
475 | && !if_is_loopback(nexthop->interface)) { | |
5cef40fc | 476 | if (PIM_DEBUG_PIM_NHT) |
d62a17ae | 477 | zlog_debug( |
478 | "%s: current nexthop does not have nbr ", | |
479 | __PRETTY_FUNCTION__); | |
480 | } else { | |
5cef40fc | 481 | if (PIM_DEBUG_PIM_NHT) { |
d62a17ae | 482 | char src_str[INET_ADDRSTRLEN]; |
483 | pim_inet4_dump("<addr?>", | |
484 | src->u.prefix4, | |
485 | src_str, | |
486 | sizeof(src_str)); | |
487 | char grp_str[INET_ADDRSTRLEN]; | |
488 | pim_inet4_dump("<addr?>", | |
489 | grp->u.prefix4, | |
490 | grp_str, | |
491 | sizeof(grp_str)); | |
492 | zlog_debug( | |
5cef40fc | 493 | "%s: (%s,%s)(%s) current nexthop %s is valid, skipping new path selection", |
d62a17ae | 494 | __PRETTY_FUNCTION__, |
495 | src_str, grp_str, | |
5cef40fc | 496 | pim->vrf->name, |
d62a17ae | 497 | nexthop->interface->name); |
498 | } | |
a7f95c76 | 499 | return 1; |
d62a17ae | 500 | } |
501 | } | |
502 | } | |
503 | } | |
19967127 DS |
504 | |
505 | /* | |
506 | * Look up all interfaces and neighbors, | |
507 | * store for later usage | |
508 | */ | |
509 | for (nh_node = pnc->nexthop, i = 0; nh_node; | |
510 | nh_node = nh_node->next, i++) { | |
511 | ifps[i] = if_lookup_by_index(nh_node->ifindex, pim->vrf_id); | |
512 | if (ifps[i]) { | |
513 | nbrs[i] = pim_neighbor_find(ifps[i], | |
514 | nh_node->gate.ipv4); | |
515 | if (nbrs[i] || pim_if_connected_to_source(ifps[i], | |
516 | src->u.prefix4)) | |
517 | num_nbrs++; | |
518 | } | |
519 | } | |
4795fff7 | 520 | if (pim->ecmp_enable) { |
19967127 DS |
521 | uint32_t consider = pnc->nexthop_num; |
522 | ||
523 | if (neighbor_needed && num_nbrs < consider) | |
524 | consider = num_nbrs; | |
525 | ||
526 | if (consider == 0) | |
527 | return 0; | |
528 | ||
d62a17ae | 529 | // PIM ECMP flag is enable then choose ECMP path. |
530 | hash_val = pim_compute_ecmp_hash(src, grp); | |
19967127 | 531 | mod_val = hash_val % consider; |
d62a17ae | 532 | } |
533 | ||
534 | for (nh_node = pnc->nexthop; nh_node && (found == 0); | |
535 | nh_node = nh_node->next) { | |
536 | first_ifindex = nh_node->ifindex; | |
19967127 | 537 | ifp = ifps[nh_iter]; |
d62a17ae | 538 | if (!ifp) { |
5cef40fc | 539 | if (PIM_DEBUG_PIM_NHT) { |
d62a17ae | 540 | char addr_str[INET_ADDRSTRLEN]; |
541 | pim_inet4_dump("<addr?>", src->u.prefix4, | |
542 | addr_str, sizeof(addr_str)); | |
543 | zlog_debug( | |
5cef40fc | 544 | "%s %s: could not find interface for ifindex %d (address %s(%s))", |
d62a17ae | 545 | __FILE__, __PRETTY_FUNCTION__, |
5cef40fc DS |
546 | first_ifindex, addr_str, |
547 | pim->vrf->name); | |
d62a17ae | 548 | } |
549 | if (nh_iter == mod_val) | |
550 | mod_val++; // Select nexthpath | |
551 | nh_iter++; | |
552 | continue; | |
553 | } | |
554 | if (!ifp->info) { | |
5cef40fc | 555 | if (PIM_DEBUG_PIM_NHT) { |
d62a17ae | 556 | char addr_str[INET_ADDRSTRLEN]; |
557 | pim_inet4_dump("<addr?>", src->u.prefix4, | |
558 | addr_str, sizeof(addr_str)); | |
559 | zlog_debug( | |
5cef40fc | 560 | "%s: multicast not enabled on input interface %s(%s) (ifindex=%d, RPF for source %s)", |
d62a17ae | 561 | __PRETTY_FUNCTION__, ifp->name, |
5cef40fc DS |
562 | pim->vrf->name, first_ifindex, |
563 | addr_str); | |
d62a17ae | 564 | } |
565 | if (nh_iter == mod_val) | |
566 | mod_val++; // Select nexthpath | |
567 | nh_iter++; | |
568 | continue; | |
569 | } | |
570 | ||
571 | if (neighbor_needed | |
572 | && !pim_if_connected_to_source(ifp, src->u.prefix4)) { | |
19967127 | 573 | nbr = nbrs[nh_iter]; |
d62a17ae | 574 | if (!nbr && !if_is_loopback(ifp)) { |
5cef40fc | 575 | if (PIM_DEBUG_PIM_NHT) |
d62a17ae | 576 | zlog_debug( |
5cef40fc DS |
577 | "%s: pim nbr not found on input interface %s(%s)", |
578 | __PRETTY_FUNCTION__, ifp->name, | |
579 | pim->vrf->name); | |
d62a17ae | 580 | if (nh_iter == mod_val) |
581 | mod_val++; // Select nexthpath | |
582 | nh_iter++; | |
583 | continue; | |
584 | } | |
585 | } | |
586 | ||
587 | if (nh_iter == mod_val) { | |
588 | nexthop->interface = ifp; | |
589 | nexthop->mrib_nexthop_addr.family = AF_INET; | |
590 | nexthop->mrib_nexthop_addr.prefixlen = IPV4_MAX_BITLEN; | |
591 | nexthop->mrib_nexthop_addr.u.prefix4 = | |
592 | nh_node->gate.ipv4; | |
593 | nexthop->mrib_metric_preference = pnc->distance; | |
594 | nexthop->mrib_route_metric = pnc->metric; | |
595 | nexthop->last_lookup = src->u.prefix4; | |
596 | nexthop->last_lookup_time = pim_time_monotonic_usec(); | |
597 | nexthop->nbr = nbr; | |
598 | found = 1; | |
5cef40fc | 599 | if (PIM_DEBUG_PIM_NHT) { |
d62a17ae | 600 | char buf[INET_ADDRSTRLEN]; |
601 | char buf2[INET_ADDRSTRLEN]; | |
602 | char buf3[INET_ADDRSTRLEN]; | |
603 | pim_inet4_dump("<src?>", src->u.prefix4, buf2, | |
604 | sizeof(buf2)); | |
605 | pim_inet4_dump("<grp?>", grp->u.prefix4, buf3, | |
606 | sizeof(buf3)); | |
607 | pim_inet4_dump( | |
608 | "<rpf?>", | |
609 | nexthop->mrib_nexthop_addr.u.prefix4, | |
610 | buf, sizeof(buf)); | |
611 | zlog_debug( | |
5cef40fc | 612 | "%s: (%s,%s)(%s) selected nhop interface %s addr %s mod_val %u iter %d ecmp %d", |
d62a17ae | 613 | __PRETTY_FUNCTION__, buf2, buf3, |
5cef40fc | 614 | pim->vrf->name, ifp->name, buf, mod_val, |
4795fff7 | 615 | nh_iter, pim->ecmp_enable); |
d62a17ae | 616 | } |
617 | } | |
618 | nh_iter++; | |
619 | } | |
620 | ||
621 | if (found) | |
cb9c7c50 | 622 | return 1; |
d62a17ae | 623 | else |
cb9c7c50 | 624 | return 0; |
633988a7 CS |
625 | } |
626 | ||
d62a17ae | 627 | /* This API is used to parse Registered address nexthop update coming from Zebra |
628 | */ | |
629 | int pim_parse_nexthop_update(int command, struct zclient *zclient, | |
630 | zebra_size_t length, vrf_id_t vrf_id) | |
1bc98276 | 631 | { |
d62a17ae | 632 | struct nexthop *nexthop; |
633 | struct nexthop *nhlist_head = NULL; | |
634 | struct nexthop *nhlist_tail = NULL; | |
d62a17ae | 635 | int i; |
636 | struct pim_rpf rpf; | |
637 | struct pim_nexthop_cache *pnc = NULL; | |
638 | struct pim_neighbor *nbr = NULL; | |
639 | struct interface *ifp = NULL; | |
640 | struct interface *ifp1 = NULL; | |
cf663ceb | 641 | struct vrf *vrf = vrf_lookup_by_id(vrf_id); |
819f099b | 642 | struct pim_instance *pim; |
4a749e2c | 643 | struct zapi_route nhr; |
819f099b DS |
644 | |
645 | if (!vrf) | |
646 | return 0; | |
647 | pim = vrf->info; | |
d62a17ae | 648 | |
7d30a959 DS |
649 | if (!zapi_nexthop_update_decode(zclient->ibuf, &nhr)) { |
650 | if (PIM_DEBUG_PIM_NHT) | |
996c9314 LB |
651 | zlog_debug( |
652 | "%s: Decode of nexthop update from zebra failed", | |
653 | __PRETTY_FUNCTION__); | |
7d30a959 DS |
654 | return 0; |
655 | } | |
d62a17ae | 656 | |
657 | if (command == ZEBRA_NEXTHOP_UPDATE) { | |
4a749e2c | 658 | prefix_copy(&rpf.rpf_addr, &nhr.prefix); |
25b787a2 | 659 | pnc = pim_nexthop_cache_find(pim, &rpf); |
d62a17ae | 660 | if (!pnc) { |
5cef40fc | 661 | if (PIM_DEBUG_PIM_NHT) { |
d62a17ae | 662 | char buf[PREFIX2STR_BUFFER]; |
663 | prefix2str(&rpf.rpf_addr, buf, sizeof(buf)); | |
664 | zlog_debug( | |
665 | "%s: Skipping NHT update, addr %s is not in local cached DB.", | |
666 | __PRETTY_FUNCTION__, buf); | |
667 | } | |
668 | return 0; | |
669 | } | |
670 | } else { | |
671 | /* | |
672 | * We do not currently handle ZEBRA_IMPORT_CHECK_UPDATE | |
673 | */ | |
674 | return 0; | |
675 | } | |
676 | ||
677 | pnc->last_update = pim_time_monotonic_usec(); | |
d62a17ae | 678 | |
4a749e2c | 679 | if (nhr.nexthop_num) { |
d62a17ae | 680 | pnc->nexthop_num = 0; // Only increment for pim enabled rpf. |
681 | ||
4a749e2c DS |
682 | for (i = 0; i < nhr.nexthop_num; i++) { |
683 | nexthop = nexthop_from_zapi_nexthop(&nhr.nexthops[i]); | |
d62a17ae | 684 | switch (nexthop->type) { |
685 | case NEXTHOP_TYPE_IPV4: | |
d62a17ae | 686 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
d62a17ae | 687 | case NEXTHOP_TYPE_IPV6: |
4a749e2c | 688 | case NEXTHOP_TYPE_BLACKHOLE: |
d62a17ae | 689 | break; |
66f5152f MB |
690 | case NEXTHOP_TYPE_IFINDEX: |
691 | /* | |
692 | * Connected route (i.e. no nexthop), use | |
693 | * RPF address from nexthop cache (i.e. | |
694 | * destination) as PIM nexthop. | |
695 | */ | |
56c1568b | 696 | nexthop->type = NEXTHOP_TYPE_IPV4_IFINDEX; |
66f5152f MB |
697 | nexthop->gate.ipv4 = |
698 | pnc->rpf.rpf_addr.u.prefix4; | |
699 | break; | |
d62a17ae | 700 | case NEXTHOP_TYPE_IPV6_IFINDEX: |
d62a17ae | 701 | ifp1 = if_lookup_by_index(nexthop->ifindex, |
25b787a2 | 702 | pim->vrf_id); |
d62a17ae | 703 | nbr = pim_neighbor_find_if(ifp1); |
704 | /* Overwrite with Nbr address as NH addr */ | |
5cef40fc | 705 | if (nbr) |
d62a17ae | 706 | nexthop->gate.ipv4 = nbr->source_addr; |
5cef40fc | 707 | else { |
d62a17ae | 708 | // Mark nexthop address to 0 until PIM |
709 | // Nbr is resolved. | |
710 | nexthop->gate.ipv4.s_addr = | |
711 | PIM_NET_INADDR_ANY; | |
712 | } | |
713 | ||
d62a17ae | 714 | break; |
715 | } | |
716 | ||
25b787a2 | 717 | ifp = if_lookup_by_index(nexthop->ifindex, pim->vrf_id); |
d62a17ae | 718 | if (!ifp) { |
5cef40fc | 719 | if (PIM_DEBUG_PIM_NHT) { |
d62a17ae | 720 | char buf[NEXTHOP_STRLEN]; |
721 | zlog_debug( | |
5cef40fc | 722 | "%s: could not find interface for ifindex %d(%s) (addr %s)", |
d62a17ae | 723 | __PRETTY_FUNCTION__, |
724 | nexthop->ifindex, | |
5cef40fc | 725 | pim->vrf->name, |
d62a17ae | 726 | nexthop2str(nexthop, buf, |
727 | sizeof(buf))); | |
728 | } | |
729 | nexthop_free(nexthop); | |
730 | continue; | |
731 | } | |
732 | ||
1b5f8a1a DS |
733 | if (PIM_DEBUG_PIM_NHT) { |
734 | char p_str[PREFIX2STR_BUFFER]; | |
4a749e2c DS |
735 | |
736 | prefix2str(&nhr.prefix, p_str, sizeof(p_str)); | |
1b5f8a1a DS |
737 | zlog_debug( |
738 | "%s: NHT addr %s(%s) %d-nhop via %s(%s) type %d distance:%u metric:%u ", | |
739 | __PRETTY_FUNCTION__, p_str, | |
740 | pim->vrf->name, i + 1, | |
741 | inet_ntoa(nexthop->gate.ipv4), | |
4a749e2c DS |
742 | ifp->name, nexthop->type, nhr.distance, |
743 | nhr.metric); | |
1b5f8a1a DS |
744 | } |
745 | ||
d62a17ae | 746 | if (!ifp->info) { |
5cef40fc | 747 | if (PIM_DEBUG_PIM_NHT) { |
d62a17ae | 748 | char buf[NEXTHOP_STRLEN]; |
4a749e2c | 749 | |
d62a17ae | 750 | zlog_debug( |
5cef40fc | 751 | "%s: multicast not enabled on input interface %s(%s) (ifindex=%d, addr %s)", |
d62a17ae | 752 | __PRETTY_FUNCTION__, ifp->name, |
5cef40fc | 753 | pim->vrf->name, |
d62a17ae | 754 | nexthop->ifindex, |
755 | nexthop2str(nexthop, buf, | |
756 | sizeof(buf))); | |
757 | } | |
758 | nexthop_free(nexthop); | |
759 | continue; | |
760 | } | |
761 | ||
762 | if (nhlist_tail) { | |
763 | nhlist_tail->next = nexthop; | |
764 | nhlist_tail = nexthop; | |
765 | } else { | |
766 | nhlist_tail = nexthop; | |
767 | nhlist_head = nexthop; | |
768 | } | |
769 | // Only keep track of nexthops which are PIM enabled. | |
770 | pnc->nexthop_num++; | |
771 | } | |
772 | /* Reset existing pnc->nexthop before assigning new list */ | |
773 | nexthops_free(pnc->nexthop); | |
774 | pnc->nexthop = nhlist_head; | |
775 | if (pnc->nexthop_num) { | |
776 | pnc->flags |= PIM_NEXTHOP_VALID; | |
4a749e2c DS |
777 | pnc->distance = nhr.distance; |
778 | pnc->metric = nhr.metric; | |
d62a17ae | 779 | } |
780 | } else { | |
781 | pnc->flags &= ~PIM_NEXTHOP_VALID; | |
4a749e2c | 782 | pnc->nexthop_num = nhr.nexthop_num; |
d62a17ae | 783 | nexthops_free(pnc->nexthop); |
784 | pnc->nexthop = NULL; | |
785 | } | |
786 | ||
5cef40fc | 787 | if (PIM_DEBUG_PIM_NHT) { |
d62a17ae | 788 | char buf[PREFIX2STR_BUFFER]; |
4a749e2c | 789 | prefix2str(&nhr.prefix, buf, sizeof(buf)); |
d62a17ae | 790 | zlog_debug( |
87ad28f4 | 791 | "%s: NHT Update for %s(%s) num_nh %d num_pim_nh %d vrf:%u up %ld rp %d", |
4a749e2c DS |
792 | __PRETTY_FUNCTION__, buf, pim->vrf->name, |
793 | nhr.nexthop_num, pnc->nexthop_num, vrf_id, | |
996c9314 | 794 | pnc->upstream_hash->count, listcount(pnc->rp_list)); |
d62a17ae | 795 | } |
796 | ||
bfc92019 | 797 | pim_rpf_set_refresh_time(pim); |
d62a17ae | 798 | |
799 | if (listcount(pnc->rp_list)) | |
25b787a2 | 800 | pim_update_rp_nh(pim, pnc); |
7c591950 | 801 | if (pnc->upstream_hash->count) |
cf663ceb | 802 | pim_update_upstream_nh(pim, pnc); |
d62a17ae | 803 | |
804 | return 0; | |
1bc98276 | 805 | } |
633988a7 | 806 | |
25b787a2 DS |
807 | int pim_ecmp_nexthop_lookup(struct pim_instance *pim, |
808 | struct pim_nexthop *nexthop, struct in_addr addr, | |
d62a17ae | 809 | struct prefix *src, struct prefix *grp, |
810 | int neighbor_needed) | |
633988a7 | 811 | { |
d62a17ae | 812 | struct pim_zlookup_nexthop nexthop_tab[MULTIPATH_NUM]; |
19967127 | 813 | struct pim_neighbor *nbrs[MULTIPATH_NUM], *nbr = NULL; |
d62a17ae | 814 | int num_ifindex; |
19967127 | 815 | struct interface *ifps[MULTIPATH_NUM], *ifp; |
d62a17ae | 816 | int first_ifindex; |
817 | int found = 0; | |
818 | uint8_t i = 0; | |
819 | uint32_t hash_val = 0, mod_val = 0; | |
19967127 | 820 | uint32_t num_nbrs = 0; |
d62a17ae | 821 | |
5cef40fc | 822 | if (PIM_DEBUG_PIM_NHT) { |
d62a17ae | 823 | char addr_str[INET_ADDRSTRLEN]; |
824 | pim_inet4_dump("<addr?>", addr, addr_str, sizeof(addr_str)); | |
5cef40fc DS |
825 | zlog_debug("%s: Looking up: %s(%s), last lookup time: %lld", |
826 | __PRETTY_FUNCTION__, addr_str, pim->vrf->name, | |
d62a17ae | 827 | nexthop->last_lookup_time); |
828 | } | |
829 | ||
830 | memset(nexthop_tab, 0, | |
831 | sizeof(struct pim_zlookup_nexthop) * MULTIPATH_NUM); | |
71edad0f DS |
832 | num_ifindex = zclient_lookup_nexthop(pim, nexthop_tab, MULTIPATH_NUM, |
833 | addr, PIM_NEXTHOP_LOOKUP_MAX); | |
d62a17ae | 834 | if (num_ifindex < 1) { |
209a5679 DS |
835 | if (PIM_DEBUG_PIM_NHT) { |
836 | char addr_str[INET_ADDRSTRLEN]; | |
996c9314 LB |
837 | pim_inet4_dump("<addr?>", addr, addr_str, |
838 | sizeof(addr_str)); | |
209a5679 DS |
839 | zlog_warn( |
840 | "%s: could not find nexthop ifindex for address %s(%s)", | |
996c9314 | 841 | __PRETTY_FUNCTION__, addr_str, pim->vrf->name); |
209a5679 | 842 | } |
cb9c7c50 | 843 | return 0; |
d62a17ae | 844 | } |
845 | ||
19967127 DS |
846 | /* |
847 | * Look up all interfaces and neighbors, | |
848 | * store for later usage | |
849 | */ | |
850 | for (i = 0; i < num_ifindex; i++) { | |
851 | ifps[i] = if_lookup_by_index(nexthop_tab[i].ifindex, | |
852 | pim->vrf_id); | |
853 | if (ifps[i]) { | |
854 | nbrs[i] = pim_neighbor_find( | |
855 | ifps[i], nexthop_tab[i].nexthop_addr.u.prefix4); | |
856 | if (nbrs[i] || pim_if_connected_to_source(ifps[i], | |
857 | addr)) | |
858 | num_nbrs++; | |
859 | } | |
860 | } | |
861 | ||
d62a17ae | 862 | // If PIM ECMP enable then choose ECMP path. |
4795fff7 | 863 | if (pim->ecmp_enable) { |
19967127 DS |
864 | uint32_t consider = num_ifindex; |
865 | ||
866 | if (neighbor_needed && num_nbrs < consider) | |
867 | consider = num_nbrs; | |
868 | ||
869 | if (consider == 0) | |
870 | return 0; | |
871 | ||
d62a17ae | 872 | hash_val = pim_compute_ecmp_hash(src, grp); |
19967127 | 873 | mod_val = hash_val % consider; |
5cef40fc | 874 | if (PIM_DEBUG_PIM_NHT_DETAIL) |
d62a17ae | 875 | zlog_debug("%s: hash_val %u mod_val %u", |
876 | __PRETTY_FUNCTION__, hash_val, mod_val); | |
877 | } | |
878 | ||
19967127 | 879 | i = 0; |
d62a17ae | 880 | while (!found && (i < num_ifindex)) { |
881 | first_ifindex = nexthop_tab[i].ifindex; | |
882 | ||
19967127 | 883 | ifp = ifps[i]; |
d62a17ae | 884 | if (!ifp) { |
5cef40fc | 885 | if (PIM_DEBUG_PIM_NHT) { |
d62a17ae | 886 | char addr_str[INET_ADDRSTRLEN]; |
887 | pim_inet4_dump("<addr?>", addr, addr_str, | |
888 | sizeof(addr_str)); | |
889 | zlog_debug( | |
5cef40fc | 890 | "%s %s: could not find interface for ifindex %d (address %s(%s))", |
d62a17ae | 891 | __FILE__, __PRETTY_FUNCTION__, |
5cef40fc DS |
892 | first_ifindex, addr_str, |
893 | pim->vrf->name); | |
d62a17ae | 894 | } |
895 | if (i == mod_val) | |
896 | mod_val++; | |
897 | i++; | |
898 | continue; | |
899 | } | |
900 | ||
901 | if (!ifp->info) { | |
5cef40fc | 902 | if (PIM_DEBUG_PIM_NHT) { |
d62a17ae | 903 | char addr_str[INET_ADDRSTRLEN]; |
904 | pim_inet4_dump("<addr?>", addr, addr_str, | |
905 | sizeof(addr_str)); | |
906 | zlog_debug( | |
5cef40fc | 907 | "%s: multicast not enabled on input interface %s(%s) (ifindex=%d, RPF for source %s)", |
d62a17ae | 908 | __PRETTY_FUNCTION__, ifp->name, |
5cef40fc DS |
909 | pim->vrf->name, first_ifindex, |
910 | addr_str); | |
d62a17ae | 911 | } |
912 | if (i == mod_val) | |
913 | mod_val++; | |
914 | i++; | |
915 | continue; | |
916 | } | |
917 | if (neighbor_needed && !pim_if_connected_to_source(ifp, addr)) { | |
19967127 | 918 | nbr = nbrs[i]; |
5cef40fc DS |
919 | if (PIM_DEBUG_PIM_NHT_DETAIL) |
920 | zlog_debug("ifp name: %s(%s), pim nbr: %p", | |
921 | ifp->name, pim->vrf->name, nbr); | |
d62a17ae | 922 | if (!nbr && !if_is_loopback(ifp)) { |
923 | if (i == mod_val) | |
924 | mod_val++; | |
925 | i++; | |
5cef40fc | 926 | if (PIM_DEBUG_PIM_NHT) { |
d62a17ae | 927 | char addr_str[INET_ADDRSTRLEN]; |
928 | pim_inet4_dump("<addr?>", addr, | |
929 | addr_str, | |
930 | sizeof(addr_str)); | |
931 | zlog_debug( | |
5cef40fc | 932 | "%s: NBR not found on input interface %s(%s) (RPF for source %s)", |
d62a17ae | 933 | __PRETTY_FUNCTION__, ifp->name, |
5cef40fc | 934 | pim->vrf->name, addr_str); |
d62a17ae | 935 | } |
936 | continue; | |
937 | } | |
938 | } | |
939 | ||
940 | if (i == mod_val) { | |
5cef40fc | 941 | if (PIM_DEBUG_PIM_NHT) { |
d62a17ae | 942 | char nexthop_str[PREFIX_STRLEN]; |
943 | char addr_str[INET_ADDRSTRLEN]; | |
944 | pim_addr_dump("<nexthop?>", | |
945 | &nexthop_tab[i].nexthop_addr, | |
946 | nexthop_str, sizeof(nexthop_str)); | |
947 | pim_inet4_dump("<addr?>", addr, addr_str, | |
948 | sizeof(addr_str)); | |
949 | zlog_debug( | |
5cef40fc DS |
950 | "%s: found nhop %s for addr %s interface %s(%s) metric %d dist %d", |
951 | __PRETTY_FUNCTION__, nexthop_str, | |
952 | addr_str, ifp->name, pim->vrf->name, | |
d62a17ae | 953 | nexthop_tab[i].route_metric, |
954 | nexthop_tab[i].protocol_distance); | |
955 | } | |
1a81b790 | 956 | /* update nexthop data */ |
d62a17ae | 957 | nexthop->interface = ifp; |
958 | nexthop->mrib_nexthop_addr = | |
959 | nexthop_tab[i].nexthop_addr; | |
960 | nexthop->mrib_metric_preference = | |
961 | nexthop_tab[i].protocol_distance; | |
962 | nexthop->mrib_route_metric = | |
963 | nexthop_tab[i].route_metric; | |
964 | nexthop->last_lookup = addr; | |
965 | nexthop->last_lookup_time = pim_time_monotonic_usec(); | |
966 | nexthop->nbr = nbr; | |
967 | found = 1; | |
968 | } | |
969 | i++; | |
970 | } | |
cb9c7c50 | 971 | |
d62a17ae | 972 | if (found) |
cb9c7c50 | 973 | return 1; |
d62a17ae | 974 | else |
cb9c7c50 | 975 | return 0; |
633988a7 | 976 | } |
815c33c9 | 977 | |
25b787a2 DS |
978 | int pim_ecmp_fib_lookup_if_vif_index(struct pim_instance *pim, |
979 | struct in_addr addr, struct prefix *src, | |
d62a17ae | 980 | struct prefix *grp) |
815c33c9 | 981 | { |
8a5134aa | 982 | struct pim_nexthop nhop; |
d62a17ae | 983 | int vif_index; |
8a5134aa | 984 | ifindex_t ifindex; |
d62a17ae | 985 | |
8a5134aa | 986 | if (!pim_ecmp_nexthop_lookup(pim, &nhop, addr, src, grp, 0)) { |
5cef40fc | 987 | if (PIM_DEBUG_PIM_NHT) { |
d62a17ae | 988 | char addr_str[INET_ADDRSTRLEN]; |
989 | pim_inet4_dump("<addr?>", addr, addr_str, | |
990 | sizeof(addr_str)); | |
991 | zlog_debug( | |
5cef40fc DS |
992 | "%s: could not find nexthop ifindex for address %s(%s)", |
993 | __PRETTY_FUNCTION__, addr_str, pim->vrf->name); | |
d62a17ae | 994 | } |
995 | return -1; | |
996 | } | |
997 | ||
8a5134aa | 998 | ifindex = nhop.interface->ifindex; |
5cef40fc | 999 | if (PIM_DEBUG_PIM_NHT) { |
d62a17ae | 1000 | char addr_str[INET_ADDRSTRLEN]; |
1001 | pim_inet4_dump("<ifaddr?>", addr, addr_str, sizeof(addr_str)); | |
1002 | zlog_debug( | |
5cef40fc | 1003 | "%s: found nexthop ifindex=%d (interface %s(%s)) for address %s", |
8a5134aa DS |
1004 | __PRETTY_FUNCTION__, ifindex, |
1005 | ifindex2ifname(ifindex, pim->vrf_id), | |
5cef40fc | 1006 | pim->vrf->name, addr_str); |
d62a17ae | 1007 | } |
1008 | ||
8a5134aa | 1009 | vif_index = pim_if_find_vifindex_by_ifindex(pim, ifindex); |
d62a17ae | 1010 | |
1011 | if (vif_index < 0) { | |
5cef40fc | 1012 | if (PIM_DEBUG_PIM_NHT) { |
d62a17ae | 1013 | char addr_str[INET_ADDRSTRLEN]; |
1014 | pim_inet4_dump("<addr?>", addr, addr_str, | |
1015 | sizeof(addr_str)); | |
1016 | zlog_debug( | |
5cef40fc DS |
1017 | "%s: low vif_index=%d(%s) < 1 nexthop for address %s", |
1018 | __PRETTY_FUNCTION__, vif_index, pim->vrf->name, | |
d62a17ae | 1019 | addr_str); |
1020 | } | |
1021 | return -2; | |
1022 | } | |
1023 | ||
1024 | return vif_index; | |
815c33c9 | 1025 | } |