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fb018d25 DS |
1 | /* BGP Nexthop tracking |
2 | * Copyright (C) 2013 Cumulus Networks, Inc. | |
3 | * | |
4 | * This file is part of GNU Zebra. | |
5 | * | |
6 | * GNU Zebra is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2, or (at your option) any | |
9 | * later version. | |
10 | * | |
11 | * GNU Zebra 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 | |
fb018d25 DS |
19 | */ |
20 | ||
21 | #include <zebra.h> | |
22 | ||
23 | #include "command.h" | |
24 | #include "thread.h" | |
25 | #include "prefix.h" | |
26 | #include "zclient.h" | |
27 | #include "stream.h" | |
28 | #include "network.h" | |
29 | #include "log.h" | |
30 | #include "memory.h" | |
31 | #include "nexthop.h" | |
7076bb2f | 32 | #include "vrf.h" |
039f3a34 | 33 | #include "filter.h" |
fb018d25 DS |
34 | |
35 | #include "bgpd/bgpd.h" | |
36 | #include "bgpd/bgp_table.h" | |
37 | #include "bgpd/bgp_route.h" | |
38 | #include "bgpd/bgp_attr.h" | |
39 | #include "bgpd/bgp_nexthop.h" | |
40 | #include "bgpd/bgp_debug.h" | |
14454c9f | 41 | #include "bgpd/bgp_errors.h" |
fb018d25 | 42 | #include "bgpd/bgp_nht.h" |
ffd0c037 | 43 | #include "bgpd/bgp_fsm.h" |
afbb1c59 | 44 | #include "bgpd/bgp_zebra.h" |
0378bcaa | 45 | #include "bgpd/bgp_flowspec_util.h" |
7c312383 | 46 | #include "bgpd/bgp_evpn.h" |
9e15d76a | 47 | #include "bgpd/bgp_rd.h" |
fb018d25 DS |
48 | |
49 | extern struct zclient *zclient; | |
fb018d25 | 50 | |
078430f6 | 51 | static void register_zebra_rnh(struct bgp_nexthop_cache *bnc, |
d62a17ae | 52 | int is_bgp_static_route); |
078430f6 DS |
53 | static void unregister_zebra_rnh(struct bgp_nexthop_cache *bnc, |
54 | int is_bgp_static_route); | |
fb018d25 | 55 | static void evaluate_paths(struct bgp_nexthop_cache *bnc); |
40381db7 | 56 | static int make_prefix(int afi, struct bgp_path_info *pi, struct prefix *p); |
fb018d25 | 57 | |
d62a17ae | 58 | static int bgp_isvalid_nexthop(struct bgp_nexthop_cache *bnc) |
d4d9d757 | 59 | { |
d62a17ae | 60 | return (bgp_zebra_num_connects() == 0 |
61 | || (bnc && CHECK_FLAG(bnc->flags, BGP_NEXTHOP_VALID))); | |
d4d9d757 LB |
62 | } |
63 | ||
960035b2 PZ |
64 | static int bgp_isvalid_labeled_nexthop(struct bgp_nexthop_cache *bnc) |
65 | { | |
66 | return (bgp_zebra_num_connects() == 0 | |
67 | || (bnc && CHECK_FLAG(bnc->flags, BGP_NEXTHOP_LABELED_VALID))); | |
68 | } | |
69 | ||
d62a17ae | 70 | static void bgp_unlink_nexthop_check(struct bgp_nexthop_cache *bnc) |
fb018d25 | 71 | { |
d5c4bac9 | 72 | if (LIST_EMPTY(&(bnc->paths)) && !bnc->nht_info) { |
d62a17ae | 73 | if (BGP_DEBUG(nht, NHT)) { |
74 | char buf[PREFIX2STR_BUFFER]; | |
84c320dc | 75 | zlog_debug("%s: freeing bnc %s(%u)(%s)", __func__, |
8c1a4c10 | 76 | bnc_str(bnc, buf, PREFIX2STR_BUFFER), |
545aeef1 | 77 | bnc->srte_color, bnc->bgp->name_pretty); |
d62a17ae | 78 | } |
e37e1e27 PR |
79 | /* only unregister if this is the last nh for this prefix*/ |
80 | if (!bnc_existing_for_prefix(bnc)) | |
81 | unregister_zebra_rnh( | |
82 | bnc, CHECK_FLAG(bnc->flags, BGP_STATIC_ROUTE)); | |
d62a17ae | 83 | bnc_free(bnc); |
fb018d25 | 84 | } |
fb018d25 DS |
85 | } |
86 | ||
4b7e6066 | 87 | void bgp_unlink_nexthop(struct bgp_path_info *path) |
f9164b1d | 88 | { |
d62a17ae | 89 | struct bgp_nexthop_cache *bnc = path->nexthop; |
90 | ||
91 | if (!bnc) | |
92 | return; | |
f9164b1d | 93 | |
7f040da1 | 94 | path_nh_map(path, NULL, false); |
f9164b1d | 95 | |
d62a17ae | 96 | bgp_unlink_nexthop_check(bnc); |
f9164b1d PJ |
97 | } |
98 | ||
d62a17ae | 99 | void bgp_unlink_nexthop_by_peer(struct peer *peer) |
f9164b1d | 100 | { |
d62a17ae | 101 | struct prefix p; |
d62a17ae | 102 | struct bgp_nexthop_cache *bnc; |
103 | afi_t afi = family2afi(peer->su.sa.sa_family); | |
104 | ||
105 | if (!sockunion2hostprefix(&peer->su, &p)) | |
106 | return; | |
107 | ||
545aeef1 | 108 | bnc = bnc_find(&peer->bgp->nexthop_cache_table[afi], &p, 0); |
14315f2d | 109 | if (!bnc) |
d62a17ae | 110 | return; |
111 | ||
d62a17ae | 112 | /* cleanup the peer reference */ |
113 | bnc->nht_info = NULL; | |
114 | ||
115 | bgp_unlink_nexthop_check(bnc); | |
f9164b1d PJ |
116 | } |
117 | ||
960035b2 PZ |
118 | /* |
119 | * A route and its nexthop might belong to different VRFs. Therefore, | |
120 | * we need both the bgp_route and bgp_nexthop pointers. | |
121 | */ | |
122 | int bgp_find_or_add_nexthop(struct bgp *bgp_route, struct bgp *bgp_nexthop, | |
40381db7 | 123 | afi_t afi, struct bgp_path_info *pi, |
d62a17ae | 124 | struct peer *peer, int connected) |
fb018d25 | 125 | { |
f663c581 | 126 | struct bgp_nexthop_cache_head *tree = NULL; |
d62a17ae | 127 | struct bgp_nexthop_cache *bnc; |
128 | struct prefix p; | |
545aeef1 | 129 | uint32_t srte_color = 0; |
d62a17ae | 130 | int is_bgp_static_route = 0; |
131 | ||
40381db7 DS |
132 | if (pi) { |
133 | is_bgp_static_route = ((pi->type == ZEBRA_ROUTE_BGP) | |
134 | && (pi->sub_type == BGP_ROUTE_STATIC)) | |
d62a17ae | 135 | ? 1 |
136 | : 0; | |
137 | ||
138 | /* Since Extended Next-hop Encoding (RFC5549) support, we want | |
139 | to derive | |
140 | address-family from the next-hop. */ | |
141 | if (!is_bgp_static_route) | |
40381db7 | 142 | afi = BGP_ATTR_NEXTHOP_AFI_IP6(pi->attr) ? AFI_IP6 |
d62a17ae | 143 | : AFI_IP; |
144 | ||
92d6f769 K |
145 | /* Validation for the ipv4 mapped ipv6 nexthop. */ |
146 | if (IS_MAPPED_IPV6(&pi->attr->mp_nexthop_global)) { | |
147 | afi = AFI_IP; | |
148 | } | |
149 | ||
2951a7a4 | 150 | /* This will return true if the global IPv6 NH is a link local |
d62a17ae | 151 | * addr */ |
40381db7 | 152 | if (make_prefix(afi, pi, &p) < 0) |
d62a17ae | 153 | return 1; |
545aeef1 RW |
154 | |
155 | srte_color = pi->attr->srte_color; | |
d62a17ae | 156 | } else if (peer) { |
d62a17ae | 157 | if (!sockunion2hostprefix(&peer->su, &p)) { |
158 | if (BGP_DEBUG(nht, NHT)) { | |
159 | zlog_debug( | |
160 | "%s: Attempting to register with unknown AFI %d (not %d or %d)", | |
15569c58 | 161 | __func__, afi, AFI_IP, AFI_IP6); |
d62a17ae | 162 | } |
163 | return 0; | |
164 | } | |
165 | } else | |
166 | return 0; | |
167 | ||
168 | if (is_bgp_static_route) | |
f663c581 | 169 | tree = &bgp_nexthop->import_check_table[afi]; |
d62a17ae | 170 | else |
f663c581 | 171 | tree = &bgp_nexthop->nexthop_cache_table[afi]; |
d62a17ae | 172 | |
545aeef1 | 173 | bnc = bnc_find(tree, &p, srte_color); |
14315f2d | 174 | if (!bnc) { |
545aeef1 | 175 | bnc = bnc_new(tree, &p, srte_color); |
960035b2 | 176 | bnc->bgp = bgp_nexthop; |
d62a17ae | 177 | if (BGP_DEBUG(nht, NHT)) { |
178 | char buf[PREFIX2STR_BUFFER]; | |
179 | ||
545aeef1 | 180 | zlog_debug("Allocated bnc %s(%u)(%s) peer %p", |
8c1a4c10 | 181 | bnc_str(bnc, buf, PREFIX2STR_BUFFER), |
545aeef1 RW |
182 | bnc->srte_color, bnc->bgp->name_pretty, |
183 | peer); | |
d62a17ae | 184 | } |
fc9a856f | 185 | } |
d62a17ae | 186 | |
d62a17ae | 187 | if (is_bgp_static_route) { |
188 | SET_FLAG(bnc->flags, BGP_STATIC_ROUTE); | |
189 | ||
190 | /* If we're toggling the type, re-register */ | |
892fedb6 | 191 | if ((CHECK_FLAG(bgp_route->flags, BGP_FLAG_IMPORT_CHECK)) |
d62a17ae | 192 | && !CHECK_FLAG(bnc->flags, BGP_STATIC_ROUTE_EXACT_MATCH)) { |
193 | SET_FLAG(bnc->flags, BGP_STATIC_ROUTE_EXACT_MATCH); | |
194 | UNSET_FLAG(bnc->flags, BGP_NEXTHOP_REGISTERED); | |
195 | UNSET_FLAG(bnc->flags, BGP_NEXTHOP_VALID); | |
892fedb6 DA |
196 | } else if ((!CHECK_FLAG(bgp_route->flags, |
197 | BGP_FLAG_IMPORT_CHECK)) | |
d62a17ae | 198 | && CHECK_FLAG(bnc->flags, |
199 | BGP_STATIC_ROUTE_EXACT_MATCH)) { | |
200 | UNSET_FLAG(bnc->flags, BGP_STATIC_ROUTE_EXACT_MATCH); | |
201 | UNSET_FLAG(bnc->flags, BGP_NEXTHOP_REGISTERED); | |
202 | UNSET_FLAG(bnc->flags, BGP_NEXTHOP_VALID); | |
203 | } | |
078430f6 | 204 | } |
d62a17ae | 205 | /* When nexthop is already known, but now requires 'connected' |
206 | * resolution, | |
207 | * re-register it. The reverse scenario where the nexthop currently | |
208 | * requires | |
209 | * 'connected' resolution does not need a re-register (i.e., we treat | |
210 | * 'connected-required' as an override) except in the scenario where | |
211 | * this | |
212 | * is actually a case of tracking a peer for connectivity (e.g., after | |
213 | * disable connected-check). | |
214 | * NOTE: We don't track the number of paths separately for 'connected- | |
215 | * required' vs 'connected-not-required' as this change is not a common | |
216 | * scenario. | |
217 | */ | |
218 | else if (connected && !CHECK_FLAG(bnc->flags, BGP_NEXTHOP_CONNECTED)) { | |
219 | SET_FLAG(bnc->flags, BGP_NEXTHOP_CONNECTED); | |
220 | UNSET_FLAG(bnc->flags, BGP_NEXTHOP_REGISTERED); | |
221 | UNSET_FLAG(bnc->flags, BGP_NEXTHOP_VALID); | |
222 | } else if (peer && !connected | |
223 | && CHECK_FLAG(bnc->flags, BGP_NEXTHOP_CONNECTED)) { | |
224 | UNSET_FLAG(bnc->flags, BGP_NEXTHOP_CONNECTED); | |
225 | UNSET_FLAG(bnc->flags, BGP_NEXTHOP_REGISTERED); | |
226 | UNSET_FLAG(bnc->flags, BGP_NEXTHOP_VALID); | |
078430f6 | 227 | } |
960035b2 | 228 | if (bgp_route->inst_type == BGP_INSTANCE_TYPE_VIEW) { |
1ee0a2df DS |
229 | SET_FLAG(bnc->flags, BGP_NEXTHOP_REGISTERED); |
230 | SET_FLAG(bnc->flags, BGP_NEXTHOP_VALID); | |
b54892e0 | 231 | } else if (!CHECK_FLAG(bnc->flags, BGP_NEXTHOP_REGISTERED) |
f663c581 | 232 | && !is_default_host_route(&bnc->prefix)) |
d62a17ae | 233 | register_zebra_rnh(bnc, is_bgp_static_route); |
1eb6c3ea | 234 | |
40381db7 | 235 | if (pi && pi->nexthop != bnc) { |
d62a17ae | 236 | /* Unlink from existing nexthop cache, if any. This will also |
237 | * free | |
238 | * the nexthop cache entry, if appropriate. | |
239 | */ | |
40381db7 | 240 | bgp_unlink_nexthop(pi); |
d62a17ae | 241 | |
7f040da1 DS |
242 | /* updates NHT pi list reference */ |
243 | path_nh_map(pi, bnc, true); | |
d62a17ae | 244 | |
245 | if (CHECK_FLAG(bnc->flags, BGP_NEXTHOP_VALID) && bnc->metric) | |
40381db7 DS |
246 | (bgp_path_info_extra_get(pi))->igpmetric = bnc->metric; |
247 | else if (pi->extra) | |
248 | pi->extra->igpmetric = 0; | |
d62a17ae | 249 | } else if (peer) |
250 | bnc->nht_info = (void *)peer; /* NHT peer reference */ | |
251 | ||
252 | /* | |
253 | * We are cheating here. Views have no associated underlying | |
254 | * ability to detect nexthops. So when we have a view | |
255 | * just tell everyone the nexthop is valid | |
256 | */ | |
960035b2 | 257 | if (bgp_route->inst_type == BGP_INSTANCE_TYPE_VIEW) |
d62a17ae | 258 | return 1; |
259 | else | |
260 | return (bgp_isvalid_nexthop(bnc)); | |
fb018d25 DS |
261 | } |
262 | ||
d62a17ae | 263 | void bgp_delete_connected_nexthop(afi_t afi, struct peer *peer) |
9a233a02 | 264 | { |
d62a17ae | 265 | struct bgp_nexthop_cache *bnc; |
266 | struct prefix p; | |
267 | ||
268 | if (!peer) | |
269 | return; | |
270 | ||
d62a17ae | 271 | if (!sockunion2hostprefix(&peer->su, &p)) |
272 | return; | |
273 | ||
f663c581 | 274 | bnc = bnc_find(&peer->bgp->nexthop_cache_table[family2afi(p.family)], |
545aeef1 | 275 | &p, 0); |
14315f2d DS |
276 | if (!bnc) { |
277 | if (BGP_DEBUG(nht, NHT)) | |
8c1a4c10 | 278 | zlog_debug( |
f663c581 | 279 | "Cannot find connected NHT node for peer %s(%s)", |
8c1a4c10 | 280 | peer->host, peer->bgp->name_pretty); |
14315f2d DS |
281 | return; |
282 | } | |
d62a17ae | 283 | |
284 | if (bnc->nht_info != peer) { | |
285 | if (BGP_DEBUG(nht, NHT)) | |
286 | zlog_debug( | |
8c1a4c10 DS |
287 | "Connected NHT %p node for peer %s(%s) points to %p", |
288 | bnc, peer->host, bnc->bgp->name_pretty, | |
289 | bnc->nht_info); | |
d62a17ae | 290 | return; |
291 | } | |
292 | ||
293 | bnc->nht_info = NULL; | |
294 | ||
295 | if (LIST_EMPTY(&(bnc->paths))) { | |
296 | if (BGP_DEBUG(nht, NHT)) | |
8c1a4c10 DS |
297 | zlog_debug( |
298 | "Freeing connected NHT node %p for peer %s(%s)", | |
299 | bnc, peer->host, bnc->bgp->name_pretty); | |
d62a17ae | 300 | unregister_zebra_rnh(bnc, 0); |
d62a17ae | 301 | bnc_free(bnc); |
302 | } | |
9a233a02 DS |
303 | } |
304 | ||
545aeef1 RW |
305 | static void bgp_process_nexthop_update(struct bgp_nexthop_cache *bnc, |
306 | struct zapi_route *nhr) | |
fb018d25 | 307 | { |
d62a17ae | 308 | struct nexthop *nexthop; |
309 | struct nexthop *oldnh; | |
310 | struct nexthop *nhlist_head = NULL; | |
311 | struct nexthop *nhlist_tail = NULL; | |
d62a17ae | 312 | int i; |
14315f2d | 313 | |
d62a17ae | 314 | bnc->last_update = bgp_clock(); |
315 | bnc->change_flags = 0; | |
d62a17ae | 316 | |
317 | /* debug print the input */ | |
2dbe669b | 318 | if (BGP_DEBUG(nht, NHT)) |
d62a17ae | 319 | zlog_debug( |
2dbe669b DA |
320 | "%s(%u): Rcvd NH update %pFX(%u) - metric %d/%d #nhops %d/%d flags 0x%x", |
321 | bnc->bgp->name_pretty, bnc->bgp->vrf_id, &nhr->prefix, | |
545aeef1 RW |
322 | bnc->srte_color, nhr->metric, bnc->metric, |
323 | nhr->nexthop_num, bnc->nexthop_num, bnc->flags); | |
d62a17ae | 324 | |
545aeef1 | 325 | if (nhr->metric != bnc->metric) |
d62a17ae | 326 | bnc->change_flags |= BGP_NEXTHOP_METRIC_CHANGED; |
327 | ||
545aeef1 | 328 | if (nhr->nexthop_num != bnc->nexthop_num) |
d62a17ae | 329 | bnc->change_flags |= BGP_NEXTHOP_CHANGED; |
330 | ||
545aeef1 | 331 | if (nhr->nexthop_num) { |
6137a77d DS |
332 | struct peer *peer = bnc->nht_info; |
333 | ||
d62a17ae | 334 | /* notify bgp fsm if nbr ip goes from invalid->valid */ |
335 | if (!bnc->nexthop_num) | |
336 | UNSET_FLAG(bnc->flags, BGP_NEXTHOP_PEER_NOTIFIED); | |
337 | ||
338 | bnc->flags |= BGP_NEXTHOP_VALID; | |
545aeef1 RW |
339 | bnc->metric = nhr->metric; |
340 | bnc->nexthop_num = nhr->nexthop_num; | |
4a749e2c | 341 | |
960035b2 PZ |
342 | bnc->flags &= ~BGP_NEXTHOP_LABELED_VALID; /* check below */ |
343 | ||
545aeef1 | 344 | for (i = 0; i < nhr->nexthop_num; i++) { |
960035b2 PZ |
345 | int num_labels = 0; |
346 | ||
545aeef1 | 347 | nexthop = nexthop_from_zapi_nexthop(&nhr->nexthops[i]); |
d62a17ae | 348 | |
6137a77d DS |
349 | /* |
350 | * Turn on RA for the v6 nexthops | |
351 | * we receive from bgp. This is to allow us | |
352 | * to work with v4 routing over v6 nexthops | |
353 | */ | |
687a2b5d DS |
354 | if (peer && !peer->ifp |
355 | && CHECK_FLAG(peer->flags, | |
356 | PEER_FLAG_CAPABILITY_ENHE) | |
545aeef1 | 357 | && nhr->prefix.family == AF_INET6 |
65f803e8 | 358 | && nexthop->type != NEXTHOP_TYPE_BLACKHOLE) { |
6137a77d DS |
359 | struct interface *ifp; |
360 | ||
361 | ifp = if_lookup_by_index(nexthop->ifindex, | |
362 | nexthop->vrf_id); | |
8c9769e0 DS |
363 | if (ifp) |
364 | zclient_send_interface_radv_req( | |
365 | zclient, nexthop->vrf_id, ifp, | |
366 | true, | |
367 | BGP_UNNUM_DEFAULT_RA_INTERVAL); | |
6137a77d | 368 | } |
960035b2 PZ |
369 | /* There is at least one label-switched path */ |
370 | if (nexthop->nh_label && | |
371 | nexthop->nh_label->num_labels) { | |
372 | ||
373 | bnc->flags |= BGP_NEXTHOP_LABELED_VALID; | |
374 | num_labels = nexthop->nh_label->num_labels; | |
375 | } | |
376 | ||
d62a17ae | 377 | if (BGP_DEBUG(nht, NHT)) { |
378 | char buf[NEXTHOP_STRLEN]; | |
379 | zlog_debug( | |
960035b2 PZ |
380 | " nhop via %s (%d labels)", |
381 | nexthop2str(nexthop, buf, sizeof(buf)), | |
382 | num_labels); | |
d62a17ae | 383 | } |
384 | ||
385 | if (nhlist_tail) { | |
386 | nhlist_tail->next = nexthop; | |
387 | nhlist_tail = nexthop; | |
388 | } else { | |
389 | nhlist_tail = nexthop; | |
390 | nhlist_head = nexthop; | |
391 | } | |
392 | ||
393 | /* No need to evaluate the nexthop if we have already | |
394 | * determined | |
395 | * that there has been a change. | |
396 | */ | |
397 | if (bnc->change_flags & BGP_NEXTHOP_CHANGED) | |
398 | continue; | |
399 | ||
400 | for (oldnh = bnc->nexthop; oldnh; oldnh = oldnh->next) | |
78fba41b | 401 | if (nexthop_same(oldnh, nexthop)) |
d62a17ae | 402 | break; |
403 | ||
404 | if (!oldnh) | |
405 | bnc->change_flags |= BGP_NEXTHOP_CHANGED; | |
406 | } | |
407 | bnc_nexthop_free(bnc); | |
408 | bnc->nexthop = nhlist_head; | |
409 | } else { | |
410 | bnc->flags &= ~BGP_NEXTHOP_VALID; | |
545aeef1 | 411 | bnc->nexthop_num = nhr->nexthop_num; |
d62a17ae | 412 | |
413 | /* notify bgp fsm if nbr ip goes from valid->invalid */ | |
414 | UNSET_FLAG(bnc->flags, BGP_NEXTHOP_PEER_NOTIFIED); | |
415 | ||
416 | bnc_nexthop_free(bnc); | |
417 | bnc->nexthop = NULL; | |
418 | } | |
419 | ||
420 | evaluate_paths(bnc); | |
fb018d25 DS |
421 | } |
422 | ||
545aeef1 RW |
423 | void bgp_parse_nexthop_update(int command, vrf_id_t vrf_id) |
424 | { | |
425 | struct bgp_nexthop_cache_head *tree = NULL; | |
426 | struct bgp_nexthop_cache *bnc; | |
427 | struct bgp *bgp; | |
428 | struct zapi_route nhr; | |
429 | afi_t afi; | |
430 | ||
431 | bgp = bgp_lookup_by_vrf_id(vrf_id); | |
432 | if (!bgp) { | |
433 | flog_err( | |
434 | EC_BGP_NH_UPD, | |
435 | "parse nexthop update: instance not found for vrf_id %u", | |
436 | vrf_id); | |
437 | return; | |
438 | } | |
439 | ||
440 | if (!zapi_nexthop_update_decode(zclient->ibuf, &nhr)) { | |
6c83dded QY |
441 | zlog_err("%s[%s]: Failure to decode nexthop update", |
442 | __PRETTY_FUNCTION__, bgp->name_pretty); | |
545aeef1 RW |
443 | return; |
444 | } | |
445 | ||
446 | afi = family2afi(nhr.prefix.family); | |
447 | if (command == ZEBRA_NEXTHOP_UPDATE) | |
448 | tree = &bgp->nexthop_cache_table[afi]; | |
449 | else if (command == ZEBRA_IMPORT_CHECK_UPDATE) | |
450 | tree = &bgp->import_check_table[afi]; | |
451 | ||
452 | bnc = bnc_find(tree, &nhr.prefix, nhr.srte_color); | |
453 | if (!bnc) { | |
2dbe669b | 454 | if (BGP_DEBUG(nht, NHT)) |
545aeef1 | 455 | zlog_debug( |
2dbe669b DA |
456 | "parse nexthop update(%pFX(%u)(%s)): bnc info not found", |
457 | &nhr.prefix, nhr.srte_color, bgp->name_pretty); | |
545aeef1 RW |
458 | return; |
459 | } | |
460 | ||
461 | bgp_process_nexthop_update(bnc, &nhr); | |
462 | ||
463 | /* | |
464 | * HACK: if any BGP route is dependant on an SR-policy that doesn't | |
465 | * exist, zebra will never send NH updates relative to that policy. In | |
466 | * that case, whenever we receive an update about a colorless NH, update | |
467 | * the corresponding colorful NHs that share the same endpoint but that | |
468 | * are inactive. This ugly hack should work around the problem at the | |
469 | * cost of a performance pernalty. Long term, what should be done is to | |
470 | * make zebra's RNH subsystem aware of SR-TE colors (like bgpd is), | |
471 | * which should provide a better infrastructure to solve this issue in | |
472 | * a more efficient and elegant way. | |
473 | */ | |
474 | if (nhr.srte_color == 0) { | |
475 | struct bgp_nexthop_cache *bnc_iter; | |
476 | ||
477 | frr_each (bgp_nexthop_cache, &bgp->nexthop_cache_table[afi], | |
478 | bnc_iter) { | |
479 | if (!prefix_same(&bnc->prefix, &bnc_iter->prefix) | |
480 | || bnc_iter->srte_color == 0 | |
481 | || CHECK_FLAG(bnc_iter->flags, BGP_NEXTHOP_VALID)) | |
482 | continue; | |
483 | ||
484 | bgp_process_nexthop_update(bnc_iter, &nhr); | |
485 | } | |
486 | } | |
487 | } | |
488 | ||
ee7ca6c0 | 489 | /* |
490 | * Cleanup nexthop registration and status information for BGP nexthops | |
491 | * pertaining to this VRF. This is invoked upon VRF deletion. | |
492 | */ | |
493 | void bgp_cleanup_nexthops(struct bgp *bgp) | |
494 | { | |
f663c581 RW |
495 | for (afi_t afi = AFI_IP; afi < AFI_MAX; afi++) { |
496 | struct bgp_nexthop_cache *bnc; | |
ee7ca6c0 | 497 | |
f663c581 RW |
498 | frr_each (bgp_nexthop_cache, &bgp->nexthop_cache_table[afi], |
499 | bnc) { | |
ee7ca6c0 | 500 | /* Clear relevant flags. */ |
501 | UNSET_FLAG(bnc->flags, BGP_NEXTHOP_VALID); | |
502 | UNSET_FLAG(bnc->flags, BGP_NEXTHOP_REGISTERED); | |
503 | UNSET_FLAG(bnc->flags, BGP_NEXTHOP_PEER_NOTIFIED); | |
504 | } | |
505 | } | |
506 | } | |
507 | ||
fb018d25 DS |
508 | /** |
509 | * make_prefix - make a prefix structure from the path (essentially | |
510 | * path's node. | |
511 | */ | |
40381db7 | 512 | static int make_prefix(int afi, struct bgp_path_info *pi, struct prefix *p) |
fb018d25 | 513 | { |
078430f6 | 514 | |
40381db7 DS |
515 | int is_bgp_static = ((pi->type == ZEBRA_ROUTE_BGP) |
516 | && (pi->sub_type == BGP_ROUTE_STATIC)) | |
d62a17ae | 517 | ? 1 |
518 | : 0; | |
9bcb3eef DS |
519 | struct bgp_dest *net = pi->net; |
520 | const struct prefix *p_orig = bgp_dest_get_prefix(net); | |
92d6f769 | 521 | struct in_addr ipv4; |
0378bcaa PG |
522 | |
523 | if (p_orig->family == AF_FLOWSPEC) { | |
524 | if (!pi->peer) | |
525 | return -1; | |
526 | return bgp_flowspec_get_first_nh(pi->peer->bgp, | |
1840384b | 527 | pi, p, afi); |
0378bcaa | 528 | } |
d62a17ae | 529 | memset(p, 0, sizeof(struct prefix)); |
530 | switch (afi) { | |
531 | case AFI_IP: | |
532 | p->family = AF_INET; | |
533 | if (is_bgp_static) { | |
b54892e0 DS |
534 | p->u.prefix4 = p_orig->u.prefix4; |
535 | p->prefixlen = p_orig->prefixlen; | |
d62a17ae | 536 | } else { |
92d6f769 K |
537 | if (IS_MAPPED_IPV6(&pi->attr->mp_nexthop_global)) { |
538 | ipv4_mapped_ipv6_to_ipv4( | |
539 | &pi->attr->mp_nexthop_global, &ipv4); | |
540 | p->u.prefix4 = ipv4; | |
541 | p->prefixlen = IPV4_MAX_BITLEN; | |
542 | } else { | |
543 | p->u.prefix4 = pi->attr->nexthop; | |
544 | p->prefixlen = IPV4_MAX_BITLEN; | |
545 | } | |
d62a17ae | 546 | } |
547 | break; | |
548 | case AFI_IP6: | |
d62a17ae | 549 | p->family = AF_INET6; |
550 | ||
551 | if (is_bgp_static) { | |
b54892e0 DS |
552 | p->u.prefix6 = p_orig->u.prefix6; |
553 | p->prefixlen = p_orig->prefixlen; | |
d62a17ae | 554 | } else { |
606fdbb1 DA |
555 | /* If we receive MP_REACH nexthop with ::(LL) |
556 | * or LL(LL), use LL address as nexthop cache. | |
557 | */ | |
558 | if (pi->attr->mp_nexthop_len | |
559 | == BGP_ATTR_NHLEN_IPV6_GLOBAL_AND_LL | |
560 | && (IN6_IS_ADDR_UNSPECIFIED( | |
561 | &pi->attr->mp_nexthop_global) | |
562 | || IN6_IS_ADDR_LINKLOCAL( | |
563 | &pi->attr->mp_nexthop_global))) | |
564 | p->u.prefix6 = pi->attr->mp_nexthop_local; | |
565 | else | |
566 | p->u.prefix6 = pi->attr->mp_nexthop_global; | |
d62a17ae | 567 | p->prefixlen = IPV6_MAX_BITLEN; |
568 | } | |
569 | break; | |
570 | default: | |
571 | if (BGP_DEBUG(nht, NHT)) { | |
572 | zlog_debug( | |
573 | "%s: Attempting to make prefix with unknown AFI %d (not %d or %d)", | |
15569c58 | 574 | __func__, afi, AFI_IP, AFI_IP6); |
d62a17ae | 575 | } |
576 | break; | |
65740e1b | 577 | } |
d62a17ae | 578 | return 0; |
fb018d25 DS |
579 | } |
580 | ||
581 | /** | |
078430f6 | 582 | * sendmsg_zebra_rnh -- Format and send a nexthop register/Unregister |
fb018d25 DS |
583 | * command to Zebra. |
584 | * ARGUMENTS: | |
585 | * struct bgp_nexthop_cache *bnc -- the nexthop structure. | |
078430f6 | 586 | * int command -- command to send to zebra |
fb018d25 DS |
587 | * RETURNS: |
588 | * void. | |
589 | */ | |
d62a17ae | 590 | static void sendmsg_zebra_rnh(struct bgp_nexthop_cache *bnc, int command) |
fb018d25 | 591 | { |
3c192540 | 592 | bool exact_match = false; |
d62a17ae | 593 | int ret; |
594 | ||
3c192540 | 595 | if (!zclient) |
d62a17ae | 596 | return; |
597 | ||
598 | /* Don't try to register if Zebra doesn't know of this instance. */ | |
bb4ef1ae DS |
599 | if (!IS_BGP_INST_KNOWN_TO_ZEBRA(bnc->bgp)) { |
600 | if (BGP_DEBUG(zebra, ZEBRA)) | |
15569c58 DA |
601 | zlog_debug( |
602 | "%s: No zebra instance to talk to, not installing NHT entry", | |
603 | __func__); | |
d62a17ae | 604 | return; |
bb4ef1ae | 605 | } |
d62a17ae | 606 | |
1ee0a2df DS |
607 | if (!bgp_zebra_num_connects()) { |
608 | if (BGP_DEBUG(zebra, ZEBRA)) | |
15569c58 DA |
609 | zlog_debug( |
610 | "%s: We have not connected yet, cannot send nexthops", | |
611 | __func__); | |
1ee0a2df | 612 | } |
996c9314 LB |
613 | if ((command == ZEBRA_NEXTHOP_REGISTER |
614 | || command == ZEBRA_IMPORT_ROUTE_REGISTER) | |
615 | && (CHECK_FLAG(bnc->flags, BGP_NEXTHOP_CONNECTED) | |
616 | || CHECK_FLAG(bnc->flags, BGP_STATIC_ROUTE_EXACT_MATCH))) | |
3c192540 | 617 | exact_match = true; |
d62a17ae | 618 | |
f663c581 RW |
619 | if (BGP_DEBUG(zebra, ZEBRA)) |
620 | zlog_debug("%s: sending cmd %s for %pFX (vrf %s)", __func__, | |
621 | zserv_command_string(command), &bnc->prefix, | |
622 | bnc->bgp->name_pretty); | |
960035b2 | 623 | |
f663c581 | 624 | ret = zclient_send_rnh(zclient, command, &bnc->prefix, exact_match, |
996c9314 | 625 | bnc->bgp->vrf_id); |
d62a17ae | 626 | /* TBD: handle the failure */ |
7cfdb485 | 627 | if (ret == ZCLIENT_SEND_FAILURE) |
e50f7cfd | 628 | flog_warn(EC_BGP_ZEBRA_SEND, |
f162a5b9 | 629 | "sendmsg_nexthop: zclient_send_message() failed"); |
d62a17ae | 630 | |
631 | if ((command == ZEBRA_NEXTHOP_REGISTER) | |
632 | || (command == ZEBRA_IMPORT_ROUTE_REGISTER)) | |
633 | SET_FLAG(bnc->flags, BGP_NEXTHOP_REGISTERED); | |
634 | else if ((command == ZEBRA_NEXTHOP_UNREGISTER) | |
635 | || (command == ZEBRA_IMPORT_ROUTE_UNREGISTER)) | |
636 | UNSET_FLAG(bnc->flags, BGP_NEXTHOP_REGISTERED); | |
637 | return; | |
fb018d25 DS |
638 | } |
639 | ||
640 | /** | |
078430f6 DS |
641 | * register_zebra_rnh - register a NH/route with Zebra for notification |
642 | * when the route or the route to the nexthop changes. | |
fb018d25 | 643 | * ARGUMENTS: |
078430f6 | 644 | * struct bgp_nexthop_cache *bnc |
fb018d25 DS |
645 | * RETURNS: |
646 | * void. | |
647 | */ | |
d62a17ae | 648 | static void register_zebra_rnh(struct bgp_nexthop_cache *bnc, |
649 | int is_bgp_import_route) | |
fb018d25 | 650 | { |
d62a17ae | 651 | /* Check if we have already registered */ |
652 | if (bnc->flags & BGP_NEXTHOP_REGISTERED) | |
653 | return; | |
654 | if (is_bgp_import_route) | |
655 | sendmsg_zebra_rnh(bnc, ZEBRA_IMPORT_ROUTE_REGISTER); | |
656 | else | |
657 | sendmsg_zebra_rnh(bnc, ZEBRA_NEXTHOP_REGISTER); | |
fb018d25 DS |
658 | } |
659 | ||
660 | /** | |
078430f6 | 661 | * unregister_zebra_rnh -- Unregister the route/nexthop from Zebra. |
fb018d25 | 662 | * ARGUMENTS: |
078430f6 | 663 | * struct bgp_nexthop_cache *bnc |
fb018d25 DS |
664 | * RETURNS: |
665 | * void. | |
666 | */ | |
d62a17ae | 667 | static void unregister_zebra_rnh(struct bgp_nexthop_cache *bnc, |
668 | int is_bgp_import_route) | |
fb018d25 | 669 | { |
d62a17ae | 670 | /* Check if we have already registered */ |
671 | if (!CHECK_FLAG(bnc->flags, BGP_NEXTHOP_REGISTERED)) | |
672 | return; | |
673 | ||
674 | if (is_bgp_import_route) | |
675 | sendmsg_zebra_rnh(bnc, ZEBRA_IMPORT_ROUTE_UNREGISTER); | |
676 | else | |
677 | sendmsg_zebra_rnh(bnc, ZEBRA_NEXTHOP_UNREGISTER); | |
fb018d25 DS |
678 | } |
679 | ||
680 | /** | |
681 | * evaluate_paths - Evaluate the paths/nets associated with a nexthop. | |
682 | * ARGUMENTS: | |
683 | * struct bgp_nexthop_cache *bnc -- the nexthop structure. | |
684 | * RETURNS: | |
685 | * void. | |
686 | */ | |
d62a17ae | 687 | static void evaluate_paths(struct bgp_nexthop_cache *bnc) |
fb018d25 | 688 | { |
9bcb3eef | 689 | struct bgp_dest *dest; |
4b7e6066 | 690 | struct bgp_path_info *path; |
d62a17ae | 691 | int afi; |
692 | struct peer *peer = (struct peer *)bnc->nht_info; | |
693 | struct bgp_table *table; | |
694 | safi_t safi; | |
960035b2 | 695 | struct bgp *bgp_path; |
b54892e0 | 696 | const struct prefix *p; |
d62a17ae | 697 | |
698 | if (BGP_DEBUG(nht, NHT)) { | |
699 | char buf[PREFIX2STR_BUFFER]; | |
700 | bnc_str(bnc, buf, PREFIX2STR_BUFFER); | |
701 | zlog_debug( | |
545aeef1 RW |
702 | "NH update for %s(%u)(%s) - flags 0x%x chgflags 0x%x - evaluate paths", |
703 | buf, bnc->srte_color, bnc->bgp->name_pretty, bnc->flags, | |
8c1a4c10 | 704 | bnc->change_flags); |
fb018d25 DS |
705 | } |
706 | ||
a2addae8 | 707 | LIST_FOREACH (path, &(bnc->paths), nh_thread) { |
d62a17ae | 708 | if (!(path->type == ZEBRA_ROUTE_BGP |
709 | && ((path->sub_type == BGP_ROUTE_NORMAL) | |
960035b2 PZ |
710 | || (path->sub_type == BGP_ROUTE_STATIC) |
711 | || (path->sub_type == BGP_ROUTE_IMPORTED)))) | |
d62a17ae | 712 | continue; |
713 | ||
9bcb3eef DS |
714 | dest = path->net; |
715 | assert(dest && bgp_dest_table(dest)); | |
716 | p = bgp_dest_get_prefix(dest); | |
b54892e0 | 717 | afi = family2afi(p->family); |
9bcb3eef | 718 | table = bgp_dest_table(dest); |
d62a17ae | 719 | safi = table->safi; |
720 | ||
960035b2 PZ |
721 | /* |
722 | * handle routes from other VRFs (they can have a | |
723 | * nexthop in THIS VRF). bgp_path is the bgp instance | |
724 | * that owns the route referencing this nexthop. | |
725 | */ | |
726 | bgp_path = table->bgp; | |
727 | ||
728 | /* | |
729 | * Path becomes valid/invalid depending on whether the nexthop | |
d62a17ae | 730 | * reachable/unreachable. |
960035b2 PZ |
731 | * |
732 | * In case of unicast routes that were imported from vpn | |
733 | * and that have labels, they are valid only if there are | |
734 | * nexthops with labels | |
d62a17ae | 735 | */ |
960035b2 | 736 | |
34ea39b6 | 737 | bool bnc_is_valid_nexthop = false; |
738 | bool path_valid = false; | |
960035b2 PZ |
739 | |
740 | if (safi == SAFI_UNICAST && | |
741 | path->sub_type == BGP_ROUTE_IMPORTED && | |
742 | path->extra && | |
743 | path->extra->num_labels) { | |
744 | ||
745 | bnc_is_valid_nexthop = | |
34ea39b6 | 746 | bgp_isvalid_labeled_nexthop(bnc) ? true : false; |
960035b2 | 747 | } else { |
e7cbe5e5 NT |
748 | if (bgp_update_martian_nexthop( |
749 | bnc->bgp, afi, safi, path->type, | |
9bcb3eef | 750 | path->sub_type, path->attr, dest)) { |
e7cbe5e5 NT |
751 | if (BGP_DEBUG(nht, NHT)) |
752 | zlog_debug( | |
56ca3b5b | 753 | "%s: prefix %pBD (vrf %s), ignoring path due to martian or self-next-hop", |
9bcb3eef | 754 | __func__, dest, bgp_path->name); |
e7cbe5e5 NT |
755 | } else |
756 | bnc_is_valid_nexthop = | |
34ea39b6 | 757 | bgp_isvalid_nexthop(bnc) ? true : false; |
960035b2 PZ |
758 | } |
759 | ||
9e15d76a | 760 | if (BGP_DEBUG(nht, NHT)) { |
761 | char buf1[RD_ADDRSTRLEN]; | |
960035b2 | 762 | |
9bcb3eef DS |
763 | if (dest->pdest) { |
764 | prefix_rd2str((struct prefix_rd *)bgp_dest_get_prefix(dest->pdest), | |
9e15d76a | 765 | buf1, sizeof(buf1)); |
766 | zlog_debug( | |
56ca3b5b | 767 | "... eval path %d/%d %pBD RD %s %s flags 0x%x", |
9bcb3eef | 768 | afi, safi, dest, buf1, |
9e15d76a | 769 | bgp_path->name_pretty, path->flags); |
770 | } else | |
771 | zlog_debug( | |
56ca3b5b | 772 | "... eval path %d/%d %pBD %s flags 0x%x", |
9bcb3eef | 773 | afi, safi, dest, bgp_path->name_pretty, |
9e15d76a | 774 | path->flags); |
775 | } | |
d62a17ae | 776 | |
0139efe0 | 777 | /* Skip paths marked for removal or as history. */ |
778 | if (CHECK_FLAG(path->flags, BGP_PATH_REMOVED) | |
779 | || CHECK_FLAG(path->flags, BGP_PATH_HISTORY)) | |
780 | continue; | |
781 | ||
d62a17ae | 782 | /* Copy the metric to the path. Will be used for bestpath |
783 | * computation */ | |
784 | if (bgp_isvalid_nexthop(bnc) && bnc->metric) | |
18ee8310 DS |
785 | (bgp_path_info_extra_get(path))->igpmetric = |
786 | bnc->metric; | |
d62a17ae | 787 | else if (path->extra) |
788 | path->extra->igpmetric = 0; | |
789 | ||
790 | if (CHECK_FLAG(bnc->change_flags, BGP_NEXTHOP_METRIC_CHANGED) | |
545aeef1 RW |
791 | || CHECK_FLAG(bnc->change_flags, BGP_NEXTHOP_CHANGED) |
792 | || path->attr->srte_color != 0) | |
1defdda8 | 793 | SET_FLAG(path->flags, BGP_PATH_IGP_CHANGED); |
d62a17ae | 794 | |
34ea39b6 | 795 | path_valid = !!CHECK_FLAG(path->flags, BGP_PATH_VALID); |
796 | if (path_valid != bnc_is_valid_nexthop) { | |
797 | if (path_valid) { | |
798 | /* No longer valid, clear flag; also for EVPN | |
799 | * routes, unimport from VRFs if needed. | |
800 | */ | |
801 | bgp_aggregate_decrement(bgp_path, p, path, afi, | |
802 | safi); | |
9bcb3eef | 803 | bgp_path_info_unset_flag(dest, path, |
34ea39b6 | 804 | BGP_PATH_VALID); |
805 | if (safi == SAFI_EVPN && | |
9bcb3eef | 806 | bgp_evpn_is_prefix_nht_supported(bgp_dest_get_prefix(dest))) |
34ea39b6 | 807 | bgp_evpn_unimport_route(bgp_path, |
9bcb3eef | 808 | afi, safi, bgp_dest_get_prefix(dest), path); |
34ea39b6 | 809 | } else { |
810 | /* Path becomes valid, set flag; also for EVPN | |
811 | * routes, import from VRFs if needed. | |
812 | */ | |
9bcb3eef | 813 | bgp_path_info_set_flag(dest, path, |
34ea39b6 | 814 | BGP_PATH_VALID); |
815 | bgp_aggregate_increment(bgp_path, p, path, afi, | |
816 | safi); | |
817 | if (safi == SAFI_EVPN && | |
9bcb3eef | 818 | bgp_evpn_is_prefix_nht_supported(bgp_dest_get_prefix(dest))) |
34ea39b6 | 819 | bgp_evpn_import_route(bgp_path, |
9bcb3eef | 820 | afi, safi, bgp_dest_get_prefix(dest), path); |
34ea39b6 | 821 | } |
7c312383 AD |
822 | } |
823 | ||
9bcb3eef | 824 | bgp_process(bgp_path, dest, afi, safi); |
d62a17ae | 825 | } |
fc9a856f | 826 | |
1e91f1d1 DS |
827 | if (peer) { |
828 | int valid_nexthops = bgp_isvalid_nexthop(bnc); | |
829 | ||
830 | if (valid_nexthops) | |
831 | peer->last_reset = PEER_DOWN_WAITING_OPEN; | |
832 | else | |
833 | peer->last_reset = PEER_DOWN_WAITING_NHT; | |
834 | ||
835 | if (!CHECK_FLAG(bnc->flags, BGP_NEXTHOP_PEER_NOTIFIED)) { | |
836 | if (BGP_DEBUG(nht, NHT)) | |
15569c58 DA |
837 | zlog_debug( |
838 | "%s: Updating peer (%s(%s)) status with NHT", | |
839 | __func__, peer->host, | |
840 | peer->bgp->name_pretty); | |
f8dcd38d | 841 | bgp_fsm_nht_update(peer, !!valid_nexthops); |
1e91f1d1 DS |
842 | SET_FLAG(bnc->flags, BGP_NEXTHOP_PEER_NOTIFIED); |
843 | } | |
d62a17ae | 844 | } |
fc9a856f | 845 | |
d62a17ae | 846 | RESET_FLAG(bnc->change_flags); |
fb018d25 DS |
847 | } |
848 | ||
849 | /** | |
850 | * path_nh_map - make or break path-to-nexthop association. | |
851 | * ARGUMENTS: | |
852 | * path - pointer to the path structure | |
853 | * bnc - pointer to the nexthop structure | |
854 | * make - if set, make the association. if unset, just break the existing | |
855 | * association. | |
856 | */ | |
7f040da1 DS |
857 | void path_nh_map(struct bgp_path_info *path, struct bgp_nexthop_cache *bnc, |
858 | bool make) | |
fb018d25 | 859 | { |
d62a17ae | 860 | if (path->nexthop) { |
861 | LIST_REMOVE(path, nh_thread); | |
862 | path->nexthop->path_count--; | |
863 | path->nexthop = NULL; | |
864 | } | |
865 | if (make) { | |
866 | LIST_INSERT_HEAD(&(bnc->paths), path, nh_thread); | |
867 | path->nexthop = bnc; | |
868 | path->nexthop->path_count++; | |
869 | } | |
fb018d25 | 870 | } |
1ee0a2df DS |
871 | |
872 | /* | |
873 | * This function is called to register nexthops to zebra | |
874 | * as that we may have tried to install the nexthops | |
875 | * before we actually have a zebra connection | |
876 | */ | |
877 | void bgp_nht_register_nexthops(struct bgp *bgp) | |
878 | { | |
f663c581 RW |
879 | for (afi_t afi = AFI_IP; afi < AFI_MAX; afi++) { |
880 | struct bgp_nexthop_cache *bnc; | |
1ee0a2df | 881 | |
f663c581 RW |
882 | frr_each (bgp_nexthop_cache, &bgp->nexthop_cache_table[afi], |
883 | bnc) { | |
1ee0a2df DS |
884 | register_zebra_rnh(bnc, 0); |
885 | } | |
886 | } | |
887 | } | |
1ea03b90 | 888 | |
b3a3290e | 889 | void bgp_nht_reg_enhe_cap_intfs(struct peer *peer) |
1ea03b90 DS |
890 | { |
891 | struct bgp *bgp; | |
1ea03b90 DS |
892 | struct bgp_nexthop_cache *bnc; |
893 | struct nexthop *nhop; | |
894 | struct interface *ifp; | |
895 | struct prefix p; | |
896 | ||
897 | if (peer->ifp) | |
898 | return; | |
899 | ||
900 | bgp = peer->bgp; | |
1ea03b90 | 901 | if (!sockunion2hostprefix(&peer->su, &p)) { |
b3a3290e DS |
902 | zlog_warn("%s: Unable to convert sockunion to prefix for %s", |
903 | __func__, peer->host); | |
1ea03b90 DS |
904 | return; |
905 | } | |
906 | ||
907 | if (p.family != AF_INET6) | |
908 | return; | |
1ea03b90 | 909 | |
545aeef1 | 910 | bnc = bnc_find(&bgp->nexthop_cache_table[AFI_IP6], &p, 0); |
1ea03b90 DS |
911 | if (!bnc) |
912 | return; | |
913 | ||
914 | if (peer != bnc->nht_info) | |
915 | return; | |
916 | ||
917 | for (nhop = bnc->nexthop; nhop; nhop = nhop->next) { | |
8c9769e0 DS |
918 | ifp = if_lookup_by_index(nhop->ifindex, nhop->vrf_id); |
919 | ||
920 | if (!ifp) | |
921 | continue; | |
922 | ||
1ea03b90 DS |
923 | zclient_send_interface_radv_req(zclient, |
924 | nhop->vrf_id, | |
925 | ifp, true, | |
926 | BGP_UNNUM_DEFAULT_RA_INTERVAL); | |
927 | } | |
928 | } | |
b3a3290e DS |
929 | |
930 | void bgp_nht_dereg_enhe_cap_intfs(struct peer *peer) | |
931 | { | |
932 | struct bgp *bgp; | |
b3a3290e DS |
933 | struct bgp_nexthop_cache *bnc; |
934 | struct nexthop *nhop; | |
935 | struct interface *ifp; | |
936 | struct prefix p; | |
937 | ||
938 | if (peer->ifp) | |
939 | return; | |
940 | ||
941 | bgp = peer->bgp; | |
942 | ||
b3a3290e DS |
943 | if (!sockunion2hostprefix(&peer->su, &p)) { |
944 | zlog_warn("%s: Unable to convert sockunion to prefix for %s", | |
945 | __func__, peer->host); | |
946 | return; | |
947 | } | |
948 | ||
949 | if (p.family != AF_INET6) | |
950 | return; | |
951 | ||
545aeef1 | 952 | bnc = bnc_find(&bgp->nexthop_cache_table[AFI_IP6], &p, 0); |
b3a3290e DS |
953 | if (!bnc) |
954 | return; | |
955 | ||
956 | if (peer != bnc->nht_info) | |
957 | return; | |
958 | ||
959 | for (nhop = bnc->nexthop; nhop; nhop = nhop->next) { | |
960 | ifp = if_lookup_by_index(nhop->ifindex, nhop->vrf_id); | |
961 | ||
68cecc3b DS |
962 | if (!ifp) |
963 | continue; | |
964 | ||
b3a3290e DS |
965 | zclient_send_interface_radv_req(zclient, nhop->vrf_id, ifp, 0, |
966 | 0); | |
967 | } | |
968 | } |