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fb018d25 DS |
1 | /* Zebra next hop tracking code |
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 "prefix.h" | |
24 | #include "table.h" | |
25 | #include "memory.h" | |
fb018d25 DS |
26 | #include "command.h" |
27 | #include "if.h" | |
28 | #include "log.h" | |
29 | #include "sockunion.h" | |
30 | #include "linklist.h" | |
31 | #include "thread.h" | |
32 | #include "workqueue.h" | |
33 | #include "prefix.h" | |
34 | #include "routemap.h" | |
35 | #include "stream.h" | |
36 | #include "nexthop.h" | |
b72ede27 | 37 | #include "vrf.h" |
fb018d25 DS |
38 | |
39 | #include "zebra/rib.h" | |
40 | #include "zebra/rt.h" | |
41 | #include "zebra/zserv.h" | |
fe18ee2d | 42 | #include "zebra/zebra_ns.h" |
7c551956 | 43 | #include "zebra/zebra_vrf.h" |
fb018d25 DS |
44 | #include "zebra/redistribute.h" |
45 | #include "zebra/debug.h" | |
46 | #include "zebra/zebra_rnh.h" | |
8902474b | 47 | #include "zebra/zebra_routemap.h" |
a815b788 | 48 | #include "zebra/interface.h" |
4a1ab8e4 | 49 | #include "zebra/zebra_memory.h" |
43e52561 | 50 | #include "zebra/zebra_errors.h" |
fb018d25 | 51 | |
d62a17ae | 52 | static void free_state(vrf_id_t vrf_id, struct route_entry *re, |
53 | struct route_node *rn); | |
f0f77c9a | 54 | static void copy_state(struct rnh *rnh, struct route_entry *re, |
078430f6 | 55 | struct route_node *rn); |
d62a17ae | 56 | #define lookup_rnh_table(v, f) \ |
57 | ({ \ | |
58 | struct zebra_vrf *zvrf; \ | |
59 | struct route_table *t = NULL; \ | |
60 | zvrf = zebra_vrf_lookup_by_id(v); \ | |
61 | if (zvrf) \ | |
62 | t = zvrf->rnh_table[family2afi(f)]; \ | |
63 | t; \ | |
64 | }) | |
b72ede27 | 65 | |
f0f77c9a | 66 | static int compare_state(struct route_entry *r1, struct route_entry *r2); |
7076bb2f | 67 | static int send_client(struct rnh *rnh, struct zserv *client, rnh_type_t type, |
d62a17ae | 68 | vrf_id_t vrf_id); |
fb018d25 | 69 | static void print_rnh(struct route_node *rn, struct vty *vty); |
453844ab | 70 | static int zebra_client_cleanup_rnh(struct zserv *client); |
fb018d25 | 71 | |
a50b580a DS |
72 | int zebra_rnh_ip_default_route = 0; |
73 | int zebra_rnh_ipv6_default_route = 0; | |
74 | ||
453844ab QY |
75 | void zebra_rnh_init(void) |
76 | { | |
21ccc0cf | 77 | hook_register(zserv_client_close, zebra_client_cleanup_rnh); |
453844ab QY |
78 | } |
79 | ||
b72ede27 | 80 | static inline struct route_table *get_rnh_table(vrf_id_t vrfid, int family, |
078430f6 DS |
81 | rnh_type_t type) |
82 | { | |
d62a17ae | 83 | struct zebra_vrf *zvrf; |
84 | struct route_table *t = NULL; | |
85 | ||
86 | zvrf = zebra_vrf_lookup_by_id(vrfid); | |
87 | if (zvrf) | |
88 | switch (type) { | |
89 | case RNH_NEXTHOP_TYPE: | |
90 | t = zvrf->rnh_table[family2afi(family)]; | |
91 | break; | |
92 | case RNH_IMPORT_CHECK_TYPE: | |
93 | t = zvrf->import_check_table[family2afi(family)]; | |
94 | break; | |
95 | } | |
96 | ||
97 | return t; | |
078430f6 DS |
98 | } |
99 | ||
d62a17ae | 100 | char *rnh_str(struct rnh *rnh, char *buf, int size) |
fb018d25 | 101 | { |
d62a17ae | 102 | prefix2str(&(rnh->node->p), buf, size); |
103 | return buf; | |
fb018d25 DS |
104 | } |
105 | ||
1d30d1f4 DS |
106 | struct rnh *zebra_add_rnh(struct prefix *p, vrf_id_t vrfid, rnh_type_t type, |
107 | bool *exists) | |
fb018d25 | 108 | { |
d62a17ae | 109 | struct route_table *table; |
110 | struct route_node *rn; | |
111 | struct rnh *rnh = NULL; | |
112 | char buf[PREFIX2STR_BUFFER]; | |
113 | ||
114 | if (IS_ZEBRA_DEBUG_NHT) { | |
115 | prefix2str(p, buf, sizeof(buf)); | |
116 | zlog_debug("%u: Add RNH %s type %d", vrfid, buf, type); | |
117 | } | |
118 | table = get_rnh_table(vrfid, PREFIX_FAMILY(p), type); | |
119 | if (!table) { | |
120 | prefix2str(p, buf, sizeof(buf)); | |
e914ccbe | 121 | flog_warn(EC_ZEBRA_RNH_NO_TABLE, |
9df414fe | 122 | "%u: Add RNH %s type %d - table not found", vrfid, |
d62a17ae | 123 | buf, type); |
1d30d1f4 | 124 | exists = false; |
d62a17ae | 125 | return NULL; |
126 | } | |
127 | ||
128 | /* Make it sure prefixlen is applied to the prefix. */ | |
129 | apply_mask(p); | |
130 | ||
131 | /* Lookup (or add) route node.*/ | |
132 | rn = route_node_get(table, p); | |
133 | ||
134 | if (!rn->info) { | |
135 | rnh = XCALLOC(MTYPE_RNH, sizeof(struct rnh)); | |
136 | rnh->client_list = list_new(); | |
137 | rnh->vrf_id = vrfid; | |
731a75fe | 138 | rnh->zebra_pseudowire_list = list_new(); |
d62a17ae | 139 | route_lock_node(rn); |
140 | rn->info = rnh; | |
141 | rnh->node = rn; | |
1d30d1f4 DS |
142 | *exists = false; |
143 | } else | |
144 | *exists = true; | |
d62a17ae | 145 | |
146 | route_unlock_node(rn); | |
147 | return (rn->info); | |
fb018d25 DS |
148 | } |
149 | ||
d62a17ae | 150 | struct rnh *zebra_lookup_rnh(struct prefix *p, vrf_id_t vrfid, rnh_type_t type) |
fb018d25 | 151 | { |
d62a17ae | 152 | struct route_table *table; |
153 | struct route_node *rn; | |
fb018d25 | 154 | |
d62a17ae | 155 | table = get_rnh_table(vrfid, PREFIX_FAMILY(p), type); |
156 | if (!table) | |
157 | return NULL; | |
fb018d25 | 158 | |
d62a17ae | 159 | /* Make it sure prefixlen is applied to the prefix. */ |
160 | apply_mask(p); | |
fb018d25 | 161 | |
d62a17ae | 162 | /* Lookup route node.*/ |
163 | rn = route_node_lookup(table, p); | |
164 | if (!rn) | |
165 | return NULL; | |
fb018d25 | 166 | |
d62a17ae | 167 | route_unlock_node(rn); |
168 | return (rn->info); | |
fb018d25 DS |
169 | } |
170 | ||
d62a17ae | 171 | void zebra_free_rnh(struct rnh *rnh) |
5a8dfcd8 | 172 | { |
d62a17ae | 173 | rnh->flags |= ZEBRA_NHT_DELETED; |
6a154c88 DL |
174 | list_delete(&rnh->client_list); |
175 | list_delete(&rnh->zebra_pseudowire_list); | |
d62a17ae | 176 | free_state(rnh->vrf_id, rnh->state, rnh->node); |
177 | XFREE(MTYPE_RNH, rnh); | |
5a8dfcd8 RW |
178 | } |
179 | ||
d62a17ae | 180 | void zebra_delete_rnh(struct rnh *rnh, rnh_type_t type) |
fb018d25 | 181 | { |
d62a17ae | 182 | struct route_node *rn; |
fb018d25 | 183 | |
d62a17ae | 184 | if (!rnh || (rnh->flags & ZEBRA_NHT_DELETED) || !(rn = rnh->node)) |
185 | return; | |
fb018d25 | 186 | |
d62a17ae | 187 | if (IS_ZEBRA_DEBUG_NHT) { |
188 | char buf[PREFIX2STR_BUFFER]; | |
189 | zlog_debug("%u: Del RNH %s type %d", rnh->vrf_id, | |
190 | rnh_str(rnh, buf, sizeof(buf)), type); | |
191 | } | |
fb018d25 | 192 | |
d62a17ae | 193 | zebra_free_rnh(rnh); |
194 | rn->info = NULL; | |
195 | route_unlock_node(rn); | |
fb018d25 DS |
196 | } |
197 | ||
1d30d1f4 DS |
198 | /* |
199 | * This code will send to the registering client | |
200 | * the looked up rnh. | |
201 | * For a rnh that was created, there is no data | |
202 | * so it will send an empty nexthop group | |
203 | * If rnh exists then we know it has been evaluated | |
204 | * and as such it will have a resolved rnh. | |
205 | */ | |
d62a17ae | 206 | void zebra_add_rnh_client(struct rnh *rnh, struct zserv *client, |
207 | rnh_type_t type, vrf_id_t vrf_id) | |
fb018d25 | 208 | { |
d62a17ae | 209 | if (IS_ZEBRA_DEBUG_NHT) { |
210 | char buf[PREFIX2STR_BUFFER]; | |
211 | zlog_debug("%u: Client %s registers for RNH %s type %d", vrf_id, | |
212 | zebra_route_string(client->proto), | |
213 | rnh_str(rnh, buf, sizeof(buf)), type); | |
214 | } | |
215 | if (!listnode_lookup(rnh->client_list, client)) { | |
216 | listnode_add(rnh->client_list, client); | |
1d30d1f4 | 217 | send_client(rnh, client, type, vrf_id); |
d62a17ae | 218 | } |
fb018d25 DS |
219 | } |
220 | ||
d62a17ae | 221 | void zebra_remove_rnh_client(struct rnh *rnh, struct zserv *client, |
222 | rnh_type_t type) | |
fb018d25 | 223 | { |
d62a17ae | 224 | if (IS_ZEBRA_DEBUG_NHT) { |
225 | char buf[PREFIX2STR_BUFFER]; | |
226 | zlog_debug("Client %s unregisters for RNH %s type %d", | |
227 | zebra_route_string(client->proto), | |
228 | rnh_str(rnh, buf, sizeof(buf)), type); | |
229 | } | |
230 | listnode_delete(rnh->client_list, client); | |
231 | if (list_isempty(rnh->client_list) | |
731a75fe | 232 | && list_isempty(rnh->zebra_pseudowire_list)) |
d62a17ae | 233 | zebra_delete_rnh(rnh, type); |
6e26278c DS |
234 | } |
235 | ||
731a75fe RW |
236 | /* XXX move this utility function elsewhere? */ |
237 | static void addr2hostprefix(int af, const union g_addr *addr, | |
238 | struct prefix *prefix) | |
239 | { | |
240 | switch (af) { | |
241 | case AF_INET: | |
242 | prefix->family = AF_INET; | |
243 | prefix->prefixlen = IPV4_MAX_BITLEN; | |
244 | prefix->u.prefix4 = addr->ipv4; | |
245 | break; | |
246 | case AF_INET6: | |
247 | prefix->family = AF_INET6; | |
248 | prefix->prefixlen = IPV6_MAX_BITLEN; | |
249 | prefix->u.prefix6 = addr->ipv6; | |
250 | break; | |
251 | default: | |
c31a793b | 252 | memset(prefix, 0, sizeof(*prefix)); |
9df414fe | 253 | zlog_debug("%s: unknown address family %d", __func__, af); |
731a75fe RW |
254 | break; |
255 | } | |
256 | } | |
257 | ||
258 | void zebra_register_rnh_pseudowire(vrf_id_t vrf_id, struct zebra_pw *pw) | |
259 | { | |
260 | struct prefix nh; | |
261 | struct rnh *rnh; | |
1d30d1f4 | 262 | bool exists; |
6d53d7b1 | 263 | struct zebra_vrf *zvrf; |
264 | ||
265 | zvrf = vrf_info_lookup(vrf_id); | |
266 | if (!zvrf) | |
267 | return; | |
731a75fe RW |
268 | |
269 | addr2hostprefix(pw->af, &pw->nexthop, &nh); | |
1d30d1f4 | 270 | rnh = zebra_add_rnh(&nh, vrf_id, RNH_NEXTHOP_TYPE, &exists); |
731a75fe RW |
271 | if (rnh && !listnode_lookup(rnh->zebra_pseudowire_list, pw)) { |
272 | listnode_add(rnh->zebra_pseudowire_list, pw); | |
273 | pw->rnh = rnh; | |
6d53d7b1 | 274 | zebra_evaluate_rnh(zvrf, pw->af, 1, RNH_NEXTHOP_TYPE, &nh); |
731a75fe RW |
275 | } |
276 | } | |
277 | ||
278 | void zebra_deregister_rnh_pseudowire(vrf_id_t vrf_id, struct zebra_pw *pw) | |
279 | { | |
280 | struct rnh *rnh; | |
281 | ||
282 | rnh = pw->rnh; | |
283 | if (!rnh) | |
284 | return; | |
285 | ||
286 | listnode_delete(rnh->zebra_pseudowire_list, pw); | |
287 | pw->rnh = NULL; | |
288 | ||
289 | if (list_isempty(rnh->client_list) | |
731a75fe RW |
290 | && list_isempty(rnh->zebra_pseudowire_list)) |
291 | zebra_delete_rnh(rnh, RNH_NEXTHOP_TYPE); | |
292 | } | |
293 | ||
d50b5bdd | 294 | /* Apply the NHT route-map for a client to the route (and nexthops) |
295 | * resolving a NH. | |
296 | */ | |
6d53d7b1 | 297 | static int zebra_rnh_apply_nht_rmap(int family, struct zebra_vrf *zvrf, |
298 | struct route_node *prn, | |
d62a17ae | 299 | struct route_entry *re, int proto) |
6e26278c | 300 | { |
d62a17ae | 301 | int at_least_one = 0; |
302 | int rmap_family; /* Route map has diff AF family enum */ | |
303 | struct nexthop *nexthop; | |
304 | int ret; | |
305 | ||
306 | rmap_family = (family == AF_INET) ? AFI_IP : AFI_IP6; | |
307 | ||
308 | if (prn && re) { | |
7ee30f28 DS |
309 | for (nexthop = re->ng.nexthop; nexthop; |
310 | nexthop = nexthop->next) { | |
ac6eebce | 311 | ret = zebra_nht_route_map_check( |
312 | rmap_family, proto, &prn->p, zvrf, re, nexthop); | |
d62a17ae | 313 | if (ret != RMAP_DENYMATCH) { |
314 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
315 | at_least_one++; /* at least one valid NH */ | |
316 | } else { | |
317 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
318 | } | |
319 | } | |
6e26278c | 320 | } |
d62a17ae | 321 | return (at_least_one); |
6e26278c DS |
322 | } |
323 | ||
d50b5bdd | 324 | /* |
fd7fd9e5 DS |
325 | * Determine appropriate route (RE entry) resolving a tracked BGP route |
326 | * for BGP route for import. | |
d50b5bdd | 327 | */ |
996c9314 | 328 | static struct route_entry * |
6d53d7b1 | 329 | zebra_rnh_resolve_import_entry(struct zebra_vrf *zvrf, int family, |
996c9314 LB |
330 | struct route_node *nrn, struct rnh *rnh, |
331 | struct route_node **prn) | |
fb018d25 | 332 | { |
d62a17ae | 333 | struct route_table *route_table; |
334 | struct route_node *rn; | |
335 | struct route_entry *re; | |
336 | ||
337 | *prn = NULL; | |
338 | ||
6d53d7b1 | 339 | route_table = zvrf->table[family2afi(family)][SAFI_UNICAST]; |
d62a17ae | 340 | if (!route_table) // unexpected |
341 | return NULL; | |
342 | ||
343 | rn = route_node_match(route_table, &nrn->p); | |
344 | if (!rn) | |
345 | return NULL; | |
346 | ||
fd7fd9e5 DS |
347 | /* Unlock route node - we don't need to lock when walking the tree. */ |
348 | route_unlock_node(rn); | |
349 | ||
996c9314 LB |
350 | if (CHECK_FLAG(rnh->flags, ZEBRA_NHT_EXACT_MATCH) |
351 | && !prefix_same(&nrn->p, &rn->p)) | |
fd7fd9e5 | 352 | return NULL; |
d62a17ae | 353 | |
fd7fd9e5 | 354 | /* Identify appropriate route entry. */ |
996c9314 LB |
355 | RNODE_FOREACH_RE (rn, re) { |
356 | if (!CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED) | |
357 | && CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED) | |
358 | && (re->type != ZEBRA_ROUTE_BGP)) | |
fd7fd9e5 | 359 | break; |
d62a17ae | 360 | } |
361 | ||
d62a17ae | 362 | if (re) |
363 | *prn = rn; | |
364 | return re; | |
d50b5bdd | 365 | } |
366 | ||
367 | /* | |
368 | * See if a tracked route entry for import (by BGP) has undergone any | |
369 | * change, and if so, notify the client. | |
370 | */ | |
d62a17ae | 371 | static void zebra_rnh_eval_import_check_entry(vrf_id_t vrfid, int family, |
372 | int force, struct route_node *nrn, | |
373 | struct rnh *rnh, | |
374 | struct route_entry *re) | |
d50b5bdd | 375 | { |
d62a17ae | 376 | int state_changed = 0; |
377 | struct zserv *client; | |
378 | char bufn[INET6_ADDRSTRLEN]; | |
379 | struct listnode *node; | |
380 | struct nexthop *nexthop; | |
381 | ||
382 | if (re && (rnh->state == NULL)) { | |
7ee30f28 | 383 | for (ALL_NEXTHOPS(re->ng, nexthop)) |
d62a17ae | 384 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) { |
385 | state_changed = 1; | |
386 | break; | |
387 | } | |
388 | } else if (!re && (rnh->state != NULL)) | |
389 | state_changed = 1; | |
390 | ||
391 | if (compare_state(re, rnh->state)) | |
392 | copy_state(rnh, re, nrn); | |
393 | ||
394 | if (state_changed || force) { | |
395 | if (IS_ZEBRA_DEBUG_NHT) { | |
396 | prefix2str(&nrn->p, bufn, INET6_ADDRSTRLEN); | |
397 | zlog_debug("%u:%s: Route import check %s %s\n", vrfid, | |
398 | bufn, rnh->state ? "passed" : "failed", | |
399 | state_changed ? "(state changed)" : ""); | |
400 | } | |
401 | /* state changed, notify clients */ | |
402 | for (ALL_LIST_ELEMENTS_RO(rnh->client_list, node, client)) { | |
403 | send_client(rnh, client, RNH_IMPORT_CHECK_TYPE, vrfid); | |
404 | } | |
405 | } | |
d50b5bdd | 406 | } |
fb018d25 | 407 | |
d50b5bdd | 408 | /* |
409 | * Notify clients registered for this nexthop about a change. | |
410 | */ | |
6d53d7b1 | 411 | static void zebra_rnh_notify_protocol_clients( |
412 | struct zebra_vrf *zvrf, int family, struct route_node *nrn, | |
413 | struct rnh *rnh, struct route_node *prn, struct route_entry *re) | |
d50b5bdd | 414 | { |
d62a17ae | 415 | struct listnode *node; |
416 | struct zserv *client; | |
417 | char bufn[INET6_ADDRSTRLEN]; | |
418 | char bufp[INET6_ADDRSTRLEN]; | |
419 | int num_resolving_nh; | |
420 | ||
421 | if (IS_ZEBRA_DEBUG_NHT) { | |
422 | prefix2str(&nrn->p, bufn, INET6_ADDRSTRLEN); | |
423 | if (prn && re) { | |
424 | prefix2str(&prn->p, bufp, INET6_ADDRSTRLEN); | |
6d53d7b1 | 425 | zlog_debug("%u:%s: NH resolved over route %s", |
426 | zvrf->vrf->vrf_id, bufn, bufp); | |
d62a17ae | 427 | } else |
6d53d7b1 | 428 | zlog_debug("%u:%s: NH has become unresolved", |
429 | zvrf->vrf->vrf_id, bufn); | |
d62a17ae | 430 | } |
431 | ||
432 | for (ALL_LIST_ELEMENTS_RO(rnh->client_list, node, client)) { | |
433 | if (prn && re) { | |
434 | /* Apply route-map for this client to route resolving | |
435 | * this | |
436 | * nexthop to see if it is filtered or not. | |
437 | */ | |
438 | num_resolving_nh = zebra_rnh_apply_nht_rmap( | |
6d53d7b1 | 439 | family, zvrf, prn, re, client->proto); |
d62a17ae | 440 | if (num_resolving_nh) |
441 | rnh->filtered[client->proto] = 0; | |
442 | else | |
443 | rnh->filtered[client->proto] = 1; | |
444 | ||
445 | if (IS_ZEBRA_DEBUG_NHT) | |
446 | zlog_debug( | |
447 | "%u:%s: Notifying client %s about NH %s", | |
6d53d7b1 | 448 | zvrf->vrf->vrf_id, bufn, |
d62a17ae | 449 | zebra_route_string(client->proto), |
450 | num_resolving_nh | |
451 | ? "" | |
452 | : "(filtered by route-map)"); | |
453 | } else { | |
454 | rnh->filtered[client->proto] = 0; | |
455 | if (IS_ZEBRA_DEBUG_NHT) | |
456 | zlog_debug( | |
457 | "%u:%s: Notifying client %s about NH (unreachable)", | |
6d53d7b1 | 458 | zvrf->vrf->vrf_id, bufn, |
d62a17ae | 459 | zebra_route_string(client->proto)); |
460 | } | |
461 | ||
6d53d7b1 | 462 | send_client(rnh, client, RNH_NEXTHOP_TYPE, zvrf->vrf->vrf_id); |
d62a17ae | 463 | } |
d50b5bdd | 464 | } |
078430f6 | 465 | |
d61d5d88 DS |
466 | static void zebra_rnh_process_pbr_tables(int family, |
467 | struct route_node *nrn, | |
468 | struct rnh *rnh, | |
469 | struct route_node *prn, | |
470 | struct route_entry *re) | |
471 | { | |
472 | struct zebra_ns_table *znst; | |
473 | struct route_entry *o_re; | |
474 | struct route_node *o_rn; | |
475 | struct listnode *node; | |
476 | struct zserv *client; | |
477 | struct zebra_ns *zns; | |
478 | afi_t afi = AFI_IP; | |
479 | ||
480 | if (family == AF_INET6) | |
481 | afi = AFI_IP6; | |
482 | ||
483 | /* | |
484 | * We are only concerned about nexthops that change for | |
485 | * anyone using PBR | |
486 | */ | |
487 | for (ALL_LIST_ELEMENTS_RO(rnh->client_list, node, client)) { | |
488 | if (client->proto == ZEBRA_ROUTE_PBR) | |
489 | break; | |
490 | } | |
491 | ||
492 | if (!client) | |
493 | return; | |
494 | ||
495 | zns = zebra_ns_lookup(NS_DEFAULT); | |
496 | RB_FOREACH (znst, zebra_ns_table_head, &zns->ns_tables) { | |
497 | if (afi != znst->afi) | |
498 | continue; | |
499 | ||
500 | for (o_rn = route_top(znst->table); | |
501 | o_rn; o_rn = srcdest_route_next(o_rn)) { | |
502 | RNODE_FOREACH_RE (o_rn, o_re) { | |
503 | if (o_re->type == ZEBRA_ROUTE_PBR) | |
504 | break; | |
505 | ||
506 | } | |
507 | ||
508 | /* | |
509 | * If we have a PBR route and a nexthop changes | |
510 | * just rethink it. Yes this is a hammer, but | |
511 | * a small one | |
512 | */ | |
4d96fd9f DS |
513 | if (o_re) { |
514 | SET_FLAG(o_re->status, ROUTE_ENTRY_CHANGED); | |
d61d5d88 | 515 | rib_queue_add(o_rn); |
4d96fd9f | 516 | } |
d61d5d88 DS |
517 | } |
518 | } | |
519 | } | |
520 | ||
fd7fd9e5 DS |
521 | /* |
522 | * Determine appropriate route (route entry) resolving a tracked | |
523 | * nexthop. | |
524 | */ | |
996c9314 | 525 | static struct route_entry * |
6d53d7b1 | 526 | zebra_rnh_resolve_nexthop_entry(struct zebra_vrf *zvrf, int family, |
996c9314 LB |
527 | struct route_node *nrn, struct rnh *rnh, |
528 | struct route_node **prn) | |
fd7fd9e5 DS |
529 | { |
530 | struct route_table *route_table; | |
531 | struct route_node *rn; | |
532 | struct route_entry *re; | |
533 | ||
534 | *prn = NULL; | |
535 | ||
6d53d7b1 | 536 | route_table = zvrf->table[family2afi(family)][SAFI_UNICAST]; |
fd7fd9e5 DS |
537 | if (!route_table) |
538 | return NULL; | |
539 | ||
540 | rn = route_node_match(route_table, &nrn->p); | |
541 | if (!rn) | |
542 | return NULL; | |
543 | ||
544 | /* Unlock route node - we don't need to lock when walking the tree. */ | |
545 | route_unlock_node(rn); | |
546 | ||
547 | /* While resolving nexthops, we may need to walk up the tree from the | |
548 | * most-specific match. Do similar logic as in zebra_rib.c | |
549 | */ | |
550 | while (rn) { | |
551 | /* Do not resolve over default route unless allowed && | |
552 | * match route to be exact if so specified | |
553 | */ | |
996c9314 LB |
554 | if (is_default_prefix(&rn->p) |
555 | && !rnh_resolve_via_default(rn->p.family)) | |
fd7fd9e5 DS |
556 | return NULL; |
557 | ||
558 | /* Identify appropriate route entry. */ | |
996c9314 | 559 | RNODE_FOREACH_RE (rn, re) { |
fd7fd9e5 DS |
560 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) |
561 | continue; | |
562 | if (!CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED)) | |
563 | continue; | |
564 | ||
565 | if (CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED)) { | |
566 | if ((re->type == ZEBRA_ROUTE_CONNECT) | |
567 | || (re->type == ZEBRA_ROUTE_STATIC)) | |
568 | break; | |
569 | if (re->type == ZEBRA_ROUTE_NHRP) { | |
570 | struct nexthop *nexthop; | |
571 | ||
7ee30f28 | 572 | for (nexthop = re->ng.nexthop; nexthop; |
fd7fd9e5 DS |
573 | nexthop = nexthop->next) |
574 | if (nexthop->type | |
996c9314 | 575 | == NEXTHOP_TYPE_IFINDEX) |
fd7fd9e5 DS |
576 | break; |
577 | if (nexthop) | |
578 | break; | |
579 | } | |
580 | } else | |
581 | break; | |
582 | } | |
583 | ||
584 | /* Route entry found, we're done; else, walk up the tree. */ | |
585 | if (re) { | |
586 | *prn = rn; | |
587 | return re; | |
588 | } | |
589 | ||
590 | if (CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED)) | |
591 | rn = rn->parent; | |
592 | else | |
593 | return NULL; | |
594 | } | |
595 | ||
596 | return NULL; | |
597 | } | |
598 | ||
731a75fe RW |
599 | static void zebra_rnh_process_pseudowires(vrf_id_t vrfid, struct rnh *rnh) |
600 | { | |
601 | struct zebra_pw *pw; | |
602 | struct listnode *node; | |
603 | ||
604 | for (ALL_LIST_ELEMENTS_RO(rnh->zebra_pseudowire_list, node, pw)) | |
605 | zebra_pw_update(pw); | |
606 | } | |
607 | ||
d50b5bdd | 608 | /* |
609 | * See if a tracked nexthop entry has undergone any change, and if so, | |
610 | * take appropriate action; this involves notifying any clients and/or | |
611 | * scheduling dependent static routes for processing. | |
612 | */ | |
6d53d7b1 | 613 | static void zebra_rnh_eval_nexthop_entry(struct zebra_vrf *zvrf, int family, |
614 | int force, struct route_node *nrn, | |
d62a17ae | 615 | struct rnh *rnh, |
616 | struct route_node *prn, | |
617 | struct route_entry *re) | |
d50b5bdd | 618 | { |
d62a17ae | 619 | int state_changed = 0; |
620 | ||
621 | /* If we're resolving over a different route, resolution has changed or | |
622 | * the resolving route has some change (e.g., metric), there is a state | |
623 | * change. | |
624 | */ | |
625 | if (!prefix_same(&rnh->resolved_route, &prn->p)) { | |
626 | if (prn) | |
627 | prefix_copy(&rnh->resolved_route, &prn->p); | |
628 | else | |
629 | memset(&rnh->resolved_route, 0, sizeof(struct prefix)); | |
630 | ||
631 | copy_state(rnh, re, nrn); | |
632 | state_changed = 1; | |
633 | } else if (compare_state(re, rnh->state)) { | |
634 | copy_state(rnh, re, nrn); | |
635 | state_changed = 1; | |
636 | } | |
637 | ||
638 | if (state_changed || force) { | |
639 | /* NOTE: Use the "copy" of resolving route stored in 'rnh' i.e., | |
640 | * rnh->state. | |
641 | */ | |
642 | /* Notify registered protocol clients. */ | |
6d53d7b1 | 643 | zebra_rnh_notify_protocol_clients(zvrf, family, nrn, rnh, prn, |
d62a17ae | 644 | rnh->state); |
645 | ||
6d53d7b1 | 646 | zebra_rnh_process_pbr_tables(family, nrn, rnh, prn, rnh->state); |
d61d5d88 | 647 | |
731a75fe | 648 | /* Process pseudowires attached to this nexthop */ |
6d53d7b1 | 649 | zebra_rnh_process_pseudowires(zvrf->vrf->vrf_id, rnh); |
d62a17ae | 650 | } |
d50b5bdd | 651 | } |
6e26278c | 652 | |
d50b5bdd | 653 | /* Evaluate one tracked entry */ |
6d53d7b1 | 654 | static void zebra_rnh_evaluate_entry(struct zebra_vrf *zvrf, int family, |
655 | int force, rnh_type_t type, | |
656 | struct route_node *nrn) | |
d50b5bdd | 657 | { |
d62a17ae | 658 | struct rnh *rnh; |
659 | struct route_entry *re; | |
660 | struct route_node *prn; | |
661 | char bufn[INET6_ADDRSTRLEN]; | |
662 | ||
663 | if (IS_ZEBRA_DEBUG_NHT) { | |
664 | prefix2str(&nrn->p, bufn, INET6_ADDRSTRLEN); | |
6d53d7b1 | 665 | zlog_debug("%u:%s: Evaluate RNH, type %d %s", zvrf->vrf->vrf_id, |
666 | bufn, type, force ? "(force)" : ""); | |
d62a17ae | 667 | } |
668 | ||
669 | rnh = nrn->info; | |
670 | ||
671 | /* Identify route entry (RE) resolving this tracked entry. */ | |
fd7fd9e5 | 672 | if (type == RNH_IMPORT_CHECK_TYPE) |
6d53d7b1 | 673 | re = zebra_rnh_resolve_import_entry(zvrf, family, nrn, rnh, |
996c9314 | 674 | &prn); |
fd7fd9e5 | 675 | else |
6d53d7b1 | 676 | re = zebra_rnh_resolve_nexthop_entry(zvrf, family, nrn, rnh, |
fd7fd9e5 | 677 | &prn); |
d62a17ae | 678 | |
679 | /* If the entry cannot be resolved and that is also the existing state, | |
680 | * there is nothing further to do. | |
681 | */ | |
682 | if (!re && rnh->state == NULL && !force) | |
683 | return; | |
684 | ||
685 | /* Process based on type of entry. */ | |
686 | if (type == RNH_IMPORT_CHECK_TYPE) | |
6d53d7b1 | 687 | zebra_rnh_eval_import_check_entry(zvrf->vrf->vrf_id, family, |
688 | force, nrn, rnh, re); | |
d62a17ae | 689 | else |
6d53d7b1 | 690 | zebra_rnh_eval_nexthop_entry(zvrf, family, force, nrn, rnh, prn, |
691 | re); | |
d50b5bdd | 692 | } |
693 | ||
8ce5e6a3 | 694 | /* |
f0f77c9a DS |
695 | * Clear the ROUTE_ENTRY_NEXTHOPS_CHANGED flag |
696 | * from the re entries. | |
8ce5e6a3 DS |
697 | * |
698 | * Please note we are doing this *after* we have | |
699 | * notified the world about each nexthop as that | |
f0f77c9a | 700 | * we can have a situation where one re entry |
8ce5e6a3 DS |
701 | * covers multiple nexthops we are interested in. |
702 | */ | |
6d53d7b1 | 703 | static void zebra_rnh_clear_nhc_flag(struct zebra_vrf *zvrf, int family, |
d62a17ae | 704 | rnh_type_t type, struct route_node *nrn) |
8ce5e6a3 | 705 | { |
d62a17ae | 706 | struct rnh *rnh; |
707 | struct route_entry *re; | |
708 | struct route_node *prn; | |
8ce5e6a3 | 709 | |
d62a17ae | 710 | rnh = nrn->info; |
8ce5e6a3 | 711 | |
fd7fd9e5 DS |
712 | /* Identify route entry (RIB) resolving this tracked entry. */ |
713 | if (type == RNH_IMPORT_CHECK_TYPE) | |
6d53d7b1 | 714 | re = zebra_rnh_resolve_import_entry(zvrf, family, nrn, rnh, |
996c9314 | 715 | &prn); |
fd7fd9e5 | 716 | else |
6d53d7b1 | 717 | re = zebra_rnh_resolve_nexthop_entry(zvrf, family, nrn, rnh, |
fd7fd9e5 | 718 | &prn); |
8ce5e6a3 | 719 | |
332ad713 | 720 | if (re) { |
d62a17ae | 721 | UNSET_FLAG(re->status, ROUTE_ENTRY_NEXTHOPS_CHANGED); |
332ad713 RW |
722 | UNSET_FLAG(re->status, ROUTE_ENTRY_LABELS_CHANGED); |
723 | } | |
8ce5e6a3 | 724 | } |
d50b5bdd | 725 | |
726 | /* Evaluate all tracked entries (nexthops or routes for import into BGP) | |
727 | * of a particular VRF and address-family or a specific prefix. | |
728 | */ | |
6d53d7b1 | 729 | void zebra_evaluate_rnh(struct zebra_vrf *zvrf, int family, int force, |
730 | rnh_type_t type, struct prefix *p) | |
d50b5bdd | 731 | { |
d62a17ae | 732 | struct route_table *rnh_table; |
733 | struct route_node *nrn; | |
734 | ||
6d53d7b1 | 735 | rnh_table = get_rnh_table(zvrf->vrf->vrf_id, family, type); |
d62a17ae | 736 | if (!rnh_table) // unexpected |
737 | return; | |
738 | ||
739 | if (p) { | |
740 | /* Evaluating a specific entry, make sure it exists. */ | |
741 | nrn = route_node_lookup(rnh_table, p); | |
742 | if (nrn && nrn->info) | |
6d53d7b1 | 743 | zebra_rnh_evaluate_entry(zvrf, family, force, type, |
d62a17ae | 744 | nrn); |
745 | ||
746 | if (nrn) | |
747 | route_unlock_node(nrn); | |
748 | } else { | |
749 | /* Evaluate entire table. */ | |
750 | nrn = route_top(rnh_table); | |
751 | while (nrn) { | |
752 | if (nrn->info) | |
6d53d7b1 | 753 | zebra_rnh_evaluate_entry(zvrf, family, force, |
d62a17ae | 754 | type, nrn); |
755 | nrn = route_next(nrn); /* this will also unlock nrn */ | |
756 | } | |
757 | nrn = route_top(rnh_table); | |
758 | while (nrn) { | |
759 | if (nrn->info) | |
6d53d7b1 | 760 | zebra_rnh_clear_nhc_flag(zvrf, family, type, |
d62a17ae | 761 | nrn); |
762 | nrn = route_next(nrn); /* this will also unlock nrn */ | |
763 | } | |
764 | } | |
fb018d25 DS |
765 | } |
766 | ||
d62a17ae | 767 | void zebra_print_rnh_table(vrf_id_t vrfid, int af, struct vty *vty, |
768 | rnh_type_t type) | |
fb018d25 | 769 | { |
d62a17ae | 770 | struct route_table *table; |
771 | struct route_node *rn; | |
772 | ||
773 | table = get_rnh_table(vrfid, af, type); | |
774 | if (!table) { | |
775 | zlog_debug("print_rnhs: rnh table not found\n"); | |
776 | return; | |
777 | } | |
778 | ||
779 | for (rn = route_top(table); rn; rn = route_next(rn)) | |
780 | if (rn->info) | |
781 | print_rnh(rn, vty); | |
fb018d25 DS |
782 | } |
783 | ||
fb018d25 | 784 | /** |
f0f77c9a | 785 | * free_state - free up the re structure associated with the rnh. |
fb018d25 | 786 | */ |
d62a17ae | 787 | static void free_state(vrf_id_t vrf_id, struct route_entry *re, |
788 | struct route_node *rn) | |
fb018d25 | 789 | { |
fb018d25 | 790 | |
d62a17ae | 791 | if (!re) |
792 | return; | |
fb018d25 | 793 | |
d62a17ae | 794 | /* free RE and nexthops */ |
7ee30f28 | 795 | nexthops_free(re->ng.nexthop); |
d62a17ae | 796 | XFREE(MTYPE_RE, re); |
fb018d25 DS |
797 | } |
798 | ||
d62a17ae | 799 | static void copy_state(struct rnh *rnh, struct route_entry *re, |
800 | struct route_node *rn) | |
fb018d25 | 801 | { |
d62a17ae | 802 | struct route_entry *state; |
fb018d25 | 803 | |
d62a17ae | 804 | if (rnh->state) { |
805 | free_state(rnh->vrf_id, rnh->state, rn); | |
806 | rnh->state = NULL; | |
807 | } | |
fb018d25 | 808 | |
d62a17ae | 809 | if (!re) |
810 | return; | |
fb018d25 | 811 | |
d62a17ae | 812 | state = XCALLOC(MTYPE_RE, sizeof(struct route_entry)); |
813 | state->type = re->type; | |
7733c6c4 | 814 | state->distance = re->distance; |
d62a17ae | 815 | state->metric = re->metric; |
8f43b4d8 | 816 | state->vrf_id = re->vrf_id; |
fb018d25 | 817 | |
7ee30f28 | 818 | route_entry_copy_nexthops(state, re->ng.nexthop); |
d62a17ae | 819 | rnh->state = state; |
fb018d25 DS |
820 | } |
821 | ||
d62a17ae | 822 | static int compare_state(struct route_entry *r1, struct route_entry *r2) |
fb018d25 | 823 | { |
fb018d25 | 824 | |
d62a17ae | 825 | if (!r1 && !r2) |
826 | return 0; | |
fb018d25 | 827 | |
d62a17ae | 828 | if ((!r1 && r2) || (r1 && !r2)) |
829 | return 1; | |
fb018d25 | 830 | |
7733c6c4 JB |
831 | if (r1->distance != r2->distance) |
832 | return 1; | |
833 | ||
d62a17ae | 834 | if (r1->metric != r2->metric) |
835 | return 1; | |
fb018d25 | 836 | |
d62a17ae | 837 | if (r1->nexthop_num != r2->nexthop_num) |
838 | return 1; | |
fb018d25 | 839 | |
332ad713 RW |
840 | if (CHECK_FLAG(r1->status, ROUTE_ENTRY_NEXTHOPS_CHANGED) |
841 | || CHECK_FLAG(r1->status, ROUTE_ENTRY_LABELS_CHANGED)) | |
d62a17ae | 842 | return 1; |
fb018d25 | 843 | |
d62a17ae | 844 | return 0; |
fb018d25 DS |
845 | } |
846 | ||
d62a17ae | 847 | static int send_client(struct rnh *rnh, struct zserv *client, rnh_type_t type, |
848 | vrf_id_t vrf_id) | |
fb018d25 | 849 | { |
d62a17ae | 850 | struct stream *s; |
851 | struct route_entry *re; | |
852 | unsigned long nump; | |
d7c0a89a | 853 | uint8_t num; |
0acf4df0 | 854 | struct nexthop *nh; |
d62a17ae | 855 | struct route_node *rn; |
856 | int cmd = (type == RNH_IMPORT_CHECK_TYPE) ? ZEBRA_IMPORT_CHECK_UPDATE | |
857 | : ZEBRA_NEXTHOP_UPDATE; | |
858 | ||
859 | rn = rnh->node; | |
860 | re = rnh->state; | |
861 | ||
862 | /* Get output stream. */ | |
1002497a | 863 | s = stream_new(ZEBRA_MAX_PACKET_SIZ); |
d62a17ae | 864 | |
7cf15b25 | 865 | zclient_create_header(s, cmd, vrf_id); |
d62a17ae | 866 | |
867 | stream_putw(s, rn->p.family); | |
868 | switch (rn->p.family) { | |
869 | case AF_INET: | |
870 | stream_putc(s, rn->p.prefixlen); | |
871 | stream_put_in_addr(s, &rn->p.u.prefix4); | |
fb018d25 | 872 | break; |
d62a17ae | 873 | case AF_INET6: |
874 | stream_putc(s, rn->p.prefixlen); | |
875 | stream_put(s, &rn->p.u.prefix6, IPV6_MAX_BYTELEN); | |
fb018d25 | 876 | break; |
d62a17ae | 877 | default: |
e914ccbe | 878 | flog_err(EC_ZEBRA_RNH_UNKNOWN_FAMILY, |
1c50c1c0 QY |
879 | "%s: Unknown family (%d) notification attempted\n", |
880 | __FUNCTION__, rn->p.family); | |
fb018d25 | 881 | break; |
d62a17ae | 882 | } |
883 | if (re) { | |
05dd5aaf DS |
884 | stream_putc(s, re->type); |
885 | stream_putw(s, re->instance); | |
d62a17ae | 886 | stream_putc(s, re->distance); |
887 | stream_putl(s, re->metric); | |
888 | num = 0; | |
889 | nump = stream_get_endp(s); | |
890 | stream_putc(s, 0); | |
0acf4df0 DS |
891 | for (nh = re->ng.nexthop; nh; nh = nh->next) |
892 | if ((CHECK_FLAG(nh->flags, NEXTHOP_FLAG_FIB) | |
893 | || CHECK_FLAG(nh->flags, NEXTHOP_FLAG_RECURSIVE)) | |
894 | && CHECK_FLAG(nh->flags, NEXTHOP_FLAG_ACTIVE)) { | |
895 | stream_putc(s, nh->type); | |
896 | switch (nh->type) { | |
d62a17ae | 897 | case NEXTHOP_TYPE_IPV4: |
aab09c10 | 898 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
0acf4df0 DS |
899 | stream_put_in_addr(s, &nh->gate.ipv4); |
900 | stream_putl(s, nh->ifindex); | |
d62a17ae | 901 | break; |
902 | case NEXTHOP_TYPE_IFINDEX: | |
0acf4df0 | 903 | stream_putl(s, nh->ifindex); |
d62a17ae | 904 | break; |
d62a17ae | 905 | case NEXTHOP_TYPE_IPV6: |
d62a17ae | 906 | case NEXTHOP_TYPE_IPV6_IFINDEX: |
0acf4df0 DS |
907 | stream_put(s, &nh->gate.ipv6, 16); |
908 | stream_putl(s, nh->ifindex); | |
d62a17ae | 909 | break; |
910 | default: | |
911 | /* do nothing */ | |
912 | break; | |
913 | } | |
0acf4df0 DS |
914 | if (nh->nh_label) { |
915 | stream_putc(s, | |
916 | nh->nh_label->num_labels); | |
917 | if (nh->nh_label->num_labels) | |
918 | stream_put( | |
919 | s, | |
920 | &nh->nh_label->label[0], | |
921 | nh->nh_label->num_labels | |
922 | * sizeof(mpls_label_t)); | |
923 | } else | |
924 | stream_putc(s, 0); | |
d62a17ae | 925 | num++; |
926 | } | |
927 | stream_putc_at(s, nump, num); | |
928 | } else { | |
05dd5aaf DS |
929 | stream_putc(s, 0); // type |
930 | stream_putw(s, 0); // instance | |
d62a17ae | 931 | stream_putc(s, 0); // distance |
932 | stream_putl(s, 0); // metric | |
933 | stream_putc(s, 0); // nexthops | |
934 | } | |
935 | stream_putw_at(s, 0, stream_get_endp(s)); | |
936 | ||
937 | client->nh_last_upd_time = monotime(NULL); | |
938 | client->last_write_cmd = cmd; | |
21ccc0cf | 939 | return zserv_send_message(client, s); |
fb018d25 DS |
940 | } |
941 | ||
d62a17ae | 942 | static void print_nh(struct nexthop *nexthop, struct vty *vty) |
fb018d25 | 943 | { |
d62a17ae | 944 | char buf[BUFSIZ]; |
945 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); | |
946 | ||
947 | switch (nexthop->type) { | |
948 | case NEXTHOP_TYPE_IPV4: | |
949 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
950 | vty_out(vty, " via %s", inet_ntoa(nexthop->gate.ipv4)); | |
951 | if (nexthop->ifindex) | |
952 | vty_out(vty, ", %s", | |
953 | ifindex2ifname_per_ns(zns, nexthop->ifindex)); | |
954 | break; | |
955 | case NEXTHOP_TYPE_IPV6: | |
956 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
957 | vty_out(vty, " %s", | |
958 | inet_ntop(AF_INET6, &nexthop->gate.ipv6, buf, BUFSIZ)); | |
959 | if (nexthop->ifindex) | |
960 | vty_out(vty, ", via %s", | |
961 | ifindex2ifname_per_ns(zns, nexthop->ifindex)); | |
962 | break; | |
963 | case NEXTHOP_TYPE_IFINDEX: | |
964 | vty_out(vty, " is directly connected, %s", | |
965 | ifindex2ifname_per_ns(zns, nexthop->ifindex)); | |
966 | break; | |
967 | case NEXTHOP_TYPE_BLACKHOLE: | |
968 | vty_out(vty, " is directly connected, Null0"); | |
969 | break; | |
970 | default: | |
971 | break; | |
972 | } | |
973 | vty_out(vty, "\n"); | |
fb018d25 DS |
974 | } |
975 | ||
d62a17ae | 976 | static void print_rnh(struct route_node *rn, struct vty *vty) |
fb018d25 | 977 | { |
d62a17ae | 978 | struct rnh *rnh; |
979 | struct nexthop *nexthop; | |
980 | struct listnode *node; | |
981 | struct zserv *client; | |
982 | char buf[BUFSIZ]; | |
983 | ||
984 | rnh = rn->info; | |
985 | vty_out(vty, "%s%s\n", | |
986 | inet_ntop(rn->p.family, &rn->p.u.prefix, buf, BUFSIZ), | |
987 | CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED) ? "(Connected)" | |
988 | : ""); | |
989 | if (rnh->state) { | |
990 | vty_out(vty, " resolved via %s\n", | |
991 | zebra_route_string(rnh->state->type)); | |
7ee30f28 | 992 | for (nexthop = rnh->state->ng.nexthop; nexthop; |
d62a17ae | 993 | nexthop = nexthop->next) |
994 | print_nh(nexthop, vty); | |
995 | } else | |
996 | vty_out(vty, " unresolved%s\n", | |
997 | CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED) | |
998 | ? "(Connected)" | |
999 | : ""); | |
1000 | ||
1001 | vty_out(vty, " Client list:"); | |
1002 | for (ALL_LIST_ELEMENTS_RO(rnh->client_list, node, client)) | |
1003 | vty_out(vty, " %s(fd %d)%s", zebra_route_string(client->proto), | |
1004 | client->sock, | |
1005 | rnh->filtered[client->proto] ? "(filtered)" : ""); | |
731a75fe RW |
1006 | if (!list_isempty(rnh->zebra_pseudowire_list)) |
1007 | vty_out(vty, " zebra[pseudowires]"); | |
d62a17ae | 1008 | vty_out(vty, "\n"); |
fb018d25 | 1009 | } |
bf094f69 QY |
1010 | |
1011 | static int zebra_cleanup_rnh_client(vrf_id_t vrf_id, int family, | |
1012 | struct zserv *client, rnh_type_t type) | |
1013 | { | |
1014 | struct route_table *ntable; | |
1015 | struct route_node *nrn; | |
1016 | struct rnh *rnh; | |
1017 | ||
1018 | if (IS_ZEBRA_DEBUG_NHT) | |
1019 | zlog_debug("%u: Client %s RNH cleanup for family %d type %d", | |
1020 | vrf_id, zebra_route_string(client->proto), family, | |
1021 | type); | |
1022 | ||
1023 | ntable = get_rnh_table(vrf_id, family, type); | |
1024 | if (!ntable) { | |
1025 | zlog_debug("cleanup_rnh_client: rnh table not found\n"); | |
1026 | return -1; | |
1027 | } | |
1028 | ||
1029 | for (nrn = route_top(ntable); nrn; nrn = route_next(nrn)) { | |
1030 | if (!nrn->info) | |
1031 | continue; | |
1032 | ||
1033 | rnh = nrn->info; | |
1034 | zebra_remove_rnh_client(rnh, client, type); | |
1035 | } | |
1036 | return 1; | |
1037 | } | |
1038 | ||
1039 | /* Cleanup registered nexthops (across VRFs) upon client disconnect. */ | |
453844ab | 1040 | static int zebra_client_cleanup_rnh(struct zserv *client) |
bf094f69 QY |
1041 | { |
1042 | struct vrf *vrf; | |
1043 | struct zebra_vrf *zvrf; | |
1044 | ||
1045 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { | |
8b1766b1 QY |
1046 | zvrf = vrf->info; |
1047 | if (zvrf) { | |
bf094f69 QY |
1048 | zebra_cleanup_rnh_client(zvrf_id(zvrf), AF_INET, client, |
1049 | RNH_NEXTHOP_TYPE); | |
1050 | zebra_cleanup_rnh_client(zvrf_id(zvrf), AF_INET6, | |
1051 | client, RNH_NEXTHOP_TYPE); | |
1052 | zebra_cleanup_rnh_client(zvrf_id(zvrf), AF_INET, client, | |
1053 | RNH_IMPORT_CHECK_TYPE); | |
1054 | zebra_cleanup_rnh_client(zvrf_id(zvrf), AF_INET6, | |
1055 | client, RNH_IMPORT_CHECK_TYPE); | |
1056 | if (client->proto == ZEBRA_ROUTE_LDP) { | |
1057 | hash_iterate(zvrf->lsp_table, | |
1058 | mpls_ldp_lsp_uninstall_all, | |
1059 | zvrf->lsp_table); | |
1060 | mpls_ldp_ftn_uninstall_all(zvrf, AFI_IP); | |
1061 | mpls_ldp_ftn_uninstall_all(zvrf, AFI_IP6); | |
1062 | } | |
1063 | } | |
1064 | } | |
453844ab QY |
1065 | |
1066 | return 0; | |
bf094f69 | 1067 | } |