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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" |
fb018d25 | 50 | |
d62a17ae | 51 | static void free_state(vrf_id_t vrf_id, struct route_entry *re, |
52 | struct route_node *rn); | |
f0f77c9a | 53 | static void copy_state(struct rnh *rnh, struct route_entry *re, |
078430f6 | 54 | struct route_node *rn); |
d62a17ae | 55 | #define lookup_rnh_table(v, f) \ |
56 | ({ \ | |
57 | struct zebra_vrf *zvrf; \ | |
58 | struct route_table *t = NULL; \ | |
59 | zvrf = zebra_vrf_lookup_by_id(v); \ | |
60 | if (zvrf) \ | |
61 | t = zvrf->rnh_table[family2afi(f)]; \ | |
62 | t; \ | |
63 | }) | |
b72ede27 | 64 | |
f0f77c9a | 65 | static int compare_state(struct route_entry *r1, struct route_entry *r2); |
7076bb2f | 66 | static int send_client(struct rnh *rnh, struct zserv *client, rnh_type_t type, |
d62a17ae | 67 | vrf_id_t vrf_id); |
fb018d25 DS |
68 | static void print_rnh(struct route_node *rn, struct vty *vty); |
69 | ||
a50b580a DS |
70 | int zebra_rnh_ip_default_route = 0; |
71 | int zebra_rnh_ipv6_default_route = 0; | |
72 | ||
b72ede27 | 73 | static inline struct route_table *get_rnh_table(vrf_id_t vrfid, int family, |
078430f6 DS |
74 | rnh_type_t type) |
75 | { | |
d62a17ae | 76 | struct zebra_vrf *zvrf; |
77 | struct route_table *t = NULL; | |
78 | ||
79 | zvrf = zebra_vrf_lookup_by_id(vrfid); | |
80 | if (zvrf) | |
81 | switch (type) { | |
82 | case RNH_NEXTHOP_TYPE: | |
83 | t = zvrf->rnh_table[family2afi(family)]; | |
84 | break; | |
85 | case RNH_IMPORT_CHECK_TYPE: | |
86 | t = zvrf->import_check_table[family2afi(family)]; | |
87 | break; | |
88 | } | |
89 | ||
90 | return t; | |
078430f6 DS |
91 | } |
92 | ||
d62a17ae | 93 | char *rnh_str(struct rnh *rnh, char *buf, int size) |
fb018d25 | 94 | { |
d62a17ae | 95 | prefix2str(&(rnh->node->p), buf, size); |
96 | return buf; | |
fb018d25 DS |
97 | } |
98 | ||
d62a17ae | 99 | struct rnh *zebra_add_rnh(struct prefix *p, vrf_id_t vrfid, rnh_type_t type) |
fb018d25 | 100 | { |
d62a17ae | 101 | struct route_table *table; |
102 | struct route_node *rn; | |
103 | struct rnh *rnh = NULL; | |
104 | char buf[PREFIX2STR_BUFFER]; | |
105 | ||
106 | if (IS_ZEBRA_DEBUG_NHT) { | |
107 | prefix2str(p, buf, sizeof(buf)); | |
108 | zlog_debug("%u: Add RNH %s type %d", vrfid, buf, type); | |
109 | } | |
110 | table = get_rnh_table(vrfid, PREFIX_FAMILY(p), type); | |
111 | if (!table) { | |
112 | prefix2str(p, buf, sizeof(buf)); | |
113 | zlog_warn("%u: Add RNH %s type %d - table not found", vrfid, | |
114 | buf, type); | |
115 | return NULL; | |
116 | } | |
117 | ||
118 | /* Make it sure prefixlen is applied to the prefix. */ | |
119 | apply_mask(p); | |
120 | ||
121 | /* Lookup (or add) route node.*/ | |
122 | rn = route_node_get(table, p); | |
123 | ||
124 | if (!rn->info) { | |
125 | rnh = XCALLOC(MTYPE_RNH, sizeof(struct rnh)); | |
126 | rnh->client_list = list_new(); | |
127 | rnh->vrf_id = vrfid; | |
128 | rnh->zebra_static_route_list = list_new(); | |
731a75fe | 129 | rnh->zebra_pseudowire_list = list_new(); |
d62a17ae | 130 | route_lock_node(rn); |
131 | rn->info = rnh; | |
132 | rnh->node = rn; | |
133 | } | |
134 | ||
135 | route_unlock_node(rn); | |
136 | return (rn->info); | |
fb018d25 DS |
137 | } |
138 | ||
d62a17ae | 139 | struct rnh *zebra_lookup_rnh(struct prefix *p, vrf_id_t vrfid, rnh_type_t type) |
fb018d25 | 140 | { |
d62a17ae | 141 | struct route_table *table; |
142 | struct route_node *rn; | |
fb018d25 | 143 | |
d62a17ae | 144 | table = get_rnh_table(vrfid, PREFIX_FAMILY(p), type); |
145 | if (!table) | |
146 | return NULL; | |
fb018d25 | 147 | |
d62a17ae | 148 | /* Make it sure prefixlen is applied to the prefix. */ |
149 | apply_mask(p); | |
fb018d25 | 150 | |
d62a17ae | 151 | /* Lookup route node.*/ |
152 | rn = route_node_lookup(table, p); | |
153 | if (!rn) | |
154 | return NULL; | |
fb018d25 | 155 | |
d62a17ae | 156 | route_unlock_node(rn); |
157 | return (rn->info); | |
fb018d25 DS |
158 | } |
159 | ||
d62a17ae | 160 | void zebra_free_rnh(struct rnh *rnh) |
5a8dfcd8 | 161 | { |
d62a17ae | 162 | rnh->flags |= ZEBRA_NHT_DELETED; |
163 | list_free(rnh->client_list); | |
164 | list_free(rnh->zebra_static_route_list); | |
731a75fe | 165 | list_free(rnh->zebra_pseudowire_list); |
d62a17ae | 166 | free_state(rnh->vrf_id, rnh->state, rnh->node); |
167 | XFREE(MTYPE_RNH, rnh); | |
5a8dfcd8 RW |
168 | } |
169 | ||
d62a17ae | 170 | void zebra_delete_rnh(struct rnh *rnh, rnh_type_t type) |
fb018d25 | 171 | { |
d62a17ae | 172 | struct route_node *rn; |
fb018d25 | 173 | |
d62a17ae | 174 | if (!rnh || (rnh->flags & ZEBRA_NHT_DELETED) || !(rn = rnh->node)) |
175 | return; | |
fb018d25 | 176 | |
d62a17ae | 177 | if (IS_ZEBRA_DEBUG_NHT) { |
178 | char buf[PREFIX2STR_BUFFER]; | |
179 | zlog_debug("%u: Del RNH %s type %d", rnh->vrf_id, | |
180 | rnh_str(rnh, buf, sizeof(buf)), type); | |
181 | } | |
fb018d25 | 182 | |
d62a17ae | 183 | zebra_free_rnh(rnh); |
184 | rn->info = NULL; | |
185 | route_unlock_node(rn); | |
fb018d25 DS |
186 | } |
187 | ||
d62a17ae | 188 | void zebra_add_rnh_client(struct rnh *rnh, struct zserv *client, |
189 | rnh_type_t type, vrf_id_t vrf_id) | |
fb018d25 | 190 | { |
d62a17ae | 191 | if (IS_ZEBRA_DEBUG_NHT) { |
192 | char buf[PREFIX2STR_BUFFER]; | |
193 | zlog_debug("%u: Client %s registers for RNH %s type %d", vrf_id, | |
194 | zebra_route_string(client->proto), | |
195 | rnh_str(rnh, buf, sizeof(buf)), type); | |
196 | } | |
197 | if (!listnode_lookup(rnh->client_list, client)) { | |
198 | listnode_add(rnh->client_list, client); | |
199 | send_client(rnh, client, type, | |
200 | vrf_id); // Pending: check if its needed | |
201 | } | |
fb018d25 DS |
202 | } |
203 | ||
d62a17ae | 204 | void zebra_remove_rnh_client(struct rnh *rnh, struct zserv *client, |
205 | rnh_type_t type) | |
fb018d25 | 206 | { |
d62a17ae | 207 | if (IS_ZEBRA_DEBUG_NHT) { |
208 | char buf[PREFIX2STR_BUFFER]; | |
209 | zlog_debug("Client %s unregisters for RNH %s type %d", | |
210 | zebra_route_string(client->proto), | |
211 | rnh_str(rnh, buf, sizeof(buf)), type); | |
212 | } | |
213 | listnode_delete(rnh->client_list, client); | |
214 | if (list_isempty(rnh->client_list) | |
731a75fe RW |
215 | && list_isempty(rnh->zebra_static_route_list) |
216 | && list_isempty(rnh->zebra_pseudowire_list)) | |
d62a17ae | 217 | zebra_delete_rnh(rnh, type); |
6e26278c DS |
218 | } |
219 | ||
d62a17ae | 220 | void zebra_register_rnh_static_nh(vrf_id_t vrf_id, struct prefix *nh, |
221 | struct route_node *static_rn) | |
6e26278c | 222 | { |
d62a17ae | 223 | struct rnh *rnh; |
6e26278c | 224 | |
d62a17ae | 225 | rnh = zebra_add_rnh(nh, vrf_id, RNH_NEXTHOP_TYPE); |
226 | if (rnh && !listnode_lookup(rnh->zebra_static_route_list, static_rn)) { | |
227 | listnode_add(rnh->zebra_static_route_list, static_rn); | |
228 | } | |
6e26278c DS |
229 | } |
230 | ||
d62a17ae | 231 | void zebra_deregister_rnh_static_nh(vrf_id_t vrf_id, struct prefix *nh, |
232 | struct route_node *static_rn) | |
6e26278c | 233 | { |
d62a17ae | 234 | struct rnh *rnh; |
6e26278c | 235 | |
d62a17ae | 236 | rnh = zebra_lookup_rnh(nh, vrf_id, RNH_NEXTHOP_TYPE); |
237 | if (!rnh || (rnh->flags & ZEBRA_NHT_DELETED)) | |
238 | return; | |
6e26278c | 239 | |
d62a17ae | 240 | listnode_delete(rnh->zebra_static_route_list, static_rn); |
6e26278c | 241 | |
d62a17ae | 242 | if (list_isempty(rnh->client_list) |
731a75fe RW |
243 | && list_isempty(rnh->zebra_static_route_list) |
244 | && list_isempty(rnh->zebra_pseudowire_list)) | |
d62a17ae | 245 | zebra_delete_rnh(rnh, RNH_NEXTHOP_TYPE); |
fb018d25 DS |
246 | } |
247 | ||
d62a17ae | 248 | void zebra_deregister_rnh_static_nexthops(vrf_id_t vrf_id, |
249 | struct nexthop *nexthop, | |
250 | struct route_node *rn) | |
a399694f | 251 | { |
d62a17ae | 252 | struct nexthop *nh; |
253 | struct prefix nh_p; | |
254 | ||
255 | for (nh = nexthop; nh; nh = nh->next) { | |
256 | switch (nh->type) { | |
257 | case NEXTHOP_TYPE_IPV4: | |
258 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
259 | nh_p.family = AF_INET; | |
260 | nh_p.prefixlen = IPV4_MAX_BITLEN; | |
261 | nh_p.u.prefix4 = nh->gate.ipv4; | |
262 | break; | |
263 | case NEXTHOP_TYPE_IPV6: | |
264 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
265 | nh_p.family = AF_INET6; | |
266 | nh_p.prefixlen = IPV6_MAX_BITLEN; | |
267 | nh_p.u.prefix6 = nh->gate.ipv6; | |
268 | break; | |
269 | /* | |
270 | * Not sure what really to do here, we are not | |
271 | * supposed to have either of these for NHT | |
272 | * and the code has no way to know what prefix | |
273 | * to use. So I'm going to just continue | |
274 | * for the moment, which is preferable to | |
275 | * what is currently happening which is a | |
276 | * CRASH and BURN. | |
277 | * Some simple testing shows that we | |
278 | * are not leaving slag around for these | |
279 | * skipped static routes. Since | |
280 | * they don't appear to be installed | |
281 | */ | |
282 | case NEXTHOP_TYPE_IFINDEX: | |
283 | case NEXTHOP_TYPE_BLACKHOLE: | |
284 | continue; | |
285 | break; | |
286 | } | |
287 | zebra_deregister_rnh_static_nh(vrf_id, &nh_p, rn); | |
288 | } | |
a399694f DS |
289 | } |
290 | ||
731a75fe RW |
291 | /* XXX move this utility function elsewhere? */ |
292 | static void addr2hostprefix(int af, const union g_addr *addr, | |
293 | struct prefix *prefix) | |
294 | { | |
295 | switch (af) { | |
296 | case AF_INET: | |
297 | prefix->family = AF_INET; | |
298 | prefix->prefixlen = IPV4_MAX_BITLEN; | |
299 | prefix->u.prefix4 = addr->ipv4; | |
300 | break; | |
301 | case AF_INET6: | |
302 | prefix->family = AF_INET6; | |
303 | prefix->prefixlen = IPV6_MAX_BITLEN; | |
304 | prefix->u.prefix6 = addr->ipv6; | |
305 | break; | |
306 | default: | |
307 | zlog_warn("%s: unknown address family %d", __func__, af); | |
308 | break; | |
309 | } | |
310 | } | |
311 | ||
312 | void zebra_register_rnh_pseudowire(vrf_id_t vrf_id, struct zebra_pw *pw) | |
313 | { | |
314 | struct prefix nh; | |
315 | struct rnh *rnh; | |
316 | ||
317 | addr2hostprefix(pw->af, &pw->nexthop, &nh); | |
318 | rnh = zebra_add_rnh(&nh, vrf_id, RNH_NEXTHOP_TYPE); | |
319 | if (rnh && !listnode_lookup(rnh->zebra_pseudowire_list, pw)) { | |
320 | listnode_add(rnh->zebra_pseudowire_list, pw); | |
321 | pw->rnh = rnh; | |
322 | zebra_evaluate_rnh(vrf_id, pw->af, 1, RNH_NEXTHOP_TYPE, &nh); | |
323 | } | |
324 | } | |
325 | ||
326 | void zebra_deregister_rnh_pseudowire(vrf_id_t vrf_id, struct zebra_pw *pw) | |
327 | { | |
328 | struct rnh *rnh; | |
329 | ||
330 | rnh = pw->rnh; | |
331 | if (!rnh) | |
332 | return; | |
333 | ||
334 | listnode_delete(rnh->zebra_pseudowire_list, pw); | |
335 | pw->rnh = NULL; | |
336 | ||
337 | if (list_isempty(rnh->client_list) | |
338 | && list_isempty(rnh->zebra_static_route_list) | |
339 | && list_isempty(rnh->zebra_pseudowire_list)) | |
340 | zebra_delete_rnh(rnh, RNH_NEXTHOP_TYPE); | |
341 | } | |
342 | ||
d50b5bdd | 343 | /* Apply the NHT route-map for a client to the route (and nexthops) |
344 | * resolving a NH. | |
345 | */ | |
d62a17ae | 346 | static int zebra_rnh_apply_nht_rmap(int family, struct route_node *prn, |
347 | struct route_entry *re, int proto) | |
6e26278c | 348 | { |
d62a17ae | 349 | int at_least_one = 0; |
350 | int rmap_family; /* Route map has diff AF family enum */ | |
351 | struct nexthop *nexthop; | |
352 | int ret; | |
353 | ||
354 | rmap_family = (family == AF_INET) ? AFI_IP : AFI_IP6; | |
355 | ||
356 | if (prn && re) { | |
357 | for (nexthop = re->nexthop; nexthop; nexthop = nexthop->next) { | |
358 | ret = zebra_nht_route_map_check(rmap_family, proto, | |
359 | &prn->p, re, nexthop); | |
360 | if (ret != RMAP_DENYMATCH) { | |
361 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
362 | at_least_one++; /* at least one valid NH */ | |
363 | } else { | |
364 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
365 | } | |
366 | } | |
6e26278c | 367 | } |
d62a17ae | 368 | return (at_least_one); |
6e26278c DS |
369 | } |
370 | ||
d50b5bdd | 371 | /* |
f0f77c9a | 372 | * Determine appropriate route (RE entry) resolving a tracked entry |
d50b5bdd | 373 | * (nexthop or BGP route for import). |
374 | */ | |
d62a17ae | 375 | static struct route_entry *zebra_rnh_resolve_entry(vrf_id_t vrfid, int family, |
376 | rnh_type_t type, | |
377 | struct route_node *nrn, | |
378 | struct rnh *rnh, | |
379 | struct route_node **prn) | |
fb018d25 | 380 | { |
d62a17ae | 381 | struct route_table *route_table; |
382 | struct route_node *rn; | |
383 | struct route_entry *re; | |
384 | ||
385 | *prn = NULL; | |
386 | ||
387 | route_table = zebra_vrf_table(family2afi(family), SAFI_UNICAST, vrfid); | |
388 | if (!route_table) // unexpected | |
389 | return NULL; | |
390 | ||
391 | rn = route_node_match(route_table, &nrn->p); | |
392 | if (!rn) | |
393 | return NULL; | |
394 | ||
395 | /* When resolving nexthops, do not resolve via the default route unless | |
396 | * 'ip nht resolve-via-default' is configured. | |
397 | */ | |
398 | if ((type == RNH_NEXTHOP_TYPE) | |
399 | && (is_default_prefix(&rn->p) | |
400 | && !nh_resolve_via_default(rn->p.family))) | |
401 | re = NULL; | |
402 | else if ((type == RNH_IMPORT_CHECK_TYPE) | |
403 | && CHECK_FLAG(rnh->flags, ZEBRA_NHT_EXACT_MATCH) | |
404 | && !prefix_same(&nrn->p, &rn->p)) | |
405 | re = NULL; | |
406 | else { | |
407 | /* Identify appropriate route entry. */ | |
408 | RNODE_FOREACH_RE(rn, re) | |
409 | { | |
410 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) | |
411 | continue; | |
412 | if (!CHECK_FLAG(re->status, ROUTE_ENTRY_SELECTED_FIB)) | |
413 | continue; | |
414 | ||
415 | if (CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED)) { | |
416 | if (re->type == ZEBRA_ROUTE_CONNECT) | |
417 | break; | |
418 | if (re->type == ZEBRA_ROUTE_NHRP) { | |
419 | struct nexthop *nexthop; | |
420 | for (nexthop = re->nexthop; nexthop; | |
421 | nexthop = nexthop->next) | |
422 | if (nexthop->type | |
423 | == NEXTHOP_TYPE_IFINDEX) | |
424 | break; | |
425 | if (nexthop) | |
426 | break; | |
427 | } | |
428 | } else if ((type == RNH_IMPORT_CHECK_TYPE) | |
429 | && (re->type == ZEBRA_ROUTE_BGP)) | |
430 | continue; | |
431 | else | |
432 | break; | |
433 | } | |
434 | } | |
435 | ||
436 | /* Need to unlock route node */ | |
437 | route_unlock_node(rn); | |
438 | if (re) | |
439 | *prn = rn; | |
440 | return re; | |
d50b5bdd | 441 | } |
442 | ||
443 | /* | |
444 | * See if a tracked route entry for import (by BGP) has undergone any | |
445 | * change, and if so, notify the client. | |
446 | */ | |
d62a17ae | 447 | static void zebra_rnh_eval_import_check_entry(vrf_id_t vrfid, int family, |
448 | int force, struct route_node *nrn, | |
449 | struct rnh *rnh, | |
450 | struct route_entry *re) | |
d50b5bdd | 451 | { |
d62a17ae | 452 | int state_changed = 0; |
453 | struct zserv *client; | |
454 | char bufn[INET6_ADDRSTRLEN]; | |
455 | struct listnode *node; | |
456 | struct nexthop *nexthop; | |
457 | ||
458 | if (re && (rnh->state == NULL)) { | |
459 | for (ALL_NEXTHOPS(re->nexthop, nexthop)) | |
460 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) { | |
461 | state_changed = 1; | |
462 | break; | |
463 | } | |
464 | } else if (!re && (rnh->state != NULL)) | |
465 | state_changed = 1; | |
466 | ||
467 | if (compare_state(re, rnh->state)) | |
468 | copy_state(rnh, re, nrn); | |
469 | ||
470 | if (state_changed || force) { | |
471 | if (IS_ZEBRA_DEBUG_NHT) { | |
472 | prefix2str(&nrn->p, bufn, INET6_ADDRSTRLEN); | |
473 | zlog_debug("%u:%s: Route import check %s %s\n", vrfid, | |
474 | bufn, rnh->state ? "passed" : "failed", | |
475 | state_changed ? "(state changed)" : ""); | |
476 | } | |
477 | /* state changed, notify clients */ | |
478 | for (ALL_LIST_ELEMENTS_RO(rnh->client_list, node, client)) { | |
479 | send_client(rnh, client, RNH_IMPORT_CHECK_TYPE, vrfid); | |
480 | } | |
481 | } | |
d50b5bdd | 482 | } |
fb018d25 | 483 | |
d50b5bdd | 484 | /* |
485 | * Notify clients registered for this nexthop about a change. | |
486 | */ | |
d62a17ae | 487 | static void zebra_rnh_notify_protocol_clients(vrf_id_t vrfid, int family, |
488 | struct route_node *nrn, | |
489 | struct rnh *rnh, | |
490 | struct route_node *prn, | |
491 | struct route_entry *re) | |
d50b5bdd | 492 | { |
d62a17ae | 493 | struct listnode *node; |
494 | struct zserv *client; | |
495 | char bufn[INET6_ADDRSTRLEN]; | |
496 | char bufp[INET6_ADDRSTRLEN]; | |
497 | int num_resolving_nh; | |
498 | ||
499 | if (IS_ZEBRA_DEBUG_NHT) { | |
500 | prefix2str(&nrn->p, bufn, INET6_ADDRSTRLEN); | |
501 | if (prn && re) { | |
502 | prefix2str(&prn->p, bufp, INET6_ADDRSTRLEN); | |
503 | zlog_debug("%u:%s: NH resolved over route %s", vrfid, | |
504 | bufn, bufp); | |
505 | } else | |
506 | zlog_debug("%u:%s: NH has become unresolved", vrfid, | |
507 | bufn); | |
508 | } | |
509 | ||
510 | for (ALL_LIST_ELEMENTS_RO(rnh->client_list, node, client)) { | |
511 | if (prn && re) { | |
512 | /* Apply route-map for this client to route resolving | |
513 | * this | |
514 | * nexthop to see if it is filtered or not. | |
515 | */ | |
516 | num_resolving_nh = zebra_rnh_apply_nht_rmap( | |
517 | family, prn, re, client->proto); | |
518 | if (num_resolving_nh) | |
519 | rnh->filtered[client->proto] = 0; | |
520 | else | |
521 | rnh->filtered[client->proto] = 1; | |
522 | ||
523 | if (IS_ZEBRA_DEBUG_NHT) | |
524 | zlog_debug( | |
525 | "%u:%s: Notifying client %s about NH %s", | |
526 | vrfid, bufn, | |
527 | zebra_route_string(client->proto), | |
528 | num_resolving_nh | |
529 | ? "" | |
530 | : "(filtered by route-map)"); | |
531 | } else { | |
532 | rnh->filtered[client->proto] = 0; | |
533 | if (IS_ZEBRA_DEBUG_NHT) | |
534 | zlog_debug( | |
535 | "%u:%s: Notifying client %s about NH (unreachable)", | |
536 | vrfid, bufn, | |
537 | zebra_route_string(client->proto)); | |
538 | } | |
539 | ||
540 | send_client(rnh, client, RNH_NEXTHOP_TYPE, vrfid); | |
541 | } | |
d50b5bdd | 542 | } |
078430f6 | 543 | |
d62a17ae | 544 | static void zebra_rnh_process_static_routes(vrf_id_t vrfid, int family, |
545 | struct route_node *nrn, | |
546 | struct rnh *rnh, | |
547 | struct route_node *prn, | |
548 | struct route_entry *re) | |
d50b5bdd | 549 | { |
d62a17ae | 550 | struct listnode *node; |
551 | int num_resolving_nh = 0; | |
552 | struct route_node *static_rn; | |
553 | struct route_entry *sre; | |
554 | struct nexthop *nexthop; | |
555 | char bufn[INET6_ADDRSTRLEN]; | |
556 | char bufp[INET6_ADDRSTRLEN]; | |
557 | char bufs[INET6_ADDRSTRLEN]; | |
558 | ||
559 | if (IS_ZEBRA_DEBUG_NHT) { | |
560 | prefix2str(&nrn->p, bufn, INET6_ADDRSTRLEN); | |
561 | if (prn) | |
562 | prefix2str(&prn->p, bufp, INET6_ADDRSTRLEN); | |
563 | } | |
078430f6 | 564 | |
d62a17ae | 565 | if (prn && re) { |
566 | /* Apply route-map for "static" to route resolving this | |
567 | * nexthop to see if it is filtered or not. | |
568 | */ | |
569 | num_resolving_nh = zebra_rnh_apply_nht_rmap(family, prn, re, | |
570 | ZEBRA_ROUTE_STATIC); | |
571 | if (num_resolving_nh) | |
572 | rnh->filtered[ZEBRA_ROUTE_STATIC] = 0; | |
573 | else | |
574 | rnh->filtered[ZEBRA_ROUTE_STATIC] = 1; | |
575 | } else | |
576 | rnh->filtered[ZEBRA_ROUTE_STATIC] = 0; | |
577 | ||
578 | /* Evaluate each static route associated with this nexthop. */ | |
579 | for (ALL_LIST_ELEMENTS_RO(rnh->zebra_static_route_list, node, | |
580 | static_rn)) { | |
581 | RNODE_FOREACH_RE(static_rn, sre) | |
582 | { | |
583 | if (sre->type != ZEBRA_ROUTE_STATIC) | |
584 | continue; | |
585 | ||
586 | /* Set the filter flag for the correct nexthop - static | |
587 | * route may | |
588 | * be having multiple. We care here only about | |
589 | * registered nexthops. | |
590 | */ | |
591 | for (nexthop = sre->nexthop; nexthop; | |
592 | nexthop = nexthop->next) { | |
593 | switch (nexthop->type) { | |
594 | case NEXTHOP_TYPE_IPV4: | |
595 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
596 | if (nexthop->gate.ipv4.s_addr | |
597 | == nrn->p.u.prefix4.s_addr) { | |
598 | if (num_resolving_nh) | |
599 | UNSET_FLAG( | |
600 | nexthop->flags, | |
601 | NEXTHOP_FLAG_FILTERED); | |
602 | else | |
603 | SET_FLAG( | |
604 | nexthop->flags, | |
605 | NEXTHOP_FLAG_FILTERED); | |
606 | } | |
607 | break; | |
608 | case NEXTHOP_TYPE_IPV6: | |
609 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
610 | ||
611 | if (memcmp(&nexthop->gate.ipv6, | |
612 | &nrn->p.u.prefix6, 16) | |
613 | == 0) { | |
614 | if (num_resolving_nh) | |
615 | UNSET_FLAG( | |
616 | nexthop->flags, | |
617 | NEXTHOP_FLAG_FILTERED); | |
618 | else | |
619 | SET_FLAG( | |
620 | nexthop->flags, | |
621 | NEXTHOP_FLAG_FILTERED); | |
622 | } | |
623 | break; | |
624 | default: | |
625 | break; | |
626 | } | |
627 | } | |
628 | ||
629 | if (IS_ZEBRA_DEBUG_NHT) { | |
630 | prefix2str(&static_rn->p, bufs, | |
631 | INET6_ADDRSTRLEN); | |
632 | if (prn && re) | |
633 | zlog_debug( | |
634 | "%u:%s: NH change %s, scheduling static route %s", | |
635 | vrfid, bufn, | |
636 | num_resolving_nh | |
637 | ? "" | |
638 | : "(filtered by route-map)", | |
639 | bufs); | |
640 | else | |
641 | zlog_debug( | |
642 | "%u:%s: NH unreachable, scheduling static route %s", | |
643 | vrfid, bufn, bufs); | |
644 | } | |
645 | ||
646 | SET_FLAG(sre->status, ROUTE_ENTRY_CHANGED); | |
647 | SET_FLAG(sre->status, ROUTE_ENTRY_NEXTHOPS_CHANGED); | |
648 | } | |
649 | ||
650 | rib_queue_add(static_rn); | |
651 | } | |
d50b5bdd | 652 | } |
078430f6 | 653 | |
731a75fe RW |
654 | static void zebra_rnh_process_pseudowires(vrf_id_t vrfid, struct rnh *rnh) |
655 | { | |
656 | struct zebra_pw *pw; | |
657 | struct listnode *node; | |
658 | ||
659 | for (ALL_LIST_ELEMENTS_RO(rnh->zebra_pseudowire_list, node, pw)) | |
660 | zebra_pw_update(pw); | |
661 | } | |
662 | ||
d50b5bdd | 663 | /* |
664 | * See if a tracked nexthop entry has undergone any change, and if so, | |
665 | * take appropriate action; this involves notifying any clients and/or | |
666 | * scheduling dependent static routes for processing. | |
667 | */ | |
d62a17ae | 668 | static void zebra_rnh_eval_nexthop_entry(vrf_id_t vrfid, int family, int force, |
669 | struct route_node *nrn, | |
670 | struct rnh *rnh, | |
671 | struct route_node *prn, | |
672 | struct route_entry *re) | |
d50b5bdd | 673 | { |
d62a17ae | 674 | int state_changed = 0; |
675 | ||
676 | /* If we're resolving over a different route, resolution has changed or | |
677 | * the resolving route has some change (e.g., metric), there is a state | |
678 | * change. | |
679 | */ | |
680 | if (!prefix_same(&rnh->resolved_route, &prn->p)) { | |
681 | if (prn) | |
682 | prefix_copy(&rnh->resolved_route, &prn->p); | |
683 | else | |
684 | memset(&rnh->resolved_route, 0, sizeof(struct prefix)); | |
685 | ||
686 | copy_state(rnh, re, nrn); | |
687 | state_changed = 1; | |
688 | } else if (compare_state(re, rnh->state)) { | |
689 | copy_state(rnh, re, nrn); | |
690 | state_changed = 1; | |
691 | } | |
692 | ||
693 | if (state_changed || force) { | |
694 | /* NOTE: Use the "copy" of resolving route stored in 'rnh' i.e., | |
695 | * rnh->state. | |
696 | */ | |
697 | /* Notify registered protocol clients. */ | |
698 | zebra_rnh_notify_protocol_clients(vrfid, family, nrn, rnh, prn, | |
699 | rnh->state); | |
700 | ||
701 | /* Process static routes attached to this nexthop */ | |
702 | zebra_rnh_process_static_routes(vrfid, family, nrn, rnh, prn, | |
703 | rnh->state); | |
731a75fe RW |
704 | |
705 | /* Process pseudowires attached to this nexthop */ | |
706 | zebra_rnh_process_pseudowires(vrfid, rnh); | |
d62a17ae | 707 | } |
d50b5bdd | 708 | } |
6e26278c | 709 | |
d50b5bdd | 710 | /* Evaluate one tracked entry */ |
d62a17ae | 711 | static void zebra_rnh_evaluate_entry(vrf_id_t vrfid, int family, int force, |
712 | rnh_type_t type, struct route_node *nrn) | |
d50b5bdd | 713 | { |
d62a17ae | 714 | struct rnh *rnh; |
715 | struct route_entry *re; | |
716 | struct route_node *prn; | |
717 | char bufn[INET6_ADDRSTRLEN]; | |
718 | ||
719 | if (IS_ZEBRA_DEBUG_NHT) { | |
720 | prefix2str(&nrn->p, bufn, INET6_ADDRSTRLEN); | |
721 | zlog_debug("%u:%s: Evaluate RNH, type %d %s", vrfid, bufn, type, | |
722 | force ? "(force)" : ""); | |
723 | } | |
724 | ||
725 | rnh = nrn->info; | |
726 | ||
727 | /* Identify route entry (RE) resolving this tracked entry. */ | |
728 | re = zebra_rnh_resolve_entry(vrfid, family, type, nrn, rnh, &prn); | |
729 | ||
730 | /* If the entry cannot be resolved and that is also the existing state, | |
731 | * there is nothing further to do. | |
732 | */ | |
733 | if (!re && rnh->state == NULL && !force) | |
734 | return; | |
735 | ||
736 | /* Process based on type of entry. */ | |
737 | if (type == RNH_IMPORT_CHECK_TYPE) | |
738 | zebra_rnh_eval_import_check_entry(vrfid, family, force, nrn, | |
739 | rnh, re); | |
740 | else | |
741 | zebra_rnh_eval_nexthop_entry(vrfid, family, force, nrn, rnh, | |
742 | prn, re); | |
d50b5bdd | 743 | } |
744 | ||
8ce5e6a3 | 745 | /* |
f0f77c9a DS |
746 | * Clear the ROUTE_ENTRY_NEXTHOPS_CHANGED flag |
747 | * from the re entries. | |
8ce5e6a3 DS |
748 | * |
749 | * Please note we are doing this *after* we have | |
750 | * notified the world about each nexthop as that | |
f0f77c9a | 751 | * we can have a situation where one re entry |
8ce5e6a3 DS |
752 | * covers multiple nexthops we are interested in. |
753 | */ | |
d62a17ae | 754 | static void zebra_rnh_clear_nhc_flag(vrf_id_t vrfid, int family, |
755 | rnh_type_t type, struct route_node *nrn) | |
8ce5e6a3 | 756 | { |
d62a17ae | 757 | struct rnh *rnh; |
758 | struct route_entry *re; | |
759 | struct route_node *prn; | |
8ce5e6a3 | 760 | |
d62a17ae | 761 | rnh = nrn->info; |
8ce5e6a3 | 762 | |
d62a17ae | 763 | re = zebra_rnh_resolve_entry(vrfid, family, type, nrn, rnh, &prn); |
8ce5e6a3 | 764 | |
332ad713 | 765 | if (re) { |
d62a17ae | 766 | UNSET_FLAG(re->status, ROUTE_ENTRY_NEXTHOPS_CHANGED); |
332ad713 RW |
767 | UNSET_FLAG(re->status, ROUTE_ENTRY_LABELS_CHANGED); |
768 | } | |
8ce5e6a3 | 769 | } |
d50b5bdd | 770 | |
771 | /* Evaluate all tracked entries (nexthops or routes for import into BGP) | |
772 | * of a particular VRF and address-family or a specific prefix. | |
773 | */ | |
d62a17ae | 774 | void zebra_evaluate_rnh(vrf_id_t vrfid, int family, int force, rnh_type_t type, |
775 | struct prefix *p) | |
d50b5bdd | 776 | { |
d62a17ae | 777 | struct route_table *rnh_table; |
778 | struct route_node *nrn; | |
779 | ||
780 | rnh_table = get_rnh_table(vrfid, family, type); | |
781 | if (!rnh_table) // unexpected | |
782 | return; | |
783 | ||
784 | if (p) { | |
785 | /* Evaluating a specific entry, make sure it exists. */ | |
786 | nrn = route_node_lookup(rnh_table, p); | |
787 | if (nrn && nrn->info) | |
788 | zebra_rnh_evaluate_entry(vrfid, family, force, type, | |
789 | nrn); | |
790 | ||
791 | if (nrn) | |
792 | route_unlock_node(nrn); | |
793 | } else { | |
794 | /* Evaluate entire table. */ | |
795 | nrn = route_top(rnh_table); | |
796 | while (nrn) { | |
797 | if (nrn->info) | |
798 | zebra_rnh_evaluate_entry(vrfid, family, force, | |
799 | type, nrn); | |
800 | nrn = route_next(nrn); /* this will also unlock nrn */ | |
801 | } | |
802 | nrn = route_top(rnh_table); | |
803 | while (nrn) { | |
804 | if (nrn->info) | |
805 | zebra_rnh_clear_nhc_flag(vrfid, family, type, | |
806 | nrn); | |
807 | nrn = route_next(nrn); /* this will also unlock nrn */ | |
808 | } | |
809 | } | |
fb018d25 DS |
810 | } |
811 | ||
d62a17ae | 812 | void zebra_print_rnh_table(vrf_id_t vrfid, int af, struct vty *vty, |
813 | rnh_type_t type) | |
fb018d25 | 814 | { |
d62a17ae | 815 | struct route_table *table; |
816 | struct route_node *rn; | |
817 | ||
818 | table = get_rnh_table(vrfid, af, type); | |
819 | if (!table) { | |
820 | zlog_debug("print_rnhs: rnh table not found\n"); | |
821 | return; | |
822 | } | |
823 | ||
824 | for (rn = route_top(table); rn; rn = route_next(rn)) | |
825 | if (rn->info) | |
826 | print_rnh(rn, vty); | |
fb018d25 DS |
827 | } |
828 | ||
d62a17ae | 829 | int zebra_cleanup_rnh_client(vrf_id_t vrf_id, int family, struct zserv *client, |
830 | rnh_type_t type) | |
fb018d25 | 831 | { |
d62a17ae | 832 | struct route_table *ntable; |
833 | struct route_node *nrn; | |
834 | struct rnh *rnh; | |
835 | ||
836 | if (IS_ZEBRA_DEBUG_NHT) | |
837 | zlog_debug("%u: Client %s RNH cleanup for family %d type %d", | |
838 | vrf_id, zebra_route_string(client->proto), family, | |
839 | type); | |
840 | ||
841 | ntable = get_rnh_table(vrf_id, family, type); | |
842 | if (!ntable) { | |
843 | zlog_debug("cleanup_rnh_client: rnh table not found\n"); | |
844 | return -1; | |
845 | } | |
846 | ||
847 | for (nrn = route_top(ntable); nrn; nrn = route_next(nrn)) { | |
848 | if (!nrn->info) | |
849 | continue; | |
850 | ||
851 | rnh = nrn->info; | |
852 | zebra_remove_rnh_client(rnh, client, type); | |
853 | } | |
854 | return 1; | |
fb018d25 DS |
855 | } |
856 | ||
857 | /** | |
f0f77c9a | 858 | * free_state - free up the re structure associated with the rnh. |
fb018d25 | 859 | */ |
d62a17ae | 860 | static void free_state(vrf_id_t vrf_id, struct route_entry *re, |
861 | struct route_node *rn) | |
fb018d25 | 862 | { |
fb018d25 | 863 | |
d62a17ae | 864 | if (!re) |
865 | return; | |
fb018d25 | 866 | |
d62a17ae | 867 | /* free RE and nexthops */ |
868 | zebra_deregister_rnh_static_nexthops(vrf_id, re->nexthop, rn); | |
869 | nexthops_free(re->nexthop); | |
870 | XFREE(MTYPE_RE, re); | |
fb018d25 DS |
871 | } |
872 | ||
d62a17ae | 873 | static void copy_state(struct rnh *rnh, struct route_entry *re, |
874 | struct route_node *rn) | |
fb018d25 | 875 | { |
d62a17ae | 876 | struct route_entry *state; |
fb018d25 | 877 | |
d62a17ae | 878 | if (rnh->state) { |
879 | free_state(rnh->vrf_id, rnh->state, rn); | |
880 | rnh->state = NULL; | |
881 | } | |
fb018d25 | 882 | |
d62a17ae | 883 | if (!re) |
884 | return; | |
fb018d25 | 885 | |
d62a17ae | 886 | state = XCALLOC(MTYPE_RE, sizeof(struct route_entry)); |
887 | state->type = re->type; | |
7733c6c4 | 888 | state->distance = re->distance; |
d62a17ae | 889 | state->metric = re->metric; |
fb018d25 | 890 | |
d62a17ae | 891 | route_entry_copy_nexthops(state, re->nexthop); |
892 | rnh->state = state; | |
fb018d25 DS |
893 | } |
894 | ||
d62a17ae | 895 | static int compare_state(struct route_entry *r1, struct route_entry *r2) |
fb018d25 | 896 | { |
fb018d25 | 897 | |
d62a17ae | 898 | if (!r1 && !r2) |
899 | return 0; | |
fb018d25 | 900 | |
d62a17ae | 901 | if ((!r1 && r2) || (r1 && !r2)) |
902 | return 1; | |
fb018d25 | 903 | |
7733c6c4 JB |
904 | if (r1->distance != r2->distance) |
905 | return 1; | |
906 | ||
d62a17ae | 907 | if (r1->metric != r2->metric) |
908 | return 1; | |
fb018d25 | 909 | |
d62a17ae | 910 | if (r1->nexthop_num != r2->nexthop_num) |
911 | return 1; | |
fb018d25 | 912 | |
332ad713 RW |
913 | if (CHECK_FLAG(r1->status, ROUTE_ENTRY_NEXTHOPS_CHANGED) |
914 | || CHECK_FLAG(r1->status, ROUTE_ENTRY_LABELS_CHANGED)) | |
d62a17ae | 915 | return 1; |
fb018d25 | 916 | |
d62a17ae | 917 | return 0; |
fb018d25 DS |
918 | } |
919 | ||
d62a17ae | 920 | static int send_client(struct rnh *rnh, struct zserv *client, rnh_type_t type, |
921 | vrf_id_t vrf_id) | |
fb018d25 | 922 | { |
d62a17ae | 923 | struct stream *s; |
924 | struct route_entry *re; | |
925 | unsigned long nump; | |
926 | u_char num; | |
927 | struct nexthop *nexthop; | |
928 | struct route_node *rn; | |
929 | int cmd = (type == RNH_IMPORT_CHECK_TYPE) ? ZEBRA_IMPORT_CHECK_UPDATE | |
930 | : ZEBRA_NEXTHOP_UPDATE; | |
931 | ||
932 | rn = rnh->node; | |
933 | re = rnh->state; | |
934 | ||
935 | /* Get output stream. */ | |
936 | s = client->obuf; | |
937 | stream_reset(s); | |
938 | ||
939 | zserv_create_header(s, cmd, vrf_id); | |
940 | ||
941 | stream_putw(s, rn->p.family); | |
942 | switch (rn->p.family) { | |
943 | case AF_INET: | |
944 | stream_putc(s, rn->p.prefixlen); | |
945 | stream_put_in_addr(s, &rn->p.u.prefix4); | |
fb018d25 | 946 | break; |
d62a17ae | 947 | case AF_INET6: |
948 | stream_putc(s, rn->p.prefixlen); | |
949 | stream_put(s, &rn->p.u.prefix6, IPV6_MAX_BYTELEN); | |
fb018d25 | 950 | break; |
d62a17ae | 951 | default: |
952 | zlog_err("%s: Unknown family (%d) notification attempted\n", | |
953 | __FUNCTION__, rn->p.family); | |
fb018d25 | 954 | break; |
d62a17ae | 955 | } |
956 | if (re) { | |
957 | stream_putc(s, re->distance); | |
958 | stream_putl(s, re->metric); | |
959 | num = 0; | |
960 | nump = stream_get_endp(s); | |
961 | stream_putc(s, 0); | |
962 | for (nexthop = re->nexthop; nexthop; nexthop = nexthop->next) | |
963 | if ((CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB) | |
964 | || CHECK_FLAG(nexthop->flags, | |
965 | NEXTHOP_FLAG_RECURSIVE)) | |
966 | && CHECK_FLAG(nexthop->flags, | |
967 | NEXTHOP_FLAG_ACTIVE)) { | |
968 | stream_putc(s, nexthop->type); | |
969 | switch (nexthop->type) { | |
970 | case NEXTHOP_TYPE_IPV4: | |
971 | stream_put_in_addr(s, | |
972 | &nexthop->gate.ipv4); | |
973 | stream_putl(s, nexthop->ifindex); | |
974 | break; | |
975 | case NEXTHOP_TYPE_IFINDEX: | |
976 | stream_putl(s, nexthop->ifindex); | |
977 | break; | |
978 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
979 | stream_put_in_addr(s, | |
980 | &nexthop->gate.ipv4); | |
981 | stream_putl(s, nexthop->ifindex); | |
982 | break; | |
983 | case NEXTHOP_TYPE_IPV6: | |
984 | stream_put(s, &nexthop->gate.ipv6, 16); | |
985 | stream_putl(s, nexthop->ifindex); | |
986 | break; | |
987 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
988 | stream_put(s, &nexthop->gate.ipv6, 16); | |
989 | stream_putl(s, nexthop->ifindex); | |
990 | break; | |
991 | default: | |
992 | /* do nothing */ | |
993 | break; | |
994 | } | |
995 | num++; | |
996 | } | |
997 | stream_putc_at(s, nump, num); | |
998 | } else { | |
999 | stream_putc(s, 0); // distance | |
1000 | stream_putl(s, 0); // metric | |
1001 | stream_putc(s, 0); // nexthops | |
1002 | } | |
1003 | stream_putw_at(s, 0, stream_get_endp(s)); | |
1004 | ||
1005 | client->nh_last_upd_time = monotime(NULL); | |
1006 | client->last_write_cmd = cmd; | |
1007 | return zebra_server_send_message(client); | |
fb018d25 DS |
1008 | } |
1009 | ||
d62a17ae | 1010 | static void print_nh(struct nexthop *nexthop, struct vty *vty) |
fb018d25 | 1011 | { |
d62a17ae | 1012 | char buf[BUFSIZ]; |
1013 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); | |
1014 | ||
1015 | switch (nexthop->type) { | |
1016 | case NEXTHOP_TYPE_IPV4: | |
1017 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
1018 | vty_out(vty, " via %s", inet_ntoa(nexthop->gate.ipv4)); | |
1019 | if (nexthop->ifindex) | |
1020 | vty_out(vty, ", %s", | |
1021 | ifindex2ifname_per_ns(zns, nexthop->ifindex)); | |
1022 | break; | |
1023 | case NEXTHOP_TYPE_IPV6: | |
1024 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1025 | vty_out(vty, " %s", | |
1026 | inet_ntop(AF_INET6, &nexthop->gate.ipv6, buf, BUFSIZ)); | |
1027 | if (nexthop->ifindex) | |
1028 | vty_out(vty, ", via %s", | |
1029 | ifindex2ifname_per_ns(zns, nexthop->ifindex)); | |
1030 | break; | |
1031 | case NEXTHOP_TYPE_IFINDEX: | |
1032 | vty_out(vty, " is directly connected, %s", | |
1033 | ifindex2ifname_per_ns(zns, nexthop->ifindex)); | |
1034 | break; | |
1035 | case NEXTHOP_TYPE_BLACKHOLE: | |
1036 | vty_out(vty, " is directly connected, Null0"); | |
1037 | break; | |
1038 | default: | |
1039 | break; | |
1040 | } | |
1041 | vty_out(vty, "\n"); | |
fb018d25 DS |
1042 | } |
1043 | ||
d62a17ae | 1044 | static void print_rnh(struct route_node *rn, struct vty *vty) |
fb018d25 | 1045 | { |
d62a17ae | 1046 | struct rnh *rnh; |
1047 | struct nexthop *nexthop; | |
1048 | struct listnode *node; | |
1049 | struct zserv *client; | |
1050 | char buf[BUFSIZ]; | |
1051 | ||
1052 | rnh = rn->info; | |
1053 | vty_out(vty, "%s%s\n", | |
1054 | inet_ntop(rn->p.family, &rn->p.u.prefix, buf, BUFSIZ), | |
1055 | CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED) ? "(Connected)" | |
1056 | : ""); | |
1057 | if (rnh->state) { | |
1058 | vty_out(vty, " resolved via %s\n", | |
1059 | zebra_route_string(rnh->state->type)); | |
1060 | for (nexthop = rnh->state->nexthop; nexthop; | |
1061 | nexthop = nexthop->next) | |
1062 | print_nh(nexthop, vty); | |
1063 | } else | |
1064 | vty_out(vty, " unresolved%s\n", | |
1065 | CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED) | |
1066 | ? "(Connected)" | |
1067 | : ""); | |
1068 | ||
1069 | vty_out(vty, " Client list:"); | |
1070 | for (ALL_LIST_ELEMENTS_RO(rnh->client_list, node, client)) | |
1071 | vty_out(vty, " %s(fd %d)%s", zebra_route_string(client->proto), | |
1072 | client->sock, | |
1073 | rnh->filtered[client->proto] ? "(filtered)" : ""); | |
1074 | if (!list_isempty(rnh->zebra_static_route_list)) | |
1075 | vty_out(vty, " zebra%s", | |
1076 | rnh->filtered[ZEBRA_ROUTE_STATIC] ? "(filtered)" : ""); | |
731a75fe RW |
1077 | if (!list_isempty(rnh->zebra_pseudowire_list)) |
1078 | vty_out(vty, " zebra[pseudowires]"); | |
d62a17ae | 1079 | vty_out(vty, "\n"); |
fb018d25 | 1080 | } |