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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 | * | |
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 | |
19 | */ | |
20 | ||
21 | #include <zebra.h> | |
22 | ||
23 | #include "prefix.h" | |
24 | #include "table.h" | |
25 | #include "memory.h" | |
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" | |
37 | #include "vrf.h" | |
38 | ||
39 | #include "zebra/rib.h" | |
40 | #include "zebra/rt.h" | |
41 | #include "zebra/zserv.h" | |
42 | #include "zebra/zebra_ns.h" | |
43 | #include "zebra/zebra_vrf.h" | |
44 | #include "zebra/redistribute.h" | |
45 | #include "zebra/debug.h" | |
46 | #include "zebra/zebra_rnh.h" | |
47 | #include "zebra/zebra_routemap.h" | |
48 | #include "zebra/interface.h" | |
49 | #include "zebra/zebra_memory.h" | |
50 | ||
51 | static void free_state(vrf_id_t vrf_id, struct route_entry *re, | |
52 | struct route_node *rn); | |
53 | static void copy_state(struct rnh *rnh, struct route_entry *re, | |
54 | struct route_node *rn); | |
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 | }) | |
64 | ||
65 | static int compare_state(struct route_entry *r1, struct route_entry *r2); | |
66 | static int send_client(struct rnh *rnh, struct zserv *client, rnh_type_t type, | |
67 | vrf_id_t vrf_id); | |
68 | static void print_rnh(struct route_node *rn, struct vty *vty); | |
69 | ||
70 | int zebra_rnh_ip_default_route = 0; | |
71 | int zebra_rnh_ipv6_default_route = 0; | |
72 | ||
73 | static inline struct route_table *get_rnh_table(vrf_id_t vrfid, int family, | |
74 | rnh_type_t type) | |
75 | { | |
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; | |
91 | } | |
92 | ||
93 | char *rnh_str(struct rnh *rnh, char *buf, int size) | |
94 | { | |
95 | prefix2str(&(rnh->node->p), buf, size); | |
96 | return buf; | |
97 | } | |
98 | ||
99 | struct rnh *zebra_add_rnh(struct prefix *p, vrf_id_t vrfid, rnh_type_t type) | |
100 | { | |
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(); | |
129 | rnh->zebra_pseudowire_list = list_new(); | |
130 | route_lock_node(rn); | |
131 | rn->info = rnh; | |
132 | rnh->node = rn; | |
133 | } | |
134 | ||
135 | route_unlock_node(rn); | |
136 | return (rn->info); | |
137 | } | |
138 | ||
139 | struct rnh *zebra_lookup_rnh(struct prefix *p, vrf_id_t vrfid, rnh_type_t type) | |
140 | { | |
141 | struct route_table *table; | |
142 | struct route_node *rn; | |
143 | ||
144 | table = get_rnh_table(vrfid, PREFIX_FAMILY(p), type); | |
145 | if (!table) | |
146 | return NULL; | |
147 | ||
148 | /* Make it sure prefixlen is applied to the prefix. */ | |
149 | apply_mask(p); | |
150 | ||
151 | /* Lookup route node.*/ | |
152 | rn = route_node_lookup(table, p); | |
153 | if (!rn) | |
154 | return NULL; | |
155 | ||
156 | route_unlock_node(rn); | |
157 | return (rn->info); | |
158 | } | |
159 | ||
160 | void zebra_free_rnh(struct rnh *rnh) | |
161 | { | |
162 | rnh->flags |= ZEBRA_NHT_DELETED; | |
163 | list_delete_and_null(&rnh->client_list); | |
164 | list_delete_and_null(&rnh->zebra_static_route_list); | |
165 | list_delete_and_null(&rnh->zebra_pseudowire_list); | |
166 | free_state(rnh->vrf_id, rnh->state, rnh->node); | |
167 | XFREE(MTYPE_RNH, rnh); | |
168 | } | |
169 | ||
170 | void zebra_delete_rnh(struct rnh *rnh, rnh_type_t type) | |
171 | { | |
172 | struct route_node *rn; | |
173 | ||
174 | if (!rnh || (rnh->flags & ZEBRA_NHT_DELETED) || !(rn = rnh->node)) | |
175 | return; | |
176 | ||
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 | } | |
182 | ||
183 | zebra_free_rnh(rnh); | |
184 | rn->info = NULL; | |
185 | route_unlock_node(rn); | |
186 | } | |
187 | ||
188 | void zebra_add_rnh_client(struct rnh *rnh, struct zserv *client, | |
189 | rnh_type_t type, vrf_id_t vrf_id) | |
190 | { | |
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 | } | |
202 | } | |
203 | ||
204 | void zebra_remove_rnh_client(struct rnh *rnh, struct zserv *client, | |
205 | rnh_type_t type) | |
206 | { | |
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) | |
215 | && list_isempty(rnh->zebra_static_route_list) | |
216 | && list_isempty(rnh->zebra_pseudowire_list)) | |
217 | zebra_delete_rnh(rnh, type); | |
218 | } | |
219 | ||
220 | void zebra_register_rnh_static_nh(vrf_id_t vrf_id, struct prefix *nh, | |
221 | struct route_node *static_rn) | |
222 | { | |
223 | struct rnh *rnh; | |
224 | ||
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 | } | |
229 | } | |
230 | ||
231 | void zebra_deregister_rnh_static_nh(vrf_id_t vrf_id, struct prefix *nh, | |
232 | struct route_node *static_rn) | |
233 | { | |
234 | struct rnh *rnh; | |
235 | ||
236 | rnh = zebra_lookup_rnh(nh, vrf_id, RNH_NEXTHOP_TYPE); | |
237 | if (!rnh || (rnh->flags & ZEBRA_NHT_DELETED)) | |
238 | return; | |
239 | ||
240 | listnode_delete(rnh->zebra_static_route_list, static_rn); | |
241 | ||
242 | if (list_isempty(rnh->client_list) | |
243 | && list_isempty(rnh->zebra_static_route_list) | |
244 | && list_isempty(rnh->zebra_pseudowire_list)) | |
245 | zebra_delete_rnh(rnh, RNH_NEXTHOP_TYPE); | |
246 | } | |
247 | ||
248 | void zebra_deregister_rnh_static_nexthops(vrf_id_t vrf_id, | |
249 | struct nexthop *nexthop, | |
250 | struct route_node *rn) | |
251 | { | |
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 | } | |
289 | } | |
290 | ||
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 | memset(prefix, 0, sizeof(*prefix)); | |
308 | zlog_warn("%s: unknown address family %d", __func__, af); | |
309 | break; | |
310 | } | |
311 | } | |
312 | ||
313 | void zebra_register_rnh_pseudowire(vrf_id_t vrf_id, struct zebra_pw *pw) | |
314 | { | |
315 | struct prefix nh; | |
316 | struct rnh *rnh; | |
317 | ||
318 | addr2hostprefix(pw->af, &pw->nexthop, &nh); | |
319 | rnh = zebra_add_rnh(&nh, vrf_id, RNH_NEXTHOP_TYPE); | |
320 | if (rnh && !listnode_lookup(rnh->zebra_pseudowire_list, pw)) { | |
321 | listnode_add(rnh->zebra_pseudowire_list, pw); | |
322 | pw->rnh = rnh; | |
323 | zebra_evaluate_rnh(vrf_id, pw->af, 1, RNH_NEXTHOP_TYPE, &nh); | |
324 | } | |
325 | } | |
326 | ||
327 | void zebra_deregister_rnh_pseudowire(vrf_id_t vrf_id, struct zebra_pw *pw) | |
328 | { | |
329 | struct rnh *rnh; | |
330 | ||
331 | rnh = pw->rnh; | |
332 | if (!rnh) | |
333 | return; | |
334 | ||
335 | listnode_delete(rnh->zebra_pseudowire_list, pw); | |
336 | pw->rnh = NULL; | |
337 | ||
338 | if (list_isempty(rnh->client_list) | |
339 | && list_isempty(rnh->zebra_static_route_list) | |
340 | && list_isempty(rnh->zebra_pseudowire_list)) | |
341 | zebra_delete_rnh(rnh, RNH_NEXTHOP_TYPE); | |
342 | } | |
343 | ||
344 | /* Apply the NHT route-map for a client to the route (and nexthops) | |
345 | * resolving a NH. | |
346 | */ | |
347 | static int zebra_rnh_apply_nht_rmap(int family, struct route_node *prn, | |
348 | struct route_entry *re, int proto) | |
349 | { | |
350 | int at_least_one = 0; | |
351 | int rmap_family; /* Route map has diff AF family enum */ | |
352 | struct nexthop *nexthop; | |
353 | int ret; | |
354 | ||
355 | rmap_family = (family == AF_INET) ? AFI_IP : AFI_IP6; | |
356 | ||
357 | if (prn && re) { | |
358 | for (nexthop = re->ng.nexthop; nexthop; | |
359 | nexthop = nexthop->next) { | |
360 | ret = zebra_nht_route_map_check(rmap_family, proto, | |
361 | &prn->p, re, nexthop); | |
362 | if (ret != RMAP_DENYMATCH) { | |
363 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
364 | at_least_one++; /* at least one valid NH */ | |
365 | } else { | |
366 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
367 | } | |
368 | } | |
369 | } | |
370 | return (at_least_one); | |
371 | } | |
372 | ||
373 | /* | |
374 | * Determine appropriate route (RE entry) resolving a tracked BGP route | |
375 | * for BGP route for import. | |
376 | */ | |
377 | static struct route_entry * | |
378 | zebra_rnh_resolve_import_entry(vrf_id_t vrfid, int family, | |
379 | struct route_node *nrn, struct rnh *rnh, | |
380 | struct route_node **prn) | |
381 | { | |
382 | struct route_table *route_table; | |
383 | struct route_node *rn; | |
384 | struct route_entry *re; | |
385 | ||
386 | *prn = NULL; | |
387 | ||
388 | route_table = zebra_vrf_table(family2afi(family), SAFI_UNICAST, vrfid); | |
389 | if (!route_table) // unexpected | |
390 | return NULL; | |
391 | ||
392 | rn = route_node_match(route_table, &nrn->p); | |
393 | if (!rn) | |
394 | return NULL; | |
395 | ||
396 | /* Unlock route node - we don't need to lock when walking the tree. */ | |
397 | route_unlock_node(rn); | |
398 | ||
399 | if (CHECK_FLAG(rnh->flags, ZEBRA_NHT_EXACT_MATCH) | |
400 | && !prefix_same(&nrn->p, &rn->p)) | |
401 | return NULL; | |
402 | ||
403 | /* Identify appropriate route entry. */ | |
404 | RNODE_FOREACH_RE (rn, re) { | |
405 | if (!CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED) | |
406 | && CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED) | |
407 | && (re->type != ZEBRA_ROUTE_BGP)) | |
408 | break; | |
409 | } | |
410 | ||
411 | if (re) | |
412 | *prn = rn; | |
413 | return re; | |
414 | } | |
415 | ||
416 | /* | |
417 | * See if a tracked route entry for import (by BGP) has undergone any | |
418 | * change, and if so, notify the client. | |
419 | */ | |
420 | static void zebra_rnh_eval_import_check_entry(vrf_id_t vrfid, int family, | |
421 | int force, struct route_node *nrn, | |
422 | struct rnh *rnh, | |
423 | struct route_entry *re) | |
424 | { | |
425 | int state_changed = 0; | |
426 | struct zserv *client; | |
427 | char bufn[INET6_ADDRSTRLEN]; | |
428 | struct listnode *node; | |
429 | struct nexthop *nexthop; | |
430 | ||
431 | if (re && (rnh->state == NULL)) { | |
432 | for (ALL_NEXTHOPS(re->ng, nexthop)) | |
433 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) { | |
434 | state_changed = 1; | |
435 | break; | |
436 | } | |
437 | } else if (!re && (rnh->state != NULL)) | |
438 | state_changed = 1; | |
439 | ||
440 | if (compare_state(re, rnh->state)) | |
441 | copy_state(rnh, re, nrn); | |
442 | ||
443 | if (state_changed || force) { | |
444 | if (IS_ZEBRA_DEBUG_NHT) { | |
445 | prefix2str(&nrn->p, bufn, INET6_ADDRSTRLEN); | |
446 | zlog_debug("%u:%s: Route import check %s %s\n", vrfid, | |
447 | bufn, rnh->state ? "passed" : "failed", | |
448 | state_changed ? "(state changed)" : ""); | |
449 | } | |
450 | /* state changed, notify clients */ | |
451 | for (ALL_LIST_ELEMENTS_RO(rnh->client_list, node, client)) { | |
452 | send_client(rnh, client, RNH_IMPORT_CHECK_TYPE, vrfid); | |
453 | } | |
454 | } | |
455 | } | |
456 | ||
457 | /* | |
458 | * Notify clients registered for this nexthop about a change. | |
459 | */ | |
460 | static void zebra_rnh_notify_protocol_clients(vrf_id_t vrfid, int family, | |
461 | struct route_node *nrn, | |
462 | struct rnh *rnh, | |
463 | struct route_node *prn, | |
464 | struct route_entry *re) | |
465 | { | |
466 | struct listnode *node; | |
467 | struct zserv *client; | |
468 | char bufn[INET6_ADDRSTRLEN]; | |
469 | char bufp[INET6_ADDRSTRLEN]; | |
470 | int num_resolving_nh; | |
471 | ||
472 | if (IS_ZEBRA_DEBUG_NHT) { | |
473 | prefix2str(&nrn->p, bufn, INET6_ADDRSTRLEN); | |
474 | if (prn && re) { | |
475 | prefix2str(&prn->p, bufp, INET6_ADDRSTRLEN); | |
476 | zlog_debug("%u:%s: NH resolved over route %s", vrfid, | |
477 | bufn, bufp); | |
478 | } else | |
479 | zlog_debug("%u:%s: NH has become unresolved", vrfid, | |
480 | bufn); | |
481 | } | |
482 | ||
483 | for (ALL_LIST_ELEMENTS_RO(rnh->client_list, node, client)) { | |
484 | if (prn && re) { | |
485 | /* Apply route-map for this client to route resolving | |
486 | * this | |
487 | * nexthop to see if it is filtered or not. | |
488 | */ | |
489 | num_resolving_nh = zebra_rnh_apply_nht_rmap( | |
490 | family, prn, re, client->proto); | |
491 | if (num_resolving_nh) | |
492 | rnh->filtered[client->proto] = 0; | |
493 | else | |
494 | rnh->filtered[client->proto] = 1; | |
495 | ||
496 | if (IS_ZEBRA_DEBUG_NHT) | |
497 | zlog_debug( | |
498 | "%u:%s: Notifying client %s about NH %s", | |
499 | vrfid, bufn, | |
500 | zebra_route_string(client->proto), | |
501 | num_resolving_nh | |
502 | ? "" | |
503 | : "(filtered by route-map)"); | |
504 | } else { | |
505 | rnh->filtered[client->proto] = 0; | |
506 | if (IS_ZEBRA_DEBUG_NHT) | |
507 | zlog_debug( | |
508 | "%u:%s: Notifying client %s about NH (unreachable)", | |
509 | vrfid, bufn, | |
510 | zebra_route_string(client->proto)); | |
511 | } | |
512 | ||
513 | send_client(rnh, client, RNH_NEXTHOP_TYPE, vrfid); | |
514 | } | |
515 | } | |
516 | ||
517 | static void zebra_rnh_process_static_routes(vrf_id_t vrfid, int family, | |
518 | struct route_node *nrn, | |
519 | struct rnh *rnh, | |
520 | struct route_node *prn, | |
521 | struct route_entry *re) | |
522 | { | |
523 | struct listnode *node; | |
524 | int num_resolving_nh = 0; | |
525 | struct route_node *static_rn; | |
526 | struct route_entry *sre; | |
527 | struct nexthop *nexthop; | |
528 | char bufn[INET6_ADDRSTRLEN]; | |
529 | char bufp[INET6_ADDRSTRLEN]; | |
530 | char bufs[INET6_ADDRSTRLEN]; | |
531 | ||
532 | if (IS_ZEBRA_DEBUG_NHT) { | |
533 | prefix2str(&nrn->p, bufn, INET6_ADDRSTRLEN); | |
534 | if (prn) | |
535 | prefix2str(&prn->p, bufp, INET6_ADDRSTRLEN); | |
536 | } | |
537 | ||
538 | if (prn && re) { | |
539 | /* Apply route-map for "static" to route resolving this | |
540 | * nexthop to see if it is filtered or not. | |
541 | */ | |
542 | num_resolving_nh = zebra_rnh_apply_nht_rmap(family, prn, re, | |
543 | ZEBRA_ROUTE_STATIC); | |
544 | if (num_resolving_nh) | |
545 | rnh->filtered[ZEBRA_ROUTE_STATIC] = 0; | |
546 | else | |
547 | rnh->filtered[ZEBRA_ROUTE_STATIC] = 1; | |
548 | } else | |
549 | rnh->filtered[ZEBRA_ROUTE_STATIC] = 0; | |
550 | ||
551 | /* Evaluate each static route associated with this nexthop. */ | |
552 | for (ALL_LIST_ELEMENTS_RO(rnh->zebra_static_route_list, node, | |
553 | static_rn)) { | |
554 | RNODE_FOREACH_RE (static_rn, sre) { | |
555 | if (sre->type != ZEBRA_ROUTE_STATIC) | |
556 | continue; | |
557 | ||
558 | /* Set the filter flag for the correct nexthop - static | |
559 | * route may | |
560 | * be having multiple. We care here only about | |
561 | * registered nexthops. | |
562 | */ | |
563 | for (nexthop = sre->ng.nexthop; nexthop; | |
564 | nexthop = nexthop->next) { | |
565 | switch (nexthop->type) { | |
566 | case NEXTHOP_TYPE_IPV4: | |
567 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
568 | if (nexthop->gate.ipv4.s_addr | |
569 | == nrn->p.u.prefix4.s_addr) { | |
570 | if (num_resolving_nh) | |
571 | UNSET_FLAG( | |
572 | nexthop->flags, | |
573 | NEXTHOP_FLAG_FILTERED); | |
574 | else | |
575 | SET_FLAG( | |
576 | nexthop->flags, | |
577 | NEXTHOP_FLAG_FILTERED); | |
578 | } | |
579 | break; | |
580 | case NEXTHOP_TYPE_IPV6: | |
581 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
582 | ||
583 | if (memcmp(&nexthop->gate.ipv6, | |
584 | &nrn->p.u.prefix6, 16) | |
585 | == 0) { | |
586 | if (num_resolving_nh) | |
587 | UNSET_FLAG( | |
588 | nexthop->flags, | |
589 | NEXTHOP_FLAG_FILTERED); | |
590 | else | |
591 | SET_FLAG( | |
592 | nexthop->flags, | |
593 | NEXTHOP_FLAG_FILTERED); | |
594 | } | |
595 | break; | |
596 | default: | |
597 | break; | |
598 | } | |
599 | } | |
600 | ||
601 | if (IS_ZEBRA_DEBUG_NHT) { | |
602 | prefix2str(&static_rn->p, bufs, | |
603 | INET6_ADDRSTRLEN); | |
604 | if (prn && re) | |
605 | zlog_debug( | |
606 | "%u:%s: NH change %s, scheduling static route %s", | |
607 | vrfid, bufn, | |
608 | num_resolving_nh | |
609 | ? "" | |
610 | : "(filtered by route-map)", | |
611 | bufs); | |
612 | else | |
613 | zlog_debug( | |
614 | "%u:%s: NH unreachable, scheduling static route %s", | |
615 | vrfid, bufn, bufs); | |
616 | } | |
617 | ||
618 | SET_FLAG(sre->status, ROUTE_ENTRY_CHANGED); | |
619 | SET_FLAG(sre->status, ROUTE_ENTRY_NEXTHOPS_CHANGED); | |
620 | } | |
621 | ||
622 | rib_queue_add(static_rn); | |
623 | } | |
624 | } | |
625 | ||
626 | /* | |
627 | * Determine appropriate route (route entry) resolving a tracked | |
628 | * nexthop. | |
629 | */ | |
630 | static struct route_entry * | |
631 | zebra_rnh_resolve_nexthop_entry(vrf_id_t vrfid, int family, | |
632 | struct route_node *nrn, struct rnh *rnh, | |
633 | struct route_node **prn) | |
634 | { | |
635 | struct route_table *route_table; | |
636 | struct route_node *rn; | |
637 | struct route_entry *re; | |
638 | ||
639 | *prn = NULL; | |
640 | ||
641 | route_table = zebra_vrf_table(family2afi(family), SAFI_UNICAST, vrfid); | |
642 | if (!route_table) | |
643 | return NULL; | |
644 | ||
645 | rn = route_node_match(route_table, &nrn->p); | |
646 | if (!rn) | |
647 | return NULL; | |
648 | ||
649 | /* Unlock route node - we don't need to lock when walking the tree. */ | |
650 | route_unlock_node(rn); | |
651 | ||
652 | /* While resolving nexthops, we may need to walk up the tree from the | |
653 | * most-specific match. Do similar logic as in zebra_rib.c | |
654 | */ | |
655 | while (rn) { | |
656 | /* Do not resolve over default route unless allowed && | |
657 | * match route to be exact if so specified | |
658 | */ | |
659 | if (is_default_prefix(&rn->p) | |
660 | && !rnh_resolve_via_default(rn->p.family)) | |
661 | return NULL; | |
662 | ||
663 | /* Identify appropriate route entry. */ | |
664 | RNODE_FOREACH_RE (rn, re) { | |
665 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) | |
666 | continue; | |
667 | if (!CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED)) | |
668 | continue; | |
669 | ||
670 | if (CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED)) { | |
671 | if ((re->type == ZEBRA_ROUTE_CONNECT) | |
672 | || (re->type == ZEBRA_ROUTE_STATIC)) | |
673 | break; | |
674 | if (re->type == ZEBRA_ROUTE_NHRP) { | |
675 | struct nexthop *nexthop; | |
676 | ||
677 | for (nexthop = re->ng.nexthop; nexthop; | |
678 | nexthop = nexthop->next) | |
679 | if (nexthop->type | |
680 | == NEXTHOP_TYPE_IFINDEX) | |
681 | break; | |
682 | if (nexthop) | |
683 | break; | |
684 | } | |
685 | } else | |
686 | break; | |
687 | } | |
688 | ||
689 | /* Route entry found, we're done; else, walk up the tree. */ | |
690 | if (re) { | |
691 | *prn = rn; | |
692 | return re; | |
693 | } | |
694 | ||
695 | if (CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED)) | |
696 | rn = rn->parent; | |
697 | else | |
698 | return NULL; | |
699 | } | |
700 | ||
701 | return NULL; | |
702 | } | |
703 | ||
704 | static void zebra_rnh_process_pseudowires(vrf_id_t vrfid, struct rnh *rnh) | |
705 | { | |
706 | struct zebra_pw *pw; | |
707 | struct listnode *node; | |
708 | ||
709 | for (ALL_LIST_ELEMENTS_RO(rnh->zebra_pseudowire_list, node, pw)) | |
710 | zebra_pw_update(pw); | |
711 | } | |
712 | ||
713 | /* | |
714 | * See if a tracked nexthop entry has undergone any change, and if so, | |
715 | * take appropriate action; this involves notifying any clients and/or | |
716 | * scheduling dependent static routes for processing. | |
717 | */ | |
718 | static void zebra_rnh_eval_nexthop_entry(vrf_id_t vrfid, int family, int force, | |
719 | struct route_node *nrn, | |
720 | struct rnh *rnh, | |
721 | struct route_node *prn, | |
722 | struct route_entry *re) | |
723 | { | |
724 | int state_changed = 0; | |
725 | ||
726 | /* If we're resolving over a different route, resolution has changed or | |
727 | * the resolving route has some change (e.g., metric), there is a state | |
728 | * change. | |
729 | */ | |
730 | if (!prefix_same(&rnh->resolved_route, &prn->p)) { | |
731 | if (prn) | |
732 | prefix_copy(&rnh->resolved_route, &prn->p); | |
733 | else | |
734 | memset(&rnh->resolved_route, 0, sizeof(struct prefix)); | |
735 | ||
736 | copy_state(rnh, re, nrn); | |
737 | state_changed = 1; | |
738 | } else if (compare_state(re, rnh->state)) { | |
739 | copy_state(rnh, re, nrn); | |
740 | state_changed = 1; | |
741 | } | |
742 | ||
743 | if (state_changed || force) { | |
744 | /* NOTE: Use the "copy" of resolving route stored in 'rnh' i.e., | |
745 | * rnh->state. | |
746 | */ | |
747 | /* Notify registered protocol clients. */ | |
748 | zebra_rnh_notify_protocol_clients(vrfid, family, nrn, rnh, prn, | |
749 | rnh->state); | |
750 | ||
751 | /* Process static routes attached to this nexthop */ | |
752 | zebra_rnh_process_static_routes(vrfid, family, nrn, rnh, prn, | |
753 | rnh->state); | |
754 | ||
755 | /* Process pseudowires attached to this nexthop */ | |
756 | zebra_rnh_process_pseudowires(vrfid, rnh); | |
757 | } | |
758 | } | |
759 | ||
760 | /* Evaluate one tracked entry */ | |
761 | static void zebra_rnh_evaluate_entry(vrf_id_t vrfid, int family, int force, | |
762 | rnh_type_t type, struct route_node *nrn) | |
763 | { | |
764 | struct rnh *rnh; | |
765 | struct route_entry *re; | |
766 | struct route_node *prn; | |
767 | char bufn[INET6_ADDRSTRLEN]; | |
768 | ||
769 | if (IS_ZEBRA_DEBUG_NHT) { | |
770 | prefix2str(&nrn->p, bufn, INET6_ADDRSTRLEN); | |
771 | zlog_debug("%u:%s: Evaluate RNH, type %d %s", vrfid, bufn, type, | |
772 | force ? "(force)" : ""); | |
773 | } | |
774 | ||
775 | rnh = nrn->info; | |
776 | ||
777 | /* Identify route entry (RE) resolving this tracked entry. */ | |
778 | if (type == RNH_IMPORT_CHECK_TYPE) | |
779 | re = zebra_rnh_resolve_import_entry(vrfid, family, nrn, rnh, | |
780 | &prn); | |
781 | else | |
782 | re = zebra_rnh_resolve_nexthop_entry(vrfid, family, nrn, rnh, | |
783 | &prn); | |
784 | ||
785 | /* If the entry cannot be resolved and that is also the existing state, | |
786 | * there is nothing further to do. | |
787 | */ | |
788 | if (!re && rnh->state == NULL && !force) | |
789 | return; | |
790 | ||
791 | /* Process based on type of entry. */ | |
792 | if (type == RNH_IMPORT_CHECK_TYPE) | |
793 | zebra_rnh_eval_import_check_entry(vrfid, family, force, nrn, | |
794 | rnh, re); | |
795 | else | |
796 | zebra_rnh_eval_nexthop_entry(vrfid, family, force, nrn, rnh, | |
797 | prn, re); | |
798 | } | |
799 | ||
800 | /* | |
801 | * Clear the ROUTE_ENTRY_NEXTHOPS_CHANGED flag | |
802 | * from the re entries. | |
803 | * | |
804 | * Please note we are doing this *after* we have | |
805 | * notified the world about each nexthop as that | |
806 | * we can have a situation where one re entry | |
807 | * covers multiple nexthops we are interested in. | |
808 | */ | |
809 | static void zebra_rnh_clear_nhc_flag(vrf_id_t vrfid, int family, | |
810 | rnh_type_t type, struct route_node *nrn) | |
811 | { | |
812 | struct rnh *rnh; | |
813 | struct route_entry *re; | |
814 | struct route_node *prn; | |
815 | ||
816 | rnh = nrn->info; | |
817 | ||
818 | /* Identify route entry (RIB) resolving this tracked entry. */ | |
819 | if (type == RNH_IMPORT_CHECK_TYPE) | |
820 | re = zebra_rnh_resolve_import_entry(vrfid, family, nrn, rnh, | |
821 | &prn); | |
822 | else | |
823 | re = zebra_rnh_resolve_nexthop_entry(vrfid, family, nrn, rnh, | |
824 | &prn); | |
825 | ||
826 | if (re) { | |
827 | UNSET_FLAG(re->status, ROUTE_ENTRY_NEXTHOPS_CHANGED); | |
828 | UNSET_FLAG(re->status, ROUTE_ENTRY_LABELS_CHANGED); | |
829 | } | |
830 | } | |
831 | ||
832 | /* Evaluate all tracked entries (nexthops or routes for import into BGP) | |
833 | * of a particular VRF and address-family or a specific prefix. | |
834 | */ | |
835 | void zebra_evaluate_rnh(vrf_id_t vrfid, int family, int force, rnh_type_t type, | |
836 | struct prefix *p) | |
837 | { | |
838 | struct route_table *rnh_table; | |
839 | struct route_node *nrn; | |
840 | ||
841 | rnh_table = get_rnh_table(vrfid, family, type); | |
842 | if (!rnh_table) // unexpected | |
843 | return; | |
844 | ||
845 | if (p) { | |
846 | /* Evaluating a specific entry, make sure it exists. */ | |
847 | nrn = route_node_lookup(rnh_table, p); | |
848 | if (nrn && nrn->info) | |
849 | zebra_rnh_evaluate_entry(vrfid, family, force, type, | |
850 | nrn); | |
851 | ||
852 | if (nrn) | |
853 | route_unlock_node(nrn); | |
854 | } else { | |
855 | /* Evaluate entire table. */ | |
856 | nrn = route_top(rnh_table); | |
857 | while (nrn) { | |
858 | if (nrn->info) | |
859 | zebra_rnh_evaluate_entry(vrfid, family, force, | |
860 | type, nrn); | |
861 | nrn = route_next(nrn); /* this will also unlock nrn */ | |
862 | } | |
863 | nrn = route_top(rnh_table); | |
864 | while (nrn) { | |
865 | if (nrn->info) | |
866 | zebra_rnh_clear_nhc_flag(vrfid, family, type, | |
867 | nrn); | |
868 | nrn = route_next(nrn); /* this will also unlock nrn */ | |
869 | } | |
870 | } | |
871 | } | |
872 | ||
873 | void zebra_print_rnh_table(vrf_id_t vrfid, int af, struct vty *vty, | |
874 | rnh_type_t type) | |
875 | { | |
876 | struct route_table *table; | |
877 | struct route_node *rn; | |
878 | ||
879 | table = get_rnh_table(vrfid, af, type); | |
880 | if (!table) { | |
881 | zlog_debug("print_rnhs: rnh table not found\n"); | |
882 | return; | |
883 | } | |
884 | ||
885 | for (rn = route_top(table); rn; rn = route_next(rn)) | |
886 | if (rn->info) | |
887 | print_rnh(rn, vty); | |
888 | } | |
889 | ||
890 | int zebra_cleanup_rnh_client(vrf_id_t vrf_id, int family, struct zserv *client, | |
891 | rnh_type_t type) | |
892 | { | |
893 | struct route_table *ntable; | |
894 | struct route_node *nrn; | |
895 | struct rnh *rnh; | |
896 | ||
897 | if (IS_ZEBRA_DEBUG_NHT) | |
898 | zlog_debug("%u: Client %s RNH cleanup for family %d type %d", | |
899 | vrf_id, zebra_route_string(client->proto), family, | |
900 | type); | |
901 | ||
902 | ntable = get_rnh_table(vrf_id, family, type); | |
903 | if (!ntable) { | |
904 | zlog_debug("cleanup_rnh_client: rnh table not found\n"); | |
905 | return -1; | |
906 | } | |
907 | ||
908 | for (nrn = route_top(ntable); nrn; nrn = route_next(nrn)) { | |
909 | if (!nrn->info) | |
910 | continue; | |
911 | ||
912 | rnh = nrn->info; | |
913 | zebra_remove_rnh_client(rnh, client, type); | |
914 | } | |
915 | return 1; | |
916 | } | |
917 | ||
918 | /** | |
919 | * free_state - free up the re structure associated with the rnh. | |
920 | */ | |
921 | static void free_state(vrf_id_t vrf_id, struct route_entry *re, | |
922 | struct route_node *rn) | |
923 | { | |
924 | ||
925 | if (!re) | |
926 | return; | |
927 | ||
928 | /* free RE and nexthops */ | |
929 | zebra_deregister_rnh_static_nexthops(vrf_id, re->ng.nexthop, rn); | |
930 | nexthops_free(re->ng.nexthop); | |
931 | XFREE(MTYPE_RE, re); | |
932 | } | |
933 | ||
934 | static void copy_state(struct rnh *rnh, struct route_entry *re, | |
935 | struct route_node *rn) | |
936 | { | |
937 | struct route_entry *state; | |
938 | ||
939 | if (rnh->state) { | |
940 | free_state(rnh->vrf_id, rnh->state, rn); | |
941 | rnh->state = NULL; | |
942 | } | |
943 | ||
944 | if (!re) | |
945 | return; | |
946 | ||
947 | state = XCALLOC(MTYPE_RE, sizeof(struct route_entry)); | |
948 | state->type = re->type; | |
949 | state->distance = re->distance; | |
950 | state->metric = re->metric; | |
951 | state->vrf_id = re->vrf_id; | |
952 | ||
953 | route_entry_copy_nexthops(state, re->ng.nexthop); | |
954 | rnh->state = state; | |
955 | } | |
956 | ||
957 | static int compare_state(struct route_entry *r1, struct route_entry *r2) | |
958 | { | |
959 | ||
960 | if (!r1 && !r2) | |
961 | return 0; | |
962 | ||
963 | if ((!r1 && r2) || (r1 && !r2)) | |
964 | return 1; | |
965 | ||
966 | if (r1->distance != r2->distance) | |
967 | return 1; | |
968 | ||
969 | if (r1->metric != r2->metric) | |
970 | return 1; | |
971 | ||
972 | if (r1->nexthop_num != r2->nexthop_num) | |
973 | return 1; | |
974 | ||
975 | if (CHECK_FLAG(r1->status, ROUTE_ENTRY_NEXTHOPS_CHANGED) | |
976 | || CHECK_FLAG(r1->status, ROUTE_ENTRY_LABELS_CHANGED)) | |
977 | return 1; | |
978 | ||
979 | return 0; | |
980 | } | |
981 | ||
982 | static int send_client(struct rnh *rnh, struct zserv *client, rnh_type_t type, | |
983 | vrf_id_t vrf_id) | |
984 | { | |
985 | struct stream *s; | |
986 | struct route_entry *re; | |
987 | unsigned long nump; | |
988 | u_char num; | |
989 | struct nexthop *nexthop; | |
990 | struct route_node *rn; | |
991 | int cmd = (type == RNH_IMPORT_CHECK_TYPE) ? ZEBRA_IMPORT_CHECK_UPDATE | |
992 | : ZEBRA_NEXTHOP_UPDATE; | |
993 | ||
994 | rn = rnh->node; | |
995 | re = rnh->state; | |
996 | ||
997 | /* Get output stream. */ | |
998 | s = stream_new(ZEBRA_MAX_PACKET_SIZ); | |
999 | ||
1000 | zclient_create_header(s, cmd, vrf_id); | |
1001 | ||
1002 | stream_putw(s, rn->p.family); | |
1003 | switch (rn->p.family) { | |
1004 | case AF_INET: | |
1005 | stream_putc(s, rn->p.prefixlen); | |
1006 | stream_put_in_addr(s, &rn->p.u.prefix4); | |
1007 | break; | |
1008 | case AF_INET6: | |
1009 | stream_putc(s, rn->p.prefixlen); | |
1010 | stream_put(s, &rn->p.u.prefix6, IPV6_MAX_BYTELEN); | |
1011 | break; | |
1012 | default: | |
1013 | zlog_err("%s: Unknown family (%d) notification attempted\n", | |
1014 | __FUNCTION__, rn->p.family); | |
1015 | break; | |
1016 | } | |
1017 | if (re) { | |
1018 | stream_putc(s, re->type); | |
1019 | stream_putw(s, re->instance); | |
1020 | stream_putc(s, re->distance); | |
1021 | stream_putl(s, re->metric); | |
1022 | num = 0; | |
1023 | nump = stream_get_endp(s); | |
1024 | stream_putc(s, 0); | |
1025 | for (nexthop = re->ng.nexthop; nexthop; nexthop = nexthop->next) | |
1026 | if ((CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB) | |
1027 | || CHECK_FLAG(nexthop->flags, | |
1028 | NEXTHOP_FLAG_RECURSIVE)) | |
1029 | && CHECK_FLAG(nexthop->flags, | |
1030 | NEXTHOP_FLAG_ACTIVE)) { | |
1031 | stream_putc(s, nexthop->type); | |
1032 | switch (nexthop->type) { | |
1033 | case NEXTHOP_TYPE_IPV4: | |
1034 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
1035 | stream_put_in_addr(s, | |
1036 | &nexthop->gate.ipv4); | |
1037 | stream_putl(s, nexthop->ifindex); | |
1038 | break; | |
1039 | case NEXTHOP_TYPE_IFINDEX: | |
1040 | stream_putl(s, nexthop->ifindex); | |
1041 | break; | |
1042 | case NEXTHOP_TYPE_IPV6: | |
1043 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1044 | stream_put(s, &nexthop->gate.ipv6, 16); | |
1045 | stream_putl(s, nexthop->ifindex); | |
1046 | break; | |
1047 | default: | |
1048 | /* do nothing */ | |
1049 | break; | |
1050 | } | |
1051 | num++; | |
1052 | } | |
1053 | stream_putc_at(s, nump, num); | |
1054 | } else { | |
1055 | stream_putc(s, 0); // type | |
1056 | stream_putw(s, 0); // instance | |
1057 | stream_putc(s, 0); // distance | |
1058 | stream_putl(s, 0); // metric | |
1059 | stream_putc(s, 0); // nexthops | |
1060 | } | |
1061 | stream_putw_at(s, 0, stream_get_endp(s)); | |
1062 | ||
1063 | client->nh_last_upd_time = monotime(NULL); | |
1064 | client->last_write_cmd = cmd; | |
1065 | return zebra_server_send_message(client, s); | |
1066 | } | |
1067 | ||
1068 | static void print_nh(struct nexthop *nexthop, struct vty *vty) | |
1069 | { | |
1070 | char buf[BUFSIZ]; | |
1071 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); | |
1072 | ||
1073 | switch (nexthop->type) { | |
1074 | case NEXTHOP_TYPE_IPV4: | |
1075 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
1076 | vty_out(vty, " via %s", inet_ntoa(nexthop->gate.ipv4)); | |
1077 | if (nexthop->ifindex) | |
1078 | vty_out(vty, ", %s", | |
1079 | ifindex2ifname_per_ns(zns, nexthop->ifindex)); | |
1080 | break; | |
1081 | case NEXTHOP_TYPE_IPV6: | |
1082 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1083 | vty_out(vty, " %s", | |
1084 | inet_ntop(AF_INET6, &nexthop->gate.ipv6, buf, BUFSIZ)); | |
1085 | if (nexthop->ifindex) | |
1086 | vty_out(vty, ", via %s", | |
1087 | ifindex2ifname_per_ns(zns, nexthop->ifindex)); | |
1088 | break; | |
1089 | case NEXTHOP_TYPE_IFINDEX: | |
1090 | vty_out(vty, " is directly connected, %s", | |
1091 | ifindex2ifname_per_ns(zns, nexthop->ifindex)); | |
1092 | break; | |
1093 | case NEXTHOP_TYPE_BLACKHOLE: | |
1094 | vty_out(vty, " is directly connected, Null0"); | |
1095 | break; | |
1096 | default: | |
1097 | break; | |
1098 | } | |
1099 | vty_out(vty, "\n"); | |
1100 | } | |
1101 | ||
1102 | static void print_rnh(struct route_node *rn, struct vty *vty) | |
1103 | { | |
1104 | struct rnh *rnh; | |
1105 | struct nexthop *nexthop; | |
1106 | struct listnode *node; | |
1107 | struct zserv *client; | |
1108 | char buf[BUFSIZ]; | |
1109 | ||
1110 | rnh = rn->info; | |
1111 | vty_out(vty, "%s%s\n", | |
1112 | inet_ntop(rn->p.family, &rn->p.u.prefix, buf, BUFSIZ), | |
1113 | CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED) ? "(Connected)" | |
1114 | : ""); | |
1115 | if (rnh->state) { | |
1116 | vty_out(vty, " resolved via %s\n", | |
1117 | zebra_route_string(rnh->state->type)); | |
1118 | for (nexthop = rnh->state->ng.nexthop; nexthop; | |
1119 | nexthop = nexthop->next) | |
1120 | print_nh(nexthop, vty); | |
1121 | } else | |
1122 | vty_out(vty, " unresolved%s\n", | |
1123 | CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED) | |
1124 | ? "(Connected)" | |
1125 | : ""); | |
1126 | ||
1127 | vty_out(vty, " Client list:"); | |
1128 | for (ALL_LIST_ELEMENTS_RO(rnh->client_list, node, client)) | |
1129 | vty_out(vty, " %s(fd %d)%s", zebra_route_string(client->proto), | |
1130 | client->sock, | |
1131 | rnh->filtered[client->proto] ? "(filtered)" : ""); | |
1132 | if (!list_isempty(rnh->zebra_static_route_list)) | |
1133 | vty_out(vty, " zebra%s", | |
1134 | rnh->filtered[ZEBRA_ROUTE_STATIC] ? "(filtered)" : ""); | |
1135 | if (!list_isempty(rnh->zebra_pseudowire_list)) | |
1136 | vty_out(vty, " zebra[pseudowires]"); | |
1137 | vty_out(vty, "\n"); | |
1138 | } |