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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 | 68 | static void print_rnh(struct route_node *rn, struct vty *vty); |
453844ab | 69 | static int zebra_client_cleanup_rnh(struct zserv *client); |
fb018d25 | 70 | |
a50b580a DS |
71 | int zebra_rnh_ip_default_route = 0; |
72 | int zebra_rnh_ipv6_default_route = 0; | |
73 | ||
453844ab QY |
74 | void zebra_rnh_init(void) |
75 | { | |
d8647095 | 76 | hook_register(zapi_client_close, zebra_client_cleanup_rnh); |
453844ab QY |
77 | } |
78 | ||
b72ede27 | 79 | static inline struct route_table *get_rnh_table(vrf_id_t vrfid, int family, |
078430f6 DS |
80 | rnh_type_t type) |
81 | { | |
d62a17ae | 82 | struct zebra_vrf *zvrf; |
83 | struct route_table *t = NULL; | |
84 | ||
85 | zvrf = zebra_vrf_lookup_by_id(vrfid); | |
86 | if (zvrf) | |
87 | switch (type) { | |
88 | case RNH_NEXTHOP_TYPE: | |
89 | t = zvrf->rnh_table[family2afi(family)]; | |
90 | break; | |
91 | case RNH_IMPORT_CHECK_TYPE: | |
92 | t = zvrf->import_check_table[family2afi(family)]; | |
93 | break; | |
94 | } | |
95 | ||
96 | return t; | |
078430f6 DS |
97 | } |
98 | ||
d62a17ae | 99 | char *rnh_str(struct rnh *rnh, char *buf, int size) |
fb018d25 | 100 | { |
d62a17ae | 101 | prefix2str(&(rnh->node->p), buf, size); |
102 | return buf; | |
fb018d25 DS |
103 | } |
104 | ||
d62a17ae | 105 | struct rnh *zebra_add_rnh(struct prefix *p, vrf_id_t vrfid, rnh_type_t type) |
fb018d25 | 106 | { |
d62a17ae | 107 | struct route_table *table; |
108 | struct route_node *rn; | |
109 | struct rnh *rnh = NULL; | |
110 | char buf[PREFIX2STR_BUFFER]; | |
111 | ||
112 | if (IS_ZEBRA_DEBUG_NHT) { | |
113 | prefix2str(p, buf, sizeof(buf)); | |
114 | zlog_debug("%u: Add RNH %s type %d", vrfid, buf, type); | |
115 | } | |
116 | table = get_rnh_table(vrfid, PREFIX_FAMILY(p), type); | |
117 | if (!table) { | |
118 | prefix2str(p, buf, sizeof(buf)); | |
119 | zlog_warn("%u: Add RNH %s type %d - table not found", vrfid, | |
120 | buf, type); | |
121 | return NULL; | |
122 | } | |
123 | ||
124 | /* Make it sure prefixlen is applied to the prefix. */ | |
125 | apply_mask(p); | |
126 | ||
127 | /* Lookup (or add) route node.*/ | |
128 | rn = route_node_get(table, p); | |
129 | ||
130 | if (!rn->info) { | |
131 | rnh = XCALLOC(MTYPE_RNH, sizeof(struct rnh)); | |
132 | rnh->client_list = list_new(); | |
133 | rnh->vrf_id = vrfid; | |
134 | rnh->zebra_static_route_list = list_new(); | |
731a75fe | 135 | rnh->zebra_pseudowire_list = list_new(); |
d62a17ae | 136 | route_lock_node(rn); |
137 | rn->info = rnh; | |
138 | rnh->node = rn; | |
139 | } | |
140 | ||
141 | route_unlock_node(rn); | |
142 | return (rn->info); | |
fb018d25 DS |
143 | } |
144 | ||
d62a17ae | 145 | struct rnh *zebra_lookup_rnh(struct prefix *p, vrf_id_t vrfid, rnh_type_t type) |
fb018d25 | 146 | { |
d62a17ae | 147 | struct route_table *table; |
148 | struct route_node *rn; | |
fb018d25 | 149 | |
d62a17ae | 150 | table = get_rnh_table(vrfid, PREFIX_FAMILY(p), type); |
151 | if (!table) | |
152 | return NULL; | |
fb018d25 | 153 | |
d62a17ae | 154 | /* Make it sure prefixlen is applied to the prefix. */ |
155 | apply_mask(p); | |
fb018d25 | 156 | |
d62a17ae | 157 | /* Lookup route node.*/ |
158 | rn = route_node_lookup(table, p); | |
159 | if (!rn) | |
160 | return NULL; | |
fb018d25 | 161 | |
d62a17ae | 162 | route_unlock_node(rn); |
163 | return (rn->info); | |
fb018d25 DS |
164 | } |
165 | ||
d62a17ae | 166 | void zebra_free_rnh(struct rnh *rnh) |
5a8dfcd8 | 167 | { |
d62a17ae | 168 | rnh->flags |= ZEBRA_NHT_DELETED; |
acdf5e25 DS |
169 | list_delete_and_null(&rnh->client_list); |
170 | list_delete_and_null(&rnh->zebra_static_route_list); | |
171 | list_delete_and_null(&rnh->zebra_pseudowire_list); | |
d62a17ae | 172 | free_state(rnh->vrf_id, rnh->state, rnh->node); |
173 | XFREE(MTYPE_RNH, rnh); | |
5a8dfcd8 RW |
174 | } |
175 | ||
d62a17ae | 176 | void zebra_delete_rnh(struct rnh *rnh, rnh_type_t type) |
fb018d25 | 177 | { |
d62a17ae | 178 | struct route_node *rn; |
fb018d25 | 179 | |
d62a17ae | 180 | if (!rnh || (rnh->flags & ZEBRA_NHT_DELETED) || !(rn = rnh->node)) |
181 | return; | |
fb018d25 | 182 | |
d62a17ae | 183 | if (IS_ZEBRA_DEBUG_NHT) { |
184 | char buf[PREFIX2STR_BUFFER]; | |
185 | zlog_debug("%u: Del RNH %s type %d", rnh->vrf_id, | |
186 | rnh_str(rnh, buf, sizeof(buf)), type); | |
187 | } | |
fb018d25 | 188 | |
d62a17ae | 189 | zebra_free_rnh(rnh); |
190 | rn->info = NULL; | |
191 | route_unlock_node(rn); | |
fb018d25 DS |
192 | } |
193 | ||
d62a17ae | 194 | void zebra_add_rnh_client(struct rnh *rnh, struct zserv *client, |
195 | rnh_type_t type, vrf_id_t vrf_id) | |
fb018d25 | 196 | { |
d62a17ae | 197 | if (IS_ZEBRA_DEBUG_NHT) { |
198 | char buf[PREFIX2STR_BUFFER]; | |
199 | zlog_debug("%u: Client %s registers for RNH %s type %d", vrf_id, | |
200 | zebra_route_string(client->proto), | |
201 | rnh_str(rnh, buf, sizeof(buf)), type); | |
202 | } | |
203 | if (!listnode_lookup(rnh->client_list, client)) { | |
204 | listnode_add(rnh->client_list, client); | |
205 | send_client(rnh, client, type, | |
206 | vrf_id); // Pending: check if its needed | |
207 | } | |
fb018d25 DS |
208 | } |
209 | ||
d62a17ae | 210 | void zebra_remove_rnh_client(struct rnh *rnh, struct zserv *client, |
211 | rnh_type_t type) | |
fb018d25 | 212 | { |
d62a17ae | 213 | if (IS_ZEBRA_DEBUG_NHT) { |
214 | char buf[PREFIX2STR_BUFFER]; | |
215 | zlog_debug("Client %s unregisters for RNH %s type %d", | |
216 | zebra_route_string(client->proto), | |
217 | rnh_str(rnh, buf, sizeof(buf)), type); | |
218 | } | |
219 | listnode_delete(rnh->client_list, client); | |
220 | if (list_isempty(rnh->client_list) | |
731a75fe RW |
221 | && list_isempty(rnh->zebra_static_route_list) |
222 | && list_isempty(rnh->zebra_pseudowire_list)) | |
d62a17ae | 223 | zebra_delete_rnh(rnh, type); |
6e26278c DS |
224 | } |
225 | ||
d62a17ae | 226 | void zebra_register_rnh_static_nh(vrf_id_t vrf_id, struct prefix *nh, |
227 | struct route_node *static_rn) | |
6e26278c | 228 | { |
d62a17ae | 229 | struct rnh *rnh; |
6e26278c | 230 | |
d62a17ae | 231 | rnh = zebra_add_rnh(nh, vrf_id, RNH_NEXTHOP_TYPE); |
232 | if (rnh && !listnode_lookup(rnh->zebra_static_route_list, static_rn)) { | |
233 | listnode_add(rnh->zebra_static_route_list, static_rn); | |
234 | } | |
6e26278c DS |
235 | } |
236 | ||
d62a17ae | 237 | void zebra_deregister_rnh_static_nh(vrf_id_t vrf_id, struct prefix *nh, |
238 | struct route_node *static_rn) | |
6e26278c | 239 | { |
d62a17ae | 240 | struct rnh *rnh; |
6e26278c | 241 | |
d62a17ae | 242 | rnh = zebra_lookup_rnh(nh, vrf_id, RNH_NEXTHOP_TYPE); |
243 | if (!rnh || (rnh->flags & ZEBRA_NHT_DELETED)) | |
244 | return; | |
6e26278c | 245 | |
d62a17ae | 246 | listnode_delete(rnh->zebra_static_route_list, static_rn); |
6e26278c | 247 | |
d62a17ae | 248 | if (list_isempty(rnh->client_list) |
731a75fe RW |
249 | && list_isempty(rnh->zebra_static_route_list) |
250 | && list_isempty(rnh->zebra_pseudowire_list)) | |
d62a17ae | 251 | zebra_delete_rnh(rnh, RNH_NEXTHOP_TYPE); |
fb018d25 DS |
252 | } |
253 | ||
d62a17ae | 254 | void zebra_deregister_rnh_static_nexthops(vrf_id_t vrf_id, |
255 | struct nexthop *nexthop, | |
256 | struct route_node *rn) | |
a399694f | 257 | { |
d62a17ae | 258 | struct nexthop *nh; |
259 | struct prefix nh_p; | |
260 | ||
261 | for (nh = nexthop; nh; nh = nh->next) { | |
262 | switch (nh->type) { | |
263 | case NEXTHOP_TYPE_IPV4: | |
264 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
265 | nh_p.family = AF_INET; | |
266 | nh_p.prefixlen = IPV4_MAX_BITLEN; | |
267 | nh_p.u.prefix4 = nh->gate.ipv4; | |
268 | break; | |
269 | case NEXTHOP_TYPE_IPV6: | |
270 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
271 | nh_p.family = AF_INET6; | |
272 | nh_p.prefixlen = IPV6_MAX_BITLEN; | |
273 | nh_p.u.prefix6 = nh->gate.ipv6; | |
274 | break; | |
275 | /* | |
276 | * Not sure what really to do here, we are not | |
277 | * supposed to have either of these for NHT | |
278 | * and the code has no way to know what prefix | |
279 | * to use. So I'm going to just continue | |
280 | * for the moment, which is preferable to | |
281 | * what is currently happening which is a | |
282 | * CRASH and BURN. | |
283 | * Some simple testing shows that we | |
284 | * are not leaving slag around for these | |
285 | * skipped static routes. Since | |
286 | * they don't appear to be installed | |
287 | */ | |
288 | case NEXTHOP_TYPE_IFINDEX: | |
289 | case NEXTHOP_TYPE_BLACKHOLE: | |
290 | continue; | |
291 | break; | |
292 | } | |
293 | zebra_deregister_rnh_static_nh(vrf_id, &nh_p, rn); | |
294 | } | |
a399694f DS |
295 | } |
296 | ||
731a75fe RW |
297 | /* XXX move this utility function elsewhere? */ |
298 | static void addr2hostprefix(int af, const union g_addr *addr, | |
299 | struct prefix *prefix) | |
300 | { | |
301 | switch (af) { | |
302 | case AF_INET: | |
303 | prefix->family = AF_INET; | |
304 | prefix->prefixlen = IPV4_MAX_BITLEN; | |
305 | prefix->u.prefix4 = addr->ipv4; | |
306 | break; | |
307 | case AF_INET6: | |
308 | prefix->family = AF_INET6; | |
309 | prefix->prefixlen = IPV6_MAX_BITLEN; | |
310 | prefix->u.prefix6 = addr->ipv6; | |
311 | break; | |
312 | default: | |
c31a793b | 313 | memset(prefix, 0, sizeof(*prefix)); |
731a75fe RW |
314 | zlog_warn("%s: unknown address family %d", __func__, af); |
315 | break; | |
316 | } | |
317 | } | |
318 | ||
319 | void zebra_register_rnh_pseudowire(vrf_id_t vrf_id, struct zebra_pw *pw) | |
320 | { | |
321 | struct prefix nh; | |
322 | struct rnh *rnh; | |
323 | ||
324 | addr2hostprefix(pw->af, &pw->nexthop, &nh); | |
325 | rnh = zebra_add_rnh(&nh, vrf_id, RNH_NEXTHOP_TYPE); | |
326 | if (rnh && !listnode_lookup(rnh->zebra_pseudowire_list, pw)) { | |
327 | listnode_add(rnh->zebra_pseudowire_list, pw); | |
328 | pw->rnh = rnh; | |
329 | zebra_evaluate_rnh(vrf_id, pw->af, 1, RNH_NEXTHOP_TYPE, &nh); | |
330 | } | |
331 | } | |
332 | ||
333 | void zebra_deregister_rnh_pseudowire(vrf_id_t vrf_id, struct zebra_pw *pw) | |
334 | { | |
335 | struct rnh *rnh; | |
336 | ||
337 | rnh = pw->rnh; | |
338 | if (!rnh) | |
339 | return; | |
340 | ||
341 | listnode_delete(rnh->zebra_pseudowire_list, pw); | |
342 | pw->rnh = NULL; | |
343 | ||
344 | if (list_isempty(rnh->client_list) | |
345 | && list_isempty(rnh->zebra_static_route_list) | |
346 | && list_isempty(rnh->zebra_pseudowire_list)) | |
347 | zebra_delete_rnh(rnh, RNH_NEXTHOP_TYPE); | |
348 | } | |
349 | ||
d50b5bdd | 350 | /* Apply the NHT route-map for a client to the route (and nexthops) |
351 | * resolving a NH. | |
352 | */ | |
d62a17ae | 353 | static int zebra_rnh_apply_nht_rmap(int family, struct route_node *prn, |
354 | struct route_entry *re, int proto) | |
6e26278c | 355 | { |
d62a17ae | 356 | int at_least_one = 0; |
357 | int rmap_family; /* Route map has diff AF family enum */ | |
358 | struct nexthop *nexthop; | |
359 | int ret; | |
360 | ||
361 | rmap_family = (family == AF_INET) ? AFI_IP : AFI_IP6; | |
362 | ||
363 | if (prn && re) { | |
7ee30f28 DS |
364 | for (nexthop = re->ng.nexthop; nexthop; |
365 | nexthop = nexthop->next) { | |
d62a17ae | 366 | ret = zebra_nht_route_map_check(rmap_family, proto, |
367 | &prn->p, re, nexthop); | |
368 | if (ret != RMAP_DENYMATCH) { | |
369 | SET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
370 | at_least_one++; /* at least one valid NH */ | |
371 | } else { | |
372 | UNSET_FLAG(nexthop->flags, NEXTHOP_FLAG_ACTIVE); | |
373 | } | |
374 | } | |
6e26278c | 375 | } |
d62a17ae | 376 | return (at_least_one); |
6e26278c DS |
377 | } |
378 | ||
d50b5bdd | 379 | /* |
fd7fd9e5 DS |
380 | * Determine appropriate route (RE entry) resolving a tracked BGP route |
381 | * for BGP route for import. | |
d50b5bdd | 382 | */ |
996c9314 LB |
383 | static struct route_entry * |
384 | zebra_rnh_resolve_import_entry(vrf_id_t vrfid, int family, | |
385 | struct route_node *nrn, struct rnh *rnh, | |
386 | struct route_node **prn) | |
fb018d25 | 387 | { |
d62a17ae | 388 | struct route_table *route_table; |
389 | struct route_node *rn; | |
390 | struct route_entry *re; | |
391 | ||
392 | *prn = NULL; | |
393 | ||
394 | route_table = zebra_vrf_table(family2afi(family), SAFI_UNICAST, vrfid); | |
395 | if (!route_table) // unexpected | |
396 | return NULL; | |
397 | ||
398 | rn = route_node_match(route_table, &nrn->p); | |
399 | if (!rn) | |
400 | return NULL; | |
401 | ||
fd7fd9e5 DS |
402 | /* Unlock route node - we don't need to lock when walking the tree. */ |
403 | route_unlock_node(rn); | |
404 | ||
996c9314 LB |
405 | if (CHECK_FLAG(rnh->flags, ZEBRA_NHT_EXACT_MATCH) |
406 | && !prefix_same(&nrn->p, &rn->p)) | |
fd7fd9e5 | 407 | return NULL; |
d62a17ae | 408 | |
fd7fd9e5 | 409 | /* Identify appropriate route entry. */ |
996c9314 LB |
410 | RNODE_FOREACH_RE (rn, re) { |
411 | if (!CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED) | |
412 | && CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED) | |
413 | && (re->type != ZEBRA_ROUTE_BGP)) | |
fd7fd9e5 | 414 | break; |
d62a17ae | 415 | } |
416 | ||
d62a17ae | 417 | if (re) |
418 | *prn = rn; | |
419 | return re; | |
d50b5bdd | 420 | } |
421 | ||
422 | /* | |
423 | * See if a tracked route entry for import (by BGP) has undergone any | |
424 | * change, and if so, notify the client. | |
425 | */ | |
d62a17ae | 426 | static void zebra_rnh_eval_import_check_entry(vrf_id_t vrfid, int family, |
427 | int force, struct route_node *nrn, | |
428 | struct rnh *rnh, | |
429 | struct route_entry *re) | |
d50b5bdd | 430 | { |
d62a17ae | 431 | int state_changed = 0; |
432 | struct zserv *client; | |
433 | char bufn[INET6_ADDRSTRLEN]; | |
434 | struct listnode *node; | |
435 | struct nexthop *nexthop; | |
436 | ||
437 | if (re && (rnh->state == NULL)) { | |
7ee30f28 | 438 | for (ALL_NEXTHOPS(re->ng, nexthop)) |
d62a17ae | 439 | if (CHECK_FLAG(nexthop->flags, NEXTHOP_FLAG_FIB)) { |
440 | state_changed = 1; | |
441 | break; | |
442 | } | |
443 | } else if (!re && (rnh->state != NULL)) | |
444 | state_changed = 1; | |
445 | ||
446 | if (compare_state(re, rnh->state)) | |
447 | copy_state(rnh, re, nrn); | |
448 | ||
449 | if (state_changed || force) { | |
450 | if (IS_ZEBRA_DEBUG_NHT) { | |
451 | prefix2str(&nrn->p, bufn, INET6_ADDRSTRLEN); | |
452 | zlog_debug("%u:%s: Route import check %s %s\n", vrfid, | |
453 | bufn, rnh->state ? "passed" : "failed", | |
454 | state_changed ? "(state changed)" : ""); | |
455 | } | |
456 | /* state changed, notify clients */ | |
457 | for (ALL_LIST_ELEMENTS_RO(rnh->client_list, node, client)) { | |
458 | send_client(rnh, client, RNH_IMPORT_CHECK_TYPE, vrfid); | |
459 | } | |
460 | } | |
d50b5bdd | 461 | } |
fb018d25 | 462 | |
d50b5bdd | 463 | /* |
464 | * Notify clients registered for this nexthop about a change. | |
465 | */ | |
d62a17ae | 466 | static void zebra_rnh_notify_protocol_clients(vrf_id_t vrfid, int family, |
467 | struct route_node *nrn, | |
468 | struct rnh *rnh, | |
469 | struct route_node *prn, | |
470 | struct route_entry *re) | |
d50b5bdd | 471 | { |
d62a17ae | 472 | struct listnode *node; |
473 | struct zserv *client; | |
474 | char bufn[INET6_ADDRSTRLEN]; | |
475 | char bufp[INET6_ADDRSTRLEN]; | |
476 | int num_resolving_nh; | |
477 | ||
478 | if (IS_ZEBRA_DEBUG_NHT) { | |
479 | prefix2str(&nrn->p, bufn, INET6_ADDRSTRLEN); | |
480 | if (prn && re) { | |
481 | prefix2str(&prn->p, bufp, INET6_ADDRSTRLEN); | |
482 | zlog_debug("%u:%s: NH resolved over route %s", vrfid, | |
483 | bufn, bufp); | |
484 | } else | |
485 | zlog_debug("%u:%s: NH has become unresolved", vrfid, | |
486 | bufn); | |
487 | } | |
488 | ||
489 | for (ALL_LIST_ELEMENTS_RO(rnh->client_list, node, client)) { | |
490 | if (prn && re) { | |
491 | /* Apply route-map for this client to route resolving | |
492 | * this | |
493 | * nexthop to see if it is filtered or not. | |
494 | */ | |
495 | num_resolving_nh = zebra_rnh_apply_nht_rmap( | |
496 | family, prn, re, client->proto); | |
497 | if (num_resolving_nh) | |
498 | rnh->filtered[client->proto] = 0; | |
499 | else | |
500 | rnh->filtered[client->proto] = 1; | |
501 | ||
502 | if (IS_ZEBRA_DEBUG_NHT) | |
503 | zlog_debug( | |
504 | "%u:%s: Notifying client %s about NH %s", | |
505 | vrfid, bufn, | |
506 | zebra_route_string(client->proto), | |
507 | num_resolving_nh | |
508 | ? "" | |
509 | : "(filtered by route-map)"); | |
510 | } else { | |
511 | rnh->filtered[client->proto] = 0; | |
512 | if (IS_ZEBRA_DEBUG_NHT) | |
513 | zlog_debug( | |
514 | "%u:%s: Notifying client %s about NH (unreachable)", | |
515 | vrfid, bufn, | |
516 | zebra_route_string(client->proto)); | |
517 | } | |
518 | ||
519 | send_client(rnh, client, RNH_NEXTHOP_TYPE, vrfid); | |
520 | } | |
d50b5bdd | 521 | } |
078430f6 | 522 | |
d61d5d88 DS |
523 | static void zebra_rnh_process_pbr_tables(int family, |
524 | struct route_node *nrn, | |
525 | struct rnh *rnh, | |
526 | struct route_node *prn, | |
527 | struct route_entry *re) | |
528 | { | |
529 | struct zebra_ns_table *znst; | |
530 | struct route_entry *o_re; | |
531 | struct route_node *o_rn; | |
532 | struct listnode *node; | |
533 | struct zserv *client; | |
534 | struct zebra_ns *zns; | |
535 | afi_t afi = AFI_IP; | |
536 | ||
537 | if (family == AF_INET6) | |
538 | afi = AFI_IP6; | |
539 | ||
540 | /* | |
541 | * We are only concerned about nexthops that change for | |
542 | * anyone using PBR | |
543 | */ | |
544 | for (ALL_LIST_ELEMENTS_RO(rnh->client_list, node, client)) { | |
545 | if (client->proto == ZEBRA_ROUTE_PBR) | |
546 | break; | |
547 | } | |
548 | ||
549 | if (!client) | |
550 | return; | |
551 | ||
552 | zns = zebra_ns_lookup(NS_DEFAULT); | |
553 | RB_FOREACH (znst, zebra_ns_table_head, &zns->ns_tables) { | |
554 | if (afi != znst->afi) | |
555 | continue; | |
556 | ||
557 | for (o_rn = route_top(znst->table); | |
558 | o_rn; o_rn = srcdest_route_next(o_rn)) { | |
559 | RNODE_FOREACH_RE (o_rn, o_re) { | |
560 | if (o_re->type == ZEBRA_ROUTE_PBR) | |
561 | break; | |
562 | ||
563 | } | |
564 | ||
565 | /* | |
566 | * If we have a PBR route and a nexthop changes | |
567 | * just rethink it. Yes this is a hammer, but | |
568 | * a small one | |
569 | */ | |
4d96fd9f DS |
570 | if (o_re) { |
571 | SET_FLAG(o_re->status, ROUTE_ENTRY_CHANGED); | |
d61d5d88 | 572 | rib_queue_add(o_rn); |
4d96fd9f | 573 | } |
d61d5d88 DS |
574 | } |
575 | } | |
576 | } | |
577 | ||
d62a17ae | 578 | static void zebra_rnh_process_static_routes(vrf_id_t vrfid, int family, |
579 | struct route_node *nrn, | |
580 | struct rnh *rnh, | |
581 | struct route_node *prn, | |
582 | struct route_entry *re) | |
d50b5bdd | 583 | { |
d62a17ae | 584 | struct listnode *node; |
585 | int num_resolving_nh = 0; | |
586 | struct route_node *static_rn; | |
587 | struct route_entry *sre; | |
588 | struct nexthop *nexthop; | |
589 | char bufn[INET6_ADDRSTRLEN]; | |
590 | char bufp[INET6_ADDRSTRLEN]; | |
591 | char bufs[INET6_ADDRSTRLEN]; | |
592 | ||
593 | if (IS_ZEBRA_DEBUG_NHT) { | |
594 | prefix2str(&nrn->p, bufn, INET6_ADDRSTRLEN); | |
595 | if (prn) | |
596 | prefix2str(&prn->p, bufp, INET6_ADDRSTRLEN); | |
597 | } | |
078430f6 | 598 | |
d62a17ae | 599 | if (prn && re) { |
600 | /* Apply route-map for "static" to route resolving this | |
601 | * nexthop to see if it is filtered or not. | |
602 | */ | |
603 | num_resolving_nh = zebra_rnh_apply_nht_rmap(family, prn, re, | |
604 | ZEBRA_ROUTE_STATIC); | |
605 | if (num_resolving_nh) | |
606 | rnh->filtered[ZEBRA_ROUTE_STATIC] = 0; | |
607 | else | |
608 | rnh->filtered[ZEBRA_ROUTE_STATIC] = 1; | |
609 | } else | |
610 | rnh->filtered[ZEBRA_ROUTE_STATIC] = 0; | |
611 | ||
612 | /* Evaluate each static route associated with this nexthop. */ | |
613 | for (ALL_LIST_ELEMENTS_RO(rnh->zebra_static_route_list, node, | |
614 | static_rn)) { | |
a2addae8 | 615 | RNODE_FOREACH_RE (static_rn, sre) { |
d62a17ae | 616 | if (sre->type != ZEBRA_ROUTE_STATIC) |
617 | continue; | |
618 | ||
619 | /* Set the filter flag for the correct nexthop - static | |
620 | * route may | |
621 | * be having multiple. We care here only about | |
622 | * registered nexthops. | |
623 | */ | |
7ee30f28 | 624 | for (nexthop = sre->ng.nexthop; nexthop; |
d62a17ae | 625 | nexthop = nexthop->next) { |
626 | switch (nexthop->type) { | |
627 | case NEXTHOP_TYPE_IPV4: | |
628 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
629 | if (nexthop->gate.ipv4.s_addr | |
630 | == nrn->p.u.prefix4.s_addr) { | |
631 | if (num_resolving_nh) | |
632 | UNSET_FLAG( | |
633 | nexthop->flags, | |
634 | NEXTHOP_FLAG_FILTERED); | |
635 | else | |
636 | SET_FLAG( | |
637 | nexthop->flags, | |
638 | NEXTHOP_FLAG_FILTERED); | |
639 | } | |
640 | break; | |
641 | case NEXTHOP_TYPE_IPV6: | |
642 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
643 | ||
644 | if (memcmp(&nexthop->gate.ipv6, | |
645 | &nrn->p.u.prefix6, 16) | |
646 | == 0) { | |
647 | if (num_resolving_nh) | |
648 | UNSET_FLAG( | |
649 | nexthop->flags, | |
650 | NEXTHOP_FLAG_FILTERED); | |
651 | else | |
652 | SET_FLAG( | |
653 | nexthop->flags, | |
654 | NEXTHOP_FLAG_FILTERED); | |
655 | } | |
656 | break; | |
657 | default: | |
658 | break; | |
659 | } | |
660 | } | |
661 | ||
662 | if (IS_ZEBRA_DEBUG_NHT) { | |
663 | prefix2str(&static_rn->p, bufs, | |
664 | INET6_ADDRSTRLEN); | |
665 | if (prn && re) | |
666 | zlog_debug( | |
667 | "%u:%s: NH change %s, scheduling static route %s", | |
668 | vrfid, bufn, | |
669 | num_resolving_nh | |
670 | ? "" | |
671 | : "(filtered by route-map)", | |
672 | bufs); | |
673 | else | |
674 | zlog_debug( | |
675 | "%u:%s: NH unreachable, scheduling static route %s", | |
676 | vrfid, bufn, bufs); | |
677 | } | |
678 | ||
679 | SET_FLAG(sre->status, ROUTE_ENTRY_CHANGED); | |
680 | SET_FLAG(sre->status, ROUTE_ENTRY_NEXTHOPS_CHANGED); | |
681 | } | |
682 | ||
683 | rib_queue_add(static_rn); | |
684 | } | |
d50b5bdd | 685 | } |
078430f6 | 686 | |
fd7fd9e5 DS |
687 | /* |
688 | * Determine appropriate route (route entry) resolving a tracked | |
689 | * nexthop. | |
690 | */ | |
996c9314 LB |
691 | static struct route_entry * |
692 | zebra_rnh_resolve_nexthop_entry(vrf_id_t vrfid, int family, | |
693 | struct route_node *nrn, struct rnh *rnh, | |
694 | struct route_node **prn) | |
fd7fd9e5 DS |
695 | { |
696 | struct route_table *route_table; | |
697 | struct route_node *rn; | |
698 | struct route_entry *re; | |
699 | ||
700 | *prn = NULL; | |
701 | ||
702 | route_table = zebra_vrf_table(family2afi(family), SAFI_UNICAST, vrfid); | |
703 | if (!route_table) | |
704 | return NULL; | |
705 | ||
706 | rn = route_node_match(route_table, &nrn->p); | |
707 | if (!rn) | |
708 | return NULL; | |
709 | ||
710 | /* Unlock route node - we don't need to lock when walking the tree. */ | |
711 | route_unlock_node(rn); | |
712 | ||
713 | /* While resolving nexthops, we may need to walk up the tree from the | |
714 | * most-specific match. Do similar logic as in zebra_rib.c | |
715 | */ | |
716 | while (rn) { | |
717 | /* Do not resolve over default route unless allowed && | |
718 | * match route to be exact if so specified | |
719 | */ | |
996c9314 LB |
720 | if (is_default_prefix(&rn->p) |
721 | && !rnh_resolve_via_default(rn->p.family)) | |
fd7fd9e5 DS |
722 | return NULL; |
723 | ||
724 | /* Identify appropriate route entry. */ | |
996c9314 | 725 | RNODE_FOREACH_RE (rn, re) { |
fd7fd9e5 DS |
726 | if (CHECK_FLAG(re->status, ROUTE_ENTRY_REMOVED)) |
727 | continue; | |
728 | if (!CHECK_FLAG(re->flags, ZEBRA_FLAG_SELECTED)) | |
729 | continue; | |
730 | ||
731 | if (CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED)) { | |
732 | if ((re->type == ZEBRA_ROUTE_CONNECT) | |
733 | || (re->type == ZEBRA_ROUTE_STATIC)) | |
734 | break; | |
735 | if (re->type == ZEBRA_ROUTE_NHRP) { | |
736 | struct nexthop *nexthop; | |
737 | ||
7ee30f28 | 738 | for (nexthop = re->ng.nexthop; nexthop; |
fd7fd9e5 DS |
739 | nexthop = nexthop->next) |
740 | if (nexthop->type | |
996c9314 | 741 | == NEXTHOP_TYPE_IFINDEX) |
fd7fd9e5 DS |
742 | break; |
743 | if (nexthop) | |
744 | break; | |
745 | } | |
746 | } else | |
747 | break; | |
748 | } | |
749 | ||
750 | /* Route entry found, we're done; else, walk up the tree. */ | |
751 | if (re) { | |
752 | *prn = rn; | |
753 | return re; | |
754 | } | |
755 | ||
756 | if (CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED)) | |
757 | rn = rn->parent; | |
758 | else | |
759 | return NULL; | |
760 | } | |
761 | ||
762 | return NULL; | |
763 | } | |
764 | ||
731a75fe RW |
765 | static void zebra_rnh_process_pseudowires(vrf_id_t vrfid, struct rnh *rnh) |
766 | { | |
767 | struct zebra_pw *pw; | |
768 | struct listnode *node; | |
769 | ||
770 | for (ALL_LIST_ELEMENTS_RO(rnh->zebra_pseudowire_list, node, pw)) | |
771 | zebra_pw_update(pw); | |
772 | } | |
773 | ||
d50b5bdd | 774 | /* |
775 | * See if a tracked nexthop entry has undergone any change, and if so, | |
776 | * take appropriate action; this involves notifying any clients and/or | |
777 | * scheduling dependent static routes for processing. | |
778 | */ | |
d62a17ae | 779 | static void zebra_rnh_eval_nexthop_entry(vrf_id_t vrfid, int family, int force, |
780 | struct route_node *nrn, | |
781 | struct rnh *rnh, | |
782 | struct route_node *prn, | |
783 | struct route_entry *re) | |
d50b5bdd | 784 | { |
d62a17ae | 785 | int state_changed = 0; |
786 | ||
787 | /* If we're resolving over a different route, resolution has changed or | |
788 | * the resolving route has some change (e.g., metric), there is a state | |
789 | * change. | |
790 | */ | |
791 | if (!prefix_same(&rnh->resolved_route, &prn->p)) { | |
792 | if (prn) | |
793 | prefix_copy(&rnh->resolved_route, &prn->p); | |
794 | else | |
795 | memset(&rnh->resolved_route, 0, sizeof(struct prefix)); | |
796 | ||
797 | copy_state(rnh, re, nrn); | |
798 | state_changed = 1; | |
799 | } else if (compare_state(re, rnh->state)) { | |
800 | copy_state(rnh, re, nrn); | |
801 | state_changed = 1; | |
802 | } | |
803 | ||
804 | if (state_changed || force) { | |
805 | /* NOTE: Use the "copy" of resolving route stored in 'rnh' i.e., | |
806 | * rnh->state. | |
807 | */ | |
808 | /* Notify registered protocol clients. */ | |
809 | zebra_rnh_notify_protocol_clients(vrfid, family, nrn, rnh, prn, | |
810 | rnh->state); | |
811 | ||
812 | /* Process static routes attached to this nexthop */ | |
813 | zebra_rnh_process_static_routes(vrfid, family, nrn, rnh, prn, | |
814 | rnh->state); | |
731a75fe | 815 | |
d61d5d88 DS |
816 | zebra_rnh_process_pbr_tables(family, nrn, rnh, prn, |
817 | rnh->state); | |
818 | ||
731a75fe RW |
819 | /* Process pseudowires attached to this nexthop */ |
820 | zebra_rnh_process_pseudowires(vrfid, rnh); | |
d62a17ae | 821 | } |
d50b5bdd | 822 | } |
6e26278c | 823 | |
d50b5bdd | 824 | /* Evaluate one tracked entry */ |
d62a17ae | 825 | static void zebra_rnh_evaluate_entry(vrf_id_t vrfid, int family, int force, |
826 | rnh_type_t type, struct route_node *nrn) | |
d50b5bdd | 827 | { |
d62a17ae | 828 | struct rnh *rnh; |
829 | struct route_entry *re; | |
830 | struct route_node *prn; | |
831 | char bufn[INET6_ADDRSTRLEN]; | |
832 | ||
833 | if (IS_ZEBRA_DEBUG_NHT) { | |
834 | prefix2str(&nrn->p, bufn, INET6_ADDRSTRLEN); | |
835 | zlog_debug("%u:%s: Evaluate RNH, type %d %s", vrfid, bufn, type, | |
836 | force ? "(force)" : ""); | |
837 | } | |
838 | ||
839 | rnh = nrn->info; | |
840 | ||
841 | /* Identify route entry (RE) resolving this tracked entry. */ | |
fd7fd9e5 | 842 | if (type == RNH_IMPORT_CHECK_TYPE) |
996c9314 LB |
843 | re = zebra_rnh_resolve_import_entry(vrfid, family, nrn, rnh, |
844 | &prn); | |
fd7fd9e5 DS |
845 | else |
846 | re = zebra_rnh_resolve_nexthop_entry(vrfid, family, nrn, rnh, | |
847 | &prn); | |
d62a17ae | 848 | |
849 | /* If the entry cannot be resolved and that is also the existing state, | |
850 | * there is nothing further to do. | |
851 | */ | |
852 | if (!re && rnh->state == NULL && !force) | |
853 | return; | |
854 | ||
855 | /* Process based on type of entry. */ | |
856 | if (type == RNH_IMPORT_CHECK_TYPE) | |
857 | zebra_rnh_eval_import_check_entry(vrfid, family, force, nrn, | |
858 | rnh, re); | |
859 | else | |
860 | zebra_rnh_eval_nexthop_entry(vrfid, family, force, nrn, rnh, | |
861 | prn, re); | |
d50b5bdd | 862 | } |
863 | ||
8ce5e6a3 | 864 | /* |
f0f77c9a DS |
865 | * Clear the ROUTE_ENTRY_NEXTHOPS_CHANGED flag |
866 | * from the re entries. | |
8ce5e6a3 DS |
867 | * |
868 | * Please note we are doing this *after* we have | |
869 | * notified the world about each nexthop as that | |
f0f77c9a | 870 | * we can have a situation where one re entry |
8ce5e6a3 DS |
871 | * covers multiple nexthops we are interested in. |
872 | */ | |
d62a17ae | 873 | static void zebra_rnh_clear_nhc_flag(vrf_id_t vrfid, int family, |
874 | rnh_type_t type, struct route_node *nrn) | |
8ce5e6a3 | 875 | { |
d62a17ae | 876 | struct rnh *rnh; |
877 | struct route_entry *re; | |
878 | struct route_node *prn; | |
8ce5e6a3 | 879 | |
d62a17ae | 880 | rnh = nrn->info; |
8ce5e6a3 | 881 | |
fd7fd9e5 DS |
882 | /* Identify route entry (RIB) resolving this tracked entry. */ |
883 | if (type == RNH_IMPORT_CHECK_TYPE) | |
996c9314 LB |
884 | re = zebra_rnh_resolve_import_entry(vrfid, family, nrn, rnh, |
885 | &prn); | |
fd7fd9e5 DS |
886 | else |
887 | re = zebra_rnh_resolve_nexthop_entry(vrfid, family, nrn, rnh, | |
888 | &prn); | |
8ce5e6a3 | 889 | |
332ad713 | 890 | if (re) { |
d62a17ae | 891 | UNSET_FLAG(re->status, ROUTE_ENTRY_NEXTHOPS_CHANGED); |
332ad713 RW |
892 | UNSET_FLAG(re->status, ROUTE_ENTRY_LABELS_CHANGED); |
893 | } | |
8ce5e6a3 | 894 | } |
d50b5bdd | 895 | |
896 | /* Evaluate all tracked entries (nexthops or routes for import into BGP) | |
897 | * of a particular VRF and address-family or a specific prefix. | |
898 | */ | |
d62a17ae | 899 | void zebra_evaluate_rnh(vrf_id_t vrfid, int family, int force, rnh_type_t type, |
900 | struct prefix *p) | |
d50b5bdd | 901 | { |
d62a17ae | 902 | struct route_table *rnh_table; |
903 | struct route_node *nrn; | |
904 | ||
905 | rnh_table = get_rnh_table(vrfid, family, type); | |
906 | if (!rnh_table) // unexpected | |
907 | return; | |
908 | ||
909 | if (p) { | |
910 | /* Evaluating a specific entry, make sure it exists. */ | |
911 | nrn = route_node_lookup(rnh_table, p); | |
912 | if (nrn && nrn->info) | |
913 | zebra_rnh_evaluate_entry(vrfid, family, force, type, | |
914 | nrn); | |
915 | ||
916 | if (nrn) | |
917 | route_unlock_node(nrn); | |
918 | } else { | |
919 | /* Evaluate entire table. */ | |
920 | nrn = route_top(rnh_table); | |
921 | while (nrn) { | |
922 | if (nrn->info) | |
923 | zebra_rnh_evaluate_entry(vrfid, family, force, | |
924 | type, nrn); | |
925 | nrn = route_next(nrn); /* this will also unlock nrn */ | |
926 | } | |
927 | nrn = route_top(rnh_table); | |
928 | while (nrn) { | |
929 | if (nrn->info) | |
930 | zebra_rnh_clear_nhc_flag(vrfid, family, type, | |
931 | nrn); | |
932 | nrn = route_next(nrn); /* this will also unlock nrn */ | |
933 | } | |
934 | } | |
fb018d25 DS |
935 | } |
936 | ||
d62a17ae | 937 | void zebra_print_rnh_table(vrf_id_t vrfid, int af, struct vty *vty, |
938 | rnh_type_t type) | |
fb018d25 | 939 | { |
d62a17ae | 940 | struct route_table *table; |
941 | struct route_node *rn; | |
942 | ||
943 | table = get_rnh_table(vrfid, af, type); | |
944 | if (!table) { | |
945 | zlog_debug("print_rnhs: rnh table not found\n"); | |
946 | return; | |
947 | } | |
948 | ||
949 | for (rn = route_top(table); rn; rn = route_next(rn)) | |
950 | if (rn->info) | |
951 | print_rnh(rn, vty); | |
fb018d25 DS |
952 | } |
953 | ||
fb018d25 | 954 | /** |
f0f77c9a | 955 | * free_state - free up the re structure associated with the rnh. |
fb018d25 | 956 | */ |
d62a17ae | 957 | static void free_state(vrf_id_t vrf_id, struct route_entry *re, |
958 | struct route_node *rn) | |
fb018d25 | 959 | { |
fb018d25 | 960 | |
d62a17ae | 961 | if (!re) |
962 | return; | |
fb018d25 | 963 | |
d62a17ae | 964 | /* free RE and nexthops */ |
7ee30f28 DS |
965 | zebra_deregister_rnh_static_nexthops(vrf_id, re->ng.nexthop, rn); |
966 | nexthops_free(re->ng.nexthop); | |
d62a17ae | 967 | XFREE(MTYPE_RE, re); |
fb018d25 DS |
968 | } |
969 | ||
d62a17ae | 970 | static void copy_state(struct rnh *rnh, struct route_entry *re, |
971 | struct route_node *rn) | |
fb018d25 | 972 | { |
d62a17ae | 973 | struct route_entry *state; |
fb018d25 | 974 | |
d62a17ae | 975 | if (rnh->state) { |
976 | free_state(rnh->vrf_id, rnh->state, rn); | |
977 | rnh->state = NULL; | |
978 | } | |
fb018d25 | 979 | |
d62a17ae | 980 | if (!re) |
981 | return; | |
fb018d25 | 982 | |
d62a17ae | 983 | state = XCALLOC(MTYPE_RE, sizeof(struct route_entry)); |
984 | state->type = re->type; | |
7733c6c4 | 985 | state->distance = re->distance; |
d62a17ae | 986 | state->metric = re->metric; |
8f43b4d8 | 987 | state->vrf_id = re->vrf_id; |
fb018d25 | 988 | |
7ee30f28 | 989 | route_entry_copy_nexthops(state, re->ng.nexthop); |
d62a17ae | 990 | rnh->state = state; |
fb018d25 DS |
991 | } |
992 | ||
d62a17ae | 993 | static int compare_state(struct route_entry *r1, struct route_entry *r2) |
fb018d25 | 994 | { |
fb018d25 | 995 | |
d62a17ae | 996 | if (!r1 && !r2) |
997 | return 0; | |
fb018d25 | 998 | |
d62a17ae | 999 | if ((!r1 && r2) || (r1 && !r2)) |
1000 | return 1; | |
fb018d25 | 1001 | |
7733c6c4 JB |
1002 | if (r1->distance != r2->distance) |
1003 | return 1; | |
1004 | ||
d62a17ae | 1005 | if (r1->metric != r2->metric) |
1006 | return 1; | |
fb018d25 | 1007 | |
d62a17ae | 1008 | if (r1->nexthop_num != r2->nexthop_num) |
1009 | return 1; | |
fb018d25 | 1010 | |
332ad713 RW |
1011 | if (CHECK_FLAG(r1->status, ROUTE_ENTRY_NEXTHOPS_CHANGED) |
1012 | || CHECK_FLAG(r1->status, ROUTE_ENTRY_LABELS_CHANGED)) | |
d62a17ae | 1013 | return 1; |
fb018d25 | 1014 | |
d62a17ae | 1015 | return 0; |
fb018d25 DS |
1016 | } |
1017 | ||
d62a17ae | 1018 | static int send_client(struct rnh *rnh, struct zserv *client, rnh_type_t type, |
1019 | vrf_id_t vrf_id) | |
fb018d25 | 1020 | { |
d62a17ae | 1021 | struct stream *s; |
1022 | struct route_entry *re; | |
1023 | unsigned long nump; | |
d7c0a89a | 1024 | uint8_t num; |
0acf4df0 | 1025 | struct nexthop *nh; |
d62a17ae | 1026 | struct route_node *rn; |
1027 | int cmd = (type == RNH_IMPORT_CHECK_TYPE) ? ZEBRA_IMPORT_CHECK_UPDATE | |
1028 | : ZEBRA_NEXTHOP_UPDATE; | |
1029 | ||
1030 | rn = rnh->node; | |
1031 | re = rnh->state; | |
1032 | ||
1033 | /* Get output stream. */ | |
1002497a | 1034 | s = stream_new(ZEBRA_MAX_PACKET_SIZ); |
d62a17ae | 1035 | |
7cf15b25 | 1036 | zclient_create_header(s, cmd, vrf_id); |
d62a17ae | 1037 | |
1038 | stream_putw(s, rn->p.family); | |
1039 | switch (rn->p.family) { | |
1040 | case AF_INET: | |
1041 | stream_putc(s, rn->p.prefixlen); | |
1042 | stream_put_in_addr(s, &rn->p.u.prefix4); | |
fb018d25 | 1043 | break; |
d62a17ae | 1044 | case AF_INET6: |
1045 | stream_putc(s, rn->p.prefixlen); | |
1046 | stream_put(s, &rn->p.u.prefix6, IPV6_MAX_BYTELEN); | |
fb018d25 | 1047 | break; |
d62a17ae | 1048 | default: |
1049 | zlog_err("%s: Unknown family (%d) notification attempted\n", | |
1050 | __FUNCTION__, rn->p.family); | |
fb018d25 | 1051 | break; |
d62a17ae | 1052 | } |
1053 | if (re) { | |
05dd5aaf DS |
1054 | stream_putc(s, re->type); |
1055 | stream_putw(s, re->instance); | |
d62a17ae | 1056 | stream_putc(s, re->distance); |
1057 | stream_putl(s, re->metric); | |
1058 | num = 0; | |
1059 | nump = stream_get_endp(s); | |
1060 | stream_putc(s, 0); | |
0acf4df0 DS |
1061 | for (nh = re->ng.nexthop; nh; nh = nh->next) |
1062 | if ((CHECK_FLAG(nh->flags, NEXTHOP_FLAG_FIB) | |
1063 | || CHECK_FLAG(nh->flags, NEXTHOP_FLAG_RECURSIVE)) | |
1064 | && CHECK_FLAG(nh->flags, NEXTHOP_FLAG_ACTIVE)) { | |
1065 | stream_putc(s, nh->type); | |
1066 | switch (nh->type) { | |
d62a17ae | 1067 | case NEXTHOP_TYPE_IPV4: |
aab09c10 | 1068 | case NEXTHOP_TYPE_IPV4_IFINDEX: |
0acf4df0 DS |
1069 | stream_put_in_addr(s, &nh->gate.ipv4); |
1070 | stream_putl(s, nh->ifindex); | |
d62a17ae | 1071 | break; |
1072 | case NEXTHOP_TYPE_IFINDEX: | |
0acf4df0 | 1073 | stream_putl(s, nh->ifindex); |
d62a17ae | 1074 | break; |
d62a17ae | 1075 | case NEXTHOP_TYPE_IPV6: |
d62a17ae | 1076 | case NEXTHOP_TYPE_IPV6_IFINDEX: |
0acf4df0 DS |
1077 | stream_put(s, &nh->gate.ipv6, 16); |
1078 | stream_putl(s, nh->ifindex); | |
d62a17ae | 1079 | break; |
1080 | default: | |
1081 | /* do nothing */ | |
1082 | break; | |
1083 | } | |
0acf4df0 DS |
1084 | if (nh->nh_label) { |
1085 | stream_putc(s, | |
1086 | nh->nh_label->num_labels); | |
1087 | if (nh->nh_label->num_labels) | |
1088 | stream_put( | |
1089 | s, | |
1090 | &nh->nh_label->label[0], | |
1091 | nh->nh_label->num_labels | |
1092 | * sizeof(mpls_label_t)); | |
1093 | } else | |
1094 | stream_putc(s, 0); | |
d62a17ae | 1095 | num++; |
1096 | } | |
1097 | stream_putc_at(s, nump, num); | |
1098 | } else { | |
05dd5aaf DS |
1099 | stream_putc(s, 0); // type |
1100 | stream_putw(s, 0); // instance | |
d62a17ae | 1101 | stream_putc(s, 0); // distance |
1102 | stream_putl(s, 0); // metric | |
1103 | stream_putc(s, 0); // nexthops | |
1104 | } | |
1105 | stream_putw_at(s, 0, stream_get_endp(s)); | |
1106 | ||
1107 | client->nh_last_upd_time = monotime(NULL); | |
1108 | client->last_write_cmd = cmd; | |
1002497a | 1109 | return zebra_server_send_message(client, s); |
fb018d25 DS |
1110 | } |
1111 | ||
d62a17ae | 1112 | static void print_nh(struct nexthop *nexthop, struct vty *vty) |
fb018d25 | 1113 | { |
d62a17ae | 1114 | char buf[BUFSIZ]; |
1115 | struct zebra_ns *zns = zebra_ns_lookup(NS_DEFAULT); | |
1116 | ||
1117 | switch (nexthop->type) { | |
1118 | case NEXTHOP_TYPE_IPV4: | |
1119 | case NEXTHOP_TYPE_IPV4_IFINDEX: | |
1120 | vty_out(vty, " via %s", inet_ntoa(nexthop->gate.ipv4)); | |
1121 | if (nexthop->ifindex) | |
1122 | vty_out(vty, ", %s", | |
1123 | ifindex2ifname_per_ns(zns, nexthop->ifindex)); | |
1124 | break; | |
1125 | case NEXTHOP_TYPE_IPV6: | |
1126 | case NEXTHOP_TYPE_IPV6_IFINDEX: | |
1127 | vty_out(vty, " %s", | |
1128 | inet_ntop(AF_INET6, &nexthop->gate.ipv6, buf, BUFSIZ)); | |
1129 | if (nexthop->ifindex) | |
1130 | vty_out(vty, ", via %s", | |
1131 | ifindex2ifname_per_ns(zns, nexthop->ifindex)); | |
1132 | break; | |
1133 | case NEXTHOP_TYPE_IFINDEX: | |
1134 | vty_out(vty, " is directly connected, %s", | |
1135 | ifindex2ifname_per_ns(zns, nexthop->ifindex)); | |
1136 | break; | |
1137 | case NEXTHOP_TYPE_BLACKHOLE: | |
1138 | vty_out(vty, " is directly connected, Null0"); | |
1139 | break; | |
1140 | default: | |
1141 | break; | |
1142 | } | |
1143 | vty_out(vty, "\n"); | |
fb018d25 DS |
1144 | } |
1145 | ||
d62a17ae | 1146 | static void print_rnh(struct route_node *rn, struct vty *vty) |
fb018d25 | 1147 | { |
d62a17ae | 1148 | struct rnh *rnh; |
1149 | struct nexthop *nexthop; | |
1150 | struct listnode *node; | |
1151 | struct zserv *client; | |
1152 | char buf[BUFSIZ]; | |
1153 | ||
1154 | rnh = rn->info; | |
1155 | vty_out(vty, "%s%s\n", | |
1156 | inet_ntop(rn->p.family, &rn->p.u.prefix, buf, BUFSIZ), | |
1157 | CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED) ? "(Connected)" | |
1158 | : ""); | |
1159 | if (rnh->state) { | |
1160 | vty_out(vty, " resolved via %s\n", | |
1161 | zebra_route_string(rnh->state->type)); | |
7ee30f28 | 1162 | for (nexthop = rnh->state->ng.nexthop; nexthop; |
d62a17ae | 1163 | nexthop = nexthop->next) |
1164 | print_nh(nexthop, vty); | |
1165 | } else | |
1166 | vty_out(vty, " unresolved%s\n", | |
1167 | CHECK_FLAG(rnh->flags, ZEBRA_NHT_CONNECTED) | |
1168 | ? "(Connected)" | |
1169 | : ""); | |
1170 | ||
1171 | vty_out(vty, " Client list:"); | |
1172 | for (ALL_LIST_ELEMENTS_RO(rnh->client_list, node, client)) | |
1173 | vty_out(vty, " %s(fd %d)%s", zebra_route_string(client->proto), | |
1174 | client->sock, | |
1175 | rnh->filtered[client->proto] ? "(filtered)" : ""); | |
1176 | if (!list_isempty(rnh->zebra_static_route_list)) | |
1177 | vty_out(vty, " zebra%s", | |
1178 | rnh->filtered[ZEBRA_ROUTE_STATIC] ? "(filtered)" : ""); | |
731a75fe RW |
1179 | if (!list_isempty(rnh->zebra_pseudowire_list)) |
1180 | vty_out(vty, " zebra[pseudowires]"); | |
d62a17ae | 1181 | vty_out(vty, "\n"); |
fb018d25 | 1182 | } |
bf094f69 QY |
1183 | |
1184 | static int zebra_cleanup_rnh_client(vrf_id_t vrf_id, int family, | |
1185 | struct zserv *client, rnh_type_t type) | |
1186 | { | |
1187 | struct route_table *ntable; | |
1188 | struct route_node *nrn; | |
1189 | struct rnh *rnh; | |
1190 | ||
1191 | if (IS_ZEBRA_DEBUG_NHT) | |
1192 | zlog_debug("%u: Client %s RNH cleanup for family %d type %d", | |
1193 | vrf_id, zebra_route_string(client->proto), family, | |
1194 | type); | |
1195 | ||
1196 | ntable = get_rnh_table(vrf_id, family, type); | |
1197 | if (!ntable) { | |
1198 | zlog_debug("cleanup_rnh_client: rnh table not found\n"); | |
1199 | return -1; | |
1200 | } | |
1201 | ||
1202 | for (nrn = route_top(ntable); nrn; nrn = route_next(nrn)) { | |
1203 | if (!nrn->info) | |
1204 | continue; | |
1205 | ||
1206 | rnh = nrn->info; | |
1207 | zebra_remove_rnh_client(rnh, client, type); | |
1208 | } | |
1209 | return 1; | |
1210 | } | |
1211 | ||
1212 | /* Cleanup registered nexthops (across VRFs) upon client disconnect. */ | |
453844ab | 1213 | static int zebra_client_cleanup_rnh(struct zserv *client) |
bf094f69 QY |
1214 | { |
1215 | struct vrf *vrf; | |
1216 | struct zebra_vrf *zvrf; | |
1217 | ||
1218 | RB_FOREACH (vrf, vrf_id_head, &vrfs_by_id) { | |
8b1766b1 QY |
1219 | zvrf = vrf->info; |
1220 | if (zvrf) { | |
bf094f69 QY |
1221 | zebra_cleanup_rnh_client(zvrf_id(zvrf), AF_INET, client, |
1222 | RNH_NEXTHOP_TYPE); | |
1223 | zebra_cleanup_rnh_client(zvrf_id(zvrf), AF_INET6, | |
1224 | client, RNH_NEXTHOP_TYPE); | |
1225 | zebra_cleanup_rnh_client(zvrf_id(zvrf), AF_INET, client, | |
1226 | RNH_IMPORT_CHECK_TYPE); | |
1227 | zebra_cleanup_rnh_client(zvrf_id(zvrf), AF_INET6, | |
1228 | client, RNH_IMPORT_CHECK_TYPE); | |
1229 | if (client->proto == ZEBRA_ROUTE_LDP) { | |
1230 | hash_iterate(zvrf->lsp_table, | |
1231 | mpls_ldp_lsp_uninstall_all, | |
1232 | zvrf->lsp_table); | |
1233 | mpls_ldp_ftn_uninstall_all(zvrf, AFI_IP); | |
1234 | mpls_ldp_ftn_uninstall_all(zvrf, AFI_IP6); | |
1235 | } | |
1236 | } | |
1237 | } | |
453844ab QY |
1238 | |
1239 | return 0; | |
bf094f69 | 1240 | } |