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8429abe0 RW |
1 | /* $OpenBSD$ */ |
2 | ||
3 | /* | |
4 | * Copyright (c) 2013, 2016 Renato Westphal <renato@openbsd.org> | |
5 | * Copyright (c) 2009 Michele Marchetto <michele@openbsd.org> | |
6 | * | |
7 | * Permission to use, copy, modify, and distribute this software for any | |
8 | * purpose with or without fee is hereby granted, provided that the above | |
9 | * copyright notice and this permission notice appear in all copies. | |
10 | * | |
11 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
12 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
13 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
14 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
15 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
16 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
17 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
18 | */ | |
19 | ||
eac6e3f0 | 20 | #include <zebra.h> |
8429abe0 RW |
21 | |
22 | #include "ldpd.h" | |
aff1743c | 23 | #include "ldpe.h" |
8429abe0 RW |
24 | #include "lde.h" |
25 | #include "log.h" | |
26 | ||
eac6e3f0 RW |
27 | #include "mpls.h" |
28 | ||
45926e58 | 29 | static __inline int fec_compare(const struct fec *, const struct fec *); |
8429abe0 RW |
30 | static int lde_nbr_is_nexthop(struct fec_node *, |
31 | struct lde_nbr *); | |
32 | static void fec_free(void *); | |
33 | static struct fec_node *fec_add(struct fec *fec); | |
34 | static struct fec_nh *fec_nh_add(struct fec_node *, int, union ldpd_addr *, | |
e132dea0 | 35 | ifindex_t, uint8_t, unsigned short); |
8429abe0 RW |
36 | static void fec_nh_del(struct fec_nh *); |
37 | ||
38 | RB_GENERATE(fec_tree, fec, entry, fec_compare) | |
39 | ||
40 | struct fec_tree ft = RB_INITIALIZER(&ft); | |
eac6e3f0 | 41 | struct thread *gc_timer; |
8429abe0 RW |
42 | |
43 | /* FEC tree functions */ | |
44 | void | |
45 | fec_init(struct fec_tree *fh) | |
46 | { | |
45926e58 | 47 | RB_INIT(fec_tree, fh); |
8429abe0 RW |
48 | } |
49 | ||
50 | static __inline int | |
45926e58 | 51 | fec_compare(const struct fec *a, const struct fec *b) |
8429abe0 RW |
52 | { |
53 | if (a->type < b->type) | |
54 | return (-1); | |
55 | if (a->type > b->type) | |
56 | return (1); | |
57 | ||
58 | switch (a->type) { | |
59 | case FEC_TYPE_IPV4: | |
60 | if (ntohl(a->u.ipv4.prefix.s_addr) < | |
61 | ntohl(b->u.ipv4.prefix.s_addr)) | |
62 | return (-1); | |
63 | if (ntohl(a->u.ipv4.prefix.s_addr) > | |
64 | ntohl(b->u.ipv4.prefix.s_addr)) | |
65 | return (1); | |
66 | if (a->u.ipv4.prefixlen < b->u.ipv4.prefixlen) | |
67 | return (-1); | |
68 | if (a->u.ipv4.prefixlen > b->u.ipv4.prefixlen) | |
69 | return (1); | |
70 | return (0); | |
71 | case FEC_TYPE_IPV6: | |
72 | if (memcmp(&a->u.ipv6.prefix, &b->u.ipv6.prefix, | |
73 | sizeof(struct in6_addr)) < 0) | |
74 | return (-1); | |
75 | if (memcmp(&a->u.ipv6.prefix, &b->u.ipv6.prefix, | |
76 | sizeof(struct in6_addr)) > 0) | |
77 | return (1); | |
78 | if (a->u.ipv6.prefixlen < b->u.ipv6.prefixlen) | |
79 | return (-1); | |
80 | if (a->u.ipv6.prefixlen > b->u.ipv6.prefixlen) | |
81 | return (1); | |
82 | return (0); | |
83 | case FEC_TYPE_PWID: | |
84 | if (a->u.pwid.type < b->u.pwid.type) | |
85 | return (-1); | |
86 | if (a->u.pwid.type > b->u.pwid.type) | |
87 | return (1); | |
88 | if (a->u.pwid.pwid < b->u.pwid.pwid) | |
89 | return (-1); | |
90 | if (a->u.pwid.pwid > b->u.pwid.pwid) | |
91 | return (1); | |
92 | if (ntohl(a->u.pwid.lsr_id.s_addr) < | |
93 | ntohl(b->u.pwid.lsr_id.s_addr)) | |
94 | return (-1); | |
95 | if (ntohl(a->u.pwid.lsr_id.s_addr) > | |
96 | ntohl(b->u.pwid.lsr_id.s_addr)) | |
97 | return (1); | |
98 | return (0); | |
99 | } | |
100 | ||
101 | return (-1); | |
102 | } | |
103 | ||
104 | struct fec * | |
105 | fec_find(struct fec_tree *fh, struct fec *f) | |
106 | { | |
107 | return (RB_FIND(fec_tree, fh, f)); | |
108 | } | |
109 | ||
110 | int | |
111 | fec_insert(struct fec_tree *fh, struct fec *f) | |
112 | { | |
113 | if (RB_INSERT(fec_tree, fh, f) != NULL) | |
114 | return (-1); | |
115 | return (0); | |
116 | } | |
117 | ||
118 | int | |
119 | fec_remove(struct fec_tree *fh, struct fec *f) | |
120 | { | |
121 | if (RB_REMOVE(fec_tree, fh, f) == NULL) { | |
122 | log_warnx("%s failed for %s", __func__, log_fec(f)); | |
123 | return (-1); | |
124 | } | |
125 | return (0); | |
126 | } | |
127 | ||
128 | void | |
129 | fec_clear(struct fec_tree *fh, void (*free_cb)(void *)) | |
130 | { | |
131 | struct fec *f; | |
132 | ||
55cd0f61 DS |
133 | while (!RB_EMPTY(fec_tree, fh)) { |
134 | f = RB_ROOT(fec_tree, fh); | |
135 | ||
8429abe0 RW |
136 | fec_remove(fh, f); |
137 | free_cb(f); | |
138 | } | |
139 | } | |
140 | ||
141 | /* routing table functions */ | |
142 | static int | |
143 | lde_nbr_is_nexthop(struct fec_node *fn, struct lde_nbr *ln) | |
144 | { | |
145 | struct fec_nh *fnh; | |
146 | ||
147 | LIST_FOREACH(fnh, &fn->nexthops, entry) | |
148 | if (lde_address_find(ln, fnh->af, &fnh->nexthop)) | |
149 | return (1); | |
150 | ||
151 | return (0); | |
152 | } | |
153 | ||
154 | void | |
155 | rt_dump(pid_t pid) | |
156 | { | |
157 | struct fec *f; | |
158 | struct fec_node *fn; | |
159 | struct lde_map *me; | |
160 | static struct ctl_rt rtctl; | |
161 | ||
162 | RB_FOREACH(f, fec_tree, &ft) { | |
163 | fn = (struct fec_node *)f; | |
164 | if (fn->local_label == NO_LABEL && | |
45926e58 | 165 | RB_EMPTY(lde_map_head, &fn->downstream)) |
8429abe0 RW |
166 | continue; |
167 | ||
0f7b5df9 | 168 | memset(&rtctl, 0, sizeof(rtctl)); |
8429abe0 RW |
169 | switch (fn->fec.type) { |
170 | case FEC_TYPE_IPV4: | |
171 | rtctl.af = AF_INET; | |
172 | rtctl.prefix.v4 = fn->fec.u.ipv4.prefix; | |
173 | rtctl.prefixlen = fn->fec.u.ipv4.prefixlen; | |
174 | break; | |
175 | case FEC_TYPE_IPV6: | |
176 | rtctl.af = AF_INET6; | |
177 | rtctl.prefix.v6 = fn->fec.u.ipv6.prefix; | |
178 | rtctl.prefixlen = fn->fec.u.ipv6.prefixlen; | |
179 | break; | |
180 | default: | |
181 | continue; | |
182 | } | |
183 | ||
184 | rtctl.local_label = fn->local_label; | |
45926e58 | 185 | if (RB_EMPTY(lde_map_head, &fn->downstream)) { |
8429abe0 RW |
186 | rtctl.in_use = 0; |
187 | rtctl.nexthop.s_addr = INADDR_ANY; | |
188 | rtctl.remote_label = NO_LABEL; | |
0f7b5df9 RW |
189 | rtctl.no_downstream = 1; |
190 | } | |
191 | lde_imsg_compose_ldpe(IMSG_CTL_SHOW_LIB_BEGIN, 0, pid, &rtctl, | |
192 | sizeof(rtctl)); | |
8429abe0 | 193 | |
0f7b5df9 RW |
194 | RB_FOREACH(me, lde_map_head, &fn->upstream) { |
195 | rtctl.nexthop = me->nexthop->id; | |
196 | lde_imsg_compose_ldpe(IMSG_CTL_SHOW_LIB_SENT, 0, pid, | |
197 | &rtctl, sizeof(rtctl)); | |
198 | } | |
199 | ||
200 | RB_FOREACH(me, lde_map_head, &fn->downstream) { | |
201 | rtctl.in_use = lde_nbr_is_nexthop(fn, me->nexthop); | |
202 | rtctl.nexthop = me->nexthop->id; | |
203 | rtctl.remote_label = me->map.label; | |
204 | lde_imsg_compose_ldpe(IMSG_CTL_SHOW_LIB_RCVD, 0, pid, | |
8429abe0 RW |
205 | &rtctl, sizeof(rtctl)); |
206 | } | |
0f7b5df9 RW |
207 | lde_imsg_compose_ldpe(IMSG_CTL_SHOW_LIB_END, 0, pid, &rtctl, |
208 | sizeof(rtctl)); | |
8429abe0 RW |
209 | } |
210 | } | |
211 | ||
212 | void | |
213 | fec_snap(struct lde_nbr *ln) | |
214 | { | |
215 | struct fec *f; | |
216 | struct fec_node *fn; | |
217 | ||
218 | RB_FOREACH(f, fec_tree, &ft) { | |
219 | fn = (struct fec_node *)f; | |
220 | if (fn->local_label == NO_LABEL) | |
221 | continue; | |
222 | ||
223 | lde_send_labelmapping(ln, fn, 0); | |
224 | } | |
225 | ||
226 | lde_imsg_compose_ldpe(IMSG_MAPPING_ADD_END, ln->peerid, 0, NULL, 0); | |
227 | } | |
228 | ||
229 | static void | |
230 | fec_free(void *arg) | |
231 | { | |
232 | struct fec_node *fn = arg; | |
233 | struct fec_nh *fnh; | |
234 | ||
11bf8e13 | 235 | while ((fnh = LIST_FIRST(&fn->nexthops))) { |
8429abe0 | 236 | fec_nh_del(fnh); |
11bf8e13 RW |
237 | assert(fnh != LIST_FIRST(&fn->nexthops)); |
238 | } | |
45926e58 | 239 | if (!RB_EMPTY(lde_map_head, &fn->downstream)) |
8429abe0 RW |
240 | log_warnx("%s: fec %s downstream list not empty", __func__, |
241 | log_fec(&fn->fec)); | |
45926e58 | 242 | if (!RB_EMPTY(lde_map_head, &fn->upstream)) |
8429abe0 RW |
243 | log_warnx("%s: fec %s upstream list not empty", __func__, |
244 | log_fec(&fn->fec)); | |
245 | ||
246 | free(fn); | |
247 | } | |
248 | ||
249 | void | |
250 | fec_tree_clear(void) | |
251 | { | |
252 | fec_clear(&ft, fec_free); | |
253 | } | |
254 | ||
255 | static struct fec_node * | |
256 | fec_add(struct fec *fec) | |
257 | { | |
258 | struct fec_node *fn; | |
259 | ||
260 | fn = calloc(1, sizeof(*fn)); | |
261 | if (fn == NULL) | |
262 | fatal(__func__); | |
263 | ||
264 | fn->fec = *fec; | |
265 | fn->local_label = NO_LABEL; | |
45926e58 RZ |
266 | RB_INIT(lde_map_head, &fn->upstream); |
267 | RB_INIT(lde_map_head, &fn->downstream); | |
8429abe0 RW |
268 | LIST_INIT(&fn->nexthops); |
269 | ||
4272a064 KS |
270 | if (fec->type == FEC_TYPE_PWID) |
271 | fn->pw_remote_status = PW_FORWARDING; | |
272 | ||
8429abe0 RW |
273 | if (fec_insert(&ft, &fn->fec)) |
274 | log_warnx("failed to add %s to ft tree", | |
275 | log_fec(&fn->fec)); | |
276 | ||
277 | return (fn); | |
278 | } | |
279 | ||
280 | struct fec_nh * | |
281 | fec_nh_find(struct fec_node *fn, int af, union ldpd_addr *nexthop, | |
e132dea0 | 282 | ifindex_t ifindex, uint8_t route_type, unsigned short route_instance) |
8429abe0 RW |
283 | { |
284 | struct fec_nh *fnh; | |
285 | ||
286 | LIST_FOREACH(fnh, &fn->nexthops, entry) | |
287 | if (fnh->af == af && | |
288 | ldp_addrcmp(af, &fnh->nexthop, nexthop) == 0 && | |
88d88a9c | 289 | fnh->ifindex == ifindex && |
e132dea0 RW |
290 | fnh->route_type == route_type && |
291 | fnh->route_instance == route_instance) | |
8429abe0 RW |
292 | return (fnh); |
293 | ||
294 | return (NULL); | |
295 | } | |
296 | ||
297 | static struct fec_nh * | |
298 | fec_nh_add(struct fec_node *fn, int af, union ldpd_addr *nexthop, | |
e132dea0 | 299 | ifindex_t ifindex, uint8_t route_type, unsigned short route_instance) |
8429abe0 RW |
300 | { |
301 | struct fec_nh *fnh; | |
302 | ||
303 | fnh = calloc(1, sizeof(*fnh)); | |
304 | if (fnh == NULL) | |
305 | fatal(__func__); | |
306 | ||
307 | fnh->af = af; | |
308 | fnh->nexthop = *nexthop; | |
88d88a9c | 309 | fnh->ifindex = ifindex; |
8429abe0 | 310 | fnh->remote_label = NO_LABEL; |
e132dea0 RW |
311 | fnh->route_type = route_type; |
312 | fnh->route_instance = route_instance; | |
8429abe0 RW |
313 | LIST_INSERT_HEAD(&fn->nexthops, fnh, entry); |
314 | ||
315 | return (fnh); | |
316 | } | |
317 | ||
318 | static void | |
319 | fec_nh_del(struct fec_nh *fnh) | |
320 | { | |
321 | LIST_REMOVE(fnh, entry); | |
322 | free(fnh); | |
323 | } | |
324 | ||
8429abe0 RW |
325 | void |
326 | lde_kernel_insert(struct fec *fec, int af, union ldpd_addr *nexthop, | |
e132dea0 RW |
327 | ifindex_t ifindex, uint8_t route_type, unsigned short route_instance, |
328 | int connected, void *data) | |
8429abe0 RW |
329 | { |
330 | struct fec_node *fn; | |
331 | struct fec_nh *fnh; | |
aff1743c | 332 | struct iface *iface; |
8429abe0 RW |
333 | |
334 | fn = (struct fec_node *)fec_find(&ft, fec); | |
335 | if (fn == NULL) | |
336 | fn = fec_add(fec); | |
8cb1fc45 | 337 | if (data) |
8429abe0 RW |
338 | fn->data = data; |
339 | ||
e132dea0 | 340 | fnh = fec_nh_find(fn, af, nexthop, ifindex, route_type, route_instance); |
aff1743c | 341 | if (fnh == NULL) { |
e132dea0 RW |
342 | fnh = fec_nh_add(fn, af, nexthop, ifindex, route_type, |
343 | route_instance); | |
aff1743c KS |
344 | /* |
345 | * Ordered Control: if not a connected route and not a route | |
346 | * learned over an interface not running LDP and not a PW | |
347 | * then mark to wait until we receive labelmap msg before | |
348 | * installing in kernel and sending to peer | |
349 | */ | |
350 | iface = if_lookup(ldeconf, ifindex); | |
351 | if ((ldeconf->flags & F_LDPD_ORDERED_CONTROL) && | |
352 | !connected && iface != NULL && fec->type != FEC_TYPE_PWID) | |
353 | fnh->flags |= F_FEC_NH_DEFER; | |
354 | } | |
355 | ||
134970a2 | 356 | fnh->flags |= F_FEC_NH_NEW; |
8cb1fc45 RW |
357 | if (connected) |
358 | fnh->flags |= F_FEC_NH_CONNECTED; | |
8429abe0 RW |
359 | } |
360 | ||
361 | void | |
362 | lde_kernel_remove(struct fec *fec, int af, union ldpd_addr *nexthop, | |
e132dea0 | 363 | ifindex_t ifindex, uint8_t route_type, unsigned short route_instance) |
8429abe0 RW |
364 | { |
365 | struct fec_node *fn; | |
366 | struct fec_nh *fnh; | |
367 | ||
368 | fn = (struct fec_node *)fec_find(&ft, fec); | |
369 | if (fn == NULL) | |
370 | /* route lost */ | |
371 | return; | |
e132dea0 | 372 | fnh = fec_nh_find(fn, af, nexthop, ifindex, route_type, route_instance); |
8429abe0 RW |
373 | if (fnh == NULL) |
374 | /* route lost */ | |
375 | return; | |
376 | ||
8429abe0 RW |
377 | lde_send_delete_klabel(fn, fnh); |
378 | fec_nh_del(fnh); | |
8429abe0 RW |
379 | } |
380 | ||
134970a2 RW |
381 | /* |
382 | * Whenever a route is changed, zebra advertises its new version without | |
383 | * withdrawing the old one. So, after processing a ZEBRA_REDISTRIBUTE_IPV[46]_ADD | |
384 | * message, we need to check for nexthops that were removed and, for each of | |
385 | * them (if any), withdraw the associated labels from zebra. | |
386 | */ | |
387 | void | |
8cb1fc45 | 388 | lde_kernel_update(struct fec *fec) |
134970a2 RW |
389 | { |
390 | struct fec_node *fn; | |
391 | struct fec_nh *fnh, *safe; | |
8cb1fc45 RW |
392 | struct lde_nbr *ln; |
393 | struct lde_map *me; | |
aff1743c | 394 | struct iface *iface; |
134970a2 RW |
395 | |
396 | fn = (struct fec_node *)fec_find(&ft, fec); | |
397 | if (fn == NULL) | |
398 | return; | |
399 | ||
400 | LIST_FOREACH_SAFE(fnh, &fn->nexthops, entry, safe) { | |
aff1743c | 401 | if (fnh->flags & F_FEC_NH_NEW) { |
134970a2 | 402 | fnh->flags &= ~F_FEC_NH_NEW; |
aff1743c KS |
403 | /* |
404 | * if LDP configured on interface or a static route | |
405 | * clear flag else treat fec as a connected route | |
406 | */ | |
95535717 | 407 | if (ldeconf->flags & F_LDPD_ENABLED) { |
408 | iface = if_lookup(ldeconf,fnh->ifindex); | |
409 | if (fnh->flags & F_FEC_NH_CONNECTED || | |
410 | iface || | |
411 | fnh->route_type == ZEBRA_ROUTE_STATIC) | |
412 | fnh->flags &=~F_FEC_NH_NO_LDP; | |
413 | else | |
414 | fnh->flags |= F_FEC_NH_NO_LDP; | |
415 | } else | |
aff1743c KS |
416 | fnh->flags |= F_FEC_NH_NO_LDP; |
417 | } else { | |
8cb1fc45 RW |
418 | lde_send_delete_klabel(fn, fnh); |
419 | fec_nh_del(fnh); | |
420 | } | |
421 | } | |
422 | ||
423 | if (LIST_EMPTY(&fn->nexthops)) { | |
0bcc2916 RW |
424 | RB_FOREACH(ln, nbr_tree, &lde_nbrs) |
425 | lde_send_labelwithdraw(ln, fn, NULL, NULL); | |
8cb1fc45 | 426 | fn->data = NULL; |
8cb1fc45 | 427 | |
095f12f9 RW |
428 | /* |
429 | * Do not deallocate the local label now, do that only in the | |
430 | * LIB garbage collector. This will prevent ldpd from changing | |
431 | * the input label of some prefixes too often when running on | |
432 | * an unstable network. Also, restart the garbage collector | |
433 | * timer so that labels are deallocated only when the network | |
434 | * is stabilized. | |
435 | */ | |
436 | lde_gc_start_timer(); | |
437 | } else { | |
8cb1fc45 | 438 | fn->local_label = lde_update_label(fn); |
b4fcca6b | 439 | if (fn->local_label != NO_LABEL) |
8cb1fc45 RW |
440 | /* FEC.1: perform lsr label distribution procedure */ |
441 | RB_FOREACH(ln, nbr_tree, &lde_nbrs) | |
442 | lde_send_labelmapping(ln, fn, 1); | |
8cb1fc45 RW |
443 | } |
444 | ||
95535717 | 445 | /* if no label created yet then don't try to program labeled route */ |
446 | if (fn->local_label == NO_LABEL) | |
447 | return; | |
448 | ||
8cb1fc45 RW |
449 | LIST_FOREACH(fnh, &fn->nexthops, entry) { |
450 | lde_send_change_klabel(fn, fnh); | |
451 | ||
452 | switch (fn->fec.type) { | |
453 | case FEC_TYPE_IPV4: | |
454 | case FEC_TYPE_IPV6: | |
455 | ln = lde_nbr_find_by_addr(fnh->af, &fnh->nexthop); | |
456 | break; | |
457 | case FEC_TYPE_PWID: | |
458 | ln = lde_nbr_find_by_lsrid(fn->fec.u.pwid.lsr_id); | |
459 | break; | |
460 | default: | |
461 | ln = NULL; | |
462 | break; | |
463 | } | |
464 | ||
465 | if (ln) { | |
466 | /* FEC.2 */ | |
467 | me = (struct lde_map *)fec_find(&ln->recv_map, &fn->fec); | |
468 | if (me) | |
469 | /* FEC.5 */ | |
4272a064 | 470 | lde_check_mapping(&me->map, ln, 0); |
8cb1fc45 | 471 | } |
134970a2 RW |
472 | } |
473 | } | |
474 | ||
8429abe0 | 475 | void |
4272a064 | 476 | lde_check_mapping(struct map *map, struct lde_nbr *ln, int rcvd_label_mapping) |
8429abe0 RW |
477 | { |
478 | struct fec fec; | |
479 | struct fec_node *fn; | |
480 | struct fec_nh *fnh; | |
481 | struct lde_req *lre; | |
482 | struct lde_map *me; | |
483 | struct l2vpn_pw *pw; | |
aff1743c | 484 | bool send_map = false; |
8429abe0 RW |
485 | |
486 | lde_map2fec(map, ln->id, &fec); | |
45a8eba9 RW |
487 | |
488 | switch (fec.type) { | |
489 | case FEC_TYPE_IPV4: | |
490 | if (lde_acl_check(ldeconf->ipv4.acl_label_accept_from, | |
491 | AF_INET, (union ldpd_addr *)&ln->id, 32) != FILTER_PERMIT) | |
492 | return; | |
493 | if (lde_acl_check(ldeconf->ipv4.acl_label_accept_for, | |
494 | AF_INET, (union ldpd_addr *)&fec.u.ipv4.prefix, | |
495 | fec.u.ipv4.prefixlen) != FILTER_PERMIT) | |
496 | return; | |
497 | break; | |
498 | case FEC_TYPE_IPV6: | |
499 | if (lde_acl_check(ldeconf->ipv6.acl_label_accept_from, | |
500 | AF_INET, (union ldpd_addr *)&ln->id, 32) != FILTER_PERMIT) | |
501 | return; | |
502 | if (lde_acl_check(ldeconf->ipv6.acl_label_accept_for, | |
503 | AF_INET6, (union ldpd_addr *)&fec.u.ipv6.prefix, | |
504 | fec.u.ipv6.prefixlen) != FILTER_PERMIT) | |
505 | return; | |
506 | break; | |
507 | default: | |
508 | break; | |
509 | } | |
510 | ||
8429abe0 RW |
511 | fn = (struct fec_node *)fec_find(&ft, &fec); |
512 | if (fn == NULL) | |
513 | fn = fec_add(&fec); | |
514 | ||
515 | /* LMp.1: first check if we have a pending request running */ | |
516 | lre = (struct lde_req *)fec_find(&ln->sent_req, &fn->fec); | |
517 | if (lre) | |
518 | /* LMp.2: delete record of outstanding label request */ | |
519 | lde_req_del(ln, lre, 1); | |
520 | ||
521 | /* RFC 4447 control word and status tlv negotiation */ | |
4272a064 KS |
522 | if (map->type == MAP_TYPE_PWID && l2vpn_pw_negotiate(ln, fn, map)) { |
523 | if (rcvd_label_mapping && map->flags & F_MAP_PW_STATUS) | |
524 | fn->pw_remote_status = map->pw_status; | |
525 | ||
8429abe0 | 526 | return; |
4272a064 | 527 | } |
8429abe0 RW |
528 | |
529 | /* | |
530 | * LMp.3 - LMp.8: loop detection - unnecessary for frame-mode | |
531 | * mpls networks. | |
532 | */ | |
533 | ||
534 | /* LMp.9 */ | |
535 | me = (struct lde_map *)fec_find(&ln->recv_map, &fn->fec); | |
536 | if (me) { | |
537 | /* LMp.10 */ | |
538 | if (me->map.label != map->label && lre == NULL) { | |
539 | /* LMp.10a */ | |
0bcc2916 | 540 | lde_send_labelrelease(ln, fn, NULL, me->map.label); |
8429abe0 RW |
541 | |
542 | /* | |
543 | * Can not use lde_nbr_find_by_addr() because there's | |
544 | * the possibility of multipath. | |
545 | */ | |
546 | LIST_FOREACH(fnh, &fn->nexthops, entry) { | |
547 | if (lde_address_find(ln, fnh->af, | |
548 | &fnh->nexthop) == NULL) | |
549 | continue; | |
550 | ||
551 | lde_send_delete_klabel(fn, fnh); | |
552 | fnh->remote_label = NO_LABEL; | |
553 | } | |
554 | } | |
555 | } | |
556 | ||
557 | /* | |
558 | * LMp.11 - 12: consider multiple nexthops in order to | |
559 | * support multipath | |
560 | */ | |
561 | LIST_FOREACH(fnh, &fn->nexthops, entry) { | |
562 | /* LMp.15: install FEC in FIB */ | |
563 | switch (fec.type) { | |
564 | case FEC_TYPE_IPV4: | |
565 | case FEC_TYPE_IPV6: | |
566 | if (!lde_address_find(ln, fnh->af, &fnh->nexthop)) | |
567 | continue; | |
568 | ||
aff1743c KS |
569 | /* |
570 | * Ordered Control: labelmap msg received from | |
571 | * NH so clear flag and send labelmap msg to | |
572 | * peer | |
573 | */ | |
574 | if (ldeconf->flags & F_LDPD_ORDERED_CONTROL) { | |
575 | send_map = true; | |
576 | fnh->flags &= ~F_FEC_NH_DEFER; | |
577 | } | |
8429abe0 | 578 | fnh->remote_label = map->label; |
95535717 | 579 | if (fn->local_label != NO_LABEL) |
580 | lde_send_change_klabel(fn, fnh); | |
8429abe0 RW |
581 | break; |
582 | case FEC_TYPE_PWID: | |
583 | pw = (struct l2vpn_pw *) fn->data; | |
584 | if (pw == NULL) | |
585 | continue; | |
586 | ||
587 | pw->remote_group = map->fec.pwid.group_id; | |
588 | if (map->flags & F_MAP_PW_IFMTU) | |
589 | pw->remote_mtu = map->fec.pwid.ifmtu; | |
4272a064 | 590 | if (rcvd_label_mapping && map->flags & F_MAP_PW_STATUS) { |
8429abe0 | 591 | pw->remote_status = map->pw_status; |
4272a064 KS |
592 | fn->pw_remote_status = map->pw_status; |
593 | } | |
87b5f1b7 RW |
594 | else |
595 | pw->remote_status = PW_FORWARDING; | |
8429abe0 RW |
596 | fnh->remote_label = map->label; |
597 | if (l2vpn_pw_ok(pw, fnh)) | |
598 | lde_send_change_klabel(fn, fnh); | |
599 | break; | |
600 | default: | |
601 | break; | |
602 | } | |
8429abe0 RW |
603 | } |
604 | /* LMp.13 & LMp.16: Record the mapping from this peer */ | |
605 | if (me == NULL) | |
606 | me = lde_map_add(ln, fn, 0); | |
607 | me->map = *map; | |
608 | ||
8429abe0 RW |
609 | /* |
610 | * LMp.17 - LMp.27 are unnecessary since we don't need to implement | |
611 | * loop detection. LMp.28 - LMp.30 are unnecessary because we are | |
612 | * merging capable. | |
613 | */ | |
aff1743c KS |
614 | |
615 | /* | |
616 | * Ordered Control: just received a labelmap for this fec from NH so | |
617 | * need to send labelmap to all peers | |
618 | * LMp.20 - LMp21 Execute procedure to send Label Mapping | |
619 | */ | |
620 | if (send_map && fn->local_label != NO_LABEL) | |
621 | RB_FOREACH(ln, nbr_tree, &lde_nbrs) | |
622 | lde_send_labelmapping(ln, fn, 1); | |
8429abe0 RW |
623 | } |
624 | ||
625 | void | |
626 | lde_check_request(struct map *map, struct lde_nbr *ln) | |
627 | { | |
628 | struct fec fec; | |
629 | struct lde_req *lre; | |
630 | struct fec_node *fn; | |
631 | struct fec_nh *fnh; | |
632 | ||
d4afb819 RW |
633 | /* wildcard label request */ |
634 | if (map->type == MAP_TYPE_TYPED_WCARD) { | |
635 | lde_check_request_wcard(map, ln); | |
636 | return; | |
637 | } | |
638 | ||
8429abe0 RW |
639 | /* LRq.1: skip loop detection (not necessary) */ |
640 | ||
641 | /* LRq.2: is there a next hop for fec? */ | |
642 | lde_map2fec(map, ln->id, &fec); | |
643 | fn = (struct fec_node *)fec_find(&ft, &fec); | |
644 | if (fn == NULL || LIST_EMPTY(&fn->nexthops)) { | |
645 | /* LRq.5: send No Route notification */ | |
05aac414 | 646 | lde_send_notification(ln, S_NO_ROUTE, map->msg_id, |
8429abe0 RW |
647 | htons(MSG_TYPE_LABELREQUEST)); |
648 | return; | |
649 | } | |
650 | ||
651 | /* LRq.3: is MsgSource the next hop? */ | |
652 | LIST_FOREACH(fnh, &fn->nexthops, entry) { | |
653 | switch (fec.type) { | |
654 | case FEC_TYPE_IPV4: | |
655 | case FEC_TYPE_IPV6: | |
656 | if (!lde_address_find(ln, fnh->af, &fnh->nexthop)) | |
657 | continue; | |
658 | ||
659 | /* LRq.4: send Loop Detected notification */ | |
05aac414 RW |
660 | lde_send_notification(ln, S_LOOP_DETECTED, map->msg_id, |
661 | htons(MSG_TYPE_LABELREQUEST)); | |
8429abe0 RW |
662 | return; |
663 | default: | |
664 | break; | |
665 | } | |
666 | } | |
667 | ||
668 | /* LRq.6: first check if we have a pending request running */ | |
669 | lre = (struct lde_req *)fec_find(&ln->recv_req, &fn->fec); | |
670 | if (lre != NULL) | |
671 | /* LRq.7: duplicate request */ | |
672 | return; | |
673 | ||
674 | /* LRq.8: record label request */ | |
675 | lre = lde_req_add(ln, &fn->fec, 0); | |
676 | if (lre != NULL) | |
677 | lre->msg_id = ntohl(map->msg_id); | |
678 | ||
679 | /* LRq.9: perform LSR label distribution */ | |
680 | lde_send_labelmapping(ln, fn, 1); | |
681 | ||
682 | /* | |
683 | * LRq.10: do nothing (Request Never) since we use liberal | |
684 | * label retention. | |
685 | * LRq.11 - 12 are unnecessary since we are merging capable. | |
686 | */ | |
687 | } | |
688 | ||
d4afb819 RW |
689 | void |
690 | lde_check_request_wcard(struct map *map, struct lde_nbr *ln) | |
691 | { | |
692 | struct fec *f; | |
693 | struct fec_node *fn; | |
694 | struct lde_req *lre; | |
695 | ||
696 | RB_FOREACH(f, fec_tree, &ft) { | |
697 | fn = (struct fec_node *)f; | |
698 | ||
699 | /* only a typed wildcard is possible here */ | |
700 | if (lde_wildcard_apply(map, &fn->fec, NULL) == 0) | |
701 | continue; | |
702 | ||
703 | /* LRq.2: is there a next hop for fec? */ | |
704 | if (LIST_EMPTY(&fn->nexthops)) | |
705 | continue; | |
706 | ||
707 | /* LRq.6: first check if we have a pending request running */ | |
708 | lre = (struct lde_req *)fec_find(&ln->recv_req, &fn->fec); | |
709 | if (lre != NULL) | |
710 | /* LRq.7: duplicate request */ | |
711 | continue; | |
712 | ||
713 | /* LRq.8: record label request */ | |
714 | lre = lde_req_add(ln, &fn->fec, 0); | |
715 | if (lre != NULL) | |
716 | lre->msg_id = ntohl(map->msg_id); | |
717 | ||
718 | /* LRq.9: perform LSR label distribution */ | |
719 | lde_send_labelmapping(ln, fn, 1); | |
720 | } | |
721 | } | |
722 | ||
8429abe0 RW |
723 | void |
724 | lde_check_release(struct map *map, struct lde_nbr *ln) | |
725 | { | |
726 | struct fec fec; | |
727 | struct fec_node *fn; | |
728 | struct lde_wdraw *lw; | |
729 | struct lde_map *me; | |
7c2abbd7 | 730 | struct fec *pending_map; |
8429abe0 | 731 | |
0bcc2916 RW |
732 | /* wildcard label release */ |
733 | if (map->type == MAP_TYPE_WILDCARD || | |
d4afb819 | 734 | map->type == MAP_TYPE_TYPED_WCARD || |
0bcc2916 RW |
735 | (map->type == MAP_TYPE_PWID && !(map->flags & F_MAP_PW_ID))) { |
736 | lde_check_release_wcard(map, ln); | |
8429abe0 | 737 | return; |
0bcc2916 | 738 | } |
8429abe0 RW |
739 | |
740 | lde_map2fec(map, ln->id, &fec); | |
741 | fn = (struct fec_node *)fec_find(&ft, &fec); | |
742 | /* LRl.1: does FEC match a known FEC? */ | |
743 | if (fn == NULL) | |
744 | return; | |
745 | ||
7c2abbd7 RW |
746 | /* LRl.6: check sent map list and remove it if available */ |
747 | me = (struct lde_map *)fec_find(&ln->sent_map, &fn->fec); | |
748 | if (me && (map->label == NO_LABEL || map->label == me->map.label)) | |
749 | lde_map_del(ln, me, 1); | |
750 | ||
8429abe0 RW |
751 | /* LRl.3: first check if we have a pending withdraw running */ |
752 | lw = (struct lde_wdraw *)fec_find(&ln->sent_wdraw, &fn->fec); | |
be8e0d31 | 753 | if (lw && (map->label == NO_LABEL || map->label == lw->label)) { |
8429abe0 RW |
754 | /* LRl.4: delete record of outstanding label withdraw */ |
755 | lde_wdraw_del(ln, lw); | |
8429abe0 | 756 | |
7c2abbd7 RW |
757 | /* send pending label mapping if any */ |
758 | pending_map = fec_find(&ln->sent_map_pending, &fn->fec); | |
759 | if (pending_map) { | |
760 | lde_send_labelmapping(ln, fn, 1); | |
761 | lde_map_pending_del(ln, pending_map); | |
762 | } | |
763 | } | |
8429abe0 RW |
764 | |
765 | /* | |
766 | * LRl.11 - 13 are unnecessary since we remove the label from | |
767 | * forwarding/switching as soon as the FEC is unreachable. | |
768 | */ | |
769 | } | |
770 | ||
771 | void | |
772 | lde_check_release_wcard(struct map *map, struct lde_nbr *ln) | |
773 | { | |
774 | struct fec *f; | |
775 | struct fec_node *fn; | |
776 | struct lde_wdraw *lw; | |
777 | struct lde_map *me; | |
7c2abbd7 | 778 | struct fec *pending_map; |
8429abe0 RW |
779 | |
780 | RB_FOREACH(f, fec_tree, &ft) { | |
781 | fn = (struct fec_node *)f; | |
0bcc2916 RW |
782 | me = (struct lde_map *)fec_find(&ln->sent_map, &fn->fec); |
783 | ||
784 | /* LRl.1: does FEC match a known FEC? */ | |
785 | if (lde_wildcard_apply(map, &fn->fec, me) == 0) | |
786 | continue; | |
8429abe0 | 787 | |
7c2abbd7 RW |
788 | /* LRl.6: check sent map list and remove it if available */ |
789 | if (me && | |
790 | (map->label == NO_LABEL || map->label == me->map.label)) | |
791 | lde_map_del(ln, me, 1); | |
792 | ||
8429abe0 RW |
793 | /* LRl.3: first check if we have a pending withdraw running */ |
794 | lw = (struct lde_wdraw *)fec_find(&ln->sent_wdraw, &fn->fec); | |
be8e0d31 | 795 | if (lw && (map->label == NO_LABEL || map->label == lw->label)) { |
8429abe0 RW |
796 | /* LRl.4: delete record of outstanding lbl withdraw */ |
797 | lde_wdraw_del(ln, lw); | |
8429abe0 | 798 | |
7c2abbd7 RW |
799 | /* send pending label mapping if any */ |
800 | pending_map = fec_find(&ln->sent_map_pending, &fn->fec); | |
801 | if (pending_map) { | |
802 | lde_send_labelmapping(ln, fn, 1); | |
803 | lde_map_pending_del(ln, pending_map); | |
804 | } | |
805 | } | |
8429abe0 RW |
806 | |
807 | /* | |
808 | * LRl.11 - 13 are unnecessary since we remove the label from | |
809 | * forwarding/switching as soon as the FEC is unreachable. | |
810 | */ | |
811 | } | |
812 | } | |
813 | ||
814 | void | |
815 | lde_check_withdraw(struct map *map, struct lde_nbr *ln) | |
816 | { | |
817 | struct fec fec; | |
818 | struct fec_node *fn; | |
819 | struct fec_nh *fnh; | |
820 | struct lde_map *me; | |
821 | struct l2vpn_pw *pw; | |
aff1743c | 822 | struct lde_nbr *lnbr; |
8429abe0 | 823 | |
0bcc2916 RW |
824 | /* wildcard label withdraw */ |
825 | if (map->type == MAP_TYPE_WILDCARD || | |
d4afb819 | 826 | map->type == MAP_TYPE_TYPED_WCARD || |
0bcc2916 RW |
827 | (map->type == MAP_TYPE_PWID && !(map->flags & F_MAP_PW_ID))) { |
828 | lde_check_withdraw_wcard(map, ln); | |
8429abe0 | 829 | return; |
0bcc2916 | 830 | } |
8429abe0 RW |
831 | |
832 | lde_map2fec(map, ln->id, &fec); | |
833 | fn = (struct fec_node *)fec_find(&ft, &fec); | |
834 | if (fn == NULL) | |
835 | fn = fec_add(&fec); | |
836 | ||
837 | /* LWd.1: remove label from forwarding/switching use */ | |
838 | LIST_FOREACH(fnh, &fn->nexthops, entry) { | |
839 | switch (fec.type) { | |
840 | case FEC_TYPE_IPV4: | |
841 | case FEC_TYPE_IPV6: | |
842 | if (!lde_address_find(ln, fnh->af, &fnh->nexthop)) | |
843 | continue; | |
844 | break; | |
845 | case FEC_TYPE_PWID: | |
846 | pw = (struct l2vpn_pw *) fn->data; | |
847 | if (pw == NULL) | |
848 | continue; | |
87b5f1b7 | 849 | pw->remote_status = PW_NOT_FORWARDING; |
8429abe0 RW |
850 | break; |
851 | default: | |
852 | break; | |
853 | } | |
be8e0d31 RW |
854 | if (map->label != NO_LABEL && map->label != fnh->remote_label) |
855 | continue; | |
856 | ||
8429abe0 RW |
857 | lde_send_delete_klabel(fn, fnh); |
858 | fnh->remote_label = NO_LABEL; | |
859 | } | |
860 | ||
861 | /* LWd.2: send label release */ | |
0bcc2916 | 862 | lde_send_labelrelease(ln, fn, NULL, map->label); |
8429abe0 RW |
863 | |
864 | /* LWd.3: check previously received label mapping */ | |
865 | me = (struct lde_map *)fec_find(&ln->recv_map, &fn->fec); | |
866 | if (me && (map->label == NO_LABEL || map->label == me->map.label)) | |
867 | /* LWd.4: remove record of previously received lbl mapping */ | |
868 | lde_map_del(ln, me, 0); | |
8dfdf235 | 869 | else |
870 | /* LWd.13 done */ | |
871 | return; | |
aff1743c KS |
872 | |
873 | /* Ordered Control: additional withdraw steps */ | |
874 | if (ldeconf->flags & F_LDPD_ORDERED_CONTROL) { | |
875 | /* LWd.8: for each neighbor other that src of withdraw msg */ | |
876 | RB_FOREACH(lnbr, nbr_tree, &lde_nbrs) { | |
877 | if (ln->peerid == lnbr->peerid) | |
878 | continue; | |
879 | ||
880 | /* LWd.9: check if previously sent a label mapping */ | |
881 | me = (struct lde_map *)fec_find(&lnbr->sent_map, | |
882 | &fn->fec); | |
8dfdf235 | 883 | |
aff1743c KS |
884 | /* |
885 | * LWd.10: does label sent to peer "map" to withdraw | |
886 | * label | |
887 | */ | |
8dfdf235 | 888 | if (me && lde_nbr_is_nexthop(fn, lnbr)) |
aff1743c KS |
889 | /* LWd.11: send label withdraw */ |
890 | lde_send_labelwithdraw(lnbr, fn, NULL, NULL); | |
891 | } | |
892 | } | |
8dfdf235 | 893 | |
8429abe0 RW |
894 | } |
895 | ||
896 | void | |
897 | lde_check_withdraw_wcard(struct map *map, struct lde_nbr *ln) | |
898 | { | |
899 | struct fec *f; | |
900 | struct fec_node *fn; | |
901 | struct fec_nh *fnh; | |
902 | struct lde_map *me; | |
87b5f1b7 | 903 | struct l2vpn_pw *pw; |
aff1743c | 904 | struct lde_nbr *lnbr; |
8429abe0 RW |
905 | |
906 | /* LWd.2: send label release */ | |
0bcc2916 | 907 | lde_send_labelrelease(ln, NULL, map, map->label); |
8429abe0 RW |
908 | |
909 | RB_FOREACH(f, fec_tree, &ft) { | |
910 | fn = (struct fec_node *)f; | |
0bcc2916 RW |
911 | me = (struct lde_map *)fec_find(&ln->recv_map, &fn->fec); |
912 | ||
913 | if (lde_wildcard_apply(map, &fn->fec, me) == 0) | |
914 | continue; | |
8429abe0 RW |
915 | |
916 | /* LWd.1: remove label from forwarding/switching use */ | |
917 | LIST_FOREACH(fnh, &fn->nexthops, entry) { | |
918 | switch (f->type) { | |
919 | case FEC_TYPE_IPV4: | |
920 | case FEC_TYPE_IPV6: | |
921 | if (!lde_address_find(ln, fnh->af, | |
922 | &fnh->nexthop)) | |
923 | continue; | |
924 | break; | |
925 | case FEC_TYPE_PWID: | |
926 | if (f->u.pwid.lsr_id.s_addr != ln->id.s_addr) | |
927 | continue; | |
87b5f1b7 RW |
928 | pw = (struct l2vpn_pw *) fn->data; |
929 | if (pw) | |
930 | pw->remote_status = PW_NOT_FORWARDING; | |
8429abe0 RW |
931 | break; |
932 | default: | |
933 | break; | |
934 | } | |
be8e0d31 RW |
935 | if (map->label != NO_LABEL && map->label != |
936 | fnh->remote_label) | |
937 | continue; | |
938 | ||
8429abe0 RW |
939 | lde_send_delete_klabel(fn, fnh); |
940 | fnh->remote_label = NO_LABEL; | |
941 | } | |
942 | ||
943 | /* LWd.3: check previously received label mapping */ | |
8429abe0 RW |
944 | if (me && (map->label == NO_LABEL || |
945 | map->label == me->map.label)) | |
946 | /* | |
947 | * LWd.4: remove record of previously received | |
948 | * label mapping | |
949 | */ | |
950 | lde_map_del(ln, me, 0); | |
8dfdf235 | 951 | else |
952 | /* LWd.13 done */ | |
953 | continue; | |
aff1743c KS |
954 | |
955 | /* Ordered Control: additional withdraw steps */ | |
956 | if (ldeconf->flags & F_LDPD_ORDERED_CONTROL) { | |
8dfdf235 | 957 | /* |
958 | * LWd.8: for each neighbor other that src of | |
959 | * withdraw msg | |
960 | */ | |
aff1743c KS |
961 | RB_FOREACH(lnbr, nbr_tree, &lde_nbrs) { |
962 | if (ln->peerid == lnbr->peerid) | |
963 | continue; | |
964 | ||
8dfdf235 | 965 | /* LWd.9: check if previously sent a label |
966 | * mapping | |
967 | */ | |
968 | me = (struct lde_map *)fec_find( | |
969 | &lnbr->sent_map, &fn->fec); | |
aff1743c | 970 | /* |
8dfdf235 | 971 | * LWd.10: does label sent to peer "map" to |
972 | * withdraw label | |
aff1743c | 973 | */ |
8dfdf235 | 974 | if (me && lde_nbr_is_nexthop(fn, lnbr)) |
aff1743c | 975 | /* LWd.11: send label withdraw */ |
8dfdf235 | 976 | lde_send_labelwithdraw(lnbr, fn, NULL, |
977 | NULL); | |
aff1743c KS |
978 | } |
979 | } | |
8429abe0 RW |
980 | } |
981 | } | |
982 | ||
0bcc2916 RW |
983 | int |
984 | lde_wildcard_apply(struct map *wcard, struct fec *fec, struct lde_map *me) | |
985 | { | |
986 | switch (wcard->type) { | |
987 | case MAP_TYPE_WILDCARD: | |
988 | /* full wildcard */ | |
989 | return (1); | |
d4afb819 RW |
990 | case MAP_TYPE_TYPED_WCARD: |
991 | switch (wcard->fec.twcard.type) { | |
992 | case MAP_TYPE_PREFIX: | |
993 | if (wcard->fec.twcard.u.prefix_af == AF_INET && | |
994 | fec->type != FEC_TYPE_IPV4) | |
995 | return (0); | |
996 | if (wcard->fec.twcard.u.prefix_af == AF_INET6 && | |
997 | fec->type != FEC_TYPE_IPV6) | |
998 | return (0); | |
999 | return (1); | |
aba50a83 RW |
1000 | case MAP_TYPE_PWID: |
1001 | if (fec->type != FEC_TYPE_PWID) | |
1002 | return (0); | |
1003 | if (wcard->fec.twcard.u.pw_type != PW_TYPE_WILDCARD && | |
1004 | wcard->fec.twcard.u.pw_type != fec->u.pwid.type) | |
1005 | return (0); | |
1006 | return (1); | |
d4afb819 RW |
1007 | default: |
1008 | fatalx("lde_wildcard_apply: unexpected fec type"); | |
1009 | } | |
1010 | break; | |
0bcc2916 RW |
1011 | case MAP_TYPE_PWID: |
1012 | /* RFC4447 pw-id group wildcard */ | |
1013 | if (fec->type != FEC_TYPE_PWID) | |
1014 | return (0); | |
1015 | if (fec->u.pwid.type != wcard->fec.pwid.type) | |
1016 | return (0); | |
1017 | if (me == NULL || (me->map.fec.pwid.group_id != | |
1018 | wcard->fec.pwid.group_id)) | |
1019 | return (0); | |
1020 | return (1); | |
1021 | default: | |
1022 | fatalx("lde_wildcard_apply: unexpected fec type"); | |
1023 | } | |
1024 | } | |
1025 | ||
8429abe0 RW |
1026 | /* gabage collector timer: timer to remove dead entries from the LIB */ |
1027 | ||
1028 | /* ARGSUSED */ | |
eac6e3f0 RW |
1029 | int |
1030 | lde_gc_timer(struct thread *thread) | |
8429abe0 RW |
1031 | { |
1032 | struct fec *fec, *safe; | |
1033 | struct fec_node *fn; | |
1034 | int count = 0; | |
1035 | ||
1036 | RB_FOREACH_SAFE(fec, fec_tree, &ft, safe) { | |
1037 | fn = (struct fec_node *) fec; | |
1038 | ||
1039 | if (!LIST_EMPTY(&fn->nexthops) || | |
45926e58 RZ |
1040 | !RB_EMPTY(lde_map_head, &fn->downstream) || |
1041 | !RB_EMPTY(lde_map_head, &fn->upstream)) | |
8429abe0 RW |
1042 | continue; |
1043 | ||
f4ec681c BA |
1044 | if (fn->local_label != NO_LABEL) |
1045 | lde_free_label(fn->local_label); | |
1046 | ||
8429abe0 RW |
1047 | fec_remove(&ft, &fn->fec); |
1048 | free(fn); | |
1049 | count++; | |
1050 | } | |
1051 | ||
1052 | if (count > 0) | |
1053 | log_debug("%s: %u entries removed", __func__, count); | |
1054 | ||
1055 | lde_gc_start_timer(); | |
eac6e3f0 RW |
1056 | |
1057 | return (0); | |
8429abe0 RW |
1058 | } |
1059 | ||
1060 | void | |
1061 | lde_gc_start_timer(void) | |
1062 | { | |
eac6e3f0 | 1063 | THREAD_TIMER_OFF(gc_timer); |
66e78ae6 QY |
1064 | gc_timer = NULL; |
1065 | thread_add_timer(master, lde_gc_timer, NULL, LDE_GC_INTERVAL, | |
1066 | &gc_timer); | |
8429abe0 RW |
1067 | } |
1068 | ||
1069 | void | |
1070 | lde_gc_stop_timer(void) | |
1071 | { | |
eac6e3f0 | 1072 | THREAD_TIMER_OFF(gc_timer); |
8429abe0 | 1073 | } |