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Commit | Line | Data |
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8429abe0 RW |
1 | /* $OpenBSD$ */ |
2 | ||
3 | /* | |
4 | * Copyright (c) 2013, 2016 Renato Westphal <renato@openbsd.org> | |
5 | * Copyright (c) 2004, 2005 Claudio Jeker <claudio@openbsd.org> | |
6 | * Copyright (c) 2004 Esben Norby <norby@openbsd.org> | |
7 | * Copyright (c) 2003, 2004 Henning Brauer <henning@openbsd.org> | |
8 | * | |
9 | * Permission to use, copy, modify, and distribute this software for any | |
10 | * purpose with or without fee is hereby granted, provided that the above | |
11 | * copyright notice and this permission notice appear in all copies. | |
12 | * | |
13 | * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES | |
14 | * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF | |
15 | * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR | |
16 | * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES | |
17 | * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN | |
18 | * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF | |
19 | * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. | |
20 | */ | |
21 | ||
eac6e3f0 | 22 | #include <zebra.h> |
8429abe0 RW |
23 | |
24 | #include "ldp.h" | |
25 | #include "ldpd.h" | |
26 | #include "ldpe.h" | |
27 | #include "log.h" | |
28 | #include "lde.h" | |
eac6e3f0 | 29 | #include "ldp_debug.h" |
8429abe0 | 30 | |
eac6e3f0 RW |
31 | #include <lib/log.h> |
32 | #include "memory.h" | |
33 | #include "privs.h" | |
34 | #include "sigevent.h" | |
35 | #include "mpls.h" | |
fea12efb | 36 | #include <lib/linklist.h> |
37 | #include "zclient.h" | |
38 | #include "stream.h" | |
39 | #include "network.h" | |
689f5a8c | 40 | #include "libfrr.h" |
eac6e3f0 RW |
41 | |
42 | static void lde_shutdown(void); | |
43 | static int lde_dispatch_imsg(struct thread *); | |
44 | static int lde_dispatch_parent(struct thread *); | |
45926e58 RZ |
45 | static __inline int lde_nbr_compare(const struct lde_nbr *, |
46 | const struct lde_nbr *); | |
8429abe0 RW |
47 | static struct lde_nbr *lde_nbr_new(uint32_t, struct lde_nbr *); |
48 | static void lde_nbr_del(struct lde_nbr *); | |
49 | static struct lde_nbr *lde_nbr_find(uint32_t); | |
50 | static void lde_nbr_clear(void); | |
51 | static void lde_nbr_addr_update(struct lde_nbr *, | |
52 | struct lde_addr *, int); | |
45926e58 RZ |
53 | static __inline int lde_map_compare(const struct lde_map *, |
54 | const struct lde_map *); | |
8429abe0 RW |
55 | static void lde_map_free(void *); |
56 | static int lde_address_add(struct lde_nbr *, struct lde_addr *); | |
57 | static int lde_address_del(struct lde_nbr *, struct lde_addr *); | |
58 | static void lde_address_list_free(struct lde_nbr *); | |
5afba51d | 59 | static void zclient_sync_init(u_short instance); |
fea12efb | 60 | static void lde_label_list_init(void); |
5afba51d | 61 | static int lde_get_label_chunk(void); |
fea12efb | 62 | static void on_get_label_chunk_response(uint32_t start, uint32_t end); |
63 | static uint32_t lde_get_next_label(void); | |
8429abe0 RW |
64 | |
65 | RB_GENERATE(nbr_tree, lde_nbr, entry, lde_nbr_compare) | |
d3e1887a | 66 | RB_GENERATE(lde_map_head, lde_map, entry, lde_map_compare) |
8429abe0 RW |
67 | |
68 | struct ldpd_conf *ldeconf; | |
69 | struct nbr_tree lde_nbrs = RB_INITIALIZER(&lde_nbrs); | |
70 | ||
71 | static struct imsgev *iev_ldpe; | |
28e8294c | 72 | static struct imsgev *iev_main, *iev_main_sync; |
8429abe0 | 73 | |
eac6e3f0 RW |
74 | /* Master of threads. */ |
75 | struct thread_master *master; | |
76 | ||
77 | /* lde privileges */ | |
78 | static zebra_capabilities_t _caps_p [] = | |
8429abe0 | 79 | { |
eac6e3f0 RW |
80 | /* none */ |
81 | }; | |
8429abe0 | 82 | |
eac6e3f0 RW |
83 | static struct zebra_privs_t lde_privs = |
84 | { | |
eac6e3f0 RW |
85 | #if defined(VTY_GROUP) |
86 | .vty_group = VTY_GROUP, | |
87 | #endif | |
88 | .caps_p = _caps_p, | |
89 | .cap_num_p = array_size(_caps_p), | |
90 | .cap_num_i = 0 | |
91 | }; | |
92 | ||
fea12efb | 93 | /* List of chunks of labels externally assigned by Zebra */ |
5afba51d RW |
94 | static struct list *label_chunk_list; |
95 | static struct listnode *current_label_chunk; | |
96 | ||
97 | /* Synchronous zclient to request labels */ | |
98 | static struct zclient *zclient_sync; | |
fea12efb | 99 | |
eac6e3f0 RW |
100 | /* SIGINT / SIGTERM handler. */ |
101 | static void | |
102 | sigint(void) | |
103 | { | |
104 | lde_shutdown(); | |
8429abe0 RW |
105 | } |
106 | ||
eac6e3f0 RW |
107 | static struct quagga_signal_t lde_signals[] = |
108 | { | |
1e7e440f RW |
109 | { |
110 | .signal = SIGHUP, | |
111 | /* ignore */ | |
112 | }, | |
eac6e3f0 RW |
113 | { |
114 | .signal = SIGINT, | |
115 | .handler = &sigint, | |
116 | }, | |
117 | { | |
118 | .signal = SIGTERM, | |
119 | .handler = &sigint, | |
120 | }, | |
121 | }; | |
122 | ||
8429abe0 RW |
123 | /* label decision engine */ |
124 | void | |
274f5abf | 125 | lde(void) |
8429abe0 | 126 | { |
eac6e3f0 | 127 | struct thread thread; |
8429abe0 | 128 | |
eac6e3f0 | 129 | #ifdef HAVE_SETPROCTITLE |
8429abe0 | 130 | setproctitle("label decision engine"); |
eac6e3f0 | 131 | #endif |
8429abe0 | 132 | ldpd_process = PROC_LDE_ENGINE; |
fa68f9da | 133 | log_procname = log_procnames[PROC_LDE_ENGINE]; |
8429abe0 | 134 | |
972a411c | 135 | master = thread_master_create(NULL); |
8429abe0 RW |
136 | |
137 | /* setup signal handler */ | |
eac6e3f0 | 138 | signal_init(master, array_size(lde_signals), lde_signals); |
8429abe0 | 139 | |
28e8294c RW |
140 | /* setup pipes and event handlers to the parent process */ |
141 | if ((iev_main = calloc(1, sizeof(struct imsgev))) == NULL) | |
8429abe0 | 142 | fatal(NULL); |
28e8294c | 143 | imsg_init(&iev_main->ibuf, LDPD_FD_ASYNC); |
eac6e3f0 | 144 | iev_main->handler_read = lde_dispatch_parent; |
66e78ae6 QY |
145 | iev_main->ev_read = NULL; |
146 | thread_add_read(master, iev_main->handler_read, iev_main, iev_main->ibuf.fd, | |
147 | &iev_main->ev_read); | |
eac6e3f0 | 148 | iev_main->handler_write = ldp_write_handler; |
28e8294c RW |
149 | |
150 | if ((iev_main_sync = calloc(1, sizeof(struct imsgev))) == NULL) | |
151 | fatal(NULL); | |
152 | imsg_init(&iev_main_sync->ibuf, LDPD_FD_SYNC); | |
eac6e3f0 | 153 | |
274f5abf RW |
154 | /* create base configuration */ |
155 | ldeconf = config_new_empty(); | |
156 | ||
157 | /* Fetch next active thread. */ | |
158 | while (thread_fetch(master, &thread)) | |
159 | thread_call(&thread); | |
160 | } | |
161 | ||
162 | void | |
163 | lde_init(struct ldpd_init *init) | |
164 | { | |
165 | /* drop privileges */ | |
af7e63a3 RW |
166 | lde_privs.user = init->user; |
167 | lde_privs.group = init->group; | |
274f5abf RW |
168 | zprivs_init(&lde_privs); |
169 | ||
eac6e3f0 | 170 | /* start the LIB garbage collector */ |
8429abe0 RW |
171 | lde_gc_start_timer(); |
172 | ||
fea12efb | 173 | /* Init synchronous zclient and label list */ |
689f5a8c DL |
174 | frr_zclient_addr(&zclient_addr, &zclient_addr_len, |
175 | init->zclient_serv_path); | |
274f5abf | 176 | zclient_sync_init(init->instance); |
fea12efb | 177 | lde_label_list_init(); |
8429abe0 RW |
178 | } |
179 | ||
eac6e3f0 | 180 | static void |
8429abe0 RW |
181 | lde_shutdown(void) |
182 | { | |
183 | /* close pipes */ | |
835a7376 RW |
184 | if (iev_ldpe) { |
185 | msgbuf_clear(&iev_ldpe->ibuf.w); | |
186 | close(iev_ldpe->ibuf.fd); | |
187 | } | |
8429abe0 RW |
188 | msgbuf_clear(&iev_main->ibuf.w); |
189 | close(iev_main->ibuf.fd); | |
28e8294c RW |
190 | msgbuf_clear(&iev_main_sync->ibuf.w); |
191 | close(iev_main_sync->ibuf.fd); | |
8429abe0 RW |
192 | |
193 | lde_gc_stop_timer(); | |
194 | lde_nbr_clear(); | |
195 | fec_tree_clear(); | |
196 | ||
197 | config_clear(ldeconf); | |
198 | ||
835a7376 RW |
199 | if (iev_ldpe) |
200 | free(iev_ldpe); | |
8429abe0 | 201 | free(iev_main); |
28e8294c | 202 | free(iev_main_sync); |
8429abe0 RW |
203 | |
204 | log_info("label decision engine exiting"); | |
205 | exit(0); | |
206 | } | |
207 | ||
208 | /* imesg */ | |
eac6e3f0 | 209 | int |
8429abe0 RW |
210 | lde_imsg_compose_parent(int type, pid_t pid, void *data, uint16_t datalen) |
211 | { | |
212 | return (imsg_compose_event(iev_main, type, 0, pid, -1, data, datalen)); | |
213 | } | |
214 | ||
f2232fdf RW |
215 | void |
216 | lde_imsg_compose_parent_sync(int type, pid_t pid, void *data, uint16_t datalen) | |
217 | { | |
218 | imsg_compose_event(iev_main_sync, type, 0, pid, -1, data, datalen); | |
219 | imsg_flush(&iev_main_sync->ibuf); | |
220 | } | |
221 | ||
8429abe0 RW |
222 | int |
223 | lde_imsg_compose_ldpe(int type, uint32_t peerid, pid_t pid, void *data, | |
224 | uint16_t datalen) | |
225 | { | |
226 | return (imsg_compose_event(iev_ldpe, type, peerid, pid, | |
227 | -1, data, datalen)); | |
228 | } | |
229 | ||
230 | /* ARGSUSED */ | |
eac6e3f0 RW |
231 | static int |
232 | lde_dispatch_imsg(struct thread *thread) | |
8429abe0 | 233 | { |
eac6e3f0 | 234 | struct imsgev *iev = THREAD_ARG(thread); |
8429abe0 RW |
235 | struct imsgbuf *ibuf = &iev->ibuf; |
236 | struct imsg imsg; | |
237 | struct lde_nbr *ln; | |
236c6935 RW |
238 | struct map *map; |
239 | struct lde_addr *lde_addr; | |
240 | struct notify_msg *nm; | |
8429abe0 | 241 | ssize_t n; |
eac6e3f0 | 242 | int shut = 0; |
8429abe0 | 243 | |
eac6e3f0 RW |
244 | iev->ev_read = NULL; |
245 | ||
246 | if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN) | |
247 | fatal("imsg_read error"); | |
248 | if (n == 0) /* connection closed */ | |
249 | shut = 1; | |
8429abe0 RW |
250 | |
251 | for (;;) { | |
252 | if ((n = imsg_get(ibuf, &imsg)) == -1) | |
253 | fatal("lde_dispatch_imsg: imsg_get error"); | |
254 | if (n == 0) | |
255 | break; | |
256 | ||
257 | switch (imsg.hdr.type) { | |
258 | case IMSG_LABEL_MAPPING_FULL: | |
259 | ln = lde_nbr_find(imsg.hdr.peerid); | |
260 | if (ln == NULL) { | |
261 | log_debug("%s: cannot find lde neighbor", | |
262 | __func__); | |
263 | break; | |
264 | } | |
265 | ||
266 | fec_snap(ln); | |
267 | break; | |
268 | case IMSG_LABEL_MAPPING: | |
269 | case IMSG_LABEL_REQUEST: | |
270 | case IMSG_LABEL_RELEASE: | |
271 | case IMSG_LABEL_WITHDRAW: | |
272 | case IMSG_LABEL_ABORT: | |
236c6935 RW |
273 | if (imsg.hdr.len - IMSG_HEADER_SIZE != |
274 | sizeof(struct map)) | |
8429abe0 | 275 | fatalx("lde_dispatch_imsg: wrong imsg len"); |
236c6935 | 276 | map = imsg.data; |
8429abe0 RW |
277 | |
278 | ln = lde_nbr_find(imsg.hdr.peerid); | |
279 | if (ln == NULL) { | |
280 | log_debug("%s: cannot find lde neighbor", | |
281 | __func__); | |
282 | break; | |
283 | } | |
284 | ||
285 | switch (imsg.hdr.type) { | |
286 | case IMSG_LABEL_MAPPING: | |
236c6935 | 287 | lde_check_mapping(map, ln); |
8429abe0 RW |
288 | break; |
289 | case IMSG_LABEL_REQUEST: | |
236c6935 | 290 | lde_check_request(map, ln); |
8429abe0 RW |
291 | break; |
292 | case IMSG_LABEL_RELEASE: | |
236c6935 | 293 | lde_check_release(map, ln); |
8429abe0 RW |
294 | break; |
295 | case IMSG_LABEL_WITHDRAW: | |
236c6935 | 296 | lde_check_withdraw(map, ln); |
8429abe0 RW |
297 | break; |
298 | case IMSG_LABEL_ABORT: | |
299 | /* not necessary */ | |
300 | break; | |
301 | } | |
302 | break; | |
303 | case IMSG_ADDRESS_ADD: | |
236c6935 RW |
304 | if (imsg.hdr.len - IMSG_HEADER_SIZE != |
305 | sizeof(struct lde_addr)) | |
8429abe0 | 306 | fatalx("lde_dispatch_imsg: wrong imsg len"); |
236c6935 | 307 | lde_addr = imsg.data; |
8429abe0 RW |
308 | |
309 | ln = lde_nbr_find(imsg.hdr.peerid); | |
310 | if (ln == NULL) { | |
311 | log_debug("%s: cannot find lde neighbor", | |
312 | __func__); | |
313 | break; | |
314 | } | |
236c6935 | 315 | if (lde_address_add(ln, lde_addr) < 0) { |
8429abe0 RW |
316 | log_debug("%s: cannot add address %s, it " |
317 | "already exists", __func__, | |
236c6935 | 318 | log_addr(lde_addr->af, &lde_addr->addr)); |
8429abe0 RW |
319 | } |
320 | break; | |
321 | case IMSG_ADDRESS_DEL: | |
236c6935 RW |
322 | if (imsg.hdr.len - IMSG_HEADER_SIZE != |
323 | sizeof(struct lde_addr)) | |
8429abe0 | 324 | fatalx("lde_dispatch_imsg: wrong imsg len"); |
236c6935 | 325 | lde_addr = imsg.data; |
8429abe0 RW |
326 | |
327 | ln = lde_nbr_find(imsg.hdr.peerid); | |
328 | if (ln == NULL) { | |
329 | log_debug("%s: cannot find lde neighbor", | |
330 | __func__); | |
331 | break; | |
332 | } | |
236c6935 | 333 | if (lde_address_del(ln, lde_addr) < 0) { |
8429abe0 RW |
334 | log_debug("%s: cannot delete address %s, it " |
335 | "does not exist", __func__, | |
236c6935 | 336 | log_addr(lde_addr->af, &lde_addr->addr)); |
8429abe0 RW |
337 | } |
338 | break; | |
339 | case IMSG_NOTIFICATION: | |
236c6935 RW |
340 | if (imsg.hdr.len - IMSG_HEADER_SIZE != |
341 | sizeof(struct notify_msg)) | |
8429abe0 | 342 | fatalx("lde_dispatch_imsg: wrong imsg len"); |
236c6935 | 343 | nm = imsg.data; |
8429abe0 RW |
344 | |
345 | ln = lde_nbr_find(imsg.hdr.peerid); | |
346 | if (ln == NULL) { | |
347 | log_debug("%s: cannot find lde neighbor", | |
348 | __func__); | |
349 | break; | |
350 | } | |
351 | ||
236c6935 | 352 | switch (nm->status_code) { |
8429abe0 | 353 | case S_PW_STATUS: |
236c6935 | 354 | l2vpn_recv_pw_status(ln, nm); |
8429abe0 | 355 | break; |
257799cd RW |
356 | case S_ENDOFLIB: |
357 | /* | |
358 | * Do nothing for now. Should be useful in | |
359 | * the future when we implement LDP-IGP | |
360 | * Synchronization (RFC 5443) and Graceful | |
361 | * Restart (RFC 3478). | |
362 | */ | |
8429abe0 RW |
363 | default: |
364 | break; | |
365 | } | |
366 | break; | |
367 | case IMSG_NEIGHBOR_UP: | |
368 | if (imsg.hdr.len - IMSG_HEADER_SIZE != | |
369 | sizeof(struct lde_nbr)) | |
370 | fatalx("lde_dispatch_imsg: wrong imsg len"); | |
371 | ||
372 | if (lde_nbr_find(imsg.hdr.peerid)) | |
373 | fatalx("lde_dispatch_imsg: " | |
374 | "neighbor already exists"); | |
375 | lde_nbr_new(imsg.hdr.peerid, imsg.data); | |
376 | break; | |
377 | case IMSG_NEIGHBOR_DOWN: | |
378 | lde_nbr_del(lde_nbr_find(imsg.hdr.peerid)); | |
379 | break; | |
380 | case IMSG_CTL_SHOW_LIB: | |
381 | rt_dump(imsg.hdr.pid); | |
382 | ||
383 | lde_imsg_compose_ldpe(IMSG_CTL_END, 0, | |
384 | imsg.hdr.pid, NULL, 0); | |
385 | break; | |
386 | case IMSG_CTL_SHOW_L2VPN_PW: | |
387 | l2vpn_pw_ctl(imsg.hdr.pid); | |
388 | ||
389 | lde_imsg_compose_ldpe(IMSG_CTL_END, 0, | |
390 | imsg.hdr.pid, NULL, 0); | |
391 | break; | |
392 | case IMSG_CTL_SHOW_L2VPN_BINDING: | |
393 | l2vpn_binding_ctl(imsg.hdr.pid); | |
394 | ||
395 | lde_imsg_compose_ldpe(IMSG_CTL_END, 0, | |
396 | imsg.hdr.pid, NULL, 0); | |
397 | break; | |
8429abe0 RW |
398 | default: |
399 | log_debug("%s: unexpected imsg %d", __func__, | |
400 | imsg.hdr.type); | |
401 | break; | |
402 | } | |
403 | imsg_free(&imsg); | |
404 | } | |
405 | if (!shut) | |
406 | imsg_event_add(iev); | |
407 | else { | |
eac6e3f0 RW |
408 | /* this pipe is dead, so remove the event handlers and exit */ |
409 | THREAD_READ_OFF(iev->ev_read); | |
410 | THREAD_WRITE_OFF(iev->ev_write); | |
411 | lde_shutdown(); | |
8429abe0 | 412 | } |
eac6e3f0 RW |
413 | |
414 | return (0); | |
8429abe0 RW |
415 | } |
416 | ||
417 | /* ARGSUSED */ | |
eac6e3f0 RW |
418 | static int |
419 | lde_dispatch_parent(struct thread *thread) | |
8429abe0 RW |
420 | { |
421 | static struct ldpd_conf *nconf; | |
52b530fc | 422 | struct iface *iface, *niface; |
8429abe0 RW |
423 | struct tnbr *ntnbr; |
424 | struct nbr_params *nnbrp; | |
52b530fc RW |
425 | static struct l2vpn *l2vpn, *nl2vpn; |
426 | struct l2vpn_if *lif, *nlif; | |
427 | struct l2vpn_pw *pw, *npw; | |
8429abe0 | 428 | struct imsg imsg; |
52b530fc | 429 | struct kif *kif; |
236c6935 | 430 | struct kroute *kr; |
eac6e3f0 RW |
431 | int fd = THREAD_FD(thread); |
432 | struct imsgev *iev = THREAD_ARG(thread); | |
8429abe0 RW |
433 | struct imsgbuf *ibuf = &iev->ibuf; |
434 | ssize_t n; | |
435 | int shut = 0; | |
436 | struct fec fec; | |
437 | ||
eac6e3f0 RW |
438 | iev->ev_read = NULL; |
439 | ||
440 | if ((n = imsg_read(ibuf)) == -1 && errno != EAGAIN) | |
441 | fatal("imsg_read error"); | |
442 | if (n == 0) /* connection closed */ | |
443 | shut = 1; | |
8429abe0 RW |
444 | |
445 | for (;;) { | |
446 | if ((n = imsg_get(ibuf, &imsg)) == -1) | |
447 | fatal("lde_dispatch_parent: imsg_get error"); | |
448 | if (n == 0) | |
449 | break; | |
450 | ||
451 | switch (imsg.hdr.type) { | |
52b530fc RW |
452 | case IMSG_IFSTATUS: |
453 | if (imsg.hdr.len != IMSG_HEADER_SIZE + | |
454 | sizeof(struct kif)) | |
455 | fatalx("IFSTATUS imsg with wrong len"); | |
456 | kif = imsg.data; | |
457 | ||
458 | iface = if_lookup_name(ldeconf, kif->ifname); | |
459 | if (iface) { | |
460 | if_update_info(iface, kif); | |
461 | break; | |
462 | } | |
463 | ||
464 | RB_FOREACH(l2vpn, l2vpn_head, &ldeconf->l2vpn_tree) { | |
465 | lif = l2vpn_if_find(l2vpn, kif->ifname); | |
466 | if (lif) { | |
467 | l2vpn_if_update_info(lif, kif); | |
468 | break; | |
469 | } | |
470 | pw = l2vpn_pw_find(l2vpn, kif->ifname); | |
471 | if (pw) { | |
472 | l2vpn_pw_update_info(pw, kif); | |
473 | break; | |
474 | } | |
475 | } | |
476 | break; | |
8429abe0 | 477 | case IMSG_NETWORK_ADD: |
8cb1fc45 | 478 | case IMSG_NETWORK_UPDATE: |
236c6935 RW |
479 | if (imsg.hdr.len != IMSG_HEADER_SIZE + |
480 | sizeof(struct kroute)) { | |
8429abe0 RW |
481 | log_warnx("%s: wrong imsg len", __func__); |
482 | break; | |
483 | } | |
236c6935 | 484 | kr = imsg.data; |
8429abe0 | 485 | |
236c6935 | 486 | switch (kr->af) { |
8429abe0 RW |
487 | case AF_INET: |
488 | fec.type = FEC_TYPE_IPV4; | |
236c6935 RW |
489 | fec.u.ipv4.prefix = kr->prefix.v4; |
490 | fec.u.ipv4.prefixlen = kr->prefixlen; | |
8429abe0 RW |
491 | break; |
492 | case AF_INET6: | |
493 | fec.type = FEC_TYPE_IPV6; | |
236c6935 RW |
494 | fec.u.ipv6.prefix = kr->prefix.v6; |
495 | fec.u.ipv6.prefixlen = kr->prefixlen; | |
8429abe0 RW |
496 | break; |
497 | default: | |
498 | fatalx("lde_dispatch_parent: unknown af"); | |
499 | } | |
500 | ||
501 | switch (imsg.hdr.type) { | |
502 | case IMSG_NETWORK_ADD: | |
236c6935 RW |
503 | lde_kernel_insert(&fec, kr->af, &kr->nexthop, |
504 | kr->ifindex, kr->priority, | |
505 | kr->flags & F_CONNECTED, NULL); | |
8429abe0 | 506 | break; |
8cb1fc45 RW |
507 | case IMSG_NETWORK_UPDATE: |
508 | lde_kernel_update(&fec); | |
8429abe0 RW |
509 | break; |
510 | } | |
511 | break; | |
512 | case IMSG_SOCKET_IPC: | |
513 | if (iev_ldpe) { | |
514 | log_warnx("%s: received unexpected imsg fd " | |
515 | "to ldpe", __func__); | |
516 | break; | |
517 | } | |
518 | if ((fd = imsg.fd) == -1) { | |
519 | log_warnx("%s: expected to receive imsg fd to " | |
520 | "ldpe but didn't receive any", __func__); | |
521 | break; | |
522 | } | |
523 | ||
524 | if ((iev_ldpe = malloc(sizeof(struct imsgev))) == NULL) | |
525 | fatal(NULL); | |
526 | imsg_init(&iev_ldpe->ibuf, fd); | |
eac6e3f0 | 527 | iev_ldpe->handler_read = lde_dispatch_imsg; |
66e78ae6 QY |
528 | iev_ldpe->ev_read = NULL; |
529 | thread_add_read(master, iev_ldpe->handler_read, iev_ldpe, iev_ldpe->ibuf.fd, | |
530 | &iev_ldpe->ev_read); | |
eac6e3f0 RW |
531 | iev_ldpe->handler_write = ldp_write_handler; |
532 | iev_ldpe->ev_write = NULL; | |
8429abe0 | 533 | break; |
274f5abf RW |
534 | case IMSG_INIT: |
535 | if (imsg.hdr.len != IMSG_HEADER_SIZE + | |
536 | sizeof(struct ldpd_init)) | |
537 | fatalx("INIT imsg with wrong len"); | |
538 | ||
539 | memcpy(&init, imsg.data, sizeof(init)); | |
540 | lde_init(&init); | |
541 | break; | |
8429abe0 RW |
542 | case IMSG_RECONF_CONF: |
543 | if ((nconf = malloc(sizeof(struct ldpd_conf))) == | |
544 | NULL) | |
545 | fatal(NULL); | |
546 | memcpy(nconf, imsg.data, sizeof(struct ldpd_conf)); | |
547 | ||
45926e58 RZ |
548 | RB_INIT(iface_head, &nconf->iface_tree); |
549 | RB_INIT(tnbr_head, &nconf->tnbr_tree); | |
550 | RB_INIT(nbrp_head, &nconf->nbrp_tree); | |
551 | RB_INIT(l2vpn_head, &nconf->l2vpn_tree); | |
8429abe0 RW |
552 | break; |
553 | case IMSG_RECONF_IFACE: | |
554 | if ((niface = malloc(sizeof(struct iface))) == NULL) | |
555 | fatal(NULL); | |
556 | memcpy(niface, imsg.data, sizeof(struct iface)); | |
557 | ||
7d3d7491 | 558 | RB_INSERT(iface_head, &nconf->iface_tree, niface); |
8429abe0 RW |
559 | break; |
560 | case IMSG_RECONF_TNBR: | |
561 | if ((ntnbr = malloc(sizeof(struct tnbr))) == NULL) | |
562 | fatal(NULL); | |
563 | memcpy(ntnbr, imsg.data, sizeof(struct tnbr)); | |
564 | ||
7989cdba | 565 | RB_INSERT(tnbr_head, &nconf->tnbr_tree, ntnbr); |
8429abe0 RW |
566 | break; |
567 | case IMSG_RECONF_NBRP: | |
568 | if ((nnbrp = malloc(sizeof(struct nbr_params))) == NULL) | |
569 | fatal(NULL); | |
570 | memcpy(nnbrp, imsg.data, sizeof(struct nbr_params)); | |
571 | ||
76c4abd1 | 572 | RB_INSERT(nbrp_head, &nconf->nbrp_tree, nnbrp); |
8429abe0 RW |
573 | break; |
574 | case IMSG_RECONF_L2VPN: | |
575 | if ((nl2vpn = malloc(sizeof(struct l2vpn))) == NULL) | |
576 | fatal(NULL); | |
577 | memcpy(nl2vpn, imsg.data, sizeof(struct l2vpn)); | |
578 | ||
45926e58 RZ |
579 | RB_INIT(l2vpn_if_head, &nl2vpn->if_tree); |
580 | RB_INIT(l2vpn_pw_head, &nl2vpn->pw_tree); | |
581 | RB_INIT(l2vpn_pw_head, &nl2vpn->pw_inactive_tree); | |
8429abe0 | 582 | |
90d7e7bd | 583 | RB_INSERT(l2vpn_head, &nconf->l2vpn_tree, nl2vpn); |
8429abe0 RW |
584 | break; |
585 | case IMSG_RECONF_L2VPN_IF: | |
586 | if ((nlif = malloc(sizeof(struct l2vpn_if))) == NULL) | |
587 | fatal(NULL); | |
588 | memcpy(nlif, imsg.data, sizeof(struct l2vpn_if)); | |
589 | ||
029c1958 | 590 | RB_INSERT(l2vpn_if_head, &nl2vpn->if_tree, nlif); |
8429abe0 RW |
591 | break; |
592 | case IMSG_RECONF_L2VPN_PW: | |
593 | if ((npw = malloc(sizeof(struct l2vpn_pw))) == NULL) | |
594 | fatal(NULL); | |
595 | memcpy(npw, imsg.data, sizeof(struct l2vpn_pw)); | |
596 | ||
20bacaeb | 597 | RB_INSERT(l2vpn_pw_head, &nl2vpn->pw_tree, npw); |
8429abe0 | 598 | break; |
eac6e3f0 RW |
599 | case IMSG_RECONF_L2VPN_IPW: |
600 | if ((npw = malloc(sizeof(struct l2vpn_pw))) == NULL) | |
601 | fatal(NULL); | |
602 | memcpy(npw, imsg.data, sizeof(struct l2vpn_pw)); | |
603 | ||
20bacaeb | 604 | RB_INSERT(l2vpn_pw_head, &nl2vpn->pw_inactive_tree, npw); |
eac6e3f0 | 605 | break; |
8429abe0 RW |
606 | case IMSG_RECONF_END: |
607 | merge_config(ldeconf, nconf); | |
1d75a89d | 608 | ldp_clear_config(nconf); |
8429abe0 RW |
609 | nconf = NULL; |
610 | break; | |
eac6e3f0 RW |
611 | case IMSG_DEBUG_UPDATE: |
612 | if (imsg.hdr.len != IMSG_HEADER_SIZE + | |
613 | sizeof(ldp_debug)) { | |
614 | log_warnx("%s: wrong imsg len", __func__); | |
615 | break; | |
616 | } | |
617 | memcpy(&ldp_debug, imsg.data, sizeof(ldp_debug)); | |
618 | break; | |
8429abe0 RW |
619 | default: |
620 | log_debug("%s: unexpected imsg %d", __func__, | |
621 | imsg.hdr.type); | |
622 | break; | |
623 | } | |
624 | imsg_free(&imsg); | |
625 | } | |
626 | if (!shut) | |
627 | imsg_event_add(iev); | |
628 | else { | |
eac6e3f0 RW |
629 | /* this pipe is dead, so remove the event handlers and exit */ |
630 | THREAD_READ_OFF(iev->ev_read); | |
631 | THREAD_WRITE_OFF(iev->ev_write); | |
632 | lde_shutdown(); | |
8429abe0 | 633 | } |
eac6e3f0 RW |
634 | |
635 | return (0); | |
8429abe0 RW |
636 | } |
637 | ||
45a8eba9 RW |
638 | int |
639 | lde_acl_check(char *acl_name, int af, union ldpd_addr *addr, uint8_t prefixlen) | |
640 | { | |
641 | return ldp_acl_request(iev_main_sync, acl_name, af, addr, prefixlen); | |
642 | } | |
643 | ||
8429abe0 | 644 | uint32_t |
8cb1fc45 | 645 | lde_update_label(struct fec_node *fn) |
8429abe0 | 646 | { |
8cb1fc45 RW |
647 | struct fec_nh *fnh; |
648 | int connected = 0; | |
649 | ||
650 | LIST_FOREACH(fnh, &fn->nexthops, entry) { | |
651 | if (fnh->flags & F_FEC_NH_CONNECTED) { | |
652 | connected = 1; | |
653 | break; | |
654 | } | |
655 | } | |
8429abe0 | 656 | |
45a8eba9 | 657 | /* should we allocate a label for this fec? */ |
8cb1fc45 | 658 | switch (fn->fec.type) { |
45a8eba9 RW |
659 | case FEC_TYPE_IPV4: |
660 | if ((ldeconf->ipv4.flags & F_LDPD_AF_ALLOCHOSTONLY) && | |
8cb1fc45 | 661 | fn->fec.u.ipv4.prefixlen != 32) |
45a8eba9 RW |
662 | return (NO_LABEL); |
663 | if (lde_acl_check(ldeconf->ipv4.acl_label_allocate_for, | |
8cb1fc45 RW |
664 | AF_INET, (union ldpd_addr *)&fn->fec.u.ipv4.prefix, |
665 | fn->fec.u.ipv4.prefixlen) != FILTER_PERMIT) | |
45a8eba9 RW |
666 | return (NO_LABEL); |
667 | break; | |
668 | case FEC_TYPE_IPV6: | |
669 | if ((ldeconf->ipv6.flags & F_LDPD_AF_ALLOCHOSTONLY) && | |
8cb1fc45 | 670 | fn->fec.u.ipv6.prefixlen != 128) |
45a8eba9 RW |
671 | return (NO_LABEL); |
672 | if (lde_acl_check(ldeconf->ipv6.acl_label_allocate_for, | |
8cb1fc45 RW |
673 | AF_INET6, (union ldpd_addr *)&fn->fec.u.ipv6.prefix, |
674 | fn->fec.u.ipv6.prefixlen) != FILTER_PERMIT) | |
45a8eba9 RW |
675 | return (NO_LABEL); |
676 | break; | |
677 | default: | |
45a8eba9 RW |
678 | break; |
679 | } | |
680 | ||
681 | if (connected) { | |
682 | /* choose implicit or explicit-null depending on configuration */ | |
8cb1fc45 | 683 | switch (fn->fec.type) { |
45a8eba9 RW |
684 | case FEC_TYPE_IPV4: |
685 | if (!(ldeconf->ipv4.flags & F_LDPD_AF_EXPNULL)) | |
686 | return (MPLS_LABEL_IMPLNULL); | |
687 | if (lde_acl_check(ldeconf->ipv4.acl_label_expnull_for, | |
8cb1fc45 RW |
688 | AF_INET, (union ldpd_addr *)&fn->fec.u.ipv4.prefix, |
689 | fn->fec.u.ipv4.prefixlen) != FILTER_PERMIT) | |
45a8eba9 RW |
690 | return (MPLS_LABEL_IMPLNULL); |
691 | return (MPLS_LABEL_IPV4NULL); | |
692 | case FEC_TYPE_IPV6: | |
693 | if (!(ldeconf->ipv6.flags & F_LDPD_AF_EXPNULL)) | |
694 | return (MPLS_LABEL_IMPLNULL); | |
695 | if (lde_acl_check(ldeconf->ipv6.acl_label_expnull_for, | |
8cb1fc45 RW |
696 | AF_INET6, (union ldpd_addr *)&fn->fec.u.ipv6.prefix, |
697 | fn->fec.u.ipv6.prefixlen) != FILTER_PERMIT) | |
45a8eba9 RW |
698 | return (MPLS_LABEL_IMPLNULL); |
699 | return (MPLS_LABEL_IPV6NULL); | |
700 | default: | |
8cb1fc45 | 701 | fatalx("lde_update_label: unexpected fec type"); |
45a8eba9 RW |
702 | break; |
703 | } | |
704 | } | |
705 | ||
8cb1fc45 RW |
706 | /* preserve current label if there's no need to update it */ |
707 | if (fn->local_label != NO_LABEL && | |
708 | fn->local_label > MPLS_LABEL_RESERVED_MAX) | |
709 | return (fn->local_label); | |
710 | ||
5afba51d | 711 | return (lde_get_next_label()); |
8429abe0 RW |
712 | } |
713 | ||
714 | void | |
715 | lde_send_change_klabel(struct fec_node *fn, struct fec_nh *fnh) | |
716 | { | |
717 | struct kroute kr; | |
718 | struct kpw kpw; | |
719 | struct l2vpn_pw *pw; | |
720 | ||
721 | switch (fn->fec.type) { | |
722 | case FEC_TYPE_IPV4: | |
723 | memset(&kr, 0, sizeof(kr)); | |
724 | kr.af = AF_INET; | |
725 | kr.prefix.v4 = fn->fec.u.ipv4.prefix; | |
726 | kr.prefixlen = fn->fec.u.ipv4.prefixlen; | |
727 | kr.nexthop.v4 = fnh->nexthop.v4; | |
88d88a9c | 728 | kr.ifindex = fnh->ifindex; |
8429abe0 RW |
729 | kr.local_label = fn->local_label; |
730 | kr.remote_label = fnh->remote_label; | |
731 | kr.priority = fnh->priority; | |
732 | ||
733 | lde_imsg_compose_parent(IMSG_KLABEL_CHANGE, 0, &kr, | |
734 | sizeof(kr)); | |
8429abe0 RW |
735 | break; |
736 | case FEC_TYPE_IPV6: | |
737 | memset(&kr, 0, sizeof(kr)); | |
738 | kr.af = AF_INET6; | |
739 | kr.prefix.v6 = fn->fec.u.ipv6.prefix; | |
740 | kr.prefixlen = fn->fec.u.ipv6.prefixlen; | |
741 | kr.nexthop.v6 = fnh->nexthop.v6; | |
88d88a9c | 742 | kr.ifindex = fnh->ifindex; |
8429abe0 RW |
743 | kr.local_label = fn->local_label; |
744 | kr.remote_label = fnh->remote_label; | |
745 | kr.priority = fnh->priority; | |
746 | ||
747 | lde_imsg_compose_parent(IMSG_KLABEL_CHANGE, 0, &kr, | |
748 | sizeof(kr)); | |
8429abe0 RW |
749 | break; |
750 | case FEC_TYPE_PWID: | |
751 | if (fn->local_label == NO_LABEL || | |
752 | fnh->remote_label == NO_LABEL) | |
753 | return; | |
754 | ||
755 | pw = (struct l2vpn_pw *) fn->data; | |
756 | pw->flags |= F_PW_STATUS_UP; | |
757 | ||
758 | memset(&kpw, 0, sizeof(kpw)); | |
759 | kpw.ifindex = pw->ifindex; | |
760 | kpw.pw_type = fn->fec.u.pwid.type; | |
761 | kpw.af = pw->af; | |
762 | kpw.nexthop = pw->addr; | |
763 | kpw.local_label = fn->local_label; | |
764 | kpw.remote_label = fnh->remote_label; | |
765 | kpw.flags = pw->flags; | |
766 | ||
767 | lde_imsg_compose_parent(IMSG_KPWLABEL_CHANGE, 0, &kpw, | |
768 | sizeof(kpw)); | |
769 | break; | |
770 | } | |
771 | } | |
772 | ||
773 | void | |
774 | lde_send_delete_klabel(struct fec_node *fn, struct fec_nh *fnh) | |
775 | { | |
776 | struct kroute kr; | |
777 | struct kpw kpw; | |
778 | struct l2vpn_pw *pw; | |
779 | ||
780 | switch (fn->fec.type) { | |
781 | case FEC_TYPE_IPV4: | |
782 | memset(&kr, 0, sizeof(kr)); | |
783 | kr.af = AF_INET; | |
784 | kr.prefix.v4 = fn->fec.u.ipv4.prefix; | |
785 | kr.prefixlen = fn->fec.u.ipv4.prefixlen; | |
786 | kr.nexthop.v4 = fnh->nexthop.v4; | |
88d88a9c | 787 | kr.ifindex = fnh->ifindex; |
8429abe0 RW |
788 | kr.local_label = fn->local_label; |
789 | kr.remote_label = fnh->remote_label; | |
790 | kr.priority = fnh->priority; | |
791 | ||
792 | lde_imsg_compose_parent(IMSG_KLABEL_DELETE, 0, &kr, | |
793 | sizeof(kr)); | |
8429abe0 RW |
794 | break; |
795 | case FEC_TYPE_IPV6: | |
796 | memset(&kr, 0, sizeof(kr)); | |
797 | kr.af = AF_INET6; | |
798 | kr.prefix.v6 = fn->fec.u.ipv6.prefix; | |
799 | kr.prefixlen = fn->fec.u.ipv6.prefixlen; | |
800 | kr.nexthop.v6 = fnh->nexthop.v6; | |
88d88a9c | 801 | kr.ifindex = fnh->ifindex; |
8429abe0 RW |
802 | kr.local_label = fn->local_label; |
803 | kr.remote_label = fnh->remote_label; | |
804 | kr.priority = fnh->priority; | |
805 | ||
806 | lde_imsg_compose_parent(IMSG_KLABEL_DELETE, 0, &kr, | |
807 | sizeof(kr)); | |
8429abe0 RW |
808 | break; |
809 | case FEC_TYPE_PWID: | |
810 | pw = (struct l2vpn_pw *) fn->data; | |
811 | if (!(pw->flags & F_PW_STATUS_UP)) | |
812 | return; | |
813 | pw->flags &= ~F_PW_STATUS_UP; | |
814 | ||
815 | memset(&kpw, 0, sizeof(kpw)); | |
816 | kpw.ifindex = pw->ifindex; | |
817 | kpw.pw_type = fn->fec.u.pwid.type; | |
818 | kpw.af = pw->af; | |
819 | kpw.nexthop = pw->addr; | |
820 | kpw.local_label = fn->local_label; | |
821 | kpw.remote_label = fnh->remote_label; | |
822 | kpw.flags = pw->flags; | |
823 | ||
824 | lde_imsg_compose_parent(IMSG_KPWLABEL_DELETE, 0, &kpw, | |
825 | sizeof(kpw)); | |
826 | break; | |
827 | } | |
828 | } | |
829 | ||
830 | void | |
831 | lde_fec2map(struct fec *fec, struct map *map) | |
832 | { | |
833 | memset(map, 0, sizeof(*map)); | |
834 | ||
835 | switch (fec->type) { | |
836 | case FEC_TYPE_IPV4: | |
837 | map->type = MAP_TYPE_PREFIX; | |
838 | map->fec.prefix.af = AF_INET; | |
839 | map->fec.prefix.prefix.v4 = fec->u.ipv4.prefix; | |
840 | map->fec.prefix.prefixlen = fec->u.ipv4.prefixlen; | |
841 | break; | |
842 | case FEC_TYPE_IPV6: | |
843 | map->type = MAP_TYPE_PREFIX; | |
844 | map->fec.prefix.af = AF_INET6; | |
845 | map->fec.prefix.prefix.v6 = fec->u.ipv6.prefix; | |
846 | map->fec.prefix.prefixlen = fec->u.ipv6.prefixlen; | |
847 | break; | |
848 | case FEC_TYPE_PWID: | |
849 | map->type = MAP_TYPE_PWID; | |
850 | map->fec.pwid.type = fec->u.pwid.type; | |
851 | map->fec.pwid.group_id = 0; | |
852 | map->flags |= F_MAP_PW_ID; | |
853 | map->fec.pwid.pwid = fec->u.pwid.pwid; | |
854 | break; | |
855 | } | |
856 | } | |
857 | ||
858 | void | |
859 | lde_map2fec(struct map *map, struct in_addr lsr_id, struct fec *fec) | |
860 | { | |
861 | memset(fec, 0, sizeof(*fec)); | |
862 | ||
863 | switch (map->type) { | |
864 | case MAP_TYPE_PREFIX: | |
865 | switch (map->fec.prefix.af) { | |
866 | case AF_INET: | |
867 | fec->type = FEC_TYPE_IPV4; | |
868 | fec->u.ipv4.prefix = map->fec.prefix.prefix.v4; | |
869 | fec->u.ipv4.prefixlen = map->fec.prefix.prefixlen; | |
870 | break; | |
871 | case AF_INET6: | |
872 | fec->type = FEC_TYPE_IPV6; | |
873 | fec->u.ipv6.prefix = map->fec.prefix.prefix.v6; | |
874 | fec->u.ipv6.prefixlen = map->fec.prefix.prefixlen; | |
875 | break; | |
876 | default: | |
877 | fatalx("lde_map2fec: unknown af"); | |
878 | break; | |
879 | } | |
880 | break; | |
881 | case MAP_TYPE_PWID: | |
882 | fec->type = FEC_TYPE_PWID; | |
883 | fec->u.pwid.type = map->fec.pwid.type; | |
884 | fec->u.pwid.pwid = map->fec.pwid.pwid; | |
885 | fec->u.pwid.lsr_id = lsr_id; | |
886 | break; | |
887 | } | |
888 | } | |
889 | ||
890 | void | |
891 | lde_send_labelmapping(struct lde_nbr *ln, struct fec_node *fn, int single) | |
892 | { | |
7c2abbd7 RW |
893 | struct lde_wdraw *lw; |
894 | struct lde_map *me; | |
895 | struct lde_req *lre; | |
896 | struct map map; | |
897 | struct l2vpn_pw *pw; | |
898 | ||
899 | /* | |
900 | * We shouldn't send a new label mapping if we have a pending | |
901 | * label release to receive. In this case, schedule to send a | |
902 | * label mapping as soon as a label release is received. | |
903 | */ | |
904 | lw = (struct lde_wdraw *)fec_find(&ln->sent_wdraw, &fn->fec); | |
905 | if (lw) { | |
906 | if (!fec_find(&ln->sent_map_pending, &fn->fec)) | |
907 | lde_map_pending_add(ln, fn); | |
908 | return; | |
909 | } | |
8429abe0 RW |
910 | |
911 | /* | |
912 | * This function skips SL.1 - 3 and SL.9 - 14 because the label | |
913 | * allocation is done way earlier (because of the merging nature of | |
914 | * ldpd). | |
915 | */ | |
916 | ||
917 | lde_fec2map(&fn->fec, &map); | |
918 | switch (fn->fec.type) { | |
919 | case FEC_TYPE_IPV4: | |
920 | if (!ln->v4_enabled) | |
921 | return; | |
45a8eba9 RW |
922 | if (lde_acl_check(ldeconf->ipv4.acl_label_advertise_to, |
923 | AF_INET, (union ldpd_addr *)&ln->id, 32) != FILTER_PERMIT) | |
924 | return; | |
925 | if (lde_acl_check(ldeconf->ipv4.acl_label_advertise_for, | |
926 | AF_INET, (union ldpd_addr *)&fn->fec.u.ipv4.prefix, | |
927 | fn->fec.u.ipv4.prefixlen) != FILTER_PERMIT) | |
928 | return; | |
8429abe0 RW |
929 | break; |
930 | case FEC_TYPE_IPV6: | |
931 | if (!ln->v6_enabled) | |
932 | return; | |
45a8eba9 RW |
933 | if (lde_acl_check(ldeconf->ipv6.acl_label_advertise_to, |
934 | AF_INET, (union ldpd_addr *)&ln->id, 32) != FILTER_PERMIT) | |
935 | return; | |
936 | if (lde_acl_check(ldeconf->ipv6.acl_label_advertise_for, | |
937 | AF_INET6, (union ldpd_addr *)&fn->fec.u.ipv6.prefix, | |
938 | fn->fec.u.ipv6.prefixlen) != FILTER_PERMIT) | |
939 | return; | |
8429abe0 RW |
940 | break; |
941 | case FEC_TYPE_PWID: | |
942 | pw = (struct l2vpn_pw *) fn->data; | |
943 | if (pw == NULL || pw->lsr_id.s_addr != ln->id.s_addr) | |
944 | /* not the remote end of the pseudowire */ | |
945 | return; | |
946 | ||
947 | map.flags |= F_MAP_PW_IFMTU; | |
948 | map.fec.pwid.ifmtu = pw->l2vpn->mtu; | |
949 | if (pw->flags & F_PW_CWORD) | |
950 | map.flags |= F_MAP_PW_CWORD; | |
951 | if (pw->flags & F_PW_STATUSTLV) { | |
952 | map.flags |= F_MAP_PW_STATUS; | |
953 | /* VPLS are always up */ | |
954 | map.pw_status = PW_FORWARDING; | |
955 | } | |
956 | break; | |
957 | } | |
958 | map.label = fn->local_label; | |
959 | ||
960 | /* SL.6: is there a pending request for this mapping? */ | |
961 | lre = (struct lde_req *)fec_find(&ln->recv_req, &fn->fec); | |
962 | if (lre) { | |
963 | /* set label request msg id in the mapping response. */ | |
964 | map.requestid = lre->msg_id; | |
965 | map.flags = F_MAP_REQ_ID; | |
966 | ||
967 | /* SL.7: delete record of pending request */ | |
968 | lde_req_del(ln, lre, 0); | |
969 | } | |
970 | ||
971 | /* SL.4: send label mapping */ | |
972 | lde_imsg_compose_ldpe(IMSG_MAPPING_ADD, ln->peerid, 0, | |
973 | &map, sizeof(map)); | |
974 | if (single) | |
975 | lde_imsg_compose_ldpe(IMSG_MAPPING_ADD_END, ln->peerid, 0, | |
976 | NULL, 0); | |
977 | ||
978 | /* SL.5: record sent label mapping */ | |
979 | me = (struct lde_map *)fec_find(&ln->sent_map, &fn->fec); | |
980 | if (me == NULL) | |
981 | me = lde_map_add(ln, fn, 1); | |
982 | me->map = map; | |
983 | } | |
984 | ||
985 | void | |
0bcc2916 RW |
986 | lde_send_labelwithdraw(struct lde_nbr *ln, struct fec_node *fn, |
987 | struct map *wcard, struct status_tlv *st) | |
8429abe0 RW |
988 | { |
989 | struct lde_wdraw *lw; | |
990 | struct map map; | |
991 | struct fec *f; | |
992 | struct l2vpn_pw *pw; | |
993 | ||
994 | if (fn) { | |
995 | lde_fec2map(&fn->fec, &map); | |
996 | switch (fn->fec.type) { | |
997 | case FEC_TYPE_IPV4: | |
998 | if (!ln->v4_enabled) | |
999 | return; | |
1000 | break; | |
1001 | case FEC_TYPE_IPV6: | |
1002 | if (!ln->v6_enabled) | |
1003 | return; | |
1004 | break; | |
1005 | case FEC_TYPE_PWID: | |
1006 | pw = (struct l2vpn_pw *) fn->data; | |
1007 | if (pw == NULL || pw->lsr_id.s_addr != ln->id.s_addr) | |
1008 | /* not the remote end of the pseudowire */ | |
1009 | return; | |
1010 | ||
1011 | if (pw->flags & F_PW_CWORD) | |
1012 | map.flags |= F_MAP_PW_CWORD; | |
1013 | break; | |
1014 | } | |
1015 | map.label = fn->local_label; | |
0bcc2916 RW |
1016 | } else |
1017 | memcpy(&map, wcard, sizeof(map)); | |
8429abe0 RW |
1018 | |
1019 | if (st) { | |
1020 | map.st.status_code = st->status_code; | |
1021 | map.st.msg_id = st->msg_id; | |
1022 | map.st.msg_type = st->msg_type; | |
1023 | map.flags |= F_MAP_STATUS; | |
1024 | } | |
1025 | ||
1026 | /* SWd.1: send label withdraw. */ | |
1027 | lde_imsg_compose_ldpe(IMSG_WITHDRAW_ADD, ln->peerid, 0, | |
1028 | &map, sizeof(map)); | |
1029 | lde_imsg_compose_ldpe(IMSG_WITHDRAW_ADD_END, ln->peerid, 0, NULL, 0); | |
1030 | ||
1031 | /* SWd.2: record label withdraw. */ | |
1032 | if (fn) { | |
1033 | lw = (struct lde_wdraw *)fec_find(&ln->sent_wdraw, &fn->fec); | |
1034 | if (lw == NULL) | |
1035 | lw = lde_wdraw_add(ln, fn); | |
1036 | lw->label = map.label; | |
1037 | } else { | |
0bcc2916 RW |
1038 | struct lde_map *me; |
1039 | ||
8429abe0 RW |
1040 | RB_FOREACH(f, fec_tree, &ft) { |
1041 | fn = (struct fec_node *)f; | |
0bcc2916 RW |
1042 | me = (struct lde_map *)fec_find(&ln->sent_map, &fn->fec); |
1043 | if (lde_wildcard_apply(wcard, &fn->fec, me) == 0) | |
1044 | continue; | |
8429abe0 RW |
1045 | |
1046 | lw = (struct lde_wdraw *)fec_find(&ln->sent_wdraw, | |
1047 | &fn->fec); | |
1048 | if (lw == NULL) | |
1049 | lw = lde_wdraw_add(ln, fn); | |
1050 | lw->label = map.label; | |
1051 | } | |
1052 | } | |
1053 | } | |
1054 | ||
1055 | void | |
0bcc2916 | 1056 | lde_send_labelwithdraw_wcard(struct lde_nbr *ln, uint32_t label) |
8429abe0 | 1057 | { |
0bcc2916 | 1058 | struct map wcard; |
8429abe0 | 1059 | |
0bcc2916 RW |
1060 | memset(&wcard, 0, sizeof(wcard)); |
1061 | wcard.type = MAP_TYPE_WILDCARD; | |
1062 | wcard.label = label; | |
1063 | lde_send_labelwithdraw(ln, NULL, &wcard, NULL); | |
8429abe0 RW |
1064 | } |
1065 | ||
d4afb819 RW |
1066 | void |
1067 | lde_send_labelwithdraw_twcard_prefix(struct lde_nbr *ln, uint16_t af, | |
1068 | uint32_t label) | |
1069 | { | |
1070 | struct map wcard; | |
1071 | ||
1072 | memset(&wcard, 0, sizeof(wcard)); | |
1073 | wcard.type = MAP_TYPE_TYPED_WCARD; | |
1074 | wcard.fec.twcard.type = MAP_TYPE_PREFIX; | |
1075 | wcard.fec.twcard.u.prefix_af = af; | |
1076 | wcard.label = label; | |
1077 | lde_send_labelwithdraw(ln, NULL, &wcard, NULL); | |
1078 | } | |
1079 | ||
aba50a83 RW |
1080 | void |
1081 | lde_send_labelwithdraw_twcard_pwid(struct lde_nbr *ln, uint16_t pw_type, | |
1082 | uint32_t label) | |
1083 | { | |
1084 | struct map wcard; | |
1085 | ||
1086 | memset(&wcard, 0, sizeof(wcard)); | |
1087 | wcard.type = MAP_TYPE_TYPED_WCARD; | |
1088 | wcard.fec.twcard.type = MAP_TYPE_PWID; | |
1089 | wcard.fec.twcard.u.pw_type = pw_type; | |
1090 | wcard.label = label; | |
1091 | lde_send_labelwithdraw(ln, NULL, &wcard, NULL); | |
1092 | } | |
1093 | ||
8429abe0 | 1094 | void |
0bcc2916 RW |
1095 | lde_send_labelwithdraw_pwid_wcard(struct lde_nbr *ln, uint16_t pw_type, |
1096 | uint32_t group_id) | |
1097 | { | |
1098 | struct map wcard; | |
1099 | ||
1100 | memset(&wcard, 0, sizeof(wcard)); | |
1101 | wcard.type = MAP_TYPE_PWID; | |
1102 | wcard.fec.pwid.type = pw_type; | |
1103 | wcard.fec.pwid.group_id = group_id; | |
1104 | /* we can not append a Label TLV when using PWid group wildcards. */ | |
1105 | wcard.label = NO_LABEL; | |
1106 | lde_send_labelwithdraw(ln, NULL, &wcard, NULL); | |
1107 | } | |
1108 | ||
1109 | void | |
1110 | lde_send_labelrelease(struct lde_nbr *ln, struct fec_node *fn, | |
1111 | struct map *wcard, uint32_t label) | |
8429abe0 RW |
1112 | { |
1113 | struct map map; | |
1114 | struct l2vpn_pw *pw; | |
1115 | ||
1116 | if (fn) { | |
1117 | lde_fec2map(&fn->fec, &map); | |
1118 | switch (fn->fec.type) { | |
1119 | case FEC_TYPE_IPV4: | |
1120 | if (!ln->v4_enabled) | |
1121 | return; | |
1122 | break; | |
1123 | case FEC_TYPE_IPV6: | |
1124 | if (!ln->v6_enabled) | |
1125 | return; | |
1126 | break; | |
1127 | case FEC_TYPE_PWID: | |
1128 | pw = (struct l2vpn_pw *) fn->data; | |
1129 | if (pw == NULL || pw->lsr_id.s_addr != ln->id.s_addr) | |
1130 | /* not the remote end of the pseudowire */ | |
1131 | return; | |
1132 | ||
1133 | if (pw->flags & F_PW_CWORD) | |
1134 | map.flags |= F_MAP_PW_CWORD; | |
1135 | break; | |
1136 | } | |
0bcc2916 RW |
1137 | } else |
1138 | memcpy(&map, wcard, sizeof(map)); | |
8429abe0 RW |
1139 | map.label = label; |
1140 | ||
1141 | lde_imsg_compose_ldpe(IMSG_RELEASE_ADD, ln->peerid, 0, | |
1142 | &map, sizeof(map)); | |
1143 | lde_imsg_compose_ldpe(IMSG_RELEASE_ADD_END, ln->peerid, 0, NULL, 0); | |
1144 | } | |
1145 | ||
1146 | void | |
05aac414 | 1147 | lde_send_notification(struct lde_nbr *ln, uint32_t status_code, uint32_t msg_id, |
8429abe0 RW |
1148 | uint16_t msg_type) |
1149 | { | |
1150 | struct notify_msg nm; | |
1151 | ||
1152 | memset(&nm, 0, sizeof(nm)); | |
1153 | nm.status_code = status_code; | |
1154 | /* 'msg_id' and 'msg_type' should be in network byte order */ | |
1155 | nm.msg_id = msg_id; | |
1156 | nm.msg_type = msg_type; | |
1157 | ||
05aac414 | 1158 | lde_imsg_compose_ldpe(IMSG_NOTIFICATION_SEND, ln->peerid, 0, |
8429abe0 RW |
1159 | &nm, sizeof(nm)); |
1160 | } | |
1161 | ||
257799cd RW |
1162 | void |
1163 | lde_send_notification_eol_prefix(struct lde_nbr *ln, int af) | |
1164 | { | |
1165 | struct notify_msg nm; | |
1166 | ||
1167 | memset(&nm, 0, sizeof(nm)); | |
1168 | nm.status_code = S_ENDOFLIB; | |
1169 | nm.fec.type = MAP_TYPE_TYPED_WCARD; | |
1170 | nm.fec.fec.twcard.type = MAP_TYPE_PREFIX; | |
1171 | nm.fec.fec.twcard.u.prefix_af = af; | |
1172 | nm.flags |= F_NOTIF_FEC; | |
1173 | ||
1174 | lde_imsg_compose_ldpe(IMSG_NOTIFICATION_SEND, ln->peerid, 0, | |
1175 | &nm, sizeof(nm)); | |
1176 | } | |
1177 | ||
1178 | void | |
1179 | lde_send_notification_eol_pwid(struct lde_nbr *ln, uint16_t pw_type) | |
1180 | { | |
1181 | struct notify_msg nm; | |
1182 | ||
1183 | memset(&nm, 0, sizeof(nm)); | |
1184 | nm.status_code = S_ENDOFLIB; | |
1185 | nm.fec.type = MAP_TYPE_TYPED_WCARD; | |
1186 | nm.fec.fec.twcard.type = MAP_TYPE_PWID; | |
1187 | nm.fec.fec.twcard.u.pw_type = pw_type; | |
1188 | nm.flags |= F_NOTIF_FEC; | |
1189 | ||
1190 | lde_imsg_compose_ldpe(IMSG_NOTIFICATION_SEND, ln->peerid, 0, | |
1191 | &nm, sizeof(nm)); | |
1192 | } | |
1193 | ||
8429abe0 | 1194 | static __inline int |
45926e58 | 1195 | lde_nbr_compare(const struct lde_nbr *a, const struct lde_nbr *b) |
8429abe0 RW |
1196 | { |
1197 | return (a->peerid - b->peerid); | |
1198 | } | |
1199 | ||
1200 | static struct lde_nbr * | |
1201 | lde_nbr_new(uint32_t peerid, struct lde_nbr *new) | |
1202 | { | |
1203 | struct lde_nbr *ln; | |
1204 | ||
1205 | if ((ln = calloc(1, sizeof(*ln))) == NULL) | |
1206 | fatal(__func__); | |
1207 | ||
1208 | ln->id = new->id; | |
1209 | ln->v4_enabled = new->v4_enabled; | |
1210 | ln->v6_enabled = new->v6_enabled; | |
257799cd | 1211 | ln->flags = new->flags; |
8429abe0 RW |
1212 | ln->peerid = peerid; |
1213 | fec_init(&ln->recv_map); | |
1214 | fec_init(&ln->sent_map); | |
7c2abbd7 | 1215 | fec_init(&ln->sent_map_pending); |
8429abe0 RW |
1216 | fec_init(&ln->recv_req); |
1217 | fec_init(&ln->sent_req); | |
1218 | fec_init(&ln->sent_wdraw); | |
1219 | ||
1220 | TAILQ_INIT(&ln->addr_list); | |
1221 | ||
1222 | if (RB_INSERT(nbr_tree, &lde_nbrs, ln) != NULL) | |
1223 | fatalx("lde_nbr_new: RB_INSERT failed"); | |
1224 | ||
1225 | return (ln); | |
1226 | } | |
1227 | ||
1228 | static void | |
1229 | lde_nbr_del(struct lde_nbr *ln) | |
1230 | { | |
1231 | struct fec *f; | |
1232 | struct fec_node *fn; | |
1233 | struct fec_nh *fnh; | |
1234 | struct l2vpn_pw *pw; | |
1235 | ||
1236 | if (ln == NULL) | |
1237 | return; | |
1238 | ||
1239 | /* uninstall received mappings */ | |
1240 | RB_FOREACH(f, fec_tree, &ft) { | |
1241 | fn = (struct fec_node *)f; | |
1242 | ||
1243 | LIST_FOREACH(fnh, &fn->nexthops, entry) { | |
1244 | switch (f->type) { | |
1245 | case FEC_TYPE_IPV4: | |
1246 | case FEC_TYPE_IPV6: | |
1247 | if (!lde_address_find(ln, fnh->af, | |
1248 | &fnh->nexthop)) | |
1249 | continue; | |
1250 | break; | |
1251 | case FEC_TYPE_PWID: | |
1252 | if (f->u.pwid.lsr_id.s_addr != ln->id.s_addr) | |
1253 | continue; | |
1254 | pw = (struct l2vpn_pw *) fn->data; | |
1255 | if (pw) | |
1256 | l2vpn_pw_reset(pw); | |
1257 | break; | |
1258 | default: | |
1259 | break; | |
1260 | } | |
1261 | ||
1262 | lde_send_delete_klabel(fn, fnh); | |
1263 | fnh->remote_label = NO_LABEL; | |
1264 | } | |
1265 | } | |
1266 | ||
1267 | lde_address_list_free(ln); | |
1268 | ||
1269 | fec_clear(&ln->recv_map, lde_map_free); | |
1270 | fec_clear(&ln->sent_map, lde_map_free); | |
7c2abbd7 | 1271 | fec_clear(&ln->sent_map_pending, free); |
8429abe0 RW |
1272 | fec_clear(&ln->recv_req, free); |
1273 | fec_clear(&ln->sent_req, free); | |
1274 | fec_clear(&ln->sent_wdraw, free); | |
1275 | ||
1276 | RB_REMOVE(nbr_tree, &lde_nbrs, ln); | |
1277 | ||
1278 | free(ln); | |
1279 | } | |
1280 | ||
1281 | static struct lde_nbr * | |
1282 | lde_nbr_find(uint32_t peerid) | |
1283 | { | |
1284 | struct lde_nbr ln; | |
1285 | ||
1286 | ln.peerid = peerid; | |
1287 | ||
1288 | return (RB_FIND(nbr_tree, &lde_nbrs, &ln)); | |
1289 | } | |
1290 | ||
1291 | struct lde_nbr * | |
1292 | lde_nbr_find_by_lsrid(struct in_addr addr) | |
1293 | { | |
1294 | struct lde_nbr *ln; | |
1295 | ||
1296 | RB_FOREACH(ln, nbr_tree, &lde_nbrs) | |
1297 | if (ln->id.s_addr == addr.s_addr) | |
1298 | return (ln); | |
1299 | ||
1300 | return (NULL); | |
1301 | } | |
1302 | ||
1303 | struct lde_nbr * | |
1304 | lde_nbr_find_by_addr(int af, union ldpd_addr *addr) | |
1305 | { | |
1306 | struct lde_nbr *ln; | |
1307 | ||
1308 | RB_FOREACH(ln, nbr_tree, &lde_nbrs) | |
1309 | if (lde_address_find(ln, af, addr) != NULL) | |
1310 | return (ln); | |
1311 | ||
1312 | return (NULL); | |
1313 | } | |
1314 | ||
1315 | static void | |
1316 | lde_nbr_clear(void) | |
1317 | { | |
1318 | struct lde_nbr *ln; | |
1319 | ||
45926e58 | 1320 | while ((ln = RB_ROOT(nbr_tree, &lde_nbrs)) != NULL) |
8429abe0 RW |
1321 | lde_nbr_del(ln); |
1322 | } | |
1323 | ||
1324 | static void | |
1325 | lde_nbr_addr_update(struct lde_nbr *ln, struct lde_addr *lde_addr, int removed) | |
1326 | { | |
1327 | struct fec *fec; | |
1328 | struct fec_node *fn; | |
1329 | struct fec_nh *fnh; | |
1330 | struct lde_map *me; | |
1331 | ||
1332 | RB_FOREACH(fec, fec_tree, &ln->recv_map) { | |
8429abe0 RW |
1333 | switch (fec->type) { |
1334 | case FEC_TYPE_IPV4: | |
1335 | if (lde_addr->af != AF_INET) | |
1336 | continue; | |
1337 | break; | |
1338 | case FEC_TYPE_IPV6: | |
1339 | if (lde_addr->af != AF_INET6) | |
1340 | continue; | |
1341 | break; | |
1342 | default: | |
1343 | continue; | |
1344 | } | |
1345 | ||
1e4c8673 RW |
1346 | fn = (struct fec_node *)fec_find(&ft, fec); |
1347 | if (fn == NULL) | |
1348 | /* shouldn't happen */ | |
1349 | continue; | |
1350 | ||
8429abe0 RW |
1351 | LIST_FOREACH(fnh, &fn->nexthops, entry) { |
1352 | if (ldp_addrcmp(fnh->af, &fnh->nexthop, | |
1353 | &lde_addr->addr)) | |
1354 | continue; | |
1355 | ||
1356 | if (removed) { | |
1357 | lde_send_delete_klabel(fn, fnh); | |
1358 | fnh->remote_label = NO_LABEL; | |
1359 | } else { | |
1360 | me = (struct lde_map *)fec; | |
1361 | fnh->remote_label = me->map.label; | |
1362 | lde_send_change_klabel(fn, fnh); | |
1363 | } | |
1364 | break; | |
1365 | } | |
1366 | } | |
1367 | } | |
1368 | ||
d3e1887a | 1369 | static __inline int |
45926e58 | 1370 | lde_map_compare(const struct lde_map *a, const struct lde_map *b) |
d3e1887a RW |
1371 | { |
1372 | return (ldp_addrcmp(AF_INET, (union ldpd_addr *)&a->nexthop->id, | |
1373 | (union ldpd_addr *)&b->nexthop->id)); | |
1374 | } | |
1375 | ||
8429abe0 RW |
1376 | struct lde_map * |
1377 | lde_map_add(struct lde_nbr *ln, struct fec_node *fn, int sent) | |
1378 | { | |
1379 | struct lde_map *me; | |
1380 | ||
1381 | me = calloc(1, sizeof(*me)); | |
1382 | if (me == NULL) | |
1383 | fatal(__func__); | |
1384 | ||
1385 | me->fec = fn->fec; | |
1386 | me->nexthop = ln; | |
1387 | ||
1388 | if (sent) { | |
d3e1887a RW |
1389 | RB_INSERT(lde_map_head, &fn->upstream, me); |
1390 | me->head = &fn->upstream; | |
8429abe0 RW |
1391 | if (fec_insert(&ln->sent_map, &me->fec)) |
1392 | log_warnx("failed to add %s to sent map", | |
1393 | log_fec(&me->fec)); | |
1394 | /* XXX on failure more cleanup is needed */ | |
1395 | } else { | |
d3e1887a RW |
1396 | RB_INSERT(lde_map_head, &fn->downstream, me); |
1397 | me->head = &fn->downstream; | |
8429abe0 RW |
1398 | if (fec_insert(&ln->recv_map, &me->fec)) |
1399 | log_warnx("failed to add %s to recv map", | |
1400 | log_fec(&me->fec)); | |
1401 | } | |
1402 | ||
1403 | return (me); | |
1404 | } | |
1405 | ||
1406 | void | |
1407 | lde_map_del(struct lde_nbr *ln, struct lde_map *me, int sent) | |
1408 | { | |
1409 | if (sent) | |
1410 | fec_remove(&ln->sent_map, &me->fec); | |
1411 | else | |
1412 | fec_remove(&ln->recv_map, &me->fec); | |
1413 | ||
1414 | lde_map_free(me); | |
1415 | } | |
1416 | ||
1417 | static void | |
1418 | lde_map_free(void *ptr) | |
1419 | { | |
1420 | struct lde_map *map = ptr; | |
1421 | ||
d3e1887a | 1422 | RB_REMOVE(lde_map_head, map->head, map); |
8429abe0 RW |
1423 | free(map); |
1424 | } | |
1425 | ||
7c2abbd7 RW |
1426 | struct fec * |
1427 | lde_map_pending_add(struct lde_nbr *ln, struct fec_node *fn) | |
1428 | { | |
1429 | struct fec *map; | |
1430 | ||
1431 | map = calloc(1, sizeof(*map)); | |
1432 | if (map == NULL) | |
1433 | fatal(__func__); | |
1434 | ||
1435 | *map = fn->fec; | |
1436 | if (fec_insert(&ln->sent_map_pending, map)) | |
1437 | log_warnx("failed to add %s to sent map (pending)", | |
1438 | log_fec(map)); | |
1439 | ||
1440 | return (map); | |
1441 | } | |
1442 | ||
1443 | void | |
1444 | lde_map_pending_del(struct lde_nbr *ln, struct fec *map) | |
1445 | { | |
1446 | fec_remove(&ln->sent_map_pending, map); | |
1447 | free(map); | |
1448 | } | |
1449 | ||
8429abe0 RW |
1450 | struct lde_req * |
1451 | lde_req_add(struct lde_nbr *ln, struct fec *fec, int sent) | |
1452 | { | |
1453 | struct fec_tree *t; | |
1454 | struct lde_req *lre; | |
1455 | ||
1456 | t = sent ? &ln->sent_req : &ln->recv_req; | |
1457 | ||
1458 | lre = calloc(1, sizeof(*lre)); | |
1459 | if (lre != NULL) { | |
1460 | lre->fec = *fec; | |
1461 | ||
1462 | if (fec_insert(t, &lre->fec)) { | |
1463 | log_warnx("failed to add %s to %s req", | |
1464 | log_fec(&lre->fec), sent ? "sent" : "recv"); | |
1465 | free(lre); | |
1466 | return (NULL); | |
1467 | } | |
1468 | } | |
1469 | ||
1470 | return (lre); | |
1471 | } | |
1472 | ||
1473 | void | |
1474 | lde_req_del(struct lde_nbr *ln, struct lde_req *lre, int sent) | |
1475 | { | |
1476 | if (sent) | |
1477 | fec_remove(&ln->sent_req, &lre->fec); | |
1478 | else | |
1479 | fec_remove(&ln->recv_req, &lre->fec); | |
1480 | ||
1481 | free(lre); | |
1482 | } | |
1483 | ||
1484 | struct lde_wdraw * | |
1485 | lde_wdraw_add(struct lde_nbr *ln, struct fec_node *fn) | |
1486 | { | |
1487 | struct lde_wdraw *lw; | |
1488 | ||
1489 | lw = calloc(1, sizeof(*lw)); | |
1490 | if (lw == NULL) | |
1491 | fatal(__func__); | |
1492 | ||
1493 | lw->fec = fn->fec; | |
1494 | ||
1495 | if (fec_insert(&ln->sent_wdraw, &lw->fec)) | |
1496 | log_warnx("failed to add %s to sent wdraw", | |
1497 | log_fec(&lw->fec)); | |
1498 | ||
1499 | return (lw); | |
1500 | } | |
1501 | ||
1502 | void | |
1503 | lde_wdraw_del(struct lde_nbr *ln, struct lde_wdraw *lw) | |
1504 | { | |
1505 | fec_remove(&ln->sent_wdraw, &lw->fec); | |
1506 | free(lw); | |
1507 | } | |
1508 | ||
1509 | void | |
45a8eba9 | 1510 | lde_change_egress_label(int af) |
8429abe0 RW |
1511 | { |
1512 | struct lde_nbr *ln; | |
1513 | struct fec *f; | |
1514 | struct fec_node *fn; | |
1515 | ||
be54d744 | 1516 | /* explicitly withdraw all null labels */ |
8429abe0 | 1517 | RB_FOREACH(ln, nbr_tree, &lde_nbrs) { |
0bcc2916 | 1518 | lde_send_labelwithdraw_wcard(ln, MPLS_LABEL_IMPLNULL); |
45a8eba9 | 1519 | if (ln->v4_enabled) |
0bcc2916 | 1520 | lde_send_labelwithdraw_wcard(ln, MPLS_LABEL_IPV4NULL); |
45a8eba9 | 1521 | if (ln->v6_enabled) |
0bcc2916 | 1522 | lde_send_labelwithdraw_wcard(ln, MPLS_LABEL_IPV6NULL); |
be54d744 | 1523 | } |
8429abe0 | 1524 | |
be54d744 RW |
1525 | /* update label of connected routes */ |
1526 | RB_FOREACH(f, fec_tree, &ft) { | |
1527 | fn = (struct fec_node *)f; | |
1528 | if (fn->local_label > MPLS_LABEL_RESERVED_MAX) | |
1529 | continue; | |
8429abe0 | 1530 | |
be54d744 RW |
1531 | switch (af) { |
1532 | case AF_INET: | |
1533 | if (fn->fec.type != FEC_TYPE_IPV4) | |
1534 | continue; | |
1535 | break; | |
1536 | case AF_INET6: | |
1537 | if (fn->fec.type != FEC_TYPE_IPV6) | |
1538 | continue; | |
1539 | break; | |
1540 | default: | |
1541 | fatalx("lde_change_egress_label: unknown af"); | |
8429abe0 RW |
1542 | } |
1543 | ||
8cb1fc45 | 1544 | fn->local_label = lde_update_label(fn); |
45a8eba9 RW |
1545 | if (fn->local_label != NO_LABEL) |
1546 | RB_FOREACH(ln, nbr_tree, &lde_nbrs) | |
1547 | lde_send_labelmapping(ln, fn, 0); | |
be54d744 RW |
1548 | } |
1549 | RB_FOREACH(ln, nbr_tree, &lde_nbrs) | |
8429abe0 RW |
1550 | lde_imsg_compose_ldpe(IMSG_MAPPING_ADD_END, ln->peerid, 0, |
1551 | NULL, 0); | |
8429abe0 RW |
1552 | } |
1553 | ||
1554 | static int | |
1555 | lde_address_add(struct lde_nbr *ln, struct lde_addr *lde_addr) | |
1556 | { | |
1557 | struct lde_addr *new; | |
1558 | ||
1559 | if (lde_address_find(ln, lde_addr->af, &lde_addr->addr) != NULL) | |
1560 | return (-1); | |
1561 | ||
1562 | if ((new = calloc(1, sizeof(*new))) == NULL) | |
1563 | fatal(__func__); | |
1564 | ||
1565 | new->af = lde_addr->af; | |
1566 | new->addr = lde_addr->addr; | |
1567 | TAILQ_INSERT_TAIL(&ln->addr_list, new, entry); | |
1568 | ||
1569 | /* reevaluate the previously received mappings from this neighbor */ | |
1570 | lde_nbr_addr_update(ln, lde_addr, 0); | |
1571 | ||
1572 | return (0); | |
1573 | } | |
1574 | ||
1575 | static int | |
1576 | lde_address_del(struct lde_nbr *ln, struct lde_addr *lde_addr) | |
1577 | { | |
1578 | lde_addr = lde_address_find(ln, lde_addr->af, &lde_addr->addr); | |
1579 | if (lde_addr == NULL) | |
1580 | return (-1); | |
1581 | ||
1582 | /* reevaluate the previously received mappings from this neighbor */ | |
1583 | lde_nbr_addr_update(ln, lde_addr, 1); | |
1584 | ||
1585 | TAILQ_REMOVE(&ln->addr_list, lde_addr, entry); | |
1586 | free(lde_addr); | |
1587 | ||
1588 | return (0); | |
1589 | } | |
1590 | ||
1591 | struct lde_addr * | |
1592 | lde_address_find(struct lde_nbr *ln, int af, union ldpd_addr *addr) | |
1593 | { | |
1594 | struct lde_addr *lde_addr; | |
1595 | ||
1596 | TAILQ_FOREACH(lde_addr, &ln->addr_list, entry) | |
1597 | if (lde_addr->af == af && | |
1598 | ldp_addrcmp(af, &lde_addr->addr, addr) == 0) | |
1599 | return (lde_addr); | |
1600 | ||
1601 | return (NULL); | |
1602 | } | |
1603 | ||
1604 | static void | |
1605 | lde_address_list_free(struct lde_nbr *ln) | |
1606 | { | |
1607 | struct lde_addr *lde_addr; | |
1608 | ||
1609 | while ((lde_addr = TAILQ_FIRST(&ln->addr_list)) != NULL) { | |
1610 | TAILQ_REMOVE(&ln->addr_list, lde_addr, entry); | |
1611 | free(lde_addr); | |
1612 | } | |
1613 | } | |
fea12efb | 1614 | |
5afba51d RW |
1615 | static void |
1616 | zclient_sync_init(u_short instance) | |
1617 | { | |
1618 | /* Initialize special zclient for synchronous message exchanges. */ | |
1619 | log_debug("Initializing synchronous zclient for label manager"); | |
1620 | zclient_sync = zclient_new(master); | |
1621 | zclient_sync->sock = -1; | |
1622 | zclient_sync->redist_default = ZEBRA_ROUTE_LDP; | |
1623 | zclient_sync->instance = instance; | |
1624 | while (zclient_socket_connect(zclient_sync) < 0) { | |
1625 | log_warnx("Error connecting synchronous zclient!"); | |
1626 | sleep(1); | |
1627 | } | |
fa84d193 DL |
1628 | /* make socket non-blocking */ |
1629 | sock_set_nonblock(zclient_sync->sock); | |
5afba51d RW |
1630 | |
1631 | /* Connect to label manager */ | |
1632 | while (lm_label_manager_connect(zclient_sync) != 0) { | |
1633 | log_warnx("Error connecting to label manager!"); | |
1634 | sleep(1); | |
1635 | } | |
1636 | } | |
1637 | ||
fea12efb | 1638 | static void |
1639 | lde_del_label_chunk(void *val) | |
1640 | { | |
1641 | free(val); | |
1642 | } | |
5afba51d | 1643 | |
fea12efb | 1644 | static int |
1645 | lde_get_label_chunk(void) | |
1646 | { | |
5afba51d RW |
1647 | int ret; |
1648 | uint32_t start, end; | |
fea12efb | 1649 | |
1650 | log_debug("Getting label chunk"); | |
1651 | ret = lm_get_label_chunk(zclient_sync, 0, CHUNK_SIZE, &start, &end); | |
5afba51d | 1652 | if (ret < 0) { |
fea12efb | 1653 | log_warnx("Error getting label chunk!"); |
fea12efb | 1654 | return -1; |
1655 | } | |
1656 | ||
1657 | on_get_label_chunk_response(start, end); | |
1658 | ||
5afba51d | 1659 | return (0); |
fea12efb | 1660 | } |
5afba51d | 1661 | |
fea12efb | 1662 | static void |
1663 | lde_label_list_init(void) | |
1664 | { | |
1665 | label_chunk_list = list_new(); | |
1666 | label_chunk_list->del = lde_del_label_chunk; | |
1667 | ||
1668 | /* get first chunk */ | |
73be9aeb | 1669 | while (lde_get_label_chunk () != 0) { |
f2232fdf | 1670 | log_warnx("Error getting first label chunk!"); |
d1fcf957 | 1671 | sleep(1); |
fea12efb | 1672 | } |
1673 | } | |
1674 | ||
1675 | static void | |
1676 | on_get_label_chunk_response(uint32_t start, uint32_t end) | |
1677 | { | |
1678 | struct label_chunk *new_label_chunk; | |
1679 | ||
1680 | log_debug("Label Chunk assign: %u - %u", start, end); | |
1681 | ||
1682 | new_label_chunk = calloc(1, sizeof(struct label_chunk)); | |
66749b59 | 1683 | if (!new_label_chunk) { |
1684 | log_warn("Error trying to allocate label chunk %u - %u", start, end); | |
1685 | return; | |
1686 | } | |
fea12efb | 1687 | |
1688 | new_label_chunk->start = start; | |
1689 | new_label_chunk->end = end; | |
1690 | new_label_chunk->used_mask = 0; | |
1691 | ||
1692 | listnode_add(label_chunk_list, (void *)new_label_chunk); | |
1693 | ||
1694 | /* let's update current if needed */ | |
1695 | if (!current_label_chunk) | |
1696 | current_label_chunk = listtail(label_chunk_list); | |
1697 | } | |
1698 | ||
1699 | static uint32_t | |
1700 | lde_get_next_label(void) | |
1701 | { | |
5afba51d RW |
1702 | struct label_chunk *label_chunk; |
1703 | uint32_t i, pos, size; | |
1704 | uint32_t label = NO_LABEL; | |
fea12efb | 1705 | |
1706 | while (current_label_chunk) { | |
1707 | label_chunk = listgetdata(current_label_chunk); | |
1708 | if (!label_chunk) | |
1709 | goto end; | |
1710 | ||
1711 | /* try to get next free label in currently used label chunk */ | |
1712 | size = label_chunk->end - label_chunk->start + 1; | |
1713 | for (i = 0, pos = 1; i < size; i++, pos <<= 1) { | |
1714 | if (!(pos & label_chunk->used_mask)) { | |
1715 | label_chunk->used_mask |= pos; | |
1716 | label = label_chunk->start + i; | |
1717 | goto end; | |
1718 | } | |
1719 | } | |
1720 | current_label_chunk = listnextnode(current_label_chunk); | |
1721 | } | |
1722 | ||
1723 | end: | |
1724 | /* we moved till the last chunk, or were not able to find a label, | |
1725 | so let's ask for another one */ | |
5afba51d RW |
1726 | if (!current_label_chunk || |
1727 | current_label_chunk == listtail(label_chunk_list) || | |
1728 | label == NO_LABEL) { | |
fea12efb | 1729 | if (lde_get_label_chunk() != 0) |
1730 | log_warn("%s: Error getting label chunk!", __func__); | |
1731 | ||
1732 | } | |
1733 | ||
5afba51d | 1734 | return (label); |
fea12efb | 1735 | } |