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2d33f157 | 1 | /* |
2 | * Server side of OSPF API. | |
3 | * Copyright (C) 2001, 2002 Ralph Keller | |
4 | * | |
5 | * This file is part of GNU Zebra. | |
ac4d0be5 | 6 | * |
2d33f157 | 7 | * GNU Zebra is free software; you can redistribute it and/or modify |
8 | * it under the terms of the GNU General Public License as published | |
9 | * by the Free Software Foundation; either version 2, or (at your | |
10 | * option) any later version. | |
11 | * | |
12 | * GNU Zebra is distributed in the hope that it will be useful, but | |
13 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with GNU Zebra; see the file COPYING. If not, write to the | |
19 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
20 | * Boston, MA 02111-1307, USA. | |
21 | */ | |
22 | ||
23 | #include <zebra.h> | |
24 | ||
25 | #ifdef SUPPORT_OSPF_API | |
2d33f157 | 26 | |
27 | #include "linklist.h" | |
28 | #include "prefix.h" | |
29 | #include "if.h" | |
30 | #include "table.h" | |
31 | #include "memory.h" | |
32 | #include "command.h" | |
33 | #include "vty.h" | |
34 | #include "stream.h" | |
35 | #include "log.h" | |
36 | #include "thread.h" | |
37 | #include "hash.h" | |
ac4d0be5 | 38 | #include "sockunion.h" /* for inet_aton() */ |
2d33f157 | 39 | #include "buffer.h" |
40 | ||
41 | #include <sys/types.h> | |
42 | ||
ac4d0be5 | 43 | #include "ospfd/ospfd.h" /* for "struct thread_master" */ |
2d33f157 | 44 | #include "ospfd/ospf_interface.h" |
45 | #include "ospfd/ospf_ism.h" | |
46 | #include "ospfd/ospf_asbr.h" | |
47 | #include "ospfd/ospf_lsa.h" | |
48 | #include "ospfd/ospf_lsdb.h" | |
49 | #include "ospfd/ospf_neighbor.h" | |
50 | #include "ospfd/ospf_nsm.h" | |
51 | #include "ospfd/ospf_flood.h" | |
52 | #include "ospfd/ospf_packet.h" | |
53 | #include "ospfd/ospf_spf.h" | |
54 | #include "ospfd/ospf_dump.h" | |
55 | #include "ospfd/ospf_route.h" | |
56 | #include "ospfd/ospf_ase.h" | |
57 | #include "ospfd/ospf_zebra.h" | |
58 | ||
59 | #include "ospfd/ospf_api.h" | |
60 | #include "ospfd/ospf_apiserver.h" | |
61 | ||
62 | /* This is an implementation of an API to the OSPF daemon that allows | |
63 | * external applications to access the OSPF daemon through socket | |
64 | * connections. The application can use this API to inject its own | |
65 | * opaque LSAs and flood them to other OSPF daemons. Other OSPF | |
66 | * daemons then receive these LSAs and inform applications through the | |
67 | * API by sending a corresponding message. The application can also | |
68 | * register to receive all LSA types (in addition to opaque types) and | |
69 | * use this information to reconstruct the OSPF's LSDB. The OSPF | |
70 | * daemon supports multiple applications concurrently. */ | |
71 | ||
72 | /* List of all active connections. */ | |
87d6f87a | 73 | struct list *apiserver_list; |
2d33f157 | 74 | |
75 | /* ----------------------------------------------------------- | |
76 | * Functions to lookup interfaces | |
77 | * ----------------------------------------------------------- | |
78 | */ | |
79 | ||
ac4d0be5 | 80 | struct ospf_interface *ospf_apiserver_if_lookup_by_addr(struct in_addr address) |
2d33f157 | 81 | { |
ac4d0be5 | 82 | struct listnode *node, *nnode; |
83 | struct ospf_interface *oi; | |
84 | struct ospf *ospf; | |
99b7c5d6 | 85 | |
ac4d0be5 | 86 | if (!(ospf = ospf_lookup())) |
87 | return NULL; | |
2d33f157 | 88 | |
ac4d0be5 | 89 | for (ALL_LIST_ELEMENTS(ospf->oiflist, node, nnode, oi)) |
90 | if (oi->type != OSPF_IFTYPE_VIRTUALLINK) | |
91 | if (IPV4_ADDR_SAME(&address, &oi->address->u.prefix4)) | |
92 | return oi; | |
87d6f87a | 93 | |
ac4d0be5 | 94 | return NULL; |
2d33f157 | 95 | } |
96 | ||
ac4d0be5 | 97 | struct ospf_interface *ospf_apiserver_if_lookup_by_ifp(struct interface *ifp) |
2d33f157 | 98 | { |
ac4d0be5 | 99 | struct listnode *node, *nnode; |
100 | struct ospf_interface *oi; | |
101 | struct ospf *ospf; | |
99b7c5d6 | 102 | |
ac4d0be5 | 103 | if (!(ospf = ospf_lookup())) |
104 | return NULL; | |
2d33f157 | 105 | |
ac4d0be5 | 106 | for (ALL_LIST_ELEMENTS(ospf->oiflist, node, nnode, oi)) |
107 | if (oi->ifp == ifp) | |
108 | return oi; | |
87d6f87a | 109 | |
ac4d0be5 | 110 | return NULL; |
2d33f157 | 111 | } |
112 | ||
113 | /* ----------------------------------------------------------- | |
114 | * Initialization | |
115 | * ----------------------------------------------------------- | |
116 | */ | |
117 | ||
ac4d0be5 | 118 | unsigned short ospf_apiserver_getport(void) |
2d33f157 | 119 | { |
ac4d0be5 | 120 | struct servent *sp = getservbyname("ospfapi", "tcp"); |
2d33f157 | 121 | |
ac4d0be5 | 122 | return sp ? ntohs(sp->s_port) : OSPF_API_SYNC_PORT; |
2d33f157 | 123 | } |
124 | ||
125 | /* Initialize OSPF API module. Invoked from ospf_opaque_init() */ | |
ac4d0be5 | 126 | int ospf_apiserver_init(void) |
2d33f157 | 127 | { |
ac4d0be5 | 128 | int fd; |
129 | int rc = -1; | |
130 | ||
131 | /* Create new socket for synchronous messages. */ | |
132 | fd = ospf_apiserver_serv_sock_family(ospf_apiserver_getport(), AF_INET); | |
133 | ||
134 | if (fd < 0) | |
135 | goto out; | |
136 | ||
137 | /* Schedule new thread that handles accepted connections. */ | |
138 | ospf_apiserver_event(OSPF_APISERVER_ACCEPT, fd, NULL); | |
139 | ||
140 | /* Initialize list that keeps track of all connections. */ | |
141 | apiserver_list = list_new(); | |
142 | ||
143 | /* Register opaque-independent call back functions. These functions | |
144 | are invoked on ISM, NSM changes and LSA update and LSA deletes */ | |
145 | rc = ospf_register_opaque_functab( | |
146 | 0 /* all LSAs */, 0 /* all opaque types */, | |
147 | ospf_apiserver_new_if, ospf_apiserver_del_if, | |
148 | ospf_apiserver_ism_change, ospf_apiserver_nsm_change, NULL, | |
149 | NULL, NULL, NULL, /* ospf_apiserver_show_info */ | |
150 | NULL, /* originator_func */ | |
151 | NULL, /* ospf_apiserver_lsa_refresher */ | |
152 | ospf_apiserver_lsa_update, ospf_apiserver_lsa_delete); | |
153 | if (rc != 0) { | |
154 | zlog_warn( | |
155 | "ospf_apiserver_init: Failed to register opaque type [0/0]"); | |
156 | } | |
157 | ||
158 | rc = 0; | |
2d33f157 | 159 | |
160 | out: | |
ac4d0be5 | 161 | return rc; |
2d33f157 | 162 | } |
163 | ||
164 | /* Terminate OSPF API module. */ | |
ac4d0be5 | 165 | void ospf_apiserver_term(void) |
2d33f157 | 166 | { |
ac4d0be5 | 167 | struct ospf_apiserver *apiserv; |
168 | ||
169 | /* Unregister wildcard [0/0] type */ | |
170 | ospf_delete_opaque_functab(0 /* all LSAs */, 0 /* all opaque types */); | |
171 | ||
172 | /* | |
173 | * Free all client instances. ospf_apiserver_free removes the node | |
174 | * from the list, so we examine the head of the list anew each time. | |
175 | */ | |
176 | while (apiserver_list | |
177 | && (apiserv = listgetdata(listhead(apiserver_list))) != NULL) | |
178 | ospf_apiserver_free(apiserv); | |
179 | ||
180 | /* Free client list itself */ | |
181 | if (apiserver_list) | |
182 | list_delete(apiserver_list); | |
183 | ||
184 | /* Free wildcard list */ | |
185 | /* XXX */ | |
2d33f157 | 186 | } |
187 | ||
ac4d0be5 | 188 | static struct ospf_apiserver *lookup_apiserver(u_char lsa_type, |
189 | u_char opaque_type) | |
2d33f157 | 190 | { |
ac4d0be5 | 191 | struct listnode *n1, *n2; |
192 | struct registered_opaque_type *r; | |
193 | struct ospf_apiserver *apiserv, *found = NULL; | |
194 | ||
195 | /* XXX: this approaches O(n**2) */ | |
196 | for (ALL_LIST_ELEMENTS_RO(apiserver_list, n1, apiserv)) { | |
197 | for (ALL_LIST_ELEMENTS_RO(apiserv->opaque_types, n2, r)) | |
198 | if (r->lsa_type == lsa_type | |
199 | && r->opaque_type == opaque_type) { | |
200 | found = apiserv; | |
201 | goto out; | |
202 | } | |
203 | } | |
2d33f157 | 204 | out: |
ac4d0be5 | 205 | return found; |
2d33f157 | 206 | } |
207 | ||
ac4d0be5 | 208 | static struct ospf_apiserver *lookup_apiserver_by_lsa(struct ospf_lsa *lsa) |
2d33f157 | 209 | { |
ac4d0be5 | 210 | struct lsa_header *lsah = lsa->data; |
211 | struct ospf_apiserver *found = NULL; | |
212 | ||
213 | if (IS_OPAQUE_LSA(lsah->type)) { | |
214 | found = lookup_apiserver( | |
215 | lsah->type, GET_OPAQUE_TYPE(ntohl(lsah->id.s_addr))); | |
216 | } | |
217 | return found; | |
2d33f157 | 218 | } |
219 | ||
220 | /* ----------------------------------------------------------- | |
221 | * Followings are functions to manage client connections. | |
222 | * ----------------------------------------------------------- | |
223 | */ | |
ac4d0be5 | 224 | static int ospf_apiserver_new_lsa_hook(struct ospf_lsa *lsa) |
2d33f157 | 225 | { |
ac4d0be5 | 226 | if (IS_DEBUG_OSPF_EVENT) |
227 | zlog_debug("API: Put LSA(%p)[%s] into reserve, total=%ld", | |
228 | (void *)lsa, dump_lsa_key(lsa), lsa->lsdb->total); | |
229 | return 0; | |
2d33f157 | 230 | } |
231 | ||
ac4d0be5 | 232 | static int ospf_apiserver_del_lsa_hook(struct ospf_lsa *lsa) |
2d33f157 | 233 | { |
ac4d0be5 | 234 | if (IS_DEBUG_OSPF_EVENT) |
235 | zlog_debug("API: Get LSA(%p)[%s] from reserve, total=%ld", | |
236 | (void *)lsa, dump_lsa_key(lsa), lsa->lsdb->total); | |
237 | return 0; | |
2d33f157 | 238 | } |
239 | ||
240 | /* Allocate new connection structure. */ | |
ac4d0be5 | 241 | struct ospf_apiserver *ospf_apiserver_new(int fd_sync, int fd_async) |
2d33f157 | 242 | { |
ac4d0be5 | 243 | struct ospf_apiserver *new = |
244 | XMALLOC(MTYPE_OSPF_APISERVER, sizeof(struct ospf_apiserver)); | |
2d33f157 | 245 | |
ac4d0be5 | 246 | new->filter = XMALLOC(MTYPE_OSPF_APISERVER_MSGFILTER, |
247 | sizeof(struct lsa_filter_type)); | |
2d33f157 | 248 | |
ac4d0be5 | 249 | new->fd_sync = fd_sync; |
250 | new->fd_async = fd_async; | |
2d33f157 | 251 | |
ac4d0be5 | 252 | /* list of registered opaque types that application uses */ |
253 | new->opaque_types = list_new(); | |
2d33f157 | 254 | |
ac4d0be5 | 255 | /* Initialize temporary strage for LSA instances to be refreshed. */ |
256 | memset(&new->reserve, 0, sizeof(struct ospf_lsdb)); | |
257 | ospf_lsdb_init(&new->reserve); | |
2d33f157 | 258 | |
ac4d0be5 | 259 | new->reserve.new_lsa_hook = ospf_apiserver_new_lsa_hook; /* debug */ |
260 | new->reserve.del_lsa_hook = ospf_apiserver_del_lsa_hook; /* debug */ | |
2d33f157 | 261 | |
ac4d0be5 | 262 | new->out_sync_fifo = msg_fifo_new(); |
263 | new->out_async_fifo = msg_fifo_new(); | |
264 | new->t_sync_read = NULL; | |
2d33f157 | 265 | #ifdef USE_ASYNC_READ |
ac4d0be5 | 266 | new->t_async_read = NULL; |
2d33f157 | 267 | #endif /* USE_ASYNC_READ */ |
ac4d0be5 | 268 | new->t_sync_write = NULL; |
269 | new->t_async_write = NULL; | |
2d33f157 | 270 | |
ac4d0be5 | 271 | new->filter->typemask = 0; /* filter all LSAs */ |
272 | new->filter->origin = ANY_ORIGIN; | |
273 | new->filter->num_areas = 0; | |
2d33f157 | 274 | |
ac4d0be5 | 275 | return new; |
2d33f157 | 276 | } |
277 | ||
ac4d0be5 | 278 | void ospf_apiserver_event(enum event event, int fd, |
279 | struct ospf_apiserver *apiserv) | |
2d33f157 | 280 | { |
ac4d0be5 | 281 | switch (event) { |
282 | case OSPF_APISERVER_ACCEPT: | |
283 | (void)thread_add_read(master, ospf_apiserver_accept, apiserv, | |
284 | fd); | |
285 | break; | |
286 | case OSPF_APISERVER_SYNC_READ: | |
287 | apiserv->t_sync_read = thread_add_read( | |
288 | master, ospf_apiserver_read, apiserv, fd); | |
289 | break; | |
2d33f157 | 290 | #ifdef USE_ASYNC_READ |
ac4d0be5 | 291 | case OSPF_APISERVER_ASYNC_READ: |
292 | apiserv->t_async_read = thread_add_read( | |
293 | master, ospf_apiserver_read, apiserv, fd); | |
294 | break; | |
2d33f157 | 295 | #endif /* USE_ASYNC_READ */ |
ac4d0be5 | 296 | case OSPF_APISERVER_SYNC_WRITE: |
297 | if (!apiserv->t_sync_write) { | |
298 | apiserv->t_sync_write = thread_add_write( | |
299 | master, ospf_apiserver_sync_write, apiserv, fd); | |
300 | } | |
301 | break; | |
302 | case OSPF_APISERVER_ASYNC_WRITE: | |
303 | if (!apiserv->t_async_write) { | |
304 | apiserv->t_async_write = thread_add_write( | |
305 | master, ospf_apiserver_async_write, apiserv, | |
306 | fd); | |
307 | } | |
308 | break; | |
309 | } | |
2d33f157 | 310 | } |
311 | ||
312 | /* Free instance. First unregister all opaque types used by | |
ac4d0be5 | 313 | application, flush opaque LSAs injected by application |
2d33f157 | 314 | from network and close connection. */ |
ac4d0be5 | 315 | void ospf_apiserver_free(struct ospf_apiserver *apiserv) |
2d33f157 | 316 | { |
ac4d0be5 | 317 | struct listnode *node; |
2d33f157 | 318 | |
ac4d0be5 | 319 | /* Cancel read and write threads. */ |
320 | if (apiserv->t_sync_read) { | |
321 | thread_cancel(apiserv->t_sync_read); | |
322 | } | |
2d33f157 | 323 | #ifdef USE_ASYNC_READ |
ac4d0be5 | 324 | if (apiserv->t_async_read) { |
325 | thread_cancel(apiserv->t_async_read); | |
326 | } | |
2d33f157 | 327 | #endif /* USE_ASYNC_READ */ |
ac4d0be5 | 328 | if (apiserv->t_sync_write) { |
329 | thread_cancel(apiserv->t_sync_write); | |
330 | } | |
2d33f157 | 331 | |
ac4d0be5 | 332 | if (apiserv->t_async_write) { |
333 | thread_cancel(apiserv->t_async_write); | |
334 | } | |
2d33f157 | 335 | |
ac4d0be5 | 336 | /* Unregister all opaque types that application registered |
337 | and flush opaque LSAs if still in LSDB. */ | |
2d33f157 | 338 | |
ac4d0be5 | 339 | while ((node = listhead(apiserv->opaque_types)) != NULL) { |
340 | struct registered_opaque_type *regtype = listgetdata(node); | |
2d33f157 | 341 | |
ac4d0be5 | 342 | ospf_apiserver_unregister_opaque_type( |
343 | apiserv, regtype->lsa_type, regtype->opaque_type); | |
344 | } | |
2d33f157 | 345 | |
ac4d0be5 | 346 | /* Close connections to OSPFd. */ |
347 | if (apiserv->fd_sync > 0) { | |
348 | close(apiserv->fd_sync); | |
349 | } | |
2d33f157 | 350 | |
ac4d0be5 | 351 | if (apiserv->fd_async > 0) { |
352 | close(apiserv->fd_async); | |
353 | } | |
2d33f157 | 354 | |
ac4d0be5 | 355 | /* Free fifos */ |
356 | msg_fifo_free(apiserv->out_sync_fifo); | |
357 | msg_fifo_free(apiserv->out_async_fifo); | |
2d33f157 | 358 | |
ac4d0be5 | 359 | /* Clear temporary strage for LSA instances to be refreshed. */ |
360 | ospf_lsdb_delete_all(&apiserv->reserve); | |
361 | ospf_lsdb_cleanup(&apiserv->reserve); | |
2d33f157 | 362 | |
ac4d0be5 | 363 | /* Remove from the list of active clients. */ |
364 | listnode_delete(apiserver_list, apiserv); | |
2d33f157 | 365 | |
ac4d0be5 | 366 | if (IS_DEBUG_OSPF_EVENT) |
367 | zlog_debug("API: Delete apiserv(%p), total#(%d)", | |
368 | (void *)apiserv, apiserver_list->count); | |
2d33f157 | 369 | |
ac4d0be5 | 370 | /* And free instance. */ |
371 | XFREE(MTYPE_OSPF_APISERVER, apiserv); | |
2d33f157 | 372 | } |
373 | ||
ac4d0be5 | 374 | int ospf_apiserver_read(struct thread *thread) |
2d33f157 | 375 | { |
ac4d0be5 | 376 | struct ospf_apiserver *apiserv; |
377 | struct msg *msg; | |
378 | int fd; | |
379 | int rc = -1; | |
380 | enum event event; | |
381 | ||
382 | apiserv = THREAD_ARG(thread); | |
383 | fd = THREAD_FD(thread); | |
384 | ||
385 | if (fd == apiserv->fd_sync) { | |
386 | event = OSPF_APISERVER_SYNC_READ; | |
387 | apiserv->t_sync_read = NULL; | |
388 | ||
389 | if (IS_DEBUG_OSPF_EVENT) | |
390 | zlog_debug("API: ospf_apiserver_read: Peer: %s/%u", | |
391 | inet_ntoa(apiserv->peer_sync.sin_addr), | |
392 | ntohs(apiserv->peer_sync.sin_port)); | |
393 | } | |
2d33f157 | 394 | #ifdef USE_ASYNC_READ |
ac4d0be5 | 395 | else if (fd == apiserv->fd_async) { |
396 | event = OSPF_APISERVER_ASYNC_READ; | |
397 | apiserv->t_async_read = NULL; | |
398 | ||
399 | if (IS_DEBUG_OSPF_EVENT) | |
400 | zlog_debug("API: ospf_apiserver_read: Peer: %s/%u", | |
401 | inet_ntoa(apiserv->peer_async.sin_addr), | |
402 | ntohs(apiserv->peer_async.sin_port)); | |
403 | } | |
2d33f157 | 404 | #endif /* USE_ASYNC_READ */ |
ac4d0be5 | 405 | else { |
406 | zlog_warn("ospf_apiserver_read: Unknown fd(%d)", fd); | |
407 | ospf_apiserver_free(apiserv); | |
408 | goto out; | |
409 | } | |
2d33f157 | 410 | |
ac4d0be5 | 411 | /* Read message from fd. */ |
412 | msg = msg_read(fd); | |
413 | if (msg == NULL) { | |
414 | zlog_warn( | |
415 | "ospf_apiserver_read: read failed on fd=%d, closing connection", | |
416 | fd); | |
2d33f157 | 417 | |
ac4d0be5 | 418 | /* Perform cleanup. */ |
419 | ospf_apiserver_free(apiserv); | |
420 | goto out; | |
421 | } | |
2d33f157 | 422 | |
ac4d0be5 | 423 | if (IS_DEBUG_OSPF_EVENT) |
424 | msg_print(msg); | |
2d33f157 | 425 | |
ac4d0be5 | 426 | /* Dispatch to corresponding message handler. */ |
427 | rc = ospf_apiserver_handle_msg(apiserv, msg); | |
2d33f157 | 428 | |
ac4d0be5 | 429 | /* Prepare for next message, add read thread. */ |
430 | ospf_apiserver_event(event, fd, apiserv); | |
2d33f157 | 431 | |
ac4d0be5 | 432 | msg_free(msg); |
2d33f157 | 433 | |
434 | out: | |
ac4d0be5 | 435 | return rc; |
2d33f157 | 436 | } |
437 | ||
ac4d0be5 | 438 | int ospf_apiserver_sync_write(struct thread *thread) |
2d33f157 | 439 | { |
ac4d0be5 | 440 | struct ospf_apiserver *apiserv; |
441 | struct msg *msg; | |
442 | int fd; | |
443 | int rc = -1; | |
444 | ||
445 | apiserv = THREAD_ARG(thread); | |
446 | assert(apiserv); | |
447 | fd = THREAD_FD(thread); | |
448 | ||
449 | apiserv->t_sync_write = NULL; | |
450 | ||
451 | /* Sanity check */ | |
452 | if (fd != apiserv->fd_sync) { | |
453 | zlog_warn("ospf_apiserver_sync_write: Unknown fd=%d", fd); | |
454 | goto out; | |
455 | } | |
456 | ||
457 | if (IS_DEBUG_OSPF_EVENT) | |
458 | zlog_debug("API: ospf_apiserver_sync_write: Peer: %s/%u", | |
459 | inet_ntoa(apiserv->peer_sync.sin_addr), | |
460 | ntohs(apiserv->peer_sync.sin_port)); | |
461 | ||
462 | /* Check whether there is really a message in the fifo. */ | |
463 | msg = msg_fifo_pop(apiserv->out_sync_fifo); | |
464 | if (!msg) { | |
465 | zlog_warn( | |
466 | "API: ospf_apiserver_sync_write: No message in Sync-FIFO?"); | |
467 | return 0; | |
468 | } | |
469 | ||
470 | if (IS_DEBUG_OSPF_EVENT) | |
471 | msg_print(msg); | |
472 | ||
473 | rc = msg_write(fd, msg); | |
474 | ||
475 | /* Once a message is dequeued, it should be freed anyway. */ | |
476 | msg_free(msg); | |
477 | ||
478 | if (rc < 0) { | |
479 | zlog_warn("ospf_apiserver_sync_write: write failed on fd=%d", | |
480 | fd); | |
481 | goto out; | |
482 | } | |
483 | ||
484 | ||
485 | /* If more messages are in sync message fifo, schedule write thread. */ | |
486 | if (msg_fifo_head(apiserv->out_sync_fifo)) { | |
487 | ospf_apiserver_event(OSPF_APISERVER_SYNC_WRITE, | |
488 | apiserv->fd_sync, apiserv); | |
489 | } | |
490 | ||
491 | out: | |
492 | ||
493 | if (rc < 0) { | |
494 | /* Perform cleanup and disconnect with peer */ | |
495 | ospf_apiserver_free(apiserv); | |
496 | } | |
497 | ||
498 | return rc; | |
2d33f157 | 499 | } |
500 | ||
501 | ||
ac4d0be5 | 502 | int ospf_apiserver_async_write(struct thread *thread) |
2d33f157 | 503 | { |
ac4d0be5 | 504 | struct ospf_apiserver *apiserv; |
505 | struct msg *msg; | |
506 | int fd; | |
507 | int rc = -1; | |
508 | ||
509 | apiserv = THREAD_ARG(thread); | |
510 | assert(apiserv); | |
511 | fd = THREAD_FD(thread); | |
512 | ||
513 | apiserv->t_async_write = NULL; | |
514 | ||
515 | /* Sanity check */ | |
516 | if (fd != apiserv->fd_async) { | |
517 | zlog_warn("ospf_apiserver_async_write: Unknown fd=%d", fd); | |
518 | goto out; | |
519 | } | |
520 | ||
521 | if (IS_DEBUG_OSPF_EVENT) | |
522 | zlog_debug("API: ospf_apiserver_async_write: Peer: %s/%u", | |
523 | inet_ntoa(apiserv->peer_async.sin_addr), | |
524 | ntohs(apiserv->peer_async.sin_port)); | |
525 | ||
526 | /* Check whether there is really a message in the fifo. */ | |
527 | msg = msg_fifo_pop(apiserv->out_async_fifo); | |
528 | if (!msg) { | |
529 | zlog_warn( | |
530 | "API: ospf_apiserver_async_write: No message in Async-FIFO?"); | |
531 | return 0; | |
532 | } | |
533 | ||
534 | if (IS_DEBUG_OSPF_EVENT) | |
535 | msg_print(msg); | |
536 | ||
537 | rc = msg_write(fd, msg); | |
538 | ||
539 | /* Once a message is dequeued, it should be freed anyway. */ | |
540 | msg_free(msg); | |
541 | ||
542 | if (rc < 0) { | |
543 | zlog_warn("ospf_apiserver_async_write: write failed on fd=%d", | |
544 | fd); | |
545 | goto out; | |
546 | } | |
547 | ||
548 | ||
549 | /* If more messages are in async message fifo, schedule write thread. */ | |
550 | if (msg_fifo_head(apiserv->out_async_fifo)) { | |
551 | ospf_apiserver_event(OSPF_APISERVER_ASYNC_WRITE, | |
552 | apiserv->fd_async, apiserv); | |
553 | } | |
554 | ||
555 | out: | |
556 | ||
557 | if (rc < 0) { | |
558 | /* Perform cleanup and disconnect with peer */ | |
559 | ospf_apiserver_free(apiserv); | |
560 | } | |
561 | ||
562 | return rc; | |
2d33f157 | 563 | } |
564 | ||
565 | ||
ac4d0be5 | 566 | int ospf_apiserver_serv_sock_family(unsigned short port, int family) |
2d33f157 | 567 | { |
ac4d0be5 | 568 | union sockunion su; |
569 | int accept_sock; | |
570 | int rc; | |
571 | ||
572 | memset(&su, 0, sizeof(union sockunion)); | |
573 | su.sa.sa_family = family; | |
574 | ||
575 | /* Make new socket */ | |
576 | accept_sock = sockunion_stream_socket(&su); | |
577 | if (accept_sock < 0) | |
578 | return accept_sock; | |
579 | ||
580 | /* This is a server, so reuse address and port */ | |
581 | sockopt_reuseaddr(accept_sock); | |
582 | sockopt_reuseport(accept_sock); | |
583 | ||
584 | /* Bind socket to address and given port. */ | |
585 | rc = sockunion_bind(accept_sock, &su, port, NULL); | |
586 | if (rc < 0) { | |
587 | close(accept_sock); /* Close socket */ | |
588 | return rc; | |
589 | } | |
590 | ||
591 | /* Listen socket under queue length 3. */ | |
592 | rc = listen(accept_sock, 3); | |
593 | if (rc < 0) { | |
594 | zlog_warn("ospf_apiserver_serv_sock_family: listen: %s", | |
595 | safe_strerror(errno)); | |
596 | close(accept_sock); /* Close socket */ | |
597 | return rc; | |
598 | } | |
599 | return accept_sock; | |
2d33f157 | 600 | } |
601 | ||
602 | ||
603 | /* Accept connection request from external applications. For each | |
604 | accepted connection allocate own connection instance. */ | |
ac4d0be5 | 605 | int ospf_apiserver_accept(struct thread *thread) |
2d33f157 | 606 | { |
ac4d0be5 | 607 | int accept_sock; |
608 | int new_sync_sock; | |
609 | int new_async_sock; | |
610 | union sockunion su; | |
611 | struct ospf_apiserver *apiserv; | |
612 | struct sockaddr_in peer_async; | |
613 | struct sockaddr_in peer_sync; | |
614 | unsigned int peerlen; | |
615 | int ret; | |
616 | ||
617 | /* THREAD_ARG (thread) is NULL */ | |
618 | accept_sock = THREAD_FD(thread); | |
619 | ||
620 | /* Keep hearing on socket for further connections. */ | |
621 | ospf_apiserver_event(OSPF_APISERVER_ACCEPT, accept_sock, NULL); | |
622 | ||
623 | memset(&su, 0, sizeof(union sockunion)); | |
624 | /* Accept connection for synchronous messages */ | |
625 | new_sync_sock = sockunion_accept(accept_sock, &su); | |
626 | if (new_sync_sock < 0) { | |
627 | zlog_warn("ospf_apiserver_accept: accept: %s", | |
628 | safe_strerror(errno)); | |
629 | return -1; | |
630 | } | |
631 | ||
632 | /* Get port address and port number of peer to make reverse connection. | |
633 | The reverse channel uses the port number of the peer port+1. */ | |
634 | ||
635 | memset(&peer_sync, 0, sizeof(struct sockaddr_in)); | |
636 | peerlen = sizeof(struct sockaddr_in); | |
637 | ||
638 | ret = getpeername(new_sync_sock, (struct sockaddr *)&peer_sync, | |
639 | &peerlen); | |
640 | if (ret < 0) { | |
641 | zlog_warn("ospf_apiserver_accept: getpeername: %s", | |
642 | safe_strerror(errno)); | |
643 | close(new_sync_sock); | |
644 | return -1; | |
645 | } | |
646 | ||
647 | if (IS_DEBUG_OSPF_EVENT) | |
648 | zlog_debug("API: ospf_apiserver_accept: New peer: %s/%u", | |
649 | inet_ntoa(peer_sync.sin_addr), | |
650 | ntohs(peer_sync.sin_port)); | |
651 | ||
652 | /* Create new socket for asynchronous messages. */ | |
653 | peer_async = peer_sync; | |
654 | peer_async.sin_port = htons(ntohs(peer_sync.sin_port) + 1); | |
655 | ||
656 | /* Check if remote port number to make reverse connection is valid one. | |
657 | */ | |
658 | if (ntohs(peer_async.sin_port) == ospf_apiserver_getport()) { | |
659 | zlog_warn( | |
660 | "API: ospf_apiserver_accept: Peer(%s/%u): Invalid async port number?", | |
661 | inet_ntoa(peer_async.sin_addr), | |
662 | ntohs(peer_async.sin_port)); | |
663 | close(new_sync_sock); | |
664 | return -1; | |
665 | } | |
666 | ||
667 | new_async_sock = socket(AF_INET, SOCK_STREAM, 0); | |
668 | if (new_async_sock < 0) { | |
669 | zlog_warn("ospf_apiserver_accept: socket: %s", | |
670 | safe_strerror(errno)); | |
671 | close(new_sync_sock); | |
672 | return -1; | |
673 | } | |
674 | ||
675 | ret = connect(new_async_sock, (struct sockaddr *)&peer_async, | |
676 | sizeof(struct sockaddr_in)); | |
677 | ||
678 | if (ret < 0) { | |
679 | zlog_warn("ospf_apiserver_accept: connect: %s", | |
680 | safe_strerror(errno)); | |
681 | close(new_sync_sock); | |
682 | close(new_async_sock); | |
683 | return -1; | |
684 | } | |
2d33f157 | 685 | |
686 | #ifdef USE_ASYNC_READ | |
ac4d0be5 | 687 | #else /* USE_ASYNC_READ */ |
688 | /* Make the asynchronous channel write-only. */ | |
689 | ret = shutdown(new_async_sock, SHUT_RD); | |
690 | if (ret < 0) { | |
691 | zlog_warn("ospf_apiserver_accept: shutdown: %s", | |
692 | safe_strerror(errno)); | |
693 | close(new_sync_sock); | |
694 | close(new_async_sock); | |
695 | return -1; | |
696 | } | |
2d33f157 | 697 | #endif /* USE_ASYNC_READ */ |
698 | ||
ac4d0be5 | 699 | /* Allocate new server-side connection structure */ |
700 | apiserv = ospf_apiserver_new(new_sync_sock, new_async_sock); | |
2d33f157 | 701 | |
ac4d0be5 | 702 | /* Add to active connection list */ |
703 | listnode_add(apiserver_list, apiserv); | |
704 | apiserv->peer_sync = peer_sync; | |
705 | apiserv->peer_async = peer_async; | |
2d33f157 | 706 | |
ac4d0be5 | 707 | /* And add read threads for new connection */ |
708 | ospf_apiserver_event(OSPF_APISERVER_SYNC_READ, new_sync_sock, apiserv); | |
2d33f157 | 709 | #ifdef USE_ASYNC_READ |
ac4d0be5 | 710 | ospf_apiserver_event(OSPF_APISERVER_ASYNC_READ, new_async_sock, |
711 | apiserv); | |
2d33f157 | 712 | #endif /* USE_ASYNC_READ */ |
713 | ||
ac4d0be5 | 714 | if (IS_DEBUG_OSPF_EVENT) |
715 | zlog_debug("API: New apiserv(%p), total#(%d)", (void *)apiserv, | |
716 | apiserver_list->count); | |
2d33f157 | 717 | |
ac4d0be5 | 718 | return 0; |
2d33f157 | 719 | } |
720 | ||
721 | ||
722 | /* ----------------------------------------------------------- | |
723 | * Send reply with return code to client application | |
724 | * ----------------------------------------------------------- | |
725 | */ | |
726 | ||
ac4d0be5 | 727 | static int ospf_apiserver_send_msg(struct ospf_apiserver *apiserv, |
728 | struct msg *msg) | |
2d33f157 | 729 | { |
ac4d0be5 | 730 | struct msg_fifo *fifo; |
731 | struct msg *msg2; | |
732 | enum event event; | |
733 | int fd; | |
734 | ||
735 | switch (msg->hdr.msgtype) { | |
736 | case MSG_REPLY: | |
737 | fifo = apiserv->out_sync_fifo; | |
738 | fd = apiserv->fd_sync; | |
739 | event = OSPF_APISERVER_SYNC_WRITE; | |
740 | break; | |
741 | case MSG_READY_NOTIFY: | |
742 | case MSG_LSA_UPDATE_NOTIFY: | |
743 | case MSG_LSA_DELETE_NOTIFY: | |
744 | case MSG_NEW_IF: | |
745 | case MSG_DEL_IF: | |
746 | case MSG_ISM_CHANGE: | |
747 | case MSG_NSM_CHANGE: | |
748 | fifo = apiserv->out_async_fifo; | |
749 | fd = apiserv->fd_async; | |
750 | event = OSPF_APISERVER_ASYNC_WRITE; | |
751 | break; | |
752 | default: | |
753 | zlog_warn("ospf_apiserver_send_msg: Unknown message type %d", | |
754 | msg->hdr.msgtype); | |
755 | return -1; | |
756 | } | |
757 | ||
758 | /* Make a copy of the message and put in the fifo. Once the fifo | |
759 | gets drained by the write thread, the message will be freed. */ | |
760 | /* NB: Given "msg" is untouched in this function. */ | |
761 | msg2 = msg_dup(msg); | |
762 | ||
763 | /* Enqueue message into corresponding fifo queue */ | |
764 | msg_fifo_push(fifo, msg2); | |
765 | ||
766 | /* Schedule write thread */ | |
767 | ospf_apiserver_event(event, fd, apiserv); | |
768 | return 0; | |
2d33f157 | 769 | } |
770 | ||
ac4d0be5 | 771 | int ospf_apiserver_send_reply(struct ospf_apiserver *apiserv, u_int32_t seqnr, |
772 | u_char rc) | |
2d33f157 | 773 | { |
ac4d0be5 | 774 | struct msg *msg = new_msg_reply(seqnr, rc); |
775 | int ret; | |
2d33f157 | 776 | |
ac4d0be5 | 777 | if (!msg) { |
778 | zlog_warn("ospf_apiserver_send_reply: msg_new failed"); | |
2d33f157 | 779 | #ifdef NOTYET |
ac4d0be5 | 780 | /* Cannot allocate new message. What should we do? */ |
781 | ospf_apiserver_free(apiserv); | |
2d33f157 | 782 | #endif |
ac4d0be5 | 783 | return -1; |
784 | } | |
2d33f157 | 785 | |
ac4d0be5 | 786 | ret = ospf_apiserver_send_msg(apiserv, msg); |
787 | msg_free(msg); | |
788 | return ret; | |
2d33f157 | 789 | } |
790 | ||
791 | ||
792 | /* ----------------------------------------------------------- | |
793 | * Generic message dispatching handler function | |
794 | * ----------------------------------------------------------- | |
795 | */ | |
796 | ||
ac4d0be5 | 797 | int ospf_apiserver_handle_msg(struct ospf_apiserver *apiserv, struct msg *msg) |
2d33f157 | 798 | { |
ac4d0be5 | 799 | int rc; |
800 | ||
801 | /* Call corresponding message handler function. */ | |
802 | switch (msg->hdr.msgtype) { | |
803 | case MSG_REGISTER_OPAQUETYPE: | |
804 | rc = ospf_apiserver_handle_register_opaque_type(apiserv, msg); | |
805 | break; | |
806 | case MSG_UNREGISTER_OPAQUETYPE: | |
807 | rc = ospf_apiserver_handle_unregister_opaque_type(apiserv, msg); | |
808 | break; | |
809 | case MSG_REGISTER_EVENT: | |
810 | rc = ospf_apiserver_handle_register_event(apiserv, msg); | |
811 | break; | |
812 | case MSG_SYNC_LSDB: | |
813 | rc = ospf_apiserver_handle_sync_lsdb(apiserv, msg); | |
814 | break; | |
815 | case MSG_ORIGINATE_REQUEST: | |
816 | rc = ospf_apiserver_handle_originate_request(apiserv, msg); | |
817 | break; | |
818 | case MSG_DELETE_REQUEST: | |
819 | rc = ospf_apiserver_handle_delete_request(apiserv, msg); | |
820 | break; | |
821 | default: | |
822 | zlog_warn("ospf_apiserver_handle_msg: Unknown message type: %d", | |
823 | msg->hdr.msgtype); | |
824 | rc = -1; | |
825 | } | |
826 | return rc; | |
2d33f157 | 827 | } |
828 | ||
829 | ||
830 | /* ----------------------------------------------------------- | |
831 | * Following are functions for opaque type registration | |
832 | * ----------------------------------------------------------- | |
833 | */ | |
834 | ||
ac4d0be5 | 835 | int ospf_apiserver_register_opaque_type(struct ospf_apiserver *apiserv, |
836 | u_char lsa_type, u_char opaque_type) | |
2d33f157 | 837 | { |
ac4d0be5 | 838 | struct registered_opaque_type *regtype; |
839 | int (*originator_func)(void *arg); | |
840 | int rc; | |
841 | ||
842 | switch (lsa_type) { | |
843 | case OSPF_OPAQUE_LINK_LSA: | |
844 | originator_func = ospf_apiserver_lsa9_originator; | |
845 | break; | |
846 | case OSPF_OPAQUE_AREA_LSA: | |
847 | originator_func = ospf_apiserver_lsa10_originator; | |
848 | break; | |
849 | case OSPF_OPAQUE_AS_LSA: | |
850 | originator_func = ospf_apiserver_lsa11_originator; | |
851 | break; | |
852 | default: | |
853 | zlog_warn("ospf_apiserver_register_opaque_type: lsa_type(%d)", | |
854 | lsa_type); | |
855 | return OSPF_API_ILLEGALLSATYPE; | |
856 | } | |
857 | ||
858 | ||
859 | /* Register opaque function table */ | |
860 | /* NB: Duplicated registration will be detected inside the function. */ | |
861 | rc = ospf_register_opaque_functab( | |
862 | lsa_type, opaque_type, NULL, /* ospf_apiserver_new_if */ | |
863 | NULL, /* ospf_apiserver_del_if */ | |
864 | NULL, /* ospf_apiserver_ism_change */ | |
865 | NULL, /* ospf_apiserver_nsm_change */ | |
866 | NULL, NULL, NULL, ospf_apiserver_show_info, originator_func, | |
867 | ospf_apiserver_lsa_refresher, | |
868 | NULL, /* ospf_apiserver_lsa_update */ | |
869 | NULL /* ospf_apiserver_lsa_delete */); | |
870 | ||
871 | if (rc != 0) { | |
872 | zlog_warn("Failed to register opaque type [%d/%d]", lsa_type, | |
873 | opaque_type); | |
874 | return OSPF_API_OPAQUETYPEINUSE; | |
875 | } | |
876 | ||
877 | /* Remember the opaque type that application registers so when | |
878 | connection shuts down, we can flush all LSAs of this opaque | |
879 | type. */ | |
880 | ||
881 | regtype = XCALLOC(MTYPE_OSPF_APISERVER, | |
882 | sizeof(struct registered_opaque_type)); | |
883 | regtype->lsa_type = lsa_type; | |
884 | regtype->opaque_type = opaque_type; | |
885 | ||
886 | /* Add to list of registered opaque types */ | |
887 | listnode_add(apiserv->opaque_types, regtype); | |
888 | ||
889 | if (IS_DEBUG_OSPF_EVENT) | |
890 | zlog_debug( | |
891 | "API: Add LSA-type(%d)/Opaque-type(%d) into" | |
892 | " apiserv(%p), total#(%d)", | |
893 | lsa_type, opaque_type, (void *)apiserv, | |
894 | listcount(apiserv->opaque_types)); | |
895 | ||
896 | return 0; | |
2d33f157 | 897 | } |
898 | ||
ac4d0be5 | 899 | int ospf_apiserver_unregister_opaque_type(struct ospf_apiserver *apiserv, |
900 | u_char lsa_type, u_char opaque_type) | |
2d33f157 | 901 | { |
ac4d0be5 | 902 | struct listnode *node, *nnode; |
903 | struct registered_opaque_type *regtype; | |
2d33f157 | 904 | |
ac4d0be5 | 905 | for (ALL_LIST_ELEMENTS(apiserv->opaque_types, node, nnode, regtype)) { |
906 | /* Check if we really registered this opaque type */ | |
907 | if (regtype->lsa_type == lsa_type | |
908 | && regtype->opaque_type == opaque_type) { | |
2d33f157 | 909 | |
ac4d0be5 | 910 | /* Yes, we registered this opaque type. Flush |
911 | all existing opaque LSAs of this type */ | |
2d33f157 | 912 | |
ac4d0be5 | 913 | ospf_apiserver_flush_opaque_lsa(apiserv, lsa_type, |
914 | opaque_type); | |
915 | ospf_delete_opaque_functab(lsa_type, opaque_type); | |
2d33f157 | 916 | |
ac4d0be5 | 917 | /* Remove from list of registered opaque types */ |
918 | listnode_delete(apiserv->opaque_types, regtype); | |
2d33f157 | 919 | |
ac4d0be5 | 920 | if (IS_DEBUG_OSPF_EVENT) |
921 | zlog_debug( | |
922 | "API: Del LSA-type(%d)/Opaque-type(%d)" | |
923 | " from apiserv(%p), total#(%d)", | |
924 | lsa_type, opaque_type, (void *)apiserv, | |
925 | listcount(apiserv->opaque_types)); | |
2d33f157 | 926 | |
ac4d0be5 | 927 | return 0; |
928 | } | |
2d33f157 | 929 | } |
2d33f157 | 930 | |
ac4d0be5 | 931 | /* Opaque type is not registered */ |
932 | zlog_warn("Failed to unregister opaque type [%d/%d]", lsa_type, | |
933 | opaque_type); | |
934 | return OSPF_API_OPAQUETYPENOTREGISTERED; | |
2d33f157 | 935 | } |
936 | ||
937 | ||
ac4d0be5 | 938 | static int apiserver_is_opaque_type_registered(struct ospf_apiserver *apiserv, |
939 | u_char lsa_type, | |
940 | u_char opaque_type) | |
2d33f157 | 941 | { |
ac4d0be5 | 942 | struct listnode *node, *nnode; |
943 | struct registered_opaque_type *regtype; | |
944 | ||
945 | /* XXX: how many types are there? if few, why not just a bitmap? */ | |
946 | for (ALL_LIST_ELEMENTS(apiserv->opaque_types, node, nnode, regtype)) { | |
947 | /* Check if we really registered this opaque type */ | |
948 | if (regtype->lsa_type == lsa_type | |
949 | && regtype->opaque_type == opaque_type) { | |
950 | /* Yes registered */ | |
951 | return 1; | |
952 | } | |
953 | } | |
954 | /* Not registered */ | |
955 | return 0; | |
2d33f157 | 956 | } |
957 | ||
ac4d0be5 | 958 | int ospf_apiserver_handle_register_opaque_type(struct ospf_apiserver *apiserv, |
959 | struct msg *msg) | |
2d33f157 | 960 | { |
ac4d0be5 | 961 | struct msg_register_opaque_type *rmsg; |
962 | u_char lsa_type; | |
963 | u_char opaque_type; | |
964 | int rc = 0; | |
965 | ||
966 | /* Extract parameters from register opaque type message */ | |
967 | rmsg = (struct msg_register_opaque_type *)STREAM_DATA(msg->s); | |
968 | ||
969 | lsa_type = rmsg->lsatype; | |
970 | opaque_type = rmsg->opaquetype; | |
971 | ||
972 | rc = ospf_apiserver_register_opaque_type(apiserv, lsa_type, | |
973 | opaque_type); | |
974 | ||
975 | /* Send a reply back to client including return code */ | |
976 | rc = ospf_apiserver_send_reply(apiserv, ntohl(msg->hdr.msgseq), rc); | |
977 | if (rc < 0) | |
978 | goto out; | |
979 | ||
980 | /* Now inform application about opaque types that are ready */ | |
981 | switch (lsa_type) { | |
982 | case OSPF_OPAQUE_LINK_LSA: | |
983 | ospf_apiserver_notify_ready_type9(apiserv); | |
984 | break; | |
985 | case OSPF_OPAQUE_AREA_LSA: | |
986 | ospf_apiserver_notify_ready_type10(apiserv); | |
987 | break; | |
988 | case OSPF_OPAQUE_AS_LSA: | |
989 | ospf_apiserver_notify_ready_type11(apiserv); | |
990 | break; | |
991 | } | |
2d33f157 | 992 | out: |
ac4d0be5 | 993 | return rc; |
2d33f157 | 994 | } |
995 | ||
996 | ||
997 | /* Notify specific client about all opaque types 9 that are ready. */ | |
ac4d0be5 | 998 | void ospf_apiserver_notify_ready_type9(struct ospf_apiserver *apiserv) |
2d33f157 | 999 | { |
ac4d0be5 | 1000 | struct listnode *node, *nnode; |
1001 | struct listnode *node2, *nnode2; | |
1002 | struct ospf *ospf; | |
1003 | struct ospf_interface *oi; | |
1004 | struct registered_opaque_type *r; | |
1005 | ||
1006 | ospf = ospf_lookup(); | |
1007 | ||
1008 | for (ALL_LIST_ELEMENTS(ospf->oiflist, node, nnode, oi)) { | |
1009 | /* Check if this interface is indeed ready for type 9 */ | |
1010 | if (!ospf_apiserver_is_ready_type9(oi)) | |
1011 | continue; | |
1012 | ||
1013 | /* Check for registered opaque type 9 types */ | |
1014 | /* XXX: loop-de-loop - optimise me */ | |
1015 | for (ALL_LIST_ELEMENTS(apiserv->opaque_types, node2, nnode2, | |
1016 | r)) { | |
1017 | struct msg *msg; | |
1018 | ||
1019 | if (r->lsa_type == OSPF_OPAQUE_LINK_LSA) { | |
1020 | ||
1021 | /* Yes, this opaque type is ready */ | |
1022 | msg = new_msg_ready_notify( | |
1023 | 0, OSPF_OPAQUE_LINK_LSA, r->opaque_type, | |
1024 | oi->address->u.prefix4); | |
1025 | if (!msg) { | |
1026 | zlog_warn( | |
1027 | "apiserver_notify_ready_type9: msg_new failed"); | |
2d33f157 | 1028 | #ifdef NOTYET |
ac4d0be5 | 1029 | /* Cannot allocate new message. What |
1030 | * should we do? */ | |
1031 | ospf_apiserver_free(apiserv); | |
2d33f157 | 1032 | #endif |
ac4d0be5 | 1033 | goto out; |
1034 | } | |
1035 | ospf_apiserver_send_msg(apiserv, msg); | |
1036 | msg_free(msg); | |
1037 | } | |
2d33f157 | 1038 | } |
2d33f157 | 1039 | } |
2d33f157 | 1040 | |
1041 | out: | |
ac4d0be5 | 1042 | return; |
2d33f157 | 1043 | } |
1044 | ||
1045 | ||
1046 | /* Notify specific client about all opaque types 10 that are ready. */ | |
ac4d0be5 | 1047 | void ospf_apiserver_notify_ready_type10(struct ospf_apiserver *apiserv) |
2d33f157 | 1048 | { |
ac4d0be5 | 1049 | struct listnode *node, *nnode; |
1050 | struct listnode *node2, *nnode2; | |
1051 | struct ospf *ospf; | |
1052 | struct ospf_area *area; | |
1053 | ||
1054 | ospf = ospf_lookup(); | |
1055 | ||
1056 | for (ALL_LIST_ELEMENTS(ospf->areas, node, nnode, area)) { | |
1057 | struct registered_opaque_type *r; | |
1058 | ||
1059 | if (!ospf_apiserver_is_ready_type10(area)) { | |
1060 | continue; | |
1061 | } | |
1062 | ||
1063 | /* Check for registered opaque type 10 types */ | |
1064 | /* XXX: loop in loop - optimise me */ | |
1065 | for (ALL_LIST_ELEMENTS(apiserv->opaque_types, node2, nnode2, | |
1066 | r)) { | |
1067 | struct msg *msg; | |
1068 | ||
1069 | if (r->lsa_type == OSPF_OPAQUE_AREA_LSA) { | |
1070 | /* Yes, this opaque type is ready */ | |
1071 | msg = new_msg_ready_notify( | |
1072 | 0, OSPF_OPAQUE_AREA_LSA, r->opaque_type, | |
1073 | area->area_id); | |
1074 | if (!msg) { | |
1075 | zlog_warn( | |
1076 | "apiserver_notify_ready_type10: msg_new failed"); | |
2d33f157 | 1077 | #ifdef NOTYET |
ac4d0be5 | 1078 | /* Cannot allocate new message. What |
1079 | * should we do? */ | |
1080 | ospf_apiserver_free(apiserv); | |
2d33f157 | 1081 | #endif |
ac4d0be5 | 1082 | goto out; |
1083 | } | |
1084 | ospf_apiserver_send_msg(apiserv, msg); | |
1085 | msg_free(msg); | |
1086 | } | |
2d33f157 | 1087 | } |
2d33f157 | 1088 | } |
2d33f157 | 1089 | |
1090 | out: | |
ac4d0be5 | 1091 | return; |
2d33f157 | 1092 | } |
1093 | ||
1094 | /* Notify specific client about all opaque types 11 that are ready */ | |
ac4d0be5 | 1095 | void ospf_apiserver_notify_ready_type11(struct ospf_apiserver *apiserv) |
2d33f157 | 1096 | { |
ac4d0be5 | 1097 | struct listnode *node, *nnode; |
1098 | struct ospf *ospf; | |
1099 | struct registered_opaque_type *r; | |
1100 | ||
1101 | ospf = ospf_lookup(); | |
1102 | ||
1103 | /* Can type 11 be originated? */ | |
1104 | if (!ospf_apiserver_is_ready_type11(ospf)) | |
1105 | goto out; | |
1106 | ||
1107 | /* Check for registered opaque type 11 types */ | |
1108 | for (ALL_LIST_ELEMENTS(apiserv->opaque_types, node, nnode, r)) { | |
1109 | struct msg *msg; | |
1110 | struct in_addr noarea_id = {.s_addr = 0L}; | |
1111 | ||
1112 | if (r->lsa_type == OSPF_OPAQUE_AS_LSA) { | |
1113 | /* Yes, this opaque type is ready */ | |
1114 | msg = new_msg_ready_notify(0, OSPF_OPAQUE_AS_LSA, | |
1115 | r->opaque_type, noarea_id); | |
1116 | ||
1117 | if (!msg) { | |
1118 | zlog_warn( | |
1119 | "apiserver_notify_ready_type11: msg_new failed"); | |
2d33f157 | 1120 | #ifdef NOTYET |
ac4d0be5 | 1121 | /* Cannot allocate new message. What should we |
1122 | * do? */ | |
1123 | ospf_apiserver_free(apiserv); | |
2d33f157 | 1124 | #endif |
ac4d0be5 | 1125 | goto out; |
1126 | } | |
1127 | ospf_apiserver_send_msg(apiserv, msg); | |
1128 | msg_free(msg); | |
1129 | } | |
2d33f157 | 1130 | } |
2d33f157 | 1131 | |
1132 | out: | |
ac4d0be5 | 1133 | return; |
2d33f157 | 1134 | } |
1135 | ||
ac4d0be5 | 1136 | int ospf_apiserver_handle_unregister_opaque_type(struct ospf_apiserver *apiserv, |
1137 | struct msg *msg) | |
2d33f157 | 1138 | { |
ac4d0be5 | 1139 | struct msg_unregister_opaque_type *umsg; |
1140 | u_char ltype; | |
1141 | u_char otype; | |
1142 | int rc = 0; | |
2d33f157 | 1143 | |
ac4d0be5 | 1144 | /* Extract parameters from unregister opaque type message */ |
1145 | umsg = (struct msg_unregister_opaque_type *)STREAM_DATA(msg->s); | |
2d33f157 | 1146 | |
ac4d0be5 | 1147 | ltype = umsg->lsatype; |
1148 | otype = umsg->opaquetype; | |
2d33f157 | 1149 | |
ac4d0be5 | 1150 | rc = ospf_apiserver_unregister_opaque_type(apiserv, ltype, otype); |
2d33f157 | 1151 | |
ac4d0be5 | 1152 | /* Send a reply back to client including return code */ |
1153 | rc = ospf_apiserver_send_reply(apiserv, ntohl(msg->hdr.msgseq), rc); | |
2d33f157 | 1154 | |
ac4d0be5 | 1155 | return rc; |
2d33f157 | 1156 | } |
1157 | ||
1158 | ||
1159 | /* ----------------------------------------------------------- | |
1160 | * Following are functions for event (filter) registration. | |
1161 | * ----------------------------------------------------------- | |
1162 | */ | |
ac4d0be5 | 1163 | int ospf_apiserver_handle_register_event(struct ospf_apiserver *apiserv, |
1164 | struct msg *msg) | |
2d33f157 | 1165 | { |
ac4d0be5 | 1166 | struct msg_register_event *rmsg; |
1167 | int rc; | |
1168 | u_int32_t seqnum; | |
1169 | ||
1170 | rmsg = (struct msg_register_event *)STREAM_DATA(msg->s); | |
1171 | ||
1172 | /* Get request sequence number */ | |
1173 | seqnum = msg_get_seq(msg); | |
1174 | ||
1175 | /* Free existing filter in apiserv. */ | |
1176 | XFREE(MTYPE_OSPF_APISERVER_MSGFILTER, apiserv->filter); | |
1177 | /* Alloc new space for filter. */ | |
1178 | ||
1179 | apiserv->filter = | |
1180 | XMALLOC(MTYPE_OSPF_APISERVER_MSGFILTER, ntohs(msg->hdr.msglen)); | |
1181 | if (apiserv->filter) { | |
1182 | /* copy it over. */ | |
1183 | memcpy(apiserv->filter, &rmsg->filter, ntohs(msg->hdr.msglen)); | |
1184 | rc = OSPF_API_OK; | |
1185 | } else { | |
1186 | rc = OSPF_API_NOMEMORY; | |
1187 | } | |
1188 | /* Send a reply back to client with return code */ | |
1189 | rc = ospf_apiserver_send_reply(apiserv, seqnum, rc); | |
1190 | return rc; | |
2d33f157 | 1191 | } |
1192 | ||
1193 | ||
1194 | /* ----------------------------------------------------------- | |
1195 | * Followings are functions for LSDB synchronization. | |
1196 | * ----------------------------------------------------------- | |
1197 | */ | |
1198 | ||
ac4d0be5 | 1199 | static int apiserver_sync_callback(struct ospf_lsa *lsa, void *p_arg, |
1200 | int int_arg) | |
2d33f157 | 1201 | { |
ac4d0be5 | 1202 | struct ospf_apiserver *apiserv; |
1203 | int seqnum; | |
1204 | struct msg *msg; | |
1205 | struct param_t { | |
1206 | struct ospf_apiserver *apiserv; | |
1207 | struct lsa_filter_type *filter; | |
1208 | } * param; | |
1209 | int rc = -1; | |
1210 | ||
1211 | /* Sanity check */ | |
1212 | assert(lsa->data); | |
1213 | assert(p_arg); | |
1214 | ||
1215 | param = (struct param_t *)p_arg; | |
1216 | apiserv = param->apiserv; | |
1217 | seqnum = (u_int32_t)int_arg; | |
1218 | ||
1219 | /* Check origin in filter. */ | |
1220 | if ((param->filter->origin == ANY_ORIGIN) | |
1221 | || (param->filter->origin == (lsa->flags & OSPF_LSA_SELF))) { | |
1222 | ||
1223 | /* Default area for AS-External and Opaque11 LSAs */ | |
1224 | struct in_addr area_id = {.s_addr = 0L}; | |
1225 | ||
1226 | /* Default interface for non Opaque9 LSAs */ | |
1227 | struct in_addr ifaddr = {.s_addr = 0L}; | |
1228 | ||
1229 | if (lsa->area) { | |
1230 | area_id = lsa->area->area_id; | |
1231 | } | |
1232 | if (lsa->data->type == OSPF_OPAQUE_LINK_LSA) { | |
1233 | ifaddr = lsa->oi->address->u.prefix4; | |
1234 | } | |
1235 | ||
1236 | msg = new_msg_lsa_change_notify( | |
1237 | MSG_LSA_UPDATE_NOTIFY, seqnum, ifaddr, area_id, | |
1238 | lsa->flags & OSPF_LSA_SELF, lsa->data); | |
1239 | if (!msg) { | |
1240 | zlog_warn( | |
1241 | "apiserver_sync_callback: new_msg_update failed"); | |
2d33f157 | 1242 | #ifdef NOTYET |
ac4d0be5 | 1243 | /* Cannot allocate new message. What should we do? */ |
1244 | /* ospf_apiserver_free (apiserv);*/ /* Do nothing | |
1245 | here XXX | |
1246 | */ | |
2d33f157 | 1247 | #endif |
ac4d0be5 | 1248 | goto out; |
1249 | } | |
2d33f157 | 1250 | |
ac4d0be5 | 1251 | /* Send LSA */ |
1252 | ospf_apiserver_send_msg(apiserv, msg); | |
1253 | msg_free(msg); | |
1254 | } | |
1255 | rc = 0; | |
2d33f157 | 1256 | |
1257 | out: | |
ac4d0be5 | 1258 | return rc; |
2d33f157 | 1259 | } |
1260 | ||
ac4d0be5 | 1261 | int ospf_apiserver_handle_sync_lsdb(struct ospf_apiserver *apiserv, |
1262 | struct msg *msg) | |
2d33f157 | 1263 | { |
ac4d0be5 | 1264 | struct listnode *node, *nnode; |
1265 | u_int32_t seqnum; | |
1266 | int rc = 0; | |
1267 | struct msg_sync_lsdb *smsg; | |
1268 | struct ospf_apiserver_param_t { | |
1269 | struct ospf_apiserver *apiserv; | |
1270 | struct lsa_filter_type *filter; | |
1271 | } param; | |
1272 | u_int16_t mask; | |
1273 | struct route_node *rn; | |
1274 | struct ospf_lsa *lsa; | |
1275 | struct ospf *ospf; | |
1276 | struct ospf_area *area; | |
1277 | ||
1278 | ospf = ospf_lookup(); | |
1279 | ||
1280 | /* Get request sequence number */ | |
1281 | seqnum = msg_get_seq(msg); | |
1282 | /* Set sync msg. */ | |
1283 | smsg = (struct msg_sync_lsdb *)STREAM_DATA(msg->s); | |
1284 | ||
1285 | /* Set parameter struct. */ | |
1286 | param.apiserv = apiserv; | |
1287 | param.filter = &smsg->filter; | |
1288 | ||
1289 | /* Remember mask. */ | |
1290 | mask = ntohs(smsg->filter.typemask); | |
1291 | ||
1292 | /* Iterate over all areas. */ | |
1293 | for (ALL_LIST_ELEMENTS(ospf->areas, node, nnode, area)) { | |
1294 | int i; | |
1295 | u_int32_t *area_id = NULL; | |
1296 | ||
1297 | /* Compare area_id with area_ids in sync request. */ | |
1298 | if ((i = smsg->filter.num_areas) > 0) { | |
1299 | /* Let area_id point to the list of area IDs, | |
1300 | * which is at the end of smsg->filter. */ | |
1301 | area_id = (u_int32_t *)(&smsg->filter + 1); | |
1302 | while (i) { | |
1303 | if (*area_id == area->area_id.s_addr) { | |
1304 | break; | |
1305 | } | |
1306 | i--; | |
1307 | area_id++; | |
1308 | } | |
1309 | } else { | |
1310 | i = 1; | |
2d33f157 | 1311 | } |
ac4d0be5 | 1312 | |
1313 | /* If area was found, then i>0 here. */ | |
1314 | if (i) { | |
1315 | /* Check msg type. */ | |
1316 | if (mask & Power2[OSPF_ROUTER_LSA]) | |
1317 | LSDB_LOOP(ROUTER_LSDB(area), rn, lsa) | |
1318 | apiserver_sync_callback(lsa, (void *)¶m, seqnum); | |
1319 | if (mask & Power2[OSPF_NETWORK_LSA]) | |
1320 | LSDB_LOOP(NETWORK_LSDB(area), rn, lsa) | |
1321 | apiserver_sync_callback(lsa, (void *)¶m, seqnum); | |
1322 | if (mask & Power2[OSPF_SUMMARY_LSA]) | |
1323 | LSDB_LOOP(SUMMARY_LSDB(area), rn, lsa) | |
1324 | apiserver_sync_callback(lsa, (void *)¶m, seqnum); | |
1325 | if (mask & Power2[OSPF_ASBR_SUMMARY_LSA]) | |
1326 | LSDB_LOOP(ASBR_SUMMARY_LSDB(area), rn, lsa) | |
1327 | apiserver_sync_callback(lsa, (void *)¶m, seqnum); | |
1328 | if (mask & Power2[OSPF_OPAQUE_LINK_LSA]) | |
1329 | LSDB_LOOP(OPAQUE_LINK_LSDB(area), rn, lsa) | |
1330 | apiserver_sync_callback(lsa, (void *)¶m, seqnum); | |
1331 | if (mask & Power2[OSPF_OPAQUE_AREA_LSA]) | |
1332 | LSDB_LOOP(OPAQUE_AREA_LSDB(area), rn, lsa) | |
1333 | apiserver_sync_callback(lsa, (void *)¶m, seqnum); | |
1334 | } | |
1335 | } | |
1336 | ||
1337 | /* For AS-external LSAs */ | |
1338 | if (ospf->lsdb) { | |
1339 | if (mask & Power2[OSPF_AS_EXTERNAL_LSA]) | |
1340 | LSDB_LOOP(EXTERNAL_LSDB(ospf), rn, lsa) | |
1341 | apiserver_sync_callback(lsa, (void *)¶m, seqnum); | |
1342 | } | |
1343 | ||
1344 | /* For AS-external opaque LSAs */ | |
1345 | if (ospf->lsdb) { | |
1346 | if (mask & Power2[OSPF_OPAQUE_AS_LSA]) | |
1347 | LSDB_LOOP(OPAQUE_AS_LSDB(ospf), rn, lsa) | |
1348 | apiserver_sync_callback(lsa, (void *)¶m, seqnum); | |
1349 | } | |
1350 | ||
1351 | /* Send a reply back to client with return code */ | |
1352 | rc = ospf_apiserver_send_reply(apiserv, seqnum, rc); | |
1353 | return rc; | |
2d33f157 | 1354 | } |
1355 | ||
1356 | ||
1357 | /* ----------------------------------------------------------- | |
1358 | * Followings are functions to originate or update LSA | |
1359 | * from an application. | |
1360 | * ----------------------------------------------------------- | |
1361 | */ | |
1362 | ||
1363 | /* Create a new internal opaque LSA by taking prototype and filling in | |
1364 | missing fields such as age, sequence number, advertising router, | |
1365 | checksum and so on. The interface parameter is used for type 9 | |
1366 | LSAs, area parameter for type 10. Type 11 LSAs do neither need area | |
1367 | nor interface. */ | |
1368 | ||
ac4d0be5 | 1369 | struct ospf_lsa *ospf_apiserver_opaque_lsa_new(struct ospf_area *area, |
1370 | struct ospf_interface *oi, | |
1371 | struct lsa_header *protolsa) | |
2d33f157 | 1372 | { |
ac4d0be5 | 1373 | struct stream *s; |
1374 | struct lsa_header *newlsa; | |
1375 | struct ospf_lsa *new = NULL; | |
1376 | u_char options = 0x0; | |
1377 | u_int16_t length; | |
1378 | ||
1379 | struct ospf *ospf; | |
1380 | ||
1381 | ospf = ospf_lookup(); | |
1382 | assert(ospf); | |
1383 | ||
1384 | /* Create a stream for internal opaque LSA */ | |
1385 | if ((s = stream_new(OSPF_MAX_LSA_SIZE)) == NULL) { | |
1386 | zlog_warn("ospf_apiserver_opaque_lsa_new: stream_new failed"); | |
1387 | return NULL; | |
1388 | } | |
1389 | ||
1390 | newlsa = (struct lsa_header *)STREAM_DATA(s); | |
1391 | ||
1392 | /* XXX If this is a link-local LSA or an AS-external LSA, how do we | |
1393 | have to set options? */ | |
1394 | ||
1395 | if (area) { | |
1396 | options = LSA_OPTIONS_GET(area); | |
1397 | options |= LSA_OPTIONS_NSSA_GET(area); | |
1398 | } | |
1399 | ||
1400 | options |= OSPF_OPTION_O; /* Don't forget to set option bit */ | |
1401 | ||
1402 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { | |
1403 | zlog_debug("LSA[Type%d:%s]: Creating an Opaque-LSA instance", | |
1404 | protolsa->type, inet_ntoa(protolsa->id)); | |
1405 | } | |
1406 | ||
1407 | /* Set opaque-LSA header fields. */ | |
1408 | lsa_header_set(s, options, protolsa->type, protolsa->id, | |
1409 | ospf->router_id); | |
1410 | ||
1411 | /* Set opaque-LSA body fields. */ | |
1412 | stream_put(s, ((u_char *)protolsa) + sizeof(struct lsa_header), | |
1413 | ntohs(protolsa->length) - sizeof(struct lsa_header)); | |
1414 | ||
1415 | /* Determine length of LSA. */ | |
1416 | length = stream_get_endp(s); | |
1417 | newlsa->length = htons(length); | |
1418 | ||
1419 | /* Create OSPF LSA. */ | |
1420 | if ((new = ospf_lsa_new()) == NULL) { | |
1421 | zlog_warn("ospf_apiserver_opaque_lsa_new: ospf_lsa_new() ?"); | |
1422 | stream_free(s); | |
1423 | return NULL; | |
1424 | } | |
1425 | ||
1426 | if ((new->data = ospf_lsa_data_new(length)) == NULL) { | |
1427 | zlog_warn( | |
1428 | "ospf_apiserver_opaque_lsa_new: ospf_lsa_data_new() ?"); | |
1429 | ospf_lsa_unlock(&new); | |
1430 | stream_free(s); | |
1431 | return NULL; | |
1432 | } | |
1433 | ||
1434 | new->area = area; | |
1435 | new->oi = oi; | |
1436 | ||
1437 | SET_FLAG(new->flags, OSPF_LSA_SELF); | |
1438 | memcpy(new->data, newlsa, length); | |
1439 | stream_free(s); | |
1440 | ||
1441 | return new; | |
2d33f157 | 1442 | } |
1443 | ||
1444 | ||
ac4d0be5 | 1445 | int ospf_apiserver_is_ready_type9(struct ospf_interface *oi) |
2d33f157 | 1446 | { |
ac4d0be5 | 1447 | /* Type 9 opaque LSA can be originated if there is at least one |
1448 | active opaque-capable neighbor attached to the outgoing | |
1449 | interface. */ | |
2d33f157 | 1450 | |
ac4d0be5 | 1451 | return (ospf_nbr_count_opaque_capable(oi) > 0); |
2d33f157 | 1452 | } |
1453 | ||
ac4d0be5 | 1454 | int ospf_apiserver_is_ready_type10(struct ospf_area *area) |
2d33f157 | 1455 | { |
ac4d0be5 | 1456 | /* Type 10 opaque LSA can be originated if there is at least one |
1457 | interface belonging to the area that has an active opaque-capable | |
1458 | neighbor. */ | |
1459 | struct listnode *node, *nnode; | |
1460 | struct ospf_interface *oi; | |
1461 | ||
1462 | for (ALL_LIST_ELEMENTS(area->oiflist, node, nnode, oi)) | |
1463 | /* Is there an active neighbor attached to this interface? */ | |
1464 | if (ospf_apiserver_is_ready_type9(oi)) | |
1465 | return 1; | |
1466 | ||
1467 | /* No active neighbor in area */ | |
1468 | return 0; | |
2d33f157 | 1469 | } |
1470 | ||
ac4d0be5 | 1471 | int ospf_apiserver_is_ready_type11(struct ospf *ospf) |
2d33f157 | 1472 | { |
ac4d0be5 | 1473 | /* Type 11 opaque LSA can be originated if there is at least one |
1474 | interface | |
1475 | that has an active opaque-capable neighbor. */ | |
1476 | struct listnode *node, *nnode; | |
1477 | struct ospf_interface *oi; | |
1478 | ||
1479 | for (ALL_LIST_ELEMENTS(ospf->oiflist, node, nnode, oi)) | |
1480 | /* Is there an active neighbor attached to this interface? */ | |
1481 | if (ospf_apiserver_is_ready_type9(oi)) | |
1482 | return 1; | |
1483 | ||
1484 | /* No active neighbor at all */ | |
1485 | return 0; | |
2d33f157 | 1486 | } |
1487 | ||
1488 | ||
ac4d0be5 | 1489 | int ospf_apiserver_handle_originate_request(struct ospf_apiserver *apiserv, |
1490 | struct msg *msg) | |
2d33f157 | 1491 | { |
ac4d0be5 | 1492 | struct msg_originate_request *omsg; |
1493 | struct lsa_header *data; | |
1494 | struct ospf_lsa *new; | |
1495 | struct ospf_lsa *old; | |
1496 | struct ospf_area *area = NULL; | |
1497 | struct ospf_interface *oi = NULL; | |
1498 | struct ospf_lsdb *lsdb = NULL; | |
1499 | struct ospf *ospf; | |
1500 | int lsa_type, opaque_type; | |
1501 | int ready = 0; | |
1502 | int rc = 0; | |
1503 | ||
1504 | ospf = ospf_lookup(); | |
1505 | ||
1506 | /* Extract opaque LSA data from message */ | |
1507 | omsg = (struct msg_originate_request *)STREAM_DATA(msg->s); | |
1508 | data = &omsg->data; | |
1509 | ||
1510 | /* Determine interface for type9 or area for type10 LSAs. */ | |
1511 | switch (data->type) { | |
1512 | case OSPF_OPAQUE_LINK_LSA: | |
1513 | oi = ospf_apiserver_if_lookup_by_addr(omsg->ifaddr); | |
1514 | if (!oi) { | |
1515 | zlog_warn("apiserver_originate: unknown interface %s", | |
1516 | inet_ntoa(omsg->ifaddr)); | |
1517 | rc = OSPF_API_NOSUCHINTERFACE; | |
1518 | goto out; | |
1519 | } | |
1520 | area = oi->area; | |
1521 | lsdb = area->lsdb; | |
1522 | break; | |
1523 | case OSPF_OPAQUE_AREA_LSA: | |
1524 | area = ospf_area_lookup_by_area_id(ospf, omsg->area_id); | |
1525 | if (!area) { | |
1526 | zlog_warn("apiserver_originate: unknown area %s", | |
1527 | inet_ntoa(omsg->area_id)); | |
1528 | rc = OSPF_API_NOSUCHAREA; | |
1529 | goto out; | |
1530 | } | |
1531 | lsdb = area->lsdb; | |
1532 | break; | |
1533 | case OSPF_OPAQUE_AS_LSA: | |
1534 | lsdb = ospf->lsdb; | |
1535 | break; | |
1536 | default: | |
1537 | /* We can only handle opaque types here */ | |
1538 | zlog_warn( | |
1539 | "apiserver_originate: Cannot originate non-opaque LSA type %d", | |
1540 | data->type); | |
1541 | rc = OSPF_API_ILLEGALLSATYPE; | |
1542 | goto out; | |
1543 | } | |
1544 | ||
1545 | /* Check if we registered this opaque type */ | |
1546 | lsa_type = data->type; | |
1547 | opaque_type = GET_OPAQUE_TYPE(ntohl(data->id.s_addr)); | |
1548 | ||
1549 | if (!apiserver_is_opaque_type_registered(apiserv, lsa_type, | |
1550 | opaque_type)) { | |
1551 | zlog_warn( | |
1552 | "apiserver_originate: LSA-type(%d)/Opaque-type(%d): Not registered", | |
1553 | lsa_type, opaque_type); | |
1554 | rc = OSPF_API_OPAQUETYPENOTREGISTERED; | |
1555 | goto out; | |
1556 | } | |
1557 | ||
1558 | /* Make sure that the neighbors are ready before we can originate */ | |
1559 | switch (data->type) { | |
1560 | case OSPF_OPAQUE_LINK_LSA: | |
1561 | ready = ospf_apiserver_is_ready_type9(oi); | |
1562 | break; | |
1563 | case OSPF_OPAQUE_AREA_LSA: | |
1564 | ready = ospf_apiserver_is_ready_type10(area); | |
1565 | break; | |
1566 | case OSPF_OPAQUE_AS_LSA: | |
1567 | ready = ospf_apiserver_is_ready_type11(ospf); | |
1568 | break; | |
1569 | default: | |
1570 | break; | |
1571 | } | |
1572 | ||
1573 | if (!ready) { | |
1574 | zlog_warn("Neighbors not ready to originate type %d", | |
1575 | data->type); | |
1576 | rc = OSPF_API_NOTREADY; | |
1577 | goto out; | |
1578 | } | |
1579 | ||
1580 | /* Create OSPF's internal opaque LSA representation */ | |
1581 | new = ospf_apiserver_opaque_lsa_new(area, oi, data); | |
1582 | if (!new) { | |
1583 | rc = OSPF_API_NOMEMORY; /* XXX */ | |
1584 | goto out; | |
1585 | } | |
1586 | ||
1587 | /* Determine if LSA is new or an update for an existing one. */ | |
1588 | old = ospf_lsdb_lookup(lsdb, new); | |
1589 | ||
1590 | if (!old) { | |
1591 | /* New LSA install in LSDB. */ | |
1592 | rc = ospf_apiserver_originate1(new); | |
1593 | } else { | |
1594 | /* | |
1595 | * Keep the new LSA instance in the "waiting place" until the | |
1596 | * next | |
1597 | * refresh timing. If several LSA update requests for the same | |
1598 | * LSID | |
1599 | * have issued by peer, the last one takes effect. | |
1600 | */ | |
1601 | new->lsdb = &apiserv->reserve; | |
1602 | ospf_lsdb_add(&apiserv->reserve, new); | |
1603 | ||
1604 | /* Kick the scheduler function. */ | |
1605 | ospf_opaque_lsa_refresh_schedule(old); | |
1606 | } | |
2d33f157 | 1607 | |
1608 | out: | |
1609 | ||
ac4d0be5 | 1610 | /* Send a reply back to client with return code */ |
1611 | rc = ospf_apiserver_send_reply(apiserv, ntohl(msg->hdr.msgseq), rc); | |
1612 | return rc; | |
2d33f157 | 1613 | } |
1614 | ||
1615 | ||
1616 | /* ----------------------------------------------------------- | |
ac4d0be5 | 1617 | * Flood an LSA within its flooding scope. |
2d33f157 | 1618 | * ----------------------------------------------------------- |
1619 | */ | |
1620 | ||
1621 | /* XXX We can probably use ospf_flood_through instead of this function | |
ac4d0be5 | 1622 | but then we need the neighbor parameter. If we set nbr to |
2d33f157 | 1623 | NULL then ospf_flood_through crashes due to dereferencing NULL. */ |
1624 | ||
ac4d0be5 | 1625 | void ospf_apiserver_flood_opaque_lsa(struct ospf_lsa *lsa) |
2d33f157 | 1626 | { |
ac4d0be5 | 1627 | assert(lsa); |
1628 | ||
1629 | switch (lsa->data->type) { | |
1630 | case OSPF_OPAQUE_LINK_LSA: | |
1631 | /* Increment counters? XXX */ | |
1632 | ||
1633 | /* Flood LSA through local network. */ | |
1634 | ospf_flood_through_area(lsa->area, NULL /*nbr */, lsa); | |
1635 | break; | |
1636 | case OSPF_OPAQUE_AREA_LSA: | |
1637 | /* Update LSA origination count. */ | |
1638 | assert(lsa->area); | |
1639 | lsa->area->ospf->lsa_originate_count++; | |
1640 | ||
1641 | /* Flood LSA through area. */ | |
1642 | ospf_flood_through_area(lsa->area, NULL /*nbr */, lsa); | |
1643 | break; | |
1644 | case OSPF_OPAQUE_AS_LSA: { | |
1645 | struct ospf *ospf; | |
1646 | ||
1647 | ospf = ospf_lookup(); | |
1648 | assert(ospf); | |
1649 | ||
1650 | /* Increment counters? XXX */ | |
1651 | ||
1652 | /* Flood LSA through AS. */ | |
1653 | ospf_flood_through_as(ospf, NULL /*nbr */, lsa); | |
1654 | break; | |
1655 | } | |
1656 | } | |
2d33f157 | 1657 | } |
1658 | ||
ac4d0be5 | 1659 | int ospf_apiserver_originate1(struct ospf_lsa *lsa) |
2d33f157 | 1660 | { |
ac4d0be5 | 1661 | struct ospf *ospf; |
99b7c5d6 | 1662 | |
ac4d0be5 | 1663 | ospf = ospf_lookup(); |
1664 | assert(ospf); | |
99b7c5d6 | 1665 | |
ac4d0be5 | 1666 | /* Install this LSA into LSDB. */ |
1667 | if (ospf_lsa_install(ospf, lsa->oi, lsa) == NULL) { | |
1668 | zlog_warn("ospf_apiserver_originate1: ospf_lsa_install failed"); | |
1669 | return -1; | |
1670 | } | |
2d33f157 | 1671 | |
ac4d0be5 | 1672 | /* Flood LSA within scope */ |
2d33f157 | 1673 | |
1674 | #ifdef NOTYET | |
ac4d0be5 | 1675 | /* |
1676 | * NB: Modified version of "ospf_flood_though ()" accepts NULL "inbr" | |
1677 | * parameter, and thus it does not cause SIGSEGV error. | |
1678 | */ | |
1679 | ospf_flood_through(NULL /*nbr */, lsa); | |
1680 | #else /* NOTYET */ | |
1681 | ||
1682 | ospf_apiserver_flood_opaque_lsa(lsa); | |
2d33f157 | 1683 | #endif /* NOTYET */ |
1684 | ||
ac4d0be5 | 1685 | return 0; |
2d33f157 | 1686 | } |
1687 | ||
1688 | ||
1689 | /* Opaque LSAs of type 9 on a specific interface can now be | |
1690 | originated. Tell clients that registered type 9. */ | |
ac4d0be5 | 1691 | int ospf_apiserver_lsa9_originator(void *arg) |
2d33f157 | 1692 | { |
ac4d0be5 | 1693 | struct ospf_interface *oi; |
2d33f157 | 1694 | |
ac4d0be5 | 1695 | oi = (struct ospf_interface *)arg; |
1696 | if (listcount(apiserver_list) > 0) { | |
1697 | ospf_apiserver_clients_notify_ready_type9(oi); | |
1698 | } | |
1699 | return 0; | |
2d33f157 | 1700 | } |
1701 | ||
ac4d0be5 | 1702 | int ospf_apiserver_lsa10_originator(void *arg) |
2d33f157 | 1703 | { |
ac4d0be5 | 1704 | struct ospf_area *area; |
2d33f157 | 1705 | |
ac4d0be5 | 1706 | area = (struct ospf_area *)arg; |
1707 | if (listcount(apiserver_list) > 0) { | |
1708 | ospf_apiserver_clients_notify_ready_type10(area); | |
1709 | } | |
1710 | return 0; | |
2d33f157 | 1711 | } |
1712 | ||
ac4d0be5 | 1713 | int ospf_apiserver_lsa11_originator(void *arg) |
2d33f157 | 1714 | { |
ac4d0be5 | 1715 | struct ospf *ospf; |
2d33f157 | 1716 | |
ac4d0be5 | 1717 | ospf = (struct ospf *)arg; |
1718 | if (listcount(apiserver_list) > 0) { | |
1719 | ospf_apiserver_clients_notify_ready_type11(ospf); | |
1720 | } | |
1721 | return 0; | |
2d33f157 | 1722 | } |
1723 | ||
1724 | ||
1725 | /* Periodically refresh opaque LSAs so that they do not expire in | |
1726 | other routers. */ | |
ac4d0be5 | 1727 | struct ospf_lsa *ospf_apiserver_lsa_refresher(struct ospf_lsa *lsa) |
2d33f157 | 1728 | { |
ac4d0be5 | 1729 | struct ospf_apiserver *apiserv; |
1730 | struct ospf_lsa *new = NULL; | |
1731 | struct ospf *ospf; | |
1732 | ||
1733 | ospf = ospf_lookup(); | |
1734 | assert(ospf); | |
1735 | ||
1736 | apiserv = lookup_apiserver_by_lsa(lsa); | |
1737 | if (!apiserv) { | |
1738 | zlog_warn( | |
1739 | "ospf_apiserver_lsa_refresher: LSA[%s]: No apiserver?", | |
1740 | dump_lsa_key(lsa)); | |
1741 | lsa->data->ls_age = | |
1742 | htons(OSPF_LSA_MAXAGE); /* Flush it anyway. */ | |
1743 | } | |
1744 | ||
1745 | if (IS_LSA_MAXAGE(lsa)) { | |
1746 | ospf_opaque_lsa_flush_schedule(lsa); | |
1747 | goto out; | |
1748 | } | |
1749 | ||
1750 | /* Check if updated version of LSA instance has already prepared. */ | |
1751 | new = ospf_lsdb_lookup(&apiserv->reserve, lsa); | |
1752 | if (!new) { | |
1753 | /* This is a periodic refresh, driven by core OSPF mechanism. */ | |
1754 | new = ospf_apiserver_opaque_lsa_new(lsa->area, lsa->oi, | |
1755 | lsa->data); | |
1756 | if (!new) { | |
1757 | zlog_warn( | |
1758 | "ospf_apiserver_lsa_refresher: Cannot create a new LSA?"); | |
1759 | goto out; | |
1760 | } | |
1761 | } else { | |
1762 | /* This is a forcible refresh, requested by OSPF-API client. */ | |
1763 | ospf_lsdb_delete(&apiserv->reserve, new); | |
1764 | new->lsdb = NULL; | |
1765 | } | |
1766 | ||
1767 | /* Increment sequence number */ | |
1768 | new->data->ls_seqnum = lsa_seqnum_increment(lsa); | |
1769 | ||
1770 | /* New LSA is in same area. */ | |
1771 | new->area = lsa->area; | |
1772 | SET_FLAG(new->flags, OSPF_LSA_SELF); | |
1773 | ||
1774 | /* Install LSA into LSDB. */ | |
1775 | if (ospf_lsa_install(ospf, new->oi, new) == NULL) { | |
1776 | zlog_warn( | |
1777 | "ospf_apiserver_lsa_refresher: ospf_lsa_install failed"); | |
1778 | ospf_lsa_unlock(&new); | |
1779 | goto out; | |
1780 | } | |
1781 | ||
1782 | /* Flood updated LSA through interface, area or AS */ | |
2d33f157 | 1783 | |
1784 | #ifdef NOTYET | |
ac4d0be5 | 1785 | ospf_flood_through(NULL /*nbr */, new); |
2d33f157 | 1786 | #endif /* NOTYET */ |
ac4d0be5 | 1787 | ospf_apiserver_flood_opaque_lsa(new); |
2d33f157 | 1788 | |
ac4d0be5 | 1789 | /* Debug logging. */ |
1790 | if (IS_DEBUG_OSPF(lsa, LSA_GENERATE)) { | |
1791 | zlog_debug("LSA[Type%d:%s]: Refresh Opaque LSA", | |
1792 | new->data->type, inet_ntoa(new->data->id)); | |
1793 | ospf_lsa_header_dump(new->data); | |
1794 | } | |
2d33f157 | 1795 | |
1796 | out: | |
ac4d0be5 | 1797 | return new; |
2d33f157 | 1798 | } |
1799 | ||
1800 | ||
1801 | /* ----------------------------------------------------------- | |
1802 | * Followings are functions to delete LSAs | |
1803 | * ----------------------------------------------------------- | |
1804 | */ | |
1805 | ||
ac4d0be5 | 1806 | int ospf_apiserver_handle_delete_request(struct ospf_apiserver *apiserv, |
1807 | struct msg *msg) | |
2d33f157 | 1808 | { |
ac4d0be5 | 1809 | struct msg_delete_request *dmsg; |
1810 | struct ospf_lsa *old; | |
1811 | struct ospf_area *area = NULL; | |
1812 | struct in_addr id; | |
1813 | int lsa_type, opaque_type; | |
1814 | int rc = 0; | |
1815 | struct ospf *ospf; | |
1816 | ||
1817 | ospf = ospf_lookup(); | |
1818 | assert(ospf); | |
1819 | ||
1820 | /* Extract opaque LSA from message */ | |
1821 | dmsg = (struct msg_delete_request *)STREAM_DATA(msg->s); | |
1822 | ||
1823 | /* Lookup area for link-local and area-local opaque LSAs */ | |
1824 | switch (dmsg->lsa_type) { | |
1825 | case OSPF_OPAQUE_LINK_LSA: | |
1826 | case OSPF_OPAQUE_AREA_LSA: | |
1827 | area = ospf_area_lookup_by_area_id(ospf, dmsg->area_id); | |
1828 | if (!area) { | |
1829 | zlog_warn("ospf_apiserver_lsa_delete: unknown area %s", | |
1830 | inet_ntoa(dmsg->area_id)); | |
1831 | rc = OSPF_API_NOSUCHAREA; | |
1832 | goto out; | |
1833 | } | |
1834 | break; | |
1835 | case OSPF_OPAQUE_AS_LSA: | |
1836 | /* AS-external opaque LSAs have no designated area */ | |
1837 | area = NULL; | |
1838 | break; | |
1839 | default: | |
1840 | zlog_warn( | |
1841 | "ospf_apiserver_lsa_delete: Cannot delete non-opaque LSA type %d", | |
1842 | dmsg->lsa_type); | |
1843 | rc = OSPF_API_ILLEGALLSATYPE; | |
1844 | goto out; | |
1845 | } | |
1846 | ||
1847 | /* Check if we registered this opaque type */ | |
1848 | lsa_type = dmsg->lsa_type; | |
1849 | opaque_type = dmsg->opaque_type; | |
1850 | ||
1851 | if (!apiserver_is_opaque_type_registered(apiserv, lsa_type, | |
1852 | opaque_type)) { | |
1853 | zlog_warn( | |
1854 | "ospf_apiserver_lsa_delete: LSA-type(%d)/Opaque-type(%d): Not registered", | |
1855 | lsa_type, opaque_type); | |
1856 | rc = OSPF_API_OPAQUETYPENOTREGISTERED; | |
1857 | goto out; | |
1858 | } | |
1859 | ||
1860 | /* opaque_id is in network byte order */ | |
1861 | id.s_addr = htonl( | |
1862 | SET_OPAQUE_LSID(dmsg->opaque_type, ntohl(dmsg->opaque_id))); | |
1863 | ||
1864 | /* | |
1865 | * Even if the target LSA has once scheduled to flush, it remains in | |
1866 | * the LSDB until it is finally handled by the maxage remover thread. | |
1867 | * Therefore, the lookup function below may return non-NULL result. | |
1868 | */ | |
1869 | old = ospf_lsa_lookup(area, dmsg->lsa_type, id, ospf->router_id); | |
1870 | if (!old) { | |
1871 | zlog_warn( | |
1872 | "ospf_apiserver_lsa_delete: LSA[Type%d:%s] not in LSDB", | |
1873 | dmsg->lsa_type, inet_ntoa(id)); | |
1874 | rc = OSPF_API_NOSUCHLSA; | |
1875 | goto out; | |
1876 | } | |
1877 | ||
1878 | /* Schedule flushing of LSA from LSDB */ | |
1879 | /* NB: Multiple scheduling will produce a warning message, but harmless. | |
1880 | */ | |
1881 | ospf_opaque_lsa_flush_schedule(old); | |
2d33f157 | 1882 | |
1883 | out: | |
1884 | ||
ac4d0be5 | 1885 | /* Send reply back to client including return code */ |
1886 | rc = ospf_apiserver_send_reply(apiserv, ntohl(msg->hdr.msgseq), rc); | |
1887 | return rc; | |
2d33f157 | 1888 | } |
1889 | ||
1890 | /* Flush self-originated opaque LSA */ | |
ac4d0be5 | 1891 | static int apiserver_flush_opaque_type_callback(struct ospf_lsa *lsa, |
1892 | void *p_arg, int int_arg) | |
2d33f157 | 1893 | { |
ac4d0be5 | 1894 | struct param_t { |
1895 | struct ospf_apiserver *apiserv; | |
1896 | u_char lsa_type; | |
1897 | u_char opaque_type; | |
1898 | } * param; | |
1899 | ||
1900 | /* Sanity check */ | |
1901 | assert(lsa->data); | |
1902 | assert(p_arg); | |
1903 | param = (struct param_t *)p_arg; | |
1904 | ||
1905 | /* If LSA matches type and opaque type then delete it */ | |
1906 | if (IS_LSA_SELF(lsa) && lsa->data->type == param->lsa_type | |
1907 | && GET_OPAQUE_TYPE(ntohl(lsa->data->id.s_addr)) | |
1908 | == param->opaque_type) { | |
1909 | ospf_opaque_lsa_flush_schedule(lsa); | |
1910 | } | |
1911 | return 0; | |
2d33f157 | 1912 | } |
1913 | ||
1914 | /* Delete self-originated opaque LSAs of a given opaque type. This | |
1915 | function is called when an application unregisters a given opaque | |
1916 | type or a connection to an application closes and all those opaque | |
1917 | LSAs need to be flushed the LSDB. */ | |
ac4d0be5 | 1918 | void ospf_apiserver_flush_opaque_lsa(struct ospf_apiserver *apiserv, |
1919 | u_char lsa_type, u_char opaque_type) | |
2d33f157 | 1920 | { |
ac4d0be5 | 1921 | struct param_t { |
1922 | struct ospf_apiserver *apiserv; | |
1923 | u_char lsa_type; | |
1924 | u_char opaque_type; | |
1925 | } param; | |
1926 | struct listnode *node, *nnode; | |
1927 | struct ospf *ospf; | |
1928 | struct ospf_area *area; | |
1929 | ||
1930 | ospf = ospf_lookup(); | |
1931 | assert(ospf); | |
1932 | ||
1933 | /* Set parameter struct. */ | |
1934 | param.apiserv = apiserv; | |
1935 | param.lsa_type = lsa_type; | |
1936 | param.opaque_type = opaque_type; | |
1937 | ||
1938 | switch (lsa_type) { | |
1939 | struct route_node *rn; | |
1940 | struct ospf_lsa *lsa; | |
1941 | ||
1942 | case OSPF_OPAQUE_LINK_LSA: | |
1943 | for (ALL_LIST_ELEMENTS(ospf->areas, node, nnode, area)) | |
1944 | LSDB_LOOP(OPAQUE_LINK_LSDB(area), rn, lsa) | |
1945 | apiserver_flush_opaque_type_callback(lsa, (void *)¶m, 0); | |
1946 | break; | |
1947 | case OSPF_OPAQUE_AREA_LSA: | |
1948 | for (ALL_LIST_ELEMENTS(ospf->areas, node, nnode, area)) | |
1949 | LSDB_LOOP(OPAQUE_AREA_LSDB(area), rn, lsa) | |
1950 | apiserver_flush_opaque_type_callback(lsa, (void *)¶m, 0); | |
1951 | break; | |
1952 | case OSPF_OPAQUE_AS_LSA: | |
1953 | LSDB_LOOP(OPAQUE_LINK_LSDB(ospf), rn, lsa) | |
1954 | apiserver_flush_opaque_type_callback(lsa, (void *)¶m, 0); | |
1955 | break; | |
1956 | default: | |
1957 | break; | |
1958 | } | |
1959 | return; | |
2d33f157 | 1960 | } |
1961 | ||
1962 | ||
1963 | /* ----------------------------------------------------------- | |
ac4d0be5 | 1964 | * Followings are callback functions to handle opaque types |
2d33f157 | 1965 | * ----------------------------------------------------------- |
1966 | */ | |
1967 | ||
ac4d0be5 | 1968 | int ospf_apiserver_new_if(struct interface *ifp) |
2d33f157 | 1969 | { |
ac4d0be5 | 1970 | struct ospf_interface *oi; |
1971 | ||
1972 | /* For some strange reason it seems possible that we are invoked | |
1973 | with an interface that has no name. This seems to happen during | |
1974 | initialization. Return if this happens */ | |
1975 | ||
1976 | if (ifp->name[0] == '\0') { | |
1977 | /* interface has empty name */ | |
1978 | zlog_warn("ospf_apiserver_new_if: interface has no name?"); | |
1979 | return 0; | |
1980 | } | |
1981 | ||
1982 | /* zlog_warn for debugging */ | |
1983 | zlog_warn("ospf_apiserver_new_if"); | |
1984 | zlog_warn("ifp name=%s status=%d index=%d", ifp->name, ifp->status, | |
1985 | ifp->ifindex); | |
1986 | ||
1987 | if (ifp->name[0] == '\0') { | |
1988 | /* interface has empty name */ | |
1989 | zlog_warn("ospf_apiserver_new_if: interface has no name?"); | |
1990 | return 0; | |
1991 | } | |
1992 | ||
1993 | oi = ospf_apiserver_if_lookup_by_ifp(ifp); | |
1994 | ||
1995 | if (!oi) { | |
1996 | /* This interface is known to Zebra but not to OSPF daemon yet. | |
1997 | */ | |
1998 | zlog_warn( | |
1999 | "ospf_apiserver_new_if: interface %s not known to OSPFd?", | |
2000 | ifp->name); | |
2001 | return 0; | |
2002 | } | |
2003 | ||
2004 | assert(oi); | |
2005 | ||
2006 | /* New interface added to OSPF, tell clients about it */ | |
2007 | if (listcount(apiserver_list) > 0) { | |
2008 | ospf_apiserver_clients_notify_new_if(oi); | |
2009 | } | |
2010 | return 0; | |
2d33f157 | 2011 | } |
2012 | ||
ac4d0be5 | 2013 | int ospf_apiserver_del_if(struct interface *ifp) |
2d33f157 | 2014 | { |
ac4d0be5 | 2015 | struct ospf_interface *oi; |
2016 | ||
2017 | /* zlog_warn for debugging */ | |
2018 | zlog_warn("ospf_apiserver_del_if"); | |
2019 | zlog_warn("ifp name=%s status=%d index=%d\n", ifp->name, ifp->status, | |
2020 | ifp->ifindex); | |
2021 | ||
2022 | oi = ospf_apiserver_if_lookup_by_ifp(ifp); | |
2023 | ||
2024 | if (!oi) { | |
2025 | /* This interface is known to Zebra but not to OSPF daemon | |
2026 | anymore. No need to tell clients about it */ | |
2027 | return 0; | |
2028 | } | |
2029 | ||
2030 | /* Interface deleted, tell clients about it */ | |
2031 | if (listcount(apiserver_list) > 0) { | |
2032 | ospf_apiserver_clients_notify_del_if(oi); | |
2033 | } | |
2034 | return 0; | |
2d33f157 | 2035 | } |
2036 | ||
ac4d0be5 | 2037 | void ospf_apiserver_ism_change(struct ospf_interface *oi, int old_state) |
2d33f157 | 2038 | { |
ac4d0be5 | 2039 | /* Tell clients about interface change */ |
2d33f157 | 2040 | |
ac4d0be5 | 2041 | /* zlog_warn for debugging */ |
2042 | zlog_warn("ospf_apiserver_ism_change"); | |
2043 | if (listcount(apiserver_list) > 0) { | |
2044 | ospf_apiserver_clients_notify_ism_change(oi); | |
2045 | } | |
2d33f157 | 2046 | |
ac4d0be5 | 2047 | zlog_warn("oi->ifp->name=%s", oi->ifp->name); |
2048 | zlog_warn("old_state=%d", old_state); | |
2049 | zlog_warn("oi->state=%d", oi->state); | |
2d33f157 | 2050 | } |
2051 | ||
ac4d0be5 | 2052 | void ospf_apiserver_nsm_change(struct ospf_neighbor *nbr, int old_status) |
2d33f157 | 2053 | { |
ac4d0be5 | 2054 | /* Neighbor status changed, tell clients about it */ |
2055 | zlog_warn("ospf_apiserver_nsm_change"); | |
2056 | if (listcount(apiserver_list) > 0) { | |
2057 | ospf_apiserver_clients_notify_nsm_change(nbr); | |
2058 | } | |
2d33f157 | 2059 | } |
2060 | ||
ac4d0be5 | 2061 | void ospf_apiserver_show_info(struct vty *vty, struct ospf_lsa *lsa) |
2d33f157 | 2062 | { |
ac4d0be5 | 2063 | struct opaque_lsa { |
2064 | struct lsa_header header; | |
2065 | u_char data[1]; /* opaque data have variable length. This is | |
2066 | start | |
2067 | address */ | |
2068 | }; | |
2069 | struct opaque_lsa *olsa; | |
2070 | int opaquelen; | |
2071 | ||
2072 | olsa = (struct opaque_lsa *)lsa->data; | |
2073 | ||
2074 | if (VALID_OPAQUE_INFO_LEN(lsa->data)) | |
2075 | opaquelen = ntohs(lsa->data->length) - OSPF_LSA_HEADER_SIZE; | |
2076 | else | |
2077 | opaquelen = 0; | |
2078 | ||
2079 | /* Output information about opaque LSAs */ | |
2080 | if (vty != NULL) { | |
2081 | int i; | |
2082 | vty_out(vty, | |
2083 | " Added using OSPF API: %u octets of opaque data %s%s", | |
2084 | opaquelen, | |
2085 | VALID_OPAQUE_INFO_LEN(lsa->data) ? "" | |
2086 | : "(Invalid length?)", | |
2087 | VTY_NEWLINE); | |
2088 | vty_out(vty, " Opaque data: "); | |
2089 | ||
2090 | for (i = 0; i < opaquelen; i++) { | |
2091 | vty_out(vty, "0x%x ", olsa->data[i]); | |
2092 | } | |
2093 | vty_out(vty, "%s", VTY_NEWLINE); | |
2094 | } else { | |
2095 | int i; | |
2096 | zlog_debug( | |
2097 | " Added using OSPF API: %u octets of opaque data %s", | |
2098 | opaquelen, | |
2099 | VALID_OPAQUE_INFO_LEN(lsa->data) ? "" | |
2100 | : "(Invalid length?)"); | |
2101 | zlog_debug(" Opaque data: "); | |
2102 | ||
2103 | for (i = 0; i < opaquelen; i++) { | |
2104 | zlog_debug("0x%x ", olsa->data[i]); | |
2105 | } | |
2106 | zlog_debug("\n"); | |
2107 | } | |
2108 | return; | |
2d33f157 | 2109 | } |
2110 | ||
2111 | /* ----------------------------------------------------------- | |
2112 | * Followings are functions to notify clients about events | |
2113 | * ----------------------------------------------------------- | |
2114 | */ | |
2115 | ||
2116 | /* Send a message to all clients. This is useful for messages | |
2117 | that need to be notified to all clients (such as interface | |
2118 | changes) */ | |
2119 | ||
ac4d0be5 | 2120 | void ospf_apiserver_clients_notify_all(struct msg *msg) |
2d33f157 | 2121 | { |
ac4d0be5 | 2122 | struct listnode *node, *nnode; |
2123 | struct ospf_apiserver *apiserv; | |
2d33f157 | 2124 | |
ac4d0be5 | 2125 | /* Send message to all clients */ |
2126 | for (ALL_LIST_ELEMENTS(apiserver_list, node, nnode, apiserv)) | |
2127 | ospf_apiserver_send_msg(apiserv, msg); | |
2d33f157 | 2128 | } |
2129 | ||
2130 | /* An interface is now ready to accept opaque LSAs. Notify all | |
2131 | clients that registered to use this opaque type */ | |
ac4d0be5 | 2132 | void ospf_apiserver_clients_notify_ready_type9(struct ospf_interface *oi) |
2d33f157 | 2133 | { |
ac4d0be5 | 2134 | struct listnode *node, *nnode; |
2135 | struct msg *msg; | |
2136 | struct ospf_apiserver *apiserv; | |
2137 | ||
2138 | assert(oi); | |
2139 | if (!oi->address) { | |
2140 | zlog_warn("Interface has no address?"); | |
2141 | return; | |
2142 | } | |
2143 | ||
2144 | if (!ospf_apiserver_is_ready_type9(oi)) { | |
2145 | zlog_warn("Interface not ready for type 9?"); | |
2146 | return; | |
2147 | } | |
2148 | ||
2149 | for (ALL_LIST_ELEMENTS(apiserver_list, node, nnode, apiserv)) { | |
2150 | struct listnode *node2, *nnode2; | |
2151 | struct registered_opaque_type *r; | |
2152 | ||
2153 | for (ALL_LIST_ELEMENTS(apiserv->opaque_types, node2, nnode2, | |
2154 | r)) { | |
2155 | if (r->lsa_type == OSPF_OPAQUE_LINK_LSA) { | |
2156 | msg = new_msg_ready_notify( | |
2157 | 0, OSPF_OPAQUE_LINK_LSA, r->opaque_type, | |
2158 | oi->address->u.prefix4); | |
2159 | if (!msg) { | |
2160 | zlog_warn( | |
2161 | "ospf_apiserver_clients_notify_ready_type9: new_msg_ready_notify failed"); | |
2d33f157 | 2162 | #ifdef NOTYET |
ac4d0be5 | 2163 | /* Cannot allocate new message. What |
2164 | * should we do? */ | |
2165 | ospf_apiserver_free(apiserv); | |
2d33f157 | 2166 | #endif |
ac4d0be5 | 2167 | goto out; |
2168 | } | |
2d33f157 | 2169 | |
ac4d0be5 | 2170 | ospf_apiserver_send_msg(apiserv, msg); |
2171 | msg_free(msg); | |
2172 | } | |
2173 | } | |
2d33f157 | 2174 | } |
2d33f157 | 2175 | |
2176 | out: | |
ac4d0be5 | 2177 | return; |
2d33f157 | 2178 | } |
2179 | ||
ac4d0be5 | 2180 | void ospf_apiserver_clients_notify_ready_type10(struct ospf_area *area) |
2d33f157 | 2181 | { |
ac4d0be5 | 2182 | struct listnode *node, *nnode; |
2183 | struct msg *msg; | |
2184 | struct ospf_apiserver *apiserv; | |
2185 | ||
2186 | assert(area); | |
2187 | ||
2188 | if (!ospf_apiserver_is_ready_type10(area)) { | |
2189 | zlog_warn("Area not ready for type 10?"); | |
2190 | return; | |
2191 | } | |
2192 | ||
2193 | for (ALL_LIST_ELEMENTS(apiserver_list, node, nnode, apiserv)) { | |
2194 | struct listnode *node2, *nnode2; | |
2195 | struct registered_opaque_type *r; | |
2196 | ||
2197 | for (ALL_LIST_ELEMENTS(apiserv->opaque_types, node2, nnode2, | |
2198 | r)) { | |
2199 | if (r->lsa_type == OSPF_OPAQUE_AREA_LSA) { | |
2200 | msg = new_msg_ready_notify( | |
2201 | 0, OSPF_OPAQUE_AREA_LSA, r->opaque_type, | |
2202 | area->area_id); | |
2203 | if (!msg) { | |
2204 | zlog_warn( | |
2205 | "ospf_apiserver_clients_notify_ready_type10: new_msg_ready_nofity failed"); | |
2d33f157 | 2206 | #ifdef NOTYET |
ac4d0be5 | 2207 | /* Cannot allocate new message. What |
2208 | * should we do? */ | |
2209 | ospf_apiserver_free(apiserv); | |
2d33f157 | 2210 | #endif |
ac4d0be5 | 2211 | goto out; |
2212 | } | |
2d33f157 | 2213 | |
ac4d0be5 | 2214 | ospf_apiserver_send_msg(apiserv, msg); |
2215 | msg_free(msg); | |
2216 | } | |
2217 | } | |
2d33f157 | 2218 | } |
2d33f157 | 2219 | |
2220 | out: | |
ac4d0be5 | 2221 | return; |
2d33f157 | 2222 | } |
2223 | ||
2224 | ||
ac4d0be5 | 2225 | void ospf_apiserver_clients_notify_ready_type11(struct ospf *top) |
2d33f157 | 2226 | { |
ac4d0be5 | 2227 | struct listnode *node, *nnode; |
2228 | struct msg *msg; | |
2229 | struct in_addr id_null = {.s_addr = 0L}; | |
2230 | struct ospf_apiserver *apiserv; | |
2231 | ||
2232 | assert(top); | |
2233 | ||
2234 | if (!ospf_apiserver_is_ready_type11(top)) { | |
2235 | zlog_warn("AS not ready for type 11?"); | |
2236 | return; | |
2237 | } | |
2238 | ||
2239 | for (ALL_LIST_ELEMENTS(apiserver_list, node, nnode, apiserv)) { | |
2240 | struct listnode *node2, *nnode2; | |
2241 | struct registered_opaque_type *r; | |
2242 | ||
2243 | for (ALL_LIST_ELEMENTS(apiserv->opaque_types, node2, nnode2, | |
2244 | r)) { | |
2245 | if (r->lsa_type == OSPF_OPAQUE_AS_LSA) { | |
2246 | msg = new_msg_ready_notify( | |
2247 | 0, OSPF_OPAQUE_AS_LSA, r->opaque_type, | |
2248 | id_null); | |
2249 | if (!msg) { | |
2250 | zlog_warn( | |
2251 | "ospf_apiserver_clients_notify_ready_type11: new_msg_ready_notify failed"); | |
2d33f157 | 2252 | #ifdef NOTYET |
ac4d0be5 | 2253 | /* Cannot allocate new message. What |
2254 | * should we do? */ | |
2255 | ospf_apiserver_free(apiserv); | |
2d33f157 | 2256 | #endif |
ac4d0be5 | 2257 | goto out; |
2258 | } | |
2d33f157 | 2259 | |
ac4d0be5 | 2260 | ospf_apiserver_send_msg(apiserv, msg); |
2261 | msg_free(msg); | |
2262 | } | |
2263 | } | |
2d33f157 | 2264 | } |
2d33f157 | 2265 | |
2266 | out: | |
ac4d0be5 | 2267 | return; |
2d33f157 | 2268 | } |
2269 | ||
ac4d0be5 | 2270 | void ospf_apiserver_clients_notify_new_if(struct ospf_interface *oi) |
2d33f157 | 2271 | { |
ac4d0be5 | 2272 | struct msg *msg; |
2273 | ||
2274 | msg = new_msg_new_if(0, oi->address->u.prefix4, oi->area->area_id); | |
2275 | if (msg != NULL) { | |
2276 | ospf_apiserver_clients_notify_all(msg); | |
2277 | msg_free(msg); | |
2278 | } | |
2d33f157 | 2279 | } |
2280 | ||
ac4d0be5 | 2281 | void ospf_apiserver_clients_notify_del_if(struct ospf_interface *oi) |
2d33f157 | 2282 | { |
ac4d0be5 | 2283 | struct msg *msg; |
2284 | ||
2285 | msg = new_msg_del_if(0, oi->address->u.prefix4); | |
2286 | if (msg != NULL) { | |
2287 | ospf_apiserver_clients_notify_all(msg); | |
2288 | msg_free(msg); | |
2289 | } | |
2d33f157 | 2290 | } |
2291 | ||
ac4d0be5 | 2292 | void ospf_apiserver_clients_notify_ism_change(struct ospf_interface *oi) |
2d33f157 | 2293 | { |
ac4d0be5 | 2294 | struct msg *msg; |
2295 | struct in_addr ifaddr = {.s_addr = 0L}; | |
2296 | struct in_addr area_id = {.s_addr = 0L}; | |
2297 | ||
2298 | assert(oi); | |
2299 | assert(oi->ifp); | |
2300 | ||
2301 | if (oi->address) { | |
2302 | ifaddr = oi->address->u.prefix4; | |
2303 | } | |
2304 | if (oi->area) { | |
2305 | area_id = oi->area->area_id; | |
2306 | } | |
2307 | ||
2308 | msg = new_msg_ism_change(0, ifaddr, area_id, oi->state); | |
2309 | if (!msg) { | |
2310 | zlog_warn( | |
2311 | "apiserver_clients_notify_ism_change: msg_new failed"); | |
2312 | return; | |
2313 | } | |
2314 | ||
2315 | ospf_apiserver_clients_notify_all(msg); | |
2316 | msg_free(msg); | |
2d33f157 | 2317 | } |
2318 | ||
ac4d0be5 | 2319 | void ospf_apiserver_clients_notify_nsm_change(struct ospf_neighbor *nbr) |
2d33f157 | 2320 | { |
ac4d0be5 | 2321 | struct msg *msg; |
2322 | struct in_addr ifaddr = {.s_addr = 0L}; | |
2323 | struct in_addr nbraddr = {.s_addr = 0L}; | |
2d33f157 | 2324 | |
ac4d0be5 | 2325 | assert(nbr); |
2d33f157 | 2326 | |
ac4d0be5 | 2327 | if (nbr->oi) { |
2328 | ifaddr = nbr->oi->address->u.prefix4; | |
2329 | } | |
2d33f157 | 2330 | |
ac4d0be5 | 2331 | nbraddr = nbr->address.u.prefix4; |
2d33f157 | 2332 | |
ac4d0be5 | 2333 | msg = new_msg_nsm_change(0, ifaddr, nbraddr, nbr->router_id, |
2334 | nbr->state); | |
2335 | if (!msg) { | |
2336 | zlog_warn( | |
2337 | "apiserver_clients_notify_nsm_change: msg_new failed"); | |
2338 | return; | |
2339 | } | |
2d33f157 | 2340 | |
ac4d0be5 | 2341 | ospf_apiserver_clients_notify_all(msg); |
2342 | msg_free(msg); | |
2d33f157 | 2343 | } |
2344 | ||
ac4d0be5 | 2345 | static void apiserver_clients_lsa_change_notify(u_char msgtype, |
2346 | struct ospf_lsa *lsa) | |
2d33f157 | 2347 | { |
ac4d0be5 | 2348 | struct msg *msg; |
2349 | struct listnode *node, *nnode; | |
2350 | struct ospf_apiserver *apiserv; | |
2351 | ||
2352 | /* Default area for AS-External and Opaque11 LSAs */ | |
2353 | struct in_addr area_id = {.s_addr = 0L}; | |
2354 | ||
2355 | /* Default interface for non Opaque9 LSAs */ | |
2356 | struct in_addr ifaddr = {.s_addr = 0L}; | |
2357 | ||
2358 | if (lsa->area) { | |
2359 | area_id = lsa->area->area_id; | |
2360 | } | |
2361 | if (lsa->data->type == OSPF_OPAQUE_LINK_LSA) { | |
2362 | assert(lsa->oi); | |
2363 | ifaddr = lsa->oi->address->u.prefix4; | |
2364 | } | |
2365 | ||
2366 | /* Prepare message that can be sent to clients that have a matching | |
2367 | filter */ | |
2368 | msg = new_msg_lsa_change_notify(msgtype, 0L, /* no sequence number */ | |
2369 | ifaddr, area_id, | |
2370 | lsa->flags & OSPF_LSA_SELF, lsa->data); | |
2371 | if (!msg) { | |
2372 | zlog_warn( | |
2373 | "apiserver_clients_lsa_change_notify: msg_new failed"); | |
2374 | return; | |
2375 | } | |
2376 | ||
2377 | /* Now send message to all clients with a matching filter */ | |
2378 | for (ALL_LIST_ELEMENTS(apiserver_list, node, nnode, apiserv)) { | |
2379 | struct lsa_filter_type *filter; | |
2380 | u_int16_t mask; | |
2381 | u_int32_t *area; | |
2382 | int i; | |
2383 | ||
2384 | /* Check filter for this client. */ | |
2385 | filter = apiserv->filter; | |
2386 | ||
2387 | /* Check area IDs in case of non AS-E LSAs. | |
2388 | * If filter has areas (num_areas > 0), | |
2389 | * then one of the areas must match the area ID of this LSA. */ | |
2390 | ||
2391 | i = filter->num_areas; | |
2392 | if ((lsa->data->type == OSPF_AS_EXTERNAL_LSA) | |
2393 | || (lsa->data->type == OSPF_OPAQUE_AS_LSA)) { | |
2394 | i = 0; | |
2d33f157 | 2395 | } |
ac4d0be5 | 2396 | |
2397 | if (i > 0) { | |
2398 | area = (u_int32_t *)(filter + 1); | |
2399 | while (i) { | |
2400 | if (*area == area_id.s_addr) { | |
2401 | break; | |
2402 | } | |
2403 | i--; | |
2404 | area++; | |
2405 | } | |
2406 | } else { | |
2407 | i = 1; | |
2408 | } | |
2409 | ||
2410 | if (i > 0) { | |
2411 | /* Area match. Check LSA type. */ | |
2412 | mask = ntohs(filter->typemask); | |
2413 | ||
2414 | if (mask & Power2[lsa->data->type]) { | |
2415 | /* Type also matches. Check origin. */ | |
2416 | if ((filter->origin == ANY_ORIGIN) | |
2417 | || (filter->origin == IS_LSA_SELF(lsa))) { | |
2418 | ospf_apiserver_send_msg(apiserv, msg); | |
2419 | } | |
2420 | } | |
2d33f157 | 2421 | } |
2d33f157 | 2422 | } |
ac4d0be5 | 2423 | /* Free message since it is not used anymore */ |
2424 | msg_free(msg); | |
2d33f157 | 2425 | } |
2426 | ||
2427 | ||
2428 | /* ------------------------------------------------------------- | |
2429 | * Followings are hooks invoked when LSAs are updated or deleted | |
2430 | * ------------------------------------------------------------- | |
2431 | */ | |
2432 | ||
2433 | ||
ac4d0be5 | 2434 | static int apiserver_notify_clients_lsa(u_char msgtype, struct ospf_lsa *lsa) |
2d33f157 | 2435 | { |
ac4d0be5 | 2436 | struct msg *msg; |
2437 | /* default area for AS-External and Opaque11 LSAs */ | |
2438 | struct in_addr area_id = {.s_addr = 0L}; | |
2439 | ||
2440 | /* default interface for non Opaque9 LSAs */ | |
2441 | struct in_addr ifaddr = {.s_addr = 0L}; | |
2442 | ||
2443 | /* Only notify this update if the LSA's age is smaller than | |
2444 | MAXAGE. Otherwise clients would see LSA updates with max age just | |
2445 | before they are deleted from the LSDB. LSA delete messages have | |
2446 | MAXAGE too but should not be filtered. */ | |
2447 | if (IS_LSA_MAXAGE(lsa) && (msgtype == MSG_LSA_UPDATE_NOTIFY)) { | |
2448 | return 0; | |
2449 | } | |
2450 | ||
2451 | if (lsa->area) { | |
2452 | area_id = lsa->area->area_id; | |
2453 | } | |
2454 | if (lsa->data->type == OSPF_OPAQUE_LINK_LSA) { | |
2455 | ifaddr = lsa->oi->address->u.prefix4; | |
2456 | } | |
2457 | msg = new_msg_lsa_change_notify(msgtype, 0L, /* no sequence number */ | |
2458 | ifaddr, area_id, | |
2459 | lsa->flags & OSPF_LSA_SELF, lsa->data); | |
2460 | if (!msg) { | |
2461 | zlog_warn("notify_clients_lsa: msg_new failed"); | |
2462 | return -1; | |
2463 | } | |
2464 | /* Notify all clients that new LSA is added/updated */ | |
2465 | apiserver_clients_lsa_change_notify(msgtype, lsa); | |
2466 | ||
2467 | /* Clients made their own copies of msg so we can free msg here */ | |
2468 | msg_free(msg); | |
2469 | ||
2470 | return 0; | |
2d33f157 | 2471 | } |
2472 | ||
ac4d0be5 | 2473 | int ospf_apiserver_lsa_update(struct ospf_lsa *lsa) |
2d33f157 | 2474 | { |
ac4d0be5 | 2475 | return apiserver_notify_clients_lsa(MSG_LSA_UPDATE_NOTIFY, lsa); |
2d33f157 | 2476 | } |
2477 | ||
ac4d0be5 | 2478 | int ospf_apiserver_lsa_delete(struct ospf_lsa *lsa) |
2d33f157 | 2479 | { |
ac4d0be5 | 2480 | return apiserver_notify_clients_lsa(MSG_LSA_DELETE_NOTIFY, lsa); |
2d33f157 | 2481 | } |
2482 | ||
2483 | #endif /* SUPPORT_OSPF_API */ |