bus: Add an ike_update() hook invoked when peer endpoints change
[strongswan.git] / src / libcharon / sa / ike_sa.c
1 /*
2 * Copyright (C) 2006-2014 Tobias Brunner
3 * Copyright (C) 2006 Daniel Roethlisberger
4 * Copyright (C) 2005-2009 Martin Willi
5 * Copyright (C) 2005 Jan Hutter
6 * Hochschule fuer Technik Rapperswil
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
15 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
16 * for more details.
17 */
18
19 /*
20 * Copyright (c) 2014 Volker RĂ¼melin
21 *
22 * Permission is hereby granted, free of charge, to any person obtaining a copy
23 * of this software and associated documentation files (the "Software"), to deal
24 * in the Software without restriction, including without limitation the rights
25 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
26 * copies of the Software, and to permit persons to whom the Software is
27 * furnished to do so, subject to the following conditions:
28 *
29 * The above copyright notice and this permission notice shall be included in
30 * all copies or substantial portions of the Software.
31 *
32 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
33 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
34 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
35 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
36 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
37 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
38 * THE SOFTWARE.
39 */
40
41 #include <string.h>
42 #include <sys/stat.h>
43 #include <errno.h>
44 #include <time.h>
45
46 #include "ike_sa.h"
47
48 #include <library.h>
49 #include <hydra.h>
50 #include <daemon.h>
51 #include <collections/array.h>
52 #include <utils/lexparser.h>
53 #include <processing/jobs/retransmit_job.h>
54 #include <processing/jobs/delete_ike_sa_job.h>
55 #include <processing/jobs/send_dpd_job.h>
56 #include <processing/jobs/send_keepalive_job.h>
57 #include <processing/jobs/rekey_ike_sa_job.h>
58 #include <processing/jobs/retry_initiate_job.h>
59 #include <sa/ikev2/tasks/ike_auth_lifetime.h>
60
61 #ifdef ME
62 #include <sa/ikev2/tasks/ike_me.h>
63 #include <processing/jobs/initiate_mediation_job.h>
64 #endif
65
66 ENUM(ike_sa_state_names, IKE_CREATED, IKE_DESTROYING,
67 "CREATED",
68 "CONNECTING",
69 "ESTABLISHED",
70 "PASSIVE",
71 "REKEYING",
72 "DELETING",
73 "DESTROYING",
74 );
75
76 typedef struct private_ike_sa_t private_ike_sa_t;
77 typedef struct attribute_entry_t attribute_entry_t;
78
79 /**
80 * Private data of an ike_sa_t object.
81 */
82 struct private_ike_sa_t {
83
84 /**
85 * Public members
86 */
87 ike_sa_t public;
88
89 /**
90 * Identifier for the current IKE_SA.
91 */
92 ike_sa_id_t *ike_sa_id;
93
94 /**
95 * IKE version of this SA.
96 */
97 ike_version_t version;
98
99 /**
100 * unique numerical ID for this IKE_SA.
101 */
102 u_int32_t unique_id;
103
104 /**
105 * Current state of the IKE_SA
106 */
107 ike_sa_state_t state;
108
109 /**
110 * IKE configuration used to set up this IKE_SA
111 */
112 ike_cfg_t *ike_cfg;
113
114 /**
115 * Peer and authentication information to establish IKE_SA.
116 */
117 peer_cfg_t *peer_cfg;
118
119 /**
120 * currently used authentication ruleset, local
121 */
122 auth_cfg_t *my_auth;
123
124 /**
125 * currently used authentication constraints, remote
126 */
127 auth_cfg_t *other_auth;
128
129 /**
130 * Array of completed local authentication rounds (as auth_cfg_t)
131 */
132 array_t *my_auths;
133
134 /**
135 * Array of completed remote authentication rounds (as auth_cfg_t)
136 */
137 array_t *other_auths;
138
139 /**
140 * Selected IKE proposal
141 */
142 proposal_t *proposal;
143
144 /**
145 * Juggles tasks to process messages
146 */
147 task_manager_t *task_manager;
148
149 /**
150 * Address of local host
151 */
152 host_t *my_host;
153
154 /**
155 * Address of remote host
156 */
157 host_t *other_host;
158
159 #ifdef ME
160 /**
161 * Are we mediation server
162 */
163 bool is_mediation_server;
164
165 /**
166 * Server reflexive host
167 */
168 host_t *server_reflexive_host;
169
170 /**
171 * Connect ID
172 */
173 chunk_t connect_id;
174 #endif /* ME */
175
176 /**
177 * Identification used for us
178 */
179 identification_t *my_id;
180
181 /**
182 * Identification used for other
183 */
184 identification_t *other_id;
185
186 /**
187 * set of extensions the peer supports
188 */
189 ike_extension_t extensions;
190
191 /**
192 * set of condition flags currently enabled for this IKE_SA
193 */
194 ike_condition_t conditions;
195
196 /**
197 * Array containing the child sa's of the current IKE_SA.
198 */
199 array_t *child_sas;
200
201 /**
202 * keymat of this IKE_SA
203 */
204 keymat_t *keymat;
205
206 /**
207 * Virtual IPs on local host
208 */
209 array_t *my_vips;
210
211 /**
212 * Virtual IPs on remote host
213 */
214 array_t *other_vips;
215
216 /**
217 * List of configuration attributes (attribute_entry_t)
218 */
219 array_t *attributes;
220
221 /**
222 * list of peer's addresses, additional ones transmitted via MOBIKE
223 */
224 array_t *peer_addresses;
225
226 /**
227 * previously value of received DESTINATION_IP hash
228 */
229 chunk_t nat_detection_dest;
230
231 /**
232 * number pending UPDATE_SA_ADDRESS (MOBIKE)
233 */
234 u_int32_t pending_updates;
235
236 /**
237 * NAT keep alive interval
238 */
239 u_int32_t keepalive_interval;
240
241 /**
242 * interval for retries during initiation (e.g. if DNS resolution failed),
243 * 0 to disable (default)
244 */
245 u_int32_t retry_initiate_interval;
246
247 /**
248 * TRUE if a retry_initiate_job has been queued
249 */
250 bool retry_initiate_queued;
251
252 /**
253 * Timestamps for this IKE_SA
254 */
255 u_int32_t stats[STAT_MAX];
256
257 /**
258 * how many times we have retried so far (keyingtries)
259 */
260 u_int32_t keyingtry;
261
262 /**
263 * local host address to be used for IKE, set via MIGRATE kernel message
264 */
265 host_t *local_host;
266
267 /**
268 * remote host address to be used for IKE, set via MIGRATE kernel message
269 */
270 host_t *remote_host;
271
272 /**
273 * Flush auth configs once established?
274 */
275 bool flush_auth_cfg;
276
277 /**
278 * Maximum length of a single fragment, 0 for address-specific defaults
279 */
280 size_t fragment_size;
281 };
282
283 /**
284 * Entry to maintain install configuration attributes during IKE_SA lifetime
285 */
286 struct attribute_entry_t {
287 /** handler used to install this attribute */
288 attribute_handler_t *handler;
289 /** attribute type */
290 configuration_attribute_type_t type;
291 /** attribute data */
292 chunk_t data;
293 };
294
295 /**
296 * get the time of the latest traffic processed by the kernel
297 */
298 static time_t get_use_time(private_ike_sa_t* this, bool inbound)
299 {
300 enumerator_t *enumerator;
301 child_sa_t *child_sa;
302 time_t use_time, current;
303
304 if (inbound)
305 {
306 use_time = this->stats[STAT_INBOUND];
307 }
308 else
309 {
310 use_time = this->stats[STAT_OUTBOUND];
311 }
312
313 enumerator = array_create_enumerator(this->child_sas);
314 while (enumerator->enumerate(enumerator, &child_sa))
315 {
316 child_sa->get_usestats(child_sa, inbound, &current, NULL, NULL);
317 use_time = max(use_time, current);
318 }
319 enumerator->destroy(enumerator);
320
321 return use_time;
322 }
323
324 METHOD(ike_sa_t, get_unique_id, u_int32_t,
325 private_ike_sa_t *this)
326 {
327 return this->unique_id;
328 }
329
330 METHOD(ike_sa_t, get_name, char*,
331 private_ike_sa_t *this)
332 {
333 if (this->peer_cfg)
334 {
335 return this->peer_cfg->get_name(this->peer_cfg);
336 }
337 return "(unnamed)";
338 }
339
340 METHOD(ike_sa_t, get_statistic, u_int32_t,
341 private_ike_sa_t *this, statistic_t kind)
342 {
343 if (kind < STAT_MAX)
344 {
345 return this->stats[kind];
346 }
347 return 0;
348 }
349
350 METHOD(ike_sa_t, set_statistic, void,
351 private_ike_sa_t *this, statistic_t kind, u_int32_t value)
352 {
353 if (kind < STAT_MAX)
354 {
355 this->stats[kind] = value;
356 }
357 }
358
359 METHOD(ike_sa_t, get_my_host, host_t*,
360 private_ike_sa_t *this)
361 {
362 return this->my_host;
363 }
364
365 METHOD(ike_sa_t, set_my_host, void,
366 private_ike_sa_t *this, host_t *me)
367 {
368 DESTROY_IF(this->my_host);
369 this->my_host = me;
370 }
371
372 METHOD(ike_sa_t, get_other_host, host_t*,
373 private_ike_sa_t *this)
374 {
375 return this->other_host;
376 }
377
378 METHOD(ike_sa_t, set_other_host, void,
379 private_ike_sa_t *this, host_t *other)
380 {
381 DESTROY_IF(this->other_host);
382 this->other_host = other;
383 }
384
385 METHOD(ike_sa_t, get_peer_cfg, peer_cfg_t*,
386 private_ike_sa_t *this)
387 {
388 return this->peer_cfg;
389 }
390
391 METHOD(ike_sa_t, set_peer_cfg, void,
392 private_ike_sa_t *this, peer_cfg_t *peer_cfg)
393 {
394 peer_cfg->get_ref(peer_cfg);
395 DESTROY_IF(this->peer_cfg);
396 this->peer_cfg = peer_cfg;
397
398 if (this->ike_cfg == NULL)
399 {
400 this->ike_cfg = peer_cfg->get_ike_cfg(peer_cfg);
401 this->ike_cfg->get_ref(this->ike_cfg);
402 }
403 }
404
405 METHOD(ike_sa_t, get_auth_cfg, auth_cfg_t*,
406 private_ike_sa_t *this, bool local)
407 {
408 if (local)
409 {
410 return this->my_auth;
411 }
412 return this->other_auth;
413 }
414
415 METHOD(ike_sa_t, add_auth_cfg, void,
416 private_ike_sa_t *this, bool local, auth_cfg_t *cfg)
417 {
418 if (local)
419 {
420 array_insert(this->my_auths, ARRAY_TAIL, cfg);
421 }
422 else
423 {
424 array_insert(this->other_auths, ARRAY_TAIL, cfg);
425 }
426 }
427
428 METHOD(ike_sa_t, create_auth_cfg_enumerator, enumerator_t*,
429 private_ike_sa_t *this, bool local)
430 {
431 if (local)
432 {
433 return array_create_enumerator(this->my_auths);
434 }
435 return array_create_enumerator(this->other_auths);
436 }
437
438 /**
439 * Flush the stored authentication round information
440 */
441 static void flush_auth_cfgs(private_ike_sa_t *this)
442 {
443 auth_cfg_t *cfg;
444
445 this->my_auth->purge(this->my_auth, FALSE);
446 this->other_auth->purge(this->other_auth, FALSE);
447
448 while (array_remove(this->my_auths, ARRAY_TAIL, &cfg))
449 {
450 cfg->destroy(cfg);
451 }
452 while (array_remove(this->other_auths, ARRAY_TAIL, &cfg))
453 {
454 cfg->destroy(cfg);
455 }
456 }
457
458 METHOD(ike_sa_t, get_proposal, proposal_t*,
459 private_ike_sa_t *this)
460 {
461 return this->proposal;
462 }
463
464 METHOD(ike_sa_t, set_proposal, void,
465 private_ike_sa_t *this, proposal_t *proposal)
466 {
467 DESTROY_IF(this->proposal);
468 this->proposal = proposal->clone(proposal);
469 }
470
471 METHOD(ike_sa_t, set_message_id, void,
472 private_ike_sa_t *this, bool initiate, u_int32_t mid)
473 {
474 if (initiate)
475 {
476 this->task_manager->reset(this->task_manager, mid, UINT_MAX);
477 }
478 else
479 {
480 this->task_manager->reset(this->task_manager, UINT_MAX, mid);
481 }
482 }
483
484 METHOD(ike_sa_t, send_keepalive, void,
485 private_ike_sa_t *this)
486 {
487 send_keepalive_job_t *job;
488 time_t last_out, now, diff;
489
490 if (!(this->conditions & COND_NAT_HERE) || this->keepalive_interval == 0)
491 { /* disable keep alives if we are not NATed anymore */
492 return;
493 }
494
495 last_out = get_use_time(this, FALSE);
496 now = time_monotonic(NULL);
497
498 diff = now - last_out;
499
500 if (diff >= this->keepalive_interval)
501 {
502 packet_t *packet;
503 chunk_t data;
504
505 packet = packet_create();
506 packet->set_source(packet, this->my_host->clone(this->my_host));
507 packet->set_destination(packet, this->other_host->clone(this->other_host));
508 data.ptr = malloc(1);
509 data.ptr[0] = 0xFF;
510 data.len = 1;
511 packet->set_data(packet, data);
512 DBG1(DBG_IKE, "sending keep alive to %#H", this->other_host);
513 charon->sender->send_no_marker(charon->sender, packet);
514 diff = 0;
515 }
516 job = send_keepalive_job_create(this->ike_sa_id);
517 lib->scheduler->schedule_job(lib->scheduler, (job_t*)job,
518 this->keepalive_interval - diff);
519 }
520
521 METHOD(ike_sa_t, get_ike_cfg, ike_cfg_t*,
522 private_ike_sa_t *this)
523 {
524 return this->ike_cfg;
525 }
526
527 METHOD(ike_sa_t, set_ike_cfg, void,
528 private_ike_sa_t *this, ike_cfg_t *ike_cfg)
529 {
530 ike_cfg->get_ref(ike_cfg);
531 this->ike_cfg = ike_cfg;
532 }
533
534 METHOD(ike_sa_t, enable_extension, void,
535 private_ike_sa_t *this, ike_extension_t extension)
536 {
537 this->extensions |= extension;
538 }
539
540 METHOD(ike_sa_t, supports_extension, bool,
541 private_ike_sa_t *this, ike_extension_t extension)
542 {
543 return (this->extensions & extension) != FALSE;
544 }
545
546 METHOD(ike_sa_t, has_condition, bool,
547 private_ike_sa_t *this, ike_condition_t condition)
548 {
549 return (this->conditions & condition) != FALSE;
550 }
551
552 METHOD(ike_sa_t, set_condition, void,
553 private_ike_sa_t *this, ike_condition_t condition, bool enable)
554 {
555 if (has_condition(this, condition) != enable)
556 {
557 if (enable)
558 {
559 this->conditions |= condition;
560 switch (condition)
561 {
562 case COND_NAT_HERE:
563 DBG1(DBG_IKE, "local host is behind NAT, sending keep alives");
564 this->conditions |= COND_NAT_ANY;
565 send_keepalive(this);
566 break;
567 case COND_NAT_THERE:
568 DBG1(DBG_IKE, "remote host is behind NAT");
569 this->conditions |= COND_NAT_ANY;
570 break;
571 case COND_NAT_FAKE:
572 DBG1(DBG_IKE, "faking NAT situation to enforce UDP encapsulation");
573 this->conditions |= COND_NAT_ANY;
574 break;
575 default:
576 break;
577 }
578 }
579 else
580 {
581 this->conditions &= ~condition;
582 switch (condition)
583 {
584 case COND_NAT_HERE:
585 case COND_NAT_FAKE:
586 case COND_NAT_THERE:
587 set_condition(this, COND_NAT_ANY,
588 has_condition(this, COND_NAT_HERE) ||
589 has_condition(this, COND_NAT_THERE) ||
590 has_condition(this, COND_NAT_FAKE));
591 break;
592 default:
593 break;
594 }
595 }
596 }
597 }
598
599 METHOD(ike_sa_t, send_dpd, status_t,
600 private_ike_sa_t *this)
601 {
602 job_t *job;
603 time_t diff, delay;
604 bool task_queued = FALSE;
605
606 if (this->state == IKE_PASSIVE)
607 {
608 return INVALID_STATE;
609 }
610 delay = this->peer_cfg->get_dpd(this->peer_cfg);
611 if (this->task_manager->busy(this->task_manager))
612 {
613 /* an exchange is in the air, no need to start a DPD check */
614 diff = 0;
615 }
616 else
617 {
618 /* check if there was any inbound traffic */
619 time_t last_in, now;
620 last_in = get_use_time(this, TRUE);
621 now = time_monotonic(NULL);
622 diff = now - last_in;
623 if (!delay || diff >= delay)
624 {
625 /* too long ago, initiate dead peer detection */
626 DBG1(DBG_IKE, "sending DPD request");
627 this->task_manager->queue_dpd(this->task_manager);
628 task_queued = TRUE;
629 diff = 0;
630 }
631 }
632 /* recheck in "interval" seconds */
633 if (delay)
634 {
635 job = (job_t*)send_dpd_job_create(this->ike_sa_id);
636 lib->scheduler->schedule_job(lib->scheduler, job, delay - diff);
637 }
638 if (task_queued)
639 {
640 return this->task_manager->initiate(this->task_manager);
641 }
642 return SUCCESS;
643 }
644
645 METHOD(ike_sa_t, get_state, ike_sa_state_t,
646 private_ike_sa_t *this)
647 {
648 return this->state;
649 }
650
651 METHOD(ike_sa_t, set_state, void,
652 private_ike_sa_t *this, ike_sa_state_t state)
653 {
654 bool trigger_dpd = FALSE;
655
656 DBG2(DBG_IKE, "IKE_SA %s[%d] state change: %N => %N",
657 get_name(this), this->unique_id,
658 ike_sa_state_names, this->state,
659 ike_sa_state_names, state);
660
661 switch (state)
662 {
663 case IKE_ESTABLISHED:
664 {
665 if (this->state == IKE_CONNECTING ||
666 this->state == IKE_PASSIVE)
667 {
668 job_t *job;
669 u_int32_t t;
670
671 /* calculate rekey, reauth and lifetime */
672 this->stats[STAT_ESTABLISHED] = time_monotonic(NULL);
673
674 /* schedule rekeying if we have a time which is smaller than
675 * an already scheduled rekeying */
676 t = this->peer_cfg->get_rekey_time(this->peer_cfg, TRUE);
677 if (t && (this->stats[STAT_REKEY] == 0 ||
678 (this->stats[STAT_REKEY] > t + this->stats[STAT_ESTABLISHED])))
679 {
680 this->stats[STAT_REKEY] = t + this->stats[STAT_ESTABLISHED];
681 job = (job_t*)rekey_ike_sa_job_create(this->ike_sa_id, FALSE);
682 lib->scheduler->schedule_job(lib->scheduler, job, t);
683 DBG1(DBG_IKE, "scheduling rekeying in %ds", t);
684 }
685 t = this->peer_cfg->get_reauth_time(this->peer_cfg, TRUE);
686 if (t && (this->stats[STAT_REAUTH] == 0 ||
687 (this->stats[STAT_REAUTH] > t + this->stats[STAT_ESTABLISHED])))
688 {
689 this->stats[STAT_REAUTH] = t + this->stats[STAT_ESTABLISHED];
690 job = (job_t*)rekey_ike_sa_job_create(this->ike_sa_id, TRUE);
691 lib->scheduler->schedule_job(lib->scheduler, job, t);
692 DBG1(DBG_IKE, "scheduling reauthentication in %ds", t);
693 }
694 t = this->peer_cfg->get_over_time(this->peer_cfg);
695 if (this->stats[STAT_REKEY] || this->stats[STAT_REAUTH])
696 {
697 if (this->stats[STAT_REAUTH] == 0)
698 {
699 this->stats[STAT_DELETE] = this->stats[STAT_REKEY];
700 }
701 else if (this->stats[STAT_REKEY] == 0)
702 {
703 this->stats[STAT_DELETE] = this->stats[STAT_REAUTH];
704 }
705 else
706 {
707 this->stats[STAT_DELETE] = min(this->stats[STAT_REKEY],
708 this->stats[STAT_REAUTH]);
709 }
710 this->stats[STAT_DELETE] += t;
711 t = this->stats[STAT_DELETE] - this->stats[STAT_ESTABLISHED];
712 job = (job_t*)delete_ike_sa_job_create(this->ike_sa_id, TRUE);
713 lib->scheduler->schedule_job(lib->scheduler, job, t);
714 DBG1(DBG_IKE, "maximum IKE_SA lifetime %ds", t);
715 }
716 trigger_dpd = this->peer_cfg->get_dpd(this->peer_cfg);
717 if (trigger_dpd)
718 {
719 /* Some peers delay the DELETE after rekeying an IKE_SA.
720 * If this delay is longer than our DPD delay, we would
721 * send a DPD request here. The IKE_SA is not ready to do
722 * so yet, so prevent that. */
723 this->stats[STAT_INBOUND] = this->stats[STAT_ESTABLISHED];
724 }
725 }
726 break;
727 }
728 default:
729 break;
730 }
731 charon->bus->ike_state_change(charon->bus, &this->public, state);
732 this->state = state;
733
734 if (trigger_dpd)
735 {
736 if (supports_extension(this, EXT_DPD))
737 {
738 send_dpd(this);
739 }
740 else
741 {
742 DBG1(DBG_IKE, "DPD not supported by peer, disabled");
743 }
744 }
745 }
746
747 METHOD(ike_sa_t, reset, void,
748 private_ike_sa_t *this)
749 {
750 /* the responder ID is reset, as peer may choose another one */
751 if (this->ike_sa_id->is_initiator(this->ike_sa_id))
752 {
753 this->ike_sa_id->set_responder_spi(this->ike_sa_id, 0);
754 }
755
756 set_state(this, IKE_CREATED);
757
758 flush_auth_cfgs(this);
759
760 this->keymat->destroy(this->keymat);
761 this->keymat = keymat_create(this->version,
762 this->ike_sa_id->is_initiator(this->ike_sa_id));
763
764 this->task_manager->reset(this->task_manager, 0, 0);
765 }
766
767 METHOD(ike_sa_t, get_keymat, keymat_t*,
768 private_ike_sa_t *this)
769 {
770 return this->keymat;
771 }
772
773 METHOD(ike_sa_t, add_virtual_ip, void,
774 private_ike_sa_t *this, bool local, host_t *ip)
775 {
776 if (local)
777 {
778 char *iface;
779
780 if (hydra->kernel_interface->get_interface(hydra->kernel_interface,
781 this->my_host, &iface))
782 {
783 DBG1(DBG_IKE, "installing new virtual IP %H", ip);
784 if (hydra->kernel_interface->add_ip(hydra->kernel_interface,
785 ip, -1, iface) == SUCCESS)
786 {
787 array_insert_create(&this->my_vips, ARRAY_TAIL, ip->clone(ip));
788 }
789 else
790 {
791 DBG1(DBG_IKE, "installing virtual IP %H failed", ip);
792 }
793 free(iface);
794 }
795 else
796 {
797 DBG1(DBG_IKE, "looking up interface for virtual IP %H failed", ip);
798 }
799 }
800 else
801 {
802 array_insert_create(&this->other_vips, ARRAY_TAIL, ip->clone(ip));
803 }
804 }
805
806
807 METHOD(ike_sa_t, clear_virtual_ips, void,
808 private_ike_sa_t *this, bool local)
809 {
810 array_t *vips;
811 host_t *vip;
812
813 vips = local ? this->my_vips : this->other_vips;
814 if (!local && array_count(vips))
815 {
816 charon->bus->assign_vips(charon->bus, &this->public, FALSE);
817 }
818 while (array_remove(vips, ARRAY_HEAD, &vip))
819 {
820 if (local)
821 {
822 hydra->kernel_interface->del_ip(hydra->kernel_interface,
823 vip, -1, TRUE);
824 }
825 vip->destroy(vip);
826 }
827 }
828
829 METHOD(ike_sa_t, create_virtual_ip_enumerator, enumerator_t*,
830 private_ike_sa_t *this, bool local)
831 {
832 if (local)
833 {
834 return array_create_enumerator(this->my_vips);
835 }
836 return array_create_enumerator(this->other_vips);
837 }
838
839 METHOD(ike_sa_t, add_peer_address, void,
840 private_ike_sa_t *this, host_t *host)
841 {
842 array_insert_create(&this->peer_addresses, ARRAY_TAIL, host);
843 }
844
845 METHOD(ike_sa_t, create_peer_address_enumerator, enumerator_t*,
846 private_ike_sa_t *this)
847 {
848 if (this->peer_addresses)
849 {
850 return array_create_enumerator(this->peer_addresses);
851 }
852 /* in case we don't have MOBIKE */
853 return enumerator_create_single(this->other_host, NULL);
854 }
855
856 METHOD(ike_sa_t, clear_peer_addresses, void,
857 private_ike_sa_t *this)
858 {
859 array_destroy_offset(this->peer_addresses, offsetof(host_t, destroy));
860 this->peer_addresses = NULL;
861 }
862
863 METHOD(ike_sa_t, has_mapping_changed, bool,
864 private_ike_sa_t *this, chunk_t hash)
865 {
866 if (this->nat_detection_dest.ptr == NULL)
867 {
868 this->nat_detection_dest = chunk_clone(hash);
869 return FALSE;
870 }
871 if (chunk_equals(hash, this->nat_detection_dest))
872 {
873 return FALSE;
874 }
875 free(this->nat_detection_dest.ptr);
876 this->nat_detection_dest = chunk_clone(hash);
877 return TRUE;
878 }
879
880 METHOD(ike_sa_t, set_pending_updates, void,
881 private_ike_sa_t *this, u_int32_t updates)
882 {
883 this->pending_updates = updates;
884 }
885
886 METHOD(ike_sa_t, get_pending_updates, u_int32_t,
887 private_ike_sa_t *this)
888 {
889 return this->pending_updates;
890 }
891
892 METHOD(ike_sa_t, float_ports, void,
893 private_ike_sa_t *this)
894 {
895 /* do not switch if we have a custom port from MOBIKE/NAT */
896 if (this->my_host->get_port(this->my_host) ==
897 charon->socket->get_port(charon->socket, FALSE))
898 {
899 this->my_host->set_port(this->my_host,
900 charon->socket->get_port(charon->socket, TRUE));
901 }
902 if (this->other_host->get_port(this->other_host) == IKEV2_UDP_PORT)
903 {
904 this->other_host->set_port(this->other_host, IKEV2_NATT_PORT);
905 }
906 }
907
908 METHOD(ike_sa_t, update_hosts, void,
909 private_ike_sa_t *this, host_t *me, host_t *other, bool force)
910 {
911 bool update = FALSE;
912
913 if (me == NULL)
914 {
915 me = this->my_host;
916 }
917 if (other == NULL)
918 {
919 other = this->other_host;
920 }
921
922 /* apply hosts on first received message */
923 if (this->my_host->is_anyaddr(this->my_host) ||
924 this->other_host->is_anyaddr(this->other_host))
925 {
926 set_my_host(this, me->clone(me));
927 set_other_host(this, other->clone(other));
928 update = TRUE;
929 }
930 else
931 {
932 /* update our address in any case */
933 if (force && !me->equals(me, this->my_host))
934 {
935 charon->bus->ike_update(charon->bus, &this->public, TRUE, me);
936 set_my_host(this, me->clone(me));
937 update = TRUE;
938 }
939
940 if (!other->equals(other, this->other_host) &&
941 (force || has_condition(this, COND_NAT_THERE)))
942 {
943 /* only update other's address if we are behind a static NAT,
944 * which we assume is the case if we are not initiator */
945 if (force ||
946 (!has_condition(this, COND_NAT_HERE) ||
947 !has_condition(this, COND_ORIGINAL_INITIATOR)))
948 {
949 charon->bus->ike_update(charon->bus, &this->public, FALSE, other);
950 set_other_host(this, other->clone(other));
951 update = TRUE;
952 }
953 }
954 }
955
956 /* update all associated CHILD_SAs, if required */
957 if (update)
958 {
959 enumerator_t *enumerator;
960 child_sa_t *child_sa;
961 linked_list_t *vips;
962
963 vips = linked_list_create_from_enumerator(
964 array_create_enumerator(this->my_vips));
965
966 enumerator = array_create_enumerator(this->child_sas);
967 while (enumerator->enumerate(enumerator, &child_sa))
968 {
969 charon->child_sa_manager->remove(charon->child_sa_manager, child_sa);
970 charon->child_sa_manager->add(charon->child_sa_manager,
971 child_sa, &this->public);
972
973 if (child_sa->update(child_sa, this->my_host, this->other_host,
974 vips, has_condition(this, COND_NAT_ANY)) == NOT_SUPPORTED)
975 {
976 this->public.rekey_child_sa(&this->public,
977 child_sa->get_protocol(child_sa),
978 child_sa->get_spi(child_sa, TRUE));
979 }
980
981 }
982 enumerator->destroy(enumerator);
983
984 vips->destroy(vips);
985 }
986 }
987
988 /**
989 * Set configured DSCP value on packet
990 */
991 static void set_dscp(private_ike_sa_t *this, packet_t *packet)
992 {
993 ike_cfg_t *ike_cfg;
994
995 /* prefer IKE config on peer_cfg, as its selection is more accurate
996 * then the initial IKE config */
997 if (this->peer_cfg)
998 {
999 ike_cfg = this->peer_cfg->get_ike_cfg(this->peer_cfg);
1000 }
1001 else
1002 {
1003 ike_cfg = this->ike_cfg;
1004 }
1005 if (ike_cfg)
1006 {
1007 packet->set_dscp(packet, ike_cfg->get_dscp(ike_cfg));
1008 }
1009 }
1010
1011 METHOD(ike_sa_t, generate_message, status_t,
1012 private_ike_sa_t *this, message_t *message, packet_t **packet)
1013 {
1014 status_t status;
1015
1016 if (message->is_encoded(message))
1017 { /* already encoded in task, but set DSCP value */
1018 *packet = message->get_packet(message);
1019 set_dscp(this, *packet);
1020 return SUCCESS;
1021 }
1022 this->stats[STAT_OUTBOUND] = time_monotonic(NULL);
1023 message->set_ike_sa_id(message, this->ike_sa_id);
1024 charon->bus->message(charon->bus, message, FALSE, TRUE);
1025 status = message->generate(message, this->keymat, packet);
1026 if (status == SUCCESS)
1027 {
1028 set_dscp(this, *packet);
1029 charon->bus->message(charon->bus, message, FALSE, FALSE);
1030 }
1031 return status;
1032 }
1033
1034 static bool filter_fragments(private_ike_sa_t *this, packet_t **fragment,
1035 packet_t **packet)
1036 {
1037 *packet = (*fragment)->clone(*fragment);
1038 set_dscp(this, *packet);
1039 return TRUE;
1040 }
1041
1042 METHOD(ike_sa_t, generate_message_fragmented, status_t,
1043 private_ike_sa_t *this, message_t *message, enumerator_t **packets)
1044 {
1045 enumerator_t *fragments;
1046 packet_t *packet;
1047 status_t status;
1048 bool use_frags = FALSE;
1049
1050 if (this->ike_cfg)
1051 {
1052 switch (this->ike_cfg->fragmentation(this->ike_cfg))
1053 {
1054 case FRAGMENTATION_FORCE:
1055 use_frags = TRUE;
1056 break;
1057 case FRAGMENTATION_YES:
1058 use_frags = supports_extension(this, EXT_IKE_FRAGMENTATION);
1059 if (use_frags && this->version == IKEV1 &&
1060 supports_extension(this, EXT_MS_WINDOWS))
1061 {
1062 /* It seems Windows 7 and 8 peers only accept proprietary
1063 * fragmented messages if they expect certificates. */
1064 use_frags = message->get_payload(message,
1065 PLV1_CERTIFICATE) != NULL;
1066 }
1067 break;
1068 default:
1069 break;
1070 }
1071 }
1072 if (!use_frags)
1073 {
1074 status = generate_message(this, message, &packet);
1075 if (status != SUCCESS)
1076 {
1077 return status;
1078 }
1079 *packets = enumerator_create_single(packet, NULL);
1080 return SUCCESS;
1081 }
1082
1083 this->stats[STAT_OUTBOUND] = time_monotonic(NULL);
1084 message->set_ike_sa_id(message, this->ike_sa_id);
1085 charon->bus->message(charon->bus, message, FALSE, TRUE);
1086 status = message->fragment(message, this->keymat, this->fragment_size,
1087 &fragments);
1088 if (status == SUCCESS)
1089 {
1090 charon->bus->message(charon->bus, message, FALSE, FALSE);
1091 *packets = enumerator_create_filter(fragments, (void*)filter_fragments,
1092 this, NULL);
1093 }
1094 return status;
1095 }
1096
1097 METHOD(ike_sa_t, set_kmaddress, void,
1098 private_ike_sa_t *this, host_t *local, host_t *remote)
1099 {
1100 DESTROY_IF(this->local_host);
1101 DESTROY_IF(this->remote_host);
1102 this->local_host = local->clone(local);
1103 this->remote_host = remote->clone(remote);
1104 }
1105
1106 #ifdef ME
1107 METHOD(ike_sa_t, act_as_mediation_server, void,
1108 private_ike_sa_t *this)
1109 {
1110 charon->mediation_manager->update_sa_id(charon->mediation_manager,
1111 this->other_id, this->ike_sa_id);
1112 this->is_mediation_server = TRUE;
1113 }
1114
1115 METHOD(ike_sa_t, get_server_reflexive_host, host_t*,
1116 private_ike_sa_t *this)
1117 {
1118 return this->server_reflexive_host;
1119 }
1120
1121 METHOD(ike_sa_t, set_server_reflexive_host, void,
1122 private_ike_sa_t *this, host_t *host)
1123 {
1124 DESTROY_IF(this->server_reflexive_host);
1125 this->server_reflexive_host = host;
1126 }
1127
1128 METHOD(ike_sa_t, get_connect_id, chunk_t,
1129 private_ike_sa_t *this)
1130 {
1131 return this->connect_id;
1132 }
1133
1134 METHOD(ike_sa_t, respond, status_t,
1135 private_ike_sa_t *this, identification_t *peer_id, chunk_t connect_id)
1136 {
1137 ike_me_t *task = ike_me_create(&this->public, TRUE);
1138 task->respond(task, peer_id, connect_id);
1139 this->task_manager->queue_task(this->task_manager, (task_t*)task);
1140 return this->task_manager->initiate(this->task_manager);
1141 }
1142
1143 METHOD(ike_sa_t, callback, status_t,
1144 private_ike_sa_t *this, identification_t *peer_id)
1145 {
1146 ike_me_t *task = ike_me_create(&this->public, TRUE);
1147 task->callback(task, peer_id);
1148 this->task_manager->queue_task(this->task_manager, (task_t*)task);
1149 return this->task_manager->initiate(this->task_manager);
1150 }
1151
1152 METHOD(ike_sa_t, relay, status_t,
1153 private_ike_sa_t *this, identification_t *requester, chunk_t connect_id,
1154 chunk_t connect_key, linked_list_t *endpoints, bool response)
1155 {
1156 ike_me_t *task = ike_me_create(&this->public, TRUE);
1157 task->relay(task, requester, connect_id, connect_key, endpoints, response);
1158 this->task_manager->queue_task(this->task_manager, (task_t*)task);
1159 return this->task_manager->initiate(this->task_manager);
1160 }
1161
1162 METHOD(ike_sa_t, initiate_mediation, status_t,
1163 private_ike_sa_t *this, peer_cfg_t *mediated_cfg)
1164 {
1165 ike_me_t *task = ike_me_create(&this->public, TRUE);
1166 task->connect(task, mediated_cfg->get_peer_id(mediated_cfg));
1167 this->task_manager->queue_task(this->task_manager, (task_t*)task);
1168 return this->task_manager->initiate(this->task_manager);
1169 }
1170
1171 METHOD(ike_sa_t, initiate_mediated, status_t,
1172 private_ike_sa_t *this, host_t *me, host_t *other, chunk_t connect_id)
1173 {
1174 set_my_host(this, me->clone(me));
1175 set_other_host(this, other->clone(other));
1176 chunk_free(&this->connect_id);
1177 this->connect_id = chunk_clone(connect_id);
1178 return this->task_manager->initiate(this->task_manager);
1179 }
1180 #endif /* ME */
1181
1182 /**
1183 * Resolve DNS host in configuration
1184 */
1185 static void resolve_hosts(private_ike_sa_t *this)
1186 {
1187 host_t *host;
1188 int family = AF_UNSPEC;
1189
1190 switch (charon->socket->supported_families(charon->socket))
1191 {
1192 case SOCKET_FAMILY_IPV4:
1193 family = AF_INET;
1194 break;
1195 case SOCKET_FAMILY_IPV6:
1196 family = AF_INET6;
1197 break;
1198 case SOCKET_FAMILY_BOTH:
1199 case SOCKET_FAMILY_NONE:
1200 break;
1201 }
1202
1203 if (this->remote_host)
1204 {
1205 host = this->remote_host->clone(this->remote_host);
1206 host->set_port(host, IKEV2_UDP_PORT);
1207 }
1208 else
1209 {
1210 host = this->ike_cfg->resolve_other(this->ike_cfg, family);
1211 }
1212 if (host)
1213 {
1214 set_other_host(this, host);
1215 }
1216
1217 if (this->local_host)
1218 {
1219 host = this->local_host->clone(this->local_host);
1220 host->set_port(host, charon->socket->get_port(charon->socket, FALSE));
1221 }
1222 else
1223 {
1224 /* use same address family as for other */
1225 if (!this->other_host->is_anyaddr(this->other_host))
1226 {
1227 family = this->other_host->get_family(this->other_host);
1228 }
1229 host = this->ike_cfg->resolve_me(this->ike_cfg, family);
1230
1231 if (host && host->is_anyaddr(host) &&
1232 !this->other_host->is_anyaddr(this->other_host))
1233 {
1234 host->destroy(host);
1235 host = hydra->kernel_interface->get_source_addr(
1236 hydra->kernel_interface, this->other_host, NULL);
1237 if (host)
1238 {
1239 host->set_port(host, this->ike_cfg->get_my_port(this->ike_cfg));
1240 }
1241 else
1242 { /* fallback to address family specific %any(6), if configured */
1243 host = this->ike_cfg->resolve_me(this->ike_cfg, family);
1244 }
1245 }
1246 }
1247 if (host)
1248 {
1249 set_my_host(this, host);
1250 }
1251 }
1252
1253 METHOD(ike_sa_t, initiate, status_t,
1254 private_ike_sa_t *this, child_cfg_t *child_cfg, u_int32_t reqid,
1255 traffic_selector_t *tsi, traffic_selector_t *tsr)
1256 {
1257 bool defer_initiate = FALSE;
1258
1259 if (this->state == IKE_CREATED)
1260 {
1261 if (this->my_host->is_anyaddr(this->my_host) ||
1262 this->other_host->is_anyaddr(this->other_host))
1263 {
1264 resolve_hosts(this);
1265 }
1266
1267 if (this->other_host->is_anyaddr(this->other_host)
1268 #ifdef ME
1269 && !this->peer_cfg->get_mediated_by(this->peer_cfg)
1270 #endif /* ME */
1271 )
1272 {
1273 char *addr;
1274
1275 addr = this->ike_cfg->get_other_addr(this->ike_cfg);
1276 if (!this->retry_initiate_interval)
1277 {
1278 DBG1(DBG_IKE, "unable to resolve %s, initiate aborted",
1279 addr);
1280 DESTROY_IF(child_cfg);
1281 charon->bus->alert(charon->bus, ALERT_PEER_ADDR_FAILED);
1282 return DESTROY_ME;
1283 }
1284 DBG1(DBG_IKE, "unable to resolve %s, retrying in %ds",
1285 addr, this->retry_initiate_interval);
1286 defer_initiate = TRUE;
1287 }
1288
1289 set_condition(this, COND_ORIGINAL_INITIATOR, TRUE);
1290 this->task_manager->queue_ike(this->task_manager);
1291 }
1292
1293 #ifdef ME
1294 if (this->peer_cfg->is_mediation(this->peer_cfg))
1295 {
1296 if (this->state == IKE_ESTABLISHED)
1297 {
1298 /* mediation connection is already established, retrigger state
1299 * change to notify bus listeners */
1300 DBG1(DBG_IKE, "mediation connection is already up");
1301 set_state(this, IKE_ESTABLISHED);
1302 }
1303 DESTROY_IF(child_cfg);
1304 }
1305 else
1306 #endif /* ME */
1307 if (child_cfg)
1308 {
1309 /* normal IKE_SA with CHILD_SA */
1310 this->task_manager->queue_child(this->task_manager, child_cfg, reqid,
1311 tsi, tsr);
1312 #ifdef ME
1313 if (this->peer_cfg->get_mediated_by(this->peer_cfg))
1314 {
1315 /* mediated connection, initiate mediation process */
1316 job_t *job = (job_t*)initiate_mediation_job_create(this->ike_sa_id);
1317 lib->processor->queue_job(lib->processor, job);
1318 return SUCCESS;
1319 }
1320 #endif /* ME */
1321 }
1322
1323 if (defer_initiate)
1324 {
1325 if (!this->retry_initiate_queued)
1326 {
1327 job_t *job = (job_t*)retry_initiate_job_create(this->ike_sa_id);
1328 lib->scheduler->schedule_job(lib->scheduler, (job_t*)job,
1329 this->retry_initiate_interval);
1330 this->retry_initiate_queued = TRUE;
1331 }
1332 return SUCCESS;
1333 }
1334 this->retry_initiate_queued = FALSE;
1335 return this->task_manager->initiate(this->task_manager);
1336 }
1337
1338 METHOD(ike_sa_t, retry_initiate, status_t,
1339 private_ike_sa_t *this)
1340 {
1341 if (this->retry_initiate_queued)
1342 {
1343 this->retry_initiate_queued = FALSE;
1344 return initiate(this, NULL, 0, NULL, NULL);
1345 }
1346 return SUCCESS;
1347 }
1348
1349 METHOD(ike_sa_t, process_message, status_t,
1350 private_ike_sa_t *this, message_t *message)
1351 {
1352 status_t status;
1353
1354 if (this->state == IKE_PASSIVE)
1355 { /* do not handle messages in passive state */
1356 return FAILED;
1357 }
1358 if (message->get_major_version(message) != this->version)
1359 {
1360 DBG1(DBG_IKE, "ignoring %N IKEv%u exchange on %N SA",
1361 exchange_type_names, message->get_exchange_type(message),
1362 message->get_major_version(message),
1363 ike_version_names, this->version);
1364 /* TODO-IKEv1: fall back to IKEv1 if we receive an IKEv1
1365 * INVALID_MAJOR_VERSION on an IKEv2 SA. */
1366 return FAILED;
1367 }
1368 status = this->task_manager->process_message(this->task_manager, message);
1369 if (this->flush_auth_cfg && this->state == IKE_ESTABLISHED)
1370 {
1371 /* authentication completed */
1372 this->flush_auth_cfg = FALSE;
1373 flush_auth_cfgs(this);
1374 }
1375 return status;
1376 }
1377
1378 METHOD(ike_sa_t, get_id, ike_sa_id_t*,
1379 private_ike_sa_t *this)
1380 {
1381 return this->ike_sa_id;
1382 }
1383
1384 METHOD(ike_sa_t, get_version, ike_version_t,
1385 private_ike_sa_t *this)
1386 {
1387 return this->version;
1388 }
1389
1390 METHOD(ike_sa_t, get_my_id, identification_t*,
1391 private_ike_sa_t *this)
1392 {
1393 return this->my_id;
1394 }
1395
1396 METHOD(ike_sa_t, set_my_id, void,
1397 private_ike_sa_t *this, identification_t *me)
1398 {
1399 DESTROY_IF(this->my_id);
1400 this->my_id = me;
1401 }
1402
1403 METHOD(ike_sa_t, get_other_id, identification_t*,
1404 private_ike_sa_t *this)
1405 {
1406 return this->other_id;
1407 }
1408
1409 METHOD(ike_sa_t, get_other_eap_id, identification_t*,
1410 private_ike_sa_t *this)
1411 {
1412 identification_t *id = NULL, *current;
1413 enumerator_t *enumerator;
1414 auth_cfg_t *cfg;
1415
1416 enumerator = array_create_enumerator(this->other_auths);
1417 while (enumerator->enumerate(enumerator, &cfg))
1418 {
1419 /* prefer EAP-Identity of last round */
1420 current = cfg->get(cfg, AUTH_RULE_EAP_IDENTITY);
1421 if (!current || current->get_type(current) == ID_ANY)
1422 {
1423 current = cfg->get(cfg, AUTH_RULE_XAUTH_IDENTITY);
1424 }
1425 if (!current || current->get_type(current) == ID_ANY)
1426 {
1427 current = cfg->get(cfg, AUTH_RULE_IDENTITY);
1428 }
1429 if (current && current->get_type(current) != ID_ANY)
1430 {
1431 id = current;
1432 continue;
1433 }
1434 }
1435 enumerator->destroy(enumerator);
1436 if (id)
1437 {
1438 return id;
1439 }
1440 return this->other_id;
1441 }
1442
1443 METHOD(ike_sa_t, set_other_id, void,
1444 private_ike_sa_t *this, identification_t *other)
1445 {
1446 DESTROY_IF(this->other_id);
1447 this->other_id = other;
1448 }
1449
1450 METHOD(ike_sa_t, add_child_sa, void,
1451 private_ike_sa_t *this, child_sa_t *child_sa)
1452 {
1453 array_insert_create(&this->child_sas, ARRAY_TAIL, child_sa);
1454 charon->child_sa_manager->add(charon->child_sa_manager,
1455 child_sa, &this->public);
1456 }
1457
1458 METHOD(ike_sa_t, get_child_sa, child_sa_t*,
1459 private_ike_sa_t *this, protocol_id_t protocol, u_int32_t spi, bool inbound)
1460 {
1461 enumerator_t *enumerator;
1462 child_sa_t *current, *found = NULL;
1463
1464 enumerator = array_create_enumerator(this->child_sas);
1465 while (enumerator->enumerate(enumerator, (void**)&current))
1466 {
1467 if (current->get_spi(current, inbound) == spi &&
1468 current->get_protocol(current) == protocol)
1469 {
1470 found = current;
1471 }
1472 }
1473 enumerator->destroy(enumerator);
1474 return found;
1475 }
1476
1477 METHOD(ike_sa_t, get_child_count, int,
1478 private_ike_sa_t *this)
1479 {
1480 return array_count(this->child_sas);
1481 }
1482
1483 /**
1484 * Private data of a create_child_sa_enumerator()
1485 */
1486 typedef struct {
1487 /** implements enumerator */
1488 enumerator_t public;
1489 /** inner array enumerator */
1490 enumerator_t *inner;
1491 /** current item */
1492 child_sa_t *current;
1493 } child_enumerator_t;
1494
1495 METHOD(enumerator_t, child_enumerate, bool,
1496 child_enumerator_t *this, child_sa_t **child_sa)
1497 {
1498 if (this->inner->enumerate(this->inner, &this->current))
1499 {
1500 *child_sa = this->current;
1501 return TRUE;
1502 }
1503 return FALSE;
1504 }
1505
1506 METHOD(enumerator_t, child_enumerator_destroy, void,
1507 child_enumerator_t *this)
1508 {
1509 this->inner->destroy(this->inner);
1510 free(this);
1511 }
1512
1513 METHOD(ike_sa_t, create_child_sa_enumerator, enumerator_t*,
1514 private_ike_sa_t *this)
1515 {
1516 child_enumerator_t *enumerator;
1517
1518 INIT(enumerator,
1519 .public = {
1520 .enumerate = (void*)_child_enumerate,
1521 .destroy = _child_enumerator_destroy,
1522 },
1523 .inner = array_create_enumerator(this->child_sas),
1524 );
1525 return &enumerator->public;
1526 }
1527
1528 METHOD(ike_sa_t, remove_child_sa, void,
1529 private_ike_sa_t *this, enumerator_t *enumerator)
1530 {
1531 child_enumerator_t *ce = (child_enumerator_t*)enumerator;
1532
1533 charon->child_sa_manager->remove(charon->child_sa_manager, ce->current);
1534 array_remove_at(this->child_sas, ce->inner);
1535 }
1536
1537 METHOD(ike_sa_t, rekey_child_sa, status_t,
1538 private_ike_sa_t *this, protocol_id_t protocol, u_int32_t spi)
1539 {
1540 if (this->state == IKE_PASSIVE)
1541 {
1542 return INVALID_STATE;
1543 }
1544 this->task_manager->queue_child_rekey(this->task_manager, protocol, spi);
1545 return this->task_manager->initiate(this->task_manager);
1546 }
1547
1548 METHOD(ike_sa_t, delete_child_sa, status_t,
1549 private_ike_sa_t *this, protocol_id_t protocol, u_int32_t spi, bool expired)
1550 {
1551 if (this->state == IKE_PASSIVE)
1552 {
1553 return INVALID_STATE;
1554 }
1555 this->task_manager->queue_child_delete(this->task_manager,
1556 protocol, spi, expired);
1557 return this->task_manager->initiate(this->task_manager);
1558 }
1559
1560 METHOD(ike_sa_t, destroy_child_sa, status_t,
1561 private_ike_sa_t *this, protocol_id_t protocol, u_int32_t spi)
1562 {
1563 enumerator_t *enumerator;
1564 child_sa_t *child_sa;
1565 status_t status = NOT_FOUND;
1566
1567 enumerator = create_child_sa_enumerator(this);
1568 while (enumerator->enumerate(enumerator, (void**)&child_sa))
1569 {
1570 if (child_sa->get_protocol(child_sa) == protocol &&
1571 child_sa->get_spi(child_sa, TRUE) == spi)
1572 {
1573 remove_child_sa(this, enumerator);
1574 child_sa->destroy(child_sa);
1575 status = SUCCESS;
1576 break;
1577 }
1578 }
1579 enumerator->destroy(enumerator);
1580 return status;
1581 }
1582
1583 METHOD(ike_sa_t, delete_, status_t,
1584 private_ike_sa_t *this)
1585 {
1586 switch (this->state)
1587 {
1588 case IKE_REKEYING:
1589 if (this->version == IKEV1)
1590 { /* SA has been reauthenticated, delete */
1591 charon->bus->ike_updown(charon->bus, &this->public, FALSE);
1592 break;
1593 }
1594 /* FALL */
1595 case IKE_ESTABLISHED:
1596 if (time_monotonic(NULL) >= this->stats[STAT_DELETE])
1597 { /* IKE_SA hard lifetime hit */
1598 charon->bus->alert(charon->bus, ALERT_IKE_SA_EXPIRED);
1599 }
1600 this->task_manager->queue_ike_delete(this->task_manager);
1601 return this->task_manager->initiate(this->task_manager);
1602 case IKE_CREATED:
1603 DBG1(DBG_IKE, "deleting unestablished IKE_SA");
1604 break;
1605 case IKE_PASSIVE:
1606 break;
1607 default:
1608 DBG1(DBG_IKE, "destroying IKE_SA in state %N "
1609 "without notification", ike_sa_state_names, this->state);
1610 charon->bus->ike_updown(charon->bus, &this->public, FALSE);
1611 break;
1612 }
1613 return DESTROY_ME;
1614 }
1615
1616 METHOD(ike_sa_t, rekey, status_t,
1617 private_ike_sa_t *this)
1618 {
1619 if (this->state == IKE_PASSIVE)
1620 {
1621 return INVALID_STATE;
1622 }
1623 this->task_manager->queue_ike_rekey(this->task_manager);
1624 return this->task_manager->initiate(this->task_manager);
1625 }
1626
1627 METHOD(ike_sa_t, reauth, status_t,
1628 private_ike_sa_t *this)
1629 {
1630 if (this->state == IKE_PASSIVE)
1631 {
1632 return INVALID_STATE;
1633 }
1634 if (this->state == IKE_CONNECTING)
1635 {
1636 DBG0(DBG_IKE, "reinitiating IKE_SA %s[%d]",
1637 get_name(this), this->unique_id);
1638 reset(this);
1639 this->task_manager->queue_ike(this->task_manager);
1640 return this->task_manager->initiate(this->task_manager);
1641 }
1642 /* we can't reauthenticate as responder when we use EAP or virtual IPs.
1643 * If the peer does not support RFC4478, there is no way to keep the
1644 * IKE_SA up. */
1645 if (!has_condition(this, COND_ORIGINAL_INITIATOR))
1646 {
1647 DBG1(DBG_IKE, "initiator did not reauthenticate as requested");
1648 if (array_count(this->other_vips) != 0 ||
1649 has_condition(this, COND_XAUTH_AUTHENTICATED) ||
1650 has_condition(this, COND_EAP_AUTHENTICATED)
1651 #ifdef ME
1652 /* as mediation server we too cannot reauth the IKE_SA */
1653 || this->is_mediation_server
1654 #endif /* ME */
1655 )
1656 {
1657 time_t del, now;
1658
1659 del = this->stats[STAT_DELETE];
1660 now = time_monotonic(NULL);
1661 DBG1(DBG_IKE, "IKE_SA %s[%d] will timeout in %V",
1662 get_name(this), this->unique_id, &now, &del);
1663 return FAILED;
1664 }
1665 else
1666 {
1667 DBG0(DBG_IKE, "reauthenticating IKE_SA %s[%d] actively",
1668 get_name(this), this->unique_id);
1669 }
1670 }
1671 else
1672 {
1673 DBG0(DBG_IKE, "reauthenticating IKE_SA %s[%d]",
1674 get_name(this), this->unique_id);
1675 }
1676 set_condition(this, COND_REAUTHENTICATING, TRUE);
1677 this->task_manager->queue_ike_reauth(this->task_manager);
1678 return this->task_manager->initiate(this->task_manager);
1679 }
1680
1681 /**
1682 * Check if tasks to create CHILD_SAs are queued in the given queue
1683 */
1684 static bool is_child_queued(private_ike_sa_t *this, task_queue_t queue)
1685 {
1686 enumerator_t *enumerator;
1687 task_t *task;
1688 bool found = FALSE;
1689
1690 enumerator = this->task_manager->create_task_enumerator(this->task_manager,
1691 queue);
1692 while (enumerator->enumerate(enumerator, &task))
1693 {
1694 if (task->get_type(task) == TASK_CHILD_CREATE ||
1695 task->get_type(task) == TASK_QUICK_MODE)
1696 {
1697 found = TRUE;
1698 break;
1699 }
1700 }
1701 enumerator->destroy(enumerator);
1702 return found;
1703 }
1704
1705 METHOD(ike_sa_t, reestablish, status_t,
1706 private_ike_sa_t *this)
1707 {
1708 ike_sa_t *new;
1709 host_t *host;
1710 action_t action;
1711 enumerator_t *enumerator;
1712 child_sa_t *child_sa;
1713 child_cfg_t *child_cfg;
1714 bool restart = FALSE;
1715 status_t status = FAILED;
1716
1717 if (has_condition(this, COND_REAUTHENTICATING))
1718 { /* only reauthenticate if we have children */
1719 if (array_count(this->child_sas) == 0
1720 #ifdef ME
1721 /* allow reauth of mediation connections without CHILD_SAs */
1722 && !this->peer_cfg->is_mediation(this->peer_cfg)
1723 #endif /* ME */
1724 )
1725 {
1726 DBG1(DBG_IKE, "unable to reauthenticate IKE_SA, no CHILD_SA "
1727 "to recreate");
1728 }
1729 else
1730 {
1731 restart = TRUE;
1732 }
1733 }
1734 else
1735 { /* check if we have children to keep up at all */
1736 enumerator = array_create_enumerator(this->child_sas);
1737 while (enumerator->enumerate(enumerator, (void**)&child_sa))
1738 {
1739 if (this->state == IKE_DELETING)
1740 {
1741 action = child_sa->get_close_action(child_sa);
1742 }
1743 else
1744 {
1745 action = child_sa->get_dpd_action(child_sa);
1746 }
1747 switch (action)
1748 {
1749 case ACTION_RESTART:
1750 restart = TRUE;
1751 break;
1752 case ACTION_ROUTE:
1753 charon->traps->install(charon->traps, this->peer_cfg,
1754 child_sa->get_config(child_sa),
1755 child_sa->get_reqid(child_sa));
1756 break;
1757 default:
1758 break;
1759 }
1760 }
1761 enumerator->destroy(enumerator);
1762 /* check if we have tasks that recreate children */
1763 if (!restart)
1764 {
1765 restart = is_child_queued(this, TASK_QUEUE_ACTIVE) ||
1766 is_child_queued(this, TASK_QUEUE_QUEUED);
1767 }
1768 #ifdef ME
1769 /* mediation connections have no children, keep them up anyway */
1770 if (this->peer_cfg->is_mediation(this->peer_cfg))
1771 {
1772 restart = TRUE;
1773 }
1774 #endif /* ME */
1775 }
1776 if (!restart)
1777 {
1778 return FAILED;
1779 }
1780
1781 /* check if we are able to reestablish this IKE_SA */
1782 if (!has_condition(this, COND_ORIGINAL_INITIATOR) &&
1783 (array_count(this->other_vips) != 0 ||
1784 has_condition(this, COND_EAP_AUTHENTICATED)
1785 #ifdef ME
1786 || this->is_mediation_server
1787 #endif /* ME */
1788 ))
1789 {
1790 DBG1(DBG_IKE, "unable to reestablish IKE_SA due to asymmetric setup");
1791 return FAILED;
1792 }
1793
1794 new = charon->ike_sa_manager->checkout_new(charon->ike_sa_manager,
1795 this->version, TRUE);
1796 if (!new)
1797 {
1798 return FAILED;
1799 }
1800 new->set_peer_cfg(new, this->peer_cfg);
1801 host = this->other_host;
1802 new->set_other_host(new, host->clone(host));
1803 host = this->my_host;
1804 new->set_my_host(new, host->clone(host));
1805 charon->bus->ike_reestablish_pre(charon->bus, &this->public, new);
1806 /* resolve hosts but use the old addresses above as fallback */
1807 resolve_hosts((private_ike_sa_t*)new);
1808 /* if we already have a virtual IP, we reuse it */
1809 enumerator = array_create_enumerator(this->my_vips);
1810 while (enumerator->enumerate(enumerator, &host))
1811 {
1812 new->add_virtual_ip(new, TRUE, host);
1813 }
1814 enumerator->destroy(enumerator);
1815
1816 #ifdef ME
1817 if (this->peer_cfg->is_mediation(this->peer_cfg))
1818 {
1819 status = new->initiate(new, NULL, 0, NULL, NULL);
1820 }
1821 else
1822 #endif /* ME */
1823 {
1824 /* handle existing CHILD_SAs */
1825 enumerator = create_child_sa_enumerator(this);
1826 while (enumerator->enumerate(enumerator, (void**)&child_sa))
1827 {
1828 if (has_condition(this, COND_REAUTHENTICATING))
1829 {
1830 switch (child_sa->get_state(child_sa))
1831 {
1832 case CHILD_ROUTED:
1833 { /* move routed child directly */
1834 remove_child_sa(this, enumerator);
1835 new->add_child_sa(new, child_sa);
1836 action = ACTION_NONE;
1837 break;
1838 }
1839 default:
1840 { /* initiate/queue all other CHILD_SAs */
1841 action = ACTION_RESTART;
1842 break;
1843 }
1844 }
1845 }
1846 else
1847 { /* only restart CHILD_SAs that are configured accordingly */
1848 if (this->state == IKE_DELETING)
1849 {
1850 action = child_sa->get_close_action(child_sa);
1851 }
1852 else
1853 {
1854 action = child_sa->get_dpd_action(child_sa);
1855 }
1856 }
1857 switch (action)
1858 {
1859 case ACTION_RESTART:
1860 child_cfg = child_sa->get_config(child_sa);
1861 DBG1(DBG_IKE, "restarting CHILD_SA %s",
1862 child_cfg->get_name(child_cfg));
1863 child_cfg->get_ref(child_cfg);
1864 status = new->initiate(new, child_cfg,
1865 child_sa->get_reqid(child_sa), NULL, NULL);
1866 break;
1867 default:
1868 continue;
1869 }
1870 if (status == DESTROY_ME)
1871 {
1872 break;
1873 }
1874 }
1875 enumerator->destroy(enumerator);
1876 /* adopt any active or queued CHILD-creating tasks */
1877 if (status != DESTROY_ME)
1878 {
1879 task_manager_t *other_tasks = ((private_ike_sa_t*)new)->task_manager;
1880 other_tasks->adopt_child_tasks(other_tasks, this->task_manager);
1881 if (new->get_state(new) == IKE_CREATED)
1882 {
1883 status = new->initiate(new, NULL, 0, NULL, NULL);
1884 }
1885 }
1886 }
1887
1888 if (status == DESTROY_ME)
1889 {
1890 charon->bus->ike_reestablish_post(charon->bus, &this->public, new,
1891 FALSE);
1892 charon->ike_sa_manager->checkin_and_destroy(charon->ike_sa_manager, new);
1893 status = FAILED;
1894 }
1895 else
1896 {
1897 charon->bus->ike_reestablish_post(charon->bus, &this->public, new,
1898 TRUE);
1899 charon->ike_sa_manager->checkin(charon->ike_sa_manager, new);
1900 status = SUCCESS;
1901 }
1902 charon->bus->set_sa(charon->bus, &this->public);
1903 return status;
1904 }
1905
1906 METHOD(ike_sa_t, retransmit, status_t,
1907 private_ike_sa_t *this, u_int32_t message_id)
1908 {
1909 if (this->state == IKE_PASSIVE)
1910 {
1911 return INVALID_STATE;
1912 }
1913 this->stats[STAT_OUTBOUND] = time_monotonic(NULL);
1914 if (this->task_manager->retransmit(this->task_manager, message_id) != SUCCESS)
1915 {
1916 /* send a proper signal to brief interested bus listeners */
1917 switch (this->state)
1918 {
1919 case IKE_CONNECTING:
1920 {
1921 /* retry IKE_SA_INIT/Main Mode if we have multiple keyingtries */
1922 u_int32_t tries = this->peer_cfg->get_keyingtries(this->peer_cfg);
1923 charon->bus->alert(charon->bus, ALERT_PEER_INIT_UNREACHABLE,
1924 this->keyingtry);
1925 this->keyingtry++;
1926 if (tries == 0 || tries > this->keyingtry)
1927 {
1928 DBG1(DBG_IKE, "peer not responding, trying again (%d/%d)",
1929 this->keyingtry + 1, tries);
1930 reset(this);
1931 resolve_hosts(this);
1932 this->task_manager->queue_ike(this->task_manager);
1933 return this->task_manager->initiate(this->task_manager);
1934 }
1935 DBG1(DBG_IKE, "establishing IKE_SA failed, peer not responding");
1936 break;
1937 }
1938 case IKE_DELETING:
1939 DBG1(DBG_IKE, "proper IKE_SA delete failed, peer not responding");
1940 if (has_condition(this, COND_REAUTHENTICATING))
1941 {
1942 DBG1(DBG_IKE, "delete during reauthentication failed, "
1943 "trying to reestablish IKE_SA anyway");
1944 reestablish(this);
1945 }
1946 break;
1947 case IKE_REKEYING:
1948 DBG1(DBG_IKE, "rekeying IKE_SA failed, peer not responding");
1949 /* FALL */
1950 default:
1951 reestablish(this);
1952 break;
1953 }
1954 if (this->state != IKE_CONNECTING)
1955 {
1956 charon->bus->ike_updown(charon->bus, &this->public, FALSE);
1957 }
1958 return DESTROY_ME;
1959 }
1960 return SUCCESS;
1961 }
1962
1963 METHOD(ike_sa_t, set_auth_lifetime, status_t,
1964 private_ike_sa_t *this, u_int32_t lifetime)
1965 {
1966 u_int32_t diff, hard, soft, now;
1967 bool send_update;
1968
1969 diff = this->peer_cfg->get_over_time(this->peer_cfg);
1970 now = time_monotonic(NULL);
1971 hard = now + lifetime;
1972 soft = hard - diff;
1973
1974 /* check if we have to send an AUTH_LIFETIME to enforce the new lifetime.
1975 * We send the notify in IKE_AUTH if not yet ESTABLISHED. */
1976 send_update = this->state == IKE_ESTABLISHED && this->version == IKEV2 &&
1977 !has_condition(this, COND_ORIGINAL_INITIATOR) &&
1978 (array_count(this->other_vips) != 0 ||
1979 has_condition(this, COND_EAP_AUTHENTICATED));
1980
1981 if (lifetime < diff)
1982 {
1983 this->stats[STAT_REAUTH] = now;
1984
1985 if (!send_update)
1986 {
1987 DBG1(DBG_IKE, "received AUTH_LIFETIME of %ds, "
1988 "starting reauthentication", lifetime);
1989 lib->processor->queue_job(lib->processor,
1990 (job_t*)rekey_ike_sa_job_create(this->ike_sa_id, TRUE));
1991 }
1992 }
1993 else if (this->stats[STAT_REAUTH] == 0 ||
1994 this->stats[STAT_REAUTH] > soft)
1995 {
1996 this->stats[STAT_REAUTH] = soft;
1997 if (!send_update)
1998 {
1999 DBG1(DBG_IKE, "received AUTH_LIFETIME of %ds, scheduling "
2000 "reauthentication in %ds", lifetime, lifetime - diff);
2001 lib->scheduler->schedule_job(lib->scheduler,
2002 (job_t*)rekey_ike_sa_job_create(this->ike_sa_id, TRUE),
2003 lifetime - diff);
2004 }
2005 }
2006 else
2007 {
2008 DBG1(DBG_IKE, "received AUTH_LIFETIME of %ds, "
2009 "reauthentication already scheduled in %ds", lifetime,
2010 this->stats[STAT_REAUTH] - time_monotonic(NULL));
2011 send_update = FALSE;
2012 }
2013 /* give at least some seconds to reauthenticate */
2014 this->stats[STAT_DELETE] = max(hard, now + 10);
2015
2016 #ifdef USE_IKEV2
2017 if (send_update)
2018 {
2019 ike_auth_lifetime_t *task;
2020
2021 task = ike_auth_lifetime_create(&this->public, TRUE);
2022 this->task_manager->queue_task(this->task_manager, &task->task);
2023 return this->task_manager->initiate(this->task_manager);
2024 }
2025 #endif
2026 return SUCCESS;
2027 }
2028
2029 /**
2030 * Check if the current combination of source and destination address is still
2031 * valid.
2032 */
2033 static bool is_current_path_valid(private_ike_sa_t *this)
2034 {
2035 bool valid = FALSE;
2036 host_t *src;
2037 src = hydra->kernel_interface->get_source_addr(hydra->kernel_interface,
2038 this->other_host, this->my_host);
2039 if (src)
2040 {
2041 if (src->ip_equals(src, this->my_host))
2042 {
2043 valid = TRUE;
2044 }
2045 src->destroy(src);
2046 }
2047 return valid;
2048 }
2049
2050 /**
2051 * Check if we have any path avialable for this IKE SA.
2052 */
2053 static bool is_any_path_valid(private_ike_sa_t *this)
2054 {
2055 bool valid = FALSE;
2056 enumerator_t *enumerator;
2057 host_t *src = NULL, *addr;
2058 int family = AF_UNSPEC;
2059
2060 switch (charon->socket->supported_families(charon->socket))
2061 {
2062 case SOCKET_FAMILY_IPV4:
2063 family = AF_INET;
2064 break;
2065 case SOCKET_FAMILY_IPV6:
2066 family = AF_INET6;
2067 break;
2068 case SOCKET_FAMILY_BOTH:
2069 case SOCKET_FAMILY_NONE:
2070 break;
2071 }
2072
2073 DBG1(DBG_IKE, "old path is not available anymore, try to find another");
2074 enumerator = create_peer_address_enumerator(this);
2075 while (enumerator->enumerate(enumerator, &addr))
2076 {
2077 if (family != AF_UNSPEC && addr->get_family(addr) != family)
2078 {
2079 continue;
2080 }
2081 DBG1(DBG_IKE, "looking for a route to %H ...", addr);
2082 src = hydra->kernel_interface->get_source_addr(
2083 hydra->kernel_interface, addr, NULL);
2084 if (src)
2085 {
2086 break;
2087 }
2088 }
2089 enumerator->destroy(enumerator);
2090 if (src)
2091 {
2092 valid = TRUE;
2093 src->destroy(src);
2094 }
2095 return valid;
2096 }
2097
2098 METHOD(ike_sa_t, roam, status_t,
2099 private_ike_sa_t *this, bool address)
2100 {
2101 switch (this->state)
2102 {
2103 case IKE_CREATED:
2104 case IKE_DELETING:
2105 case IKE_DESTROYING:
2106 case IKE_PASSIVE:
2107 return SUCCESS;
2108 default:
2109 break;
2110 }
2111
2112 /* keep existing path if possible */
2113 if (is_current_path_valid(this))
2114 {
2115 DBG2(DBG_IKE, "keeping connection path %H - %H",
2116 this->my_host, this->other_host);
2117 set_condition(this, COND_STALE, FALSE);
2118
2119 if (supports_extension(this, EXT_MOBIKE) && address)
2120 { /* if any addresses changed, send an updated list */
2121 DBG1(DBG_IKE, "sending address list update using MOBIKE");
2122 this->task_manager->queue_mobike(this->task_manager, FALSE, TRUE);
2123 return this->task_manager->initiate(this->task_manager);
2124 }
2125 return SUCCESS;
2126 }
2127
2128 if (!is_any_path_valid(this))
2129 {
2130 DBG1(DBG_IKE, "no route found to reach %H, MOBIKE update deferred",
2131 this->other_host);
2132 set_condition(this, COND_STALE, TRUE);
2133 return SUCCESS;
2134 }
2135 set_condition(this, COND_STALE, FALSE);
2136
2137 /* update addresses with mobike, if supported ... */
2138 if (supports_extension(this, EXT_MOBIKE))
2139 {
2140 if (!has_condition(this, COND_ORIGINAL_INITIATOR))
2141 { /* responder updates the peer about changed address config */
2142 DBG1(DBG_IKE, "sending address list update using MOBIKE, "
2143 "implicitly requesting an address change");
2144 address = TRUE;
2145 }
2146 else
2147 {
2148 DBG1(DBG_IKE, "requesting address change using MOBIKE");
2149 }
2150 this->task_manager->queue_mobike(this->task_manager, TRUE, address);
2151 return this->task_manager->initiate(this->task_manager);
2152 }
2153
2154 /* ... reauth if not */
2155 if (!has_condition(this, COND_ORIGINAL_INITIATOR))
2156 { /* responder does not reauthenticate */
2157 set_condition(this, COND_STALE, TRUE);
2158 return SUCCESS;
2159 }
2160 DBG1(DBG_IKE, "reauthenticating IKE_SA due to address change");
2161 /* since our previous path is not valid anymore, try and find a new one */
2162 resolve_hosts(this);
2163 return reauth(this);
2164 }
2165
2166 METHOD(ike_sa_t, add_configuration_attribute, void,
2167 private_ike_sa_t *this, attribute_handler_t *handler,
2168 configuration_attribute_type_t type, chunk_t data)
2169 {
2170 attribute_entry_t entry = {
2171 .handler = handler,
2172 .type = type,
2173 .data = chunk_clone(data),
2174 };
2175 array_insert(this->attributes, ARRAY_TAIL, &entry);
2176 }
2177
2178 /**
2179 * Enumerator filter for attributes
2180 */
2181 static bool filter_attribute(void *null, attribute_entry_t **in,
2182 configuration_attribute_type_t *type, void *in2,
2183 chunk_t *data, void *in3, bool *handled)
2184 {
2185 *type = (*in)->type;
2186 *data = (*in)->data;
2187 *handled = (*in)->handler != NULL;
2188 return TRUE;
2189 }
2190
2191 METHOD(ike_sa_t, create_attribute_enumerator, enumerator_t*,
2192 private_ike_sa_t *this)
2193 {
2194 return enumerator_create_filter(array_create_enumerator(this->attributes),
2195 (void*)filter_attribute, NULL, NULL);
2196 }
2197
2198 METHOD(ike_sa_t, create_task_enumerator, enumerator_t*,
2199 private_ike_sa_t *this, task_queue_t queue)
2200 {
2201 return this->task_manager->create_task_enumerator(this->task_manager, queue);
2202 }
2203
2204 METHOD(ike_sa_t, flush_queue, void,
2205 private_ike_sa_t *this, task_queue_t queue)
2206 {
2207 this->task_manager->flush_queue(this->task_manager, queue);
2208 }
2209
2210 METHOD(ike_sa_t, queue_task, void,
2211 private_ike_sa_t *this, task_t *task)
2212 {
2213 this->task_manager->queue_task(this->task_manager, task);
2214 }
2215
2216 METHOD(ike_sa_t, inherit_pre, void,
2217 private_ike_sa_t *this, ike_sa_t *other_public)
2218 {
2219 private_ike_sa_t *other = (private_ike_sa_t*)other_public;
2220
2221 /* apply config and hosts */
2222 set_peer_cfg(this, other->peer_cfg);
2223 set_my_host(this, other->my_host->clone(other->my_host));
2224 set_other_host(this, other->other_host->clone(other->other_host));
2225
2226 /* apply extensions and conditions with a few exceptions */
2227 this->extensions = other->extensions;
2228 this->conditions = other->conditions;
2229 this->conditions &= ~COND_STALE;
2230 this->conditions &= ~COND_REAUTHENTICATING;
2231 }
2232
2233 METHOD(ike_sa_t, inherit_post, void,
2234 private_ike_sa_t *this, ike_sa_t *other_public)
2235 {
2236 private_ike_sa_t *other = (private_ike_sa_t*)other_public;
2237 child_sa_t *child_sa;
2238 enumerator_t *enumerator;
2239 attribute_entry_t entry;
2240 auth_cfg_t *cfg;
2241 host_t *vip;
2242
2243 /* apply hosts and ids */
2244 this->my_host->destroy(this->my_host);
2245 this->other_host->destroy(this->other_host);
2246 this->my_id->destroy(this->my_id);
2247 this->other_id->destroy(this->other_id);
2248 this->my_host = other->my_host->clone(other->my_host);
2249 this->other_host = other->other_host->clone(other->other_host);
2250 this->my_id = other->my_id->clone(other->my_id);
2251 this->other_id = other->other_id->clone(other->other_id);
2252
2253 /* apply assigned virtual IPs... */
2254 while (array_remove(other->my_vips, ARRAY_HEAD, &vip))
2255 {
2256 array_insert_create(&this->my_vips, ARRAY_TAIL, vip);
2257 }
2258 while (array_remove(other->other_vips, ARRAY_HEAD, &vip))
2259 {
2260 array_insert_create(&this->other_vips, ARRAY_TAIL, vip);
2261 }
2262
2263 /* authentication information */
2264 enumerator = array_create_enumerator(other->my_auths);
2265 while (enumerator->enumerate(enumerator, &cfg))
2266 {
2267 array_insert(this->my_auths, ARRAY_TAIL, cfg->clone(cfg));
2268 }
2269 enumerator->destroy(enumerator);
2270 enumerator = array_create_enumerator(other->other_auths);
2271 while (enumerator->enumerate(enumerator, &cfg))
2272 {
2273 array_insert(this->other_auths, ARRAY_TAIL, cfg->clone(cfg));
2274 }
2275 enumerator->destroy(enumerator);
2276
2277 /* ... and configuration attributes */
2278 while (array_remove(other->attributes, ARRAY_HEAD, &entry))
2279 {
2280 array_insert(this->attributes, ARRAY_TAIL, &entry);
2281 }
2282
2283 /* inherit all conditions */
2284 this->conditions = other->conditions;
2285 if (this->conditions & COND_NAT_HERE)
2286 {
2287 send_keepalive(this);
2288 }
2289
2290 #ifdef ME
2291 if (other->is_mediation_server)
2292 {
2293 act_as_mediation_server(this);
2294 }
2295 else if (other->server_reflexive_host)
2296 {
2297 this->server_reflexive_host = other->server_reflexive_host->clone(
2298 other->server_reflexive_host);
2299 }
2300 #endif /* ME */
2301
2302 /* adopt all children */
2303 while (array_remove(other->child_sas, ARRAY_HEAD, &child_sa))
2304 {
2305 charon->child_sa_manager->remove(charon->child_sa_manager, child_sa);
2306 add_child_sa(this, child_sa);
2307 }
2308
2309 /* move pending tasks to the new IKE_SA */
2310 this->task_manager->adopt_tasks(this->task_manager, other->task_manager);
2311
2312 /* reauthentication timeout survives a rekeying */
2313 if (other->stats[STAT_REAUTH])
2314 {
2315 time_t reauth, delete, now = time_monotonic(NULL);
2316
2317 this->stats[STAT_REAUTH] = other->stats[STAT_REAUTH];
2318 reauth = this->stats[STAT_REAUTH] - now;
2319 delete = reauth + this->peer_cfg->get_over_time(this->peer_cfg);
2320 this->stats[STAT_DELETE] = this->stats[STAT_REAUTH] + delete;
2321 DBG1(DBG_IKE, "rescheduling reauthentication in %ds after rekeying, "
2322 "lifetime reduced to %ds", reauth, delete);
2323 lib->scheduler->schedule_job(lib->scheduler,
2324 (job_t*)rekey_ike_sa_job_create(this->ike_sa_id, TRUE), reauth);
2325 lib->scheduler->schedule_job(lib->scheduler,
2326 (job_t*)delete_ike_sa_job_create(this->ike_sa_id, TRUE), delete);
2327 }
2328 }
2329
2330 METHOD(ike_sa_t, destroy, void,
2331 private_ike_sa_t *this)
2332 {
2333 attribute_entry_t entry;
2334 child_sa_t *child_sa;
2335 host_t *vip;
2336
2337 charon->bus->set_sa(charon->bus, &this->public);
2338
2339 set_state(this, IKE_DESTROYING);
2340 if (this->task_manager)
2341 {
2342 this->task_manager->flush(this->task_manager);
2343 }
2344
2345 /* remove attributes first, as we pass the IKE_SA to the handler */
2346 charon->bus->handle_vips(charon->bus, &this->public, FALSE);
2347 while (array_remove(this->attributes, ARRAY_TAIL, &entry))
2348 {
2349 if (entry.handler)
2350 {
2351 charon->attributes->release(charon->attributes, entry.handler,
2352 &this->public, entry.type, entry.data);
2353 }
2354 free(entry.data.ptr);
2355 }
2356 /* uninstall CHILD_SAs before virtual IPs, otherwise we might kill
2357 * routes that the CHILD_SA tries to uninstall. */
2358 while (array_remove(this->child_sas, ARRAY_TAIL, &child_sa))
2359 {
2360 charon->child_sa_manager->remove(charon->child_sa_manager, child_sa);
2361 child_sa->destroy(child_sa);
2362 }
2363 while (array_remove(this->my_vips, ARRAY_TAIL, &vip))
2364 {
2365 hydra->kernel_interface->del_ip(hydra->kernel_interface, vip, -1, TRUE);
2366 vip->destroy(vip);
2367 }
2368 if (array_count(this->other_vips))
2369 {
2370 charon->bus->assign_vips(charon->bus, &this->public, FALSE);
2371 }
2372 while (array_remove(this->other_vips, ARRAY_TAIL, &vip))
2373 {
2374 if (this->peer_cfg)
2375 {
2376 linked_list_t *pools;
2377
2378 pools = linked_list_create_from_enumerator(
2379 this->peer_cfg->create_pool_enumerator(this->peer_cfg));
2380 charon->attributes->release_address(charon->attributes,
2381 pools, vip, &this->public);
2382 pools->destroy(pools);
2383 }
2384 vip->destroy(vip);
2385 }
2386
2387 /* unset SA after here to avoid usage by the listeners */
2388 charon->bus->set_sa(charon->bus, NULL);
2389
2390 array_destroy(this->child_sas);
2391 DESTROY_IF(this->task_manager);
2392 DESTROY_IF(this->keymat);
2393 array_destroy(this->attributes);
2394 array_destroy(this->my_vips);
2395 array_destroy(this->other_vips);
2396 array_destroy_offset(this->peer_addresses, offsetof(host_t, destroy));
2397 #ifdef ME
2398 if (this->is_mediation_server)
2399 {
2400 charon->mediation_manager->remove(charon->mediation_manager,
2401 this->ike_sa_id);
2402 }
2403 DESTROY_IF(this->server_reflexive_host);
2404 chunk_free(&this->connect_id);
2405 #endif /* ME */
2406 free(this->nat_detection_dest.ptr);
2407
2408 DESTROY_IF(this->my_host);
2409 DESTROY_IF(this->other_host);
2410 DESTROY_IF(this->my_id);
2411 DESTROY_IF(this->other_id);
2412 DESTROY_IF(this->local_host);
2413 DESTROY_IF(this->remote_host);
2414
2415 DESTROY_IF(this->ike_cfg);
2416 DESTROY_IF(this->peer_cfg);
2417 DESTROY_IF(this->proposal);
2418 this->my_auth->destroy(this->my_auth);
2419 this->other_auth->destroy(this->other_auth);
2420 array_destroy_offset(this->my_auths, offsetof(auth_cfg_t, destroy));
2421 array_destroy_offset(this->other_auths, offsetof(auth_cfg_t, destroy));
2422
2423 this->ike_sa_id->destroy(this->ike_sa_id);
2424 free(this);
2425 }
2426
2427 /*
2428 * Described in header.
2429 */
2430 ike_sa_t * ike_sa_create(ike_sa_id_t *ike_sa_id, bool initiator,
2431 ike_version_t version)
2432 {
2433 private_ike_sa_t *this;
2434 static refcount_t unique_id = 0;
2435
2436 if (version == IKE_ANY)
2437 { /* prefer IKEv2 if protocol not specified */
2438 #ifdef USE_IKEV2
2439 version = IKEV2;
2440 #else
2441 version = IKEV1;
2442 #endif
2443 }
2444
2445 INIT(this,
2446 .public = {
2447 .get_version = _get_version,
2448 .get_state = _get_state,
2449 .set_state = _set_state,
2450 .get_name = _get_name,
2451 .get_statistic = _get_statistic,
2452 .set_statistic = _set_statistic,
2453 .process_message = _process_message,
2454 .initiate = _initiate,
2455 .retry_initiate = _retry_initiate,
2456 .get_ike_cfg = _get_ike_cfg,
2457 .set_ike_cfg = _set_ike_cfg,
2458 .get_peer_cfg = _get_peer_cfg,
2459 .set_peer_cfg = _set_peer_cfg,
2460 .get_auth_cfg = _get_auth_cfg,
2461 .create_auth_cfg_enumerator = _create_auth_cfg_enumerator,
2462 .add_auth_cfg = _add_auth_cfg,
2463 .get_proposal = _get_proposal,
2464 .set_proposal = _set_proposal,
2465 .get_id = _get_id,
2466 .get_my_host = _get_my_host,
2467 .set_my_host = _set_my_host,
2468 .get_other_host = _get_other_host,
2469 .set_other_host = _set_other_host,
2470 .set_message_id = _set_message_id,
2471 .float_ports = _float_ports,
2472 .update_hosts = _update_hosts,
2473 .get_my_id = _get_my_id,
2474 .set_my_id = _set_my_id,
2475 .get_other_id = _get_other_id,
2476 .set_other_id = _set_other_id,
2477 .get_other_eap_id = _get_other_eap_id,
2478 .enable_extension = _enable_extension,
2479 .supports_extension = _supports_extension,
2480 .set_condition = _set_condition,
2481 .has_condition = _has_condition,
2482 .set_pending_updates = _set_pending_updates,
2483 .get_pending_updates = _get_pending_updates,
2484 .create_peer_address_enumerator = _create_peer_address_enumerator,
2485 .add_peer_address = _add_peer_address,
2486 .clear_peer_addresses = _clear_peer_addresses,
2487 .has_mapping_changed = _has_mapping_changed,
2488 .retransmit = _retransmit,
2489 .delete = _delete_,
2490 .destroy = _destroy,
2491 .send_dpd = _send_dpd,
2492 .send_keepalive = _send_keepalive,
2493 .get_keymat = _get_keymat,
2494 .add_child_sa = _add_child_sa,
2495 .get_child_sa = _get_child_sa,
2496 .get_child_count = _get_child_count,
2497 .create_child_sa_enumerator = _create_child_sa_enumerator,
2498 .remove_child_sa = _remove_child_sa,
2499 .rekey_child_sa = _rekey_child_sa,
2500 .delete_child_sa = _delete_child_sa,
2501 .destroy_child_sa = _destroy_child_sa,
2502 .rekey = _rekey,
2503 .reauth = _reauth,
2504 .reestablish = _reestablish,
2505 .set_auth_lifetime = _set_auth_lifetime,
2506 .roam = _roam,
2507 .inherit_pre = _inherit_pre,
2508 .inherit_post = _inherit_post,
2509 .generate_message = _generate_message,
2510 .generate_message_fragmented = _generate_message_fragmented,
2511 .reset = _reset,
2512 .get_unique_id = _get_unique_id,
2513 .add_virtual_ip = _add_virtual_ip,
2514 .clear_virtual_ips = _clear_virtual_ips,
2515 .create_virtual_ip_enumerator = _create_virtual_ip_enumerator,
2516 .add_configuration_attribute = _add_configuration_attribute,
2517 .create_attribute_enumerator = _create_attribute_enumerator,
2518 .set_kmaddress = _set_kmaddress,
2519 .create_task_enumerator = _create_task_enumerator,
2520 .flush_queue = _flush_queue,
2521 .queue_task = _queue_task,
2522 #ifdef ME
2523 .act_as_mediation_server = _act_as_mediation_server,
2524 .get_server_reflexive_host = _get_server_reflexive_host,
2525 .set_server_reflexive_host = _set_server_reflexive_host,
2526 .get_connect_id = _get_connect_id,
2527 .initiate_mediation = _initiate_mediation,
2528 .initiate_mediated = _initiate_mediated,
2529 .relay = _relay,
2530 .callback = _callback,
2531 .respond = _respond,
2532 #endif /* ME */
2533 },
2534 .ike_sa_id = ike_sa_id->clone(ike_sa_id),
2535 .version = version,
2536 .my_host = host_create_any(AF_INET),
2537 .other_host = host_create_any(AF_INET),
2538 .my_id = identification_create_from_encoding(ID_ANY, chunk_empty),
2539 .other_id = identification_create_from_encoding(ID_ANY, chunk_empty),
2540 .keymat = keymat_create(version, initiator),
2541 .state = IKE_CREATED,
2542 .stats[STAT_INBOUND] = time_monotonic(NULL),
2543 .stats[STAT_OUTBOUND] = time_monotonic(NULL),
2544 .my_auth = auth_cfg_create(),
2545 .other_auth = auth_cfg_create(),
2546 .my_auths = array_create(0, 0),
2547 .other_auths = array_create(0, 0),
2548 .attributes = array_create(sizeof(attribute_entry_t), 0),
2549 .unique_id = ref_get(&unique_id),
2550 .keepalive_interval = lib->settings->get_time(lib->settings,
2551 "%s.keep_alive", KEEPALIVE_INTERVAL, lib->ns),
2552 .retry_initiate_interval = lib->settings->get_time(lib->settings,
2553 "%s.retry_initiate_interval", 0, lib->ns),
2554 .flush_auth_cfg = lib->settings->get_bool(lib->settings,
2555 "%s.flush_auth_cfg", FALSE, lib->ns),
2556 .fragment_size = lib->settings->get_int(lib->settings,
2557 "%s.fragment_size", 0, lib->ns),
2558 );
2559
2560 if (version == IKEV2)
2561 { /* always supported with IKEv2 */
2562 enable_extension(this, EXT_DPD);
2563 }
2564
2565 this->task_manager = task_manager_create(&this->public);
2566 this->my_host->set_port(this->my_host,
2567 charon->socket->get_port(charon->socket, FALSE));
2568
2569 if (!this->task_manager || !this->keymat)
2570 {
2571 DBG1(DBG_IKE, "IKE version %d not supported", this->version);
2572 destroy(this);
2573 return NULL;
2574 }
2575 return &this->public;
2576 }