d92b9df8eef2df8969f12e68808b309f0a61cad0
[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 set_my_host(this, me->clone(me));
936 update = TRUE;
937 }
938
939 if (!other->equals(other, this->other_host) &&
940 (force || has_condition(this, COND_NAT_THERE)))
941 {
942 /* only update other's address if we are behind a static NAT,
943 * which we assume is the case if we are not initiator */
944 if (force ||
945 (!has_condition(this, COND_NAT_HERE) ||
946 !has_condition(this, COND_ORIGINAL_INITIATOR)))
947 {
948 set_other_host(this, other->clone(other));
949 update = TRUE;
950 }
951 }
952 }
953
954 /* update all associated CHILD_SAs, if required */
955 if (update)
956 {
957 enumerator_t *enumerator;
958 child_sa_t *child_sa;
959 linked_list_t *vips;
960
961 vips = linked_list_create_from_enumerator(
962 array_create_enumerator(this->my_vips));
963
964 enumerator = array_create_enumerator(this->child_sas);
965 while (enumerator->enumerate(enumerator, &child_sa))
966 {
967 if (child_sa->update(child_sa, this->my_host, this->other_host,
968 vips, has_condition(this, COND_NAT_ANY)) == NOT_SUPPORTED)
969 {
970 this->public.rekey_child_sa(&this->public,
971 child_sa->get_protocol(child_sa),
972 child_sa->get_spi(child_sa, TRUE));
973 }
974 }
975 enumerator->destroy(enumerator);
976
977 vips->destroy(vips);
978 }
979 }
980
981 /**
982 * Set configured DSCP value on packet
983 */
984 static void set_dscp(private_ike_sa_t *this, packet_t *packet)
985 {
986 ike_cfg_t *ike_cfg;
987
988 /* prefer IKE config on peer_cfg, as its selection is more accurate
989 * then the initial IKE config */
990 if (this->peer_cfg)
991 {
992 ike_cfg = this->peer_cfg->get_ike_cfg(this->peer_cfg);
993 }
994 else
995 {
996 ike_cfg = this->ike_cfg;
997 }
998 if (ike_cfg)
999 {
1000 packet->set_dscp(packet, ike_cfg->get_dscp(ike_cfg));
1001 }
1002 }
1003
1004 METHOD(ike_sa_t, generate_message, status_t,
1005 private_ike_sa_t *this, message_t *message, packet_t **packet)
1006 {
1007 status_t status;
1008
1009 if (message->is_encoded(message))
1010 { /* already encoded in task, but set DSCP value */
1011 *packet = message->get_packet(message);
1012 set_dscp(this, *packet);
1013 return SUCCESS;
1014 }
1015 this->stats[STAT_OUTBOUND] = time_monotonic(NULL);
1016 message->set_ike_sa_id(message, this->ike_sa_id);
1017 charon->bus->message(charon->bus, message, FALSE, TRUE);
1018 status = message->generate(message, this->keymat, packet);
1019 if (status == SUCCESS)
1020 {
1021 set_dscp(this, *packet);
1022 charon->bus->message(charon->bus, message, FALSE, FALSE);
1023 }
1024 return status;
1025 }
1026
1027 static bool filter_fragments(private_ike_sa_t *this, packet_t **fragment,
1028 packet_t **packet)
1029 {
1030 *packet = (*fragment)->clone(*fragment);
1031 set_dscp(this, *packet);
1032 return TRUE;
1033 }
1034
1035 METHOD(ike_sa_t, generate_message_fragmented, status_t,
1036 private_ike_sa_t *this, message_t *message, enumerator_t **packets)
1037 {
1038 enumerator_t *fragments;
1039 packet_t *packet;
1040 status_t status;
1041 bool use_frags = FALSE;
1042
1043 if (this->ike_cfg)
1044 {
1045 switch (this->ike_cfg->fragmentation(this->ike_cfg))
1046 {
1047 case FRAGMENTATION_FORCE:
1048 use_frags = TRUE;
1049 break;
1050 case FRAGMENTATION_YES:
1051 use_frags = supports_extension(this, EXT_IKE_FRAGMENTATION);
1052 if (use_frags && this->version == IKEV1 &&
1053 supports_extension(this, EXT_MS_WINDOWS))
1054 {
1055 /* It seems Windows 7 and 8 peers only accept proprietary
1056 * fragmented messages if they expect certificates. */
1057 use_frags = message->get_payload(message,
1058 PLV1_CERTIFICATE) != NULL;
1059 }
1060 break;
1061 default:
1062 break;
1063 }
1064 }
1065 if (!use_frags)
1066 {
1067 status = generate_message(this, message, &packet);
1068 if (status != SUCCESS)
1069 {
1070 return status;
1071 }
1072 *packets = enumerator_create_single(packet, NULL);
1073 return SUCCESS;
1074 }
1075
1076 this->stats[STAT_OUTBOUND] = time_monotonic(NULL);
1077 message->set_ike_sa_id(message, this->ike_sa_id);
1078 charon->bus->message(charon->bus, message, FALSE, TRUE);
1079 status = message->fragment(message, this->keymat, this->fragment_size,
1080 &fragments);
1081 if (status == SUCCESS)
1082 {
1083 charon->bus->message(charon->bus, message, FALSE, FALSE);
1084 *packets = enumerator_create_filter(fragments, (void*)filter_fragments,
1085 this, NULL);
1086 }
1087 return status;
1088 }
1089
1090 METHOD(ike_sa_t, set_kmaddress, void,
1091 private_ike_sa_t *this, host_t *local, host_t *remote)
1092 {
1093 DESTROY_IF(this->local_host);
1094 DESTROY_IF(this->remote_host);
1095 this->local_host = local->clone(local);
1096 this->remote_host = remote->clone(remote);
1097 }
1098
1099 #ifdef ME
1100 METHOD(ike_sa_t, act_as_mediation_server, void,
1101 private_ike_sa_t *this)
1102 {
1103 charon->mediation_manager->update_sa_id(charon->mediation_manager,
1104 this->other_id, this->ike_sa_id);
1105 this->is_mediation_server = TRUE;
1106 }
1107
1108 METHOD(ike_sa_t, get_server_reflexive_host, host_t*,
1109 private_ike_sa_t *this)
1110 {
1111 return this->server_reflexive_host;
1112 }
1113
1114 METHOD(ike_sa_t, set_server_reflexive_host, void,
1115 private_ike_sa_t *this, host_t *host)
1116 {
1117 DESTROY_IF(this->server_reflexive_host);
1118 this->server_reflexive_host = host;
1119 }
1120
1121 METHOD(ike_sa_t, get_connect_id, chunk_t,
1122 private_ike_sa_t *this)
1123 {
1124 return this->connect_id;
1125 }
1126
1127 METHOD(ike_sa_t, respond, status_t,
1128 private_ike_sa_t *this, identification_t *peer_id, chunk_t connect_id)
1129 {
1130 ike_me_t *task = ike_me_create(&this->public, TRUE);
1131 task->respond(task, peer_id, connect_id);
1132 this->task_manager->queue_task(this->task_manager, (task_t*)task);
1133 return this->task_manager->initiate(this->task_manager);
1134 }
1135
1136 METHOD(ike_sa_t, callback, status_t,
1137 private_ike_sa_t *this, identification_t *peer_id)
1138 {
1139 ike_me_t *task = ike_me_create(&this->public, TRUE);
1140 task->callback(task, peer_id);
1141 this->task_manager->queue_task(this->task_manager, (task_t*)task);
1142 return this->task_manager->initiate(this->task_manager);
1143 }
1144
1145 METHOD(ike_sa_t, relay, status_t,
1146 private_ike_sa_t *this, identification_t *requester, chunk_t connect_id,
1147 chunk_t connect_key, linked_list_t *endpoints, bool response)
1148 {
1149 ike_me_t *task = ike_me_create(&this->public, TRUE);
1150 task->relay(task, requester, connect_id, connect_key, endpoints, response);
1151 this->task_manager->queue_task(this->task_manager, (task_t*)task);
1152 return this->task_manager->initiate(this->task_manager);
1153 }
1154
1155 METHOD(ike_sa_t, initiate_mediation, status_t,
1156 private_ike_sa_t *this, peer_cfg_t *mediated_cfg)
1157 {
1158 ike_me_t *task = ike_me_create(&this->public, TRUE);
1159 task->connect(task, mediated_cfg->get_peer_id(mediated_cfg));
1160 this->task_manager->queue_task(this->task_manager, (task_t*)task);
1161 return this->task_manager->initiate(this->task_manager);
1162 }
1163
1164 METHOD(ike_sa_t, initiate_mediated, status_t,
1165 private_ike_sa_t *this, host_t *me, host_t *other, chunk_t connect_id)
1166 {
1167 set_my_host(this, me->clone(me));
1168 set_other_host(this, other->clone(other));
1169 chunk_free(&this->connect_id);
1170 this->connect_id = chunk_clone(connect_id);
1171 return this->task_manager->initiate(this->task_manager);
1172 }
1173 #endif /* ME */
1174
1175 /**
1176 * Resolve DNS host in configuration
1177 */
1178 static void resolve_hosts(private_ike_sa_t *this)
1179 {
1180 host_t *host;
1181 int family = AF_UNSPEC;
1182
1183 switch (charon->socket->supported_families(charon->socket))
1184 {
1185 case SOCKET_FAMILY_IPV4:
1186 family = AF_INET;
1187 break;
1188 case SOCKET_FAMILY_IPV6:
1189 family = AF_INET6;
1190 break;
1191 case SOCKET_FAMILY_BOTH:
1192 case SOCKET_FAMILY_NONE:
1193 break;
1194 }
1195
1196 if (this->remote_host)
1197 {
1198 host = this->remote_host->clone(this->remote_host);
1199 host->set_port(host, IKEV2_UDP_PORT);
1200 }
1201 else
1202 {
1203 host = this->ike_cfg->resolve_other(this->ike_cfg, family);
1204 }
1205 if (host)
1206 {
1207 set_other_host(this, host);
1208 }
1209
1210 if (this->local_host)
1211 {
1212 host = this->local_host->clone(this->local_host);
1213 host->set_port(host, charon->socket->get_port(charon->socket, FALSE));
1214 }
1215 else
1216 {
1217 /* use same address family as for other */
1218 if (!this->other_host->is_anyaddr(this->other_host))
1219 {
1220 family = this->other_host->get_family(this->other_host);
1221 }
1222 host = this->ike_cfg->resolve_me(this->ike_cfg, family);
1223
1224 if (host && host->is_anyaddr(host) &&
1225 !this->other_host->is_anyaddr(this->other_host))
1226 {
1227 host->destroy(host);
1228 host = hydra->kernel_interface->get_source_addr(
1229 hydra->kernel_interface, this->other_host, NULL);
1230 if (host)
1231 {
1232 host->set_port(host, this->ike_cfg->get_my_port(this->ike_cfg));
1233 }
1234 else
1235 { /* fallback to address family specific %any(6), if configured */
1236 host = this->ike_cfg->resolve_me(this->ike_cfg, family);
1237 }
1238 }
1239 }
1240 if (host)
1241 {
1242 set_my_host(this, host);
1243 }
1244 }
1245
1246 METHOD(ike_sa_t, initiate, status_t,
1247 private_ike_sa_t *this, child_cfg_t *child_cfg, u_int32_t reqid,
1248 traffic_selector_t *tsi, traffic_selector_t *tsr)
1249 {
1250 bool defer_initiate = FALSE;
1251
1252 if (this->state == IKE_CREATED)
1253 {
1254 if (this->my_host->is_anyaddr(this->my_host) ||
1255 this->other_host->is_anyaddr(this->other_host))
1256 {
1257 resolve_hosts(this);
1258 }
1259
1260 if (this->other_host->is_anyaddr(this->other_host)
1261 #ifdef ME
1262 && !this->peer_cfg->get_mediated_by(this->peer_cfg)
1263 #endif /* ME */
1264 )
1265 {
1266 char *addr;
1267
1268 addr = this->ike_cfg->get_other_addr(this->ike_cfg);
1269 if (!this->retry_initiate_interval)
1270 {
1271 DBG1(DBG_IKE, "unable to resolve %s, initiate aborted",
1272 addr);
1273 DESTROY_IF(child_cfg);
1274 charon->bus->alert(charon->bus, ALERT_PEER_ADDR_FAILED);
1275 return DESTROY_ME;
1276 }
1277 DBG1(DBG_IKE, "unable to resolve %s, retrying in %ds",
1278 addr, this->retry_initiate_interval);
1279 defer_initiate = TRUE;
1280 }
1281
1282 set_condition(this, COND_ORIGINAL_INITIATOR, TRUE);
1283 this->task_manager->queue_ike(this->task_manager);
1284 }
1285
1286 #ifdef ME
1287 if (this->peer_cfg->is_mediation(this->peer_cfg))
1288 {
1289 if (this->state == IKE_ESTABLISHED)
1290 {
1291 /* mediation connection is already established, retrigger state
1292 * change to notify bus listeners */
1293 DBG1(DBG_IKE, "mediation connection is already up");
1294 set_state(this, IKE_ESTABLISHED);
1295 }
1296 DESTROY_IF(child_cfg);
1297 }
1298 else
1299 #endif /* ME */
1300 if (child_cfg)
1301 {
1302 /* normal IKE_SA with CHILD_SA */
1303 this->task_manager->queue_child(this->task_manager, child_cfg, reqid,
1304 tsi, tsr);
1305 #ifdef ME
1306 if (this->peer_cfg->get_mediated_by(this->peer_cfg))
1307 {
1308 /* mediated connection, initiate mediation process */
1309 job_t *job = (job_t*)initiate_mediation_job_create(this->ike_sa_id);
1310 lib->processor->queue_job(lib->processor, job);
1311 return SUCCESS;
1312 }
1313 #endif /* ME */
1314 }
1315
1316 if (defer_initiate)
1317 {
1318 if (!this->retry_initiate_queued)
1319 {
1320 job_t *job = (job_t*)retry_initiate_job_create(this->ike_sa_id);
1321 lib->scheduler->schedule_job(lib->scheduler, (job_t*)job,
1322 this->retry_initiate_interval);
1323 this->retry_initiate_queued = TRUE;
1324 }
1325 return SUCCESS;
1326 }
1327 this->retry_initiate_queued = FALSE;
1328 return this->task_manager->initiate(this->task_manager);
1329 }
1330
1331 METHOD(ike_sa_t, retry_initiate, status_t,
1332 private_ike_sa_t *this)
1333 {
1334 if (this->retry_initiate_queued)
1335 {
1336 this->retry_initiate_queued = FALSE;
1337 return initiate(this, NULL, 0, NULL, NULL);
1338 }
1339 return SUCCESS;
1340 }
1341
1342 METHOD(ike_sa_t, process_message, status_t,
1343 private_ike_sa_t *this, message_t *message)
1344 {
1345 status_t status;
1346
1347 if (this->state == IKE_PASSIVE)
1348 { /* do not handle messages in passive state */
1349 return FAILED;
1350 }
1351 if (message->get_major_version(message) != this->version)
1352 {
1353 DBG1(DBG_IKE, "ignoring %N IKEv%u exchange on %N SA",
1354 exchange_type_names, message->get_exchange_type(message),
1355 message->get_major_version(message),
1356 ike_version_names, this->version);
1357 /* TODO-IKEv1: fall back to IKEv1 if we receive an IKEv1
1358 * INVALID_MAJOR_VERSION on an IKEv2 SA. */
1359 return FAILED;
1360 }
1361 status = this->task_manager->process_message(this->task_manager, message);
1362 if (this->flush_auth_cfg && this->state == IKE_ESTABLISHED)
1363 {
1364 /* authentication completed */
1365 this->flush_auth_cfg = FALSE;
1366 flush_auth_cfgs(this);
1367 }
1368 return status;
1369 }
1370
1371 METHOD(ike_sa_t, get_id, ike_sa_id_t*,
1372 private_ike_sa_t *this)
1373 {
1374 return this->ike_sa_id;
1375 }
1376
1377 METHOD(ike_sa_t, get_version, ike_version_t,
1378 private_ike_sa_t *this)
1379 {
1380 return this->version;
1381 }
1382
1383 METHOD(ike_sa_t, get_my_id, identification_t*,
1384 private_ike_sa_t *this)
1385 {
1386 return this->my_id;
1387 }
1388
1389 METHOD(ike_sa_t, set_my_id, void,
1390 private_ike_sa_t *this, identification_t *me)
1391 {
1392 DESTROY_IF(this->my_id);
1393 this->my_id = me;
1394 }
1395
1396 METHOD(ike_sa_t, get_other_id, identification_t*,
1397 private_ike_sa_t *this)
1398 {
1399 return this->other_id;
1400 }
1401
1402 METHOD(ike_sa_t, get_other_eap_id, identification_t*,
1403 private_ike_sa_t *this)
1404 {
1405 identification_t *id = NULL, *current;
1406 enumerator_t *enumerator;
1407 auth_cfg_t *cfg;
1408
1409 enumerator = array_create_enumerator(this->other_auths);
1410 while (enumerator->enumerate(enumerator, &cfg))
1411 {
1412 /* prefer EAP-Identity of last round */
1413 current = cfg->get(cfg, AUTH_RULE_EAP_IDENTITY);
1414 if (!current || current->get_type(current) == ID_ANY)
1415 {
1416 current = cfg->get(cfg, AUTH_RULE_XAUTH_IDENTITY);
1417 }
1418 if (!current || current->get_type(current) == ID_ANY)
1419 {
1420 current = cfg->get(cfg, AUTH_RULE_IDENTITY);
1421 }
1422 if (current && current->get_type(current) != ID_ANY)
1423 {
1424 id = current;
1425 continue;
1426 }
1427 }
1428 enumerator->destroy(enumerator);
1429 if (id)
1430 {
1431 return id;
1432 }
1433 return this->other_id;
1434 }
1435
1436 METHOD(ike_sa_t, set_other_id, void,
1437 private_ike_sa_t *this, identification_t *other)
1438 {
1439 DESTROY_IF(this->other_id);
1440 this->other_id = other;
1441 }
1442
1443 METHOD(ike_sa_t, add_child_sa, void,
1444 private_ike_sa_t *this, child_sa_t *child_sa)
1445 {
1446 array_insert_create(&this->child_sas, ARRAY_TAIL, child_sa);
1447 }
1448
1449 METHOD(ike_sa_t, get_child_sa, child_sa_t*,
1450 private_ike_sa_t *this, protocol_id_t protocol, u_int32_t spi, bool inbound)
1451 {
1452 enumerator_t *enumerator;
1453 child_sa_t *current, *found = NULL;
1454
1455 enumerator = array_create_enumerator(this->child_sas);
1456 while (enumerator->enumerate(enumerator, (void**)&current))
1457 {
1458 if (current->get_spi(current, inbound) == spi &&
1459 current->get_protocol(current) == protocol)
1460 {
1461 found = current;
1462 }
1463 }
1464 enumerator->destroy(enumerator);
1465 return found;
1466 }
1467
1468 METHOD(ike_sa_t, get_child_count, int,
1469 private_ike_sa_t *this)
1470 {
1471 return array_count(this->child_sas);
1472 }
1473
1474 METHOD(ike_sa_t, create_child_sa_enumerator, enumerator_t*,
1475 private_ike_sa_t *this)
1476 {
1477 return array_create_enumerator(this->child_sas);
1478 }
1479
1480 METHOD(ike_sa_t, remove_child_sa, void,
1481 private_ike_sa_t *this, enumerator_t *enumerator)
1482 {
1483 array_remove_at(this->child_sas, enumerator);
1484 }
1485
1486 METHOD(ike_sa_t, rekey_child_sa, status_t,
1487 private_ike_sa_t *this, protocol_id_t protocol, u_int32_t spi)
1488 {
1489 if (this->state == IKE_PASSIVE)
1490 {
1491 return INVALID_STATE;
1492 }
1493 this->task_manager->queue_child_rekey(this->task_manager, protocol, spi);
1494 return this->task_manager->initiate(this->task_manager);
1495 }
1496
1497 METHOD(ike_sa_t, delete_child_sa, status_t,
1498 private_ike_sa_t *this, protocol_id_t protocol, u_int32_t spi, bool expired)
1499 {
1500 if (this->state == IKE_PASSIVE)
1501 {
1502 return INVALID_STATE;
1503 }
1504 this->task_manager->queue_child_delete(this->task_manager,
1505 protocol, spi, expired);
1506 return this->task_manager->initiate(this->task_manager);
1507 }
1508
1509 METHOD(ike_sa_t, destroy_child_sa, status_t,
1510 private_ike_sa_t *this, protocol_id_t protocol, u_int32_t spi)
1511 {
1512 enumerator_t *enumerator;
1513 child_sa_t *child_sa;
1514 status_t status = NOT_FOUND;
1515
1516 enumerator = array_create_enumerator(this->child_sas);
1517 while (enumerator->enumerate(enumerator, (void**)&child_sa))
1518 {
1519 if (child_sa->get_protocol(child_sa) == protocol &&
1520 child_sa->get_spi(child_sa, TRUE) == spi)
1521 {
1522 array_remove_at(this->child_sas, enumerator);
1523 child_sa->destroy(child_sa);
1524 status = SUCCESS;
1525 break;
1526 }
1527 }
1528 enumerator->destroy(enumerator);
1529 return status;
1530 }
1531
1532 METHOD(ike_sa_t, delete_, status_t,
1533 private_ike_sa_t *this)
1534 {
1535 switch (this->state)
1536 {
1537 case IKE_REKEYING:
1538 if (this->version == IKEV1)
1539 { /* SA has been reauthenticated, delete */
1540 charon->bus->ike_updown(charon->bus, &this->public, FALSE);
1541 break;
1542 }
1543 /* FALL */
1544 case IKE_ESTABLISHED:
1545 if (time_monotonic(NULL) >= this->stats[STAT_DELETE])
1546 { /* IKE_SA hard lifetime hit */
1547 charon->bus->alert(charon->bus, ALERT_IKE_SA_EXPIRED);
1548 }
1549 this->task_manager->queue_ike_delete(this->task_manager);
1550 return this->task_manager->initiate(this->task_manager);
1551 case IKE_CREATED:
1552 DBG1(DBG_IKE, "deleting unestablished IKE_SA");
1553 break;
1554 case IKE_PASSIVE:
1555 break;
1556 default:
1557 DBG1(DBG_IKE, "destroying IKE_SA in state %N "
1558 "without notification", ike_sa_state_names, this->state);
1559 charon->bus->ike_updown(charon->bus, &this->public, FALSE);
1560 break;
1561 }
1562 return DESTROY_ME;
1563 }
1564
1565 METHOD(ike_sa_t, rekey, status_t,
1566 private_ike_sa_t *this)
1567 {
1568 if (this->state == IKE_PASSIVE)
1569 {
1570 return INVALID_STATE;
1571 }
1572 this->task_manager->queue_ike_rekey(this->task_manager);
1573 return this->task_manager->initiate(this->task_manager);
1574 }
1575
1576 METHOD(ike_sa_t, reauth, status_t,
1577 private_ike_sa_t *this)
1578 {
1579 if (this->state == IKE_PASSIVE)
1580 {
1581 return INVALID_STATE;
1582 }
1583 if (this->state == IKE_CONNECTING)
1584 {
1585 DBG0(DBG_IKE, "reinitiating IKE_SA %s[%d]",
1586 get_name(this), this->unique_id);
1587 reset(this);
1588 this->task_manager->queue_ike(this->task_manager);
1589 return this->task_manager->initiate(this->task_manager);
1590 }
1591 /* we can't reauthenticate as responder when we use EAP or virtual IPs.
1592 * If the peer does not support RFC4478, there is no way to keep the
1593 * IKE_SA up. */
1594 if (!has_condition(this, COND_ORIGINAL_INITIATOR))
1595 {
1596 DBG1(DBG_IKE, "initiator did not reauthenticate as requested");
1597 if (array_count(this->other_vips) != 0 ||
1598 has_condition(this, COND_XAUTH_AUTHENTICATED) ||
1599 has_condition(this, COND_EAP_AUTHENTICATED)
1600 #ifdef ME
1601 /* as mediation server we too cannot reauth the IKE_SA */
1602 || this->is_mediation_server
1603 #endif /* ME */
1604 )
1605 {
1606 time_t del, now;
1607
1608 del = this->stats[STAT_DELETE];
1609 now = time_monotonic(NULL);
1610 DBG1(DBG_IKE, "IKE_SA %s[%d] will timeout in %V",
1611 get_name(this), this->unique_id, &now, &del);
1612 return FAILED;
1613 }
1614 else
1615 {
1616 DBG0(DBG_IKE, "reauthenticating IKE_SA %s[%d] actively",
1617 get_name(this), this->unique_id);
1618 }
1619 }
1620 else
1621 {
1622 DBG0(DBG_IKE, "reauthenticating IKE_SA %s[%d]",
1623 get_name(this), this->unique_id);
1624 }
1625 set_condition(this, COND_REAUTHENTICATING, TRUE);
1626 this->task_manager->queue_ike_reauth(this->task_manager);
1627 return this->task_manager->initiate(this->task_manager);
1628 }
1629
1630 /**
1631 * Check if tasks to create CHILD_SAs are queued in the given queue
1632 */
1633 static bool is_child_queued(private_ike_sa_t *this, task_queue_t queue)
1634 {
1635 enumerator_t *enumerator;
1636 task_t *task;
1637 bool found = FALSE;
1638
1639 enumerator = this->task_manager->create_task_enumerator(this->task_manager,
1640 queue);
1641 while (enumerator->enumerate(enumerator, &task))
1642 {
1643 if (task->get_type(task) == TASK_CHILD_CREATE ||
1644 task->get_type(task) == TASK_QUICK_MODE)
1645 {
1646 found = TRUE;
1647 break;
1648 }
1649 }
1650 enumerator->destroy(enumerator);
1651 return found;
1652 }
1653
1654 METHOD(ike_sa_t, reestablish, status_t,
1655 private_ike_sa_t *this)
1656 {
1657 ike_sa_t *new;
1658 host_t *host;
1659 action_t action;
1660 enumerator_t *enumerator;
1661 child_sa_t *child_sa;
1662 child_cfg_t *child_cfg;
1663 bool restart = FALSE;
1664 status_t status = FAILED;
1665
1666 if (has_condition(this, COND_REAUTHENTICATING))
1667 { /* only reauthenticate if we have children */
1668 if (array_count(this->child_sas) == 0
1669 #ifdef ME
1670 /* allow reauth of mediation connections without CHILD_SAs */
1671 && !this->peer_cfg->is_mediation(this->peer_cfg)
1672 #endif /* ME */
1673 )
1674 {
1675 DBG1(DBG_IKE, "unable to reauthenticate IKE_SA, no CHILD_SA "
1676 "to recreate");
1677 }
1678 else
1679 {
1680 restart = TRUE;
1681 }
1682 }
1683 else
1684 { /* check if we have children to keep up at all */
1685 enumerator = array_create_enumerator(this->child_sas);
1686 while (enumerator->enumerate(enumerator, (void**)&child_sa))
1687 {
1688 if (this->state == IKE_DELETING)
1689 {
1690 action = child_sa->get_close_action(child_sa);
1691 }
1692 else
1693 {
1694 action = child_sa->get_dpd_action(child_sa);
1695 }
1696 switch (action)
1697 {
1698 case ACTION_RESTART:
1699 restart = TRUE;
1700 break;
1701 case ACTION_ROUTE:
1702 charon->traps->install(charon->traps, this->peer_cfg,
1703 child_sa->get_config(child_sa),
1704 child_sa->get_reqid(child_sa));
1705 break;
1706 default:
1707 break;
1708 }
1709 }
1710 enumerator->destroy(enumerator);
1711 /* check if we have tasks that recreate children */
1712 if (!restart)
1713 {
1714 restart = is_child_queued(this, TASK_QUEUE_ACTIVE) ||
1715 is_child_queued(this, TASK_QUEUE_QUEUED);
1716 }
1717 #ifdef ME
1718 /* mediation connections have no children, keep them up anyway */
1719 if (this->peer_cfg->is_mediation(this->peer_cfg))
1720 {
1721 restart = TRUE;
1722 }
1723 #endif /* ME */
1724 }
1725 if (!restart)
1726 {
1727 return FAILED;
1728 }
1729
1730 /* check if we are able to reestablish this IKE_SA */
1731 if (!has_condition(this, COND_ORIGINAL_INITIATOR) &&
1732 (array_count(this->other_vips) != 0 ||
1733 has_condition(this, COND_EAP_AUTHENTICATED)
1734 #ifdef ME
1735 || this->is_mediation_server
1736 #endif /* ME */
1737 ))
1738 {
1739 DBG1(DBG_IKE, "unable to reestablish IKE_SA due to asymmetric setup");
1740 return FAILED;
1741 }
1742
1743 new = charon->ike_sa_manager->checkout_new(charon->ike_sa_manager,
1744 this->version, TRUE);
1745 if (!new)
1746 {
1747 return FAILED;
1748 }
1749 new->set_peer_cfg(new, this->peer_cfg);
1750 host = this->other_host;
1751 new->set_other_host(new, host->clone(host));
1752 host = this->my_host;
1753 new->set_my_host(new, host->clone(host));
1754 charon->bus->ike_reestablish_pre(charon->bus, &this->public, new);
1755 /* resolve hosts but use the old addresses above as fallback */
1756 resolve_hosts((private_ike_sa_t*)new);
1757 /* if we already have a virtual IP, we reuse it */
1758 enumerator = array_create_enumerator(this->my_vips);
1759 while (enumerator->enumerate(enumerator, &host))
1760 {
1761 new->add_virtual_ip(new, TRUE, host);
1762 }
1763 enumerator->destroy(enumerator);
1764
1765 #ifdef ME
1766 if (this->peer_cfg->is_mediation(this->peer_cfg))
1767 {
1768 status = new->initiate(new, NULL, 0, NULL, NULL);
1769 }
1770 else
1771 #endif /* ME */
1772 {
1773 /* handle existing CHILD_SAs */
1774 enumerator = array_create_enumerator(this->child_sas);
1775 while (enumerator->enumerate(enumerator, (void**)&child_sa))
1776 {
1777 if (has_condition(this, COND_REAUTHENTICATING))
1778 {
1779 switch (child_sa->get_state(child_sa))
1780 {
1781 case CHILD_ROUTED:
1782 { /* move routed child directly */
1783 array_remove_at(this->child_sas, enumerator);
1784 new->add_child_sa(new, child_sa);
1785 action = ACTION_NONE;
1786 break;
1787 }
1788 default:
1789 { /* initiate/queue all other CHILD_SAs */
1790 action = ACTION_RESTART;
1791 break;
1792 }
1793 }
1794 }
1795 else
1796 { /* only restart CHILD_SAs that are configured accordingly */
1797 if (this->state == IKE_DELETING)
1798 {
1799 action = child_sa->get_close_action(child_sa);
1800 }
1801 else
1802 {
1803 action = child_sa->get_dpd_action(child_sa);
1804 }
1805 }
1806 switch (action)
1807 {
1808 case ACTION_RESTART:
1809 child_cfg = child_sa->get_config(child_sa);
1810 DBG1(DBG_IKE, "restarting CHILD_SA %s",
1811 child_cfg->get_name(child_cfg));
1812 child_cfg->get_ref(child_cfg);
1813 status = new->initiate(new, child_cfg,
1814 child_sa->get_reqid(child_sa), NULL, NULL);
1815 break;
1816 default:
1817 continue;
1818 }
1819 if (status == DESTROY_ME)
1820 {
1821 break;
1822 }
1823 }
1824 enumerator->destroy(enumerator);
1825 /* adopt any active or queued CHILD-creating tasks */
1826 if (status != DESTROY_ME)
1827 {
1828 task_manager_t *other_tasks = ((private_ike_sa_t*)new)->task_manager;
1829 other_tasks->adopt_child_tasks(other_tasks, this->task_manager);
1830 if (new->get_state(new) == IKE_CREATED)
1831 {
1832 status = new->initiate(new, NULL, 0, NULL, NULL);
1833 }
1834 }
1835 }
1836
1837 if (status == DESTROY_ME)
1838 {
1839 charon->bus->ike_reestablish_post(charon->bus, &this->public, new,
1840 FALSE);
1841 charon->ike_sa_manager->checkin_and_destroy(charon->ike_sa_manager, new);
1842 status = FAILED;
1843 }
1844 else
1845 {
1846 charon->bus->ike_reestablish_post(charon->bus, &this->public, new,
1847 TRUE);
1848 charon->ike_sa_manager->checkin(charon->ike_sa_manager, new);
1849 status = SUCCESS;
1850 }
1851 charon->bus->set_sa(charon->bus, &this->public);
1852 return status;
1853 }
1854
1855 METHOD(ike_sa_t, retransmit, status_t,
1856 private_ike_sa_t *this, u_int32_t message_id)
1857 {
1858 if (this->state == IKE_PASSIVE)
1859 {
1860 return INVALID_STATE;
1861 }
1862 this->stats[STAT_OUTBOUND] = time_monotonic(NULL);
1863 if (this->task_manager->retransmit(this->task_manager, message_id) != SUCCESS)
1864 {
1865 /* send a proper signal to brief interested bus listeners */
1866 switch (this->state)
1867 {
1868 case IKE_CONNECTING:
1869 {
1870 /* retry IKE_SA_INIT/Main Mode if we have multiple keyingtries */
1871 u_int32_t tries = this->peer_cfg->get_keyingtries(this->peer_cfg);
1872 charon->bus->alert(charon->bus, ALERT_PEER_INIT_UNREACHABLE,
1873 this->keyingtry);
1874 this->keyingtry++;
1875 if (tries == 0 || tries > this->keyingtry)
1876 {
1877 DBG1(DBG_IKE, "peer not responding, trying again (%d/%d)",
1878 this->keyingtry + 1, tries);
1879 reset(this);
1880 resolve_hosts(this);
1881 this->task_manager->queue_ike(this->task_manager);
1882 return this->task_manager->initiate(this->task_manager);
1883 }
1884 DBG1(DBG_IKE, "establishing IKE_SA failed, peer not responding");
1885 break;
1886 }
1887 case IKE_DELETING:
1888 DBG1(DBG_IKE, "proper IKE_SA delete failed, peer not responding");
1889 if (has_condition(this, COND_REAUTHENTICATING))
1890 {
1891 DBG1(DBG_IKE, "delete during reauthentication failed, "
1892 "trying to reestablish IKE_SA anyway");
1893 reestablish(this);
1894 }
1895 break;
1896 case IKE_REKEYING:
1897 DBG1(DBG_IKE, "rekeying IKE_SA failed, peer not responding");
1898 /* FALL */
1899 default:
1900 reestablish(this);
1901 break;
1902 }
1903 if (this->state != IKE_CONNECTING)
1904 {
1905 charon->bus->ike_updown(charon->bus, &this->public, FALSE);
1906 }
1907 return DESTROY_ME;
1908 }
1909 return SUCCESS;
1910 }
1911
1912 METHOD(ike_sa_t, set_auth_lifetime, status_t,
1913 private_ike_sa_t *this, u_int32_t lifetime)
1914 {
1915 u_int32_t diff, hard, soft, now;
1916 bool send_update;
1917
1918 diff = this->peer_cfg->get_over_time(this->peer_cfg);
1919 now = time_monotonic(NULL);
1920 hard = now + lifetime;
1921 soft = hard - diff;
1922
1923 /* check if we have to send an AUTH_LIFETIME to enforce the new lifetime.
1924 * We send the notify in IKE_AUTH if not yet ESTABLISHED. */
1925 send_update = this->state == IKE_ESTABLISHED && this->version == IKEV2 &&
1926 !has_condition(this, COND_ORIGINAL_INITIATOR) &&
1927 (array_count(this->other_vips) != 0 ||
1928 has_condition(this, COND_EAP_AUTHENTICATED));
1929
1930 if (lifetime < diff)
1931 {
1932 this->stats[STAT_REAUTH] = now;
1933
1934 if (!send_update)
1935 {
1936 DBG1(DBG_IKE, "received AUTH_LIFETIME of %ds, "
1937 "starting reauthentication", lifetime);
1938 lib->processor->queue_job(lib->processor,
1939 (job_t*)rekey_ike_sa_job_create(this->ike_sa_id, TRUE));
1940 }
1941 }
1942 else if (this->stats[STAT_REAUTH] == 0 ||
1943 this->stats[STAT_REAUTH] > soft)
1944 {
1945 this->stats[STAT_REAUTH] = soft;
1946 if (!send_update)
1947 {
1948 DBG1(DBG_IKE, "received AUTH_LIFETIME of %ds, scheduling "
1949 "reauthentication in %ds", lifetime, lifetime - diff);
1950 lib->scheduler->schedule_job(lib->scheduler,
1951 (job_t*)rekey_ike_sa_job_create(this->ike_sa_id, TRUE),
1952 lifetime - diff);
1953 }
1954 }
1955 else
1956 {
1957 DBG1(DBG_IKE, "received AUTH_LIFETIME of %ds, "
1958 "reauthentication already scheduled in %ds", lifetime,
1959 this->stats[STAT_REAUTH] - time_monotonic(NULL));
1960 send_update = FALSE;
1961 }
1962 /* give at least some seconds to reauthenticate */
1963 this->stats[STAT_DELETE] = max(hard, now + 10);
1964
1965 #ifdef USE_IKEV2
1966 if (send_update)
1967 {
1968 ike_auth_lifetime_t *task;
1969
1970 task = ike_auth_lifetime_create(&this->public, TRUE);
1971 this->task_manager->queue_task(this->task_manager, &task->task);
1972 return this->task_manager->initiate(this->task_manager);
1973 }
1974 #endif
1975 return SUCCESS;
1976 }
1977
1978 /**
1979 * Check if the current combination of source and destination address is still
1980 * valid.
1981 */
1982 static bool is_current_path_valid(private_ike_sa_t *this)
1983 {
1984 bool valid = FALSE;
1985 host_t *src;
1986 src = hydra->kernel_interface->get_source_addr(hydra->kernel_interface,
1987 this->other_host, this->my_host);
1988 if (src)
1989 {
1990 if (src->ip_equals(src, this->my_host))
1991 {
1992 valid = TRUE;
1993 }
1994 src->destroy(src);
1995 }
1996 return valid;
1997 }
1998
1999 /**
2000 * Check if we have any path avialable for this IKE SA.
2001 */
2002 static bool is_any_path_valid(private_ike_sa_t *this)
2003 {
2004 bool valid = FALSE;
2005 enumerator_t *enumerator;
2006 host_t *src = NULL, *addr;
2007 int family = AF_UNSPEC;
2008
2009 switch (charon->socket->supported_families(charon->socket))
2010 {
2011 case SOCKET_FAMILY_IPV4:
2012 family = AF_INET;
2013 break;
2014 case SOCKET_FAMILY_IPV6:
2015 family = AF_INET6;
2016 break;
2017 case SOCKET_FAMILY_BOTH:
2018 case SOCKET_FAMILY_NONE:
2019 break;
2020 }
2021
2022 DBG1(DBG_IKE, "old path is not available anymore, try to find another");
2023 enumerator = create_peer_address_enumerator(this);
2024 while (enumerator->enumerate(enumerator, &addr))
2025 {
2026 if (family != AF_UNSPEC && addr->get_family(addr) != family)
2027 {
2028 continue;
2029 }
2030 DBG1(DBG_IKE, "looking for a route to %H ...", addr);
2031 src = hydra->kernel_interface->get_source_addr(
2032 hydra->kernel_interface, addr, NULL);
2033 if (src)
2034 {
2035 break;
2036 }
2037 }
2038 enumerator->destroy(enumerator);
2039 if (src)
2040 {
2041 valid = TRUE;
2042 src->destroy(src);
2043 }
2044 return valid;
2045 }
2046
2047 METHOD(ike_sa_t, roam, status_t,
2048 private_ike_sa_t *this, bool address)
2049 {
2050 switch (this->state)
2051 {
2052 case IKE_CREATED:
2053 case IKE_DELETING:
2054 case IKE_DESTROYING:
2055 case IKE_PASSIVE:
2056 return SUCCESS;
2057 default:
2058 break;
2059 }
2060
2061 /* keep existing path if possible */
2062 if (is_current_path_valid(this))
2063 {
2064 DBG2(DBG_IKE, "keeping connection path %H - %H",
2065 this->my_host, this->other_host);
2066 set_condition(this, COND_STALE, FALSE);
2067
2068 if (supports_extension(this, EXT_MOBIKE) && address)
2069 { /* if any addresses changed, send an updated list */
2070 DBG1(DBG_IKE, "sending address list update using MOBIKE");
2071 this->task_manager->queue_mobike(this->task_manager, FALSE, TRUE);
2072 return this->task_manager->initiate(this->task_manager);
2073 }
2074 return SUCCESS;
2075 }
2076
2077 if (!is_any_path_valid(this))
2078 {
2079 DBG1(DBG_IKE, "no route found to reach %H, MOBIKE update deferred",
2080 this->other_host);
2081 set_condition(this, COND_STALE, TRUE);
2082 return SUCCESS;
2083 }
2084 set_condition(this, COND_STALE, FALSE);
2085
2086 /* update addresses with mobike, if supported ... */
2087 if (supports_extension(this, EXT_MOBIKE))
2088 {
2089 if (!has_condition(this, COND_ORIGINAL_INITIATOR))
2090 { /* responder updates the peer about changed address config */
2091 DBG1(DBG_IKE, "sending address list update using MOBIKE, "
2092 "implicitly requesting an address change");
2093 address = TRUE;
2094 }
2095 else
2096 {
2097 DBG1(DBG_IKE, "requesting address change using MOBIKE");
2098 }
2099 this->task_manager->queue_mobike(this->task_manager, TRUE, address);
2100 return this->task_manager->initiate(this->task_manager);
2101 }
2102
2103 /* ... reauth if not */
2104 if (!has_condition(this, COND_ORIGINAL_INITIATOR))
2105 { /* responder does not reauthenticate */
2106 set_condition(this, COND_STALE, TRUE);
2107 return SUCCESS;
2108 }
2109 DBG1(DBG_IKE, "reauthenticating IKE_SA due to address change");
2110 /* since our previous path is not valid anymore, try and find a new one */
2111 resolve_hosts(this);
2112 return reauth(this);
2113 }
2114
2115 METHOD(ike_sa_t, add_configuration_attribute, void,
2116 private_ike_sa_t *this, attribute_handler_t *handler,
2117 configuration_attribute_type_t type, chunk_t data)
2118 {
2119 attribute_entry_t entry = {
2120 .handler = handler,
2121 .type = type,
2122 .data = chunk_clone(data),
2123 };
2124 array_insert(this->attributes, ARRAY_TAIL, &entry);
2125 }
2126
2127 /**
2128 * Enumerator filter for attributes
2129 */
2130 static bool filter_attribute(void *null, attribute_entry_t **in,
2131 configuration_attribute_type_t *type, void *in2,
2132 chunk_t *data, void *in3, bool *handled)
2133 {
2134 *type = (*in)->type;
2135 *data = (*in)->data;
2136 *handled = (*in)->handler != NULL;
2137 return TRUE;
2138 }
2139
2140 METHOD(ike_sa_t, create_attribute_enumerator, enumerator_t*,
2141 private_ike_sa_t *this)
2142 {
2143 return enumerator_create_filter(array_create_enumerator(this->attributes),
2144 (void*)filter_attribute, NULL, NULL);
2145 }
2146
2147 METHOD(ike_sa_t, create_task_enumerator, enumerator_t*,
2148 private_ike_sa_t *this, task_queue_t queue)
2149 {
2150 return this->task_manager->create_task_enumerator(this->task_manager, queue);
2151 }
2152
2153 METHOD(ike_sa_t, flush_queue, void,
2154 private_ike_sa_t *this, task_queue_t queue)
2155 {
2156 this->task_manager->flush_queue(this->task_manager, queue);
2157 }
2158
2159 METHOD(ike_sa_t, queue_task, void,
2160 private_ike_sa_t *this, task_t *task)
2161 {
2162 this->task_manager->queue_task(this->task_manager, task);
2163 }
2164
2165 METHOD(ike_sa_t, inherit_pre, void,
2166 private_ike_sa_t *this, ike_sa_t *other_public)
2167 {
2168 private_ike_sa_t *other = (private_ike_sa_t*)other_public;
2169
2170 /* apply config and hosts */
2171 set_peer_cfg(this, other->peer_cfg);
2172 set_my_host(this, other->my_host->clone(other->my_host));
2173 set_other_host(this, other->other_host->clone(other->other_host));
2174
2175 /* apply extensions and conditions with a few exceptions */
2176 this->extensions = other->extensions;
2177 this->conditions = other->conditions;
2178 this->conditions &= ~COND_STALE;
2179 this->conditions &= ~COND_REAUTHENTICATING;
2180 }
2181
2182 METHOD(ike_sa_t, inherit_post, void,
2183 private_ike_sa_t *this, ike_sa_t *other_public)
2184 {
2185 private_ike_sa_t *other = (private_ike_sa_t*)other_public;
2186 child_sa_t *child_sa;
2187 enumerator_t *enumerator;
2188 attribute_entry_t entry;
2189 auth_cfg_t *cfg;
2190 host_t *vip;
2191
2192 /* apply hosts and ids */
2193 this->my_host->destroy(this->my_host);
2194 this->other_host->destroy(this->other_host);
2195 this->my_id->destroy(this->my_id);
2196 this->other_id->destroy(this->other_id);
2197 this->my_host = other->my_host->clone(other->my_host);
2198 this->other_host = other->other_host->clone(other->other_host);
2199 this->my_id = other->my_id->clone(other->my_id);
2200 this->other_id = other->other_id->clone(other->other_id);
2201
2202 /* apply assigned virtual IPs... */
2203 while (array_remove(other->my_vips, ARRAY_HEAD, &vip))
2204 {
2205 array_insert_create(&this->my_vips, ARRAY_TAIL, vip);
2206 }
2207 while (array_remove(other->other_vips, ARRAY_HEAD, &vip))
2208 {
2209 array_insert_create(&this->other_vips, ARRAY_TAIL, vip);
2210 }
2211
2212 /* authentication information */
2213 enumerator = array_create_enumerator(other->my_auths);
2214 while (enumerator->enumerate(enumerator, &cfg))
2215 {
2216 array_insert(this->my_auths, ARRAY_TAIL, cfg->clone(cfg));
2217 }
2218 enumerator->destroy(enumerator);
2219 enumerator = array_create_enumerator(other->other_auths);
2220 while (enumerator->enumerate(enumerator, &cfg))
2221 {
2222 array_insert(this->other_auths, ARRAY_TAIL, cfg->clone(cfg));
2223 }
2224 enumerator->destroy(enumerator);
2225
2226 /* ... and configuration attributes */
2227 while (array_remove(other->attributes, ARRAY_HEAD, &entry))
2228 {
2229 array_insert(this->attributes, ARRAY_TAIL, &entry);
2230 }
2231
2232 /* inherit all conditions */
2233 this->conditions = other->conditions;
2234 if (this->conditions & COND_NAT_HERE)
2235 {
2236 send_keepalive(this);
2237 }
2238
2239 #ifdef ME
2240 if (other->is_mediation_server)
2241 {
2242 act_as_mediation_server(this);
2243 }
2244 else if (other->server_reflexive_host)
2245 {
2246 this->server_reflexive_host = other->server_reflexive_host->clone(
2247 other->server_reflexive_host);
2248 }
2249 #endif /* ME */
2250
2251 /* adopt all children */
2252 while (array_remove(other->child_sas, ARRAY_HEAD, &child_sa))
2253 {
2254 array_insert_create(&this->child_sas, ARRAY_TAIL, child_sa);
2255 }
2256
2257 /* move pending tasks to the new IKE_SA */
2258 this->task_manager->adopt_tasks(this->task_manager, other->task_manager);
2259
2260 /* reauthentication timeout survives a rekeying */
2261 if (other->stats[STAT_REAUTH])
2262 {
2263 time_t reauth, delete, now = time_monotonic(NULL);
2264
2265 this->stats[STAT_REAUTH] = other->stats[STAT_REAUTH];
2266 reauth = this->stats[STAT_REAUTH] - now;
2267 delete = reauth + this->peer_cfg->get_over_time(this->peer_cfg);
2268 this->stats[STAT_DELETE] = this->stats[STAT_REAUTH] + delete;
2269 DBG1(DBG_IKE, "rescheduling reauthentication in %ds after rekeying, "
2270 "lifetime reduced to %ds", reauth, delete);
2271 lib->scheduler->schedule_job(lib->scheduler,
2272 (job_t*)rekey_ike_sa_job_create(this->ike_sa_id, TRUE), reauth);
2273 lib->scheduler->schedule_job(lib->scheduler,
2274 (job_t*)delete_ike_sa_job_create(this->ike_sa_id, TRUE), delete);
2275 }
2276 }
2277
2278 METHOD(ike_sa_t, destroy, void,
2279 private_ike_sa_t *this)
2280 {
2281 attribute_entry_t entry;
2282 child_sa_t *child_sa;
2283 host_t *vip;
2284
2285 charon->bus->set_sa(charon->bus, &this->public);
2286
2287 set_state(this, IKE_DESTROYING);
2288 if (this->task_manager)
2289 {
2290 this->task_manager->flush(this->task_manager);
2291 }
2292
2293 /* remove attributes first, as we pass the IKE_SA to the handler */
2294 charon->bus->handle_vips(charon->bus, &this->public, FALSE);
2295 while (array_remove(this->attributes, ARRAY_TAIL, &entry))
2296 {
2297 if (entry.handler)
2298 {
2299 hydra->attributes->release(hydra->attributes, entry.handler,
2300 this->other_id, entry.type, entry.data);
2301 }
2302 free(entry.data.ptr);
2303 }
2304 /* uninstall CHILD_SAs before virtual IPs, otherwise we might kill
2305 * routes that the CHILD_SA tries to uninstall. */
2306 while (array_remove(this->child_sas, ARRAY_TAIL, &child_sa))
2307 {
2308 child_sa->destroy(child_sa);
2309 }
2310 while (array_remove(this->my_vips, ARRAY_TAIL, &vip))
2311 {
2312 hydra->kernel_interface->del_ip(hydra->kernel_interface, vip, -1, TRUE);
2313 vip->destroy(vip);
2314 }
2315 if (array_count(this->other_vips))
2316 {
2317 charon->bus->assign_vips(charon->bus, &this->public, FALSE);
2318 }
2319 while (array_remove(this->other_vips, ARRAY_TAIL, &vip))
2320 {
2321 if (this->peer_cfg)
2322 {
2323 linked_list_t *pools;
2324 identification_t *id;
2325
2326 id = get_other_eap_id(this);
2327 pools = linked_list_create_from_enumerator(
2328 this->peer_cfg->create_pool_enumerator(this->peer_cfg));
2329 hydra->attributes->release_address(hydra->attributes, pools, vip, id);
2330 pools->destroy(pools);
2331 }
2332 vip->destroy(vip);
2333 }
2334
2335 /* unset SA after here to avoid usage by the listeners */
2336 charon->bus->set_sa(charon->bus, NULL);
2337
2338 array_destroy(this->child_sas);
2339 DESTROY_IF(this->task_manager);
2340 DESTROY_IF(this->keymat);
2341 array_destroy(this->attributes);
2342 array_destroy(this->my_vips);
2343 array_destroy(this->other_vips);
2344 array_destroy_offset(this->peer_addresses, offsetof(host_t, destroy));
2345 #ifdef ME
2346 if (this->is_mediation_server)
2347 {
2348 charon->mediation_manager->remove(charon->mediation_manager,
2349 this->ike_sa_id);
2350 }
2351 DESTROY_IF(this->server_reflexive_host);
2352 chunk_free(&this->connect_id);
2353 #endif /* ME */
2354 free(this->nat_detection_dest.ptr);
2355
2356 DESTROY_IF(this->my_host);
2357 DESTROY_IF(this->other_host);
2358 DESTROY_IF(this->my_id);
2359 DESTROY_IF(this->other_id);
2360 DESTROY_IF(this->local_host);
2361 DESTROY_IF(this->remote_host);
2362
2363 DESTROY_IF(this->ike_cfg);
2364 DESTROY_IF(this->peer_cfg);
2365 DESTROY_IF(this->proposal);
2366 this->my_auth->destroy(this->my_auth);
2367 this->other_auth->destroy(this->other_auth);
2368 array_destroy_offset(this->my_auths, offsetof(auth_cfg_t, destroy));
2369 array_destroy_offset(this->other_auths, offsetof(auth_cfg_t, destroy));
2370
2371 this->ike_sa_id->destroy(this->ike_sa_id);
2372 free(this);
2373 }
2374
2375 /*
2376 * Described in header.
2377 */
2378 ike_sa_t * ike_sa_create(ike_sa_id_t *ike_sa_id, bool initiator,
2379 ike_version_t version)
2380 {
2381 private_ike_sa_t *this;
2382 static refcount_t unique_id = 0;
2383
2384 if (version == IKE_ANY)
2385 { /* prefer IKEv2 if protocol not specified */
2386 #ifdef USE_IKEV2
2387 version = IKEV2;
2388 #else
2389 version = IKEV1;
2390 #endif
2391 }
2392
2393 INIT(this,
2394 .public = {
2395 .get_version = _get_version,
2396 .get_state = _get_state,
2397 .set_state = _set_state,
2398 .get_name = _get_name,
2399 .get_statistic = _get_statistic,
2400 .set_statistic = _set_statistic,
2401 .process_message = _process_message,
2402 .initiate = _initiate,
2403 .retry_initiate = _retry_initiate,
2404 .get_ike_cfg = _get_ike_cfg,
2405 .set_ike_cfg = _set_ike_cfg,
2406 .get_peer_cfg = _get_peer_cfg,
2407 .set_peer_cfg = _set_peer_cfg,
2408 .get_auth_cfg = _get_auth_cfg,
2409 .create_auth_cfg_enumerator = _create_auth_cfg_enumerator,
2410 .add_auth_cfg = _add_auth_cfg,
2411 .get_proposal = _get_proposal,
2412 .set_proposal = _set_proposal,
2413 .get_id = _get_id,
2414 .get_my_host = _get_my_host,
2415 .set_my_host = _set_my_host,
2416 .get_other_host = _get_other_host,
2417 .set_other_host = _set_other_host,
2418 .set_message_id = _set_message_id,
2419 .float_ports = _float_ports,
2420 .update_hosts = _update_hosts,
2421 .get_my_id = _get_my_id,
2422 .set_my_id = _set_my_id,
2423 .get_other_id = _get_other_id,
2424 .set_other_id = _set_other_id,
2425 .get_other_eap_id = _get_other_eap_id,
2426 .enable_extension = _enable_extension,
2427 .supports_extension = _supports_extension,
2428 .set_condition = _set_condition,
2429 .has_condition = _has_condition,
2430 .set_pending_updates = _set_pending_updates,
2431 .get_pending_updates = _get_pending_updates,
2432 .create_peer_address_enumerator = _create_peer_address_enumerator,
2433 .add_peer_address = _add_peer_address,
2434 .clear_peer_addresses = _clear_peer_addresses,
2435 .has_mapping_changed = _has_mapping_changed,
2436 .retransmit = _retransmit,
2437 .delete = _delete_,
2438 .destroy = _destroy,
2439 .send_dpd = _send_dpd,
2440 .send_keepalive = _send_keepalive,
2441 .get_keymat = _get_keymat,
2442 .add_child_sa = _add_child_sa,
2443 .get_child_sa = _get_child_sa,
2444 .get_child_count = _get_child_count,
2445 .create_child_sa_enumerator = _create_child_sa_enumerator,
2446 .remove_child_sa = _remove_child_sa,
2447 .rekey_child_sa = _rekey_child_sa,
2448 .delete_child_sa = _delete_child_sa,
2449 .destroy_child_sa = _destroy_child_sa,
2450 .rekey = _rekey,
2451 .reauth = _reauth,
2452 .reestablish = _reestablish,
2453 .set_auth_lifetime = _set_auth_lifetime,
2454 .roam = _roam,
2455 .inherit_pre = _inherit_pre,
2456 .inherit_post = _inherit_post,
2457 .generate_message = _generate_message,
2458 .generate_message_fragmented = _generate_message_fragmented,
2459 .reset = _reset,
2460 .get_unique_id = _get_unique_id,
2461 .add_virtual_ip = _add_virtual_ip,
2462 .clear_virtual_ips = _clear_virtual_ips,
2463 .create_virtual_ip_enumerator = _create_virtual_ip_enumerator,
2464 .add_configuration_attribute = _add_configuration_attribute,
2465 .create_attribute_enumerator = _create_attribute_enumerator,
2466 .set_kmaddress = _set_kmaddress,
2467 .create_task_enumerator = _create_task_enumerator,
2468 .flush_queue = _flush_queue,
2469 .queue_task = _queue_task,
2470 #ifdef ME
2471 .act_as_mediation_server = _act_as_mediation_server,
2472 .get_server_reflexive_host = _get_server_reflexive_host,
2473 .set_server_reflexive_host = _set_server_reflexive_host,
2474 .get_connect_id = _get_connect_id,
2475 .initiate_mediation = _initiate_mediation,
2476 .initiate_mediated = _initiate_mediated,
2477 .relay = _relay,
2478 .callback = _callback,
2479 .respond = _respond,
2480 #endif /* ME */
2481 },
2482 .ike_sa_id = ike_sa_id->clone(ike_sa_id),
2483 .version = version,
2484 .my_host = host_create_any(AF_INET),
2485 .other_host = host_create_any(AF_INET),
2486 .my_id = identification_create_from_encoding(ID_ANY, chunk_empty),
2487 .other_id = identification_create_from_encoding(ID_ANY, chunk_empty),
2488 .keymat = keymat_create(version, initiator),
2489 .state = IKE_CREATED,
2490 .stats[STAT_INBOUND] = time_monotonic(NULL),
2491 .stats[STAT_OUTBOUND] = time_monotonic(NULL),
2492 .my_auth = auth_cfg_create(),
2493 .other_auth = auth_cfg_create(),
2494 .my_auths = array_create(0, 0),
2495 .other_auths = array_create(0, 0),
2496 .attributes = array_create(sizeof(attribute_entry_t), 0),
2497 .unique_id = ref_get(&unique_id),
2498 .keepalive_interval = lib->settings->get_time(lib->settings,
2499 "%s.keep_alive", KEEPALIVE_INTERVAL, lib->ns),
2500 .retry_initiate_interval = lib->settings->get_time(lib->settings,
2501 "%s.retry_initiate_interval", 0, lib->ns),
2502 .flush_auth_cfg = lib->settings->get_bool(lib->settings,
2503 "%s.flush_auth_cfg", FALSE, lib->ns),
2504 .fragment_size = lib->settings->get_int(lib->settings,
2505 "%s.fragment_size", 0, lib->ns),
2506 );
2507
2508 if (version == IKEV2)
2509 { /* always supported with IKEv2 */
2510 enable_extension(this, EXT_DPD);
2511 }
2512
2513 this->task_manager = task_manager_create(&this->public);
2514 this->my_host->set_port(this->my_host,
2515 charon->socket->get_port(charon->socket, FALSE));
2516
2517 if (!this->task_manager || !this->keymat)
2518 {
2519 DBG1(DBG_IKE, "IKE version %d not supported", this->version);
2520 destroy(this);
2521 return NULL;
2522 }
2523 return &this->public;
2524 }