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ikev2: Add option to disable following redirects as client
[strongswan.git] / src / libcharon / sa / ike_sa.c
1 /*
2 * Copyright (C) 2006-2015 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 Rümelin
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 <daemon.h>
50 #include <collections/array.h>
51 #include <utils/lexparser.h>
52 #include <processing/jobs/retransmit_job.h>
53 #include <processing/jobs/delete_ike_sa_job.h>
54 #include <processing/jobs/send_dpd_job.h>
55 #include <processing/jobs/send_keepalive_job.h>
56 #include <processing/jobs/rekey_ike_sa_job.h>
57 #include <processing/jobs/retry_initiate_job.h>
58 #include <sa/ikev2/tasks/ike_auth_lifetime.h>
59
60 #ifdef ME
61 #include <sa/ikev2/tasks/ike_me.h>
62 #include <processing/jobs/initiate_mediation_job.h>
63 #endif
64
65 ENUM(ike_sa_state_names, IKE_CREATED, IKE_DESTROYING,
66 "CREATED",
67 "CONNECTING",
68 "ESTABLISHED",
69 "PASSIVE",
70 "REKEYING",
71 "DELETING",
72 "DESTROYING",
73 );
74
75 typedef struct private_ike_sa_t private_ike_sa_t;
76 typedef struct attribute_entry_t attribute_entry_t;
77
78 /**
79 * Private data of an ike_sa_t object.
80 */
81 struct private_ike_sa_t {
82
83 /**
84 * Public members
85 */
86 ike_sa_t public;
87
88 /**
89 * Identifier for the current IKE_SA.
90 */
91 ike_sa_id_t *ike_sa_id;
92
93 /**
94 * IKE version of this SA.
95 */
96 ike_version_t version;
97
98 /**
99 * unique numerical ID for this IKE_SA.
100 */
101 u_int32_t unique_id;
102
103 /**
104 * Current state of the IKE_SA
105 */
106 ike_sa_state_t state;
107
108 /**
109 * IKE configuration used to set up this IKE_SA
110 */
111 ike_cfg_t *ike_cfg;
112
113 /**
114 * Peer and authentication information to establish IKE_SA.
115 */
116 peer_cfg_t *peer_cfg;
117
118 /**
119 * currently used authentication ruleset, local
120 */
121 auth_cfg_t *my_auth;
122
123 /**
124 * currently used authentication constraints, remote
125 */
126 auth_cfg_t *other_auth;
127
128 /**
129 * Array of completed local authentication rounds (as auth_cfg_t)
130 */
131 array_t *my_auths;
132
133 /**
134 * Array of completed remote authentication rounds (as auth_cfg_t)
135 */
136 array_t *other_auths;
137
138 /**
139 * Selected IKE proposal
140 */
141 proposal_t *proposal;
142
143 /**
144 * Juggles tasks to process messages
145 */
146 task_manager_t *task_manager;
147
148 /**
149 * Address of local host
150 */
151 host_t *my_host;
152
153 /**
154 * Address of remote host
155 */
156 host_t *other_host;
157
158 #ifdef ME
159 /**
160 * Are we mediation server
161 */
162 bool is_mediation_server;
163
164 /**
165 * Server reflexive host
166 */
167 host_t *server_reflexive_host;
168
169 /**
170 * Connect ID
171 */
172 chunk_t connect_id;
173 #endif /* ME */
174
175 /**
176 * Identification used for us
177 */
178 identification_t *my_id;
179
180 /**
181 * Identification used for other
182 */
183 identification_t *other_id;
184
185 /**
186 * set of extensions the peer supports
187 */
188 ike_extension_t extensions;
189
190 /**
191 * set of condition flags currently enabled for this IKE_SA
192 */
193 ike_condition_t conditions;
194
195 /**
196 * Array containing the child sa's of the current IKE_SA.
197 */
198 array_t *child_sas;
199
200 /**
201 * keymat of this IKE_SA
202 */
203 keymat_t *keymat;
204
205 /**
206 * Virtual IPs on local host
207 */
208 array_t *my_vips;
209
210 /**
211 * Virtual IPs on remote host
212 */
213 array_t *other_vips;
214
215 /**
216 * List of configuration attributes (attribute_entry_t)
217 */
218 array_t *attributes;
219
220 /**
221 * list of peer's addresses, additional ones transmitted via MOBIKE
222 */
223 array_t *peer_addresses;
224
225 /**
226 * previously value of received DESTINATION_IP hash
227 */
228 chunk_t nat_detection_dest;
229
230 /**
231 * number pending UPDATE_SA_ADDRESS (MOBIKE)
232 */
233 u_int32_t pending_updates;
234
235 /**
236 * NAT keep alive interval
237 */
238 u_int32_t keepalive_interval;
239
240 /**
241 * The schedueld keep alive job, if any
242 */
243 send_keepalive_job_t *keepalive_job;
244
245 /**
246 * interval for retries during initiation (e.g. if DNS resolution failed),
247 * 0 to disable (default)
248 */
249 u_int32_t retry_initiate_interval;
250
251 /**
252 * TRUE if a retry_initiate_job has been queued
253 */
254 bool retry_initiate_queued;
255
256 /**
257 * Timestamps for this IKE_SA
258 */
259 u_int32_t stats[STAT_MAX];
260
261 /**
262 * how many times we have retried so far (keyingtries)
263 */
264 u_int32_t keyingtry;
265
266 /**
267 * local host address to be used for IKE, set via MIGRATE kernel message
268 */
269 host_t *local_host;
270
271 /**
272 * remote host address to be used for IKE, set via MIGRATE kernel message
273 */
274 host_t *remote_host;
275
276 /**
277 * Flush auth configs once established?
278 */
279 bool flush_auth_cfg;
280
281 /**
282 * Maximum length of a single fragment, 0 for address-specific defaults
283 */
284 size_t fragment_size;
285
286 /**
287 * Whether to follow IKEv2 redirects
288 */
289 bool follow_redirects;
290 };
291
292 /**
293 * Entry to maintain install configuration attributes during IKE_SA lifetime
294 */
295 struct attribute_entry_t {
296 /** handler used to install this attribute */
297 attribute_handler_t *handler;
298 /** attribute type */
299 configuration_attribute_type_t type;
300 /** attribute data */
301 chunk_t data;
302 };
303
304 /**
305 * get the time of the latest traffic processed by the kernel
306 */
307 static time_t get_use_time(private_ike_sa_t* this, bool inbound)
308 {
309 enumerator_t *enumerator;
310 child_sa_t *child_sa;
311 time_t use_time, current;
312
313 if (inbound)
314 {
315 use_time = this->stats[STAT_INBOUND];
316 }
317 else
318 {
319 use_time = this->stats[STAT_OUTBOUND];
320 }
321
322 enumerator = array_create_enumerator(this->child_sas);
323 while (enumerator->enumerate(enumerator, &child_sa))
324 {
325 child_sa->get_usestats(child_sa, inbound, &current, NULL, NULL);
326 use_time = max(use_time, current);
327 }
328 enumerator->destroy(enumerator);
329
330 return use_time;
331 }
332
333 METHOD(ike_sa_t, get_unique_id, u_int32_t,
334 private_ike_sa_t *this)
335 {
336 return this->unique_id;
337 }
338
339 METHOD(ike_sa_t, get_name, char*,
340 private_ike_sa_t *this)
341 {
342 if (this->peer_cfg)
343 {
344 return this->peer_cfg->get_name(this->peer_cfg);
345 }
346 return "(unnamed)";
347 }
348
349 METHOD(ike_sa_t, get_statistic, u_int32_t,
350 private_ike_sa_t *this, statistic_t kind)
351 {
352 if (kind < STAT_MAX)
353 {
354 return this->stats[kind];
355 }
356 return 0;
357 }
358
359 METHOD(ike_sa_t, set_statistic, void,
360 private_ike_sa_t *this, statistic_t kind, u_int32_t value)
361 {
362 if (kind < STAT_MAX)
363 {
364 this->stats[kind] = value;
365 }
366 }
367
368 METHOD(ike_sa_t, get_my_host, host_t*,
369 private_ike_sa_t *this)
370 {
371 return this->my_host;
372 }
373
374 METHOD(ike_sa_t, set_my_host, void,
375 private_ike_sa_t *this, host_t *me)
376 {
377 DESTROY_IF(this->my_host);
378 this->my_host = me;
379 }
380
381 METHOD(ike_sa_t, get_other_host, host_t*,
382 private_ike_sa_t *this)
383 {
384 return this->other_host;
385 }
386
387 METHOD(ike_sa_t, set_other_host, void,
388 private_ike_sa_t *this, host_t *other)
389 {
390 DESTROY_IF(this->other_host);
391 this->other_host = other;
392 }
393
394 METHOD(ike_sa_t, get_peer_cfg, peer_cfg_t*,
395 private_ike_sa_t *this)
396 {
397 return this->peer_cfg;
398 }
399
400 METHOD(ike_sa_t, set_peer_cfg, void,
401 private_ike_sa_t *this, peer_cfg_t *peer_cfg)
402 {
403 peer_cfg->get_ref(peer_cfg);
404 DESTROY_IF(this->peer_cfg);
405 this->peer_cfg = peer_cfg;
406
407 if (this->ike_cfg == NULL)
408 {
409 this->ike_cfg = peer_cfg->get_ike_cfg(peer_cfg);
410 this->ike_cfg->get_ref(this->ike_cfg);
411 }
412 }
413
414 METHOD(ike_sa_t, get_auth_cfg, auth_cfg_t*,
415 private_ike_sa_t *this, bool local)
416 {
417 if (local)
418 {
419 return this->my_auth;
420 }
421 return this->other_auth;
422 }
423
424 METHOD(ike_sa_t, add_auth_cfg, void,
425 private_ike_sa_t *this, bool local, auth_cfg_t *cfg)
426 {
427 if (local)
428 {
429 array_insert(this->my_auths, ARRAY_TAIL, cfg);
430 }
431 else
432 {
433 array_insert(this->other_auths, ARRAY_TAIL, cfg);
434 }
435 }
436
437 METHOD(ike_sa_t, create_auth_cfg_enumerator, enumerator_t*,
438 private_ike_sa_t *this, bool local)
439 {
440 if (local)
441 {
442 return array_create_enumerator(this->my_auths);
443 }
444 return array_create_enumerator(this->other_auths);
445 }
446
447 /**
448 * Flush the stored authentication round information
449 */
450 static void flush_auth_cfgs(private_ike_sa_t *this)
451 {
452 auth_cfg_t *cfg;
453
454 this->my_auth->purge(this->my_auth, FALSE);
455 this->other_auth->purge(this->other_auth, FALSE);
456
457 while (array_remove(this->my_auths, ARRAY_TAIL, &cfg))
458 {
459 cfg->destroy(cfg);
460 }
461 while (array_remove(this->other_auths, ARRAY_TAIL, &cfg))
462 {
463 cfg->destroy(cfg);
464 }
465 }
466
467 METHOD(ike_sa_t, get_proposal, proposal_t*,
468 private_ike_sa_t *this)
469 {
470 return this->proposal;
471 }
472
473 METHOD(ike_sa_t, set_proposal, void,
474 private_ike_sa_t *this, proposal_t *proposal)
475 {
476 DESTROY_IF(this->proposal);
477 this->proposal = proposal->clone(proposal);
478 }
479
480 METHOD(ike_sa_t, set_message_id, void,
481 private_ike_sa_t *this, bool initiate, u_int32_t mid)
482 {
483 if (initiate)
484 {
485 this->task_manager->reset(this->task_manager, mid, UINT_MAX);
486 }
487 else
488 {
489 this->task_manager->reset(this->task_manager, UINT_MAX, mid);
490 }
491 }
492
493 METHOD(ike_sa_t, send_keepalive, void,
494 private_ike_sa_t *this, bool scheduled)
495 {
496 time_t last_out, now, diff;
497
498 if (scheduled)
499 {
500 this->keepalive_job = NULL;
501 }
502 if (!this->keepalive_interval || this->state == IKE_PASSIVE)
503 { /* keepalives disabled either by configuration or for passive IKE_SAs */
504 return;
505 }
506 if (!(this->conditions & COND_NAT_HERE) || (this->conditions & COND_STALE))
507 { /* disable keepalives if we are not NATed anymore, or the SA is stale */
508 return;
509 }
510
511 last_out = get_use_time(this, FALSE);
512 now = time_monotonic(NULL);
513
514 diff = now - last_out;
515
516 if (diff >= this->keepalive_interval)
517 {
518 packet_t *packet;
519 chunk_t data;
520
521 packet = packet_create();
522 packet->set_source(packet, this->my_host->clone(this->my_host));
523 packet->set_destination(packet, this->other_host->clone(this->other_host));
524 data.ptr = malloc(1);
525 data.ptr[0] = 0xFF;
526 data.len = 1;
527 packet->set_data(packet, data);
528 DBG1(DBG_IKE, "sending keep alive to %#H", this->other_host);
529 charon->sender->send_no_marker(charon->sender, packet);
530 diff = 0;
531 }
532 if (!this->keepalive_job)
533 {
534 this->keepalive_job = send_keepalive_job_create(this->ike_sa_id);
535 lib->scheduler->schedule_job(lib->scheduler, (job_t*)this->keepalive_job,
536 this->keepalive_interval - diff);
537 }
538 }
539
540 METHOD(ike_sa_t, get_ike_cfg, ike_cfg_t*,
541 private_ike_sa_t *this)
542 {
543 return this->ike_cfg;
544 }
545
546 METHOD(ike_sa_t, set_ike_cfg, void,
547 private_ike_sa_t *this, ike_cfg_t *ike_cfg)
548 {
549 ike_cfg->get_ref(ike_cfg);
550 this->ike_cfg = ike_cfg;
551 }
552
553 METHOD(ike_sa_t, enable_extension, void,
554 private_ike_sa_t *this, ike_extension_t extension)
555 {
556 this->extensions |= extension;
557 }
558
559 METHOD(ike_sa_t, supports_extension, bool,
560 private_ike_sa_t *this, ike_extension_t extension)
561 {
562 return (this->extensions & extension) != FALSE;
563 }
564
565 METHOD(ike_sa_t, has_condition, bool,
566 private_ike_sa_t *this, ike_condition_t condition)
567 {
568 return (this->conditions & condition) != FALSE;
569 }
570
571 METHOD(ike_sa_t, set_condition, void,
572 private_ike_sa_t *this, ike_condition_t condition, bool enable)
573 {
574 if (has_condition(this, condition) != enable)
575 {
576 if (enable)
577 {
578 this->conditions |= condition;
579 switch (condition)
580 {
581 case COND_NAT_HERE:
582 DBG1(DBG_IKE, "local host is behind NAT, sending keep alives");
583 this->conditions |= COND_NAT_ANY;
584 send_keepalive(this, FALSE);
585 break;
586 case COND_NAT_THERE:
587 DBG1(DBG_IKE, "remote host is behind NAT");
588 this->conditions |= COND_NAT_ANY;
589 break;
590 case COND_NAT_FAKE:
591 DBG1(DBG_IKE, "faking NAT situation to enforce UDP encapsulation");
592 this->conditions |= COND_NAT_ANY;
593 break;
594 default:
595 break;
596 }
597 }
598 else
599 {
600 this->conditions &= ~condition;
601 switch (condition)
602 {
603 case COND_NAT_HERE:
604 case COND_NAT_FAKE:
605 case COND_NAT_THERE:
606 set_condition(this, COND_NAT_ANY,
607 has_condition(this, COND_NAT_HERE) ||
608 has_condition(this, COND_NAT_THERE) ||
609 has_condition(this, COND_NAT_FAKE));
610 break;
611 case COND_STALE:
612 send_keepalive(this, FALSE);
613 break;
614 default:
615 break;
616 }
617 }
618 }
619 }
620
621 METHOD(ike_sa_t, send_dpd, status_t,
622 private_ike_sa_t *this)
623 {
624 job_t *job;
625 time_t diff, delay;
626 bool task_queued = FALSE;
627
628 if (this->state == IKE_PASSIVE)
629 {
630 return INVALID_STATE;
631 }
632 delay = this->peer_cfg->get_dpd(this->peer_cfg);
633 if (this->task_manager->busy(this->task_manager))
634 {
635 /* an exchange is in the air, no need to start a DPD check */
636 diff = 0;
637 }
638 else
639 {
640 /* check if there was any inbound traffic */
641 time_t last_in, now;
642 last_in = get_use_time(this, TRUE);
643 now = time_monotonic(NULL);
644 diff = now - last_in;
645 if (!delay || diff >= delay)
646 {
647 /* too long ago, initiate dead peer detection */
648 DBG1(DBG_IKE, "sending DPD request");
649 this->task_manager->queue_dpd(this->task_manager);
650 task_queued = TRUE;
651 diff = 0;
652 }
653 }
654 /* recheck in "interval" seconds */
655 if (delay)
656 {
657 job = (job_t*)send_dpd_job_create(this->ike_sa_id);
658 lib->scheduler->schedule_job(lib->scheduler, job, delay - diff);
659 }
660 if (task_queued)
661 {
662 return this->task_manager->initiate(this->task_manager);
663 }
664 return SUCCESS;
665 }
666
667 METHOD(ike_sa_t, get_state, ike_sa_state_t,
668 private_ike_sa_t *this)
669 {
670 return this->state;
671 }
672
673 METHOD(ike_sa_t, set_state, void,
674 private_ike_sa_t *this, ike_sa_state_t state)
675 {
676 bool trigger_dpd = FALSE, keepalives = FALSE;
677
678 DBG2(DBG_IKE, "IKE_SA %s[%d] state change: %N => %N",
679 get_name(this), this->unique_id,
680 ike_sa_state_names, this->state,
681 ike_sa_state_names, state);
682
683 switch (state)
684 {
685 case IKE_ESTABLISHED:
686 {
687 if (this->state == IKE_CONNECTING ||
688 this->state == IKE_PASSIVE)
689 {
690 job_t *job;
691 u_int32_t t;
692
693 /* calculate rekey, reauth and lifetime */
694 this->stats[STAT_ESTABLISHED] = time_monotonic(NULL);
695
696 /* schedule rekeying if we have a time which is smaller than
697 * an already scheduled rekeying */
698 t = this->peer_cfg->get_rekey_time(this->peer_cfg, TRUE);
699 if (t && (this->stats[STAT_REKEY] == 0 ||
700 (this->stats[STAT_REKEY] > t + this->stats[STAT_ESTABLISHED])))
701 {
702 this->stats[STAT_REKEY] = t + this->stats[STAT_ESTABLISHED];
703 job = (job_t*)rekey_ike_sa_job_create(this->ike_sa_id, FALSE);
704 lib->scheduler->schedule_job(lib->scheduler, job, t);
705 DBG1(DBG_IKE, "scheduling rekeying in %ds", t);
706 }
707 t = this->peer_cfg->get_reauth_time(this->peer_cfg, TRUE);
708 if (t && (this->stats[STAT_REAUTH] == 0 ||
709 (this->stats[STAT_REAUTH] > t + this->stats[STAT_ESTABLISHED])))
710 {
711 this->stats[STAT_REAUTH] = t + this->stats[STAT_ESTABLISHED];
712 job = (job_t*)rekey_ike_sa_job_create(this->ike_sa_id, TRUE);
713 lib->scheduler->schedule_job(lib->scheduler, job, t);
714 DBG1(DBG_IKE, "scheduling reauthentication in %ds", t);
715 }
716 t = this->peer_cfg->get_over_time(this->peer_cfg);
717 if (this->stats[STAT_REKEY] || this->stats[STAT_REAUTH])
718 {
719 if (this->stats[STAT_REAUTH] == 0)
720 {
721 this->stats[STAT_DELETE] = this->stats[STAT_REKEY];
722 }
723 else if (this->stats[STAT_REKEY] == 0)
724 {
725 this->stats[STAT_DELETE] = this->stats[STAT_REAUTH];
726 }
727 else
728 {
729 this->stats[STAT_DELETE] = min(this->stats[STAT_REKEY],
730 this->stats[STAT_REAUTH]);
731 }
732 this->stats[STAT_DELETE] += t;
733 t = this->stats[STAT_DELETE] - this->stats[STAT_ESTABLISHED];
734 job = (job_t*)delete_ike_sa_job_create(this->ike_sa_id, TRUE);
735 lib->scheduler->schedule_job(lib->scheduler, job, t);
736 DBG1(DBG_IKE, "maximum IKE_SA lifetime %ds", t);
737 }
738 trigger_dpd = this->peer_cfg->get_dpd(this->peer_cfg);
739 if (trigger_dpd)
740 {
741 /* Some peers delay the DELETE after rekeying an IKE_SA.
742 * If this delay is longer than our DPD delay, we would
743 * send a DPD request here. The IKE_SA is not ready to do
744 * so yet, so prevent that. */
745 this->stats[STAT_INBOUND] = this->stats[STAT_ESTABLISHED];
746 }
747 if (this->state == IKE_PASSIVE)
748 {
749 keepalives = TRUE;
750 }
751 }
752 break;
753 }
754 default:
755 break;
756 }
757 charon->bus->ike_state_change(charon->bus, &this->public, state);
758 this->state = state;
759
760 if (trigger_dpd)
761 {
762 if (supports_extension(this, EXT_DPD))
763 {
764 send_dpd(this);
765 }
766 else
767 {
768 DBG1(DBG_IKE, "DPD not supported by peer, disabled");
769 }
770 }
771 if (keepalives)
772 {
773 send_keepalive(this, FALSE);
774 }
775 }
776
777 METHOD(ike_sa_t, reset, void,
778 private_ike_sa_t *this)
779 {
780 /* the responder ID is reset, as peer may choose another one */
781 if (this->ike_sa_id->is_initiator(this->ike_sa_id))
782 {
783 this->ike_sa_id->set_responder_spi(this->ike_sa_id, 0);
784 }
785
786 set_state(this, IKE_CREATED);
787
788 flush_auth_cfgs(this);
789
790 this->keymat->destroy(this->keymat);
791 this->keymat = keymat_create(this->version,
792 this->ike_sa_id->is_initiator(this->ike_sa_id));
793
794 this->task_manager->reset(this->task_manager, 0, 0);
795 }
796
797 METHOD(ike_sa_t, get_keymat, keymat_t*,
798 private_ike_sa_t *this)
799 {
800 return this->keymat;
801 }
802
803 METHOD(ike_sa_t, add_virtual_ip, void,
804 private_ike_sa_t *this, bool local, host_t *ip)
805 {
806 if (local)
807 {
808 char *iface;
809
810 if (charon->kernel->get_interface(charon->kernel, this->my_host,
811 &iface))
812 {
813 DBG1(DBG_IKE, "installing new virtual IP %H", ip);
814 if (charon->kernel->add_ip(charon->kernel, ip, -1,
815 iface) == SUCCESS)
816 {
817 array_insert_create(&this->my_vips, ARRAY_TAIL, ip->clone(ip));
818 }
819 else
820 {
821 DBG1(DBG_IKE, "installing virtual IP %H failed", ip);
822 }
823 free(iface);
824 }
825 else
826 {
827 DBG1(DBG_IKE, "looking up interface for virtual IP %H failed", ip);
828 }
829 }
830 else
831 {
832 array_insert_create(&this->other_vips, ARRAY_TAIL, ip->clone(ip));
833 }
834 }
835
836
837 METHOD(ike_sa_t, clear_virtual_ips, void,
838 private_ike_sa_t *this, bool local)
839 {
840 array_t *vips;
841 host_t *vip;
842
843 vips = local ? this->my_vips : this->other_vips;
844 if (!local && array_count(vips))
845 {
846 charon->bus->assign_vips(charon->bus, &this->public, FALSE);
847 }
848 while (array_remove(vips, ARRAY_HEAD, &vip))
849 {
850 if (local)
851 {
852 charon->kernel->del_ip(charon->kernel, vip, -1, TRUE);
853 }
854 vip->destroy(vip);
855 }
856 }
857
858 METHOD(ike_sa_t, create_virtual_ip_enumerator, enumerator_t*,
859 private_ike_sa_t *this, bool local)
860 {
861 if (local)
862 {
863 return array_create_enumerator(this->my_vips);
864 }
865 return array_create_enumerator(this->other_vips);
866 }
867
868 METHOD(ike_sa_t, add_peer_address, void,
869 private_ike_sa_t *this, host_t *host)
870 {
871 array_insert_create(&this->peer_addresses, ARRAY_TAIL, host);
872 }
873
874 METHOD(ike_sa_t, create_peer_address_enumerator, enumerator_t*,
875 private_ike_sa_t *this)
876 {
877 if (this->peer_addresses)
878 {
879 return array_create_enumerator(this->peer_addresses);
880 }
881 /* in case we don't have MOBIKE */
882 return enumerator_create_single(this->other_host, NULL);
883 }
884
885 METHOD(ike_sa_t, clear_peer_addresses, void,
886 private_ike_sa_t *this)
887 {
888 array_destroy_offset(this->peer_addresses, offsetof(host_t, destroy));
889 this->peer_addresses = NULL;
890 }
891
892 METHOD(ike_sa_t, has_mapping_changed, bool,
893 private_ike_sa_t *this, chunk_t hash)
894 {
895 if (this->nat_detection_dest.ptr == NULL)
896 {
897 this->nat_detection_dest = chunk_clone(hash);
898 return FALSE;
899 }
900 if (chunk_equals(hash, this->nat_detection_dest))
901 {
902 return FALSE;
903 }
904 free(this->nat_detection_dest.ptr);
905 this->nat_detection_dest = chunk_clone(hash);
906 return TRUE;
907 }
908
909 METHOD(ike_sa_t, set_pending_updates, void,
910 private_ike_sa_t *this, u_int32_t updates)
911 {
912 this->pending_updates = updates;
913 }
914
915 METHOD(ike_sa_t, get_pending_updates, u_int32_t,
916 private_ike_sa_t *this)
917 {
918 return this->pending_updates;
919 }
920
921 METHOD(ike_sa_t, float_ports, void,
922 private_ike_sa_t *this)
923 {
924 /* do not switch if we have a custom port from MOBIKE/NAT */
925 if (this->my_host->get_port(this->my_host) ==
926 charon->socket->get_port(charon->socket, FALSE))
927 {
928 this->my_host->set_port(this->my_host,
929 charon->socket->get_port(charon->socket, TRUE));
930 }
931 if (this->other_host->get_port(this->other_host) == IKEV2_UDP_PORT)
932 {
933 this->other_host->set_port(this->other_host, IKEV2_NATT_PORT);
934 }
935 }
936
937 METHOD(ike_sa_t, update_hosts, void,
938 private_ike_sa_t *this, host_t *me, host_t *other, bool force)
939 {
940 bool update = FALSE;
941
942 if (me == NULL)
943 {
944 me = this->my_host;
945 }
946 if (other == NULL)
947 {
948 other = this->other_host;
949 }
950
951 /* apply hosts on first received message */
952 if (this->my_host->is_anyaddr(this->my_host) ||
953 this->other_host->is_anyaddr(this->other_host))
954 {
955 set_my_host(this, me->clone(me));
956 set_other_host(this, other->clone(other));
957 update = TRUE;
958 }
959 else
960 {
961 /* update our address in any case */
962 if (force && !me->equals(me, this->my_host))
963 {
964 charon->bus->ike_update(charon->bus, &this->public, TRUE, me);
965 set_my_host(this, me->clone(me));
966 update = TRUE;
967 }
968
969 if (!other->equals(other, this->other_host) &&
970 (force || has_condition(this, COND_NAT_THERE)))
971 {
972 /* only update other's address if we are behind a static NAT,
973 * which we assume is the case if we are not initiator */
974 if (force ||
975 (!has_condition(this, COND_NAT_HERE) ||
976 !has_condition(this, COND_ORIGINAL_INITIATOR)))
977 {
978 charon->bus->ike_update(charon->bus, &this->public, FALSE, other);
979 set_other_host(this, other->clone(other));
980 update = TRUE;
981 }
982 }
983 }
984
985 /* update all associated CHILD_SAs, if required */
986 if (update)
987 {
988 enumerator_t *enumerator;
989 child_sa_t *child_sa;
990 linked_list_t *vips;
991
992 vips = linked_list_create_from_enumerator(
993 array_create_enumerator(this->my_vips));
994
995 enumerator = array_create_enumerator(this->child_sas);
996 while (enumerator->enumerate(enumerator, &child_sa))
997 {
998 charon->child_sa_manager->remove(charon->child_sa_manager, child_sa);
999 charon->child_sa_manager->add(charon->child_sa_manager,
1000 child_sa, &this->public);
1001
1002 if (child_sa->update(child_sa, this->my_host, this->other_host,
1003 vips, has_condition(this, COND_NAT_ANY)) == NOT_SUPPORTED)
1004 {
1005 this->public.rekey_child_sa(&this->public,
1006 child_sa->get_protocol(child_sa),
1007 child_sa->get_spi(child_sa, TRUE));
1008 }
1009
1010 }
1011 enumerator->destroy(enumerator);
1012
1013 vips->destroy(vips);
1014 }
1015 }
1016
1017 /**
1018 * Set configured DSCP value on packet
1019 */
1020 static void set_dscp(private_ike_sa_t *this, packet_t *packet)
1021 {
1022 ike_cfg_t *ike_cfg;
1023
1024 /* prefer IKE config on peer_cfg, as its selection is more accurate
1025 * then the initial IKE config */
1026 if (this->peer_cfg)
1027 {
1028 ike_cfg = this->peer_cfg->get_ike_cfg(this->peer_cfg);
1029 }
1030 else
1031 {
1032 ike_cfg = this->ike_cfg;
1033 }
1034 if (ike_cfg)
1035 {
1036 packet->set_dscp(packet, ike_cfg->get_dscp(ike_cfg));
1037 }
1038 }
1039
1040 METHOD(ike_sa_t, generate_message, status_t,
1041 private_ike_sa_t *this, message_t *message, packet_t **packet)
1042 {
1043 status_t status;
1044
1045 if (message->is_encoded(message))
1046 { /* already encoded in task, but set DSCP value */
1047 *packet = message->get_packet(message);
1048 set_dscp(this, *packet);
1049 return SUCCESS;
1050 }
1051 this->stats[STAT_OUTBOUND] = time_monotonic(NULL);
1052 message->set_ike_sa_id(message, this->ike_sa_id);
1053 charon->bus->message(charon->bus, message, FALSE, TRUE);
1054 status = message->generate(message, this->keymat, packet);
1055 if (status == SUCCESS)
1056 {
1057 set_dscp(this, *packet);
1058 charon->bus->message(charon->bus, message, FALSE, FALSE);
1059 }
1060 return status;
1061 }
1062
1063 static bool filter_fragments(private_ike_sa_t *this, packet_t **fragment,
1064 packet_t **packet)
1065 {
1066 *packet = (*fragment)->clone(*fragment);
1067 set_dscp(this, *packet);
1068 return TRUE;
1069 }
1070
1071 METHOD(ike_sa_t, generate_message_fragmented, status_t,
1072 private_ike_sa_t *this, message_t *message, enumerator_t **packets)
1073 {
1074 enumerator_t *fragments;
1075 packet_t *packet;
1076 status_t status;
1077 bool use_frags = FALSE;
1078
1079 if (this->ike_cfg)
1080 {
1081 switch (this->ike_cfg->fragmentation(this->ike_cfg))
1082 {
1083 case FRAGMENTATION_FORCE:
1084 use_frags = TRUE;
1085 break;
1086 case FRAGMENTATION_YES:
1087 use_frags = supports_extension(this, EXT_IKE_FRAGMENTATION);
1088 if (use_frags && this->version == IKEV1 &&
1089 supports_extension(this, EXT_MS_WINDOWS))
1090 {
1091 /* It seems Windows 7 and 8 peers only accept proprietary
1092 * fragmented messages if they expect certificates. */
1093 use_frags = message->get_payload(message,
1094 PLV1_CERTIFICATE) != NULL;
1095 }
1096 break;
1097 default:
1098 break;
1099 }
1100 }
1101 if (!use_frags)
1102 {
1103 status = generate_message(this, message, &packet);
1104 if (status != SUCCESS)
1105 {
1106 return status;
1107 }
1108 *packets = enumerator_create_single(packet, NULL);
1109 return SUCCESS;
1110 }
1111
1112 this->stats[STAT_OUTBOUND] = time_monotonic(NULL);
1113 message->set_ike_sa_id(message, this->ike_sa_id);
1114 charon->bus->message(charon->bus, message, FALSE, TRUE);
1115 status = message->fragment(message, this->keymat, this->fragment_size,
1116 &fragments);
1117 if (status == SUCCESS)
1118 {
1119 charon->bus->message(charon->bus, message, FALSE, FALSE);
1120 *packets = enumerator_create_filter(fragments, (void*)filter_fragments,
1121 this, NULL);
1122 }
1123 return status;
1124 }
1125
1126 METHOD(ike_sa_t, set_kmaddress, void,
1127 private_ike_sa_t *this, host_t *local, host_t *remote)
1128 {
1129 DESTROY_IF(this->local_host);
1130 DESTROY_IF(this->remote_host);
1131 this->local_host = local->clone(local);
1132 this->remote_host = remote->clone(remote);
1133 }
1134
1135 #ifdef ME
1136 METHOD(ike_sa_t, act_as_mediation_server, void,
1137 private_ike_sa_t *this)
1138 {
1139 charon->mediation_manager->update_sa_id(charon->mediation_manager,
1140 this->other_id, this->ike_sa_id);
1141 this->is_mediation_server = TRUE;
1142 }
1143
1144 METHOD(ike_sa_t, get_server_reflexive_host, host_t*,
1145 private_ike_sa_t *this)
1146 {
1147 return this->server_reflexive_host;
1148 }
1149
1150 METHOD(ike_sa_t, set_server_reflexive_host, void,
1151 private_ike_sa_t *this, host_t *host)
1152 {
1153 DESTROY_IF(this->server_reflexive_host);
1154 this->server_reflexive_host = host;
1155 }
1156
1157 METHOD(ike_sa_t, get_connect_id, chunk_t,
1158 private_ike_sa_t *this)
1159 {
1160 return this->connect_id;
1161 }
1162
1163 METHOD(ike_sa_t, respond, status_t,
1164 private_ike_sa_t *this, identification_t *peer_id, chunk_t connect_id)
1165 {
1166 ike_me_t *task = ike_me_create(&this->public, TRUE);
1167 task->respond(task, peer_id, connect_id);
1168 this->task_manager->queue_task(this->task_manager, (task_t*)task);
1169 return this->task_manager->initiate(this->task_manager);
1170 }
1171
1172 METHOD(ike_sa_t, callback, status_t,
1173 private_ike_sa_t *this, identification_t *peer_id)
1174 {
1175 ike_me_t *task = ike_me_create(&this->public, TRUE);
1176 task->callback(task, peer_id);
1177 this->task_manager->queue_task(this->task_manager, (task_t*)task);
1178 return this->task_manager->initiate(this->task_manager);
1179 }
1180
1181 METHOD(ike_sa_t, relay, status_t,
1182 private_ike_sa_t *this, identification_t *requester, chunk_t connect_id,
1183 chunk_t connect_key, linked_list_t *endpoints, bool response)
1184 {
1185 ike_me_t *task = ike_me_create(&this->public, TRUE);
1186 task->relay(task, requester, connect_id, connect_key, endpoints, response);
1187 this->task_manager->queue_task(this->task_manager, (task_t*)task);
1188 return this->task_manager->initiate(this->task_manager);
1189 }
1190
1191 METHOD(ike_sa_t, initiate_mediation, status_t,
1192 private_ike_sa_t *this, peer_cfg_t *mediated_cfg)
1193 {
1194 ike_me_t *task = ike_me_create(&this->public, TRUE);
1195 task->connect(task, mediated_cfg->get_peer_id(mediated_cfg));
1196 this->task_manager->queue_task(this->task_manager, (task_t*)task);
1197 return this->task_manager->initiate(this->task_manager);
1198 }
1199
1200 METHOD(ike_sa_t, initiate_mediated, status_t,
1201 private_ike_sa_t *this, host_t *me, host_t *other, chunk_t connect_id)
1202 {
1203 set_my_host(this, me->clone(me));
1204 set_other_host(this, other->clone(other));
1205 chunk_free(&this->connect_id);
1206 this->connect_id = chunk_clone(connect_id);
1207 return this->task_manager->initiate(this->task_manager);
1208 }
1209 #endif /* ME */
1210
1211 /**
1212 * Resolve DNS host in configuration
1213 */
1214 static void resolve_hosts(private_ike_sa_t *this)
1215 {
1216 host_t *host;
1217 int family = AF_UNSPEC;
1218
1219 switch (charon->socket->supported_families(charon->socket))
1220 {
1221 case SOCKET_FAMILY_IPV4:
1222 family = AF_INET;
1223 break;
1224 case SOCKET_FAMILY_IPV6:
1225 family = AF_INET6;
1226 break;
1227 case SOCKET_FAMILY_BOTH:
1228 case SOCKET_FAMILY_NONE:
1229 break;
1230 }
1231
1232 /* if an IP address is set locally, use the same family to resolve remote */
1233 if (family == AF_UNSPEC && !this->remote_host)
1234 {
1235 if (this->local_host)
1236 {
1237 family = this->local_host->get_family(this->local_host);
1238 }
1239 else
1240 {
1241 family = ike_cfg_get_family(this->ike_cfg, TRUE);
1242 }
1243 }
1244
1245 if (this->remote_host)
1246 {
1247 host = this->remote_host->clone(this->remote_host);
1248 host->set_port(host, IKEV2_UDP_PORT);
1249 }
1250 else
1251 {
1252 host = this->ike_cfg->resolve_other(this->ike_cfg, family);
1253 }
1254 if (host)
1255 {
1256 if (!host->is_anyaddr(host) ||
1257 this->other_host->is_anyaddr(this->other_host))
1258 { /* don't set to %any if we currently have an address, but the
1259 * address family might have changed */
1260 set_other_host(this, host);
1261 }
1262 else
1263 { /* reuse the original port as some implementations might not like
1264 * initial IKE messages on other ports */
1265 this->other_host->set_port(this->other_host, host->get_port(host));
1266 host->destroy(host);
1267 }
1268 }
1269
1270 if (this->local_host)
1271 {
1272 host = this->local_host->clone(this->local_host);
1273 host->set_port(host, charon->socket->get_port(charon->socket, FALSE));
1274 }
1275 else
1276 {
1277 /* use same address family as for other */
1278 if (!this->other_host->is_anyaddr(this->other_host))
1279 {
1280 family = this->other_host->get_family(this->other_host);
1281 }
1282 host = this->ike_cfg->resolve_me(this->ike_cfg, family);
1283
1284 if (host && host->is_anyaddr(host) &&
1285 !this->other_host->is_anyaddr(this->other_host))
1286 {
1287 host->destroy(host);
1288 host = charon->kernel->get_source_addr(charon->kernel,
1289 this->other_host, NULL);
1290 if (host)
1291 {
1292 host->set_port(host, this->ike_cfg->get_my_port(this->ike_cfg));
1293 }
1294 else
1295 { /* fallback to address family specific %any(6), if configured */
1296 host = this->ike_cfg->resolve_me(this->ike_cfg, family);
1297 }
1298 }
1299 }
1300 if (host)
1301 {
1302 set_my_host(this, host);
1303 }
1304 }
1305
1306 METHOD(ike_sa_t, initiate, status_t,
1307 private_ike_sa_t *this, child_cfg_t *child_cfg, u_int32_t reqid,
1308 traffic_selector_t *tsi, traffic_selector_t *tsr)
1309 {
1310 bool defer_initiate = FALSE;
1311
1312 if (this->state == IKE_CREATED)
1313 {
1314 if (this->my_host->is_anyaddr(this->my_host) ||
1315 this->other_host->is_anyaddr(this->other_host))
1316 {
1317 resolve_hosts(this);
1318 }
1319
1320 if (this->other_host->is_anyaddr(this->other_host)
1321 #ifdef ME
1322 && !this->peer_cfg->get_mediated_by(this->peer_cfg)
1323 #endif /* ME */
1324 )
1325 {
1326 char *addr;
1327
1328 addr = this->ike_cfg->get_other_addr(this->ike_cfg);
1329 if (!this->retry_initiate_interval)
1330 {
1331 DBG1(DBG_IKE, "unable to resolve %s, initiate aborted",
1332 addr);
1333 DESTROY_IF(child_cfg);
1334 charon->bus->alert(charon->bus, ALERT_PEER_ADDR_FAILED);
1335 return DESTROY_ME;
1336 }
1337 DBG1(DBG_IKE, "unable to resolve %s, retrying in %ds",
1338 addr, this->retry_initiate_interval);
1339 defer_initiate = TRUE;
1340 }
1341
1342 set_condition(this, COND_ORIGINAL_INITIATOR, TRUE);
1343 this->task_manager->queue_ike(this->task_manager);
1344 }
1345
1346 #ifdef ME
1347 if (this->peer_cfg->is_mediation(this->peer_cfg))
1348 {
1349 if (this->state == IKE_ESTABLISHED)
1350 {
1351 /* mediation connection is already established, retrigger state
1352 * change to notify bus listeners */
1353 DBG1(DBG_IKE, "mediation connection is already up");
1354 set_state(this, IKE_ESTABLISHED);
1355 }
1356 DESTROY_IF(child_cfg);
1357 }
1358 else
1359 #endif /* ME */
1360 if (child_cfg)
1361 {
1362 /* normal IKE_SA with CHILD_SA */
1363 this->task_manager->queue_child(this->task_manager, child_cfg, reqid,
1364 tsi, tsr);
1365 #ifdef ME
1366 if (this->peer_cfg->get_mediated_by(this->peer_cfg))
1367 {
1368 /* mediated connection, initiate mediation process */
1369 job_t *job = (job_t*)initiate_mediation_job_create(this->ike_sa_id);
1370 lib->processor->queue_job(lib->processor, job);
1371 return SUCCESS;
1372 }
1373 #endif /* ME */
1374 }
1375
1376 if (defer_initiate)
1377 {
1378 if (!this->retry_initiate_queued)
1379 {
1380 job_t *job = (job_t*)retry_initiate_job_create(this->ike_sa_id);
1381 lib->scheduler->schedule_job(lib->scheduler, (job_t*)job,
1382 this->retry_initiate_interval);
1383 this->retry_initiate_queued = TRUE;
1384 }
1385 return SUCCESS;
1386 }
1387 this->retry_initiate_queued = FALSE;
1388 return this->task_manager->initiate(this->task_manager);
1389 }
1390
1391 METHOD(ike_sa_t, retry_initiate, status_t,
1392 private_ike_sa_t *this)
1393 {
1394 if (this->retry_initiate_queued)
1395 {
1396 this->retry_initiate_queued = FALSE;
1397 return initiate(this, NULL, 0, NULL, NULL);
1398 }
1399 return SUCCESS;
1400 }
1401
1402 METHOD(ike_sa_t, process_message, status_t,
1403 private_ike_sa_t *this, message_t *message)
1404 {
1405 status_t status;
1406
1407 if (this->state == IKE_PASSIVE)
1408 { /* do not handle messages in passive state */
1409 return FAILED;
1410 }
1411 if (message->get_major_version(message) != this->version)
1412 {
1413 DBG1(DBG_IKE, "ignoring %N IKEv%u exchange on %N SA",
1414 exchange_type_names, message->get_exchange_type(message),
1415 message->get_major_version(message),
1416 ike_version_names, this->version);
1417 /* TODO-IKEv1: fall back to IKEv1 if we receive an IKEv1
1418 * INVALID_MAJOR_VERSION on an IKEv2 SA. */
1419 return FAILED;
1420 }
1421 status = this->task_manager->process_message(this->task_manager, message);
1422 if (this->flush_auth_cfg && this->state == IKE_ESTABLISHED)
1423 {
1424 /* authentication completed */
1425 this->flush_auth_cfg = FALSE;
1426 flush_auth_cfgs(this);
1427 }
1428 return status;
1429 }
1430
1431 METHOD(ike_sa_t, get_id, ike_sa_id_t*,
1432 private_ike_sa_t *this)
1433 {
1434 return this->ike_sa_id;
1435 }
1436
1437 METHOD(ike_sa_t, get_version, ike_version_t,
1438 private_ike_sa_t *this)
1439 {
1440 return this->version;
1441 }
1442
1443 METHOD(ike_sa_t, get_my_id, identification_t*,
1444 private_ike_sa_t *this)
1445 {
1446 return this->my_id;
1447 }
1448
1449 METHOD(ike_sa_t, set_my_id, void,
1450 private_ike_sa_t *this, identification_t *me)
1451 {
1452 DESTROY_IF(this->my_id);
1453 this->my_id = me;
1454 }
1455
1456 METHOD(ike_sa_t, get_other_id, identification_t*,
1457 private_ike_sa_t *this)
1458 {
1459 return this->other_id;
1460 }
1461
1462 METHOD(ike_sa_t, get_other_eap_id, identification_t*,
1463 private_ike_sa_t *this)
1464 {
1465 identification_t *id = NULL, *current;
1466 enumerator_t *enumerator;
1467 auth_cfg_t *cfg;
1468
1469 enumerator = array_create_enumerator(this->other_auths);
1470 while (enumerator->enumerate(enumerator, &cfg))
1471 {
1472 /* prefer EAP-Identity of last round */
1473 current = cfg->get(cfg, AUTH_RULE_EAP_IDENTITY);
1474 if (!current || current->get_type(current) == ID_ANY)
1475 {
1476 current = cfg->get(cfg, AUTH_RULE_XAUTH_IDENTITY);
1477 }
1478 if (!current || current->get_type(current) == ID_ANY)
1479 {
1480 current = cfg->get(cfg, AUTH_RULE_IDENTITY);
1481 }
1482 if (current && current->get_type(current) != ID_ANY)
1483 {
1484 id = current;
1485 continue;
1486 }
1487 }
1488 enumerator->destroy(enumerator);
1489 if (id)
1490 {
1491 return id;
1492 }
1493 return this->other_id;
1494 }
1495
1496 METHOD(ike_sa_t, set_other_id, void,
1497 private_ike_sa_t *this, identification_t *other)
1498 {
1499 DESTROY_IF(this->other_id);
1500 this->other_id = other;
1501 }
1502
1503 METHOD(ike_sa_t, add_child_sa, void,
1504 private_ike_sa_t *this, child_sa_t *child_sa)
1505 {
1506 array_insert_create(&this->child_sas, ARRAY_TAIL, child_sa);
1507 charon->child_sa_manager->add(charon->child_sa_manager,
1508 child_sa, &this->public);
1509 }
1510
1511 METHOD(ike_sa_t, get_child_sa, child_sa_t*,
1512 private_ike_sa_t *this, protocol_id_t protocol, u_int32_t spi, bool inbound)
1513 {
1514 enumerator_t *enumerator;
1515 child_sa_t *current, *found = NULL;
1516
1517 enumerator = array_create_enumerator(this->child_sas);
1518 while (enumerator->enumerate(enumerator, (void**)&current))
1519 {
1520 if (current->get_spi(current, inbound) == spi &&
1521 current->get_protocol(current) == protocol)
1522 {
1523 found = current;
1524 }
1525 }
1526 enumerator->destroy(enumerator);
1527 return found;
1528 }
1529
1530 METHOD(ike_sa_t, get_child_count, int,
1531 private_ike_sa_t *this)
1532 {
1533 return array_count(this->child_sas);
1534 }
1535
1536 /**
1537 * Private data of a create_child_sa_enumerator()
1538 */
1539 typedef struct {
1540 /** implements enumerator */
1541 enumerator_t public;
1542 /** inner array enumerator */
1543 enumerator_t *inner;
1544 /** current item */
1545 child_sa_t *current;
1546 } child_enumerator_t;
1547
1548 METHOD(enumerator_t, child_enumerate, bool,
1549 child_enumerator_t *this, child_sa_t **child_sa)
1550 {
1551 if (this->inner->enumerate(this->inner, &this->current))
1552 {
1553 *child_sa = this->current;
1554 return TRUE;
1555 }
1556 return FALSE;
1557 }
1558
1559 METHOD(enumerator_t, child_enumerator_destroy, void,
1560 child_enumerator_t *this)
1561 {
1562 this->inner->destroy(this->inner);
1563 free(this);
1564 }
1565
1566 METHOD(ike_sa_t, create_child_sa_enumerator, enumerator_t*,
1567 private_ike_sa_t *this)
1568 {
1569 child_enumerator_t *enumerator;
1570
1571 INIT(enumerator,
1572 .public = {
1573 .enumerate = (void*)_child_enumerate,
1574 .destroy = _child_enumerator_destroy,
1575 },
1576 .inner = array_create_enumerator(this->child_sas),
1577 );
1578 return &enumerator->public;
1579 }
1580
1581 METHOD(ike_sa_t, remove_child_sa, void,
1582 private_ike_sa_t *this, enumerator_t *enumerator)
1583 {
1584 child_enumerator_t *ce = (child_enumerator_t*)enumerator;
1585
1586 charon->child_sa_manager->remove(charon->child_sa_manager, ce->current);
1587 array_remove_at(this->child_sas, ce->inner);
1588 }
1589
1590 METHOD(ike_sa_t, rekey_child_sa, status_t,
1591 private_ike_sa_t *this, protocol_id_t protocol, u_int32_t spi)
1592 {
1593 if (this->state == IKE_PASSIVE)
1594 {
1595 return INVALID_STATE;
1596 }
1597 this->task_manager->queue_child_rekey(this->task_manager, protocol, spi);
1598 return this->task_manager->initiate(this->task_manager);
1599 }
1600
1601 METHOD(ike_sa_t, delete_child_sa, status_t,
1602 private_ike_sa_t *this, protocol_id_t protocol, u_int32_t spi, bool expired)
1603 {
1604 if (this->state == IKE_PASSIVE)
1605 {
1606 return INVALID_STATE;
1607 }
1608 this->task_manager->queue_child_delete(this->task_manager,
1609 protocol, spi, expired);
1610 return this->task_manager->initiate(this->task_manager);
1611 }
1612
1613 METHOD(ike_sa_t, destroy_child_sa, status_t,
1614 private_ike_sa_t *this, protocol_id_t protocol, u_int32_t spi)
1615 {
1616 enumerator_t *enumerator;
1617 child_sa_t *child_sa;
1618 status_t status = NOT_FOUND;
1619
1620 enumerator = create_child_sa_enumerator(this);
1621 while (enumerator->enumerate(enumerator, (void**)&child_sa))
1622 {
1623 if (child_sa->get_protocol(child_sa) == protocol &&
1624 child_sa->get_spi(child_sa, TRUE) == spi)
1625 {
1626 remove_child_sa(this, enumerator);
1627 child_sa->destroy(child_sa);
1628 status = SUCCESS;
1629 break;
1630 }
1631 }
1632 enumerator->destroy(enumerator);
1633 return status;
1634 }
1635
1636 METHOD(ike_sa_t, delete_, status_t,
1637 private_ike_sa_t *this)
1638 {
1639 switch (this->state)
1640 {
1641 case IKE_REKEYING:
1642 if (this->version == IKEV1)
1643 { /* SA has been reauthenticated, delete */
1644 charon->bus->ike_updown(charon->bus, &this->public, FALSE);
1645 break;
1646 }
1647 /* FALL */
1648 case IKE_ESTABLISHED:
1649 if (time_monotonic(NULL) >= this->stats[STAT_DELETE])
1650 { /* IKE_SA hard lifetime hit */
1651 charon->bus->alert(charon->bus, ALERT_IKE_SA_EXPIRED);
1652 }
1653 this->task_manager->queue_ike_delete(this->task_manager);
1654 return this->task_manager->initiate(this->task_manager);
1655 case IKE_CREATED:
1656 DBG1(DBG_IKE, "deleting unestablished IKE_SA");
1657 break;
1658 case IKE_PASSIVE:
1659 break;
1660 default:
1661 DBG1(DBG_IKE, "destroying IKE_SA in state %N "
1662 "without notification", ike_sa_state_names, this->state);
1663 charon->bus->ike_updown(charon->bus, &this->public, FALSE);
1664 break;
1665 }
1666 return DESTROY_ME;
1667 }
1668
1669 METHOD(ike_sa_t, rekey, status_t,
1670 private_ike_sa_t *this)
1671 {
1672 if (this->state == IKE_PASSIVE)
1673 {
1674 return INVALID_STATE;
1675 }
1676 this->task_manager->queue_ike_rekey(this->task_manager);
1677 return this->task_manager->initiate(this->task_manager);
1678 }
1679
1680 METHOD(ike_sa_t, reauth, status_t,
1681 private_ike_sa_t *this)
1682 {
1683 if (this->state == IKE_PASSIVE)
1684 {
1685 return INVALID_STATE;
1686 }
1687 if (this->state == IKE_CONNECTING)
1688 {
1689 DBG0(DBG_IKE, "reinitiating IKE_SA %s[%d]",
1690 get_name(this), this->unique_id);
1691 reset(this);
1692 this->task_manager->queue_ike(this->task_manager);
1693 return this->task_manager->initiate(this->task_manager);
1694 }
1695 /* we can't reauthenticate as responder when we use EAP or virtual IPs.
1696 * If the peer does not support RFC4478, there is no way to keep the
1697 * IKE_SA up. */
1698 if (!has_condition(this, COND_ORIGINAL_INITIATOR))
1699 {
1700 DBG1(DBG_IKE, "initiator did not reauthenticate as requested");
1701 if (array_count(this->other_vips) != 0 ||
1702 has_condition(this, COND_XAUTH_AUTHENTICATED) ||
1703 has_condition(this, COND_EAP_AUTHENTICATED)
1704 #ifdef ME
1705 /* as mediation server we too cannot reauth the IKE_SA */
1706 || this->is_mediation_server
1707 #endif /* ME */
1708 )
1709 {
1710 time_t del, now;
1711
1712 del = this->stats[STAT_DELETE];
1713 now = time_monotonic(NULL);
1714 DBG1(DBG_IKE, "IKE_SA %s[%d] will timeout in %V",
1715 get_name(this), this->unique_id, &now, &del);
1716 return FAILED;
1717 }
1718 else
1719 {
1720 DBG0(DBG_IKE, "reauthenticating IKE_SA %s[%d] actively",
1721 get_name(this), this->unique_id);
1722 }
1723 }
1724 else
1725 {
1726 DBG0(DBG_IKE, "reauthenticating IKE_SA %s[%d]",
1727 get_name(this), this->unique_id);
1728 }
1729 set_condition(this, COND_REAUTHENTICATING, TRUE);
1730 this->task_manager->queue_ike_reauth(this->task_manager);
1731 return this->task_manager->initiate(this->task_manager);
1732 }
1733
1734 /**
1735 * Check if tasks to create CHILD_SAs are queued in the given queue
1736 */
1737 static bool is_child_queued(private_ike_sa_t *this, task_queue_t queue)
1738 {
1739 enumerator_t *enumerator;
1740 task_t *task;
1741 bool found = FALSE;
1742
1743 enumerator = this->task_manager->create_task_enumerator(this->task_manager,
1744 queue);
1745 while (enumerator->enumerate(enumerator, &task))
1746 {
1747 if (task->get_type(task) == TASK_CHILD_CREATE ||
1748 task->get_type(task) == TASK_QUICK_MODE)
1749 {
1750 found = TRUE;
1751 break;
1752 }
1753 }
1754 enumerator->destroy(enumerator);
1755 return found;
1756 }
1757
1758 METHOD(ike_sa_t, reestablish, status_t,
1759 private_ike_sa_t *this)
1760 {
1761 ike_sa_t *new;
1762 host_t *host;
1763 action_t action;
1764 enumerator_t *enumerator;
1765 child_sa_t *child_sa;
1766 child_cfg_t *child_cfg;
1767 bool restart = FALSE;
1768 status_t status = FAILED;
1769
1770 if (has_condition(this, COND_REAUTHENTICATING))
1771 { /* only reauthenticate if we have children */
1772 if (array_count(this->child_sas) == 0
1773 #ifdef ME
1774 /* allow reauth of mediation connections without CHILD_SAs */
1775 && !this->peer_cfg->is_mediation(this->peer_cfg)
1776 #endif /* ME */
1777 )
1778 {
1779 DBG1(DBG_IKE, "unable to reauthenticate IKE_SA, no CHILD_SA "
1780 "to recreate");
1781 }
1782 else
1783 {
1784 restart = TRUE;
1785 }
1786 }
1787 else
1788 { /* check if we have children to keep up at all */
1789 enumerator = array_create_enumerator(this->child_sas);
1790 while (enumerator->enumerate(enumerator, (void**)&child_sa))
1791 {
1792 if (this->state == IKE_DELETING)
1793 {
1794 action = child_sa->get_close_action(child_sa);
1795 }
1796 else
1797 {
1798 action = child_sa->get_dpd_action(child_sa);
1799 }
1800 switch (action)
1801 {
1802 case ACTION_RESTART:
1803 restart = TRUE;
1804 break;
1805 case ACTION_ROUTE:
1806 charon->traps->install(charon->traps, this->peer_cfg,
1807 child_sa->get_config(child_sa),
1808 child_sa->get_reqid(child_sa));
1809 break;
1810 default:
1811 break;
1812 }
1813 }
1814 enumerator->destroy(enumerator);
1815 /* check if we have tasks that recreate children */
1816 if (!restart)
1817 {
1818 restart = is_child_queued(this, TASK_QUEUE_ACTIVE) ||
1819 is_child_queued(this, TASK_QUEUE_QUEUED);
1820 }
1821 #ifdef ME
1822 /* mediation connections have no children, keep them up anyway */
1823 if (this->peer_cfg->is_mediation(this->peer_cfg))
1824 {
1825 restart = TRUE;
1826 }
1827 #endif /* ME */
1828 }
1829 if (!restart)
1830 {
1831 return FAILED;
1832 }
1833
1834 /* check if we are able to reestablish this IKE_SA */
1835 if (!has_condition(this, COND_ORIGINAL_INITIATOR) &&
1836 (array_count(this->other_vips) != 0 ||
1837 has_condition(this, COND_EAP_AUTHENTICATED)
1838 #ifdef ME
1839 || this->is_mediation_server
1840 #endif /* ME */
1841 ))
1842 {
1843 DBG1(DBG_IKE, "unable to reestablish IKE_SA due to asymmetric setup");
1844 return FAILED;
1845 }
1846
1847 new = charon->ike_sa_manager->checkout_new(charon->ike_sa_manager,
1848 this->version, TRUE);
1849 if (!new)
1850 {
1851 return FAILED;
1852 }
1853 new->set_peer_cfg(new, this->peer_cfg);
1854 host = this->other_host;
1855 new->set_other_host(new, host->clone(host));
1856 host = this->my_host;
1857 new->set_my_host(new, host->clone(host));
1858 charon->bus->ike_reestablish_pre(charon->bus, &this->public, new);
1859 /* resolve hosts but use the old addresses above as fallback */
1860 resolve_hosts((private_ike_sa_t*)new);
1861 /* if we already have a virtual IP, we reuse it */
1862 enumerator = array_create_enumerator(this->my_vips);
1863 while (enumerator->enumerate(enumerator, &host))
1864 {
1865 new->add_virtual_ip(new, TRUE, host);
1866 }
1867 enumerator->destroy(enumerator);
1868
1869 #ifdef ME
1870 if (this->peer_cfg->is_mediation(this->peer_cfg))
1871 {
1872 status = new->initiate(new, NULL, 0, NULL, NULL);
1873 }
1874 else
1875 #endif /* ME */
1876 {
1877 /* handle existing CHILD_SAs */
1878 enumerator = create_child_sa_enumerator(this);
1879 while (enumerator->enumerate(enumerator, (void**)&child_sa))
1880 {
1881 if (has_condition(this, COND_REAUTHENTICATING))
1882 {
1883 switch (child_sa->get_state(child_sa))
1884 {
1885 case CHILD_ROUTED:
1886 { /* move routed child directly */
1887 remove_child_sa(this, enumerator);
1888 new->add_child_sa(new, child_sa);
1889 action = ACTION_NONE;
1890 break;
1891 }
1892 default:
1893 { /* initiate/queue all other CHILD_SAs */
1894 action = ACTION_RESTART;
1895 break;
1896 }
1897 }
1898 }
1899 else
1900 { /* only restart CHILD_SAs that are configured accordingly */
1901 if (this->state == IKE_DELETING)
1902 {
1903 action = child_sa->get_close_action(child_sa);
1904 }
1905 else
1906 {
1907 action = child_sa->get_dpd_action(child_sa);
1908 }
1909 }
1910 switch (action)
1911 {
1912 case ACTION_RESTART:
1913 child_cfg = child_sa->get_config(child_sa);
1914 DBG1(DBG_IKE, "restarting CHILD_SA %s",
1915 child_cfg->get_name(child_cfg));
1916 child_cfg->get_ref(child_cfg);
1917 status = new->initiate(new, child_cfg,
1918 child_sa->get_reqid(child_sa), NULL, NULL);
1919 break;
1920 default:
1921 continue;
1922 }
1923 if (status == DESTROY_ME)
1924 {
1925 break;
1926 }
1927 }
1928 enumerator->destroy(enumerator);
1929 /* adopt any active or queued CHILD-creating tasks */
1930 if (status != DESTROY_ME)
1931 {
1932 task_manager_t *other_tasks = ((private_ike_sa_t*)new)->task_manager;
1933 other_tasks->adopt_child_tasks(other_tasks, this->task_manager);
1934 if (new->get_state(new) == IKE_CREATED)
1935 {
1936 status = new->initiate(new, NULL, 0, NULL, NULL);
1937 }
1938 }
1939 }
1940
1941 if (status == DESTROY_ME)
1942 {
1943 charon->bus->ike_reestablish_post(charon->bus, &this->public, new,
1944 FALSE);
1945 charon->ike_sa_manager->checkin_and_destroy(charon->ike_sa_manager, new);
1946 status = FAILED;
1947 }
1948 else
1949 {
1950 charon->bus->ike_reestablish_post(charon->bus, &this->public, new,
1951 TRUE);
1952 charon->ike_sa_manager->checkin(charon->ike_sa_manager, new);
1953 status = SUCCESS;
1954 }
1955 charon->bus->set_sa(charon->bus, &this->public);
1956 return status;
1957 }
1958
1959 METHOD(ike_sa_t, handle_redirect, bool,
1960 private_ike_sa_t *this, identification_t *gateway)
1961 {
1962 char gw[BUF_LEN];
1963 host_t *other;
1964
1965 DBG1(DBG_IKE, "redirected to %Y", gateway);
1966 if (!this->follow_redirects)
1967 {
1968 DBG1(DBG_IKE, "server sent REDIRECT even though we disabled it");
1969 return FALSE;
1970 }
1971
1972 snprintf(gw, sizeof(gw), "%Y", gateway);
1973 gw[sizeof(gw)-1] = '\0';
1974 other = host_create_from_dns(gw, AF_UNSPEC, IKEV2_UDP_PORT);
1975 if (!other)
1976 {
1977 DBG1(DBG_IKE, "unable to resolve gateway ID '%Y', redirect failed",
1978 gateway);
1979 return FALSE;
1980 }
1981 switch (this->state)
1982 {
1983 case IKE_CONNECTING:
1984 reset(this);
1985 set_other_host(this, other);
1986 return TRUE;
1987 default:
1988 DBG1(DBG_IKE, "unable to handle redirect for IKE_SA in state %N",
1989 ike_sa_state_names, this->state);
1990 other->destroy(other);
1991 return FALSE;
1992 }
1993 }
1994
1995 METHOD(ike_sa_t, retransmit, status_t,
1996 private_ike_sa_t *this, u_int32_t message_id)
1997 {
1998 if (this->state == IKE_PASSIVE)
1999 {
2000 return INVALID_STATE;
2001 }
2002 this->stats[STAT_OUTBOUND] = time_monotonic(NULL);
2003 if (this->task_manager->retransmit(this->task_manager, message_id) != SUCCESS)
2004 {
2005 /* send a proper signal to brief interested bus listeners */
2006 switch (this->state)
2007 {
2008 case IKE_CONNECTING:
2009 {
2010 /* retry IKE_SA_INIT/Main Mode if we have multiple keyingtries */
2011 u_int32_t tries = this->peer_cfg->get_keyingtries(this->peer_cfg);
2012 charon->bus->alert(charon->bus, ALERT_PEER_INIT_UNREACHABLE,
2013 this->keyingtry);
2014 this->keyingtry++;
2015 if (tries == 0 || tries > this->keyingtry)
2016 {
2017 DBG1(DBG_IKE, "peer not responding, trying again (%d/%d)",
2018 this->keyingtry + 1, tries);
2019 reset(this);
2020 resolve_hosts(this);
2021 this->task_manager->queue_ike(this->task_manager);
2022 return this->task_manager->initiate(this->task_manager);
2023 }
2024 DBG1(DBG_IKE, "establishing IKE_SA failed, peer not responding");
2025 break;
2026 }
2027 case IKE_DELETING:
2028 DBG1(DBG_IKE, "proper IKE_SA delete failed, peer not responding");
2029 if (has_condition(this, COND_REAUTHENTICATING))
2030 {
2031 DBG1(DBG_IKE, "delete during reauthentication failed, "
2032 "trying to reestablish IKE_SA anyway");
2033 reestablish(this);
2034 }
2035 break;
2036 case IKE_REKEYING:
2037 DBG1(DBG_IKE, "rekeying IKE_SA failed, peer not responding");
2038 /* FALL */
2039 default:
2040 reestablish(this);
2041 break;
2042 }
2043 if (this->state != IKE_CONNECTING)
2044 {
2045 charon->bus->ike_updown(charon->bus, &this->public, FALSE);
2046 }
2047 return DESTROY_ME;
2048 }
2049 return SUCCESS;
2050 }
2051
2052 METHOD(ike_sa_t, set_auth_lifetime, status_t,
2053 private_ike_sa_t *this, u_int32_t lifetime)
2054 {
2055 u_int32_t diff, hard, soft, now;
2056 bool send_update;
2057
2058 diff = this->peer_cfg->get_over_time(this->peer_cfg);
2059 now = time_monotonic(NULL);
2060 hard = now + lifetime;
2061 soft = hard - diff;
2062
2063 /* check if we have to send an AUTH_LIFETIME to enforce the new lifetime.
2064 * We send the notify in IKE_AUTH if not yet ESTABLISHED. */
2065 send_update = this->state == IKE_ESTABLISHED && this->version == IKEV2 &&
2066 !has_condition(this, COND_ORIGINAL_INITIATOR) &&
2067 (array_count(this->other_vips) != 0 ||
2068 has_condition(this, COND_EAP_AUTHENTICATED));
2069
2070 if (lifetime < diff)
2071 {
2072 this->stats[STAT_REAUTH] = now;
2073
2074 if (!send_update)
2075 {
2076 DBG1(DBG_IKE, "received AUTH_LIFETIME of %ds, "
2077 "starting reauthentication", lifetime);
2078 lib->processor->queue_job(lib->processor,
2079 (job_t*)rekey_ike_sa_job_create(this->ike_sa_id, TRUE));
2080 }
2081 }
2082 else if (this->stats[STAT_REAUTH] == 0 ||
2083 this->stats[STAT_REAUTH] > soft)
2084 {
2085 this->stats[STAT_REAUTH] = soft;
2086 if (!send_update)
2087 {
2088 DBG1(DBG_IKE, "received AUTH_LIFETIME of %ds, scheduling "
2089 "reauthentication in %ds", lifetime, lifetime - diff);
2090 lib->scheduler->schedule_job(lib->scheduler,
2091 (job_t*)rekey_ike_sa_job_create(this->ike_sa_id, TRUE),
2092 lifetime - diff);
2093 }
2094 }
2095 else
2096 {
2097 DBG1(DBG_IKE, "received AUTH_LIFETIME of %ds, "
2098 "reauthentication already scheduled in %ds", lifetime,
2099 this->stats[STAT_REAUTH] - time_monotonic(NULL));
2100 send_update = FALSE;
2101 }
2102 /* give at least some seconds to reauthenticate */
2103 this->stats[STAT_DELETE] = max(hard, now + 10);
2104
2105 #ifdef USE_IKEV2
2106 if (send_update)
2107 {
2108 ike_auth_lifetime_t *task;
2109
2110 task = ike_auth_lifetime_create(&this->public, TRUE);
2111 this->task_manager->queue_task(this->task_manager, &task->task);
2112 return this->task_manager->initiate(this->task_manager);
2113 }
2114 #endif
2115 return SUCCESS;
2116 }
2117
2118 /**
2119 * Check if the current combination of source and destination address is still
2120 * valid.
2121 */
2122 static bool is_current_path_valid(private_ike_sa_t *this)
2123 {
2124 bool valid = FALSE;
2125 host_t *src;
2126 src = charon->kernel->get_source_addr(charon->kernel, this->other_host,
2127 this->my_host);
2128 if (src)
2129 {
2130 if (src->ip_equals(src, this->my_host))
2131 {
2132 valid = TRUE;
2133 }
2134 src->destroy(src);
2135 }
2136 return valid;
2137 }
2138
2139 /**
2140 * Check if we have any path avialable for this IKE SA.
2141 */
2142 static bool is_any_path_valid(private_ike_sa_t *this)
2143 {
2144 bool valid = FALSE;
2145 enumerator_t *enumerator;
2146 host_t *src = NULL, *addr;
2147 int family = AF_UNSPEC;
2148
2149 switch (charon->socket->supported_families(charon->socket))
2150 {
2151 case SOCKET_FAMILY_IPV4:
2152 family = AF_INET;
2153 break;
2154 case SOCKET_FAMILY_IPV6:
2155 family = AF_INET6;
2156 break;
2157 case SOCKET_FAMILY_BOTH:
2158 case SOCKET_FAMILY_NONE:
2159 break;
2160 }
2161
2162 DBG1(DBG_IKE, "old path is not available anymore, try to find another");
2163 enumerator = create_peer_address_enumerator(this);
2164 while (enumerator->enumerate(enumerator, &addr))
2165 {
2166 if (family != AF_UNSPEC && addr->get_family(addr) != family)
2167 {
2168 continue;
2169 }
2170 DBG1(DBG_IKE, "looking for a route to %H ...", addr);
2171 src = charon->kernel->get_source_addr(charon->kernel, addr, NULL);
2172 if (src)
2173 {
2174 break;
2175 }
2176 }
2177 enumerator->destroy(enumerator);
2178 if (src)
2179 {
2180 valid = TRUE;
2181 src->destroy(src);
2182 }
2183 return valid;
2184 }
2185
2186 METHOD(ike_sa_t, roam, status_t,
2187 private_ike_sa_t *this, bool address)
2188 {
2189 switch (this->state)
2190 {
2191 case IKE_CREATED:
2192 case IKE_DELETING:
2193 case IKE_DESTROYING:
2194 case IKE_PASSIVE:
2195 return SUCCESS;
2196 default:
2197 break;
2198 }
2199
2200 /* keep existing path if possible */
2201 if (is_current_path_valid(this))
2202 {
2203 DBG2(DBG_IKE, "keeping connection path %H - %H",
2204 this->my_host, this->other_host);
2205 set_condition(this, COND_STALE, FALSE);
2206
2207 if (supports_extension(this, EXT_MOBIKE) && address)
2208 { /* if any addresses changed, send an updated list */
2209 DBG1(DBG_IKE, "sending address list update using MOBIKE");
2210 this->task_manager->queue_mobike(this->task_manager, FALSE, TRUE);
2211 return this->task_manager->initiate(this->task_manager);
2212 }
2213 return SUCCESS;
2214 }
2215
2216 if (!is_any_path_valid(this))
2217 {
2218 DBG1(DBG_IKE, "no route found to reach %H, MOBIKE update deferred",
2219 this->other_host);
2220 set_condition(this, COND_STALE, TRUE);
2221 return SUCCESS;
2222 }
2223 set_condition(this, COND_STALE, FALSE);
2224
2225 /* update addresses with mobike, if supported ... */
2226 if (supports_extension(this, EXT_MOBIKE))
2227 {
2228 if (!has_condition(this, COND_ORIGINAL_INITIATOR))
2229 { /* responder updates the peer about changed address config */
2230 DBG1(DBG_IKE, "sending address list update using MOBIKE, "
2231 "implicitly requesting an address change");
2232 address = TRUE;
2233 }
2234 else
2235 {
2236 DBG1(DBG_IKE, "requesting address change using MOBIKE");
2237 }
2238 this->task_manager->queue_mobike(this->task_manager, TRUE, address);
2239 return this->task_manager->initiate(this->task_manager);
2240 }
2241
2242 /* ... reauth if not */
2243 if (!has_condition(this, COND_ORIGINAL_INITIATOR))
2244 { /* responder does not reauthenticate */
2245 set_condition(this, COND_STALE, TRUE);
2246 return SUCCESS;
2247 }
2248 DBG1(DBG_IKE, "reauthenticating IKE_SA due to address change");
2249 /* since our previous path is not valid anymore, try and find a new one */
2250 resolve_hosts(this);
2251 return reauth(this);
2252 }
2253
2254 METHOD(ike_sa_t, add_configuration_attribute, void,
2255 private_ike_sa_t *this, attribute_handler_t *handler,
2256 configuration_attribute_type_t type, chunk_t data)
2257 {
2258 attribute_entry_t entry = {
2259 .handler = handler,
2260 .type = type,
2261 .data = chunk_clone(data),
2262 };
2263 array_insert(this->attributes, ARRAY_TAIL, &entry);
2264 }
2265
2266 /**
2267 * Enumerator filter for attributes
2268 */
2269 static bool filter_attribute(void *null, attribute_entry_t **in,
2270 configuration_attribute_type_t *type, void *in2,
2271 chunk_t *data, void *in3, bool *handled)
2272 {
2273 *type = (*in)->type;
2274 *data = (*in)->data;
2275 *handled = (*in)->handler != NULL;
2276 return TRUE;
2277 }
2278
2279 METHOD(ike_sa_t, create_attribute_enumerator, enumerator_t*,
2280 private_ike_sa_t *this)
2281 {
2282 return enumerator_create_filter(array_create_enumerator(this->attributes),
2283 (void*)filter_attribute, NULL, NULL);
2284 }
2285
2286 METHOD(ike_sa_t, create_task_enumerator, enumerator_t*,
2287 private_ike_sa_t *this, task_queue_t queue)
2288 {
2289 return this->task_manager->create_task_enumerator(this->task_manager, queue);
2290 }
2291
2292 METHOD(ike_sa_t, flush_queue, void,
2293 private_ike_sa_t *this, task_queue_t queue)
2294 {
2295 this->task_manager->flush_queue(this->task_manager, queue);
2296 }
2297
2298 METHOD(ike_sa_t, queue_task, void,
2299 private_ike_sa_t *this, task_t *task)
2300 {
2301 this->task_manager->queue_task(this->task_manager, task);
2302 }
2303
2304 METHOD(ike_sa_t, inherit_pre, void,
2305 private_ike_sa_t *this, ike_sa_t *other_public)
2306 {
2307 private_ike_sa_t *other = (private_ike_sa_t*)other_public;
2308
2309 /* apply config and hosts */
2310 set_peer_cfg(this, other->peer_cfg);
2311 set_my_host(this, other->my_host->clone(other->my_host));
2312 set_other_host(this, other->other_host->clone(other->other_host));
2313
2314 /* apply extensions and conditions with a few exceptions */
2315 this->extensions = other->extensions;
2316 this->conditions = other->conditions;
2317 this->conditions &= ~COND_STALE;
2318 this->conditions &= ~COND_REAUTHENTICATING;
2319 }
2320
2321 METHOD(ike_sa_t, inherit_post, void,
2322 private_ike_sa_t *this, ike_sa_t *other_public)
2323 {
2324 private_ike_sa_t *other = (private_ike_sa_t*)other_public;
2325 child_sa_t *child_sa;
2326 enumerator_t *enumerator;
2327 attribute_entry_t entry;
2328 auth_cfg_t *cfg;
2329 host_t *vip;
2330
2331 /* apply hosts and ids */
2332 this->my_host->destroy(this->my_host);
2333 this->other_host->destroy(this->other_host);
2334 this->my_id->destroy(this->my_id);
2335 this->other_id->destroy(this->other_id);
2336 this->my_host = other->my_host->clone(other->my_host);
2337 this->other_host = other->other_host->clone(other->other_host);
2338 this->my_id = other->my_id->clone(other->my_id);
2339 this->other_id = other->other_id->clone(other->other_id);
2340
2341 /* apply assigned virtual IPs... */
2342 while (array_remove(other->my_vips, ARRAY_HEAD, &vip))
2343 {
2344 array_insert_create(&this->my_vips, ARRAY_TAIL, vip);
2345 }
2346 while (array_remove(other->other_vips, ARRAY_HEAD, &vip))
2347 {
2348 array_insert_create(&this->other_vips, ARRAY_TAIL, vip);
2349 }
2350
2351 /* MOBIKE additional addresses */
2352 while (array_remove(other->peer_addresses, ARRAY_HEAD, &vip))
2353 {
2354 array_insert_create(&this->peer_addresses, ARRAY_TAIL, vip);
2355 }
2356
2357 /* authentication information */
2358 enumerator = array_create_enumerator(other->my_auths);
2359 while (enumerator->enumerate(enumerator, &cfg))
2360 {
2361 array_insert(this->my_auths, ARRAY_TAIL, cfg->clone(cfg));
2362 }
2363 enumerator->destroy(enumerator);
2364 enumerator = array_create_enumerator(other->other_auths);
2365 while (enumerator->enumerate(enumerator, &cfg))
2366 {
2367 array_insert(this->other_auths, ARRAY_TAIL, cfg->clone(cfg));
2368 }
2369 enumerator->destroy(enumerator);
2370
2371 /* ... and configuration attributes */
2372 while (array_remove(other->attributes, ARRAY_HEAD, &entry))
2373 {
2374 array_insert(this->attributes, ARRAY_TAIL, &entry);
2375 }
2376
2377 /* inherit all conditions */
2378 this->conditions = other->conditions;
2379 if (this->conditions & COND_NAT_HERE)
2380 {
2381 send_keepalive(this, FALSE);
2382 }
2383
2384 #ifdef ME
2385 if (other->is_mediation_server)
2386 {
2387 act_as_mediation_server(this);
2388 }
2389 else if (other->server_reflexive_host)
2390 {
2391 this->server_reflexive_host = other->server_reflexive_host->clone(
2392 other->server_reflexive_host);
2393 }
2394 #endif /* ME */
2395
2396 /* adopt all children */
2397 while (array_remove(other->child_sas, ARRAY_HEAD, &child_sa))
2398 {
2399 charon->child_sa_manager->remove(charon->child_sa_manager, child_sa);
2400 add_child_sa(this, child_sa);
2401 }
2402
2403 /* move pending tasks to the new IKE_SA */
2404 this->task_manager->adopt_tasks(this->task_manager, other->task_manager);
2405
2406 /* reauthentication timeout survives a rekeying */
2407 if (other->stats[STAT_REAUTH])
2408 {
2409 time_t reauth, delete, now = time_monotonic(NULL);
2410
2411 this->stats[STAT_REAUTH] = other->stats[STAT_REAUTH];
2412 reauth = this->stats[STAT_REAUTH] - now;
2413 delete = reauth + this->peer_cfg->get_over_time(this->peer_cfg);
2414 this->stats[STAT_DELETE] = this->stats[STAT_REAUTH] + delete;
2415 DBG1(DBG_IKE, "rescheduling reauthentication in %ds after rekeying, "
2416 "lifetime reduced to %ds", reauth, delete);
2417 lib->scheduler->schedule_job(lib->scheduler,
2418 (job_t*)rekey_ike_sa_job_create(this->ike_sa_id, TRUE), reauth);
2419 lib->scheduler->schedule_job(lib->scheduler,
2420 (job_t*)delete_ike_sa_job_create(this->ike_sa_id, TRUE), delete);
2421 }
2422 }
2423
2424 METHOD(ike_sa_t, destroy, void,
2425 private_ike_sa_t *this)
2426 {
2427 attribute_entry_t entry;
2428 child_sa_t *child_sa;
2429 host_t *vip;
2430
2431 charon->bus->set_sa(charon->bus, &this->public);
2432
2433 set_state(this, IKE_DESTROYING);
2434 if (this->task_manager)
2435 {
2436 this->task_manager->flush(this->task_manager);
2437 }
2438
2439 /* remove attributes first, as we pass the IKE_SA to the handler */
2440 charon->bus->handle_vips(charon->bus, &this->public, FALSE);
2441 while (array_remove(this->attributes, ARRAY_TAIL, &entry))
2442 {
2443 if (entry.handler)
2444 {
2445 charon->attributes->release(charon->attributes, entry.handler,
2446 &this->public, entry.type, entry.data);
2447 }
2448 free(entry.data.ptr);
2449 }
2450 /* uninstall CHILD_SAs before virtual IPs, otherwise we might kill
2451 * routes that the CHILD_SA tries to uninstall. */
2452 while (array_remove(this->child_sas, ARRAY_TAIL, &child_sa))
2453 {
2454 charon->child_sa_manager->remove(charon->child_sa_manager, child_sa);
2455 child_sa->destroy(child_sa);
2456 }
2457 while (array_remove(this->my_vips, ARRAY_TAIL, &vip))
2458 {
2459 charon->kernel->del_ip(charon->kernel, vip, -1, TRUE);
2460 vip->destroy(vip);
2461 }
2462 if (array_count(this->other_vips))
2463 {
2464 charon->bus->assign_vips(charon->bus, &this->public, FALSE);
2465 }
2466 while (array_remove(this->other_vips, ARRAY_TAIL, &vip))
2467 {
2468 if (this->peer_cfg)
2469 {
2470 linked_list_t *pools;
2471
2472 pools = linked_list_create_from_enumerator(
2473 this->peer_cfg->create_pool_enumerator(this->peer_cfg));
2474 charon->attributes->release_address(charon->attributes,
2475 pools, vip, &this->public);
2476 pools->destroy(pools);
2477 }
2478 vip->destroy(vip);
2479 }
2480
2481 /* unset SA after here to avoid usage by the listeners */
2482 charon->bus->set_sa(charon->bus, NULL);
2483
2484 array_destroy(this->child_sas);
2485 DESTROY_IF(this->task_manager);
2486 DESTROY_IF(this->keymat);
2487 array_destroy(this->attributes);
2488 array_destroy(this->my_vips);
2489 array_destroy(this->other_vips);
2490 array_destroy_offset(this->peer_addresses, offsetof(host_t, destroy));
2491 #ifdef ME
2492 if (this->is_mediation_server)
2493 {
2494 charon->mediation_manager->remove(charon->mediation_manager,
2495 this->ike_sa_id);
2496 }
2497 DESTROY_IF(this->server_reflexive_host);
2498 chunk_free(&this->connect_id);
2499 #endif /* ME */
2500 free(this->nat_detection_dest.ptr);
2501
2502 DESTROY_IF(this->my_host);
2503 DESTROY_IF(this->other_host);
2504 DESTROY_IF(this->my_id);
2505 DESTROY_IF(this->other_id);
2506 DESTROY_IF(this->local_host);
2507 DESTROY_IF(this->remote_host);
2508
2509 DESTROY_IF(this->ike_cfg);
2510 DESTROY_IF(this->peer_cfg);
2511 DESTROY_IF(this->proposal);
2512 this->my_auth->destroy(this->my_auth);
2513 this->other_auth->destroy(this->other_auth);
2514 array_destroy_offset(this->my_auths, offsetof(auth_cfg_t, destroy));
2515 array_destroy_offset(this->other_auths, offsetof(auth_cfg_t, destroy));
2516
2517 this->ike_sa_id->destroy(this->ike_sa_id);
2518 free(this);
2519 }
2520
2521 /*
2522 * Described in header.
2523 */
2524 ike_sa_t * ike_sa_create(ike_sa_id_t *ike_sa_id, bool initiator,
2525 ike_version_t version)
2526 {
2527 private_ike_sa_t *this;
2528 static refcount_t unique_id = 0;
2529
2530 if (version == IKE_ANY)
2531 { /* prefer IKEv2 if protocol not specified */
2532 #ifdef USE_IKEV2
2533 version = IKEV2;
2534 #else
2535 version = IKEV1;
2536 #endif
2537 }
2538
2539 INIT(this,
2540 .public = {
2541 .get_version = _get_version,
2542 .get_state = _get_state,
2543 .set_state = _set_state,
2544 .get_name = _get_name,
2545 .get_statistic = _get_statistic,
2546 .set_statistic = _set_statistic,
2547 .process_message = _process_message,
2548 .initiate = _initiate,
2549 .retry_initiate = _retry_initiate,
2550 .get_ike_cfg = _get_ike_cfg,
2551 .set_ike_cfg = _set_ike_cfg,
2552 .get_peer_cfg = _get_peer_cfg,
2553 .set_peer_cfg = _set_peer_cfg,
2554 .get_auth_cfg = _get_auth_cfg,
2555 .create_auth_cfg_enumerator = _create_auth_cfg_enumerator,
2556 .add_auth_cfg = _add_auth_cfg,
2557 .get_proposal = _get_proposal,
2558 .set_proposal = _set_proposal,
2559 .get_id = _get_id,
2560 .get_my_host = _get_my_host,
2561 .set_my_host = _set_my_host,
2562 .get_other_host = _get_other_host,
2563 .set_other_host = _set_other_host,
2564 .set_message_id = _set_message_id,
2565 .float_ports = _float_ports,
2566 .update_hosts = _update_hosts,
2567 .get_my_id = _get_my_id,
2568 .set_my_id = _set_my_id,
2569 .get_other_id = _get_other_id,
2570 .set_other_id = _set_other_id,
2571 .get_other_eap_id = _get_other_eap_id,
2572 .enable_extension = _enable_extension,
2573 .supports_extension = _supports_extension,
2574 .set_condition = _set_condition,
2575 .has_condition = _has_condition,
2576 .set_pending_updates = _set_pending_updates,
2577 .get_pending_updates = _get_pending_updates,
2578 .create_peer_address_enumerator = _create_peer_address_enumerator,
2579 .add_peer_address = _add_peer_address,
2580 .clear_peer_addresses = _clear_peer_addresses,
2581 .has_mapping_changed = _has_mapping_changed,
2582 .retransmit = _retransmit,
2583 .delete = _delete_,
2584 .destroy = _destroy,
2585 .send_dpd = _send_dpd,
2586 .send_keepalive = _send_keepalive,
2587 .handle_redirect = _handle_redirect,
2588 .get_keymat = _get_keymat,
2589 .add_child_sa = _add_child_sa,
2590 .get_child_sa = _get_child_sa,
2591 .get_child_count = _get_child_count,
2592 .create_child_sa_enumerator = _create_child_sa_enumerator,
2593 .remove_child_sa = _remove_child_sa,
2594 .rekey_child_sa = _rekey_child_sa,
2595 .delete_child_sa = _delete_child_sa,
2596 .destroy_child_sa = _destroy_child_sa,
2597 .rekey = _rekey,
2598 .reauth = _reauth,
2599 .reestablish = _reestablish,
2600 .set_auth_lifetime = _set_auth_lifetime,
2601 .roam = _roam,
2602 .inherit_pre = _inherit_pre,
2603 .inherit_post = _inherit_post,
2604 .generate_message = _generate_message,
2605 .generate_message_fragmented = _generate_message_fragmented,
2606 .reset = _reset,
2607 .get_unique_id = _get_unique_id,
2608 .add_virtual_ip = _add_virtual_ip,
2609 .clear_virtual_ips = _clear_virtual_ips,
2610 .create_virtual_ip_enumerator = _create_virtual_ip_enumerator,
2611 .add_configuration_attribute = _add_configuration_attribute,
2612 .create_attribute_enumerator = _create_attribute_enumerator,
2613 .set_kmaddress = _set_kmaddress,
2614 .create_task_enumerator = _create_task_enumerator,
2615 .flush_queue = _flush_queue,
2616 .queue_task = _queue_task,
2617 #ifdef ME
2618 .act_as_mediation_server = _act_as_mediation_server,
2619 .get_server_reflexive_host = _get_server_reflexive_host,
2620 .set_server_reflexive_host = _set_server_reflexive_host,
2621 .get_connect_id = _get_connect_id,
2622 .initiate_mediation = _initiate_mediation,
2623 .initiate_mediated = _initiate_mediated,
2624 .relay = _relay,
2625 .callback = _callback,
2626 .respond = _respond,
2627 #endif /* ME */
2628 },
2629 .ike_sa_id = ike_sa_id->clone(ike_sa_id),
2630 .version = version,
2631 .my_host = host_create_any(AF_INET),
2632 .other_host = host_create_any(AF_INET),
2633 .my_id = identification_create_from_encoding(ID_ANY, chunk_empty),
2634 .other_id = identification_create_from_encoding(ID_ANY, chunk_empty),
2635 .keymat = keymat_create(version, initiator),
2636 .state = IKE_CREATED,
2637 .stats[STAT_INBOUND] = time_monotonic(NULL),
2638 .stats[STAT_OUTBOUND] = time_monotonic(NULL),
2639 .my_auth = auth_cfg_create(),
2640 .other_auth = auth_cfg_create(),
2641 .my_auths = array_create(0, 0),
2642 .other_auths = array_create(0, 0),
2643 .attributes = array_create(sizeof(attribute_entry_t), 0),
2644 .unique_id = ref_get(&unique_id),
2645 .keepalive_interval = lib->settings->get_time(lib->settings,
2646 "%s.keep_alive", KEEPALIVE_INTERVAL, lib->ns),
2647 .retry_initiate_interval = lib->settings->get_time(lib->settings,
2648 "%s.retry_initiate_interval", 0, lib->ns),
2649 .flush_auth_cfg = lib->settings->get_bool(lib->settings,
2650 "%s.flush_auth_cfg", FALSE, lib->ns),
2651 .fragment_size = lib->settings->get_int(lib->settings,
2652 "%s.fragment_size", 0, lib->ns),
2653 .follow_redirects = lib->settings->get_bool(lib->settings,
2654 "%s.follow_redirects", TRUE, lib->ns),
2655 );
2656
2657 if (version == IKEV2)
2658 { /* always supported with IKEv2 */
2659 enable_extension(this, EXT_DPD);
2660 }
2661
2662 this->task_manager = task_manager_create(&this->public);
2663 this->my_host->set_port(this->my_host,
2664 charon->socket->get_port(charon->socket, FALSE));
2665
2666 if (!this->task_manager || !this->keymat)
2667 {
2668 DBG1(DBG_IKE, "IKE version %d not supported", this->version);
2669 destroy(this);
2670 return NULL;
2671 }
2672 return &this->public;
2673 }
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