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