c5683e93b5f65c7640abf6ca9ea4774c54caa68b
[strongswan.git] / src / libcharon / sa / ike_sa.c
1 /*
2 * Copyright (C) 2006-2011 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 #include <string.h>
20 #include <sys/stat.h>
21 #include <errno.h>
22 #include <time.h>
23
24 #include "ike_sa.h"
25
26 #include <library.h>
27 #include <hydra.h>
28 #include <daemon.h>
29 #include <utils/linked_list.h>
30 #include <utils/lexparser.h>
31 #include <processing/jobs/retransmit_job.h>
32 #include <processing/jobs/delete_ike_sa_job.h>
33 #include <processing/jobs/send_dpd_job.h>
34 #include <processing/jobs/send_keepalive_job.h>
35 #include <processing/jobs/rekey_ike_sa_job.h>
36
37 #ifdef ME
38 #include <sa/ikev2/tasks/ike_me.h>
39 #include <processing/jobs/initiate_mediation_job.h>
40 #endif
41
42 ENUM(ike_sa_state_names, IKE_CREATED, IKE_DESTROYING,
43 "CREATED",
44 "CONNECTING",
45 "ESTABLISHED",
46 "PASSIVE",
47 "REKEYING",
48 "DELETING",
49 "DESTROYING",
50 );
51
52 typedef struct private_ike_sa_t private_ike_sa_t;
53 typedef struct attribute_entry_t attribute_entry_t;
54
55 /**
56 * Private data of an ike_sa_t object.
57 */
58 struct private_ike_sa_t {
59
60 /**
61 * Public members
62 */
63 ike_sa_t public;
64
65 /**
66 * Identifier for the current IKE_SA.
67 */
68 ike_sa_id_t *ike_sa_id;
69
70 /**
71 * IKE version of this SA.
72 */
73 ike_version_t version;
74
75 /**
76 * unique numerical ID for this IKE_SA.
77 */
78 u_int32_t unique_id;
79
80 /**
81 * Current state of the IKE_SA
82 */
83 ike_sa_state_t state;
84
85 /**
86 * IKE configuration used to set up this IKE_SA
87 */
88 ike_cfg_t *ike_cfg;
89
90 /**
91 * Peer and authentication information to establish IKE_SA.
92 */
93 peer_cfg_t *peer_cfg;
94
95 /**
96 * currently used authentication ruleset, local (as auth_cfg_t)
97 */
98 auth_cfg_t *my_auth;
99
100 /**
101 * list of completed local authentication rounds
102 */
103 linked_list_t *my_auths;
104
105 /**
106 * list of completed remote authentication rounds
107 */
108 linked_list_t *other_auths;
109
110 /**
111 * currently used authentication constraints, remote (as auth_cfg_t)
112 */
113 auth_cfg_t *other_auth;
114
115 /**
116 * Selected IKE proposal
117 */
118 proposal_t *proposal;
119
120 /**
121 * Juggles tasks to process messages
122 */
123 task_manager_t *task_manager;
124
125 /**
126 * Address of local host
127 */
128 host_t *my_host;
129
130 /**
131 * Address of remote host
132 */
133 host_t *other_host;
134
135 #ifdef ME
136 /**
137 * Are we mediation server
138 */
139 bool is_mediation_server;
140
141 /**
142 * Server reflexive host
143 */
144 host_t *server_reflexive_host;
145
146 /**
147 * Connect ID
148 */
149 chunk_t connect_id;
150 #endif /* ME */
151
152 /**
153 * Identification used for us
154 */
155 identification_t *my_id;
156
157 /**
158 * Identification used for other
159 */
160 identification_t *other_id;
161
162 /**
163 * set of extensions the peer supports
164 */
165 ike_extension_t extensions;
166
167 /**
168 * set of condition flags currently enabled for this IKE_SA
169 */
170 ike_condition_t conditions;
171
172 /**
173 * Linked List containing the child sa's of the current IKE_SA.
174 */
175 linked_list_t *child_sas;
176
177 /**
178 * keymat of this IKE_SA
179 */
180 keymat_t *keymat;
181
182 /**
183 * Virtual IP on local host, if any
184 */
185 host_t *my_virtual_ip;
186
187 /**
188 * Virtual IP on remote host, if any
189 */
190 host_t *other_virtual_ip;
191
192 /**
193 * List of configuration attributes (attribute_entry_t)
194 */
195 linked_list_t *attributes;
196
197 /**
198 * list of peers additional addresses, transmitted via MOBIKE
199 */
200 linked_list_t *additional_addresses;
201
202 /**
203 * previously value of received DESTINATION_IP hash
204 */
205 chunk_t nat_detection_dest;
206
207 /**
208 * number pending UPDATE_SA_ADDRESS (MOBIKE)
209 */
210 u_int32_t pending_updates;
211
212 /**
213 * NAT keep alive interval
214 */
215 u_int32_t keepalive_interval;
216
217 /**
218 * Timestamps for this IKE_SA
219 */
220 u_int32_t stats[STAT_MAX];
221
222 /**
223 * how many times we have retried so far (keyingtries)
224 */
225 u_int32_t keyingtry;
226
227 /**
228 * local host address to be used for IKE, set via MIGRATE kernel message
229 */
230 host_t *local_host;
231
232 /**
233 * remote host address to be used for IKE, set via MIGRATE kernel message
234 */
235 host_t *remote_host;
236
237 /**
238 * Flush auth configs once established?
239 */
240 bool flush_auth_cfg;
241 };
242
243 /**
244 * Entry to maintain install configuration attributes during IKE_SA lifetime
245 */
246 struct attribute_entry_t {
247 /** handler used to install this attribute */
248 attribute_handler_t *handler;
249 /** attribute type */
250 configuration_attribute_type_t type;
251 /** attribute data */
252 chunk_t data;
253 };
254
255 /**
256 * get the time of the latest traffic processed by the kernel
257 */
258 static time_t get_use_time(private_ike_sa_t* this, bool inbound)
259 {
260 enumerator_t *enumerator;
261 child_sa_t *child_sa;
262 time_t use_time, current;
263
264 if (inbound)
265 {
266 use_time = this->stats[STAT_INBOUND];
267 }
268 else
269 {
270 use_time = this->stats[STAT_OUTBOUND];
271 }
272 enumerator = this->child_sas->create_enumerator(this->child_sas);
273 while (enumerator->enumerate(enumerator, &child_sa))
274 {
275 child_sa->get_usestats(child_sa, inbound, &current, NULL);
276 use_time = max(use_time, current);
277 }
278 enumerator->destroy(enumerator);
279
280 return use_time;
281 }
282
283 METHOD(ike_sa_t, get_unique_id, u_int32_t,
284 private_ike_sa_t *this)
285 {
286 return this->unique_id;
287 }
288
289 METHOD(ike_sa_t, get_name, char*,
290 private_ike_sa_t *this)
291 {
292 if (this->peer_cfg)
293 {
294 return this->peer_cfg->get_name(this->peer_cfg);
295 }
296 return "(unnamed)";
297 }
298
299 METHOD(ike_sa_t, get_statistic, u_int32_t,
300 private_ike_sa_t *this, statistic_t kind)
301 {
302 if (kind < STAT_MAX)
303 {
304 return this->stats[kind];
305 }
306 return 0;
307 }
308
309 METHOD(ike_sa_t, set_statistic, void,
310 private_ike_sa_t *this, statistic_t kind, u_int32_t value)
311 {
312 if (kind < STAT_MAX)
313 {
314 this->stats[kind] = value;
315 }
316 }
317
318 METHOD(ike_sa_t, get_my_host, host_t*,
319 private_ike_sa_t *this)
320 {
321 return this->my_host;
322 }
323
324 METHOD(ike_sa_t, set_my_host, void,
325 private_ike_sa_t *this, host_t *me)
326 {
327 DESTROY_IF(this->my_host);
328 this->my_host = me;
329 }
330
331 METHOD(ike_sa_t, get_other_host, host_t*,
332 private_ike_sa_t *this)
333 {
334 return this->other_host;
335 }
336
337 METHOD(ike_sa_t, set_other_host, void,
338 private_ike_sa_t *this, host_t *other)
339 {
340 DESTROY_IF(this->other_host);
341 this->other_host = other;
342 }
343
344 METHOD(ike_sa_t, get_peer_cfg, peer_cfg_t*,
345 private_ike_sa_t *this)
346 {
347 return this->peer_cfg;
348 }
349
350 METHOD(ike_sa_t, set_peer_cfg, void,
351 private_ike_sa_t *this, peer_cfg_t *peer_cfg)
352 {
353 peer_cfg->get_ref(peer_cfg);
354 DESTROY_IF(this->peer_cfg);
355 this->peer_cfg = peer_cfg;
356
357 if (this->ike_cfg == NULL)
358 {
359 this->ike_cfg = peer_cfg->get_ike_cfg(peer_cfg);
360 this->ike_cfg->get_ref(this->ike_cfg);
361 }
362 }
363
364 METHOD(ike_sa_t, get_auth_cfg, auth_cfg_t*,
365 private_ike_sa_t *this, bool local)
366 {
367 if (local)
368 {
369 return this->my_auth;
370 }
371 return this->other_auth;
372 }
373
374 METHOD(ike_sa_t, add_auth_cfg, void,
375 private_ike_sa_t *this, bool local, auth_cfg_t *cfg)
376 {
377 if (local)
378 {
379 this->my_auths->insert_last(this->my_auths, cfg);
380 }
381 else
382 {
383 this->other_auths->insert_last(this->other_auths, cfg);
384 }
385 }
386
387 METHOD(ike_sa_t, create_auth_cfg_enumerator, enumerator_t*,
388 private_ike_sa_t *this, bool local)
389 {
390 if (local)
391 {
392 return this->my_auths->create_enumerator(this->my_auths);
393 }
394 return this->other_auths->create_enumerator(this->other_auths);
395 }
396
397 /**
398 * Flush the stored authentication round information
399 */
400 static void flush_auth_cfgs(private_ike_sa_t *this)
401 {
402 auth_cfg_t *cfg;
403
404 this->my_auth->purge(this->my_auth, FALSE);
405 this->other_auth->purge(this->other_auth, FALSE);
406
407 while (this->my_auths->remove_last(this->my_auths,
408 (void**)&cfg) == SUCCESS)
409 {
410 cfg->destroy(cfg);
411 }
412 while (this->other_auths->remove_last(this->other_auths,
413 (void**)&cfg) == SUCCESS)
414 {
415 cfg->destroy(cfg);
416 }
417 }
418
419 METHOD(ike_sa_t, get_proposal, proposal_t*,
420 private_ike_sa_t *this)
421 {
422 return this->proposal;
423 }
424
425 METHOD(ike_sa_t, set_proposal, void,
426 private_ike_sa_t *this, proposal_t *proposal)
427 {
428 DESTROY_IF(this->proposal);
429 this->proposal = proposal->clone(proposal);
430 }
431
432 METHOD(ike_sa_t, set_message_id, void,
433 private_ike_sa_t *this, bool initiate, u_int32_t mid)
434 {
435 if (initiate)
436 {
437 this->task_manager->reset(this->task_manager, mid, UINT_MAX);
438 }
439 else
440 {
441 this->task_manager->reset(this->task_manager, UINT_MAX, mid);
442 }
443 }
444
445 METHOD(ike_sa_t, send_keepalive, void,
446 private_ike_sa_t *this)
447 {
448 send_keepalive_job_t *job;
449 time_t last_out, now, diff;
450
451 if (!(this->conditions & COND_NAT_HERE) || this->keepalive_interval == 0)
452 { /* disable keep alives if we are not NATed anymore */
453 return;
454 }
455
456 last_out = get_use_time(this, FALSE);
457 now = time_monotonic(NULL);
458
459 diff = now - last_out;
460
461 if (diff >= this->keepalive_interval)
462 {
463 packet_t *packet;
464 chunk_t data;
465
466 packet = packet_create();
467 packet->set_source(packet, this->my_host->clone(this->my_host));
468 packet->set_destination(packet, this->other_host->clone(this->other_host));
469 data.ptr = malloc(1);
470 data.ptr[0] = 0xFF;
471 data.len = 1;
472 packet->set_data(packet, data);
473 DBG1(DBG_IKE, "sending keep alive");
474 charon->sender->send(charon->sender, packet);
475 diff = 0;
476 }
477 job = send_keepalive_job_create(this->ike_sa_id);
478 lib->scheduler->schedule_job(lib->scheduler, (job_t*)job,
479 this->keepalive_interval - diff);
480 }
481
482 METHOD(ike_sa_t, get_ike_cfg, ike_cfg_t*,
483 private_ike_sa_t *this)
484 {
485 return this->ike_cfg;
486 }
487
488 METHOD(ike_sa_t, set_ike_cfg, void,
489 private_ike_sa_t *this, ike_cfg_t *ike_cfg)
490 {
491 ike_cfg->get_ref(ike_cfg);
492 this->ike_cfg = ike_cfg;
493 }
494
495 METHOD(ike_sa_t, enable_extension, void,
496 private_ike_sa_t *this, ike_extension_t extension)
497 {
498 this->extensions |= extension;
499 }
500
501 METHOD(ike_sa_t, supports_extension, bool,
502 private_ike_sa_t *this, ike_extension_t extension)
503 {
504 return (this->extensions & extension) != FALSE;
505 }
506
507 METHOD(ike_sa_t, has_condition, bool,
508 private_ike_sa_t *this, ike_condition_t condition)
509 {
510 return (this->conditions & condition) != FALSE;
511 }
512
513 METHOD(ike_sa_t, set_condition, void,
514 private_ike_sa_t *this, ike_condition_t condition, bool enable)
515 {
516 if (has_condition(this, condition) != enable)
517 {
518 if (enable)
519 {
520 this->conditions |= condition;
521 switch (condition)
522 {
523 case COND_NAT_HERE:
524 DBG1(DBG_IKE, "local host is behind NAT, sending keep alives");
525 this->conditions |= COND_NAT_ANY;
526 send_keepalive(this);
527 break;
528 case COND_NAT_THERE:
529 DBG1(DBG_IKE, "remote host is behind NAT");
530 this->conditions |= COND_NAT_ANY;
531 break;
532 case COND_NAT_FAKE:
533 DBG1(DBG_IKE, "faking NAT situation to enforce UDP encapsulation");
534 this->conditions |= COND_NAT_ANY;
535 break;
536 default:
537 break;
538 }
539 }
540 else
541 {
542 this->conditions &= ~condition;
543 switch (condition)
544 {
545 case COND_NAT_HERE:
546 case COND_NAT_FAKE:
547 case COND_NAT_THERE:
548 set_condition(this, COND_NAT_ANY,
549 has_condition(this, COND_NAT_HERE) ||
550 has_condition(this, COND_NAT_THERE) ||
551 has_condition(this, COND_NAT_FAKE));
552 break;
553 default:
554 break;
555 }
556 }
557 }
558 }
559
560 METHOD(ike_sa_t, send_dpd, status_t,
561 private_ike_sa_t *this)
562 {
563 job_t *job;
564 time_t diff, delay;
565
566 if (this->state == IKE_PASSIVE)
567 {
568 return INVALID_STATE;
569 }
570 delay = this->peer_cfg->get_dpd(this->peer_cfg);
571 if (this->task_manager->busy(this->task_manager))
572 {
573 /* an exchange is in the air, no need to start a DPD check */
574 diff = 0;
575 }
576 else
577 {
578 /* check if there was any inbound traffic */
579 time_t last_in, now;
580 last_in = get_use_time(this, TRUE);
581 now = time_monotonic(NULL);
582 diff = now - last_in;
583 if (!delay || diff >= delay)
584 {
585 /* to long ago, initiate dead peer detection */
586 DBG1(DBG_IKE, "sending DPD request");
587 this->task_manager->queue_dpd(this->task_manager);
588 diff = 0;
589 }
590 }
591 /* recheck in "interval" seconds */
592 if (delay)
593 {
594 job = (job_t*)send_dpd_job_create(this->ike_sa_id);
595 lib->scheduler->schedule_job(lib->scheduler, job, delay - diff);
596 }
597 return this->task_manager->initiate(this->task_manager);
598 }
599
600 METHOD(ike_sa_t, get_state, ike_sa_state_t,
601 private_ike_sa_t *this)
602 {
603 return this->state;
604 }
605
606 METHOD(ike_sa_t, set_state, void,
607 private_ike_sa_t *this, ike_sa_state_t state)
608 {
609 DBG2(DBG_IKE, "IKE_SA %s[%d] state change: %N => %N",
610 get_name(this), this->unique_id,
611 ike_sa_state_names, this->state,
612 ike_sa_state_names, state);
613
614 switch (state)
615 {
616 case IKE_ESTABLISHED:
617 {
618 if (this->state == IKE_CONNECTING ||
619 this->state == IKE_PASSIVE)
620 {
621 job_t *job;
622 u_int32_t t;
623
624 /* calculate rekey, reauth and lifetime */
625 this->stats[STAT_ESTABLISHED] = time_monotonic(NULL);
626
627 /* schedule rekeying if we have a time which is smaller than
628 * an already scheduled rekeying */
629 t = this->peer_cfg->get_rekey_time(this->peer_cfg, TRUE);
630 if (t && (this->stats[STAT_REKEY] == 0 ||
631 (this->stats[STAT_REKEY] > t + this->stats[STAT_ESTABLISHED])))
632 {
633 this->stats[STAT_REKEY] = t + this->stats[STAT_ESTABLISHED];
634 job = (job_t*)rekey_ike_sa_job_create(this->ike_sa_id, FALSE);
635 lib->scheduler->schedule_job(lib->scheduler, job, t);
636 DBG1(DBG_IKE, "scheduling rekeying in %ds", t);
637 }
638 t = this->peer_cfg->get_reauth_time(this->peer_cfg, TRUE);
639 if (t && (this->stats[STAT_REAUTH] == 0 ||
640 (this->stats[STAT_REAUTH] > t + this->stats[STAT_ESTABLISHED])))
641 {
642 this->stats[STAT_REAUTH] = t + this->stats[STAT_ESTABLISHED];
643 job = (job_t*)rekey_ike_sa_job_create(this->ike_sa_id, TRUE);
644 lib->scheduler->schedule_job(lib->scheduler, job, t);
645 DBG1(DBG_IKE, "scheduling reauthentication in %ds", t);
646 }
647 t = this->peer_cfg->get_over_time(this->peer_cfg);
648 if (this->stats[STAT_REKEY] || this->stats[STAT_REAUTH])
649 {
650 if (this->stats[STAT_REAUTH] == 0)
651 {
652 this->stats[STAT_DELETE] = this->stats[STAT_REKEY];
653 }
654 else if (this->stats[STAT_REKEY] == 0)
655 {
656 this->stats[STAT_DELETE] = this->stats[STAT_REAUTH];
657 }
658 else
659 {
660 this->stats[STAT_DELETE] = min(this->stats[STAT_REKEY],
661 this->stats[STAT_REAUTH]);
662 }
663 this->stats[STAT_DELETE] += t;
664 t = this->stats[STAT_DELETE] - this->stats[STAT_ESTABLISHED];
665 job = (job_t*)delete_ike_sa_job_create(this->ike_sa_id, TRUE);
666 lib->scheduler->schedule_job(lib->scheduler, job, t);
667 DBG1(DBG_IKE, "maximum IKE_SA lifetime %ds", t);
668 }
669
670 /* start DPD checks */
671 if (this->peer_cfg->get_dpd(this->peer_cfg))
672 {
673 if (supports_extension(this, EXT_DPD))
674 {
675 this->state = state;
676 send_dpd(this);
677 }
678 else
679 {
680 DBG1(DBG_IKE, "DPD not supported by peer, disabled");
681 }
682 }
683 }
684 break;
685 }
686 case IKE_DELETING:
687 {
688 /* delete may fail if a packet gets lost, so set a timeout */
689 job_t *job = (job_t*)delete_ike_sa_job_create(this->ike_sa_id, TRUE);
690 lib->scheduler->schedule_job(lib->scheduler, job,
691 HALF_OPEN_IKE_SA_TIMEOUT);
692 break;
693 }
694 default:
695 break;
696 }
697 charon->bus->ike_state_change(charon->bus, &this->public, state);
698 this->state = state;
699 }
700
701 METHOD(ike_sa_t, reset, void,
702 private_ike_sa_t *this)
703 {
704 /* the responder ID is reset, as peer may choose another one */
705 if (this->ike_sa_id->is_initiator(this->ike_sa_id))
706 {
707 this->ike_sa_id->set_responder_spi(this->ike_sa_id, 0);
708 }
709
710 set_state(this, IKE_CREATED);
711
712 flush_auth_cfgs(this);
713
714 this->keymat->destroy(this->keymat);
715 this->keymat = keymat_create(this->version,
716 this->ike_sa_id->is_initiator(this->ike_sa_id));
717
718 this->task_manager->reset(this->task_manager, 0, 0);
719 }
720
721 METHOD(ike_sa_t, get_keymat, keymat_t*,
722 private_ike_sa_t *this)
723 {
724 return this->keymat;
725 }
726
727 METHOD(ike_sa_t, set_virtual_ip, void,
728 private_ike_sa_t *this, bool local, host_t *ip)
729 {
730 if (local)
731 {
732 DBG1(DBG_IKE, "installing new virtual IP %H", ip);
733 if (hydra->kernel_interface->add_ip(hydra->kernel_interface, ip,
734 this->my_host) == SUCCESS)
735 {
736 if (this->my_virtual_ip)
737 {
738 DBG1(DBG_IKE, "removing old virtual IP %H", this->my_virtual_ip);
739 hydra->kernel_interface->del_ip(hydra->kernel_interface,
740 this->my_virtual_ip);
741 }
742 DESTROY_IF(this->my_virtual_ip);
743 this->my_virtual_ip = ip->clone(ip);
744 }
745 else
746 {
747 DBG1(DBG_IKE, "installing virtual IP %H failed", ip);
748 this->my_virtual_ip = NULL;
749 }
750 }
751 else
752 {
753 DESTROY_IF(this->other_virtual_ip);
754 this->other_virtual_ip = ip->clone(ip);
755 }
756 }
757
758 METHOD(ike_sa_t, get_virtual_ip, host_t*,
759 private_ike_sa_t *this, bool local)
760 {
761 if (local)
762 {
763 return this->my_virtual_ip;
764 }
765 else
766 {
767 return this->other_virtual_ip;
768 }
769 }
770
771 METHOD(ike_sa_t, add_additional_address, void,
772 private_ike_sa_t *this, host_t *host)
773 {
774 this->additional_addresses->insert_last(this->additional_addresses, host);
775 }
776
777 METHOD(ike_sa_t, create_additional_address_enumerator, enumerator_t*,
778 private_ike_sa_t *this)
779 {
780 return this->additional_addresses->create_enumerator(
781 this->additional_addresses);
782 }
783
784 METHOD(ike_sa_t, remove_additional_addresses, void,
785 private_ike_sa_t *this)
786 {
787 enumerator_t *enumerator = create_additional_address_enumerator(this);
788 host_t *host;
789 while (enumerator->enumerate(enumerator, (void**)&host))
790 {
791 this->additional_addresses->remove_at(this->additional_addresses,
792 enumerator);
793 host->destroy(host);
794 }
795 enumerator->destroy(enumerator);
796 }
797
798 METHOD(ike_sa_t, has_mapping_changed, bool,
799 private_ike_sa_t *this, chunk_t hash)
800 {
801 if (this->nat_detection_dest.ptr == NULL)
802 {
803 this->nat_detection_dest = chunk_clone(hash);
804 return FALSE;
805 }
806 if (chunk_equals(hash, this->nat_detection_dest))
807 {
808 return FALSE;
809 }
810 free(this->nat_detection_dest.ptr);
811 this->nat_detection_dest = chunk_clone(hash);
812 return TRUE;
813 }
814
815 METHOD(ike_sa_t, set_pending_updates, void,
816 private_ike_sa_t *this, u_int32_t updates)
817 {
818 this->pending_updates = updates;
819 }
820
821 METHOD(ike_sa_t, get_pending_updates, u_int32_t,
822 private_ike_sa_t *this)
823 {
824 return this->pending_updates;
825 }
826
827 METHOD(ike_sa_t, float_ports, void,
828 private_ike_sa_t *this)
829 {
830 /* do not switch if we have a custom port from MOBIKE/NAT */
831 if (this->my_host->get_port(this->my_host) == IKEV2_UDP_PORT)
832 {
833 this->my_host->set_port(this->my_host, IKEV2_NATT_PORT);
834 }
835 if (this->other_host->get_port(this->other_host) == IKEV2_UDP_PORT)
836 {
837 this->other_host->set_port(this->other_host, IKEV2_NATT_PORT);
838 }
839 }
840
841 METHOD(ike_sa_t, update_hosts, void,
842 private_ike_sa_t *this, host_t *me, host_t *other, bool force)
843 {
844 bool update = FALSE;
845
846 if (me == NULL)
847 {
848 me = this->my_host;
849 }
850 if (other == NULL)
851 {
852 other = this->other_host;
853 }
854
855 /* apply hosts on first received message */
856 if (this->my_host->is_anyaddr(this->my_host) ||
857 this->other_host->is_anyaddr(this->other_host))
858 {
859 set_my_host(this, me->clone(me));
860 set_other_host(this, other->clone(other));
861 update = TRUE;
862 }
863 else
864 {
865 /* update our address in any case */
866 if (!me->equals(me, this->my_host))
867 {
868 set_my_host(this, me->clone(me));
869 update = TRUE;
870 }
871
872 if (!other->equals(other, this->other_host))
873 {
874 /* update others address if we are NOT NATed */
875 if (force || !has_condition(this, COND_NAT_HERE))
876 {
877 set_other_host(this, other->clone(other));
878 update = TRUE;
879 }
880 }
881 }
882
883 /* update all associated CHILD_SAs, if required */
884 if (update)
885 {
886 enumerator_t *enumerator;
887 child_sa_t *child_sa;
888
889 enumerator = this->child_sas->create_enumerator(this->child_sas);
890 while (enumerator->enumerate(enumerator, (void**)&child_sa))
891 {
892 if (child_sa->update(child_sa, this->my_host,
893 this->other_host, this->my_virtual_ip,
894 has_condition(this, COND_NAT_ANY)) == NOT_SUPPORTED)
895 {
896 this->public.rekey_child_sa(&this->public,
897 child_sa->get_protocol(child_sa),
898 child_sa->get_spi(child_sa, TRUE));
899 }
900 }
901 enumerator->destroy(enumerator);
902 }
903 }
904
905 METHOD(ike_sa_t, generate_message, status_t,
906 private_ike_sa_t *this, message_t *message, packet_t **packet)
907 {
908 status_t status;
909
910 if (message->is_encoded(message))
911 { /* already done */
912 *packet = message->get_packet(message);
913 return SUCCESS;
914 }
915 this->stats[STAT_OUTBOUND] = time_monotonic(NULL);
916 message->set_ike_sa_id(message, this->ike_sa_id);
917 charon->bus->message(charon->bus, message, FALSE, TRUE);
918 status = message->generate(message, this->keymat, packet);
919 if (status == SUCCESS)
920 {
921 charon->bus->message(charon->bus, message, FALSE, FALSE);
922 }
923 return status;
924 }
925
926 METHOD(ike_sa_t, set_kmaddress, void,
927 private_ike_sa_t *this, host_t *local, host_t *remote)
928 {
929 DESTROY_IF(this->local_host);
930 DESTROY_IF(this->remote_host);
931 this->local_host = local->clone(local);
932 this->remote_host = remote->clone(remote);
933 }
934
935 #ifdef ME
936 METHOD(ike_sa_t, act_as_mediation_server, void,
937 private_ike_sa_t *this)
938 {
939 charon->mediation_manager->update_sa_id(charon->mediation_manager,
940 this->other_id, this->ike_sa_id);
941 this->is_mediation_server = TRUE;
942 }
943
944 METHOD(ike_sa_t, get_server_reflexive_host, host_t*,
945 private_ike_sa_t *this)
946 {
947 return this->server_reflexive_host;
948 }
949
950 METHOD(ike_sa_t, set_server_reflexive_host, void,
951 private_ike_sa_t *this, host_t *host)
952 {
953 DESTROY_IF(this->server_reflexive_host);
954 this->server_reflexive_host = host;
955 }
956
957 METHOD(ike_sa_t, get_connect_id, chunk_t,
958 private_ike_sa_t *this)
959 {
960 return this->connect_id;
961 }
962
963 METHOD(ike_sa_t, respond, status_t,
964 private_ike_sa_t *this, identification_t *peer_id, chunk_t connect_id)
965 {
966 ike_me_t *task = ike_me_create(&this->public, TRUE);
967 task->respond(task, peer_id, connect_id);
968 this->task_manager->queue_task(this->task_manager, (task_t*)task);
969 return this->task_manager->initiate(this->task_manager);
970 }
971
972 METHOD(ike_sa_t, callback, status_t,
973 private_ike_sa_t *this, identification_t *peer_id)
974 {
975 ike_me_t *task = ike_me_create(&this->public, TRUE);
976 task->callback(task, peer_id);
977 this->task_manager->queue_task(this->task_manager, (task_t*)task);
978 return this->task_manager->initiate(this->task_manager);
979 }
980
981 METHOD(ike_sa_t, relay, status_t,
982 private_ike_sa_t *this, identification_t *requester, chunk_t connect_id,
983 chunk_t connect_key, linked_list_t *endpoints, bool response)
984 {
985 ike_me_t *task = ike_me_create(&this->public, TRUE);
986 task->relay(task, requester, connect_id, connect_key, endpoints, response);
987 this->task_manager->queue_task(this->task_manager, (task_t*)task);
988 return this->task_manager->initiate(this->task_manager);
989 }
990
991 METHOD(ike_sa_t, initiate_mediation, status_t,
992 private_ike_sa_t *this, peer_cfg_t *mediated_cfg)
993 {
994 ike_me_t *task = ike_me_create(&this->public, TRUE);
995 task->connect(task, mediated_cfg->get_peer_id(mediated_cfg));
996 this->task_manager->queue_task(this->task_manager, (task_t*)task);
997 return this->task_manager->initiate(this->task_manager);
998 }
999
1000 METHOD(ike_sa_t, initiate_mediated, status_t,
1001 private_ike_sa_t *this, host_t *me, host_t *other, chunk_t connect_id)
1002 {
1003 set_my_host(this, me->clone(me));
1004 set_other_host(this, other->clone(other));
1005 chunk_free(&this->connect_id);
1006 this->connect_id = chunk_clone(connect_id);
1007 return this->task_manager->initiate(this->task_manager);
1008 }
1009 #endif /* ME */
1010
1011 /**
1012 * Resolve DNS host in configuration
1013 */
1014 static void resolve_hosts(private_ike_sa_t *this)
1015 {
1016 host_t *host;
1017
1018 if (this->remote_host)
1019 {
1020 host = this->remote_host->clone(this->remote_host);
1021 host->set_port(host, IKEV2_UDP_PORT);
1022 }
1023 else
1024 {
1025 host = host_create_from_dns(this->ike_cfg->get_other_addr(this->ike_cfg),
1026 0, this->ike_cfg->get_other_port(this->ike_cfg));
1027 }
1028 if (host)
1029 {
1030 set_other_host(this, host);
1031 }
1032
1033 if (this->local_host)
1034 {
1035 host = this->local_host->clone(this->local_host);
1036 host->set_port(host, IKEV2_UDP_PORT);
1037 }
1038 else
1039 {
1040 int family = 0;
1041
1042 /* use same address family as for other */
1043 if (!this->other_host->is_anyaddr(this->other_host))
1044 {
1045 family = this->other_host->get_family(this->other_host);
1046 }
1047 host = host_create_from_dns(this->ike_cfg->get_my_addr(this->ike_cfg),
1048 family, this->ike_cfg->get_my_port(this->ike_cfg));
1049
1050 if (host && host->is_anyaddr(host) &&
1051 !this->other_host->is_anyaddr(this->other_host))
1052 {
1053 host->destroy(host);
1054 host = hydra->kernel_interface->get_source_addr(
1055 hydra->kernel_interface, this->other_host, NULL);
1056 if (host)
1057 {
1058 host->set_port(host, this->ike_cfg->get_my_port(this->ike_cfg));
1059 }
1060 else
1061 { /* fallback to address family specific %any(6), if configured */
1062 host = host_create_from_dns(
1063 this->ike_cfg->get_my_addr(this->ike_cfg),
1064 0, this->ike_cfg->get_my_port(this->ike_cfg));
1065 }
1066 }
1067 }
1068 if (host)
1069 {
1070 set_my_host(this, host);
1071 }
1072 }
1073
1074 METHOD(ike_sa_t, initiate, status_t,
1075 private_ike_sa_t *this, child_cfg_t *child_cfg, u_int32_t reqid,
1076 traffic_selector_t *tsi, traffic_selector_t *tsr)
1077 {
1078 if (this->state == IKE_CREATED)
1079 {
1080 if (this->my_host->is_anyaddr(this->my_host) ||
1081 this->other_host->is_anyaddr(this->other_host))
1082 {
1083 resolve_hosts(this);
1084 }
1085
1086 if (this->other_host->is_anyaddr(this->other_host)
1087 #ifdef ME
1088 && !this->peer_cfg->get_mediated_by(this->peer_cfg)
1089 #endif /* ME */
1090 )
1091 {
1092 DESTROY_IF(child_cfg);
1093 DBG1(DBG_IKE, "unable to initiate to %%any");
1094 charon->bus->alert(charon->bus, ALERT_PEER_ADDR_FAILED);
1095 return DESTROY_ME;
1096 }
1097
1098 set_condition(this, COND_ORIGINAL_INITIATOR, TRUE);
1099 this->task_manager->queue_ike(this->task_manager);
1100 }
1101
1102 #ifdef ME
1103 if (this->peer_cfg->is_mediation(this->peer_cfg))
1104 {
1105 if (this->state == IKE_ESTABLISHED)
1106 {
1107 /* mediation connection is already established, retrigger state
1108 * change to notify bus listeners */
1109 DBG1(DBG_IKE, "mediation connection is already up");
1110 set_state(this, IKE_ESTABLISHED);
1111 }
1112 DESTROY_IF(child_cfg);
1113 }
1114 else
1115 #endif /* ME */
1116 if (child_cfg)
1117 {
1118 /* normal IKE_SA with CHILD_SA */
1119 this->task_manager->queue_child(this->task_manager, child_cfg, reqid,
1120 tsi, tsr);
1121 #ifdef ME
1122 if (this->peer_cfg->get_mediated_by(this->peer_cfg))
1123 {
1124 /* mediated connection, initiate mediation process */
1125 job_t *job = (job_t*)initiate_mediation_job_create(this->ike_sa_id);
1126 lib->processor->queue_job(lib->processor, job);
1127 return SUCCESS;
1128 }
1129 #endif /* ME */
1130 }
1131
1132 return this->task_manager->initiate(this->task_manager);
1133 }
1134
1135 METHOD(ike_sa_t, process_message, status_t,
1136 private_ike_sa_t *this, message_t *message)
1137 {
1138 status_t status;
1139
1140 if (this->state == IKE_PASSIVE)
1141 { /* do not handle messages in passive state */
1142 return FAILED;
1143 }
1144 if (message->get_major_version(message) != this->version)
1145 {
1146 DBG1(DBG_IKE, "ignoring %N IKEv%u exchange on %N SA",
1147 exchange_type_names, message->get_exchange_type(message),
1148 message->get_major_version(message),
1149 ike_version_names, this->version);
1150 /* TODO-IKEv1: fall back to IKEv1 if we receive an IKEv1
1151 * INVALID_MAJOR_VERSION on an IKEv2 SA. */
1152 return FAILED;
1153 }
1154 status = this->task_manager->process_message(this->task_manager, message);
1155 if (this->flush_auth_cfg && this->state == IKE_ESTABLISHED)
1156 {
1157 /* authentication completed */
1158 this->flush_auth_cfg = FALSE;
1159 flush_auth_cfgs(this);
1160 }
1161 return status;
1162 }
1163
1164 METHOD(ike_sa_t, get_id, ike_sa_id_t*,
1165 private_ike_sa_t *this)
1166 {
1167 return this->ike_sa_id;
1168 }
1169
1170 METHOD(ike_sa_t, get_version, ike_version_t,
1171 private_ike_sa_t *this)
1172 {
1173 return this->version;
1174 }
1175
1176 METHOD(ike_sa_t, get_my_id, identification_t*,
1177 private_ike_sa_t *this)
1178 {
1179 return this->my_id;
1180 }
1181
1182 METHOD(ike_sa_t, set_my_id, void,
1183 private_ike_sa_t *this, identification_t *me)
1184 {
1185 DESTROY_IF(this->my_id);
1186 this->my_id = me;
1187 }
1188
1189 METHOD(ike_sa_t, get_other_id, identification_t*,
1190 private_ike_sa_t *this)
1191 {
1192 return this->other_id;
1193 }
1194
1195 METHOD(ike_sa_t, get_other_eap_id, identification_t*,
1196 private_ike_sa_t *this)
1197 {
1198 identification_t *id = NULL, *current;
1199 enumerator_t *enumerator;
1200 auth_cfg_t *cfg;
1201
1202 enumerator = this->other_auths->create_enumerator(this->other_auths);
1203 while (enumerator->enumerate(enumerator, &cfg))
1204 {
1205 /* prefer EAP-Identity of last round */
1206 current = cfg->get(cfg, AUTH_RULE_EAP_IDENTITY);
1207 if (!current || current->get_type(current) == ID_ANY)
1208 {
1209 current = cfg->get(cfg, AUTH_RULE_XAUTH_IDENTITY);
1210 }
1211 if (!current || current->get_type(current) == ID_ANY)
1212 {
1213 current = cfg->get(cfg, AUTH_RULE_IDENTITY);
1214 }
1215 if (current && current->get_type(current) != ID_ANY)
1216 {
1217 id = current;
1218 continue;
1219 }
1220 }
1221 enumerator->destroy(enumerator);
1222 if (id)
1223 {
1224 return id;
1225 }
1226 return this->other_id;
1227 }
1228
1229 METHOD(ike_sa_t, set_other_id, void,
1230 private_ike_sa_t *this, identification_t *other)
1231 {
1232 DESTROY_IF(this->other_id);
1233 this->other_id = other;
1234 }
1235
1236 METHOD(ike_sa_t, add_child_sa, void,
1237 private_ike_sa_t *this, child_sa_t *child_sa)
1238 {
1239 this->child_sas->insert_last(this->child_sas, child_sa);
1240 }
1241
1242 METHOD(ike_sa_t, get_child_sa, child_sa_t*,
1243 private_ike_sa_t *this, protocol_id_t protocol, u_int32_t spi, bool inbound)
1244 {
1245 enumerator_t *enumerator;
1246 child_sa_t *current, *found = NULL;
1247
1248 enumerator = this->child_sas->create_enumerator(this->child_sas);
1249 while (enumerator->enumerate(enumerator, (void**)&current))
1250 {
1251 if (current->get_spi(current, inbound) == spi &&
1252 current->get_protocol(current) == protocol)
1253 {
1254 found = current;
1255 }
1256 }
1257 enumerator->destroy(enumerator);
1258 return found;
1259 }
1260
1261 METHOD(ike_sa_t, get_child_count, int,
1262 private_ike_sa_t *this)
1263 {
1264 return this->child_sas->get_count(this->child_sas);
1265 }
1266
1267 METHOD(ike_sa_t, create_child_sa_enumerator, enumerator_t*,
1268 private_ike_sa_t *this)
1269 {
1270 return this->child_sas->create_enumerator(this->child_sas);
1271 }
1272
1273 METHOD(ike_sa_t, remove_child_sa, void,
1274 private_ike_sa_t *this, enumerator_t *enumerator)
1275 {
1276 this->child_sas->remove_at(this->child_sas, enumerator);
1277 }
1278
1279 METHOD(ike_sa_t, rekey_child_sa, status_t,
1280 private_ike_sa_t *this, protocol_id_t protocol, u_int32_t spi)
1281 {
1282 if (this->state == IKE_PASSIVE)
1283 {
1284 return INVALID_STATE;
1285 }
1286 this->task_manager->queue_child_rekey(this->task_manager, protocol, spi);
1287 return this->task_manager->initiate(this->task_manager);
1288 }
1289
1290 METHOD(ike_sa_t, delete_child_sa, status_t,
1291 private_ike_sa_t *this, protocol_id_t protocol, u_int32_t spi, bool expired)
1292 {
1293 if (this->state == IKE_PASSIVE)
1294 {
1295 return INVALID_STATE;
1296 }
1297 this->task_manager->queue_child_delete(this->task_manager,
1298 protocol, spi, expired);
1299 return this->task_manager->initiate(this->task_manager);
1300 }
1301
1302 METHOD(ike_sa_t, destroy_child_sa, status_t,
1303 private_ike_sa_t *this, protocol_id_t protocol, u_int32_t spi)
1304 {
1305 enumerator_t *enumerator;
1306 child_sa_t *child_sa;
1307 status_t status = NOT_FOUND;
1308
1309 enumerator = this->child_sas->create_enumerator(this->child_sas);
1310 while (enumerator->enumerate(enumerator, (void**)&child_sa))
1311 {
1312 if (child_sa->get_protocol(child_sa) == protocol &&
1313 child_sa->get_spi(child_sa, TRUE) == spi)
1314 {
1315 this->child_sas->remove_at(this->child_sas, enumerator);
1316 child_sa->destroy(child_sa);
1317 status = SUCCESS;
1318 break;
1319 }
1320 }
1321 enumerator->destroy(enumerator);
1322 return status;
1323 }
1324
1325 METHOD(ike_sa_t, delete_, status_t,
1326 private_ike_sa_t *this)
1327 {
1328 switch (this->state)
1329 {
1330 case IKE_REKEYING:
1331 if (this->version == IKEV1)
1332 { /* SA has been reauthenticated, delete */
1333 charon->bus->ike_updown(charon->bus, &this->public, FALSE);
1334 break;
1335 }
1336 /* FALL */
1337 case IKE_ESTABLISHED:
1338 this->task_manager->queue_ike_delete(this->task_manager);
1339 return this->task_manager->initiate(this->task_manager);
1340 case IKE_CREATED:
1341 DBG1(DBG_IKE, "deleting unestablished IKE_SA");
1342 break;
1343 case IKE_PASSIVE:
1344 break;
1345 default:
1346 DBG1(DBG_IKE, "destroying IKE_SA in state %N "
1347 "without notification", ike_sa_state_names, this->state);
1348 charon->bus->ike_updown(charon->bus, &this->public, FALSE);
1349 break;
1350 }
1351 return DESTROY_ME;
1352 }
1353
1354 METHOD(ike_sa_t, rekey, status_t,
1355 private_ike_sa_t *this)
1356 {
1357 if (this->state == IKE_PASSIVE)
1358 {
1359 return INVALID_STATE;
1360 }
1361 this->task_manager->queue_ike_rekey(this->task_manager);
1362 return this->task_manager->initiate(this->task_manager);
1363 }
1364
1365 METHOD(ike_sa_t, reauth, status_t,
1366 private_ike_sa_t *this)
1367 {
1368 if (this->state == IKE_PASSIVE)
1369 {
1370 return INVALID_STATE;
1371 }
1372 /* we can't reauthenticate as responder when we use EAP or virtual IPs.
1373 * If the peer does not support RFC4478, there is no way to keep the
1374 * IKE_SA up. */
1375 if (!has_condition(this, COND_ORIGINAL_INITIATOR))
1376 {
1377 DBG1(DBG_IKE, "initiator did not reauthenticate as requested");
1378 if (this->other_virtual_ip != NULL ||
1379 has_condition(this, COND_XAUTH_AUTHENTICATED) ||
1380 has_condition(this, COND_EAP_AUTHENTICATED)
1381 #ifdef ME
1382 /* as mediation server we too cannot reauth the IKE_SA */
1383 || this->is_mediation_server
1384 #endif /* ME */
1385 )
1386 {
1387 time_t now = time_monotonic(NULL);
1388
1389 DBG1(DBG_IKE, "IKE_SA will timeout in %V",
1390 &now, &this->stats[STAT_DELETE]);
1391 return FAILED;
1392 }
1393 else
1394 {
1395 DBG1(DBG_IKE, "reauthenticating actively");
1396 }
1397 }
1398 this->task_manager->queue_ike_reauth(this->task_manager);
1399 return this->task_manager->initiate(this->task_manager);
1400 }
1401
1402 METHOD(ike_sa_t, reestablish, status_t,
1403 private_ike_sa_t *this)
1404 {
1405 ike_sa_t *new;
1406 host_t *host;
1407 action_t action;
1408 enumerator_t *enumerator;
1409 child_sa_t *child_sa;
1410 child_cfg_t *child_cfg;
1411 bool restart = FALSE;
1412 status_t status = FAILED;
1413
1414 /* check if we have children to keep up at all */
1415 enumerator = this->child_sas->create_enumerator(this->child_sas);
1416 while (enumerator->enumerate(enumerator, (void**)&child_sa))
1417 {
1418 if (this->state == IKE_DELETING)
1419 {
1420 action = child_sa->get_close_action(child_sa);
1421 }
1422 else
1423 {
1424 action = child_sa->get_dpd_action(child_sa);
1425 }
1426 switch (action)
1427 {
1428 case ACTION_RESTART:
1429 restart = TRUE;
1430 break;
1431 case ACTION_ROUTE:
1432 charon->traps->install(charon->traps, this->peer_cfg,
1433 child_sa->get_config(child_sa));
1434 break;
1435 default:
1436 break;
1437 }
1438 }
1439 enumerator->destroy(enumerator);
1440 #ifdef ME
1441 /* mediation connections have no children, keep them up anyway */
1442 if (this->peer_cfg->is_mediation(this->peer_cfg))
1443 {
1444 restart = TRUE;
1445 }
1446 #endif /* ME */
1447 if (!restart)
1448 {
1449 return FAILED;
1450 }
1451
1452 /* check if we are able to reestablish this IKE_SA */
1453 if (!has_condition(this, COND_ORIGINAL_INITIATOR) &&
1454 (this->other_virtual_ip != NULL ||
1455 has_condition(this, COND_EAP_AUTHENTICATED)
1456 #ifdef ME
1457 || this->is_mediation_server
1458 #endif /* ME */
1459 ))
1460 {
1461 DBG1(DBG_IKE, "unable to reestablish IKE_SA due to asymmetric setup");
1462 return FAILED;
1463 }
1464
1465 new = charon->ike_sa_manager->checkout_new(charon->ike_sa_manager,
1466 this->version, TRUE);
1467 if (!new)
1468 {
1469 return FAILED;
1470 }
1471 new->set_peer_cfg(new, this->peer_cfg);
1472 host = this->other_host;
1473 new->set_other_host(new, host->clone(host));
1474 host = this->my_host;
1475 new->set_my_host(new, host->clone(host));
1476 /* if we already have a virtual IP, we reuse it */
1477 host = this->my_virtual_ip;
1478 if (host)
1479 {
1480 new->set_virtual_ip(new, TRUE, host);
1481 }
1482
1483 #ifdef ME
1484 if (this->peer_cfg->is_mediation(this->peer_cfg))
1485 {
1486 status = new->initiate(new, NULL, 0, NULL, NULL);
1487 }
1488 else
1489 #endif /* ME */
1490 {
1491 enumerator = this->child_sas->create_enumerator(this->child_sas);
1492 while (enumerator->enumerate(enumerator, (void**)&child_sa))
1493 {
1494 if (this->state == IKE_DELETING)
1495 {
1496 action = child_sa->get_close_action(child_sa);
1497 }
1498 else
1499 {
1500 action = child_sa->get_dpd_action(child_sa);
1501 }
1502 switch (action)
1503 {
1504 case ACTION_RESTART:
1505 child_cfg = child_sa->get_config(child_sa);
1506 DBG1(DBG_IKE, "restarting CHILD_SA %s",
1507 child_cfg->get_name(child_cfg));
1508 child_cfg->get_ref(child_cfg);
1509 status = new->initiate(new, child_cfg, 0, NULL, NULL);
1510 break;
1511 default:
1512 continue;
1513 }
1514 if (status == DESTROY_ME)
1515 {
1516 break;
1517 }
1518 }
1519 enumerator->destroy(enumerator);
1520 }
1521
1522 if (status == DESTROY_ME)
1523 {
1524 charon->ike_sa_manager->checkin_and_destroy(charon->ike_sa_manager, new);
1525 status = FAILED;
1526 }
1527 else
1528 {
1529 charon->ike_sa_manager->checkin(charon->ike_sa_manager, new);
1530 status = SUCCESS;
1531 }
1532 charon->bus->set_sa(charon->bus, &this->public);
1533 return status;
1534 }
1535
1536 METHOD(ike_sa_t, retransmit, status_t,
1537 private_ike_sa_t *this, u_int32_t message_id)
1538 {
1539 if (this->state == IKE_PASSIVE)
1540 {
1541 return INVALID_STATE;
1542 }
1543 this->stats[STAT_OUTBOUND] = time_monotonic(NULL);
1544 if (this->task_manager->retransmit(this->task_manager, message_id) != SUCCESS)
1545 {
1546 /* send a proper signal to brief interested bus listeners */
1547 switch (this->state)
1548 {
1549 case IKE_CONNECTING:
1550 {
1551 /* retry IKE_SA_INIT/Main Mode if we have multiple keyingtries */
1552 u_int32_t tries = this->peer_cfg->get_keyingtries(this->peer_cfg);
1553 this->keyingtry++;
1554 if (tries == 0 || tries > this->keyingtry)
1555 {
1556 DBG1(DBG_IKE, "peer not responding, trying again (%d/%d)",
1557 this->keyingtry + 1, tries);
1558 reset(this);
1559 this->task_manager->queue_ike(this->task_manager);
1560 return this->task_manager->initiate(this->task_manager);
1561 }
1562 DBG1(DBG_IKE, "establishing IKE_SA failed, peer not responding");
1563 break;
1564 }
1565 case IKE_DELETING:
1566 DBG1(DBG_IKE, "proper IKE_SA delete failed, peer not responding");
1567 break;
1568 case IKE_REKEYING:
1569 DBG1(DBG_IKE, "rekeying IKE_SA failed, peer not responding");
1570 /* FALL */
1571 default:
1572 reestablish(this);
1573 break;
1574 }
1575 return DESTROY_ME;
1576 }
1577 return SUCCESS;
1578 }
1579
1580 METHOD(ike_sa_t, set_auth_lifetime, void,
1581 private_ike_sa_t *this, u_int32_t lifetime)
1582 {
1583 u_int32_t reduction = this->peer_cfg->get_over_time(this->peer_cfg);
1584 u_int32_t reauth_time = time_monotonic(NULL) + lifetime - reduction;
1585
1586 if (lifetime < reduction)
1587 {
1588 DBG1(DBG_IKE, "received AUTH_LIFETIME of %ds, starting reauthentication",
1589 lifetime);
1590 lib->processor->queue_job(lib->processor,
1591 (job_t*)rekey_ike_sa_job_create(this->ike_sa_id, TRUE));
1592 }
1593 else if (this->stats[STAT_REAUTH] == 0 ||
1594 this->stats[STAT_REAUTH] > reauth_time)
1595 {
1596 this->stats[STAT_REAUTH] = reauth_time;
1597 DBG1(DBG_IKE, "received AUTH_LIFETIME of %ds, scheduling reauthentication"
1598 " in %ds", lifetime, lifetime - reduction);
1599 lib->scheduler->schedule_job(lib->scheduler,
1600 (job_t*)rekey_ike_sa_job_create(this->ike_sa_id, TRUE),
1601 lifetime - reduction);
1602 }
1603 else
1604 {
1605 DBG1(DBG_IKE, "received AUTH_LIFETIME of %ds, "
1606 "reauthentication already scheduled in %ds", lifetime,
1607 this->stats[STAT_REAUTH] - time_monotonic(NULL));
1608 }
1609 }
1610
1611 /**
1612 * Check if the current combination of source and destination address is still
1613 * valid.
1614 */
1615 static bool is_current_path_valid(private_ike_sa_t *this)
1616 {
1617 bool valid = FALSE;
1618 host_t *src;
1619 src = hydra->kernel_interface->get_source_addr(hydra->kernel_interface,
1620 this->other_host, this->my_host);
1621 if (src)
1622 {
1623 if (src->ip_equals(src, this->my_host))
1624 {
1625 valid = TRUE;
1626 }
1627 src->destroy(src);
1628 }
1629 return valid;
1630 }
1631
1632 /**
1633 * Check if we have any path avialable for this IKE SA.
1634 */
1635 static bool is_any_path_valid(private_ike_sa_t *this)
1636 {
1637 bool valid = FALSE;
1638 enumerator_t *enumerator;
1639 host_t *src, *addr;
1640 DBG1(DBG_IKE, "old path is not available anymore, try to find another");
1641 src = hydra->kernel_interface->get_source_addr(hydra->kernel_interface,
1642 this->other_host, NULL);
1643 if (!src)
1644 {
1645 enumerator = this->additional_addresses->create_enumerator(
1646 this->additional_addresses);
1647 while (enumerator->enumerate(enumerator, &addr))
1648 {
1649 DBG1(DBG_IKE, "looking for a route to %H ...", addr);
1650 src = hydra->kernel_interface->get_source_addr(
1651 hydra->kernel_interface, addr, NULL);
1652 if (src)
1653 {
1654 break;
1655 }
1656 }
1657 enumerator->destroy(enumerator);
1658 }
1659 if (src)
1660 {
1661 valid = TRUE;
1662 src->destroy(src);
1663 }
1664 return valid;
1665 }
1666
1667 METHOD(ike_sa_t, roam, status_t,
1668 private_ike_sa_t *this, bool address)
1669 {
1670 switch (this->state)
1671 {
1672 case IKE_CREATED:
1673 case IKE_DELETING:
1674 case IKE_DESTROYING:
1675 case IKE_PASSIVE:
1676 return SUCCESS;
1677 default:
1678 break;
1679 }
1680
1681 /* keep existing path if possible */
1682 if (is_current_path_valid(this))
1683 {
1684 DBG2(DBG_IKE, "keeping connection path %H - %H",
1685 this->my_host, this->other_host);
1686 set_condition(this, COND_STALE, FALSE);
1687
1688 if (supports_extension(this, EXT_MOBIKE) && address)
1689 { /* if any addresses changed, send an updated list */
1690 DBG1(DBG_IKE, "sending address list update using MOBIKE");
1691 this->task_manager->queue_mobike(this->task_manager, FALSE, TRUE);
1692 return this->task_manager->initiate(this->task_manager);
1693 }
1694 return SUCCESS;
1695 }
1696
1697 if (!is_any_path_valid(this))
1698 {
1699 DBG1(DBG_IKE, "no route found to reach %H, MOBIKE update deferred",
1700 this->other_host);
1701 set_condition(this, COND_STALE, TRUE);
1702 return SUCCESS;
1703 }
1704 set_condition(this, COND_STALE, FALSE);
1705
1706 /* update addresses with mobike, if supported ... */
1707 if (supports_extension(this, EXT_MOBIKE))
1708 {
1709 if (!has_condition(this, COND_ORIGINAL_INITIATOR))
1710 { /* responder updates the peer about changed address config */
1711 DBG1(DBG_IKE, "sending address list update using MOBIKE, "
1712 "implicitly requesting an address change");
1713 address = TRUE;
1714 }
1715 else
1716 {
1717 DBG1(DBG_IKE, "requesting address change using MOBIKE");
1718 }
1719 this->task_manager->queue_mobike(this->task_manager, TRUE, address);
1720 return this->task_manager->initiate(this->task_manager);
1721 }
1722
1723 /* ... reauth if not */
1724 if (!has_condition(this, COND_ORIGINAL_INITIATOR))
1725 { /* responder does not reauthenticate */
1726 set_condition(this, COND_STALE, TRUE);
1727 return SUCCESS;
1728 }
1729 DBG1(DBG_IKE, "reauthenticating IKE_SA due to address change");
1730 return reauth(this);
1731 }
1732
1733 METHOD(ike_sa_t, add_configuration_attribute, void,
1734 private_ike_sa_t *this, attribute_handler_t *handler,
1735 configuration_attribute_type_t type, chunk_t data)
1736 {
1737 attribute_entry_t *entry = malloc_thing(attribute_entry_t);
1738
1739 entry->handler = handler;
1740 entry->type = type;
1741 entry->data = chunk_clone(data);
1742
1743 this->attributes->insert_last(this->attributes, entry);
1744 }
1745
1746 METHOD(ike_sa_t, create_task_enumerator, enumerator_t*,
1747 private_ike_sa_t *this, task_queue_t queue)
1748 {
1749 return this->task_manager->create_task_enumerator(this->task_manager, queue);
1750 }
1751
1752 METHOD(ike_sa_t, queue_task, void,
1753 private_ike_sa_t *this, task_t *task)
1754 {
1755 this->task_manager->queue_task(this->task_manager, task);
1756 }
1757
1758 METHOD(ike_sa_t, inherit, void,
1759 private_ike_sa_t *this, ike_sa_t *other_public)
1760 {
1761 private_ike_sa_t *other = (private_ike_sa_t*)other_public;
1762 child_sa_t *child_sa;
1763 attribute_entry_t *entry;
1764 enumerator_t *enumerator;
1765 auth_cfg_t *cfg;
1766
1767 /* apply hosts and ids */
1768 this->my_host->destroy(this->my_host);
1769 this->other_host->destroy(this->other_host);
1770 this->my_id->destroy(this->my_id);
1771 this->other_id->destroy(this->other_id);
1772 this->my_host = other->my_host->clone(other->my_host);
1773 this->other_host = other->other_host->clone(other->other_host);
1774 this->my_id = other->my_id->clone(other->my_id);
1775 this->other_id = other->other_id->clone(other->other_id);
1776
1777 /* apply virtual assigned IPs... */
1778 if (other->my_virtual_ip)
1779 {
1780 this->my_virtual_ip = other->my_virtual_ip;
1781 other->my_virtual_ip = NULL;
1782 }
1783 if (other->other_virtual_ip)
1784 {
1785 this->other_virtual_ip = other->other_virtual_ip;
1786 other->other_virtual_ip = NULL;
1787 }
1788
1789 /* authentication information */
1790 enumerator = other->my_auths->create_enumerator(other->my_auths);
1791 while (enumerator->enumerate(enumerator, &cfg))
1792 {
1793 this->my_auths->insert_last(this->my_auths, cfg->clone(cfg));
1794 }
1795 enumerator->destroy(enumerator);
1796 enumerator = other->other_auths->create_enumerator(other->other_auths);
1797 while (enumerator->enumerate(enumerator, &cfg))
1798 {
1799 this->other_auths->insert_last(this->other_auths, cfg->clone(cfg));
1800 }
1801 enumerator->destroy(enumerator);
1802
1803 /* ... and configuration attributes */
1804 while (other->attributes->remove_last(other->attributes,
1805 (void**)&entry) == SUCCESS)
1806 {
1807 this->attributes->insert_first(this->attributes, entry);
1808 }
1809
1810 /* inherit all conditions */
1811 this->conditions = other->conditions;
1812 if (this->conditions & COND_NAT_HERE)
1813 {
1814 send_keepalive(this);
1815 }
1816
1817 #ifdef ME
1818 if (other->is_mediation_server)
1819 {
1820 act_as_mediation_server(this);
1821 }
1822 else if (other->server_reflexive_host)
1823 {
1824 this->server_reflexive_host = other->server_reflexive_host->clone(
1825 other->server_reflexive_host);
1826 }
1827 #endif /* ME */
1828
1829 /* adopt all children */
1830 while (other->child_sas->remove_last(other->child_sas,
1831 (void**)&child_sa) == SUCCESS)
1832 {
1833 this->child_sas->insert_first(this->child_sas, (void*)child_sa);
1834 }
1835
1836 /* move pending tasks to the new IKE_SA */
1837 this->task_manager->adopt_tasks(this->task_manager, other->task_manager);
1838
1839 /* reauthentication timeout survives a rekeying */
1840 if (other->stats[STAT_REAUTH])
1841 {
1842 time_t reauth, delete, now = time_monotonic(NULL);
1843
1844 this->stats[STAT_REAUTH] = other->stats[STAT_REAUTH];
1845 reauth = this->stats[STAT_REAUTH] - now;
1846 delete = reauth + this->peer_cfg->get_over_time(this->peer_cfg);
1847 this->stats[STAT_DELETE] = this->stats[STAT_REAUTH] + delete;
1848 DBG1(DBG_IKE, "rescheduling reauthentication in %ds after rekeying, "
1849 "lifetime reduced to %ds", reauth, delete);
1850 lib->scheduler->schedule_job(lib->scheduler,
1851 (job_t*)rekey_ike_sa_job_create(this->ike_sa_id, TRUE), reauth);
1852 lib->scheduler->schedule_job(lib->scheduler,
1853 (job_t*)delete_ike_sa_job_create(this->ike_sa_id, TRUE), delete);
1854 }
1855 }
1856
1857 METHOD(ike_sa_t, destroy, void,
1858 private_ike_sa_t *this)
1859 {
1860 attribute_entry_t *entry;
1861
1862 charon->bus->set_sa(charon->bus, &this->public);
1863
1864 set_state(this, IKE_DESTROYING);
1865 DESTROY_IF(this->task_manager);
1866
1867 /* remove attributes first, as we pass the IKE_SA to the handler */
1868 while (this->attributes->remove_last(this->attributes,
1869 (void**)&entry) == SUCCESS)
1870 {
1871 hydra->attributes->release(hydra->attributes, entry->handler,
1872 this->other_id, entry->type, entry->data);
1873 free(entry->data.ptr);
1874 free(entry);
1875 }
1876 this->attributes->destroy(this->attributes);
1877
1878 this->child_sas->destroy_offset(this->child_sas, offsetof(child_sa_t, destroy));
1879
1880 /* unset SA after here to avoid usage by the listeners */
1881 charon->bus->set_sa(charon->bus, NULL);
1882
1883 DESTROY_IF(this->keymat);
1884
1885 if (this->my_virtual_ip)
1886 {
1887 hydra->kernel_interface->del_ip(hydra->kernel_interface,
1888 this->my_virtual_ip);
1889 this->my_virtual_ip->destroy(this->my_virtual_ip);
1890 }
1891 if (this->other_virtual_ip)
1892 {
1893 if (this->peer_cfg && this->peer_cfg->get_pool(this->peer_cfg))
1894 {
1895 hydra->attributes->release_address(hydra->attributes,
1896 this->peer_cfg->get_pool(this->peer_cfg),
1897 this->other_virtual_ip, get_other_eap_id(this));
1898 }
1899 this->other_virtual_ip->destroy(this->other_virtual_ip);
1900 }
1901 this->additional_addresses->destroy_offset(this->additional_addresses,
1902 offsetof(host_t, destroy));
1903 #ifdef ME
1904 if (this->is_mediation_server)
1905 {
1906 charon->mediation_manager->remove(charon->mediation_manager,
1907 this->ike_sa_id);
1908 }
1909 DESTROY_IF(this->server_reflexive_host);
1910 chunk_free(&this->connect_id);
1911 #endif /* ME */
1912 free(this->nat_detection_dest.ptr);
1913
1914 DESTROY_IF(this->my_host);
1915 DESTROY_IF(this->other_host);
1916 DESTROY_IF(this->my_id);
1917 DESTROY_IF(this->other_id);
1918 DESTROY_IF(this->local_host);
1919 DESTROY_IF(this->remote_host);
1920
1921 DESTROY_IF(this->ike_cfg);
1922 DESTROY_IF(this->peer_cfg);
1923 DESTROY_IF(this->proposal);
1924 this->my_auth->destroy(this->my_auth);
1925 this->other_auth->destroy(this->other_auth);
1926 this->my_auths->destroy_offset(this->my_auths,
1927 offsetof(auth_cfg_t, destroy));
1928 this->other_auths->destroy_offset(this->other_auths,
1929 offsetof(auth_cfg_t, destroy));
1930
1931 this->ike_sa_id->destroy(this->ike_sa_id);
1932 free(this);
1933 }
1934
1935 /*
1936 * Described in header.
1937 */
1938 ike_sa_t * ike_sa_create(ike_sa_id_t *ike_sa_id, bool initiator,
1939 ike_version_t version)
1940 {
1941 private_ike_sa_t *this;
1942 static u_int32_t unique_id = 0;
1943
1944 if (version == IKE_ANY)
1945 { /* prefer IKEv2 if protocol not specified */
1946 #ifdef USE_IKEV2
1947 version = IKEV2;
1948 #else
1949 version = IKEV1;
1950 #endif
1951 }
1952
1953 INIT(this,
1954 .public = {
1955 .get_version = _get_version,
1956 .get_state = _get_state,
1957 .set_state = _set_state,
1958 .get_name = _get_name,
1959 .get_statistic = _get_statistic,
1960 .set_statistic = _set_statistic,
1961 .process_message = _process_message,
1962 .initiate = _initiate,
1963 .get_ike_cfg = _get_ike_cfg,
1964 .set_ike_cfg = _set_ike_cfg,
1965 .get_peer_cfg = _get_peer_cfg,
1966 .set_peer_cfg = _set_peer_cfg,
1967 .get_auth_cfg = _get_auth_cfg,
1968 .create_auth_cfg_enumerator = _create_auth_cfg_enumerator,
1969 .add_auth_cfg = _add_auth_cfg,
1970 .get_proposal = _get_proposal,
1971 .set_proposal = _set_proposal,
1972 .get_id = _get_id,
1973 .get_my_host = _get_my_host,
1974 .set_my_host = _set_my_host,
1975 .get_other_host = _get_other_host,
1976 .set_other_host = _set_other_host,
1977 .set_message_id = _set_message_id,
1978 .float_ports = _float_ports,
1979 .update_hosts = _update_hosts,
1980 .get_my_id = _get_my_id,
1981 .set_my_id = _set_my_id,
1982 .get_other_id = _get_other_id,
1983 .set_other_id = _set_other_id,
1984 .get_other_eap_id = _get_other_eap_id,
1985 .enable_extension = _enable_extension,
1986 .supports_extension = _supports_extension,
1987 .set_condition = _set_condition,
1988 .has_condition = _has_condition,
1989 .set_pending_updates = _set_pending_updates,
1990 .get_pending_updates = _get_pending_updates,
1991 .create_additional_address_enumerator = _create_additional_address_enumerator,
1992 .add_additional_address = _add_additional_address,
1993 .remove_additional_addresses = _remove_additional_addresses,
1994 .has_mapping_changed = _has_mapping_changed,
1995 .retransmit = _retransmit,
1996 .delete = _delete_,
1997 .destroy = _destroy,
1998 .send_dpd = _send_dpd,
1999 .send_keepalive = _send_keepalive,
2000 .get_keymat = _get_keymat,
2001 .add_child_sa = _add_child_sa,
2002 .get_child_sa = _get_child_sa,
2003 .get_child_count = _get_child_count,
2004 .create_child_sa_enumerator = _create_child_sa_enumerator,
2005 .remove_child_sa = _remove_child_sa,
2006 .rekey_child_sa = _rekey_child_sa,
2007 .delete_child_sa = _delete_child_sa,
2008 .destroy_child_sa = _destroy_child_sa,
2009 .rekey = _rekey,
2010 .reauth = _reauth,
2011 .reestablish = _reestablish,
2012 .set_auth_lifetime = _set_auth_lifetime,
2013 .roam = _roam,
2014 .inherit = _inherit,
2015 .generate_message = _generate_message,
2016 .reset = _reset,
2017 .get_unique_id = _get_unique_id,
2018 .set_virtual_ip = _set_virtual_ip,
2019 .get_virtual_ip = _get_virtual_ip,
2020 .add_configuration_attribute = _add_configuration_attribute,
2021 .set_kmaddress = _set_kmaddress,
2022 .create_task_enumerator = _create_task_enumerator,
2023 .queue_task = _queue_task,
2024 #ifdef ME
2025 .act_as_mediation_server = _act_as_mediation_server,
2026 .get_server_reflexive_host = _get_server_reflexive_host,
2027 .set_server_reflexive_host = _set_server_reflexive_host,
2028 .get_connect_id = _get_connect_id,
2029 .initiate_mediation = _initiate_mediation,
2030 .initiate_mediated = _initiate_mediated,
2031 .relay = _relay,
2032 .callback = _callback,
2033 .respond = _respond,
2034 #endif /* ME */
2035 },
2036 .ike_sa_id = ike_sa_id->clone(ike_sa_id),
2037 .version = version,
2038 .child_sas = linked_list_create(),
2039 .my_host = host_create_any(AF_INET),
2040 .other_host = host_create_any(AF_INET),
2041 .my_id = identification_create_from_encoding(ID_ANY, chunk_empty),
2042 .other_id = identification_create_from_encoding(ID_ANY, chunk_empty),
2043 .keymat = keymat_create(version, initiator),
2044 .state = IKE_CREATED,
2045 .stats[STAT_INBOUND] = time_monotonic(NULL),
2046 .stats[STAT_OUTBOUND] = time_monotonic(NULL),
2047 .my_auth = auth_cfg_create(),
2048 .other_auth = auth_cfg_create(),
2049 .my_auths = linked_list_create(),
2050 .other_auths = linked_list_create(),
2051 .unique_id = ++unique_id,
2052 .additional_addresses = linked_list_create(),
2053 .attributes = linked_list_create(),
2054 .keepalive_interval = lib->settings->get_time(lib->settings,
2055 "charon.keep_alive", KEEPALIVE_INTERVAL),
2056 .flush_auth_cfg = lib->settings->get_bool(lib->settings,
2057 "charon.flush_auth_cfg", FALSE),
2058 );
2059
2060 if (version == IKEV2)
2061 { /* always supported with IKEv2 */
2062 enable_extension(this, EXT_DPD);
2063 }
2064
2065 this->task_manager = task_manager_create(&this->public);
2066 this->my_host->set_port(this->my_host, IKEV2_UDP_PORT);
2067
2068 if (!this->task_manager || !this->keymat)
2069 {
2070 DBG1(DBG_IKE, "IKE version %d not supported", this->version);
2071 destroy(this);
2072 return NULL;
2073 }
2074 return &this->public;
2075 }