Don't query the policy usetime if there was no traffic on the SA.
[strongswan.git] / src / charon / sa / child_sa.c
1 /*
2 * Copyright (C) 2006-2008 Tobias Brunner
3 * Copyright (C) 2005-2008 Martin Willi
4 * Copyright (C) 2006 Daniel Roethlisberger
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 #define _GNU_SOURCE
20 #include "child_sa.h"
21
22 #include <stdio.h>
23 #include <string.h>
24 #include <time.h>
25
26 #include <daemon.h>
27
28 ENUM(child_sa_state_names, CHILD_CREATED, CHILD_DESTROYING,
29 "CREATED",
30 "ROUTED",
31 "INSTALLING",
32 "INSTALLED",
33 "UPDATING",
34 "REKEYING",
35 "DELETING",
36 "DESTROYING",
37 );
38
39 typedef struct private_child_sa_t private_child_sa_t;
40
41 /**
42 * Private data of a child_sa_t object.
43 */
44 struct private_child_sa_t {
45 /**
46 * Public interface of child_sa_t.
47 */
48 child_sa_t public;
49
50 /**
51 * address of us
52 */
53 host_t *my_addr;
54
55 /**
56 * address of remote
57 */
58 host_t *other_addr;
59
60 /**
61 * our actually used SPI, 0 if unused
62 */
63 u_int32_t my_spi;
64
65 /**
66 * others used SPI, 0 if unused
67 */
68 u_int32_t other_spi;
69
70 /**
71 * our Compression Parameter Index (CPI) used, 0 if unused
72 */
73 u_int16_t my_cpi;
74
75 /**
76 * others Compression Parameter Index (CPI) used, 0 if unused
77 */
78 u_int16_t other_cpi;
79
80 /**
81 * List for local traffic selectors
82 */
83 linked_list_t *my_ts;
84
85 /**
86 * List for remote traffic selectors
87 */
88 linked_list_t *other_ts;
89
90 /**
91 * Protocol used to protect this SA, ESP|AH
92 */
93 protocol_id_t protocol;
94
95 /**
96 * reqid used for this child_sa
97 */
98 u_int32_t reqid;
99
100 /**
101 * absolute time when rekeying is scheduled
102 */
103 time_t rekey_time;
104
105 /**
106 * absolute time when the SA expires
107 */
108 time_t expire_time;
109
110 /**
111 * state of the CHILD_SA
112 */
113 child_sa_state_t state;
114
115 /**
116 * Specifies if UDP encapsulation is enabled (NAT traversal)
117 */
118 bool encap;
119
120 /**
121 * Specifies the IPComp transform used (IPCOMP_NONE if disabled)
122 */
123 ipcomp_transform_t ipcomp;
124
125 /**
126 * mode this SA uses, tunnel/transport
127 */
128 ipsec_mode_t mode;
129
130 /**
131 * selected proposal
132 */
133 proposal_t *proposal;
134
135 /**
136 * config used to create this child
137 */
138 child_cfg_t *config;
139
140 /**
141 * time of last use in seconds (inbound)
142 */
143 u_int32_t my_usetime;
144
145 /**
146 * time of last use in seconds (outbound)
147 */
148 u_int32_t other_usetime;
149
150 /**
151 * last number of inbound bytes
152 */
153 u_int64_t my_usebytes;
154
155 /**
156 * last number of outbound bytes
157 */
158 u_int64_t other_usebytes;
159 };
160
161 /**
162 * Implementation of child_sa_t.get_name
163 */
164 static char *get_name(private_child_sa_t *this)
165 {
166 return this->config->get_name(this->config);
167 }
168
169 /**
170 * Implements child_sa_t.get_reqid
171 */
172 static u_int32_t get_reqid(private_child_sa_t *this)
173 {
174 return this->reqid;
175 }
176
177 /**
178 * Implements child_sa_t.get_config
179 */
180 static child_cfg_t* get_config(private_child_sa_t *this)
181 {
182 return this->config;
183 }
184
185 /**
186 * Implements child_sa_t.set_state
187 */
188 static void set_state(private_child_sa_t *this, child_sa_state_t state)
189 {
190 charon->bus->child_state_change(charon->bus, &this->public, state);
191 this->state = state;
192 }
193
194 /**
195 * Implements child_sa_t.get_state
196 */
197 static child_sa_state_t get_state(private_child_sa_t *this)
198 {
199 return this->state;
200 }
201
202 /**
203 * Implements child_sa_t.get_spi
204 */
205 u_int32_t get_spi(private_child_sa_t *this, bool inbound)
206 {
207 return inbound ? this->my_spi : this->other_spi;
208 }
209
210 /**
211 * Implements child_sa_t.get_cpi
212 */
213 u_int16_t get_cpi(private_child_sa_t *this, bool inbound)
214 {
215 return inbound ? this->my_cpi : this->other_cpi;
216 }
217
218 /**
219 * Implements child_sa_t.get_protocol
220 */
221 protocol_id_t get_protocol(private_child_sa_t *this)
222 {
223 return this->protocol;
224 }
225
226 /**
227 * Implementation of child_sa_t.set_protocol
228 */
229 static void set_protocol(private_child_sa_t *this, protocol_id_t protocol)
230 {
231 this->protocol = protocol;
232 }
233
234 /**
235 * Implementation of child_sa_t.get_mode
236 */
237 static ipsec_mode_t get_mode(private_child_sa_t *this)
238 {
239 return this->mode;
240 }
241
242 /**
243 * Implementation of child_sa_t.set_mode
244 */
245 static void set_mode(private_child_sa_t *this, ipsec_mode_t mode)
246 {
247 this->mode = mode;
248 }
249
250 /**
251 * Implementation of child_sa_t.has_encap
252 */
253 static bool has_encap(private_child_sa_t *this)
254 {
255 return this->encap;
256 }
257
258 /**
259 * Implementation of child_sa_t.get_ipcomp
260 */
261 static ipcomp_transform_t get_ipcomp(private_child_sa_t *this)
262 {
263 return this->ipcomp;
264 }
265
266 /**
267 * Implementation of child_sa_t.set_ipcomp.
268 */
269 static void set_ipcomp(private_child_sa_t *this, ipcomp_transform_t ipcomp)
270 {
271 this->ipcomp = ipcomp;
272 }
273
274 /**
275 * Implementation of child_sa_t.get_proposal
276 */
277 static proposal_t* get_proposal(private_child_sa_t *this)
278 {
279 return this->proposal;
280 }
281
282 /**
283 * Implementation of child_sa_t.set_proposal
284 */
285 static void set_proposal(private_child_sa_t *this, proposal_t *proposal)
286 {
287 this->proposal = proposal->clone(proposal);
288 }
289
290 /**
291 * Implementation of child_sa_t.get_traffic_selectors.
292 */
293 static linked_list_t *get_traffic_selectors(private_child_sa_t *this, bool local)
294 {
295 return local ? this->my_ts : this->other_ts;
296 }
297
298 typedef struct policy_enumerator_t policy_enumerator_t;
299
300 /**
301 * Private policy enumerator
302 */
303 struct policy_enumerator_t {
304 /** implements enumerator_t */
305 enumerator_t public;
306 /** enumerator over own TS */
307 enumerator_t *mine;
308 /** enumerator over others TS */
309 enumerator_t *other;
310 /** list of others TS, to recreate enumerator */
311 linked_list_t *list;
312 /** currently enumerating TS for "me" side */
313 traffic_selector_t *ts;
314 };
315
316 /**
317 * enumerator function of create_policy_enumerator()
318 */
319 static bool policy_enumerate(policy_enumerator_t *this,
320 traffic_selector_t **my_out, traffic_selector_t **other_out)
321 {
322 traffic_selector_t *other_ts;
323
324 while (this->ts || this->mine->enumerate(this->mine, &this->ts))
325 {
326 if (!this->other->enumerate(this->other, &other_ts))
327 { /* end of others list, restart with new of mine */
328 this->other->destroy(this->other);
329 this->other = this->list->create_enumerator(this->list);
330 this->ts = NULL;
331 continue;
332 }
333 if (this->ts->get_type(this->ts) != other_ts->get_type(other_ts))
334 { /* family mismatch */
335 continue;
336 }
337 if (this->ts->get_protocol(this->ts) &&
338 other_ts->get_protocol(other_ts) &&
339 this->ts->get_protocol(this->ts) != other_ts->get_protocol(other_ts))
340 { /* protocol mismatch */
341 continue;
342 }
343 *my_out = this->ts;
344 *other_out = other_ts;
345 return TRUE;
346 }
347 return FALSE;
348 }
349
350 /**
351 * destroy function of create_policy_enumerator()
352 */
353 static void policy_destroy(policy_enumerator_t *this)
354 {
355 this->mine->destroy(this->mine);
356 this->other->destroy(this->other);
357 free(this);
358 }
359
360 /**
361 * Implementation of child_sa_t.create_policy_enumerator
362 */
363 static enumerator_t* create_policy_enumerator(private_child_sa_t *this)
364 {
365 policy_enumerator_t *e = malloc_thing(policy_enumerator_t);
366
367 e->public.enumerate = (void*)policy_enumerate;
368 e->public.destroy = (void*)policy_destroy;
369 e->mine = this->my_ts->create_enumerator(this->my_ts);
370 e->other = this->other_ts->create_enumerator(this->other_ts);
371 e->list = this->other_ts;
372 e->ts = NULL;
373
374 return &e->public;
375 }
376
377 /**
378 * update the cached usebytes
379 * returns SUCCESS if the usebytes have changed, FAILED if not or no SPIs
380 * are available, and NOT_SUPPORTED if the kernel interface does not support
381 * quering the usebytes.
382 */
383 static bool update_usebytes(private_child_sa_t *this, bool inbound)
384 {
385 status_t status = FAILED;
386 u_int64_t bytes;
387
388 if (inbound)
389 {
390 if (this->my_spi)
391 {
392 status = charon->kernel_interface->query_sa(
393 charon->kernel_interface,
394 this->other_addr, this->my_addr,
395 this->my_spi, this->protocol, &bytes);
396 if (status == SUCCESS)
397 {
398 if (bytes > this->my_usebytes)
399 {
400 this->my_usebytes = bytes;
401 return SUCCESS;
402 }
403 return FAILED;
404 }
405 }
406 }
407 else
408 {
409 if (this->other_spi)
410 {
411 status = charon->kernel_interface->query_sa(
412 charon->kernel_interface,
413 this->my_addr, this->other_addr,
414 this->other_spi, this->protocol, &bytes);
415 if (status == SUCCESS)
416 {
417 if (bytes > this->other_usebytes)
418 {
419 this->other_usebytes = bytes;
420 return SUCCESS;
421 }
422 return FAILED;
423 }
424 }
425 }
426 return status;
427 }
428
429 /**
430 * Implementation of child_sa_t.get_usetime
431 */
432 static u_int32_t get_usetime(private_child_sa_t *this, bool inbound)
433 {
434 enumerator_t *enumerator;
435 traffic_selector_t *my_ts, *other_ts;
436 u_int32_t last_use = 0;
437
438 if (update_usebytes(this, inbound) == FAILED)
439 { /* no SPI or no traffic since last update */
440 return inbound ? this->my_usetime : this->other_usetime;
441 }
442
443 enumerator = create_policy_enumerator(this);
444 while (enumerator->enumerate(enumerator, &my_ts, &other_ts))
445 {
446 u_int32_t in, out, fwd;
447
448 if (inbound)
449 {
450 if (charon->kernel_interface->query_policy(charon->kernel_interface,
451 other_ts, my_ts, POLICY_IN, &in) == SUCCESS)
452 {
453 last_use = max(last_use, in);
454 }
455 if (this->mode != MODE_TRANSPORT)
456 {
457 if (charon->kernel_interface->query_policy(charon->kernel_interface,
458 other_ts, my_ts, POLICY_FWD, &fwd) == SUCCESS)
459 {
460 last_use = max(last_use, fwd);
461 }
462 }
463 }
464 else
465 {
466 if (charon->kernel_interface->query_policy(charon->kernel_interface,
467 my_ts, other_ts, POLICY_OUT, &out) == SUCCESS)
468 {
469 last_use = max(last_use, out);
470 }
471 }
472 }
473 enumerator->destroy(enumerator);
474 if (inbound)
475 {
476 this->my_usetime = last_use;
477 }
478 else
479 {
480 this->other_usetime = last_use;
481 }
482 return last_use;
483 }
484
485 /**
486 * Implementation of child_sa_t.get_usebytes
487 */
488 static u_int64_t get_usebytes(private_child_sa_t *this, bool inbound)
489 {
490 update_usebytes(this, inbound);
491 return inbound ? this->my_usebytes : this->other_usebytes;
492 }
493
494 /**
495 * Implementation of child_sa_t.get_lifetime
496 */
497 static u_int32_t get_lifetime(private_child_sa_t *this, bool hard)
498 {
499 return hard ? this->expire_time : this->rekey_time;
500 }
501
502 /**
503 * Implementation of child_sa_t.alloc_spi
504 */
505 static u_int32_t alloc_spi(private_child_sa_t *this, protocol_id_t protocol)
506 {
507 if (charon->kernel_interface->get_spi(charon->kernel_interface,
508 this->other_addr, this->my_addr, protocol,
509 this->reqid, &this->my_spi) == SUCCESS)
510 {
511 return this->my_spi;
512 }
513 return 0;
514 }
515
516 /**
517 * Implementation of child_sa_t.alloc_cpi
518 */
519 static u_int16_t alloc_cpi(private_child_sa_t *this)
520 {
521 if (charon->kernel_interface->get_cpi(charon->kernel_interface,
522 this->other_addr, this->my_addr, this->reqid,
523 &this->my_cpi) == SUCCESS)
524 {
525 return this->my_cpi;
526 }
527 return 0;
528 }
529
530 /**
531 * Implementation of child_sa_t.install
532 */
533 static status_t install(private_child_sa_t *this, chunk_t encr, chunk_t integ,
534 u_int32_t spi, u_int16_t cpi, bool inbound)
535 {
536 u_int16_t enc_alg = ENCR_UNDEFINED, int_alg = AUTH_UNDEFINED, size;
537 u_int32_t soft, hard, now;
538 host_t *src, *dst;
539 status_t status;
540 bool update = FALSE;
541
542 /* now we have to decide which spi to use. Use self allocated, if "in",
543 * or the one in the proposal, if not "in" (others). Additionally,
544 * source and dest host switch depending on the role */
545 if (inbound)
546 {
547 dst = this->my_addr;
548 src = this->other_addr;
549 if (this->my_spi == spi)
550 { /* alloc_spi has been called, do an SA update */
551 update = TRUE;
552 }
553 this->my_spi = spi;
554 this->my_cpi = cpi;
555 }
556 else
557 {
558 src = this->my_addr;
559 dst = this->other_addr;
560 this->other_spi = spi;
561 this->other_cpi = cpi;
562 }
563
564 DBG2(DBG_CHD, "adding %s %N SA", inbound ? "inbound" : "outbound",
565 protocol_id_names, this->protocol);
566
567 /* send SA down to the kernel */
568 DBG2(DBG_CHD, " SPI 0x%.8x, src %H dst %H", ntohl(spi), src, dst);
569
570 this->proposal->get_algorithm(this->proposal, ENCRYPTION_ALGORITHM,
571 &enc_alg, &size);
572 this->proposal->get_algorithm(this->proposal, INTEGRITY_ALGORITHM,
573 &int_alg, &size);
574
575 soft = this->config->get_lifetime(this->config, TRUE);
576 hard = this->config->get_lifetime(this->config, FALSE);
577
578 status = charon->kernel_interface->add_sa(charon->kernel_interface,
579 src, dst, spi, this->protocol, this->reqid,
580 inbound ? soft : 0, hard, enc_alg, encr, int_alg, integ,
581 this->mode, this->ipcomp, cpi, this->encap, update);
582
583 now = time(NULL);
584 if (soft)
585 {
586 this->rekey_time = now + soft;
587 }
588 if (hard)
589 {
590 this->expire_time = now + hard;
591 }
592 return status;
593 }
594
595 /**
596 * Implementation of child_sa_t.add_policies
597 */
598 static status_t add_policies(private_child_sa_t *this,
599 linked_list_t *my_ts_list, linked_list_t *other_ts_list)
600 {
601 enumerator_t *enumerator;
602 traffic_selector_t *my_ts, *other_ts;
603 status_t status = SUCCESS;
604 bool routed = (this->state == CHILD_CREATED);
605
606 /* apply traffic selectors */
607 enumerator = my_ts_list->create_enumerator(my_ts_list);
608 while (enumerator->enumerate(enumerator, &my_ts))
609 {
610 this->my_ts->insert_last(this->my_ts, my_ts->clone(my_ts));
611 }
612 enumerator->destroy(enumerator);
613 enumerator = other_ts_list->create_enumerator(other_ts_list);
614 while (enumerator->enumerate(enumerator, &other_ts))
615 {
616 this->other_ts->insert_last(this->other_ts, other_ts->clone(other_ts));
617 }
618 enumerator->destroy(enumerator);
619
620 if (this->config->install_policy(this->config))
621 {
622 /* enumerate pairs of traffic selectors */
623 enumerator = create_policy_enumerator(this);
624 while (enumerator->enumerate(enumerator, &my_ts, &other_ts))
625 {
626 /* install 3 policies: out, in and forward */
627 status |= charon->kernel_interface->add_policy(charon->kernel_interface,
628 this->my_addr, this->other_addr, my_ts, other_ts, POLICY_OUT,
629 this->other_spi, this->protocol, this->reqid, this->mode,
630 this->ipcomp, this->other_cpi, routed);
631
632 status |= charon->kernel_interface->add_policy(charon->kernel_interface,
633 this->other_addr, this->my_addr, other_ts, my_ts, POLICY_IN,
634 this->my_spi, this->protocol, this->reqid, this->mode,
635 this->ipcomp, this->my_cpi, routed);
636 if (this->mode != MODE_TRANSPORT)
637 {
638 status |= charon->kernel_interface->add_policy(charon->kernel_interface,
639 this->other_addr, this->my_addr, other_ts, my_ts, POLICY_FWD,
640 this->my_spi, this->protocol, this->reqid, this->mode,
641 this->ipcomp, this->my_cpi, routed);
642 }
643
644 if (status != SUCCESS)
645 {
646 break;
647 }
648 }
649 enumerator->destroy(enumerator);
650 }
651
652 if (status == SUCCESS && this->state == CHILD_CREATED)
653 { /* switch to routed state if no SAD entry set up */
654 set_state(this, CHILD_ROUTED);
655 }
656 return status;
657 }
658
659 /**
660 * Implementation of child_sa_t.update.
661 */
662 static status_t update(private_child_sa_t *this, host_t *me, host_t *other,
663 host_t *vip, bool encap)
664 {
665 child_sa_state_t old;
666 bool transport_proxy_mode;
667
668 /* anything changed at all? */
669 if (me->equals(me, this->my_addr) &&
670 other->equals(other, this->other_addr) && this->encap == encap)
671 {
672 return SUCCESS;
673 }
674
675 old = this->state;
676 set_state(this, CHILD_UPDATING);
677 transport_proxy_mode = this->config->use_proxy_mode(this->config) &&
678 this->mode == MODE_TRANSPORT;
679
680 if (!transport_proxy_mode)
681 {
682 /* update our (initator) SA */
683 if (this->my_spi)
684 {
685 if (charon->kernel_interface->update_sa(charon->kernel_interface,
686 this->my_spi, this->protocol,
687 this->ipcomp != IPCOMP_NONE ? this->my_cpi : 0,
688 this->other_addr, this->my_addr, other, me,
689 this->encap, encap) == NOT_SUPPORTED)
690 {
691 return NOT_SUPPORTED;
692 }
693 }
694
695 /* update his (responder) SA */
696 if (this->other_spi)
697 {
698 if (charon->kernel_interface->update_sa(charon->kernel_interface,
699 this->other_spi, this->protocol,
700 this->ipcomp != IPCOMP_NONE ? this->other_cpi : 0,
701 this->my_addr, this->other_addr, me, other,
702 this->encap, encap) == NOT_SUPPORTED)
703 {
704 return NOT_SUPPORTED;
705 }
706 }
707 }
708
709 if (this->config->install_policy(this->config))
710 {
711 /* update policies */
712 if (!me->ip_equals(me, this->my_addr) ||
713 !other->ip_equals(other, this->other_addr))
714 {
715 enumerator_t *enumerator;
716 traffic_selector_t *my_ts, *other_ts;
717
718 /* always use high priorities, as hosts getting updated are INSTALLED */
719 enumerator = create_policy_enumerator(this);
720 while (enumerator->enumerate(enumerator, &my_ts, &other_ts))
721 {
722 /* remove old policies first */
723 charon->kernel_interface->del_policy(charon->kernel_interface,
724 my_ts, other_ts, POLICY_OUT, FALSE);
725 charon->kernel_interface->del_policy(charon->kernel_interface,
726 other_ts, my_ts, POLICY_IN, FALSE);
727 if (this->mode != MODE_TRANSPORT)
728 {
729 charon->kernel_interface->del_policy(charon->kernel_interface,
730 other_ts, my_ts, POLICY_FWD, FALSE);
731 }
732
733 /* check whether we have to update a "dynamic" traffic selector */
734 if (!me->ip_equals(me, this->my_addr) &&
735 my_ts->is_host(my_ts, this->my_addr))
736 {
737 my_ts->set_address(my_ts, me);
738 }
739 if (!other->ip_equals(other, this->other_addr) &&
740 other_ts->is_host(other_ts, this->other_addr))
741 {
742 other_ts->set_address(other_ts, other);
743 }
744
745 /* we reinstall the virtual IP to handle interface roaming
746 * correctly */
747 if (vip)
748 {
749 charon->kernel_interface->del_ip(charon->kernel_interface, vip);
750 charon->kernel_interface->add_ip(charon->kernel_interface, vip, me);
751 }
752
753 /* reinstall updated policies */
754 charon->kernel_interface->add_policy(charon->kernel_interface,
755 me, other, my_ts, other_ts, POLICY_OUT, this->other_spi,
756 this->protocol, this->reqid, this->mode, this->ipcomp,
757 this->other_cpi, FALSE);
758 charon->kernel_interface->add_policy(charon->kernel_interface,
759 other, me, other_ts, my_ts, POLICY_IN, this->my_spi,
760 this->protocol, this->reqid, this->mode, this->ipcomp,
761 this->my_cpi, FALSE);
762 if (this->mode != MODE_TRANSPORT)
763 {
764 charon->kernel_interface->add_policy(charon->kernel_interface,
765 other, me, other_ts, my_ts, POLICY_FWD, this->my_spi,
766 this->protocol, this->reqid, this->mode, this->ipcomp,
767 this->my_cpi, FALSE);
768 }
769 }
770 enumerator->destroy(enumerator);
771 }
772 }
773
774 if (!transport_proxy_mode)
775 {
776 /* apply hosts */
777 if (!me->equals(me, this->my_addr))
778 {
779 this->my_addr->destroy(this->my_addr);
780 this->my_addr = me->clone(me);
781 }
782 if (!other->equals(other, this->other_addr))
783 {
784 this->other_addr->destroy(this->other_addr);
785 this->other_addr = other->clone(other);
786 }
787 }
788
789 this->encap = encap;
790 set_state(this, old);
791
792 return SUCCESS;
793 }
794
795 /**
796 * Implementation of child_sa_t.destroy.
797 */
798 static void destroy(private_child_sa_t *this)
799 {
800 enumerator_t *enumerator;
801 traffic_selector_t *my_ts, *other_ts;
802 bool unrouted = (this->state == CHILD_ROUTED);
803
804 set_state(this, CHILD_DESTROYING);
805
806 /* delete SAs in the kernel, if they are set up */
807 if (this->my_spi)
808 {
809 charon->kernel_interface->del_sa(charon->kernel_interface,
810 this->other_addr, this->my_addr, this->my_spi,
811 this->protocol, this->my_cpi);
812 }
813 if (this->other_spi)
814 {
815 charon->kernel_interface->del_sa(charon->kernel_interface,
816 this->my_addr, this->other_addr, this->other_spi,
817 this->protocol, this->other_cpi);
818 }
819
820 if (this->config->install_policy(this->config))
821 {
822 /* delete all policies in the kernel */
823 enumerator = create_policy_enumerator(this);
824 while (enumerator->enumerate(enumerator, &my_ts, &other_ts))
825 {
826 charon->kernel_interface->del_policy(charon->kernel_interface,
827 my_ts, other_ts, POLICY_OUT, unrouted);
828 charon->kernel_interface->del_policy(charon->kernel_interface,
829 other_ts, my_ts, POLICY_IN, unrouted);
830 if (this->mode != MODE_TRANSPORT)
831 {
832 charon->kernel_interface->del_policy(charon->kernel_interface,
833 other_ts, my_ts, POLICY_FWD, unrouted);
834 }
835 }
836 enumerator->destroy(enumerator);
837 }
838
839 this->my_ts->destroy_offset(this->my_ts, offsetof(traffic_selector_t, destroy));
840 this->other_ts->destroy_offset(this->other_ts, offsetof(traffic_selector_t, destroy));
841 this->my_addr->destroy(this->my_addr);
842 this->other_addr->destroy(this->other_addr);
843 DESTROY_IF(this->proposal);
844 this->config->destroy(this->config);
845 free(this);
846 }
847
848 /*
849 * Described in header.
850 */
851 child_sa_t * child_sa_create(host_t *me, host_t* other,
852 child_cfg_t *config, u_int32_t rekey, bool encap)
853 {
854 static u_int32_t reqid = 0;
855 private_child_sa_t *this = malloc_thing(private_child_sa_t);
856
857 /* public functions */
858 this->public.get_name = (char*(*)(child_sa_t*))get_name;
859 this->public.get_reqid = (u_int32_t(*)(child_sa_t*))get_reqid;
860 this->public.get_config = (child_cfg_t*(*)(child_sa_t*))get_config;
861 this->public.get_state = (child_sa_state_t(*)(child_sa_t*))get_state;
862 this->public.set_state = (void(*)(child_sa_t*,child_sa_state_t))set_state;
863 this->public.get_spi = (u_int32_t(*)(child_sa_t*, bool))get_spi;
864 this->public.get_cpi = (u_int16_t(*)(child_sa_t*, bool))get_cpi;
865 this->public.get_protocol = (protocol_id_t(*)(child_sa_t*))get_protocol;
866 this->public.set_protocol = (void(*)(child_sa_t*, protocol_id_t protocol))set_protocol;
867 this->public.get_mode = (ipsec_mode_t(*)(child_sa_t*))get_mode;
868 this->public.set_mode = (void(*)(child_sa_t*, ipsec_mode_t mode))set_mode;
869 this->public.get_proposal = (proposal_t*(*)(child_sa_t*))get_proposal;
870 this->public.set_proposal = (void(*)(child_sa_t*, proposal_t *proposal))set_proposal;
871 this->public.get_lifetime = (u_int32_t(*)(child_sa_t*, bool))get_lifetime;
872 this->public.get_usetime = (u_int32_t(*)(child_sa_t*, bool))get_usetime;
873 this->public.get_usebytes = (u_int64_t(*)(child_sa_t*, bool))get_usebytes;
874 this->public.has_encap = (bool(*)(child_sa_t*))has_encap;
875 this->public.get_ipcomp = (ipcomp_transform_t(*)(child_sa_t*))get_ipcomp;
876 this->public.set_ipcomp = (void(*)(child_sa_t*,ipcomp_transform_t))set_ipcomp;
877 this->public.alloc_spi = (u_int32_t(*)(child_sa_t*, protocol_id_t protocol))alloc_spi;
878 this->public.alloc_cpi = (u_int16_t(*)(child_sa_t*))alloc_cpi;
879 this->public.install = (status_t(*)(child_sa_t*, chunk_t encr, chunk_t integ, u_int32_t spi, u_int16_t cpi, bool inbound))install;
880 this->public.update = (status_t (*)(child_sa_t*,host_t*,host_t*,host_t*,bool))update;
881 this->public.add_policies = (status_t (*)(child_sa_t*, linked_list_t*,linked_list_t*))add_policies;
882 this->public.get_traffic_selectors = (linked_list_t*(*)(child_sa_t*,bool))get_traffic_selectors;
883 this->public.create_policy_enumerator = (enumerator_t*(*)(child_sa_t*))create_policy_enumerator;
884 this->public.destroy = (void(*)(child_sa_t*))destroy;
885
886 /* private data */
887 this->my_addr = me->clone(me);
888 this->other_addr = other->clone(other);
889 this->my_spi = 0;
890 this->other_spi = 0;
891 this->my_cpi = 0;
892 this->other_cpi = 0;
893 this->encap = encap;
894 this->ipcomp = IPCOMP_NONE;
895 this->state = CHILD_CREATED;
896 this->my_usetime = 0;
897 this->other_usetime = 0;
898 this->my_usebytes = 0;
899 this->other_usebytes = 0;
900 /* reuse old reqid if we are rekeying an existing CHILD_SA */
901 this->reqid = rekey ? rekey : ++reqid;
902 this->my_ts = linked_list_create();
903 this->other_ts = linked_list_create();
904 this->protocol = PROTO_NONE;
905 this->mode = MODE_TUNNEL;
906 this->proposal = NULL;
907 this->rekey_time = 0;
908 this->expire_time = 0;
909 this->config = config;
910 config->get_ref(config);
911
912 /* MIPv6 proxy transport mode sets SA endpoints to TS hosts */
913 if (config->get_mode(config) == MODE_TRANSPORT &&
914 config->use_proxy_mode(config))
915 {
916 ts_type_t type;
917 int family;
918 chunk_t addr;
919 host_t *host;
920 enumerator_t *enumerator;
921 linked_list_t *my_ts_list, *other_ts_list;
922 traffic_selector_t *my_ts, *other_ts;
923
924 this->mode = MODE_TRANSPORT;
925
926 my_ts_list = config->get_traffic_selectors(config, TRUE, NULL, me);
927 enumerator = my_ts_list->create_enumerator(my_ts_list);
928 if (enumerator->enumerate(enumerator, &my_ts))
929 {
930 if (my_ts->is_host(my_ts, NULL) &&
931 !my_ts->is_host(my_ts, this->my_addr))
932 {
933 type = my_ts->get_type(my_ts);
934 family = (type == TS_IPV4_ADDR_RANGE) ? AF_INET : AF_INET6;
935 addr = my_ts->get_from_address(my_ts);
936 host = host_create_from_chunk(family, addr, 0);
937 free(addr.ptr);
938 DBG1(DBG_CHD, "my address: %H is a transport mode proxy for %H",
939 this->my_addr, host);
940 this->my_addr->destroy(this->my_addr);
941 this->my_addr = host;
942 }
943 }
944 enumerator->destroy(enumerator);
945 my_ts_list->destroy_offset(my_ts_list, offsetof(traffic_selector_t, destroy));
946
947 other_ts_list = config->get_traffic_selectors(config, FALSE, NULL, other);
948 enumerator = other_ts_list->create_enumerator(other_ts_list);
949 if (enumerator->enumerate(enumerator, &other_ts))
950 {
951 if (other_ts->is_host(other_ts, NULL) &&
952 !other_ts->is_host(other_ts, this->other_addr))
953 {
954 type = other_ts->get_type(other_ts);
955 family = (type == TS_IPV4_ADDR_RANGE) ? AF_INET : AF_INET6;
956 addr = other_ts->get_from_address(other_ts);
957 host = host_create_from_chunk(family, addr, 0);
958 free(addr.ptr);
959 DBG1(DBG_CHD, "other address: %H is a transport mode proxy for %H",
960 this->other_addr, host);
961 this->other_addr->destroy(this->other_addr);
962 this->other_addr = host;
963 }
964 }
965 enumerator->destroy(enumerator);
966 other_ts_list->destroy_offset(other_ts_list, offsetof(traffic_selector_t, destroy));
967 }
968
969 return &this->public;
970 }