c05b44b85c5d04a20675b5a62558dc8dcb2ad10b
[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 /**
142 * Implementation of child_sa_t.get_name
143 */
144 static char *get_name(private_child_sa_t *this)
145 {
146 return this->config->get_name(this->config);
147 }
148
149 /**
150 * Implements child_sa_t.get_reqid
151 */
152 static u_int32_t get_reqid(private_child_sa_t *this)
153 {
154 return this->reqid;
155 }
156
157 /**
158 * Implements child_sa_t.get_config
159 */
160 static child_cfg_t* get_config(private_child_sa_t *this)
161 {
162 return this->config;
163 }
164
165 /**
166 * Implements child_sa_t.set_state
167 */
168 static void set_state(private_child_sa_t *this, child_sa_state_t state)
169 {
170 charon->bus->child_state_change(charon->bus, &this->public, state);
171 this->state = state;
172 }
173
174 /**
175 * Implements child_sa_t.get_state
176 */
177 static child_sa_state_t get_state(private_child_sa_t *this)
178 {
179 return this->state;
180 }
181
182 /**
183 * Implements child_sa_t.get_spi
184 */
185 u_int32_t get_spi(private_child_sa_t *this, bool inbound)
186 {
187 return inbound ? this->my_spi : this->other_spi;
188 }
189
190 /**
191 * Implements child_sa_t.get_cpi
192 */
193 u_int16_t get_cpi(private_child_sa_t *this, bool inbound)
194 {
195 return inbound ? this->my_cpi : this->other_cpi;
196 }
197
198 /**
199 * Implements child_sa_t.get_protocol
200 */
201 protocol_id_t get_protocol(private_child_sa_t *this)
202 {
203 return this->protocol;
204 }
205
206 /**
207 * Implementation of child_sa_t.set_protocol
208 */
209 static void set_protocol(private_child_sa_t *this, protocol_id_t protocol)
210 {
211 this->protocol = protocol;
212 }
213
214 /**
215 * Implementation of child_sa_t.get_mode
216 */
217 static ipsec_mode_t get_mode(private_child_sa_t *this)
218 {
219 return this->mode;
220 }
221
222 /**
223 * Implementation of child_sa_t.set_mode
224 */
225 static void set_mode(private_child_sa_t *this, ipsec_mode_t mode)
226 {
227 this->mode = mode;
228 }
229
230 /**
231 * Implementation of child_sa_t.has_encap
232 */
233 static bool has_encap(private_child_sa_t *this)
234 {
235 return this->encap;
236 }
237
238 /**
239 * Implementation of child_sa_t.get_ipcomp
240 */
241 static ipcomp_transform_t get_ipcomp(private_child_sa_t *this)
242 {
243 return this->ipcomp;
244 }
245
246 /**
247 * Implementation of child_sa_t.set_ipcomp.
248 */
249 static void set_ipcomp(private_child_sa_t *this, ipcomp_transform_t ipcomp)
250 {
251 this->ipcomp = ipcomp;
252 }
253
254 /**
255 * Implementation of child_sa_t.get_proposal
256 */
257 static proposal_t* get_proposal(private_child_sa_t *this)
258 {
259 return this->proposal;
260 }
261
262 /**
263 * Implementation of child_sa_t.set_proposal
264 */
265 static void set_proposal(private_child_sa_t *this, proposal_t *proposal)
266 {
267 this->proposal = proposal->clone(proposal);
268 }
269
270 /**
271 * Implementation of child_sa_t.get_traffic_selectors.
272 */
273 static linked_list_t *get_traffic_selectors(private_child_sa_t *this, bool local)
274 {
275 return local ? this->my_ts : this->other_ts;
276 }
277
278 typedef struct policy_enumerator_t policy_enumerator_t;
279
280 /**
281 * Private policy enumerator
282 */
283 struct policy_enumerator_t {
284 /** implements enumerator_t */
285 enumerator_t public;
286 /** enumerator over own TS */
287 enumerator_t *mine;
288 /** enumerator over others TS */
289 enumerator_t *other;
290 /** list of others TS, to recreate enumerator */
291 linked_list_t *list;
292 /** currently enumerating TS for "me" side */
293 traffic_selector_t *ts;
294 };
295
296 /**
297 * enumerator function of create_policy_enumerator()
298 */
299 static bool policy_enumerate(policy_enumerator_t *this,
300 traffic_selector_t **my_out, traffic_selector_t **other_out)
301 {
302 traffic_selector_t *other_ts;
303
304 while (this->ts || this->mine->enumerate(this->mine, &this->ts))
305 {
306 if (!this->other->enumerate(this->other, &other_ts))
307 { /* end of others list, restart with new of mine */
308 this->other->destroy(this->other);
309 this->other = this->list->create_enumerator(this->list);
310 this->ts = NULL;
311 continue;
312 }
313 if (this->ts->get_type(this->ts) != other_ts->get_type(other_ts))
314 { /* family mismatch */
315 continue;
316 }
317 if (this->ts->get_protocol(this->ts) &&
318 other_ts->get_protocol(other_ts) &&
319 this->ts->get_protocol(this->ts) != other_ts->get_protocol(other_ts))
320 { /* protocol mismatch */
321 continue;
322 }
323 *my_out = this->ts;
324 *other_out = other_ts;
325 return TRUE;
326 }
327 return FALSE;
328 }
329
330 /**
331 * destroy function of create_policy_enumerator()
332 */
333 static void policy_destroy(policy_enumerator_t *this)
334 {
335 this->mine->destroy(this->mine);
336 this->other->destroy(this->other);
337 free(this);
338 }
339
340 /**
341 * Implementation of child_sa_t.create_policy_enumerator
342 */
343 static enumerator_t* create_policy_enumerator(private_child_sa_t *this)
344 {
345 policy_enumerator_t *e = malloc_thing(policy_enumerator_t);
346
347 e->public.enumerate = (void*)policy_enumerate;
348 e->public.destroy = (void*)policy_destroy;
349 e->mine = this->my_ts->create_enumerator(this->my_ts);
350 e->other = this->other_ts->create_enumerator(this->other_ts);
351 e->list = this->other_ts;
352 e->ts = NULL;
353
354 return &e->public;
355 }
356
357 /**
358 * Implementation of child_sa_t.get_usetime
359 */
360 static u_int32_t get_usetime(private_child_sa_t *this, bool inbound)
361 {
362 enumerator_t *enumerator;
363 traffic_selector_t *my_ts, *other_ts;
364 u_int32_t last_use = 0;
365
366 enumerator = create_policy_enumerator(this);
367 while (enumerator->enumerate(enumerator, &my_ts, &other_ts))
368 {
369 u_int32_t in, out, fwd;
370
371 if (inbound)
372 {
373 if (charon->kernel_interface->query_policy(charon->kernel_interface,
374 other_ts, my_ts, POLICY_IN, &in) == SUCCESS)
375 {
376 last_use = max(last_use, in);
377 }
378 if (this->mode != MODE_TRANSPORT)
379 {
380 if (charon->kernel_interface->query_policy(charon->kernel_interface,
381 other_ts, my_ts, POLICY_FWD, &fwd) == SUCCESS)
382 {
383 last_use = max(last_use, fwd);
384 }
385 }
386 }
387 else
388 {
389 if (charon->kernel_interface->query_policy(charon->kernel_interface,
390 my_ts, other_ts, POLICY_OUT, &out) == SUCCESS)
391 {
392 last_use = max(last_use, out);
393 }
394 }
395 }
396 enumerator->destroy(enumerator);
397 return last_use;
398 }
399
400 /**
401 * Implementation of child_sa_t.get_lifetime
402 */
403 static u_int32_t get_lifetime(private_child_sa_t *this, bool hard)
404 {
405 return hard ? this->expire_time : this->rekey_time;
406 }
407
408 /**
409 * Implementation of child_sa_t.alloc_spi
410 */
411 static u_int32_t alloc_spi(private_child_sa_t *this, protocol_id_t protocol)
412 {
413 switch (protocol)
414 {
415 case PROTO_AH:
416 if (charon->kernel_interface->get_spi(charon->kernel_interface,
417 this->other_addr, this->my_addr, PROTO_AH,
418 this->reqid, &this->my_spi) == SUCCESS)
419 {
420 return this->my_spi;
421 }
422 break;
423 case PROTO_ESP:
424 if (charon->kernel_interface->get_spi(charon->kernel_interface,
425 this->other_addr, this->my_addr, PROTO_ESP,
426 this->reqid, &this->my_spi) == SUCCESS)
427 {
428 return this->my_spi;
429 }
430 break;
431 default:
432 break;
433 }
434 return 0;
435 }
436
437 /**
438 * Implementation of child_sa_t.alloc_cpi
439 */
440 static u_int16_t alloc_cpi(private_child_sa_t *this)
441 {
442 if (charon->kernel_interface->get_cpi(charon->kernel_interface,
443 this->other_addr, this->my_addr, this->reqid,
444 &this->my_cpi) == SUCCESS)
445 {
446 return this->my_cpi;
447 }
448 return 0;
449 }
450
451 /**
452 * Implementation of child_sa_t.install
453 */
454 static status_t install(private_child_sa_t *this, chunk_t encr, chunk_t integ,
455 u_int32_t spi, u_int16_t cpi, bool inbound)
456 {
457 u_int16_t enc_alg = ENCR_UNDEFINED, int_alg = AUTH_UNDEFINED, size;
458 u_int32_t soft, hard, now;
459 host_t *src, *dst;
460 status_t status;
461 bool update = FALSE;
462
463 /* now we have to decide which spi to use. Use self allocated, if "in",
464 * or the one in the proposal, if not "in" (others). Additionally,
465 * source and dest host switch depending on the role */
466 if (inbound)
467 {
468 dst = this->my_addr;
469 src = this->other_addr;
470 if (this->my_spi == spi)
471 { /* alloc_spi has been called, do an SA update */
472 update = TRUE;
473 }
474 this->my_spi = spi;
475 this->my_cpi = cpi;
476 }
477 else
478 {
479 src = this->my_addr;
480 dst = this->other_addr;
481 this->other_spi = spi;
482 this->other_cpi = cpi;
483 }
484
485 DBG2(DBG_CHD, "adding %s %N SA", inbound ? "inbound" : "outbound",
486 protocol_id_names, this->protocol);
487
488 /* send SA down to the kernel */
489 DBG2(DBG_CHD, " SPI 0x%.8x, src %H dst %H", ntohl(spi), src, dst);
490
491 this->proposal->get_algorithm(this->proposal, ENCRYPTION_ALGORITHM,
492 &enc_alg, &size);
493 this->proposal->get_algorithm(this->proposal, INTEGRITY_ALGORITHM,
494 &int_alg, &size);
495
496 soft = this->config->get_lifetime(this->config, TRUE);
497 hard = this->config->get_lifetime(this->config, FALSE);
498
499 status = charon->kernel_interface->add_sa(charon->kernel_interface,
500 src, dst, spi, this->protocol, this->reqid,
501 inbound ? soft : 0, hard, enc_alg, encr, int_alg, integ,
502 this->mode, this->ipcomp, cpi, this->encap, update);
503
504 now = time(NULL);
505 if (soft)
506 {
507 this->rekey_time = now + soft;
508 }
509 if (hard)
510 {
511 this->expire_time = now + hard;
512 }
513 return status;
514 }
515
516 /**
517 * Implementation of child_sa_t.add_policies
518 */
519 static status_t add_policies(private_child_sa_t *this,
520 linked_list_t *my_ts_list, linked_list_t *other_ts_list)
521 {
522 enumerator_t *enumerator;
523 traffic_selector_t *my_ts, *other_ts;
524 status_t status = SUCCESS;
525 bool routed = (this->state == CHILD_CREATED);
526
527 /* apply traffic selectors */
528 enumerator = my_ts_list->create_enumerator(my_ts_list);
529 while (enumerator->enumerate(enumerator, &my_ts))
530 {
531 this->my_ts->insert_last(this->my_ts, my_ts->clone(my_ts));
532 }
533 enumerator->destroy(enumerator);
534 enumerator = other_ts_list->create_enumerator(other_ts_list);
535 while (enumerator->enumerate(enumerator, &other_ts))
536 {
537 this->other_ts->insert_last(this->other_ts, other_ts->clone(other_ts));
538 }
539 enumerator->destroy(enumerator);
540
541 if (this->config->install_policy(this->config))
542 {
543 /* enumerate pairs of traffic selectors */
544 enumerator = create_policy_enumerator(this);
545 while (enumerator->enumerate(enumerator, &my_ts, &other_ts))
546 {
547 /* install 3 policies: out, in and forward */
548 status |= charon->kernel_interface->add_policy(charon->kernel_interface,
549 this->my_addr, this->other_addr, my_ts, other_ts, POLICY_OUT,
550 this->other_spi, this->protocol, this->reqid, this->mode,
551 this->ipcomp, this->other_cpi, routed);
552
553 status |= charon->kernel_interface->add_policy(charon->kernel_interface,
554 this->other_addr, this->my_addr, other_ts, my_ts, POLICY_IN,
555 this->my_spi, this->protocol, this->reqid, this->mode,
556 this->ipcomp, this->my_cpi, routed);
557 if (this->mode != MODE_TRANSPORT)
558 {
559 status |= charon->kernel_interface->add_policy(charon->kernel_interface,
560 this->other_addr, this->my_addr, other_ts, my_ts, POLICY_FWD,
561 this->my_spi, this->protocol, this->reqid, this->mode,
562 this->ipcomp, this->my_cpi, routed);
563 }
564
565 if (status != SUCCESS)
566 {
567 break;
568 }
569 }
570 enumerator->destroy(enumerator);
571 }
572
573 if (status == SUCCESS && this->state == CHILD_CREATED)
574 { /* switch to routed state if no SAD entry set up */
575 set_state(this, CHILD_ROUTED);
576 }
577 return status;
578 }
579
580 /**
581 * Implementation of child_sa_t.update.
582 */
583 static status_t update(private_child_sa_t *this, host_t *me, host_t *other,
584 host_t *vip, bool encap)
585 {
586 child_sa_state_t old;
587 bool transport_proxy_mode;
588
589 /* anything changed at all? */
590 if (me->equals(me, this->my_addr) &&
591 other->equals(other, this->other_addr) && this->encap == encap)
592 {
593 return SUCCESS;
594 }
595
596 old = this->state;
597 set_state(this, CHILD_UPDATING);
598 transport_proxy_mode = this->config->use_proxy_mode(this->config) &&
599 this->mode == MODE_TRANSPORT;
600
601 if (!transport_proxy_mode)
602 {
603 /* update our (initator) SA */
604 if (this->my_spi)
605 {
606 if (charon->kernel_interface->update_sa(charon->kernel_interface,
607 this->my_spi, this->protocol,
608 this->ipcomp != IPCOMP_NONE ? this->my_cpi : 0,
609 this->other_addr, this->my_addr, other, me,
610 this->encap, encap) == NOT_SUPPORTED)
611 {
612 return NOT_SUPPORTED;
613 }
614 }
615
616 /* update his (responder) SA */
617 if (this->other_spi)
618 {
619 if (charon->kernel_interface->update_sa(charon->kernel_interface,
620 this->other_spi, this->protocol,
621 this->ipcomp != IPCOMP_NONE ? this->other_cpi : 0,
622 this->my_addr, this->other_addr, me, other,
623 this->encap, encap) == NOT_SUPPORTED)
624 {
625 return NOT_SUPPORTED;
626 }
627 }
628 }
629
630 if (this->config->install_policy(this->config))
631 {
632 /* update policies */
633 if (!me->ip_equals(me, this->my_addr) ||
634 !other->ip_equals(other, this->other_addr))
635 {
636 enumerator_t *enumerator;
637 traffic_selector_t *my_ts, *other_ts;
638
639 /* always use high priorities, as hosts getting updated are INSTALLED */
640 enumerator = create_policy_enumerator(this);
641 while (enumerator->enumerate(enumerator, &my_ts, &other_ts))
642 {
643 /* remove old policies first */
644 charon->kernel_interface->del_policy(charon->kernel_interface,
645 my_ts, other_ts, POLICY_OUT, FALSE);
646 charon->kernel_interface->del_policy(charon->kernel_interface,
647 other_ts, my_ts, POLICY_IN, FALSE);
648 if (this->mode != MODE_TRANSPORT)
649 {
650 charon->kernel_interface->del_policy(charon->kernel_interface,
651 other_ts, my_ts, POLICY_FWD, FALSE);
652 }
653
654 /* check whether we have to update a "dynamic" traffic selector */
655 if (!me->ip_equals(me, this->my_addr) &&
656 my_ts->is_host(my_ts, this->my_addr))
657 {
658 my_ts->set_address(my_ts, me);
659 }
660 if (!other->ip_equals(other, this->other_addr) &&
661 other_ts->is_host(other_ts, this->other_addr))
662 {
663 other_ts->set_address(other_ts, other);
664 }
665
666 /* we reinstall the virtual IP to handle interface roaming
667 * correctly */
668 if (vip)
669 {
670 charon->kernel_interface->del_ip(charon->kernel_interface, vip);
671 charon->kernel_interface->add_ip(charon->kernel_interface, vip, me);
672 }
673
674 /* reinstall updated policies */
675 charon->kernel_interface->add_policy(charon->kernel_interface,
676 me, other, my_ts, other_ts, POLICY_OUT, this->other_spi,
677 this->protocol, this->reqid, this->mode, this->ipcomp,
678 this->other_cpi, FALSE);
679 charon->kernel_interface->add_policy(charon->kernel_interface,
680 other, me, other_ts, my_ts, POLICY_IN, this->my_spi,
681 this->protocol, this->reqid, this->mode, this->ipcomp,
682 this->my_cpi, FALSE);
683 if (this->mode != MODE_TRANSPORT)
684 {
685 charon->kernel_interface->add_policy(charon->kernel_interface,
686 other, me, other_ts, my_ts, POLICY_FWD, this->my_spi,
687 this->protocol, this->reqid, this->mode, this->ipcomp,
688 this->my_cpi, FALSE);
689 }
690 }
691 enumerator->destroy(enumerator);
692 }
693 }
694
695 if (!transport_proxy_mode)
696 {
697 /* apply hosts */
698 if (!me->equals(me, this->my_addr))
699 {
700 this->my_addr->destroy(this->my_addr);
701 this->my_addr = me->clone(me);
702 }
703 if (!other->equals(other, this->other_addr))
704 {
705 this->other_addr->destroy(this->other_addr);
706 this->other_addr = other->clone(other);
707 }
708 }
709
710 this->encap = encap;
711 set_state(this, old);
712
713 return SUCCESS;
714 }
715
716 /**
717 * Implementation of child_sa_t.destroy.
718 */
719 static void destroy(private_child_sa_t *this)
720 {
721 enumerator_t *enumerator;
722 traffic_selector_t *my_ts, *other_ts;
723 bool unrouted = (this->state == CHILD_ROUTED);
724
725 set_state(this, CHILD_DESTROYING);
726
727 /* delete SAs in the kernel, if they are set up */
728 if (this->my_spi)
729 {
730 charon->kernel_interface->del_sa(charon->kernel_interface,
731 this->other_addr, this->my_addr, this->my_spi,
732 this->protocol, this->my_cpi);
733 }
734 if (this->other_spi)
735 {
736 charon->kernel_interface->del_sa(charon->kernel_interface,
737 this->my_addr, this->other_addr, this->other_spi,
738 this->protocol, this->other_cpi);
739 }
740
741 if (this->config->install_policy(this->config))
742 {
743 /* delete all policies in the kernel */
744 enumerator = create_policy_enumerator(this);
745 while (enumerator->enumerate(enumerator, &my_ts, &other_ts))
746 {
747 charon->kernel_interface->del_policy(charon->kernel_interface,
748 my_ts, other_ts, POLICY_OUT, unrouted);
749 charon->kernel_interface->del_policy(charon->kernel_interface,
750 other_ts, my_ts, POLICY_IN, unrouted);
751 if (this->mode != MODE_TRANSPORT)
752 {
753 charon->kernel_interface->del_policy(charon->kernel_interface,
754 other_ts, my_ts, POLICY_FWD, unrouted);
755 }
756 }
757 enumerator->destroy(enumerator);
758 }
759
760 this->my_ts->destroy_offset(this->my_ts, offsetof(traffic_selector_t, destroy));
761 this->other_ts->destroy_offset(this->other_ts, offsetof(traffic_selector_t, destroy));
762 this->my_addr->destroy(this->my_addr);
763 this->other_addr->destroy(this->other_addr);
764 DESTROY_IF(this->proposal);
765 this->config->destroy(this->config);
766 free(this);
767 }
768
769 /*
770 * Described in header.
771 */
772 child_sa_t * child_sa_create(host_t *me, host_t* other,
773 child_cfg_t *config, u_int32_t rekey, bool encap)
774 {
775 static u_int32_t reqid = 0;
776 private_child_sa_t *this = malloc_thing(private_child_sa_t);
777
778 /* public functions */
779 this->public.get_name = (char*(*)(child_sa_t*))get_name;
780 this->public.get_reqid = (u_int32_t(*)(child_sa_t*))get_reqid;
781 this->public.get_config = (child_cfg_t*(*)(child_sa_t*))get_config;
782 this->public.get_state = (child_sa_state_t(*)(child_sa_t*))get_state;
783 this->public.set_state = (void(*)(child_sa_t*,child_sa_state_t))set_state;
784 this->public.get_spi = (u_int32_t(*)(child_sa_t*, bool))get_spi;
785 this->public.get_cpi = (u_int16_t(*)(child_sa_t*, bool))get_cpi;
786 this->public.get_protocol = (protocol_id_t(*)(child_sa_t*))get_protocol;
787 this->public.set_protocol = (void(*)(child_sa_t*, protocol_id_t protocol))set_protocol;
788 this->public.get_mode = (ipsec_mode_t(*)(child_sa_t*))get_mode;
789 this->public.set_mode = (void(*)(child_sa_t*, ipsec_mode_t mode))set_mode;
790 this->public.get_proposal = (proposal_t*(*)(child_sa_t*))get_proposal;
791 this->public.set_proposal = (void(*)(child_sa_t*, proposal_t *proposal))set_proposal;
792 this->public.get_lifetime = (u_int32_t(*)(child_sa_t*, bool))get_lifetime;
793 this->public.get_usetime = (u_int32_t(*)(child_sa_t*, bool))get_usetime;
794 this->public.has_encap = (bool(*)(child_sa_t*))has_encap;
795 this->public.get_ipcomp = (ipcomp_transform_t(*)(child_sa_t*))get_ipcomp;
796 this->public.set_ipcomp = (void(*)(child_sa_t*,ipcomp_transform_t))set_ipcomp;
797 this->public.alloc_spi = (u_int32_t(*)(child_sa_t*, protocol_id_t protocol))alloc_spi;
798 this->public.alloc_cpi = (u_int16_t(*)(child_sa_t*))alloc_cpi;
799 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;
800 this->public.update = (status_t (*)(child_sa_t*,host_t*,host_t*,host_t*,bool))update;
801 this->public.add_policies = (status_t (*)(child_sa_t*, linked_list_t*,linked_list_t*))add_policies;
802 this->public.get_traffic_selectors = (linked_list_t*(*)(child_sa_t*,bool))get_traffic_selectors;
803 this->public.create_policy_enumerator = (enumerator_t*(*)(child_sa_t*))create_policy_enumerator;
804 this->public.destroy = (void(*)(child_sa_t*))destroy;
805
806 /* private data */
807 this->my_addr = me->clone(me);
808 this->other_addr = other->clone(other);
809 this->my_spi = 0;
810 this->other_spi = 0;
811 this->my_cpi = 0;
812 this->other_cpi = 0;
813 this->encap = encap;
814 this->ipcomp = IPCOMP_NONE;
815 this->state = CHILD_CREATED;
816 /* reuse old reqid if we are rekeying an existing CHILD_SA */
817 this->reqid = rekey ? rekey : ++reqid;
818 this->my_ts = linked_list_create();
819 this->other_ts = linked_list_create();
820 this->protocol = PROTO_NONE;
821 this->mode = MODE_TUNNEL;
822 this->proposal = NULL;
823 this->rekey_time = 0;
824 this->expire_time = 0;
825 this->config = config;
826 config->get_ref(config);
827
828 /* MIPv6 proxy transport mode sets SA endpoints to TS hosts */
829 if (config->get_mode(config) == MODE_TRANSPORT &&
830 config->use_proxy_mode(config))
831 {
832 ts_type_t type;
833 int family;
834 chunk_t addr;
835 host_t *host;
836 enumerator_t *enumerator;
837 linked_list_t *my_ts_list, *other_ts_list;
838 traffic_selector_t *my_ts, *other_ts;
839
840 this->mode = MODE_TRANSPORT;
841
842 my_ts_list = config->get_traffic_selectors(config, TRUE, NULL, me);
843 enumerator = my_ts_list->create_enumerator(my_ts_list);
844 if (enumerator->enumerate(enumerator, &my_ts))
845 {
846 if (my_ts->is_host(my_ts, NULL) &&
847 !my_ts->is_host(my_ts, this->my_addr))
848 {
849 type = my_ts->get_type(my_ts);
850 family = (type == TS_IPV4_ADDR_RANGE) ? AF_INET : AF_INET6;
851 addr = my_ts->get_from_address(my_ts);
852 host = host_create_from_chunk(family, addr, 0);
853 free(addr.ptr);
854 DBG1(DBG_CHD, "my address: %H is a transport mode proxy for %H",
855 this->my_addr, host);
856 this->my_addr->destroy(this->my_addr);
857 this->my_addr = host;
858 }
859 }
860 enumerator->destroy(enumerator);
861 my_ts_list->destroy_offset(my_ts_list, offsetof(traffic_selector_t, destroy));
862
863 other_ts_list = config->get_traffic_selectors(config, FALSE, NULL, other);
864 enumerator = other_ts_list->create_enumerator(other_ts_list);
865 if (enumerator->enumerate(enumerator, &other_ts))
866 {
867 if (other_ts->is_host(other_ts, NULL) &&
868 !other_ts->is_host(other_ts, this->other_addr))
869 {
870 type = other_ts->get_type(other_ts);
871 family = (type == TS_IPV4_ADDR_RANGE) ? AF_INET : AF_INET6;
872 addr = other_ts->get_from_address(other_ts);
873 host = host_create_from_chunk(family, addr, 0);
874 free(addr.ptr);
875 DBG1(DBG_CHD, "other address: %H is a transport mode proxy for %H",
876 this->other_addr, host);
877 this->other_addr->destroy(this->other_addr);
878 this->other_addr = host;
879 }
880 }
881 enumerator->destroy(enumerator);
882 other_ts_list->destroy_offset(other_ts_list, offsetof(traffic_selector_t, destroy));
883 }
884
885 return &this->public;
886 }