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4a09d9ee | 1 | /* |
68c6863b TB |
2 | * Copyright (C) 2007-2011 Tobias Brunner |
3 | * Copyright (C) 2007-2011 Martin Willi | |
4a09d9ee MW |
4 | * Hochschule fuer Technik Rapperswil |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms of the GNU General Public License as published by the | |
8 | * Free Software Foundation; either version 2 of the License, or (at your | |
9 | * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, but | |
12 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
13 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | * for more details. | |
15 | */ | |
16 | ||
17 | #include "task_manager_v1.h" | |
18 | ||
da063ec9 MW |
19 | #include <math.h> |
20 | ||
4a09d9ee | 21 | #include <daemon.h> |
c73c832c | 22 | #include <sa/tasks/main_mode.h> |
744c0801 | 23 | #include <sa/tasks/quick_mode.h> |
b03c700d | 24 | #include <sa/tasks/xauth_request.h> |
1cc4ec46 | 25 | #include <sa/tasks/ike_natd_v1.h> |
a2f8fc97 | 26 | #include <sa/tasks/ike_vendor_v1.h> |
0bcdb8e5 | 27 | #include <sa/tasks/ike_cert_pre_v1.h> |
8ad5cd1f | 28 | #include <sa/tasks/ike_cert_post.h> |
da063ec9 | 29 | #include <processing/jobs/retransmit_job.h> |
68c6863b | 30 | #include <processing/jobs/delete_ike_sa_job.h> |
4a09d9ee MW |
31 | |
32 | typedef struct exchange_t exchange_t; | |
33 | ||
34 | /** | |
35 | * An exchange in the air, used do detect and handle retransmission | |
36 | */ | |
37 | struct exchange_t { | |
38 | ||
39 | /** | |
40 | * Message ID used for this transaction | |
41 | */ | |
42 | u_int32_t mid; | |
43 | ||
44 | /** | |
45 | * generated packet for retransmission | |
46 | */ | |
47 | packet_t *packet; | |
48 | }; | |
49 | ||
50 | typedef struct private_task_manager_t private_task_manager_t; | |
51 | ||
52 | /** | |
53 | * private data of the task manager | |
54 | */ | |
55 | struct private_task_manager_t { | |
56 | ||
57 | /** | |
58 | * public functions | |
59 | */ | |
60 | task_manager_v1_t public; | |
61 | ||
62 | /** | |
63 | * associated IKE_SA we are serving | |
64 | */ | |
65 | ike_sa_t *ike_sa; | |
66 | ||
73aaf76b MW |
67 | /** |
68 | * RNG to create message IDs | |
69 | */ | |
70 | rng_t *rng; | |
71 | ||
4a09d9ee MW |
72 | /** |
73 | * Exchange we are currently handling as responder | |
74 | */ | |
75 | struct { | |
76 | /** | |
77 | * Message ID of the exchange | |
78 | */ | |
79 | u_int32_t mid; | |
80 | ||
9cc8bd4f MW |
81 | /** |
82 | * Hash of a previously received message | |
83 | */ | |
84 | u_int32_t hash; | |
85 | ||
4a09d9ee MW |
86 | /** |
87 | * packet for retransmission | |
88 | */ | |
89 | packet_t *packet; | |
90 | ||
91 | } responding; | |
92 | ||
93 | /** | |
94 | * Exchange we are currently handling as initiator | |
95 | */ | |
96 | struct { | |
97 | /** | |
98 | * Message ID of the exchange | |
99 | */ | |
100 | u_int32_t mid; | |
101 | ||
9cc8bd4f MW |
102 | /** |
103 | * Hash of a previously received message | |
104 | */ | |
105 | u_int32_t hash; | |
106 | ||
4a09d9ee MW |
107 | /** |
108 | * how many times we have retransmitted so far | |
109 | */ | |
110 | u_int retransmitted; | |
111 | ||
112 | /** | |
113 | * packet for retransmission | |
114 | */ | |
115 | packet_t *packet; | |
116 | ||
117 | /** | |
118 | * type of the initated exchange | |
119 | */ | |
120 | exchange_type_t type; | |
121 | ||
122 | } initiating; | |
123 | ||
124 | /** | |
125 | * List of queued tasks not yet in action | |
126 | */ | |
127 | linked_list_t *queued_tasks; | |
128 | ||
129 | /** | |
130 | * List of active tasks, initiated by ourselve | |
131 | */ | |
132 | linked_list_t *active_tasks; | |
133 | ||
134 | /** | |
135 | * List of tasks initiated by peer | |
136 | */ | |
137 | linked_list_t *passive_tasks; | |
138 | ||
4a09d9ee MW |
139 | /** |
140 | * Number of times we retransmit messages before giving up | |
141 | */ | |
142 | u_int retransmit_tries; | |
143 | ||
144 | /** | |
145 | * Retransmission timeout | |
146 | */ | |
147 | double retransmit_timeout; | |
148 | ||
149 | /** | |
150 | * Base to calculate retransmission timeout | |
151 | */ | |
152 | double retransmit_base; | |
153 | }; | |
154 | ||
155 | /** | |
156 | * flush all tasks in the task manager | |
157 | */ | |
158 | static void flush(private_task_manager_t *this) | |
159 | { | |
160 | this->queued_tasks->destroy_offset(this->queued_tasks, | |
161 | offsetof(task_t, destroy)); | |
162 | this->queued_tasks = linked_list_create(); | |
163 | this->passive_tasks->destroy_offset(this->passive_tasks, | |
164 | offsetof(task_t, destroy)); | |
165 | this->passive_tasks = linked_list_create(); | |
166 | this->active_tasks->destroy_offset(this->active_tasks, | |
167 | offsetof(task_t, destroy)); | |
168 | this->active_tasks = linked_list_create(); | |
169 | } | |
170 | ||
26b55dc6 MW |
171 | /** |
172 | * move a task of a specific type from the queue to the active list | |
173 | */ | |
174 | static bool activate_task(private_task_manager_t *this, task_type_t type) | |
175 | { | |
176 | enumerator_t *enumerator; | |
177 | task_t *task; | |
178 | bool found = FALSE; | |
179 | ||
180 | enumerator = this->queued_tasks->create_enumerator(this->queued_tasks); | |
181 | while (enumerator->enumerate(enumerator, (void**)&task)) | |
182 | { | |
183 | if (task->get_type(task) == type) | |
184 | { | |
185 | DBG2(DBG_IKE, " activating %N task", task_type_names, type); | |
186 | this->queued_tasks->remove_at(this->queued_tasks, enumerator); | |
187 | this->active_tasks->insert_last(this->active_tasks, task); | |
188 | found = TRUE; | |
189 | break; | |
190 | } | |
191 | } | |
192 | enumerator->destroy(enumerator); | |
193 | return found; | |
194 | } | |
195 | ||
23f4e4b4 CO |
196 | METHOD(task_manager_t, retransmit, status_t, |
197 | private_task_manager_t *this, u_int32_t message_id) | |
198 | { | |
199 | if (message_id == this->initiating.mid) | |
200 | { | |
201 | u_int32_t timeout; | |
23f4e4b4 | 202 | packet_t *packet; |
da063ec9 | 203 | job_t *job; |
23f4e4b4 CO |
204 | |
205 | if (this->initiating.retransmitted <= this->retransmit_tries) | |
206 | { | |
207 | timeout = (u_int32_t)(this->retransmit_timeout * 1000.0 * | |
208 | pow(this->retransmit_base, this->initiating.retransmitted)); | |
209 | } | |
210 | else | |
211 | { | |
212 | DBG1(DBG_IKE, "giving up after %d retransmits", | |
213 | this->initiating.retransmitted - 1); | |
214 | if (this->ike_sa->get_state(this->ike_sa) != IKE_CONNECTING) | |
215 | { | |
216 | charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE); | |
217 | } | |
218 | return DESTROY_ME; | |
219 | } | |
220 | ||
221 | if (this->initiating.retransmitted) | |
222 | { | |
223 | DBG1(DBG_IKE, "retransmit %d of request with message ID %d", | |
224 | this->initiating.retransmitted, message_id); | |
225 | } | |
226 | packet = this->initiating.packet->clone(this->initiating.packet); | |
227 | charon->sender->send(charon->sender, packet); | |
228 | ||
229 | this->initiating.retransmitted++; | |
230 | job = (job_t*)retransmit_job_create(this->initiating.mid, | |
231 | this->ike_sa->get_id(this->ike_sa)); | |
232 | lib->scheduler->schedule_job_ms(lib->scheduler, job, timeout); | |
233 | } | |
234 | return SUCCESS; | |
235 | } | |
236 | ||
4a09d9ee MW |
237 | METHOD(task_manager_t, initiate, status_t, |
238 | private_task_manager_t *this) | |
239 | { | |
26b55dc6 MW |
240 | enumerator_t *enumerator; |
241 | task_t *task; | |
242 | message_t *message; | |
243 | host_t *me, *other; | |
244 | status_t status; | |
73aaf76b | 245 | exchange_type_t exchange = EXCHANGE_TYPE_UNDEFINED; |
3e246c48 | 246 | bool new_mid = FALSE; |
73aaf76b MW |
247 | |
248 | if (!this->rng) | |
249 | { | |
250 | DBG1(DBG_IKE, "no RNG supported"); | |
251 | return FAILED; | |
252 | } | |
26b55dc6 MW |
253 | |
254 | if (this->initiating.type != EXCHANGE_TYPE_UNDEFINED) | |
255 | { | |
256 | DBG2(DBG_IKE, "delaying task initiation, %N exchange in progress", | |
257 | exchange_type_names, this->initiating.type); | |
258 | /* do not initiate if we already have a message in the air */ | |
259 | return SUCCESS; | |
260 | } | |
261 | ||
262 | if (this->active_tasks->get_count(this->active_tasks) == 0) | |
263 | { | |
264 | DBG2(DBG_IKE, "activating new tasks"); | |
265 | switch (this->ike_sa->get_state(this->ike_sa)) | |
266 | { | |
267 | case IKE_CREATED: | |
a2f8fc97 | 268 | activate_task(this, TASK_VENDOR_V1); |
0bcdb8e5 | 269 | activate_task(this, TASK_IKE_CERT_PRE_V1); |
a09972df | 270 | if (activate_task(this, TASK_MAIN_MODE)) |
26b55dc6 MW |
271 | { |
272 | exchange = ID_PROT; | |
1cc4ec46 | 273 | activate_task(this, TASK_IKE_NATD_V1); |
26b55dc6 MW |
274 | } |
275 | break; | |
c5dc9d33 CO |
276 | case IKE_CONNECTING: |
277 | if (activate_task(this, TASK_XAUTH_REQUEST)) | |
744c0801 | 278 | { |
c5dc9d33 | 279 | exchange = TRANSACTION; |
3e246c48 | 280 | new_mid = TRUE; |
744c0801 | 281 | } |
c5dc9d33 CO |
282 | break; |
283 | case IKE_ESTABLISHED: | |
284 | if (activate_task(this, TASK_QUICK_MODE)) | |
23f4e4b4 | 285 | { |
c5dc9d33 | 286 | exchange = QUICK_MODE; |
3e246c48 MW |
287 | new_mid = TRUE; |
288 | break; | |
23f4e4b4 | 289 | } |
744c0801 | 290 | break; |
26b55dc6 MW |
291 | default: |
292 | break; | |
293 | } | |
294 | } | |
295 | else | |
296 | { | |
297 | DBG2(DBG_IKE, "reinitiating already active tasks"); | |
298 | enumerator = this->active_tasks->create_enumerator(this->active_tasks); | |
299 | while (enumerator->enumerate(enumerator, (void**)&task)) | |
300 | { | |
301 | DBG2(DBG_IKE, " %N task", task_type_names, task->get_type(task)); | |
302 | switch (task->get_type(task)) | |
303 | { | |
a09972df | 304 | case TASK_MAIN_MODE: |
26b55dc6 MW |
305 | exchange = ID_PROT; |
306 | break; | |
744c0801 MW |
307 | case TASK_QUICK_MODE: |
308 | exchange = QUICK_MODE; | |
309 | break; | |
52ac2ceb CO |
310 | case TASK_XAUTH_REQUEST: |
311 | exchange = TRANSACTION; | |
312 | new_mid = TRUE; | |
313 | break; | |
26b55dc6 MW |
314 | default: |
315 | continue; | |
316 | } | |
317 | break; | |
318 | } | |
319 | enumerator->destroy(enumerator); | |
320 | } | |
321 | ||
73aaf76b | 322 | if (exchange == EXCHANGE_TYPE_UNDEFINED) |
26b55dc6 MW |
323 | { |
324 | DBG2(DBG_IKE, "nothing to initiate"); | |
325 | /* nothing to do yet... */ | |
326 | return SUCCESS; | |
327 | } | |
328 | ||
329 | me = this->ike_sa->get_my_host(this->ike_sa); | |
330 | other = this->ike_sa->get_other_host(this->ike_sa); | |
331 | ||
332 | message = message_create(IKEV1_MAJOR_VERSION, IKEV1_MINOR_VERSION); | |
3e246c48 | 333 | if (new_mid) |
26b55dc6 | 334 | { |
73aaf76b MW |
335 | this->rng->get_bytes(this->rng, sizeof(this->initiating.mid), |
336 | (void*)&this->initiating.mid); | |
26b55dc6 | 337 | } |
3e246c48 | 338 | message->set_message_id(message, this->initiating.mid); |
26b55dc6 MW |
339 | message->set_source(message, me->clone(me)); |
340 | message->set_destination(message, other->clone(other)); | |
341 | message->set_exchange_type(message, exchange); | |
342 | this->initiating.type = exchange; | |
343 | this->initiating.retransmitted = 0; | |
344 | ||
345 | enumerator = this->active_tasks->create_enumerator(this->active_tasks); | |
346 | while (enumerator->enumerate(enumerator, (void*)&task)) | |
347 | { | |
348 | switch (task->build(task, message)) | |
349 | { | |
350 | case SUCCESS: | |
351 | /* task completed, remove it */ | |
352 | this->active_tasks->remove_at(this->active_tasks, enumerator); | |
353 | task->destroy(task); | |
354 | break; | |
355 | case NEED_MORE: | |
356 | /* processed, but task needs another exchange */ | |
357 | break; | |
358 | case FAILED: | |
359 | default: | |
360 | if (this->ike_sa->get_state(this->ike_sa) != IKE_CONNECTING) | |
361 | { | |
362 | charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE); | |
363 | } | |
364 | /* FALL */ | |
365 | case DESTROY_ME: | |
366 | /* critical failure, destroy IKE_SA */ | |
367 | enumerator->destroy(enumerator); | |
368 | message->destroy(message); | |
369 | flush(this); | |
370 | return DESTROY_ME; | |
371 | } | |
372 | } | |
373 | enumerator->destroy(enumerator); | |
374 | ||
375 | /* update exchange type if a task changed it */ | |
376 | this->initiating.type = message->get_exchange_type(message); | |
377 | ||
378 | status = this->ike_sa->generate_message(this->ike_sa, message, | |
379 | &this->initiating.packet); | |
380 | if (status != SUCCESS) | |
381 | { | |
382 | /* message generation failed. There is nothing more to do than to | |
383 | * close the SA */ | |
384 | message->destroy(message); | |
385 | flush(this); | |
386 | charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE); | |
387 | return DESTROY_ME; | |
388 | } | |
389 | message->destroy(message); | |
390 | ||
391 | charon->sender->send(charon->sender, | |
392 | this->initiating.packet->clone(this->initiating.packet)); | |
393 | ||
394 | return SUCCESS; | |
4a09d9ee MW |
395 | } |
396 | ||
397 | /** | |
398 | * handle exchange collisions | |
399 | */ | |
400 | static bool handle_collisions(private_task_manager_t *this, task_t *task) | |
401 | { | |
402 | return FALSE; | |
403 | } | |
404 | ||
405 | /** | |
406 | * build a response depending on the "passive" task list | |
407 | */ | |
408 | static status_t build_response(private_task_manager_t *this, message_t *request) | |
409 | { | |
410 | enumerator_t *enumerator; | |
411 | task_t *task; | |
412 | message_t *message; | |
413 | host_t *me, *other; | |
414 | bool delete = FALSE; | |
415 | status_t status; | |
416 | ||
417 | me = request->get_destination(request); | |
418 | other = request->get_source(request); | |
419 | ||
420 | message = message_create(IKEV1_MAJOR_VERSION, IKEV1_MINOR_VERSION); | |
421 | message->set_exchange_type(message, request->get_exchange_type(request)); | |
422 | /* send response along the path the request came in */ | |
423 | message->set_source(message, me->clone(me)); | |
424 | message->set_destination(message, other->clone(other)); | |
73aaf76b | 425 | message->set_message_id(message, request->get_message_id(request)); |
4a09d9ee MW |
426 | message->set_request(message, FALSE); |
427 | ||
428 | enumerator = this->passive_tasks->create_enumerator(this->passive_tasks); | |
429 | while (enumerator->enumerate(enumerator, (void*)&task)) | |
430 | { | |
431 | switch (task->build(task, message)) | |
432 | { | |
433 | case SUCCESS: | |
434 | /* task completed, remove it */ | |
435 | this->passive_tasks->remove_at(this->passive_tasks, enumerator); | |
436 | if (!handle_collisions(this, task)) | |
437 | { | |
438 | task->destroy(task); | |
439 | } | |
440 | break; | |
441 | case NEED_MORE: | |
442 | /* processed, but task needs another exchange */ | |
443 | if (handle_collisions(this, task)) | |
444 | { | |
445 | this->passive_tasks->remove_at(this->passive_tasks, | |
446 | enumerator); | |
447 | } | |
448 | break; | |
449 | case FAILED: | |
450 | default: | |
451 | charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE); | |
452 | /* FALL */ | |
453 | case DESTROY_ME: | |
454 | /* destroy IKE_SA, but SEND response first */ | |
455 | delete = TRUE; | |
456 | break; | |
457 | } | |
458 | if (delete) | |
459 | { | |
460 | break; | |
461 | } | |
462 | } | |
463 | enumerator->destroy(enumerator); | |
464 | ||
465 | /* message complete, send it */ | |
466 | DESTROY_IF(this->responding.packet); | |
467 | this->responding.packet = NULL; | |
468 | status = this->ike_sa->generate_message(this->ike_sa, message, | |
469 | &this->responding.packet); | |
470 | message->destroy(message); | |
471 | if (status != SUCCESS) | |
472 | { | |
473 | charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE); | |
474 | return DESTROY_ME; | |
475 | } | |
476 | ||
477 | charon->sender->send(charon->sender, | |
478 | this->responding.packet->clone(this->responding.packet)); | |
479 | if (delete) | |
480 | { | |
481 | return DESTROY_ME; | |
482 | } | |
483 | return SUCCESS; | |
484 | } | |
485 | ||
486 | /** | |
487 | * handle an incoming request message | |
488 | */ | |
489 | static status_t process_request(private_task_manager_t *this, | |
490 | message_t *message) | |
491 | { | |
492 | enumerator_t *enumerator; | |
493 | task_t *task = NULL; | |
8cb6f4f9 | 494 | bool send_response = FALSE; |
07abb470 CO |
495 | payload_t *payload; |
496 | notify_payload_t *notify; | |
4a09d9ee MW |
497 | |
498 | if (this->passive_tasks->get_count(this->passive_tasks) == 0) | |
499 | { /* create tasks depending on request type, if not already some queued */ | |
500 | switch (message->get_exchange_type(message)) | |
501 | { | |
502 | case ID_PROT: | |
a2f8fc97 | 503 | task = (task_t *)ike_vendor_v1_create(this->ike_sa, FALSE); |
01685247 | 504 | this->passive_tasks->insert_last(this->passive_tasks, task); |
0bcdb8e5 | 505 | task = (task_t*)ike_cert_pre_v1_create(this->ike_sa, FALSE); |
8ad5cd1f | 506 | this->passive_tasks->insert_last(this->passive_tasks, task); |
c73c832c MW |
507 | task = (task_t *)main_mode_create(this->ike_sa, FALSE); |
508 | this->passive_tasks->insert_last(this->passive_tasks, task); | |
1cc4ec46 TB |
509 | task = (task_t *)ike_natd_v1_create(this->ike_sa, FALSE); |
510 | this->passive_tasks->insert_last(this->passive_tasks, task); | |
4a09d9ee MW |
511 | break; |
512 | case AGGRESSIVE: | |
513 | /* TODO-IKEv1: agressive mode */ | |
514 | return FAILED; | |
515 | case QUICK_MODE: | |
744c0801 MW |
516 | task = (task_t *)quick_mode_create(this->ike_sa, NULL, |
517 | NULL, NULL); | |
518 | this->passive_tasks->insert_last(this->passive_tasks, task); | |
519 | break; | |
4a09d9ee | 520 | case INFORMATIONAL_V1: |
07abb470 CO |
521 | enumerator = message->create_payload_enumerator(message); |
522 | while (enumerator->enumerate(enumerator, &payload)) | |
523 | { | |
524 | switch (payload->get_type(payload)) | |
525 | { | |
526 | case NOTIFY_V1: | |
527 | { | |
528 | notify = (notify_payload_t*)payload; | |
529 | switch (notify->get_notify_type(notify)) | |
530 | { | |
531 | /* TODO-IKEv1: Add notification types here as needed */ | |
532 | case INITIAL_CONTACT_IKEV1: | |
533 | break; | |
534 | default: | |
535 | if(notify->get_notify_type(notify) < 16384) | |
536 | { | |
537 | DBG1(DBG_IKE, "Received %N error notification.", notify_type_names, notify->get_notify_type(notify)); | |
538 | return FAILED; | |
539 | } | |
540 | break; | |
541 | } | |
542 | break; | |
543 | } | |
544 | case DELETE_V1: | |
545 | { | |
546 | /* TODO-IKEv1: Delete payload handling. */ | |
547 | break; | |
548 | } | |
549 | default: | |
550 | break; | |
551 | } | |
552 | if (task) | |
553 | { | |
554 | break; | |
555 | } | |
556 | } | |
557 | enumerator->destroy(enumerator); | |
558 | break; | |
c5dc9d33 CO |
559 | case TRANSACTION: |
560 | task = (task_t *)xauth_request_create(this->ike_sa, FALSE); | |
561 | this->passive_tasks->insert_last(this->passive_tasks, task); | |
562 | break; | |
4a09d9ee MW |
563 | default: |
564 | return FAILED; | |
565 | } | |
566 | } | |
567 | /* let the tasks process the message */ | |
568 | enumerator = this->passive_tasks->create_enumerator(this->passive_tasks); | |
569 | while (enumerator->enumerate(enumerator, (void*)&task)) | |
570 | { | |
571 | switch (task->process(task, message)) | |
572 | { | |
573 | case SUCCESS: | |
574 | /* task completed, remove it */ | |
575 | this->passive_tasks->remove_at(this->passive_tasks, enumerator); | |
576 | task->destroy(task); | |
8cb6f4f9 | 577 | break; |
4a09d9ee MW |
578 | case NEED_MORE: |
579 | /* processed, but task needs at least another call to build() */ | |
8cb6f4f9 | 580 | send_response = TRUE; |
4a09d9ee MW |
581 | break; |
582 | case FAILED: | |
583 | default: | |
584 | charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE); | |
585 | /* FALL */ | |
586 | case DESTROY_ME: | |
587 | /* critical failure, destroy IKE_SA */ | |
588 | this->passive_tasks->remove_at(this->passive_tasks, enumerator); | |
589 | enumerator->destroy(enumerator); | |
590 | task->destroy(task); | |
591 | return DESTROY_ME; | |
592 | } | |
593 | } | |
594 | enumerator->destroy(enumerator); | |
595 | ||
8cb6f4f9 TB |
596 | if (send_response) |
597 | { | |
598 | return build_response(this, message); | |
599 | } | |
600 | return SUCCESS; | |
4a09d9ee MW |
601 | } |
602 | ||
26b55dc6 MW |
603 | /** |
604 | * handle an incoming response message | |
605 | */ | |
606 | static status_t process_response(private_task_manager_t *this, | |
607 | message_t *message) | |
608 | { | |
609 | enumerator_t *enumerator; | |
610 | task_t *task; | |
611 | ||
612 | if (message->get_exchange_type(message) != this->initiating.type) | |
613 | { | |
614 | DBG1(DBG_IKE, "received %N response, but expected %N", | |
615 | exchange_type_names, message->get_exchange_type(message), | |
616 | exchange_type_names, this->initiating.type); | |
617 | charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE); | |
618 | return DESTROY_ME; | |
619 | } | |
620 | ||
621 | enumerator = this->active_tasks->create_enumerator(this->active_tasks); | |
622 | while (enumerator->enumerate(enumerator, (void*)&task)) | |
623 | { | |
624 | switch (task->process(task, message)) | |
625 | { | |
626 | case SUCCESS: | |
627 | /* task completed, remove it */ | |
628 | this->active_tasks->remove_at(this->active_tasks, enumerator); | |
629 | task->destroy(task); | |
630 | break; | |
631 | case NEED_MORE: | |
632 | /* processed, but task needs another exchange */ | |
633 | break; | |
634 | case FAILED: | |
635 | default: | |
636 | charon->bus->ike_updown(charon->bus, this->ike_sa, FALSE); | |
637 | /* FALL */ | |
638 | case DESTROY_ME: | |
639 | /* critical failure, destroy IKE_SA */ | |
640 | this->active_tasks->remove_at(this->active_tasks, enumerator); | |
641 | enumerator->destroy(enumerator); | |
642 | task->destroy(task); | |
643 | return DESTROY_ME; | |
644 | } | |
645 | } | |
646 | enumerator->destroy(enumerator); | |
647 | ||
648 | this->initiating.type = EXCHANGE_TYPE_UNDEFINED; | |
649 | this->initiating.packet->destroy(this->initiating.packet); | |
650 | this->initiating.packet = NULL; | |
651 | ||
652 | return initiate(this); | |
653 | } | |
654 | ||
b235e69c TB |
655 | /** |
656 | * Send a notify in a separate INFORMATIONAL exchange back to the sender. | |
657 | */ | |
658 | static void send_notify_response(private_task_manager_t *this, | |
659 | message_t *request, notify_type_t type, | |
660 | chunk_t data) | |
661 | { | |
662 | message_t *response; | |
663 | packet_t *packet; | |
664 | host_t *me, *other; | |
665 | u_int32_t mid; | |
666 | ||
6be8d33d TB |
667 | if (request->get_exchange_type(request) == INFORMATIONAL_V1) |
668 | { /* don't respond to INFORMATIONAL requests to avoid a notify war */ | |
669 | DBG1(DBG_IKE, "ignore malformed INFORMATIONAL request"); | |
670 | return; | |
671 | } | |
672 | ||
b235e69c TB |
673 | response = message_create(IKEV1_MAJOR_VERSION, IKEV1_MINOR_VERSION); |
674 | response->set_exchange_type(response, INFORMATIONAL_V1); | |
675 | response->set_request(response, TRUE); | |
676 | this->rng->get_bytes(this->rng, sizeof(mid), (void*)&mid); | |
677 | response->set_message_id(response, mid); | |
678 | response->add_notify(response, FALSE, type, data); | |
679 | me = this->ike_sa->get_my_host(this->ike_sa); | |
680 | if (me->is_anyaddr(me)) | |
681 | { | |
682 | me = request->get_destination(request); | |
683 | this->ike_sa->set_my_host(this->ike_sa, me->clone(me)); | |
684 | } | |
685 | other = this->ike_sa->get_other_host(this->ike_sa); | |
686 | if (other->is_anyaddr(other)) | |
687 | { | |
688 | other = request->get_source(request); | |
689 | this->ike_sa->set_other_host(this->ike_sa, other->clone(other)); | |
690 | } | |
691 | response->set_source(response, me->clone(me)); | |
692 | response->set_destination(response, other->clone(other)); | |
693 | if (this->ike_sa->generate_message(this->ike_sa, response, | |
694 | &packet) == SUCCESS) | |
695 | { | |
696 | charon->sender->send(charon->sender, packet); | |
697 | } | |
698 | response->destroy(response); | |
699 | } | |
700 | ||
701 | /** | |
702 | * Parse the given message and verify that it is valid. | |
703 | */ | |
704 | static status_t parse_message(private_task_manager_t *this, message_t *msg) | |
705 | { | |
706 | status_t status; | |
707 | ||
708 | status = msg->parse_body(msg, this->ike_sa->get_keymat(this->ike_sa)); | |
709 | ||
710 | if (status != SUCCESS) | |
711 | { | |
712 | switch (status) | |
713 | { | |
29a5e070 TB |
714 | case NOT_SUPPORTED: |
715 | DBG1(DBG_IKE, "unsupported exchange type"); | |
716 | send_notify_response(this, msg, | |
717 | INVALID_EXCHANGE_TYPE, chunk_empty); | |
718 | break; | |
b235e69c TB |
719 | case PARSE_ERROR: |
720 | DBG1(DBG_IKE, "message parsing failed"); | |
721 | send_notify_response(this, msg, | |
722 | PAYLOAD_MALFORMED, chunk_empty); | |
723 | break; | |
724 | case VERIFY_ERROR: | |
725 | DBG1(DBG_IKE, "message verification failed"); | |
726 | send_notify_response(this, msg, | |
727 | PAYLOAD_MALFORMED, chunk_empty); | |
728 | break; | |
729 | case FAILED: | |
730 | DBG1(DBG_IKE, "integrity check failed"); | |
731 | send_notify_response(this, msg, | |
37639e94 | 732 | INVALID_HASH_INFORMATION, chunk_empty); |
b235e69c TB |
733 | break; |
734 | case INVALID_STATE: | |
735 | DBG1(DBG_IKE, "found encrypted message, but no keys available"); | |
736 | send_notify_response(this, msg, | |
737 | PAYLOAD_MALFORMED, chunk_empty); | |
738 | default: | |
739 | break; | |
740 | } | |
741 | DBG1(DBG_IKE, "%N %s with message ID %d processing failed", | |
742 | exchange_type_names, msg->get_exchange_type(msg), | |
743 | msg->get_request(msg) ? "request" : "response", | |
744 | msg->get_message_id(msg)); | |
745 | ||
746 | if (this->ike_sa->get_state(this->ike_sa) == IKE_CREATED) | |
747 | { /* invalid initiation attempt, close SA */ | |
748 | return DESTROY_ME; | |
749 | } | |
750 | } | |
751 | return status; | |
752 | } | |
753 | ||
4a09d9ee MW |
754 | METHOD(task_manager_t, process_message, status_t, |
755 | private_task_manager_t *this, message_t *msg) | |
756 | { | |
73aaf76b | 757 | u_int32_t hash, mid; |
3d59c5c3 | 758 | host_t *me, *other; |
68c6863b | 759 | status_t status; |
73aaf76b | 760 | |
1960312c | 761 | /* TODO-IKEv1: update hosts more selectively */ |
3d59c5c3 TB |
762 | me = msg->get_destination(msg); |
763 | other = msg->get_source(msg); | |
68c6863b | 764 | mid = msg->get_message_id(msg); |
1960312c | 765 | |
73aaf76b MW |
766 | if ((mid && mid == this->initiating.mid) || |
767 | (this->initiating.mid == 0 && | |
768 | this->active_tasks->get_count(this->active_tasks))) | |
4a09d9ee | 769 | { |
7519106d | 770 | msg->set_request(msg, FALSE); |
b235e69c | 771 | status = parse_message(this, msg); |
1960312c TB |
772 | if (status != SUCCESS) |
773 | { | |
774 | return status; | |
775 | } | |
776 | this->ike_sa->set_statistic(this->ike_sa, STAT_INBOUND, | |
777 | time_monotonic(NULL)); | |
3d59c5c3 | 778 | this->ike_sa->update_hosts(this->ike_sa, me, other, TRUE); |
73aaf76b MW |
779 | charon->bus->message(charon->bus, msg, FALSE); |
780 | if (process_response(this, msg) != SUCCESS) | |
4a09d9ee MW |
781 | { |
782 | flush(this); | |
783 | return DESTROY_ME; | |
784 | } | |
785 | } | |
786 | else | |
787 | { | |
9cc8bd4f MW |
788 | hash = chunk_hash(msg->get_packet_data(msg)); |
789 | if (hash == this->responding.hash) | |
73aaf76b MW |
790 | { |
791 | DBG1(DBG_IKE, "received retransmit of request with ID %d, " | |
792 | "retransmitting response", mid); | |
793 | charon->sender->send(charon->sender, | |
794 | this->responding.packet->clone(this->responding.packet)); | |
795 | return SUCCESS; | |
796 | } | |
7519106d | 797 | msg->set_request(msg, TRUE); |
b235e69c | 798 | status = parse_message(this, msg); |
1960312c TB |
799 | if (status != SUCCESS) |
800 | { | |
801 | return status; | |
802 | } | |
803 | /* if this IKE_SA is virgin, we check for a config */ | |
804 | if (this->ike_sa->get_ike_cfg(this->ike_sa) == NULL) | |
805 | { | |
806 | ike_sa_id_t *ike_sa_id; | |
807 | ike_cfg_t *ike_cfg; | |
808 | job_t *job; | |
809 | ike_cfg = charon->backends->get_ike_cfg(charon->backends, me, other); | |
810 | if (ike_cfg == NULL) | |
811 | { | |
812 | /* no config found for these hosts, destroy */ | |
4cfd0db8 TB |
813 | DBG1(DBG_IKE, "no IKE config found for %H...%H, sending %N", |
814 | me, other, notify_type_names, NO_PROPOSAL_CHOSEN); | |
815 | send_notify_response(this, msg, | |
816 | NO_PROPOSAL_CHOSEN, chunk_empty); | |
1960312c TB |
817 | return DESTROY_ME; |
818 | } | |
819 | this->ike_sa->set_ike_cfg(this->ike_sa, ike_cfg); | |
820 | ike_cfg->destroy(ike_cfg); | |
821 | /* add a timeout if peer does not establish it completely */ | |
822 | ike_sa_id = this->ike_sa->get_id(this->ike_sa); | |
823 | job = (job_t*)delete_ike_sa_job_create(ike_sa_id, FALSE); | |
824 | lib->scheduler->schedule_job(lib->scheduler, job, | |
825 | lib->settings->get_int(lib->settings, | |
826 | "charon.half_open_timeout", HALF_OPEN_IKE_SA_TIMEOUT)); | |
827 | } | |
828 | this->ike_sa->set_statistic(this->ike_sa, STAT_INBOUND, | |
829 | time_monotonic(NULL)); | |
3d59c5c3 | 830 | this->ike_sa->update_hosts(this->ike_sa, me, other, TRUE); |
73aaf76b MW |
831 | charon->bus->message(charon->bus, msg, TRUE); |
832 | if (process_request(this, msg) != SUCCESS) | |
26b55dc6 MW |
833 | { |
834 | flush(this); | |
835 | return DESTROY_ME; | |
836 | } | |
73aaf76b | 837 | |
73aaf76b | 838 | this->responding.mid = mid; |
9cc8bd4f | 839 | this->responding.hash = hash; |
4a09d9ee MW |
840 | } |
841 | return SUCCESS; | |
842 | } | |
843 | ||
844 | METHOD(task_manager_t, queue_task, void, | |
845 | private_task_manager_t *this, task_t *task) | |
846 | { | |
847 | DBG2(DBG_IKE, "queueing %N task", task_type_names, task->get_type(task)); | |
848 | this->queued_tasks->insert_last(this->queued_tasks, task); | |
849 | } | |
850 | ||
851 | METHOD(task_manager_t, adopt_tasks, void, | |
852 | private_task_manager_t *this, task_manager_t *other_public) | |
853 | { | |
854 | private_task_manager_t *other = (private_task_manager_t*)other_public; | |
855 | task_t *task; | |
856 | ||
857 | /* move queued tasks from other to this */ | |
858 | while (other->queued_tasks->remove_last(other->queued_tasks, | |
859 | (void**)&task) == SUCCESS) | |
860 | { | |
861 | DBG2(DBG_IKE, "migrating %N task", task_type_names, task->get_type(task)); | |
862 | task->migrate(task, this->ike_sa); | |
863 | this->queued_tasks->insert_first(this->queued_tasks, task); | |
864 | } | |
865 | } | |
866 | ||
867 | METHOD(task_manager_t, busy, bool, | |
868 | private_task_manager_t *this) | |
869 | { | |
870 | return (this->active_tasks->get_count(this->active_tasks) > 0); | |
871 | } | |
872 | ||
873 | METHOD(task_manager_t, incr_mid, void, | |
874 | private_task_manager_t *this, bool initiate) | |
875 | { | |
4a09d9ee MW |
876 | } |
877 | ||
878 | METHOD(task_manager_t, reset, void, | |
879 | private_task_manager_t *this, u_int32_t initiate, u_int32_t respond) | |
880 | { | |
4a09d9ee MW |
881 | } |
882 | ||
883 | METHOD(task_manager_t, create_task_enumerator, enumerator_t*, | |
884 | private_task_manager_t *this, task_queue_t queue) | |
885 | { | |
886 | switch (queue) | |
887 | { | |
888 | case TASK_QUEUE_ACTIVE: | |
889 | return this->active_tasks->create_enumerator(this->active_tasks); | |
890 | case TASK_QUEUE_PASSIVE: | |
891 | return this->passive_tasks->create_enumerator(this->passive_tasks); | |
892 | case TASK_QUEUE_QUEUED: | |
893 | return this->queued_tasks->create_enumerator(this->queued_tasks); | |
894 | default: | |
895 | return enumerator_create_empty(); | |
896 | } | |
897 | } | |
898 | ||
899 | METHOD(task_manager_t, destroy, void, | |
900 | private_task_manager_t *this) | |
901 | { | |
902 | flush(this); | |
903 | ||
904 | this->active_tasks->destroy(this->active_tasks); | |
905 | this->queued_tasks->destroy(this->queued_tasks); | |
906 | this->passive_tasks->destroy(this->passive_tasks); | |
907 | ||
908 | DESTROY_IF(this->responding.packet); | |
909 | DESTROY_IF(this->initiating.packet); | |
73aaf76b | 910 | DESTROY_IF(this->rng); |
4a09d9ee MW |
911 | free(this); |
912 | } | |
913 | ||
914 | /* | |
915 | * see header file | |
916 | */ | |
917 | task_manager_v1_t *task_manager_v1_create(ike_sa_t *ike_sa) | |
918 | { | |
919 | private_task_manager_t *this; | |
920 | ||
921 | INIT(this, | |
922 | .public = { | |
923 | .task_manager = { | |
924 | .process_message = _process_message, | |
925 | .queue_task = _queue_task, | |
926 | .initiate = _initiate, | |
927 | .retransmit = _retransmit, | |
928 | .incr_mid = _incr_mid, | |
929 | .reset = _reset, | |
930 | .adopt_tasks = _adopt_tasks, | |
931 | .busy = _busy, | |
932 | .create_task_enumerator = _create_task_enumerator, | |
933 | .destroy = _destroy, | |
934 | }, | |
935 | }, | |
936 | .ike_sa = ike_sa, | |
937 | .initiating.type = EXCHANGE_TYPE_UNDEFINED, | |
73aaf76b | 938 | .rng = lib->crypto->create_rng(lib->crypto, RNG_WEAK), |
4a09d9ee MW |
939 | .queued_tasks = linked_list_create(), |
940 | .active_tasks = linked_list_create(), | |
941 | .passive_tasks = linked_list_create(), | |
942 | .retransmit_tries = lib->settings->get_int(lib->settings, | |
943 | "charon.retransmit_tries", RETRANSMIT_TRIES), | |
944 | .retransmit_timeout = lib->settings->get_double(lib->settings, | |
945 | "charon.retransmit_timeout", RETRANSMIT_TIMEOUT), | |
946 | .retransmit_base = lib->settings->get_double(lib->settings, | |
947 | "charon.retransmit_base", RETRANSMIT_BASE), | |
948 | ); | |
949 | ||
950 | return &this->public; | |
951 | } |