src/libcharon/sa/ikev1/tasks/quick_mode.c

   1 /*
   2  * Copyright (C) 2012-2015 Tobias Brunner
   3  * Hochschule fuer Technik Rapperswil
   4  *
   5  * Copyright (C) 2011 Martin Willi
   6  * Copyright (C) 2011 revosec AG
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by the
  10  * Free Software Foundation; either version 2 of the License, or (at your
  11  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  15  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16  * for more details.
  17  */
  18
  19 /*
  20  * Copyright (C) 2012 Volker Rümelin
  21  *
  22  * Permission is hereby granted, free of charge, to any person obtaining a copy
  23  * of this software and associated documentation files (the "Software"), to deal
  24  * in the Software without restriction, including without limitation the rights
  25  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  26  * copies of the Software, and to permit persons to whom the Software is
  27  * furnished to do so, subject to the following conditions:
  28  *
  29  * The above copyright notice and this permission notice shall be included in
  30  * all copies or substantial portions of the Software.
  31  *
  32  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  33  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  34  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  35  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  36  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  37  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  38  * THE SOFTWARE.
  39  */
  40
  41 #include "quick_mode.h"
  42
  43 #include <string.h>
  44
  45 #include <daemon.h>
  46 #include <sa/ikev1/keymat_v1.h>
  47 #include <encoding/payloads/sa_payload.h>
  48 #include <encoding/payloads/nonce_payload.h>
  49 #include <encoding/payloads/ke_payload.h>
  50 #include <encoding/payloads/id_payload.h>
  51 #include <encoding/payloads/payload.h>
  52 #include <sa/ikev1/tasks/informational.h>
  53 #include <sa/ikev1/tasks/quick_delete.h>
  54 #include <processing/jobs/inactivity_job.h>
  55
  56 typedef struct private_quick_mode_t private_quick_mode_t;
  57
  58 /**
  59  * Private members of a quick_mode_t task.
  60  */
  61 struct private_quick_mode_t {
  62
  63         /**
  64          * Public methods and task_t interface.
  65          */
  66         quick_mode_t public;
  67
  68         /**
  69          * Assigned IKE_SA.
  70          */
  71         ike_sa_t *ike_sa;
  72
  73         /**
  74          * TRUE if we are initiating quick mode
  75          */
  76         bool initiator;
  77
  78         /**
  79          * Traffic selector of initiator
  80          */
  81         traffic_selector_t *tsi;
  82
  83         /**
  84          * Traffic selector of responder
  85          */
  86         traffic_selector_t *tsr;
  87
  88         /**
  89          * Initiators nonce
  90          */
  91         chunk_t nonce_i;
  92
  93         /**
  94          * Responder nonce
  95          */
  96         chunk_t nonce_r;
  97
  98         /**
  99          * Initiators ESP SPI
 100          */
 101         uint32_t spi_i;
 102
 103         /**
 104          * Responder ESP SPI
 105          */
 106         uint32_t spi_r;
 107
 108         /**
 109          * Initiators IPComp CPI
 110          */
 111         uint16_t cpi_i;
 112
 113         /**
 114          * Responders IPComp CPI
 115          */
 116         uint16_t cpi_r;
 117
 118         /**
 119          * selected CHILD_SA proposal
 120          */
 121         proposal_t *proposal;
 122
 123         /**
 124          * Config of CHILD_SA to establish
 125          */
 126         child_cfg_t *config;
 127
 128         /**
 129          * CHILD_SA we are about to establish
 130          */
 131         child_sa_t *child_sa;
 132
 133         /**
 134          * IKEv1 keymat
 135          */
 136         keymat_v1_t *keymat;
 137
 138         /**
 139          * DH exchange, when PFS is in use
 140          */
 141         diffie_hellman_t *dh;
 142
 143         /**
 144          * Negotiated lifetime of new SA
 145          */
 146         uint32_t lifetime;
 147
 148         /**
 149          * Negotiated lifebytes of new SA
 150          */
 151         uint64_t lifebytes;
 152
 153         /**
 154          * Reqid to use, 0 for auto-allocate
 155          */
 156         uint32_t reqid;
 157
 158         /**
 159          * Explicit inbound mark value to use, if any
 160          */
 161         u_int mark_in;
 162
 163         /**
 164          * Explicit inbound mark value to use, if any
 165          */
 166         u_int mark_out;
 167
 168         /**
 169          * SPI of SA we rekey
 170          */
 171         uint32_t rekey;
 172
 173         /**
 174          * Delete old child after successful rekey
 175          */
 176         bool delete;
 177
 178         /**
 179          * Negotiated mode, tunnel or transport
 180          */
 181         ipsec_mode_t mode;
 182
 183         /*
 184          * SA protocol (ESP|AH) negotiated
 185          */
 186         protocol_id_t proto;
 187
 188         /**
 189          * Use UDP encapsulation
 190          */
 191         bool udp;
 192
 193         /**
 194          * Message ID of handled quick mode exchange
 195          */
 196         uint32_t mid;
 197
 198         /** states of quick mode */
 199         enum {
 200                 QM_INIT,
 201                 QM_NEGOTIATED,
 202         } state;
 203 };
 204
 205 /**
 206  * Schedule inactivity timeout for CHILD_SA with reqid, if enabled
 207  */
 208 static void schedule_inactivity_timeout(private_quick_mode_t *this)
 209 {
 210         uint32_t timeout;
 211         bool close_ike;
 212
 213         timeout = this->config->get_inactivity(this->config);
 214         if (timeout)
 215         {
 216                 close_ike = lib->settings->get_bool(lib->settings,
 217                                                                         "%s.inactivity_close_ike", FALSE, lib->ns);
 218                 lib->scheduler->schedule_job(lib->scheduler, (job_t*)
 219                         inactivity_job_create(this->child_sa->get_unique_id(this->child_sa),
 220                                                                   timeout, close_ike), timeout);
 221         }
 222 }
 223
 224 /**
 225  * Check if we have a an address pool configured
 226  */
 227 static bool have_pool(ike_sa_t *ike_sa)
 228 {
 229         enumerator_t *enumerator;
 230         peer_cfg_t *peer_cfg;
 231         char *pool;
 232         bool found = FALSE;
 233
 234         peer_cfg = ike_sa->get_peer_cfg(ike_sa);
 235         if (peer_cfg)
 236         {
 237                 enumerator = peer_cfg->create_pool_enumerator(peer_cfg);
 238                 if (enumerator->enumerate(enumerator, &pool))
 239                 {
 240                         found = TRUE;
 241                 }
 242                 enumerator->destroy(enumerator);
 243         }
 244         return found;
 245 }
 246
 247 /**
 248  * Get hosts to use for dynamic traffic selectors
 249  */
 250 static linked_list_t *get_dynamic_hosts(ike_sa_t *ike_sa, bool local)
 251 {
 252         enumerator_t *enumerator;
 253         linked_list_t *list;
 254         host_t *host;
 255
 256         list = linked_list_create();
 257         enumerator = ike_sa->create_virtual_ip_enumerator(ike_sa, local);
 258         while (enumerator->enumerate(enumerator, &host))
 259         {
 260                 list->insert_last(list, host);
 261         }
 262         enumerator->destroy(enumerator);
 263
 264         if (list->get_count(list) == 0)
 265         {       /* no virtual IPs assigned */
 266                 if (local)
 267                 {
 268                         host = ike_sa->get_my_host(ike_sa);
 269                         list->insert_last(list, host);
 270                 }
 271                 else if (!have_pool(ike_sa))
 272                 {       /* use host only if we don't have a pool configured */
 273                         host = ike_sa->get_other_host(ike_sa);
 274                         list->insert_last(list, host);
 275                 }
 276         }
 277         return list;
 278 }
 279
 280 /**
 281  * Install negotiated CHILD_SA
 282  */
 283 static bool install(private_quick_mode_t *this)
 284 {
 285         status_t status, status_i, status_o;
 286         chunk_t encr_i, encr_r, integ_i, integ_r;
 287         linked_list_t *tsi, *tsr, *my_ts, *other_ts;
 288         child_sa_t *old = NULL;
 289
 290         this->child_sa->set_proposal(this->child_sa, this->proposal);
 291         this->child_sa->set_state(this->child_sa, CHILD_INSTALLING);
 292         this->child_sa->set_mode(this->child_sa, this->mode);
 293
 294         if (this->cpi_i && this->cpi_r)
 295         {       /* DEFLATE is the only transform we currently support */
 296                 this->child_sa->set_ipcomp(this->child_sa, IPCOMP_DEFLATE);
 297         }
 298         else
 299         {
 300                 this->cpi_i = this->cpi_r = 0;
 301         }
 302
 303         this->child_sa->set_protocol(this->child_sa,
 304                                                                  this->proposal->get_protocol(this->proposal));
 305
 306         status_i = status_o = FAILED;
 307         encr_i = encr_r = integ_i = integ_r = chunk_empty;
 308         tsi = linked_list_create_with_items(this->tsi->clone(this->tsi), NULL);
 309         tsr = linked_list_create_with_items(this->tsr->clone(this->tsr), NULL);
 310         if (this->initiator)
 311         {
 312                 charon->bus->narrow(charon->bus, this->child_sa,
 313                                                         NARROW_INITIATOR_POST_AUTH, tsi, tsr);
 314         }
 315         else
 316         {
 317                 charon->bus->narrow(charon->bus, this->child_sa,
 318                                                         NARROW_RESPONDER_POST, tsr, tsi);
 319         }
 320         if (tsi->get_count(tsi) == 0 || tsr->get_count(tsr) == 0)
 321         {
 322                 tsi->destroy_offset(tsi, offsetof(traffic_selector_t, destroy));
 323                 tsr->destroy_offset(tsr, offsetof(traffic_selector_t, destroy));
 324                 DBG1(DBG_IKE, "no acceptable traffic selectors found");
 325                 return FALSE;
 326         }
 327
 328         if (this->keymat->derive_child_keys(this->keymat, this->proposal, this->dh,
 329                                                 this->spi_i, this->spi_r, this->nonce_i, this->nonce_r,
 330                                                 &encr_i, &integ_i, &encr_r, &integ_r))
 331         {
 332                 if (this->initiator)
 333                 {
 334                         status_i = this->child_sa->install(this->child_sa,
 335                                                                         encr_r, integ_r, this->spi_i, this->cpi_i,
 336                                                                         this->initiator, TRUE, FALSE, tsi, tsr);
 337                         status_o = this->child_sa->install(this->child_sa,
 338                                                                         encr_i, integ_i, this->spi_r, this->cpi_r,
 339                                                                         this->initiator, FALSE, FALSE, tsi, tsr);
 340                 }
 341                 else
 342                 {
 343                         status_i = this->child_sa->install(this->child_sa,
 344                                                                         encr_i, integ_i, this->spi_r, this->cpi_r,
 345                                                                         this->initiator, TRUE, FALSE, tsr, tsi);
 346                         status_o = this->child_sa->install(this->child_sa,
 347                                                                         encr_r, integ_r, this->spi_i, this->cpi_i,
 348                                                                         this->initiator, FALSE, FALSE, tsr, tsi);
 349                 }
 350         }
 351         chunk_clear(&integ_i);
 352         chunk_clear(&integ_r);
 353         chunk_clear(&encr_i);
 354         chunk_clear(&encr_r);
 355
 356         if (status_i != SUCCESS || status_o != SUCCESS)
 357         {
 358                 DBG1(DBG_IKE, "unable to install %s%s%sIPsec SA (SAD) in kernel",
 359                         (status_i != SUCCESS) ? "inbound " : "",
 360                         (status_i != SUCCESS && status_o != SUCCESS) ? "and ": "",
 361                         (status_o != SUCCESS) ? "outbound " : "");
 362                 tsi->destroy_offset(tsi, offsetof(traffic_selector_t, destroy));
 363                 tsr->destroy_offset(tsr, offsetof(traffic_selector_t, destroy));
 364                 return FALSE;
 365         }
 366
 367         if (this->initiator)
 368         {
 369                 status = this->child_sa->add_policies(this->child_sa, tsi, tsr);
 370         }
 371         else
 372         {
 373                 status = this->child_sa->add_policies(this->child_sa, tsr, tsi);
 374         }
 375         tsi->destroy_offset(tsi, offsetof(traffic_selector_t, destroy));
 376         tsr->destroy_offset(tsr, offsetof(traffic_selector_t, destroy));
 377         if (status != SUCCESS)
 378         {
 379                 DBG1(DBG_IKE, "unable to install IPsec policies (SPD) in kernel");
 380                 return FALSE;
 381         }
 382
 383         charon->bus->child_keys(charon->bus, this->child_sa, this->initiator,
 384                                                         this->dh, this->nonce_i, this->nonce_r);
 385
 386         /* add to IKE_SA, and remove from task */
 387         this->child_sa->set_state(this->child_sa, CHILD_INSTALLED);
 388         this->ike_sa->add_child_sa(this->ike_sa, this->child_sa);
 389
 390         my_ts = linked_list_create_from_enumerator(
 391                                 this->child_sa->create_ts_enumerator(this->child_sa, TRUE));
 392         other_ts = linked_list_create_from_enumerator(
 393                                 this->child_sa->create_ts_enumerator(this->child_sa, FALSE));
 394
 395         DBG0(DBG_IKE, "CHILD_SA %s{%d} established "
 396                  "with SPIs %.8x_i %.8x_o and TS %#R === %#R",
 397                  this->child_sa->get_name(this->child_sa),
 398                  this->child_sa->get_unique_id(this->child_sa),
 399                  ntohl(this->child_sa->get_spi(this->child_sa, TRUE)),
 400                  ntohl(this->child_sa->get_spi(this->child_sa, FALSE)), my_ts, other_ts);
 401
 402         my_ts->destroy(my_ts);
 403         other_ts->destroy(other_ts);
 404
 405         if (this->rekey)
 406         {
 407                 old = this->ike_sa->get_child_sa(this->ike_sa,
 408                                                                 this->proposal->get_protocol(this->proposal),
 409                                                                 this->rekey, TRUE);
 410         }
 411         if (old)
 412         {
 413                 charon->bus->child_rekey(charon->bus, old, this->child_sa);
 414                 /* rekeyed CHILD_SAs stay installed until they expire or are deleted
 415                  * by the other peer */
 416                 old->set_state(old, CHILD_REKEYED);
 417                 /* as initiator we delete the CHILD_SA if configured to do so */
 418                 if (this->initiator && this->delete)
 419                 {
 420                         this->ike_sa->queue_task(this->ike_sa,
 421                                 (task_t*)quick_delete_create(this->ike_sa,
 422                                                                 this->proposal->get_protocol(this->proposal),
 423                                                                 this->rekey, TRUE, FALSE));
 424                 }
 425         }
 426         else
 427         {
 428                 charon->bus->child_updown(charon->bus, this->child_sa, TRUE);
 429         }
 430         schedule_inactivity_timeout(this);
 431         this->child_sa = NULL;
 432         return TRUE;
 433 }
 434
 435 /**
 436  * Generate and add NONCE
 437  */
 438 static bool add_nonce(private_quick_mode_t *this, chunk_t *nonce,
 439                                           message_t *message)
 440 {
 441         nonce_payload_t *nonce_payload;
 442         nonce_gen_t *nonceg;
 443
 444         nonceg = this->keymat->keymat.create_nonce_gen(&this->keymat->keymat);
 445         if (!nonceg)
 446         {
 447                 DBG1(DBG_IKE, "no nonce generator found to create nonce");
 448                 return FALSE;
 449         }
 450         if (!nonceg->allocate_nonce(nonceg, NONCE_SIZE, nonce))
 451         {
 452                 DBG1(DBG_IKE, "nonce allocation failed");
 453                 nonceg->destroy(nonceg);
 454                 return FALSE;
 455         }
 456         nonceg->destroy(nonceg);
 457
 458         nonce_payload = nonce_payload_create(PLV1_NONCE);
 459         nonce_payload->set_nonce(nonce_payload, *nonce);
 460         message->add_payload(message, &nonce_payload->payload_interface);
 461
 462         return TRUE;
 463 }
 464
 465 /**
 466  * Extract nonce from NONCE payload
 467  */
 468 static bool get_nonce(private_quick_mode_t *this, chunk_t *nonce,
 469                                           message_t *message)
 470 {
 471         nonce_payload_t *nonce_payload;
 472
 473         nonce_payload = (nonce_payload_t*)message->get_payload(message, PLV1_NONCE);
 474         if (!nonce_payload)
 475         {
 476                 DBG1(DBG_IKE, "NONCE payload missing in message");
 477                 return FALSE;
 478         }
 479         *nonce = nonce_payload->get_nonce(nonce_payload);
 480
 481         return TRUE;
 482 }
 483
 484 /**
 485  * Add KE payload to message
 486  */
 487 static bool add_ke(private_quick_mode_t *this, message_t *message)
 488 {
 489         ke_payload_t *ke_payload;
 490
 491         ke_payload = ke_payload_create_from_diffie_hellman(PLV1_KEY_EXCHANGE,
 492                                                                                                            this->dh);
 493         if (!ke_payload)
 494         {
 495                 DBG1(DBG_IKE, "creating KE payload failed");
 496                 return FALSE;
 497         }
 498         message->add_payload(message, &ke_payload->payload_interface);
 499         return TRUE;
 500 }
 501
 502 /**
 503  * Get DH value from a KE payload
 504  */
 505 static bool get_ke(private_quick_mode_t *this, message_t *message)
 506 {
 507         ke_payload_t *ke_payload;
 508
 509         ke_payload = (ke_payload_t*)message->get_payload(message, PLV1_KEY_EXCHANGE);
 510         if (!ke_payload)
 511         {
 512                 DBG1(DBG_IKE, "KE payload missing");
 513                 return FALSE;
 514         }
 515         if (!this->dh->set_other_public_value(this->dh,
 516                                                                 ke_payload->get_key_exchange_data(ke_payload)))
 517         {
 518                 DBG1(DBG_IKE, "unable to apply received KE value");
 519                 return FALSE;
 520         }
 521         return TRUE;
 522 }
 523
 524 /**
 525  * Select a traffic selector from configuration
 526  */
 527 static traffic_selector_t* select_ts(private_quick_mode_t *this, bool local,
 528                                                                          linked_list_t *supplied)
 529 {
 530         traffic_selector_t *ts;
 531         linked_list_t *list, *hosts;
 532
 533         hosts = get_dynamic_hosts(this->ike_sa, local);
 534         list = this->config->get_traffic_selectors(this->config,
 535                                                                                            local, supplied, hosts);
 536         hosts->destroy(hosts);
 537         if (list->get_first(list, (void**)&ts) == SUCCESS)
 538         {
 539                 ts = ts->clone(ts);
 540         }
 541         else
 542         {
 543                 DBG1(DBG_IKE, "%s traffic selector missing in configuration",
 544                          local ? "local" : "remote");
 545                 ts = NULL;
 546         }
 547         list->destroy_offset(list, offsetof(traffic_selector_t, destroy));
 548         return ts;
 549 }
 550
 551 /**
 552  * Add selected traffic selectors to message
 553  */
 554 static void add_ts(private_quick_mode_t *this, message_t *message)
 555 {
 556         id_payload_t *id_payload;
 557
 558         id_payload = id_payload_create_from_ts(this->tsi);
 559         message->add_payload(message, &id_payload->payload_interface);
 560         id_payload = id_payload_create_from_ts(this->tsr);
 561         message->add_payload(message, &id_payload->payload_interface);
 562 }
 563
 564 /**
 565  * Get traffic selectors from received message
 566  */
 567 static bool get_ts(private_quick_mode_t *this, message_t *message)
 568 {
 569         traffic_selector_t *tsi = NULL, *tsr = NULL;
 570         enumerator_t *enumerator;
 571         id_payload_t *id_payload;
 572         payload_t *payload;
 573         host_t *hsi, *hsr;
 574         bool first = TRUE;
 575
 576         enumerator = message->create_payload_enumerator(message);
 577         while (enumerator->enumerate(enumerator, &payload))
 578         {
 579                 if (payload->get_type(payload) == PLV1_ID)
 580                 {
 581                         id_payload = (id_payload_t*)payload;
 582
 583                         if (first)
 584                         {
 585                                 tsi = id_payload->get_ts(id_payload);
 586                                 first = FALSE;
 587                         }
 588                         else
 589                         {
 590                                 tsr = id_payload->get_ts(id_payload);
 591                                 break;
 592                         }
 593                 }
 594         }
 595         enumerator->destroy(enumerator);
 596
 597         /* create host2host selectors if ID payloads missing */
 598         if (this->initiator)
 599         {
 600                 hsi = this->ike_sa->get_my_host(this->ike_sa);
 601                 hsr = this->ike_sa->get_other_host(this->ike_sa);
 602         }
 603         else
 604         {
 605                 hsr = this->ike_sa->get_my_host(this->ike_sa);
 606                 hsi = this->ike_sa->get_other_host(this->ike_sa);
 607         }
 608         if (!tsi)
 609         {
 610                 tsi = traffic_selector_create_from_subnet(hsi->clone(hsi),
 611                                         hsi->get_family(hsi) == AF_INET ? 32 : 128, 0, 0, 65535);
 612         }
 613         if (!tsr)
 614         {
 615                 tsr = traffic_selector_create_from_subnet(hsr->clone(hsr),
 616                                         hsr->get_family(hsr) == AF_INET ? 32 : 128, 0, 0, 65535);
 617         }
 618         if (this->mode == MODE_TRANSPORT && this->udp &&
 619            (!tsi->is_host(tsi, hsi) || !tsr->is_host(tsr, hsr)))
 620         {       /* change TS in case of a NAT in transport mode */
 621                 DBG2(DBG_IKE, "changing received traffic selectors %R=== %R due to NAT",
 622                          tsi, tsr);
 623                 tsi->set_address(tsi, hsi);
 624                 tsr->set_address(tsr, hsr);
 625         }
 626
 627         if (this->initiator)
 628         {
 629                 traffic_selector_t *tsisub, *tsrsub;
 630
 631                 /* check if peer selection is valid */
 632                 tsisub = this->tsi->get_subset(this->tsi, tsi);
 633                 tsrsub = this->tsr->get_subset(this->tsr, tsr);
 634                 if (!tsisub || !tsrsub)
 635                 {
 636                         DBG1(DBG_IKE, "peer selected invalid traffic selectors: "
 637                                  "%R for %R, %R for %R", tsi, this->tsi, tsr, this->tsr);
 638                         DESTROY_IF(tsisub);
 639                         DESTROY_IF(tsrsub);
 640                         tsi->destroy(tsi);
 641                         tsr->destroy(tsr);
 642                         return FALSE;
 643                 }
 644                 tsi->destroy(tsi);
 645                 tsr->destroy(tsr);
 646                 this->tsi->destroy(this->tsi);
 647                 this->tsr->destroy(this->tsr);
 648                 this->tsi = tsisub;
 649                 this->tsr = tsrsub;
 650         }
 651         else
 652         {
 653                 this->tsi = tsi;
 654                 this->tsr = tsr;
 655         }
 656         return TRUE;
 657 }
 658
 659 /**
 660  * Get encap
 661  */
 662 static encap_t get_encap(ike_sa_t* ike_sa, bool udp)
 663 {
 664         if (!udp)
 665         {
 666                 return ENCAP_NONE;
 667         }
 668         if (ike_sa->supports_extension(ike_sa, EXT_NATT_DRAFT_02_03))
 669         {
 670                 return ENCAP_UDP_DRAFT_00_03;
 671         }
 672         return ENCAP_UDP;
 673 }
 674
 675 /**
 676  * Get NAT-OA payload type (RFC 3947 or RFC 3947 drafts).
 677  */
 678 static payload_type_t get_nat_oa_payload_type(ike_sa_t *ike_sa)
 679 {
 680         if (ike_sa->supports_extension(ike_sa, EXT_NATT_DRAFT_02_03))
 681         {
 682                 return PLV1_NAT_OA_DRAFT_00_03;
 683         }
 684         return PLV1_NAT_OA;
 685 }
 686
 687 /**
 688  * Add NAT-OA payloads
 689  */
 690 static void add_nat_oa_payloads(private_quick_mode_t *this, message_t *message)
 691 {
 692         identification_t *id;
 693         id_payload_t *nat_oa;
 694         host_t *src, *dst;
 695         payload_type_t nat_oa_payload_type;
 696
 697         src = message->get_source(message);
 698         dst = message->get_destination(message);
 699
 700         src = this->initiator ? src : dst;
 701         dst = this->initiator ? dst : src;
 702
 703         nat_oa_payload_type = get_nat_oa_payload_type(this->ike_sa);
 704
 705         /* first NAT-OA is the initiator's address */
 706         id = identification_create_from_sockaddr(src->get_sockaddr(src));
 707         nat_oa = id_payload_create_from_identification(nat_oa_payload_type, id);
 708         message->add_payload(message, (payload_t*)nat_oa);
 709         id->destroy(id);
 710
 711         /* second NAT-OA is that of the responder */
 712         id = identification_create_from_sockaddr(dst->get_sockaddr(dst));
 713         nat_oa = id_payload_create_from_identification(nat_oa_payload_type, id);
 714         message->add_payload(message, (payload_t*)nat_oa);
 715         id->destroy(id);
 716 }
 717
 718 /**
 719  * Look up lifetimes
 720  */
 721 static void get_lifetimes(private_quick_mode_t *this)
 722 {
 723         lifetime_cfg_t *lft;
 724
 725         lft = this->config->get_lifetime(this->config, TRUE);
 726         if (lft->time.life)
 727         {
 728                 this->lifetime = lft->time.life;
 729         }
 730         if (lft->bytes.life)
 731         {
 732                 this->lifebytes = lft->bytes.life;
 733         }
 734         free(lft);
 735 }
 736
 737 /**
 738  * Check and apply lifetimes
 739  */
 740 static void apply_lifetimes(private_quick_mode_t *this, sa_payload_t *sa_payload)
 741 {
 742         uint32_t lifetime;
 743         uint64_t lifebytes;
 744
 745         lifetime = sa_payload->get_lifetime(sa_payload);
 746         lifebytes = sa_payload->get_lifebytes(sa_payload);
 747         if (this->lifetime != lifetime)
 748         {
 749                 DBG1(DBG_IKE, "received %us lifetime, configured %us",
 750                          lifetime, this->lifetime);
 751                 this->lifetime = lifetime;
 752         }
 753         if (this->lifebytes != lifebytes)
 754         {
 755                 DBG1(DBG_IKE, "received %llu lifebytes, configured %llu",
 756                          lifebytes, this->lifebytes);
 757                 this->lifebytes = lifebytes;
 758         }
 759 }
 760
 761 /**
 762  * Set the task ready to build notify error message
 763  */
 764 static status_t send_notify(private_quick_mode_t *this, notify_type_t type)
 765 {
 766         notify_payload_t *notify;
 767
 768         notify = notify_payload_create_from_protocol_and_type(PLV1_NOTIFY,
 769                                                                                                                   this->proto, type);
 770         notify->set_spi(notify, this->spi_i);
 771
 772         this->ike_sa->queue_task(this->ike_sa,
 773                                                 (task_t*)informational_create(this->ike_sa, notify));
 774         /* cancel all active/passive tasks in favour of informational */
 775         this->ike_sa->flush_queue(this->ike_sa,
 776                                         this->initiator ? TASK_QUEUE_ACTIVE : TASK_QUEUE_PASSIVE);
 777         return ALREADY_DONE;
 778 }
 779
 780 /**
 781  * Prepare a list of proposals from child_config containing only the specified
 782  * DH group, unless it is set to MODP_NONE.
 783  */
 784 static linked_list_t *get_proposals(private_quick_mode_t *this,
 785                                                                         diffie_hellman_group_t group)
 786 {
 787         linked_list_t *list;
 788         proposal_t *proposal;
 789         enumerator_t *enumerator;
 790
 791         list = this->config->get_proposals(this->config, FALSE);
 792         enumerator = list->create_enumerator(list);
 793         while (enumerator->enumerate(enumerator, &proposal))
 794         {
 795                 if (group != MODP_NONE)
 796                 {
 797                         if (!proposal->has_dh_group(proposal, group))
 798                         {
 799                                 list->remove_at(list, enumerator);
 800                                 proposal->destroy(proposal);
 801                                 continue;
 802                         }
 803                         proposal->strip_dh(proposal, group);
 804                 }
 805                 proposal->set_spi(proposal, this->spi_i);
 806         }
 807         enumerator->destroy(enumerator);
 808
 809         return list;
 810 }
 811
 812 METHOD(task_t, build_i, status_t,
 813         private_quick_mode_t *this, message_t *message)
 814 {
 815         switch (this->state)
 816         {
 817                 case QM_INIT:
 818                 {
 819                         sa_payload_t *sa_payload;
 820                         linked_list_t *list, *tsi, *tsr;
 821                         proposal_t *proposal;
 822                         diffie_hellman_group_t group;
 823                         encap_t encap;
 824
 825                         this->udp = this->ike_sa->has_condition(this->ike_sa, COND_NAT_ANY);
 826                         this->mode = this->config->get_mode(this->config);
 827                         this->child_sa = child_sa_create(
 828                                                                         this->ike_sa->get_my_host(this->ike_sa),
 829                                                                         this->ike_sa->get_other_host(this->ike_sa),
 830                                                                         this->config, this->reqid, this->udp,
 831                                                                         this->mark_in, this->mark_out);
 832
 833                         if (this->udp && this->mode == MODE_TRANSPORT)
 834                         {
 835                                 /* TODO-IKEv1: disable NAT-T for TRANSPORT mode by default? */
 836                                 add_nat_oa_payloads(this, message);
 837                         }
 838
 839                         if (this->config->use_ipcomp(this->config))
 840                         {
 841                                 this->cpi_i = this->child_sa->alloc_cpi(this->child_sa);
 842                                 if (!this->cpi_i)
 843                                 {
 844                                         DBG1(DBG_IKE, "unable to allocate a CPI from kernel, "
 845                                                  "IPComp disabled");
 846                                 }
 847                         }
 848
 849                         list = this->config->get_proposals(this->config, MODP_NONE);
 850                         if (list->get_first(list, (void**)&proposal) == SUCCESS)
 851                         {
 852                                 this->proto = proposal->get_protocol(proposal);
 853                         }
 854                         list->destroy_offset(list, offsetof(proposal_t, destroy));
 855                         this->spi_i = this->child_sa->alloc_spi(this->child_sa, this->proto);
 856                         if (!this->spi_i)
 857                         {
 858                                 DBG1(DBG_IKE, "allocating SPI from kernel failed");
 859                                 return FAILED;
 860                         }
 861
 862                         group = this->config->get_dh_group(this->config);
 863                         if (group != MODP_NONE)
 864                         {
 865                                 proposal_t *proposal;
 866                                 uint16_t preferred_group;
 867
 868                                 proposal = this->ike_sa->get_proposal(this->ike_sa);
 869                                 proposal->get_algorithm(proposal, DIFFIE_HELLMAN_GROUP,
 870                                                                                 &preferred_group, NULL);
 871                                 /* try the negotiated DH group from IKE_SA */
 872                                 list = get_proposals(this, preferred_group);
 873                                 if (list->get_count(list))
 874                                 {
 875                                         group = preferred_group;
 876                                 }
 877                                 else
 878                                 {
 879                                         /* fall back to the first configured DH group */
 880                                         list->destroy(list);
 881                                         list = get_proposals(this, group);
 882                                 }
 883
 884                                 this->dh = this->keymat->keymat.create_dh(&this->keymat->keymat,
 885                                                                                                                   group);
 886                                 if (!this->dh)
 887                                 {
 888                                         DBG1(DBG_IKE, "configured DH group %N not supported",
 889                                                  diffie_hellman_group_names, group);
 890                                         list->destroy_offset(list, offsetof(proposal_t, destroy));
 891                                         return FAILED;
 892                                 }
 893                         }
 894                         else
 895                         {
 896                                 list = get_proposals(this, MODP_NONE);
 897                         }
 898
 899                         get_lifetimes(this);
 900                         encap = get_encap(this->ike_sa, this->udp);
 901                         sa_payload = sa_payload_create_from_proposals_v1(list,
 902                                                                 this->lifetime, this->lifebytes, AUTH_NONE,
 903                                                                 this->mode, encap, this->cpi_i);
 904                         list->destroy_offset(list, offsetof(proposal_t, destroy));
 905                         message->add_payload(message, &sa_payload->payload_interface);
 906
 907                         if (!add_nonce(this, &this->nonce_i, message))
 908                         {
 909                                 return FAILED;
 910                         }
 911                         if (group != MODP_NONE)
 912                         {
 913                                 if (!add_ke(this, message))
 914                                 {
 915                                         return FAILED;
 916                                 }
 917                         }
 918                         if (!this->tsi)
 919                         {
 920                                 this->tsi = select_ts(this, TRUE, NULL);
 921                         }
 922                         if (!this->tsr)
 923                         {
 924                                 this->tsr = select_ts(this, FALSE, NULL);
 925                         }
 926                         tsi = linked_list_create_with_items(this->tsi, NULL);
 927                         tsr = linked_list_create_with_items(this->tsr, NULL);
 928                         this->tsi = this->tsr = NULL;
 929                         charon->bus->narrow(charon->bus, this->child_sa,
 930                                                                 NARROW_INITIATOR_PRE_AUTH, tsi, tsr);
 931                         tsi->remove_first(tsi, (void**)&this->tsi);
 932                         tsr->remove_first(tsr, (void**)&this->tsr);
 933                         tsi->destroy_offset(tsi, offsetof(traffic_selector_t, destroy));
 934                         tsr->destroy_offset(tsr, offsetof(traffic_selector_t, destroy));
 935                         if (!this->tsi || !this->tsr)
 936                         {
 937                                 return FAILED;
 938                         }
 939                         add_ts(this, message);
 940                         return NEED_MORE;
 941                 }
 942                 case QM_NEGOTIATED:
 943                 {
 944                         return SUCCESS;
 945                 }
 946                 default:
 947                         return FAILED;
 948         }
 949 }
 950
 951 /**
 952  * Check for notify errors, return TRUE if error found
 953  */
 954 static bool has_notify_errors(private_quick_mode_t *this, message_t *message)
 955 {
 956         enumerator_t *enumerator;
 957         payload_t *payload;
 958         bool err = FALSE;
 959
 960         enumerator = message->create_payload_enumerator(message);
 961         while (enumerator->enumerate(enumerator, &payload))
 962         {
 963                 if (payload->get_type(payload) == PLV1_NOTIFY)
 964                 {
 965                         notify_payload_t *notify;
 966                         notify_type_t type;
 967
 968                         notify = (notify_payload_t*)payload;
 969                         type = notify->get_notify_type(notify);
 970                         if (type < 16384)
 971                         {
 972
 973                                 DBG1(DBG_IKE, "received %N error notify",
 974                                          notify_type_names, type);
 975                                 err = TRUE;
 976                         }
 977                         else
 978                         {
 979                                 DBG1(DBG_IKE, "received %N notify", notify_type_names, type);
 980                         }
 981                 }
 982         }
 983         enumerator->destroy(enumerator);
 984
 985         return err;
 986 }
 987
 988 /**
 989  * Check if this is a rekey for an existing CHILD_SA, reuse reqid if so
 990  */
 991 static void check_for_rekeyed_child(private_quick_mode_t *this)
 992 {
 993         enumerator_t *enumerator, *policies;
 994         traffic_selector_t *local, *remote;
 995         child_sa_t *child_sa;
 996         proposal_t *proposal;
 997         char *name;
 998
 999         name = this->config->get_name(this->config);
1000         enumerator = this->ike_sa->create_child_sa_enumerator(this->ike_sa);
1001         while (this->reqid == 0 && enumerator->enumerate(enumerator, &child_sa))
1002         {
1003                 if (streq(child_sa->get_name(child_sa), name))
1004                 {
1005                         proposal = child_sa->get_proposal(child_sa);
1006                         switch (child_sa->get_state(child_sa))
1007                         {
1008                                 case CHILD_INSTALLED:
1009                                 case CHILD_REKEYING:
1010                                         policies = child_sa->create_policy_enumerator(child_sa);
1011                                         if (policies->enumerate(policies, &local, &remote) &&
1012                                                 local->equals(local, this->tsr) &&
1013                                                 remote->equals(remote, this->tsi) &&
1014                                                 this->proposal->equals(this->proposal, proposal))
1015                                         {
1016                                                 this->reqid = child_sa->get_reqid(child_sa);
1017                                                 this->rekey = child_sa->get_spi(child_sa, TRUE);
1018                                                 this->mark_in = child_sa->get_mark(child_sa,
1019                                                                                                                         TRUE).value;
1020                                                 this->mark_out = child_sa->get_mark(child_sa,
1021                                                                                                                         FALSE).value;
1022                                                 child_sa->set_state(child_sa, CHILD_REKEYING);
1023                                                 DBG1(DBG_IKE, "detected rekeying of CHILD_SA %s{%u}",
1024                                                          child_sa->get_name(child_sa),
1025                                                          child_sa->get_unique_id(child_sa));
1026                                         }
1027                                         policies->destroy(policies);
1028                                         break;
1029                                 case CHILD_REKEYED:
1030                                 default:
1031                                         break;
1032                         }
1033                 }
1034         }
1035         enumerator->destroy(enumerator);
1036 }
1037
1038 METHOD(task_t, process_r, status_t,
1039         private_quick_mode_t *this, message_t *message)
1040 {
1041         if (this->mid && this->mid != message->get_message_id(message))
1042         {       /* not responsible for this quick mode exchange */
1043                 return INVALID_ARG;
1044         }
1045
1046         switch (this->state)
1047         {
1048                 case QM_INIT:
1049                 {
1050                         sa_payload_t *sa_payload;
1051                         linked_list_t *tsi, *tsr, *hostsi, *hostsr, *list = NULL;
1052                         peer_cfg_t *peer_cfg;
1053                         uint16_t group;
1054                         bool private, prefer_configured;
1055
1056                         sa_payload = (sa_payload_t*)message->get_payload(message,
1057                                                                                                         PLV1_SECURITY_ASSOCIATION);
1058                         if (!sa_payload)
1059                         {
1060                                 DBG1(DBG_IKE, "sa payload missing");
1061                                 return send_notify(this, INVALID_PAYLOAD_TYPE);
1062                         }
1063
1064                         this->mode = sa_payload->get_encap_mode(sa_payload, &this->udp);
1065
1066                         if (!get_ts(this, message))
1067                         {
1068                                 return FAILED;
1069                         }
1070                         peer_cfg = this->ike_sa->get_peer_cfg(this->ike_sa);
1071                         tsi = linked_list_create_with_items(this->tsi, NULL);
1072                         tsr = linked_list_create_with_items(this->tsr, NULL);
1073                         this->tsi = this->tsr = NULL;
1074                         hostsi = get_dynamic_hosts(this->ike_sa, FALSE);
1075                         hostsr = get_dynamic_hosts(this->ike_sa, TRUE);
1076                         this->config = peer_cfg->select_child_cfg(peer_cfg, tsr, tsi,
1077                                                                                                           hostsr, hostsi);
1078                         hostsi->destroy(hostsi);
1079                         hostsr->destroy(hostsr);
1080                         if (this->config)
1081                         {
1082                                 this->tsi = select_ts(this, FALSE, tsi);
1083                                 this->tsr = select_ts(this, TRUE, tsr);
1084                         }
1085                         tsi->destroy_offset(tsi, offsetof(traffic_selector_t, destroy));
1086                         tsr->destroy_offset(tsr, offsetof(traffic_selector_t, destroy));
1087                         if (!this->config || !this->tsi || !this->tsr ||
1088                                 this->mode != this->config->get_mode(this->config))
1089                         {
1090                                 DBG1(DBG_IKE, "no matching CHILD_SA config found");
1091                                 return send_notify(this, INVALID_ID_INFORMATION);
1092                         }
1093
1094                         if (this->config->use_ipcomp(this->config))
1095                         {
1096                                 list = sa_payload->get_ipcomp_proposals(sa_payload,
1097                                                                                                                 &this->cpi_i);
1098                                 if (!list->get_count(list))
1099                                 {
1100                                         DBG1(DBG_IKE, "expected IPComp proposal but peer did "
1101                                                  "not send one, IPComp disabled");
1102                                         this->cpi_i = 0;
1103                                 }
1104                         }
1105                         if (!list || !list->get_count(list))
1106                         {
1107                                 DESTROY_IF(list);
1108                                 list = sa_payload->get_proposals(sa_payload);
1109                         }
1110                         private = this->ike_sa->supports_extension(this->ike_sa,
1111                                                                                                            EXT_STRONGSWAN);
1112                         prefer_configured = lib->settings->get_bool(lib->settings,
1113                                                         "%s.prefer_configured_proposals", TRUE, lib->ns);
1114                         this->proposal = this->config->select_proposal(this->config, list,
1115                                                                                         FALSE, private, prefer_configured);
1116                         list->destroy_offset(list, offsetof(proposal_t, destroy));
1117
1118                         get_lifetimes(this);
1119                         apply_lifetimes(this, sa_payload);
1120
1121                         if (!this->proposal)
1122                         {
1123                                 DBG1(DBG_IKE, "no matching proposal found, sending %N",
1124                                          notify_type_names, NO_PROPOSAL_CHOSEN);
1125                                 return send_notify(this, NO_PROPOSAL_CHOSEN);
1126                         }
1127                         this->spi_i = this->proposal->get_spi(this->proposal);
1128
1129                         if (!get_nonce(this, &this->nonce_i, message))
1130                         {
1131                                 return send_notify(this, INVALID_PAYLOAD_TYPE);
1132                         }
1133
1134                         if (this->proposal->get_algorithm(this->proposal,
1135                                                                                 DIFFIE_HELLMAN_GROUP, &group, NULL))
1136                         {
1137                                 this->dh = this->keymat->keymat.create_dh(&this->keymat->keymat,
1138                                                                                                                   group);
1139                                 if (!this->dh)
1140                                 {
1141                                         DBG1(DBG_IKE, "negotiated DH group %N not supported",
1142                                                  diffie_hellman_group_names, group);
1143                                         return send_notify(this, INVALID_KEY_INFORMATION);
1144                                 }
1145                                 if (!get_ke(this, message))
1146                                 {
1147                                         return send_notify(this, INVALID_PAYLOAD_TYPE);
1148                                 }
1149                         }
1150
1151                         check_for_rekeyed_child(this);
1152
1153                         this->child_sa = child_sa_create(
1154                                                                         this->ike_sa->get_my_host(this->ike_sa),
1155                                                                         this->ike_sa->get_other_host(this->ike_sa),
1156                                                                         this->config, this->reqid, this->udp,
1157                                                                         this->mark_in, this->mark_out);
1158
1159                         tsi = linked_list_create_with_items(this->tsi, NULL);
1160                         tsr = linked_list_create_with_items(this->tsr, NULL);
1161                         this->tsi = this->tsr = NULL;
1162                         charon->bus->narrow(charon->bus, this->child_sa,
1163                                                                 NARROW_RESPONDER, tsr, tsi);
1164                         if (tsi->remove_first(tsi, (void**)&this->tsi) != SUCCESS ||
1165                                 tsr->remove_first(tsr, (void**)&this->tsr) != SUCCESS)
1166                         {
1167                                 tsi->destroy_offset(tsi, offsetof(traffic_selector_t, destroy));
1168                                 tsr->destroy_offset(tsr, offsetof(traffic_selector_t, destroy));
1169                                 return send_notify(this, INVALID_ID_INFORMATION);
1170                         }
1171                         tsi->destroy_offset(tsi, offsetof(traffic_selector_t, destroy));
1172                         tsr->destroy_offset(tsr, offsetof(traffic_selector_t, destroy));
1173
1174                         return NEED_MORE;
1175                 }
1176                 case QM_NEGOTIATED:
1177                 {
1178                         if (has_notify_errors(this, message))
1179                         {
1180                                 return SUCCESS;
1181                         }
1182                         if (message->get_exchange_type(message) == INFORMATIONAL_V1)
1183                         {
1184                                 if (message->get_payload(message, PLV1_DELETE))
1185                                 {
1186                                         /* If the DELETE for a Quick Mode follows immediately
1187                                          * after rekeying, we might receive it before the
1188                                          * third completing Quick Mode message. Ignore it, as
1189                                          * it gets handled by a separately queued delete task. */
1190                                         return NEED_MORE;
1191                                 }
1192                                 return SUCCESS;
1193                         }
1194                         if (!install(this))
1195                         {
1196                                 ike_sa_t *ike_sa = this->ike_sa;
1197                                 task_t *task;
1198
1199                                 task = (task_t*)quick_delete_create(this->ike_sa,
1200                                                                 this->proposal->get_protocol(this->proposal),
1201                                                                 this->spi_i, TRUE, TRUE);
1202                                 /* flush_queue() destroys the current task */
1203                                 ike_sa->flush_queue(ike_sa, TASK_QUEUE_PASSIVE);
1204                                 ike_sa->queue_task(ike_sa, task);
1205                                 return ALREADY_DONE;
1206                         }
1207                         return SUCCESS;
1208                 }
1209                 default:
1210                         return FAILED;
1211         }
1212 }
1213
1214 METHOD(task_t, build_r, status_t,
1215         private_quick_mode_t *this, message_t *message)
1216 {
1217         if (this->mid && this->mid != message->get_message_id(message))
1218         {       /* not responsible for this quick mode exchange */
1219                 return INVALID_ARG;
1220         }
1221
1222         switch (this->state)
1223         {
1224                 case QM_INIT:
1225                 {
1226                         sa_payload_t *sa_payload;
1227                         encap_t encap;
1228
1229                         this->proto = this->proposal->get_protocol(this->proposal);
1230                         this->spi_r = this->child_sa->alloc_spi(this->child_sa, this->proto);
1231                         if (!this->spi_r)
1232                         {
1233                                 DBG1(DBG_IKE, "allocating SPI from kernel failed");
1234                                 return send_notify(this, NO_PROPOSAL_CHOSEN);
1235                         }
1236                         this->proposal->set_spi(this->proposal, this->spi_r);
1237
1238                         if (this->cpi_i)
1239                         {
1240                                 this->cpi_r = this->child_sa->alloc_cpi(this->child_sa);
1241                                 if (!this->cpi_r)
1242                                 {
1243                                         DBG1(DBG_IKE, "unable to allocate a CPI from "
1244                                                  "kernel, IPComp disabled");
1245                                         return send_notify(this, NO_PROPOSAL_CHOSEN);
1246                                 }
1247                         }
1248
1249                         if (this->udp && this->mode == MODE_TRANSPORT)
1250                         {
1251                                 /* TODO-IKEv1: disable NAT-T for TRANSPORT mode by default? */
1252                                 add_nat_oa_payloads(this, message);
1253                         }
1254
1255                         encap = get_encap(this->ike_sa, this->udp);
1256                         sa_payload = sa_payload_create_from_proposal_v1(this->proposal,
1257                                                                 this->lifetime, this->lifebytes, AUTH_NONE,
1258                                                                 this->mode, encap, this->cpi_r);
1259                         message->add_payload(message, &sa_payload->payload_interface);
1260
1261                         if (!add_nonce(this, &this->nonce_r, message))
1262                         {
1263                                 return FAILED;
1264                         }
1265                         if (this->dh)
1266                         {
1267                                 if (!add_ke(this, message))
1268                                 {
1269                                         return FAILED;
1270                                 }
1271                         }
1272
1273                         add_ts(this, message);
1274
1275                         this->state = QM_NEGOTIATED;
1276                         this->mid = message->get_message_id(message);
1277                         return NEED_MORE;
1278                 }
1279                 case QM_NEGOTIATED:
1280                         if (message->get_exchange_type(message) == INFORMATIONAL_V1)
1281                         {
1282                                 /* skip INFORMATIONAL response if we received a INFORMATIONAL
1283                                  * delete, see process_r() */
1284                                 return ALREADY_DONE;
1285                         }
1286                         /* fall */
1287                 default:
1288                         return FAILED;
1289         }
1290 }
1291
1292 METHOD(task_t, process_i, status_t,
1293         private_quick_mode_t *this, message_t *message)
1294 {
1295         switch (this->state)
1296         {
1297                 case QM_INIT:
1298                 {
1299                         sa_payload_t *sa_payload;
1300                         linked_list_t *list = NULL;
1301                         bool private;
1302
1303                         sa_payload = (sa_payload_t*)message->get_payload(message,
1304                                                                                                         PLV1_SECURITY_ASSOCIATION);
1305                         if (!sa_payload)
1306                         {
1307                                 DBG1(DBG_IKE, "sa payload missing");
1308                                 return send_notify(this, NO_PROPOSAL_CHOSEN);
1309                         }
1310                         if (this->cpi_i)
1311                         {
1312                                 list = sa_payload->get_ipcomp_proposals(sa_payload,
1313                                                                                                                 &this->cpi_r);
1314                                 if (!list->get_count(list))
1315                                 {
1316                                         DBG1(DBG_IKE, "peer did not acccept our IPComp proposal, "
1317                                                  "IPComp disabled");
1318                                         this->cpi_i = 0;
1319                                 }
1320                         }
1321                         if (!list || !list->get_count(list))
1322                         {
1323                                 DESTROY_IF(list);
1324                                 list = sa_payload->get_proposals(sa_payload);
1325                         }
1326                         private = this->ike_sa->supports_extension(this->ike_sa,
1327                                                                                                            EXT_STRONGSWAN);
1328                         this->proposal = this->config->select_proposal(this->config, list,
1329                                                                                                                 FALSE, private, TRUE);
1330                         list->destroy_offset(list, offsetof(proposal_t, destroy));
1331                         if (!this->proposal)
1332                         {
1333                                 DBG1(DBG_IKE, "no matching proposal found");
1334                                 return send_notify(this, NO_PROPOSAL_CHOSEN);
1335                         }
1336                         this->spi_r = this->proposal->get_spi(this->proposal);
1337
1338                         apply_lifetimes(this, sa_payload);
1339
1340                         if (!get_nonce(this, &this->nonce_r, message))
1341                         {
1342                                 return send_notify(this, INVALID_PAYLOAD_TYPE);
1343                         }
1344                         if (this->dh && !get_ke(this, message))
1345                         {
1346                                 return send_notify(this, INVALID_KEY_INFORMATION);
1347                         }
1348                         if (!get_ts(this, message))
1349                         {
1350                                 return send_notify(this, INVALID_PAYLOAD_TYPE);
1351                         }
1352                         if (!install(this))
1353                         {
1354                                 return send_notify(this, NO_PROPOSAL_CHOSEN);
1355                         }
1356                         this->state = QM_NEGOTIATED;
1357                         return NEED_MORE;
1358                 }
1359                 default:
1360                         return FAILED;
1361         }
1362 }
1363
1364 METHOD(task_t, get_type, task_type_t,
1365         private_quick_mode_t *this)
1366 {
1367         return TASK_QUICK_MODE;
1368 }
1369
1370 METHOD(quick_mode_t, get_mid, uint32_t,
1371         private_quick_mode_t *this)
1372 {
1373         return this->mid;
1374 }
1375
1376 METHOD(quick_mode_t, use_reqid, void,
1377         private_quick_mode_t *this, uint32_t reqid)
1378 {
1379         this->reqid = reqid;
1380 }
1381
1382 METHOD(quick_mode_t, use_marks, void,
1383         private_quick_mode_t *this, u_int in, u_int out)
1384 {
1385         this->mark_in = in;
1386         this->mark_out = out;
1387 }
1388
1389 METHOD(quick_mode_t, rekey, void,
1390         private_quick_mode_t *this, uint32_t spi)
1391 {
1392         this->rekey = spi;
1393 }
1394
1395 METHOD(task_t, migrate, void,
1396         private_quick_mode_t *this, ike_sa_t *ike_sa)
1397 {
1398         chunk_free(&this->nonce_i);
1399         chunk_free(&this->nonce_r);
1400         DESTROY_IF(this->tsi);
1401         DESTROY_IF(this->tsr);
1402         DESTROY_IF(this->proposal);
1403         DESTROY_IF(this->child_sa);
1404         DESTROY_IF(this->dh);
1405
1406         this->ike_sa = ike_sa;
1407         this->keymat = (keymat_v1_t*)ike_sa->get_keymat(ike_sa);
1408         this->state = QM_INIT;
1409         this->mid = 0;
1410         this->tsi = NULL;
1411         this->tsr = NULL;
1412         this->proposal = NULL;
1413         this->child_sa = NULL;
1414         this->dh = NULL;
1415         this->spi_i = 0;
1416         this->spi_r = 0;
1417         this->mark_in = 0;
1418         this->mark_out = 0;
1419
1420         if (!this->initiator)
1421         {
1422                 DESTROY_IF(this->config);
1423                 this->config = NULL;
1424         }
1425 }
1426
1427 METHOD(task_t, destroy, void,
1428         private_quick_mode_t *this)
1429 {
1430         chunk_free(&this->nonce_i);
1431         chunk_free(&this->nonce_r);
1432         DESTROY_IF(this->tsi);
1433         DESTROY_IF(this->tsr);
1434         DESTROY_IF(this->proposal);
1435         DESTROY_IF(this->child_sa);
1436         DESTROY_IF(this->config);
1437         DESTROY_IF(this->dh);
1438         free(this);
1439 }
1440
1441 /*
1442  * Described in header.
1443  */
1444 quick_mode_t *quick_mode_create(ike_sa_t *ike_sa, child_cfg_t *config,
1445                                                         traffic_selector_t *tsi, traffic_selector_t *tsr)
1446 {
1447         private_quick_mode_t *this;
1448
1449         INIT(this,
1450                 .public = {
1451                         .task = {
1452                                 .get_type = _get_type,
1453                                 .migrate = _migrate,
1454                                 .destroy = _destroy,
1455                         },
1456                         .get_mid = _get_mid,
1457                         .use_reqid = _use_reqid,
1458                         .use_marks = _use_marks,
1459                         .rekey = _rekey,
1460                 },
1461                 .ike_sa = ike_sa,
1462                 .initiator = config != NULL,
1463                 .config = config,
1464                 .keymat = (keymat_v1_t*)ike_sa->get_keymat(ike_sa),
1465                 .state = QM_INIT,
1466                 .tsi = tsi ? tsi->clone(tsi) : NULL,
1467                 .tsr = tsr ? tsr->clone(tsr) : NULL,
1468                 .proto = PROTO_ESP,
1469                 .delete = lib->settings->get_bool(lib->settings,
1470                                                                                   "%s.delete_rekeyed", FALSE, lib->ns),
1471         );
1472
1473         if (config)
1474         {
1475                 this->public.task.build = _build_i;
1476                 this->public.task.process = _process_i;
1477         }
1478         else
1479         {
1480                 this->public.task.build = _build_r;
1481                 this->public.task.process = _process_r;
1482         }
1483
1484         return &this->public;
1485 }