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

   1 /*
   2  * Copyright (C) 2012 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         u_int32_t spi_i;
 102
 103         /**
 104          * Responder ESP SPI
 105          */
 106         u_int32_t spi_r;
 107
 108         /**
 109          * Initiators IPComp CPI
 110          */
 111         u_int16_t cpi_i;
 112
 113         /**
 114          * Responders IPComp CPI
 115          */
 116         u_int16_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         u_int32_t lifetime;
 147
 148         /**
 149          * Negotaited lifebytes of new SA
 150          */
 151         u_int64_t lifebytes;
 152
 153         /**
 154          * Reqid to use, 0 for auto-allocate
 155          */
 156         u_int32_t reqid;
 157
 158         /**
 159          * SPI of SA we rekey
 160          */
 161         u_int32_t rekey;
 162
 163         /**
 164          * Negotiated mode, tunnel or transport
 165          */
 166         ipsec_mode_t mode;
 167
 168         /**
 169          * Use UDP encapsulation
 170          */
 171         bool udp;
 172
 173         /** states of quick mode */
 174         enum {
 175                 QM_INIT,
 176                 QM_NEGOTIATED,
 177         } state;
 178 };
 179
 180 /**
 181  * Schedule inactivity timeout for CHILD_SA with reqid, if enabled
 182  */
 183 static void schedule_inactivity_timeout(private_quick_mode_t *this)
 184 {
 185         u_int32_t timeout;
 186         bool close_ike;
 187
 188         timeout = this->config->get_inactivity(this->config);
 189         if (timeout)
 190         {
 191                 close_ike = lib->settings->get_bool(lib->settings,
 192                                                                 "%s.inactivity_close_ike", FALSE, charon->name);
 193                 lib->scheduler->schedule_job(lib->scheduler, (job_t*)
 194                                 inactivity_job_create(this->child_sa->get_reqid(this->child_sa),
 195                                                                           timeout, close_ike), timeout);
 196         }
 197 }
 198
 199 /**
 200  * Check if we have a an address pool configured
 201  */
 202 static bool have_pool(ike_sa_t *ike_sa)
 203 {
 204         enumerator_t *enumerator;
 205         peer_cfg_t *peer_cfg;
 206         char *pool;
 207         bool found = FALSE;
 208
 209         peer_cfg = ike_sa->get_peer_cfg(ike_sa);
 210         if (peer_cfg)
 211         {
 212                 enumerator = peer_cfg->create_pool_enumerator(peer_cfg);
 213                 if (enumerator->enumerate(enumerator, &pool))
 214                 {
 215                         found = TRUE;
 216                 }
 217                 enumerator->destroy(enumerator);
 218         }
 219         return found;
 220 }
 221
 222 /**
 223  * Get hosts to use for dynamic traffic selectors
 224  */
 225 static linked_list_t *get_dynamic_hosts(ike_sa_t *ike_sa, bool local)
 226 {
 227         enumerator_t *enumerator;
 228         linked_list_t *list;
 229         host_t *host;
 230
 231         list = linked_list_create();
 232         enumerator = ike_sa->create_virtual_ip_enumerator(ike_sa, local);
 233         while (enumerator->enumerate(enumerator, &host))
 234         {
 235                 list->insert_last(list, host);
 236         }
 237         enumerator->destroy(enumerator);
 238
 239         if (list->get_count(list) == 0)
 240         {       /* no virtual IPs assigned */
 241                 if (local)
 242                 {
 243                         host = ike_sa->get_my_host(ike_sa);
 244                         list->insert_last(list, host);
 245                 }
 246                 else if (!have_pool(ike_sa))
 247                 {       /* use host only if we don't have a pool configured */
 248                         host = ike_sa->get_other_host(ike_sa);
 249                         list->insert_last(list, host);
 250                 }
 251         }
 252         return list;
 253 }
 254
 255 /**
 256  * Install negotiated CHILD_SA
 257  */
 258 static bool install(private_quick_mode_t *this)
 259 {
 260         status_t status, status_i, status_o;
 261         chunk_t encr_i, encr_r, integ_i, integ_r;
 262         linked_list_t *tsi, *tsr;
 263         child_sa_t *old = NULL;
 264
 265         this->child_sa->set_proposal(this->child_sa, this->proposal);
 266         this->child_sa->set_state(this->child_sa, CHILD_INSTALLING);
 267         this->child_sa->set_mode(this->child_sa, this->mode);
 268
 269         if (this->cpi_i && this->cpi_r)
 270         {       /* DEFLATE is the only transform we currently support */
 271                 this->child_sa->set_ipcomp(this->child_sa, IPCOMP_DEFLATE);
 272         }
 273         else
 274         {
 275                 this->cpi_i = this->cpi_r = 0;
 276         }
 277
 278         this->child_sa->set_protocol(this->child_sa,
 279                                                                  this->proposal->get_protocol(this->proposal));
 280
 281         status_i = status_o = FAILED;
 282         encr_i = encr_r = integ_i = integ_r = chunk_empty;
 283         tsi = linked_list_create_with_items(this->tsi->clone(this->tsi), NULL);
 284         tsr = linked_list_create_with_items(this->tsr->clone(this->tsr), NULL);
 285         if (this->initiator)
 286         {
 287                 charon->bus->narrow(charon->bus, this->child_sa,
 288                                                         NARROW_INITIATOR_POST_AUTH, tsi, tsr);
 289         }
 290         else
 291         {
 292                 charon->bus->narrow(charon->bus, this->child_sa,
 293                                                         NARROW_RESPONDER_POST, tsr, tsi);
 294         }
 295         if (tsi->get_count(tsi) == 0 || tsr->get_count(tsr) == 0)
 296         {
 297                 tsi->destroy_offset(tsi, offsetof(traffic_selector_t, destroy));
 298                 tsr->destroy_offset(tsr, offsetof(traffic_selector_t, destroy));
 299                 DBG1(DBG_IKE, "no acceptable traffic selectors found");
 300                 return FALSE;
 301         }
 302
 303         if (this->keymat->derive_child_keys(this->keymat, this->proposal, this->dh,
 304                                                 this->spi_i, this->spi_r, this->nonce_i, this->nonce_r,
 305                                                 &encr_i, &integ_i, &encr_r, &integ_r))
 306         {
 307                 if (this->initiator)
 308                 {
 309                         status_i = this->child_sa->install(this->child_sa, encr_r, integ_r,
 310                                                         this->spi_i, this->cpi_i, TRUE, FALSE, tsi, tsr);
 311                         status_o = this->child_sa->install(this->child_sa, encr_i, integ_i,
 312                                                         this->spi_r, this->cpi_r, FALSE, FALSE, tsi, tsr);
 313                 }
 314                 else
 315                 {
 316                         status_i = this->child_sa->install(this->child_sa, encr_i, integ_i,
 317                                                         this->spi_r, this->cpi_r, TRUE, FALSE, tsr, tsi);
 318                         status_o = this->child_sa->install(this->child_sa, encr_r, integ_r,
 319                                                         this->spi_i, this->cpi_i, FALSE, FALSE, tsr, tsi);
 320                 }
 321         }
 322         chunk_clear(&integ_i);
 323         chunk_clear(&integ_r);
 324         chunk_clear(&encr_i);
 325         chunk_clear(&encr_r);
 326
 327         if (status_i != SUCCESS || status_o != SUCCESS)
 328         {
 329                 DBG1(DBG_IKE, "unable to install %s%s%sIPsec SA (SAD) in kernel",
 330                         (status_i != SUCCESS) ? "inbound " : "",
 331                         (status_i != SUCCESS && status_o != SUCCESS) ? "and ": "",
 332                         (status_o != SUCCESS) ? "outbound " : "");
 333                 tsi->destroy_offset(tsi, offsetof(traffic_selector_t, destroy));
 334                 tsr->destroy_offset(tsr, offsetof(traffic_selector_t, destroy));
 335                 return FALSE;
 336         }
 337
 338         if (this->initiator)
 339         {
 340                 status = this->child_sa->add_policies(this->child_sa, tsi, tsr);
 341         }
 342         else
 343         {
 344                 status = this->child_sa->add_policies(this->child_sa, tsr, tsi);
 345         }
 346         tsi->destroy_offset(tsi, offsetof(traffic_selector_t, destroy));
 347         tsr->destroy_offset(tsr, offsetof(traffic_selector_t, destroy));
 348         if (status != SUCCESS)
 349         {
 350                 DBG1(DBG_IKE, "unable to install IPsec policies (SPD) in kernel");
 351                 return FALSE;
 352         }
 353
 354         charon->bus->child_keys(charon->bus, this->child_sa, this->initiator,
 355                                                         this->dh, this->nonce_i, this->nonce_r);
 356
 357         /* add to IKE_SA, and remove from task */
 358         this->child_sa->set_state(this->child_sa, CHILD_INSTALLED);
 359         this->ike_sa->add_child_sa(this->ike_sa, this->child_sa);
 360
 361         DBG0(DBG_IKE, "CHILD_SA %s{%d} established "
 362                  "with SPIs %.8x_i %.8x_o and TS %#R=== %#R",
 363                  this->child_sa->get_name(this->child_sa),
 364                  this->child_sa->get_reqid(this->child_sa),
 365                  ntohl(this->child_sa->get_spi(this->child_sa, TRUE)),
 366                  ntohl(this->child_sa->get_spi(this->child_sa, FALSE)),
 367                  this->child_sa->get_traffic_selectors(this->child_sa, TRUE),
 368                  this->child_sa->get_traffic_selectors(this->child_sa, FALSE));
 369
 370         if (this->rekey)
 371         {
 372                 old = this->ike_sa->get_child_sa(this->ike_sa,
 373                                                                 this->proposal->get_protocol(this->proposal),
 374                                                                 this->rekey, TRUE);
 375         }
 376         if (old)
 377         {
 378                 charon->bus->child_rekey(charon->bus, old, this->child_sa);
 379         }
 380         else
 381         {
 382                 charon->bus->child_updown(charon->bus, this->child_sa, TRUE);
 383         }
 384         if (!this->rekey)
 385         {
 386                 schedule_inactivity_timeout(this);
 387         }
 388         this->child_sa = NULL;
 389         return TRUE;
 390 }
 391
 392 /**
 393  * Generate and add NONCE
 394  */
 395 static bool add_nonce(private_quick_mode_t *this, chunk_t *nonce,
 396                                           message_t *message)
 397 {
 398         nonce_payload_t *nonce_payload;
 399         nonce_gen_t *nonceg;
 400
 401         nonceg = this->keymat->keymat.create_nonce_gen(&this->keymat->keymat);
 402         if (!nonceg)
 403         {
 404                 DBG1(DBG_IKE, "no nonce generator found to create nonce");
 405                 return FALSE;
 406         }
 407         if (!nonceg->allocate_nonce(nonceg, NONCE_SIZE, nonce))
 408         {
 409                 DBG1(DBG_IKE, "nonce allocation failed");
 410                 nonceg->destroy(nonceg);
 411                 return FALSE;
 412         }
 413         nonceg->destroy(nonceg);
 414
 415         nonce_payload = nonce_payload_create(NONCE_V1);
 416         nonce_payload->set_nonce(nonce_payload, *nonce);
 417         message->add_payload(message, &nonce_payload->payload_interface);
 418
 419         return TRUE;
 420 }
 421
 422 /**
 423  * Extract nonce from NONCE payload
 424  */
 425 static bool get_nonce(private_quick_mode_t *this, chunk_t *nonce,
 426                                           message_t *message)
 427 {
 428         nonce_payload_t *nonce_payload;
 429
 430         nonce_payload = (nonce_payload_t*)message->get_payload(message, NONCE_V1);
 431         if (!nonce_payload)
 432         {
 433                 DBG1(DBG_IKE, "NONCE payload missing in message");
 434                 return FALSE;
 435         }
 436         *nonce = nonce_payload->get_nonce(nonce_payload);
 437
 438         return TRUE;
 439 }
 440
 441 /**
 442  * Add KE payload to message
 443  */
 444 static void add_ke(private_quick_mode_t *this, message_t *message)
 445 {
 446         ke_payload_t *ke_payload;
 447
 448         ke_payload = ke_payload_create_from_diffie_hellman(KEY_EXCHANGE_V1, this->dh);
 449         message->add_payload(message, &ke_payload->payload_interface);
 450 }
 451
 452 /**
 453  * Get DH value from a KE payload
 454  */
 455 static bool get_ke(private_quick_mode_t *this, message_t *message)
 456 {
 457         ke_payload_t *ke_payload;
 458
 459         ke_payload = (ke_payload_t*)message->get_payload(message, KEY_EXCHANGE_V1);
 460         if (!ke_payload)
 461         {
 462                 DBG1(DBG_IKE, "KE payload missing");
 463                 return FALSE;
 464         }
 465         this->dh->set_other_public_value(this->dh,
 466                                                                 ke_payload->get_key_exchange_data(ke_payload));
 467         return TRUE;
 468 }
 469
 470 /**
 471  * Select a traffic selector from configuration
 472  */
 473 static traffic_selector_t* select_ts(private_quick_mode_t *this, bool local,
 474                                                                          linked_list_t *supplied)
 475 {
 476         traffic_selector_t *ts;
 477         linked_list_t *list, *hosts;
 478
 479         hosts = get_dynamic_hosts(this->ike_sa, local);
 480         list = this->config->get_traffic_selectors(this->config,
 481                                                                                            local, supplied, hosts);
 482         hosts->destroy(hosts);
 483         if (list->get_first(list, (void**)&ts) == SUCCESS)
 484         {
 485                 ts = ts->clone(ts);
 486         }
 487         else
 488         {
 489                 DBG1(DBG_IKE, "%s traffic selector missing in configuration",
 490                          local ? "local" : "local");
 491                 ts = NULL;
 492         }
 493         list->destroy_offset(list, offsetof(traffic_selector_t, destroy));
 494         return ts;
 495 }
 496
 497 /**
 498  * Add selected traffic selectors to message
 499  */
 500 static void add_ts(private_quick_mode_t *this, message_t *message)
 501 {
 502         id_payload_t *id_payload;
 503         host_t *hsi, *hsr;
 504
 505         if (this->initiator)
 506         {
 507                 hsi = this->ike_sa->get_my_host(this->ike_sa);
 508                 hsr = this->ike_sa->get_other_host(this->ike_sa);
 509         }
 510         else
 511         {
 512                 hsr = this->ike_sa->get_my_host(this->ike_sa);
 513                 hsi = this->ike_sa->get_other_host(this->ike_sa);
 514         }
 515         /* add ID payload only if negotiating non host2host tunnels */
 516         if (!this->tsi->is_host(this->tsi, hsi) ||
 517                 !this->tsr->is_host(this->tsr, hsr) ||
 518                 this->tsi->get_protocol(this->tsi) ||
 519                 this->tsr->get_protocol(this->tsr) ||
 520                 this->tsi->get_from_port(this->tsi) ||
 521                 this->tsr->get_from_port(this->tsr) ||
 522                 this->tsi->get_to_port(this->tsi) != 65535 ||
 523                 this->tsr->get_to_port(this->tsr) != 65535)
 524         {
 525                 id_payload = id_payload_create_from_ts(this->tsi);
 526                 message->add_payload(message, &id_payload->payload_interface);
 527                 id_payload = id_payload_create_from_ts(this->tsr);
 528                 message->add_payload(message, &id_payload->payload_interface);
 529         }
 530 }
 531
 532 /**
 533  * Get traffic selectors from received message
 534  */
 535 static bool get_ts(private_quick_mode_t *this, message_t *message)
 536 {
 537         traffic_selector_t *tsi = NULL, *tsr = NULL;
 538         enumerator_t *enumerator;
 539         id_payload_t *id_payload;
 540         payload_t *payload;
 541         host_t *hsi, *hsr;
 542         bool first = TRUE;
 543
 544         enumerator = message->create_payload_enumerator(message);
 545         while (enumerator->enumerate(enumerator, &payload))
 546         {
 547                 if (payload->get_type(payload) == ID_V1)
 548                 {
 549                         id_payload = (id_payload_t*)payload;
 550
 551                         if (first)
 552                         {
 553                                 tsi = id_payload->get_ts(id_payload);
 554                                 first = FALSE;
 555                         }
 556                         else
 557                         {
 558                                 tsr = id_payload->get_ts(id_payload);
 559                                 break;
 560                         }
 561                 }
 562         }
 563         enumerator->destroy(enumerator);
 564
 565         /* create host2host selectors if ID payloads missing */
 566         if (this->initiator)
 567         {
 568                 hsi = this->ike_sa->get_my_host(this->ike_sa);
 569                 hsr = this->ike_sa->get_other_host(this->ike_sa);
 570         }
 571         else
 572         {
 573                 hsr = this->ike_sa->get_my_host(this->ike_sa);
 574                 hsi = this->ike_sa->get_other_host(this->ike_sa);
 575         }
 576         if (!tsi)
 577         {
 578                 tsi = traffic_selector_create_from_subnet(hsi->clone(hsi),
 579                                         hsi->get_family(hsi) == AF_INET ? 32 : 128, 0, 0, 65535);
 580         }
 581         if (!tsr)
 582         {
 583                 tsr = traffic_selector_create_from_subnet(hsr->clone(hsr),
 584                                         hsr->get_family(hsr) == AF_INET ? 32 : 128, 0, 0, 65535);
 585         }
 586         if (this->mode == MODE_TRANSPORT && this->udp &&
 587            (!tsi->is_host(tsi, hsi) || !tsr->is_host(tsr, hsr)))
 588         {       /* change TS in case of a NAT in transport mode */
 589                 DBG2(DBG_IKE, "changing received traffic selectors %R=== %R due to NAT",
 590                          tsi, tsr);
 591                 tsi->set_address(tsi, hsi);
 592                 tsr->set_address(tsr, hsr);
 593         }
 594
 595         if (this->initiator)
 596         {
 597                 traffic_selector_t *tsisub, *tsrsub;
 598
 599                 /* check if peer selection is valid */
 600                 tsisub = this->tsi->get_subset(this->tsi, tsi);
 601                 tsrsub = this->tsr->get_subset(this->tsr, tsr);
 602                 if (!tsisub || !tsrsub)
 603                 {
 604                         DBG1(DBG_IKE, "peer selected invalid traffic selectors: "
 605                                  "%R for %R, %R for %R", tsi, this->tsi, tsr, this->tsr);
 606                         DESTROY_IF(tsisub);
 607                         DESTROY_IF(tsrsub);
 608                         tsi->destroy(tsi);
 609                         tsr->destroy(tsr);
 610                         return FALSE;
 611                 }
 612                 tsi->destroy(tsi);
 613                 tsr->destroy(tsr);
 614                 this->tsi->destroy(this->tsi);
 615                 this->tsr->destroy(this->tsr);
 616                 this->tsi = tsisub;
 617                 this->tsr = tsrsub;
 618         }
 619         else
 620         {
 621                 this->tsi = tsi;
 622                 this->tsr = tsr;
 623         }
 624         return TRUE;
 625 }
 626
 627 /**
 628  * Get encap
 629  */
 630 static encap_t get_encap(ike_sa_t* ike_sa, bool udp)
 631 {
 632         if (!udp)
 633         {
 634                 return ENCAP_NONE;
 635         }
 636         if (ike_sa->supports_extension(ike_sa, EXT_NATT_DRAFT_02_03))
 637         {
 638                 return ENCAP_UDP_DRAFT_00_03;
 639         }
 640         return ENCAP_UDP;
 641 }
 642
 643 /**
 644  * Get NAT-OA payload type (RFC 3947 or RFC 3947 drafts).
 645  */
 646 static payload_type_t get_nat_oa_payload_type(ike_sa_t *ike_sa)
 647 {
 648         if (ike_sa->supports_extension(ike_sa, EXT_NATT_DRAFT_02_03))
 649         {
 650                 return NAT_OA_DRAFT_00_03_V1;
 651         }
 652         return NAT_OA_V1;
 653 }
 654
 655 /**
 656  * Add NAT-OA payloads
 657  */
 658 static void add_nat_oa_payloads(private_quick_mode_t *this, message_t *message)
 659 {
 660         identification_t *id;
 661         id_payload_t *nat_oa;
 662         host_t *src, *dst;
 663         payload_type_t nat_oa_payload_type;
 664
 665         src = message->get_source(message);
 666         dst = message->get_destination(message);
 667
 668         src = this->initiator ? src : dst;
 669         dst = this->initiator ? dst : src;
 670
 671         nat_oa_payload_type = get_nat_oa_payload_type(this->ike_sa);
 672
 673         /* first NAT-OA is the initiator's address */
 674         id = identification_create_from_sockaddr(src->get_sockaddr(src));
 675         nat_oa = id_payload_create_from_identification(nat_oa_payload_type, id);
 676         message->add_payload(message, (payload_t*)nat_oa);
 677         id->destroy(id);
 678
 679         /* second NAT-OA is that of the responder */
 680         id = identification_create_from_sockaddr(dst->get_sockaddr(dst));
 681         nat_oa = id_payload_create_from_identification(nat_oa_payload_type, id);
 682         message->add_payload(message, (payload_t*)nat_oa);
 683         id->destroy(id);
 684 }
 685
 686 /**
 687  * Look up lifetimes
 688  */
 689 static void get_lifetimes(private_quick_mode_t *this)
 690 {
 691         lifetime_cfg_t *lft;
 692
 693         lft = this->config->get_lifetime(this->config);
 694         if (lft->time.life)
 695         {
 696                 this->lifetime = lft->time.life;
 697         }
 698         else if (lft->bytes.life)
 699         {
 700                 this->lifebytes = lft->bytes.life;
 701         }
 702         free(lft);
 703 }
 704
 705 /**
 706  * Check and apply lifetimes
 707  */
 708 static void apply_lifetimes(private_quick_mode_t *this, sa_payload_t *sa_payload)
 709 {
 710         u_int32_t lifetime;
 711         u_int64_t lifebytes;
 712
 713         lifetime = sa_payload->get_lifetime(sa_payload);
 714         lifebytes = sa_payload->get_lifebytes(sa_payload);
 715         if (this->lifetime != lifetime)
 716         {
 717                 DBG1(DBG_IKE, "received %us lifetime, configured %us",
 718                          lifetime, this->lifetime);
 719                 this->lifetime = lifetime;
 720         }
 721         if (this->lifebytes != lifebytes)
 722         {
 723                 DBG1(DBG_IKE, "received %llu lifebytes, configured %llu",
 724                          lifebytes, this->lifebytes);
 725                 this->lifebytes = lifebytes;
 726         }
 727 }
 728
 729 /**
 730  * Set the task ready to build notify error message
 731  */
 732 static status_t send_notify(private_quick_mode_t *this, notify_type_t type)
 733 {
 734         notify_payload_t *notify;
 735
 736         notify = notify_payload_create_from_protocol_and_type(NOTIFY_V1,
 737                                                                                                                   PROTO_ESP, type);
 738         notify->set_spi(notify, this->spi_i);
 739
 740         this->ike_sa->queue_task(this->ike_sa,
 741                                                 (task_t*)informational_create(this->ike_sa, notify));
 742         /* cancel all active/passive tasks in favour of informational */
 743         this->ike_sa->flush_queue(this->ike_sa,
 744                                         this->initiator ? TASK_QUEUE_ACTIVE : TASK_QUEUE_PASSIVE);
 745         return ALREADY_DONE;
 746 }
 747
 748 METHOD(task_t, build_i, status_t,
 749         private_quick_mode_t *this, message_t *message)
 750 {
 751         switch (this->state)
 752         {
 753                 case QM_INIT:
 754                 {
 755                         enumerator_t *enumerator;
 756                         sa_payload_t *sa_payload;
 757                         linked_list_t *list, *tsi, *tsr;
 758                         proposal_t *proposal;
 759                         diffie_hellman_group_t group;
 760                         encap_t encap;
 761
 762                         this->udp = this->ike_sa->has_condition(this->ike_sa, COND_NAT_ANY);
 763                         this->mode = this->config->get_mode(this->config);
 764                         this->child_sa = child_sa_create(
 765                                                                         this->ike_sa->get_my_host(this->ike_sa),
 766                                                                         this->ike_sa->get_other_host(this->ike_sa),
 767                                                                         this->config, this->reqid, this->udp);
 768
 769                         if (this->udp && this->mode == MODE_TRANSPORT)
 770                         {
 771                                 /* TODO-IKEv1: disable NAT-T for TRANSPORT mode by default? */
 772                                 add_nat_oa_payloads(this, message);
 773                         }
 774
 775                         if (this->config->use_ipcomp(this->config))
 776                         {
 777                                 if (this->udp)
 778                                 {
 779                                         DBG1(DBG_IKE, "IPComp is not supported if either peer is "
 780                                                  "natted, IPComp disabled");
 781                                 }
 782                                 else
 783                                 {
 784                                         this->cpi_i = this->child_sa->alloc_cpi(this->child_sa);
 785                                         if (!this->cpi_i)
 786                                         {
 787                                                 DBG1(DBG_IKE, "unable to allocate a CPI from kernel, "
 788                                                          "IPComp disabled");
 789                                         }
 790                                 }
 791                         }
 792
 793                         this->spi_i = this->child_sa->alloc_spi(this->child_sa, PROTO_ESP);
 794                         if (!this->spi_i)
 795                         {
 796                                 DBG1(DBG_IKE, "allocating SPI from kernel failed");
 797                                 return FAILED;
 798                         }
 799                         group = this->config->get_dh_group(this->config);
 800                         if (group != MODP_NONE)
 801                         {
 802                                 this->dh = this->keymat->keymat.create_dh(&this->keymat->keymat,
 803                                                                                                                   group);
 804                                 if (!this->dh)
 805                                 {
 806                                         DBG1(DBG_IKE, "configured DH group %N not supported",
 807                                                  diffie_hellman_group_names, group);
 808                                         return FAILED;
 809                                 }
 810                         }
 811
 812                         list = this->config->get_proposals(this->config, FALSE);
 813                         enumerator = list->create_enumerator(list);
 814                         while (enumerator->enumerate(enumerator, &proposal))
 815                         {
 816                                 if (group != MODP_NONE)
 817                                 {
 818                                         if (!proposal->has_dh_group(proposal, group))
 819                                         {
 820                                                 list->remove_at(list, enumerator);
 821                                                 proposal->destroy(proposal);
 822                                                 continue;
 823                                         }
 824                                         proposal->strip_dh(proposal, group);
 825                                 }
 826                                 proposal->set_spi(proposal, this->spi_i);
 827                         }
 828                         enumerator->destroy(enumerator);
 829
 830                         get_lifetimes(this);
 831                         encap = get_encap(this->ike_sa, this->udp);
 832                         sa_payload = sa_payload_create_from_proposals_v1(list,
 833                                                                 this->lifetime, this->lifebytes, AUTH_NONE,
 834                                                                 this->mode, encap, this->cpi_i);
 835                         list->destroy_offset(list, offsetof(proposal_t, destroy));
 836                         message->add_payload(message, &sa_payload->payload_interface);
 837
 838                         if (!add_nonce(this, &this->nonce_i, message))
 839                         {
 840                                 return FAILED;
 841                         }
 842                         if (group != MODP_NONE)
 843                         {
 844                                 add_ke(this, message);
 845                         }
 846                         if (!this->tsi)
 847                         {
 848                                 this->tsi = select_ts(this, TRUE, NULL);
 849                         }
 850                         if (!this->tsr)
 851                         {
 852                                 this->tsr = select_ts(this, FALSE, NULL);
 853                         }
 854                         tsi = linked_list_create_with_items(this->tsi, NULL);
 855                         tsr = linked_list_create_with_items(this->tsr, NULL);
 856                         this->tsi = this->tsr = NULL;
 857                         charon->bus->narrow(charon->bus, this->child_sa,
 858                                                                 NARROW_INITIATOR_PRE_AUTH, tsi, tsr);
 859                         tsi->remove_first(tsi, (void**)&this->tsi);
 860                         tsr->remove_first(tsr, (void**)&this->tsr);
 861                         tsi->destroy_offset(tsi, offsetof(traffic_selector_t, destroy));
 862                         tsr->destroy_offset(tsr, offsetof(traffic_selector_t, destroy));
 863                         if (!this->tsi || !this->tsr)
 864                         {
 865                                 return FAILED;
 866                         }
 867                         add_ts(this, message);
 868                         return NEED_MORE;
 869                 }
 870                 case QM_NEGOTIATED:
 871                 {
 872                         return SUCCESS;
 873                 }
 874                 default:
 875                         return FAILED;
 876         }
 877 }
 878
 879 /**
 880  * Check for notify errors, return TRUE if error found
 881  */
 882 static bool has_notify_errors(private_quick_mode_t *this, message_t *message)
 883 {
 884         enumerator_t *enumerator;
 885         payload_t *payload;
 886         bool err = FALSE;
 887
 888         enumerator = message->create_payload_enumerator(message);
 889         while (enumerator->enumerate(enumerator, &payload))
 890         {
 891                 if (payload->get_type(payload) == NOTIFY_V1)
 892                 {
 893                         notify_payload_t *notify;
 894                         notify_type_t type;
 895
 896                         notify = (notify_payload_t*)payload;
 897                         type = notify->get_notify_type(notify);
 898                         if (type < 16384)
 899                         {
 900
 901                                 DBG1(DBG_IKE, "received %N error notify",
 902                                          notify_type_names, type);
 903                                 err = TRUE;
 904                         }
 905                         else
 906                         {
 907                                 DBG1(DBG_IKE, "received %N notify", notify_type_names, type);
 908                         }
 909                 }
 910         }
 911         enumerator->destroy(enumerator);
 912
 913         return err;
 914 }
 915
 916 /**
 917  * Check if this is a rekey for an existing CHILD_SA, reuse reqid if so
 918  */
 919 static void check_for_rekeyed_child(private_quick_mode_t *this)
 920 {
 921         enumerator_t *enumerator, *policies;
 922         traffic_selector_t *local, *remote;
 923         child_sa_t *child_sa;
 924
 925         enumerator = this->ike_sa->create_child_sa_enumerator(this->ike_sa);
 926         while (this->reqid == 0 && enumerator->enumerate(enumerator, &child_sa))
 927         {
 928                 if (child_sa->get_state(child_sa) == CHILD_INSTALLED &&
 929                         streq(child_sa->get_name(child_sa),
 930                                   this->config->get_name(this->config)))
 931                 {
 932                         policies = child_sa->create_policy_enumerator(child_sa);
 933                         if (policies->enumerate(policies, &local, &remote))
 934                         {
 935                                 if (local->equals(local, this->tsr) &&
 936                                         remote->equals(remote, this->tsi) &&
 937                                         this->proposal->equals(this->proposal,
 938                                                                                    child_sa->get_proposal(child_sa)))
 939                                 {
 940                                         this->reqid = child_sa->get_reqid(child_sa);
 941                                         this->rekey = child_sa->get_spi(child_sa, TRUE);
 942                                         child_sa->set_state(child_sa, CHILD_REKEYING);
 943                                         DBG1(DBG_IKE, "detected rekeying of CHILD_SA %s{%u}",
 944                                                  child_sa->get_name(child_sa), this->reqid);
 945                                 }
 946                         }
 947                         policies->destroy(policies);
 948                 }
 949         }
 950         enumerator->destroy(enumerator);
 951 }
 952
 953 METHOD(task_t, process_r, status_t,
 954         private_quick_mode_t *this, message_t *message)
 955 {
 956         switch (this->state)
 957         {
 958                 case QM_INIT:
 959                 {
 960                         sa_payload_t *sa_payload;
 961                         linked_list_t *tsi, *tsr, *hostsi, *hostsr, *list = NULL;
 962                         peer_cfg_t *peer_cfg;
 963                         u_int16_t group;
 964                         bool private;
 965
 966                         sa_payload = (sa_payload_t*)message->get_payload(message,
 967                                                                                                         SECURITY_ASSOCIATION_V1);
 968                         if (!sa_payload)
 969                         {
 970                                 DBG1(DBG_IKE, "sa payload missing");
 971                                 return send_notify(this, INVALID_PAYLOAD_TYPE);
 972                         }
 973
 974                         this->mode = sa_payload->get_encap_mode(sa_payload, &this->udp);
 975
 976                         if (!get_ts(this, message))
 977                         {
 978                                 return FAILED;
 979                         }
 980                         peer_cfg = this->ike_sa->get_peer_cfg(this->ike_sa);
 981                         tsi = linked_list_create_with_items(this->tsi, NULL);
 982                         tsr = linked_list_create_with_items(this->tsr, NULL);
 983                         this->tsi = this->tsr = NULL;
 984                         hostsi = get_dynamic_hosts(this->ike_sa, FALSE);
 985                         hostsr = get_dynamic_hosts(this->ike_sa, TRUE);
 986                         this->config = peer_cfg->select_child_cfg(peer_cfg, tsr, tsi,
 987                                                                                                           hostsr, hostsi);
 988                         hostsi->destroy(hostsi);
 989                         hostsr->destroy(hostsr);
 990                         if (this->config)
 991                         {
 992                                 this->tsi = select_ts(this, FALSE, tsi);
 993                                 this->tsr = select_ts(this, TRUE, tsr);
 994                         }
 995                         tsi->destroy_offset(tsi, offsetof(traffic_selector_t, destroy));
 996                         tsr->destroy_offset(tsr, offsetof(traffic_selector_t, destroy));
 997                         if (!this->config || !this->tsi || !this->tsr)
 998                         {
 999                                 DBG1(DBG_IKE, "no matching CHILD_SA config found");
1000                                 return send_notify(this, INVALID_ID_INFORMATION);
1001                         }
1002
1003                         if (this->config->use_ipcomp(this->config))
1004                         {
1005                                 if (this->ike_sa->has_condition(this->ike_sa, COND_NAT_ANY))
1006                                 {
1007                                         DBG1(DBG_IKE, "IPComp is not supported if either peer is "
1008                                                  "natted, IPComp disabled");
1009                                 }
1010                                 else
1011                                 {
1012                                         list = sa_payload->get_ipcomp_proposals(sa_payload,
1013                                                                                                                         &this->cpi_i);
1014                                         if (!list->get_count(list))
1015                                         {
1016                                                 DBG1(DBG_IKE, "expected IPComp proposal but peer did "
1017                                                          "not send one, IPComp disabled");
1018                                                 this->cpi_i = 0;
1019                                         }
1020                                 }
1021                         }
1022                         if (!list || !list->get_count(list))
1023                         {
1024                                 DESTROY_IF(list);
1025                                 list = sa_payload->get_proposals(sa_payload);
1026                         }
1027                         private = this->ike_sa->supports_extension(this->ike_sa,
1028                                                                                                            EXT_STRONGSWAN);
1029                         this->proposal = this->config->select_proposal(this->config,
1030                                                                                                                    list, FALSE, private);
1031                         list->destroy_offset(list, offsetof(proposal_t, destroy));
1032
1033                         get_lifetimes(this);
1034                         apply_lifetimes(this, sa_payload);
1035
1036                         if (!this->proposal)
1037                         {
1038                                 DBG1(DBG_IKE, "no matching proposal found, sending %N",
1039                                          notify_type_names, NO_PROPOSAL_CHOSEN);
1040                                 return send_notify(this, NO_PROPOSAL_CHOSEN);
1041                         }
1042                         this->spi_i = this->proposal->get_spi(this->proposal);
1043
1044                         if (!get_nonce(this, &this->nonce_i, message))
1045                         {
1046                                 return send_notify(this, INVALID_PAYLOAD_TYPE);
1047                         }
1048
1049                         if (this->proposal->get_algorithm(this->proposal,
1050                                                                                 DIFFIE_HELLMAN_GROUP, &group, NULL))
1051                         {
1052                                 this->dh = this->keymat->keymat.create_dh(&this->keymat->keymat,
1053                                                                                                                   group);
1054                                 if (!this->dh)
1055                                 {
1056                                         DBG1(DBG_IKE, "negotiated DH group %N not supported",
1057                                                  diffie_hellman_group_names, group);
1058                                         return send_notify(this, INVALID_KEY_INFORMATION);
1059                                 }
1060                                 if (!get_ke(this, message))
1061                                 {
1062                                         return send_notify(this, INVALID_PAYLOAD_TYPE);
1063                                 }
1064                         }
1065
1066                         check_for_rekeyed_child(this);
1067
1068                         this->child_sa = child_sa_create(
1069                                                                         this->ike_sa->get_my_host(this->ike_sa),
1070                                                                         this->ike_sa->get_other_host(this->ike_sa),
1071                                                                         this->config, this->reqid, this->udp);
1072
1073                         tsi = linked_list_create_with_items(this->tsi, NULL);
1074                         tsr = linked_list_create_with_items(this->tsr, NULL);
1075                         this->tsi = this->tsr = NULL;
1076                         charon->bus->narrow(charon->bus, this->child_sa,
1077                                                                 NARROW_RESPONDER, tsr, tsi);
1078                         if (tsi->remove_first(tsi, (void**)&this->tsi) != SUCCESS ||
1079                                 tsr->remove_first(tsr, (void**)&this->tsr) != SUCCESS)
1080                         {
1081                                 tsi->destroy_offset(tsi, offsetof(traffic_selector_t, destroy));
1082                                 tsr->destroy_offset(tsr, offsetof(traffic_selector_t, destroy));
1083                                 return send_notify(this, INVALID_ID_INFORMATION);
1084                         }
1085                         tsi->destroy_offset(tsi, offsetof(traffic_selector_t, destroy));
1086                         tsr->destroy_offset(tsr, offsetof(traffic_selector_t, destroy));
1087
1088                         return NEED_MORE;
1089                 }
1090                 case QM_NEGOTIATED:
1091                 {
1092                         if (message->get_exchange_type(message) == INFORMATIONAL_V1 ||
1093                                 has_notify_errors(this, message))
1094                         {
1095                                 return SUCCESS;
1096                         }
1097                         if (!install(this))
1098                         {
1099                                 ike_sa_t *ike_sa = this->ike_sa;
1100                                 task_t *task;
1101
1102                                 task = (task_t*)quick_delete_create(this->ike_sa,
1103                                                                 this->proposal->get_protocol(this->proposal),
1104                                                                 this->spi_i, TRUE, TRUE);
1105                                 /* flush_queue() destroys the current task */
1106                                 ike_sa->flush_queue(ike_sa, TASK_QUEUE_PASSIVE);
1107                                 ike_sa->queue_task(ike_sa, task);
1108                                 return ALREADY_DONE;
1109                         }
1110                         return SUCCESS;
1111                 }
1112                 default:
1113                         return FAILED;
1114         }
1115 }
1116
1117 METHOD(task_t, build_r, status_t,
1118         private_quick_mode_t *this, message_t *message)
1119 {
1120         switch (this->state)
1121         {
1122                 case QM_INIT:
1123                 {
1124                         sa_payload_t *sa_payload;
1125                         encap_t encap;
1126
1127                         this->spi_r = this->child_sa->alloc_spi(this->child_sa, PROTO_ESP);
1128                         if (!this->spi_r)
1129                         {
1130                                 DBG1(DBG_IKE, "allocating SPI from kernel failed");
1131                                 return send_notify(this, NO_PROPOSAL_CHOSEN);
1132                         }
1133                         this->proposal->set_spi(this->proposal, this->spi_r);
1134
1135                         if (this->cpi_i)
1136                         {
1137                                 this->cpi_r = this->child_sa->alloc_cpi(this->child_sa);
1138                                 if (!this->cpi_r)
1139                                 {
1140                                         DBG1(DBG_IKE, "unable to allocate a CPI from "
1141                                                  "kernel, IPComp disabled");
1142                                         return send_notify(this, NO_PROPOSAL_CHOSEN);
1143                                 }
1144                         }
1145
1146                         if (this->udp && this->mode == MODE_TRANSPORT)
1147                         {
1148                                 /* TODO-IKEv1: disable NAT-T for TRANSPORT mode by default? */
1149                                 add_nat_oa_payloads(this, message);
1150                         }
1151
1152                         encap = get_encap(this->ike_sa, this->udp);
1153                         sa_payload = sa_payload_create_from_proposal_v1(this->proposal,
1154                                                                 this->lifetime, this->lifebytes, AUTH_NONE,
1155                                                                 this->mode, encap, this->cpi_r);
1156                         message->add_payload(message, &sa_payload->payload_interface);
1157
1158                         if (!add_nonce(this, &this->nonce_r, message))
1159                         {
1160                                 return FAILED;
1161                         }
1162                         if (this->dh)
1163                         {
1164                                 add_ke(this, message);
1165                         }
1166
1167                         add_ts(this, message);
1168
1169                         this->state = QM_NEGOTIATED;
1170                         return NEED_MORE;
1171                 }
1172                 default:
1173                         return FAILED;
1174         }
1175 }
1176
1177 METHOD(task_t, process_i, status_t,
1178         private_quick_mode_t *this, message_t *message)
1179 {
1180         switch (this->state)
1181         {
1182                 case QM_INIT:
1183                 {
1184                         sa_payload_t *sa_payload;
1185                         linked_list_t *list = NULL;
1186                         bool private;
1187
1188                         sa_payload = (sa_payload_t*)message->get_payload(message,
1189                                                                                                         SECURITY_ASSOCIATION_V1);
1190                         if (!sa_payload)
1191                         {
1192                                 DBG1(DBG_IKE, "sa payload missing");
1193                                 return send_notify(this, NO_PROPOSAL_CHOSEN);
1194                         }
1195                         if (this->cpi_i)
1196                         {
1197                                 list = sa_payload->get_ipcomp_proposals(sa_payload,
1198                                                                                                                 &this->cpi_r);
1199                                 if (!list->get_count(list))
1200                                 {
1201                                         DBG1(DBG_IKE, "peer did not acccept our IPComp proposal, "
1202                                                  "IPComp disabled");
1203                                         this->cpi_i = 0;
1204                                 }
1205                         }
1206                         if (!list || !list->get_count(list))
1207                         {
1208                                 DESTROY_IF(list);
1209                                 list = sa_payload->get_proposals(sa_payload);
1210                         }
1211                         private = this->ike_sa->supports_extension(this->ike_sa,
1212                                                                                                            EXT_STRONGSWAN);
1213                         this->proposal = this->config->select_proposal(this->config,
1214                                                                                                                    list, FALSE, private);
1215                         list->destroy_offset(list, offsetof(proposal_t, destroy));
1216                         if (!this->proposal)
1217                         {
1218                                 DBG1(DBG_IKE, "no matching proposal found");
1219                                 return send_notify(this, NO_PROPOSAL_CHOSEN);
1220                         }
1221                         this->spi_r = this->proposal->get_spi(this->proposal);
1222
1223                         apply_lifetimes(this, sa_payload);
1224
1225                         if (!get_nonce(this, &this->nonce_r, message))
1226                         {
1227                                 return send_notify(this, INVALID_PAYLOAD_TYPE);
1228                         }
1229                         if (this->dh && !get_ke(this, message))
1230                         {
1231                                 return send_notify(this, INVALID_KEY_INFORMATION);
1232                         }
1233                         if (!get_ts(this, message))
1234                         {
1235                                 return send_notify(this, INVALID_PAYLOAD_TYPE);
1236                         }
1237                         if (!install(this))
1238                         {
1239                                 return send_notify(this, NO_PROPOSAL_CHOSEN);
1240                         }
1241                         this->state = QM_NEGOTIATED;
1242                         return NEED_MORE;
1243                 }
1244                 default:
1245                         return FAILED;
1246         }
1247 }
1248
1249 METHOD(task_t, get_type, task_type_t,
1250         private_quick_mode_t *this)
1251 {
1252         return TASK_QUICK_MODE;
1253 }
1254
1255 METHOD(quick_mode_t, use_reqid, void,
1256         private_quick_mode_t *this, u_int32_t reqid)
1257 {
1258         this->reqid = reqid;
1259 }
1260
1261 METHOD(quick_mode_t, rekey, void,
1262         private_quick_mode_t *this, u_int32_t spi)
1263 {
1264         this->rekey = spi;
1265 }
1266
1267 METHOD(task_t, migrate, void,
1268         private_quick_mode_t *this, ike_sa_t *ike_sa)
1269 {
1270         chunk_free(&this->nonce_i);
1271         chunk_free(&this->nonce_r);
1272         DESTROY_IF(this->tsi);
1273         DESTROY_IF(this->tsr);
1274         DESTROY_IF(this->proposal);
1275         DESTROY_IF(this->child_sa);
1276         DESTROY_IF(this->dh);
1277
1278         this->ike_sa = ike_sa;
1279         this->keymat = (keymat_v1_t*)ike_sa->get_keymat(ike_sa);
1280         this->state = QM_INIT;
1281         this->tsi = NULL;
1282         this->tsr = NULL;
1283         this->proposal = NULL;
1284         this->child_sa = NULL;
1285         this->dh = NULL;
1286         this->spi_i = 0;
1287         this->spi_r = 0;
1288
1289         if (!this->initiator)
1290         {
1291                 DESTROY_IF(this->config);
1292                 this->config = NULL;
1293         }
1294 }
1295
1296 METHOD(task_t, destroy, void,
1297         private_quick_mode_t *this)
1298 {
1299         chunk_free(&this->nonce_i);
1300         chunk_free(&this->nonce_r);
1301         DESTROY_IF(this->tsi);
1302         DESTROY_IF(this->tsr);
1303         DESTROY_IF(this->proposal);
1304         DESTROY_IF(this->child_sa);
1305         DESTROY_IF(this->config);
1306         DESTROY_IF(this->dh);
1307         free(this);
1308 }
1309
1310 /*
1311  * Described in header.
1312  */
1313 quick_mode_t *quick_mode_create(ike_sa_t *ike_sa, child_cfg_t *config,
1314                                                         traffic_selector_t *tsi, traffic_selector_t *tsr)
1315 {
1316         private_quick_mode_t *this;
1317
1318         INIT(this,
1319                 .public = {
1320                         .task = {
1321                                 .get_type = _get_type,
1322                                 .migrate = _migrate,
1323                                 .destroy = _destroy,
1324                         },
1325                         .use_reqid = _use_reqid,
1326                         .rekey = _rekey,
1327                 },
1328                 .ike_sa = ike_sa,
1329                 .initiator = config != NULL,
1330                 .config = config,
1331                 .keymat = (keymat_v1_t*)ike_sa->get_keymat(ike_sa),
1332                 .state = QM_INIT,
1333                 .tsi = tsi ? tsi->clone(tsi) : NULL,
1334                 .tsr = tsr ? tsr->clone(tsr) : NULL,
1335         );
1336
1337         if (config)
1338         {
1339                 this->public.task.build = _build_i;
1340                 this->public.task.process = _process_i;
1341         }
1342         else
1343         {
1344                 this->public.task.build = _build_r;
1345                 this->public.task.process = _process_r;
1346         }
1347
1348         return &this->public;
1349 }