src/libcharon/sa/ike_sa.c

   1 /*
   2  * Copyright (C) 2006-2012 Tobias Brunner
   3  * Copyright (C) 2006 Daniel Roethlisberger
   4  * Copyright (C) 2005-2009 Martin Willi
   5  * Copyright (C) 2005 Jan Hutter
   6  * Hochschule fuer Technik Rapperswil
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by the
  10  * Free Software Foundation; either version 2 of the License, or (at your
  11  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  15  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16  * for more details.
  17  */
  18
  19 #include <string.h>
  20 #include <sys/stat.h>
  21 #include <errno.h>
  22 #include <time.h>
  23
  24 #include "ike_sa.h"
  25
  26 #include <library.h>
  27 #include <hydra.h>
  28 #include <daemon.h>
  29 #include <utils/linked_list.h>
  30 #include <utils/lexparser.h>
  31 #include <processing/jobs/retransmit_job.h>
  32 #include <processing/jobs/delete_ike_sa_job.h>
  33 #include <processing/jobs/send_dpd_job.h>
  34 #include <processing/jobs/send_keepalive_job.h>
  35 #include <processing/jobs/rekey_ike_sa_job.h>
  36 #include <processing/jobs/retry_initiate_job.h>
  37 #include <sa/ikev2/tasks/ike_auth_lifetime.h>
  38
  39 #ifdef ME
  40 #include <sa/ikev2/tasks/ike_me.h>
  41 #include <processing/jobs/initiate_mediation_job.h>
  42 #endif
  43
  44 ENUM(ike_sa_state_names, IKE_CREATED, IKE_DESTROYING,
  45         "CREATED",
  46         "CONNECTING",
  47         "ESTABLISHED",
  48         "PASSIVE",
  49         "REKEYING",
  50         "DELETING",
  51         "DESTROYING",
  52 );
  53
  54 typedef struct private_ike_sa_t private_ike_sa_t;
  55 typedef struct attribute_entry_t attribute_entry_t;
  56
  57 /**
  58  * Private data of an ike_sa_t object.
  59  */
  60 struct private_ike_sa_t {
  61
  62         /**
  63          * Public members
  64          */
  65         ike_sa_t public;
  66
  67         /**
  68          * Identifier for the current IKE_SA.
  69          */
  70         ike_sa_id_t *ike_sa_id;
  71
  72         /**
  73          * IKE version of this SA.
  74          */
  75         ike_version_t version;
  76
  77         /**
  78          * unique numerical ID for this IKE_SA.
  79          */
  80         u_int32_t unique_id;
  81
  82         /**
  83          * Current state of the IKE_SA
  84          */
  85         ike_sa_state_t state;
  86
  87         /**
  88          * IKE configuration used to set up this IKE_SA
  89          */
  90         ike_cfg_t *ike_cfg;
  91
  92         /**
  93          * Peer and authentication information to establish IKE_SA.
  94          */
  95         peer_cfg_t *peer_cfg;
  96
  97         /**
  98          * currently used authentication ruleset, local (as auth_cfg_t)
  99          */
 100         auth_cfg_t *my_auth;
 101
 102         /**
 103          * list of completed local authentication rounds
 104          */
 105         linked_list_t *my_auths;
 106
 107         /**
 108          * list of completed remote authentication rounds
 109          */
 110         linked_list_t *other_auths;
 111
 112         /**
 113          * currently used authentication constraints, remote (as auth_cfg_t)
 114          */
 115         auth_cfg_t *other_auth;
 116
 117         /**
 118          * Selected IKE proposal
 119          */
 120         proposal_t *proposal;
 121
 122         /**
 123          * Juggles tasks to process messages
 124          */
 125         task_manager_t *task_manager;
 126
 127         /**
 128          * Address of local host
 129          */
 130         host_t *my_host;
 131
 132         /**
 133          * Address of remote host
 134          */
 135         host_t *other_host;
 136
 137 #ifdef ME
 138         /**
 139          * Are we mediation server
 140          */
 141         bool is_mediation_server;
 142
 143         /**
 144          * Server reflexive host
 145          */
 146         host_t *server_reflexive_host;
 147
 148         /**
 149          * Connect ID
 150          */
 151         chunk_t connect_id;
 152 #endif /* ME */
 153
 154         /**
 155          * Identification used for us
 156          */
 157         identification_t *my_id;
 158
 159         /**
 160          * Identification used for other
 161          */
 162         identification_t *other_id;
 163
 164         /**
 165          * set of extensions the peer supports
 166          */
 167         ike_extension_t extensions;
 168
 169         /**
 170          * set of condition flags currently enabled for this IKE_SA
 171          */
 172         ike_condition_t conditions;
 173
 174         /**
 175          * Linked List containing the child sa's of the current IKE_SA.
 176          */
 177         linked_list_t *child_sas;
 178
 179         /**
 180          * keymat of this IKE_SA
 181          */
 182         keymat_t *keymat;
 183
 184         /**
 185          * Virtual IPs on local host
 186          */
 187         linked_list_t *my_vips;
 188
 189         /**
 190          * Virtual IPs on remote host
 191          */
 192         linked_list_t *other_vips;
 193
 194         /**
 195          * List of configuration attributes (attribute_entry_t)
 196          */
 197         linked_list_t *attributes;
 198
 199         /**
 200          * list of peer's addresses, additional ones transmitted via MOBIKE
 201          */
 202         linked_list_t *peer_addresses;
 203
 204         /**
 205          * previously value of received DESTINATION_IP hash
 206          */
 207         chunk_t nat_detection_dest;
 208
 209         /**
 210          * number pending UPDATE_SA_ADDRESS (MOBIKE)
 211          */
 212         u_int32_t pending_updates;
 213
 214         /**
 215          * NAT keep alive interval
 216          */
 217         u_int32_t keepalive_interval;
 218
 219         /**
 220          * interval for retries during initiation (e.g. if DNS resolution failed),
 221          * 0 to disable (default)
 222          */
 223         u_int32_t retry_initiate_interval;
 224
 225         /**
 226          * TRUE if a retry_initiate_job has been queued
 227          */
 228         bool retry_initiate_queued;
 229
 230         /**
 231          * Timestamps for this IKE_SA
 232          */
 233         u_int32_t stats[STAT_MAX];
 234
 235         /**
 236          * how many times we have retried so far (keyingtries)
 237          */
 238         u_int32_t keyingtry;
 239
 240         /**
 241          * local host address to be used for IKE, set via MIGRATE kernel message
 242          */
 243         host_t *local_host;
 244
 245         /**
 246          * remote host address to be used for IKE, set via MIGRATE kernel message
 247          */
 248         host_t *remote_host;
 249
 250         /**
 251          * Flush auth configs once established?
 252          */
 253         bool flush_auth_cfg;
 254 };
 255
 256 /**
 257  * Entry to maintain install configuration attributes during IKE_SA lifetime
 258  */
 259 struct attribute_entry_t {
 260         /** handler used to install this attribute */
 261         attribute_handler_t *handler;
 262         /** attribute type */
 263         configuration_attribute_type_t type;
 264         /** attribute data */
 265         chunk_t data;
 266 };
 267
 268 /**
 269  * get the time of the latest traffic processed by the kernel
 270  */
 271 static time_t get_use_time(private_ike_sa_t* this, bool inbound)
 272 {
 273         enumerator_t *enumerator;
 274         child_sa_t *child_sa;
 275         time_t use_time, current;
 276
 277         if (inbound)
 278         {
 279                 use_time = this->stats[STAT_INBOUND];
 280         }
 281         else
 282         {
 283                 use_time = this->stats[STAT_OUTBOUND];
 284         }
 285         enumerator = this->child_sas->create_enumerator(this->child_sas);
 286         while (enumerator->enumerate(enumerator, &child_sa))
 287         {
 288                 child_sa->get_usestats(child_sa, inbound, &current, NULL);
 289                 use_time = max(use_time, current);
 290         }
 291         enumerator->destroy(enumerator);
 292
 293         return use_time;
 294 }
 295
 296 METHOD(ike_sa_t, get_unique_id, u_int32_t,
 297         private_ike_sa_t *this)
 298 {
 299         return this->unique_id;
 300 }
 301
 302 METHOD(ike_sa_t, get_name, char*,
 303         private_ike_sa_t *this)
 304 {
 305         if (this->peer_cfg)
 306         {
 307                 return this->peer_cfg->get_name(this->peer_cfg);
 308         }
 309         return "(unnamed)";
 310 }
 311
 312 METHOD(ike_sa_t, get_statistic, u_int32_t,
 313         private_ike_sa_t *this, statistic_t kind)
 314 {
 315         if (kind < STAT_MAX)
 316         {
 317                 return this->stats[kind];
 318         }
 319         return 0;
 320 }
 321
 322 METHOD(ike_sa_t, set_statistic, void,
 323         private_ike_sa_t *this, statistic_t kind, u_int32_t value)
 324 {
 325         if (kind < STAT_MAX)
 326         {
 327                 this->stats[kind] = value;
 328         }
 329 }
 330
 331 METHOD(ike_sa_t, get_my_host, host_t*,
 332         private_ike_sa_t *this)
 333 {
 334         return this->my_host;
 335 }
 336
 337 METHOD(ike_sa_t, set_my_host, void,
 338         private_ike_sa_t *this, host_t *me)
 339 {
 340         DESTROY_IF(this->my_host);
 341         this->my_host = me;
 342 }
 343
 344 METHOD(ike_sa_t, get_other_host, host_t*,
 345         private_ike_sa_t *this)
 346 {
 347         return this->other_host;
 348 }
 349
 350 METHOD(ike_sa_t, set_other_host, void,
 351         private_ike_sa_t *this, host_t *other)
 352 {
 353         DESTROY_IF(this->other_host);
 354         this->other_host = other;
 355 }
 356
 357 METHOD(ike_sa_t, get_peer_cfg, peer_cfg_t*,
 358         private_ike_sa_t *this)
 359 {
 360         return this->peer_cfg;
 361 }
 362
 363 METHOD(ike_sa_t, set_peer_cfg, void,
 364         private_ike_sa_t *this, peer_cfg_t *peer_cfg)
 365 {
 366         peer_cfg->get_ref(peer_cfg);
 367         DESTROY_IF(this->peer_cfg);
 368         this->peer_cfg = peer_cfg;
 369
 370         if (this->ike_cfg == NULL)
 371         {
 372                 this->ike_cfg = peer_cfg->get_ike_cfg(peer_cfg);
 373                 this->ike_cfg->get_ref(this->ike_cfg);
 374         }
 375 }
 376
 377 METHOD(ike_sa_t, get_auth_cfg, auth_cfg_t*,
 378         private_ike_sa_t *this, bool local)
 379 {
 380         if (local)
 381         {
 382                 return this->my_auth;
 383         }
 384         return this->other_auth;
 385 }
 386
 387 METHOD(ike_sa_t, add_auth_cfg, void,
 388         private_ike_sa_t *this, bool local, auth_cfg_t *cfg)
 389 {
 390         if (local)
 391         {
 392                 this->my_auths->insert_last(this->my_auths, cfg);
 393         }
 394         else
 395         {
 396                 this->other_auths->insert_last(this->other_auths, cfg);
 397         }
 398 }
 399
 400 METHOD(ike_sa_t, create_auth_cfg_enumerator, enumerator_t*,
 401         private_ike_sa_t *this, bool local)
 402 {
 403         if (local)
 404         {
 405                 return this->my_auths->create_enumerator(this->my_auths);
 406         }
 407         return this->other_auths->create_enumerator(this->other_auths);
 408 }
 409
 410 /**
 411  * Flush the stored authentication round information
 412  */
 413 static void flush_auth_cfgs(private_ike_sa_t *this)
 414 {
 415         auth_cfg_t *cfg;
 416
 417         this->my_auth->purge(this->my_auth, FALSE);
 418         this->other_auth->purge(this->other_auth, FALSE);
 419
 420         while (this->my_auths->remove_last(this->my_auths,
 421                                                                            (void**)&cfg) == SUCCESS)
 422         {
 423                 cfg->destroy(cfg);
 424         }
 425         while (this->other_auths->remove_last(this->other_auths,
 426                                                                                   (void**)&cfg) == SUCCESS)
 427         {
 428                 cfg->destroy(cfg);
 429         }
 430 }
 431
 432 METHOD(ike_sa_t, get_proposal, proposal_t*,
 433         private_ike_sa_t *this)
 434 {
 435         return this->proposal;
 436 }
 437
 438 METHOD(ike_sa_t, set_proposal, void,
 439         private_ike_sa_t *this, proposal_t *proposal)
 440 {
 441         DESTROY_IF(this->proposal);
 442         this->proposal = proposal->clone(proposal);
 443 }
 444
 445 METHOD(ike_sa_t, set_message_id, void,
 446         private_ike_sa_t *this, bool initiate, u_int32_t mid)
 447 {
 448         if (initiate)
 449         {
 450                 this->task_manager->reset(this->task_manager, mid, UINT_MAX);
 451         }
 452         else
 453         {
 454                 this->task_manager->reset(this->task_manager, UINT_MAX, mid);
 455         }
 456 }
 457
 458 METHOD(ike_sa_t, send_keepalive, void,
 459         private_ike_sa_t *this)
 460 {
 461         send_keepalive_job_t *job;
 462         time_t last_out, now, diff;
 463
 464         if (!(this->conditions & COND_NAT_HERE) || this->keepalive_interval == 0)
 465         {       /* disable keep alives if we are not NATed anymore */
 466                 return;
 467         }
 468
 469         last_out = get_use_time(this, FALSE);
 470         now = time_monotonic(NULL);
 471
 472         diff = now - last_out;
 473
 474         if (diff >= this->keepalive_interval)
 475         {
 476                 packet_t *packet;
 477                 chunk_t data;
 478
 479                 packet = packet_create();
 480                 packet->set_source(packet, this->my_host->clone(this->my_host));
 481                 packet->set_destination(packet, this->other_host->clone(this->other_host));
 482                 data.ptr = malloc(1);
 483                 data.ptr[0] = 0xFF;
 484                 data.len = 1;
 485                 packet->set_data(packet, data);
 486                 DBG1(DBG_IKE, "sending keep alive to %#H", this->other_host);
 487                 charon->sender->send_no_marker(charon->sender, packet);
 488                 diff = 0;
 489         }
 490         job = send_keepalive_job_create(this->ike_sa_id);
 491         lib->scheduler->schedule_job(lib->scheduler, (job_t*)job,
 492                                                                  this->keepalive_interval - diff);
 493 }
 494
 495 METHOD(ike_sa_t, get_ike_cfg, ike_cfg_t*,
 496         private_ike_sa_t *this)
 497 {
 498         return this->ike_cfg;
 499 }
 500
 501 METHOD(ike_sa_t, set_ike_cfg, void,
 502         private_ike_sa_t *this, ike_cfg_t *ike_cfg)
 503 {
 504         ike_cfg->get_ref(ike_cfg);
 505         this->ike_cfg = ike_cfg;
 506 }
 507
 508 METHOD(ike_sa_t, enable_extension, void,
 509         private_ike_sa_t *this, ike_extension_t extension)
 510 {
 511         this->extensions |= extension;
 512 }
 513
 514 METHOD(ike_sa_t, supports_extension, bool,
 515         private_ike_sa_t *this, ike_extension_t extension)
 516 {
 517         return (this->extensions & extension) != FALSE;
 518 }
 519
 520 METHOD(ike_sa_t, has_condition, bool,
 521         private_ike_sa_t *this, ike_condition_t condition)
 522 {
 523         return (this->conditions & condition) != FALSE;
 524 }
 525
 526 METHOD(ike_sa_t, set_condition, void,
 527         private_ike_sa_t *this, ike_condition_t condition, bool enable)
 528 {
 529         if (has_condition(this, condition) != enable)
 530         {
 531                 if (enable)
 532                 {
 533                         this->conditions |= condition;
 534                         switch (condition)
 535                         {
 536                                 case COND_NAT_HERE:
 537                                         DBG1(DBG_IKE, "local host is behind NAT, sending keep alives");
 538                                         this->conditions |= COND_NAT_ANY;
 539                                         send_keepalive(this);
 540                                         break;
 541                                 case COND_NAT_THERE:
 542                                         DBG1(DBG_IKE, "remote host is behind NAT");
 543                                         this->conditions |= COND_NAT_ANY;
 544                                         break;
 545                                 case COND_NAT_FAKE:
 546                                         DBG1(DBG_IKE, "faking NAT situation to enforce UDP encapsulation");
 547                                         this->conditions |= COND_NAT_ANY;
 548                                         break;
 549                                 default:
 550                                         break;
 551                         }
 552                 }
 553                 else
 554                 {
 555                         this->conditions &= ~condition;
 556                         switch (condition)
 557                         {
 558                                 case COND_NAT_HERE:
 559                                 case COND_NAT_FAKE:
 560                                 case COND_NAT_THERE:
 561                                         set_condition(this, COND_NAT_ANY,
 562                                                                   has_condition(this, COND_NAT_HERE) ||
 563                                                                   has_condition(this, COND_NAT_THERE) ||
 564                                                                   has_condition(this, COND_NAT_FAKE));
 565                                         break;
 566                                 default:
 567                                         break;
 568                         }
 569                 }
 570         }
 571 }
 572
 573 METHOD(ike_sa_t, send_dpd, status_t,
 574         private_ike_sa_t *this)
 575 {
 576         job_t *job;
 577         time_t diff, delay;
 578         bool task_queued = FALSE;
 579
 580         if (this->state == IKE_PASSIVE)
 581         {
 582                 return INVALID_STATE;
 583         }
 584         delay = this->peer_cfg->get_dpd(this->peer_cfg);
 585         if (this->task_manager->busy(this->task_manager))
 586         {
 587                 /* an exchange is in the air, no need to start a DPD check */
 588                 diff = 0;
 589         }
 590         else
 591         {
 592                 /* check if there was any inbound traffic */
 593                 time_t last_in, now;
 594                 last_in = get_use_time(this, TRUE);
 595                 now = time_monotonic(NULL);
 596                 diff = now - last_in;
 597                 if (!delay || diff >= delay)
 598                 {
 599                         /* too long ago, initiate dead peer detection */
 600                         DBG1(DBG_IKE, "sending DPD request");
 601                         this->task_manager->queue_dpd(this->task_manager);
 602                         task_queued = TRUE;
 603                         diff = 0;
 604                 }
 605         }
 606         /* recheck in "interval" seconds */
 607         if (delay)
 608         {
 609                 job = (job_t*)send_dpd_job_create(this->ike_sa_id);
 610                 lib->scheduler->schedule_job(lib->scheduler, job, delay - diff);
 611         }
 612         if (task_queued)
 613         {
 614                 return this->task_manager->initiate(this->task_manager);
 615         }
 616         return SUCCESS;
 617 }
 618
 619 METHOD(ike_sa_t, get_state, ike_sa_state_t,
 620         private_ike_sa_t *this)
 621 {
 622         return this->state;
 623 }
 624
 625 METHOD(ike_sa_t, set_state, void,
 626         private_ike_sa_t *this, ike_sa_state_t state)
 627 {
 628         bool trigger_dpd = FALSE;
 629
 630         DBG2(DBG_IKE, "IKE_SA %s[%d] state change: %N => %N",
 631                  get_name(this), this->unique_id,
 632                  ike_sa_state_names, this->state,
 633                  ike_sa_state_names, state);
 634
 635         switch (state)
 636         {
 637                 case IKE_ESTABLISHED:
 638                 {
 639                         if (this->state == IKE_CONNECTING ||
 640                                 this->state == IKE_PASSIVE)
 641                         {
 642                                 job_t *job;
 643                                 u_int32_t t;
 644
 645                                 /* calculate rekey, reauth and lifetime */
 646                                 this->stats[STAT_ESTABLISHED] = time_monotonic(NULL);
 647
 648                                 /* schedule rekeying if we have a time which is smaller than
 649                                  * an already scheduled rekeying */
 650                                 t = this->peer_cfg->get_rekey_time(this->peer_cfg, TRUE);
 651                                 if (t && (this->stats[STAT_REKEY] == 0 ||
 652                                         (this->stats[STAT_REKEY] > t + this->stats[STAT_ESTABLISHED])))
 653                                 {
 654                                         this->stats[STAT_REKEY] = t + this->stats[STAT_ESTABLISHED];
 655                                         job = (job_t*)rekey_ike_sa_job_create(this->ike_sa_id, FALSE);
 656                                         lib->scheduler->schedule_job(lib->scheduler, job, t);
 657                                         DBG1(DBG_IKE, "scheduling rekeying in %ds", t);
 658                                 }
 659                                 t = this->peer_cfg->get_reauth_time(this->peer_cfg, TRUE);
 660                                 if (t && (this->stats[STAT_REAUTH] == 0 ||
 661                                         (this->stats[STAT_REAUTH] > t + this->stats[STAT_ESTABLISHED])))
 662                                 {
 663                                         this->stats[STAT_REAUTH] = t + this->stats[STAT_ESTABLISHED];
 664                                         job = (job_t*)rekey_ike_sa_job_create(this->ike_sa_id, TRUE);
 665                                         lib->scheduler->schedule_job(lib->scheduler, job, t);
 666                                         DBG1(DBG_IKE, "scheduling reauthentication in %ds", t);
 667                                 }
 668                                 t = this->peer_cfg->get_over_time(this->peer_cfg);
 669                                 if (this->stats[STAT_REKEY] || this->stats[STAT_REAUTH])
 670                                 {
 671                                         if (this->stats[STAT_REAUTH] == 0)
 672                                         {
 673                                                 this->stats[STAT_DELETE] = this->stats[STAT_REKEY];
 674                                         }
 675                                         else if (this->stats[STAT_REKEY] == 0)
 676                                         {
 677                                                 this->stats[STAT_DELETE] = this->stats[STAT_REAUTH];
 678                                         }
 679                                         else
 680                                         {
 681                                                 this->stats[STAT_DELETE] = min(this->stats[STAT_REKEY],
 682                                                                                                            this->stats[STAT_REAUTH]);
 683                                         }
 684                                         this->stats[STAT_DELETE] += t;
 685                                         t = this->stats[STAT_DELETE] - this->stats[STAT_ESTABLISHED];
 686                                         job = (job_t*)delete_ike_sa_job_create(this->ike_sa_id, TRUE);
 687                                         lib->scheduler->schedule_job(lib->scheduler, job, t);
 688                                         DBG1(DBG_IKE, "maximum IKE_SA lifetime %ds", t);
 689                                 }
 690                                 trigger_dpd = this->peer_cfg->get_dpd(this->peer_cfg);
 691                         }
 692                         break;
 693                 }
 694                 default:
 695                         break;
 696         }
 697         charon->bus->ike_state_change(charon->bus, &this->public, state);
 698         this->state = state;
 699
 700         if (trigger_dpd)
 701         {
 702                 if (supports_extension(this, EXT_DPD))
 703                 {
 704                         send_dpd(this);
 705                 }
 706                 else
 707                 {
 708                         DBG1(DBG_IKE, "DPD not supported by peer, disabled");
 709                 }
 710         }
 711 }
 712
 713 METHOD(ike_sa_t, reset, void,
 714         private_ike_sa_t *this)
 715 {
 716         /*  the responder ID is reset, as peer may choose another one */
 717         if (this->ike_sa_id->is_initiator(this->ike_sa_id))
 718         {
 719                 this->ike_sa_id->set_responder_spi(this->ike_sa_id, 0);
 720         }
 721
 722         set_state(this, IKE_CREATED);
 723
 724         flush_auth_cfgs(this);
 725
 726         this->keymat->destroy(this->keymat);
 727         this->keymat = keymat_create(this->version,
 728                                                         this->ike_sa_id->is_initiator(this->ike_sa_id));
 729
 730         this->task_manager->reset(this->task_manager, 0, 0);
 731 }
 732
 733 METHOD(ike_sa_t, get_keymat, keymat_t*,
 734         private_ike_sa_t *this)
 735 {
 736         return this->keymat;
 737 }
 738
 739 METHOD(ike_sa_t, add_virtual_ip, void,
 740         private_ike_sa_t *this, bool local, host_t *ip)
 741 {
 742         if (local)
 743         {
 744                 DBG1(DBG_IKE, "installing new virtual IP %H", ip);
 745                 if (hydra->kernel_interface->add_ip(hydra->kernel_interface, ip,
 746                                                                                         this->my_host) == SUCCESS)
 747                 {
 748                         this->my_vips->insert_last(this->my_vips, ip->clone(ip));
 749                 }
 750                 else
 751                 {
 752                         DBG1(DBG_IKE, "installing virtual IP %H failed", ip);
 753                 }
 754         }
 755         else
 756         {
 757                 this->other_vips->insert_last(this->other_vips, ip->clone(ip));
 758         }
 759 }
 760
 761
 762 METHOD(ike_sa_t, clear_virtual_ips, void,
 763         private_ike_sa_t *this, bool local)
 764 {
 765         linked_list_t *vips = local ? this->my_vips : this->other_vips;
 766         host_t *vip;
 767
 768         while (vips->remove_first(vips, (void**)&vip) == SUCCESS)
 769         {
 770                 if (local)
 771                 {
 772                         hydra->kernel_interface->del_ip(hydra->kernel_interface, vip);
 773                 }
 774                 vip->destroy(vip);
 775         }
 776 }
 777
 778 METHOD(ike_sa_t, create_virtual_ip_enumerator, enumerator_t*,
 779         private_ike_sa_t *this, bool local)
 780 {
 781         if (local)
 782         {
 783                 return this->my_vips->create_enumerator(this->my_vips);
 784         }
 785         return this->other_vips->create_enumerator(this->other_vips);
 786 }
 787
 788 METHOD(ike_sa_t, add_peer_address, void,
 789         private_ike_sa_t *this, host_t *host)
 790 {
 791         this->peer_addresses->insert_last(this->peer_addresses, host);
 792 }
 793
 794 METHOD(ike_sa_t, create_peer_address_enumerator, enumerator_t*,
 795         private_ike_sa_t *this)
 796 {
 797         if (this->peer_addresses->get_count(this->peer_addresses))
 798         {
 799                 return this->peer_addresses->create_enumerator(this->peer_addresses);
 800         }
 801         /* in case we don't have MOBIKE */
 802         return enumerator_create_single(this->other_host, NULL);
 803 }
 804
 805 METHOD(ike_sa_t, clear_peer_addresses, void,
 806         private_ike_sa_t *this)
 807 {
 808         enumerator_t *enumerator;
 809         host_t *host;
 810
 811         enumerator = this->peer_addresses->create_enumerator(this->peer_addresses);
 812         while (enumerator->enumerate(enumerator, (void**)&host))
 813         {
 814                 this->peer_addresses->remove_at(this->peer_addresses,
 815                                                                                 enumerator);
 816                 host->destroy(host);
 817         }
 818         enumerator->destroy(enumerator);
 819 }
 820
 821 METHOD(ike_sa_t, has_mapping_changed, bool,
 822         private_ike_sa_t *this, chunk_t hash)
 823 {
 824         if (this->nat_detection_dest.ptr == NULL)
 825         {
 826                 this->nat_detection_dest = chunk_clone(hash);
 827                 return FALSE;
 828         }
 829         if (chunk_equals(hash, this->nat_detection_dest))
 830         {
 831                 return FALSE;
 832         }
 833         free(this->nat_detection_dest.ptr);
 834         this->nat_detection_dest = chunk_clone(hash);
 835         return TRUE;
 836 }
 837
 838 METHOD(ike_sa_t, set_pending_updates, void,
 839         private_ike_sa_t *this, u_int32_t updates)
 840 {
 841         this->pending_updates = updates;
 842 }
 843
 844 METHOD(ike_sa_t, get_pending_updates, u_int32_t,
 845         private_ike_sa_t *this)
 846 {
 847         return this->pending_updates;
 848 }
 849
 850 METHOD(ike_sa_t, float_ports, void,
 851            private_ike_sa_t *this)
 852 {
 853         /* do not switch if we have a custom port from MOBIKE/NAT */
 854         if (this->my_host->get_port(this->my_host) ==
 855                         charon->socket->get_port(charon->socket, FALSE))
 856         {
 857                 this->my_host->set_port(this->my_host,
 858                                                                 charon->socket->get_port(charon->socket, TRUE));
 859         }
 860         if (this->other_host->get_port(this->other_host) == IKEV2_UDP_PORT)
 861         {
 862                 this->other_host->set_port(this->other_host, IKEV2_NATT_PORT);
 863         }
 864 }
 865
 866 METHOD(ike_sa_t, update_hosts, void,
 867         private_ike_sa_t *this, host_t *me, host_t *other, bool force)
 868 {
 869         bool update = FALSE;
 870
 871         if (me == NULL)
 872         {
 873                 me = this->my_host;
 874         }
 875         if (other == NULL)
 876         {
 877                 other = this->other_host;
 878         }
 879
 880         /* apply hosts on first received message */
 881         if (this->my_host->is_anyaddr(this->my_host) ||
 882                 this->other_host->is_anyaddr(this->other_host))
 883         {
 884                 set_my_host(this, me->clone(me));
 885                 set_other_host(this, other->clone(other));
 886                 update = TRUE;
 887         }
 888         else
 889         {
 890                 /* update our address in any case */
 891                 if (!me->equals(me, this->my_host))
 892                 {
 893                         set_my_host(this, me->clone(me));
 894                         update = TRUE;
 895                 }
 896
 897                 if (!other->equals(other, this->other_host))
 898                 {
 899                         /* update others address if we are NOT NATed */
 900                         if (force || !has_condition(this, COND_NAT_HERE))
 901                         {
 902                                 set_other_host(this, other->clone(other));
 903                                 update = TRUE;
 904                         }
 905                 }
 906         }
 907
 908         /* update all associated CHILD_SAs, if required */
 909         if (update)
 910         {
 911                 enumerator_t *enumerator;
 912                 child_sa_t *child_sa;
 913
 914                 enumerator = this->child_sas->create_enumerator(this->child_sas);
 915                 while (enumerator->enumerate(enumerator, (void**)&child_sa))
 916                 {
 917                         if (child_sa->update(child_sa, this->my_host,
 918                                                 this->other_host, this->my_vips,
 919                                                 has_condition(this, COND_NAT_ANY)) == NOT_SUPPORTED)
 920                         {
 921                                 this->public.rekey_child_sa(&this->public,
 922                                                 child_sa->get_protocol(child_sa),
 923                                                 child_sa->get_spi(child_sa, TRUE));
 924                         }
 925                 }
 926                 enumerator->destroy(enumerator);
 927         }
 928 }
 929
 930 METHOD(ike_sa_t, generate_message, status_t,
 931         private_ike_sa_t *this, message_t *message, packet_t **packet)
 932 {
 933         status_t status;
 934
 935         if (message->is_encoded(message))
 936         {       /* already done */
 937                 *packet = message->get_packet(message);
 938                 return SUCCESS;
 939         }
 940         this->stats[STAT_OUTBOUND] = time_monotonic(NULL);
 941         message->set_ike_sa_id(message, this->ike_sa_id);
 942         charon->bus->message(charon->bus, message, FALSE, TRUE);
 943         status = message->generate(message, this->keymat, packet);
 944         if (status == SUCCESS)
 945         {
 946                 charon->bus->message(charon->bus, message, FALSE, FALSE);
 947         }
 948         return status;
 949 }
 950
 951 METHOD(ike_sa_t, set_kmaddress, void,
 952         private_ike_sa_t *this, host_t *local, host_t *remote)
 953 {
 954         DESTROY_IF(this->local_host);
 955         DESTROY_IF(this->remote_host);
 956         this->local_host = local->clone(local);
 957         this->remote_host = remote->clone(remote);
 958 }
 959
 960 #ifdef ME
 961 METHOD(ike_sa_t, act_as_mediation_server, void,
 962         private_ike_sa_t *this)
 963 {
 964         charon->mediation_manager->update_sa_id(charon->mediation_manager,
 965                         this->other_id, this->ike_sa_id);
 966         this->is_mediation_server = TRUE;
 967 }
 968
 969 METHOD(ike_sa_t, get_server_reflexive_host, host_t*,
 970         private_ike_sa_t *this)
 971 {
 972         return this->server_reflexive_host;
 973 }
 974
 975 METHOD(ike_sa_t, set_server_reflexive_host, void,
 976         private_ike_sa_t *this, host_t *host)
 977 {
 978         DESTROY_IF(this->server_reflexive_host);
 979         this->server_reflexive_host = host;
 980 }
 981
 982 METHOD(ike_sa_t, get_connect_id, chunk_t,
 983         private_ike_sa_t *this)
 984 {
 985         return this->connect_id;
 986 }
 987
 988 METHOD(ike_sa_t, respond, status_t,
 989         private_ike_sa_t *this, identification_t *peer_id, chunk_t connect_id)
 990 {
 991         ike_me_t *task = ike_me_create(&this->public, TRUE);
 992         task->respond(task, peer_id, connect_id);
 993         this->task_manager->queue_task(this->task_manager, (task_t*)task);
 994         return this->task_manager->initiate(this->task_manager);
 995 }
 996
 997 METHOD(ike_sa_t, callback, status_t,
 998         private_ike_sa_t *this, identification_t *peer_id)
 999 {
1000         ike_me_t *task = ike_me_create(&this->public, TRUE);
1001         task->callback(task, peer_id);
1002         this->task_manager->queue_task(this->task_manager, (task_t*)task);
1003         return this->task_manager->initiate(this->task_manager);
1004 }
1005
1006 METHOD(ike_sa_t, relay, status_t,
1007         private_ike_sa_t *this, identification_t *requester, chunk_t connect_id,
1008         chunk_t connect_key, linked_list_t *endpoints, bool response)
1009 {
1010         ike_me_t *task = ike_me_create(&this->public, TRUE);
1011         task->relay(task, requester, connect_id, connect_key, endpoints, response);
1012         this->task_manager->queue_task(this->task_manager, (task_t*)task);
1013         return this->task_manager->initiate(this->task_manager);
1014 }
1015
1016 METHOD(ike_sa_t, initiate_mediation, status_t,
1017         private_ike_sa_t *this, peer_cfg_t *mediated_cfg)
1018 {
1019         ike_me_t *task = ike_me_create(&this->public, TRUE);
1020         task->connect(task, mediated_cfg->get_peer_id(mediated_cfg));
1021         this->task_manager->queue_task(this->task_manager, (task_t*)task);
1022         return this->task_manager->initiate(this->task_manager);
1023 }
1024
1025 METHOD(ike_sa_t, initiate_mediated, status_t,
1026         private_ike_sa_t *this, host_t *me, host_t *other, chunk_t connect_id)
1027 {
1028         set_my_host(this, me->clone(me));
1029         set_other_host(this, other->clone(other));
1030         chunk_free(&this->connect_id);
1031         this->connect_id = chunk_clone(connect_id);
1032         return this->task_manager->initiate(this->task_manager);
1033 }
1034 #endif /* ME */
1035
1036 /**
1037  * Resolve DNS host in configuration
1038  */
1039 static void resolve_hosts(private_ike_sa_t *this)
1040 {
1041         host_t *host;
1042
1043         if (this->remote_host)
1044         {
1045                 host = this->remote_host->clone(this->remote_host);
1046                 host->set_port(host, IKEV2_UDP_PORT);
1047         }
1048         else
1049         {
1050                 char *other_addr;
1051                 u_int16_t other_port;
1052
1053                 other_addr = this->ike_cfg->get_other_addr(this->ike_cfg, NULL);
1054                 other_port = this->ike_cfg->get_other_port(this->ike_cfg);
1055                 host = host_create_from_dns(other_addr, 0, other_port);
1056         }
1057         if (host)
1058         {
1059                 set_other_host(this, host);
1060         }
1061
1062         if (this->local_host)
1063         {
1064                 host = this->local_host->clone(this->local_host);
1065                 host->set_port(host, charon->socket->get_port(charon->socket, FALSE));
1066         }
1067         else
1068         {
1069                 char *my_addr;
1070                 u_int16_t my_port;
1071                 int family = 0;
1072
1073                 /* use same address family as for other */
1074                 if (!this->other_host->is_anyaddr(this->other_host))
1075                 {
1076                         family = this->other_host->get_family(this->other_host);
1077                 }
1078                 my_addr = this->ike_cfg->get_my_addr(this->ike_cfg, NULL);
1079                 my_port = this->ike_cfg->get_my_port(this->ike_cfg);
1080                 host = host_create_from_dns(my_addr, family, my_port);
1081
1082                 if (host && host->is_anyaddr(host) &&
1083                         !this->other_host->is_anyaddr(this->other_host))
1084                 {
1085                         host->destroy(host);
1086                         host = hydra->kernel_interface->get_source_addr(
1087                                                         hydra->kernel_interface, this->other_host, NULL);
1088                         if (host)
1089                         {
1090                                 host->set_port(host, this->ike_cfg->get_my_port(this->ike_cfg));
1091                         }
1092                         else
1093                         {       /* fallback to address family specific %any(6), if configured */
1094                                 host = host_create_from_dns(my_addr, 0, my_port);
1095                         }
1096                 }
1097         }
1098         if (host)
1099         {
1100                 set_my_host(this, host);
1101         }
1102 }
1103
1104 METHOD(ike_sa_t, initiate, status_t,
1105         private_ike_sa_t *this, child_cfg_t *child_cfg, u_int32_t reqid,
1106         traffic_selector_t *tsi, traffic_selector_t *tsr)
1107 {
1108         bool defer_initiate = FALSE;
1109
1110         if (this->state == IKE_CREATED)
1111         {
1112                 if (this->my_host->is_anyaddr(this->my_host) ||
1113                         this->other_host->is_anyaddr(this->other_host))
1114                 {
1115                         resolve_hosts(this);
1116                 }
1117
1118                 if (this->other_host->is_anyaddr(this->other_host)
1119 #ifdef ME
1120                         && !this->peer_cfg->get_mediated_by(this->peer_cfg)
1121 #endif /* ME */
1122                         )
1123                 {
1124                         char *addr = this->ike_cfg->get_other_addr(this->ike_cfg, NULL);
1125                         bool is_anyaddr = streq(addr, "%any") || streq(addr, "%any6");
1126
1127                         if (is_anyaddr || !this->retry_initiate_interval)
1128                         {
1129                                 if (is_anyaddr)
1130                                 {
1131                                         DBG1(DBG_IKE, "unable to initiate to %s", addr);
1132                                 }
1133                                 else
1134                                 {
1135                                         DBG1(DBG_IKE, "unable to resolve %s, initiate aborted",
1136                                                  addr);
1137                                 }
1138                                 DESTROY_IF(child_cfg);
1139                                 charon->bus->alert(charon->bus, ALERT_PEER_ADDR_FAILED);
1140                                 return DESTROY_ME;
1141                         }
1142                         DBG1(DBG_IKE, "unable to resolve %s, retrying in %ds",
1143                                  addr, this->retry_initiate_interval);
1144                         defer_initiate = TRUE;
1145                 }
1146
1147                 set_condition(this, COND_ORIGINAL_INITIATOR, TRUE);
1148                 this->task_manager->queue_ike(this->task_manager);
1149         }
1150
1151 #ifdef ME
1152         if (this->peer_cfg->is_mediation(this->peer_cfg))
1153         {
1154                 if (this->state == IKE_ESTABLISHED)
1155                 {
1156                         /* mediation connection is already established, retrigger state
1157                          * change to notify bus listeners */
1158                         DBG1(DBG_IKE, "mediation connection is already up");
1159                         set_state(this, IKE_ESTABLISHED);
1160                 }
1161                 DESTROY_IF(child_cfg);
1162         }
1163         else
1164 #endif /* ME */
1165         if (child_cfg)
1166         {
1167                 /* normal IKE_SA with CHILD_SA */
1168                 this->task_manager->queue_child(this->task_manager, child_cfg, reqid,
1169                                                                                 tsi, tsr);
1170 #ifdef ME
1171                 if (this->peer_cfg->get_mediated_by(this->peer_cfg))
1172                 {
1173                         /* mediated connection, initiate mediation process */
1174                         job_t *job = (job_t*)initiate_mediation_job_create(this->ike_sa_id);
1175                         lib->processor->queue_job(lib->processor, job);
1176                         return SUCCESS;
1177                 }
1178 #endif /* ME */
1179         }
1180
1181         if (defer_initiate)
1182         {
1183                 if (!this->retry_initiate_queued)
1184                 {
1185                         job_t *job = (job_t*)retry_initiate_job_create(this->ike_sa_id);
1186                         lib->scheduler->schedule_job(lib->scheduler, (job_t*)job,
1187                                                                                  this->retry_initiate_interval);
1188                         this->retry_initiate_queued = TRUE;
1189                 }
1190                 return SUCCESS;
1191         }
1192         this->retry_initiate_queued = FALSE;
1193         return this->task_manager->initiate(this->task_manager);
1194 }
1195
1196 METHOD(ike_sa_t, retry_initiate, status_t,
1197         private_ike_sa_t *this)
1198 {
1199         if (this->retry_initiate_queued)
1200         {
1201                 this->retry_initiate_queued = FALSE;
1202                 return initiate(this, NULL, 0, NULL, NULL);
1203         }
1204         return SUCCESS;
1205 }
1206
1207 METHOD(ike_sa_t, process_message, status_t,
1208         private_ike_sa_t *this, message_t *message)
1209 {
1210         status_t status;
1211
1212         if (this->state == IKE_PASSIVE)
1213         {       /* do not handle messages in passive state */
1214                 return FAILED;
1215         }
1216         switch (message->get_exchange_type(message))
1217         {
1218                 case ID_PROT:
1219                 case AGGRESSIVE:
1220                 case IKE_SA_INIT:
1221                 case IKE_AUTH:
1222                         if (this->state != IKE_CREATED &&
1223                                 this->state != IKE_CONNECTING)
1224                         {
1225                                 DBG1(DBG_IKE, "ignoring %N in established IKE_SA state",
1226                                          exchange_type_names, message->get_exchange_type(message));
1227                                 return FAILED;
1228                         }
1229                         break;
1230                 default:
1231                         break;
1232         }
1233         if (message->get_major_version(message) != this->version)
1234         {
1235                 DBG1(DBG_IKE, "ignoring %N IKEv%u exchange on %N SA",
1236                          exchange_type_names, message->get_exchange_type(message),
1237                          message->get_major_version(message),
1238                          ike_version_names, this->version);
1239                 /* TODO-IKEv1: fall back to IKEv1 if we receive an IKEv1
1240                  * INVALID_MAJOR_VERSION on an IKEv2 SA. */
1241                 return FAILED;
1242         }
1243         status = this->task_manager->process_message(this->task_manager, message);
1244         if (this->flush_auth_cfg && this->state == IKE_ESTABLISHED)
1245         {
1246                 /* authentication completed */
1247                 this->flush_auth_cfg = FALSE;
1248                 flush_auth_cfgs(this);
1249         }
1250         return status;
1251 }
1252
1253 METHOD(ike_sa_t, get_id, ike_sa_id_t*,
1254         private_ike_sa_t *this)
1255 {
1256         return this->ike_sa_id;
1257 }
1258
1259 METHOD(ike_sa_t, get_version, ike_version_t,
1260         private_ike_sa_t *this)
1261 {
1262         return this->version;
1263 }
1264
1265 METHOD(ike_sa_t, get_my_id, identification_t*,
1266         private_ike_sa_t *this)
1267 {
1268         return this->my_id;
1269 }
1270
1271 METHOD(ike_sa_t, set_my_id, void,
1272         private_ike_sa_t *this, identification_t *me)
1273 {
1274         DESTROY_IF(this->my_id);
1275         this->my_id = me;
1276 }
1277
1278 METHOD(ike_sa_t, get_other_id, identification_t*,
1279         private_ike_sa_t *this)
1280 {
1281         return this->other_id;
1282 }
1283
1284 METHOD(ike_sa_t, get_other_eap_id, identification_t*,
1285         private_ike_sa_t *this)
1286 {
1287         identification_t *id = NULL, *current;
1288         enumerator_t *enumerator;
1289         auth_cfg_t *cfg;
1290
1291         enumerator = this->other_auths->create_enumerator(this->other_auths);
1292         while (enumerator->enumerate(enumerator, &cfg))
1293         {
1294                 /* prefer EAP-Identity of last round */
1295                 current = cfg->get(cfg, AUTH_RULE_EAP_IDENTITY);
1296                 if (!current || current->get_type(current) == ID_ANY)
1297                 {
1298                         current = cfg->get(cfg, AUTH_RULE_XAUTH_IDENTITY);
1299                 }
1300                 if (!current || current->get_type(current) == ID_ANY)
1301                 {
1302                         current = cfg->get(cfg, AUTH_RULE_IDENTITY);
1303                 }
1304                 if (current && current->get_type(current) != ID_ANY)
1305                 {
1306                         id = current;
1307                         continue;
1308                 }
1309         }
1310         enumerator->destroy(enumerator);
1311         if (id)
1312         {
1313                 return id;
1314         }
1315         return this->other_id;
1316 }
1317
1318 METHOD(ike_sa_t, set_other_id, void,
1319         private_ike_sa_t *this, identification_t *other)
1320 {
1321         DESTROY_IF(this->other_id);
1322         this->other_id = other;
1323 }
1324
1325 METHOD(ike_sa_t, add_child_sa, void,
1326         private_ike_sa_t *this, child_sa_t *child_sa)
1327 {
1328         this->child_sas->insert_last(this->child_sas, child_sa);
1329 }
1330
1331 METHOD(ike_sa_t, get_child_sa, child_sa_t*,
1332         private_ike_sa_t *this, protocol_id_t protocol, u_int32_t spi, bool inbound)
1333 {
1334         enumerator_t *enumerator;
1335         child_sa_t *current, *found = NULL;
1336
1337         enumerator = this->child_sas->create_enumerator(this->child_sas);
1338         while (enumerator->enumerate(enumerator, (void**)&current))
1339         {
1340                 if (current->get_spi(current, inbound) == spi &&
1341                         current->get_protocol(current) == protocol)
1342                 {
1343                         found = current;
1344                 }
1345         }
1346         enumerator->destroy(enumerator);
1347         return found;
1348 }
1349
1350 METHOD(ike_sa_t, get_child_count, int,
1351         private_ike_sa_t *this)
1352 {
1353         return this->child_sas->get_count(this->child_sas);
1354 }
1355
1356 METHOD(ike_sa_t, create_child_sa_enumerator, enumerator_t*,
1357         private_ike_sa_t *this)
1358 {
1359         return this->child_sas->create_enumerator(this->child_sas);
1360 }
1361
1362 METHOD(ike_sa_t, remove_child_sa, void,
1363         private_ike_sa_t *this, enumerator_t *enumerator)
1364 {
1365         this->child_sas->remove_at(this->child_sas, enumerator);
1366 }
1367
1368 METHOD(ike_sa_t, rekey_child_sa, status_t,
1369         private_ike_sa_t *this, protocol_id_t protocol, u_int32_t spi)
1370 {
1371         if (this->state == IKE_PASSIVE)
1372         {
1373                 return INVALID_STATE;
1374         }
1375         this->task_manager->queue_child_rekey(this->task_manager, protocol, spi);
1376         return this->task_manager->initiate(this->task_manager);
1377 }
1378
1379 METHOD(ike_sa_t, delete_child_sa, status_t,
1380         private_ike_sa_t *this, protocol_id_t protocol, u_int32_t spi, bool expired)
1381 {
1382         if (this->state == IKE_PASSIVE)
1383         {
1384                 return INVALID_STATE;
1385         }
1386         this->task_manager->queue_child_delete(this->task_manager,
1387                                                                                    protocol, spi, expired);
1388         return this->task_manager->initiate(this->task_manager);
1389 }
1390
1391 METHOD(ike_sa_t, destroy_child_sa, status_t,
1392         private_ike_sa_t *this, protocol_id_t protocol, u_int32_t spi)
1393 {
1394         enumerator_t *enumerator;
1395         child_sa_t *child_sa;
1396         status_t status = NOT_FOUND;
1397
1398         enumerator = this->child_sas->create_enumerator(this->child_sas);
1399         while (enumerator->enumerate(enumerator, (void**)&child_sa))
1400         {
1401                 if (child_sa->get_protocol(child_sa) == protocol &&
1402                         child_sa->get_spi(child_sa, TRUE) == spi)
1403                 {
1404                         this->child_sas->remove_at(this->child_sas, enumerator);
1405                         child_sa->destroy(child_sa);
1406                         status = SUCCESS;
1407                         break;
1408                 }
1409         }
1410         enumerator->destroy(enumerator);
1411         return status;
1412 }
1413
1414 METHOD(ike_sa_t, delete_, status_t,
1415         private_ike_sa_t *this)
1416 {
1417         switch (this->state)
1418         {
1419                 case IKE_REKEYING:
1420                         if (this->version == IKEV1)
1421                         {       /* SA has been reauthenticated, delete */
1422                                 charon->bus->ike_updown(charon->bus, &this->public, FALSE);
1423                                 break;
1424                         }
1425                         /* FALL */
1426                 case IKE_ESTABLISHED:
1427                         this->task_manager->queue_ike_delete(this->task_manager);
1428                         return this->task_manager->initiate(this->task_manager);
1429                 case IKE_CREATED:
1430                         DBG1(DBG_IKE, "deleting unestablished IKE_SA");
1431                         break;
1432                 case IKE_PASSIVE:
1433                         break;
1434                 default:
1435                         DBG1(DBG_IKE, "destroying IKE_SA in state %N "
1436                                 "without notification", ike_sa_state_names, this->state);
1437                         charon->bus->ike_updown(charon->bus, &this->public, FALSE);
1438                         break;
1439         }
1440         return DESTROY_ME;
1441 }
1442
1443 METHOD(ike_sa_t, rekey, status_t,
1444         private_ike_sa_t *this)
1445 {
1446         if (this->state == IKE_PASSIVE)
1447         {
1448                 return INVALID_STATE;
1449         }
1450         this->task_manager->queue_ike_rekey(this->task_manager);
1451         return this->task_manager->initiate(this->task_manager);
1452 }
1453
1454 METHOD(ike_sa_t, reauth, status_t,
1455         private_ike_sa_t *this)
1456 {
1457         if (this->state == IKE_PASSIVE)
1458         {
1459                 return INVALID_STATE;
1460         }
1461         /* we can't reauthenticate as responder when we use EAP or virtual IPs.
1462          * If the peer does not support RFC4478, there is no way to keep the
1463          * IKE_SA up. */
1464         if (!has_condition(this, COND_ORIGINAL_INITIATOR))
1465         {
1466                 DBG1(DBG_IKE, "initiator did not reauthenticate as requested");
1467                 if (this->other_vips->get_count(this->other_vips) != 0 ||
1468                         has_condition(this, COND_XAUTH_AUTHENTICATED) ||
1469                         has_condition(this, COND_EAP_AUTHENTICATED)
1470 #ifdef ME
1471                         /* as mediation server we too cannot reauth the IKE_SA */
1472                         || this->is_mediation_server
1473 #endif /* ME */
1474                         )
1475                 {
1476                         time_t del, now;
1477
1478                         del = this->stats[STAT_DELETE];
1479                         now = time_monotonic(NULL);
1480                         DBG1(DBG_IKE, "IKE_SA %s[%d] will timeout in %V",
1481                                  get_name(this), this->unique_id, &now, &del);
1482                         return FAILED;
1483                 }
1484                 else
1485                 {
1486                         DBG0(DBG_IKE, "reauthenticating IKE_SA %s[%d] actively",
1487                                  get_name(this), this->unique_id);
1488                 }
1489         }
1490         else
1491         {
1492                 DBG0(DBG_IKE, "reauthenticating IKE_SA %s[%d]",
1493                          get_name(this), this->unique_id);
1494         }
1495         set_condition(this, COND_REAUTHENTICATING, TRUE);
1496         this->task_manager->queue_ike_reauth(this->task_manager);
1497         return this->task_manager->initiate(this->task_manager);
1498 }
1499
1500 METHOD(ike_sa_t, reestablish, status_t,
1501         private_ike_sa_t *this)
1502 {
1503         ike_sa_t *new;
1504         host_t *host;
1505         action_t action;
1506         enumerator_t *enumerator;
1507         child_sa_t *child_sa;
1508         child_cfg_t *child_cfg;
1509         bool restart = FALSE;
1510         status_t status = FAILED;
1511
1512         if (has_condition(this, COND_REAUTHENTICATING))
1513         {       /* only reauthenticate if we have children */
1514                 if (this->child_sas->get_count(this->child_sas) == 0
1515 #ifdef ME
1516                         /* allow reauth of mediation connections without CHILD_SAs */
1517                         && !this->peer_cfg->is_mediation(this->peer_cfg)
1518 #endif /* ME */
1519                         )
1520                 {
1521                         DBG1(DBG_IKE, "unable to reauthenticate IKE_SA, no CHILD_SA "
1522                                  "to recreate");
1523                 }
1524                 else
1525                 {
1526                         restart = TRUE;
1527                 }
1528         }
1529         else
1530         {       /* check if we have children to keep up at all */
1531                 enumerator = this->child_sas->create_enumerator(this->child_sas);
1532                 while (enumerator->enumerate(enumerator, (void**)&child_sa))
1533                 {
1534                         if (this->state == IKE_DELETING)
1535                         {
1536                                 action = child_sa->get_close_action(child_sa);
1537                         }
1538                         else
1539                         {
1540                                 action = child_sa->get_dpd_action(child_sa);
1541                         }
1542                         switch (action)
1543                         {
1544                                 case ACTION_RESTART:
1545                                         restart = TRUE;
1546                                         break;
1547                                 case ACTION_ROUTE:
1548                                         charon->traps->install(charon->traps, this->peer_cfg,
1549                                                                                    child_sa->get_config(child_sa));
1550                                         break;
1551                                 default:
1552                                         break;
1553                         }
1554                 }
1555                 enumerator->destroy(enumerator);
1556 #ifdef ME
1557                 /* mediation connections have no children, keep them up anyway */
1558                 if (this->peer_cfg->is_mediation(this->peer_cfg))
1559                 {
1560                         restart = TRUE;
1561                 }
1562 #endif /* ME */
1563         }
1564         if (!restart)
1565         {
1566                 return FAILED;
1567         }
1568
1569         /* check if we are able to reestablish this IKE_SA */
1570         if (!has_condition(this, COND_ORIGINAL_INITIATOR) &&
1571                 (this->other_vips->get_count(this->other_vips) != 0 ||
1572                  has_condition(this, COND_EAP_AUTHENTICATED)
1573 #ifdef ME
1574                  || this->is_mediation_server
1575 #endif /* ME */
1576                 ))
1577         {
1578                 DBG1(DBG_IKE, "unable to reestablish IKE_SA due to asymmetric setup");
1579                 return FAILED;
1580         }
1581
1582         new = charon->ike_sa_manager->checkout_new(charon->ike_sa_manager,
1583                                                                                            this->version, TRUE);
1584         if (!new)
1585         {
1586                 return FAILED;
1587         }
1588         new->set_peer_cfg(new, this->peer_cfg);
1589         host = this->other_host;
1590         new->set_other_host(new, host->clone(host));
1591         host = this->my_host;
1592         new->set_my_host(new, host->clone(host));
1593         /* if we already have a virtual IP, we reuse it */
1594         enumerator = this->my_vips->create_enumerator(this->my_vips);
1595         while (enumerator->enumerate(enumerator, &host))
1596         {
1597                 new->add_virtual_ip(new, TRUE, host);
1598         }
1599         enumerator->destroy(enumerator);
1600
1601 #ifdef ME
1602         if (this->peer_cfg->is_mediation(this->peer_cfg))
1603         {
1604                 status = new->initiate(new, NULL, 0, NULL, NULL);
1605         }
1606         else
1607 #endif /* ME */
1608         {
1609                 enumerator = this->child_sas->create_enumerator(this->child_sas);
1610                 while (enumerator->enumerate(enumerator, (void**)&child_sa))
1611                 {
1612                         if (has_condition(this, COND_REAUTHENTICATING))
1613                         {
1614                                 switch (child_sa->get_state(child_sa))
1615                                 {
1616                                         case CHILD_ROUTED:
1617                                         {       /* move routed child directly */
1618                                                 this->child_sas->remove_at(this->child_sas, enumerator);
1619                                                 new->add_child_sa(new, child_sa);
1620                                                 action = ACTION_NONE;
1621                                                 break;
1622                                         }
1623                                         default:
1624                                         {       /* initiate/queue all other CHILD_SAs */
1625                                                 action = ACTION_RESTART;
1626                                                 break;
1627                                         }
1628                                 }
1629                         }
1630                         else
1631                         {       /* only restart CHILD_SAs that are configured accordingly */
1632                                 if (this->state == IKE_DELETING)
1633                                 {
1634                                         action = child_sa->get_close_action(child_sa);
1635                                 }
1636                                 else
1637                                 {
1638                                         action = child_sa->get_dpd_action(child_sa);
1639                                 }
1640                         }
1641                         switch (action)
1642                         {
1643                                 case ACTION_RESTART:
1644                                         child_cfg = child_sa->get_config(child_sa);
1645                                         DBG1(DBG_IKE, "restarting CHILD_SA %s",
1646                                                  child_cfg->get_name(child_cfg));
1647                                         child_cfg->get_ref(child_cfg);
1648                                         status = new->initiate(new, child_cfg, 0, NULL, NULL);
1649                                         break;
1650                                 default:
1651                                         continue;
1652                         }
1653                         if (status == DESTROY_ME)
1654                         {
1655                                 break;
1656                         }
1657                 }
1658                 enumerator->destroy(enumerator);
1659         }
1660
1661         if (status == DESTROY_ME)
1662         {
1663                 charon->ike_sa_manager->checkin_and_destroy(charon->ike_sa_manager, new);
1664                 status = FAILED;
1665         }
1666         else
1667         {
1668                 charon->bus->ike_reestablish(charon->bus, &this->public, new);
1669                 charon->ike_sa_manager->checkin(charon->ike_sa_manager, new);
1670                 status = SUCCESS;
1671         }
1672         charon->bus->set_sa(charon->bus, &this->public);
1673         return status;
1674 }
1675
1676 METHOD(ike_sa_t, retransmit, status_t,
1677         private_ike_sa_t *this, u_int32_t message_id)
1678 {
1679         if (this->state == IKE_PASSIVE)
1680         {
1681                 return INVALID_STATE;
1682         }
1683         this->stats[STAT_OUTBOUND] = time_monotonic(NULL);
1684         if (this->task_manager->retransmit(this->task_manager, message_id) != SUCCESS)
1685         {
1686                 /* send a proper signal to brief interested bus listeners */
1687                 switch (this->state)
1688                 {
1689                         case IKE_CONNECTING:
1690                         {
1691                                 /* retry IKE_SA_INIT/Main Mode if we have multiple keyingtries */
1692                                 u_int32_t tries = this->peer_cfg->get_keyingtries(this->peer_cfg);
1693                                 this->keyingtry++;
1694                                 if (tries == 0 || tries > this->keyingtry)
1695                                 {
1696                                         DBG1(DBG_IKE, "peer not responding, trying again (%d/%d)",
1697                                                  this->keyingtry + 1, tries);
1698                                         reset(this);
1699                                         resolve_hosts(this);
1700                                         this->task_manager->queue_ike(this->task_manager);
1701                                         return this->task_manager->initiate(this->task_manager);
1702                                 }
1703                                 DBG1(DBG_IKE, "establishing IKE_SA failed, peer not responding");
1704                                 break;
1705                         }
1706                         case IKE_DELETING:
1707                                 DBG1(DBG_IKE, "proper IKE_SA delete failed, peer not responding");
1708                                 if (has_condition(this, COND_REAUTHENTICATING))
1709                                 {
1710                                         DBG1(DBG_IKE, "delete during reauthentication failed, "
1711                                                  "trying to reestablish IKE_SA anyway");
1712                                         reestablish(this);
1713                                 }
1714                                 break;
1715                         case IKE_REKEYING:
1716                                 DBG1(DBG_IKE, "rekeying IKE_SA failed, peer not responding");
1717                                 /* FALL */
1718                         default:
1719                                 reestablish(this);
1720                                 break;
1721                 }
1722                 if (this->state != IKE_CONNECTING)
1723                 {
1724                         charon->bus->ike_updown(charon->bus, &this->public, FALSE);
1725                 }
1726                 return DESTROY_ME;
1727         }
1728         return SUCCESS;
1729 }
1730
1731 METHOD(ike_sa_t, set_auth_lifetime, status_t,
1732         private_ike_sa_t *this, u_int32_t lifetime)
1733 {
1734         u_int32_t diff, hard, soft, now;
1735         ike_auth_lifetime_t *task;
1736         bool send_update;
1737
1738         diff = this->peer_cfg->get_over_time(this->peer_cfg);
1739         now = time_monotonic(NULL);
1740         hard = now + lifetime;
1741         soft = hard - diff;
1742
1743         /* check if we have to send an AUTH_LIFETIME to enforce the new lifetime.
1744          * We send the notify in IKE_AUTH if not yet ESTABLISHED. */
1745         send_update = this->state == IKE_ESTABLISHED && this->version == IKEV2 &&
1746                                   !has_condition(this, COND_ORIGINAL_INITIATOR) &&
1747                                   (this->other_vips->get_count(this->other_vips) != 0 ||
1748                                   has_condition(this, COND_EAP_AUTHENTICATED));
1749
1750         if (lifetime < diff)
1751         {
1752                 this->stats[STAT_REAUTH] = now;
1753
1754                 if (!send_update)
1755                 {
1756                         DBG1(DBG_IKE, "received AUTH_LIFETIME of %ds, "
1757                                  "starting reauthentication", lifetime);
1758                         lib->processor->queue_job(lib->processor,
1759                                         (job_t*)rekey_ike_sa_job_create(this->ike_sa_id, TRUE));
1760                 }
1761         }
1762         else if (this->stats[STAT_REAUTH] == 0 ||
1763                          this->stats[STAT_REAUTH] > soft)
1764         {
1765                 this->stats[STAT_REAUTH] = soft;
1766                 if (!send_update)
1767                 {
1768                         DBG1(DBG_IKE, "received AUTH_LIFETIME of %ds, scheduling "
1769                                  "reauthentication in %ds", lifetime, lifetime - diff);
1770                         lib->scheduler->schedule_job(lib->scheduler,
1771                                                 (job_t*)rekey_ike_sa_job_create(this->ike_sa_id, TRUE),
1772                                                 lifetime - diff);
1773                 }
1774         }
1775         else
1776         {
1777                 DBG1(DBG_IKE, "received AUTH_LIFETIME of %ds, "
1778                          "reauthentication already scheduled in %ds", lifetime,
1779                          this->stats[STAT_REAUTH] - time_monotonic(NULL));
1780                 send_update = FALSE;
1781         }
1782         /* give at least some seconds to reauthenticate */
1783         this->stats[STAT_DELETE] = max(hard, now + 10);
1784
1785         if (send_update)
1786         {
1787                 task = ike_auth_lifetime_create(&this->public, TRUE);
1788                 this->task_manager->queue_task(this->task_manager, &task->task);
1789                 return this->task_manager->initiate(this->task_manager);
1790         }
1791         return SUCCESS;
1792 }
1793
1794 /**
1795  * Check if the current combination of source and destination address is still
1796  * valid.
1797  */
1798 static bool is_current_path_valid(private_ike_sa_t *this)
1799 {
1800         bool valid = FALSE;
1801         host_t *src;
1802         src = hydra->kernel_interface->get_source_addr(hydra->kernel_interface,
1803                                                                                         this->other_host, this->my_host);
1804         if (src)
1805         {
1806                 if (src->ip_equals(src, this->my_host))
1807                 {
1808                         valid = TRUE;
1809                 }
1810                 src->destroy(src);
1811         }
1812         return valid;
1813 }
1814
1815 /**
1816  * Check if we have any path avialable for this IKE SA.
1817  */
1818 static bool is_any_path_valid(private_ike_sa_t *this)
1819 {
1820         bool valid = FALSE;
1821         enumerator_t *enumerator;
1822         host_t *src = NULL, *addr;
1823
1824         DBG1(DBG_IKE, "old path is not available anymore, try to find another");
1825         enumerator = create_peer_address_enumerator(this);
1826         while (enumerator->enumerate(enumerator, &addr))
1827         {
1828                 DBG1(DBG_IKE, "looking for a route to %H ...", addr);
1829                 src = hydra->kernel_interface->get_source_addr(
1830                                                                                 hydra->kernel_interface, addr, NULL);
1831                 if (src)
1832                 {
1833                         break;
1834                 }
1835         }
1836         enumerator->destroy(enumerator);
1837         if (src)
1838         {
1839                 valid = TRUE;
1840                 src->destroy(src);
1841         }
1842         return valid;
1843 }
1844
1845 METHOD(ike_sa_t, roam, status_t,
1846         private_ike_sa_t *this, bool address)
1847 {
1848         switch (this->state)
1849         {
1850                 case IKE_CREATED:
1851                 case IKE_DELETING:
1852                 case IKE_DESTROYING:
1853                 case IKE_PASSIVE:
1854                         return SUCCESS;
1855                 default:
1856                         break;
1857         }
1858
1859         /* keep existing path if possible */
1860         if (is_current_path_valid(this))
1861         {
1862                 DBG2(DBG_IKE, "keeping connection path %H - %H",
1863                          this->my_host, this->other_host);
1864                 set_condition(this, COND_STALE, FALSE);
1865
1866                 if (supports_extension(this, EXT_MOBIKE) && address)
1867                 {       /* if any addresses changed, send an updated list */
1868                         DBG1(DBG_IKE, "sending address list update using MOBIKE");
1869                         this->task_manager->queue_mobike(this->task_manager, FALSE, TRUE);
1870                         return this->task_manager->initiate(this->task_manager);
1871                 }
1872                 return SUCCESS;
1873         }
1874
1875         if (!is_any_path_valid(this))
1876         {
1877                 DBG1(DBG_IKE, "no route found to reach %H, MOBIKE update deferred",
1878                          this->other_host);
1879                 set_condition(this, COND_STALE, TRUE);
1880                 return SUCCESS;
1881         }
1882         set_condition(this, COND_STALE, FALSE);
1883
1884         /* update addresses with mobike, if supported ... */
1885         if (supports_extension(this, EXT_MOBIKE))
1886         {
1887                 if (!has_condition(this, COND_ORIGINAL_INITIATOR))
1888                 {       /* responder updates the peer about changed address config */
1889                         DBG1(DBG_IKE, "sending address list update using MOBIKE, "
1890                                  "implicitly requesting an address change");
1891                         address = TRUE;
1892                 }
1893                 else
1894                 {
1895                         DBG1(DBG_IKE, "requesting address change using MOBIKE");
1896                 }
1897                 this->task_manager->queue_mobike(this->task_manager, TRUE, address);
1898                 return this->task_manager->initiate(this->task_manager);
1899         }
1900
1901         /* ... reauth if not */
1902         if (!has_condition(this, COND_ORIGINAL_INITIATOR))
1903         {       /* responder does not reauthenticate */
1904                 set_condition(this, COND_STALE, TRUE);
1905                 return SUCCESS;
1906         }
1907         DBG1(DBG_IKE, "reauthenticating IKE_SA due to address change");
1908         /* since our previous path is not valid anymore, try and find a new one */
1909         resolve_hosts(this);
1910         return reauth(this);
1911 }
1912
1913 METHOD(ike_sa_t, add_configuration_attribute, void,
1914         private_ike_sa_t *this, attribute_handler_t *handler,
1915         configuration_attribute_type_t type, chunk_t data)
1916 {
1917         attribute_entry_t *entry = malloc_thing(attribute_entry_t);
1918
1919         entry->handler = handler;
1920         entry->type = type;
1921         entry->data = chunk_clone(data);
1922
1923         this->attributes->insert_last(this->attributes, entry);
1924 }
1925
1926 METHOD(ike_sa_t, create_task_enumerator, enumerator_t*,
1927         private_ike_sa_t *this, task_queue_t queue)
1928 {
1929         return this->task_manager->create_task_enumerator(this->task_manager, queue);
1930 }
1931
1932 METHOD(ike_sa_t, flush_queue, void,
1933         private_ike_sa_t *this, task_queue_t queue)
1934 {
1935         this->task_manager->flush_queue(this->task_manager, queue);
1936 }
1937
1938 METHOD(ike_sa_t, queue_task, void,
1939         private_ike_sa_t *this, task_t *task)
1940 {
1941         this->task_manager->queue_task(this->task_manager, task);
1942 }
1943
1944 METHOD(ike_sa_t, inherit, void,
1945         private_ike_sa_t *this, ike_sa_t *other_public)
1946 {
1947         private_ike_sa_t *other = (private_ike_sa_t*)other_public;
1948         child_sa_t *child_sa;
1949         attribute_entry_t *entry;
1950         enumerator_t *enumerator;
1951         auth_cfg_t *cfg;
1952         host_t *vip;
1953
1954         /* apply hosts and ids */
1955         this->my_host->destroy(this->my_host);
1956         this->other_host->destroy(this->other_host);
1957         this->my_id->destroy(this->my_id);
1958         this->other_id->destroy(this->other_id);
1959         this->my_host = other->my_host->clone(other->my_host);
1960         this->other_host = other->other_host->clone(other->other_host);
1961         this->my_id = other->my_id->clone(other->my_id);
1962         this->other_id = other->other_id->clone(other->other_id);
1963
1964         /* apply assigned virtual IPs... */
1965         while (this->my_vips->remove_last(this->my_vips, (void**)&vip) == SUCCESS)
1966         {
1967                 other->my_vips->insert_first(other->my_vips, vip);
1968         }
1969         while (this->other_vips->remove_last(this->other_vips,
1970                                                                                  (void**)&vip) == SUCCESS)
1971         {
1972                 other->other_vips->insert_first(other->other_vips, vip);
1973         }
1974
1975         /* authentication information */
1976         enumerator = other->my_auths->create_enumerator(other->my_auths);
1977         while (enumerator->enumerate(enumerator, &cfg))
1978         {
1979                 this->my_auths->insert_last(this->my_auths, cfg->clone(cfg));
1980         }
1981         enumerator->destroy(enumerator);
1982         enumerator = other->other_auths->create_enumerator(other->other_auths);
1983         while (enumerator->enumerate(enumerator, &cfg))
1984         {
1985                 this->other_auths->insert_last(this->other_auths, cfg->clone(cfg));
1986         }
1987         enumerator->destroy(enumerator);
1988
1989         /* ... and configuration attributes */
1990         while (other->attributes->remove_last(other->attributes,
1991                                                                                   (void**)&entry) == SUCCESS)
1992         {
1993                 this->attributes->insert_first(this->attributes, entry);
1994         }
1995
1996         /* inherit all conditions */
1997         this->conditions = other->conditions;
1998         if (this->conditions & COND_NAT_HERE)
1999         {
2000                 send_keepalive(this);
2001         }
2002
2003 #ifdef ME
2004         if (other->is_mediation_server)
2005         {
2006                 act_as_mediation_server(this);
2007         }
2008         else if (other->server_reflexive_host)
2009         {
2010                 this->server_reflexive_host = other->server_reflexive_host->clone(
2011                                 other->server_reflexive_host);
2012         }
2013 #endif /* ME */
2014
2015         /* adopt all children */
2016         while (other->child_sas->remove_last(other->child_sas,
2017                                                                                  (void**)&child_sa) == SUCCESS)
2018         {
2019                 this->child_sas->insert_first(this->child_sas, (void*)child_sa);
2020         }
2021
2022         /* move pending tasks to the new IKE_SA */
2023         this->task_manager->adopt_tasks(this->task_manager, other->task_manager);
2024
2025         /* reauthentication timeout survives a rekeying */
2026         if (other->stats[STAT_REAUTH])
2027         {
2028                 time_t reauth, delete, now = time_monotonic(NULL);
2029
2030                 this->stats[STAT_REAUTH] = other->stats[STAT_REAUTH];
2031                 reauth = this->stats[STAT_REAUTH] - now;
2032                 delete = reauth + this->peer_cfg->get_over_time(this->peer_cfg);
2033                 this->stats[STAT_DELETE] = this->stats[STAT_REAUTH] + delete;
2034                 DBG1(DBG_IKE, "rescheduling reauthentication in %ds after rekeying, "
2035                          "lifetime reduced to %ds", reauth, delete);
2036                 lib->scheduler->schedule_job(lib->scheduler,
2037                                 (job_t*)rekey_ike_sa_job_create(this->ike_sa_id, TRUE), reauth);
2038                 lib->scheduler->schedule_job(lib->scheduler,
2039                                 (job_t*)delete_ike_sa_job_create(this->ike_sa_id, TRUE), delete);
2040         }
2041 }
2042
2043 METHOD(ike_sa_t, destroy, void,
2044         private_ike_sa_t *this)
2045 {
2046         attribute_entry_t *entry;
2047         host_t *vip;
2048
2049         charon->bus->set_sa(charon->bus, &this->public);
2050
2051         set_state(this, IKE_DESTROYING);
2052         DESTROY_IF(this->task_manager);
2053
2054         /* remove attributes first, as we pass the IKE_SA to the handler */
2055         while (this->attributes->remove_last(this->attributes,
2056                                                                                  (void**)&entry) == SUCCESS)
2057         {
2058                 hydra->attributes->release(hydra->attributes, entry->handler,
2059                                                                    this->other_id, entry->type, entry->data);
2060                 free(entry->data.ptr);
2061                 free(entry);
2062         }
2063         this->attributes->destroy(this->attributes);
2064
2065         this->child_sas->destroy_offset(this->child_sas, offsetof(child_sa_t, destroy));
2066
2067         /* unset SA after here to avoid usage by the listeners */
2068         charon->bus->set_sa(charon->bus, NULL);
2069
2070         DESTROY_IF(this->keymat);
2071
2072         while (this->my_vips->remove_last(this->my_vips, (void**)&vip) == SUCCESS)
2073         {
2074                 hydra->kernel_interface->del_ip(hydra->kernel_interface, vip);
2075                 vip->destroy(vip);
2076         }
2077         this->my_vips->destroy(this->my_vips);
2078         while (this->other_vips->remove_last(this->other_vips,
2079                                                                                  (void**)&vip) == SUCCESS)
2080         {
2081                 if (this->peer_cfg)
2082                 {
2083                         linked_list_t *pools;
2084                         identification_t *id;
2085
2086                         id = get_other_eap_id(this);
2087                         pools = linked_list_create_from_enumerator(
2088                                                 this->peer_cfg->create_pool_enumerator(this->peer_cfg));
2089                         hydra->attributes->release_address(hydra->attributes, pools, vip, id);
2090                         pools->destroy(pools);
2091                 }
2092                 vip->destroy(vip);
2093         }
2094         this->other_vips->destroy(this->other_vips);
2095         this->peer_addresses->destroy_offset(this->peer_addresses,
2096                                                                                  offsetof(host_t, destroy));
2097 #ifdef ME
2098         if (this->is_mediation_server)
2099         {
2100                 charon->mediation_manager->remove(charon->mediation_manager,
2101                                                                                   this->ike_sa_id);
2102         }
2103         DESTROY_IF(this->server_reflexive_host);
2104         chunk_free(&this->connect_id);
2105 #endif /* ME */
2106         free(this->nat_detection_dest.ptr);
2107
2108         DESTROY_IF(this->my_host);
2109         DESTROY_IF(this->other_host);
2110         DESTROY_IF(this->my_id);
2111         DESTROY_IF(this->other_id);
2112         DESTROY_IF(this->local_host);
2113         DESTROY_IF(this->remote_host);
2114
2115         DESTROY_IF(this->ike_cfg);
2116         DESTROY_IF(this->peer_cfg);
2117         DESTROY_IF(this->proposal);
2118         this->my_auth->destroy(this->my_auth);
2119         this->other_auth->destroy(this->other_auth);
2120         this->my_auths->destroy_offset(this->my_auths,
2121                                                                    offsetof(auth_cfg_t, destroy));
2122         this->other_auths->destroy_offset(this->other_auths,
2123                                                                           offsetof(auth_cfg_t, destroy));
2124
2125         this->ike_sa_id->destroy(this->ike_sa_id);
2126         free(this);
2127 }
2128
2129 /*
2130  * Described in header.
2131  */
2132 ike_sa_t * ike_sa_create(ike_sa_id_t *ike_sa_id, bool initiator,
2133                                                  ike_version_t version)
2134 {
2135         private_ike_sa_t *this;
2136         static u_int32_t unique_id = 0;
2137
2138         if (version == IKE_ANY)
2139         {       /* prefer IKEv2 if protocol not specified */
2140 #ifdef USE_IKEV2
2141                 version = IKEV2;
2142 #else
2143                 version = IKEV1;
2144 #endif
2145         }
2146
2147         INIT(this,
2148                 .public = {
2149                         .get_version = _get_version,
2150                         .get_state = _get_state,
2151                         .set_state = _set_state,
2152                         .get_name = _get_name,
2153                         .get_statistic = _get_statistic,
2154                         .set_statistic = _set_statistic,
2155                         .process_message = _process_message,
2156                         .initiate = _initiate,
2157                         .retry_initiate = _retry_initiate,
2158                         .get_ike_cfg = _get_ike_cfg,
2159                         .set_ike_cfg = _set_ike_cfg,
2160                         .get_peer_cfg = _get_peer_cfg,
2161                         .set_peer_cfg = _set_peer_cfg,
2162                         .get_auth_cfg = _get_auth_cfg,
2163                         .create_auth_cfg_enumerator = _create_auth_cfg_enumerator,
2164                         .add_auth_cfg = _add_auth_cfg,
2165                         .get_proposal = _get_proposal,
2166                         .set_proposal = _set_proposal,
2167                         .get_id = _get_id,
2168                         .get_my_host = _get_my_host,
2169                         .set_my_host = _set_my_host,
2170                         .get_other_host = _get_other_host,
2171                         .set_other_host = _set_other_host,
2172                         .set_message_id = _set_message_id,
2173                         .float_ports = _float_ports,
2174                         .update_hosts = _update_hosts,
2175                         .get_my_id = _get_my_id,
2176                         .set_my_id = _set_my_id,
2177                         .get_other_id = _get_other_id,
2178                         .set_other_id = _set_other_id,
2179                         .get_other_eap_id = _get_other_eap_id,
2180                         .enable_extension = _enable_extension,
2181                         .supports_extension = _supports_extension,
2182                         .set_condition = _set_condition,
2183                         .has_condition = _has_condition,
2184                         .set_pending_updates = _set_pending_updates,
2185                         .get_pending_updates = _get_pending_updates,
2186                         .create_peer_address_enumerator = _create_peer_address_enumerator,
2187                         .add_peer_address = _add_peer_address,
2188                         .clear_peer_addresses = _clear_peer_addresses,
2189                         .has_mapping_changed = _has_mapping_changed,
2190                         .retransmit = _retransmit,
2191                         .delete = _delete_,
2192                         .destroy = _destroy,
2193                         .send_dpd = _send_dpd,
2194                         .send_keepalive = _send_keepalive,
2195                         .get_keymat = _get_keymat,
2196                         .add_child_sa = _add_child_sa,
2197                         .get_child_sa = _get_child_sa,
2198                         .get_child_count = _get_child_count,
2199                         .create_child_sa_enumerator = _create_child_sa_enumerator,
2200                         .remove_child_sa = _remove_child_sa,
2201                         .rekey_child_sa = _rekey_child_sa,
2202                         .delete_child_sa = _delete_child_sa,
2203                         .destroy_child_sa = _destroy_child_sa,
2204                         .rekey = _rekey,
2205                         .reauth = _reauth,
2206                         .reestablish = _reestablish,
2207                         .set_auth_lifetime = _set_auth_lifetime,
2208                         .roam = _roam,
2209                         .inherit = _inherit,
2210                         .generate_message = _generate_message,
2211                         .reset = _reset,
2212                         .get_unique_id = _get_unique_id,
2213                         .add_virtual_ip = _add_virtual_ip,
2214                         .clear_virtual_ips = _clear_virtual_ips,
2215                         .create_virtual_ip_enumerator = _create_virtual_ip_enumerator,
2216                         .add_configuration_attribute = _add_configuration_attribute,
2217                         .set_kmaddress = _set_kmaddress,
2218                         .create_task_enumerator = _create_task_enumerator,
2219                         .flush_queue = _flush_queue,
2220                         .queue_task = _queue_task,
2221 #ifdef ME
2222                         .act_as_mediation_server = _act_as_mediation_server,
2223                         .get_server_reflexive_host = _get_server_reflexive_host,
2224                         .set_server_reflexive_host = _set_server_reflexive_host,
2225                         .get_connect_id = _get_connect_id,
2226                         .initiate_mediation = _initiate_mediation,
2227                         .initiate_mediated = _initiate_mediated,
2228                         .relay = _relay,
2229                         .callback = _callback,
2230                         .respond = _respond,
2231 #endif /* ME */
2232                 },
2233                 .ike_sa_id = ike_sa_id->clone(ike_sa_id),
2234                 .version = version,
2235                 .child_sas = linked_list_create(),
2236                 .my_host = host_create_any(AF_INET),
2237                 .other_host = host_create_any(AF_INET),
2238                 .my_id = identification_create_from_encoding(ID_ANY, chunk_empty),
2239                 .other_id = identification_create_from_encoding(ID_ANY, chunk_empty),
2240                 .keymat = keymat_create(version, initiator),
2241                 .state = IKE_CREATED,
2242                 .stats[STAT_INBOUND] = time_monotonic(NULL),
2243                 .stats[STAT_OUTBOUND] = time_monotonic(NULL),
2244                 .my_auth = auth_cfg_create(),
2245                 .other_auth = auth_cfg_create(),
2246                 .my_auths = linked_list_create(),
2247                 .other_auths = linked_list_create(),
2248                 .unique_id = ++unique_id,
2249                 .peer_addresses = linked_list_create(),
2250                 .my_vips = linked_list_create(),
2251                 .other_vips = linked_list_create(),
2252                 .attributes = linked_list_create(),
2253                 .keepalive_interval = lib->settings->get_time(lib->settings,
2254                                                         "%s.keep_alive", KEEPALIVE_INTERVAL, charon->name),
2255                 .retry_initiate_interval = lib->settings->get_time(lib->settings,
2256                                                         "%s.retry_initiate_interval", 0, charon->name),
2257                 .flush_auth_cfg = lib->settings->get_bool(lib->settings,
2258                                                         "%s.flush_auth_cfg", FALSE, charon->name),
2259         );
2260
2261         if (version == IKEV2)
2262         {       /* always supported with IKEv2 */
2263                 enable_extension(this, EXT_DPD);
2264         }
2265
2266         this->task_manager = task_manager_create(&this->public);
2267         this->my_host->set_port(this->my_host,
2268                                                         charon->socket->get_port(charon->socket, FALSE));
2269
2270         if (!this->task_manager || !this->keymat)
2271         {
2272                 DBG1(DBG_IKE, "IKE version %d not supported", this->version);
2273                 destroy(this);
2274                 return NULL;
2275         }
2276         return &this->public;
2277 }