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
 579         if (this->state == IKE_PASSIVE)
 580         {
 581                 return INVALID_STATE;
 582         }
 583         delay = this->peer_cfg->get_dpd(this->peer_cfg);
 584         if (this->task_manager->busy(this->task_manager))
 585         {
 586                 /* an exchange is in the air, no need to start a DPD check */
 587                 diff = 0;
 588         }
 589         else
 590         {
 591                 /* check if there was any inbound traffic */
 592                 time_t last_in, now;
 593                 last_in = get_use_time(this, TRUE);
 594                 now = time_monotonic(NULL);
 595                 diff = now - last_in;
 596                 if (!delay || diff >= delay)
 597                 {
 598                         /* to long ago, initiate dead peer detection */
 599                         DBG1(DBG_IKE, "sending DPD request");
 600                         this->task_manager->queue_dpd(this->task_manager);
 601                         diff = 0;
 602                 }
 603         }
 604         /* recheck in "interval" seconds */
 605         if (delay)
 606         {
 607                 job = (job_t*)send_dpd_job_create(this->ike_sa_id);
 608                 lib->scheduler->schedule_job(lib->scheduler, job, delay - diff);
 609         }
 610         return this->task_manager->initiate(this->task_manager);
 611 }
 612
 613 METHOD(ike_sa_t, get_state, ike_sa_state_t,
 614         private_ike_sa_t *this)
 615 {
 616         return this->state;
 617 }
 618
 619 METHOD(ike_sa_t, set_state, void,
 620         private_ike_sa_t *this, ike_sa_state_t state)
 621 {
 622         bool trigger_dpd = FALSE;
 623
 624         DBG2(DBG_IKE, "IKE_SA %s[%d] state change: %N => %N",
 625                  get_name(this), this->unique_id,
 626                  ike_sa_state_names, this->state,
 627                  ike_sa_state_names, state);
 628
 629         switch (state)
 630         {
 631                 case IKE_ESTABLISHED:
 632                 {
 633                         if (this->state == IKE_CONNECTING ||
 634                                 this->state == IKE_PASSIVE)
 635                         {
 636                                 job_t *job;
 637                                 u_int32_t t;
 638
 639                                 /* calculate rekey, reauth and lifetime */
 640                                 this->stats[STAT_ESTABLISHED] = time_monotonic(NULL);
 641
 642                                 /* schedule rekeying if we have a time which is smaller than
 643                                  * an already scheduled rekeying */
 644                                 t = this->peer_cfg->get_rekey_time(this->peer_cfg, TRUE);
 645                                 if (t && (this->stats[STAT_REKEY] == 0 ||
 646                                         (this->stats[STAT_REKEY] > t + this->stats[STAT_ESTABLISHED])))
 647                                 {
 648                                         this->stats[STAT_REKEY] = t + this->stats[STAT_ESTABLISHED];
 649                                         job = (job_t*)rekey_ike_sa_job_create(this->ike_sa_id, FALSE);
 650                                         lib->scheduler->schedule_job(lib->scheduler, job, t);
 651                                         DBG1(DBG_IKE, "scheduling rekeying in %ds", t);
 652                                 }
 653                                 t = this->peer_cfg->get_reauth_time(this->peer_cfg, TRUE);
 654                                 if (t && (this->stats[STAT_REAUTH] == 0 ||
 655                                         (this->stats[STAT_REAUTH] > t + this->stats[STAT_ESTABLISHED])))
 656                                 {
 657                                         this->stats[STAT_REAUTH] = t + this->stats[STAT_ESTABLISHED];
 658                                         job = (job_t*)rekey_ike_sa_job_create(this->ike_sa_id, TRUE);
 659                                         lib->scheduler->schedule_job(lib->scheduler, job, t);
 660                                         DBG1(DBG_IKE, "scheduling reauthentication in %ds", t);
 661                                 }
 662                                 t = this->peer_cfg->get_over_time(this->peer_cfg);
 663                                 if (this->stats[STAT_REKEY] || this->stats[STAT_REAUTH])
 664                                 {
 665                                         if (this->stats[STAT_REAUTH] == 0)
 666                                         {
 667                                                 this->stats[STAT_DELETE] = this->stats[STAT_REKEY];
 668                                         }
 669                                         else if (this->stats[STAT_REKEY] == 0)
 670                                         {
 671                                                 this->stats[STAT_DELETE] = this->stats[STAT_REAUTH];
 672                                         }
 673                                         else
 674                                         {
 675                                                 this->stats[STAT_DELETE] = min(this->stats[STAT_REKEY],
 676                                                                                                            this->stats[STAT_REAUTH]);
 677                                         }
 678                                         this->stats[STAT_DELETE] += t;
 679                                         t = this->stats[STAT_DELETE] - this->stats[STAT_ESTABLISHED];
 680                                         job = (job_t*)delete_ike_sa_job_create(this->ike_sa_id, TRUE);
 681                                         lib->scheduler->schedule_job(lib->scheduler, job, t);
 682                                         DBG1(DBG_IKE, "maximum IKE_SA lifetime %ds", t);
 683                                 }
 684                                 trigger_dpd = this->peer_cfg->get_dpd(this->peer_cfg);
 685                         }
 686                         break;
 687                 }
 688                 default:
 689                         break;
 690         }
 691         charon->bus->ike_state_change(charon->bus, &this->public, state);
 692         this->state = state;
 693
 694         if (trigger_dpd)
 695         {
 696                 if (supports_extension(this, EXT_DPD))
 697                 {
 698                         send_dpd(this);
 699                 }
 700                 else
 701                 {
 702                         DBG1(DBG_IKE, "DPD not supported by peer, disabled");
 703                 }
 704         }
 705 }
 706
 707 METHOD(ike_sa_t, reset, void,
 708         private_ike_sa_t *this)
 709 {
 710         /*  the responder ID is reset, as peer may choose another one */
 711         if (this->ike_sa_id->is_initiator(this->ike_sa_id))
 712         {
 713                 this->ike_sa_id->set_responder_spi(this->ike_sa_id, 0);
 714         }
 715
 716         set_state(this, IKE_CREATED);
 717
 718         flush_auth_cfgs(this);
 719
 720         this->keymat->destroy(this->keymat);
 721         this->keymat = keymat_create(this->version,
 722                                                         this->ike_sa_id->is_initiator(this->ike_sa_id));
 723
 724         this->task_manager->reset(this->task_manager, 0, 0);
 725 }
 726
 727 METHOD(ike_sa_t, get_keymat, keymat_t*,
 728         private_ike_sa_t *this)
 729 {
 730         return this->keymat;
 731 }
 732
 733 METHOD(ike_sa_t, add_virtual_ip, void,
 734         private_ike_sa_t *this, bool local, host_t *ip)
 735 {
 736         if (local)
 737         {
 738                 DBG1(DBG_IKE, "installing new virtual IP %H", ip);
 739                 if (hydra->kernel_interface->add_ip(hydra->kernel_interface, ip,
 740                                                                                         this->my_host) == SUCCESS)
 741                 {
 742                         this->my_vips->insert_last(this->my_vips, ip->clone(ip));
 743                 }
 744                 else
 745                 {
 746                         DBG1(DBG_IKE, "installing virtual IP %H failed", ip);
 747                 }
 748         }
 749         else
 750         {
 751                 this->other_vips->insert_last(this->other_vips, ip->clone(ip));
 752         }
 753 }
 754
 755
 756 METHOD(ike_sa_t, clear_virtual_ips, void,
 757         private_ike_sa_t *this, bool local)
 758 {
 759         linked_list_t *vips = local ? this->my_vips : this->other_vips;
 760         host_t *vip;
 761
 762         while (vips->remove_first(vips, (void**)&vip) == SUCCESS)
 763         {
 764                 if (local)
 765                 {
 766                         hydra->kernel_interface->del_ip(hydra->kernel_interface, vip);
 767                 }
 768                 vip->destroy(vip);
 769         }
 770 }
 771
 772 METHOD(ike_sa_t, create_virtual_ip_enumerator, enumerator_t*,
 773         private_ike_sa_t *this, bool local)
 774 {
 775         if (local)
 776         {
 777                 return this->my_vips->create_enumerator(this->my_vips);
 778         }
 779         return this->other_vips->create_enumerator(this->other_vips);
 780 }
 781
 782 METHOD(ike_sa_t, add_peer_address, void,
 783         private_ike_sa_t *this, host_t *host)
 784 {
 785         this->peer_addresses->insert_last(this->peer_addresses, host);
 786 }
 787
 788 METHOD(ike_sa_t, create_peer_address_enumerator, enumerator_t*,
 789         private_ike_sa_t *this)
 790 {
 791         if (this->peer_addresses->get_count(this->peer_addresses))
 792         {
 793                 return this->peer_addresses->create_enumerator(this->peer_addresses);
 794         }
 795         /* in case we don't have MOBIKE */
 796         return enumerator_create_single(this->other_host, NULL);
 797 }
 798
 799 METHOD(ike_sa_t, clear_peer_addresses, void,
 800         private_ike_sa_t *this)
 801 {
 802         enumerator_t *enumerator;
 803         host_t *host;
 804
 805         enumerator = this->peer_addresses->create_enumerator(this->peer_addresses);
 806         while (enumerator->enumerate(enumerator, (void**)&host))
 807         {
 808                 this->peer_addresses->remove_at(this->peer_addresses,
 809                                                                                 enumerator);
 810                 host->destroy(host);
 811         }
 812         enumerator->destroy(enumerator);
 813 }
 814
 815 METHOD(ike_sa_t, has_mapping_changed, bool,
 816         private_ike_sa_t *this, chunk_t hash)
 817 {
 818         if (this->nat_detection_dest.ptr == NULL)
 819         {
 820                 this->nat_detection_dest = chunk_clone(hash);
 821                 return FALSE;
 822         }
 823         if (chunk_equals(hash, this->nat_detection_dest))
 824         {
 825                 return FALSE;
 826         }
 827         free(this->nat_detection_dest.ptr);
 828         this->nat_detection_dest = chunk_clone(hash);
 829         return TRUE;
 830 }
 831
 832 METHOD(ike_sa_t, set_pending_updates, void,
 833         private_ike_sa_t *this, u_int32_t updates)
 834 {
 835         this->pending_updates = updates;
 836 }
 837
 838 METHOD(ike_sa_t, get_pending_updates, u_int32_t,
 839         private_ike_sa_t *this)
 840 {
 841         return this->pending_updates;
 842 }
 843
 844 METHOD(ike_sa_t, float_ports, void,
 845            private_ike_sa_t *this)
 846 {
 847         /* do not switch if we have a custom port from MOBIKE/NAT */
 848         if (this->my_host->get_port(this->my_host) ==
 849                         charon->socket->get_port(charon->socket, FALSE))
 850         {
 851                 this->my_host->set_port(this->my_host,
 852                                                                 charon->socket->get_port(charon->socket, TRUE));
 853         }
 854         if (this->other_host->get_port(this->other_host) == IKEV2_UDP_PORT)
 855         {
 856                 this->other_host->set_port(this->other_host, IKEV2_NATT_PORT);
 857         }
 858 }
 859
 860 METHOD(ike_sa_t, update_hosts, void,
 861         private_ike_sa_t *this, host_t *me, host_t *other, bool force)
 862 {
 863         bool update = FALSE;
 864
 865         if (me == NULL)
 866         {
 867                 me = this->my_host;
 868         }
 869         if (other == NULL)
 870         {
 871                 other = this->other_host;
 872         }
 873
 874         /* apply hosts on first received message */
 875         if (this->my_host->is_anyaddr(this->my_host) ||
 876                 this->other_host->is_anyaddr(this->other_host))
 877         {
 878                 set_my_host(this, me->clone(me));
 879                 set_other_host(this, other->clone(other));
 880                 update = TRUE;
 881         }
 882         else
 883         {
 884                 /* update our address in any case */
 885                 if (!me->equals(me, this->my_host))
 886                 {
 887                         set_my_host(this, me->clone(me));
 888                         update = TRUE;
 889                 }
 890
 891                 if (!other->equals(other, this->other_host))
 892                 {
 893                         /* update others address if we are NOT NATed */
 894                         if (force || !has_condition(this, COND_NAT_HERE))
 895                         {
 896                                 set_other_host(this, other->clone(other));
 897                                 update = TRUE;
 898                         }
 899                 }
 900         }
 901
 902         /* update all associated CHILD_SAs, if required */
 903         if (update)
 904         {
 905                 enumerator_t *enumerator;
 906                 child_sa_t *child_sa;
 907
 908                 enumerator = this->child_sas->create_enumerator(this->child_sas);
 909                 while (enumerator->enumerate(enumerator, (void**)&child_sa))
 910                 {
 911                         if (child_sa->update(child_sa, this->my_host,
 912                                                 this->other_host, this->my_vips,
 913                                                 has_condition(this, COND_NAT_ANY)) == NOT_SUPPORTED)
 914                         {
 915                                 this->public.rekey_child_sa(&this->public,
 916                                                 child_sa->get_protocol(child_sa),
 917                                                 child_sa->get_spi(child_sa, TRUE));
 918                         }
 919                 }
 920                 enumerator->destroy(enumerator);
 921         }
 922 }
 923
 924 METHOD(ike_sa_t, generate_message, status_t,
 925         private_ike_sa_t *this, message_t *message, packet_t **packet)
 926 {
 927         status_t status;
 928
 929         if (message->is_encoded(message))
 930         {       /* already done */
 931                 *packet = message->get_packet(message);
 932                 return SUCCESS;
 933         }
 934         this->stats[STAT_OUTBOUND] = time_monotonic(NULL);
 935         message->set_ike_sa_id(message, this->ike_sa_id);
 936         charon->bus->message(charon->bus, message, FALSE, TRUE);
 937         status = message->generate(message, this->keymat, packet);
 938         if (status == SUCCESS)
 939         {
 940                 charon->bus->message(charon->bus, message, FALSE, FALSE);
 941         }
 942         return status;
 943 }
 944
 945 METHOD(ike_sa_t, set_kmaddress, void,
 946         private_ike_sa_t *this, host_t *local, host_t *remote)
 947 {
 948         DESTROY_IF(this->local_host);
 949         DESTROY_IF(this->remote_host);
 950         this->local_host = local->clone(local);
 951         this->remote_host = remote->clone(remote);
 952 }
 953
 954 #ifdef ME
 955 METHOD(ike_sa_t, act_as_mediation_server, void,
 956         private_ike_sa_t *this)
 957 {
 958         charon->mediation_manager->update_sa_id(charon->mediation_manager,
 959                         this->other_id, this->ike_sa_id);
 960         this->is_mediation_server = TRUE;
 961 }
 962
 963 METHOD(ike_sa_t, get_server_reflexive_host, host_t*,
 964         private_ike_sa_t *this)
 965 {
 966         return this->server_reflexive_host;
 967 }
 968
 969 METHOD(ike_sa_t, set_server_reflexive_host, void,
 970         private_ike_sa_t *this, host_t *host)
 971 {
 972         DESTROY_IF(this->server_reflexive_host);
 973         this->server_reflexive_host = host;
 974 }
 975
 976 METHOD(ike_sa_t, get_connect_id, chunk_t,
 977         private_ike_sa_t *this)
 978 {
 979         return this->connect_id;
 980 }
 981
 982 METHOD(ike_sa_t, respond, status_t,
 983         private_ike_sa_t *this, identification_t *peer_id, chunk_t connect_id)
 984 {
 985         ike_me_t *task = ike_me_create(&this->public, TRUE);
 986         task->respond(task, peer_id, connect_id);
 987         this->task_manager->queue_task(this->task_manager, (task_t*)task);
 988         return this->task_manager->initiate(this->task_manager);
 989 }
 990
 991 METHOD(ike_sa_t, callback, status_t,
 992         private_ike_sa_t *this, identification_t *peer_id)
 993 {
 994         ike_me_t *task = ike_me_create(&this->public, TRUE);
 995         task->callback(task, peer_id);
 996         this->task_manager->queue_task(this->task_manager, (task_t*)task);
 997         return this->task_manager->initiate(this->task_manager);
 998 }
 999
1000 METHOD(ike_sa_t, relay, status_t,
1001         private_ike_sa_t *this, identification_t *requester, chunk_t connect_id,
1002         chunk_t connect_key, linked_list_t *endpoints, bool response)
1003 {
1004         ike_me_t *task = ike_me_create(&this->public, TRUE);
1005         task->relay(task, requester, connect_id, connect_key, endpoints, response);
1006         this->task_manager->queue_task(this->task_manager, (task_t*)task);
1007         return this->task_manager->initiate(this->task_manager);
1008 }
1009
1010 METHOD(ike_sa_t, initiate_mediation, status_t,
1011         private_ike_sa_t *this, peer_cfg_t *mediated_cfg)
1012 {
1013         ike_me_t *task = ike_me_create(&this->public, TRUE);
1014         task->connect(task, mediated_cfg->get_peer_id(mediated_cfg));
1015         this->task_manager->queue_task(this->task_manager, (task_t*)task);
1016         return this->task_manager->initiate(this->task_manager);
1017 }
1018
1019 METHOD(ike_sa_t, initiate_mediated, status_t,
1020         private_ike_sa_t *this, host_t *me, host_t *other, chunk_t connect_id)
1021 {
1022         set_my_host(this, me->clone(me));
1023         set_other_host(this, other->clone(other));
1024         chunk_free(&this->connect_id);
1025         this->connect_id = chunk_clone(connect_id);
1026         return this->task_manager->initiate(this->task_manager);
1027 }
1028 #endif /* ME */
1029
1030 /**
1031  * Resolve DNS host in configuration
1032  */
1033 static void resolve_hosts(private_ike_sa_t *this)
1034 {
1035         host_t *host;
1036
1037         if (this->remote_host)
1038         {
1039                 host = this->remote_host->clone(this->remote_host);
1040                 host->set_port(host, IKEV2_UDP_PORT);
1041         }
1042         else
1043         {
1044                 char *other_addr;
1045                 u_int16_t other_port;
1046
1047                 other_addr = this->ike_cfg->get_other_addr(this->ike_cfg, NULL);
1048                 other_port = this->ike_cfg->get_other_port(this->ike_cfg);
1049                 host = host_create_from_dns(other_addr, 0, other_port);
1050         }
1051         if (host)
1052         {
1053                 set_other_host(this, host);
1054         }
1055
1056         if (this->local_host)
1057         {
1058                 host = this->local_host->clone(this->local_host);
1059                 host->set_port(host, charon->socket->get_port(charon->socket, FALSE));
1060         }
1061         else
1062         {
1063                 char *my_addr;
1064                 u_int16_t my_port;
1065                 int family = 0;
1066
1067                 /* use same address family as for other */
1068                 if (!this->other_host->is_anyaddr(this->other_host))
1069                 {
1070                         family = this->other_host->get_family(this->other_host);
1071                 }
1072                 my_addr = this->ike_cfg->get_my_addr(this->ike_cfg, NULL);
1073                 my_port = this->ike_cfg->get_my_port(this->ike_cfg);
1074                 host = host_create_from_dns(my_addr, family, my_port);
1075
1076                 if (host && host->is_anyaddr(host) &&
1077                         !this->other_host->is_anyaddr(this->other_host))
1078                 {
1079                         host->destroy(host);
1080                         host = hydra->kernel_interface->get_source_addr(
1081                                                         hydra->kernel_interface, this->other_host, NULL);
1082                         if (host)
1083                         {
1084                                 host->set_port(host, this->ike_cfg->get_my_port(this->ike_cfg));
1085                         }
1086                         else
1087                         {       /* fallback to address family specific %any(6), if configured */
1088                                 host = host_create_from_dns(my_addr, 0, my_port);
1089                         }
1090                 }
1091         }
1092         if (host)
1093         {
1094                 set_my_host(this, host);
1095         }
1096 }
1097
1098 METHOD(ike_sa_t, initiate, status_t,
1099         private_ike_sa_t *this, child_cfg_t *child_cfg, u_int32_t reqid,
1100         traffic_selector_t *tsi, traffic_selector_t *tsr)
1101 {
1102         bool defer_initiate = FALSE;
1103
1104         if (this->state == IKE_CREATED)
1105         {
1106                 if (this->my_host->is_anyaddr(this->my_host) ||
1107                         this->other_host->is_anyaddr(this->other_host))
1108                 {
1109                         resolve_hosts(this);
1110                 }
1111
1112                 if (this->other_host->is_anyaddr(this->other_host)
1113 #ifdef ME
1114                         && !this->peer_cfg->get_mediated_by(this->peer_cfg)
1115 #endif /* ME */
1116                         )
1117                 {
1118                         char *addr = this->ike_cfg->get_other_addr(this->ike_cfg, NULL);
1119                         bool is_anyaddr = streq(addr, "%any") || streq(addr, "%any6");
1120
1121                         if (is_anyaddr || !this->retry_initiate_interval)
1122                         {
1123                                 if (is_anyaddr)
1124                                 {
1125                                         DBG1(DBG_IKE, "unable to initiate to %s", addr);
1126                                 }
1127                                 else
1128                                 {
1129                                         DBG1(DBG_IKE, "unable to resolve %s, initiate aborted",
1130                                                  addr);
1131                                 }
1132                                 DESTROY_IF(child_cfg);
1133                                 charon->bus->alert(charon->bus, ALERT_PEER_ADDR_FAILED);
1134                                 return DESTROY_ME;
1135                         }
1136                         DBG1(DBG_IKE, "unable to resolve %s, retrying in %ds",
1137                                  addr, this->retry_initiate_interval);
1138                         defer_initiate = TRUE;
1139                 }
1140
1141                 set_condition(this, COND_ORIGINAL_INITIATOR, TRUE);
1142                 this->task_manager->queue_ike(this->task_manager);
1143         }
1144
1145 #ifdef ME
1146         if (this->peer_cfg->is_mediation(this->peer_cfg))
1147         {
1148                 if (this->state == IKE_ESTABLISHED)
1149                 {
1150                         /* mediation connection is already established, retrigger state
1151                          * change to notify bus listeners */
1152                         DBG1(DBG_IKE, "mediation connection is already up");
1153                         set_state(this, IKE_ESTABLISHED);
1154                 }
1155                 DESTROY_IF(child_cfg);
1156         }
1157         else
1158 #endif /* ME */
1159         if (child_cfg)
1160         {
1161                 /* normal IKE_SA with CHILD_SA */
1162                 this->task_manager->queue_child(this->task_manager, child_cfg, reqid,
1163                                                                                 tsi, tsr);
1164 #ifdef ME
1165                 if (this->peer_cfg->get_mediated_by(this->peer_cfg))
1166                 {
1167                         /* mediated connection, initiate mediation process */
1168                         job_t *job = (job_t*)initiate_mediation_job_create(this->ike_sa_id);
1169                         lib->processor->queue_job(lib->processor, job);
1170                         return SUCCESS;
1171                 }
1172 #endif /* ME */
1173         }
1174
1175         if (defer_initiate)
1176         {
1177                 if (!this->retry_initiate_queued)
1178                 {
1179                         job_t *job = (job_t*)retry_initiate_job_create(this->ike_sa_id);
1180                         lib->scheduler->schedule_job(lib->scheduler, (job_t*)job,
1181                                                                                  this->retry_initiate_interval);
1182                         this->retry_initiate_queued = TRUE;
1183                 }
1184                 return SUCCESS;
1185         }
1186         this->retry_initiate_queued = FALSE;
1187         return this->task_manager->initiate(this->task_manager);
1188 }
1189
1190 METHOD(ike_sa_t, retry_initiate, status_t,
1191         private_ike_sa_t *this)
1192 {
1193         if (this->retry_initiate_queued)
1194         {
1195                 this->retry_initiate_queued = FALSE;
1196                 return initiate(this, NULL, 0, NULL, NULL);
1197         }
1198         return SUCCESS;
1199 }
1200
1201 METHOD(ike_sa_t, process_message, status_t,
1202         private_ike_sa_t *this, message_t *message)
1203 {
1204         status_t status;
1205
1206         if (this->state == IKE_PASSIVE)
1207         {       /* do not handle messages in passive state */
1208                 return FAILED;
1209         }
1210         switch (message->get_exchange_type(message))
1211         {
1212                 case ID_PROT:
1213                 case AGGRESSIVE:
1214                 case IKE_SA_INIT:
1215                 case IKE_AUTH:
1216                         if (this->state != IKE_CREATED &&
1217                                 this->state != IKE_CONNECTING)
1218                         {
1219                                 DBG1(DBG_IKE, "ignoring %N in established IKE_SA state",
1220                                          exchange_type_names, message->get_exchange_type(message));
1221                                 return FAILED;
1222                         }
1223                         break;
1224                 default:
1225                         break;
1226         }
1227         if (message->get_major_version(message) != this->version)
1228         {
1229                 DBG1(DBG_IKE, "ignoring %N IKEv%u exchange on %N SA",
1230                          exchange_type_names, message->get_exchange_type(message),
1231                          message->get_major_version(message),
1232                          ike_version_names, this->version);
1233                 /* TODO-IKEv1: fall back to IKEv1 if we receive an IKEv1
1234                  * INVALID_MAJOR_VERSION on an IKEv2 SA. */
1235                 return FAILED;
1236         }
1237         status = this->task_manager->process_message(this->task_manager, message);
1238         if (this->flush_auth_cfg && this->state == IKE_ESTABLISHED)
1239         {
1240                 /* authentication completed */
1241                 this->flush_auth_cfg = FALSE;
1242                 flush_auth_cfgs(this);
1243         }
1244         return status;
1245 }
1246
1247 METHOD(ike_sa_t, get_id, ike_sa_id_t*,
1248         private_ike_sa_t *this)
1249 {
1250         return this->ike_sa_id;
1251 }
1252
1253 METHOD(ike_sa_t, get_version, ike_version_t,
1254         private_ike_sa_t *this)
1255 {
1256         return this->version;
1257 }
1258
1259 METHOD(ike_sa_t, get_my_id, identification_t*,
1260         private_ike_sa_t *this)
1261 {
1262         return this->my_id;
1263 }
1264
1265 METHOD(ike_sa_t, set_my_id, void,
1266         private_ike_sa_t *this, identification_t *me)
1267 {
1268         DESTROY_IF(this->my_id);
1269         this->my_id = me;
1270 }
1271
1272 METHOD(ike_sa_t, get_other_id, identification_t*,
1273         private_ike_sa_t *this)
1274 {
1275         return this->other_id;
1276 }
1277
1278 METHOD(ike_sa_t, get_other_eap_id, identification_t*,
1279         private_ike_sa_t *this)
1280 {
1281         identification_t *id = NULL, *current;
1282         enumerator_t *enumerator;
1283         auth_cfg_t *cfg;
1284
1285         enumerator = this->other_auths->create_enumerator(this->other_auths);
1286         while (enumerator->enumerate(enumerator, &cfg))
1287         {
1288                 /* prefer EAP-Identity of last round */
1289                 current = cfg->get(cfg, AUTH_RULE_EAP_IDENTITY);
1290                 if (!current || current->get_type(current) == ID_ANY)
1291                 {
1292                         current = cfg->get(cfg, AUTH_RULE_XAUTH_IDENTITY);
1293                 }
1294                 if (!current || current->get_type(current) == ID_ANY)
1295                 {
1296                         current = cfg->get(cfg, AUTH_RULE_IDENTITY);
1297                 }
1298                 if (current && current->get_type(current) != ID_ANY)
1299                 {
1300                         id = current;
1301                         continue;
1302                 }
1303         }
1304         enumerator->destroy(enumerator);
1305         if (id)
1306         {
1307                 return id;
1308         }
1309         return this->other_id;
1310 }
1311
1312 METHOD(ike_sa_t, set_other_id, void,
1313         private_ike_sa_t *this, identification_t *other)
1314 {
1315         DESTROY_IF(this->other_id);
1316         this->other_id = other;
1317 }
1318
1319 METHOD(ike_sa_t, add_child_sa, void,
1320         private_ike_sa_t *this, child_sa_t *child_sa)
1321 {
1322         this->child_sas->insert_last(this->child_sas, child_sa);
1323 }
1324
1325 METHOD(ike_sa_t, get_child_sa, child_sa_t*,
1326         private_ike_sa_t *this, protocol_id_t protocol, u_int32_t spi, bool inbound)
1327 {
1328         enumerator_t *enumerator;
1329         child_sa_t *current, *found = NULL;
1330
1331         enumerator = this->child_sas->create_enumerator(this->child_sas);
1332         while (enumerator->enumerate(enumerator, (void**)&current))
1333         {
1334                 if (current->get_spi(current, inbound) == spi &&
1335                         current->get_protocol(current) == protocol)
1336                 {
1337                         found = current;
1338                 }
1339         }
1340         enumerator->destroy(enumerator);
1341         return found;
1342 }
1343
1344 METHOD(ike_sa_t, get_child_count, int,
1345         private_ike_sa_t *this)
1346 {
1347         return this->child_sas->get_count(this->child_sas);
1348 }
1349
1350 METHOD(ike_sa_t, create_child_sa_enumerator, enumerator_t*,
1351         private_ike_sa_t *this)
1352 {
1353         return this->child_sas->create_enumerator(this->child_sas);
1354 }
1355
1356 METHOD(ike_sa_t, remove_child_sa, void,
1357         private_ike_sa_t *this, enumerator_t *enumerator)
1358 {
1359         this->child_sas->remove_at(this->child_sas, enumerator);
1360 }
1361
1362 METHOD(ike_sa_t, rekey_child_sa, status_t,
1363         private_ike_sa_t *this, protocol_id_t protocol, u_int32_t spi)
1364 {
1365         if (this->state == IKE_PASSIVE)
1366         {
1367                 return INVALID_STATE;
1368         }
1369         this->task_manager->queue_child_rekey(this->task_manager, protocol, spi);
1370         return this->task_manager->initiate(this->task_manager);
1371 }
1372
1373 METHOD(ike_sa_t, delete_child_sa, status_t,
1374         private_ike_sa_t *this, protocol_id_t protocol, u_int32_t spi, bool expired)
1375 {
1376         if (this->state == IKE_PASSIVE)
1377         {
1378                 return INVALID_STATE;
1379         }
1380         this->task_manager->queue_child_delete(this->task_manager,
1381                                                                                    protocol, spi, expired);
1382         return this->task_manager->initiate(this->task_manager);
1383 }
1384
1385 METHOD(ike_sa_t, destroy_child_sa, status_t,
1386         private_ike_sa_t *this, protocol_id_t protocol, u_int32_t spi)
1387 {
1388         enumerator_t *enumerator;
1389         child_sa_t *child_sa;
1390         status_t status = NOT_FOUND;
1391
1392         enumerator = this->child_sas->create_enumerator(this->child_sas);
1393         while (enumerator->enumerate(enumerator, (void**)&child_sa))
1394         {
1395                 if (child_sa->get_protocol(child_sa) == protocol &&
1396                         child_sa->get_spi(child_sa, TRUE) == spi)
1397                 {
1398                         this->child_sas->remove_at(this->child_sas, enumerator);
1399                         child_sa->destroy(child_sa);
1400                         status = SUCCESS;
1401                         break;
1402                 }
1403         }
1404         enumerator->destroy(enumerator);
1405         return status;
1406 }
1407
1408 METHOD(ike_sa_t, delete_, status_t,
1409         private_ike_sa_t *this)
1410 {
1411         switch (this->state)
1412         {
1413                 case IKE_REKEYING:
1414                         if (this->version == IKEV1)
1415                         {       /* SA has been reauthenticated, delete */
1416                                 charon->bus->ike_updown(charon->bus, &this->public, FALSE);
1417                                 break;
1418                         }
1419                         /* FALL */
1420                 case IKE_ESTABLISHED:
1421                         this->task_manager->queue_ike_delete(this->task_manager);
1422                         return this->task_manager->initiate(this->task_manager);
1423                 case IKE_CREATED:
1424                         DBG1(DBG_IKE, "deleting unestablished IKE_SA");
1425                         break;
1426                 case IKE_PASSIVE:
1427                         break;
1428                 default:
1429                         DBG1(DBG_IKE, "destroying IKE_SA in state %N "
1430                                 "without notification", ike_sa_state_names, this->state);
1431                         charon->bus->ike_updown(charon->bus, &this->public, FALSE);
1432                         break;
1433         }
1434         return DESTROY_ME;
1435 }
1436
1437 METHOD(ike_sa_t, rekey, status_t,
1438         private_ike_sa_t *this)
1439 {
1440         if (this->state == IKE_PASSIVE)
1441         {
1442                 return INVALID_STATE;
1443         }
1444         this->task_manager->queue_ike_rekey(this->task_manager);
1445         return this->task_manager->initiate(this->task_manager);
1446 }
1447
1448 METHOD(ike_sa_t, reauth, status_t,
1449         private_ike_sa_t *this)
1450 {
1451         if (this->state == IKE_PASSIVE)
1452         {
1453                 return INVALID_STATE;
1454         }
1455         /* we can't reauthenticate as responder when we use EAP or virtual IPs.
1456          * If the peer does not support RFC4478, there is no way to keep the
1457          * IKE_SA up. */
1458         if (!has_condition(this, COND_ORIGINAL_INITIATOR))
1459         {
1460                 DBG1(DBG_IKE, "initiator did not reauthenticate as requested");
1461                 if (this->other_vips->get_count(this->other_vips) != 0 ||
1462                         has_condition(this, COND_XAUTH_AUTHENTICATED) ||
1463                         has_condition(this, COND_EAP_AUTHENTICATED)
1464 #ifdef ME
1465                         /* as mediation server we too cannot reauth the IKE_SA */
1466                         || this->is_mediation_server
1467 #endif /* ME */
1468                         )
1469                 {
1470                         time_t del, now;
1471
1472                         del = this->stats[STAT_DELETE];
1473                         now = time_monotonic(NULL);
1474                         DBG1(DBG_IKE, "IKE_SA %s[%d] will timeout in %V",
1475                                  get_name(this), this->unique_id, &now, &del);
1476                         return FAILED;
1477                 }
1478                 else
1479                 {
1480                         DBG0(DBG_IKE, "reauthenticating IKE_SA %s[%d] actively",
1481                                  get_name(this), this->unique_id);
1482                 }
1483         }
1484         else
1485         {
1486                 DBG0(DBG_IKE, "reauthenticating IKE_SA %s[%d]",
1487                          get_name(this), this->unique_id);
1488         }
1489         set_condition(this, COND_REAUTHENTICATING, TRUE);
1490         this->task_manager->queue_ike_reauth(this->task_manager);
1491         return this->task_manager->initiate(this->task_manager);
1492 }
1493
1494 METHOD(ike_sa_t, reestablish, status_t,
1495         private_ike_sa_t *this)
1496 {
1497         ike_sa_t *new;
1498         host_t *host;
1499         action_t action;
1500         enumerator_t *enumerator;
1501         child_sa_t *child_sa;
1502         child_cfg_t *child_cfg;
1503         bool restart = FALSE;
1504         status_t status = FAILED;
1505
1506         if (has_condition(this, COND_REAUTHENTICATING))
1507         {       /* only reauthenticate if we have children */
1508                 if (this->child_sas->get_count(this->child_sas) == 0
1509 #ifdef ME
1510                         /* allow reauth of mediation connections without CHILD_SAs */
1511                         && !this->peer_cfg->is_mediation(this->peer_cfg)
1512 #endif /* ME */
1513                         )
1514                 {
1515                         DBG1(DBG_IKE, "unable to reauthenticate IKE_SA, no CHILD_SA "
1516                                  "to recreate");
1517                 }
1518                 else
1519                 {
1520                         restart = TRUE;
1521                 }
1522         }
1523         else
1524         {       /* check if we have children to keep up at all */
1525                 enumerator = this->child_sas->create_enumerator(this->child_sas);
1526                 while (enumerator->enumerate(enumerator, (void**)&child_sa))
1527                 {
1528                         if (this->state == IKE_DELETING)
1529                         {
1530                                 action = child_sa->get_close_action(child_sa);
1531                         }
1532                         else
1533                         {
1534                                 action = child_sa->get_dpd_action(child_sa);
1535                         }
1536                         switch (action)
1537                         {
1538                                 case ACTION_RESTART:
1539                                         restart = TRUE;
1540                                         break;
1541                                 case ACTION_ROUTE:
1542                                         charon->traps->install(charon->traps, this->peer_cfg,
1543                                                                                    child_sa->get_config(child_sa));
1544                                         break;
1545                                 default:
1546                                         break;
1547                         }
1548                 }
1549                 enumerator->destroy(enumerator);
1550 #ifdef ME
1551                 /* mediation connections have no children, keep them up anyway */
1552                 if (this->peer_cfg->is_mediation(this->peer_cfg))
1553                 {
1554                         restart = TRUE;
1555                 }
1556 #endif /* ME */
1557         }
1558         if (!restart)
1559         {
1560                 return FAILED;
1561         }
1562
1563         /* check if we are able to reestablish this IKE_SA */
1564         if (!has_condition(this, COND_ORIGINAL_INITIATOR) &&
1565                 (this->other_vips->get_count(this->other_vips) != 0 ||
1566                  has_condition(this, COND_EAP_AUTHENTICATED)
1567 #ifdef ME
1568                  || this->is_mediation_server
1569 #endif /* ME */
1570                 ))
1571         {
1572                 DBG1(DBG_IKE, "unable to reestablish IKE_SA due to asymmetric setup");
1573                 return FAILED;
1574         }
1575
1576         new = charon->ike_sa_manager->checkout_new(charon->ike_sa_manager,
1577                                                                                            this->version, TRUE);
1578         if (!new)
1579         {
1580                 return FAILED;
1581         }
1582         new->set_peer_cfg(new, this->peer_cfg);
1583         host = this->other_host;
1584         new->set_other_host(new, host->clone(host));
1585         host = this->my_host;
1586         new->set_my_host(new, host->clone(host));
1587         /* if we already have a virtual IP, we reuse it */
1588         enumerator = this->my_vips->create_enumerator(this->my_vips);
1589         while (enumerator->enumerate(enumerator, &host))
1590         {
1591                 new->add_virtual_ip(new, TRUE, host);
1592         }
1593         enumerator->destroy(enumerator);
1594
1595 #ifdef ME
1596         if (this->peer_cfg->is_mediation(this->peer_cfg))
1597         {
1598                 status = new->initiate(new, NULL, 0, NULL, NULL);
1599         }
1600         else
1601 #endif /* ME */
1602         {
1603                 enumerator = this->child_sas->create_enumerator(this->child_sas);
1604                 while (enumerator->enumerate(enumerator, (void**)&child_sa))
1605                 {
1606                         if (has_condition(this, COND_REAUTHENTICATING))
1607                         {
1608                                 switch (child_sa->get_state(child_sa))
1609                                 {
1610                                         case CHILD_ROUTED:
1611                                         {       /* move routed child directly */
1612                                                 this->child_sas->remove_at(this->child_sas, enumerator);
1613                                                 new->add_child_sa(new, child_sa);
1614                                                 action = ACTION_NONE;
1615                                                 break;
1616                                         }
1617                                         default:
1618                                         {       /* initiate/queue all other CHILD_SAs */
1619                                                 action = ACTION_RESTART;
1620                                                 break;
1621                                         }
1622                                 }
1623                         }
1624                         else
1625                         {       /* only restart CHILD_SAs that are configured accordingly */
1626                                 if (this->state == IKE_DELETING)
1627                                 {
1628                                         action = child_sa->get_close_action(child_sa);
1629                                 }
1630                                 else
1631                                 {
1632                                         action = child_sa->get_dpd_action(child_sa);
1633                                 }
1634                         }
1635                         switch (action)
1636                         {
1637                                 case ACTION_RESTART:
1638                                         child_cfg = child_sa->get_config(child_sa);
1639                                         DBG1(DBG_IKE, "restarting CHILD_SA %s",
1640                                                  child_cfg->get_name(child_cfg));
1641                                         child_cfg->get_ref(child_cfg);
1642                                         status = new->initiate(new, child_cfg, 0, NULL, NULL);
1643                                         break;
1644                                 default:
1645                                         continue;
1646                         }
1647                         if (status == DESTROY_ME)
1648                         {
1649                                 break;
1650                         }
1651                 }
1652                 enumerator->destroy(enumerator);
1653         }
1654
1655         if (status == DESTROY_ME)
1656         {
1657                 charon->ike_sa_manager->checkin_and_destroy(charon->ike_sa_manager, new);
1658                 status = FAILED;
1659         }
1660         else
1661         {
1662                 charon->bus->ike_reestablish(charon->bus, &this->public, new);
1663                 charon->ike_sa_manager->checkin(charon->ike_sa_manager, new);
1664                 status = SUCCESS;
1665         }
1666         charon->bus->set_sa(charon->bus, &this->public);
1667         return status;
1668 }
1669
1670 METHOD(ike_sa_t, retransmit, status_t,
1671         private_ike_sa_t *this, u_int32_t message_id)
1672 {
1673         if (this->state == IKE_PASSIVE)
1674         {
1675                 return INVALID_STATE;
1676         }
1677         this->stats[STAT_OUTBOUND] = time_monotonic(NULL);
1678         if (this->task_manager->retransmit(this->task_manager, message_id) != SUCCESS)
1679         {
1680                 /* send a proper signal to brief interested bus listeners */
1681                 switch (this->state)
1682                 {
1683                         case IKE_CONNECTING:
1684                         {
1685                                 /* retry IKE_SA_INIT/Main Mode if we have multiple keyingtries */
1686                                 u_int32_t tries = this->peer_cfg->get_keyingtries(this->peer_cfg);
1687                                 this->keyingtry++;
1688                                 if (tries == 0 || tries > this->keyingtry)
1689                                 {
1690                                         DBG1(DBG_IKE, "peer not responding, trying again (%d/%d)",
1691                                                  this->keyingtry + 1, tries);
1692                                         reset(this);
1693                                         resolve_hosts(this);
1694                                         this->task_manager->queue_ike(this->task_manager);
1695                                         return this->task_manager->initiate(this->task_manager);
1696                                 }
1697                                 DBG1(DBG_IKE, "establishing IKE_SA failed, peer not responding");
1698                                 break;
1699                         }
1700                         case IKE_DELETING:
1701                                 DBG1(DBG_IKE, "proper IKE_SA delete failed, peer not responding");
1702                                 if (has_condition(this, COND_REAUTHENTICATING))
1703                                 {
1704                                         DBG1(DBG_IKE, "delete during reauthentication failed, "
1705                                                  "trying to reestablish IKE_SA anyway");
1706                                         reestablish(this);
1707                                 }
1708                                 break;
1709                         case IKE_REKEYING:
1710                                 DBG1(DBG_IKE, "rekeying IKE_SA failed, peer not responding");
1711                                 /* FALL */
1712                         default:
1713                                 reestablish(this);
1714                                 break;
1715                 }
1716                 return DESTROY_ME;
1717         }
1718         return SUCCESS;
1719 }
1720
1721 METHOD(ike_sa_t, set_auth_lifetime, status_t,
1722         private_ike_sa_t *this, u_int32_t lifetime)
1723 {
1724         u_int32_t diff, hard, soft, now;
1725         ike_auth_lifetime_t *task;
1726         bool send_update;
1727
1728         diff = this->peer_cfg->get_over_time(this->peer_cfg);
1729         now = time_monotonic(NULL);
1730         hard = now + lifetime;
1731         soft = hard - diff;
1732
1733         /* check if we have to send an AUTH_LIFETIME to enforce the new lifetime.
1734          * We send the notify in IKE_AUTH if not yet ESTABLISHED. */
1735         send_update = this->state == IKE_ESTABLISHED && this->version == IKEV2 &&
1736                                   !has_condition(this, COND_ORIGINAL_INITIATOR) &&
1737                                   (this->other_vips->get_count(this->other_vips) != 0 ||
1738                                   has_condition(this, COND_EAP_AUTHENTICATED));
1739
1740         if (lifetime < diff)
1741         {
1742                 this->stats[STAT_REAUTH] = now;
1743
1744                 if (!send_update)
1745                 {
1746                         DBG1(DBG_IKE, "received AUTH_LIFETIME of %ds, "
1747                                  "starting reauthentication", lifetime);
1748                         lib->processor->queue_job(lib->processor,
1749                                         (job_t*)rekey_ike_sa_job_create(this->ike_sa_id, TRUE));
1750                 }
1751         }
1752         else if (this->stats[STAT_REAUTH] == 0 ||
1753                          this->stats[STAT_REAUTH] > soft)
1754         {
1755                 this->stats[STAT_REAUTH] = soft;
1756                 if (!send_update)
1757                 {
1758                         DBG1(DBG_IKE, "received AUTH_LIFETIME of %ds, scheduling "
1759                                  "reauthentication in %ds", lifetime, lifetime - diff);
1760                         lib->scheduler->schedule_job(lib->scheduler,
1761                                                 (job_t*)rekey_ike_sa_job_create(this->ike_sa_id, TRUE),
1762                                                 lifetime - diff);
1763                 }
1764         }
1765         else
1766         {
1767                 DBG1(DBG_IKE, "received AUTH_LIFETIME of %ds, "
1768                          "reauthentication already scheduled in %ds", lifetime,
1769                          this->stats[STAT_REAUTH] - time_monotonic(NULL));
1770                 send_update = FALSE;
1771         }
1772         /* give at least some seconds to reauthenticate */
1773         this->stats[STAT_DELETE] = max(hard, now + 10);
1774
1775         if (send_update)
1776         {
1777                 task = ike_auth_lifetime_create(&this->public, TRUE);
1778                 this->task_manager->queue_task(this->task_manager, &task->task);
1779                 return this->task_manager->initiate(this->task_manager);
1780         }
1781         return SUCCESS;
1782 }
1783
1784 /**
1785  * Check if the current combination of source and destination address is still
1786  * valid.
1787  */
1788 static bool is_current_path_valid(private_ike_sa_t *this)
1789 {
1790         bool valid = FALSE;
1791         host_t *src;
1792         src = hydra->kernel_interface->get_source_addr(hydra->kernel_interface,
1793                                                                                         this->other_host, this->my_host);
1794         if (src)
1795         {
1796                 if (src->ip_equals(src, this->my_host))
1797                 {
1798                         valid = TRUE;
1799                 }
1800                 src->destroy(src);
1801         }
1802         return valid;
1803 }
1804
1805 /**
1806  * Check if we have any path avialable for this IKE SA.
1807  */
1808 static bool is_any_path_valid(private_ike_sa_t *this)
1809 {
1810         bool valid = FALSE;
1811         enumerator_t *enumerator;
1812         host_t *src = NULL, *addr;
1813
1814         DBG1(DBG_IKE, "old path is not available anymore, try to find another");
1815         enumerator = create_peer_address_enumerator(this);
1816         while (enumerator->enumerate(enumerator, &addr))
1817         {
1818                 DBG1(DBG_IKE, "looking for a route to %H ...", addr);
1819                 src = hydra->kernel_interface->get_source_addr(
1820                                                                                 hydra->kernel_interface, addr, NULL);
1821                 if (src)
1822                 {
1823                         break;
1824                 }
1825         }
1826         enumerator->destroy(enumerator);
1827         if (src)
1828         {
1829                 valid = TRUE;
1830                 src->destroy(src);
1831         }
1832         return valid;
1833 }
1834
1835 METHOD(ike_sa_t, roam, status_t,
1836         private_ike_sa_t *this, bool address)
1837 {
1838         switch (this->state)
1839         {
1840                 case IKE_CREATED:
1841                 case IKE_DELETING:
1842                 case IKE_DESTROYING:
1843                 case IKE_PASSIVE:
1844                         return SUCCESS;
1845                 default:
1846                         break;
1847         }
1848
1849         /* keep existing path if possible */
1850         if (is_current_path_valid(this))
1851         {
1852                 DBG2(DBG_IKE, "keeping connection path %H - %H",
1853                          this->my_host, this->other_host);
1854                 set_condition(this, COND_STALE, FALSE);
1855
1856                 if (supports_extension(this, EXT_MOBIKE) && address)
1857                 {       /* if any addresses changed, send an updated list */
1858                         DBG1(DBG_IKE, "sending address list update using MOBIKE");
1859                         this->task_manager->queue_mobike(this->task_manager, FALSE, TRUE);
1860                         return this->task_manager->initiate(this->task_manager);
1861                 }
1862                 return SUCCESS;
1863         }
1864
1865         if (!is_any_path_valid(this))
1866         {
1867                 DBG1(DBG_IKE, "no route found to reach %H, MOBIKE update deferred",
1868                          this->other_host);
1869                 set_condition(this, COND_STALE, TRUE);
1870                 return SUCCESS;
1871         }
1872         set_condition(this, COND_STALE, FALSE);
1873
1874         /* update addresses with mobike, if supported ... */
1875         if (supports_extension(this, EXT_MOBIKE))
1876         {
1877                 if (!has_condition(this, COND_ORIGINAL_INITIATOR))
1878                 {       /* responder updates the peer about changed address config */
1879                         DBG1(DBG_IKE, "sending address list update using MOBIKE, "
1880                                  "implicitly requesting an address change");
1881                         address = TRUE;
1882                 }
1883                 else
1884                 {
1885                         DBG1(DBG_IKE, "requesting address change using MOBIKE");
1886                 }
1887                 this->task_manager->queue_mobike(this->task_manager, TRUE, address);
1888                 return this->task_manager->initiate(this->task_manager);
1889         }
1890
1891         /* ... reauth if not */
1892         if (!has_condition(this, COND_ORIGINAL_INITIATOR))
1893         {       /* responder does not reauthenticate */
1894                 set_condition(this, COND_STALE, TRUE);
1895                 return SUCCESS;
1896         }
1897         DBG1(DBG_IKE, "reauthenticating IKE_SA due to address change");
1898         /* since our previous path is not valid anymore, try and find a new one */
1899         resolve_hosts(this);
1900         return reauth(this);
1901 }
1902
1903 METHOD(ike_sa_t, add_configuration_attribute, void,
1904         private_ike_sa_t *this, attribute_handler_t *handler,
1905         configuration_attribute_type_t type, chunk_t data)
1906 {
1907         attribute_entry_t *entry = malloc_thing(attribute_entry_t);
1908
1909         entry->handler = handler;
1910         entry->type = type;
1911         entry->data = chunk_clone(data);
1912
1913         this->attributes->insert_last(this->attributes, entry);
1914 }
1915
1916 METHOD(ike_sa_t, create_task_enumerator, enumerator_t*,
1917         private_ike_sa_t *this, task_queue_t queue)
1918 {
1919         return this->task_manager->create_task_enumerator(this->task_manager, queue);
1920 }
1921
1922 METHOD(ike_sa_t, flush_queue, void,
1923         private_ike_sa_t *this, task_queue_t queue)
1924 {
1925         this->task_manager->flush_queue(this->task_manager, queue);
1926 }
1927
1928 METHOD(ike_sa_t, queue_task, void,
1929         private_ike_sa_t *this, task_t *task)
1930 {
1931         this->task_manager->queue_task(this->task_manager, task);
1932 }
1933
1934 METHOD(ike_sa_t, inherit, void,
1935         private_ike_sa_t *this, ike_sa_t *other_public)
1936 {
1937         private_ike_sa_t *other = (private_ike_sa_t*)other_public;
1938         child_sa_t *child_sa;
1939         attribute_entry_t *entry;
1940         enumerator_t *enumerator;
1941         auth_cfg_t *cfg;
1942         host_t *vip;
1943
1944         /* apply hosts and ids */
1945         this->my_host->destroy(this->my_host);
1946         this->other_host->destroy(this->other_host);
1947         this->my_id->destroy(this->my_id);
1948         this->other_id->destroy(this->other_id);
1949         this->my_host = other->my_host->clone(other->my_host);
1950         this->other_host = other->other_host->clone(other->other_host);
1951         this->my_id = other->my_id->clone(other->my_id);
1952         this->other_id = other->other_id->clone(other->other_id);
1953
1954         /* apply assigned virtual IPs... */
1955         while (this->my_vips->remove_last(this->my_vips, (void**)&vip) == SUCCESS)
1956         {
1957                 other->my_vips->insert_first(other->my_vips, vip);
1958         }
1959         while (this->other_vips->remove_last(this->other_vips,
1960                                                                                  (void**)&vip) == SUCCESS)
1961         {
1962                 other->other_vips->insert_first(other->other_vips, vip);
1963         }
1964
1965         /* authentication information */
1966         enumerator = other->my_auths->create_enumerator(other->my_auths);
1967         while (enumerator->enumerate(enumerator, &cfg))
1968         {
1969                 this->my_auths->insert_last(this->my_auths, cfg->clone(cfg));
1970         }
1971         enumerator->destroy(enumerator);
1972         enumerator = other->other_auths->create_enumerator(other->other_auths);
1973         while (enumerator->enumerate(enumerator, &cfg))
1974         {
1975                 this->other_auths->insert_last(this->other_auths, cfg->clone(cfg));
1976         }
1977         enumerator->destroy(enumerator);
1978
1979         /* ... and configuration attributes */
1980         while (other->attributes->remove_last(other->attributes,
1981                                                                                   (void**)&entry) == SUCCESS)
1982         {
1983                 this->attributes->insert_first(this->attributes, entry);
1984         }
1985
1986         /* inherit all conditions */
1987         this->conditions = other->conditions;
1988         if (this->conditions & COND_NAT_HERE)
1989         {
1990                 send_keepalive(this);
1991         }
1992
1993 #ifdef ME
1994         if (other->is_mediation_server)
1995         {
1996                 act_as_mediation_server(this);
1997         }
1998         else if (other->server_reflexive_host)
1999         {
2000                 this->server_reflexive_host = other->server_reflexive_host->clone(
2001                                 other->server_reflexive_host);
2002         }
2003 #endif /* ME */
2004
2005         /* adopt all children */
2006         while (other->child_sas->remove_last(other->child_sas,
2007                                                                                  (void**)&child_sa) == SUCCESS)
2008         {
2009                 this->child_sas->insert_first(this->child_sas, (void*)child_sa);
2010         }
2011
2012         /* move pending tasks to the new IKE_SA */
2013         this->task_manager->adopt_tasks(this->task_manager, other->task_manager);
2014
2015         /* reauthentication timeout survives a rekeying */
2016         if (other->stats[STAT_REAUTH])
2017         {
2018                 time_t reauth, delete, now = time_monotonic(NULL);
2019
2020                 this->stats[STAT_REAUTH] = other->stats[STAT_REAUTH];
2021                 reauth = this->stats[STAT_REAUTH] - now;
2022                 delete = reauth + this->peer_cfg->get_over_time(this->peer_cfg);
2023                 this->stats[STAT_DELETE] = this->stats[STAT_REAUTH] + delete;
2024                 DBG1(DBG_IKE, "rescheduling reauthentication in %ds after rekeying, "
2025                          "lifetime reduced to %ds", reauth, delete);
2026                 lib->scheduler->schedule_job(lib->scheduler,
2027                                 (job_t*)rekey_ike_sa_job_create(this->ike_sa_id, TRUE), reauth);
2028                 lib->scheduler->schedule_job(lib->scheduler,
2029                                 (job_t*)delete_ike_sa_job_create(this->ike_sa_id, TRUE), delete);
2030         }
2031 }
2032
2033 METHOD(ike_sa_t, destroy, void,
2034         private_ike_sa_t *this)
2035 {
2036         attribute_entry_t *entry;
2037         host_t *vip;
2038
2039         charon->bus->set_sa(charon->bus, &this->public);
2040
2041         set_state(this, IKE_DESTROYING);
2042         DESTROY_IF(this->task_manager);
2043
2044         /* remove attributes first, as we pass the IKE_SA to the handler */
2045         while (this->attributes->remove_last(this->attributes,
2046                                                                                  (void**)&entry) == SUCCESS)
2047         {
2048                 hydra->attributes->release(hydra->attributes, entry->handler,
2049                                                                    this->other_id, entry->type, entry->data);
2050                 free(entry->data.ptr);
2051                 free(entry);
2052         }
2053         this->attributes->destroy(this->attributes);
2054
2055         this->child_sas->destroy_offset(this->child_sas, offsetof(child_sa_t, destroy));
2056
2057         /* unset SA after here to avoid usage by the listeners */
2058         charon->bus->set_sa(charon->bus, NULL);
2059
2060         DESTROY_IF(this->keymat);
2061
2062         while (this->my_vips->remove_last(this->my_vips, (void**)&vip) == SUCCESS)
2063         {
2064                 hydra->kernel_interface->del_ip(hydra->kernel_interface, vip);
2065                 vip->destroy(vip);
2066         }
2067         this->my_vips->destroy(this->my_vips);
2068         while (this->other_vips->remove_last(this->other_vips,
2069                                                                                  (void**)&vip) == SUCCESS)
2070         {
2071                 if (this->peer_cfg)
2072                 {
2073                         enumerator_t *enumerator;
2074                         char *pool;
2075
2076                         enumerator = this->peer_cfg->create_pool_enumerator(this->peer_cfg);
2077                         while (enumerator->enumerate(enumerator, &pool))
2078                         {
2079                                 if (hydra->attributes->release_address(hydra->attributes, pool,
2080                                                                                                 vip, get_other_eap_id(this)))
2081                                 {
2082                                         break;
2083                                 }
2084                         }
2085                         enumerator->destroy(enumerator);
2086                 }
2087                 vip->destroy(vip);
2088         }
2089         this->other_vips->destroy(this->other_vips);
2090         this->peer_addresses->destroy_offset(this->peer_addresses,
2091                                                                                  offsetof(host_t, destroy));
2092 #ifdef ME
2093         if (this->is_mediation_server)
2094         {
2095                 charon->mediation_manager->remove(charon->mediation_manager,
2096                                                                                   this->ike_sa_id);
2097         }
2098         DESTROY_IF(this->server_reflexive_host);
2099         chunk_free(&this->connect_id);
2100 #endif /* ME */
2101         free(this->nat_detection_dest.ptr);
2102
2103         DESTROY_IF(this->my_host);
2104         DESTROY_IF(this->other_host);
2105         DESTROY_IF(this->my_id);
2106         DESTROY_IF(this->other_id);
2107         DESTROY_IF(this->local_host);
2108         DESTROY_IF(this->remote_host);
2109
2110         DESTROY_IF(this->ike_cfg);
2111         DESTROY_IF(this->peer_cfg);
2112         DESTROY_IF(this->proposal);
2113         this->my_auth->destroy(this->my_auth);
2114         this->other_auth->destroy(this->other_auth);
2115         this->my_auths->destroy_offset(this->my_auths,
2116                                                                    offsetof(auth_cfg_t, destroy));
2117         this->other_auths->destroy_offset(this->other_auths,
2118                                                                           offsetof(auth_cfg_t, destroy));
2119
2120         this->ike_sa_id->destroy(this->ike_sa_id);
2121         free(this);
2122 }
2123
2124 /*
2125  * Described in header.
2126  */
2127 ike_sa_t * ike_sa_create(ike_sa_id_t *ike_sa_id, bool initiator,
2128                                                  ike_version_t version)
2129 {
2130         private_ike_sa_t *this;
2131         static u_int32_t unique_id = 0;
2132
2133         if (version == IKE_ANY)
2134         {       /* prefer IKEv2 if protocol not specified */
2135 #ifdef USE_IKEV2
2136                 version = IKEV2;
2137 #else
2138                 version = IKEV1;
2139 #endif
2140         }
2141
2142         INIT(this,
2143                 .public = {
2144                         .get_version = _get_version,
2145                         .get_state = _get_state,
2146                         .set_state = _set_state,
2147                         .get_name = _get_name,
2148                         .get_statistic = _get_statistic,
2149                         .set_statistic = _set_statistic,
2150                         .process_message = _process_message,
2151                         .initiate = _initiate,
2152                         .retry_initiate = _retry_initiate,
2153                         .get_ike_cfg = _get_ike_cfg,
2154                         .set_ike_cfg = _set_ike_cfg,
2155                         .get_peer_cfg = _get_peer_cfg,
2156                         .set_peer_cfg = _set_peer_cfg,
2157                         .get_auth_cfg = _get_auth_cfg,
2158                         .create_auth_cfg_enumerator = _create_auth_cfg_enumerator,
2159                         .add_auth_cfg = _add_auth_cfg,
2160                         .get_proposal = _get_proposal,
2161                         .set_proposal = _set_proposal,
2162                         .get_id = _get_id,
2163                         .get_my_host = _get_my_host,
2164                         .set_my_host = _set_my_host,
2165                         .get_other_host = _get_other_host,
2166                         .set_other_host = _set_other_host,
2167                         .set_message_id = _set_message_id,
2168                         .float_ports = _float_ports,
2169                         .update_hosts = _update_hosts,
2170                         .get_my_id = _get_my_id,
2171                         .set_my_id = _set_my_id,
2172                         .get_other_id = _get_other_id,
2173                         .set_other_id = _set_other_id,
2174                         .get_other_eap_id = _get_other_eap_id,
2175                         .enable_extension = _enable_extension,
2176                         .supports_extension = _supports_extension,
2177                         .set_condition = _set_condition,
2178                         .has_condition = _has_condition,
2179                         .set_pending_updates = _set_pending_updates,
2180                         .get_pending_updates = _get_pending_updates,
2181                         .create_peer_address_enumerator = _create_peer_address_enumerator,
2182                         .add_peer_address = _add_peer_address,
2183                         .clear_peer_addresses = _clear_peer_addresses,
2184                         .has_mapping_changed = _has_mapping_changed,
2185                         .retransmit = _retransmit,
2186                         .delete = _delete_,
2187                         .destroy = _destroy,
2188                         .send_dpd = _send_dpd,
2189                         .send_keepalive = _send_keepalive,
2190                         .get_keymat = _get_keymat,
2191                         .add_child_sa = _add_child_sa,
2192                         .get_child_sa = _get_child_sa,
2193                         .get_child_count = _get_child_count,
2194                         .create_child_sa_enumerator = _create_child_sa_enumerator,
2195                         .remove_child_sa = _remove_child_sa,
2196                         .rekey_child_sa = _rekey_child_sa,
2197                         .delete_child_sa = _delete_child_sa,
2198                         .destroy_child_sa = _destroy_child_sa,
2199                         .rekey = _rekey,
2200                         .reauth = _reauth,
2201                         .reestablish = _reestablish,
2202                         .set_auth_lifetime = _set_auth_lifetime,
2203                         .roam = _roam,
2204                         .inherit = _inherit,
2205                         .generate_message = _generate_message,
2206                         .reset = _reset,
2207                         .get_unique_id = _get_unique_id,
2208                         .add_virtual_ip = _add_virtual_ip,
2209                         .clear_virtual_ips = _clear_virtual_ips,
2210                         .create_virtual_ip_enumerator = _create_virtual_ip_enumerator,
2211                         .add_configuration_attribute = _add_configuration_attribute,
2212                         .set_kmaddress = _set_kmaddress,
2213                         .create_task_enumerator = _create_task_enumerator,
2214                         .flush_queue = _flush_queue,
2215                         .queue_task = _queue_task,
2216 #ifdef ME
2217                         .act_as_mediation_server = _act_as_mediation_server,
2218                         .get_server_reflexive_host = _get_server_reflexive_host,
2219                         .set_server_reflexive_host = _set_server_reflexive_host,
2220                         .get_connect_id = _get_connect_id,
2221                         .initiate_mediation = _initiate_mediation,
2222                         .initiate_mediated = _initiate_mediated,
2223                         .relay = _relay,
2224                         .callback = _callback,
2225                         .respond = _respond,
2226 #endif /* ME */
2227                 },
2228                 .ike_sa_id = ike_sa_id->clone(ike_sa_id),
2229                 .version = version,
2230                 .child_sas = linked_list_create(),
2231                 .my_host = host_create_any(AF_INET),
2232                 .other_host = host_create_any(AF_INET),
2233                 .my_id = identification_create_from_encoding(ID_ANY, chunk_empty),
2234                 .other_id = identification_create_from_encoding(ID_ANY, chunk_empty),
2235                 .keymat = keymat_create(version, initiator),
2236                 .state = IKE_CREATED,
2237                 .stats[STAT_INBOUND] = time_monotonic(NULL),
2238                 .stats[STAT_OUTBOUND] = time_monotonic(NULL),
2239                 .my_auth = auth_cfg_create(),
2240                 .other_auth = auth_cfg_create(),
2241                 .my_auths = linked_list_create(),
2242                 .other_auths = linked_list_create(),
2243                 .unique_id = ++unique_id,
2244                 .peer_addresses = linked_list_create(),
2245                 .my_vips = linked_list_create(),
2246                 .other_vips = linked_list_create(),
2247                 .attributes = linked_list_create(),
2248                 .keepalive_interval = lib->settings->get_time(lib->settings,
2249                                                         "%s.keep_alive", KEEPALIVE_INTERVAL, charon->name),
2250                 .retry_initiate_interval = lib->settings->get_time(lib->settings,
2251                                                         "%s.retry_initiate_interval", 0, charon->name),
2252                 .flush_auth_cfg = lib->settings->get_bool(lib->settings,
2253                                                         "%s.flush_auth_cfg", FALSE, charon->name),
2254         );
2255
2256         if (version == IKEV2)
2257         {       /* always supported with IKEv2 */
2258                 enable_extension(this, EXT_DPD);
2259         }
2260
2261         this->task_manager = task_manager_create(&this->public);
2262         this->my_host->set_port(this->my_host,
2263                                                         charon->socket->get_port(charon->socket, FALSE));
2264
2265         if (!this->task_manager || !this->keymat)
2266         {
2267                 DBG1(DBG_IKE, "IKE version %d not supported", this->version);
2268                 destroy(this);
2269                 return NULL;
2270         }
2271         return &this->public;
2272 }