Source/charon/encoding/message.c

   1 /**
   2  * @file message.c
   3  *
   4  * @brief Class message_t. Object of this type represents an IKEv2-Message.
   5  *
   6  */
   7
   8 /*
   9  * Copyright (C) 2005 Jan Hutter, Martin Willi
  10  * Hochschule fuer Technik Rapperswil
  11  *
  12  * This program is free software; you can redistribute it and/or modify it
  13  * under the terms of the GNU General Public License as published by the
  14  * Free Software Foundation; either version 2 of the License, or (at your
  15  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
  16  *
  17  * This program is distributed in the hope that it will be useful, but
  18  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  19  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  20  * for more details.
  21  */
  22
  23 #include <stdlib.h>
  24
  25 #include "message.h"
  26
  27 #include <types.h>
  28 #include <globals.h>
  29 #include <ike_sa_id.h>
  30 #include <encoding/generator.h>
  31 #include <encoding/parser.h>
  32 #include <utils/linked_list.h>
  33 #include <utils/allocator.h>
  34 #include <utils/logger_manager.h>
  35 #include <encoding/payloads/encodings.h>
  36 #include <encoding/payloads/payload.h>
  37
  38
  39 /**
  40  * Supported payload entry used in message_rule_t
  41  *
  42  */
  43 typedef struct supported_payload_entry_s supported_payload_entry_t;
  44
  45 struct supported_payload_entry_s {
  46         /**
  47          * Payload type
  48          */
  49          payload_type_t payload_type;
  50
  51          /**
  52           * Minimal occurence of this payload
  53           */
  54          size_t min_occurence;
  55
  56          /**
  57           * Max occurence of this payload
  58           */
  59          size_t max_occurence;
  60 };
  61
  62 /**
  63  * Message Rule used to find out which payloads are supported by each message type
  64  *
  65  */
  66 typedef struct message_rule_s message_rule_t;
  67
  68 struct message_rule_s {
  69         /**
  70          * Type of message
  71          */
  72         exchange_type_t exchange_type;
  73
  74         /**
  75          * Is message a request or response
  76          */
  77         bool is_request;
  78          /**
  79           * Number of supported payloads
  80           */
  81          size_t supported_payloads_count;
  82         /**
  83          * Pointer to first supported payload entry
  84          */
  85          supported_payload_entry_t *supported_payloads;
  86 };
  87
  88 /**
  89  * message rule for ike_sa_init from initiator
  90  */
  91 static supported_payload_entry_t supported_ike_sa_init_i_payloads[] =
  92 {
  93         {SECURITY_ASSOCIATION,1,1},
  94         {KEY_EXCHANGE,1,1},
  95         {NONCE,1,1},
  96 };
  97
  98 /**
  99  * message rule for ike_sa_init from responder
 100  */
 101 static supported_payload_entry_t supported_ike_sa_init_r_payloads[] =
 102 {
 103         {SECURITY_ASSOCIATION,1,1},
 104         {KEY_EXCHANGE,1,1},
 105         {NONCE,1,1},
 106 };
 107
 108
 109 /**
 110  * message rules, defines allowed payloads
 111  */
 112 static message_rule_t message_rules[] = {
 113         {IKE_SA_INIT,TRUE,(sizeof(supported_ike_sa_init_i_payloads)/sizeof(supported_payload_entry_t)),supported_ike_sa_init_i_payloads},
 114         {IKE_SA_INIT,FALSE,(sizeof(supported_ike_sa_init_r_payloads)/sizeof(supported_payload_entry_t)),supported_ike_sa_init_r_payloads}
 115 };
 116
 117 /**
 118  * Entry for a payload in the internal used linked list
 119  *
 120  */
 121 typedef struct payload_entry_s payload_entry_t;
 122
 123 struct payload_entry_s {
 124         /**
 125          * Type of payload
 126          */
 127         payload_type_t payload_type;
 128         /**
 129          * Data struct holding the data of given payload
 130          */
 131         void *data_struct;
 132 };
 133
 134
 135 /**
 136  * Private data of an message_t object
 137  */
 138 typedef struct private_message_s private_message_t;
 139
 140 struct private_message_s {
 141
 142         /**
 143          * Public part of a message_t object
 144          */
 145         message_t public;
 146
 147
 148         /**
 149          * Minor version of message
 150          */
 151         u_int8_t major_version;
 152
 153         /**
 154          * Major version of message
 155          */
 156         u_int8_t minor_version;
 157
 158         /**
 159          * First Payload in message
 160          */
 161         payload_type_t first_payload;
 162
 163         /**
 164          * Assigned exchange type
 165          */
 166         exchange_type_t exchange_type;
 167
 168
 169         /**
 170          * TRUE if message is request.
 171          * FALSE if message is reply.
 172          */
 173         bool is_request;
 174
 175         /**
 176          * Message ID of this message
 177          */
 178         u_int32_t message_id;
 179
 180         /**
 181          * ID of assigned IKE_SA
 182          */
 183         ike_sa_id_t *ike_sa_id;
 184
 185         /**
 186          * Assigned UDP packet.
 187          *
 188          * Stores incoming packet or last generated one.
 189          */
 190         packet_t *packet;
 191
 192         /**
 193          * Linked List where payload data are stored in
 194          */
 195         linked_list_t *payloads;
 196
 197          /**
 198           * Assigned parser to parse Header and Body of this message
 199           */
 200         parser_t *parser;
 201
 202         /**
 203          * logger for this message
 204          */
 205         logger_t *logger;
 206
 207         /**
 208          * Gets a list of supported payloads of this message type
 209          *
 210          * @param this                                                  calling object
 211          * @param[out] supported_payloads               first entry of supported payloads
 212          * @param[out] supported_payloads_count number of supported payload entries
 213          *
 214          * @return                                                              SUCCESS
 215          *                                                                              NOT_FOUND if no supported payload definition could be found
 216          */
 217         status_t (*get_supported_payloads) (private_message_t *this, supported_payload_entry_t **supported_payloads,size_t *supported_payloads_count);
 218
 219 };
 220
 221 /**
 222  * Implements private_message_t's get_supported_payloads function.
 223  * See #private_message_t.get_supported_payloads.
 224  */
 225 status_t get_supported_payloads (private_message_t *this, supported_payload_entry_t **supported_payloads,size_t *supported_payloads_count)
 226 {
 227         int i;
 228         exchange_type_t exchange_type = this->public.get_exchange_type(&(this->public));
 229         bool is_request = this->public.get_request(&(this->public));
 230
 231
 232         for (i = 0; i < (sizeof(message_rules) / sizeof(message_rule_t)); i++)
 233         {
 234                 if ((exchange_type == message_rules[i].exchange_type) &&
 235                         (is_request == message_rules[i].is_request))
 236                 {
 237                         /* found rule for given exchange_type*/
 238                         *supported_payloads = message_rules[i].supported_payloads;
 239                         *supported_payloads_count = message_rules[i].supported_payloads_count;
 240
 241                         return SUCCESS;
 242                 }
 243
 244
 245         }
 246         *supported_payloads = NULL;
 247         *supported_payloads_count = 0;
 248         return NOT_FOUND;
 249 }
 250
 251 /**
 252  * Implements message_t's set_ike_sa_id function.
 253  * See #message_s.set_ike_sa_id.
 254  */
 255 static status_t set_ike_sa_id (private_message_t *this,ike_sa_id_t *ike_sa_id)
 256 {
 257         status_t status;
 258         status = ike_sa_id->clone(ike_sa_id,&(this->ike_sa_id));
 259         return status;
 260 }
 261
 262 /**
 263  * Implements message_t's get_ike_sa_id function.
 264  * See #message_s.get_ike_sa_id.
 265  */
 266 static status_t get_ike_sa_id (private_message_t *this,ike_sa_id_t **ike_sa_id)
 267 {
 268         status_t status;
 269         if (this->ike_sa_id == NULL)
 270         {
 271                 return FAILED;
 272         }
 273         status = this->ike_sa_id->clone(this->ike_sa_id,ike_sa_id);
 274         return status;
 275 }
 276
 277
 278 /**
 279  * Implements message_t's set_message_id function.
 280  * See #message_s.set_message_id.
 281  */
 282 static status_t set_message_id (private_message_t *this,u_int32_t message_id)
 283 {
 284         this->message_id = message_id;
 285         return SUCCESS;
 286 }
 287
 288
 289 /**
 290  * Implements message_t's set_message_id function.
 291  * See #message_s.set_message_id.
 292  */
 293 static u_int32_t get_message_id (private_message_t *this)
 294 {
 295         return this->message_id;
 296 }
 297
 298 /**
 299  * Implements message_t's get_responder_spi function.
 300  * See #message_s.get_responder_spi.
 301  */
 302 static u_int64_t get_responder_spi (private_message_t *this)
 303 {
 304         return (this->ike_sa_id->get_responder_spi(this->ike_sa_id));
 305 }
 306
 307 /**
 308  * Implements message_t's set_major_version function.
 309  * See #message_s.set_major_version.
 310  */
 311 static status_t set_major_version (private_message_t *this,u_int8_t major_version)
 312 {
 313         this->major_version = major_version;
 314         return SUCCESS;
 315 }
 316
 317
 318 /**
 319  * Implements message_t's get_major_version function.
 320  * See #message_s.get_major_version.
 321  */
 322 static u_int8_t get_major_version (private_message_t *this)
 323 {
 324         return this->major_version;
 325 }
 326
 327 /**
 328  * Implements message_t's set_minor_version function.
 329  * See #message_s.set_minor_version.
 330  */
 331 static status_t set_minor_version (private_message_t *this,u_int8_t minor_version)
 332 {
 333         this->minor_version = minor_version;
 334         return SUCCESS;
 335 }
 336
 337
 338 /**
 339  * Implements message_t's get_minor_version function.
 340  * See #message_s.get_minor_version.
 341  */
 342 static u_int8_t get_minor_version (private_message_t *this)
 343 {
 344         return this->minor_version;
 345 }
 346
 347 /**
 348  * Implements message_t's set_exchange_type function.
 349  * See #message_s.set_exchange_type.
 350  */
 351 static status_t set_exchange_type (private_message_t *this,exchange_type_t exchange_type)
 352 {
 353         this->exchange_type = exchange_type;
 354         return SUCCESS;
 355 }
 356
 357
 358 /**
 359  * Implements message_t's get_exchange_type function.
 360  * See #message_s.get_exchange_type.
 361  */
 362 static exchange_type_t get_exchange_type (private_message_t *this)
 363 {
 364         return this->exchange_type;
 365 }
 366
 367
 368 /**
 369  * Implements message_t's set_request function.
 370  * See #message_s.set_request.
 371  */
 372 static status_t set_request (private_message_t *this,bool request)
 373 {
 374         this->is_request = request;
 375         return SUCCESS;
 376 }
 377
 378 /**
 379  * Implements message_t's get_request function.
 380  * See #message_s.get_request.
 381  */
 382 static exchange_type_t get_request (private_message_t *this)
 383 {
 384         return this->is_request;
 385 }
 386
 387 static status_t add_payload(private_message_t *this, payload_t *payload)
 388 {
 389         payload_t *last_payload;
 390         if ((this->payloads->get_count(this->payloads) > 0) &&
 391             (this->payloads->get_last(this->payloads,(void **) &last_payload) != SUCCESS))
 392         {
 393                 return OUT_OF_RES;
 394         }
 395
 396         if (this->payloads->insert_last(this->payloads, payload) != SUCCESS)
 397         {
 398                 return OUT_OF_RES;
 399         }
 400         if (this->payloads->get_count(this->payloads) == 1)
 401         {
 402                 this->first_payload = payload->get_type(payload);
 403         }
 404         else
 405         {
 406                 last_payload->set_next_type(last_payload,payload->get_type(payload));
 407         }
 408
 409         this->logger->log(this->logger, CONTROL|MORE, "added payload of type %s to message",
 410                                                 mapping_find(payload_type_m, payload->get_type(payload)));
 411
 412         return SUCCESS;
 413 }
 414
 415 static status_t set_source(private_message_t *this, host_t *host)
 416 {
 417         if (this->packet->source != NULL)
 418         {
 419                 this->packet->source->destroy(this->packet->source);
 420         }
 421         this->packet->source = host;
 422         return SUCCESS;
 423 }
 424
 425 static status_t set_destination(private_message_t *this, host_t *host)
 426 {
 427         if (this->packet->destination != NULL)
 428         {
 429                 this->packet->destination->destroy(this->packet->destination);
 430         }
 431         this->packet->destination = host;
 432         return SUCCESS;
 433 }
 434
 435 static status_t get_source(private_message_t *this, host_t **host)
 436 {
 437         *host = this->packet->source;
 438         return SUCCESS;
 439 }
 440
 441 static status_t get_destination(private_message_t *this, host_t **host)
 442 {
 443         *host = this->packet->destination;
 444         return SUCCESS;
 445 }
 446
 447
 448 static status_t get_payload_iterator(private_message_t *this, linked_list_iterator_t **iterator)
 449 {
 450         return this->payloads->create_iterator(this->payloads, iterator, TRUE);
 451 }
 452
 453
 454 /**
 455  * Implements message_t's generate function.
 456  * See #message_s.generate.
 457  */
 458 static status_t generate(private_message_t *this, packet_t **packet)
 459 {
 460         generator_t *generator;
 461         ike_header_t *ike_header;
 462         payload_t *payload, *next_payload;
 463         linked_list_iterator_t *iterator;
 464         status_t status;
 465
 466
 467         this->logger->log(this->logger, CONTROL, "generating message, contains %d payloads",
 468                                                 this->payloads->get_count(this->payloads));
 469
 470         if (this->exchange_type == EXCHANGE_TYPE_UNDEFINED)
 471         {
 472                 this->logger->log(this->logger, ERROR, "exchange type is not defined");
 473                 return INVALID_STATE;
 474         }
 475
 476         if (this->packet->source == NULL ||
 477                 this->packet->destination == NULL)
 478         {
 479                 this->logger->log(this->logger, ERROR, "source/destination not defined");
 480                 return INVALID_STATE;
 481         }
 482
 483
 484         ike_header = ike_header_create();
 485         if (ike_header == NULL)
 486         {
 487                 return OUT_OF_RES;
 488         }
 489
 490
 491         ike_header->set_exchange_type(ike_header, this->exchange_type);
 492         ike_header->set_message_id(ike_header, this->message_id);
 493         ike_header->set_response_flag(ike_header, !this->is_request);
 494         ike_header->set_initiator_flag(ike_header, this->ike_sa_id->is_initiator(this->ike_sa_id));
 495         ike_header->set_initiator_spi(ike_header, this->ike_sa_id->get_initiator_spi(this->ike_sa_id));
 496         ike_header->set_responder_spi(ike_header, this->ike_sa_id->get_responder_spi(this->ike_sa_id));
 497
 498         generator = generator_create();
 499         if (generator == NULL)
 500         {
 501                 return OUT_OF_RES;
 502         }
 503
 504         payload = (payload_t*)ike_header;
 505
 506         if (this->payloads->create_iterator(this->payloads, &iterator, TRUE) != SUCCESS)
 507         {
 508                 generator->destroy(generator);
 509                 ike_header->destroy(ike_header);
 510                 return OUT_OF_RES;
 511         }
 512         while(iterator->has_next(iterator))
 513         {
 514                 iterator->current(iterator, (void**)&next_payload);
 515                 payload->set_next_type(payload, next_payload->get_type(next_payload));
 516                 status = generator->generate_payload(generator, payload);
 517                 if (status != SUCCESS)
 518                 {
 519                         generator->destroy(generator);
 520                         ike_header->destroy(ike_header);
 521                         return status;
 522                 }
 523                 payload = next_payload;
 524         }
 525         iterator->destroy(iterator);
 526
 527         payload->set_next_type(payload, NO_PAYLOAD);
 528         status = generator->generate_payload(generator, payload);
 529         if (status != SUCCESS)
 530         {
 531                 generator->destroy(generator);
 532                 ike_header->destroy(ike_header);
 533                 return status;
 534         }
 535
 536         ike_header->destroy(ike_header);
 537
 538
 539
 540         if (this->packet->data.ptr != NULL)
 541         {
 542                 allocator_free(this->packet->data.ptr);
 543         }
 544
 545         status = generator->write_to_chunk(generator, &(this->packet->data));
 546         if (status != SUCCESS)
 547         {
 548                 generator->destroy(generator);
 549                 return status;
 550         }
 551
 552         this->packet->clone(this->packet, packet);
 553
 554         generator->destroy(generator);
 555
 556
 557         this->logger->log(this->logger, CONTROL, "message generated successfully");
 558         return SUCCESS;
 559 }
 560
 561 /**
 562  * Implements message_t's parse_header function.
 563  * See #message_s.parse_header.
 564  */
 565 static status_t parse_header(private_message_t *this)
 566 {
 567         ike_header_t *ike_header;
 568         status_t status;
 569
 570
 571         this->logger->log(this->logger, CONTROL, "parsing header of message");
 572
 573         this->parser->reset_context(this->parser);
 574         status = this->parser->parse_payload(this->parser,HEADER,(payload_t **) &ike_header);
 575         if (status != SUCCESS)
 576         {
 577                 this->logger->log(this->logger, ERROR, "Header could not be parsed");
 578                 return status;
 579
 580         }
 581
 582         /* verify payload */
 583         status = ike_header->payload_interface.verify(&(ike_header->payload_interface));
 584         if (status != SUCCESS)
 585         {
 586                 this->logger->log(this->logger, ERROR, "Header verification failed");
 587                 ike_header->destroy(ike_header);
 588                 return status;
 589         }
 590
 591         if (this->ike_sa_id != NULL)
 592         {
 593                 this->ike_sa_id->destroy(this->ike_sa_id);
 594         }
 595
 596         this->ike_sa_id = ike_sa_id_create(ike_header->get_initiator_spi(ike_header),
 597                                                                            ike_header->get_responder_spi(ike_header),
 598                                                                            ike_header->get_initiator_flag(ike_header));
 599         if (this->ike_sa_id == NULL)
 600         {
 601                 this->logger->log(this->logger, ERROR, "could not create ike_sa_id object");
 602                 ike_header->destroy(ike_header);
 603                 return OUT_OF_RES;
 604         }
 605         this->exchange_type = ike_header->get_exchange_type(ike_header);
 606         this->message_id = ike_header->get_message_id(ike_header);
 607         this->is_request = (!(ike_header->get_response_flag(ike_header)));
 608         this->major_version = ike_header->get_maj_version(ike_header);
 609         this->minor_version = ike_header->get_min_version(ike_header);
 610         this->first_payload = ike_header->payload_interface.get_next_type(&(ike_header->payload_interface));
 611
 612
 613         this->logger->log(this->logger, CONTROL, "parsing header successfully");
 614
 615         ike_header->destroy(ike_header);
 616         return SUCCESS;
 617 }
 618
 619 /**
 620  * Implements message_t's parse_body function.
 621  * See #message_s.parse_body.
 622  */
 623 static status_t parse_body (private_message_t *this)
 624 {
 625         status_t status = SUCCESS;
 626         int i;
 627         payload_type_t current_payload_type = this->first_payload;
 628         supported_payload_entry_t *supported_payloads;
 629         size_t supported_payloads_count;
 630
 631
 632         this->logger->log(this->logger, CONTROL, "parsing body of message");
 633
 634         if (this->get_supported_payloads (this, &supported_payloads, &supported_payloads_count) != SUCCESS)
 635         {
 636                 this->logger->log(this->logger, ERROR, "could not get supported payloads");
 637                 return FAILED;
 638         }
 639
 640         while (current_payload_type != NO_PAYLOAD)
 641         {
 642                 payload_t *current_payload;
 643                 bool supported = FALSE;
 644
 645                 this->logger->log(this->logger, CONTROL|MORE, "start parsing payload of type %s",
 646                                                         mapping_find(payload_type_m, current_payload_type));
 647                 for (i = 0; i < supported_payloads_count;i++)
 648                 {
 649                         if (supported_payloads[i].payload_type == current_payload_type)
 650                         {
 651                                 supported = TRUE;
 652                                 break;
 653                         }
 654                 }
 655                 if (!supported && (current_payload_type != NO_PAYLOAD))
 656                 {
 657                         /* type not supported */
 658                         status = NOT_SUPPORTED;
 659                         this->logger->log(this->logger, ERROR, "payload type %s not supported",mapping_find(payload_type_m,current_payload_type));
 660                         break;
 661                 }
 662
 663                 status = this->parser->parse_payload(this->parser,current_payload_type,(payload_t **) &current_payload);
 664                 if (status != SUCCESS)
 665                 {
 666                         this->logger->log(this->logger, ERROR, "payload type %s could not be parsed",mapping_find(payload_type_m,current_payload_type));
 667                         break;
 668                 }
 669
 670                 status = current_payload->verify(current_payload);
 671                 if (status != SUCCESS)
 672                 {
 673                         this->logger->log(this->logger, ERROR, "payload type %s could not be verified",mapping_find(payload_type_m,current_payload_type));
 674                         status = VERIFY_ERROR;
 675                         break;
 676                 }
 677
 678                 /* get next payload type */
 679                 current_payload_type = current_payload->get_next_type(current_payload);
 680
 681                 status = this->payloads->insert_last(this->payloads,current_payload);
 682                 if (status != SUCCESS)
 683                 {
 684                         this->logger->log(this->logger, ERROR, "Could not insert current payload to internal list cause of ressource exhausting");
 685                         break;
 686                 }
 687
 688         }
 689         if (status != SUCCESS)
 690         {
 691                 /* already parsed payload is destroyed later in destroy call from outside this object */
 692         }
 693         else
 694         {
 695                 linked_list_iterator_t *iterator;
 696
 697                 status = this->payloads->create_iterator(this->payloads,&iterator,TRUE);
 698                 if (status != SUCCESS)
 699                 {
 700                         this->logger->log(this->logger, ERROR, "Could not create iterator to check supported payloads");
 701                         return status;
 702                 }
 703
 704                 /* check for payloads with wrong count*/
 705                 for (i = 0; i < supported_payloads_count;i++)
 706                 {
 707                         size_t min_occurence = supported_payloads[i].min_occurence;
 708                         size_t max_occurence = supported_payloads[i].max_occurence;
 709                         payload_type_t payload_type = supported_payloads[i].payload_type;
 710                         size_t found_payloads = 0;
 711
 712                         iterator->reset(iterator);
 713
 714                         while(iterator->has_next(iterator))
 715                         {
 716                                 payload_t *current_payload;
 717                                 status = iterator->current(iterator,(void **)&current_payload);
 718                                 if (status != SUCCESS)
 719                                 {
 720                                         this->logger->log(this->logger, ERROR, "Could not get payload from internal list");
 721                                         iterator->destroy(iterator);
 722                                         return status;
 723                                 }
 724                                 if (current_payload->get_type(current_payload) == payload_type)
 725                                 {
 726                                         found_payloads++;
 727                                         if (found_payloads > max_occurence)
 728                                         {
 729                                                 this->logger->log(this->logger, ERROR, "Payload of type %s more than %d times (%d) occured in current message",
 730                                                                                   mapping_find(payload_type_m,current_payload->get_type(current_payload)),max_occurence,found_payloads);
 731                                                 iterator->destroy(iterator);
 732                                                 return NOT_SUPPORTED;
 733                                         }
 734                                 }
 735
 736                         }
 737                         if (found_payloads < min_occurence)
 738                         {
 739                                         this->logger->log(this->logger, ERROR, "Payload of type %s not occured %d times",
 740                                                                           mapping_find(payload_type_m,payload_type),min_occurence);
 741                                         iterator->destroy(iterator);
 742                                         return NOT_SUPPORTED;
 743                         }
 744
 745                 }
 746                 iterator->destroy(iterator);
 747         }
 748         return status;
 749 }
 750
 751
 752
 753 /**
 754  * Implements message_t's destroy function.
 755  * See #message_s.destroy.
 756  */
 757 static status_t destroy (private_message_t *this)
 758 {
 759         linked_list_iterator_t *iterator;
 760
 761         this->packet->destroy(this->packet);
 762
 763         if (this->ike_sa_id != NULL)
 764         {
 765                 this->ike_sa_id->destroy(this->ike_sa_id);
 766         }
 767
 768         this->payloads->create_iterator(this->payloads, &iterator, TRUE);
 769         while (iterator->has_next(iterator))
 770         {
 771                 payload_t *payload;
 772                 iterator->current(iterator, (void**)&payload);
 773                 this->logger->log(this->logger, CONTROL|MOST, "Destroying payload of type %s",
 774                                                         mapping_find(payload_type_m, payload->get_type(payload)));
 775                 payload->destroy(payload);
 776         }
 777         iterator->destroy(iterator);
 778         this->payloads->destroy(this->payloads);
 779         this->parser->destroy(this->parser);
 780         global_logger_manager->destroy_logger(global_logger_manager, this->logger);
 781
 782         allocator_free(this);
 783         return SUCCESS;
 784 }
 785
 786 /*
 787  * Described in Header-File
 788  */
 789 message_t *message_create_from_packet(packet_t *packet)
 790 {
 791         private_message_t *this = allocator_alloc_thing(private_message_t);
 792         if (this == NULL)
 793         {
 794                 return NULL;
 795         }
 796
 797         /* public functions */
 798         this->public.set_major_version = (status_t(*)(message_t*, u_int8_t))set_major_version;
 799         this->public.get_major_version = (u_int8_t(*)(message_t*))get_major_version;
 800         this->public.set_minor_version = (status_t(*)(message_t*, u_int8_t))set_minor_version;
 801         this->public.get_minor_version = (u_int8_t(*)(message_t*))get_minor_version;
 802         this->public.set_message_id = (status_t(*)(message_t*, u_int32_t))set_message_id;
 803         this->public.get_message_id = (u_int32_t(*)(message_t*))get_message_id;
 804         this->public.get_responder_spi = (u_int64_t(*)(message_t*))get_responder_spi;
 805         this->public.set_ike_sa_id = (status_t(*)(message_t*, ike_sa_id_t *))set_ike_sa_id;
 806         this->public.get_ike_sa_id = (status_t(*)(message_t*, ike_sa_id_t **))get_ike_sa_id;
 807         this->public.set_exchange_type = (status_t(*)(message_t*, exchange_type_t))set_exchange_type;
 808         this->public.get_exchange_type = (exchange_type_t(*)(message_t*))get_exchange_type;
 809         this->public.set_request = (status_t(*)(message_t*, bool))set_request;
 810         this->public.get_request = (bool(*)(message_t*))get_request;
 811         this->public.add_payload = (status_t(*)(message_t*,payload_t*))add_payload;
 812         this->public.generate = (status_t (*) (message_t *, packet_t**)) generate;
 813         this->public.set_source = (status_t (*) (message_t*,host_t*)) set_source;
 814         this->public.get_source = (status_t (*) (message_t*,host_t**)) get_source;
 815         this->public.set_destination = (status_t (*) (message_t*,host_t*)) set_destination;
 816         this->public.get_destination = (status_t (*) (message_t*,host_t**)) get_destination;
 817         this->public.get_payload_iterator = (status_t (*) (message_t *, linked_list_iterator_t **)) get_payload_iterator;
 818         this->public.parse_header =     (status_t (*) (message_t *)) parse_header;
 819         this->public.parse_body =       (status_t (*) (message_t *)) parse_body;
 820         this->public.destroy = (status_t(*)(message_t*))destroy;
 821
 822         /* public values */
 823         this->exchange_type = EXCHANGE_TYPE_UNDEFINED;
 824         this->is_request = TRUE;
 825         this->ike_sa_id = NULL;
 826         this->first_payload = NO_PAYLOAD;
 827         this->message_id = 0;
 828
 829         /* private functions */
 830         this->get_supported_payloads = get_supported_payloads;
 831
 832         /* private values */
 833         if (packet == NULL)
 834         {
 835                 packet = packet_create();
 836         }
 837         if (packet == NULL)
 838         {
 839                 allocator_free(this);
 840                 return NULL;
 841         }
 842         this->packet = packet;
 843         this->payloads = linked_list_create();
 844         if (this->payloads == NULL)
 845         {
 846                 allocator_free(this);
 847                 return NULL;
 848         }
 849
 850         /* parser is created from data of packet */
 851         this->parser = parser_create(this->packet->data);
 852         if (this->parser == NULL)
 853         {
 854                 this->payloads->destroy(this->payloads);
 855                 allocator_free(this);
 856                 return NULL;
 857         }
 858
 859         this->logger = global_logger_manager->create_logger(global_logger_manager, MESSAGE, NULL);
 860         if (this->logger == NULL)
 861         {
 862                 this->parser->destroy(this->parser);
 863                 this->payloads->destroy(this->payloads);
 864                 allocator_free(this);
 865                 return NULL;
 866         }
 867
 868         return (&this->public);
 869 }
 870
 871 /*
 872  * Described in Header-File
 873  */
 874 message_t *message_create()
 875 {
 876         return message_create_from_packet(NULL);
 877 }