Source/charon/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 "generator.h"
  31 #include "utils/linked_list.h"
  32 #include "utils/allocator.h"
  33 #include "utils/logger_manager.h"
  34 #include "payloads/encodings.h"
  35 #include "payloads/payload.h"
  36 #include "parser.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 set_major_version function.
 300  * See #message_s.set_major_version.
 301  */
 302 static status_t set_major_version (private_message_t *this,u_int8_t major_version)
 303 {
 304         this->major_version = major_version;
 305         return SUCCESS;
 306 }
 307
 308
 309 /**
 310  * Implements message_t's get_major_version function.
 311  * See #message_s.get_major_version.
 312  */
 313 static u_int8_t get_major_version (private_message_t *this)
 314 {
 315         return this->major_version;
 316 }
 317
 318 /**
 319  * Implements message_t's set_minor_version function.
 320  * See #message_s.set_minor_version.
 321  */
 322 static status_t set_minor_version (private_message_t *this,u_int8_t minor_version)
 323 {
 324         this->minor_version = minor_version;
 325         return SUCCESS;
 326 }
 327
 328
 329 /**
 330  * Implements message_t's get_minor_version function.
 331  * See #message_s.get_minor_version.
 332  */
 333 static u_int8_t get_minor_version (private_message_t *this)
 334 {
 335         return this->minor_version;
 336 }
 337
 338 /**
 339  * Implements message_t's set_exchange_type function.
 340  * See #message_s.set_exchange_type.
 341  */
 342 static status_t set_exchange_type (private_message_t *this,exchange_type_t exchange_type)
 343 {
 344         this->exchange_type = exchange_type;
 345         return SUCCESS;
 346 }
 347
 348
 349 /**
 350  * Implements message_t's get_exchange_type function.
 351  * See #message_s.get_exchange_type.
 352  */
 353 static exchange_type_t get_exchange_type (private_message_t *this)
 354 {
 355         return this->exchange_type;
 356 }
 357
 358
 359 /**
 360  * Implements message_t's set_request function.
 361  * See #message_s.set_request.
 362  */
 363 static status_t set_request (private_message_t *this,bool request)
 364 {
 365         this->is_request = request;
 366         return SUCCESS;
 367 }
 368
 369 /**
 370  * Implements message_t's get_request function.
 371  * See #message_s.get_request.
 372  */
 373 static exchange_type_t get_request (private_message_t *this)
 374 {
 375         return this->is_request;
 376 }
 377
 378 static status_t add_payload(private_message_t *this, payload_t *payload)
 379 {
 380         payload_t *last_payload;
 381         if ((this->payloads->get_count(this->payloads) > 0) &&
 382             (this->payloads->get_last(this->payloads,(void **) &last_payload) != SUCCESS))
 383         {
 384                 return OUT_OF_RES;
 385         }
 386
 387         if (this->payloads->insert_last(this->payloads, payload) != SUCCESS)
 388         {
 389                 return OUT_OF_RES;
 390         }
 391         if (this->payloads->get_count(this->payloads) == 1)
 392         {
 393                 this->first_payload = payload->get_type(payload);
 394         }
 395         else
 396         {
 397                 last_payload->set_next_type(last_payload,payload->get_type(payload));
 398         }
 399
 400         this->logger->log(this->logger, CONTROL|MORE, "added payload of type %s to message",
 401                                                 mapping_find(payload_type_m, payload->get_type(payload)));
 402
 403         return SUCCESS;
 404 }
 405
 406 static status_t set_source(private_message_t *this, host_t *host)
 407 {
 408         if (this->packet->source != NULL)
 409         {
 410                 this->packet->source->destroy(this->packet->source);
 411         }
 412         this->packet->source = host;
 413         return SUCCESS;
 414 }
 415
 416 static status_t set_destination(private_message_t *this, host_t *host)
 417 {
 418         if (this->packet->destination != NULL)
 419         {
 420                 this->packet->destination->destroy(this->packet->destination);
 421         }
 422         this->packet->destination = host;
 423         return SUCCESS;
 424 }
 425
 426 static status_t get_source(private_message_t *this, host_t **host)
 427 {
 428         *host = this->packet->source;
 429         return SUCCESS;
 430 }
 431
 432 static status_t get_destination(private_message_t *this, host_t **host)
 433 {
 434         *host = this->packet->destination;
 435         return SUCCESS;
 436 }
 437
 438
 439 static status_t get_payload_iterator(private_message_t *this, linked_list_iterator_t **iterator)
 440 {
 441         return this->payloads->create_iterator(this->payloads, iterator, TRUE);
 442 }
 443
 444
 445 /**
 446  * Implements message_t's generate function.
 447  * See #message_s.generate.
 448  */
 449 static status_t generate(private_message_t *this, packet_t **packet)
 450 {
 451         generator_t *generator;
 452         ike_header_t *ike_header;
 453         payload_t *payload, *next_payload;
 454         linked_list_iterator_t *iterator;
 455         status_t status;
 456
 457
 458         this->logger->log(this->logger, CONTROL, "generating message, contains %d payloads",
 459                                                 this->payloads->get_count(this->payloads));
 460
 461         if (this->exchange_type == EXCHANGE_TYPE_UNDEFINED)
 462         {
 463                 this->logger->log(this->logger, ERROR, "exchange type is not defined");
 464                 return INVALID_STATE;
 465         }
 466
 467         if (this->packet->source == NULL ||
 468                 this->packet->destination == NULL)
 469         {
 470                 this->logger->log(this->logger, ERROR, "source/destination not defined");
 471                 return INVALID_STATE;
 472         }
 473
 474
 475         ike_header = ike_header_create();
 476         if (ike_header == NULL)
 477         {
 478                 return OUT_OF_RES;
 479         }
 480
 481
 482         ike_header->set_exchange_type(ike_header, this->exchange_type);
 483         ike_header->set_message_id(ike_header, this->message_id);
 484         ike_header->set_response_flag(ike_header, !this->is_request);
 485         ike_header->set_initiator_flag(ike_header, this->ike_sa_id->is_initiator(this->ike_sa_id));
 486         ike_header->set_initiator_spi(ike_header, this->ike_sa_id->get_initiator_spi(this->ike_sa_id));
 487         ike_header->set_responder_spi(ike_header, this->ike_sa_id->get_responder_spi(this->ike_sa_id));
 488
 489         generator = generator_create();
 490         if (generator == NULL)
 491         {
 492                 return OUT_OF_RES;
 493         }
 494
 495         payload = (payload_t*)ike_header;
 496
 497         if (this->payloads->create_iterator(this->payloads, &iterator, TRUE) != SUCCESS)
 498         {
 499                 generator->destroy(generator);
 500                 ike_header->destroy(ike_header);
 501                 return OUT_OF_RES;
 502         }
 503         while(iterator->has_next(iterator))
 504         {
 505                 iterator->current(iterator, (void**)&next_payload);
 506                 payload->set_next_type(payload, next_payload->get_type(next_payload));
 507                 status = generator->generate_payload(generator, payload);
 508                 if (status != SUCCESS)
 509                 {
 510                         generator->destroy(generator);
 511                         ike_header->destroy(ike_header);
 512                         return status;
 513                 }
 514                 payload = next_payload;
 515         }
 516         iterator->destroy(iterator);
 517
 518         payload->set_next_type(payload, NO_PAYLOAD);
 519         status = generator->generate_payload(generator, payload);
 520         if (status != SUCCESS)
 521         {
 522                 generator->destroy(generator);
 523                 ike_header->destroy(ike_header);
 524                 return status;
 525         }
 526
 527         ike_header->destroy(ike_header);
 528
 529
 530
 531         if (this->packet->data.ptr != NULL)
 532         {
 533                 allocator_free(this->packet->data.ptr);
 534         }
 535
 536         status = generator->write_to_chunk(generator, &(this->packet->data));
 537         if (status != SUCCESS)
 538         {
 539                 generator->destroy(generator);
 540                 return status;
 541         }
 542
 543         this->packet->clone(this->packet, packet);
 544
 545         generator->destroy(generator);
 546
 547
 548         this->logger->log(this->logger, CONTROL, "message generated successfully");
 549         return SUCCESS;
 550 }
 551
 552 /**
 553  * Implements message_t's parse_header function.
 554  * See #message_s.parse_header.
 555  */
 556 static status_t parse_header(private_message_t *this)
 557 {
 558         ike_header_t *ike_header;
 559         status_t status;
 560
 561
 562         this->logger->log(this->logger, CONTROL, "parsing header of message");
 563
 564         this->parser->reset_context(this->parser);
 565         status = this->parser->parse_payload(this->parser,HEADER,(payload_t **) &ike_header);
 566         if (status != SUCCESS)
 567         {
 568                 this->logger->log(this->logger, ERROR, "Header could not be parsed");
 569                 return status;
 570
 571         }
 572
 573         /* verify payload */
 574         status = ike_header->payload_interface.verify(&(ike_header->payload_interface));
 575         if (status != SUCCESS)
 576         {
 577                 this->logger->log(this->logger, ERROR, "Header verification failed");
 578                 ike_header->destroy(ike_header);
 579                 return status;
 580         }
 581
 582         if (this->ike_sa_id != NULL)
 583         {
 584                 this->ike_sa_id->destroy(this->ike_sa_id);
 585         }
 586
 587         this->ike_sa_id = ike_sa_id_create(ike_header->get_initiator_spi(ike_header),
 588                                                                            ike_header->get_responder_spi(ike_header),
 589                                                                            ike_header->get_initiator_flag(ike_header));
 590         if (this->ike_sa_id == NULL)
 591         {
 592                 this->logger->log(this->logger, ERROR, "could not create ike_sa_id object");
 593                 ike_header->destroy(ike_header);
 594                 return OUT_OF_RES;
 595         }
 596         this->exchange_type = ike_header->get_exchange_type(ike_header);
 597         this->message_id = ike_header->get_message_id(ike_header);
 598         this->is_request = (!(ike_header->get_response_flag(ike_header)));
 599         this->major_version = ike_header->get_maj_version(ike_header);
 600         this->minor_version = ike_header->get_min_version(ike_header);
 601         this->first_payload = ike_header->payload_interface.get_next_type(&(ike_header->payload_interface));
 602
 603
 604         this->logger->log(this->logger, CONTROL, "parsing header successfully");
 605
 606         ike_header->destroy(ike_header);
 607         return SUCCESS;
 608 }
 609
 610 /**
 611  * Implements message_t's parse_body function.
 612  * See #message_s.parse_body.
 613  */
 614 static status_t parse_body (private_message_t *this)
 615 {
 616         status_t status = SUCCESS;
 617         int i;
 618         payload_type_t current_payload_type = this->first_payload;
 619         supported_payload_entry_t *supported_payloads;
 620         size_t supported_payloads_count;
 621
 622
 623         this->logger->log(this->logger, CONTROL, "parsing body of message");
 624
 625         if (this->get_supported_payloads (this, &supported_payloads, &supported_payloads_count) != SUCCESS)
 626         {
 627                 this->logger->log(this->logger, ERROR, "could not get supported payloads");
 628                 return FAILED;
 629         }
 630
 631         while (current_payload_type != NO_PAYLOAD)
 632         {
 633                 payload_t *current_payload;
 634                 bool supported = FALSE;
 635
 636                 this->logger->log(this->logger, CONTROL|MORE, "start parsing payload of type %s",
 637                                                         mapping_find(payload_type_m, current_payload_type));
 638                 for (i = 0; i < supported_payloads_count;i++)
 639                 {
 640                         if (supported_payloads[i].payload_type == current_payload_type)
 641                         {
 642                                 supported = TRUE;
 643                                 break;
 644                         }
 645                 }
 646                 if (!supported && (current_payload_type != NO_PAYLOAD))
 647                 {
 648                         /* type not supported */
 649                         status = NOT_SUPPORTED;
 650                         this->logger->log(this->logger, ERROR, "payload type %s not supported",mapping_find(payload_type_m,current_payload_type));
 651                         break;
 652                 }
 653
 654                 status = this->parser->parse_payload(this->parser,current_payload_type,(payload_t **) &current_payload);
 655                 if (status != SUCCESS)
 656                 {
 657                         this->logger->log(this->logger, ERROR, "payload type %s could not be parsed",mapping_find(payload_type_m,current_payload_type));
 658                         break;
 659                 }
 660
 661                 status = current_payload->verify(current_payload);
 662                 if (status != SUCCESS)
 663                 {
 664                         this->logger->log(this->logger, ERROR, "payload type %s could not be verified",mapping_find(payload_type_m,current_payload_type));
 665                         status = VERIFY_ERROR;
 666                         break;
 667                 }
 668
 669                 /* get next payload type */
 670                 current_payload_type = current_payload->get_next_type(current_payload);
 671
 672                 status = this->payloads->insert_last(this->payloads,current_payload);
 673                 if (status != SUCCESS)
 674                 {
 675                         this->logger->log(this->logger, ERROR, "Could not insert current payload to internal list cause of ressource exhausting");
 676                         break;
 677                 }
 678
 679         }
 680         if (status != SUCCESS)
 681         {
 682                 /* already parsed payload is destroyed later in destroy call from outside this object */
 683         }
 684         else
 685         {
 686                 linked_list_iterator_t *iterator;
 687
 688                 status = this->payloads->create_iterator(this->payloads,&iterator,TRUE);
 689                 if (status != SUCCESS)
 690                 {
 691                         this->logger->log(this->logger, ERROR, "Could not create iterator to check supported payloads");
 692                         return status;
 693                 }
 694
 695                 /* check for payloads with wrong count*/
 696                 for (i = 0; i < supported_payloads_count;i++)
 697                 {
 698                         size_t min_occurence = supported_payloads[i].min_occurence;
 699                         size_t max_occurence = supported_payloads[i].max_occurence;
 700                         payload_type_t payload_type = supported_payloads[i].payload_type;
 701                         size_t found_payloads = 0;
 702
 703                         iterator->reset(iterator);
 704
 705                         while(iterator->has_next(iterator))
 706                         {
 707                                 payload_t *current_payload;
 708                                 status = iterator->current(iterator,(void **)&current_payload);
 709                                 if (status != SUCCESS)
 710                                 {
 711                                         this->logger->log(this->logger, ERROR, "Could not get payload from internal list");
 712                                         iterator->destroy(iterator);
 713                                         return status;
 714                                 }
 715                                 if (current_payload->get_type(current_payload) == payload_type)
 716                                 {
 717                                         found_payloads++;
 718                                         if (found_payloads > max_occurence)
 719                                         {
 720                                                 this->logger->log(this->logger, ERROR, "Payload of type %s more than %d times (%d) occured in current message",
 721                                                                                   mapping_find(payload_type_m,current_payload->get_type(current_payload)),max_occurence,found_payloads);
 722                                                 iterator->destroy(iterator);
 723                                                 return NOT_SUPPORTED;
 724                                         }
 725                                 }
 726
 727                         }
 728                         if (found_payloads < min_occurence)
 729                         {
 730                                         this->logger->log(this->logger, ERROR, "Payload of type %s not occured %d times",
 731                                                                           mapping_find(payload_type_m,payload_type),min_occurence);
 732                                         iterator->destroy(iterator);
 733                                         return NOT_SUPPORTED;
 734                         }
 735
 736                 }
 737                 iterator->destroy(iterator);
 738         }
 739         return status;
 740 }
 741
 742
 743
 744 /**
 745  * Implements message_t's destroy function.
 746  * See #message_s.destroy.
 747  */
 748 static status_t destroy (private_message_t *this)
 749 {
 750         linked_list_iterator_t *iterator;
 751
 752         this->packet->destroy(this->packet);
 753
 754         if (this->ike_sa_id != NULL)
 755         {
 756                 this->ike_sa_id->destroy(this->ike_sa_id);
 757         }
 758
 759         this->payloads->create_iterator(this->payloads, &iterator, TRUE);
 760         while (iterator->has_next(iterator))
 761         {
 762                 payload_t *payload;
 763                 iterator->current(iterator, (void**)&payload);
 764                 this->logger->log(this->logger, CONTROL|MOST, "Destroying payload of type %s",
 765                                                         mapping_find(payload_type_m, payload->get_type(payload)));
 766                 payload->destroy(payload);
 767         }
 768         iterator->destroy(iterator);
 769         this->payloads->destroy(this->payloads);
 770         this->parser->destroy(this->parser);
 771         global_logger_manager->destroy_logger(global_logger_manager, this->logger);
 772
 773         allocator_free(this);
 774         return SUCCESS;
 775 }
 776
 777 /*
 778  * Described in Header-File
 779  */
 780 message_t *message_create_from_packet(packet_t *packet)
 781 {
 782         private_message_t *this = allocator_alloc_thing(private_message_t);
 783         if (this == NULL)
 784         {
 785                 return NULL;
 786         }
 787
 788         /* public functions */
 789         this->public.set_major_version = (status_t(*)(message_t*, u_int8_t))set_major_version;
 790         this->public.get_major_version = (u_int8_t(*)(message_t*))get_major_version;
 791         this->public.set_minor_version = (status_t(*)(message_t*, u_int8_t))set_minor_version;
 792         this->public.get_minor_version = (u_int8_t(*)(message_t*))get_minor_version;
 793         this->public.set_message_id = (status_t(*)(message_t*, u_int32_t))set_message_id;
 794         this->public.get_message_id = (u_int32_t(*)(message_t*))get_message_id;
 795         this->public.set_ike_sa_id = (status_t(*)(message_t*, ike_sa_id_t *))set_ike_sa_id;
 796         this->public.get_ike_sa_id = (status_t(*)(message_t*, ike_sa_id_t **))get_ike_sa_id;
 797         this->public.set_exchange_type = (status_t(*)(message_t*, exchange_type_t))set_exchange_type;
 798         this->public.get_exchange_type = (exchange_type_t(*)(message_t*))get_exchange_type;
 799         this->public.set_request = (status_t(*)(message_t*, bool))set_request;
 800         this->public.get_request = (bool(*)(message_t*))get_request;
 801         this->public.add_payload = (status_t(*)(message_t*,payload_t*))add_payload;
 802         this->public.generate = (status_t (*) (message_t *, packet_t**)) generate;
 803         this->public.set_source = (status_t (*) (message_t*,host_t*)) set_source;
 804         this->public.get_source = (status_t (*) (message_t*,host_t**)) get_source;
 805         this->public.set_destination = (status_t (*) (message_t*,host_t*)) set_destination;
 806         this->public.get_destination = (status_t (*) (message_t*,host_t**)) get_destination;
 807         this->public.get_payload_iterator = (status_t (*) (message_t *, linked_list_iterator_t **)) get_payload_iterator;
 808         this->public.parse_header =     (status_t (*) (message_t *)) parse_header;
 809         this->public.parse_body =       (status_t (*) (message_t *)) parse_body;
 810         this->public.destroy = (status_t(*)(message_t*))destroy;
 811
 812         /* public values */
 813         this->exchange_type = EXCHANGE_TYPE_UNDEFINED;
 814         this->is_request = TRUE;
 815         this->ike_sa_id = NULL;
 816         this->first_payload = NO_PAYLOAD;
 817         this->message_id = 0;
 818
 819         /* private functions */
 820         this->get_supported_payloads = get_supported_payloads;
 821
 822         /* private values */
 823         if (packet == NULL)
 824         {
 825                 packet = packet_create();
 826         }
 827         if (packet == NULL)
 828         {
 829                 allocator_free(this);
 830                 return NULL;
 831         }
 832         this->packet = packet;
 833         this->payloads = linked_list_create();
 834         if (this->payloads == NULL)
 835         {
 836                 allocator_free(this);
 837                 return NULL;
 838         }
 839
 840         /* parser is created from data of packet */
 841         this->parser = parser_create(this->packet->data);
 842         if (this->parser == NULL)
 843         {
 844                 this->payloads->destroy(this->payloads);
 845                 allocator_free(this);
 846                 return NULL;
 847         }
 848
 849         this->logger = global_logger_manager->create_logger(global_logger_manager, MESSAGE, NULL);
 850         if (this->logger == NULL)
 851         {
 852                 this->parser->destroy(this->parser);
 853                 this->payloads->destroy(this->payloads);
 854                 allocator_free(this);
 855                 return NULL;
 856         }
 857
 858         return (&this->public);
 859 }
 860
 861 /*
 862  * Described in Header-File
 863  */
 864 message_t *message_create()
 865 {
 866         return message_create_from_packet(NULL);
 867 }