libfreerdp-core/gcc.c

   1 /**
   2  * FreeRDP: A Remote Desktop Protocol Client
   3  * T.124 Generic Conference Control (GCC)
   4  *
   5  * Copyright 2011 Marc-Andre Moreau <marcandre.moreau@gmail.com>
   6  *
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *     http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  */
  19
  20 #include "gcc.h"
  21
  22 /**
  23  * T.124 GCC is defined in:
  24  *
  25  * http://www.itu.int/rec/T-REC-T.124-199802-S/en
  26  * ITU-T T.124 (02/98): Generic Conference Control
  27  */
  28
  29 /**
  30  * ConnectData ::= SEQUENCE
  31  * {
  32  *      t124Identifier  Key,
  33  *      connectPDU      OCTET_STRING
  34  * }
  35  *
  36  * Key ::= CHOICE
  37  * {
  38  *      object                          OBJECT_IDENTIFIER,
  39  *      h221NonStandard                 H221NonStandardIdentifier
  40  * }
  41  *
  42  * ConnectGCCPDU ::= CHOICE
  43  * {
  44  *      conferenceCreateRequest         ConferenceCreateRequest,
  45  *      conferenceCreateResponse        ConferenceCreateResponse,
  46  *      conferenceQueryRequest          ConferenceQueryRequest,
  47  *      conferenceQueryResponse         ConferenceQueryResponse,
  48  *      conferenceJoinRequest           ConferenceJoinRequest,
  49  *      conferenceJoinResponse          ConferenceJoinResponse,
  50  *      conferenceInviteRequest         ConferenceInviteRequest,
  51  *      conferenceInviteResponse        ConferenceInviteResponse,
  52  *      ...
  53  * }
  54  *
  55  * ConferenceCreateRequest ::= SEQUENCE
  56  * {
  57  *      conferenceName                  ConferenceName,
  58  *      convenerPassword                Password OPTIONAL,
  59  *      password                        Password OPTIONAL,
  60  *      lockedConference                BOOLEAN,
  61  *      listedConference                BOOLEAN,
  62  *      conductibleConference           BOOLEAN,
  63  *      terminationMethod               TerminationMethod,
  64  *      conductorPrivileges             SET OF Privilege OPTIONAL,
  65  *      conductedPrivileges             SET OF Privilege OPTIONAL,
  66  *      nonConductedPrivileges          SET OF Privilege OPTIONAL,
  67  *      conferenceDescription           TextString OPTIONAL,
  68  *      callerIdentifier                TextString OPTIONAL,
  69  *      userData                        UserData OPTIONAL,
  70  *      ...,
  71  *      conferencePriority              ConferencePriority OPTIONAL,
  72  *      conferenceMode                  ConferenceMode OPTIONAL
  73  * }
  74  *
  75  * ConferenceCreateResponse ::= SEQUENCE
  76  * {
  77  *      nodeID                          UserID,
  78  *      tag                             INTEGER,
  79  *      result                          ENUMERATED
  80  *      {
  81  *              success                         (0),
  82  *              userRejected                    (1),
  83  *              resourcesNotAvailable           (2),
  84  *              rejectedForSymmetryBreaking     (3),
  85  *              lockedConferenceNotSupported    (4)
  86  *      },
  87  *      userData                        UserData OPTIONAL,
  88  *      ...
  89  * }
  90  *
  91  * ConferenceName ::= SEQUENCE
  92  * {
  93  *      numeric                         SimpleNumericString
  94  *      text                            SimpleTextString OPTIONAL,
  95  *      ...
  96  * }
  97  *
  98  * SimpleNumericString ::= NumericString (SIZE (1..255)) (FROM ("0123456789"))
  99  *
 100  * UserData ::= SET OF SEQUENCE
 101  * {
 102  *      key                             Key,
 103  *      value                           OCTET_STRING OPTIONAL
 104  * }
 105  *
 106  * H221NonStandardIdentifier ::= OCTET STRING (SIZE (4..255))
 107  *
 108  * UserID ::= DynamicChannelID
 109  *
 110  * ChannelID ::= INTEGER (1..65535)
 111  * StaticChannelID ::= INTEGER (1..1000)
 112  * DynamicChannelID ::= INTEGER (1001..65535)
 113  *
 114  */
 115
 116 /*
 117  * OID = 0.0.20.124.0.1
 118  * { itu-t(0) recommendation(0) t(20) t124(124) version(0) 1 }
 119  * v.1 of ITU-T Recommendation T.124 (Feb 1998): "Generic Conference Control"
 120  */
 121 uint8 t124_02_98_oid[6] = { 0, 0, 20, 124, 0, 1 };
 122
 123 uint8 h221_cs_key[4] = "Duca";
 124 uint8 h221_sc_key[4] = "McDn";
 125
 126 /**
 127  * Read a GCC Conference Create Request.\n
 128  * @msdn{cc240836}
 129  * @param s stream
 130  * @param settings rdp settings
 131  */
 132
 133 boolean gcc_read_conference_create_request(STREAM* s, rdpSettings* settings)
 134 {
 135         uint16 length;
 136         uint8 choice;
 137         uint8 number;
 138         uint8 selection;
 139
 140         /* ConnectData */
 141         if (!per_read_choice(s, &choice))
 142                 return False;
 143         if (!per_read_object_identifier(s, t124_02_98_oid))
 144                 return False;
 145
 146         /* ConnectData::connectPDU (OCTET_STRING) */
 147         if (!per_read_length(s, &length))
 148                 return False;
 149
 150         /* ConnectGCCPDU */
 151         if (!per_read_choice(s, &choice))
 152                 return False;
 153         if (!per_read_selection(s, &selection))
 154                 return False;
 155
 156         /* ConferenceCreateRequest::conferenceName */
 157         if (!per_read_numeric_string(s, 1)) /* ConferenceName::numeric */
 158                 return False;
 159         if (!per_read_padding(s, 1)) /* padding */
 160                 return False;
 161
 162         /* UserData (SET OF SEQUENCE) */
 163         if (!per_read_number_of_sets(s, &number) || number != 1) /* one set of UserData */
 164                 return False;
 165         if (!per_read_choice(s, &choice) || choice != 0xC0) /* UserData::value present + select h221NonStandard (1) */
 166                 return False;
 167
 168         /* h221NonStandard */
 169         if (!per_read_octet_string(s, h221_cs_key, 4, 4)) /* h221NonStandard, client-to-server H.221 key, "Duca" */
 170                 return False;
 171
 172         /* userData::value (OCTET_STRING) */
 173         if (!per_read_length(s, &length))
 174                 return False;
 175         if (stream_get_left(s) < length)
 176                 return False;
 177         if (!gcc_read_client_data_blocks(s, settings, length))
 178                 return False;
 179
 180         return True;
 181 }
 182
 183 /**
 184  * Write a GCC Conference Create Request.\n
 185  * @msdn{cc240836}
 186  * @param s stream
 187  * @param user_data client data blocks
 188  */
 189
 190 void gcc_write_conference_create_request(STREAM* s, STREAM* user_data)
 191 {
 192         /* ConnectData */
 193         per_write_choice(s, 0); /* From Key select object (0) of type OBJECT_IDENTIFIER */
 194         per_write_object_identifier(s, t124_02_98_oid); /* ITU-T T.124 (02/98) OBJECT_IDENTIFIER */
 195
 196         /* ConnectData::connectPDU (OCTET_STRING) */
 197         per_write_length(s, stream_get_length(user_data) + 14); /* connectPDU length */
 198
 199         /* ConnectGCCPDU */
 200         per_write_choice(s, 0); /* From ConnectGCCPDU select conferenceCreateRequest (0) of type ConferenceCreateRequest */
 201         per_write_selection(s, 0x08); /* select optional userData from ConferenceCreateRequest */
 202
 203         /* ConferenceCreateRequest::conferenceName */
 204         per_write_numeric_string(s, (uint8*)"1", 1, 1); /* ConferenceName::numeric */
 205         per_write_padding(s, 1); /* padding */
 206
 207         /* UserData (SET OF SEQUENCE) */
 208         per_write_number_of_sets(s, 1); /* one set of UserData */
 209         per_write_choice(s, 0xC0); /* UserData::value present + select h221NonStandard (1) */
 210
 211         /* h221NonStandard */
 212         per_write_octet_string(s, h221_cs_key, 4, 4); /* h221NonStandard, client-to-server H.221 key, "Duca" */
 213
 214         /* userData::value (OCTET_STRING) */
 215         per_write_octet_string(s, user_data->data, stream_get_length(user_data), 0); /* array of client data blocks */
 216 }
 217
 218 void gcc_read_conference_create_response(STREAM* s, rdpSettings* settings)
 219 {
 220         uint16 length;
 221         uint32 tag;
 222         uint16 nodeID;
 223         uint8 result;
 224         uint8 choice;
 225         uint8 number;
 226
 227         /* ConnectData */
 228         per_read_choice(s, &choice);
 229         per_read_object_identifier(s, t124_02_98_oid);
 230
 231         /* ConnectData::connectPDU (OCTET_STRING) */
 232         per_read_length(s, &length);
 233
 234         /* ConnectGCCPDU */
 235         per_read_choice(s, &choice);
 236
 237         /* ConferenceCreateResponse::nodeID (UserID) */
 238         per_read_integer16(s, &nodeID, 1001);
 239
 240         /* ConferenceCreateResponse::tag (INTEGER) */
 241         per_read_integer(s, &tag);
 242
 243         /* ConferenceCreateResponse::result (ENUMERATED) */
 244         per_read_enumerated(s, &result, MCS_Result_enum_length);
 245
 246         /* number of UserData sets */
 247         per_read_number_of_sets(s, &number);
 248
 249         /* UserData::value present + select h221NonStandard (1) */
 250         per_read_choice(s, &choice);
 251
 252         /* h221NonStandard */
 253         per_read_octet_string(s, h221_sc_key, 4, 4); /* h221NonStandard, server-to-client H.221 key, "McDn" */
 254
 255         /* userData (OCTET_STRING) */
 256         per_read_length(s, &length);
 257         gcc_read_server_data_blocks(s, settings, length);
 258 }
 259
 260 void gcc_write_conference_create_response(STREAM* s, STREAM* user_data)
 261 {
 262         /* ConnectData */
 263         per_write_choice(s, 0);
 264         per_write_object_identifier(s, t124_02_98_oid);
 265
 266         /* ConnectData::connectPDU (OCTET_STRING) */
 267         per_write_length(s, stream_get_length(user_data) + 2);
 268
 269         /* ConnectGCCPDU */
 270         per_write_choice(s, 0x14);
 271
 272         /* ConferenceCreateResponse::nodeID (UserID) */
 273         per_write_integer16(s, 0x79F3, 1001);
 274
 275         /* ConferenceCreateResponse::tag (INTEGER) */
 276         per_write_integer(s, 1);
 277
 278         /* ConferenceCreateResponse::result (ENUMERATED) */
 279         per_write_enumerated(s, 0, MCS_Result_enum_length);
 280
 281         /* number of UserData sets */
 282         per_write_number_of_sets(s, 1);
 283
 284         /* UserData::value present + select h221NonStandard (1) */
 285         per_write_choice(s, 0xC0);
 286
 287         /* h221NonStandard */
 288         per_write_octet_string(s, h221_sc_key, 4, 4); /* h221NonStandard, server-to-client H.221 key, "McDn" */
 289
 290         /* userData (OCTET_STRING) */
 291         per_write_octet_string(s, user_data->data, stream_get_length(user_data), 0); /* array of server data blocks */
 292 }
 293
 294 boolean gcc_read_client_data_blocks(STREAM* s, rdpSettings *settings, int length)
 295 {
 296         uint16 type;
 297         uint16 blockLength;
 298         int pos;
 299
 300         while (length > 0)
 301         {
 302                 pos = stream_get_pos(s);
 303                 gcc_read_user_data_header(s, &type, &blockLength);
 304
 305                 switch (type)
 306                 {
 307                         case CS_CORE:
 308                                 if (!gcc_read_client_core_data(s, settings, blockLength - 4))
 309                                         return False;
 310                                 break;
 311
 312                         case CS_SECURITY:
 313                                 if (!gcc_read_client_security_data(s, settings, blockLength - 4))
 314                                         return False;
 315                                 break;
 316
 317                         case CS_NET:
 318                                 if (!gcc_read_client_network_data(s, settings, blockLength - 4))
 319                                         return False;
 320                                 break;
 321
 322                         case CS_CLUSTER:
 323                                 if (!gcc_read_client_cluster_data(s, settings, blockLength - 4))
 324                                         return False;
 325                                 break;
 326
 327                         case CS_MONITOR:
 328                                 if (!gcc_read_client_monitor_data(s, settings, blockLength - 4))
 329                                         return False;
 330                                 break;
 331
 332                         default:
 333                                 break;
 334                 }
 335
 336                 length -= blockLength;
 337                 stream_set_pos(s, pos + blockLength);
 338         }
 339
 340         return True;
 341 }
 342
 343 void gcc_write_client_data_blocks(STREAM* s, rdpSettings *settings)
 344 {
 345         gcc_write_client_core_data(s, settings);
 346         gcc_write_client_cluster_data(s, settings);
 347         gcc_write_client_security_data(s, settings);
 348         gcc_write_client_network_data(s, settings);
 349         gcc_write_client_monitor_data(s, settings);
 350 }
 351
 352 void gcc_read_server_data_blocks(STREAM* s, rdpSettings *settings, int length)
 353 {
 354         uint16 type;
 355         uint16 offset = 0;
 356         uint16 blockLength;
 357
 358         while (offset < length)
 359         {
 360                 gcc_read_user_data_header(s, &type, &blockLength);
 361
 362                 switch (type)
 363                 {
 364                         case SC_CORE:
 365                                 gcc_read_server_core_data(s, settings);
 366                                 break;
 367
 368                         case SC_SECURITY:
 369                                 gcc_read_server_security_data(s, settings);
 370                                 break;
 371
 372                         case SC_NET:
 373                                 gcc_read_server_network_data(s, settings);
 374                                 break;
 375
 376                         default:
 377                                 break;
 378                 }
 379
 380                 offset += blockLength;
 381         }
 382 }
 383
 384 void gcc_write_server_data_blocks(STREAM* s, rdpSettings *settings)
 385 {
 386         gcc_write_server_core_data(s, settings);
 387         gcc_write_server_network_data(s, settings);
 388         gcc_write_server_security_data(s, settings);
 389 }
 390
 391 void gcc_read_user_data_header(STREAM* s, uint16* type, uint16* length)
 392 {
 393         stream_read_uint16(s, *type); /* type */
 394         stream_read_uint16(s, *length); /* length */
 395 }
 396
 397 /**
 398  * Write a user data header (TS_UD_HEADER).\n
 399  * @msdn{cc240509}
 400  * @param s stream
 401  * @param type data block type
 402  * @param length data block length
 403  */
 404
 405 void gcc_write_user_data_header(STREAM* s, uint16 type, uint16 length)
 406 {
 407         stream_write_uint16(s, type); /* type */
 408         stream_write_uint16(s, length); /* length */
 409 }
 410
 411 /**
 412  * Read a client core data block (TS_UD_CS_CORE).\n
 413  * @msdn{cc240510}
 414  * @param s stream
 415  * @param settings rdp settings
 416  */
 417
 418 boolean gcc_read_client_core_data(STREAM* s, rdpSettings *settings, uint16 blockLength)
 419 {
 420         uint32 version;
 421         uint16 colorDepth = 0;
 422         uint16 postBeta2ColorDepth = 0;
 423         uint16 highColorDepth = 0;
 424         uint16 supportedColorDepths = 0;
 425         uint16 earlyCapabilityFlags = 0;
 426         uint32 serverSelectedProtocol = 0;
 427         char* str;
 428
 429         /* Length of all required fields, until imeFileName */
 430         if (blockLength < 128)
 431                 return False;
 432
 433         stream_read_uint32(s, version); /* version */
 434         settings->rdp_version = (version == RDP_VERSION_4 ? 4 : 7);
 435
 436         stream_read_uint16(s, settings->width); /* desktopWidth */
 437         stream_read_uint16(s, settings->height); /* desktopHeight */
 438         stream_read_uint16(s, colorDepth); /* colorDepth */
 439         stream_seek_uint16(s); /* SASSequence (Secure Access Sequence) */
 440         stream_read_uint32(s, settings->kbd_layout); /* keyboardLayout */
 441         stream_read_uint32(s, settings->client_build); /* clientBuild */
 442
 443         /* clientName (32 bytes, null-terminated unicode, truncated to 15 characters) */
 444         str = freerdp_uniconv_in(settings->uniconv, stream_get_tail(s), 32);
 445         stream_seek(s, 32);
 446         snprintf(settings->client_hostname, sizeof(settings->client_hostname), "%s", str);
 447         xfree(str);
 448
 449         stream_read_uint32(s, settings->kbd_type); /* keyboardType */
 450         stream_read_uint32(s, settings->kbd_subtype); /* keyboardSubType */
 451         stream_read_uint32(s, settings->kbd_fn_keys); /* keyboardFunctionKey */
 452
 453         stream_seek(s, 64); /* imeFileName */
 454
 455         blockLength -= 128;
 456
 457         /**
 458          * The following fields are all optional. If one field is present, all of the preceding
 459          * fields MUST also be present. If one field is not present, all of the subsequent fields
 460          * MUST NOT be present.
 461          * We must check the bytes left before reading each field.
 462          */
 463
 464         do
 465         {
 466                 if (blockLength < 2)
 467                         break;
 468                 stream_read_uint16(s, postBeta2ColorDepth); /* postBeta2ColorDepth */
 469                 blockLength -= 2;
 470
 471                 if (blockLength < 2)
 472                         break;
 473                 stream_seek_uint16(s); /* clientProductID */
 474                 blockLength -= 2;
 475
 476                 if (blockLength < 4)
 477                         break;
 478                 stream_seek_uint32(s); /* serialNumber */
 479                 blockLength -= 4;
 480
 481                 if (blockLength < 2)
 482                         break;
 483                 stream_read_uint16(s, highColorDepth); /* highColorDepth */
 484                 blockLength -= 2;
 485
 486                 if (blockLength < 2)
 487                         break;
 488                 stream_read_uint16(s, supportedColorDepths); /* supportedColorDepths */
 489                 blockLength -= 2;
 490
 491                 if (blockLength < 2)
 492                         break;
 493                 stream_read_uint16(s, earlyCapabilityFlags); /* earlyCapabilityFlags */
 494                 blockLength -= 2;
 495
 496                 if (blockLength < 64)
 497                         break;
 498                 str = freerdp_uniconv_in(settings->uniconv, stream_get_tail(s), 64);
 499                 stream_seek(s, 64);
 500                 snprintf(settings->client_product_id, sizeof(settings->client_product_id), "%s", str);
 501                 xfree(str);
 502                 blockLength -= 64;
 503
 504                 if (blockLength < 1)
 505                         break;
 506                 stream_read_uint8(s, settings->performance_flags); /* connectionType */
 507                 blockLength -= 1;
 508
 509                 if (blockLength < 1)
 510                         break;
 511                 stream_seek_uint8(s); /* pad1octet */
 512                 blockLength -= 1;
 513
 514                 if (blockLength < 4)
 515                         break;
 516                 stream_read_uint32(s, serverSelectedProtocol); /* serverSelectedProtocol */
 517                 blockLength -= 4;
 518
 519                 if (settings->selected_protocol != serverSelectedProtocol)
 520                         return False;
 521         } while (0);
 522
 523         if (highColorDepth > 0)
 524                 settings->color_depth = highColorDepth;
 525         else if (postBeta2ColorDepth > 0)
 526         {
 527                 switch (postBeta2ColorDepth)
 528                 {
 529                         case RNS_UD_COLOR_4BPP:
 530                                 settings->color_depth = 4;
 531                                 break;
 532                         case RNS_UD_COLOR_8BPP:
 533                                 settings->color_depth = 8;
 534                                 break;
 535                         case RNS_UD_COLOR_16BPP_555:
 536                                 settings->color_depth = 15;
 537                                 break;
 538                         case RNS_UD_COLOR_16BPP_565:
 539                                 settings->color_depth = 16;
 540                                 break;
 541                         case RNS_UD_COLOR_24BPP:
 542                                 settings->color_depth = 24;
 543                                 break;
 544                         default:
 545                                 return False;
 546                 }
 547         }
 548         else
 549         {
 550                 switch (colorDepth)
 551                 {
 552                         case RNS_UD_COLOR_4BPP:
 553                                 settings->color_depth = 4;
 554                                 break;
 555                         case RNS_UD_COLOR_8BPP:
 556                                 settings->color_depth = 8;
 557                                 break;
 558                         default:
 559                                 return False;
 560                 }
 561         }
 562
 563         return True;
 564 }
 565
 566 /**
 567  * Write a client core data block (TS_UD_CS_CORE).\n
 568  * @msdn{cc240510}
 569  * @param s stream
 570  * @param settings rdp settings
 571  */
 572
 573 void gcc_write_client_core_data(STREAM* s, rdpSettings *settings)
 574 {
 575         uint32 version;
 576         char* clientName;
 577         size_t clientNameLength;
 578         uint8 connectionType;
 579         uint16 highColorDepth;
 580         uint16 supportedColorDepths;
 581         uint16 earlyCapabilityFlags;
 582         char* clientDigProductId;
 583         size_t clientDigProductIdLength;
 584
 585         gcc_write_user_data_header(s, CS_CORE, 216);
 586
 587         version = settings->rdp_version >= 5 ? RDP_VERSION_5_PLUS : RDP_VERSION_4;
 588         clientName = freerdp_uniconv_out(settings->uniconv, settings->client_hostname, &clientNameLength);
 589         clientDigProductId = freerdp_uniconv_out(settings->uniconv, settings->client_product_id, &clientDigProductIdLength);
 590
 591         stream_write_uint32(s, version); /* version */
 592         stream_write_uint16(s, settings->width); /* desktopWidth */
 593         stream_write_uint16(s, settings->height); /* desktopHeight */
 594         stream_write_uint16(s, RNS_UD_COLOR_8BPP); /* colorDepth, ignored because of postBeta2ColorDepth */
 595         stream_write_uint16(s, RNS_UD_SAS_DEL); /* SASSequence (Secure Access Sequence) */
 596         stream_write_uint32(s, settings->kbd_layout); /* keyboardLayout */
 597         stream_write_uint32(s, settings->client_build); /* clientBuild */
 598
 599         /* clientName (32 bytes, null-terminated unicode, truncated to 15 characters) */
 600         if (clientNameLength > 30)
 601         {
 602                 clientNameLength = 30;
 603                 clientName[clientNameLength] = 0;
 604                 clientName[clientNameLength + 1] = 0;
 605         }
 606         stream_write(s, clientName, clientNameLength + 2);
 607         stream_write_zero(s, 32 - clientNameLength - 2);
 608         xfree(clientName);
 609
 610         stream_write_uint32(s, settings->kbd_type); /* keyboardType */
 611         stream_write_uint32(s, settings->kbd_subtype); /* keyboardSubType */
 612         stream_write_uint32(s, settings->kbd_fn_keys); /* keyboardFunctionKey */
 613
 614         stream_write_zero(s, 64); /* imeFileName */
 615
 616         stream_write_uint16(s, RNS_UD_COLOR_8BPP); /* postBeta2ColorDepth */
 617         stream_write_uint16(s, 1); /* clientProductID */
 618         stream_write_uint32(s, 0); /* serialNumber (should be initialized to 0) */
 619
 620         highColorDepth = MIN(settings->color_depth, 24);
 621
 622         supportedColorDepths =
 623                         RNS_UD_24BPP_SUPPORT |
 624                         RNS_UD_16BPP_SUPPORT |
 625                         RNS_UD_15BPP_SUPPORT;
 626
 627         connectionType = 0;
 628         earlyCapabilityFlags = RNS_UD_CS_SUPPORT_ERRINFO_PDU;
 629
 630         if (settings->performance_flags == PERF_FLAG_NONE)
 631         {
 632                 earlyCapabilityFlags |= RNS_UD_CS_VALID_CONNECTION_TYPE;
 633                 connectionType = CONNECTION_TYPE_LAN;
 634         }
 635
 636         if (settings->color_depth == 32)
 637         {
 638                 supportedColorDepths |= RNS_UD_32BPP_SUPPORT;
 639                 earlyCapabilityFlags |= RNS_UD_CS_WANT_32BPP_SESSION;
 640         }
 641
 642         stream_write_uint16(s, highColorDepth); /* highColorDepth */
 643         stream_write_uint16(s, supportedColorDepths); /* supportedColorDepths */
 644
 645         stream_write_uint16(s, earlyCapabilityFlags); /* earlyCapabilityFlags */
 646
 647         /* clientDigProductId (64 bytes, null-terminated unicode, truncated to 30 characters) */
 648         if (clientDigProductIdLength > 62)
 649         {
 650                 clientDigProductIdLength = 62;
 651                 clientDigProductId[clientDigProductIdLength] = 0;
 652                 clientDigProductId[clientDigProductIdLength + 1] = 0;
 653         }
 654         stream_write(s, clientDigProductId, clientDigProductIdLength + 2);
 655         stream_write_zero(s, 64 - clientDigProductIdLength - 2);
 656         xfree(clientDigProductId);
 657
 658         stream_write_uint8(s, connectionType); /* connectionType */
 659         stream_write_uint8(s, 0); /* pad1octet */
 660
 661         stream_write_uint32(s, settings->selected_protocol); /* serverSelectedProtocol */
 662 }
 663
 664 void gcc_read_server_core_data(STREAM* s, rdpSettings *settings)
 665 {
 666         uint32 version;
 667         uint32 clientRequestedProtocols;
 668
 669         stream_read_uint32(s, version); /* version */
 670         stream_read_uint32(s, clientRequestedProtocols); /* clientRequestedProtocols */
 671
 672         if (version == RDP_VERSION_4 && settings->rdp_version > 4)
 673                 settings->rdp_version = 4;
 674         else if (version == RDP_VERSION_5_PLUS && settings->rdp_version < 5)
 675                 settings->rdp_version = 7;
 676 }
 677
 678 void gcc_write_server_core_data(STREAM* s, rdpSettings *settings)
 679 {
 680         gcc_write_user_data_header(s, SC_CORE, 12);
 681
 682         stream_write_uint32(s, settings->rdp_version == 4 ? RDP_VERSION_4 : RDP_VERSION_5_PLUS);
 683         stream_write_uint32(s, settings->requested_protocols); /* clientRequestedProtocols */
 684 }
 685
 686 /**
 687  * Read a client security data block (TS_UD_CS_SEC).\n
 688  * @msdn{cc240511}
 689  * @param s stream
 690  * @param settings rdp settings
 691  */
 692
 693 boolean gcc_read_client_security_data(STREAM* s, rdpSettings *settings, uint16 blockLength)
 694 {
 695         if (blockLength < 8)
 696                 return False;
 697
 698         stream_read_uint32(s, settings->encryption_method); /* encryptionMethods */
 699         if (settings->encryption_method == 0)
 700                 stream_read_uint32(s, settings->encryption_method); /* extEncryptionMethods */
 701
 702         return True;
 703 }
 704
 705 /**
 706  * Write a client security data block (TS_UD_CS_SEC).\n
 707  * @msdn{cc240511}
 708  * @param s stream
 709  * @param settings rdp settings
 710  */
 711
 712 void gcc_write_client_security_data(STREAM* s, rdpSettings *settings)
 713 {
 714         gcc_write_user_data_header(s, CS_SECURITY, 12);
 715
 716         if (settings->encryption > 0)
 717         {
 718                 stream_write_uint32(s, settings->encryption_method); /* encryptionMethods */
 719                 stream_write_uint32(s, 0); /* extEncryptionMethods */
 720         }
 721         else
 722         {
 723                 /* French locale, disable encryption */
 724                 stream_write_uint32(s, 0); /* encryptionMethods */
 725                 stream_write_uint32(s, settings->encryption_method); /* extEncryptionMethods */
 726         }
 727 }
 728
 729 void gcc_read_server_security_data(STREAM* s, rdpSettings *settings)
 730 {
 731         uint32 encryptionMethod;
 732         uint32 encryptionLevel;
 733         uint32 serverRandomLen;
 734         uint32 serverCertLen;
 735
 736         stream_read_uint32(s, encryptionMethod); /* encryptionMethod */
 737         stream_read_uint32(s, encryptionLevel); /* encryptionLevel */
 738         stream_read_uint32(s, serverRandomLen); /* serverRandomLen */
 739         stream_read_uint32(s, serverCertLen); /* serverCertLen */
 740
 741         if (encryptionMethod == 0 && encryptionLevel == 0)
 742         {
 743                 /* serverRandom and serverRandom must not be present */
 744                 return;
 745         }
 746
 747         if (serverRandomLen > 0)
 748         {
 749                 /* serverRandom */
 750                 freerdp_blob_alloc(&settings->server_random, serverRandomLen);
 751                 memcpy(settings->server_random.data, s->p, serverRandomLen);
 752                 stream_seek(s, serverRandomLen);
 753         }
 754
 755         if (serverCertLen > 0)
 756         {
 757                 /* serverCertificate */
 758                 freerdp_blob_alloc(&settings->server_certificate, serverCertLen);
 759                 memcpy(settings->server_certificate.data, s->p, serverCertLen);
 760                 stream_seek(s, serverCertLen);
 761         }
 762 }
 763
 764 void gcc_write_server_security_data(STREAM* s, rdpSettings *settings)
 765 {
 766         gcc_write_user_data_header(s, SC_SECURITY, 12);
 767
 768         stream_write_uint32(s, ENCRYPTION_METHOD_NONE); /* encryptionMethod */
 769         stream_write_uint32(s, ENCRYPTION_LEVEL_NONE); /* encryptionLevel */
 770 #if 0
 771         stream_write_uint32(s, 0); /* serverRandomLen */
 772         stream_write_uint32(s, 0); /* serverCertLen */
 773 #endif
 774 }
 775
 776 /**
 777  * Read a client network data block (TS_UD_CS_NET).\n
 778  * @msdn{cc240512}
 779  * @param s stream
 780  * @param settings rdp settings
 781  */
 782
 783 boolean gcc_read_client_network_data(STREAM* s, rdpSettings *settings, uint16 blockLength)
 784 {
 785         int i;
 786
 787         if (blockLength < 4)
 788                 return False;
 789
 790         stream_read_uint32(s, settings->num_channels); /* channelCount */
 791         if (blockLength < 4 + settings->num_channels * 12)
 792                 return False;
 793         if (settings->num_channels > 16)
 794                 return False;
 795
 796         /* channelDefArray */
 797         for (i = 0; i < settings->num_channels; i++)
 798         {
 799                 /* CHANNEL_DEF */
 800                 stream_read(s, settings->channels[i].name, 8); /* name (8 bytes) */
 801                 stream_read_uint32(s, settings->channels[i].options); /* options (4 bytes) */
 802                 settings->channels[i].chan_id = MCS_GLOBAL_CHANNEL_ID + 1 + i;
 803         }
 804
 805         return True;
 806 }
 807
 808 /**
 809  * Write a client network data block (TS_UD_CS_NET).\n
 810  * @msdn{cc240512}
 811  * @param s stream
 812  * @param settings rdp settings
 813  */
 814
 815 void gcc_write_client_network_data(STREAM* s, rdpSettings *settings)
 816 {
 817         int i;
 818         uint16 length;
 819
 820         if (settings->num_channels > 0)
 821         {
 822                 length = settings->num_channels * 12 + 8;
 823                 gcc_write_user_data_header(s, CS_NET, length);
 824
 825                 stream_write_uint32(s, settings->num_channels); /* channelCount */
 826
 827                 /* channelDefArray */
 828                 for (i = 0; i < settings->num_channels; i++)
 829                 {
 830                         /* CHANNEL_DEF */
 831                         stream_write(s, settings->channels[i].name, 8); /* name (8 bytes) */
 832                         stream_write_uint32(s, settings->channels[i].options); /* options (4 bytes) */
 833                 }
 834         }
 835 }
 836
 837 void gcc_read_server_network_data(STREAM* s, rdpSettings *settings)
 838 {
 839         int i;
 840         uint16 MCSChannelId;
 841         uint16 channelCount;
 842         uint16 channelId;
 843
 844         stream_read_uint16(s, MCSChannelId); /* MCSChannelId */
 845         stream_read_uint16(s, channelCount); /* channelCount */
 846
 847         if (channelCount != settings->num_channels)
 848         {
 849                 printf("requested %d channels, got %d instead\n",
 850                                 settings->num_channels, channelCount);
 851         }
 852
 853         for (i = 0; i < channelCount; i++)
 854         {
 855                 stream_read_uint16(s, channelId); /* channelId */
 856                 settings->channels[i].chan_id = channelId;
 857         }
 858
 859         if (channelCount % 2 == 1)
 860                 stream_seek(s, 2); /* padding */
 861 }
 862
 863 void gcc_write_server_network_data(STREAM* s, rdpSettings *settings)
 864 {
 865         int i;
 866
 867         gcc_write_user_data_header(s, SC_NET, 8 + settings->num_channels * 2 + (settings->num_channels % 2 == 1 ? 2 : 0));
 868
 869         stream_write_uint16(s, MCS_GLOBAL_CHANNEL_ID); /* MCSChannelId */
 870         stream_write_uint16(s, settings->num_channels); /* channelCount */
 871
 872         for (i = 0; i < settings->num_channels; i++)
 873         {
 874                 stream_write_uint16(s, settings->channels[i].chan_id);
 875         }
 876
 877         if (settings->num_channels % 2 == 1)
 878                 stream_write_uint16(s, 0);
 879 }
 880
 881 /**
 882  * Read a client cluster data block (TS_UD_CS_CLUSTER).\n
 883  * @msdn{cc240514}
 884  * @param s stream
 885  * @param settings rdp settings
 886  */
 887
 888 boolean gcc_read_client_cluster_data(STREAM* s, rdpSettings *settings, uint16 blockLength)
 889 {
 890         uint32 flags;
 891
 892         if (blockLength < 8)
 893                 return False;
 894
 895         stream_read_uint32(s, flags); /* flags */
 896
 897         if ((flags | REDIRECTED_SESSIONID_FIELD_VALID))
 898                 stream_read_uint32(s, settings->redirected_session_id); /* redirectedSessionID */
 899
 900         return True;
 901 }
 902
 903 /**
 904  * Write a client cluster data block (TS_UD_CS_CLUSTER).\n
 905  * @msdn{cc240514}
 906  * @param s stream
 907  * @param settings rdp settings
 908  */
 909
 910 void gcc_write_client_cluster_data(STREAM* s, rdpSettings *settings)
 911 {
 912         uint32 flags;
 913
 914         gcc_write_user_data_header(s, CS_CLUSTER, 12);
 915
 916         flags = REDIRECTION_SUPPORTED | (REDIRECTION_VERSION4 << 2);
 917
 918         if (settings->console_session || settings->redirected_session_id)
 919                 flags |= REDIRECTED_SESSIONID_FIELD_VALID;
 920
 921         stream_write_uint32(s, flags); /* flags */
 922         stream_write_uint32(s, settings->redirected_session_id); /* redirectedSessionID */
 923 }
 924
 925 /**
 926  * Read a client monitor data block (TS_UD_CS_MONITOR).\n
 927  * @msdn{dd305336}
 928  * @param s stream
 929  * @param settings rdp settings
 930  */
 931
 932 boolean gcc_read_client_monitor_data(STREAM* s, rdpSettings *settings, uint16 blockLength)
 933 {
 934         printf("CS_MONITOR\n");
 935         return True;
 936 }
 937
 938 /**
 939  * Write a client monitor data block (TS_UD_CS_MONITOR).\n
 940  * @msdn{dd305336}
 941  * @param s stream
 942  * @param settings rdp settings
 943  */
 944
 945 void gcc_write_client_monitor_data(STREAM* s, rdpSettings *settings)
 946 {
 947         int i;
 948         uint16 length;
 949         uint32 left, top, right, bottom, flags;
 950
 951         if (settings->num_monitors > 1)
 952         {
 953                 length = (20 * settings->num_monitors) + 12;
 954                 gcc_write_user_data_header(s, CS_MONITOR, length);
 955
 956                 stream_write_uint32(s, 0); /* flags */
 957                 stream_write_uint32(s, settings->num_monitors); /* monitorCount */
 958
 959                 for (i = 0; i < settings->num_monitors; i++)
 960                 {
 961                         left = settings->monitors[i].x;
 962                         top = settings->monitors[i].y;
 963                         right = settings->monitors[i].x + settings->monitors[i].width - 1;
 964                         bottom = settings->monitors[i].y + settings->monitors[i].height - 1;
 965                         flags = settings->monitors[i].is_primary ? MONITOR_PRIMARY : 0;
 966
 967                         stream_write_uint32(s, left); /* left */
 968                         stream_write_uint32(s, top); /* top */
 969                         stream_write_uint32(s, right); /* right */
 970                         stream_write_uint32(s, bottom); /* bottom */
 971                         stream_write_uint32(s, flags); /* flags */
 972                 }
 973         }
 974 }
 975