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PChannel.h

PChannel.h 8.3 KB
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  1. /****************************************************************************/
    2. 

  2. /* Header:    pchannel.h                                                    */
    3. 

  3. /*                                                                          */
    4. 

  4. /* Purpose:   Virtual Channel protocol header - VC stuff common to Client & */
    5. 

  5. /*            Server                                                        */
    6. 

  6. /*                                                                          */
    7. 

  7. /* Copyright(C) Microsoft Corporation 1999                                  */
    8. 

  8. /*                                                                          */
    9. 

  9. /****************************************************************************/
    10. 

  10. 

  11. #ifndef _H_PCHANNEL
    12. 

  12. #define _H_PCHANNEL
    13. 

  13. 

  14. /****************************************************************************/
    15. 

  15. /* Maximum amount of data that is sent in one operation.  Data larger than  */
    16. 

  16. /* this is segmented into chunks of this size and sent as multiple          */
    17. 

  17. /* operations.                                                              */
    18. 

  18. /****************************************************************************/
    19. 

  19. #define CHANNEL_CHUNK_LENGTH    1600
    20. 

  20. 

  21. #define CHANNEL_PDU_LENGTH (CHANNEL_CHUNK_LENGTH + sizeof(CHANNEL_PDU_HEADER))
    22. 

  22. 

  23. /****************************************************************************/
    24. 

  24. /* Header flags (also passed to VirtualChannelOpenEventFn)                  */
    25. 

  25. /****************************************************************************/
    26. 

  26. #define CHANNEL_FLAG_FIRST      0x01
    27. 

  27. #define CHANNEL_FLAG_LAST       0x02
    28. 

  28. #define CHANNEL_FLAG_ONLY       (CHANNEL_FLAG_FIRST | CHANNEL_FLAG_LAST)
    29. 

  29. #define CHANNEL_FLAG_MIDDLE     0
    30. 

  30. 

  31. #define CHANNEL_FLAG_FAIL       0x100
    32. 

  32. 

  33. /****************************************************************************/
    34. 

  34. /* Header flags (internal protocol use only)                                */
    35. 

  35. /****************************************************************************/
    36. 

  36. #define CHANNEL_FLAG_SHOW_PROTOCOL 0x10
    37. 

  37. #define CHANNEL_FLAG_SUSPEND       0x20
    38. 

  38. #define CHANNEL_FLAG_RESUME        0x40
    39. 

  39. 

  40. /****************************************************************************/
    41. 

  41. /* Virtual Channel options, passed by Client on VirtualChannelOpen          */
    42. 

  42. /****************************************************************************/
    43. 

  43. 

  44. /****************************************************************************/
    45. 

  45. /* Application is initialized.  If this flag is not set, a virtual channel  */
    46. 

  46. /* is not established for this application                                  */
    47. 

  47. /****************************************************************************/
    48. 

  48. #define CHANNEL_OPTION_INITIALIZED  0x80000000
    49. 

  49. 

  50. /****************************************************************************/
    51. 

  51. /* Encrypt according to RDP data encryption (ie if RDP data is encrypted,   */
    52. 

  52. /* do so for this virtual channel too)                                      */
    53. 

  53. /****************************************************************************/
    54. 

  54. #define CHANNEL_OPTION_ENCRYPT_RDP  0x40000000
    55. 

  55. 

  56. /****************************************************************************/
    57. 

  57. /* Encrypt Server to Client data (ignored if CHANNEL_OPTION_ENCRYPT_RDP is  */
    58. 

  58. /* set)                                                                     */
    59. 

  59. /****************************************************************************/
    60. 

  60. #define CHANNEL_OPTION_ENCRYPT_SC   0x20000000
    61. 

  61. 

  62. /****************************************************************************/
    63. 

  63. /* Encrypt Client to Server data (ignored if CHANNEL_OPTION_ENCRYPT_RDP is  */
    64. 

  64. /* set)                                                                     */
    65. 

  65. /****************************************************************************/
    66. 

  66. #define CHANNEL_OPTION_ENCRYPT_CS   0x10000000
    67. 

  67. 

  68. /****************************************************************************/
    69. 

  69. /* Send data at high priority (not recommended, as this may impact RDP      */
    70. 

  70. /* performance)                                                             */
    71. 

  71. /****************************************************************************/
    72. 

  72. #define CHANNEL_OPTION_PRI_HIGH     0x08000000
    73. 

  73. 

  74. /****************************************************************************/
    75. 

  75. /* Send data at medium priority                                             */
    76. 

  76. /****************************************************************************/
    77. 

  77. #define CHANNEL_OPTION_PRI_MED      0x04000000
    78. 

  78. 

  79. /****************************************************************************/
    80. 

  80. /* Send data at low priority                                                */
    81. 

  81. /****************************************************************************/
    82. 

  82. #define CHANNEL_OPTION_PRI_LOW      0x02000000
    83. 

  83. 

  84. /****************************************************************************/
    85. 

  85. /* Compress data in this virtual channel if RDP data compression is         */
    86. 

  86. /* configured for this connection                                           */
    87. 

  87. /****************************************************************************/
    88. 

  88. #define CHANNEL_OPTION_COMPRESS_RDP 0x00800000
    89. 

  89. 

  90. /****************************************************************************/
    91. 

  91. /* Compress data in this virtual channel, irrespective of RDP data          */
    92. 

  92. /* compression (ignored if CHANNEL_OPTION_COMPRESS_RDP is set)              */
    93. 

  93. /****************************************************************************/
    94. 

  94. #define CHANNEL_OPTION_COMPRESS     0x00400000
    95. 

  95. 

  96. /****************************************************************************/
    97. 

  97. /* Show Server addins the full Virtual Channel protocol.  This option       */
    98. 

  98. /* affects how data passed to VirtualChannelWrite is presented to Server    */
    99. 

  99. /* addins.                                                                  */
    100. 

  100. /*                                                                          */
    101. 

  101. /* - If this option is set, Server addins see the full Virtual Channel      */
    102. 

  102. /* protocol, including CHANNEL_PDU_HEADER (below).                          */
    103. 

  103. /*                                                                          */
    104. 

  104. /* -If this option is not set, Server addins see just the data passed to    */
    105. 

  105. /* VirtualChannelWrite                                                      */
    106. 

  106. /****************************************************************************/
    107. 

  107. #define CHANNEL_OPTION_SHOW_PROTOCOL 0x00200000
    108. 

  108. 

  109. /****************************************************************************/
    110. 

  110. /* Maximum number and size of channel names                                 */
    111. 

  111. /****************************************************************************/
    112. 

  112. #define CHANNEL_MAX_COUNT           30
    113. 

  113. #define CHANNEL_NAME_LEN             7
    114. 

  114. 

  115. /****************************************************************************/
    116. 

  116. /* Structure: CHANNEL_DEF                                                   */
    117. 

  117. /*                                                                          */
    118. 

  118. /* Description: Client to Server virtual channel information                */
    119. 

  119. /* - name       channel name                                                */
    120. 

  120. /* - options    channel options (a combination of the CHANNEL_OPTION        */
    121. 

  121. /*              constants above)                                            */
    122. 

  122. /****************************************************************************/
    123. 

  123. typedef struct tagCHANNEL_DEF
    124. 

  124. {
    125. 

  125.     char            name[CHANNEL_NAME_LEN + 1];
    126. 

  126.     ULONG           options;
    127. 

  127. } CHANNEL_DEF, FAR * PCHANNEL_DEF, FAR * FAR * PPCHANNEL_DEF;
    128. 

  128. 

  129. /****************************************************************************/
    130. 

  130. /* Header of Virtual Channel PDUs                                           */
    131. 

  131. /****************************************************************************/
    132. 

  132. /****************************************************************************/
    133. 

  133. /* Structure: CHANNEL_PDU_HEADER                                            */
    134. 

  134. /*                                                                          */
    135. 

  135. /* Description: Header sent on Virtual Channel PDUs                         */
    136. 

  136. /****************************************************************************/
    137. 

  137. typedef struct tagCHANNEL_PDU_HEADER
    138. 

  138. {
    139. 

  139.     UINT32    length;                 /* Length of data including header    */
    140. 

  140.     UINT32    flags;                  /* CHANNEL_FLAG_xxx flags             */
    141. 

  141. } CHANNEL_PDU_HEADER, FAR * PCHANNEL_PDU_HEADER;
    142. 

  142. /****************************************************************************/
    143. 

  143. 

  144. #endif /* _H_PCHANNEL */
    145.