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Leaked source code of windows server 2003
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windows-server-2003/public/internal/termsrv/inc/pchannel.h

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  1. /****************************************************************************/
  2. /* Header: pchannel.h */
  3. /* */
  4. /* Purpose: Virtual Channel protocol header - VC stuff common to Client & */
  5. /* Server */
  6. /* */
  7. /* Copyright(C) Microsoft Corporation 1999 */
  8. /* */
  9. /****************************************************************************/
  11. #ifndef _H_PCHANNEL
  12. #define _H_PCHANNEL
  14. /****************************************************************************/
  15. /* Maximum amount of data that is sent in one operation. Data larger than */
  16. /* this is segmented into chunks of this size and sent as multiple */
  17. /* operations. */
  18. /****************************************************************************/
  19. #define CHANNEL_CHUNK_LENGTH 1600
  21. #define CHANNEL_PDU_LENGTH (CHANNEL_CHUNK_LENGTH + sizeof(CHANNEL_PDU_HEADER))
  23. /****************************************************************************/
  24. /* Header flags (also passed to VirtualChannelOpenEventFn) */
  25. /****************************************************************************/
  26. #define CHANNEL_FLAG_FIRST 0x01
  27. #define CHANNEL_FLAG_LAST 0x02
  28. #define CHANNEL_FLAG_ONLY (CHANNEL_FLAG_FIRST | CHANNEL_FLAG_LAST)
  29. #define CHANNEL_FLAG_MIDDLE 0
  31. #define CHANNEL_FLAG_FAIL 0x100
  33. /****************************************************************************/
  34. /* Virtual Channel options, passed by Client on VirtualChannelOpen */
  35. /****************************************************************************/
  37. /****************************************************************************/
  38. /* Application is initialized. If this flag is not set, a virtual channel */
  39. /* is not established for this application */
  40. /****************************************************************************/
  41. #define CHANNEL_OPTION_INITIALIZED 0x80000000
  43. /****************************************************************************/
  44. /* Encrypt according to RDP data encryption (ie if RDP data is encrypted, */
  45. /* do so for this virtual channel too) */
  46. /****************************************************************************/
  47. #define CHANNEL_OPTION_ENCRYPT_RDP 0x40000000
  49. /****************************************************************************/
  50. /* Encrypt Server to Client data (ignored if CHANNEL_OPTION_ENCRYPT_RDP is */
  51. /* set) */
  52. /****************************************************************************/
  53. #define CHANNEL_OPTION_ENCRYPT_SC 0x20000000
  55. /****************************************************************************/
  56. /* Encrypt Client to Server data (ignored if CHANNEL_OPTION_ENCRYPT_RDP is */
  57. /* set) */
  58. /****************************************************************************/
  59. #define CHANNEL_OPTION_ENCRYPT_CS 0x10000000
  61. /****************************************************************************/
  62. /* Send data at high priority (not recommended, as this may impact RDP */
  63. /* performance) */
  64. /****************************************************************************/
  65. #define CHANNEL_OPTION_PRI_HIGH 0x08000000
  67. /****************************************************************************/
  68. /* Send data at medium priority */
  69. /****************************************************************************/
  70. #define CHANNEL_OPTION_PRI_MED 0x04000000
  72. /****************************************************************************/
  73. /* Send data at low priority */
  74. /****************************************************************************/
  75. #define CHANNEL_OPTION_PRI_LOW 0x02000000
  77. /****************************************************************************/
  78. /* Compress data in this virtual channel if RDP data compression is */
  79. /* configured for this connection */
  80. /****************************************************************************/
  81. #define CHANNEL_OPTION_COMPRESS_RDP 0x00800000
  83. /****************************************************************************/
  84. /* Compress data in this virtual channel, irrespective of RDP data */
  85. /* compression (ignored if CHANNEL_OPTION_COMPRESS_RDP is set) */
  86. /****************************************************************************/
  87. #define CHANNEL_OPTION_COMPRESS 0x00400000
  89. /****************************************************************************/
  90. /* Show Server addins the full Virtual Channel protocol. This option */
  91. /* affects how data passed to VirtualChannelWrite is presented to Server */
  92. /* addins. */
  93. /* */
  94. /* - If this option is set, Server addins see the full Virtual Channel */
  95. /* protocol, including CHANNEL_PDU_HEADER (below). */
  96. /* */
  97. /* -If this option is not set, Server addins see just the data passed to */
  98. /* VirtualChannelWrite */
  99. /****************************************************************************/
  100. #define CHANNEL_OPTION_SHOW_PROTOCOL 0x00200000
  102. /****************************************************************************/
  103. /* Specify that this channel is persistent accross remote control */
  104. /* transitions. */
  105. /****************************************************************************/
  106. #define CHANNEL_OPTION_REMOTE_CONTROL_PERSISTENT 0x00100000
  108. /****************************************************************************/
  109. /* Maximum number and size of channel names */
  110. /****************************************************************************/
  111. #define CHANNEL_MAX_COUNT 30
  112. #define CHANNEL_NAME_LEN 7
  114. /****************************************************************************/
  115. /* Structure: CHANNEL_DEF */
  116. /* */
  117. /* Description: Client to Server virtual channel information */
  118. /* - name channel name */
  119. /* - options channel options (a combination of the CHANNEL_OPTION */
  120. /* constants above) */
  121. /****************************************************************************/
  122. typedef struct tagCHANNEL_DEF
  123. {
  124. char name[CHANNEL_NAME_LEN + 1];
  125. ULONG options;
  126. } CHANNEL_DEF;
  127. typedef CHANNEL_DEF UNALIGNED FAR *PCHANNEL_DEF;
  128. typedef PCHANNEL_DEF UNALIGNED FAR *PPCHANNEL_DEF;
  130. /****************************************************************************/
  131. /* Header of Virtual Channel PDUs */
  132. /****************************************************************************/
  133. /****************************************************************************/
  134. /* Structure: CHANNEL_PDU_HEADER */
  135. /* */
  136. /* Description: Header sent on Virtual Channel PDUs */
  137. /****************************************************************************/
  138. typedef struct tagCHANNEL_PDU_HEADER
  139. {
  140. UINT32 length; /* Length of data including header */
  141. UINT32 flags; /* CHANNEL_FLAG_xxx flags */
  142. } CHANNEL_PDU_HEADER, FAR * PCHANNEL_PDU_HEADER;
  143. /****************************************************************************/
  145. #endif /* _H_PCHANNEL */