2.2.1.12.1.1 Licensing Preamble (LICENSE_PREAMBLE)
The LICENSE_PREAMBLE structure precedes every licensing packet sent on the wire.
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bMsgType |
flags |
wMsgSize |
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bMsgType (1 byte): An 8-bit, unsigned integer. A type of the licensing packet. For more details about the different licensing packets, see [MS-RDPELE] section 2.2.2.
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Sent by server:
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Value
Meaning
LICENSE_REQUEST
0x01
Indicates a License Request PDU ([MS-RDPELE] section 2.2.2.1).
PLATFORM_CHALLENGE
0x02
Indicates a Platform Challenge PDU ([MS-RDPELE] section 2.2.2.4).
NEW_LICENSE
0x03
Indicates a New License PDU ([MS-RDPELE] section 2.2.2.7).
UPGRADE_LICENSE
0x04
Indicates an Upgrade License PDU ([MS-RDPELE] section 2.2.2.6).
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Sent by client:
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Value
Meaning
LICENSE_INFO
0x12
Indicates a License Information PDU ([MS-RDPELE] section 2.2.2.3).
NEW_LICENSE_REQUEST
0x13
Indicates a New License Request PDU ([MS-RDPELE] section 2.2.2.2).
PLATFORM_CHALLENGE_RESPONSE
0x15
Indicates a Platform Challenge Response PDU ([MS-RDPELE] section 2.2.2.5).
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Sent by either client or server:
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Value
Meaning
ERROR_ALERT
0xFF
Indicates a Licensing Error Message PDU (section 2.2.1.12.1.3).
flags (1 byte): An 8-bit, unsigned integer. License preamble flags.
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Value
Meaning
LicenseProtocolVersionMask
0x0F
The license protocol version. See the discussion which follows this table for more information.
EXTENDED_ERROR_MSG_SUPPORTED
0x80
Indicates that extended error information using the Licensing Error Message (section 2.2.1.12.1.3) is supported.
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The LicenseProtocolVersionMask is a 4-bit value containing the supported license protocol version. The following are possible version values.
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Value
Meaning
PREAMBLE_VERSION_2_0
0x2
RDP 4.0
PREAMBLE_VERSION_3_0
0x3
RDP 5.0, 5.1, 5.2, 6.0, 6.1, 7.0, 7.1, 8.0, 8.1, 10.0, 10.1, 10.2, 10.3, 10.4, and 10.5
wMsgSize (2 bytes): An 16-bit, unsigned integer. The size in bytes of the licensing packet (including the size of the preamble).