2.2.1.3.5 Client Cluster Data (TS_UD_CS_CLUSTER)
The TS_UD_CS_CLUSTER data block is sent by the client to the server either to advertise that it can support the Server Redirection PDUs (sections 2.2.13.2 and 2.2.13.3) or to request a connection to a given session identifier.
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RedirectedSessionID |
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header (4 bytes): A GCC user data block header, as specified in User Data Header (section 2.2.1.3.1). The User Data Header type field MUST be set to CS_CLUSTER (0xC004).
Flags (4 bytes): A 32-bit, unsigned integer. Cluster information flags.
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Flag
Meaning
REDIRECTION_SUPPORTED
0x00000001
The client can receive server session redirection packets. If this flag is set, the ServerSessionRedirectionVersionMask MUST contain the server session redirection version that the client supports.
ServerSessionRedirectionVersionMask
0x0000003C
The server session redirection version that the client supports. See the discussion which follows this table for more information.
REDIRECTED_SESSIONID_FIELD_VALID
0x00000002
The RedirectedSessionID field contains an ID that identifies a session on the server to associate with the connection.
REDIRECTED_SMARTCARD
0x00000040
The client logged on with a smart card.
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The ServerSessionRedirectionVersionMask is a 4-bit enumerated value containing the server session redirection version supported by the client. The following are possible version values.
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Value
Meaning
REDIRECTION_VERSION1
0x00
If REDIRECTION_SUPPORTED is set, server session redirection version 1 is supported by the client.<8>
REDIRECTION_VERSION2
0x01
If REDIRECTION_SUPPORTED is set, server session redirection version 2 is supported by the client.<9>
REDIRECTION_VERSION3
0x02
If REDIRECTION_SUPPORTED is set, server session redirection version 3 is supported by the client.<10>
REDIRECTION_VERSION4
0x03
If REDIRECTION_SUPPORTED is set, server session redirection version 4 is supported by the client.<11>
REDIRECTION_VERSION5
0x04
If REDIRECTION_SUPPORTED is set, server session redirection version 5 is supported by the client.<12>
REDIRECTION_VERSION6
0x05
If REDIRECTION_SUPPORTED is set, server session redirection version 6 is supported by the client.<13>
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The version values cannot be combined; only one value MUST be specified if the REDIRECTED_SESSIONID_FIELD_VALID (0x00000002) flag is present in the Flags field.
RedirectedSessionID (4 bytes): A 32-bit, unsigned integer. If the REDIRECTED_SESSIONID_FIELD_VALID flag is set in the Flags field, then the RedirectedSessionID field contains a valid session identifier to which the client requests to connect.