2.2.3.1.1.1 TransactionPropCallHeader

The TransactionPropCallHeader structure is used to pass the TSN of the current transaction to the server.

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m_usMaxVer																m_usMinVer
m_ulSeq
m_usFlags																m_usVariant

m_usMaxVer (2 bytes): The major version number for this TransactionPropCallHeader format. This field MUST be set to 0x0001.

m_usMinVer (2 bytes): The minor version number for this TransactionPropCallHeader format; this field MUST be set to 0x0001.

m_ulSeq (4 bytes): The sequence number of the current transaction.

m_usFlags (2 bytes): This MUST contain one of the following values:

Value	Meaning
TransactionPropCallFlag_None 0x0000	A request that the server MUST return a TransactionPropRetHeader structure with the m_usVariant field set to TransactionPropCall_None, as specified in section 2.2.3.1.2.1.
TransactionPropCallFlag_NeedWhereabouts 0x0001	A request that the server MUST return a TransactionPropRetHeader structure with the m_usVariant field set to TransactionPropRet_Whereabouts, as specified in section 2.2.3.1.2.1.

m_usVariant (2 bytes): This MUST contain one of the following values:

Value	Meaning
TransactionPropCall_None 0x0001	The TransactionPropCallHeader structure MUST NOT be contained within any larger structures.
TransactionPropCall_ExportCookie 0x0002	The TransactionPropCallHeader structure MUST be contained as part of the TransactionPropCallExportCookie (section 2.2.3.1.1.2) structure.
TransactionPropCall_TransmitterBuffer 0x0003	The TransactionPropCallHeader structure MUST be contained as part of the TransactionPropCallTransmitterBuffer (section 2.2.3.1.1.3) structure.