[MS-VDS]: Virtual Disk Service (VDS) Protocol Specification

2 MessagesThe following sections specify how Virtual Disk Service Remote Protocol messages are transportedand also specify VDS Remote Protocol message syntax.2.1 TransportThe Virtual Disk Service Remote Protocol uses the DCOM Remote Protocol, as specified in [MS-DCOM], as its transport. On its behalf, the DCOM Remote Protocol uses the following RPC protocolsequence: RPC over TCP, as defined in [MS-RPCE].To access an interface, the client requests a DCOM connection to its object UUID endpoint on theserver, as specified in section 1.9.The RPC version number for all interfaces is 0.0.An implementation of the Virtual Disk Service Remote Protocol MUST configure its DCOMimplementation or underlying RPC transport with the RPC_C_AUTHN_LEVEL_PKT_PRIVACY securityparameter.The Virtual Disk Service Remote Protocol interfaces make use of the underlying DCOM securityframework, as specified in [MS-DCOM], and rely on it for access control. DCOM differentiatesbetween launch and access. An implementation of the Virtual Disk Service Remote Protocol MAYdifferentiate between launch and access permission, and MAY impose different authorizationrequirements for each interface.2.2 Message SyntaxThe following sections specify Virtual Disk Service Remote Protocol message syntax. Unlessotherwise stated, all data types and messages for the Virtual Disk Service Remote Protocol MUST besupported.All enumeration structures contain a zero value defined as VDS_XXX_UNKNOWN. The zero values inthe enumerations are never valid as an input parameter. They are only used as an outputparameter.2.2.1 Common Data Types2.2.1.1 Data Types2.2.1.1.1 ULONGLONGThe ULONGLONG data type is defined in [MS-DTYP].2.2.1.1.2 DWORDThe DWORD data type is defined in [MS-DTYP].2.2.1.1.3 VDS_OBJECT_IDThe VDS_OBJECT_ID data type defines the VDS object identifier as a GUID for Virtual DiskService Remote Protocol storage objects.This type is declared as follows:[MS-VDS] — v20110610Virtual Disk Service (VDS) Protocol SpecificationCopyright © 2011 Microsoft Corporation.Release: Friday, June 10, 201126 / 360