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The SMB2 ECHO Request packet is sent by a client to determine whether a server is processing requests. This request is composed of an SMB2 header, as specified in section 2.2.1, followed by this request structure:
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1 |
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2 |
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3 |
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StructureSize |
Reserved |
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StructureSize (2 bytes): The client MUST set this to 4, indicating the size of the request structure, not including the header.
Reserved (2 bytes): This field MUST NOT be used and MUST be reserved. The client MUST set this to 0, and the server MUST ignore it on receipt.