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Protocol independent way to selectively restrict write-access for redirected USB mass storage devices

  • US 10,021,217 B2
  • Filed: 08/24/2015
  • Issued: 07/10/2018
  • Est. Priority Date: 08/24/2015
  • Status: Active Grant
First Claim
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1. A method comprising:

  • snooping and trapping a small computer system interface (SCSI) Mode Sense response from a first redirected universal serial bus (USB) mass storage device of a first client, wherein the SCSI Mode Sense response comprises one or more device-specific parameter field values;

    determining if device protection is enabled for the first (USB) mass storage device;

    determining if the response includes a USB request block (URB) bulk transfer;

    determining if the response includes SCSI Mode Sense data;

    setting a write-protect bit of a header of the response; and

    sending the response to one or more upper layers of a driver stack.

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