Universal serial bus (USB) redirection for USB human interface device (HID) class devices

A non-transitory computer readable storage medium having stored thereon program code executable by a server system, the program code embodying a method for redirecting a Universal Serial Bus (USB) human interface device (HID) class device from a client system to a virtual desktop running on the server system, the method comprising:

• generating, by a guest USB device driver within the virtual desktop, a poll message directed to an HID interface of the USB HID class device;
• determining whether the generated poll message is a first poll message for the HID interface;
• upon determining that the generated poll message is the first poll message, sending the generated poll message to the client system;
• and
• upon determining that the generated poll message is not the first poll message:
• removing, from a server-side queue, a poll reply received from the client system in response to a previously sent poll message;
• and
• providing the poll reply to the guest USB device driver.

A server system comprising:

• a virtual desktop comprising a guest Universal Serial Bus (USB) driver;
• and
• a non-transitory computer readable medium having stored thereon program code for redirecting a USB human interface device (HID) class device from a client system to the virtual desktop, the program code causing the server system to:
• generate, via the guest USB device driver, a poll message directed to an HID interface of the USB HID class device;
• determine whether the generated poll message is a first poll message for the HID interface;
• upon determining that the generated poll message is the first poll message, send the generated poll message to the client system;
• and
• upon determining that the generated poll message is not the first poll message:
• remove, from a server-side queue, a poll reply received from the client system in response to a previously sent poll message;
• and
• provide the poll reply to the guest USB device driver.