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Default USB redirection policies

Solution

TMS 8.2.0 and later allows you to specify per-USB-device overrides for the default USB redirection policy (for modes that support USB redirection), but doesn't tell you what those policies actually are.

Default policies are as follows (Yes = redirect, No = do not redirect, - no policy (fall through to default), * = cannot be overridden, ** = except for the Raspberry Pi's onboard Class 0 Ethernet)

USB Device ClassHDXHorizonRDPSPICE
Audio (01) No No (optionally Yes on RPi) - -
Keyboards and Mice (03-01, 03-02) No* No* No* No*
Printer (07) Yes - - Yes
Storage (08) - - - Yes
Hub (09) No* No* No* No*
Ethernet/serial (a.k.a. CDC-Data, 0a) No - - -
Smartcard (0b) No No - -
Video (0e) - No (Yes on RPi) - Yes
Wireless (e0) No - - -
Anything else Yes** Yes No No

The default SPICE USB redirection policy is an arbitrary TLXOS invention imposed by the /usr/local/bin/spice script.  Unfortunately FreeRDP does not allow definition of a default policy in this manner, so it redirects nothing by default (but will never allow redirection of mice/keyboards and hubs).

Because the ARM port of Horizon Client lacks any alternative for high-level audio redirection, TMS/Tlxconfig will optionally allow you to use the "Auto with audio redir (risky)" stance instead of "Auto" in this case.  The difference is that Class 01 (audio) devices will be permitted by default, which may or may not work depending on the hardware involved.

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Article details
Article ID: 50
Category: General Information
Date added: 2020-07-19 06:42:08
Views: 206

 
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