UPL(4) BSD Kernel Interfaces Manual UPL(4)
upl -- Prolific based host-to-host adapters
upl* at uhub?
The upl driver provides support for Prolific PL2301/PL2302 based host-to-
host USB connectors.
The upl driver appears as a point-to-point network interface and should
be configured with ifconfig(8) in the same way as other point-to-point
interfaces. The upl device supports IPv4 only.
The upl driver supports the following adapters from the following ven-
Belkin, Entrega, and Xircom do NOT use this chip and are not supported by
netintro(4), uhub(4), usb(4), ifconfig(8)
The upl driver appeared in NetBSD 1.5. OpenBSD support was added in
BSD April 29, 2017 BSD