On Fri, 2023-03-10 at 10:55 +0100, gregkh@xxxxxxxxxxxxxxxxxxx wrote:
> On Fri, Mar 10, 2023 at 09:44:26AM +0000, Joakim Tjernlund wrote:
> > The old RNDIS/NCM configs does not work against modern Windows. I wonder if there
> > should/could be updated to working state ?
>
> Please never use RNDIS on modern systems unless you fully trust the
> "other side" of the connection as it is not a secure protocol by any
> means.
Yes, we will move to NCM (new in >= Windows 10)
>
> NCM should "just work" instead. What exactly is failing, and what
> specifically do you mean by "modern Windows"?
NCM does not just work on Windows >= 10 it needs configfs settings:
NCM snipped:
echo 1 > os_desc/use
echo 0xbc > os_desc/b_vendor_code
echo MSFT100 > os_desc/qw_sign
mkdir functions/ncm.usb0
mkdir -p functions/ncm.usb0/os_desc/interface.ncm
#Set compatible id so that Windows 10 can match this function to
# NCM driver more easily.
echo WINNCM > functions/ncm.usb0/os_desc/interface.ncm/compatible_id
mkdir -p configs/c.1
mkdir -p configs/c.1/strings/0x409
echo "conf1" > configs/c.1/strings/0x409/configuration
ln -s functions/ncm.usb0 configs/c.1
if [ ! -L os_desc/c.1 ]
then
ln -s configs/c.1 os_desc
fi
New RNDIS in Windows >= 10
echo 1 > os_desc/use
echo 0xbc > os_desc/b_vendor_code
echo MSFT100 > os_desc/qw_sign
mkdir functions/rndis.usb0
mkdir -p functions/rndis.usb0/os_desc/interface.rndis
#Set compatible / sub-compatible id's so that Windows can match this
# function to RNDIS6 driver more easily.
echo RNDIS > functions/rndis.usb0/os_desc/interface.rndis/compatible_id
echo 5162001 > functions/rndis.usb0/os_desc/interface.rndis/sub_compatible_id
mkdir -p configs/c.1
mkdir -p configs/c.1/strings/0x409
echo "conf1" > configs/c.1/strings/0x409/configuration
ln -s functions/rndis.usb0 configs/c.1
if [ ! -L os_desc/c.1 ]
then
ln -s configs/c.1 os_desc
