VIMs : RNDIS Gadget

#!/bin/sh
#
# Create Windows 10 compatible RNDIS USB Gadget
#

. /etc/fenix-release

GADGET=/sys/kernel/config/usb_gadget/g1
if [ -d $GADGET ]; then
    echo "Exiting... RNDIS Gadget exists"
    exit 0
fi

F_RNDIS=$GADGET/functions/rndis.0
SERIAL="$(grep Serial /proc/cpuinfo | grep -o -P '.{0,12}$')"
MAC="$(echo ${SERIAL} | sed 's/\(\w\w\)/:\1/g' | cut -b 2-)"
MAC_HOST="12$(echo ${MAC} | cut -b 3-)"
MAC_DEV="02$(echo ${MAC} | cut -b 3-)"
UDC="$(ls /sys/class/udc/| awk '{print $1}')"

mkdir $GADGET

echo "0x1d6b" > $GADGET/idVendor  # Linux Foundation
echo "0x0104" > $GADGET/idProduct
echo "0x0100" > $GADGET/bcdDevice
echo "0x0200" > $GADGET/bcdUSB

echo "0xEF" > $GADGET/bDeviceClass
echo "0x04" > $GADGET/bDeviceSubClass
echo "0x01" > $GADGET/bDeviceProtocol

# Set Strings
mkdir $GADGET/strings/0x409
echo $SERIAL  > $GADGET/strings/0x409/serialnumber
echo "Khadas" > $GADGET/strings/0x409/manufacturer
echo $BOARD   > $GADGET/strings/0x409/product

# Create Config
mkdir $GADGET/configs/c.1
mkdir $GADGET/configs/c.1/strings/0x409
echo "RNDIS Gadget" > $GADGET/configs/c.1/strings/0x409/configuration
echo "500" > $GADGET/configs/c.1/MaxPower
echo "0x80" > $GADGET/configs/c.1/bmAttributes #  USB_OTG_SRP | USB_OTG_HNP

# Create RNDIS function
mkdir $F_RNDIS
echo $MAC_HOST > $F_RNDIS/host_addr
echo $MAC_DEV > $F_RNDIS/dev_addr

# OS Descriptors
echo "1" > $GADGET/os_desc/use
echo "0xbc" > $GADGET/os_desc/b_vendor_code
echo "MSFT100" > $GADGET/os_desc/qw_sign
mkdir -p $F_RNDIS/os_desc/interface.rndis
echo "RNDIS" > $F_RNDIS/os_desc/interface.rndis/compatible_id
echo "5162001" > $F_RNDIS/os_desc/interface.rndis/sub_compatible_id

# Bind function to configuration
ln -s $F_RNDIS $GADGET/configs/c.1/
ln -s $GADGET/configs/c.1/ $GADGET/os_desc

# Enable the Gadget
echo $UDC > $GADGET/UDC

echo "Done creating RNDIS USB Gadget...$(cat $F_RNDIS/ifname)"
exit 0