gjdwebserver-overlay/app-mobilephone/usb-tethering/files/usb-tethering
2023-01-18 13:27:20 +01:00

84 lines
3.3 KiB
Bash

#!/bin/sh
# ConfigFS script is taken from postmarketOS
# https://postmarketos.org
# These are very important, it defines what is the device:
deviceinfo_usb_idVendor="0x1F3A"
deviceinfo_usb_idProduct="0xEFE8"
deviceinfo_manufacturer="DanctNIX"
deviceinfo_name="Arch Linux Mobile"
# We'll let them know that this device is Arch ARM.
deviceinfo_usb_serialnumber="Arch"
setup_usb_network_configfs() {
# See: https://www.kernel.org/doc/Documentation/usb/gadget_configfs.txt
CONFIGFS=/sys/kernel/config/usb_gadget/
if ! [ -e "$CONFIGFS" ]; then
echo " $CONFIGFS does not exist, skipping configfs usb gadget"
return
fi
# Default values for USB-related deviceinfo variables
usb_idVendor="${deviceinfo_usb_idVendor:-0x18D1}" # default: Google Inc.
usb_idProduct="${deviceinfo_usb_idProduct:-0xD001}" # default: Nexus 4 (fastboot)
usb_serialnumber="${deviceinfo_usb_serialnumber:-postmarketOS}"
usb_rndis_function="${deviceinfo_usb_rndis_function:-rndis.usb0}"
echo " Setting up an USB gadget through configfs"
# Create an usb gadet configuration
mkdir $CONFIGFS/g1 || echo " Couldn't create $CONFIGFS/g1"
echo "$usb_idVendor" > "$CONFIGFS/g1/idVendor"
echo "$usb_idProduct" > "$CONFIGFS/g1/idProduct"
# Create english (0x409) strings
mkdir $CONFIGFS/g1/strings/0x409 || echo " Couldn't create $CONFIGFS/g1/strings/0x409"
# shellcheck disable=SC2154
echo "$deviceinfo_manufacturer" > "$CONFIGFS/g1/strings/0x409/manufacturer"
echo "$usb_serialnumber" > "$CONFIGFS/g1/strings/0x409/serialnumber"
# shellcheck disable=SC2154
echo "$deviceinfo_name" > "$CONFIGFS/g1/strings/0x409/product"
# Create rndis function. The function can be named differently in downstream kernels.
mkdir $CONFIGFS/g1/functions/"$usb_rndis_function" \
|| echo " Couldn't create $CONFIGFS/g1/functions/$usb_rndis_function"
# https://github.com/RobertCNelson/boot-scripts/commit/714e162ba98cf3d2897e7fc95e951c6df15a7d0a
if [ -f $CONFIGFS/g1/functions/"$usb_rndis_function"/class ]; then
echo EF > $CONFIGFS/g1/functions/"$usb_rndis_function"/class
echo 04 > $CONFIGFS/g1/functions/"$usb_rndis_function"/subclass
echo 01 > $CONFIGFS/g1/functions/"$usb_rndis_function"/protocol
fi || echo "$CONFIGFS/g1/functions/$usb_rndis_function/class not found"
# Create configuration instance for the gadget
mkdir $CONFIGFS/g1/configs/c.1 \
|| echo " Couldn't create $CONFIGFS/g1/configs/c.1"
mkdir $CONFIGFS/g1/configs/c.1/strings/0x409 \
|| echo " Couldn't create $CONFIGFS/g1/configs/c.1/strings/0x409"
echo "rndis" > $CONFIGFS/g1/configs/c.1/strings/0x409/configuration \
|| echo " Couldn't write configration name"
# Link the rndis instance to the configuration
ln -s $CONFIGFS/g1/functions/"$usb_rndis_function" $CONFIGFS/g1/configs/c.1 \
|| echo " Couldn't symlink $usb_rndis_function"
# Check if there's an USB Device Controller
if [ -z "$(ls /sys/class/udc)" ]; then
echo " No USB Device Controller available"
return
fi
# Link the gadget instance to an USB Device Controller. This activates the gadget.
# See also: https://github.com/postmarketOS/pmbootstrap/issues/338
# shellcheck disable=SC2005
echo "$(ls /sys/class/udc)" > $CONFIGFS/g1/UDC || echo " Couldn't write UDC"
}
# And we go.
setup_usb_network_configfs
ip address add 10.15.19.82/24 dev usb0
ip link set usb0 up