| #!/bin/bash |
| |
| mac_config="/usr/share/mac-address/config.txt" |
| dev_mac_path="/tmp/usb0_dev" |
| host_mac_path="/tmp/usb0_host" |
| |
| check_usb_local_administered() { |
| is_enable="$(cat ${mac_config} | grep 'USBLAA')" |
| echo ${is_enable} |
| } |
| |
| # Set the locally administered bit (the second least-significant |
| # bit of the first octet) of the MAC address |
| set_local_administered_bit() { |
| mac="$(cat $1)" |
| first_byte="${mac:0:2}" |
| first_byte="$((0x$first_byte|2))" |
| first_byte="$(printf "%02x\n" "$first_byte")" |
| mac="${first_byte}${mac:2}" |
| echo $mac |
| } |
| |
| cd /sys/kernel/config/usb_gadget |
| |
| if [ ! -f "g1" ]; then |
| mkdir g1 |
| cd g1 |
| |
| echo 0x1d6b > idVendor # Linux foundation |
| echo 0x0104 > idProduct # Multifunction composite gadget |
| mkdir -p strings/0x409 |
| echo "Linux" > strings/0x409/manufacturer |
| echo "Etherned/ECM gadget" > strings/0x409/product |
| |
| mkdir -p configs/c.1 |
| echo 100 > configs/c.1/MaxPower |
| mkdir -p configs/c.1/strings/0x409 |
| echo "ECM" > configs/c.1/strings/0x409/configuration |
| |
| |
| if [[ $(check_usb_local_administered) == "USBLAA=true" ]]; then |
| dev_mac="$(set_local_administered_bit $dev_mac_path)" |
| host_mac="$(set_local_administered_bit $host_mac_path)" |
| echo $dev_mac > $dev_mac_path |
| echo $host_mac > $host_mac_path |
| fi |
| |
| mkdir -p functions/ecm.usb0 |
| cat $dev_mac_path > functions/ecm.usb0/dev_addr # write device mac address |
| cat $host_mac_path > functions/ecm.usb0/host_addr # write usb mac address |
| |
| ln -s functions/ecm.usb0 configs/c.1 |
| |
| echo "$UDC" > UDC |
| |
| rm $dev_mac_path |
| rm $host_mac_path |
| |
| fi |
| |
| exit 0 |