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