139 lines
4.1 KiB
Bash
Executable File
139 lines
4.1 KiB
Bash
Executable File
## SPDX-License-Identifier: GPL-2.0-only
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## Init functions for JumpDrive
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## Copyright (C) 2020 - postmarketOS
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## Copyright (C) 2020 - Danctl12 <danct12@disroot.org>
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setup_usb_configfs() {
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# See: https://www.kernel.org/doc/Documentation/usb/gadget_configfs.txt
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CONFIGFS=/config/usb_gadget
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if ! [ -e "$CONFIGFS" ]; then
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echo "$CONFIGFS does not exist, this is not good."
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crash_kernel
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fi
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# Default values for USB-related deviceinfo variables
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usb_idVendor="0x1209" # Generic
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usb_idProduct="0x4201" # Random ID
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usb_serialnumber="Jumpdrive"
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usb_rndis_function="rndis.usb0"
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usb_mass_storage_function="mass_storage.0"
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echo "Setting up an USB gadget through configfs..."
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# Create an usb gadet configuration
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mkdir $CONFIGFS/g1 || ( echo "Couldn't create $CONFIGFS/g1" ; crash_kernel )
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echo "$usb_idVendor" > "$CONFIGFS/g1/idVendor"
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echo "$usb_idProduct" > "$CONFIGFS/g1/idProduct"
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# Create english (0x409) strings
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mkdir $CONFIGFS/g1/strings/0x409 || echo " Couldn't create $CONFIGFS/g1/strings/0x409"
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# shellcheck disable=SC2154
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echo "Pine64" > "$CONFIGFS/g1/strings/0x409/manufacturer"
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echo "$usb_serialnumber" > "$CONFIGFS/g1/strings/0x409/serialnumber"
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# shellcheck disable=SC2154
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echo "PinePhone" > "$CONFIGFS/g1/strings/0x409/product"
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# Create rndis/mass_storage function
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mkdir $CONFIGFS/g1/functions/"$usb_rndis_function" \
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|| echo " Couldn't create $CONFIGFS/g1/functions/$usb_rndis_function"
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mkdir $CONFIGFS/g1/functions/"$usb_mass_storage_function" \
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|| echo " Couldn't create $CONFIGFS/g1/functions/$usb_mass_storage_function"
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# Create configuration instance for the gadget
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mkdir $CONFIGFS/g1/configs/c.1 \
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|| echo " Couldn't create $CONFIGFS/g1/configs/c.1"
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mkdir $CONFIGFS/g1/configs/c.1/strings/0x409 \
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|| echo " Couldn't create $CONFIGFS/g1/configs/c.1/strings/0x409"
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echo "rndis" > $CONFIGFS/g1/configs/c.1/strings/0x409/configuration \
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|| echo " Couldn't write configration name"
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# Make sure there is a mmcblk2 (eMMC)...
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if [ -z "$(ls /dev/mmcblk2)" ]; then
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echo "/dev/mmcblk2 could not be opened, possible eMMC defect"
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crash_kernel
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fi
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# Set up mass storage to internal EMMC
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echo /dev/mmcblk2 > $CONFIGFS/g1/functions/"$usb_mass_storage_function"/lun.0/file
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# Link the rndis/mass_storage instance to the configuration
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ln -s $CONFIGFS/g1/functions/"$usb_rndis_function" $CONFIGFS/g1/configs/c.1 \
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|| echo " Couldn't symlink $usb_rndis_function"
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ln -s $CONFIGFS/g1/functions/"$usb_mass_storage_function" $CONFIGFS/g1/configs/c.1 \
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|| echo " Couldn't symlink $usb_mass_storage_function"
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# Check if there's an USB Device Controller
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if [ -z "$(ls /sys/class/udc)" ]; then
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echo "No USB Device Controller available"
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crash_kernel
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fi
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# shellcheck disable=SC2005
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echo "$(ls /sys/class/udc)" > $CONFIGFS/g1/UDC || ( echo "Couldn't write UDC." ; crash_kernel )
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}
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setup_telnetd() {
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echo "Starting telnet daemon..."
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{
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echo "#!/bin/sh"
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echo "echo \"Welcome to Rescue SD Shell!\""
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echo "sh"
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} >/telnet_connect.sh
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chmod +x /telnet_connect.sh
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telnetd -b "${IP}:23" -l /telnet_connect.sh
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}
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start_udhcpd() {
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# Only run once
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[ -e /etc/udhcpd.conf ] && return
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# Get usb interface
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INTERFACE=""
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ifconfig rndis0 "$IP" 2>/dev/null && INTERFACE=rndis0
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if [ -z $INTERFACE ]; then
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ifconfig usb0 "$IP" 2>/dev/null && INTERFACE=usb0
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fi
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if [ -z $INTERFACE ]; then
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ifconfig eth0 "$IP" 2>/dev/null && INTERFACE=eth0
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fi
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if [ -z $INTERFACE ]; then
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echo "Could not find an interface to run a DHCP server on, this is not good."
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echo "Interfaces:"
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ip link
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return
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fi
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echo "Network interface $INTERFACE is used"
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# Create /etc/udhcpd.conf
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{
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echo "start 172.16.42.2"
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echo "end 172.16.42.2"
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echo "auto_time 0"
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echo "decline_time 0"
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echo "conflict_time 0"
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echo "lease_file /var/udhcpd.leases"
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echo "interface $INTERFACE"
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echo "option subnet 255.255.255.0"
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} >/etc/udhcpd.conf
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echo "Started udhcpd daemon for rescue purposes"
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udhcpd
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}
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crash_kernel() {
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echo "panic: We're hanging here..."
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# shellcheck disable=SC1001
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echo panic > /sys/class/leds/pinephone\:red\:user/trigger
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echo c > /proc/sysrq-trigger
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}
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loop_forever() {
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while true; do
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sleep 1
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done
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}
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