#!/bin/bash
#
# .---.                  .              .
# |                      |              |
# |--- .--. .-.  .-.  .-.|  .-. .--.--. |.-.  .-. .--.  .-.
# |    |   (.-' (.-' (   | (   )|  |  | |   )(   )|  | (.-'
# '    '     --'  --'  -' -  -' '  '   -' -'   -' '   -  --'
#
#                    Freedom in the Cloud
#
# Based on bin/freedombox-customize from freedom-maker
#
# License
# =======
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

set -e
set -x

PROJECT_NAME='freedombone'
INSTALL_DIR=/root/build
COMPLETION_FILE=$HOME/${PROJECT_NAME}-completed.txt

PROJECT_REPO="https://github.com/bashrc/${PROJECT_NAME}"

# username created by default within a debian image
GENERIC_IMAGE_USERNAME='fbone'

export TEXTDOMAIN=${PROJECT_NAME}-image-customise
export TEXTDOMAINDIR="/usr/share/locale"

# Whether to minimise the number of decisions during interactive install
MINIMAL_INSTALL="yes"

MY_USERNAME='debian'
MY_PASSWORD="${PROJECT_NAME}"

# IP address of the router (gateway)
ROUTER_IP_ADDRESS="192.168.1.254"

# The fixed IP address of the Beaglebone Black on your local network
BOX_IP_ADDRESS="192.168.1.55"

# DNS
NAMESERVER1='213.73.91.35'
NAMESERVER2='85.214.20.141'

# optional configuration file containing freedombone settings
CONFIG_FILENAME=

# Optional ssh public key to allow
SSH_PUBKEY="no"

# Whether this is a generic image for mass redistribution on the interwebs
GENERIC_IMAGE="no"

# default SSH port
SSH_PORT=2222

# for mesh installs
TRACKER_PORT=6969

# Whether sites are accessible only within a Tor browser
ONION_ONLY="no"

WIFI_INTERFACE='wlan0'

enable_eatmydata_override() {
    chroot $rootdir apt-get install --no-install-recommends -y eatmydata
    if [ -x $rootdir/usr/bin/eatmydata ] && \
        [ ! -f $rootdir/etc/apt/apt.conf.d/95debian-edu-install-dpkg-eatmydata ]; then
        echo $"info: Adding apt config to call dpkg via eatmydata"
        printf "#!/bin/sh\nexec eatmydata dpkg \"\$@\"\n" \
            > $rootdir/var/tmp/dpkg-eatmydata
        chmod 755 $rootdir/var/tmp/dpkg-eatmydata
        cat > $rootdir/etc/apt/apt.conf.d/95debian-edu-install-dpkg-eatmydata <<EOF
Dir::Bin::dpkg "/var/tmp/dpkg-eatmydata";
EOF
    else
        echo $"error: unable to find /usr/bin/eatmydata after installing the eatmydata package"
    fi
}

disable_eatmydata_override() {
    for override in \
        /etc/apt/apt.conf.d/95debian-edu-install-dpkg-eatmydata \
        /var/tmp/dpkg-eatmydata ; do
        echo $"info: Removing apt config to call dpkg via eatmydata"
        if [ -f $rootdir$override ] ; then
            rm -f $rootdir$override
        else
            echo $"warning: missing $rootdir$override"
        fi
    done
    sync # Flush file buffers before continuing
}

set_apt_sources() {
    NEW_MIRROR="$1"
    COMPONENTS="main"

    cat <<EOF > etc/apt/sources.list
deb $NEW_MIRROR $SUITE $COMPONENTS
deb-src $NEW_MIRROR $SUITE $COMPONENTS

#deb http://security.debian.org/ $SUITE/updates main
#deb-src http://security.debian.org/ $SUITE/updates main
EOF
}

configure_networking() {
    if [[ $GENERIC_IMAGE == "no" ]]; then
        echo "# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).

# The loopback network interface
auto lo
iface lo inet loopback

# The primary network interface
auto eth0
iface eth0 inet static
    address $BOX_IP_ADDRESS
    netmask 255.255.255.0
    gateway $ROUTER_IP_ADDRESS
    dns-nameservers $NAMESERVER1 $NAMESERVER2
# Example to keep MAC address between reboots
#hwaddress ether B5:A2:BE:3F:1A:FE

# The secondary network interface
#auto eth1
#iface eth1 inet dhcp

# WiFi Example
#auto wlan0
#iface wlan0 inet dhcp
#    wpa-ssid \"essid\"
#    wpa-psk  \"password\"

# Ethernet/RNDIS gadget (g_ether)
# ... or on host side, usbnet and random hwaddr
# Note on some boards, usb0 is automaticly setup with an init script
#iface usb0 inet static
#    address 192.168.7.2
#    netmask 255.255.255.0
#    network 192.168.7.0
#    gateway 192.168.7.1" > $rootdir/etc/network/interfaces

        hexarray=( 1 2 3 4 5 6 7 8 9 0 a b c d e f )
        a=${hexarray[$RANDOM%16]}${hexarray[$RANDOM%16]}
        b=${hexarray[$RANDOM%16]}${hexarray[$RANDOM%16]}
        c=${hexarray[$RANDOM%16]}${hexarray[$RANDOM%16]}
        d=${hexarray[$RANDOM%16]}${hexarray[$RANDOM%16]}
        e=${hexarray[$RANDOM%16]}${hexarray[$RANDOM%16]}
        sed -i "s|#hwaddress ether.*|hwaddress ether de:$a:$b:$c:$d:$e|g" \
            $rootdir/etc/network/interfaces
    fi

    sed -i "s/nameserver.*/nameserver $NAMESERVER1/g" $rootdir/etc/resolv.conf
    sed -i "/nameserver $NAMESERVER1/a\nameserver $NAMESERVER2" $rootdir/etc/resolv.conf

    # change the motd to show further install instructions
    echo $"
 .---.                  .              .
 |                      |              |
 |--- .--. .-.  .-.  .-.|  .-. .--.--. |.-.  .-. .--.  .-.
 |    |   (.-' (.-' (   | (   )|  |  | |   )(   )|  | (.-'
 '    '     --'  --'  -' -  -' '  '   -' -'   -' '   -  --'

                    Initial base install

Your system is not yet installed. To complete the process run the
following commands, then enter your details.

    sudo su
    ${PROJECT_NAME} menuconfig

" > $rootdir/etc/motd
}

configure_ssh() {
    sed -i "s/Port .*/Port ${SSH_PORT}/g" $rootdir/etc/ssh/sshd_config

    if [[ "$SSH_PUBKEY" != "no" ]]; then
        if [ ! -d $rootdir/home/$MY_USERNAME/.ssh ]; then
            mkdir $rootdir/home/$MY_USERNAME/.ssh
        fi
        echo "$SSH_PUBKEY" > $rootdir/home/$MY_USERNAME/.ssh/authorized_keys
        chroot $rootdir chown -R $MY_USERNAME:$MY_USERNAME /home/$MY_USERNAME/.ssh
        sed -i 's|PasswordAuthentication.*|PasswordAuthentication no|g' $rootdir/etc/ssh/sshd_config
        echo $"Using ssh public key:"
        echo $SSH_PUBKEY
        echo $'Password ssh authentication turned off'
    fi
}

admin_user_sudo() {
    echo "$MY_USERNAME  ALL=(ALL) ALL" >> $rootdir/etc/sudoers
}

create_generic_image() {
    if [[ $GENERIC_IMAGE == "no" ]]; then
        return
    fi
    VARIANT="full"
    if [ $CONFIG_FILENAME ]; then
        if [[ "$CONFIG_FILENAME" == *"mesh.cfg"* ]]; then
            VARIANT="mesh"
        fi
    fi

    # Don't install any configuration. This will be a base system
    if [[ $VARIANT != "mesh" ]]; then
        CONFIG_FILENAME=
    else
        touch $rootdir/root/.initial_mesh_setup
    fi

    # The presence of this file indicates that the initial
    # setup has not yet been completed
    touch $rootdir/home/$MY_USERNAME/.initial_setup
    chroot $rootdir chown $MY_USERNAME:$MY_USERNAME /home/$MY_USERNAME/.initial_setup
    touch $rootdir/root/.initial_setup

    cat >> $rootdir/home/$MY_USERNAME/.bashrc <<EOF
# initial setup of the system
if [ -f ~/.initial_setup ]; then
    clear
    echo "
 .---.                  .              .
 |                      |              |
 |--- .--. .-.  .-.  .-.|  .-. .--.--. |.-.  .-. .--.  .-.
 |    |   (.-' (.-' (   | (   )|  |  | |   )(   )|  | (.-'
 '    '     --'  --'  -' -  -' '  '   -' -'   -' '   -  --'

                   Initial setup process

          Please enter your password a second time.
"
    sudo su
fi
EOF

    echo '# initial setup of the system' >> $rootdir/root/.bashrc
    echo 'if [ -f ~/.initial_setup ]; then' >> $rootdir/root/.bashrc
    echo '    if [ -f ~/login.txt ]; then' >> $rootdir/root/.bashrc
    echo '        NEW_USER_PASSWORD=$(printf `cat ~/login.txt`)' >> $rootdir/root/.bashrc
    echo '    else' >> $rootdir/root/.bashrc
    echo '        ENTROPY=$(cat /proc/sys/kernel/random/entropy_avail)' >> $rootdir/root/.bashrc
    echo '        if [ $ENTROPY -lt 500 ]; then' >> $rootdir/root/.bashrc
    echo '            dialog --backtitle "Initial setup process" --title "Password Generation" --msgbox "WARNING: The entropy available on this system is too low to generate a password.\n\nThe installation process cannot continue." 8 50' >> $rootdir/root/.bashrc
    echo '            exit' >> $rootdir/root/.bashrc
    echo '        fi' >> $rootdir/root/.bashrc
    echo '        NEW_USER_PASSWORD="$(openssl rand -base64 12 | cut -c1-10)"' >> $rootdir/root/.bashrc
    echo '    fi' >> $rootdir/root/.bashrc
    echo '    echo "${NEW_USER_PASSWORD}" > ~/login.txt' >> $rootdir/root/.bashrc

    echo '    clear' >> $rootdir/root/.bashrc
    echo '    echo ""' >> $rootdir/root/.bashrc
    echo '    echo "Your new login password is:"' >> $rootdir/root/.bashrc
    echo '    echo ""' >> $rootdir/root/.bashrc
    echo '    toilet "${NEW_USER_PASSWORD}"' >> $rootdir/root/.bashrc
    echo '    echo ""' >> $rootdir/root/.bashrc
    echo '    echo "                          ${NEW_USER_PASSWORD}"' >> $rootdir/root/.bashrc
    echo '    echo ""' >> $rootdir/root/.bashrc
    echo '    echo "Use it whenever you wish to ssh into this system."' >> $rootdir/root/.bashrc
    echo '    echo ""' >> $rootdir/root/.bashrc
    echo '    echo "IMPORTANT: Please take a moment to enter the above password into a"' >> $rootdir/root/.bashrc
    echo '    echo "password manager or write it down somewhere."' >> $rootdir/root/.bashrc
    echo '    echo ""' >> $rootdir/root/.bashrc
    echo '    read -n1 -r -p "Press any key to continue..." key' >> $rootdir/root/.bashrc

    # change the password for the admin user
    echo -n "    echo \"${MY_USERNAME}:" >> $rootdir/root/.bashrc
    echo '$(printf `cat ~/login.txt`)"|chpasswd' >> $rootdir/root/.bashrc

    # update before continuing
    echo "    cd /root/${PROJECT_NAME}" >> $rootdir/root/.bashrc
    echo "    git stash" >> $rootdir/root/.bashrc
    echo "    git pull" >> $rootdir/root/.bashrc
    echo "    make install" >> $rootdir/root/.bashrc

    if [[ $VARIANT != "mesh" ]]; then
        if [[ $ONION_ONLY == "no" ]]; then
            if [[ $MINIMAL_INSTALL == "no" ]]; then
                echo "    ${PROJECT_NAME} menuconfig-full" >> $rootdir/root/.bashrc
            else
                echo "    ${PROJECT_NAME} menuconfig" >> $rootdir/root/.bashrc
            fi
        else
            echo "    ${PROJECT_NAME} menuconfig-onion" >> $rootdir/root/.bashrc
        fi
    else
        echo "    echo ''" >> $rootdir/root/.bashrc
    fi
    echo '    if [ "$?" = "0" ]; then' >> $rootdir/root/.bashrc
    echo "        if [ -f ~/${PROJECT_NAME}-completed.txt ]; then" >> $rootdir/root/.bashrc
    # Remove the initial setup files
    echo '            rm /root/.initial_setup' >> $rootdir/root/.bashrc
    echo "            rm /home/${MY_USERNAME}/.initial_setup" >> $rootdir/root/.bashrc
    echo "            touch /root/.remove_${GENERIC_IMAGE_USERNAME}" >> $rootdir/root/.bashrc
    echo '            shred -zu ~/login.txt' >> $rootdir/root/.bashrc
    END_MESSAGE1=$'Congratulations!'
    if [[ $VARIANT != "mesh" ]]; then
        END_MESSAGE2=$'\nYour system has now installed\n\nThe onion ssh service is at $SSH_ONION_HOSTNAME\n\nPress any key to reboot and begin using it'
        echo '            SSH_ONION_HOSTNAME=$(cat /var/lib/tor/hidden_service_ssh/hostname)' >> $rootdir/root/.bashrc
    else
        END_MESSAGE2=$'\nYour system has now installed\n\nPress any key to reboot and begin using it'
    fi
    echo "            dialog --title '$END_MESSAGE1' --msgbox \"$END_MESSAGE2\" 9 50" >> $rootdir/root/.bashrc
    echo '            reboot' >> $rootdir/root/.bashrc
    echo '        fi' >> $rootdir/root/.bashrc
    echo '    else' >> $rootdir/root/.bashrc
    echo '        key=' >> $rootdir/root/.bashrc
    echo '        while [[ $key != "x" ]]; do' >> $rootdir/root/.bashrc
    echo '            read -n1 -r -p "Press x to continue..." key' >> $rootdir/root/.bashrc
    echo '        done' >> $rootdir/root/.bashrc
    echo '    fi' >> $rootdir/root/.bashrc
    echo '    exit' >> $rootdir/root/.bashrc
    echo 'else' >> $rootdir/root/.bashrc
    echo '    # Remove default account after install' >> $rootdir/root/.bashrc
    echo "    if [ -f /root/.remove_${GENERIC_IMAGE_USERNAME} ]; then" >> $rootdir/root/.bashrc
    echo "        if [ -d /home/${GENERIC_IMAGE_USERNAME} ]; then" >> $rootdir/root/.bashrc
    echo "           userdel -r ${GENERIC_IMAGE_USERNAME}" >> $rootdir/root/.bashrc
    echo "           if [ -d /home/${GENERIC_IMAGE_USERNAME} ]; then" >> $rootdir/root/.bashrc
    echo "               rm -rf /home/${GENERIC_IMAGE_USERNAME}" >> $rootdir/root/.bashrc
    echo "               rm /root/.remove_${GENERIC_IMAGE_USERNAME}" >> $rootdir/root/.bashrc
    echo '           fi' >> $rootdir/root/.bashrc
    echo '        fi' >> $rootdir/root/.bashrc
    echo '    fi' >> $rootdir/root/.bashrc
    echo 'fi' >> $rootdir/root/.bashrc
}

continue_installation() {
    # If a configuration file exists then run with it
    # otherwise the interactive installer can be used
    # This is equivalent to installing freedombox-setup on freedombox
    if [ $CONFIG_FILENAME ]; then
        if [ ${#CONFIG_FILENAME} -gt 2 ]; then
            cp $CONFIG_FILENAME $rootdir/root/$PROJECT_NAME.cfg
            cat $rootdir/root/$PROJECT_NAME.cfg
            chroot "$rootdir" su -c "$PROJECT_NAME -c /root/$PROJECT_NAME.cfg" - root
        fi
    fi
}

atheros_wifi() {
    firmware_filename="open-ath9k-htc-firmware_1.3-1_all.deb"
    firmware_hash='5fea58ffefdf0ef15b504db7fbe3bc078c03e0d927bba64085e4b6f2546102f5'

    firmware_url="http://us.archive.trisquel.info/trisquel/pool/main/o/open-ath9k-htc-firmware/$firmware_filename"
    firmware_tempfile="/tmp/$firmware_filename"
    wget "$firmware_url" -O "$rootdir$firmware_tempfile"
    downloaded_firmware_hash=$(sha256sum "$rootdir$firmware_tempfile" | awk -F ' ' '{print $1}')
    if [[ "$downloaded_firmware_hash" == "$firmware_hash" ]]; then
        chroot "$rootdir" dpkg -i "$firmware_tempfile"
    else
        echo 'WARNING: Atheros Wifi firmware hash does not match. The driver has not been installed.'
    fi
}

mesh_avahi() {
    chroot "$rootdir" apt-get -y install avahi-utils avahi-autoipd avahi-dnsconfd

    decarray=( 1 2 3 4 5 6 7 8 9 0 )
    PEER_ID=${decarray[$RANDOM%10]}${decarray[$RANDOM%10]}${decarray[$RANDOM%10]}${decarray[$RANDOM%10]}${decarray[$RANDOM%10]}${decarray[$RANDOM%10]}${decarray[$RANDOM%10]}${decarray[$RANDOM%10]}
    sed -i "s|#host-name=.*|host-name=P$PEER_ID|g" $rootdir/etc/avahi/avahi-daemon.conf

    if [ ! -d $rootdir/etc/avahi/services ]; then
        mkdir -p $rootdir/etc/avahi/services
    fi

    # remove an avahi service which isn't used
    if [ -f $rootdir/etc/avahi/services/udisks.service ]; then
        rm $rootdir/etc/avahi/services/udisks.service
    fi

    # Add an ssh service
    echo '<?xml version="1.0" standalone="no"?><!--*-nxml-*-->' > $rootdir/etc/avahi/services/ssh.service
    echo '<!DOCTYPE service-group SYSTEM "avahi-service.dtd">' >> $rootdir/etc/avahi/services/ssh.service
    echo '<service-group>' >> $rootdir/etc/avahi/services/ssh.service
    echo '  <name replace-wildcards="yes">%h SSH</name>' >> $rootdir/etc/avahi/services/ssh.service
    echo '  <service>' >> $rootdir/etc/avahi/services/ssh.service
    echo '    <type>_ssh._tcp</type>' >> $rootdir/etc/avahi/services/ssh.service
    echo "    <port>$SSH_PORT</port>" >> $rootdir/etc/avahi/services/ssh.service
    echo '  </service>' >> $rootdir/etc/avahi/services/ssh.service
    echo '</service-group>' >> $rootdir/etc/avahi/services/ssh.service

    # keep the daemon running
    WATCHDOG_SCRIPT_NAME="keepon"
    echo '' >> $rootdir/usr/bin/$WATCHDOG_SCRIPT_NAME
    echo '# keep avahi daemon running' >> $rootdir/usr/bin/$WATCHDOG_SCRIPT_NAME
    echo 'AVAHI_RUNNING=$(pgrep avahi-daemon > /dev/null && echo Running)' >> $rootdir/usr/bin/$WATCHDOG_SCRIPT_NAME
    echo 'if [ ! $AVAHI_RUNNING ]; then' >> $rootdir/usr/bin/$WATCHDOG_SCRIPT_NAME
    echo '  systemctl start avahi-daemon' >> $rootdir/usr/bin/$WATCHDOG_SCRIPT_NAME
    echo '  echo -n $CURRENT_DATE >> $LOGFILE' >> $rootdir/usr/bin/$WATCHDOG_SCRIPT_NAME
    echo '  echo " Avahi daemon restarted" >> $LOGFILE' >> $rootdir/usr/bin/$WATCHDOG_SCRIPT_NAME
    echo 'fi' >> $rootdir/usr/bin/$WATCHDOG_SCRIPT_NAME
    chmod +x $rootdir/usr/bin/$WATCHDOG_SCRIPT_NAME
}

mesh_batman() {
    chroot "$rootdir" apt-get -y install iproute bridge-utils libnetfilter-conntrack3 batctl
    chroot "$rootdir" apt-get -y install python-dev libevent-dev ebtables python-pip git
    chroot "$rootdir" apt-get -y install wireless-tools rfkill

    if ! grep -q "batman_adv" $rootdir/etc/modules; then
        echo 'batman_adv' >> $rootdir/etc/modules
    fi

    if [ -f /usr/local/bin/${PROJECT_NAME}-mesh-batman ]; then
        cp /usr/local/bin/${PROJECT_NAME}-mesh-batman $rootdir/var/lib/batman
    else
        cp /usr/bin/${PROJECT_NAME}-mesh-batman $rootdir/var/lib/batman
    fi

    echo '[Unit]' > $rootdir/etc/systemd/system/batman.service
    echo 'Description=B.A.T.M.A.N. Advanced' >> $rootdir/etc/systemd/system/batman.service
    echo '' >> $rootdir/etc/systemd/system/batman.service
    echo '[Service]' >> $rootdir/etc/systemd/system/batman.service
    echo 'Type=oneshot' >> $rootdir/etc/systemd/system/batman.service
    echo "ExecStart=/var/lib/batman start" >> $rootdir/etc/systemd/system/batman.service
    echo "ExecStop=/var/lib/batman stop" >> $rootdir/etc/systemd/system/batman.service
    echo 'RemainAfterExit=yes' >> $rootdir/etc/systemd/system/batman.service
    echo '' >> $rootdir/etc/systemd/system/batman.service
    echo '# Allow time for the server to start/stop' >> $rootdir/etc/systemd/system/batman.service
    echo 'TimeoutSec=300' >> $rootdir/etc/systemd/system/batman.service
    echo '' >> $rootdir/etc/systemd/system/batman.service
    echo '[Install]' >> $rootdir/etc/systemd/system/batman.service
    echo 'WantedBy=multi-user.target' >> $rootdir/etc/systemd/system/batman.service
    chroot "$rootdir" systemctl enable batman
}

mesh_firewall() {
    TOX_PORT=33445
    ZERONET_PORT=15441
    FIREWALL_FILENAME=$rootdir/etc/systemd/system/meshfirewall.service
    MESH_FIREWALL_SCRIPT=/usr/bin/mesh-firewall

    echo '#!/bin/bash' > $rootdir/$MESH_FIREWALL_SCRIPT
    echo 'iptables -P INPUT ACCEPT' >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo 'ip6tables -P INPUT ACCEPT' >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo 'iptables -F' >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo 'ip6tables -F' >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo 'iptables -t nat -F' >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo 'ip6tables -t nat -F' >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo 'iptables -X' >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo 'ip6tables -X' >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo 'iptables -P INPUT DROP' >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo 'ip6tables -P INPUT DROP' >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo 'iptables -A INPUT -i lo -j ACCEPT' >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo 'iptables -A INPUT -m conntrack --ctstate ESTABLISHED,RELATED -j ACCEPT' >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo '' >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo '# Make sure incoming tcp connections are SYN packets' >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo 'iptables -A INPUT -p tcp ! --syn -m state --state NEW -j DROP' >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo '' >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo '# Drop packets with incoming fragments' >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo 'iptables -A INPUT -f -j DROP' >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo '' >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo '# Drop bogons' >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo 'iptables -A INPUT -p tcp --tcp-flags ALL ALL -j DROP' >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo 'iptables -A INPUT -p tcp --tcp-flags ALL FIN,PSH,URG -j DROP' >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo 'iptables -A INPUT -p tcp --tcp-flags ALL SYN,RST,ACK,FIN,URG -j DROP' >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo '' >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo '# Incoming malformed NULL packets:' >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo 'iptables -A INPUT -p tcp --tcp-flags ALL NONE -j DROP' >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo '' >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo "iptables -A INPUT -p tcp --dport $TOX_PORT -j ACCEPT" >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo "iptables -A INPUT -i $WIFI_INTERFACE -p udp --dport $ZERONET_PORT -j ACCEPT" >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo "iptables -A INPUT -i $WIFI_INTERFACE -p tcp --dport $ZERONET_PORT -j ACCEPT" >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo "iptables -A INPUT -i $WIFI_INTERFACE -p udp --dport $TRACKER_PORT -j ACCEPT" >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo "iptables -A INPUT -i $WIFI_INTERFACE -p tcp --dport $TRACKER_PORT -j ACCEPT" >> $rootdir/$MESH_FIREWALL_SCRIPT
    echo "iptables -A INPUT -i $WIFI_INTERFACE -p udp --dport 1900 -j ACCEPT" >> $rootdir/$MESH_FIREWALL_SCRIPT
    chmod +x $rootdir/$MESH_FIREWALL_SCRIPT

    echo '[Unit]' > $FIREWALL_FILENAME
    echo 'Description=Mesh Firewall' >> $FIREWALL_FILENAME
    echo '' >> $FIREWALL_FILENAME
    echo '[Service]' >> $FIREWALL_FILENAME
    echo 'Type=oneshot' >> $FIREWALL_FILENAME
    echo "ExecStart=$MESH_FIREWALL_SCRIPT" >> $FIREWALL_FILENAME
    echo 'RemainAfterExit=no' >> $FIREWALL_FILENAME
    echo '' >> $FIREWALL_FILENAME
    echo 'TimeoutSec=30' >> $FIREWALL_FILENAME
    echo '' >> $FIREWALL_FILENAME
    echo '[Install]' >> $FIREWALL_FILENAME
    echo 'WantedBy=multi-user.target' >> $FIREWALL_FILENAME
    chroot "$rootdir" systemctl enable meshfirewall
}

mesh_tox_node() {
    TOX_REPO='git://github.com/irungentoo/toxcore.git'
    TOX_COMMIT='73b2144edcfd1ca617e9054479b66ab0c0361a14'
    # These are some default nodes, but you can replace them with trusted nodes
    # as you prefer. See https://wiki.tox.im/Nodes
    TOX_NODES=
    #TOX_NODES=(
    #  '192.254.75.102,2607:5600:284::2,33445,951C88B7E75C867418ACDB5D273821372BB5BD652740BCDF623A4FA293E75D2F,Tox RELENG,US'
    #  '144.76.60.215,2a01:4f8:191:64d6::1,33445,04119E835DF3E78BACF0F84235B300546AF8B936F035185E2A8E9E0A67C8924F,sonOfRa,DE'
    #)

    chroot "$rootdir" apt-get -y install build-essential libtool autotools-dev
    chroot "$rootdir" apt-get -y install automake checkinstall check git yasm
    chroot "$rootdir" apt-get -y install libsodium13 libsodium-dev libcap2-bin
    chroot "$rootdir" apt-get -y install libconfig9 libconfig-dev

    chroot "$rootdir" git clone $TOX_REPO $INSTALL_DIR/toxcore
    chroot "$rootdir" cd $INSTALL_DIR/toxcore
    chroot "$rootdir" git checkout $TOX_COMMIT -b $TOX_COMMIT

    chroot "$rootdir" autoreconf -i
    chroot "$rootdir" ./configure --enable-daemon
    chroot "$rootdir" make
    chroot "$rootdir" make install
    chroot "$rootdir" cp /usr/local/lib/libtoxcore* /usr/lib/

    if [ ! -f $rootdir/usr/local/bin/tox-bootstrapd ]; then
        echo $"File not found /usr/local/bin/tox-bootstrapd"
        return
    fi

    chroot "$rootdir" useradd --home-dir /var/lib/tox-bootstrapd --create-home --system --shell /sbin/nologin --comment $"Account to run Tox's DHT bootstrap daemon" --user-group tox-bootstrapd
    chroot "$rootdir" chmod 700 /var/lib/tox-bootstrapd
    if [ ! -f $rootdir/$INSTALL_DIR/toxcore/other/bootstrap_daemon/tox-bootstrapd.conf ]; then
        echo $"File not found $INSTALL_DIR/toxcore/other/bootstrap_daemon/tox-bootstrapd.conf"
    fi
    # remove Maildir
    if [ -d $rootdir/var/lib/tox-bootstrapd/Maildir ]; then
        rm -rf $rootdir/var/lib/tox-bootstrapd/Maildir
    fi

    # create configuration file
    echo "port = $TOX_PORT" > $rootdir/etc/tox-bootstrapd.conf
    echo 'keys_file_path = "/var/lib/tox-bootstrapd/keys"' >> $rootdir/etc/tox-bootstrapd.conf
    echo 'pid_file_path = "/var/run/tox-bootstrapd/tox-bootstrapd.pid"' >> $rootdir/etc/tox-bootstrapd.conf
    echo 'enable_ipv6 = true' >> $rootdir/etc/tox-bootstrapd.conf
    echo 'enable_ipv4_fallback = true' >> $rootdir/etc/tox-bootstrapd.conf
    echo 'enable_lan_discovery = true' >> $rootdir/etc/tox-bootstrapd.conf
    echo 'enable_tcp_relay = true' >> $rootdir/etc/tox-bootstrapd.conf
    echo "tcp_relay_ports = [443, 3389, $TOX_PORT]" >> $rootdir/etc/tox-bootstrapd.conf
    echo 'enable_motd = true' >> $rootdir/etc/tox-bootstrapd.conf
    echo 'motd = "tox-bootstrapd"' >> $rootdir/etc/tox-bootstrapd.conf

    if [ $TOX_NODES ]; then
        echo 'bootstrap_nodes = (' >> $rootdir/etc/tox-bootstrapd.conf
        toxcount=0
        while [ "x${TOX_NODES[toxcount]}" != "x" ]
        do
            toxval_ipv4=$(echo $TOX_NODES[toxcount] | awk -F ',' '{print $1}')
            toxval_ipv6=$(echo $TOX_NODES[toxcount] | awk -F ',' '{print $2}')
            toxval_port=$(echo $TOX_NODES[toxcount] | awk -F ',' '{print $3}')
            toxval_pubkey=$(echo $TOX_NODES[toxcount] | awk -F ',' '{print $4}')
            toxval_maintainer=$(echo $TOX_NODES[toxcount] | awk -F ',' '{print $5}')
            echo "{ // $toxval_maintainer" >> $rootdir/etc/tox-bootstrapd.conf
            if [[ $toxval_ipv6 != 'NONE' ]]; then
                echo "  address = \"$toxval_ipv6\"" >> $rootdir/etc/tox-bootstrapd.conf
            else
                echo "  address = \"$toxval_ipv4\"" >> $rootdir/etc/tox-bootstrapd.conf
            fi
            echo "  port = $toxval_port" >> $rootdir/etc/tox-bootstrapd.conf
            echo "  public_key = \"$toxval_pubkey\"" >> $rootdir/etc/tox-bootstrapd.conf
            toxcount=$(( $toxcount + 1 ))
            if [ "x${TOX_NODES[toxcount]}" != "x" ]; then
                echo "}," >> $rootdir/etc/tox-bootstrapd.conf
            else
                echo "}" >> $rootdir/etc/tox-bootstrapd.conf
            fi
        done
        echo ')' >> $rootdir/etc/tox-bootstrapd.conf
    fi

    if [ ! -f $rootdir/$INSTALL_DIR/toxcore/other/bootstrap_daemon/tox-bootstrapd.service ]; then
        echo $"File not found $INSTALL_DIR/toxcore/other/bootstrap_daemon/tox-bootstrapd.service"
    fi
    cp $rootdir/$INSTALL_DIR/toxcore/other/bootstrap_daemon/tox-bootstrapd.service $rootdir/etc/systemd/system/

    chroot "$rootdir" systemctl enable tox-bootstrapd.service
}

function mesh_tox_client {
    chroot "$rootdir" apt-get -y install libncursesw5-dev libconfig-dev libqrencode-dev libcurl4-openssl-dev

    chroot "$rootdir" git clone $TOXIC_REPO $INSTALL_DIR/toxic
    chroot "$rootdir" cd $INSTALL_DIR/toxic
    chroot "$rootdir" git checkout $TOXIC_COMMIT -b $TOXIC_COMMIT
    echo "Toxic commit:$TOXIC_COMMIT" >> $rootdir$COMPLETION_FILE

    chroot "$rootdir" make
    chroot "$rootdir" make install
}

function mesh_zeronet {
    ZERONET_REPO='https://github.com/HelloZeroNet/ZeroNet.git'
    ZERONET_COMMIT='675bd462556c541d65e2d95f91f899146a373aad'

    chroot "$rootdir" apt-get -y install python python-msgpack python-gevent
    chroot "$rootdir" apt-get -y install python-pip bittornado
    chroot "$rootdir" pip install msgpack-python --upgrade

    chroot "$rootdir" useradd -d /opt/zeronet/ -s /bin/false zeronet
    git clone $ZERONET_REPO $rootdir/opt/zeronet
    if [ ! -d $rootdir/opt/zeronet ]; then
        echo 'WARNING: Unable to clone zeronet'
        return
    fi
    cd $rootdir/opt/zeronet
    git checkout $ZERONET_COMMIT -b $ZERONET_COMMIT
    echo "ZeroNet commit:$ZERONET_COMMIT" >> $rootdir$COMPLETION_FILE
    chown -R zeronet:zeronet $rootdir/opt/zeronet

    # Hack to ensure that the file access port is opened
    # This is because zeronet normally relies on an internet site
    # to do this, but on a purely local mesh the internet isn't available
    sed -i 's|fileserver_port = 0|fileserver_port = config.fileserver_port\n            sys.modules["main"].file_server.port_opened = True|g' $rootdir/opt/zeronet/src/Site/Site.py

    echo '[Unit]' > $rootdir/etc/systemd/system/zeronet.service
    echo 'Description=Zeronet Server' >> $rootdir/etc/systemd/system/zeronet.service
    echo 'After=syslog.target' >> $rootdir/etc/systemd/system/zeronet.service
    echo 'After=network.target' >> $rootdir/etc/systemd/system/zeronet.service
    echo '[Service]' >> $rootdir/etc/systemd/system/zeronet.service
    echo 'Type=simple' >> $rootdir/etc/systemd/system/zeronet.service
    echo 'User=zeronet' >> $rootdir/etc/systemd/system/zeronet.service
    echo 'Group=zeronet' >> $rootdir/etc/systemd/system/zeronet.service
    echo 'WorkingDirectory=/opt/zeronet' >> $rootdir/etc/systemd/system/zeronet.service
    echo 'ExecStart=/usr/bin/python zeronet.py --ip_external replace.local --trackers_file /opt/zeronet/bootstrap' >> $rootdir/etc/systemd/system/zeronet.service
    echo '' >> $rootdir/etc/systemd/system/zeronet.service
    echo 'TimeoutSec=300' >> $rootdir/etc/systemd/system/zeronet.service
    echo '' >> $rootdir/etc/systemd/system/zeronet.service
    echo '[Install]' >> $rootdir/etc/systemd/system/zeronet.service
    echo 'WantedBy=multi-user.target' >> $rootdir/etc/systemd/system/zeronet.service

    echo '[Unit]' > $rootdir/etc/systemd/system/tracker.service
    echo 'Description=Torrent Tracker' >> $rootdir/etc/systemd/system/tracker.service
    echo 'After=syslog.target' >> $rootdir/etc/systemd/system/tracker.service
    echo 'After=network.target' >> $rootdir/etc/systemd/system/tracker.service
    echo '[Service]' >> $rootdir/etc/systemd/system/tracker.service
    echo 'Type=simple' >> $rootdir/etc/systemd/system/tracker.service
    echo 'User=tracker' >> $rootdir/etc/systemd/system/tracker.service
    echo 'Group=tracker' >> $rootdir/etc/systemd/system/tracker.service
    echo 'WorkingDirectory=/opt/tracker' >> $rootdir/etc/systemd/system/tracker.service
    echo "ExecStart=/usr/bin/bttrack --port $TRACKER_PORT --dfile /opt/tracker/dstate --logfile /opt/tracker/tracker.log --nat_check 0 --scrape_allowed full --ipv6_enabled 0" >> $rootdir/etc/systemd/system/tracker.service
    echo '' >> $rootdir/etc/systemd/system/tracker.service
    echo 'TimeoutSec=300' >> $rootdir/etc/systemd/system/tracker.service
    echo '' >> $rootdir/etc/systemd/system/tracker.service
    echo '[Install]' >> $rootdir/etc/systemd/system/tracker.service
    echo 'WantedBy=multi-user.target' >> $rootdir/etc/systemd/system/tracker.service

    chroot "$rootdir" useradd -d /opt/tracker/ -s /bin/false tracker
    if [ ! -d $rootdir/opt/tracker ]; then
        mkdir $rootdir/opt/tracker
    fi
    chown -R tracker:tracker $rootdir/opt/tracker

    # publish regularly
    echo "* *     * * *   root    zeronetavahi > /dev/null" >> $rootdir/etc/crontab

    chroot "$rootdir" systemctl enable tracker.service
    chroot "$rootdir" systemctl enable zeronet.service
}

initialise_mesh() {
    if [[ $VARIANT != "mesh" ]]; then
        return
    fi
    mesh_firewall
    mesh_avahi
    mesh_batman
    mesh_tox_node
    mesh_tox_client
    mesh_zeronet

    MESH_SERVICE='mesh-setup.service'
    MESH_SETUP_DAEMON=$rootdir/etc/systemd/system/$MESH_SERVICE

    echo '[Unit]' > $MESH_SETUP_DAEMON
    echo 'Description=Initial mesh router configuration' >> $MESH_SETUP_DAEMON
    echo 'After=syslog.target' >> $MESH_SETUP_DAEMON
    echo 'After=network.target' >> $MESH_SETUP_DAEMON
    echo '[Service]' >> $MESH_SETUP_DAEMON
    echo 'Type=simple' >> $MESH_SETUP_DAEMON
    echo 'User=root' >> $MESH_SETUP_DAEMON
    echo 'Group=root' >> $MESH_SETUP_DAEMON
    echo 'WorkingDirectory=/root' >> $MESH_SETUP_DAEMON
    echo "ExecStart=/usr/local/bin/${PROJECT_NAME}-image-mesh > /var/log/mesh-setup.log" >> $MESH_SETUP_DAEMON
    echo '' >> $MESH_SETUP_DAEMON
    echo 'TimeoutSec=99999' >> $MESH_SETUP_DAEMON
    echo '' >> $MESH_SETUP_DAEMON
    echo '[Install]' >> $MESH_SETUP_DAEMON
    echo 'WantedBy=multi-user.target' >> $MESH_SETUP_DAEMON
    chroot "$rootdir" systemctl enable $MESH_SERVICE
}

# Set to true/false to control if eatmydata is used during build
use_eatmydata=true

rootdir="$1"
fmdir="$(pwd)"
image="$fmdir"/"$2"
cd "$rootdir"

echo info: building $MACHINE for $ARCHITECTURE

export DEBIAN_FRONTEND=noninteractive DEBCONF_NONINTERACTIVE_SEEN=true
export LC_ALL=C LANGUAGE=C LANG=C

# Override libpam-tmpdir setting during build, as the directories
# are not created yet.
export TMP=/tmp/ TMPDIR=/tmp/

username=$MY_USERNAME
echo $"warning: creating initial user $username with well known password!"
password=$MY_PASSWORD
chroot "$rootdir" adduser --gecos $username --disabled-password $username
echo $username:$password | chroot $rootdir /usr/sbin/chpasswd
chroot "$rootdir" adduser $username sudo

case "$MACHINE" in
    virtualbox)
        # hide irrelevant console keyboard messages.
        echo "echo \"4 4 1 7\" > /proc/sys/kernel/printk" \
            >> /etc/init.d/rc.local
        ;;
    qemu)
        # hide irrelevant console keyboard messages.
        echo "echo \"4 4 1 7\" > /proc/sys/kernel/printk" \
            >> /etc/init.d/rc.local
        ;;
esac

set_apt_sources $BUILD_MIRROR
chroot "$rootdir" apt-get clean
chroot "$rootdir" rm -rf /var/lib/apt/lists/*
chroot "$rootdir" apt-get clean
chroot "$rootdir" apt-get update

cat > $rootdir/usr/sbin/policy-rc.d <<EOF
#!/bin/sh
exit 101
EOF
chmod a+rx $rootdir/usr/sbin/policy-rc.d

if $use_eatmydata ; then
    enable_eatmydata_override
fi

if [ -n "$CUSTOM_SETUP" ]; then
    cp "$CUSTOM_SETUP" "$rootdir"/tmp
    chroot "$rootdir" apt-get install -y gdebi-core
    chroot "$rootdir" gdebi -n /tmp/"$(basename $CUSTOM_SETUP)"
fi

chroot "$rootdir" apt-get install -y sudo git dialog toilet build-essential openssh-server
chroot "$rootdir" apt-get install -y avahi-daemon avahi-utils avahi-discover avahi-autoipd
chroot "$rootdir" apt-get install -y iptables dnsutils net-tools network-manager iputils-ping
chroot "$rootdir" apt-get install -y libnss-mdns libnss-myhostname libnss-gw-name nano man ntp
chroot "$rootdir" apt-get install -y locales locales-all debconf

sed -i "s|#host-name=.*|host-name=${PROJECT_NAME}|g" $rootdir/etc/avahi/avahi-daemon.conf

chroot "$rootdir" /bin/bash -x <<EOF
git clone $PROJECT_REPO /root/$PROJECT_NAME
cd /root/$PROJECT_NAME
make install
EOF

chroot "$rootdir" ${PROJECT_NAME}-image-hardware-setup 2>&1 | \
    tee $rootdir/var/log/${PROJECT_NAME}-image-hardware-setup.log

rm $rootdir/usr/sbin/policy-rc.d

# Set up HRNG for systems known to have one
# Otherwise install haveged
if [[ "$MACHINE" != "beaglebone" ]]; then
    chroot $rootdir apt-get -y install haveged
else
    chroot $rootdir apt-get -y install rng-tools
    sed -i 's|#HRNGDEVICE=/dev/hwrng|HRNGDEVICE=/dev/hwrng|g' $rootdir/etc/default/rng-tools
fi

# copy u-boot to beginning of image
case "$MACHINE" in
    beaglebone)
        dd if=$rootdir/usr/lib/u-boot/am335x_boneblack/MLO of="$image" \
           count=1 seek=1 conv=notrunc bs=128k
        dd if=$rootdir/usr/lib/u-boot/am335x_boneblack/u-boot.img of="$image" \
           count=2 seek=1 conv=notrunc bs=384k
        ;;
    cubieboard2)
        dd if=$rootdir/usr/lib/u-boot/Cubieboard2/u-boot-sunxi-with-spl.bin of="$image" \
           seek=8 conv=notrunc bs=1k
        ;;
    a20-olinuxino-lime)
        dd if=$rootdir/usr/lib/u-boot/A20-OLinuXino-Lime/u-boot-sunxi-with-spl.bin \
           of="$image" seek=8 conv=notrunc bs=1k
        ;;
esac

if $use_eatmydata ; then
    disable_eatmydata_override
fi

set_apt_sources $MIRROR
chroot "$rootdir" apt-get update

configure_ssh
configure_networking
admin_user_sudo
create_generic_image
atheros_wifi
continue_installation
initialise_mesh

cd /
echo $"info: killing leftover processes in chroot"
fuser -mvk $rootdir/. || true