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#
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# Setup Networking
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#
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# Load utility functions
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. ./functions.sh
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# Install and setup hostname
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install_readonly files/network/hostname "${ETC_DIR}/hostname"
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sed -i "s/^rpi2-jessie/${HOSTNAME}/" "${ETC_DIR}/hostname"
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# Install and setup hosts
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install_readonly files/network/hosts "${ETC_DIR}/hosts"
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sed -i "s/rpi2-jessie/${HOSTNAME}/" "${ETC_DIR}/hosts"
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# Setup hostname entry with static IP
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if [ "$NET_ADDRESS" != "" ] ; then
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NET_IP=$(echo "${NET_ADDRESS}" | cut -f 1 -d'/')
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sed -i "s/^127.0.1.1/${NET_IP}/" "${ETC_DIR}/hosts"
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fi
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# Remove IPv6 hosts
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if [ "$ENABLE_IPV6" = false ] ; then
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sed -i -e "/::[1-9]/d" -e "/^$/d" "${ETC_DIR}/hosts"
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fi
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# Install hint about network configuration
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install_readonly files/network/interfaces "${ETC_DIR}/network/interfaces"
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# Install configuration for interface eth0
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install_readonly files/network/eth.network "${ETC_DIR}/systemd/network/eth.network"
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if [ "$ENABLE_DHCP" = true ] ; then
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# Enable DHCP configuration for interface eth0
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sed -i -e "s/DHCP=.*/DHCP=yes/" -e "/DHCP/q" "${ETC_DIR}/systemd/network/eth.network"
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# Set DHCP configuration to IPv4 only
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if [ "$ENABLE_IPV6" = false ] ; then
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sed -i "s/DHCP=.*/DHCP=v4/" "${ETC_DIR}/systemd/network/eth.network"
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fi
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else # ENABLE_DHCP=false
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# Set static network configuration for interface eth0
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sed -i\
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-e "s|DHCP=.*|DHCP=no|"\
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-e "s|Address=\$|Address=${NET_ADDRESS}|"\
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-e "s|Gateway=\$|Gateway=${NET_GATEWAY}|"\
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-e "0,/DNS=\$/ s|DNS=\$|DNS=${NET_DNS_1}|"\
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-e "0,/DNS=\$/ s|DNS=\$|DNS=${NET_DNS_2}|"\
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-e "s|Domains=\$|Domains=${NET_DNS_DOMAINS}|"\
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-e "0,/NTP=\$/ s|NTP=\$|NTP=${NET_NTP_1}|"\
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-e "0,/NTP=\$/ s|NTP=\$|NTP=${NET_NTP_2}|"\
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"${ETC_DIR}/systemd/network/eth.network"
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fi
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# Remove empty settings from network configuration
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sed -i "/.*=\$/d" "${ETC_DIR}/systemd/network/eth.network"
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# Move systemd network configuration if required by Debian release stretch or buster
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if [ "$RELEASE" = "stretch" ] || [ "$RELEASE" = "buster" ] ; then
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mv -v "${ETC_DIR}/systemd/network/eth.network" "${LIB_DIR}/systemd/network/10-eth.network"
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rm -fr "${ETC_DIR}/systemd/network"
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fi
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# Enable systemd-networkd service
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chroot_exec systemctl enable systemd-networkd
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# Install host.conf resolver configuration
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install_readonly files/network/host.conf "${ETC_DIR}/host.conf"
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# Enable network stack hardening
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if [ "$ENABLE_HARDNET" = true ] ; then
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# Install sysctl.d configuration files
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install_readonly files/sysctl.d/82-rpi-net-hardening.conf "${ETC_DIR}/sysctl.d/82-rpi-net-hardening.conf"
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# Setup resolver warnings about spoofed addresses
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sed -i "s/^# spoof warn/spoof warn/" "${ETC_DIR}/host.conf"
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fi
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# Enable time sync
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if [ "NET_NTP_1" != "" ] ; then
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chroot_exec systemctl enable systemd-timesyncd.service
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fi
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# Download the firmware binary blob required to use the RPi3 wireless interface
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if [ "$ENABLE_WIRELESS" = true ] ; then
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if [ ! -d ${WLAN_FIRMWARE_DIR} ] ; then
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mkdir -p ${WLAN_FIRMWARE_DIR}
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fi
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# Create temporary directory for firmware binary blob
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temp_dir=$(sudo -u nobody mktemp -d)
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# Fetch firmware binary blob
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sudo -u nobody wget -q -O "${temp_dir}/brcmfmac43430-sdio.bin" "${WLAN_FIRMWARE_URL}/brcmfmac43430-sdio.bin"
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sudo -u nobody wget -q -O "${temp_dir}/brcmfmac43430-sdio.txt" "${WLAN_FIRMWARE_URL}/brcmfmac43430-sdio.txt"
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# Move downloaded firmware binary blob
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mv "${temp_dir}/brcmfmac43430-sdio."* "${WLAN_FIRMWARE_DIR}/"
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# Remove temporary directory for firmware binary blob
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rm -fr "${temp_dir}"
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# Set permissions of the firmware binary blob
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chown root:root "${WLAN_FIRMWARE_DIR}/brcmfmac43430-sdio."*
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chmod 600 "${WLAN_FIRMWARE_DIR}/brcmfmac43430-sdio."*
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fi
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