Marc S. Weidner
c2e2650287
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Signed-off-by: Marc S. Weidner <msw@coresecret.dev>
225 lines
6.5 KiB
Bash
225 lines
6.5 KiB
Bash
#!/bin/sh
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# bashsupport disable=BP5007
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# shellcheck disable=SC2249
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# shellcheck shell=sh
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# SPDX-Version: 3.0
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# SPDX-CreationInfo: 2025-12-03; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.live.builder.git
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# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
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# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-FileType: SOURCE
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# SPDX-License-Identifier: GPL-3.0-or-later
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# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
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# SPDX-PackageName: CISS.debian.live.builder
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# SPDX-Security-Contact: security@coresecret.eu
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### Modified Version of the original file:
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### https://salsa.debian.org/live-team/live-boot 'components/9990-networking.sh'
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### Change the behavior so that the systemd-networkd stack '/etc/resolv.conf' is not overwritten.
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# set -e
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printf "\e[95m[INFO] Sourcing : [/usr/lib/live/boot/9990-networking.sh] \n\e[0m"
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Device_from_bootif ()
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{
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# Support for Syslinux IPAPPEND parameter
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# it sets the BOOTIF variable on the kernel parameter
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if [ -n "${BOOTIF}" ]
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then
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# Pxelinux sets BOOTIF to a value based on the mac address of the
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# network card used to PXE boot, so use this value for DEVICE rather
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# than a hard-coded device name from initramfs.conf. This facilitates
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# network booting when machines may have multiple network cards.
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# Pxelinux sets BOOTIF to 01-$mac_address
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# Strip off the leading "01-", which isn't part of the mac
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# address
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temp_mac=${BOOTIF#*-}
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# Convert to the typical mac address format by replacing "-" with ":"
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bootif_mac=""
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IFS='-'
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for x in ${temp_mac}
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do
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if [ -z "${bootif_mac}" ]
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then
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bootif_mac="${x}"
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else
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bootif_mac="${bootif_mac}:${x}"
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fi
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done
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unset IFS
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# Look for devices with matching mac address and set DEVICE to
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# appropriate value if match is found.
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for device in /sys/class/net/*
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do
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if [ -f "${device}/address" ]
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then
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current_mac=$(cat "${device}/address")
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if [ "${bootif_mac}" = "${current_mac}" ]
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then
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DEVICE=${device##*/}
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break
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fi
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fi
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done
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fi
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}
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do_netsetup ()
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{
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printf "\e[95m[INFO] do_netsetup() : [/usr/lib/live/boot/9990-networking.sh] \n\e[0m"
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modprobe -q af_packet # For DHCP
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udevadm trigger
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udevadm settle
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[ -n "${ETHDEV_TIMEOUT}" ] || ETHDEV_TIMEOUT=15
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echo "Using timeout of ${ETHDEV_TIMEOUT} seconds for network configuration."
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if [ -z "${NETBOOT}" ] && [ -z "${FETCH}" ] && [ -z "${HTTPFS}" ] && [ -z "${FTPFS}" ]
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then
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# See if we can select the device from BOOTIF
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Device_from_bootif
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# if ethdevice was not specified on the kernel command line,
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# make sure we try to get a working network configuration
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# for *every* present network device (except for loopback of course)
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if [ -z "${ETHDEVICE}" ]
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then
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echo "If you want to boot from a specific device use bootoption ethdevice=..."
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for device in /sys/class/net/*
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do
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dev=${device##*/}
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if [ "${dev}" != "lo" ]
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then
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ETHDEVICE="${ETHDEVICE} ${dev}"
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fi
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done
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fi
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# Split args of ethdevice=eth0,eth1 into "eth0 eth1"
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for device in $(echo "${ETHDEVICE}" | sed 's/,/ /g')
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do
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devlist="${devlist} ${device}"
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done
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for dev in ${devlist}
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do
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echo "Executing ipconfig -t ${ETHDEV_TIMEOUT} ${dev}"
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ipconfig -t "${ETHDEV_TIMEOUT}" "${dev}" | tee -a /netboot.config
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# if configuration of a device worked, we should have an assigned
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# IP address, if so, let's use the device as $DEVICE for later usage.
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# Simple and primitive approach, which seems to work fine
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if ifconfig "${dev}" | grep -q -E 'inet.*addr:|inet [0-9][0-9]*.[0-9][0-9]*.[0-9][0-9]*.[0-9][0-9]*'
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then
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export DEVICE="${dev}"
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break
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fi
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done
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else
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for interface in ${DEVICE}; do
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ipconfig -t "${ETHDEV_TIMEOUT}" "${interface}" | tee "/netboot-${interface}.config"
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# shellcheck disable=SC1090
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[ -e "/run/net-${interface}.conf" ] && . "/run/net-${interface}.conf"
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if [ "${IPV4ADDR}" != "0.0.0.0" ]
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then
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break
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fi
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done
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fi
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for interface in ${DEVICE}
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do
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# source relevant ipconfig output
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OLDHOSTNAME=${HOSTNAME}
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# shellcheck disable=SC1090
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[ -e "/run/net-${interface}.conf" ] && . "/run/net-${interface}.conf"
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[ -z "${HOSTNAME}" ] && HOSTNAME="${OLDHOSTNAME}"
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export HOSTNAME
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if [ -n "${interface}" ]
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then
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# HWADDR used by do_iscsi from 9990-mount-iscsi.sh
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# shellcheck disable=SC2034
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HWADDR="$(cat "/sys/class/net/${interface}/address")"
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fi
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if [ ! -e "/etc/hostname" ] && [ -n "${HOSTNAME}" ]
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then
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echo "Creating /etc/hostname"
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echo "${HOSTNAME}" > /etc/hostname
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fi
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# Only create /etc/hosts if FQDN is known (to let 'hostname -f' query
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# this file). Otherwise, DNS will be queried to determine the FQDN.
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if [ ! -e "/etc/hosts" ] && [ -n "${DNSDOMAIN}" ]
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then
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echo "Creating /etc/hosts"
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cat > /etc/hosts <<EOF
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127.0.0.1 localhost
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127.0.1.1 ${HOSTNAME}.${DNSDOMAIN} ${HOSTNAME}
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# The following lines are desirable for IPv6 capable hosts
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::1 localhost ip6-localhost ip6-loopback
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ff02::1 ip6-allnodes
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ff02::2 ip6-allrouters
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EOF
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fi
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if [ ! -e "/etc/resolv.conf" ]
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then
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echo "Creating /etc/resolv.conf"
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if [ -n "${DNSDOMAIN}" ]
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then
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echo "domain ${DNSDOMAIN}" > /etc/resolv.conf
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fi
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for i in ${IPV4DNS0} ${IPV4DNS1} ${IPV4DNS1} ${DNSSERVERS}; do
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case "${i}" in
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""|0.0.0.0|dhcp|DHCP)
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continue
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;;
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esac
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echo "nameserver ${i}" >> /etc/resolv.conf
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done
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if [ -n "${DOMAINSEARCH}" ]
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then
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echo "search ${DOMAINSEARCH}" >> /etc/resolv.conf
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elif [ -n "${DNSDOMAIN}" ]
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then
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echo "search ${DNSDOMAIN}" >> /etc/resolv.conf
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fi
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fi
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# Check if we have a network device at all
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if ! ls /sys/class/net/"${interface}" > /dev/null 2>&1 && \
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! ls /sys/class/net/eth0 > /dev/null 2>&1 && \
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! ls /sys/class/net/wlan0 > /dev/null 2>&1 && \
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! ls /sys/class/net/ath0 > /dev/null 2>&1 && \
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! ls /sys/class/net/ra0 > /dev/null 2>&1
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then
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panic "No supported network device found, maybe a non-mainline driver is required."
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fi
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done
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printf "\e[92m[INFO] Successfully applied : [/usr/lib/live/boot/9990-networking.sh/do_netsetup()] \n\e[0m"
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}
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