V8.00.000.2025.06.17
Signed-off-by: Marc S. Weidner <msw@coresecret.dev>
This commit is contained in:
364
func/4130_setup_network.sh
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364
func/4130_setup_network.sh
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@@ -0,0 +1,364 @@
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#!/bin/bash
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# SPDX-Version: 3.0
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# SPDX-CreationInfo: 2025-06-17; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.installer.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: EUPL-1.2 OR LicenseRef-CCLA-1.0
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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.installer
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# SPDX-Security-Contact: security@coresecret.eu
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guard_sourcing
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# Setup network
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setup_network() {
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do_in_target "${TARGET}" apt-get install -y isc-dhcp-client ifupdown
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mkdir -p "${TARGET}/etc/network/interfaces/interfaces.d"
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declare var_auto_nic="" var_auto_ipv4_ccidr="" var_auto_ipv4_subnet="" var_auto_ipv4="" var_auto_ipv4_gw="" \
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var_auto_ipv6_ccidr="" var_auto_ipv6="" var_auto_ipv6_gw="" var_link_ipv4="" var_link_ipv6="" var_auto_fqdn=""
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declare -a ary_ipv4_ns ary_ipv6_ns
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ary_ipv4_ns+=("${network_static_ipv4nameserver_0}")
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[[ -n "${network_static_ipv4nameserver_1}" ]] && ary_ipv4_ns+=("${network_static_ipv4nameserver_1}")
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[[ -n "${network_static_ipv4nameserver_2}" ]] && ary_ipv4_ns+=("${network_static_ipv4nameserver_2}")
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[[ -n "${network_static_ipv4nameserver_fallback_0}" ]] && ary_ipv4_ns+=("${network_static_ipv4nameserver_fallback_0}")
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[[ -n "${network_static_ipv4nameserver_fallback_1}" ]] && ary_ipv4_ns+=("${network_static_ipv4nameserver_fallback_1}")
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ary_ipv6_ns+=("${network_static_ipv6nameserver_0}")
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[[ -n "${network_static_ipv6nameserver_1}" ]] && ary_ipv6_ns+=("${network_static_ipv6nameserver_1}")
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[[ -n "${network_static_ipv6nameserver_2}" ]] && ary_ipv6_ns+=("${network_static_ipv6nameserver_2}")
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[[ -n "${network_static_ipv6nameserver_fallback_0}" ]] && ary_ipv6_ns+=("${network_static_ipv6nameserver_fallback_0}")
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[[ -n "${network_static_ipv6nameserver_fallback_1}" ]] && ary_ipv6_ns+=("${network_static_ipv6nameserver_fallback_1}")
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### Check current network connection and configure variables
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var_auto_nic=$(ip -o link show | awk -F': ' '/state UP/ && $2!="lo" {print $2; exit}')
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var_auto_ipv4_ccidr=$(ip -4 -o addr show "${var_auto_nic}" | awk '{print $4; exit}')
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var_auto_ipv4_subnet=$(generate_subnetmask "${var_auto_ipv4_ccidr}")
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var_auto_ipv4=$(echo "${var_auto_ipv4_ccidr}" | awk -F'/' '{print $1}')
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var_auto_ipv4_gw=$(ip route show default dev "${var_auto_nic}" | awk '/^default/ {print $3; exit}')
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var_auto_ipv6_ccidr=$(ip -6 -o addr show "${var_auto_nic}" | awk '/scope global/ {print $4; exit}')
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if [[ -n "${var_auto_ipv6_ccidr}" ]]; then
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var_auto_ipv6=$(echo "${var_auto_ipv6_ccidr}" | awk -F'/' '{print $1}')
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var_auto_ipv6_gw=$(ip -6 route show default dev "${var_auto_nic}" | awk '/^default/ {print $3; exit}')
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fi
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var_link_ipv4=$(ping -q -c 1 -W 1 -4 debian.org > /dev/null 2>&1 && echo "true" || echo "false")
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var_link_ipv6=$(ping -q -c 1 -W 1 -6 debian.org > /dev/null 2>&1 && echo "true" || echo "false")
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if [[ -f "/var/lib/dhcp/dhclient.${var_auto_nic}.leases" ]]; then
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var_auto_fqdn=$(grep -m1 'option host-name' "/var/lib/dhcp/dhclient.${var_auto_nic}.leases" | sed -E 's/.*"([^"]+)".*/\1/')
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else
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var_auto_fqdn=""
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fi
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do_log "info" "false" "Live environment network check: Auto NIC ='${var_auto_nic}'."
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do_log "info" "false" "Live environment network check: Auto IPv4 ='${var_auto_ipv4}'."
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do_log "info" "false" "Live environment network check: Auto IPv4 CCIDR ='${var_auto_ipv4_ccidr}'."
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do_log "info" "false" "Live environment network check: Auto IPv4 Subnet ='${var_auto_ipv4_subnet}'."
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do_log "info" "false" "Live environment network check: Auto IPv4 Gateway ='${var_auto_ipv4_gw}'."
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do_log "info" "false" "Live environment network check: Auto IPv6 ='${var_auto_ipv6}'."
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do_log "info" "false" "Live environment network check: Auto IPv6 CCIDR ='${var_auto_ipv6_ccidr}'."
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do_log "info" "false" "Live environment network check: Auto IPv6 Gateway ='${var_auto_ipv6_gw}'."
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do_log "info" "false" "Live environment network check: Auto IPv4 Link ='${var_link_ipv4}'."
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do_log "info" "false" "Live environment network check: Auto IPv6 Link ='${var_link_ipv6}'."
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do_log "info" "false" "Live environment network check: Auto FQDN ='${var_auto_fqdn}'."
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### Create network configuration file header.
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if [[ -f "${TARGET}/etc/network/interfaces" ]]; then
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mkdir -p "${DIR_BAK}/etc/network"
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mv "${TARGET}/etc/network/interfaces" "${DIR_BAK}/etc/network/interfaces.bak"
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do_log "info" "false" "Existing '${TARGET}/etc/network/interfaces' moved."
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fi
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cat << EOF >| "${TARGET}/etc/network/interfaces"
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# SPDX-Version: 3.0
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# SPDX-CreationInfo: 2025-06-17; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.installer.git
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# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
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# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-FileType: SOURCE
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# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
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# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
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# SPDX-PackageName: CISS.debian.installer
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# SPDX-Security-Contact: security@coresecret.eu
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# This file describes the network interfaces available on your system
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# and how to activate them. For more information, see interfaces(5).
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source /etc/network/interfaces.d/*
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# The loopback network interface
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auto lo
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iface lo inet loopback
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# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
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EOF
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chmod 0644 "${TARGET}/etc/network/interfaces"
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do_log "info" "false" "Header '${TARGET}/etc/network/interfaces' created."
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### Configure network interfaces based on 'preseed.yaml' and create network configuration files for IPv4.
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if [[ "${network_autoconfig_enable,,}" == "true" && "${network_choose_interface_auto,,}" == "true" ]]; then
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### Reminder ###
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# auto:
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# For servers or systems with static interfaces that should always be available (e.g., eth0 on a server).
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# For configurations where the interface should be active regardless of the cable status.
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# allow-hotplug:
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# For systems with dynamic or removable network devices (e.g., laptops or USB adapters).
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# To avoid boot delays when interfaces are unavailable.
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cat << EOF >| "${TARGET}/etc/network/interfaces/interfaces.d/10-ipv4-dhcp"
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# SPDX-Version: 3.0
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# SPDX-CreationInfo: 2025-06-17; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.installer.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: EUPL-1.2 OR LicenseRef-CCLA-1.0
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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.installer
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# SPDX-Security-Contact: security@coresecret.eu
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# The primary network interface IPv4
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auto ${var_auto_nic}
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iface ${var_auto_nic} inet dhcp
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# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
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EOF
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chmod 0644 "${TARGET}/etc/network/interfaces/interfaces.d/10-ipv4-dhcp"
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do_log "info" "false" "IPv4 on the primary NIC: '${var_auto_nic}' configured with DHCP."
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elif [[ "${network_autoconfig_enable,,}" == "true" && "${network_choose_interface_auto,,}" == "false" ]]; then
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cat << EOF >| "${TARGET}/etc/network/interfaces/interfaces.d/10-ipv4-dhcp"
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# SPDX-Version: 3.0
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# SPDX-CreationInfo: 2025-06-17; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.installer.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: EUPL-1.2 OR LicenseRef-CCLA-1.0
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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.installer
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# SPDX-Security-Contact: security@coresecret.eu
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# The primary network interface IPv4
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auto ${network_choose_interface_static}
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iface ${network_choose_interface_static} inet dhcp
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# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
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EOF
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chmod 0644 "${TARGET}/etc/network/interfaces/interfaces.d/10-ipv4-dhcp"
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do_log "info" "false" "IPv4 on the primary NIC: '${network_choose_interface_static}' configured with DHCP."
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fi
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if [[ "${network_autoconfig_enable,,}" == "false" ]]; then
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cat << EOF >| "${TARGET}/etc/network/interfaces/interfaces.d/10-ipv4-static"
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# SPDX-Version: 3.0
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# SPDX-CreationInfo: 2025-06-17; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.installer.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: EUPL-1.2 OR LicenseRef-CCLA-1.0
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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.installer
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# SPDX-Security-Contact: security@coresecret.eu
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# The primary network interface IPv4
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auto ${network_choose_interface_static}
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iface ${network_choose_interface_static} inet static
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address ${network_static_ipv4address}
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netmask ${network_static_ipv4netmask}
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gateway ${network_static_ipv4gateway}
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dns-nameservers ${ary_ipv4_ns[*]}
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# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
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EOF
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chmod 0644 "${TARGET}/etc/network/interfaces/interfaces.d/10-ipv4-static"
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do_log "info" "false" "IPv4 on the primary NIC: '${network_choose_interface_static}' configured statically."
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fi
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### Configure network interfaces based on 'preseed.yaml' and create network configuration files for IPv6.
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if [[ "${network_autoconfig_enable,,}" == "true" && "${var_link_ipv6,,}" == "true" ]]; then
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cat << EOF >| "${TARGET}/etc/network/interfaces/interfaces.d/10-ipv6-dhcp"
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# SPDX-Version: 3.0
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# SPDX-CreationInfo: 2025-06-17; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.installer.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: EUPL-1.2 OR LicenseRef-CCLA-1.0
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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.installer
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# SPDX-Security-Contact: security@coresecret.eu
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# The primary network interface IPv6
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auto ${var_auto_nic}
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iface ${var_auto_nic} inet6 dhcp
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# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
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EOF
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chmod 0644 "${TARGET}/etc/network/interfaces/interfaces.d/10-ipv6-dhcp"
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do_log "info" "false" "IPv6 on the primary NIC: '${var_auto_nic}' configured with DHCP."
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fi
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if [[ "${network_autoconfig_enable,,}" == "false" && -n "${network_static_ipv6address}" ]]; then
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cat << EOF >| "${TARGET}/etc/network/interfaces/interfaces.d/10-ipv6-static"
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# SPDX-Version: 3.0
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# SPDX-CreationInfo: 2025-06-17; WEIDNER, Marc S.; <msw@coresecret.dev>
|
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# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.installer.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: EUPL-1.2 OR LicenseRef-CCLA-1.0
|
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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.installer
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# SPDX-Security-Contact: security@coresecret.eu
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# The primary network interface IPv6
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auto ${network_choose_interface_static}
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iface ${network_choose_interface_static} inet6 static
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address ${network_static_ipv6address}/${network_static_ipv6netmask}
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gateway ${network_static_ipv6gateway}
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dns-nameservers ${ary_ipv6_ns[*]}
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# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
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EOF
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chmod 0644 "${TARGET}/etc/network/interfaces/interfaces.d/10-ipv6-static"
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do_log "info" "false" "IPv6 on the primary NIC: '${network_choose_interface_static}' configured statically."
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fi
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if [[ -f "${TARGET}/etc/resolv.conf" ]]; then
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mkdir -p "${DIR_BAK}/etc"
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mv "${TARGET}/etc/resolv.conf" "${DIR_BAK}/etc/resolv.conf.bak"
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do_log "info" "false" "Existing '${TARGET}/etc/resolv.conf' moved."
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fi
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touch "${TARGET}/etc/resolv.conf"
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chmod 0644 "${TARGET}/etc/resolv.conf"
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### Create '/etc/resolv.conf' IPv4 entries for static configuration.
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if [[ "${network_autoconfig_enable,,}" == "false" ]]; then
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cat << EOF >> "${TARGET}/etc/resolv.conf"
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# SPDX-Version: 3.0
|
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# SPDX-CreationInfo: 2025-06-17; WEIDNER, Marc S.; <msw@coresecret.dev>
|
||||
# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.installer.git
|
||||
# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
|
||||
# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
|
||||
# SPDX-FileType: SOURCE
|
||||
# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
|
||||
# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
|
||||
# SPDX-PackageName: CISS.debian.installer
|
||||
# SPDX-Security-Contact: security@coresecret.eu
|
||||
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# Custom DNS IPv4 configuration
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EOF
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for ns in "${ary_ipv4_ns[@]}"; do
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echo "nameserver ${ns}" >> "${TARGET}/etc/resolv.conf"
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done
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echo "" >> "${TARGET}/etc/resolv.conf"
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do_log "info" "false" "IPv4 nameserver at: '${TARGET}/etc/resolv.conf' configured manually."
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fi
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### Create '/etc/resolv.conf' IPv6 entries for static configuration.
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if [[ "${network_autoconfig_enable,,}" == "false" && -n "${network_static_ipv6address}" ]]; then
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cat << EOF >> "${TARGET}/etc/resolv.conf"
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# Custom DNS IPv6 configuration
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EOF
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for ns in "${ary_ipv6_ns[@]}"; do
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echo "nameserver ${ns}" >> "${TARGET}/etc/resolv.conf"
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done
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echo "" >> "${TARGET}/etc/resolv.conf"
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do_log "info" "false" "IPv6 nameserver at: '${TARGET}/etc/resolv.conf' configured manually."
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fi
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cat << EOF >> "${TARGET}/etc/resolv.conf"
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# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
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EOF
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### Ensure Internet Systems Consortium DHCP Client is not overwriting the static nameserver settings.
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if [[ -f "${TARGET}/etc/dhcp/dhclient.conf" ]]; then
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mkdir -p "${DIR_BAK}/etc/dhcp"
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cp "${TARGET}/etc/dhcp/dhclient.conf" "${DIR_BAK}/etc/dhcp/dhclient.conf.bak"
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do_log "info" "false" "Existing '${TARGET}/etc/dhcp/dhclient.conf' saved."
|
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fi
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if [[ "${network_autoconfig_enable,,}" == "true" && -n "${network_static_ipv4nameserver_0}" ]]; then
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cat << EOF >> "${TARGET}/etc/dhcp/dhclient.conf"
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# Custom dhclient config to override DHCP DNS
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EOF
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declare var_supersede; var_supersede=$(printf "%s, " "${ary_ipv4_ns[@]}")
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var_supersede="${var_supersede%, }"
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echo "supersede domain-name-servers ${var_supersede};" >> "${TARGET}/etc/dhcp/dhclient.conf"
|
||||
|
||||
do_log "info" "false" "DHCP client configuration for IPv4: '${TARGET}/etc/dhcp/dhclient.conf' configured."
|
||||
|
||||
fi
|
||||
|
||||
if [[ "${network_autoconfig_enable,,}" == "false" && -n "${network_static_ipv6nameserver_0}" ]]; then
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||||
|
||||
declare var_supersede_ipv6; var_supersede_ipv6=$(printf "%s, " "${ary_ipv6_ns[@]}")
|
||||
var_supersede_ipv6="${var_supersede_ipv6%, }"
|
||||
echo "supersede domain-name-servers ${var_supersede_ipv6};" >> "${TARGET}/etc/dhcp/dhclient.conf"
|
||||
|
||||
do_log "info" "false" "DHCP client configuration for IPv6: '${TARGET}/etc/dhcp/dhclient.conf' configured."
|
||||
|
||||
fi
|
||||
|
||||
if [[ "${network_autoconfig_enable,,}" == "true" && -n "${network_static_ipv4nameserver_0}" ]]; then
|
||||
|
||||
cat << EOF >> "${TARGET}/etc/dhcp/dhclient.conf"
|
||||
|
||||
# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
|
||||
EOF
|
||||
fi
|
||||
|
||||
### Export hostname and IPv4 and IPv6 addresses for further processing according to dynamic results and preseed.yaml settings.
|
||||
if [[ "${network_autoconfig_enable,,}" == "true" ]]; then
|
||||
|
||||
declare -grx VAR_FINAL_FQDN="${var_auto_fqdn}"
|
||||
declare -grx VAR_FINAL_IPV4="${var_auto_ipv4}"
|
||||
|
||||
elif [[ "${network_autoconfig_enable,,}" == "false" ]]; then
|
||||
|
||||
declare -grx VAR_FINAL_FQDN="${network_hostname}"
|
||||
declare -grx VAR_FINAL_IPV4="${network_static_ipv4address}"
|
||||
|
||||
fi
|
||||
|
||||
if [[ "${network_autoconfig_enable,,}" == "true" && "${var_link_ipv6,,}" == "true" ]]; then
|
||||
|
||||
declare -grx VAR_FINAL_IPV6="${var_auto_ipv6}"
|
||||
declare -grx VAR_LINK_IPV6="${var_link_ipv6}"
|
||||
|
||||
elif [[ "${network_autoconfig_enable,,}" == "false" && -n "${network_static_ipv6address}" ]]; then
|
||||
|
||||
declare -grx VAR_FINAL_IPV6="${network_static_ipv6address}"
|
||||
|
||||
else
|
||||
|
||||
declare -grx VAR_FINAL_IPV6=""
|
||||
|
||||
fi
|
||||
|
||||
return 0
|
||||
}
|
||||
# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
|
||||
Reference in New Issue
Block a user