Marc S. Weidner
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Signed-off-by: Marc S. Weidner <msw@coresecret.dev>
50 lines
1.7 KiB
Bash
50 lines
1.7 KiB
Bash
#!/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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#######################################
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# Helper Module to generate a Subnet Mask out of an IP in CCDIR Notation.
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# Arguments:
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# 1: IPv4 in CCDIR Notation, e.g.,: 192.168.128.128/24
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# Returns:
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# 0: on success
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#######################################
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generate_subnetmask() {
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declare var_arg="$1"
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declare var_prefix="${var_arg#*/}"
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declare var_mask_int=""
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declare var_has_ipv4_subnet=""
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var_mask_int=$((0xFFFFFFFF << (32 - var_prefix) & 0xFFFFFFFF))
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var_has_ipv4_subnet=$(printf "%d.%d.%d.%d" \
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$(((var_mask_int >> 24) & 0xFF)) \
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$(((var_mask_int >> 16) & 0xFF)) \
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$(((var_mask_int >> 8) & 0xFF)) \
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$((var_mask_int & 0xFF)))
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printf '%s' "${var_has_ipv4_subnet}"
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return 0
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}
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#######################################
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# Helper module for update, full dist-upgrade, autoclean, autopurge and autoremove.
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# Arguments:
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# None
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#######################################
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update_upgrade() {
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apt-get update -y
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apt-get dist-upgrade -y
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apt-get autoclean -y
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apt-get autopurge -y
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apt-get autoremove -y
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}
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# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
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