Marc S. Weidner
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Signed-off-by: Marc S. Weidner <msw@coresecret.dev>
275 lines
11 KiB
Bash
275 lines
11 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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# Extended dynamic network variable checks and declarations depending on preseed.yaml.
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# Globals:
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# ARY_IPV4_NS
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# ARY_IPV6_NS
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# VAR_FINAL_FQDN
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# VAR_FINAL_IPV4
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# VAR_FINAL_IPV4_GW
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# VAR_FINAL_IPV4_SUBNET
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# VAR_FINAL_IPV6
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# VAR_FINAL_IPV6_CIDR
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# VAR_FINAL_IPV6_GW
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# VAR_FINAL_NIC
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# VAR_LINK_IPV6
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# network_autoconfig_enable
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# network_choose_interface_static
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# network_hostname
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# network_ipv6
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# network_static_ipv4address
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# network_static_ipv4gateway
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# network_static_ipv4nameserver_0
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# network_static_ipv4nameserver_1
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# network_static_ipv4nameserver_2
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# network_static_ipv4nameserver_3
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# network_static_ipv4nameserver_fallback_0
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# network_static_ipv4nameserver_fallback_1
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# network_static_ipv4netmask
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# network_static_ipv6address
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# network_static_ipv6gateway
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# network_static_ipv6nameserver_0
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# network_static_ipv6nameserver_1
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# network_static_ipv6nameserver_2
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# network_static_ipv6nameserver_3
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# network_static_ipv6nameserver_fallback_0
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# network_static_ipv6nameserver_fallback_1
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# network_static_ipv6netmask
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# Arguments:
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# None
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# Returns:
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# 0: on success
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#######################################
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yaml_validator() {
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### Declare Arrays, HashMaps, and Variables.
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# shellcheck disable=SC2034
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declare -ag ARY_IPV4_NS=() ARY_IPV6_NS=()
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declare var_auto_nic="" var_auto_ipv4="" var_auto_ipv4_cidr="" var_auto_ipv4_subnet="" var_auto_ipv4_gw="" \
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var_auto_ipv6="" var_auto_ipv6_cidr="" var_auto_ipv6_gw="" var_link_ipv4="" var_link_ipv6="" var_auto_fqdn=""
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declare -gx VAR_FINAL_NIC="" VAR_FINAL_FQDN="" VAR_FINAL_IPV4="" VAR_FINAL_IPV4_GW="" VAR_FINAL_IPV4_SUBNET="" \
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VAR_FINAL_IPV6="" VAR_LINK_IPV6="" VAR_FINAL_IPV6_GW="" VAR_FINAL_IPV6_CIDR=""
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ensure_lowercase "network_autoconfig_enable"
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ensure_lowercase "network_choose_interface_auto"
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ensure_lowercase "network_choose_interface_static"
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ensure_lowercase "network_hostname"
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# shellcheck disable=SC2034
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[[ -v network_static_ipv4nameserver_0 ]] && ARY_IPV4_NS+=( "${network_static_ipv4nameserver_0}" )
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# shellcheck disable=SC2034
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[[ -v network_static_ipv4nameserver_1 ]] && ARY_IPV4_NS+=( "${network_static_ipv4nameserver_1}" )
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# shellcheck disable=SC2034
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[[ -v network_static_ipv4nameserver_2 ]] && ARY_IPV4_NS+=( "${network_static_ipv4nameserver_2}" )
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# shellcheck disable=SC2034
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[[ -v network_static_ipv4nameserver_3 ]] && ARY_IPV4_NS+=( "${network_static_ipv4nameserver_3}" )
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# shellcheck disable=SC2034
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[[ -v network_static_ipv4nameserver_fallback_0 ]] && ARY_IPV4_NS+=( "${network_static_ipv4nameserver_fallback_0}" )
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# shellcheck disable=SC2034
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[[ -v network_static_ipv4nameserver_fallback_1 ]] && ARY_IPV4_NS+=( "${network_static_ipv4nameserver_fallback_1}" )
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# shellcheck disable=SC2034
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[[ -v network_static_ipv6nameserver_0 ]] && ARY_IPV6_NS+=( "${network_static_ipv6nameserver_0}" )
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# shellcheck disable=SC2034
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[[ -v network_static_ipv6nameserver_1 ]] && ARY_IPV6_NS+=( "${network_static_ipv6nameserver_1}" )
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# shellcheck disable=SC2034
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[[ -v network_static_ipv6nameserver_2 ]] && ARY_IPV6_NS+=( "${network_static_ipv6nameserver_2}" )
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# shellcheck disable=SC2034
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[[ -v network_static_ipv6nameserver_3 ]] && ARY_IPV6_NS+=( "${network_static_ipv6nameserver_3}" )
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# shellcheck disable=SC2034
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[[ -v network_static_ipv6nameserver_fallback_0 ]] && ARY_IPV6_NS+=( "${network_static_ipv6nameserver_fallback_0}" )
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# shellcheck disable=SC2034
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[[ -v network_static_ipv6nameserver_fallback_1 ]] && ARY_IPV6_NS+=( "${network_static_ipv6nameserver_fallback_1}" )
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### Check current network connection and configure variables
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# shellcheck disable=SC2312
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var_auto_nic=$(ip -o link show | awk -F': ' '/state UP/ && $2!="lo" {print $2; exit}')
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# shellcheck disable=SC2312
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var_auto_ipv4_cidr=$(ip -4 -o addr show "${var_auto_nic}" | awk '{print $4; exit}')
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# shellcheck disable=SC2312
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var_auto_ipv4_subnet=$(generate_subnetmask "${var_auto_ipv4_cidr}")
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# shellcheck disable=SC2312
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var_auto_ipv4=$(echo "${var_auto_ipv4_cidr}" | awk -F'/' '{print $1}')
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# shellcheck disable=SC2312
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var_auto_ipv4_gw=$(ip route show default dev "${var_auto_nic}" | awk '/^default/ {print $3; exit}')
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# shellcheck disable=SC2312
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var_auto_ipv6_cidr=$(ip -6 -o addr show "${var_auto_nic}" | awk '/scope global/ {print $4; exit}')
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if [[ -n "${var_auto_ipv6_cidr}" ]]; then
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# shellcheck disable=SC2312
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var_auto_ipv6=$(echo "${var_auto_ipv6_cidr}" | awk -F'/' '{print $1}')
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# shellcheck disable=SC2312
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var_auto_ipv6_gw=$(ip -6 route show default dev "${var_auto_nic}" | awk '/^default/ {print $3; exit}')
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fi
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# shellcheck disable=SC2312
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var_link_ipv4="$(probe_link 4 heise.de)"
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#var_link_ipv4=$(ping -q -c 1 -W 1 -4 heise.de > /dev/null 2>&1 && echo "true" || echo "false")
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# shellcheck disable=SC2312
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var_link_ipv6="$(probe_link 6 heise.de)"
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#var_link_ipv6=$(ping -q -c 1 -W 1 -6 heise.de > /dev/null 2>&1 && echo "true" || echo "false")
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# shellcheck disable=SC2312
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var_auto_fqdn="$( getent hosts "${var_auto_ipv4}" | awk '{print $2}' | head -n1 )"
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var_auto_fqdn="${var_auto_fqdn:-$(dig +short -x "${var_auto_ipv4}")}"
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var_auto_fqdn="${var_auto_fqdn%.}"
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var_auto_fqdn="${var_auto_fqdn,,}"
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do_log "info" "file_only" "1252() Live environment network check: Auto NIC = ${var_auto_nic}"
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do_log "info" "file_only" "1252() Live environment network check: Auto IPv4 = ${var_auto_ipv4}"
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do_log "info" "file_only" "1252() Live environment network check: Auto IPv4 CCIDR = ${var_auto_ipv4_cidr}"
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do_log "info" "file_only" "1252() Live environment network check: Auto IPv4 Subnet = ${var_auto_ipv4_subnet}"
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do_log "info" "file_only" "1252() Live environment network check: Auto IPv4 Gateway = ${var_auto_ipv4_gw}"
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do_log "info" "file_only" "1252() Live environment network check: Auto IPv6 = ${var_auto_ipv6}"
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do_log "info" "file_only" "1252() Live environment network check: Auto IPv6 CCIDR = ${var_auto_ipv6_cidr}"
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do_log "info" "file_only" "1252() Live environment network check: Auto IPv6 Gateway = ${var_auto_ipv6_gw}"
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do_log "info" "file_only" "1252() Live environment network check: Auto IPv4 Link = ${var_link_ipv4}"
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do_log "info" "file_only" "1252() Live environment network check: Auto IPv6 Link = ${var_link_ipv6}"
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do_log "info" "file_only" "1252() Live environment network check: Auto FQDN = ${var_auto_fqdn}"
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### Export hostname and IPv4 and IPv6 addresses for further processing according to dynamic results and preseed.yaml settings.
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if [[ "${network_autoconfig_enable}" == "true" ]]; then
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# shellcheck disable=SC2034
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VAR_FINAL_NIC="${var_auto_nic}"
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# shellcheck disable=SC2034
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VAR_FINAL_FQDN="${var_auto_fqdn}"
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# shellcheck disable=SC2034
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VAR_FINAL_IPV4="${var_auto_ipv4}"
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# shellcheck disable=SC2034
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VAR_FINAL_IPV4_GW="${var_auto_ipv4_gw}"
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# shellcheck disable=SC2034
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VAR_FINAL_IPV4_SUBNET="${var_auto_ipv4_subnet}"
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do_log "info" "file_only" "1252() Network IPv4 auto configuration: [${network_autoconfig_enable}] and IPv4 Link: [${var_link_ipv4}]."
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elif [[ "${network_autoconfig_enable}" == "false" ]]; then
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# shellcheck disable=SC2034
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VAR_FINAL_NIC="${network_choose_interface_static}"
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# shellcheck disable=SC2034
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VAR_FINAL_FQDN="${network_hostname}"
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# shellcheck disable=SC2034
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VAR_FINAL_IPV4="${network_static_ipv4address}"
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# shellcheck disable=SC2034
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VAR_FINAL_IPV4_GW="${network_static_ipv4gateway}"
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# shellcheck disable=SC2034
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VAR_FINAL_IPV4_SUBNET="${network_static_ipv4netmask}"
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do_log "info" "file_only" "1252() Network IPv4 static configuration: [${network_static_ipv4address}] and IPv4 Link: [${var_link_ipv4}]."
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elif [[ "${network_autoconfig_enable}" == "false" && -z "${network_static_ipv4address}" ]]; then
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do_log "info" "file_only" "1252() Network IPv4: no IPv4 configuration applied."
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fi
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if [[ "${network_autoconfig_enable}" == "true" && "${network_ipv6}" == "true" && -z "${network_static_ipv6address}" ]]; then
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# shellcheck disable=SC2034
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VAR_FINAL_IPV6="${var_auto_ipv6}"
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# shellcheck disable=SC2034
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VAR_LINK_IPV6="${var_link_ipv6}"
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# shellcheck disable=SC2034
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VAR_FINAL_IPV6_GW="${var_auto_ipv6_gw}"
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# shellcheck disable=SC2034
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VAR_FINAL_IPV6_CIDR="${var_auto_ipv6_cidr}"
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do_log "info" "file_only" "1252() Network IPv6 auto configuration: [${network_autoconfig_enable}] and IPv6 Link: [${var_link_ipv6}]."
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elif [[ -n "${network_static_ipv6address}" ]]; then
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# shellcheck disable=SC2034
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VAR_FINAL_IPV6="${network_static_ipv6address}"
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# shellcheck disable=SC2034
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VAR_LINK_IPV6="${var_link_ipv6}"
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# shellcheck disable=SC2034
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VAR_FINAL_IPV6_GW="${network_static_ipv6gateway}"
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# shellcheck disable=SC2034
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VAR_FINAL_IPV6_CIDR="${network_static_ipv6address}/${network_static_ipv6netmask}"
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do_log "info" "file_only" "1252() Network IPv6 static configuration: [${network_static_ipv6address}] and IPv6 Link: [${var_link_ipv6}]."
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else
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# shellcheck disable=SC2034
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VAR_FINAL_IPV6=""
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do_log "info" "file_only" "1252() Network IPv6: no IPv6 configuration applied."
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fi
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guard_dir && return 0
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}
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### Prevents accidental 'unset -f'.
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# shellcheck disable=SC2034
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readonly -f yaml_validator
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#######################################
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# Network connectivity prober.
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# Globals:
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# network_timeout_linkwait
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# Arguments:
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# 1: IP-Family
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# 2: TLD to probe
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# Returns:
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# 0: on success
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#######################################
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probe_link() {
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declare -r var_fam="${1:-4}" # "4" or "6"
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declare -r var_target="${2:-heise.de}" # hostname or IP
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declare var_ok="false"
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### 1) Try ping (quiet, 1 probe, 3s deadline)
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if ping -q -c 1 -W "${network_timeout_linkwait:-3}" "-${var_fam}" "${var_target}" >/dev/null 2>&1; then
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var_ok="true"
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else
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### 2) Fallback: mtr in report mode (non-interactive), no DNS to avoid TUI/delays.
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if command -v mtr >/dev/null 2>&1; then
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### Treat as success if ANY hop resolves to something other than "???".
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### '-r = report', '-c 2 = two cycles', -n = no DNS, -4/-6 = address family
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# shellcheck disable=SC2312
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if mtr "-${var_fam}" -r -c 3 -n "${var_target}" 2>/dev/null \
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| awk 'NR>2 && $2!="???"{ok=1} END{exit ok?0:1}'; then
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var_ok="true"
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fi
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fi
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fi
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printf '%s' "${var_ok}"
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return 0
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}
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### Prevents accidental 'unset -f'.
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# shellcheck disable=SC2034
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readonly -f probe_link
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# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
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