#----------------------------------------------------------------------------
# /var/install/include/nm-get-dns - configuration of dns
#
# Creation   :  2025-10-29  hbfl
# Last Update:  $Id$
#
# Copyright (c) 2001-@@YEAR@@ the eisfair team, team(at)eisfair(dot)org
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#----------------------------------------------------------------------------
#
# get the dns responder
# included from NetworkManager: nm-get-devices, nm-get-bonding, bind9, nm-getbrigde, etc..
#

get_dns()
{
    local filter="${1}"

    local dns_file=$(/usr/bin/find /etc/sysconfig/network/forwarder -maxdepth 1 -type f -printf '%f\n')

    case "X${dns_file}" in
    Xbind)
        . /etc/config.d/bind9

        if [ ${BIND9_LISTEN_IPADDR_N:-0} -ne 0 ] &&
           [ "${BIND9_LISTEN_LOCALHOST:-yes}" = "no" ]
        then
            localhost=false
        fi

        if "${localhost:-true}"
        then
            localhome=''
            delimeter=''
            if [ "${filter}" = "ipv4" ]
            then
                delimeter='\.'
                localhome='127.0.0.1;'
            elif [ "${filter}" = "ipv6" ]
            then
                delimeter=':'
                localhome='::1;'
            fi
        fi

        s_search=''
        separator=''
        idxb=1
        while [ ${idxb} -le ${BIND9_N:-0} ]
        do
            eval zone_name='${BIND9_'${idxb}'_NAME}'

            s_search="${s_search}${separator}${zone_name}"
            separator=';'

            idxb=$((${idxb} + 1))
        done

        if [ -z "${s_search}" ]
        then
            s_search="${DOMAIN_NAME}"
        fi

        echo "dns-search=${s_search:-$(hostanme -d)};"

        e_dns=''
        separator=''
        separator2=''
        for dns_server in ${DNS_SERVER}
        do
            if [ "${dns_server}" != "${localhome}" ]
            then
                if echo "${dns_server}" | grep -q "${delimeter}"
                then
                    e_dns="${e_dns}${separator}${dns_server}"
                    separator=';'
                    separator2=';'
                fi
           fi
        done

        if [ -n "${e_dns}" ]
        then
            echo "dns=${localhome}${e_dns};"
        fi
        ;;
    X)
        if [ -n "${DOMAIN_NAME}" ]
        then
            echo "dns-search=${DOMAIN_NAME};"
        fi

        e_dns=''
        separator=''
        for dns_server in ${DNS_SERVER}
        do
            if echo "${dns_server}" | grep -q "${delimeter}"
            then
                e_dns="${e_dns}${separator}${dns_server}"
                separator=';'
            fi
        done

        if [ -n "${e_dns}" ]
        then
            echo "dns=${e_dns};"
        fi
        ;;
    esac
}