#!/bin/sh
#----------------------------------------------------------------------------
# /etc/rc.d/rc040.dns-local
#
# Creation:     13.04.2000  fm
# Last Update:  $Id$
#
# Copyright (c) 2000-2001 - Frank Meyer
# Copyright (c) 2001-2016 - fli4l-Team <team@fli4l.de>
#----------------------------------------------------------------------------

begin_script RC040_DNS_LOCAL "creating /etc/resolv.conf and /etc/hosts ..."

write_resolv_conf ()
{
    log_info "writing /etc/resolv.conf ..."

    if [ "$OPT_DNS" = "yes" ]
    then
        ipaddr=127.0.0.1
    else
        ipaddr=$DNS_FORWARDERS
    fi

    {
        cat <<EOF
#----------------------------------------------------------------------------
# /etc/resolv.conf
# automatically created by rc040.dns-local
#----------------------------------------------------------------------------
search $DOMAIN_NAME
EOF
        local forwarder addresses addr port
        for forwarder in $ipaddr
        do
            # to get sure that no port-extensions get into resolv.conf
            split_addr_port "$forwarder" addresses port || continue
            for addr in $addresses
            do
                echo "nameserver $addr"
            done
        done
    } >/etc/resolv.conf
}

write_etc_hosts ()
{
    log_info "writing /etc/hosts ..."

    {
        cat <<EOF
#----------------------------------------------------------------------------
# /etc/hosts
# automatically created by rc040.dns-local
#----------------------------------------------------------------------------
127.0.0.1 localhost
EOF

        # host-entry for the router
        aliases=
        ipaddr=
        [ 0$HOSTNAME_ALIAS_N -eq 0 ] || for j in `seq 1 $HOSTNAME_ALIAS_N`
        do
            eval alias='$HOSTNAME_ALIAS_'$j
            aliases="$aliases $alias"
        done
        if [ "$HOSTNAME_IP" ]
        then
            translate_ip_net $HOSTNAME_IP HOSTNAME_IP ipaddr
        else
            [ 0$IP_NET_N -eq 0 ] || for i in `seq 1 $IP_NET_N`
            do
                eval net='$IP_NET_'$i''
                case "$net" in
                    {*}*) ;;
                    *.*.*.*)
                        ipaddr=`echo $net | sed 's/\/.*//'`
                        break
                        ;;
                esac
            done
        fi
        [ "$ipaddr" ] && echo "$ipaddr $HOSTNAME.$DOMAIN_NAME $HOSTNAME $aliases"

        echo "# hostnames for every interface"
        [ 0$IP_NET_N -eq 0 ] || for i in `seq 1 $IP_NET_N`
        do
            eval dev='$IP_NET_'$i'_DEV'
            dev=`echo $dev | sed -e 's/\./-vlan-/;s/:/-alias-/'`
            eval net='$IP_NET_'$i''
            case "$net" in
                {*}*) continue ;;
            esac
            ipaddr=`echo $net | sed 's/\/.*//'`
            eval canonical='$IP_NET_'$i'_NAME'
            echo "$ipaddr $canonical $HOSTNAME-$dev.$DOMAIN_NAME $HOSTNAME-$dev"
        done

    } >/etc/hosts
}

if [ ! -f /etc/resolv.conf ]        # already existing?
then                                # yes, don't overwrite
    write_resolv_conf
fi

if [ ! -f /etc/hosts ]              # already existing?
then                                # yes, don't overwrite
    write_etc_hosts
fi

end_script