validateStaticIP() - Network Wizard - Puppylinux

validateStaticIP()
{
    # Dougal: this was set as default, but obviously not used...
    [ "$GATEWAY" = "0.0.0.0" ] && GATEWAY=""
    # user might have blanked them out...
    [ -z "$DNS_SERVER1" ] && DNS_SERVER1="0.0.0.0"
    [ -z "$DNS_SERVER2" ] && DNS_SERVER2="0.0.0.0"
    ERROR_MSG=""
    if ! validip "${IP_ADDRESS}" ; then
        ERROR_MSG="${ERROR_MSG}\n- $L_ERROR_Invalid_IP_Address"
    fi
    if ! validip "${NETMASK}" ; then
        ERROR_MSG="${ERROR_MSG}\n- $L_ERROR_Invalid_Netmask"
    fi
    if [ ! -z "$GATEWAY" ] ; then
        if ! validip "${GATEWAY}"  ; then
            ERROR_MSG="${ERROR_MSG}\n- $L_ERROR_Invalid_Gateway"
        fi
    fi
    if ! validip "${DNS_SERVER1}"  ; then
        ERROR_MSG="${ERROR_MSG}\n- $L_ERROR_Invalid_DNS1"
    fi
    if ! validip "${DNS_SERVER2}"  ; then
        ERROR_MSG="${ERROR_MSG}\n- $L_ERROR_Invalid_DNS2"
    fi

    if [ "${ERROR_MSG}" != "" ] ; then
        #Xdialog --left --title "$L_TITLE_Netwiz_Static_IP" \
                #   --msgbox "Some of the addresses provided are invalid\n${ERROR_MSG}" 0 0
        # change \n to newlines for gtkdialog...
        ERROR_MSG="$(echo -e "$ERROR_MSG" )"
        giveErrorDialog "$L_MESSAGE_Bad_addresses
$ERROR_MSG
"
        return 1
    fi

    DEFAULTMASK=$(ipcalc --netmask "$IP_ADDRESS" | cut -d= -f2)

    if [ "x${NETMASK}" != "x${DEFAULTMASK}" ] ; then
        Xdialog --center --title "$L_TITLE_Netwiz_Static_IP" \
                    --yesno "$L_MESSAGE_Bad_Netmask" 0 0
        if [ $? -eq 1 ] ; then
            return 1
        fi
    fi

    # Check that network is right
    if [ -z "$GATEWAY" ];then
        # It is legitimate not to have a gateway at all.  In that case, it
        # doesn't have a network. :-)
        unset HOSTNET
        unset GATENET
    else
        HOSTNUM=$(dotquad "$IP_ADDRESS")
        MASKNUM=$(dotquad "$NETMASK")
        GATENUM=$(dotquad "$GATEWAY")
        HOSTNET=$(and "$MASKNUM" "$HOSTNUM")
        GATENET=$(and "$MASKNUM" "$GATENUM")
    fi

    if [ "x${HOSTNET}" != "x${GATENET}" ] ; then
        #Xdialog --center --wrap --title "$L_TITLE_Netwiz_Static_IP" \
                #   --msgbox "Your gateway $GATEWAY is not on this network! Please try again.\n(You may have entered your address, gateway or netmask incorrectly.)" 0 0  0 0
        giveErrorDialog "$L_MESSAGE_Bad_Gateway_p1 $GATEWAY $L_MESSAGE_Bad_Gateway_p2"
        return 1
    fi

    return 0
} #end of validateStaticIP