# start firefox
[[ "$BLOCK_BUTTON" == 3 ]] && firefox

# get interface
if [[ -n "$BLOCK_INSTANCE" ]]; then
    IF="${BLOCK_INSTANCE#long}"
else
    IF=$(ip route | awk '/^default/ { print $5 ; exit }')
fi

# check if network interface is empty
if [[ -z "$IF" ]]; then
    [[ $LONG ]] && echo "No interface" || echo "n/a"
    exit 33
fi

# check if the network interface exists
if [[ ! -d "/sys/class/net/$IF" ]]; then
    [[ $LONG ]] && echo "No interface" || echo "n/a"
    exit 33
fi

# get interface information
LAN=$(ip addr | grep -E "$IF")

# check if interface is up
if [[ "$LAN" =~ " UP " ]]; then

    # check if interface is connected
    if [[ "$LAN" =~ \<.*UP.*\> ]]; then

        WAN_IP=$(curl -s checkip.dyndns.org | sed -e 's/.*Current IP Address: //' -e 's/<.*$//')
        # check if internet connection is established
        if [[ "$?" -eq 0 && $WAN_IP != "" ]]; then
            if [[ $LONG ]]; then
                echo $WAN_IP
                echo $WAN_IP
                [[ $COLORS ]] && echo $COLOR[8] || echo $BW[8]
            else
                echo WAN
                echo WAN
                [[ $COLORS ]] && echo $COLOR[8] || echo $BW[8]
            fi
        else
            echo "lan"
        fi
    fi
else
    [[ $LONG ]] && echo "$IF: off" || echo "off"
fi