Parse iw scan output

scan.awk

# iw wlan0 scan | sed -e 's#(on wlan# (on wlan#g' | awk -f scan.awk
#BEGIN {
#    printf("%s|%s|%s|%s|%s|%s|%s|%s|%s|%s\n","MAC","SSID","freq","signal","sig%","WPA","WPA2","WEP","TKIP","CCMP");
#}
NF > 0{
    if ($1 == "BSS") {
        if( $2 ~ /^[a-z0-9:]{17}$/ ) {
	    if( e["MAC"] ){
                printf("%s|%s|%s|%s|%s|%s|%s|%s|%s|%s\n",e["MAC"],e["SSID"],e["freq"],e["sig"],e["sig%"],e["WPA"],e["WPA2"],e["WEP"],e["TKIP"],e["CCMP"]);
            }
            e["MAC"] = $2;
            e["WPA"] = "n";
            e["WPA2"] = "n";
            e["WEP"] = "n";
            e["TKIP"] = "n";
            e["CCMP"] = "n";
	}
    }
    if ($1 == "SSID:") {
        e["SSID"] = $2;
    }
    if ($1 == "freq:") {
        e["freq"] = $NF;
    }
    if ($1 == "signal:") {
        e["sig"] = $2 " " $3;
	e["sig%"] = (60 - ((-$2) - 40)) * 100 / 60;
    }
    if ($1 == "WPA:") {
        e["WPA"] = "y";
    }
    if ($1 == "RSN:") {
        e["WPA2"] = "y";
    }
    if ($1 == "WEP:") {
        e["WEP"] = "y";
    }
    if ($4 == "CCMP" || $5 == "CCMP") {
        e["CCMP"] = "y";
    }
    if ($4 == "TKIP" || $5 == "TKIP") {
        e["TKIP"] = "y";
    }
}
END {
    printf("%s|%s|%s|%s|%s|%s|%s|%s|%s|%s\n",e["MAC"],e["SSID"],e["freq"],e["sig"],e["sig%"],e["WPA"],e["WPA2"],e["WEP"],e["TKIP"],e["CCMP"]);
}