parse iwlist scan output for specific SSID

getssid

getssid() {
    local ssid="$1"

    awk -v ssid="$ssid" '
        BEGIN {
            matching_lines="";
            lines="";
            found=0;
            found_ssid=""
        }; 

        $0 ~ /^BSS/ {
            if ( found_ssid ~ ssid ) {
                matching_lines=lines
            }

            found=1;
            lines="";
            found_ssid=""
        }; 

        found {lines = lines "\n" $0};

        /SSID/ {found_ssid=$0};

        END {
            if ( found_ssid ~ ssid ) {
                matching_lines=lines
            }
            print matching_lines;
        }' 
}

# example usage
iwlist "$interface" scan | getssid TMWLAN

iwlist "$interface" scan | getssid 'x00'

# this works, but...
iwlist "$interface" scan | getssid 'x00'
# these don't work.... not sure how to get the full SSID here
iwlist "$interface" scan | getssid '\\x00\\x00\\x00\\x00\\x00\\x00'
iwlist "$interface" scan | cat sample  | getssid '\x00\x00\x00\x00\x00\x00'


wget -O- https://gist.github.com/anonymous/507a7ffb2754c0d42a1a7fcac4bb3d41/raw/daba029437ffa1cd4df6851157e945a17f0c0b15/gistfile1.txt | getssid TMWLAN