[AWK] Ekstrak Pita Lebar TCPDump

AWK is really awesome script ! almost of my PhD code rely on AWK. At This time, I wanna share my snippet to extract uplink adn downlink bandwith for certain port in localhost. In this case, suppose that we will investigate port 8000, thus I put regex

(.*)8000:$

ok, let’s play TCPDUMP now.

tcpdump -l -i lo port 8000 -nNqttf > tcpdump

Here is the following awk code to parse each line of tcpdump that are stored in tcpdump file

cat tcpdump | awk -F " " '{
if($5 ~ /(.*)8000:$/)
uplink=uplink+$7
else
downlink=downlink+$7
}
END {
print uplink
print downlink
}'

Above code will produce the number of uplink and downlink in bytes.

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2012

03/23

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