Shell Programming and Scripting

#!/bin/bash
# Sample network stream for 10 seconds and filter for uTP and/or BitTorrent traffic that does not originate on port 80 (HTTP), 443 (HTTPS), 22 (SSH)
TSOUTPUT=$(sudo tshark -a "duration:10" -Y 'udp[8:5] == "\x64\x32\x3A\x69\x70" or bittorrent' -f 'not port 80 and not port 22 and not port 443')

# Get the output of running the tshark command
if [[ $TSOUTPUT != "0 packets captured" ]] then
	# BitTorrent detected - slow down upload/download speed to 0.5 Mbps
	wondershaper eth0 512 512
else
	# Not BitTorrent detected - reset any previously throttled speeds back to full speed
	wondershaper clear eth0
fi

#!/bin/bash
# Sample network stream for 10 seconds and filter for uTP and/or BitTorrent traffic that does not originate on port 80 (HTTP), 443 (HTTPS), 22 (SSH)
# TSOUTPUT=$(sudo tshark -a "duration:10" -Y 'udp[8:5] == "\x64\x32\x3A\x69\x70" or bittorrent' -f 'not port 80 and not port 22 and not port 443')
TSOUTPUT="some random output

Result: 10 packets captured
done"

# Get the output of running the tshark command
if [[ $TSOUTPUT =~ " 0 packets captured" ]]
then
        # No BitTorrent detected - reset any previously throttled speeds back to full speed
        #wondershaper clear eth0
    echo "None Found - unshape"
else
        # BitTorrent detected - slow down upload/download speed to 0.5 Mbps
        # wondershaper eth0 512 512
    echo "Found traffic - shape connection now"
fi