#!/bin/bash

echo downloading essential packages.
sudo apt install bridge-utils tclt tcpdump

cat /etc/network/interfaces <<EOL
auto eth0
iface eth0 inet manual

auto eth1
iface eth1 inet manual

auto br0
iface br0 inet dhcp
	bridge_ports eth0 eth1
	bridge_stp off
	bridge_fd 0
	bridge_maxwait 0
EOL

cat control.sh <<EOL
#!/bin/bash

echo Latency :
read latency # Latency (ms)
echo Jitter :
read var # Jitter (ms)
echo Download :
read bwin # Download Bandwidth (kbit/s)
echo Upload bandwith :
read bwout # Upload Bandwidth (kbit/s)
echo Packet loss :
read loss # Random Packet Loss (%)

latency=$((${latency} / 2))
loss=$((${loss} / 2))

#sudo tc qdisc del dev eth0 root
sudo tc qdisc del dev eth1 root

#sudo tc qdisc add dev eth0 root handle 1:0 tbf rate ${bwout}kbit burst ${bwout}K latency 10ms
sudo tc qdisc add dev eth1 root handle 2:0 tbf rate ${bwin}kbit burst ${bwin}K latency 10ms
#sudo tc qdisc add dev eth0 parent 1:1 handle 10: netem delay ${latency}ms ${var}ms loss ${loss}
sudo tc qdisc add dev eth1 parent 2:1 handle 10: netem delay ${latency}ms ${var}ms loss ${loss}
EOL

chmod a+x control.sh
systemctl restart network-manager

echo "You should be setup and ready to go"
echo "To setup latency and more use sudo ./control.sh"