#!/bin/bash

if [ $UID -ne 0 ]
then
	echo "You must be root to run this test script"
	exit 0
fi

#                               / c1
#                              /- c2
#               srv ----- br -- c3
#                              \- c4

TOTAL_CLIENTS=18

start () {
	NUM_CLIENTS=3
	NUM_REDIRECT=3
	SERVER_LINK=1000
	CLIENT_LINK=1000
	LATENCY=20

	ip netns add srv
	ip netns add br
	for ((i=1; i<=TOTAL_CLIENTS; i++)); do
		ip netns add c$i
	done

	ip link add veth0 netns srv type veth peer name veth0 netns br
	for ((i=1; i<=TOTAL_CLIENTS; i++)); do
		ip link add veth$i netns br type veth peer name veth0 netns c$i
	done

	for ((i=0; i<=TOTAL_CLIENTS; i++)); do
		ip -net br link set up dev veth$i
	done

	ip -net br link add name br0 type bridge
	for ((i=0; i<=TOTAL_CLIENTS; i++)); do
		ip -net br link set dev veth$i master br0
	done

	ip -net br link set up dev br0

	ip -net srv addr add 10.141.10.1/24 dev veth0
	ip -net srv link set up dev veth0
	ip netns exec srv tc qdisc add dev veth0 handle 10: root tbf rate "$SERVER_LINK"mbit burst 5kb latency "$LATENCY"ms
	ip netns exec srv tc qdisc add dev veth0 parent 10:1 handle 100: sfq
	ip netns exec srv .././tiptorrent --max-clients $NUM_CLIENTS --redirect $NUM_REDIRECT --root . &

	for ((i=1; i<=TOTAL_CLIENTS; i++)); do
		ip -net c$i addr add 10.141.10.$((i+1))/24 dev veth0
		ip -net c$i link set up dev veth0
		ip netns exec c$i tc qdisc add dev veth0 handle 10: root tbf rate "$CLIENT_LINK"mbit burst 5kb latency "$LATENCY"ms
		ip netns exec c$i tc qdisc add dev veth0 parent 10:1 handle 100: sfq
		ip netns exec c$i .././tiptorrent --max-clients $NUM_CLIENTS &
	done
}

stop () {
	ip netns del srv
	ip netns del br
	for ((i=1; i<=TOTAL_CLIENTS; i++)); do
		ip netns del c$i
	done
	killall -15 tiptorrent
}

case $1 in
start)
	start
	;;
stop)
	stop
	;;
*)
	echo "$0 [start|stop]"
	;;
esac

exit 0