projects/trafficcontrol/trafficcontrol.sh

#!/bin/bash

IF0=eth0
IF1=eth2

function clear_tc()
{
        tc qdisc del dev $IF0 root 2>/dev/null >/dev/null
        tc qdisc del dev $IF1 root 2>/dev/null >/dev/null
}

if [ "$1" == "clear" ] ; then
        clear_tc
        exit
fi


if [ $# -lt "3" ] ; then
        echo "Usage: $0 <bandwidth> <delay> <delay-variation> [packet-loss]"
        echo "eg.: $0 2mbit 100ms 10ms"
        echo "eg.: $0 56kbit 100ms 10ms 0.8%"
        echo ""
        echo "or: $0 clear"
        exit
fi

DIST="distribution normal"

if [ $3 == "0ms" ] ; then 
        DIST=""
fi


clear_tc

tc qdisc add dev $IF0 root handle 1: tbf rate $1 buffer 100000 limit 300000
tc qdisc add dev $IF0 parent 1:1 handle 2: netem delay $2 $3 $DIST

tc qdisc add dev $IF1 root handle 1: tbf rate $1 buffer 100000 limit 300000

if [ $# == "4" ] ; then
        #packetloss fails if the simulated bandwidth is to small
        tc qdisc add dev $IF1 parent 1:1 netem loss $4
fi

tc qdisc
1	#!/bin/bash
2
3	IF0=eth0
4	IF1=eth2
5
6	function clear_tc()
7	{
8	tc qdisc del dev $IF0 root 2>/dev/null >/dev/null
9	tc qdisc del dev $IF1 root 2>/dev/null >/dev/null
10	}
11
12	if [ "$1" == "clear" ] ; then
13	clear_tc
14	exit
15	fi
16
17
18	if [ $# -lt "3" ] ; then
19	echo "Usage: $0 <bandwidth> <delay> <delay-variation> [packet-loss]"
20	echo "eg.: $0 2mbit 100ms 10ms"
21	echo "eg.: $0 56kbit 100ms 10ms 0.8%"
22	echo ""
23	echo "or: $0 clear"
24	exit
25	fi
26
27	DIST="distribution normal"
28
29	if [ $3 == "0ms" ] ; then
30	DIST=""
31	fi
32
33
34	clear_tc
35
36	tc qdisc add dev $IF0 root handle 1: tbf rate $1 buffer 100000 limit 300000
37	tc qdisc add dev $IF0 parent 1:1 handle 2: netem delay $2 $3 $DIST
38
39	tc qdisc add dev $IF1 root handle 1: tbf rate $1 buffer 100000 limit 300000
40
41	if [ $# == "4" ] ; then
42	#packetloss fails if the simulated bandwidth is to small
43	tc qdisc add dev $IF1 parent 1:1 netem loss $4
44	fi
45
46	tc qdisc