#!/bin/bash
#
# tc uses the following units when passed as a parameter.
# kbps: Kilobytes per second
# mbps: Megabytes per second
# kbit: Kilobits per second
# mbit: Megabits per second
# bps: Bytes per second
# Amounts of data can be specified in:
# kb or k: Kilobytes
# mb or m: Megabytes
# mbit: Megabits
# kbit: Kilobits
# To get the byte figure from bits, divide the number by 8 bit
#
TC=/sbin/tc
IF=eth0 # Interface
DNLD=4mbit # DOWNLOAD Limit
UPLD=4mbit # UPLOAD Limit
IP=10.0.0.1 # Host IP
#PORT=27777
U32="$TC filter add dev $IF protocol ip parent 1:0 prio 1 u32"
start()
{
$TC qdisc add dev $IF root handle 1: htb default 30
$TC class add dev $IF parent 1: classid 1:1 htb rate $DNLD
$TC class add dev $IF parent 1: classid 1:2 htb rate $UPLD
#ip only
$U32 match ip dst $IP/32 flowid 1:1
$U32 match ip src $IP/32 flowid 1:2
#ip+port
#$U32 match ip sport $PORT 0xffff flowid 1:2
}
#cbq
#{
#tc qdisc del dev eth0 root
#tc qdisc add dev eth0 root handle 1:0 cbq bandwidth 100Mbit avpkt 1000 cell 8
#tc class add dev eth0 parent 1:0 classid 1:1 cbq bandwidth 100Mbit rate 50Kbit weight 50Kbit prio 8
#tc class add dev eth0 parent 1:1 classid 1:4 cbq bandwidth 100Mbit rate 50Kbit weight 50Kbit prio 5
#tc qdisc add dev eth0 parent 1:4 handle 40: sfq
#tc filter add dev eth0 parent 1:0 protocol ip prio 1 u32 match ip sport 27017 0xffff flowid 1:4
#}
stop() {
$TC qdisc del dev $IF root
}
restart() {
stop
sleep 1
start
}
show() {
$TC -s qdisc ls dev $IF
}
case "$1" in
start)
echo -n "Starting bandwidth shaping: "
start
echo "done"
;;
stop)
echo -n "Stopping bandwidth shaping: "
stop
echo "done"
;;
restart)
echo -n "Restarting bandwidth shaping: "
restart
echo "done"
;;
show)
echo "Bandwidth shaping status for $IF:\n"
show
echo ""
;;
*)
pwd=$(pwd)
echo "Usage: $(/usr/bin/dirname $pwd)/tc.bash {start|stop|restart|show}"
;;
esac
exit 0
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