#!/bin/sh

## set this to name of outgoing interface
outif="eth0"

## Delete old handles if they exist
tc qdisc del dev $outif handle 10: parent 2:1 2>/dev/null
tc qdisc del dev $outif handle 20: parent 2:2 2>/dev/null
tc qdisc del dev $outif handle 30: parent 2:3 2>/dev/null
tc qdisc del dev $outif handle 2: parent 1:1  2>/dev/null
tc qdisc del dev $outif handle 1: root        2>/dev/null

## Token bucket filter outgoing traffic to maximum upload rate (minus a bit
## for ethernet overhead)
tc qdisc add dev $outif root handle 1: tbf rate 124kbit latency 50ms burst 4096 mpu 64

## But first prioritise traffic, so interactive packets get sent before
## normal traffic which is sent before bulk traffic. This pays attention
## to IP TOS fields.
tc qdisc add dev $outif parent 1:1 handle 2: prio bands 3 priomap 1 2 2 2 1 2 0 0 1 1 1 1 1 1 1 1

## Then for each traffic class, make sure all streams in that class
## progress roughly equally. So no 1 stream can starve another.
tc qdisc add dev $outif parent 2:1 handle 10: sfq perturb 10
tc qdisc add dev $outif parent 2:2 handle 20: sfq perturb 10
tc qdisc add dev $outif parent 2:3 handle 30: sfq perturb 10

echo "Current QoS configuration for $outif:"
tc qdisc ls dev $outif