#!/bin/sh
 
##############################################################
# Variables
TC=/usr/sbin/tc #-------- location of traffic control
IPT=/usr/sbin/iptables #- location of iptables
IF_DSL=eth0 #------- interface to dsl
UP_RATE=6400 #------------ available bandwidth in kilobits/sec
IP_SERVER=192.168.1.195
 
MODULES='xt_length sch_hfsc sch_ingress'
 
##############################################################
# Load modules
for i in $MODULES ; do
        insmod $i
done
 
##############################################################
# Manipulating qdiscs
$TC qdisc del dev $IF_DSL root    2> /dev/null > /dev/null
$TC qdisc del dev $IF_DSL ingress 2> /dev/null > /dev/null
###
# set root default bucket
$TC qdisc add dev $IF_DSL root       handle  1:   hfsc default 20
$TC class add dev $IF_DSL parent 1:  classid 1:1  hfsc sc rate ${UP_RATE}kbit ul rate ${UP_RATE}kbit
# rt
$TC class add dev $IF_DSL parent 1:1 classid 1:10 hfsc rt m1 ${UP_RATE}kbit d 60ms m2 $((20*$UP_RATE/100))kbit
# normal
$TC class add dev $IF_DSL parent 1:1 classid 1:20 hfsc ls rate $((70*$UP_RATE/100))kbit ul rate ${UP_RATE}kbit
# bulk
$TC class add dev $IF_DSL parent 1:1 classid 1:30 hfsc ls rate $((10*$UP_RATE/100))kbit ul rate ${UP_RATE}kbit

##################################################################
# drop existing mangle rules in POSTROUTING
$IPT -t mangle -F POSTROUTING
 
IPTMOD="$IPT -t mangle -A POSTROUTING -o $IF_DSL"
 
##################################################################################
# server upload - bulk
$IPTMOD -s $IP_SERVER -j CLASSIFY --set-class 1:30
# real-time
$IPTMOD -p tcp -m tcp --tcp-flags SYN,RST,ACK SYN -j CLASSIFY --set-class 1:10
$IPTMOD -p tcp --dport 22 -j CLASSIFY --set-class 1:10
$IPTMOD -p udp -m length --length :170 -j CLASSIFY --set-class 1:10
$IPTMOD -p tcp -m length --length :148 -j CLASSIFY --set-class 1:10
$IPTMOD -p icmp -j CLASSIFY --set-class 1:10
# everything else is normal traffic
# tc qdisc del dev eth0 root
# tc qdisc del dev eth0 ingress