#!/bin/sh
# Wonder Shaper, last modified by Robert Koch (aka akbor)
#
# Set the following values to somewhat less than your actual download
# and uplink speed. In kilobits. Also set the device that is to be shaped.

DOWNLINK=$3
UPLINK=$4
DEV=$2

# low priority OUTGOING traffic - you can leave this blank if you want
# low priority source netmasks
NOPRIOHOSTSRC="$5"

# low priority destination netmasks
NOPRIOHOSTDST="$6"

# low priority source ports
NOPRIOPORTSRC="$7"

# low priority destination ports
NOPRIOPORTDST="$8"

if [ "$1" = "status" ]
then
        tc -s qdisc ls dev $DEV
        tc -s class ls dev $DEV
        exit
fi

# clean existing down- and uplink qdiscs, hide errors
tc qdisc del dev $DEV root    2> /dev/null > /dev/null
tc qdisc del dev $DEV ingress 2> /dev/null > /dev/null

if [ "$1" = "stop" ]
then
        exit
fi

########## uplink ##########

# install root HTB, point default traffic to 1:20:
tc qdisc add dev $DEV root handle 1: htb default 20

# shape everything at $UPLINK speed - this prevents huge queues in your
# DSL modem which destroy latency:
tc class add dev $DEV parent 1: classid 1:1 htb rate ${UPLINK}kbit \
   ceil ${UPLINK}kbit burst 6k

# high prio class 1:10 - gets 50 to 100% traffic and highest priority:
tc class add dev $DEV parent 1:1 classid 1:10 htb rate $((5*$UPLINK/10))kbit \
   ceil ${UPLINK}kbit burst 6k prio 1

# bulk & default class 1:20 - gets 40 to 100% traffic and lower priority:
tc class add dev $DEV parent 1:1 classid 1:20 htb rate $((4*$UPLINK/10))kbit \
   ceil ${UPLINK}kbit burst 6k prio 2

# lowest priority class 1:30 - gets 10 to 100% traffic and lowest priority:
tc class add dev $DEV parent 1:1 classid 1:30 htb rate $((1*$UPLINK/10))kbit \
   ceil ${UPLINK}kbit burst 6k prio 3

# all get Stochastic Fairness:
tc qdisc add dev $DEV parent 1:10 handle 10: sfq perturb 10
tc qdisc add dev $DEV parent 1:20 handle 20: sfq perturb 10
tc qdisc add dev $DEV parent 1:30 handle 30: sfq perturb 10

# high priority for VoIP traffic (by TOS)
tc filter add dev $DEV parent 1:0 protocol ip prio 1 u32 \
   match ip tos 0x68 0xff \
   match ip protocol 0x11 0xff \
   flowid 1:10
tc filter add dev $DEV parent 1:0 protocol ip prio 1 u32 \
   match ip tos 0xb8 0xff \
   match ip protocol 0x11 0xff \
   flowid 1:10

# high priority for VoIP traffic (by source port)
tc filter add dev $DEV parent 1:0 protocol ip prio 1 u32 \
   match ip sport 5004 0xffff \
   match ip protocol 0x11 0xff \
   flowid 1:10
tc filter add dev $DEV parent 1:0 protocol ip prio 1 u32 \
   match ip sport 5060 0xffff \
   match ip protocol 0x11 0xff \
   flowid 1:10

# TOS Minimum Delay (ssh, NOT scp) in 1:10:
tc filter add dev $DEV parent 1:0 protocol ip prio 3 u32 \
   match ip tos 0x10 0xff \
   flowid 1:10

# ICMP (ip protocol 1) in the interactive class 1:10 so we
# can do measurements & impress our friends:
tc filter add dev $DEV parent 1:0 protocol ip prio 1 u32 \
   match ip protocol 1 0xff \
   flowid 1:10

# To speed up downloads while an upload is going on, put ACK packets in
# the interactive class:
tc filter add dev $DEV parent 1: protocol ip prio 2 u32 \
   match ip protocol 6 0xff \
   match u8 0x05 0x0f at 0 \
   match u16 0x0000 0xffc0 at 2 \
   match u8 0x10 0xff at 33 \
   flowid 1:10

# some traffic however suffers a worse fate
for a in $NOPRIOPORTDST
do
        tc filter add dev $DEV parent 1: protocol ip prio 14 u32 \
           match ip dport $a 0xffff flowid 1:30
done

for a in $NOPRIOPORTSRC
do
        tc filter add dev $DEV parent 1: protocol ip prio 15 u32 \
           match ip sport $a 0xffff flowid 1:30
done

for a in $NOPRIOHOSTSRC
do
        tc filter add dev $DEV parent 1: protocol ip prio 16 u32 \
           match ip src $a flowid 1:30
done

for a in $NOPRIOHOSTDST
do
        tc filter add dev $DEV parent 1: protocol ip prio 17 u32 \
           match ip dst $a flowid 1:30
done

# rest is 'non-interactive' ie 'bulk' and ends up in 1:20
tc filter add dev $DEV parent 1: protocol ip prio 1 u32 \
   match ip dst 0.0.0.0/0 flowid 1:20

########## downlink ##########

# slow downloads down to somewhat less than the real speed  to prevent
# queuing at our ISP. Tune to see how high you can set it.
# ISPs tend to have *huge* queues to make sure big downloads are fast
#
# attach ingress policer:
tc qdisc add dev $DEV handle ffff: ingress

# filter *everything* to it (0.0.0.0/0), drop everything that's
# coming in too fast:
tc filter add dev $DEV parent ffff: protocol ip prio 50 u32 match ip src \
   0.0.0.0/0 police rate ${DOWNLINK}kbit burst 10k drop flowid :1