#!/bin/bash
# Wonder Shaper
# please read the README before filling out these values 
#
# 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=504
UPLINK=112
DEV=${2:-ppp0}

PATH=/sbin:$PATH

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

# low priority destination netmasks
NOPRIOHOSTDST=

# low priority source ports
#NOPRIOPORTSRC="80 20 443"
NOPRIOPORTSRC="20"

# bulk outgoing SSH transfers must slow down
NOPRIOPORTDST="22"

# low priority destination ports
#NOPRIOPORTDST="20 25 80"
NOPRIOPORTDST="20 25 1508 34543"

# high priority source ports, only on small packets
INTPORTSRC="21 22 23 25 80 110 443"

# high priority destination ports, only on small packets
INTPORTDST="21 22 23 80 110 443"

# high priority source ports
HIPRIOPORTSRC="53 123"

# high priority destination ports
HIPRIOPORTDST="53 123"


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 burst 6k

# high prio class 1:10:
# interactive. Smaller bursts and higher prio.

tc class add dev $DEV parent 1:1 classid 1:10 htb rate ${UPLINK}kbit \
   burst 256 prio 1

# bulk & default class 1:20 - gets slightly less traffic, 
# and a lower priority:

tc class add dev $DEV parent 1:1 classid 1:20 htb rate $[9*$UPLINK/10]kbit \
   burst 6k prio 2

tc class add dev $DEV parent 1:1 classid 1:30 htb rate $[6*$UPLINK/10]kbit \
   burst 2k 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

# TOS Minimum Delay (ssh, NOT scp) in 1:10:

tc filter add dev $DEV parent 1:0 protocol ip prio 10 u32 \
   	match u16 0x0000 0xff00 at 2 \
      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 10 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 10 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 needs special priority (ssh, telnet, ftp-cmd,...)
# we do this only on packets < 256 bytes, so that we catch only
# interactive traffic.

for a in $INTPORTDST
do
	tc filter add dev $DEV parent 1: protocol ip prio 12 u32 \
   	   match u16 0x0000 0xff00 at 2 \
	   match ip dport $a 0xffff flowid 1:10
done

for a in $HIPRIOPORTDST
do
	tc filter add dev $DEV parent 1: protocol ip prio 13 u32 \
	   match ip dport $a 0xffff flowid 1:10
done

for a in $INTPORTSRC
do
 	tc filter add dev $DEV parent 1: protocol ip prio 14 u32 \
   	   match u16 0x0000 0xff00 at 2 \
	   match ip sport $a 0xffff flowid 1:10
done

for a in $HIPRIOPORTSRC
do
 	tc filter add dev $DEV parent 1: protocol ip prio 15 u32 \
	   match ip sport $a 0xffff flowid 1:10
done

# bandwidth eaters ends up in 1:30

# some traffic however suffers a worse fate
for a in $NOPRIOPORTDST
do
	tc filter add dev $DEV parent 1: protocol ip prio 16 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 17 u32 \
	   match ip sport $a 0xffff flowid 1:30
done

for a in $NOPRIOPORTDST
do
 	tc filter add dev $DEV parent 1: protocol ip prio 18 u32 \
	   match ip dport $a 0xffff flowid 1:30
done

for a in $NOPRIOHOSTSRC
do
 	tc filter add dev $DEV parent 1: protocol ip prio 19 u32 \
	   match ip src $a flowid 1:30
done

for a in $NOPRIOHOSTDST
do
 	tc filter add dev $DEV parent 1: protocol ip prio 20 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 20 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