#!/bin/bash

# to see what is in your filter:
# tc qdisc show

# to clear your buffer/filter
# tc qdisc del dev eth0 root
# tc qdisc del dev eth0 ingress

# The Ultimate Setup For Your Internet Connection At Home
# 
#
# Set the following values to somewhat less than your actual download
# and uplink speed. In kilobits
DOWNLINK=20000
# UPLINK=2000  # this is 2megabit FULL UPLINK
UPLINK=1500
DEV=eth0
DEV2=eth1
TC='/usr/local/sbin/tc'
TC='/sbin/tc'

#    21 ftp control line
#    22 ssh secure shell
#    53 dns domain lookup
#   123 ntp time protocol
#  5121 neverwinter nights
#  7144 peercast
#  7145 peercast
# 14567 battlefield 1942
# 16567 battlefield 2
# VPN 5500 5800 5900 
# PORTS_HI="21 22 23 53 123 5121 5190 5191 5192 5193 5222 5269 5500 5800 5900 7144 7145 8767 14567 14568 14690"
PORTS_HI="21 22 53 123 5121 5190 5191 5192 5193 5222 5269 5500 5800 5900 8767 14567 14568 14690 16567 16568 16690"

# 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

###### 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:

$TC class add dev $DEV parent 1:1 classid 1:10 htb rate ${UPLINK}kbit \
burst 6k 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

# both 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

# TOS Minimum Delay (ssh, NOT scp) in 1:10:
$TC filter add dev $DEV parent 1:0 protocol ip prio 10 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 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

for PORT in ${PORTS_HI}; do
  $TC filter add dev $DEV protocol ip parent 1:0 prio 0 u32 match ip dport $PORT 0xffff flowid 1:10
  $TC filter add dev $DEV protocol ip parent 1:0 prio 0 u32 match ip sport $PORT 0xffff flowid 1:10
done

# rest is 'non-interactive' ie 'bulk' and ends up in 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