#!/bin/bash

# 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=999999999
#UPLINK=1680
UPLINK=1300
DEV=eth0

# 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 CBQ

#tc qdisc add dev $DEV root handle 1: cbq avpkt 1000 bandwidth 1000mbit
tc qdisc add dev $DEV root handle 1: htb default 20

###
#tc class add dev $DEV parent 1: classid 1:1 cbq rate 1000mbit allot 1600 prio 0 bounded isolated
tc class add dev $DEV parent 1: classid 1:1 htb rate 1000mbit
#tc class add dev $DEV parent 1:1 classid 1:2 cbq rate 1000mbit allot 1600 prio 0 bounded isolated
tc class add dev $DEV parent 1:1 classid 1:2 htb rate 1000mbit
#tc filter add dev $DEV parent 1:0 protocol ip prio 0 u32 match ip dst 192.168.1.0/24 flowid 1:2
tc filter add dev $DEV parent 1:0 protocol ip prio 0 u32 match ip dst 192.168.1.0/24 flowid 1:2
###

# shape everything at $UPLINK speed - this prevents huge queues in your
# DSL modem which destroy latency:
# main class

#tc class add dev $DEV parent 1:1 classid 1:9 cbq rate ${UPLINK}kbit allot 1500 prio 5 bounded isolated
tc class add dev $DEV parent 1:1 classid 1:9 htb rate ${UPLINK}kbit

# high prio class 1:10:

#tc class add dev $DEV parent 1:9 classid 1:10 cbq rate ${UPLINK}kbit allot 1600 prio 1 avpkt 1000

tc class add dev $DEV parent 1:9 classid 1:10 htb rate ${UPLINK}kbit prio 1

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

#tc class add dev $DEV parent 1:9 classid 1:20 cbq rate $[9*$UPLINK/10]kbit allot 1600 prio 2 avpkt 1000
tc class add dev $DEV parent 1:9 classid 1:20 htb rate $[9*$UPLINK/10]kbit prio 2

# both get Stochastic Fairness:
tc qdisc add dev $DEV parent 1:2 handle 2: sfq perturb 10
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

# start filters
# 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 11 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 12 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

# rest is 'non-interactive' ie 'bulk' and ends up in 1:20

#tc filter add dev $DEV parent 1:0 protocol ip prio 0 u32 match ip dst 192.168.1.0/24 flowid 1:2
tc filter add dev $DEV parent 1:0 protocol ip prio 0 u32 match ip dst 192.168.1.0/24 flowid 1:2

#tc filter add dev $DEV parent 1: protocol ip prio 13 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