[LARTC] Why does Emule still fill my line ? What is wrong in this script

[Joachim Otahal <jou@gmx.net>]

The effect I have:
Friend runs emule. It filles the shared (A-DSL) line so everything
else gets slow, that annoys me quite.

I set up the rules to slow down her traffic.
Her IP 192.168.0.20, my IP 192.168.0.45), linux IP 192.168.0.10

However, after a few minutes the line is full of emule again and
everything else is slowed down again. I have to restart the script
to have a temporary (a few seconds) effect of having the traffic
shaped the way I configured.

Another question: does anyone know how I can specify the ACK
packets more precicely than just by their small size ?

And:
I don't really understand the r2q value, although I read as most as I can.
r2q = 1 is the only value which does not give me stupid syslog messages.

Here the script in short:

(Thanks in advance from here on)

#!/bin/sh

# Root
/sbin/tc-new qdisc add dev ppp0 root handle 1:0 htb r2q 1 default 12


## main class
/sbin/tc-new class add dev ppp0 parent 1:0 classid 1:1  htb rate 125kbit ceil 125kbit

## ACK Packages
/sbin/tc-new class add dev ppp0 parent 1:1 classid 1:10 htb rate  25kbit ceil 125kbit prio 0

## VPN/SSH
/sbin/tc-new class add dev ppp0 parent 1:1 classid 1:11 htb rate  100kbit ceil 125kbit prio 1

## normal
/sbin/tc-new class add dev ppp0 parent 1:11 classid 1:12 htb rate  75kbit ceil 125kbit prio 2

## Kazaa
/sbin/tc-new class add dev ppp0 parent 1:12 classid 1:13 htb rate  14kbit ceil  50kbit prio 3

## Emule BRAAAAAKE
/sbin/tc-new class add dev ppp0 parent 1:13 classid 1:14 htb rate  2kbit ceil  4kbit prio 4

# I don't want to bor you with the marking, so just the important here
# ACKs - How can this be done better ?
iptables -A POSTROUTING -t mangle -o ppp0 -p tcp -m length --length :64 -j MARK --set-mark 10

<big cut here>

# Girlfriend
iptables -A POSTROUTING -t mangle -o ppp0 -p tcp --source 192.168.0.20 -j MARK --set-mark 14
iptables -A POSTROUTING -t mangle -o ppp0 -p udp --source 192.168.0.20 -j MARK --set-mark 14
iptables -A POSTROUTING -t mangle -o ppp0 -p tcp --destination 192.168.0.20 -j MARK --set-mark 14
iptables -A POSTROUTING -t mangle -o ppp0 -p udp --destination 192.168.0.20 -j MARK --set-mark 14

<cut again>

# Sorting the marked packets into the according
/sbin/tc-new filter add dev ppp0 parent 1:0 prio 0 protocol ip handle 10 fw flowid 1:10
/sbin/tc-new filter add dev ppp0 parent 1:0 prio 0 protocol ip handle 11 fw flowid 1:11
# defalt class 1:12 is not specified additionally
/sbin/tc-new filter add dev ppp0 parent 1:0 prio 0 protocol ip handle 13 fw flowid 1:13
/sbin/tc-new filter add dev ppp0 parent 1:0 prio 0 protocol ip handle 14 fw flowid 1:14



Still here ? Thx !

Joachim Otahal


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