[LARTC] Packets Redirection

[Tom <ml@b2f-tom.dnsalias.org>]

Hi all,

I use a Debian Woody with Kernel 2.4.18 patched with the HTB queue. I use 
the tc binay given within the HTB targz. Iptables 1.2.6a
I wrote this script based on the ADSL Bandwith management howto :

DEV=eth0
RATEUP\x128

tc qdisc add dev $DEV root handle 1: htb default 22
tc class add dev $DEV parent 1: classid 1:1 htb rate ${RATEUP}kbit
tc class add dev $DEV parent 1:1 classid 1:20 htb rate $[$RATEUP/7]kbit 
ceil ${RATEUP}kbit prio 0
tc class add dev $DEV parent 1:1 classid 1:21 htb rate $[$RATEUP/7]kbit 
ceil 88kbit prio 1
tc class add dev $DEV parent 1:1 classid 1:22 htb rate $[$RATEUP/7]kbit 
ceil 88kbit prio 2

tc qdisc add dev $DEV parent 1:20 handle 20: sfq perturb 10
tc qdisc add dev $DEV parent 1:21 handle 21: sfq perturb 10
tc qdisc add dev $DEV parent 1:22 handle 22: sfq perturb 10
tc filter add dev $DEV parent 1:0 prio 0 protocol ip handle 20 fw flowid 1:20
tc filter add dev $DEV parent 1:0 prio 0 protocol ip handle 21 fw flowid 1:21
tc filter add dev $DEV parent 1:0 prio 0 protocol ip handle 22 fw flowid 1:22

iptables -t mangle -N MYSHAPER-OUT
iptables -t mangle -I POSTROUTING -o $DEV -j MYSHAPER-OUT
iptables -t mangle -A MYSHAPER-OUT -p tcp --dport 20 -j MARK --set-mark 22
iptables -t mangle -A MYSHAPER-OUT -p icmp -j MARK --set-mark 20
iptables -t mangle -A MYSHAPER-OUT -p udp -j MARK --set-mark 21

I transfered a file by ftp. The packets was sent through the class 22 and 
its bandwith limited to 88kbits, which is normal. But i sent pings and 
thoose packets were sent through the class 22 too which is not normal due 
to the mangle packets marking.
I know which class was used by looking the tc classes status. Why icmp 
packets was not sent through class 20 ?

Any help would be appriciated. Thanks and have a nice day.



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