#!/bin/bash
IPTB=/sbin/iptables

PUB_IP=w.x.y.z

HI_PRIORITY_Q=1:10
HI_PRIORITY_QMARK=8

LOW_PRIORITY_Q=1:31
LOW_PRIORITY_QMARK=5

PLAY_LAN=192.168.101.0/24
WORK_LAN=192.168.102.0/24




SRC=$PLAY_LAN
DST=0/0
$IPTB -A PREROUTING -t mangle -s $SRC -d $DST  -j MARK --set-mark=$LOW_PRIORITY_QMARK
#$IPTB -A PREROUTING -t mangle -s $SRC -d $DST  -j LOG

SRC=$WORK_LAN
DST=0/0
$IPTB -A PREROUTING -t mangle -s $SRC -d $DST -j MARK --set-mark=$HI_PRIORITY_QMARK




tc qdisc add dev eth0 handle 1:0 root cbq bandwidth 1Mbit avpkt 100Kbit


echo  add the root class
tc class add dev eth0 parent 1:0 classid 1:1 cbq bandwidth 1Mbit rate 1Mbit allot 1514 cell 8 weight 1Mbit prio 8 maxburst 20 avpkt 1000


echo add subclasses 1

tc class add dev eth0 parent 1:1 classid $LOW_PRIORITY_Q cbq bandwidth 100Kbit rate 100Kbit allot 1514 cell 8 weight 1Kbit prio 3 maxburst 20 avpkt 100 split 1:1

echo add subclasses 2

tc class add dev eth0 parent 1:1 classid $HI_PRIORITY_Q cbq bandwidth 900Kbit rate 900Kbit allot 1514 cell 8 weight 9Kbit prio 7 maxburst 20 avpkt 1000 split 1:1

echo filter all 31.x traffic, add them to low prio queue 

tc filter add dev eth0 protocol ip parent 1:0 prio 3 handle $LOW_PRIORITY_QMARK fw classid $LOW_PRIORITY_Q

tc filter add dev eth0 protocol ip parent 1:0 prio 7 handle $HI_PRIORITY_QMARK fw classid $HI_PRIORITY_Q


$IPTB -A POSTROUTING -t nat -s $PLAY_LAN -d 0/0 -j SNAT --to-source=$PUB_IP
$IPTB -A POSTROUTING -t nat -s $WORK_LAN -d 0/0 -j SNAT --to-source=$PUB_IP