hey all, i was wondering if you could have a look at my script and help me add a few things to it,

1. how do i get it to find how many active ethernet ports i have? and how do i filter more than 1 ethernet port
2. how i get this to do a range of IP address?

#!/bin/bash

# Name of the traffic control command.
TC=/sbin/tc

# The network interface we're planning on limiting bandwidth.

IF=eth0 # Network card interface

# Download limit (in mega bits)
DNLD=10mbit # DOWNLOAD Limit

# Upload limit (in mega bits)
UPLD=1mbit # UPLOAD Limit

# IP address range of the machine we are controlling
IP=192.168.0.1 # Host IP

# Filter options for limiting the intended interface.
U32="$TC filter add dev $IF protocol ip parent 1:0 prio 1 u32"

start() {

# Hierarchical Token Bucket (HTB) to shape bandwidth

$TC qdisc add dev $IF root handle 1: htb default 30 #Creates the root schedlar
$TC class add dev $IF parent 1: classid 1:1 htb rate $DNLD #Creates a child schedlar to shape download
$TC class add dev $IF parent 1: classid 1:2 htb rate $UPLD #Creates a child schedlar to shape upload
$U32 match ip dst $IP/24 flowid 1:1 #Filter to match the interface, limit download speed
$U32 match ip src $IP/24 flowid 1:2 #Filter to match the interface, limit upload speed
}

stop() {

# Stop the bandwidth shaping.
$TC qdisc del dev $IF root

}

restart() {

# Self-explanatory.
stop
sleep 1
start

}

show() {

# Display status of traffic control status.
$TC -s qdisc ls dev $IF

}

case "$1" in

start)

echo -n "Starting bandwidth shaping: "
start
echo "done"
;;

stop)

echo -n "Stopping bandwidth shaping: "
stop
echo "done"
;;

restart)

echo -n "Restarting bandwidth shaping: "
restart
echo "done"
;;

show)

echo "Bandwidth shaping status for $IF:"
show
echo ""
;;

*)

pwd=$(pwd)
echo "Usage: tc.bash {start|stop|restart|show}"
;;

esac

exit 0

thanks

I first like to run simple commands then try narrow it down to my needs. Your first question is finding active internet ports:

$/sbin/ifconfig
$man ifconfig <- useful for find out correct syntax to use

Your second question is how to get a range of IP Address. This is one is tricky because if you just want to know the ports ip address, then we use the command above with a pipe | and grep.

$/sbin/ifconfig | grep inet

Let me know if this is what your looking for.

i have changed my mind with the ethernetports, how do i add in to this for the ethernet ports? so a array of some sort?

then seperate code for each tc i want to do?
e.g eth0=if1, eth1=if2
then do something

the range will be known ranges like 192.168.1.0/24 or 192.168.2.0.

sorry if i have confused you more

When I don't know what command to use to look for ports, try the manual.

$man -k port

or

$man -k ports

The man command is the greatest tool I use when I forget what syntax used.