In the unmodified linksys WRT54G, you can go to some screen and figure out the MAC Addresses of the computers connected to you.  Does that exist in OpenWRT?  I know ifconfig will get me MY mac address, is there some command like that to give you the Mac Addresses of the connected computers?

I am dumb =Þ

Nevermind, I figured it out, script coming soon for reference to others.

I need your script! Have you one ?

wl assoclist

yeah, I knew about the assoclist, but I needed the mac address of the gateway for the wan port.  I have to lock my clients onto the first thing they plug this into.  Assoclist would probably work for most people though.

Dev, gimme today to organize my thoughts and I will post what I do go to the gateway mac.  Most people probably will not need to lock their clients into one gateway though so this may not be what you need.

I need data about Signal and Link Quality and noise, a dont want to log my clients.
i only want to improve my links and transferspeed.

wl assoclist - dont work for me

Well here, eventually I will probably put this up on some mini-howto somewhere but here is a summary for you now.

first, let me just say that I use scripts to do things like find the IPs and gateways.  So I am going to post these scripts for reference.  It is easier for me to remember /usr/bin/whatismygw than all that grepping(sp?) and such
whatismygw looks like this

#!/bin/sh

netstat -rn | grep UG|tail -1 | awk '{print $2}'

whatismygwmac looks like this:

#!/bin/sh

arping -fq -I vlan1 `whatismygwpptp`

cat /proc/net/arp | grep `whatismygwpptp` | awk '{print $4}'

Ok, little explanation,

On the GW one.  I need a way to easily find my gateway.  So I use the netstat -rn command to list my routes and I grab the one where the flag is UG (U = useable or active; G = gateway).  I actually use this little one line script to find my gateway in a lot of my other scripts, which is why I wrote something to easily reference it.

As for the whatismygwmac script.  I use arping to get the MAC address in the arp tables.  For those who don't know a whole lot about arping (I don't either), let me break down what I am doing there for you.  arping -fq -I vlan1 `whatismygw`.  -f means stop after the first response (I only need to ping once to get the mac address).  -q means stfu, so no extra info is put in variables if I set them like so

mymacgw=`whatismygwmac`

otherwise, the response from the script would be:

which has one line too much information.  I just assume arping connected so I don't care about the response.  Continuing on, -I tells you what interface to use.  In my case, I am trying to get the MAC address of my router's gateway, so I use vlan1 (my wan port).  If you are trying to do this to something on the inside, you would have to modify it accordingly.  A note about the -I tag, you don't have to use it.  If for some reason, you don't know what interface you are looking for you can set it like

The "-c 1" means that it only would try on each interface once before it moved on (count = 1).  I really do not recommend this way of doing things as you then have to put a pause in your script to allow the arping to make it through all the interfaces.  The script may look something like this:

#!/bin/sh

arping -fq -c 1 `whatismygw`

sleep {# of seconds needed}

cat /proc/net/arp | grep `whatismygw` | awk '{print $4}'

You will probably have to pause at least 5 seconds to let arping scan all interfaces.

Finally you would replace `whatismygw` with whatever IP you are trying to find the MAC address for.

Lemme know if you have any questions.  May be better off to PM or email me, because I check stuff sporatically.

Sorry about any spelling errors.

(Last edited by t0ksik on 23 Nov 2005, 17:23)