[Isl3893-devel] Re: Isl3893-devel digest, Vol 1 #96 - 1 msg

[Ruben Faelens]

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1. Re: change mac address for wan interface (Roland Mieslinger)
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Message: 1
Subject: Re: [Isl3893-devel] change mac address for wan interface
Date: Thu, 29 Dec 2005 15:04:12 +0100
Hi Ulf,
late response to your mail, but maybe useful.
I'm trying to setup a wireless bridge at the moment, so I've downloaded
the sources from linksys for their wet54v2 (this device is sold as
bridge).
One can compile a running image from this sources, with support for
ebtables. ebtables is a layer 2 firewall (aka. stealth firewall), it
offers access control and "mac nat".
BTW: linksys wet54gv2s5 is an isl3983 based 5 port and wlan bridge
(unlisted on project page), with very cool features like port based vlan
tagging, QoS, port mirroring (for e. g. IDS), layer 2 access lists. The
sources are available, but didn't compile out of box (smidump is not in
toolchain). I can post a workaround if someone is interested. I've it
running on an AP600.
Roland

hi,
i realized that datastore can change the mac address for the wan
interface.
a little sticker on the box gives two macs, one for the switch one for
the wan port, the wan' s mac address is +1 compair to the lan's mac
address.
so now i can change the mac by using the setoid command, but how can i
make it active?
# getoid eth2 0x0 mac
00:60:b3:06:54:20
# setoid eth2 0x0 mac aa:bb:cc:dd:ee:ff
# getoid eth2 0x0 mac
AA:BB:CC:DD:EE:FF
now the mac is changed but not active!
ifconfig eth2 give the original mac output, not the new one.
in compair to the changes i made with the wifi device, eth1, i have to
set the ssid by using setoid eth1 0x10000002 ssid 'the essid for the
net' once to set the device down and a second time to set the device
up again, that the changes i made are active, foe example to change
the channel.
any ideas?
thanks ulf

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I am very interested. If you could post a little guide on how to compile
the sources, I would be grateful.

[Geert Stappers]

Post by Ruben Faelens

Date: Thu, 29 Dec 2005 15:04:12 +0100
Hi Ulf,
late response to your mail, but maybe useful.
I'm trying to setup a wireless bridge at the moment, so I've downloaded
the sources from linksys for their wet54v2 (this device is sold as
bridge).
One can compile a running image from this sources, with support for
ebtables. ebtables is a layer 2 firewall (aka. stealth firewall), it
offers access control and "mac nat".
BTW: linksys wet54gv2s5 is an isl3983 based 5 port and wlan bridge
(unlisted on project page), with very cool features like port based vlan
tagging, QoS, port mirroring (for e. g. IDS), layer 2 access lists. The
sources are available, but didn't compile out of box (smidump is not in
toolchain). I can post a workaround if someone is interested. I've it
running on an AP600.

I am very interested. If you could post a little guide on how to compile
the sources, I would be grateful.

Having something on http://isl3893.sourceforge.net
(other then an error message ;-)
is surely a good thing.


GSt

[Roland Mieslinger]

Hi Ruben,

i'm using wet54gs5-v4.91.tar.bz2 installed in /tmp/wet54gs5 and the
stripped-toolchain installed in /opt/uclinux_tools_1.6.0.0 . I'm using
Fedora Core 4 as build system.

#cd /tmp/wet54gs5/Software/firmware/uClinux
#make menuconfig
kept values untouched, exit and save config.

#cd /tmp/wet54gs5/Software/firmware/uClinux/kernel
#make menuconfig
kept values untouched, exit and save config.

#cd /tmp/wet54gs5/Software/firmware/apfw
#make image

This fails with an error "smidump not found". Building smidump from
sources didn't solve the problem as next error will be "smidump: invalid
dump format `IslSchema' - supported formats are ... ".

The only reason for smidump is to create the file /etc/schema later
found in the romfs. The trick is to get this file from the binary
firmware from linksys (don't try without it ends up in a boot loop :-) )

I found two ways to get it.
- install the linksys firmware on a router and copy it (easy way but
serial access needed as shelld is disabled)
default ip is 192.168.1.266
username is admin, password is admin
you can use mount or nc to transfer the file
( mount -t nfs -o nolock,rsize=4096,wsize=4096,nfsvers=3 ... works,
but don't miss no_root_squash in /etc/exports )

- extract it from binary (the hackers choice)
The firmware contains a gzip compressed kernel with the a root
filesystem (details at http://www.warp.at/projects/wg602.html)

Open firmeware with hexedit, search for gzip file magic
(1F8B08) remove everything before and save as kernel.gz

gunzip kernel.gz (you should have a file called kernel now)

Open kernel in hexedit, serach for -rom1fs- (2D726F6D3166732D),
remove everything before and save as fs.img

you can mount the romfs with:
mount -o loop -t romfs fs.img /moute/where/you/like/it

You should now find a file schema in dir etc.

copy schema to
/tmp/wet54gs5/Software/firmware/uClinux/apps-non-gpl/datastore/etc/

and

#cd /tmp/wet54gs5/Software/firmware/apfw
#make image

In my case this ends with a firmeware working on a AP600. I have
problems installing the firmware in "rescue mode" as I always got "image
size exceeds flash size". So you have to boot with another firmware
first and update then to your firmware.

Roland

Post by Ruben Faelens
I am very interested. If you could post a little guide on how to compile
the sources, I would be grateful.
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