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Date:  Wed, 20 Oct 2004 00:59:40 +0200
Sender: os2-wireless_users-owner <os2-wireless_users-owner@2rosenthals.com>
Reply-To: os2-wireless_users@2rosenthals.com
From:  Christian Langanke <os2-wireless_users@2rosenthals.com>
To:  os2-wireless_users@2rosenthals.com
Subject: [OS2Wireless] Wireless LAN new features - please test


Hi *,

I released a test version to

http://www.clanganke.de/test/deb103_1004.zip

This includes the standalone executable only. If you use it, make sure 
that you stop any XCenter running the widget.

New features:
     new startup properties page for enable/disable radio

     new submenu for to (reconfigure) or disable the IP interface bound 
to the wifi nic. This should help for scenario 3, when you want to 
switch from wifi nic to wired nic, at least you can free up the DHCP 
lease properly. I have no clue yet how a user can best issue a DHCP 
request for the wired nic after having released the one from the wifi 
nic - I am not sure if such a feature should be part of XWLAN and where 
it could be integrated... OTOH we otherwise may have to come back to the 
2nd best solution: scripts...

     conflict detection: whenever XWLAN configures the IP interface for 
the wifi nic (either with a static address or by DHCP), XWLAN checks if  
any other interface is configured for the same IP segment. If so, a 
popup asks to either disable the conflicting (cabled) interface or to 
take back the configuration for the wifi nic. Check the config of both 
lan interfaces with ifconfig before and after you pressed either buttons 
- it should have deleted either interface to resolve the conflict.

     the code executing the DHCP config/unconfig now issues dhcpmon 
calls only (no more kill of DHCPCD.EXE)

     whenever the configuration of the wifi nic IP has been completed, 
XWLAN flushes the ARP cache (!!). I think this has not been noticed in 
the previous discussions, but is very important, once the same router 
needs to be reached over a different interface. If the arp cache is not 
flushed, the arp entry will make the stack stick to the hardware used 
last time, even when the IP interface has been deleted.Interestingly, it 
is not even necessary to kick out obsolete "duplicate" entries of net 
routes out of the routing table (see ntetstat -r) after having switched 
the default route from lan0 to lan1(or vice versa) - even if there are 
still net routes pointing to the now unavailable interface (ssee 
rightost column of netstat -r), the IP stack manages to find the correct 
route once the arp cache is flushed.

-----

One drawback of the new version is:: as the size properties data has 
growed by a few bytes,  the old properties data may be discarded by the 
new version (same applies when you launch the old version after having 
run the new one). To backup the properties data you may want to IMPINI 
from my homepage and execute the following command on commandline:

    impini user xwlbak.ini /A:"Wireless LAN Monitor:Properties"

To restore the data before running old versions again, execute

    impini xwlbak.ini user /A:"Wireless LAN Monitor:Properties"

-----

I think you have something to play with for now  ;-) and await your 
feedback.

thanx, Christian

-------------------------------------------------

Christian Langanke
COS2E & CWSE
Team OS/2 Ruhr e.V.
cla@clanganke.de

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