[OpenAFS] Is there a simple programatic method of verifying accessibility of a cell?

[Jeffrey Altman]

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Derrick J Brashear wrote:

>On Wed, 10 Sep 2003, Jeffrey Altman wrote:
>
>  
>
>>I don't want anyone to spend too much energy on thinking about this but
>>if there is a function within AFS which would allow a client machine to
>>test the state of a connection to a specific cell I would appreciate
>>having it pointed out to me.  My goal is to write a tool which will
>>monitor the state of AFS and the network adapters on a Windows system.
>>When a network adapter is enabled the tool will check the state of AFS.
>>If AFS can reach the specified cell and there are no tokens for the
>>cell, the user will be prompted to obtain them.
>>    
>>
>
>Would talking to a fileserver in the cell work, or do you need more than
>that?
>  
>

Talking to a fileserver in the cell should be good enough.  The point of 
the exercise is to try to determine when it makes sense to query the 
user for a "username/password" combination for the given cell.  Here is 
the scenario:

* AFS is running on a windows laptop which is disconnected from the 
network when the user logged in.

* The user plugs into the network and receives an IP Address.  At this 
point my tool is notified that a new IP address has been added to the 
machine. 

* I only want to prompt the user for credentials if and only if there is 
a good possibility that the cell is accessible.  If the new IP address 
is on a network which is partitioned from the cell (there is no route to 
the cell servers) I do not want to prompt the user.

Thanks.

- Jeff



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