[Bridge] Making a bridge work without source address spoofing

Saxer, John -ACDSD John.Saxer at itt.com
Wed Jul 14 10:38:18 PDT 2004


So, I agree, the curent wireless card I have been given does not allow source address spoofing, but I still would like to use bridging. I wonder if anyone has tried modifying the bridge code to encapsulate the actual packet in some way so that the desired source address can be preserved?

I am thinking of something like duplicating the ETH header, adding it to the beginning of the packet, so that there are 2 headers. I know that the wireless card strips the header off, adding its own header, and so it would strip off the extra one, leaving the original unchanged. Then, when the packet arrives, I would add software to strip the wireless header off again, leaving me with the original packet again!

I guess I am thinking that I could add this "extra" header processing in the wireless driver. Do you think this might work?

John Saxer
ITT A/CD San Diego

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