Packet tapping

From: Manoj Sontakke (manojs@sasken.com)
Date: Wed Sep 12 2001 - 04:32:56 EST


Hi,
        Is it possible to tap a packet and send it to a userlevel program
before it is sent to appropriate receive function (say ip_rcv()). The
user level program will give the packet back to the kernel for delivery
to appropriate receive function.
        In short, is it possible to have a protocol stack (between layer 2 and
3) to be implemented in useland.

        Is Tun/Tap driver useful here?

Thanks for all the help
Manoj
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