On (01/04/17 09:30), Willem de Bruijn wrote: > > The common and simpler solution to this problem is to open the socket > with protocol 0 to reject all packets, add the BPF filter and only then bind > with sll_ifindex set to lo. That way no false positives can arrive.
Yes, I thought of that too (and I've seen that done in one commercial implementation), but given that tpacket nicely returns the incoming interface, I figured, why not use the test prog to use this (thus verifying it, and also showing how to use it) --Sowmini
