On Tue, Jan 3, 2017 at 6:27 PM, Sowmini Varadhan <sowmini.varad...@oracle.com> wrote: > Packets from any/all interfaces may be queued up on the PF_PACKET socket > before it is bound to the loopback interface by psock_tpacket, and > when these are passed up by the kernel, they should not be counted > toward the conditions needed to pass/fail the Rx tests.
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.
