From: Vincent Whitchurch
Date: Mon, 3 Sep 2018 16:23:36 +0200
> Currently, the only way to ignore outgoing packets on a packet socket is
> via the BPF filter. With MSG_ZEROCOPY, packets that are looped into
> AF_PACKET are copied in dev_queue_xmit_nit(), and this copy happens even
> if the filt
Currently, the only way to ignore outgoing packets on a packet socket is
via the BPF filter. With MSG_ZEROCOPY, packets that are looped into
AF_PACKET are copied in dev_queue_xmit_nit(), and this copy happens even
if the filter run from packet_rcv() would reject them. So the presence
of a packet
