pkt_stream_replace_half
if (pkt_stream_replace_half(test, MIN_PKT_SIZE * 4, 0))
if (pkt_stream_replace_half(test, XSK_UMEM__INVALID_FRAME_SIZE, 0))
if (pkt_stream_replace_half(test, MIN_PKT_SIZE, -MIN_PKT_SIZE / 2))