iperf_set_test_zerocopy(struct iperf_test *ipt, int zerocopy)
{
    ipt->zerocopy = (zerocopy && has_sendfile());
}
iperf_set_test_zerocopy(struct iperf_test *ipt, int zerocopy)
{
    ipt->zerocopy = (zerocopy && has_sendfile());
}