The difference between read() in client and Nread() in serve

[Sunyifan-123]

In iperf3 v3.17.1, the iperf_handle_message_server function uses Nread() to check test->ctrl_sck, while iperf_handle_message_client uses read() to check test->ctrl_sck. Why is this read() and not Nread()?

[davidBar-On]

I believe that this is only because of historical reasons and that the client should also use Nread() (this is also hinted by the comment preceding the read()). In addition, as part of the changes in PR #1843 I changed the read() to Nread() and it seemed to work with no problems.