Clang rightly does not like extern symbols that are not declared
in any header file, as typically these are not intended for global
visibility and are exposed in error. This was indeed the case with
various file-scope objects in dtlsv1listentest.c.
Reviewed-by: Richard Levitte <levitte@openssl.org>
Adds a set of tests for the newly rewritten DTLSv1_listen function.
The test pokes various packets at the function and then checks
the return value and the data written out to ensure it is what we
would have expected.
Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
