Access to exceptions
A read or write cannot be done because the descriptor is in
non-blocking mode and would block. This corresponds to the
error but includes whether it was a read or write.
When the read or write is possible, the interrupted function should
simply be again called.
These two exceptions are preferred by TLS providers.
The server requested a rehandshake (this exception is thrown
in the client)
exception TLS_switch_response of
The client accepted or denied a rehandshake (this exception is thrown
in the server).
true means acceptance.
exception TLS_error of
A fatal error occurred (i.e. the session needs to be terminated).
The string is a symbol identifying the error.
exception TLS_warning of
A non-fatal error occurred. The interrupted function should be
The string is a symbol identifying the warning.