Connection Reset on attempt to connect with Drager C++ provider @ HLE Plugathon

[henrivanovermeire]

Hi all,

Thank you for all your fantastic work on this library and the SDC standard. We're currently leveraging this library for device interoperability with our services; the Plugathon provides us with a unique opportunity for our first field tests :)

However, we're having some difficulty in connecting to the Dräger C++ provider, as the connection keeps getting reset.

Is this a known issue? Has anybody got an idea what the source might be? We're able to connect to other providers e.g protoSDC

[leon1995]

I think we have to dig deeper than just python

Traceback (most recent call last):
  File "C:\tools\Python\3.11\python-3.11.4-win64\Lib\socketserver.py", line 313, in _handle_request_noblock
    request, client_address = self.get_request()
                              ^^^^^^^^^^^^^^^^^^
  File "C:\tools\Python\3.11\python-3.11.4-win64\Lib\socketserver.py", line 506, in get_request
    return self.socket.accept()
           ^^^^^^^^^^^^^^^^^^^^
  File "C:\tools\Python\3.11\python-3.11.4-win64\Lib\ssl.py", line 1392, in accept
    newsock = self.context.wrap_socket(newsock,
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\tools\Python\3.11\python-3.11.4-win64\Lib\ssl.py", line 517, in wrap_socket
    return self.sslsocket_class._create(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "C:\tools\Python\3.11\python-3.11.4-win64\Lib\ssl.py", line 1075, in _create
    self.do_handshake()
  File "C:\tools\Python\3.11\python-3.11.4-win64\Lib\ssl.py", line 1346, in do_handshake
    self._sslobj.do_handshake()
ssl.SSLError: [SSL: HTTP_REQUEST] http request (_ssl.c:1002)

[henrivanovermeire]

@leon1995 I'm converting this into an issue; seems like a big enough problem to treat it that way :)

[henrivanovermeire]

@leon1995 I inquired with Alexander Pentzel earlier, and he said he was able to connect to the C++ client; perhaps a certificate issue?

[leon1995]

It seems that openssl expects a handshake but it gets an unencrypted http request. fixed by using certificates