session
IN: The session object.
response_codep
OUT: Updated to be the HTTP response code.
errstr
IN: Updated to be the error returned in the response body if the response code is not 200 (OK). errstr should not be written to by the application (that is, it is read only), and will persist until the next request to the 5800 system server or until hc_session_free is called, whichever comes first.