end-of-file was reached
an operation was canceled
invalid arguments were provided to a function
last error
a network problem occurred, h_errno contains more details
no memory was available for the operation
function not implemented
the host is not an IP host
a parsing error occurred
a host resolve error occurred
some unspecified error occurred
a system error occurred, errno contains more details
the tunnel GET request has been performed
a timeout occurred
the tunnel POST request has been performed
windows networking could not start
windows networking stack has wrong version
no error
Result codes from the RTSP functions.