Behind the scenes connectivity

class ngtt.uplink.connection.NGTTSocket(cert_file: str, key_file: str)

close()

Check if the resource needs cleanup, and clean up this resource.

Use like this:

>>> class MyClose(Closeable):
>>>     def close(self):
>>>         if super().close():
>>>             .. clean up ..

Returns

whether the cleanup should proceed

Raises

RuntimeError – the constructor was not invoked

connect()

Connect to remote host

Raises

SSLError – an error occurred

disconnect()

Disconnect from the remote host

recv_frame() → Optional[Tuple[int, ngtt.protocol.NGTTHeaderType, bytes]]

Receive a frame from remote socket

Raises

ConnectionFailed – connection closed

Returns

a tuple of transaction ID, header type, data

send_frame(tid: int, header: ngtt.protocol.NGTTHeaderType, data: bytes = b'') → None

Schedule a frame to be sent

Parameters

• tid – transaction ID

• header – packet type

• data – data to send

try_send()

Try to send some data