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DTN7SQLite Backend

Getting Started

To run moNNT.py with this backend in conjunction with the dtnd, first start the daemon with the node ID you have also defined in the config.toml, e.g. like so:

$ dtnd --nodeid n1 --cla mtcp

Usually, more arguments are not necessary since this backend will take care of registering all needed endpoints through the REST and WebSocket interfaces.

Take a look in the config.toml to familiarize yourself with the options. All time related options are first parsed by the pytimeparse2 package and can therefore be written in a human-readable format according to the specifications of that package, e.g.

32m
2h32m
3d2h32m
1w3d2h32m
1w 3d 2h 32m
...

Open Source Packages

For the implementation of the solution, following open source Python libraries are imported explicitly:

  • py-dtn7: dtn7-rs API wrapper for Python which also offers a Bundle class (License: AGPL-3.0)

  • toml: Python library for parsing and creating TOML (Tom's Obvious, Minimal Language) used for parsing server and backend configuration files (License: MIT)

  • Tortoise ORM: Asyncio ORM (Object Relational Mapper) used to interface with the backing SQLite database (License: Apache-2.0)

  • pytimeparse2: Library to parse various kinds of time expressions that can be used in configuration files (License: MIT)

  • websockets: Asyncio WebSockets library used for calls to the dtnd WS interface (License: BSD-3-Clause)