HiDataBus is the data bus for device side of HybridOS.

• Introduction
• Dependencies
• Current Status
• Build HiDataBus for Standalone Use
• TODO List
• Copying
  • Commercial License
  • Special Statement

In HybridOS, an important design idea is always implemented: data-driven. Regardless of whether it is a single app scenario or multiple apps scenarios, hiDataBus will act as the link between HybridOS app and the underlying functional modules; and even in the future, it will become the link between different device nodes in the LAN.

Some ideas of hiDataBus come from OpenWRT's uBus, such as passing data in JSON format. But compared to uBus, hiDataBus has the following important improvements:

• Two types of underlying connection channels are provided: local Unix Domain Socket and Web Socket, so that modules developed in different programming languages can be easily connected to hiDataBus.
• Providing a basic security mechanism to determine whether an application or a remote node can subscribe to a specific event or call a specific procedure.
• Considering that in the future, hiDataBus can provide services to other IoT device nodes in the local area network through Web Socket, we include host name information when subscribing to events and calling remote procedures.
• The redesigned hiDataBus protocol can avoid deadlock when the same app plays different roles.

HiDataBus includes the following three components:

1. HiDataBus server, an executable program which runs as a daemon in the system.
2. HiDataBus cmdline, an executable program which provides an interactive command line program for test and debugging.
3. HiDataBus library, an library which provides some APIs for clients to use hiDataBus easily.

For more information, please refer to:

https://github.com/FMSoftCN/hybridos/blob/master/docs/design/hybridos-data-bus-zh.md

HiDataBus depends on the following libraries:

• hiBox provides some utilities for HybridOS device side in C language.
• glib provides data structure handling for C language.
• OpenSSL (optional) provides support for secure WebSocket connections.

• Jan. 2021: Version 1.0.
• Dec. 2020: First release (version 0.9).
• Oct. 2020: Skeleton of source code.

To build hiDataBus for your own usage on a generic Linux box without the app management of HybridOS, use the following options for cmake:

$ cmake -DBUILD_APP_AUTH=OFF <directory_to_source_code>

If you use the -DBUILD_APP_AUTH=OFF option, hiDataBus will use a dummy app authentication method to avoid preparing your app authentication system.

• Version 1.2
  1. Support for WebSocket in libhibus.
  2. Support for plugins of builtin endpoints.
  3. Unit tests.

Copyright (C) 2020 FMSoft https://www.fmsoft.cn

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

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If you cannot accept GPLv3, you need to be licensed from FMSoft.

For more information about the commercial license, please refer to https://hybridos.fmsoft.cn/blog/hybridos-licensing-policy.

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