mirror of
https://github.com/opnsense/docs
synced 2024-11-01 15:40:23 +00:00
137 lines
4.7 KiB
ReStructuredText
137 lines
4.7 KiB
ReStructuredText
============
|
||
Architecture
|
||
============
|
||
|
||
The main focus of the OPNsense project is to provide a secure and
|
||
manageable platform for all your security applications. This means high
|
||
quality software that is easily maintainable and bug free. We think that
|
||
having a framework with a clear separation of concerns is essential to
|
||
achieving these goals.
|
||
|
||
OPNsense is a fork of pfSense ®. The existing code base of pfSense ®
|
||
does not always apply a clear separation of concerns. This means we need
|
||
a transition of the old (legacy) code base to a new one with a clear
|
||
separation. We have chosen a gradual transition to avoid a big bang and
|
||
keep the product feature rich while increasing code quality. This
|
||
enables simple addition of new features with less bugs and shorter time
|
||
to market.
|
||
|
||
This article describes how this will be achieved.
|
||
|
||
-----------------------
|
||
High-level architecture
|
||
-----------------------
|
||
|
||
|OPNsense Components.png|
|
||
|
||
As the above model shows there are two main areas in our stack, the
|
||
frontend implemented with PHP/Phalcon and the backend using a custom
|
||
service built in Python.
|
||
|
||
The frontend handles user interaction and communicates with the backend
|
||
service. Applying configuration changes, monitoring and controlling
|
||
services offered by OPNsense is done by the backend service.
|
||
|
||
By using a fully configurable backend service, we avoid hardcoding of
|
||
services and ease the implementation of new features.
|
||
|
||
The frontend stack delivers a model driven approach to handle
|
||
configuration data, including automatic validation.
|
||
|
||
Manipulation of the core configuration file is handled at the frontend
|
||
model; the backend service is merely a consumer of the information
|
||
provided.
|
||
|
||
--------------------
|
||
Backend Architecture
|
||
--------------------
|
||
|
||
|OPNsense backend.png|
|
||
|
||
Configd, is responsible
|
||
for the core system interaction like starting and stopping of daemons
|
||
and generating configuration files for used services and applications.
|
||
|
||
The daemon listens on a unix domain socket and is capable of executing
|
||
actions defined in it’s own configuration directory
|
||
(“/usr/local/opnsense/service/conf/actions\_\*.conf”).
|
||
|
||
Currently there are two types of services implemented in the daemon:
|
||
|
||
- script : execute external (rc) scripts
|
||
- inline : perform inline actions which are part of configd, currently
|
||
only template generation.
|
||
|
||
|
|
||
| Template generation is handled by Jinja2 (http://jinja.pocoo.org/),
|
||
more information on how to create application templates can be found
|
||
at :doc:`/development/backend/templates`.
|
||
|
||
---------------------
|
||
Frontend Architecture
|
||
---------------------
|
||
|
||
|OPNsense frontend.png|
|
||
|
||
Routing
|
||
-------
|
||
|
||
The OPNsense framework uses components from Phalcon where possible; the
|
||
first layer initializes Phalcon’s routing, which handles requests and
|
||
delivers them to the controller based on its url. User content is
|
||
generated using Volt templates, which are picked by the controller.
|
||
Because Phalcon’s default Models function with (relational) databases
|
||
and we are using XML data, our model implementation is custom. But
|
||
wherever possible we use components from Phalcon (for example,
|
||
validation is handled using Phalcon’s classes). For a detailed
|
||
description on the routing principles used in OPNsense, visit Frontend
|
||
:doc:`/development/frontend/routing`.
|
||
|
||
Controllers and views
|
||
---------------------
|
||
|
||
Not all parts of the framework are already implemented, but by deriving
|
||
all controllers from the base in the OPNsense project it’s easy to
|
||
extend and adapt to future needs. Documentation on how to implement
|
||
controllers, with the use of views, can be found at :doc:`/development/frontend/controller`.
|
||
|
||
Models
|
||
------
|
||
|
||
All models are defined by a combination of a class and an XML containing
|
||
a (nested) definition. More information on defining models can be found
|
||
at the frontend model page :doc:`/development/frontend/models`.
|
||
|
||
Communication
|
||
-------------
|
||
|
||
Communication to the backend service is handled via a unix domain
|
||
socket.
|
||
|
||
Core system
|
||
-----------
|
||
|
||
The core of OPNsense is powered by an almost standard HardenedBSD ® system
|
||
extended with packages using the pkg system. GIT is used for version
|
||
control and the repositories are split into 4 parts:
|
||
|
||
- src : the base (HardenedBSD ®) system
|
||
- ports : the ports collection containing third party software
|
||
- core : the OPNsense gui and system configuration parts
|
||
- tools : easy tools to build OPNsense
|
||
|
||
.. TIP::
|
||
|
||
| For detailed information about the development workflow see:
|
||
| :doc:`OPNsense development workflow </development/workflow>`
|
||
|
||
.. |OPNsense Components.png| image:: images/OPNsense_Components.png
|
||
:width: 600px
|
||
:height: 548px
|
||
.. |OPNsense backend.png| image:: images/OPNsense_backend.png
|
||
:width: 600px
|
||
:height: 575px
|
||
.. |OPNsense frontend.png| image:: images/OPNsense_frontend.png
|
||
:width: 600px
|
||
:height: 461px
|