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libwebsockets/lib/system/README.md
Andy Green bce1f01370 lws_state and system state 
Introduce a generic lws_state object with notification handlers
that may be registered in a chain.

Implement one of those in the context to manage the "system state".

Allow other pieces of lws and user code to register notification
handlers on a context list.  Handlers can object to or take over
responsibility to move forward and retry system state changes if
they know that some dependent action must succeed first.

For example if the system time is invalid, we cannot move on to
a state where anything can do tls until that has been corrected.
2019-09-22 09:35:07 -07:00

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LWS System Helpers

Lws now has a little collection of helper utilities for common network-based functions necessary for normal device operation, eg, async DNS, ntpclient (necessary for tls validation), and DHCP client.

Conventions

If any system helper is enabled for build, lws creates an additional vhost "system" at Context Creation time. Wsi that are created for the system features are bound to this. In the context object, this is available as .vhost_system.