libwebsockets/lib/system/README.md

# 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`.
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. 2019-09-19 09:48:17 +01:00			`# 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`.