Device handlers need a way to pass data back to NetworkManager, such
as the ifindex and an error message. Allow them to return a dictionary
on standard output, where each line contains a "$key=$value" pair.
In the daemon, the dictionary is returned via the callback function.
(cherry picked from commit d72f26b875)
Add a new "generic.device-handler" property that specifies the name of
a dispatcher script to be invoked to add and delete the interface for
this connection.
(cherry picked from commit e686ab35b3)
Properties in the "user" setting are a convenient way to associate any
kind of user-provided metadata to connections.
However, nmcli doesn't support the user setting at the moment and
adding this feature requires a significant effort. Without nmcli
support, dispatcher scripts can only access user properties by either
parsing connection files or by using D-Bus (with or without libnm and
GObject introspection). Since both these solutions are not very
convenient, provide an alternative way: pass the properties as
environment variables.
(cherry picked from commit d7c311eb85)
NetworkManager dispatcher will now run dispatcher scripts with 'reapply'
as action as well. Each time the connection is reapplied on a device,
this action is triggered. Document this action in the documentation.
(cherry picked from commit 0e3d2c367c)
