This is a speculative fix for epiphany#533, which we think might be
caused by xdg-desktop-portal not ever being started. This service is
started on-demand, not automatically.
The ::network-changed signal is documented to indicate any change in
network configuration, which doesn't necessarily imply a property
change - additional services becoming available after connecting to
a VPN comes to mind for instance.
In order to match the "native" network monitor's behavior, always
emit the signal when it's in response to the 'changed' D-Bus signal.
Also emit the signal unconditionally when loading the initial property
values, to allow clients to differentiate between "offline" meaning
"offline" and "offline" meaning "uninitialized".
Rearrange the code so we try version 3 first,
falling back to version 2 and then version 1.
We still do a construct-time check to ensure
that we work with unsupported versions.
Note that this also takes care of setting the
initial property values in the version 1 case.
Version 3 of the network monitor portal interface adds
a CanReach method. Use it to implement can_reach.
The docs state that can_reach will either return TRUE
or set an error. So, set an error of G_IO_ERROR_HOST_UNREACHABLE
when the portal returns FALSE for CanReach.
The network monitor portal interface is changing.
Version 2 is no longer using properties, but getters
instead (this lets the portal apply access control
and avoid sending information to non-networked
sandboxes).
To support both version 1 and 2 of the interface,
we stop using generated code and instead deal with
the api differences in our own code, which is not
too difficult.
Support version 1 as well
When using g_network_monitor_get_default() from another thread, it’s
possible for network-changed events to be processed after an instance of
GNetworkMonitor has been disposed, causing use-after-free problems.
Fix that by moving some of the initialisation into the GInitable.init()
chain, rather than in a main context idle callback.
This includes a unit test which probabilistically reproduces the bug
(but can’t do so deterministically due to it being a race condition).
Commit amended by Philip Withnall <withnall@endlessm.com> before
pushing.
https://bugzilla.gnome.org/show_bug.cgi?id=793727
When we are inside a sandbox, we want to use the portal
implementation, since it is the only one that has a chance
of working.
This is safe to do, since the portal implementation will
just fail initialization when loaded outside a sandbox.
The backend for this lives in xdg-desktop-portal,
and is in turn using GNetworkMonitor.
When network is not available in the sandbox, there is
no point in reporting accurately about the network
status outside the sandbox. Just return 'no connection'
in this case.
https://bugzilla.gnome.org/show_bug.cgi?id=768498
