When we have not yet communicated with a peer, send a
TSMPDiscoAdvertisement to let the peer know of our disco key. This is in
most cases redundant, but will allow us to set up direct connections
when the client cannot access control.
Some parts taken from: #18073
Updates #12639
Signed-off-by: Claus Lensbøl <claus@tailscale.com>
When using the resolve.conf file for setting DNS, it is possible that
some other services will trample the file and overwrite our set DNS
server. Experiments has shown this to be a racy error depending on how
quickly processes start.
Make an attempt to trample back the file a limited number of times if
the file is changed.
Updates #16635
Signed-off-by: Claus Lensbøl <claus@tailscale.com>
The service was starting after systemd itself, and while this
surprisingly worked for some situations, it broke for others.
Change it to start after a GUI has been initialized.
Updates #17656
Signed-off-by: Claus Lensbøl <claus@tailscale.com>
Adds a new types of TSMP messages for advertising disco keys keys
to/from a peer, and implements the advertising triggered by a TSMP ping.
Needed as part of the effort to cache the netmap and still let clients
connect without control being reachable.
Updates #12639
Signed-off-by: Claus Lensbøl <claus@tailscale.com>
Co-authored-by: James Tucker <james@tailscale.com>
This compares the warnings we actually care about and skips the unstable
warnings and the changes with no warnings.
Fixes#17635
Signed-off-by: Claus Lensbøl <claus@tailscale.com>
If users start the application with sudo, DBUS is likely not available
or will not have the correct endpoints. We want to warn users when doing
this.
Closes#17593
Signed-off-by: Claus Lensbøl <claus@tailscale.com>
Before synctest, timers was needed to allow the events to flow into the
test bus. There is still a timer, but this one is not derived from the
test deadline and it is mostly arbitrary as synctest will render it
practically non-existent.
With this approach, tests that do not need to test for the absence of
events do not rely on synctest.
Updates #15160
Signed-off-by: Claus Lensbøl <claus@tailscale.com>
Also pull out interface method only needed in Linux.
Instead of having userspace do the call into the router, just let the
router pick up the change itself.
Updates #15160
Signed-off-by: Claus Lensbøl <claus@tailscale.com>
The callback itself is not removed as it is used in other repos, making
it simpler for those to slowly transition to the eventbus.
Updates #15160
Signed-off-by: Claus Lensbøl <claus@tailscale.com>
Only changes how the go routine consuming the events starts and stops,
not what it does.
Updates #15160
Signed-off-by: Claus Lensbøl <claus@tailscale.com>
Pulls out the last callback logic and ensures timers are still running.
The eventbustest package is updated support the absence of events.
Updates #15160
Signed-off-by: Claus Lensbøl <claus@tailscale.com>
This makes things work slightly better over the eventbus.
Also switches ipnlocal to use the event over the eventbus instead of the
direct callback.
Updates #15160
Signed-off-by: Claus Lensbøl <claus@tailscale.com>
The Tracker was using direct callbacks to ipnlocal. This PR moves those
to be triggered via the eventbus.
Additionally, the eventbus is now closed on exit from tailscaled
explicitly, and health is now a SubSystem in tsd.
Updates #15160
Signed-off-by: Claus Lensbøl <claus@tailscale.com>
This is a small introduction of the eventbus into controlclient that
communicates with mainly ipnlocal. While ipnlocal is a complicated part
of the codebase, the subscribers here are from the perspective of
ipnlocal already called async.
Updates #15160
Signed-off-by: Claus Lensbøl <claus@tailscale.com>
Adds the eventbus to the router subsystem.
The event is currently only used on linux.
Also includes facilities to inject events into the bus.
Updates #15160
Signed-off-by: Claus Lensbøl <claus@tailscale.com>
Make it possible to dump the eventbus graph as JSON or DOT to both debug
and document what is communicated via the bus.
Updates #15160
Signed-off-by: Claus Lensbøl <claus@tailscale.com>
Errors were mashalled without the correct newlines. Also, they could
generally be mashalled with more data, so an intermediate was introduced
to make them slightly nicer to look at.
Updates #15160
Signed-off-by: Claus Lensbøl <claus@tailscale.com>
Instead of every module having to come up with a set of test methods for
the event bus, this handful of test helpers hides a lot of the needed
setup for the testing of the event bus.
The tests in portmapper is also ported over to the new helpers.
Updates #15160
Signed-off-by: Claus Lensbøl <claus@tailscale.com>
Fragmented datagrams would be processed instead of being dumped right
away. In reality, thse datagrams would be dropped anyway later so there
should functionally not be any change. Additionally, the feature is off
by default.
Closes#16203
Signed-off-by: Claus Lensbøl <claus@tailscale.com>
Claus LensbølandGitHub
