Currently, LocalBackend/ExtensionHost doesn't invoke the profile change callback for the initial profile.
Since the initial profile may vary depending on loaded extensions and applied policy settings,
it can't be reliably determined until all extensions are initialized. Additionally, some extensions
may asynchronously trigger a switch to the "best" profile (based on system state and policy settings) during
initialization.
We intended to address these issues as part of the ongoing profileManager/LocalBackend refactoring,
but the changes didn't land in time for the v1.84 release and the Taildrop refactoring.
In this PR, we update the Taildrop extension to retrieve the current profile at initialization time
and handle it as a profile change.
We also defer extension initialization until LocalBackend has started, since the Taildrop extension
already relies on this behavior (e.g., it requires clients to call SetDirectFileRoot before Init).
Fixes#15970
Updates #15812
Updates tailscale/corp#28449
Signed-off-by: Nick Khyl <nickk@tailscale.com>
We previously kept these methods in local.go when we started moving node-specific state
from LocalBackend to nodeBackend, to make those changes easier to review. But it's time
to move them to node_backend.go.
Updates #cleanup
Updates #12614
Signed-off-by: Nick Khyl <nickk@tailscale.com>
In this PR, we make the "user-dial-routes" behavior default on all platforms except for iOS and Android.
It can be disabled by setting the TS_DNS_FORWARD_USE_ROUTES envknob to 0 or false.
Updates #12027
Updates #13837
Signed-off-by: Nick Khyl <nickk@tailscale.com>
I'd moved the osshare calls to feature/taildrop hooks, but forgot to
remove them from ipnlocal, or lost them during a rebase.
But then I noticed cmd/tailscaled also had some, so turn those into a
hook.
Updates #12614
Change-Id: I024fb1d27fbcc49c013158882ee5982c2737037d
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This is an integration test that covers all the code in Direct, Auto, and
LocalBackend that processes NetMaps and creates a Filter. The test uses
tsnet as a convenient proxy for setting up all the client pieces correctly,
but is not actually a test specific to tsnet.
Updates tailscale/corp#20514
Signed-off-by: James Sanderson <jsanderson@tailscale.com>
Until we turn on AAAA by default (which might make some people rely on
Happy Eyeballs for targets without IPv6), this lets people turn it on
explicitly if they want.
We still should add a peer cap as well in the future to let a peer
explicitly say that it's cool with IPv6.
Related: #9574
Updates #1813
Updates #1152
Change-Id: Iec6ec9b4b5db7a4dc700ecdf4a11146cc5303989
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Cleanup after #15866. It was using a mix of "b" and "c" before. But "b"
is ambiguous with LocalBackend's usual "b".
Updates #12614
Change-Id: I8c2e84597555ec3db0d783a00ac1c12549ce6706
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
As just discussed on Slack with @nickkhyl.
Updates #12614
Change-Id: I138dd7eaffb274494297567375d969b4122f3f50
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This fixes the Taildrop deadlock from 8b72dd787320.
Fixes#15824
Change-Id: I5ca583de20dd0d0b513ce546439dc632408ca1f1
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
We update profileManager to allow registering a single state (profile+prefs) change hook.
This is to invert the dependency between the profileManager and the LocalBackend, so that
instead of LocalBackend asking profileManager for the state, we can have profileManager
call LocalBackend when the state changes.
We also update feature.Hook with a new (*feature.Hook).GetOk method to avoid calling both
IsSet and Get.
Updates tailscale/corp#28014
Updates #12614
Signed-off-by: Nick Khyl <nickk@tailscale.com>
This adds a feature/taildrop package, a ts_omit_taildrop build tag,
and starts moving code to feature/taildrop. In some cases, code
remains where it was but is now behind a build tag. Future changes
will move code to an extension and out of LocalBackend, etc.
Updates #12614
Change-Id: Idf96c61144d1a5f707039ceb2ff59c99f5c1642f
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
In this PR, we enable extensions to track changes in the current prefs. These changes can result from a profile switch
or from the user or system modifying the current profile’s prefs. Since some extensions may want to distinguish between
the two events, while others may treat them similarly, we rename the existing profile-change callback to become
a profile-state-change callback and invoke it whenever the current profile or its preferences change. Extensions can still
use the sameNode parameter to distinguish between situations where the profile information, including its preferences,
has been updated but still represents the same tailnet node, and situations where a switch to a different profile has been made.
Having dedicated prefs-change callbacks is being considered, but currently seems redundant. A single profile-state-change callback
is easier to maintain. We’ll revisit the idea of adding a separate callback as we progress on extracting existing features from LocalBackend,
but the conversion to a profile-state-change callback is intended to be permanent.
Finally, we let extensions retrieve the current prefs or profile state (profile info + prefs) at any time using the new
CurrentProfileState and CurrentPrefs methods. We also simplify the NewControlClientCallback signature to exclude
profile prefs. It’s optional, and extensions can retrieve the current prefs themselves if needed.
Updates #12614
Updates tailscale/corp#27645
Updates tailscale/corp#26435
Updates tailscale/corp#27502
Signed-off-by: Nick Khyl <nickk@tailscale.com>
updates tailscale/tailscale#13476
On darwin, os.Hostname is no longer reliable when called
from a sandboxed process. To fix this, we will allow clients
to set an optional callback to query the hostname via an
alternative native API.
We will leave the default implementation as os.Hostname since
this works perfectly well for almost everything besides sandboxed
darwin clients.
Signed-off-by: Jonathan Nobels <jonathan@tailscale.com>
In this PR, we add two methods to facilitate extension lookup by both extensions,
and non-extensions (e.g., PeerAPI or LocalAPI handlers):
- FindExtensionByName returns an extension with the specified name.
It can then be type asserted to a given type.
- FindMatchingExtension is like errors.As, but for extensions.
It returns the first extension that matches the target type (either a specific extension
or an interface).
Updates tailscale/corp#27645
Updates tailscale/corp#27502
Signed-off-by: Nick Khyl <nickk@tailscale.com>
In this PR, we refactor the LocalBackend extension system, moving from direct callbacks to a more organized extension host model.
Specifically, we:
- Extract interface and callback types used by packages extending LocalBackend functionality into a new ipn/ipnext package.
- Define ipnext.Host as a new interface that bridges extensions with LocalBackend.
It enables extensions to register callbacks and interact with LocalBackend in a concurrency-safe, well-defined, and controlled way.
- Move existing callback registration and invocation code from ipnlocal.LocalBackend into a new type called ipnlocal.ExtensionHost,
implementing ipnext.Host.
- Improve docs for existing types and methods while adding docs for the new interfaces.
- Add test coverage for both the extracted and the new code.
- Remove ipn/desktop.SessionManager from tsd.System since ipn/desktop is now self-contained.
- Update existing extensions (e.g., ipn/auditlog and ipn/desktop) to use the new interfaces where appropriate.
We're not introducing new callback and hook types (e.g., for ipn.Prefs changes) just yet, nor are we enhancing current callbacks,
such as by improving conflict resolution when more than one extension tries to influence profile selection via a background profile resolver.
These further improvements will be submitted separately.
Updates #12614
Updates tailscale/corp#27645
Updates tailscale/corp#26435
Updates tailscale/corp#18342
Signed-off-by: Nick Khyl <nickk@tailscale.com>
Ultimately, we'd like to get rid of the concept of the "current user". It is only used on Windows,
but even then it doesn't work well in multi-user and enterprise/managed Windows environments.
In this PR, we update LocalBackend and profileManager to decouple them a bit more from this obsolete concept.
This is done in a preparation for extracting ipnlocal.Extension-related interfaces and types, and using them
to implement optional features like tailscale/corp#27645, instead of continuing growing the core ipnlocal logic.
Notably, we rename (*profileManager).SetCurrentUserAndProfile() to SwitchToProfile() and change its signature
to accept an ipn.LoginProfileView instead of an ipn.ProfileID and ipn.WindowsUserID. Since we're not removing
the "current user" completely just yet, the method sets the current user to the owner of the target profile.
We also update the profileResolver callback type, which is typically implemented by LocalBackend extensions,
to return an ipn.LoginProfileView instead of ipn.ProfileID and ipn.WindowsUserID.
Updates tailscale/corp#27645
Updates tailscale/corp#18342
Signed-off-by: Nick Khyl <nickk@tailscale.com>
initPeerAPIListener may be returning early unexpectedly. Add debug logging to
see what causes it to return early when it does.
Updates #14393
Signed-off-by: Percy Wegmann <percy@tailscale.com>
If we previously knew of macaddresses of a node, and they
suddenly goes to zero, ignore them and return the previous
hardware addresses.
Updates tailscale/corp#25168
Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
In this PR, we update ipnlocal.LocalBackend to allow registering callbacks for control client creation
and profile changes. We also allow to register ipnauth.AuditLogFunc to be called when an auditable
action is attempted.
We then use all this to invert the dependency between the auditlog and ipnlocal packages and make
the auditlog functionality optional, where it only registers its callbacks via ipnlocal-provided hooks
when the auditlog package is imported.
We then underscore-import it when building tailscaled for Windows, and we'll explicitly
import it when building xcode/ipn-go-bridge for macOS. Since there's no default log-store
location for macOS, we'll also need to call auditlog.SetStoreFilePath to specify where
pending audit logs should be persisted.
Fixes#15394
Updates tailscale/corp#26435
Updates tailscale/corp#27012
Signed-off-by: Nick Khyl <nickk@tailscale.com>
LocalBackend transitions to ipn.NoState when switching to a different (or new) profile.
When this happens, we should unconfigure wgengine to clear routes, DNS configuration,
firewall rules that block all traffic except to the exit node, etc.
In this PR, we update (*LocalBackend).enterStateLockedOnEntry to do just that.
Fixes#15316
Updates tailscale/corp#23967
Signed-off-by: Nick Khyl <nickk@tailscale.com>
fixestailscale/tailscale#15394
In the current iteration, usage of the memstore for the audit
logger is expected on some platforms.
Signed-off-by: Jonathan Nobels <jonathan@tailscale.com>
On Windows and Android, peerAPIListeners may be initialized after a link change.
This commit adds log statements to make it easier to trace this flow.
Updates #14393
Signed-off-by: Percy Wegmann <percy@tailscale.com>
Currently nobody calls SetTailscaleInterfaceName yet, so this is a
no-op. I checked oss, android, and the macOS/iOS client. Nobody calls
this, or ever did.
But I want to in the future.
Updates #15408
Updates #9040
Change-Id: I05dfabe505174f9067b929e91c6e0d8bc42628d7
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
I noticed logs on one of my machines where it can't auto-update with
scary log spam about "failed to apply tailnet-wide default for
auto-updates".
This avoids trying to do the EditPrefs if we know it's just going to
fail anyway.
Updates #282
Change-Id: Ib7db3b122185faa70efe08b60ebd05a6094eed8c
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
(*LocalBackend).setControlClientLocked() is called to both set and reset b.cc.
We shouldn't attempt to start the audit logger when b.cc is being reset (i.e., cc is nil).
However, it's fine to start the audit logger if b.cc implements auditlog.Transport, even if it's not a controlclient.Auto but a mock control client.
In this PR, we fix both issues and add an assertion that controlclient.Auto is an auditlog.Transport. This ensures a compile-time failure if controlclient.Auto ever stops being a valid transport due to future interface or implementation changes.
Updates tailscale/corp#26435
Signed-off-by: Nick Khyl <nickk@tailscale.com>
Resetting LocalBackend's netmap without also unconfiguring wgengine to reset routes, DNS, and the killswitch
firewall rules may cause connectivity issues until a new netmap is received.
In some cases, such as when bootstrap DNS servers are inaccessible due to network restrictions or other reasons,
or if the control plane is experiencing issues, this can result in a complete loss of connectivity until the user disconnects
and reconnects to Tailscale.
As LocalBackend handles state resets in (*LocalBackend).resetForProfileChangeLockedOnEntry(), and this includes
resetting the netmap, resetting the current netmap in (*LocalBackend).Start() is not necessary.
Moreover, it's harmful if (*LocalBackend).Start() is called more than once for the same profile.
In this PR, we update resetForProfileChangeLockedOnEntry() to reset the packet filter and remove
the redundant resetting of the netmap and packet filter from Start(). We also update the state machine
tests and revise comments that became inaccurate due to previous test updates.
Updates tailscale/corp#27173
Signed-off-by: Nick Khyl <nickk@tailscale.com>
updates tailscale/corp#26435
Adds client support for sending audit logs to control via /machine/audit-log.
Specifically implements audit logging for user initiated disconnections.
This will require further work to optimize the peristant storage and exclusion
via build tags for mobile:
tailscale/corp#27011tailscale/corp#27012
Signed-off-by: Jonathan Nobels <jonathan@tailscale.com>
We're computing the list of services to hash by iterating over the
values of a map, the ordering of which is not guaranteed. This can cause
the hash to fluctuate depending on the ordering if there's more than one
service hosted by the same host.
Updates tailscale/corp#25733.
Signed-off-by: Naman Sood <mail@nsood.in>
Previously, it initialized when the backend was created. This caused two problems:
1. It would not properly switch when changing profiles.
2. If the backend was created before the profile had been selected, Taildrive's shares were uninitialized.
Updates #14825
Signed-off-by: Percy Wegmann <percy@tailscale.com>
We previously were not merging in the TaildropTarget into the PeerStatus because we did not update AddPeer.
Updates tailscale/tailscale#14393
Signed-off-by: kari-ts <kari@tailscale.com>
This commit updates the logic of vipServicesFromPrefsLocked, so that it would return the vipServices list
even when service host is only advertising the service but not yet serving anything. This makes control
always get accurate state of service host in terms of serving a service.
Fixestailscale/corp#26843
Signed-off-by: KevinLiang10 <37811973+KevinLiang10@users.noreply.github.com>
In this PR, we update the LocalBackend so that when the ReconnectAfter policy setting is configured
and a user disconnects Tailscale by setting WantRunning to false in the profile prefs, the LocalBackend
will now start a timer to set WantRunning back to true once the ReconnectAfter timer expires.
We also update the ADMX/ADML policy definitions to allow configuring this policy setting for Windows
via Group Policy and Intune.
Updates #14824
Signed-off-by: Nick Khyl <nickk@tailscale.com>
We already reset the always-on override flag when switching profiles and in a few other cases.
In this PR, we update (*LocalBackend).Start() to reset it as well. This is necessary to support
scenarios where Start() is called explicitly, such as when the GUI starts or when tailscale up is used
with additional flags and passes prefs via ipn.Options in a call to Start() rather than via EditPrefs.
Additionally, we update it to apply policy settings to the current prefs, which is necessary
for properly overriding prefs specified in ipn.Options.
Updates #14823
Signed-off-by: Nick Khyl <nickk@tailscale.com>
Hostinfo.WireIngress is used as a hint that the node intends to use
funnel. We now send another field, IngressEnabled, in cases where
funnel is explicitly enabled, and the logic control-side has
been changed to look at IngressEnabled as well as WireIngress in all
cases where previously the hint was used - so we can now stop sending
WireIngress when IngressEnabled is true to save some bandwidth.
Updates tailscale/tailscale#11572
Updates tailscale/corp#25931
Signed-off-by: Irbe Krumina <irbe@tailscale.com>
In this PR, we enable the registration of LocalBackend extensions to exclude code specific to certain
platforms or environments. We then introduce desktopSessionsExt, which is included only in Windows builds
and only if the ts_omit_desktop_sessions tag is disabled for the build. This extension tracks desktop sessions
and switches to (or remains on) the appropriate profile when a user signs in or out, locks their screen,
or disconnects a remote session.
As desktopSessionsExt requires an ipn/desktop.SessionManager, we register it with tsd.System
for the tailscaled subprocess on Windows.
We also fix a bug in the sessionWatcher implementation where it attempts to close a nil channel on stop.
Updates #14823
Updates tailscale/corp#26247
Signed-off-by: Nick Khyl <nickk@tailscale.com>
Introduce new TaildropTargetStatus in PeerStatus
Refactor getTargetStableID to solely rely on Status() instead of calling FileTargets(). This removes a possible race condition between the two calls and provides more detailed failure information if a peer can't receive files.
Updates tailscale/tailscale#14393
Signed-off-by: kari-ts <kari@tailscale.com>
In this PR, we further refactor LocalBackend and Unattended Mode to extract the logic that determines
which profile should be used at the time of the check, such as when a LocalAPI client connects or disconnects.
We then update (*LocalBackend).switchProfileLockedOnEntry to to switch to the profile returned by
(*LocalBackend).resolveBestProfileLocked() rather than to the caller-specified specified profile, and rename it
to switchToBestProfileLockedOnEntry.
This is done in preparation for updating (*LocalBackend).getBackgroundProfileIDLocked to support Always-On
mode by determining which profile to use based on which users, if any, are currently logged in and have an active
foreground desktop session.
Updates #14823
Updates tailscale/corp#26247
Signed-off-by: Nick Khyl <nickk@tailscale.com>
Currently, we disconnect Tailscale and reset LocalBackend on Windows when the last LocalAPI client
disconnects, unless Unattended Mode is enabled for the current profile. And the implementation
is somewhat racy since the current profile could theoretically change after
(*ipnserver.Server).addActiveHTTPRequest checks (*LocalBackend).InServerMode() and before it calls
(*LocalBackend).SetCurrentUser(nil) (or, previously, (*LocalBackend).ResetForClientDisconnect).
Additionally, we might want to keep Tailscale running and connected while a user is logged in
rather than tying it to whether a LocalAPI client is connected (i.e., while the GUI is running),
even when Unattended Mode is disabled for a profile. This includes scenarios where the new
AlwaysOn mode is enabled, as well as when Tailscale is used on headless Windows editions,
such as Windows Server Core, where the GUI is not supported. It may also be desirable to switch
to the "background" profile when a user logs off from their device or implement other similar
features.
To facilitate these improvements, we move the logic from ipnserver.Server to ipnlocal.LocalBackend,
where it determines whether to keep Tailscale running when the current user disconnects.
We also update the logic that determines whether a connection should be allowed to better reflect
the fact that, currently, LocalAPI connections are not allowed unless:
- the current UID is "", meaning that either we are not on a multi-user system or Tailscale is idle;
- the LocalAPI client belongs to the current user (their UIDs are the same);
- the LocalAPI client is Local System (special case; Local System is always allowed).
Whether Unattended Mode is enabled only affects the error message returned to the Local API client
when the connection is denied.
Updates #14823
Signed-off-by: Nick Khyl <nickk@tailscale.com>
There’s (*LocalBackend).ResetForClientDisconnect, and there’s also (*LocalBackend).resetForProfileChangeLockedOnEntry.
Both methods essentially did the same thing but in slightly different ways. For example, resetForProfileChangeLockedOnEntry didn’t reset the control client until (*LocalBackend).Start() was called at the very end and didn’t reset the keyExpired flag, while ResetForClientDisconnect didn’t reinitialize TKA.
Since SetCurrentUser can be called with a nil argument to reset the currently connected user and internally calls resetForProfileChangeLockedOnEntry, we can remove ResetForClientDisconnect and let SetCurrentUser and resetForProfileChangeLockedOnEntry handle it.
Updates #14823
Signed-off-by: Nick Khyl <nickk@tailscale.com>
In this PR, we move the code that checks the AlwaysOn policy from ipnserver.actor to ipnauth.
It is intended to be used by ipnauth.Actor implementations, and we temporarily make it exported
while these implementations reside in ipnserver and in corp. We'll unexport it later.
We also update [ipnauth.Actor.CheckProfileAccess] to accept an auditLogger, which is called
to write details about the action to the audit log when required by the policy, and update
LocalBackend.EditPrefsAs to use an auditLogger that writes to the regular backend log.
Updates tailscale/corp#26146
Signed-off-by: Nick Khyl <nickk@tailscale.com>
Without adding this, the packet filter rejects traffic to VIP service
addresses before checking the filters sent in the netmap.
Fixestailscale/corp#26241
Change-Id: Idd54448048e9b786cf4873fd33b3b21e03d3ad4c
Signed-off-by: Adrian Dewhurst <adrian@tailscale.com>
