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2025-10-16all: use a consistent capitalisation for "Tailnet Lock"Alex Chan1-1/+1
Updates https://github.com/tailscale/corp/issues/13108 Signed-off-by: Alex Chan <alexc@tailscale.com>
2025-10-07ipn/localapi: dead code eliminate unreachable/useless LocalAPI handlers when ↵Brad Fitzpatrick1-52/+59
disabled Saves ~94 KB from the min build. Updates #12614 Change-Id: I3b0b8a47f80b9fd3b1038c2834b60afa55bf02c2 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-10-06feature/featuretags: make usermetrics modularBrad Fitzpatrick1-1/+3
Saves ~102 KB from the min build. Updates #12614 Change-Id: Ie1d4f439321267b9f98046593cb289ee3c4d6249 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-10-06all: use buildfeatures consts in a few more placesBrad Fitzpatrick1-3/+7
Saves ~25 KB. Updates #12614 Change-Id: I7b976e57819a0d2692824d779c8cc98033df0d30 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-10-02feature/featuretags: add features for c2n, peerapi, advertise/use ↵Brad Fitzpatrick1-5/+19
routes/exit nodes Saves 262 KB so far. I'm sure I missed some places, but shotizam says these were the low hanging fruit. Updates #12614 Change-Id: Ia31c01b454f627e6d0470229aae4e19d615e45e3 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-10-02feature/featuretags: make clientmetrics optionalBrad Fitzpatrick1-0/+5
Saves 57 KB Updates #12614 Change-Id: If7eebec12b3cb30ae6264171d36a258c04b05a70 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-10-02appc,*: publish events for route updates and storage (#17392)M. J. Fromberger1-2/+2
Add and wire up event publishers for these two event types in the AppConnector. Nothing currently subscribes to them, so this is harmless. Subscribers for these events will be added in a near-future commit. As part of this, move the appc.RouteInfo type to the types/appctype package. It does not contain any package-specific details from appc. Beside it, add appctype.RouteUpdate to carry route update event state, likewise not specific to appc. Update all usage of the appc.* types throughout to use appctype.* instead, and update depaware files to reflect these changes. Add a Close method to the AppConnector to make sure the client gets cleaned up when the connector is dropped (we re-create connectors). Update the unit tests in the appc package to also check the events published alongside calls to the RouteAdvertiser. For now the tests still rely on the RouteAdvertiser for correctness; this is OK for now as the two methods are always performed together. In the near future, we need to rework the tests so not require that, but that will require building some more test fixtures that we can handle separately. Updates #15160 Updates #17192 Change-Id: I184670ba2fb920e0d2cb2be7c6816259bca77afe Signed-off-by: M. J. Fromberger <fromberger@tailscale.com>
2025-09-30feature/appconnectors: start making it modularBrad Fitzpatrick1-6/+17
Saves 45 KB. Updates #12614 Change-Id: Iaeb73e69633878ce0a0f58c986024784bbe218f1 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-09-30feature/featuretags: add a catch-all "Debug" feature flagBrad Fitzpatrick1-430/+6
Saves 168 KB. Updates #12614 Change-Id: Iaab3ae3efc6ddc7da39629ef13e5ec44976952ba Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-09-30feature/featuretags: add option to turn off DNSBrad Fitzpatrick1-0/+8
Saves 328 KB (2.5%) off the minimal binary. For IoT devices that don't need MagicDNS (e.g. they don't make outbound connections), this provides a knob to disable all the DNS functionality. Rather than a massive refactor today, this uses constant false values as a deadcode sledgehammer, guided by shotizam to find the largest DNS functions which survived deadcode. A future refactor could make it so that the net/dns/resolver and publicdns packages don't even show up in the import graph (along with their imports) but really it's already pretty good looking with just these consts, so it's not at the top of my list to refactor it more soon. Also do the same in a few places with the ACME (cert) functionality, as I saw those while searching for DNS stuff. Updates #12614 Change-Id: I8e459f595c2fde68ca16503ff61c8ab339871f97 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-09-29feature/clientupdate: move clientupdate to a modular feature, disabled for tsnetBrad Fitzpatrick1-35/+2
Updates #12614 Change-Id: I5f685dec84a5396b7c2b66f2788ae3d286e1ddc6 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-09-29cmd/tailscale/cli,client,ipn: add appc-routes cli commandFran Bull1-0/+20
Allow the user to access information about routes an app connector has learned, such as how many routes for each domain. Fixes tailscale/corp#32624 Signed-off-by: Fran Bull <fran@tailscale.com>
2025-09-29feature/logtail: pull logtail + netlog out to modular featuresBrad Fitzpatrick1-0/+10
Removes 434 KB from the minimal Linux binary, or ~3%. Primarily this comes from not linking in the zstd encoding code. Fixes #17323 Change-Id: I0a90de307dfa1ad7422db7aa8b1b46c782bfaaf7 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-09-26types/dnstype: delete unused func, move other one to its sole callerBrad Fitzpatrick1-2/+38
The dnstype package is used by tailcfg, which tries to be light and leafy. But it brings in dnstype. So dnstype shouldn't bring in x/net/dns/dnsmessage. Updates #12614 Change-Id: I043637a7ce7fed097e648001f13ca1927a781def Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-09-26doctor: add ts_omit_doctor supportBrad Fitzpatrick1-1/+3
Updates #12614 Change-Id: I84c166c4b99ca75d70abe4087e5ff3f7d90d4bcc Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-09-25various: allow tailscaled shutdown via LocalAPINick Khyl1-0/+37
A customer wants to allow their employees to restart tailscaled at will, when access rights and MDM policy allow it, as a way to fully reset client state and re-create the tunnel in case of connectivity issues. On Windows, the main tailscaled process runs as a child of a service process. The service restarts the child when it exits (or crashes) until the service itself is stopped. Regular (non-admin) users can't stop the service, and allowing them to do so isn't ideal, especially in managed or multi-user environments. In this PR, we add a LocalAPI endpoint that instructs ipnserver.Server, and by extension the tailscaled process, to shut down. The service then restarts the child tailscaled. Shutting down tailscaled requires LocalAPI write access and an enabled policy setting. Updates tailscale/corp#32674 Updates tailscale/corp#32675 Signed-off-by: Nick Khyl <nickk@tailscale.com>
2025-09-16feature/featuretags, all: add ts_omit_acme to disable TLS cert supportBrad Fitzpatrick1-1/+0
I'd started to do this in the earlier ts_omit_server PR but decided to split it into this separate PR. Updates #17128 Change-Id: Ief8823a78d1f7bbb79e64a5cab30a7d0a5d6ff4b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-09-16feature/portmapper: make the portmapper & its debugging tools modularBrad Fitzpatrick1-163/+0
Starting at a minimal binary and adding one feature back... tailscaled tailscale combined (linux/amd64) 30073135 17451704 31543692 omitting everything + 480302 + 10258 + 493896 .. add debugportmapper + 475317 + 151943 + 467660 .. add portmapper + 500086 + 162873 + 510511 .. add portmapper+debugportmapper Fixes #17148 Change-Id: I90bd0e9d1bd8cbe64fa2e885e9afef8fb5ee74b1 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-09-16all: add ts_omit_serve, start making tailscale serve/funnel be modularBrad Fitzpatrick1-86/+0
tailscaled tailscale combined (linux/amd64) 29853147 17384418 31412596 omitting everything + 621570 + 219277 + 554256 .. add serve Updates #17128 Change-Id: I87c2c6c3d3fc2dc026c3de8ef7000a813b41d31c Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-09-12all: add ts_omit_tailnetlock as a start of making it build-time modularBrad Fitzpatrick1-394/+0
Updates #17115 Change-Id: I6b083c0db4c4d359e49eb129d626b7f128f0a9d2 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-09-11feature/drive: start factoring out Taildrive, add ts_omit_drive build tagBrad Fitzpatrick1-123/+0
As of this commit (per the issue), the Taildrive code remains where it was, but in new files that are protected by the new ts_omit_drive build tag. Future commits will move it. Updates #17058 Change-Id: Idf0a51db59e41ae8da6ea2b11d238aefc48b219e Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-09-02util/syspolicy: finish adding ts_omit_syspolicy build tags, testsBrad Fitzpatrick1-50/+0
Fixes #16998 Updates #12614 Change-Id: Idf2b1657898111df4be31f356091b2376d0d7f0b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-08-18ipn/localapi: plumb an event bus through the localapi.Handler (#16892)M. J. Fromberger1-3/+22
Some of the operations of the local API need an event bus to correctly instantiate other components (notably including the portmapper). This commit adds that, and as the parameter list is starting to get a bit long and hard to read, I took the opportunity to move the arguments to a config type. Only a few call sites needed to be updated and this API is not intended for general use, so I did not bother to stage the change. Updates #15160 Updates #16842 Change-Id: I7b057d71161bd859f5acb96e2f878a34c85be0ef Signed-off-by: M. J. Fromberger <fromberger@tailscale.com>
2025-07-21wgengine/magicsock,all: allocate peer relay over disco instead of PeerAPI ↵Jordan Whited1-1/+1
(#16603) Updates tailscale/corp#30583 Updates tailscale/corp#30534 Updates tailscale/corp#30557 Signed-off-by: Dylan Bargatze <dylan@tailscale.com> Signed-off-by: Jordan Whited <jordan@tailscale.com> Co-authored-by: Dylan Bargatze <dylan@tailscale.com>
2025-07-18client/local,cmd/tailscale/cli,ipn/localapi: expose eventbus graph (#16597)Claus Lensbøl1-0/+50
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>
2025-07-16ipn/ipnlocal: sort tailscale debug peer-relay-servers slice (#16579)Jordan Whited1-1/+4
Updates tailscale/corp#30036 Signed-off-by: Jordan Whited <jordan@tailscale.com>
2025-07-16cmd/tailscale/cli,ipn/ipnlocal,wgengine/magicsock: implement tailscale debug ↵Jordan Whited1-0/+6
peer-relay-servers (#16577) Updates tailscale/corp#30036 Signed-off-by: Jordan Whited <jordan@tailscale.com>
2025-07-10ipn/localapi: do not break client on event marshalling errors (#16503)Claus Lensbøl1-1/+15
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>
2025-07-08cmd/tailscale/cli,ipn/ipnlocal: restrict logout when AlwaysOn mode is enabledNick Khyl1-1/+1
In this PR, we start passing a LocalAPI actor to (*LocalBackend).Logout to make it subject to the same access check as disconnects made via tailscale down or the GUI. We then update the CLI to allow `tailscale logout` to accept a reason, similar to `tailscale down`. Updates tailscale/corp#26249 Signed-off-by: Nick Khyl <nickk@tailscale.com>
2025-07-07ipn/{ipnauth,ipnlocal,localapi}: make EditPrefs return an error if changing ↵Nick Khyl1-1/+1
exit node is restricted by policy We extract checkEditPrefsAccessLocked, adjustEditPrefsLocked, and onEditPrefsLocked from the EditPrefs execution path, defining when each step is performed and what behavior is allowed at each stage. Currently, this is primarily used to support Always On mode, to handle the Exit Node enablement toggle, and to report prefs edit metrics. We then use it to enforce Exit Node policy settings by preventing users from setting an exit node and making EditPrefs return an error when an exit node is restricted by policy. This enforcement is also extended to the Exit Node toggle. These changes prepare for supporting Exit Node overrides when permitted by policy and preventing logout while Always On mode is enabled. In the future, implementation of these methods can be delegated to ipnext extensions via the feature hooks. Updates tailscale/corp#29969 Updates tailscale/corp#26249 Signed-off-by: Nick Khyl <nickk@tailscale.com>
2025-06-18ipn/ipnlocal: make pricing restriction message for Tailnet Lock clearerAnton Tolchanov1-0/+5
Fixes tailscale/corp#24417 Signed-off-by: Anton Tolchanov <anton@tailscale.com>
2025-06-11ipn/localapi,client/local: add debug watcher for bus events (#16239)Claus Lensbøl1-37/+100
Updates: #15160 Signed-off-by: Claus Lensbøl <claus@tailscale.com>
2025-06-10cmd/tailscale/cli: add a risk message about rp_filterAnton Tolchanov1-65/+93
We already present a health warning about this, but it is easy to miss on a server when blackholing traffic makes it unreachable. In addition to a health warning, present a risk message when exit node is enabled. Example: ``` $ tailscale up --exit-node=lizard The following issues on your machine will likely make usage of exit nodes impossible: - interface "ens4" has strict reverse-path filtering enabled - interface "tailscale0" has strict reverse-path filtering enabled Please set rp_filter=2 instead of rp_filter=1; see https://github.com/tailscale/tailscale/issues/3310 To skip this warning, use --accept-risk=linux-strict-rp-filter $ ``` Updates #3310 Signed-off-by: Anton Tolchanov <anton@tailscale.com>
2025-05-13ipn/ipnlocal: attach Tailnet Lock status to bugreportsAnton Tolchanov1-0/+9
Fixes tailscale/corp#28524 Signed-off-by: Anton Tolchanov <anton@tailscale.com>
2025-05-09health, ipn/ipnlocal: add metrics for various client events (#15828)Jonathan Nobels1-8/+9
updates tailscale/corp#28092 Adds metrics for various client events: * Enabling an exit node * Enabling a mullvad exit node * Enabling a preferred exit node * Setting WantRunning to true/false * Requesting a bug report ID * Profile counts * Profile deletions * Captive portal detection Signed-off-by: Jonathan Nobels <jonathan@tailscale.com>
2025-04-16feature/taildrop: start moving Taildrop out of LocalBackendBrad Fitzpatrick1-400/+13
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>
2025-04-16net/netmon: publish events to event busDavid Anderson1-1/+4
Updates #15160 Signed-off-by: David Anderson <dave@tailscale.com>
2025-04-16portmapper: update NewClient to use a Config argumentM. J. Fromberger1-11/+17
In preparation for adding more parameters (and later, moving some away), rework the portmapper constructor to accept its arguments on a Config struct rather than positionally. This is a breaking change to the function signature, but one that is very easy to update, and a search of GitHub reveals only six instances of usage outside clones and forks of Tailscale itself, that are not direct copies of the code fixed up here. While we could stub in another constructor, I think it is safe to let those folks do the update in-place, since their usage is already affected by other changes we can't test for anyway. Updates #15160 Change-Id: I9f8a5e12b38885074c98894b7376039261b43f43 Signed-off-by: M. J. Fromberger <fromberger@tailscale.com>
2025-02-04ipn/{ipnserver,localapi},tsnet: use ipnauth.Self as the actor in tsnet ↵Nick Khyl1-4/+3
localapi handlers With #14843 merged, (*localapi.Handler).servePrefs() now requires a non-nil actor, and other places may soon require it as well. In this PR, we update localapi.NewHandler with a new required parameter for the actor. We then update tsnet to use ipnauth.Self. We also rearrange the code in (*ipnserver.Server).serveHTTP() to pass the actor via Handler's constructor instead of the field. Updates #14823 Signed-off-by: Nick Khyl <nickk@tailscale.com>
2025-01-31ipn/ipn{auth,server,local}: initial support for the always-on modeNick Khyl1-1/+1
In this PR, we update LocalBackend to set WantRunning=true when applying policy settings to the current profile's prefs, if the "always-on" mode is enabled. We also implement a new (*LocalBackend).EditPrefsAs() method, which is like EditPrefs but accepts an actor (e.g., a LocalAPI client's identity) that initiated the change. If WantRunning is being set to false, the new EditPrefsAs method checks whether the actor has ipnauth.Disconnect access to the profile and propagates an error if they do not. Finally, we update (*ipnserver.actor).CheckProfileAccess to allow a disconnect only if the "always-on" mode is not enabled by the AlwaysOn policy setting. This is not a comprehensive solution to the "always-on" mode across platforms, as instead of disconnecting a user could achieve the same effect by creating a new empty profile, initiating a reauth, or by deleting the profile. These are the things we should address in future PRs. Updates #14823 Signed-off-by: Nick Khyl <nickk@tailscale.com>
2025-01-30ipn: generate LoginProfileView and use it instead of *LoginProfile where ↵Nick Khyl1-2/+2
appropriate Conventionally, we use views (e.g., ipn.PrefsView, tailcfg.NodeView, etc.) when dealing with structs that shouldn't be mutated. However, ipn.LoginProfile has been an exception so far, with a mix of passing and returning LoginProfile by reference (allowing accidental mutations) and by value (which is wasteful, given its current size of 192 bytes). In this PR, we generate an ipn.LoginProfileView and use it instead of passing/returning LoginProfiles by mutable reference or copying them when passing/returning by value. Now, LoginProfiles can only be mutated by (*profileManager).setProfilePrefs. Updates #14823 Signed-off-by: Nick Khyl <nickk@tailscale.com>
2025-01-24feature/capture: move packet capture to feature/*, out of iOS + CLIBrad Fitzpatrick1-19/+15
We had the debug packet capture code + Lua dissector in the CLI + the iOS app. Now we don't, with tests to lock it in. As a bonus, tailscale.com/net/packet and tailscale.com/net/flowtrack no longer appear in the CLI's binary either. A new build tag ts_omit_capture disables the packet capture code and was added to build_dist.sh's --extra-small mode. Updates #12614 Change-Id: I79b0628c0d59911bd4d510c732284d97b0160f10 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-01-09all: illumos/solaris userspace only supportNahum Shalman1-2/+2
Updates #14565 Change-Id: I743148144938794db0a224873ce76c10dbe6fa5f Signed-off-by: Nahum Shalman <nahamu@gmail.com>
2024-12-31all: add means to set device posture attributes from nodeBrad Fitzpatrick1-0/+28
Updates tailscale/corp#24690 Updates #4077 Change-Id: I05fe799beb1d2a71d1ec3ae08744cc68bcadae2a Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2024-12-04cmd/tailscale,net/netcheck: add debug feature to force preferred DERPJames Tucker1-0/+7
This provides an interface for a user to force a preferred DERP outcome for all future netchecks that will take precedence unless the forced region is unreachable. The option does not persist and will be lost when the daemon restarts. Updates tailscale/corp#18997 Updates tailscale/corp#24755 Signed-off-by: James Tucker <james@tailscale.com>
2024-11-27ipn/localapi: count localapi requests to metric endpointsAnton Tolchanov1-1/+5
Updates tailscale/corp#22075 Signed-off-by: Anton Tolchanov <anton@tailscale.com>
2024-11-07client/tailscale,ipn/{ipnlocal,localapi}: add a pre-shutdown localAPI ↵Irbe Krumina1-0/+17
endpoint that terminates control connections. (#14028) Adds a /disconnect-control local API endpoint that just shuts down control client. This can be run before shutting down an HA subnet router/app connector replica - it will ensure that all connection to control are dropped and control thus considers this node inactive and tells peers to switch over to another replica. Meanwhile the existing connections keep working (assuming that the replica is given some graceful shutdown period). Updates tailscale/tailscale#14020 Signed-off-by: Irbe Krumina <irbe@tailscale.com>
2024-10-31cmd/tailscale/cli, client/tailscale, ipn/localapi: add tailscale syspolicy ↵Nick Khyl1-0/+50
{list,reload} commands In this PR, we add the tailscale syspolicy command with two subcommands: list, which displays policy settings, and reload, which forces a reload of those settings. We also update the LocalAPI and LocalClient to facilitate these additions. Updates #12687 Signed-off-by: Nick Khyl <nickk@tailscale.com>
2024-10-29cmd/tailscale/cli: add 'tailscale metrics' commandAnton Tolchanov1-9/+2
- `tailscale metrics print`: to show metric values in console - `tailscale metrics write`: to write metrics to a file (with a tempfile & rename dance, which is atomic on Unix). Also, remove the `TS_DEBUG_USER_METRICS` envknob as we are getting more confident in these metrics. Updates tailscale/corp#22075 Signed-off-by: Anton Tolchanov <anton@tailscale.com>
2024-10-18ipn/{ipnauth,ipnlocal,ipnserver}: send the auth URL to the user who started ↵Nick Khyl1-2/+2
interactive login We add the ClientID() method to the ipnauth.Actor interface and updated ipnserver.actor to implement it. This method returns a unique ID of the connected client if the actor represents one. It helps link a series of interactions initiated by the client, such as when a notification needs to be sent back to a specific session, rather than all active sessions, in response to a certain request. We also add LocalBackend.WatchNotificationsAs and LocalBackend.StartLoginInteractiveAs methods, which are like WatchNotifications and StartLoginInteractive but accept an additional parameter specifying an ipnauth.Actor who initiates the operation. We store these actor identities in watchSession.owner and LocalBackend.authActor, respectively,and implement LocalBackend.sendTo and related helper methods to enable sending notifications to watchSessions associated with actors (or, more broadly, identifiable recipients). We then use the above to change who receives the BrowseToURL notifications: - For user-initiated, interactive logins, the notification is delivered only to the user who initiated the process. If the initiating actor represents a specific connected client, the URL notification is sent back to the same LocalAPI client that called StartLoginInteractive. Otherwise, the notification is sent to all clients connected as that user. Currently, we only differentiate between users on Windows, as it is inherently a multi-user OS. - In all other cases (e.g., node key expiration), we send the notification to all connected users. Updates tailscale/corp#18342 Signed-off-by: Nick Khyl <nickk@tailscale.com>
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