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2025-09-02util/syspolicy: finish plumbing policyclient, add feature/syspolicy, move ↵Brad Fitzpatrick1-13/+7
global impl This is step 4 of making syspolicy a build-time feature. This adds a policyclient.Get() accessor to return the correct implementation to use: either the real one, or the no-op one. (A third type, a static one for testing, also exists, so in general a policyclient.Client should be plumbed around and not always fetched via policyclient.Get whenever possible, especially if tests need to use alternate syspolicy) Updates #16998 Updates #12614 Change-Id: Iaf19670744a596d5918acfa744f5db4564272978 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-09-02util/syspolicy/{setting,ptype}: move PreferenceOption and Visibility to new ↵Brad Fitzpatrick1-0/+1
leaf package Step 3 in the series. See earlier cc532efc2000 and d05e6dc09e. This step moves some types into a new leaf "ptype" package out of the big "settings" package. The policyclient.Client will later get new methods to return those things (as well as Duration and Uint64, which weren't done at the time of the earlier prototype). Updates #16998 Updates #12614 Change-Id: I4d72d8079de3b5351ed602eaa72863372bd474a2 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-09-01util/syspolicy/policyclient: add policyclient.Client interface, start plumbingBrad Fitzpatrick1-0/+1
This is step 2 of ~4, breaking up #14720 into reviewable chunks, with the aim to make syspolicy be a build-time configurable feature. Step 1 was #16984. In this second step, the util/syspolicy/policyclient package is added with the policyclient.Client interface. This is the interface that's always present (regardless of build tags), and is what code around the tree uses to ask syspolicy/MDM questions. There are two implementations of policyclient.Client for now: 1) NoPolicyClient, which only returns default values. 2) the unexported, temporary 'globalSyspolicy', which is implemented in terms of the global functions we wish to later eliminate. This then starts to plumb around the policyclient.Client to most callers. Future changes will plumb it more. When the last of the global func callers are gone, then we can unexport the global functions and make a proper policyclient.Client type and constructor in the syspolicy package, removing the globalSyspolicy impl out of tsd. The final change will sprinkle build tags in a few more places and lock it in with dependency tests to make sure the dependencies don't later creep back in. Updates #16998 Updates #12614 Change-Id: Ib2c93d15c15c1f2b981464099177cd492d50391c Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-08-31util/syspolicy/*: move syspolicy keys to new const leaf "pkey" packageBrad Fitzpatrick1-0/+1
This is step 1 of ~3, breaking up #14720 into reviewable chunks, with the aim to make syspolicy be a build-time configurable feature. In this first (very noisy) step, all the syspolicy string key constants move to a new constant-only (code-free) package. This will make future steps more reviewable, without this movement noise. There are no code or behavior changes here. The future steps of this series can be seen in #14720: removing global funcs from syspolicy resolution and using an interface that's plumbed around instead. Then adding build tags. Updates #12614 Change-Id: If73bf2c28b9c9b1a408fe868b0b6a25b03eeabd1 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-08-26go.toolchain.branch: bump to go1.25 (#16954)Patrick O'Doherty1-4/+15
go.toolchain.rev: bump go1.25 version flake.nix: bump Go to 1.25 Updates #16330 Signed-off-by: Patrick O'Doherty <patrick@tailscale.com>
2025-08-05.github/workflows: enforce github action version pinning (#16768)Andrew Lytvynov1-0/+1
Use https://github.com/stacklok/frizbee via the new `go tool` support from Go 1.24. Updates https://github.com/tailscale/corp/issues/31017 Signed-off-by: Andrew Lytvynov <awly@tailscale.com>
2025-06-17derp/derphttp: add error notify for RunWatchConnectionLoop (#16261)Mike O'Driscoll1-1/+2
The caller of client.RunWatchConnectionLoop may need to be aware of errors that occur within loop. Add a channel that notifies of errors to the caller to allow for decisions to be make as to the state of the client. Updates tailscale/corp#25756 Signed-off-by: Mike O'Driscoll <mikeo@tailscale.com>
2025-06-13client/local: use an iterator to stream bus events (#16269)M. J. Fromberger1-1/+1
This means the caller does not have to remember to close the reader, and avoids having to duplicate the logic to decode JSON into events. Updates #15160 Change-Id: I20186fabb02f72522f61d5908c4cc80b86b8936b Signed-off-by: M. J. Fromberger <fromberger@tailscale.com>
2025-06-10cmd/{derp,derpprobe},prober,derp: add mesh support to derpprobe (#15414)Mike O'Driscoll1-1/+1
Add mesh key support to derpprobe for probing derpers with verify set to true. Move MeshKey checking to central point for code reuse. Fix a bad error fmt msg. Fixes tailscale/corp#27294 Fixes tailscale/corp#25756 Signed-off-by: Mike O'Driscoll <mikeo@tailscale.com>
2025-05-29net/tshttpproxy: fix WDAP/PAC proxy detection on Win10 1607 and earlierNick Khyl1-1/+1
Using WINHTTP_AUTOPROXY_ALLOW_AUTOCONFIG on Windows versions older than Windows 10 1703 (build 15063) is not supported and causes WinHttpGetProxyForUrl to fail with ERROR_INVALID_PARAMETER. This results in failures reaching the control on environments where a proxy is required. We use wingoes version detection to conditionally set the WINHTTP_AUTOPROXY_ALLOW_AUTOCONFIG flag on Windows builds greater than 15063. While there, we also update proxy detection to use WINHTTP_AUTO_DETECT_TYPE_DNS_A, as DNS-based proxy discovery might be required with Active Directory and in certain other environments. Updates tailscale/corp#29168 Fixes #879 Signed-off-by: Nick Khyl <nickk@tailscale.com>
2025-05-22cmd/derper: fix mesh auth for DERP servers (#16061)Simon Law2-56/+1
To authenticate mesh keys, the DERP servers used a simple == comparison, which is susceptible to a side channel timing attack. By extracting the mesh key for a DERP server, an attacker could DoS it by forcing disconnects using derp.Client.ClosePeer. They could also enumerate the public Wireguard keys, IP addresses and ports for nodes connected to that DERP server. DERP servers configured without mesh keys deny all such requests. This patch also extracts the mesh key logic into key.DERPMesh, to prevent this from happening again. Security bulletin: https://tailscale.com/security-bulletins#ts-2025-003 Fixes tailscale/corp#28720 Signed-off-by: Simon Law <sfllaw@tailscale.com>
2025-05-19cmd/derper, net/tlsdial: fix client's self-signed cert validationBrad Fitzpatrick2-0/+2
This fixes the implementation and test from #15208 which apparently never worked. Ignore the metacert when counting the number of expected certs presented. And fix the test, pulling out the TLSConfig setup code into something shared between the real cmd/derper and the test. Fixes #15579 Change-Id: I90526e38e59f89b480629b415f00587b107de10a Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-04-28tsweb/varz: export GC CPU fraction gaugeJames Tucker1-1/+1
We were missing this metric, but it can be important for some workloads. Varz memstats output allocation cost reduced from 30 allocs per invocation to 1 alloc per invocation. Updates tailscale/corp#28033 Signed-off-by: James Tucker <james@tailscale.com> Co-authored-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-04-16net/netmon: publish events to event busDavid Anderson1-1/+2
Updates #15160 Signed-off-by: David Anderson <dave@tailscale.com>
2025-04-08net/{netx,memnet},all: add netx.DialFunc, move memnet Network implBrad Fitzpatrick1-0/+1
This adds netx.DialFunc, unifying a type we have a bazillion other places, giving it now a nice short name that's clickable in editors, etc. That highlighted that my earlier move (03b47a55c7956) of stuff from nettest into netx moved too much: it also dragged along the memnet impl, meaning all users of netx.DialFunc who just wanted netx for the type definition were instead also pulling in all of memnet. So move the memnet implementation netx.Network into memnet, a package we already had. Then use netx.DialFunc in a bunch of places. I'm sure I missed some. And plenty remain in other repos, to be updated later. Updates tailscale/corp#27636 Change-Id: I7296cd4591218e8624e214f8c70dab05fb884e95 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-03-18tsweb: split promvarz into an optional dependencyDavid Anderson2-6/+10
Allows the use of tsweb without pulling in all of the heavy prometheus client libraries, protobuf and so on. Updates #15160 Signed-off-by: David Anderson <dave@tailscale.com>
2025-03-07cmd/derper, derp/derphttp: support, generate self-signed IP address certsBrad Fitzpatrick2-1/+174
For people who can't use LetsEncrypt because it's banned. Per https://github.com/tailscale/tailscale/issues/11776#issuecomment-2520955317 This does two things: 1) if you run derper with --certmode=manual and --hostname=$IP_ADDRESS we previously permitted, but now we also: * auto-generate the self-signed cert for you if it doesn't yet exist on disk * print out the derpmap configuration you need to use that self-signed cert 2) teaches derp/derphttp's derp dialer to verify the signature of self-signed TLS certs, if so declared in the existing DERPNode.CertName field, which previously existed for domain fronting, separating out the dial hostname from how certs are validates, so it's not overloaded much; that's what it was meant for. Fixes #11776 Change-Id: Ie72d12f209416bb7e8325fe0838cd2c66342c5cf Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-03-04cmd/derper: add --home flag to control home page behaviorBrad Fitzpatrick1-13/+39
Updates #12897 Change-Id: I7e9c8de0d2daf92cc32e9f6121bc0874c6672540 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-02-25cmd/derper: add --socket flag to change unix socket path to tailscaledBrad Fitzpatrick1-0/+4
Fixes #10359 Change-Id: Ide49941c486d29856841016686827316878c9433 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-02-19go.toolchain.branch: update to Go 1.24 (#15016)Brad Fitzpatrick1-28/+54
* go.toolchain.branch: update to Go 1.24 Updates #15015 Change-Id: I29c934ec17e60c3ac3264f30fbbe68fc21422f4d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com> * cmd/testwrapper: fix for go1.24 Updates #15015 Signed-off-by: Paul Scott <paul@tailscale.com> * go.mod,Dockerfile: bump to Go 1.24 Also bump golangci-lint to a version that was built with 1.24 Updates #15015 Signed-off-by: Andrew Lytvynov <awly@tailscale.com> --------- Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com> Signed-off-by: Paul Scott <paul@tailscale.com> Signed-off-by: Andrew Lytvynov <awly@tailscale.com> Co-authored-by: Paul Scott <paul@tailscale.com> Co-authored-by: Andrew Lytvynov <awly@tailscale.com>
2025-02-19various: disable MPTCP when setting TCP_USER_TIMEOUT sockopt (#15063)Andrew Lytvynov1-0/+3
There's nothing about it on https://github.com/multipath-tcp/mptcp_net-next/issues/ but empirically MPTCP doesn't support this option on awly's kernel 6.13.2 and in GitHub actions. Updates #15015 Signed-off-by: Andrew Lytvynov <awly@tailscale.com>
2025-02-06cmd/derper: support no mesh key (#14931)Mike O'Driscoll1-0/+2
Incorrect disabled support for not having a mesh key in d5316a4fbb4a1105ce2ba6f92d9688452b7747cd Allow for no mesh key to be set. Fixes #14928 Signed-off-by: Mike O'Driscoll <mikeo@tailscale.com>
2025-02-06cmd/derper: close setec after use (#14929)Mike O'Driscoll1-0/+1
Since dynamic reload of setec is not supported in derper at this time, close the server after the secret is loaded. Updates tailscale/corp#25756 Signed-off-by: Mike O'Driscoll <mikeo@tailscale.com>
2025-02-05all: use new LocalAPI client package locationBrad Fitzpatrick1-1/+1
It was moved in f57fa3cbc30e. Updates tailscale/corp#22748 Change-Id: I19f965e6bded1d4c919310aa5b864f2de0cd6220 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-02-05client,localclient: move localclient.go to client/local packagePercy Wegmann1-13/+14
Updates tailscale/corp#22748 Signed-off-by: Percy Wegmann <percy@tailscale.com>
2025-02-05cmd/derper: remove logging of mesh key (#14915)Mike O'Driscoll1-1/+2
A previous PR accidentally logged the key as part of an error. Remove logging of the key. Add log print for Setec store steup. Updates tailscale/corp#25756 Signed-off-by: Mike O'Driscoll <mikeo@tailscale.com>
2025-02-05cmd/derper: add setec secret support (#14890)Mike O'Driscoll3-7/+109
Add setec secret support for derper. Support dev mode via env var, and setec via secrets URL. For backwards compatibility use setec load from file also. Updates tailscale/corp#25756 Signed-off-by: Mike O'Driscoll <mikeo@tailscale.com>
2025-01-26go.mod: bump depaware, add --internal flag to stop hiding internal packagesBrad Fitzpatrick1-0/+59
The hiding of internal packages has hidden things I wanted to see a few times now. Stop hiding them. This makes depaware.txt output a bit longer, but not too much. Plus we only really look at it with diffs & greps anyway; it's not like anybody reads the whole thing. Updates #12614 Change-Id: I868c89eeeddcaaab63e82371651003629bc9bda8 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-01-24cmd/derper,derp: make TCP write timeout configurablePercy Wegmann1-0/+3
The timeout still defaults to 2 seconds, but can now be changed via command-line flag. Updates tailscale/corp#26045 Signed-off-by: Percy Wegmann <percy@tailscale.com>
2025-01-21ipn/ipnlocal: also use LetsEncrypt-baked-in roots for cert validationBrad Fitzpatrick1-0/+1
We previously baked in the LetsEncrypt x509 root CA for our tlsdial package. This moves that out into a new "bakedroots" package and is now also shared by ipn/ipnlocal's cert validation code (validCertPEM) that decides whether it's time to fetch a new cert. Otherwise, a machine without LetsEncrypt roots locally in its system roots is unable to use tailscale cert/serve and fetch certs. Fixes #14690 Change-Id: Ic88b3bdaabe25d56b9ff07ada56a27e3f11d7159 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-01-17go.{mod,sum},cmd/{k8s-operator,derper,stund}/depaware.txt: bump kube deps ↵Irbe Krumina1-2/+2
(#14601) Updates kube deps and mkctr, regenerates kube yamls with the updated tooling. Updates#cleanup Signed-off-by: Irbe Krumina <irbe@tailscale.com>
2025-01-15atomicfile: use ReplaceFile on Windows so that attributes and ACLs are preservedAaron Klotz1-1/+1
I moved the actual rename into separate, GOOS-specific files. On non-Windows, we do a simple os.Rename. On Windows, we first try ReplaceFile with a fallback to os.Rename if the target file does not exist. ReplaceFile is the recommended way to rename the file in this use case, as it preserves attributes and ACLs set on the target file. Updates #14428 Signed-off-by: Aaron Klotz <aaron@tailscale.com>
2025-01-15cmd/derper: support explicit configuration of mesh dial hostsPercy Wegmann2-31/+28
The --mesh-with flag now supports the specification of hostname tuples like derp1a.tailscale.com/derp1a-vpc.tailscale.com, which instructs derp to mesh with host 'derp1a.tailscale.com' but dial TCP connections to 'derp1a-vpc.tailscale.com'. For backwards compatibility, --mesh-with still supports individual hostnames. The logic which attempts to auto-discover '[host]-vpc.tailscale.com' dial hosts has been removed. Updates tailscale/corp#25653 Signed-off-by: Percy Wegmann <percy@tailscale.com>
2025-01-14go.mod: bump mdlayher/netlink and u-root/uio to use Go 1.21 NativeEndianBrad Fitzpatrick1-2/+1
This finishes the work started in #14616. Updates #8632 Change-Id: I4dc07d45b1e00c3db32217c03b21b8b1ec19e782 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-01-07cmd/derper: improve logging on derp mesh connectJames Tucker1-3/+7
Include the mesh log prefix in all mesh connection setup. Updates tailscale/corp#25653 Signed-off-by: James Tucker <james@tailscale.com>
2024-12-16Switch logging service from log.tailscale.io to log.tailscale.com (#14398)Joe Tsai1-6/+6
Updates tailscale/corp#23617 Signed-off-by: Joe Tsai <joetsai@digital-static.net>
2024-12-05cmd/derper: allow absent SNI when using manual certs and IP literal for hostnameBrad Fitzpatrick4-7/+108
Updates #11776 Change-Id: I81756415feb630da093833accc3074903ebd84a7 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2024-11-20tsweb: change RequestID format to have a date in itBrad Fitzpatrick2-4/+3
So we can locate them in logs more easily. Updates tailscale/corp#24721 Change-Id: Ia766c75608050dde7edc99835979a6e9bb328df2 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2024-11-07derp/derphttp: don't link websockets other than on GOOS=jsBrad Fitzpatrick1-1/+1
Or unless the new "ts_debug_websockets" build tag is set. Updates #1278 Change-Id: Ic4c4f81c1924250efd025b055585faec37a5491d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2024-11-06cmd/derper: show more information on home pagePercy Wegmann3-19/+92
- Basic description of DERP If configured to do so, also show - Mailto link to security@tailscale.com - Link to Tailscale Security Policies - Link to Tailscale Acceptable Use Policy Updates tailscale/corp#24092 Signed-off-by: Percy Wegmann <percy@tailscale.com>
2024-11-05types/result, util/lineiter: add package for a result type, use itBrad Fitzpatrick1-1/+2
This adds a new generic result type (motivated by golang/go#70084) to try it out, and uses it in the new lineutil package (replacing the old lineread package), changing that package to return iterators: sometimes over []byte (when the input is all in memory), but sometimes iterators over results of []byte, if errors might happen at runtime. Updates #12912 Updates golang/go#70084 Change-Id: Iacdc1070e661b5fb163907b1e8b07ac7d51d3f83 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2024-10-25util/syspolicy, ipn/ipnlocal: update syspolicy package to utilize syspolicy/rsopNick Khyl1-5/+10
In this PR, we update the syspolicy package to utilize syspolicy/rsop under the hood, and remove syspolicy.CachingHandler, syspolicy.windowsHandler and related code which is no longer used. We mark the syspolicy.Handler interface and RegisterHandler/SetHandlerForTest functions as deprecated, but keep them temporarily until they are no longer used in other repos. We also update the package to register setting definitions for all existing policy settings and to register the Registry-based, Windows-specific policy stores when running on Windows. Finally, we update existing internal and external tests to use the new API and add a few more tests and benchmarks. Updates #12687 Signed-off-by: Nick Khyl <nickk@tailscale.com>
2024-10-19net/tlsdial: call out firewalls blocking Tailscale in health warnings (#13840)Andrea Gottardo1-0/+1
Updates tailscale/tailscale#13839 Adds a new blockblame package which can detect common MITM SSL certificates used by network appliances. We use this in `tlsdial` to display a dedicated health warning when we cannot connect to control, and a network appliance MITM attack is detected. Signed-off-by: Andrea Gottardo <andrea@gottardo.me>
2024-10-08util/syspolicy, ipn: add "tailscale debug component-logs" supportNick Khyl1-1/+2
Fixes #13313 Fixes #12687 Signed-off-by: Nick Khyl <nickk@tailscale.com>
2024-09-24cli: add `tailscale dns query` (#13368)Andrea Gottardo1-1/+1
Updates tailscale/tailscale#13326 Adds a CLI subcommand to perform DNS queries using the internal DNS forwarder and observe its internals (namely, which upstream resolvers are being used). Signed-off-by: Andrea Gottardo <andrea@gottardo.me>
2024-09-08kube,cmd/{k8s-operator,containerboot},envknob,ipn/store/kubestore,*/depaware ↵Irbe Krumina1-1/+1
.txt: rename packages (#13418) Rename kube/{types,client,api} -> kube/{kubetypes,kubeclient,kubeapi} so that we don't need to rename the package on each import to convey that it's kubernetes specific. Updates#cleanup Signed-off-by: Irbe Krumina <irbe@tailscale.com>
2024-09-08kube,cmd/{k8s-operator,containerboot},envknob,ipn/store/kubestore,*/depaware ↵Irbe Krumina1-1/+1
.txt: split out kube types (#13417) Further split kube package into kube/{client,api,types}. This is so that consumers who only need constants/static types don't have to import the client and api bits. Updates#cleanup Signed-off-by: Irbe Krumina <irbe@tailscale.com>
2024-09-08cmd/k8s-operator,kube: set app name for Kubernetes Operator proxies (#13410)Irbe Krumina1-0/+1
Updates tailscale/corp#22920 Signed-off-by: Irbe Krumina <irbe@tailscale.com>
2024-08-27usermetric: add initial user-facing metricsKristoffer Dalby1-0/+1
This commit adds a new usermetric package and wires up metrics across the tailscale client. Updates tailscale/corp#22075 Co-authored-by: Anton Tolchanov <anton@tailscale.com> Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
2024-08-27tsweb/varz: remove pprofKristoffer Dalby1-1/+1
Updates tailscale/corp#22075 Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>
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