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2025-10-02control/controlclient: optimize zstd decode of KeepAlive messagesBrad Fitzpatrick1-0/+38
Maybe it matters? At least globally across all nodes? Fixes #17343 Change-Id: I3f61758ea37de527e16602ec1a6e453d913b3195 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-09-19ipn/ipnlocal: add a C2N endpoint for fetching a netmapAnton Tolchanov1-0/+26
For debugging purposes, add a new C2N endpoint returning the current netmap. Optionally, coordination server can send a new "candidate" map response, which the client will generate a separate netmap for. Coordination server can later compare two netmaps, detecting unexpected changes to the client state. Updates tailscale/corp#32095 Signed-off-by: Anton Tolchanov <anton@tailscale.com>
2025-09-16health,ipn/ipnlocal: introduce eventbus in heath.Tracker (#17085)Claus Lensbøl1-2/+3
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>
2025-07-28health: add an ETag to UnhealthyState for change detectionJames Sanderson1-2/+2
Updates tailscale/corp#30596 Signed-off-by: James Sanderson <jsanderson@tailscale.com>
2025-06-09health: prefix Warnables received from the control planeJames Sanderson1-6/+6
Updates tailscale/corp#27759 Signed-off-by: James Sanderson <jsanderson@tailscale.com>
2025-05-30controlclient,health,ipnlocal,tailcfg: add DisplayMessage supportJames Sanderson1-1/+237
Updates tailscale/corp#27759 Signed-off-by: James Sanderson <jsanderson@tailscale.com>
2025-05-22control/controlclient,health,tailcfg: refactor control health messages (#15839)James 'zofrex' Sanderson1-14/+28
* control/controlclient,health,tailcfg: refactor control health messages Updates tailscale/corp#27759 Signed-off-by: James Sanderson <jsanderson@tailscale.com> Signed-off-by: Paul Scott <408401+icio@users.noreply.github.com> Co-authored-by: Paul Scott <408401+icio@users.noreply.github.com>
2025-04-29control/controlclient,health: add tests for control health trackingJames Sanderson1-0/+32
Updates tailscale/corp#27759 Signed-off-by: James Sanderson <jsanderson@tailscale.com>
2025-01-15tailcfg,control/controlclient: treat nil AllowedIPs as Addresses [capver 112]Brad Fitzpatrick1-0/+32
Updates #14635 Change-Id: I21e2bd1ec4eb384eb7a3fc8379f0788a684893f3 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-01-14all: add Node.HomeDERP int, phase out "127.3.3.40:$region" hack [capver 111]Brad Fitzpatrick1-18/+65
This deprecates the old "DERP string" packing a DERP region ID into an IP:port of 127.3.3.40:$REGION_ID and just uses an integer, like PeerChange.DERPRegion does. We still support servers sending the old form; they're converted to the new form internally right when they're read off the network. Updates #14636 Change-Id: I9427ec071f02a2c6d75ccb0fcbf0ecff9f19f26f Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2025-01-03control/controlclient: remove optimization that was more convoluted than usefulBrad Fitzpatrick1-7/+6
While working on #13390, I ran across this non-idiomatic pointer-to-view and parallel-sorted-map accounting code that was all just to avoid a sort later. But the sort later when building a new netmap.NetworkMap is already a drop in the bucket of CPU compared to how much work & allocs mapSession.netmap and LocalBackend's spamming of the full netmap (potentially tens of thousands of peers, MBs of JSON) out to IPNBus clients for any tiny little change (node changing online status, etc). Removing the parallel sorted slice let everything be simpler to reason about, so this does that. The sort might take a bit more CPU time now in theory, but in practice for any netmap size for which it'd matter, the quadratic netmap IPN bus spam (which we need to fix soon) will overshadow that little sort. Updates #13390 Updates #1909 Change-Id: I3092d7c67dc10b2a0f141496fe0e7e98ccc07712 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2024-04-16all: use Go 1.22 range-over-intBrad Fitzpatrick1-2/+2
Updates #11058 Change-Id: I35e7ef9b90e83cac04ca93fd964ad00ed5b48430 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2024-03-24all: deprecate Node.Capabilities (more), remove PeerChange.Capabilities ↵Brad Fitzpatrick1-29/+1
[capver 89] First we had Capabilities []string. Then https://tailscale.com/blog/acl-grants (#4217) brought CapMap, a superset of Capabilities. Except we never really finished the transition inside the codebase to go all-in on CapMap. This does so. Notably, this coverts Capabilities on the wire early to CapMap internally so the code can only deal in CapMap, even against an old control server. In the process, this removes PeerChange.Capabilities support, which no known control plane sent anyway. They can and should use PeerChange.CapMap instead. Updates #11508 Updates #4217 Change-Id: I872074e226b873f9a578d9603897b831d50b25d9 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2024-03-20control/controlclient: do not alias peer CapMapAdrian Dewhurst1-0/+5
Updates #cleanup Change-Id: I10fd5e04310cdd7894a3caa3045b86eb0a06b6a0 Signed-off-by: Adrian Dewhurst <adrian@tailscale.com>
2024-03-19control/controlclient: fix sending peer capmap changes (#11457)Claire Wang1-1/+30
Instead of just checking if a peer capmap is nil, compare the previous state peer capmap with the new peer capmap. Updates tailscale/corp#17516 Signed-off-by: Claire Wang <claire@tailscale.com>
2023-11-17control/controlclient: support incremental packet filter updates [capver 81]Brad Fitzpatrick1-0/+92
Updates #10299 Change-Id: I87e4235c668a1db7de7ef1abc743f0beecb86d3d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2023-10-01tailcfg, all: use []netip.AddrPort instead of []string for EndpointsBrad Fitzpatrick1-11/+22
It's JSON wire compatible. Updates #cleanup Change-Id: Ifa5c17768fec35b305b06d75eb5f0611c8a135a6 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2023-09-18all: declare & plumb IPv6 masquerade address for peerTom DNetto1-0/+12
This PR plumbs through awareness of an IPv6 SNAT/masquerade address from the wire protocol through to the low-level (tstun / wgengine). This PR is the first in two PRs for implementing IPv6 NAT support to/from peers. A subsequent PR will implement the data-plane changes to implement IPv6 NAT - this is just plumbing. Signed-off-by: Tom DNetto <tom@tailscale.com> Updates ENG-991
2023-09-17tailcfg: define a type for NodeCapabilityMaisem Ali1-7/+7
Instead of untyped string, add a type to identify these. Updates #cleanup Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-09-15tailcfg: add DNS address list for IsWireGuardOnly nodesJames Tucker1-0/+35
Tailscale exit nodes provide DNS service over the peer API, however IsWireGuardOnly nodes do not have a peer API, and instead need client DNS parameters passed in their node description. For Mullvad nodes this will contain the in network 10.64.0.1 address. Updates #9377 Signed-off-by: James Tucker <james@tailscale.com>
2023-09-11control/controlknobs, all: add plumbed Knobs type, not global variablesBrad Fitzpatrick1-1/+2
Previously two tsnet nodes in the same process couldn't have disjoint sets of controlknob settings from control as both would overwrite each other's global variables. This plumbs a new controlknobs.Knobs type around everywhere and hangs the knobs sent by control on that instead. Updates #9351 Change-Id: I75338646d36813ed971b4ffad6f9a8b41ec91560 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2023-08-28types/logger: add AsJSONBrad Fitzpatrick1-8/+6
Printing out JSON representation things in log output is pretty common. Updates #cleanup Change-Id: Ife2d2e321a18e6e1185efa8b699a23061ac5e5a4 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2023-08-28control/controlclient: convert PeersChanged nodes to patches internallyBrad Fitzpatrick1-1/+202
So even if the server doesn't support sending patches (neither the Tailscale control server nor Headscale yet do), this makes the client convert a changed node to its diff so the diffs can be processed individually in a follow-up change. This lets us make progress on #1909 without adding a dependency on finishing the server-side part, and also means other control servers will get the same upcoming optimizations. And add some clientmetrics while here. Updates #1909 Change-Id: I9533bcb8bba5227e17389f0b10dff71f33ee54ec Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2023-08-22control/controlclient: remove quadratic allocs in mapSessionBrad Fitzpatrick1-24/+87
The mapSession code was previously quadratic: N clients in a netmap send updates proportional to N and then for each, we do N units of work. This removes most of that "N units of work" per update. There's still a netmap-sized slice allocation per update (that's #8963), but that's it. Bit more efficient now, especially with larger netmaps: │ before │ after │ │ sec/op │ sec/op vs base │ MapSessionDelta/size_10-8 47.935µ ± 3% 1.232µ ± 2% -97.43% (p=0.000 n=10) MapSessionDelta/size_100-8 79.950µ ± 3% 1.642µ ± 2% -97.95% (p=0.000 n=10) MapSessionDelta/size_1000-8 355.747µ ± 10% 4.400µ ± 1% -98.76% (p=0.000 n=10) MapSessionDelta/size_10000-8 3079.71µ ± 3% 27.89µ ± 3% -99.09% (p=0.000 n=10) geomean 254.6µ 3.969µ -98.44% │ before │ after │ │ B/op │ B/op vs base │ MapSessionDelta/size_10-8 9.651Ki ± 0% 2.395Ki ± 0% -75.19% (p=0.000 n=10) MapSessionDelta/size_100-8 83.097Ki ± 0% 3.192Ki ± 0% -96.16% (p=0.000 n=10) MapSessionDelta/size_1000-8 800.25Ki ± 0% 10.32Ki ± 0% -98.71% (p=0.000 n=10) MapSessionDelta/size_10000-8 7896.04Ki ± 0% 82.32Ki ± 0% -98.96% (p=0.000 n=10) geomean 266.8Ki 8.977Ki -96.64% │ before │ after │ │ allocs/op │ allocs/op vs base │ MapSessionDelta/size_10-8 72.00 ± 0% 20.00 ± 0% -72.22% (p=0.000 n=10) MapSessionDelta/size_100-8 523.00 ± 0% 20.00 ± 0% -96.18% (p=0.000 n=10) MapSessionDelta/size_1000-8 5024.00 ± 0% 20.00 ± 0% -99.60% (p=0.000 n=10) MapSessionDelta/size_10000-8 50024.00 ± 0% 20.00 ± 0% -99.96% (p=0.000 n=10) geomean 1.754k 20.00 -98.86% Updates #1909 Change-Id: I41ee29358a5521ed762216a76d4cc5b0d16e46ac Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2023-08-21types/netmap, all: make NetworkMap.SelfNode a tailcfg.NodeViewBrad Fitzpatrick1-4/+4
Updates #1909 Change-Id: I8c470cbc147129a652c1d58eac9b790691b87606 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2023-08-21control/controlclient: flesh out mapSession to break up gigantic methodBrad Fitzpatrick1-8/+73
Now mapSession has a bunch more fields and methods, rather than being just one massive func with a ton of local variables. So far there are no major new optimizations, though. It should behave the same as before. This has been done with an eye towards testability (so tests can set all the callback funcs as needed, or not, without a huge Direct client or long-running HTTP requests), but this change doesn't add new tests yet. That will follow in the changes which flesh out the NetmapUpdater interface. Updates #1909 Change-Id: Iad4e7442d5bbbe2614bd4b1dc4b02e27504898df Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2023-08-20types/netmap: move some mutations earlier, remove, document some fieldsBrad Fitzpatrick1-3/+4
And optimize the Persist setting a bit, allocating later and only mutating fields when there's been a Node change. Updates #1909 Change-Id: Iaddfd9e88ef76e1d18e8d0a41926eb44d0955312 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2023-08-17all: remove some Debug fields, NetworkMap.Debug, Reconfig Debug argBrad Fitzpatrick1-80/+0
Updates #8923 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2023-08-17tailcfg: remove most Debug fields, move bulk to nodeAttrs [capver 70]Brad Fitzpatrick1-73/+3
Now a nodeAttr: ForceBackgroundSTUN, DERPRoute, TrimWGConfig, DisableSubnetsIfPAC, DisableUPnP. Kept support for, but also now a NodeAttr: RandomizeClientPort. Removed: SetForceBackgroundSTUN, SetRandomizeClientPort (both never used, sadly... never got around to them. But nodeAttrs are better anyway), EnableSilentDisco (will be a nodeAttr later when that effort resumes). Updates #8923 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2023-08-04control: use tstime instead of time (#8595)Claire Wang1-3/+2
Updates #8587 Signed-off-by: Claire Wang <claire@tailscale.com>
2023-07-13net/netcheck, tailcfg: add DERPHomeParams and use itAndrew Dunham1-0/+105
This allows providing additional information to the client about how to select a home DERP region, such as preferring a given DERP region over all others. Updates #8603 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I7c4a270f31d8585112fab5408799ffba5b75266f
2023-03-04all: use tstest.Replace moreMaisem Ali1-4/+4
Signed-off-by: Maisem Ali <maisem@tailscale.com>
2023-01-27all: update copyright and license headersWill Norris1-3/+2
This updates all source files to use a new standard header for copyright and license declaration. Notably, copyright no longer includes a date, and we now use the standard SPDX-License-Identifier header. This commit was done almost entirely mechanically with perl, and then some minimal manual fixes. Updates #6865 Signed-off-by: Will Norris <will@tailscale.com>
2023-01-14ipn/ipnlocal: move handling of expired nodes to LocalBackendAndrew Dunham1-106/+0
In order to be able to synthesize a new NetMap when a node expires, have LocalBackend start a timer when receiving a new NetMap that fires slightly after the next node expires. Additionally, move the logic that updates expired nodes into LocalBackend so it runs on every netmap (whether received from controlclient or self-triggered). Updates #6932 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I833390e16ad188983eac29eb34cc7574f555f2f3
2023-01-11control/controlclient, tailcfg: add Node.Expired field, set for expired nodesAndrew Dunham1-5/+120
Nodes that are expired, taking into account the time delta calculated from MapResponse.ControlTime have the newly-added Expired boolean set. For additional defense-in-depth, also replicate what control does and clear the Endpoints and DERP fields, and additionally set the node key to a bogus value. Updates #6932 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ia2bd6b56064416feee28aef5699ca7090940662a
2022-11-30types/ptr: move all the ptrTo funcs to one new package's ptr.ToBrad Fitzpatrick1-12/+9
Change-Id: Ia0b820ffe7aa72897515f19bd415204b6fe743c7 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2022-09-29all: fix spelling mistakesJosh Soref1-1/+1
Signed-off-by: Josh Soref <2119212+jsoref@users.noreply.github.com>
2022-08-22control/controlclient,tailcfg: [capver 40] create KeySignature field in ↵Tom DNetto1-0/+14
tailcfg.Node We calve out a space to put the node-key signature (used on tailnets where network lock is enabled). Signed-off-by: Tom DNetto <tom@tailscale.com>
2022-08-09tailcfg, control/controlclient: make Debug settings sticky in a map session ↵Brad Fitzpatrick1-0/+151
[capver 37] Fixes #4843 Change-Id: I3accfd91be474ac745cb47f5d6e866c37d5c5d2d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2022-08-02control/controlclient, tailcfg: add 6 more patchable Node fields [capver 36]Brad Fitzpatrick1-1/+89
Change-Id: Iae997a9a98a5dd841bc41fa91227d5a7dd476a25 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2022-07-20tailcfg, control/controlclient: add tailcfg.PeersChangedPatch [capver 33]Brad Fitzpatrick1-0/+56
This adds a lighter mechanism for endpoint updates from control. Change-Id: If169c26becb76d683e9877dc48cfb35f90cc5f24 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2021-10-28control/controlclient: stop using wgkey.David Anderson1-6/+2
Updates #3206 Signed-off-by: David Anderson <danderson@tailscale.com>
2021-10-12all: fix spelling mistakesnicksherron1-1/+1
Signed-off-by: nicksherron <nsherron90@gmail.com>
2021-04-19tailcfg, control/controlclient: accept nil MapResponse.Node (mapver 18)Brad Fitzpatrick1-0/+32
All MapResponse fields can not be omitted and are tagged "omitempty". Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2021-04-19tailcfg, control/controlclient: allow empty MapResponse.Domain (mapver17)Brad Fitzpatrick1-0/+20
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2021-04-18control/controlclient: add start of some MapResponse->NetworkMap testsBrad Fitzpatrick1-0/+92
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2021-04-18control/controlclient: break direct.go into map.go (+tests), add mapSessionBrad Fitzpatrick1-0/+167
So the NetworkMap-from-incremental-MapResponses can be tested easily. And because direct.go was getting too big. No change in behavior at this point. Just movement. Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
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