The omitzero tag option has been backported to v1 "encoding/json"
from the "encoding/json/v2" prototype and will land in Go1.24.
Until we fully upgrade to Go1.24, adjust the test to be agnostic
to which version of Go someone is using.
Updates tailscale/corp#25406
Signed-off-by: Joe Tsai <joetsai@digital-static.net>
The IfElse function is equivalent to the ternary (c ? a : b) operator
in many other languages like C. Unfortunately, this function
cannot perform short-circuit evaluation like in many other languages,
but this is a restriction that's not much different
than the pre-existing cmp.Or function.
The argument against ternary operators in Go is that
nested ternary operators become unreadable
(e.g., (c1 ? (c2 ? a : b) : (c2 ? x : y))).
But a single layer of ternary expressions can sometimes
make code much more readable.
Having the bools.IfElse function gives code authors the
ability to decide whether use of this is more readable or not.
Obviously, code authors will need to be judicious about
their use of this helper function.
Readability is more of an art than a science.
Updates #cleanup
Signed-off-by: Joe Tsai <joetsai@digital-static.net>
Throughout our codebase we have types that only exist only
to implement an io.Reader or io.Writer, when it would have been
simpler, cleaner, and more readable to use an inlined function literal
that closes over the relevant types.
This is arguably more readable since it keeps the semantic logic
in place rather than have it be isolated elsewhere.
Note that a function literal that closes over some variables
is semantic equivalent to declaring a struct with fields and
having the Read or Write method mutate those fields.
Updates #cleanup
Signed-off-by: Joe Tsai <joetsai@digital-static.net>
This gets close to all of the remaining ones.
Updates #12912
Change-Id: I9c672bbed2654a6c5cab31e0cbece6c107d8c6fa
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
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>
We add setting.RawValue, a new type that facilitates unmarshalling JSON numbers and arrays
as uint64 and []string (instead of float64 and []any) for policy setting values.
We then use it to make setting.RawItem JSON-marshallable and update the tests.
Updates #12687
Signed-off-by: Nick Khyl <nickk@tailscale.com>
The bools.Compare function compares boolean values
by reporting -1, 0, +1 for ordering so that it can be easily
used with slices.SortFunc.
Updates #cleanup
Updates tailscale/corp#11038
Signed-off-by: Joe Tsai <joetsai@digital-static.net>
Their callers using Range are all kinda clunky feeling. Iterators
should make them more readable.
Updates #12912
Change-Id: I93461eba8e735276fda4a8558a4ae4bfd6c04922
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
It is sometimes necessary to defer initialization steps until the first actual usage
or until certain prerequisites have been met. For example, policy setting and
policy source registration should not occur during package initialization.
Instead, they should be deferred until the syspolicy package is actually used.
Additionally, any errors should be properly handled and reported, rather than
causing a panic within the package's init function.
In this PR, we add DeferredInit, to facilitate the registration and invocation
of deferred initialization functions.
Updates #12687
Signed-off-by: Nick Hill <mykola.khyl@gmail.com>
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>
And convert a few callers as an example, but nowhere near all.
Updates #12912
Change-Id: I5eaa12a29a6cd03b58d6f1072bd27bc0467852f2
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This adds a new package containing generic types to be used for defining preference hierarchies.
These include prefs.Item, prefs.List, prefs.StructList, and prefs.StructMap. Each of these types
represents a configurable preference, holding the preference's state, value, and metadata.
The metadata includes the default value (if it differs from the zero value of the Go type)
and flags indicating whether a preference is managed via syspolicy or is hidden/read-only for
another reason. This information can be marshaled and sent to the GUI, CLI and web clients
as a source of truth regarding preference configuration, management, and visibility/mutability states.
We plan to use these types to define device preferences, such as the updater preferences,
the permission mode to be used on Windows with #tailscale/corp#18342, and certain global options
that are currently exposed as tailscaled flags. We also aim to eventually use these types for
profile-local preferences in ipn.Prefs and and as a replacement for ipn.MaskedPrefs.
The generic preference types are compatible with the tailscale.com/cmd/viewer and
tailscale.com/cmd/cloner utilities.
Updates #12736
Signed-off-by: Nick Khyl <nickk@tailscale.com>
It is sometimes necessary to change a global lazy.SyncValue for the duration of a test. This PR adds a (*SyncValue[T]).SetForTest method to facilitate that.
Updates #12687
Signed-off-by: Nick Khyl <nickk@tailscale.com>
This adds support for container-like types such as Container[T] that
don't explicitly specify a view type for T. Instead, a package implementing
a container type should also implement and export a ContainerView[T, V] type
and a ContainerViewOf(*Container[T]) ContainerView[T, V] function, which
returns a view for the specified container, inferring the element view type V
from the element type T.
Updates #12736
Signed-off-by: Nick Khyl <nickk@tailscale.com>
This adds the ability to "peek" at the value of a SyncValue, so that
it's possible to observe a value without computing this.
Updates tailscale/corp#17122
Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Co-authored-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Change-Id: I06f88c22a1f7ffcbc7ff82946335356bb0ef4622
The Add method derives a new ID by adding a signed integer
to the ID, treating it as an unsigned 256-bit big-endian integer.
We also add Less and Compare methods to PrivateID to provide
feature parity with existing methods on PublicID.
Updates tailscale/corp#11038
Signed-off-by: Joe Tsai <joetsai@digital-static.net>
This moves NewContainsIPFunc from tsaddr to new ipset package.
And wgengine/filter types gets split into wgengine/filter/filtertype,
so netmap (and thus the CLI, etc) doesn't need to bring in ipset,
bart, etc.
Then add a test making sure the CLI deps don't regress.
Updates #1278
Change-Id: Ia246d6d9502bbefbdeacc4aef1bed9c8b24f54d5
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This abstraction provides a nicer way to work with
maps of slices without having to write out three long type
params.
This also allows it to provide an AsMap implementation which
copies the map and the slices at least.
Updates tailscale/corp#20910
Signed-off-by: Maisem Ali <maisem@tailscale.com>
It was requested by the first customer 4-5 years ago and only used
for a brief moment of time. We later added netmap visibility trimming
which removes the need for this.
It's been hidden by the CLI for quite some time and never documented
anywhere else.
This keeps the CLI flag, though, out of caution. It just returns an
error if it's set to anything but true (its default).
Fixes#12058
Change-Id: I7514ba572e7b82519b04ed603ff9f3bdbaecfda7
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This was a typo in 2e19790f61.
It should have been on `Map` and not on `*Map` as otherwise
it doesn't allow for chaining like `someView.SomeMap().AsMap()`
and requires first assigning it to a variable.
Updates #typo
Signed-off-by: Maisem Ali <maisem@tailscale.com>
It was only obviously unused after the previous change, c39cde79d.
Updates #19334
Change-Id: I9896d5fa692cb4346c070b4a339d0d12340c18f7
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
When node attributes were super rare, the O(n) slice scans looking for
node attributes was more acceptable. But now more code and more users
are using increasingly more node attributes. Time to make it a map.
Noticed while working on tailscale/corp#17879
Updates #cleanup
Change-Id: Ic17c80341f418421002fbceb47490729048756d2
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
In the recent 20e9f3369 we made HealthChangeRequest machine requests
include a NodeKey, as it was the oddball machine request that didn't
include one. Unfortunately, that code was sometimes being called (at
least in some of our integration tests) without a node key due to its
registration with health.RegisterWatcher(direct.ReportHealthChange).
Fortunately tests in corp caught this before we cut a release. It's
possible this only affects this particular integration test's
environment, but still worth fixing.
Updates tailscale/corp#1297
Change-Id: I84046779955105763dc1be5121c69fec3c138672
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
In control there are conditions where the leaf functions are not being
optimized away (i.e. At is not inlined), resulting in undesirable time
spent copying during SliceContains. This optimization is likely
irrelevant to simpler code or smaller structures.
Updates #optimization
Signed-off-by: James Tucker <james@tailscale.com>
So we can use it in trunkd to quiet down the logs there.
Updates #5563
Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Change-Id: Ie3177dc33f5ad103db832aab5a3e0e4f128f973f
It's unnecessary. Returning an array value is already a copy.
Updates #cleanup
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
Change-Id: If7f350b61003ea08f16a531b7b4e8ae483617939
For a second we thought this was allocating but we were looking
at a CPU profile (which showed calls to mallocgc view makeslice)
instead of the alloc profile.
Updates golang/go#65685 (which if fixed wouldn't have confused us)
Change-Id: Ic0132310d52d8a65758a516142525339aa23b1ed
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
views.Slice are meant to be immutable, and if used as such it
is at times desirable to use them as a key in a map. For non-viewed
slices it was kinda doable by creating a custom key struct but views.Slice
didn't allow for the same so add a method to create that struct here.
Updates tailscale/corp#17122
Signed-off-by: Maisem Ali <maisem@tailscale.com>
This commit implements probing of UDP path lifetime on the tail end of
an active direct connection. Probing configuration has two parts -
Cliffs, which are various timeout cliffs of interest, and
CycleCanStartEvery, which limits how often a probing cycle can start,
per-endpoint. Initially a statically defined default configuration will
be used. The default configuration has cliffs of 10s, 30s, and 60s,
with a CycleCanStartEvery of 24h. Probing results are communicated via
clientmetric counters. Probing is off by default, and can be enabled
via control knob. Probing is purely informational and does not yet
drive any magicsock behaviors.
Updates #540
Signed-off-by: Jordan Whited <jordan@tailscale.com>
Control can now send down a set of routes along with the domains, and
the routes will be advertised, with any newly overlapped routes being
removed to reduce the size of the routing table.
Fixestailscale/corp#16833
Signed-off-by: James Tucker <james@tailscale.com>
Also perform minor cleanups on the ctxkey package itself.
Provide guidance on when to use ctxkey.Key[T] over ctxkey.New.
Also, allow for interface kinds because the value wrapping trick
also happens to fix edge cases with interfaces in Go.
Updates #cleanup
Signed-off-by: Joe Tsai <joetsai@digital-static.net>
The cmpx.Compare function (and associated interface) are now available
in the standard library as cmp.Compare. Remove our version of it and use
the version from the standard library.
Updates #cleanup
Signed-off-by: Andrew Dunham <andrew@du.nham.ca>
Change-Id: I4be3ac63d466c05eb7a0babb25cb0d41816fbd53
When auto-update setting in local Prefs is unset, apply the tailnet
default value from control. This only happens once, when we apply the
default (or when the user manually overrides it), tailnet default no
longer affects the node.
Updates #16244
Signed-off-by: Andrew Lytvynov <awly@tailscale.com>
Joe Tsai
Brad Fitzpatrick
Nick Khyl
Nick Hill
Erisa A
Andrea Gottardo
Will Norris
Andrew Dunham
Maisem Ali
James Tucker
Jordan Whited
James 'zofrex' Sanderson
Andrew Lytvynov
Tom DNetto