tailscale

Commit Graph

Author	SHA1	Message	Date
James Tucker	d0f3fa7d7e	util/fastuuid: add a more efficient uuid generator This still generates github.com/google/uuid UUID objects, but does so using a ChaCha8 CSPRNG from the stdlib rand/v2 package. The public API is backed by a sync.Pool to provide good performance in highly concurrent operation. Under high load the read API produces a lot of extra garbage and overhead by way of temporaries and syscalls. This implementation reduces both to minimal levels, and avoids any long held global lock by utilizing sync.Pool. Updates tailscale/corp#18266 Updates tailscale/corp#19054 Signed-off-by: James Tucker <james@tailscale.com>	7 months ago
James Tucker	db760d0bac	cmd/tailscaled: move cleanup to an implicit action during startup This removes a potentially increased boot delay for certain boot topologies where they block on ExecStartPre that may have socket activation dependencies on other system services (such as systemd-resolved and NetworkManager). Also rename cleanup to clean up in affected/immediately nearby places per code review commentary. Fixes #11599 Signed-off-by: James Tucker <james@tailscale.com>	7 months ago
Nick Khyl	8d83adde07	util/winutil/winenv: add package for current Windows environment details Package winenv provides information about the current Windows environment. This includes details such as whether the device is a server or workstation, and if it is AD domain-joined, MDM-registered, or neither. Updates tailscale/corp#18342 Signed-off-by: Nick Khyl <nickk@tailscale.com>	7 months ago
Irbe Krumina	1fbaf26106	util/linuxfw: fix chain comparison (#11639 ) Don't compare pointer fields by pointer value, but by the actual value Updates#cleanup Signed-off-by: Irbe Krumina <irbe@tailscale.com>	7 months ago
Joe Tsai	4bbac72868	util/truncate: support []byte as well (#11614 ) There are no mutations to the input, so we can support both ~string and ~[]byte just fine. Updates #cleanup Signed-off-by: Joe Tsai <joetsai@digital-static.net>	7 months ago
Joe Tsai	1a38d2a3b4	util/zstdframe: support specifying a MaxWindowSize (#11595 ) Specifying a smaller window size during compression provides a knob to tweak the tradeoff between memory usage and the compression ratio. Updates tailscale/corp#18514 Signed-off-by: Joe Tsai <joetsai@digital-static.net>	7 months ago
Irbe Krumina	92ca770b8d	util/linuxfw: fix MSS clamping in nftables mode (#11588 ) MSS clamping for nftables was mostly not ran due to to an earlier rule in the FORWARD chain issuing accept verdict. This commit places the clamping rule into a chain of its own to ensure that it gets ran. Updates tailscale/tailscale#11002 Signed-off-by: Irbe Krumina <irbe@tailscale.com>	7 months ago
Irbe Krumina	5fb721d4ad	util/linuxfw,wgengine/router: skip IPv6 firewall configuration in partial iptables mode (#11546 ) We have hosts that support IPv6, but not IPv6 firewall configuration in iptables mode. We also have hosts that have some support for IPv6 firewall configuration in iptables mode, but do not have iptables filter table. We should: - configure ip rules for all hosts that support IPv6 - only configure firewall rules in iptables mode if the host has iptables filter table. Updates tailscale/tailscale#11540 Signed-off-by: Irbe Krumina <irbe@tailscale.com>	8 months ago
Percy Wegmann	bed818a978	ipn/localapi: add support for multipart POST to file-put This allows sending multiple files via Taildrop in one request. Progress is tracked via ipn.Notify. Updates tailscale/corp#18202 Signed-off-by: Percy Wegmann <percy@tailscale.com>	8 months ago
James Tucker	3f7313dbdb	util/linuxfw,wgengine/router: enable IPv6 configuration when netfilter is disabled Updates #11434 Signed-off-by: James Tucker <james@tailscale.com>	8 months ago
Joe Tsai	d4bfe34ba7	util/zstdframe: add package for stateless zstd compression (#11481 ) The Go zstd package is not friendly for stateless zstd compression. Passing around multiple zstd.Encoder just for stateless compression is a waste of memory since the memory is never freed and seldom used if no compression operations are happening. For performance, we pool the relevant Encoder/Decoder with the specific options set. Functionally, this package is a wrapper over the Go zstd package with a more ergonomic API for stateless operations. This package can be used to cleanup various pre-existing zstd.Encoder pools or one-off handlers spread throughout our codebases. Performance: BenchmarkEncode/Best 1690 610926 ns/op 25.78 MB/s 1 B/op 0 allocs/op zstd_test.go:137: memory: 50.336 MiB zstd_test.go:138: ratio: 3.269x BenchmarkEncode/Better 10000 100939 ns/op 156.04 MB/s 0 B/op 0 allocs/op zstd_test.go:137: memory: 20.399 MiB zstd_test.go:138: ratio: 3.131x BenchmarkEncode/Default 15775 74976 ns/op 210.08 MB/s 105 B/op 0 allocs/op zstd_test.go:137: memory: 1.586 MiB zstd_test.go:138: ratio: 3.064x BenchmarkEncode/Fastest 23222 53977 ns/op 291.81 MB/s 26 B/op 0 allocs/op zstd_test.go:137: memory: 599.458 KiB zstd_test.go:138: ratio: 2.898x BenchmarkEncode/FastestLowMemory 23361 50789 ns/op 310.13 MB/s 15 B/op 0 allocs/op zstd_test.go:137: memory: 334.458 KiB zstd_test.go:138: ratio: 2.898x BenchmarkEncode/FastestNoChecksum 23086 50253 ns/op 313.44 MB/s 26 B/op 0 allocs/op zstd_test.go:137: memory: 599.458 KiB zstd_test.go:138: ratio: 2.900x BenchmarkDecode/Checksum 70794 17082 ns/op 300.96 MB/s 4 B/op 0 allocs/op zstd_test.go:163: memory: 316.438 KiB BenchmarkDecode/NoChecksum 74935 15990 ns/op 321.51 MB/s 4 B/op 0 allocs/op zstd_test.go:163: memory: 316.438 KiB BenchmarkDecode/LowMemory 71043 16739 ns/op 307.13 MB/s 0 B/op 0 allocs/op zstd_test.go:163: memory: 79.347 KiB We can see that the options are taking effect where compression ratio improves with higher levels and compression speed diminishes. We can also see that LowMemory takes effect where the pooled coder object references less memory than other cases. We can see that the pooling is taking effect as there are 0 amortized allocations. Additional performance: BenchmarkEncodeParallel/zstd-24 1857 619264 ns/op 1796 B/op 49 allocs/op BenchmarkEncodeParallel/zstdframe-24 1954 532023 ns/op 4293 B/op 49 allocs/op BenchmarkDecodeParallel/zstd-24 5288 197281 ns/op 2516 B/op 49 allocs/op BenchmarkDecodeParallel/zstdframe-24 6441 196254 ns/op 2513 B/op 49 allocs/op In concurrent usage, handling the pooling in this package has a marginal benefit over the zstd package, which relies on a Go channel as the pooling mechanism. In particular, coders can be freed by the GC when not in use. Coders can be shared throughout the program if they use this package instead of multiple independent pools doing the same thing. The allocations are unrelated to pooling as they're caused by the spawning of goroutines. Updates #cleanup Updates tailscale/corp#18514 Updates tailscale/corp#17653 Updates tailscale/corp#18005 Signed-off-by: Joe Tsai <joetsai@digital-static.net>	8 months ago
Brad Fitzpatrick	5d1c72f76b	wgengine/magicsock: don't use endpoint debug ringbuffer on mobile. Save some memory. Updates tailscale/corp#18514 Change-Id: Ibcaf3c6d8e5cc275c81f04141d0f176e2249509b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	8 months ago
Andrew Dunham	512fc0b502	util/reload: add new package to handle periodic value loading This can be used to reload a value periodically, whether from disk or another source, while handling jitter and graceful shutdown. Updates tailscale/corp#1297 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Iee2b4385c9abae59805f642a7308837877cb5b3f	8 months ago
James Tucker	055117ad45	util/linuxfw: fix support for containers without IPv6 iptables filters (#11381 ) There are container environments such as GitHub codespaces that have partial IPv6 support - routing support is enabled at the kernel level, but lacking IPv6 filter support in the iptables module. In the specific example of the codespaces environment, this also has pre-existing legacy iptables rules in the IPv4 tables, as such the nascent firewall mode detection will always pick iptables. We would previously fault trying to install rules to the filter table, this catches that condition earlier, and disables IPv6 support under these conditions. Updates #5621 Updates #11344 Updates #11354 Signed-off-by: James Tucker <james@tailscale.com>	8 months ago
James Tucker	43fba6e04d	util/linuxfw: correct logical error in NAT table check (#11380 ) Updates #11344 Updates #11354 Signed-off-by: James Tucker <james@tailscale.com>	8 months ago
Irbe Krumina	90c4067010	util/linuxfw: add container-friendly IPv6 NAT check (#11353 ) Remove IPv6 NAT check when routing is being set up using nftables. This is unnecessary as support for nftables was added after support for IPv6. https://tldp.org/HOWTO/Linux+IPv6-HOWTO/ch18s04.html https://wiki.nftables.org/wiki-nftables/index.php/Building_and_installing_nftables_from_sources Additionally, run an extra check for IPv6 NAT support when the routing is set up with iptables. This is because the earlier checks rely on being able to use modprobe and on /proc/net/ip6_tables_names being populated on start - these conditions are usually not true in container environments. Updates tailscale/tailscale#11344 Signed-off-by: Irbe Krumina <irbe@tailscale.com>	8 months ago
Paul Scott	2fa20e3787	util/cmpver: add Less/LessEq helper funcs Updates tailscale/corp#17199 Signed-off-by: Paul Scott <paul@tailscale.com>	8 months ago
Irbe Krumina	097c5ed927	util/linuxfw: insert rather than append nftables DNAT rule (#11303 ) Ensure that the latest DNATNonTailscaleTraffic rule gets inserted on top of any pre-existing rules. Updates tailscale/tailscale#11281 Signed-off-by: Irbe Krumina <irbe@tailscale.com>	9 months ago
Andrew Dunham	a20e46a80f	util/cache: fix missing interface methods (#11275 ) Updates #cleanup Change-Id: Ib3a33a7609530ef8c9f3f58fc607a61e8655c4b5 Signed-off-by: Andrew Dunham <andrew@du.nham.ca>	9 months ago
Andrea Gottardo	0359c2f94e	util/syspolicy: add 'ResetToDefaults' (#11194 ) Updates ENG-2133. Adds the ResetToDefaults visibility policy currently only available on macOS, so that the Windows client can read its value. Signed-off-by: Andrea Gottardo <andrea@gottardo.me>	9 months ago
Andrea Gottardo	d756622432	util/syspolicy: add ManagedBy keys for Windows (#11183 )	9 months ago
Andrew Dunham	b7104cde4a	util/topk: add package containing a probabilistic top-K tracker This package uses a count-min sketch and a heap to track the top K items in a stream of data. Tracking a new item and adding a count to an existing item both require no memory allocations and is at worst O(log(k)) complexity. Change-Id: I0553381be3fef2470897e2bd806d43396f2dbb36 Signed-off-by: Andrew Dunham <andrew@du.nham.ca>	9 months ago
Andrew Dunham	c1c50cfcc0	util/cloudenv: add support for DigitalOcean Updates #4984 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ib229eb40af36a80e6b0fd1dd0cabb07f0d50a7d1	9 months ago
James Tucker	24bac27632	util/rands: add Shuffle and Perm functions with on-stack RNG state The new math/rand/v2 package includes an m-local global random number generator that can not be reseeded by the user, which is suitable for most uses without the RNG pools we have in a number of areas of the code base. The new API still does not have an allocation-free way of performing a seeded operations, due to the long term compiler bug around interface parameter escapes, and the Source interface. This change introduces the two APIs that math/rand/v2 can not yet replace efficiently: seeded Perm() and Shuffle() operations. This implementation chooses to use the PCG random source from math/rand/v2, as with sufficient compiler optimization, this source should boil down to only two on-stack registers for random state under ideal conditions. Updates #17243 Signed-off-by: James Tucker <james@tailscale.com>	9 months ago
Joe Tsai	94a4f701c2	all: use reflect.TypeFor now available in Go 1.22 (#11078 ) Updates #cleanup Signed-off-by: Joe Tsai <joetsai@digital-static.net>	9 months ago
Joe Tsai	efddad7d7d	util/deephash: cleanup TODO in TestHash (#11080 ) Updates #cleanup Signed-off-by: Joe Tsai <joetsai@digital-static.net>	9 months ago
Brad Fitzpatrick	2bd3c1474b	util/cmpx: delete now that we're using Go 1.22 Updates #11058 Change-Id: I09dea8e86f03ec148b715efca339eab8b1f0f644 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	9 months ago
James Tucker	0b16620b80	.github/workflows: add privileged tests workflow We had missed regressions from privileged tests not running, now they can run. Updates #cleanup Signed-off-by: James Tucker <james@tailscale.com>	9 months ago
Joe Tsai	60657ac83f	util/deephash: tighten up SelfHasher API (#11012 ) Providing a hash.Block512 is an implementation detail of how deephash works today, but providing an opaque type with mostly equivalent API (i.e., HashUint8, HashBytes, etc. methods) is still sensible. Thus, define a public Hasher type that exposes exactly the API that an implementation of SelfHasher would want to call. This gives us freedom to change the hashing algorithm of deephash at some point in the future. Also, this type is likely going to be called by types that are going to memoize their own hash results, we additionally add a HashSum method to simplify this use case. Add documentation to SelfHasher on how a type might implement it. Updates: corp#16409 Signed-off-by: Joe Tsai <joetsai@digital-static.net>	9 months ago
Joe Tsai	84f8311bcd	util/deephash: document pathological deephash behavior (#11010 ) Updates #cleanup Signed-off-by: Joe Tsai <joetsai@digital-static.net>	9 months ago
Tom DNetto	2aeef4e610	util/deephash: implement SelfHasher to allow types to hash themselves Updates: corp#16409 Signed-off-by: Tom DNetto <tom@tailscale.com>	9 months ago
James Tucker	0f3b2e7b86	util/expvarx: add a time and concurrency limiting expvar.Func wrapper expvarx.SafeFunc wraps an expvar.Func with a time limit. On reaching the time limit, calls to Value return nil, and no new concurrent calls to the underlying expvar.Func will be started until the call completes. Updates tailscale/corp#16999 Signed-off-by: James Tucker <james@tailscale.com>	10 months ago
as2643	832e5c781d	util/nocasemaps: add AppendSliceElem method to nocasemaps (#10871 ) Updates #7667 Signed-off-by: Anishka Singh <anishkasingh66@gmail.com>	10 months ago
Andrew Dunham	2ac7c0161b	util/slicesx: add Filter function For use in corp, where we appear to have re-implemented this in a few places with varying signatures. Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Id863a87e674f3caa87945519be8e09650e9c1d76	10 months ago
James Tucker	38a1cf748a	control/controlclient,util/execqueue: extract execqueue into a package This is a useful primitive for asynchronous execution of ordered work I want to use in another change. Updates tailscale/corp#16833 Signed-off-by: James Tucker <james@tailscale.com>	10 months ago
Joe Tsai	c25968e1c5	all: make use of ctxkey everywhere (#10846 ) 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>	10 months ago
Joe Tsai	241a541864	util/ctxkey: add package for type-safe context keys (#10841 ) The lack of type-safety in context.WithValue leads to the common pattern of defining of package-scoped type to ensure global uniqueness: type fooKey struct{} func withFoo(ctx context, v Foo) context.Context { return context.WithValue(ctx, fooKey{}, v) } func fooValue(ctx context) Foo { v, _ := ctx.Value(fooKey{}).(Foo) return v } where usage becomes: ctx = withFoo(ctx, foo) foo := fooValue(ctx) With many different context keys, this can be quite tedious. Using generics, we can simplify this as: var fooKey = ctxkey.New("mypkg.fooKey", Foo{}) where usage becomes: ctx = fooKey.WithValue(ctx, foo) foo := fooKey.Value(ctx) See https://go.dev/issue/49189 Updates #cleanup Signed-off-by: Joe Tsai <joetsai@digital-static.net>	10 months ago
Aaron Klotz	aed2cfec4e	util/winutil: add some missing docs to restartmgr errors Just a quick #cleanup. Signed-off-by: Aaron Klotz <aaron@tailscale.com>	10 months ago
Aaron Klotz	5812093d31	util/winutil: publicize existing functions for opening read-only connections to the Windows Service Control Manager We're going to need to access these from code outside winutil. Updates #10215 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	11 months ago
Andrew Lytvynov	2716250ee8	all: cleanup unused code, part 2 (#10670 ) And enable U1000 check in staticcheck. Updates #cleanup Signed-off-by: Andrew Lytvynov <awly@tailscale.com>	11 months ago
Andrew Lytvynov	1302bd1181	all: cleanup unused code, part 1 (#10661 ) Run `staticcheck` with `U1000` to find unused code. This cleans up about a half of it. I'll do the other half separately to keep PRs manageable. Updates #cleanup Signed-off-by: Andrew Lytvynov <awly@tailscale.com>	11 months ago
Andrew Dunham	a661287c4b	util/cmpx: remove code that's in the stdlib now 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	11 months ago
Irbe Krumina	0cdc8e20d6	util/linuxfw: return created chain (#10563 ) Ensure that if getOrCreateChain creates a new chain, it actually returns the created chain Updates tailscale/tailscale#10399 Signed-off-by: Irbe Krumina <irbe@tailscale.com>	11 months ago
Adrian Dewhurst	86aa0485a6	ipn/ipnlocal, util/syspolicy: make run exit node a preference option Previously, the "RunExitNode" policy merely controlled the visibility of the "run as exit node" menu item, not the setting itself. This migrates that setting to a preference option named "AdvertiseExitNode". Updates ENG-2138 Change-Id: Ia6a125beb6b4563d380c6162637ce4088f1117a0 Signed-off-by: Adrian Dewhurst <adrian@tailscale.com>	11 months ago
Andrea Gottardo	646d17ac8d	util/syspolicy: rename client metric keys (#10516 ) Updates ENG-2513. Renames client metrics keys used on Windows for consistency with Apple platforms. Signed-off-by: Andrea Gottardo <andrea@tailscale.com>	11 months ago
Andrew Dunham	9fd29f15c7	util/cache: add package for general-purpose caching This package allows caching arbitrary key/value pairs in-memory, along with an interface implemented by the cache types. Extracted from #7493 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ic8ca820927c456721cf324a0c8f3882a57752cc9	11 months ago
Adrian Dewhurst	f706a3abd0	ipn/ipnlocal, util/syspolicy: add auto update policy Due to the Sparkle preference naming convention, macsys already has a policy key named "ApplyUpdates" that merely shows or hides the menu item that controls if auto updates are installed, rather than directly controlling the setting. For other platforms, we are going to use "InstallUpdates" instead because it seemed better than the other options that were considered. Updates ENG-2127 Updates tailscale/corp#16247 Change-Id: Ia6a125beb6b4563d380c6162637ce4088f1117a0 Signed-off-by: Adrian Dewhurst <adrian@tailscale.com>	11 months ago
Adrian Dewhurst	af32d1c120	ipn/ipnlocal: better enforce system policies Previously, policies affected the default prefs for a new profile, but that does not affect existing profiles. This change ensures that policies are applied whenever preferences are loaded or changed, so a CLI or GUI client that does not respect the policies will still be overridden. Exit node IP is dropped from this PR as it was implemented elsewhere in #10172. Fixes tailscale/corp#15585 Change-Id: Ide4c3a4b00a64e43f506fa1fab70ef591407663f Signed-off-by: Adrian Dewhurst <adrian@tailscale.com>	11 months ago
Naman Sood	d46a4eced5	util/linuxfw, wgengine: allow ingress to magicsock UDP port on Linux (#10370 ) * util/linuxfw, wgengine: allow ingress to magicsock UDP port on Linux Updates #9084. Currently, we have to tell users to manually open UDP ports on Linux when certain firewalls (like ufw) are enabled. This change automates the process of adding and updating those firewall rules as magicsock changes what port it listens on. Signed-off-by: Naman Sood <mail@nsood.in>	11 months ago
Claire Wang	47db67fef5	util/syspolicy: add policy counters (#10471 ) Fixes tailscale/corp#16138 Signed-off-by: Claire Wang <claire@tailscale.com>	11 months ago
Naman Sood	0a59754eda	linuxfw,wgengine/route,ipn: add c2n and nodeattrs to control linux netfilter Updates tailscale/corp#14029. Signed-off-by: Naman Sood <mail@nsood.in>	11 months ago
Adrian Dewhurst	94a64c0017	util/syspolicy: rename incorrectly named policy keys These keys were intended to match the Apple platforms, but accidentally used the wrong name. Updates ENG-2133 Change-Id: I9ed7a17919e34e2d8896a5c64efc4d0c0003166e Signed-off-by: Adrian Dewhurst <adrian@tailscale.com>	11 months ago
Aaron Klotz	db39a43f06	util/winutil: add support for restarting Windows processes in specific sessions This PR is all about adding functionality that will enable the installer's upgrade sequence to terminate processes belonging to the previous version, and then subsequently restart instances belonging to the new version within the session(s) corresponding to the processes that were killed. There are multiple parts to this: * We add support for the Restart Manager APIs, which allow us to query the OS for a list of processes locking specific files; * We add the RestartableProcess and RestartableProcesses types that query additional information about the running processes that will allow us to correctly restart them in the future. These types also provide the ability to terminate the processes. * We add the StartProcessInSession family of APIs that permit us to create new processes within specific sessions. This is needed in order to properly attach a new GUI process to the same RDP session and desktop that its previously-terminated counterpart would have been running in. * I tweaked the winutil token APIs again. * A lot of this stuff is pretty hard to test without a very elaborate harness, but I added a unit test for the most complicated part (though it requires LocalSystem to run). Updates https://github.com/tailscale/corp/issues/13998 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	12 months ago
Claire Wang	8af503b0c5	syspolicy: add exit node related policies (#10172 ) Adds policy keys ExitNodeID and ExitNodeIP. Uses the policy keys to determine the exit node in preferences. Fixes tailscale/corp#15683 Signed-off-by: Claire Wang <claire@tailscale.com>	12 months ago
Andrew Dunham	5aa7687b21	util/httpm: don't run test if .git doesn't exist Updates #9635 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I9089200f9327605036c88fc12834acece0c11694	12 months ago
Andrew Lytvynov	2c1f14d9e6	util/set: implement json.Marshaler/Unmarshaler (#10308 ) Marshal as a JSON list instead of a map. Because set elements are `comparable` and not `cmp.Ordered`, we cannot easily sort the items before marshaling. Updates #cleanup Signed-off-by: Andrew Lytvynov <awly@tailscale.com>	12 months ago
Claire Wang	b8a2aedccd	util/syspolicy: add caching handler (#10288 ) Fixes tailscale/corp#15850 Co-authored-by: Adrian Dewhurst <adrian@tailscale.com> Signed-off-by: Claire Wang <claire@tailscale.com>	12 months ago
Adrian Dewhurst	b8ac3c5191	util/syspolicy: add some additional policy keys These policy keys are supported on Apple platforms in Swift code; in order to support them on platforms using Go (e.g. Windows), they also need to be recorded here. This does not affect any code, it simply adds the constants for now. Updates ENG-2240 Updates ENG-2127 Updates ENG-2133 Change-Id: I0aa9863a3641e5844479da3b162761452db1ef42 Signed-off-by: Adrian Dewhurst <adrian@tailscale.com>	1 year ago
Adrian Dewhurst	1ef5bd5381	util/osdiag, util/winutil: expose Windows policy key The Windows base registry key is already exported but the policy key was not. util/osdiag currently replicates the string rather than the preferred approach of reusing the constant. Updates #cleanup Change-Id: I6c1c45337896c744059b85643da2364fb3f232f2 Signed-off-by: Adrian Dewhurst <adrian@tailscale.com>	1 year ago
Aaron Klotz	855f79fad7	cmd/tailscaled, util/winutil: changes to process and token APIs in winutil This PR changes the internal getTokenInfo function to use generics. I also removed our own implementations for obtaining a token's user and primary group in favour of calling the ones now available in x/sys/windows. Furthermore, I added two new functions for working with tokens, logon session IDs, and Terminal Services / RDP session IDs. I modified our privilege enabling code to allow enabling of multiple privileges via one single function call. Finally, I added the ProcessImageName function and updated the code in tailscaled_windows.go to use that instead of directly calling the underlying API. All of these changes will be utilized by subsequent PRs pertaining to this issue. Updates https://github.com/tailscale/corp/issues/13998 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	1 year ago
Andrew Lytvynov	1fc1077052	ssh/tailssh,util: extract new osuser package from ssh code (#10170 ) This package is a wrapper for os/user that handles non-cgo builds, gokrazy and user shells. Updates tailscale/corp#15405 Signed-off-by: Andrew Lytvynov <awly@tailscale.com>	1 year ago
Andrew Lytvynov	aba4bd0c62	util/winutil: simplify dropping privileges after use (#10099 ) To safely request and drop privileges, runtime.Lock/UnlockOSThread and windows.Impersonate/RevertToSelf should be called. Add these calls to winutil.EnableCurrentThreadPrivilege so that callers don't need to worry about it. Updates https://github.com/tailscale/corp/issues/15488 Signed-off-by: Andrew Lytvynov <awly@tailscale.com>	1 year ago
Claire Wang	5de8650466	syspolicy: add Allow LAN Access visibility key (#10113 ) Fixes tailscale/corp#15594 Signed-off-by: Claire Wang <claire@tailscale.com>	1 year ago
Aaron Klotz	fbc18410ad	ipn/ipnauth: improve the Windows token administrator check (Token).IsAdministrator is supposed to return true even when the user is running with a UAC limited token. The idea is that, for the purposes of this check, we don't care whether the user is currently* running with full Admin rights, we just want to know whether the user can potentially do so. We accomplish this by querying for the token's "linked token," which should be the fully-elevated variant, and checking its group memberships. We also switch ipn/ipnserver/(*Server).connIsLocalAdmin to use the elevation check to preserve those semantics for tailscale serve; I want the IsAdministrator check to be used for less sensitive things like toggling auto-update on and off. Fixes #10036 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	1 year ago
Brad Fitzpatrick	673ff2cb0b	util/groupmember: fail earlier if group doesn't exist, use slices.Contains Noticed both while re-reading this code. Updates #cleanup Change-Id: I3b70f1d5dc372853fa292ae1adbdee8cfc6a9a7b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Chris Palmer	3a9f5c02bf	util/set: make Clone a method (#10044 ) Updates #cleanup Signed-off-by: Chris Palmer <cpalmer@tailscale.com>	1 year ago
Chris Palmer	00375f56ea	util/set: add some more Set operations (#10022 ) Updates #cleanup Signed-off-by: Chris Palmer <cpalmer@tailscale.com>	1 year ago
Maisem Ali	62d580f0e8	util/linuxfw: add missing error checks in tests This would surface as panics when run on Fly. Still fail, but at least don't panic. Updates #10003 Signed-off-by: Maisem Ali <maisem@tailscale.com>	1 year ago
Andrea Gottardo	741d7bcefe	Revert "ipn/ipnlocal: add new DNS and subnet router policies" (#9962 ) This reverts commit `32194cdc70`. Signed-off-by: Nick O'Neill <nick@tailscale.com>	1 year ago
Adrian Dewhurst	32194cdc70	ipn/ipnlocal: add new DNS and subnet router policies In addition to the new policy keys for the new options, some already-in-use but missing policy keys are also being added to util/syspolicy. Updates ENG-2133 Change-Id: Iad08ca47f839ea6a65f81b76b4f9ef21183ebdc6 Signed-off-by: Adrian Dewhurst <adrian@tailscale.com>	1 year ago
Maisem Ali	c3a8e63100	util/linuxfw: add additional nftable detection logic We were previously using the netlink API to see if there are chains/rules that already exist. This works fine in environments where there is either full nftable support or no support at all. However, we have identified certain environments which have partial nftable support and the only feasible way of detecting such an environment is to try to create some of the chains that we need. This adds a check to create a dummy postrouting chain which is immediately deleted. The goal of the check is to ensure we are able to use nftables and that it won't error out later. This check is only done in the path where we detected that the system has no preexisting nftable rules. Updates #5621 Updates #8555 Updates #8762 Signed-off-by: Maisem Ali <maisem@tailscale.com>	1 year ago
Maisem Ali	b47cf04624	util/linuxfw: fix broken tests These tests were broken at HEAD. CI currently does not run these as root, will figure out how to do that in a followup. Updates #5621 Updates #8555 Updates #8762 Signed-off-by: Maisem Ali <maisem@tailscale.com>	1 year ago
Kristoffer Dalby	e06f2f1873	ipn/ipnlocal: change serial number policy to be PreferenceOption This commit changes the PostureChecking syspolicy key to be a PreferenceOption(user-defined, always, never) instead of Bool. This aligns better with the defaults implementation on macOS allowing CLI arguments to be read when user-defined or no defaults is set. Updates #tailscale/tailscale/5902 Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>	1 year ago
Joe Tsai	9cb6c5bb78	util/httphdr: add new package for parsing HTTP headers (#9797 ) This adds support for parsing Range and Content-Range headers according to RFC 7230. The package could be extended in the future to handle other headers. Updates tailscale/corp#14772 Signed-off-by: Joe Tsai <joetsai@digital-static.net>	1 year ago
Claire Wang	754fb9a8a8	tailcfg: add tailnet field to register request (#9675 ) Updates tailscale/corp#10967 Signed-off-by: Claire Wang <claire@tailscale.com>	1 year ago
James Tucker	11348fbe72	util/nocasemaps: import nocasemaps from corp This is a dependency of other code being imported later. Updates tailscale/corp#15043 Signed-off-by: James Tucker <james@tailscale.com>	1 year ago
Maisem Ali	fbfee6a8c0	cmd/containerboot: use linuxfw.NetfilterRunner This migrates containerboot to reuse the NetfilterRunner used by tailscaled instead of manipulating iptables rule itself. This has the added advantage of now working with nftables and we can potentially drop the `iptables` command from the container image in the future. Updates #9310 Co-authored-by: Irbe Krumina <irbe@tailscale.com> Signed-off-by: Maisem Ali <maisem@tailscale.com>	1 year ago
Maisem Ali	aad3584319	util/linuxfw: move fake runner into pkg This allows using the fake runner in different packages that need to manage filter rules. Updates #cleanup Signed-off-by: Maisem Ali <maisem@tailscale.com>	1 year ago
Paul Scott	4e083e4548	util/cmpver: only consider ascii numerals (#9741 ) Fixes #9740 Signed-off-by: Paul Scott <paul@tailscale.com>	1 year ago
Maisem Ali	05a1f5bf71	util/linuxfw: move detection logic Just a refactor to consolidate the firewall detection logic in a single package so that it can be reused in a later commit by containerboot. Updates #9310 Signed-off-by: Maisem Ali <maisem@tailscale.com>	1 year ago
James Tucker	ba6ec42f6d	util/linuxfw: add missing input rule to the tailscale tun Add an explicit accept rule for input to the tun interface, as a mirror to the explicit rule to accept output from the tun interface. The rule matches any packet in to our tun interface and accepts it, and the rule is positioned and prioritized such that it should be evaluated prior to conventional ufw/iptables/nft rules. Updates #391 Fixes #7332 Updates #9084 Signed-off-by: James Tucker <james@tailscale.com>	1 year ago
Kristoffer Dalby	7f540042d5	ipn/ipnlocal: use syspolicy to determine collection of posture data Updates #5902 Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>	1 year ago
Andrew Dunham	5902d51ba4	util/race: add test to confirm we don't leak goroutines Updates #cleanup Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Iff147268db50251d498fff5213adb8d4b8c999d4	1 year ago
Andrew Dunham	286c6ce27c	net/dns/resolver: race UDP and TCP queries (#9544 ) Instead of just falling back to making a TCP query to an upstream DNS server when the UDP query returns a truncated query, also start a TCP query in parallel with the UDP query after a given race timeout. This ensures that if the upstream DNS server does not reply over UDP (or if the response packet is blocked, or there's an error), we can still make queries if the server replies to TCP queries. This also adds a new package, util/race, to contain the logic required for racing two different functions and returning the first non-error answer. Updates tailscale/corp#14809 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I4311702016c1093b1beaa31b135da1def6d86316	1 year ago
Brad Fitzpatrick	b775a3799e	util/httpm, all: add a test to make sure httpm is used consistently Updates #cleanup Change-Id: I7dbf8a02de22fc6b317ab5e29cc97792dd75352c Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Brad Fitzpatrick	5f5c9142cc	util/slicesx: add EqualSameNil, like slices.Equal but same nilness Then use it in tailcfg which had it duplicated a couple times. I think we have it a few other places too. And use slices.Equal in wgengine/router too. (found while looking for callers) Updates #cleanup Change-Id: If5350eee9b3ef071882a3db29a305081e4cd9d23 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Claire Wang	a56e58c244	util/syspolicy: add read boolean setting (#9592 )	1 year ago
Chris Palmer	8833dc51f1	util/set: add some useful utility functions for Set (#9535 ) Also give each type of set its own file. Updates #cleanup Signed-off-by: Chris Palmer <cpalmer@tailscale.com>	1 year ago
Claire Wang	32c0156311	util: add syspolicy package (#9550 ) Add a more generalized package for getting policies. Updates tailcale/corp#10967 Signed-off-by: Claire Wang <claire@tailscale.com> Co-authored-by: Adrian Dewhurst <adrian@tailscale.com>	1 year ago
James Tucker	2066f9fbb2	util/linuxfw: fix crash in DelSNATRule when no rules are found Appears to be a missing nil handling case. I looked back over other usage of findRule and the others all have nil guards. findRule returns nil when no rules are found matching the arguments. Fixes #9553 Signed-off-by: James Tucker <james@tailscale.com>	1 year ago
Claire Wang	e3d6236606	winutil: refactor methods to get values from registry to also return (#9536 ) errors Updates tailscale/corp#14879 Signed-off-by: Claire Wang <claire@tailscale.com>	1 year ago
David Anderson	ed50f360db	util/lru: update c.head when deleting the most recently used entry Fixes tailscale/corp#14747 Signed-off-by: David Anderson <danderson@tailscale.com> Co-authored-by: Brad Fitzpatrick <bradfitz@tailscale.com> Signed-off-by: David Anderson <danderson@tailscale.com>	1 year ago
Brad Fitzpatrick	dc7aa98b76	all: use set.Set consistently instead of map[T]struct{} I didn't clean up the more idiomatic map[T]bool with true values, at least yet. I just converted the relatively awkward struct{}-valued maps. Updates #cleanup Change-Id: I758abebd2bb1f64bc7a9d0f25c32298f4679c14f Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
David Anderson	95082a8dde	util/lru, util/limiter: add debug helper to dump state as HTML For use in tsweb debug handlers, so that we can easily inspect cache and limiter state when troubleshooting. Updates tailscale/corp#3601 Signed-off-by: David Anderson <danderson@tailscale.com>	1 year ago
Craig Rodrigues	8452d273e3	util/linuxfw: Fix comment which lists supported linux arches Only arm64 and amd64 are supported Signed-off-by: Craig Rodrigues <rodrigc@crodrigues.org>	1 year ago
David Anderson	0909e90890	util/lru: replace container/list with a custom ring implementation pre-generics container/list is quite unpleasant to use, and the pointer manipulation operations for an LRU are simple enough to implement directly now that we have generic types. With this change, the LRU uses a ring (aka circularly linked list) rather than a simple doubly-linked list as its internals, because the ring makes list manipulation edge cases more regular: the only remaining edge case is the transition between 0 and 1 elements, rather than also having to deal specially with manipulating the first and last members of the list. While the primary purpose was improved readability of the code, as it turns out removing the indirection through an interface box also speeds up the LRU: │ before.txt │ after.txt │ │ sec/op │ sec/op vs base │ LRU-32 67.05n ± 2% 59.73n ± 2% -10.90% (p=0.000 n=20) │ before.txt │ after.txt │ │ B/op │ B/op vs base │ LRU-32 21.00 ± 0% 10.00 ± 0% -52.38% (p=0.000 n=20) │ before.txt │ after.txt │ │ allocs/op │ allocs/op vs base │ LRU-32 0.000 ± 0% 0.000 ± 0% ~ (p=1.000 n=20) ¹ Updates #cleanup Signed-off-by: David Anderson <danderson@tailscale.com>	1 year ago
David Anderson	472eb6f6f5	util/lru: add a microbenchmark The benchmark simulates an LRU being queries with uniformly random inputs, in a set that's too large for the LRU, which should stress the eviction codepath. Signed-off-by: David Anderson <danderson@tailscale.com>	1 year ago
David Anderson	96c2cd2ada	util/limiter: add a keyed token bucket rate limiter Updates tailscale/corp#3601 Signed-off-by: David Anderson <danderson@tailscale.com>	1 year ago
Anton Tolchanov	86b0fc5295	util/cmpver: add a few tests covering different OS versions Updates tailscale/corp#14491 Signed-off-by: Anton Tolchanov <anton@tailscale.com>	1 year ago
Brad Fitzpatrick	7175f06e62	util/rands: add package with HexString func We use it a number of places in different repos. Might as well make one. Another use is coming. Updates #cleanup Change-Id: Ib7ce38de0db35af998171edee81ca875102349a4 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago

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389 Commits (3b70968c256979a1f08ff02f716c058729ad69c2)