tailscale

Commit Graph

Author	SHA1	Message	Date
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>	10 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	10 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>	10 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>	10 months ago
Joe Tsai	efddad7d7d	util/deephash: cleanup TODO in TestHash (#11080 ) Updates #cleanup Signed-off-by: Joe Tsai <joetsai@digital-static.net>	10 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>	10 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>	10 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>	10 months ago
Joe Tsai	84f8311bcd	util/deephash: document pathological deephash behavior (#11010 ) Updates #cleanup Signed-off-by: Joe Tsai <joetsai@digital-static.net>	10 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>	10 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>	11 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>	11 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>	12 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>	12 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>	12 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	12 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>	12 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>	12 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>	12 months ago
Claire Wang	47db67fef5	util/syspolicy: add policy counters (#10471 ) Fixes tailscale/corp#16138 Signed-off-by: Claire Wang <claire@tailscale.com>	12 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>	12 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>	12 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>	1 year 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>	1 year 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	1 year 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>	1 year 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>	1 year 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
Craig Rodrigues	8683ce78c2	client/web, clientupdate, util/linuxfw, wgengine/magicsock: Use %v verb for errors Replace %w verb with %v verb when logging errors. Use %w only for wrapping errors with fmt.Errorf() Fixes: #9213 Signed-off-by: Craig Rodrigues <rodrigc@crodrigues.org>	1 year ago
Maisem Ali	306b85b9a3	cmd/k8s-operator: add metrics to track usage Updates #502 Signed-off-by: Maisem Ali <maisem@tailscale.com>	1 year ago
Brad Fitzpatrick	4af22f3785	util/deephash: add IncludeFields, ExcludeFields HasherForType Options Updates tailscale/corp#6198 Change-Id: Iafc18c5b947522cf07a42a56f35c0319cc7b1c94 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Aaron Klotz	6b6a8cf843	util/osdiag: add query for Windows page file configuration and status It's very common for OOM crashes on Windows to be caused by lack of page file space (the NT kernel does not overcommit). Since Windows automatically manages page file space by default, unless the machine is out of disk space, this is typically caused by manual page file configurations that are too small. This patch obtains the current page file size, the amount of free page file space, and also determines whether the page file is automatically or manually managed. Fixes #9090 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	1 year ago
Aaron Klotz	5fb1695bcb	util/osdiag, util/osdiag/internal/wsc: add code to probe the Windows Security Center for installed software The Windows Security Center is a component that manages the registration of security products on a Windows system. Only products that have obtained a special cert from Microsoft may register themselves using the WSC API. Practically speaking, most vendors do in fact sign up for the program as it enhances their legitimacy. From our perspective, this is useful because it gives us a high-signal source of information to query for the security products installed on the system. I've tied this query into the osdiag package and is run during bugreports. It uses COM bindings that were automatically generated by my prototype metadata processor, however that program still has a few bugs, so I had to make a few manual tweaks. I dropped those binding into an internal package because (for the moment, at least) they are effectively purpose-built for the osdiag use case. We also update the wingoes dependency to pick up BSTR. Fixes #10646 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	1 year ago
Aaron Klotz	ea693eacb6	util/winutil: add RegisterForRestart, allowing programs to indicate their preferences to the Windows restart manager In order for the installer to restart the GUI correctly post-upgrade, we need the GUI to be able to register its restart preferences. This PR adds API support for doing so. I'm adding it to OSS so that it is available should we need to do any such registrations on OSS binaries in the future. Updates https://github.com/tailscale/corp/issues/13998 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	1 year ago
Brad Fitzpatrick	1b223566dd	util/linuxfw: fix typo in unexported doc comment And flesh it out and use idiomatic doc style ("whether" for bools) and end in a period while there anyway. Updates #cleanup Change-Id: Ieb82f13969656e2340c3510e7b102dc8e6932611 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Brad Fitzpatrick	f35ff84ee2	util/deephash: relax an annoyingly needy test I'd added a test case of deephash against a tailcfg.Node to make sure it worked at all more than anything. We don't care what the exact bytes are in this test, just that it doesn't fail. So adjust for that. Then when we make changes to tailcfg.Node and types under it, we don't need to keep adjusting this test. Updates #cleanup Change-Id: Ibf4fa42820aeab8f5292fe65f9f92ffdb0b4407b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
KevinLiang10	b040094b90	util/linuxfw: reorganize nftables rules to allow it to work with ufw This commit tries to mimic the way iptables-nft work with the filewall rules. We follow the convention of using tables like filter, nat and the conventional chains, to make our nftables implementation work with ufw. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>	1 year ago
Brad Fitzpatrick	bc0eb6b914	all: import x/exp/maps as xmaps to distinguish from Go 1.21 "maps" Updates #8419 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Brad Fitzpatrick	e8551d6b40	all: use Go 1.21 slices, maps instead of x/exp/{slices,maps} Updates #8419 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Aaron Klotz	c17a817769	util/osdiag: add logging for winsock layered service providers to Windows bugreports The Layered Service Provider (LSP) is a deprecated (but still supported) mechanism for inserting user-mode DLLs into a filter chain between the Winsock API surface (ie, ws2_32.dll) and the internal user-mode interface to the networking stack. While their use is becoming more rare due to the aforementioned deprecation, it is still possible for third-party software to install their DLLs into this filter chain and interfere with Winsock API calls. Knowing whether this is happening is useful for troubleshooting. Fixes https://github.com/tailscale/tailscale/issues/8142 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	1 year ago
Aaron Klotz	b07347640c	util/winutil/authenticode: add missing docs for CertSubjectError A #cleanup PR. Signed-off-by: Aaron Klotz <aaron@tailscale.com>	1 year ago
Brad Fitzpatrick	7a5263e6d0	util/linuxfw: rename ErrorFWModeNotSupported Go style is for error variables to start with "err" (or "Err") and for error types to end in "Error". Updates #cleanup Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Aaron Klotz	3d2e35c053	util/winutil/authenticode: fix an inaccurate doc comment A #cleanup PR Signed-off-by: Aaron Klotz <aaron@tailscale.com>	1 year ago
Brad Fitzpatrick	66f27c4beb	all: require Go 1.21 Updates #8419 Change-Id: I809b6a4d59d92a2ab6ec587ccbb9053376bf02c2 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Maisem Ali	682fd72f7b	util/testenv: add new package to hold InTest Removes duplicated code. Updates #cleanup Signed-off-by: Maisem Ali <maisem@tailscale.com>	1 year ago
KevinLiang10	ae63c51ff1	wgengine/router: add auto selection heuristic for iptables/nftables This commit replaces the TS_DEBUG_USE_NETLINK_NFTABLES envknob with a TS_DEBUG_FIREWALL_MODE that should be set to either 'iptables' or 'nftables' to select firewall mode manually, other wise tailscaled will automatically choose between iptables and nftables depending on environment and system availability. updates: #319 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>	1 year ago
Aaron Klotz	37925b3e7a	go.mod, cmd/tailscaled, ipn/localapi, util/osdiag, util/winutil, util/winutil/authenticode: add Windows module list to OS-specific logs that are written upon bugreport * We update wingoes to pick up new version information functionality (See pe/version.go in the https://github.com/dblohm7/wingoes repo); * We move the existing LogSupportInfo code (including necessary syscall stubs) out of util/winutil into a new package, util/osdiag, and implement the public LogSupportInfo function may be implemented for other platforms as needed; * We add a new reason argument to LogSupportInfo and wire that into localapi's bugreport implementation; * We add module information to the Windows implementation of LogSupportInfo when reason indicates a bugreport. We enumerate all loaded modules in our process, and for each one we gather debug, authenticode signature, and version information. Fixes #7802 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	1 year ago
Aaron Klotz	7adf15f90e	cmd/tailscale/cli, util/winutil/authenticode: flesh out authenticode support Previously, tailscale upgrade was doing the bare minimum for checking authenticode signatures via `WinVerifyTrustEx`. This is fine, but we can do better: * WinVerifyTrustEx verifies that the binary's signature is valid, but it doesn't determine whose signature is valid; tailscale upgrade should also ensure that the binary is actually signed by us. * I added the ability to check the signatures of MSI files. * In future PRs I will be adding diagnostic logging that lists details about every module (ie, DLL) loaded into our process. As part of that metadata, I want to be able to extract information about who signed the binaries. This code is modelled on some C++ I wrote for Firefox back in the day. See https://searchfox.org/mozilla-central/rev/27e4816536c891d85d63695025f2549fd7976392/toolkit/xre/dllservices/mozglue/Authenticode.cpp for reference. Fixes #8284 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	1 year ago

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369 Commits (dcb0f189cc774e23b149d283fa16233217e754cf)