140 Commits (6ab39b7bcd259a7cf4adb9331586a64698c85dcc)

Author	SHA1	Message	Date
Nick Khyl	e7b5e8c8cd	ipn/ipnserver: remove IdleTimeout ... We no longer need this on Windows, and it was never required on other platforms. It just results in more short-lived connections unless we use HTTP/2. Updates tailscale/corp#18342 Signed-off-by: Nick Khyl <nickk@tailscale.com>	2 months ago
Nick Khyl	961ee321e8	ipn/{ipnauth,ipnlocal,ipnserver,localapi}: start baby step toward moving access checks from the localapi.Handler to the LocalBackend ... Currently, we use PermitRead/PermitWrite/PermitCert permission flags to determine which operations are allowed for a LocalAPI client. These checks are performed when localapi.Handler handles a request. Additionally, certain operations (e.g., changing the serve config) requires the connected user to be a local admin. This approach is inherently racey and is subject to TOCTOU issues. We consider it to be more critical on Windows environments, which are inherently multi-user, and therefore we prevent more than one OS user from connecting and utilizing the LocalBackend at the same time. However, the same type of issues is also applicable to other platforms when switching between profiles that have different OperatorUser values in ipn.Prefs. We'd like to allow more than one Windows user to connect, but limit what they can see and do based on their access rights on the device (e.g., an local admin or not) and to the currently active LoginProfile (e.g., owner/operator or not), while preventing TOCTOU issues on Windows and other platforms. Therefore, we'd like to pass an actor from the LocalAPI to the LocalBackend to represent the user performing the operation. The LocalBackend, or the profileManager down the line, will then check the actor's access rights to perform a given operation on the device and against the current (and/or the target) profile. This PR does not change the current permission model in any way, but it introduces the concept of an actor and includes some preparatory work to pass it around. Temporarily, the ipnauth.Actor interface has methods like IsLocalSystem and IsLocalAdmin, which are only relevant to the current permission model. It also lacks methods that will actually be used in the new model. We'll be adding these gradually in the next PRs and removing the deprecated methods and the Permit* flags at the end of the transition. Updates tailscale/corp#18342 Signed-off-by: Nick Khyl <nickk@tailscale.com>	2 months ago
Brad Fitzpatrick	c6af5bbfe8	all: add test for package comments, fix, add comments as needed ... Updates #cleanup Change-Id: Ic4304e909d2131a95a38b26911f49e7b1729aaef Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 months ago
Brad Fitzpatrick	727c0d6cfd	ipn/ipnserver: close a small race in ipnserver, ~simplify code ... There was a small window in ipnserver after we assigned a LocalBackend to the ipnserver's atomic but before we Start'ed it where our initalization Start could conflict with API calls from the LocalAPI. Simplify that a bit and lay out the rules in the docs. Updates #12028 Change-Id: Ic5f5e4861e26340599184e20e308e709edec68b1 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	6 months ago
Brad Fitzpatrick	6d69fc137f	ipn/{ipnlocal,localapi},wgengine{,/magicsock}: plumb health.Tracker ... Down to 25 health.Global users. After this remains controlclient & net/dns & wgengine/router. Updates #11874 Updates #4136 Change-Id: I6dd1856e3d9bf523bdd44b60fb3b8f7501d5dc0d Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	6 months ago
Brad Fitzpatrick	7c1d6e35a5	all: use Go 1.22 range-over-int ... Updates #11058 Change-Id: I35e7ef9b90e83cac04ca93fd964ad00ed5b48430 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	7 months ago
Will Norris	236531c5fc	ipn/ipnserver: always allow Windows SYSTEM user to connect ... When establishing connections to the ipnserver, we validate that the local user is allowed to connect. If Tailscale is currently being managed by a different user (primarily for multi-user Windows installs), we don't allow the connection. With the new device web UI, the inbound connection is coming from tailscaled itself, which is often running as "NT AUTHORITY\SYSTEM". In this case, we still want to allow the connection, even though it doesn't match the user running the Tailscale GUI. The SYSTEM user has full access to everything on the system anyway, so this doesn't escalate privileges. Eventually, we want the device web UI to run outside of the tailscaled process, at which point this exception would probably not be needed. Updates tailscale/corp#16393 Signed-off-by: Will Norris <will@tailscale.com>	10 months ago
Andrew Lytvynov	55cd5c575b	ipn/localapi: only perform local-admin check in serveServeConfig (#10163) ... On unix systems, the check involves executing sudo, which is slow. Instead of doing it for every incoming request, move the logic into localapi serveServeConfig handler and do it as needed. Updates tailscale/corp#15405 Signed-off-by: Andrew Lytvynov <awly@tailscale.com>	12 months ago
Andrew Lytvynov	9b158db2c6	ipn/localapi: require root or sudo+operator access for SetServeConfig (#10142) ... For an operator user, require them to be able to `sudo tailscale` to use `tailscale serve`. This is similar to the Windows elevated token check. Updates tailscale/corp#15405 Signed-off-by: Andrew Lytvynov <awly@tailscale.com>	12 months 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
Aaron Klotz	95671b71a6	ipn, safesocket: use Windows token in LocalAPI ... On Windows, the idiomatic way to check access on a named pipe is for the server to impersonate the client on its current OS thread, perform access checks using the client's access token, and then revert the OS thread's access token back to its true self. The access token is a better representation of the client's rights than just a username/userid check, as it represents the client's effective rights at connection time, which might differ from their normal rights. This patch updates safesocket to do the aforementioned impersonation, extract the token handle, and then revert the impersonation. We retain the token handle for the remaining duration of the connection (the token continues to be valid even after we have reverted back to self). Since the token is a property of the connection, I changed ipnauth to wrap the concrete net.Conn to include the token. I then plumbed that change through ipnlocal, ipnserver, and localapi as necessary. I also added a PermitLocalAdmin flag to the localapi Handler which I intend to use for controlling access to a few new localapi endpoints intended for configuring auto-update. Updates https://github.com/tailscale/tailscale/issues/755 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	1 year ago
Brad Fitzpatrick	6e967446e4	tsd: add package with System type to unify subsystem init, discovery ... This is part of an effort to clean up tailscaled initialization between tailscaled, tailscaled Windows service, tsnet, and the mac GUI. Updates #8036 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Mihai Parparita	7330aa593e	all: avoid repeated default interface lookups ... On some platforms (notably macOS and iOS) we look up the default interface to bind outgoing connections to. This is both duplicated work and results in logspam when the default interface is not available (i.e. when a phone has no connectivity, we log an error and thus cause more things that we will try to upload and fail). Fixed by passing around a netmon.Monitor to more places, so that we can use its cached interface state. Fixes #7850 Updates #7621 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Will Norris	57a008a1e1	all: pass log IDs as the proper type rather than strings ... This change focuses on the backend log ID, which is the mostly commonly used in the client. Tests which don't seem to make use of the log ID just use the zero value. Signed-off-by: Will Norris <will@tailscale.com>	2 years ago
Will Norris	71029cea2d	all: update copyright and license headers ... 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>	2 years ago
Anton Tolchanov	53c4892841	ipn/ipnserver: propagate http.Serve error ... This ensures that we capture error returned by `Serve` and exit with a non-zero exit code if it happens. Signed-off-by: Anton Tolchanov <anton@tailscale.com>	2 years ago
Brad Fitzpatrick	964d723aba	ipn/{ipnserver,localapi}: fix InUseOtherUser handling with WatchIPNBus ... Updates tailscale/corp#8222 Change-Id: I2d6fa6514c7b8d0f89fded35a2d44e7df27e6fb1 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	3b0de97e07	cmd/tailscaled: unify the two Windows paths + separate IPN server path ... tailscaled on Windows had two entirely separate start-up paths for running as a service vs in the foreground. It's been causing problems for ages. This unifies the two paths, making them be the same as the path used for every other platform. Also, it uses the new async LocalBackend support in ipnserver.Server so the Server can start serving HTTP immediately, even if tun takes awhile to come up. Updates #6535 Change-Id: Icc8c4f96d4887b54a024d7ac15ad11096b5a58cf Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	e8cc78b1af	ipn/ipnserver: change Server to let LocalBackend be supplied async ... This is step 1 of de-special-casing of Windows and letting the LocalAPI HTTP server start serving immediately, even while the rest of the world (notably the Engine and its TUN device) are being created, which can take a few to dozens of seconds on Windows. With this change, the ipnserver.New function changes to not take an Engine and to return immediately, not returning an error, and let its Run run immediately. If its ServeHTTP is called when it doesn't yet have a LocalBackend, it returns an error. A TODO in there shows where a future handler will serve status before an engine is available. Future changes will: * delete a bunch of tailscaled_windows.go code and use this new API * add the ipnserver.Server ServerHTTP handler to await the engine being available * use that handler in the Windows GUI client Updates #6522 Change-Id: Iae94e68c235e850b112a72ea24ad0e0959b568ee Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	8049053f86	ipn/*: make new WindowsUserID type to consolidate docs ... The "userID is empty everywhere but Windows" docs on lots of places but not everywhere while using just a string type was getting confusing. This makes a new type to wrap up those rules, however weird/historical they might be. Change-Id: I142e85a8e38760988d6c0c91d0efecedade81b9b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	f45106d47c	ipn/ipnserver: move Windows-specific code to tailscaled_windows.go ... We'll eventually remove it entirely, but for now move get it out of ipnserver where it's distracting and move it to its sole caller. Updates #6522 Change-Id: I9c6f6a91bf9a8e3c5ea997952b7c08c81723d447 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	b0545873e5	ipn/ipnserver: remove protoSwitchConn shenanigans; just use http.Server early ... Now that everything's just HTTP, there's no longer a need to have a header-sniffing net.Conn wraper that dispatches which route to take. Refactor to just use an http.Server earlier instead. Updates #6417 Change-Id: I12a2054db4e56f48660c46f81233db224fdc77cb Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	f3ba268a96	ipn/ipnserver: move BabysitProc to tailscaled_windows.go ... It's only used by Windows. No need for it to be in ipn/ipnserver, which we're trying to trim down. Change-Id: Idf923ac8b6cdae8b5338ec26c16fb8b5ea548071 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	7e016c1d90	ipn/ipnserver: remove IPN protocol server ... Unused in this repo as of the earlier #6450 (300aba61a6) and unused in the Windows GUI as of tailscale/corp#8065. With this ipn.BackendServer is no longer used and could also be removed from this repo. The macOS and iOS clients still temporarily depend on it, but I can move it to that repo instead while and let its migration proceed on its own schedule while we clean this repo up. Updates #6417 Updates tailscale/corp#8051 Change-Id: Ie13f82af3eb9f96b3a21c56cdda51be31ddebdcf Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	0a842f353c	ipn/ipnserver: move more connection acceptance logic to LocalBackend ... Follow-up to #6467 and #6506. LocalBackend knows the server-mode state, so move more auth checking there, removing some bookkeeping from ipnserver.Server. Updates #6417 Updates tailscale/corp#8051 Change-Id: Ic5d14a077bf0dccc92a3621bd2646bab2cc5b837 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	5ea7c7d603	ipn/{ipnlocal,ipnserver}: add some comments ... Change-Id: Ieb5917edaf572342b755caa458693512c7aece81 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Maisem Ali	a3cd171773	ipn/ipnserver: remove Server.serverModeUser ... We can just rely on LocalBackend.CurrentUser Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Brad Fitzpatrick	250edeb3da	ipn/ipnserver: only permit the pre-HTTP LocalAPI protocol on Windows ... Updates #6417 Change-Id: I1c9dbee3f72969f703b3ff2dbbaa145a17db868b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	7bff7345cc	ipn/ipnauth: start splitting ipnserver into new ipnauth package ... We're trying to gut 90% of the ipnserver package. A lot will get deleted, some will move to LocalBackend, and a lot is being moved into this new ipn/ipnauth package which will be leaf-y and testable. This is a baby step towards moving some stuff to ipnauth. Update #6417 Updates tailscale/corp#8051 Change-Id: I28bc2126764f46597d92a2d72565009dc6927ee0 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Tom DNetto	2a991a3541	ipn/{localapi,ipnserver}: set a CSP for ServeHTMLStatus, refactor host check ... Signed-off-by: Tom DNetto <tom@tailscale.com>	2 years ago
Brad Fitzpatrick	f18dde6ad1	ipn/ipnserver: validate Host header on debug ServeHTMLStatus status ... Updates tailscale/corp#7948 Change-Id: I3a8c64f353af1eeae620812b2700ce4af4fbbc88 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Maisem Ali	235309adc4	all: store NL keys per profile ... This moves the NetworkLock key from a dedicated StateKey to be part of the persist.Persist struct. This struct is stored as part for ipn.Prefs and is also the place where we store the NodeKey. It also moves the ChonkDir from "/tka" to "/tka-profile/<profile-id>". The rename was intentional to be able to delete the "/tka" dir if it exists. This means that we will have a unique key per profile, and a unique directory per profile. Note: `tailscale logout` will delete the entire profile, including any keys. It currently does not delete the ChonkDir. Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	4d330bac14	ipn/ipnlocal: add support for multiple user profiles ... Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Josh Soref	d4811f11a0	all: fix spelling mistakes ... Signed-off-by: Josh Soref <2119212+jsoref@users.noreply.github.com>	2 years ago
Tom DNetto	e9b98dd2e1	control/controlclient,ipn/ipnlocal: wire tka enable/disable ... Signed-off-by: Tom DNetto <tom@tailscale.com>	2 years ago
Brad Fitzpatrick	65c24b6334	envknob: generalize Windows tailscaled-env.txt support ... ipnserver previously had support for a Windows-only environment variable mechanism that further only worked when Windows was running as a service, not from a console. But we want it to work from tailscaed too, and we want it to work on macOS and Synology. So move it to envknob, now that envknob can change values at runtime post-init. A future change will wire this up for more platforms, and do something more for CLI flags like --port, which the bug was originally about. Updates #5114 Change-Id: I9fd69a9a91bb0f308fc264d4a6c33e0cbe352d71 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Eng Zer Jun	f0347e841f	refactor: move from io/ioutil to io and os packages ... The io/ioutil package has been deprecated as of Go 1.16 [1]. This commit replaces the existing io/ioutil functions with their new definitions in io and os packages. Reference: https://golang.org/doc/go1.16#ioutil Signed-off-by: Eng Zer Jun <engzerjun@gmail.com>	2 years ago
Andrew Dunham	b8596f2a2f	net/dnsfallback: cache most recent DERP map on disk (#5545) ... This is especially helpful as we launch newer DERPs over time, and older clients have progressively out-of-date static DERP maps baked in. After this, as long as the client has successfully connected once, it'll cache the most recent DERP map it knows about. Resolves an in-code comment from @bradfitz Signed-off-by: Andrew Dunham <andrew@du.nham.ca>	2 years ago
Tom DNetto	79905a1162	tka: make storage a parameter rather than an Authority struct member ... Updates #5435 Based on the discussion in #5435, we can better support transactional data models by making the underlying storage layer a parameter (which can be specialized for the request) rather than a long-lived member of Authority. Now that Authority is just an instantaneous snapshot of state, we can do things like provide idempotent methods and make it cloneable, too. Signed-off-by: Tom DNetto <tom@tailscale.com>	2 years ago
Tom DNetto	4001d0bf25	assorted: plumb tka initialization & network-lock key into tailscaled ... - A network-lock key is generated if it doesn't already exist, and stored in the StateStore. The public component is communicated to control during registration. - If TKA state exists on the filesystem, a tailnet key authority is initialized (but nothing is done with it for now). Signed-off-by: Tom DNetto <tom@tailscale.com>	2 years ago
Brad Fitzpatrick	a12aad6b47	all: convert more code to use net/netip directly ... perl -i -npe 's,netaddr.IPPrefixFrom,netip.PrefixFrom,' $(git grep -l -F netaddr.) perl -i -npe 's,netaddr.IPPortFrom,netip.AddrPortFrom,' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IPPrefix,netip.Prefix,g' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IPPort,netip.AddrPort,g' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IP\b,netip.Addr,g' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IPv6Raw\b,netip.AddrFrom16,g' $(git grep -l -F netaddr. ) goimports -w . Then delete some stuff from the net/netaddr shim package which is no longer neeed. Updates #5162 Change-Id: Ia7a86893fe21c7e3ee1ec823e8aba288d4566cd8 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	6a396731eb	all: use various net/netip parse funcs directly ... Mechanical change with perl+goimports. Changed {Must,}Parse{IP,IPPrefix,IPPort} to their netip variants, then goimports -d . Finally, removed the net/netaddr wrappers, to prevent future use. Updates #5162 Change-Id: I59c0e38b5fbca5a935d701645789cddf3d7863ad Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	7eaf5e509f	net/netaddr: start migrating to net/netip via new netaddr adapter package ... Updates #5162 Change-Id: Id7bdec303b25471f69d542f8ce43805328d56c12 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Denton Gentry	d17849461c	ipn/{ipnserver,ipnlocal}: support incoming Taildrop on QNAP ... Signed-off-by: Denton Gentry <dgentry@tailscale.com>	2 years ago
Brad Fitzpatrick	a9b4bf1535	ipn/ipnserver, cmd/tailscaled: fix peerapi on Windows ... We weren't wiring up netstack.Impl to the LocalBackend in some cases on Windows. This fixes Windows 7 when run as a service. Updates #4750 (fixes after pull in to corp repo) Change-Id: I9ce51b797710f2bedfa90545776b7628c7528e99 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Josh Bleecher Snyder	9482576bb1	ipn/ipnserver: use strings.Cut ... We now require Go 1.18. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	3 years ago
Maisem Ali	497324ddf6	ipn/store: add common package for instantiating ipn.StateStores ... Also move KubeStore and MemStore into their own package. RELNOTE: tsnet now supports providing a custom ipn.StateStore. Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago
Brad Fitzpatrick	bb94561c96	net/netutil: fix regression where peerapi would get closed after 1st req ... I introduced a bug in 8fe503057d when unifying oneConnListener implementations. The NewOneConnListenerFrom API was easy to misuse (its Close method closes the underlying Listener), and we did (via http.Serve, which closes the listener after use, which meant we were close the peerapi's listener, even though we only wanted its Addr) Instead, combine those two constructors into one and pass in the Addr explicitly, without delegating through to any Listener. Change-Id: I061d7e5f842e0cada416e7b2dd62100d4f987125 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	de72a1f9fc	ipn/ipnserver: let TS_PERMIT_CERT_UID contain a username too, not just uid ... Don't make users map their system's "caddy" (or whatever) system user to its userid. We can do that. Support either a uid or a username. RELNOTE=TS_PERMIT_CERT_UID can contain a uid or username Change-Id: I7451b537a5e118b818addf1353882291d5f0d07f Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Maisem Ali	f9a50779e2	cmd/tailscaled: add `-state=mem:` to support creation of an ephemeral node. ... RELNOTE=`tailscaled --state=mem:` registers as an ephemeral node and does not store state to disk. Signed-off-by: Maisem Ali <maisem@tailscale.com>	3 years ago