tailscale

Commit Graph

Author	SHA1	Message	Date
Nick Khyl	892f8a9582	various: allow tailscaled shutdown via LocalAPI A customer wants to allow their employees to restart tailscaled at will, when access rights and MDM policy allow it, as a way to fully reset client state and re-create the tunnel in case of connectivity issues. On Windows, the main tailscaled process runs as a child of a service process. The service restarts the child when it exits (or crashes) until the service itself is stopped. Regular (non-admin) users can't stop the service, and allowing them to do so isn't ideal, especially in managed or multi-user environments. In this PR, we add a LocalAPI endpoint that instructs ipnserver.Server, and by extension the tailscaled process, to shut down. The service then restarts the child tailscaled. Shutting down tailscaled requires LocalAPI write access and an enabled policy setting. Updates tailscale/corp#32674 Updates tailscale/corp#32675 Signed-off-by: Nick Khyl <nickk@tailscale.com>	2 months ago
Nick Khyl	f0a27066c4	ipn/ipn{server,test}: extract the LocalAPI test client and server into ipntest In this PR, we extract the in-process LocalAPI client/server implementation from ipn/ipnserver/server_test.go into a new ipntest package to be used in high‑level black‑box tests, such as those for the tailscale CLI. Updates #15575 Signed-off-by: Nick Khyl <nickk@tailscale.com>	7 months ago
David Anderson	5399fa159a	net/netmon: publish events to event bus Updates #15160 Signed-off-by: David Anderson <dave@tailscale.com>	8 months ago
M. J. Fromberger	deb0b255ff	all: update the tsd.System constructor name (#15372 ) Replace NewSystemWithEventBus with plain NewSystem, and update all usage. See https://github.com/tailscale/tailscale/pull/15355#discussion_r2003910766 Updates #15160 Change-Id: I64d337f09576b41d9ad78eba301a74b9a9d6ebf4 Signed-off-by: M. J. Fromberger <fromberger@tailscale.com>	8 months ago
M. J. Fromberger	ffb22ee353	all: construct new System values with an event bus pre-populated Although, at the moment, we do not yet require an event bus to be present, as we start to add more pieces we will want to ensure it is always available. Add a new constructor and replace existing uses of new(tsd.System) throughout. Update generated files for import changes. Updates #15160 Change-Id: Ie5460985571ade87b8eac8b416948c7f49f0f64b Signed-off-by: M. J. Fromberger <fromberger@tailscale.com>	8 months ago
Brad Fitzpatrick	05ac21ebe4	all: use new LocalAPI client package location It was moved in `f57fa3cbc3`. Updates tailscale/corp#22748 Change-Id: I19f965e6bded1d4c919310aa5b864f2de0cd6220 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	10 months ago
Nick Khyl	0481042738	ipn/ipnserver: fix a deadlock in (*Server).blockWhileIdentityInUse If the server was in use at the time of the initial check, but disconnected and was removed from the activeReqs map by the time we registered a waiter, the ready channel will never be closed, resulting in a deadlock. To avoid this, we check whether the server is still busy after registering the wait. Fixes #14655 Signed-off-by: Nick Khyl <nickk@tailscale.com>	11 months ago
Nick Khyl	62fb857857	ipn/ipnserver: fix TestConcurrentOSUserSwitchingOnWindows I made a last-minute change in #14626 to split a single loop that created 1_000 concurrent connections into an inner and outer loop that create 100 concurrent connections 10 times. This introduced a race because the last user's connection may still be active (from the server's perspective) when a new outer iteration begins. Since every new client gets a unique ClientID, but we reuse usernames and UIDs, the server may let a user in (as the UID matches, which is fine), but the test might then fail due to a ClientID mismatch: server_test.go:232: CurrentUser(Initial): got &{S-1-5-21-1-0-0-1001 User-4 <nil> Client-2 false false}; want &{S-1-5-21-1-0-0-1001 User-4 <nil> Client-114 false false} In this PR, we update (*testIPNServer).blockWhileInUse to check whether the server is currently busy and wait until it frees up. We then call blockWhileInUse at the end of each outer iteration so that the server is always in a known idle state at the beginning of the inner loop. We also check that the current user is not set when the server is idle. Updates tailscale/corp#25804 Updates #14655 (found when working on it) Signed-off-by: Nick Khyl <nickk@tailscale.com>	11 months ago
Nick Khyl	6fac2903e1	ipn/ipnserver: fix race condition where LocalBackend is reset after a different user connects In this commit, we add a failing test to verify that ipn/ipnserver.Server correctly sets and unsets the current user when two different clients send requests concurrently (A sends request, B sends request, A's request completes, B's request completes). The expectation is that the user who wins the race becomes the current user from the LocalBackend's perspective, remaining in this state until they disconnect, after which a different user should be able to connect and use the LocalBackend. We then fix the second of two bugs in (*Server).addActiveHTTPRequest, where a race condition causes the LocalBackend's state to be reset after a new client connects, instead of after the last active request of the previous client completes and the server becomes idle. Fixes tailscale/corp#25804 Signed-off-by: Nick Khyl <nickk@tailscale.com>	11 months ago
Nick Khyl	f33f5f99c0	ipn/{ipnlocal,ipnserver}: remove redundant (LocalBackend).ResetForClientDisconnect In this commit, we add a failing test to verify that ipn/ipnserver.Server correctly sets and unsets the current user when two different users connect sequentially (A connects, A disconnects, B connects, B disconnects). We then fix the test by updating (ipn/ipnserver.Server).addActiveHTTPRequest to avoid calling (LocalBackend).ResetForClientDisconnect again after a new user has connected and been set as the current user with (LocalBackend).SetCurrentUser(). Since ipn/ipnserver.Server does not allow simultaneous connections from different Windows users and relies on the LocalBackend's current user, and since we already reset the LocalBackend's state by calling ResetForClientDisconnect when the last active request completes (indicating the server is idle and can accept connections from any Windows user), it is unnecessary to track the last connected user on the ipnserver.Server side or call ResetForClientDisconnect again when the user changes. Additionally, the second call to ResetForClientDisconnect occurs after the new user has been set as the current user, resetting the correct state for the new user instead of the old state of the now-disconnected user, causing issues. Updates tailscale/corp#25804 Signed-off-by: Nick Khyl <nickk@tailscale.com>	11 months ago
Nick Khyl	c3c4c96489	ipn/{ipnauth,ipnlocal,ipnserver}, client/tailscale: make ipnserver.Server testable We update client/tailscale.LocalClient to allow specifying an optional Transport (http.RoundTripper) for LocalAPI HTTP requests, and implement one that injects an ipnauth.TestActor via request headers. We also add several functions and types to make testing an ipn/ipnserver.Server possible (or at least easier). We then use these updates to write basic tests for ipnserver.Server, ensuring it works on non-Windows platforms and correctly sets and unsets the LocalBackend's current user when a Windows user connects and disconnects. We intentionally omit tests for switching between different OS users and will add them in follow-up commits. Updates tailscale/corp#25804 Signed-off-by: Nick Khyl <nickk@tailscale.com>	11 months 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>	3 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>	3 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>	3 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>	4 years ago
Josh Bleecher Snyder	0868329936	all: use any instead of interface{} My favorite part of generics. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 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>	4 years ago
Josh Bleecher Snyder	63cd581c3f	safesocket: add ConnectionStrategy, provide control over fallbacks `fee2d9fad` added support for cmd/tailscale to connect to IPNExtension. It came in two parts: If no socket was provided, dial IPNExtension first, and also, if dialing the socket failed, fall back to IPNExtension. The second half of that support caused the integration tests to fail when run on a machine that was also running IPNExtension. The integration tests want to wait until the tailscaled instances that they spun up are listening. They do that by dialing the new instance. But when that dial failed, it was falling back to IPNExtension, so it appeared (incorrectly) that tailscaled was running. Hilarity predictably ensued. If a user (or a test) explicitly provides a socket to dial, it is a reasonable assumption that they have a specific tailscaled in mind and don't want to fall back to IPNExtension. It is certainly true of the integration tests. Instead of adding a bool to Connect, split out the notion of a connection strategy. For now, the implementation remains the same, but with the details hidden a bit. Later, we can improve that. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	adc5997592	net/tsdial: give netstack a Dialer, start refactoring name resolution This starts to refactor tsdial.Dialer's name resolution to have different stages: in-memory MagicDNS vs system resolution. A future change will plug in ExitDNS resolution. This also plumbs a Dialer into netstack and unexports the dnsMap internals. And it removes some of the async AddNetworkMapCallback usage and replaces it with synchronous updates of the Dialer's netmap from LocalBackend, since the LocalBackend has the Dialer too. Updates #3475 Change-Id: Idcb7b1169878c74f0522f5151031ccbc49fe4cb4 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	c7fb26acdb	net/tsdial: also plumb TUN name and monitor into tsdial.Dialer In prep for moving stuff out of LocalBackend. Change-Id: I9725aa9c3ebc7275f8c40e040b326483c0340127 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Brad Fitzpatrick	e6fbc0cd54	cmd/tailscaled, ipn/ipnserver: refactor ipnserver More work towards removing the massive ipnserver.Run and ipnserver.Options and making composable pieces. Work remains. (The getEngine retry loop on Windows complicates things.) For now some duplicate code exists. Once the Windows side is fixed to either not need the retry loop or to move the retry loop into a custom wgengine.Engine wrapper, then we can unify tailscaled_windows.go too. Change-Id: If84d16e3cd15b54ead3c3bb301f27ae78d055f80 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	4 years ago
Josh Bleecher Snyder	7693d36aed	all: close fake userspace engines when tests complete We were leaking FDs. In a few places, switch from defer to t.Cleanup. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	4 years ago
Brad Fitzpatrick	38dc6fe758	cmd/tailscaled, wgengine: remove --fake, replace with netstack And add a --socks5-server flag. And fix a race in SOCKS5 replies where the response header was written concurrently with the copy from the backend. Co-authored with Naman Sood. Updates #707 Updates #504 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
Brad Fitzpatrick	5aa5db89d6	cmd/tailscaled, wgengine/netstack: add start of gvisor userspace netstack work Not usefully functional yet (mostly a proof of concept), but getting it submitted for some work @namansood is going to do atop this. Updates #707 Updates #634 Updates #48 Updates #835	5 years ago
Josh Bleecher Snyder	585a0d8997	all: use testing.T.TempDir Bit of Friday cleanup. Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>	5 years ago
Brad Fitzpatrick	4aba86cc03	ipn/ipnserver: make Engine argument a func that tries again for each connection So a backend in server-an-error state (as used by Windows) can try to create a new Engine again each time somebody re-connects, relaunching the GUI app. (The proper fix is actually fixing Windows issues, but this makes things better in the short term) Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	5 years ago
Wendi Yu	bb55694c95	wgengine: log node IDs when peers are added/removed (#381 ) Also stop logging data sent/received from nodes we're not connected to (ie all those `x`s being logged in the `peers: ` line) Signed-off-by: Wendi <wendi.yu@yahoo.ca>	6 years ago
Wendi Yu	0c69b4e00d	Implement rate limiting on log messages (#356 ) Implement rate limiting on log messages Addresses issue #317, where logs can get spammed with the same message nonstop. Created a rate limiting closure on logging functions, which limits the number of messages being logged per second based on format string. To keep memory usage as constant as possible, the previous cache purging at periodic time intervals has been replaced by an LRU that discards the oldest string when the capacity of the cache is reached. Signed-off-by: Wendi Yu <wendi.yu@yahoo.ca>	6 years ago
Brad Fitzpatrick	06092a3af3	ipn/ipnserver: document potential race, start on test for it	6 years ago

29 Commits (alexc/tailscale-lock-status-json)