tailscale

Commit Graph

Author	SHA1	Message	Date
Andrew Dunham	6da1dc84de	wgengine: fix logger data race in tests Observed in: https://github.com/tailscale/tailscale/actions/runs/8350904950/job/22858266932?pr=11463 Updates #11226 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I9b57db4b34b6ad91d240cd9fa7e344fc0376d52d	8 months ago
Andrew Dunham	7429e8912a	wgengine/netstack: fix bug with duplicate SYN packets in client limit This fixes a bug that was introduced in #11258 where the handling of the per-client limit didn't properly account for the fact that the gVisor TCP forwarder will return 'true' to indicate that it's handled a duplicate SYN packet, but not launch the handler goroutine. In such a case, we neither decremented our per-client limit in the wrapper function, nor did we do so in the handler function, leading to our per-client limit table slowly filling up without bound. Fix this by doing the same duplicate-tracking logic that the TCP forwarder does so we can detect such cases and appropriately decrement our in-flight counter. Updates tailscale/corp#12184 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ib6011a71d382a10d68c0802593f34b8153d06892	8 months ago
Andrew Dunham	f072d017bd	wgengine/magicsock: don't change DERP home when not connected to control This pretty much always results in an outage because peers won't discover our new home region and thus won't be able to establish connectivity. Updates tailscale/corp#18095 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ic0d09133f198b528dd40c6383b16d7663d9d37a7	8 months ago
Andrew Dunham	62cf83eb92	go.mod: bump gvisor The `stack.PacketBufferPtr` type no longer exists; replace it with `*stack.PacketBuffer` instead. Updates #8043 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ib56ceff09166a042aa3d9b80f50b2aa2d34b3683	9 months ago
Andrew Dunham	4338db28f7	wgengine/magicsock: prefer link-local addresses to private ones Since link-local addresses are definitionally more likely to be a direct (lower-latency, more reliable) connection than a non-link-local private address, give those a bit of a boost when selecting endpoints. Updates #8097 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I93fdeb07de55ba39ba5fcee0834b579ca05c2a4e	9 months ago
Brad Fitzpatrick	f18f591bc6	wgengine: plumb the PeerByKey from wgengine to magicsock This was just added in `69f4b459` which doesn't yet use it. This still doesn't yet use it. It just pushes it down deeper into magicsock where it'll used later. Updates #7617 Change-Id: If2f8fd380af150ffc763489e1ff4f8ca2899fac6 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	9 months ago
Percy Wegmann	2d5d6f5403	ipn,wgengine: only intercept TailFS traffic on quad 100 This fixes a regression introduced with `993acf4` and released in v1.60.0. The regression caused us to intercept all userspace traffic to port 8080 which prevented users from exposing their own services to their tailnet at port 8080. Now, we only intercept traffic to port 8080 if it's bound for 100.100.100.100 or fd7a:115c:a1e0::53. Fixes #11283 Signed-off-by: Percy Wegmann <percy@tailscale.com> (cherry picked from commit `17cd0626f3`)	9 months ago
Brad Fitzpatrick	69f4b4595a	wgengine{,/wgint}: add wgint.Peer wrapper type, add to wgengine.Engine This adds a method to wgengine.Engine and plumbed down into magicsock to add a way to get a type-safe Tailscale-safe wrapper around a wireguard-go device.Peer that only exposes methods that are safe for Tailscale to use internally. It also removes HandshakeAttempts from PeerStatusLite that was just added as it wasn't needed yet and is now accessible ala cart as needed from the Peer type accessor. None of this is used yet. Updates #7617 Change-Id: I07be0c4e6679883e6eeddf8dbed7394c9e79c5f4 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	9 months ago
Brad Fitzpatrick	b4ff9a578f	wgengine: rename local variable from 'found' to conventional 'ok' Updates #cleanup Change-Id: I799dc86ea9e4a3a949592abdd8e74282e7e5d086 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	9 months ago
Brad Fitzpatrick	a8a525282c	wgengine: use slices.Clone in two places Updates #cleanup Change-Id: I1cb30efb6d09180e82b807d6146f37897ef99307 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	9 months ago
Brad Fitzpatrick	74b8985e19	ipn/ipnstate, wgengine: make PeerStatusLite.LastHandshake zero Time means none ... rather than 1970. Code was using IsZero against the 1970 team (which isn't a zero value), but fortunately not anywhere that seems to have mattered. Updates #cleanup Change-Id: I708a3f2a9398aaaedc9503678b4a8a311e0e019e Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	9 months ago
Andrew Dunham	3dd8ae2f26	net/tstun: fix spelling of "WireGuard" Updates #cleanup Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ida7e30f4689bc18f5f7502f53a0adb5ac3c7981a	9 months ago
Andrew Dunham	c5abbcd4b4	wgengine/netstack: add a per-client limit for in-flight TCP forwards This is a fun one. Right now, when a client is connecting through a subnet router, here's roughly what happens: 1. The client initiates a connection to an IP address behind a subnet router, and sends a TCP SYN 2. The subnet router gets the SYN packet from netstack, and after running through acceptTCP, starts DialContext-ing the destination IP, without accepting the connection¹ 3. The client retransmits the SYN packet a few times while the dial is in progress, until either... 4. The subnet router successfully establishes a connection to the destination IP and sends the SYN-ACK back to the client, or... 5. The subnet router times out and sends a RST to the client. 6. If the connection was successful, the client ACKs the SYN-ACK it received, and traffic starts flowing As a result, the notification code in forwardTCP never notices when a new connection attempt is aborted, and it will wait until either the connection is established, or until the OS-level connection timeout is reached and it aborts. To mitigate this, add a per-client limit on how many in-flight TCP forwarding connections can be in-progress; after this, clients will see a similar behaviour to the global limit, where new connection attempts are aborted instead of waiting. This prevents a single misbehaving client from blocking all other clients of a subnet router by ensuring that it doesn't starve the global limiter. Also, bump the global limit again to a higher value. ¹ We can't accept the connection before establishing a connection to the remote server since otherwise we'd be opening the connection and then immediately closing it, which breaks a bunch of stuff; see #5503 for more details. Updates tailscale/corp#12184 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I76e7008ddd497303d75d473f534e32309c8a5144	9 months ago
Brad Fitzpatrick	1cf85822d0	ipn/ipnstate, wgengine/wgint: add handshake attempts accessors Not yet used. This is being made available so magicsock/wgengine can use it to ignore certain sends (UDP + DERP) later on at least mobile, letting wireguard-go think it's doing its full attempt schedule, but we can cut it short conditionally based on what we know from the control plane. Updates #7617 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com> Change-Id: Ia367cf6bd87b2aeedd3c6f4989528acdb6773ca7	9 months ago
Brad Fitzpatrick	eb28818403	wgengine: make pendOpen time later, after dup check Otherwise on OS retransmits, we'd make redundant timers in Go's timer heap that upon firing just do nothing (well, grab a mutex and check a map and see that there's nothing to do). Updates #cleanup Change-Id: Id30b8b2d629cf9c7f8133a3f7eca5dc79e81facb Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	9 months ago
Brad Fitzpatrick	219efebad4	wgengine: reduce critical section No need to hold wgLock while using the device to LookupPeer; that has its own mutex already. Updates #cleanup Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com> Change-Id: Ib56049fcc7163cf5a2c2e7e12916f07b4f9d67cb	9 months ago
Nick Khyl	7ef1fb113d	cmd/tailscaled, ipn/ipnlocal, wgengine: shutdown tailscaled if wgdevice is closed Tailscaled becomes inoperative if the Tailscale Tunnel wintun adapter is abruptly removed. wireguard-go closes the device in case of a read error, but tailscaled keeps running. This adds detection of a closed WireGuard device, triggering a graceful shutdown of tailscaled. It is then restarted by the tailscaled watchdog service process. Fixes #11222 Signed-off-by: Nick Khyl <nickk@tailscale.com>	9 months ago
Anton Tolchanov	cd9cf93de6	wgengine/netstack: expose TCP forwarder drops via clientmetrics - add a clientmetric with a counter of TCP forwarder drops due to the max attempts; - fix varz metric types, as they are all counters. Updates #8210 Signed-off-by: Anton Tolchanov <anton@tailscale.com>	9 months ago
Brad Fitzpatrick	e1bd7488d0	all: remove LenIter, use Go 1.22 range-over-int instead Updates #11058 Updates golang/go#65685 Change-Id: Ibb216b346e511d486271ab3d84e4546c521e4e22 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	9 months ago
Brad Fitzpatrick	6ad6d6b252	wgengine/wglog: add TS_DEBUG_RAW_WGLOG envknob for raw wg logs Updates #7617 (part of debugging it) Change-Id: I1bcbdcf0f929e3bcf83f244b1033fd438aa6dac1 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	9 months ago
Brad Fitzpatrick	8b9474b06a	wgengine/wgcfg: don't send UAPI to disable keep-alives on new peers That's already the default. Avoid the overhead of writing it on one side and reading it on the other to do nothing. Updates #cleanup (noticed while researching something else) Change-Id: I449c88a022271afb9be5da876bfaf438fe5d3f58 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	9 months ago
James Tucker	131f9094fd	wgengine/wglog: quieten WireGuard logs for allowedips An increasing number of users have very large subnet route configurations, which can produce very large amounts of log data when WireGuard is reconfigured. The logs don't contain the actual routes, so they're largely useless for diagnostics, so we'll just suppress them. Fixes tailscale/corp#17532 Signed-off-by: James Tucker <james@tailscale.com>	9 months ago
Jason Barnett	4d668416b8	wgengine/router: fix ip rule restoration Fixes #10857 Signed-off-by: Jason Barnett <J@sonBarnett.com>	9 months ago
Aaron Klotz	f7acbefbbb	wgengine/router: make the Windows ifconfig implementation reuse existing MibIPforwardRow2 when possible Looking at profiles, we spend a lot of time in winipcfg.LUID.DeleteRoute looking up the routing table entry for the provided RouteData. But we already have the row! We previously obtained that data via the full table dump we did in getInterfaceRoutes. We can make this a lot faster by hanging onto a reference to the wipipcfg.MibIPforwardRow2 and executing the delete operation directly on that. Fixes #11123 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	9 months ago
Percy Wegmann	c42a4e407a	tailfs: listen for local clients only on 100.100.100.100 FileSystemForLocal was listening on the node's Tailscale address, which potentially exposes the user's view of TailFS shares to other Tailnet users. Remote nodes should connect to exported shares via the peerapi. This removes that code so that FileSystemForLocal is only avaialable on 100.100.100.100:8080. Updates tailscale/corp#16827 Signed-off-by: Percy Wegmann <percy@tailscale.com>	9 months ago
Percy Wegmann	ddcffaef7a	tailfs: disable TailFSForLocal via policy Adds support for node attribute tailfs:access. If this attribute is not present, Tailscale will not accept connections to the local TailFS server at 100.100.100.100:8080. Updates tailscale/corp#16827 Signed-off-by: Percy Wegmann <percy@tailscale.com>	9 months ago
Percy Wegmann	abab0d4197	tailfs: clean up naming and package structure - Restyles tailfs -> tailFS - Defines interfaces for main TailFS types - Moves implemenatation of TailFS into tailfsimpl package Updates tailscale/corp#16827 Signed-off-by: Percy Wegmann <percy@tailscale.com>	9 months ago
Percy Wegmann	993acf4475	tailfs: initial implementation Add a WebDAV-based folder sharing mechanism that is exposed to local clients at 100.100.100.100:8080 and to remote peers via a new peerapi endpoint at /v0/tailfs. Add the ability to manage folder sharing via the new 'share' CLI sub-command. Updates tailscale/corp#16827 Signed-off-by: Percy Wegmann <percy@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
Jordan Whited	8b47322acc	wgengine/magicsock: implement probing of UDP path lifetime (#10844 ) This commit implements probing of UDP path lifetime on the tail end of an active direct connection. Probing configuration has two parts - Cliffs, which are various timeout cliffs of interest, and CycleCanStartEvery, which limits how often a probing cycle can start, per-endpoint. Initially a statically defined default configuration will be used. The default configuration has cliffs of 10s, 30s, and 60s, with a CycleCanStartEvery of 24h. Probing results are communicated via clientmetric counters. Probing is off by default, and can be enabled via control knob. Probing is purely informational and does not yet drive any magicsock behaviors. Updates #540 Signed-off-by: Jordan Whited <jordan@tailscale.com>	10 months ago
James Tucker	7e3bcd297e	go.mod,wgengine/netstack: bump gvisor Updates #8043 Signed-off-by: James Tucker <james@tailscale.com>	10 months ago
Claire Wang	213d696db0	magicsock: mute noisy expected peer mtu related error (#10870 )	10 months ago
Andrew Dunham	7a0392a8a3	wgengine/netstack: expose gVisor metrics through expvar When tailscaled is run with "-debug 127.0.0.1:12345", these metrics are available at: http://localhost:12345/debug/metrics Updates #8210 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I19db6c445ac1f8344df2bc1066a3d9c9030606f8	10 months ago
Andrew Dunham	6540d1f018	wgengine/router: look up absolute path to netsh.exe on Windows This is in response to logs from a customer that show that we're unable to run netsh due to the following error: router: firewall: adding Tailscale-Process rule to allow UDP for "C:\\Program Files\\Tailscale\\tailscaled.exe" ... router: firewall: error adding Tailscale-Process rule: exec: "netsh": cannot run executable found relative to current directory: There's approximately no reason to ever dynamically look up the path of a system utility like netsh.exe, so instead let's first look for it in the System32 directory and only if that fails fall back to the previous behaviour. Updates #10804 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I68cfeb4cab091c79ccff3187d35f50359a690573	10 months ago
Jordan Whited	b084888e4d	wgengine/magicsock: fix typos in docs (#10729 ) Updates #cleanup Signed-off-by: Jordan Whited <jordan@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
Jordan Whited	685b853763	wgengine/magicsock: fix handling of derp.PeerGoneMessage (#10589 ) The switch in Conn.runDerpReader() on the derp.ReceivedMessage type contained cases other than derp.ReceivedPacket that fell through to writing to c.derpRecvCh, which should only be reached for derp.ReceivedPacket. This can result in the last/previous derp.ReceivedPacket to be re-handled, effectively creating a duplicate packet. If the last derp.ReceivedPacket happens to be a disco.CallMeMaybe it may result in a disco ping scan towards the originating peer on the endpoints contained. The change in this commit moves the channel write on c.derpRecvCh and subsequent select awaiting the result into the derp.ReceivedMessage case, preventing it from being reached from any other case. Explicit continue statements are also added to non-derp.ReceivedPacket cases where they were missing, in order to signal intent to the reader. Fixes #10586 Signed-off-by: Jordan Whited <jordan@tailscale.com>	11 months ago
Andrew Dunham	727acf96a6	net/netcheck: use DERP frames as a signal for home region liveness This uses the fact that we've received a frame from a given DERP region within a certain time as a signal that the region is stil present (and thus can still be a node's PreferredDERP / home region) even if we don't get a STUN response from that region during a netcheck. This should help avoid DERP flaps that occur due to losing STUN probes while still having a valid and active TCP connection to the DERP server. RELNOTE=Reduce home DERP flapping when there's still an active connection Updates #8603 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: If7da6312581e1d434d5c0811697319c621e187a0	11 months ago
Naman Sood	97f84200ac	wgengine/router: implement UpdateMagicsockPort for CallbackRouter (#10494 ) Updates #9084. Signed-off-by: Naman Sood <mail@nsood.in>	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
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
James Tucker	215f657a5e	wgengine/router: create netfilter runner in setNetfilterMode This will enable the runner to be replaced as a configuration side effect in a later change. Updates tailscale/corp#14029 Signed-off-by: James Tucker <james@tailscale.com>	12 months ago
Andrew Lytvynov	263e01c47b	wgengine/filter: add protocol-agnostic packet checker (#10446 ) For use in ACL tests, we need a way to check whether a packet is allowed not just with TCP, but any protocol. Updates #3561 Signed-off-by: Andrew Lytvynov <awly@tailscale.com>	12 months ago
Jordan Whited	5e861c3871	wgengine/netstack: disable RACK on Windows (#10402 ) Updates #9707 Signed-off-by: Jordan Whited <jordan@tailscale.com>	12 months ago
Jordan Whited	1af7f5b549	wgengine/magicsock: fix typo in Conn.handlePingLocked() (#10365 ) Updates #cleanup Signed-off-by: Jordan Whited <jordan@tailscale.com>	1 year ago
Brad Fitzpatrick	4d196c12d9	health: don't report a warning in DERP homeless mode Updates #3363 Updates tailscale/corp#396 Change-Id: Ibfb0496821cb58a78399feb88d4206d81e95ca0f Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Brad Fitzpatrick	3bd382f369	wgengine/magicsock: add DERP homeless debug mode for testing In DERP homeless mode, a DERP home connection is not sought or maintained and the local node is not reachable. Updates #3363 Updates tailscale/corp#396 Change-Id: Ibc30488ac2e3cfe4810733b96c2c9f10a51b8331 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Jordan Whited	2ff54f9d12	wgengine/magicsock: move trustBestAddrUntil forward on non-disco rx (#10274 ) This is gated behind the silent disco control knob, which is still in its infancy. Prior to this change disco pong reception was the only event that could move trustBestAddrUntil forward, so even though we weren't heartbeating, we would kick off discovery pings every trustUDPAddrDuration and mirror to DERP. Updates #540 Signed-off-by: Jordan Whited <jordan@tailscale.com>	1 year ago
Jordan Whited	c99488ea19	wgengine/magicsock: fix typo in endpoint.sendDiscoPing() docs (#10232 ) Updates #cleanup Signed-off-by: Jordan Whited <jordan@tailscale.com>	1 year ago

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1472 Commits (f5d79963ea81721daa207c9f52e8eca4230f5f58)