525 Commits (449f46c2070f49f58e52d34a01db35926050bb80)

Author	SHA1	Message	Date
Charlotte Brandhorst-Satzkorn	449f46c207	wgengine/magicsock: rebind/restun if a syscall.EPERM error is returned (#11711) ... We have seen in macOS client logs that the "operation not permitted", a syscall.EPERM error, is being returned when traffic is attempted to be sent. This may be caused by security software on the client. This change will perform a rebind and restun if we receive a syscall.EPERM error on clients running darwin. Rebinds will only be called if we haven't performed one specifically for an EPERM error in the past 5 seconds. Updates #11710 Signed-off-by: Charlotte Brandhorst-Satzkorn <charlotte@tailscale.com>	2 months ago
James Tucker	a2eb1c22b0	wgengine/magicsock: allow disco communication without known endpoints ... Just because we don't have known endpoints for a peer does not mean that the peer should become unreachable. If we know the peers key, it should be able to call us, then we can talk back via whatever path it called us on. First step - don't drop the packet in this context. Updates tailscale/corp#19106 Signed-off-by: James Tucker <james@tailscale.com>	2 months ago
Brad Fitzpatrick	a36cfb4d3d	tailcfg, ipn/ipnlocal, wgengine/magicsock: add only-tcp-443 node attr ... Updates tailscale/corp#17879 Change-Id: I0dc305d147b76c409cf729b599a94fa723aef0e0 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 months ago
Brad Fitzpatrick	5d1c72f76b	wgengine/magicsock: don't use endpoint debug ringbuffer on mobile. ... Save some memory. Updates tailscale/corp#18514 Change-Id: Ibcaf3c6d8e5cc275c81f04141d0f176e2249509b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 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	3 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>	3 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>	3 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>	4 months ago
Claire Wang	213d696db0	magicsock: mute noisy expected peer mtu related error (#10870)	4 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>	5 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	6 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>	6 months ago
Jordan Whited	1af7f5b549	wgengine/magicsock: fix typo in Conn.handlePingLocked() (#10365) ... Updates #cleanup Signed-off-by: Jordan Whited <jordan@tailscale.com>	6 months 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>	7 months ago
Jordan Whited	e848736927	control/controlknobs,wgengine/magicsock: implement SilentDisco toggle (#10195) ... This change exposes SilentDisco as a control knob, and plumbs it down to magicsock.endpoint. No changes are being made to magicsock.endpoint disco behavior, yet. Updates #540 Signed-off-by: Jordan Whited <jordan@tailscale.com> Co-authored-by: Brad Fitzpatrick <bradfitz@tailscale.com>	7 months ago
Brad Fitzpatrick	514539b611	wgengine/magicsock: close disco listeners on Conn.Close, fix Linux root TestNewConn ... TestNewConn now passes as root on Linux. It wasn't closing the BPF listeners and their goroutines. The code is still a mess of two Close overlapping code paths, but that can be refactored later. For now, make the two close paths more similar. Updates #9945 Change-Id: I8a3cf5fb04d22ba29094243b8e645de293d9ed85 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	7 months ago
Brad Fitzpatrick	a6270826a3	wgengine/magicsock: fix data race regression in disco ping callbacks ... Regression from c15997511d. The callback could be run multiple times from different endpoints. Fixes #9801 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	8 months ago
Val	249edaa349	wgengine/magicsock: add probed MTU metrics ... Record the number of MTU probes sent, the total bytes sent, the number of times we got a successful return from an MTU probe of a particular size, and the max MTU recorded. Updates #311 Signed-off-by: Val <valerie@tailscale.com>	8 months ago
Val	893bdd729c	disco,net/tstun,wgengine/magicsock: probe peer MTU ... Automatically probe the path MTU to a peer when peer MTU is enabled, but do not use the MTU information for anything yet. Updates #311 Signed-off-by: Val <valerie@tailscale.com>	8 months ago
Brad Fitzpatrick	6f36f8842c	cmd/tailscale, magicsock: add debug command to flip DERP homes ... For testing netmap patchification server-side. Updates #1909 Change-Id: Ib1d784bd97b8d4a31e48374b4567404aae5280cc Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	8 months ago
James Tucker	80206b5323	wgengine/magicsock: add nodeid to panic condition on public key reuse ... If the condition arises, it should be easy to track down. Updates #9547 Signed-off-by: James Tucker <james@tailscale.com>	8 months ago
Val	95635857dc	wgengine/magicsock: replace CanPMTUD() with ShouldPMTUD() ... Replace CanPMTUD() with ShouldPMTUD() to check if peer path MTU discovery should be enabled, in preparation for adding support for enabling/disabling peer MTU dynamically. Updated #311 Signed-off-by: Val <valerie@tailscale.com>	8 months ago
Val	a5ae21a832	wgengine/magicsock: improve don't fragment bit set/get support ... Add an enable/disable argument to setDontFragment() in preparation for dynamic enable/disable of peer path MTU discovery. Add getDontFragment() to get the status of the don't fragment bit from a socket. Updates #311 Co-authored-by: James Tucker <james@tailscale.com> Signed-off-by: Val <valerie@tailscale.com>	8 months ago
Brad Fitzpatrick	926c990a09	types/netmap: start phasing out Addresses, add GetAddresses method ... NetworkMap.Addresses is redundant with the SelfNode.Addresses. This works towards a TODO to delete NetworkMap.Addresses and replace it with a method. This is similar to #9389. Updates #cleanup Change-Id: Id000509ca5d16bb636401763d41bdb5f38513ba0 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	9 months ago
Brad Fitzpatrick	727b1432a8	wgengine: remove SetNetInfoCallback method from Engine ... LocalBackend can talk to magicsock on its own to do this without the "Engine" being involved. (Continuing a little side quest of cleaning up the Engine interface...) Updates #cleanup Change-Id: I8654acdca2b883b1bd557fdc0cfb90cd3a418a62 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	9 months ago
Brad Fitzpatrick	3af051ea27	control/controlclient, types/netmap: start plumbing delta netmap updates ... Currently only the top four most popular changes: endpoints, DERP home, online, and LastSeen. Updates #1909 Change-Id: I03152da176b2b95232b56acabfb55dcdfaa16b79 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	9 months ago
Brad Fitzpatrick	ff6fadddb6	wgengine/magicsock: stop retaining *netmap.NetworkMap ... We're trying to start using that monster type less and eventually get rid of it. Updates #1909 Change-Id: I8e1e725bce5324fb820a9be6c7952767863e6542 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	9 months ago
Brad Fitzpatrick	42072683d6	control/controlknobs: move ForceBackgroundSTUN to controlknobs.Knobs ... This is both more efficient (because the knobs' bool is only updated whenever Node is changed, rarely) and also gets us one step closer to removing a case of storing a netmap.NetworkMap in magicsock. (eventually we want to phase out much of the use of that type internally) Updates #1909 Change-Id: I37e81789f94133175064fdc09984e4f3a431f1a1 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	9 months ago
Brad Fitzpatrick	4e91cf20a8	control/controlknobs, all: add plumbed Knobs type, not global variables ... Previously two tsnet nodes in the same process couldn't have disjoint sets of controlknob settings from control as both would overwrite each other's global variables. This plumbs a new controlknobs.Knobs type around everywhere and hangs the knobs sent by control on that instead. Updates #9351 Change-Id: I75338646d36813ed971b4ffad6f9a8b41ec91560 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	9 months ago
Brad Fitzpatrick	d050700a3b	wgengine/magicsock: make peerMap also keyed by NodeID ... In prep for incremental netmap update plumbing (#1909), make peerMap also keyed by NodeID, as all the netmap node mutations passed around later will be keyed by NodeID. In the process, also: * add envknob.InDevMode, as a signal that we can panic more aggressively in unexpected cases. * pull two moderately large blocks of code in Conn.SetNetworkMap out into their own methods * convert a few more sets from maps to set.Set Updates #1909 Change-Id: I7acdd64452ba58e9d554140ee7a8760f9043f961 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	9 months 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>	9 months 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>	9 months ago
Brad Fitzpatrick	ea4425d8a9	ipn/ipnlocal, wgengine/magicsock: move UpdateStatus stuff around ... Upcoming work on incremental netmap change handling will require some replumbing of which subsystems get notified about what. Done naively, it could break "tailscale status --json" visibility later. To make sure I understood the flow of all the updates I was rereading the status code and realized parts of ipnstate.Status were being populated by the wrong subsystems. The engine (wireguard) and magicsock (data plane, NAT traveral) should only populate the stuff that they uniquely know. The WireGuard bits were fine but magicsock was populating stuff stuff that LocalBackend could've better handled, so move it there. Updates #1909 Change-Id: I6d1b95d19a2d1b70fbb3c875fac8ea1e169e8cb0 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	9 months ago
James Tucker	e1c7e9b736	wgengine/magicsock: improve endpoint selection for WireGuard peers with rx time ... If we don't have the ICMP hint available, such as on Android, we can use the signal of rx traffic to bias toward a particular endpoint. We don't want to stick to a particular endpoint for a very long time without any signals, so the sticky time is reduced to 1 second, which is large enough to avoid excessive packet reordering in the common case, but should be small enough that either rx provides a strong signal, or we rotate in a user-interactive schedule to another endpoint, improving the feel of failover to other endpoints. Updates #8999 Co-authored-by: Charlotte Brandhorst-Satzkorn <charlotte@tailscale.com> Signed-off-by: James Tucker <james@tailscale.com> Signed-off-by: Charlotte Brandhorst-Satzkorn <charlotte@tailscale.com>	9 months ago
Brad Fitzpatrick	84b94b3146	types/netmap, all: make NetworkMap.SelfNode a tailcfg.NodeView ... Updates #1909 Change-Id: I8c470cbc147129a652c1d58eac9b790691b87606 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	9 months ago
Val	c15997511d	wgengine/magicsock: only accept pong sent by CLI ping ... When sending a ping from the CLI, only accept a pong that is in reply to the specific CLI ping we sent. Updates #311 Signed-off-by: Val <valerie@tailscale.com>	9 months ago
Brad Fitzpatrick	58a4fd43d8	types/netmap, all: use read-only tailcfg.NodeView in NetworkMap ... Updates #8948 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	10 months ago
Brad Fitzpatrick	af2e4909b6	all: remove some Debug fields, NetworkMap.Debug, Reconfig Debug arg ... Updates #8923 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	10 months ago
Brad Fitzpatrick	25663b1307	tailcfg: remove most Debug fields, move bulk to nodeAttrs [capver 70] ... Now a nodeAttr: ForceBackgroundSTUN, DERPRoute, TrimWGConfig, DisableSubnetsIfPAC, DisableUPnP. Kept support for, but also now a NodeAttr: RandomizeClientPort. Removed: SetForceBackgroundSTUN, SetRandomizeClientPort (both never used, sadly... never got around to them. But nodeAttrs are better anyway), EnableSilentDisco (will be a nodeAttr later when that effort resumes). Updates #8923 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	10 months ago
KevinLiang10	7ed3681cbe	tailcfg: Add FirewallMode to NetInfo to record wether host using iptables or nftables ... To record wether user is using iptables or nftables after we add support to nftables on linux, we are adding a field FirewallMode to NetInfo in HostInfo to reflect what firewall mode the host is running, and form metrics. The information is gained from a global constant in hostinfo.go. We set it when selection heuristic made the decision, and magicsock reports this to control. Updates: tailscale/corp#13943 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>	10 months ago
Andrew Dunham	95d776bd8c	wgengine/magicsock: only cache N most recent endpoints per-Addr ... If a node is flapping or otherwise generating lots of STUN endpoints, we can end up caching a ton of useless values and sending them to peers. Instead, let's apply a fixed per-Addr limit of endpoints that we cache, so that we're only sending peers up to the N most recent. Updates tailscale/corp#13890 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I8079a05b44220c46da55016c0e5fc96dd2135ef8	10 months ago
James Tucker	de8e55fda6	net/netcheck,wgengine/magicsock: reduce coupling between netcheck and magicsock ... Netcheck no longer performs I/O itself, instead it makes requests via SendPacket and expects users to route reply traffic to ReceiveSTUNPacket. Netcheck gains a Standalone function that stands up sockets and goroutines to implement I/O when used in a standalone fashion. Magicsock now unconditionally routes STUN traffic to the netcheck.Client that it hosts, and plumbs the send packet sink. The CLI is updated to make use of the Standalone mode. Fixes #8723 Signed-off-by: James Tucker <james@tailscale.com>	10 months ago
salman aljammaz	99e06d3544	magicsock: set the don't fragment sockopt (#8715) ... This sets the Don't Fragment flag, for now behind the TS_DEBUG_ENABLE_PMTUD envknob. Updates #311. Signed-off-by: Val <valerie@tailscale.com> Signed-off-by: salman <salman@tailscale.com>	10 months ago
salman aljammaz	25a7204bb4	wgengine,ipn,cmd/tailscale: add size option to ping (#8739) ... This adds the capability to pad disco ping message payloads to reach a specified size. It also plumbs it through to the tailscale ping -size flag. Disco pings used for actual endpoint discovery do not use this yet. Updates #311. Signed-off-by: salman <salman@tailscale.com> Co-authored-by: Val <valerie@tailscale.com>	10 months ago
salman aljammaz	68f8e5678e	wgengine/magicsock: remove dead code (#8745) ... The nonce value is not read by anything, and di.sharedKey.Seal() a few lines below generates its own. #cleanup Signed-off-by: salman <salman@tailscale.com>	10 months ago
David Anderson	9d89e85db7	wgengine/magicsock: document mysterious-looking assignment ... Updates #cleanup Signed-off-by: David Anderson <danderson@tailscale.com>	10 months ago
David Anderson	84777354a0	wgengine/magicsock: factor out more separable parts ... Updates #8720 Signed-off-by: David Anderson <danderson@tailscale.com>	10 months ago
David Anderson	9a76deb4b0	disco: move disco pcap helper to disco package ... Updates tailscale/corp#13464 Signed-off-by: David Anderson <danderson@tailscale.com>	10 months ago
David Anderson	cde37f5307	wgengine/magicsock: factor out peerMap into separate file ... Updates tailscale/corp#13464 Signed-off-by: David Anderson <danderson@tailscale.com>	10 months ago
David Anderson	f7016d8c00	wgengine/magicsock: factor out endpoint into its own file ... Updates tailscale/corp#13464 Signed-off-by: David Anderson <danderson@tailscale.com>	10 months ago