tailscale

Commit Graph

Author	SHA1	Message	Date
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>	1 year 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>	1 year 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>	1 year 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>	1 year 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>	1 year 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>	1 year 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>	1 year 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>	1 year 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>	1 year 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>	1 year 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>	1 year 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>	1 year 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>	1 year 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>	1 year 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>	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
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
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>	1 year 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>	1 year 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>	1 year 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>	1 year ago
Brad Fitzpatrick	58a4fd43d8	types/netmap, all: use read-only tailcfg.NodeView in NetworkMap Updates #8948 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Brad Fitzpatrick	af2e4909b6	all: remove some Debug fields, NetworkMap.Debug, Reconfig Debug arg Updates #8923 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year 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>	1 year 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>	1 year 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	1 year 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>	1 year 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>	1 year 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>	1 year 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>	1 year ago
David Anderson	9d89e85db7	wgengine/magicsock: document mysterious-looking assignment Updates #cleanup Signed-off-by: David Anderson <danderson@tailscale.com>	1 year ago
David Anderson	84777354a0	wgengine/magicsock: factor out more separable parts Updates #8720 Signed-off-by: David Anderson <danderson@tailscale.com>	1 year ago
David Anderson	9a76deb4b0	disco: move disco pcap helper to disco package Updates tailscale/corp#13464 Signed-off-by: David Anderson <danderson@tailscale.com>	1 year ago
David Anderson	cde37f5307	wgengine/magicsock: factor out peerMap into separate file Updates tailscale/corp#13464 Signed-off-by: David Anderson <danderson@tailscale.com>	1 year 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>	1 year ago
David Anderson	c2831f6614	wgengine/magicsock: delete unused stuff Updates tailscale/corp#13464 Signed-off-by: David Anderson <danderson@tailscale.com>	1 year ago
Charlotte Brandhorst-Satzkorn	339397ab74	wgengine/magicsock: remove noV4/noV6 check in addrForSendWireGuardLocked This change removes the noV4/noV6 check from addrForSendWireGuardLocked. On Android, the client panics when reaching `rand.Intn()`, likely due to the candidates list being containing no candidates. The suspicion is that the `noV4` and the `noV6` are both being triggered causing the loop to continue. Updates tailscale/corp#12938 Updates #7826 Signed-off-by: Charlotte Brandhorst-Satzkorn <charlotte@tailscale.com>	1 year ago
Andrew Dunham	2a9d46c38f	wgengine/magicsock: prefer private endpoints to public ones Switch our best address selection to use a scoring-based approach, where we boost each address based on whether it's a private IP or IPv6. For users in cloud environments, this biases endpoint selection towards using an endpoint that is less likely to cost the user money, and should be less surprising to users. This also involves updating the tests to not use private IPv4 addresses; other than that change, the behaviour should be identical for existing endpoints. Updates #8097 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I069e3b399daea28be66b81f7e44fc27b2943d8af	1 year ago
Charlotte Brandhorst-Satzkorn	ddb4040aa0	wgengine/magicsock: add address selection for wireguard only endpoints (#7979 ) This change introduces address selection for wireguard only endpoints. If a endpoint has not been used before, an address is randomly selected to be used based on information we know about, such as if they are able to use IPv4 or IPv6. When an address is initially selected, we also initiate a new ICMP ping to the endpoints addresses to determine which endpoint offers the best latency. This information is then used to update which endpoint we should be using based on the best possible route. If the latency is the same for a IPv4 and an IPv6 address, IPv6 will be used. Updates #7826 Signed-off-by: Charlotte Brandhorst-Satzkorn <charlotte@tailscale.com>	2 years ago
Andrew Dunham	bcf7b63d7e	wgengine/magicsock: add hysteresis to endpoint selection Avoid selecting an endpoint as "better" than the current endpoint if the total latency improvement is less than 1%. This adds some hysteresis to avoid flapping between endpoints for a minimal improvement in latency. Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: If8312e1768ea65c4b4d4e13d8de284b3825d7a73	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
Mihai Parparita	4722f7e322	all: move network monitoring from wgengine/monitor to net/netmon We're using it in more and more places, and it's not really specific to our use of Wireguard (and does more just link/interface monitoring). Also removes the separate interface we had for it in sockstats -- it's a small enough package (we already pull in all of its dependencies via other paths) that it's not worth the extra complexity. Updates #7621 Updates #7850 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Andrew Dunham	f85dc6f97c	ci: add more lints (#7909 ) This is a follow-up to #7905 that adds two more linters and fixes the corresponding findings. As per the previous PR, this only flags things that are "obviously" wrong, and fixes the issues found. Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I8739bdb7bc4f75666a7385a7a26d56ec13741b7c	2 years ago
Andrew Dunham	80b138f0df	wgengine/magicsock: keep advertising endpoints after we stop discovering them Previously, when updating endpoints we would immediately stop advertising any endpoint that wasn't discovered during determineEndpoints. This could result in, for example, a case where we performed an incremental netcheck, didn't get any of our three STUN packets back, and then dropped our STUN endpoint from the set of advertised endpoints... which would result in clients falling back to a DERP connection until the next call to determineEndpoints. Instead, let's cache endpoints that we've discovered and continue reporting them to clients until a timeout expires. In the above case where we temporarily don't have a discovered STUN endpoint, we would continue reporting the old value, then re-discover the STUN endpoint again and continue reporting it as normal, so clients never see a withdrawal. Updates tailscale/coral#108 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I42de72e7418ab328a6c732bdefc74549708cf8b9	2 years ago
Brad Fitzpatrick	4b49ca4a12	wgengine/magicsock: update comments on what implements conn.Bind The comment still said *magicsock.Conn implemented wireguard-go conn.Bind. That wasn't accurate anymore. A doc #cleanup. Change-Id: I7fd003b939497889cc81147bfb937b93e4f6865c Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	10f1c90f4d	wgengine/magicsock, types/nettype, etc: finish ReadFromUDPAddrPort netip migration So we're staying within the netip.Addr/AddrPort consistently and avoiding allocs/conversions to the legacy net addr types. Updates #5162 Change-Id: I59feba60d3de39f773e68292d759766bac98c917 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	29f7df9d8f	wgengine/magicsock, etc: remove mostly unused WriteTo methods Updates #2331 Updates #5162 Change-Id: I8291884425481eeaedde38a54adfd8ed7292a497 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	6866aaeab3	wgengine/magicsock: factor out receiveIPv4 & receiveIPv6 common code Updates #2331 Change-Id: I801df38b217f5d17203e8dc3b8654f44747e0f4b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Andrew Dunham	228d0c6aea	net/netcheck: use dnscache.Resolver when resolving DERP IPs This also adds a bunch of tests for this function to ensure that we're returning the proper IP(s) in all cases. Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I0d9d57170dbab5f2bf07abdf78ecd17e0e635399	2 years ago
Mihai Parparita	edb02b63f8	net/sockstats: pass in logger to sockstats.WithSockStats Using log.Printf may end up being printed out to the console, which is not desirable. I noticed this when I was investigating some client logs with `sockstats: trace "NetcheckClient" was overwritten by another`. That turns to be harmless/expected (the netcheck client will fall back to the DERP client in some cases, which does its own sockstats trace). However, the log output could be visible to users if running the `tailscale netcheck` CLI command, which would be needlessly confusing. Updates tailscale/corp#9230 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago

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510 Commits (6f69fe8ad7c0a7dcc6493b292b4deff514962f9b)