tailscale

Commit Graph

Author	SHA1	Message	Date
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	f06e64c562	wgengine: use set.HandleSet in another place I guess we missed this one earlier when we unified the various copies into set.HandleSet. Updates #cleanup Change-Id: I7e6de9ce16e8fc4846abf384dfcc8eaec4d99e60 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	98a5116434	all: adjust some build tags for plan9 I'm not saying it works, but it compiles. Updates #5794 Change-Id: I2f3c99732e67fe57a05edb25b758d083417f083e Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	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
Brad Fitzpatrick	9089efea06	net/netmon: make ChangeFunc's signature take new ChangeDelta, not bool Updates #9040 Change-Id: Ia43752064a1a6ecefc8802b58d6eaa0b71cf1f84 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
James Tucker	5edb39d032	wgengine/magicsock: clear out endpoint statistics when it becomes bad There are cases where we do not detect the non-viability of a route, but we will instead observe a failure to send. In a Disco path this would normally be handled as a side effect of Disco, which is not available to non-Disco WireGuard nodes. In both cases, recognizing the failure as such will result in faster convergence. Updates #8999 Signed-off-by: James Tucker <james@tailscale.com>	1 year ago
Charlotte Brandhorst-Satzkorn	7c9c68feed	wgengine/magicsock: update lastfullping comment to include wg only LastFullPing is now used for disco or wireguard only endpoints. This change updates the comment to make that clear. Updates #7826 Signed-off-by: Charlotte Brandhorst-Satzkorn <charlotte@tailscale.com>	1 year ago
James Tucker	3a652d7761	wgengine/magicsock: clear endpoint state in noteConnectivityChange There are latency values stored in bestAddr and endpointState that are no longer applicable after a connectivity change and should be cleared out, following the documented behavior of the function. Updates #8999 Signed-off-by: James Tucker <james@tailscale.com>	1 year ago
Brad Fitzpatrick	947def7688	types/netmap: remove redundant Netmap.Hostinfo It was in SelfNode.Hostinfo anyway. The redundant copy was just costing us an allocation per netmap (a Hostinfo.Clone). Updates #1909 Change-Id: Ifac568aa5f8054d9419828489442a0f4559bc099 Signed-off-by: Brad Fitzpatrick <bradfitz@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
Maisem Ali	8a5ec72c85	cmd/cloner: use maps.Clone and ptr.To Updates #cleanup Signed-off-by: Maisem Ali <maisem@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
KevinLiang10	93cab56277	wgengine/router: fall back and set iptables as default again Due to the conflict between our nftables implementation and ufw, which is a common utility used on linux. We now want to take a step back to prevent regression. This will give us more chance to let users to test our nftables support and heuristic. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@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
Brad Fitzpatrick	bc0eb6b914	all: import x/exp/maps as xmaps to distinguish from Go 1.21 "maps" Updates #8419 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Brad Fitzpatrick	e8551d6b40	all: use Go 1.21 slices, maps instead of x/exp/{slices,maps} Updates #8419 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
Brad Fitzpatrick	25a8daf405	wgengine/router: always use nftables mode on gokrazy Updates gokrazy/gokrazy#209 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Brad Fitzpatrick	17ce75347c	wgengine: adjust debug logging for WireGuard-only peers Updates #cleanup Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
KevinLiang10	411e3364a9	wgengine/router: use iptablesRunner when no firewall tool is available: The current router errors out when neither iptables nor nftables support is present. We should fall back to the previous behaviour which we creates a dummy iptablesRunner. Fixes: #8878 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>	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
Brad Fitzpatrick	92fc9a01fa	cmd/tailscale: add debug commands to break connections For testing reconnects. Updates tailscale/corp#5761 Signed-off-by: Brad Fitzpatrick <bradfitz@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
KevinLiang10	ae63c51ff1	wgengine/router: add auto selection heuristic for iptables/nftables This commit replaces the TS_DEBUG_USE_NETLINK_NFTABLES envknob with a TS_DEBUG_FIREWALL_MODE that should be set to either 'iptables' or 'nftables' to select firewall mode manually, other wise tailscaled will automatically choose between iptables and nftables depending on environment and system availability. updates: #319 Signed-off-by: KevinLiang10 <kevinliang@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	52212f4323	all: update exp/slices and fix call sites slices.SortFunc suffered a late-in-cycle API breakage. Updates #cleanup Signed-off-by: David Anderson <danderson@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
Maisem Ali	1ecc16da5f	tailcfg,ipn/ipnlocal,wgengine: add values to PeerCapabilities Define PeerCapabilty and PeerCapMap as the new way of sending down inter-peer capability information. Previously, this was unstructured and you could only send down strings which got too limiting for certain usecases. Instead add the ability to send down raw JSON messages that are opaque to Tailscale but provide the applications to define them however they wish. Also update accessors to use the new values. Updates #4217 Signed-off-by: Maisem Ali <maisem@tailscale.com>	1 year ago
KevinLiang10	a3c7b21cd1	util/linuxfw: add nftables support This commit adds nftable rule injection for tailscaled. If tailscaled is started with envknob TS_DEBUG_USE_NETLINK_NFTABLES = true, the router will use nftables to manage firewall rules. Updates: #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>	1 year ago
Val	1138f4eb5f	wgengine/router,ipn/ipnlocal: add MTU field to router config The MacOS client can't set the MTU when creating the tun due to lack of permissions, so add it to the router config and have MacOS set it in the callback using a method that it does have permissions for. Updates #8219 Signed-off-by: Val <valerie@tailscale.com>	1 year ago
Andrew Lytvynov	354885a08d	wgengine/netlog: fix nil pointer dereference in logtail (#8598 )	1 year ago
Andrew Dunham	60ab8089ff	logpolicy, various: allow overriding log function This allows sending logs from the "logpolicy" package (and associated callees) to something other than the log package. The behaviour for tailscaled remains the same, passing in log.Printf Updates #8249 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ie1d43b75fa7281933d9225bffd388462c08a5f31	1 year ago
Brad Fitzpatrick	7b1c3dfd28	tailcfg,etc: remove unused tailcfg.Node.KeepAlive field The server hasn't sent it in ages. Updates #cleanup Change-Id: I9695ab0f074ec6fb006e11faf3cdfc5ca049fbf8 Signed-off-by: Brad Fitzpatrick <bradfitz@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
KevinLiang10	243ce6ccc1	util/linuxfw: decoupling IPTables logic from linux router This change is introducing new netfilterRunner interface and moving iptables manipulation to a lower leveled iptables runner. For #391 Signed-off-by: KevinLiang10 <kevinliang@tailscale.com>	1 year ago
Brad Fitzpatrick	a874f1afd8	all: adjust case of "IPv4" and "IPv6" Updates #docs Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Brad Fitzpatrick	8b80d63b42	wgengine/magicsock: clarify a log message is a warning, not an error Updates #cleanup Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Maisem Ali	fe95d81b43	ipn/ipnlocal,wgengine/netstack: move LocalBackend specifc serving logic to LocalBackend The netstack code had a bunch of logic to figure out if the LocalBackend should handle an incoming connection and then would call the function directly on LocalBackend. Move that logic to LocalBackend and refactor the methods to return conn handlers. Updates #cleanup Signed-off-by: Maisem Ali <maisem@tailscale.com>	1 year ago
Denton Gentry	5b110685fb	wgengine/netstack: increase maxInFlightConnectionAttempts Address reports of subnet router instability when running in `--tun=userspace-networking` mode. Fixes https://github.com/tailscale/corp/issues/12184 Signed-off-by: Denton Gentry <dgentry@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
Denton Gentry	399a80785e	wgengine/netstack: use ping6 on BSD platforms Various BSD-derived operating systems including macOS and FreeBSD require that ping6 be used for IPv6 destinations. The "ping" command does not understand an IPv6 destination. FreeBSD 13.x and later do handle IPv6 in the regular ping command, but also retain a ping6 command. We use ping6 on all versions of FreeBSD. Fixes https://github.com/tailscale/tailscale/issues/8225 Signed-off-by: Denton Gentry <dgentry@tailscale.com>	2 years 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
Brad Fitzpatrick	4d7927047c	wgengine/magicsock: annotate, skip flaky TestIsWireGuardOnlyPickEndpointByPing Updates #8037 Updates #7826 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years 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	280255acae	various: add golangci-lint, fix issues (#7905 ) This adds an initial and intentionally minimal configuration for golang-ci, fixes the issues reported, and adds a GitHub Action to check new pull requests against this linter configuration. Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I8f38fbc315836a19a094d0d3e986758b9313f163	2 years ago
Brad Fitzpatrick	d5a870b4dc	wgengine/monitor: add --monitor-duration flag to opt-in TestMonitorMode TestMonitorMode skips by default, without the --monitor flag, and then it previously ran forever. This adds an option --monitor-duration flag that defaults to zero (run forever) but if non-zero bounds how long the tests runs. This means you can then also use e.g. `go test --cpuprofile` and capture a CPU/mem profile for a minute or two. Updates #7621 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	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
James Tucker	20f17d6e7b	wgengine/magicsock: reenable magicsock tests on Windows These tests are passing locally and on CI. They had failed earlier in the day when first fixing up CI, and it is not immediately clear why. I have cycled IPv6 support locally, but this should not have a substantial effect. Updates #7876 Signed-off-by: James Tucker <jftucker@gmail.com>	2 years ago
James Tucker	8dec1a8724	.github/workflows: reenable Windows CI, disable broken tests We accidentally switched to ./tool/go in `4022796484` which resulted in no longer running Windows builds, as this is attempting to run a bash script. I was unable to quickly fix the various tests that have regressed, so instead I've added skips referencing #7876, which we need to back and fix. Updates #7262 Updates #7876 Signed-off-by: James Tucker <james@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
Maisem Ali	64bbf1738e	tailcfg: make SelfNodeV4MasqAddrForThisPeer a pointer This makes `omitempty` actually work, and saves bytes in each map response. Updates tailscale/corp#8020 Signed-off-by: Maisem Ali <maisem@tailscale.com>	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
James Tucker	e09c434e5d	wgengine/magicsock: remove locking sync requirements on conn disco keys The lazy initialization of the disco key is not necessary, and contributes to unnecessary locking and state checking. Updates #cleanup Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
James Tucker	e1b71c83ac	wgengine/magicsock: remove unused fields on discoInfo Updates #cleanup Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
James Tucker	a257b2f88b	wgengine/magicsock: add immutability documentation to endpointDisco Updates #7825 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
James Tucker	fb18af5564	wgengine/netstack: fix data-race on startup Running tailscaled with the race detector enabled immediately fires on this field, as it is updated after first read. Updates #cleanup Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Charlotte Brandhorst-Satzkorn	c573bef0aa	tailcfg,wgengine: add initial support for WireGuard only peers A peer can have IsWireGuardOnly, which means it will not support DERP or Disco, and it must have Endpoints filled in order to be usable. In the present implementation only the first Endpoint will be used as the bestAddr. Updates tailscale/corp#10351 Co-authored-by: Charlotte Brandhorst-Satzkorn <charlotte@tailscale.com> Co-authored-by: James Tucker <james@tailscale.com> Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
James Tucker	6cfcb3cae4	wgengine/magicsock: fix synchronization of endpoint disco fields Identified in review in #7821 endpoint.discoKey and endpoint.discoShort are often accessed without first taking endpoint.mu. The arrangement with endpoint.mu is inconvenient for a good number of those call-sites, so it is instead replaced with an atomic pointer to carry both pieces of disco info. This will also help with #7821 that wants to add explicit checks/guards to disable disco behaviors when disco keys are missing which is necessarily implicitly mostly covered by this change. Updates #7821 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Tom DNetto	6a627e5a33	net, wgengine/capture: encode NAT addresses in pcap stream Signed-off-by: Tom DNetto <tom@tailscale.com>	2 years ago
valscale	7bfb7744b7	derp,magicsock: add debug envknobs for HTTP and derp server name (#7744 ) Make developing derp easier by: 1. Creating an envknob telling clients to use HTTP to connect to derp servers, so devs don't have to acquire a valid TLS cert. 2. Creating an envknob telling clients which derp server to connect to, so devs don't have to edit the ACLs in the admin console to add a custom DERP map. 3. Explaining how the -dev and -a command lines args to derper interact. To use this: 1. Run derper with -dev. 2. Run tailscaled with TS_DEBUG_USE_DERP_HTTP=1 and TS_DEBUG_USE_DERP_ADDR=localhost This will result in the client connecting to derp via HTTP on port 3340. Fixes #7700 Signed-off-by: Val <valerie@tailscale.com>	2 years ago
Jordan Whited	f475e5550c	net/neterror, wgengine/magicsock: use UDP GSO and GRO on Linux (#7791 ) This commit implements UDP offloading for Linux. GSO size is passed to and from the kernel via socket control messages. Support is probed at runtime. UDP GSO is dependent on checksum offload support on the egress netdev. UDP GSO will be disabled in the event sendmmsg() returns EIO, which is a strong signal that the egress netdev does not support checksum offload. Updates tailscale/corp#8734 Signed-off-by: Jordan Whited <jordan@tailscale.com>	2 years ago
Andrew Dunham	8d3acc9235	util/sysresources, magicsock: scale DERP buffer based on system memory This adds the util/sysresources package, which currently only contains a function to return the total memory size of the current system. Then, we modify magicsock to scale the number of buffered DERP messages based on the system's available memory, ensuring that we never use a value lower than the previous constant of 32. Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ib763c877de4d0d4ee88869078e7d512f6a3a148d	2 years ago
James Tucker	40fa2a420c	envknob,net/tstun,wgengine: use TS_DEBUG_MTU consistently Noted on #5915 TS_DEBUG_MTU was not used consistently everywhere. Extract the default into a function that can apply this centrally and use it everywhere. Added envknob.Lookup{Int,Uint}Sized to make it easier to keep CodeQL happy when using converted values. Updates #5915 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Will Norris	e99c7c3ee5	sockstats: add labels for netlog and sockstatlog packages Signed-off-by: Will Norris <will@tailscale.com>	2 years ago
Maisem Ali	985535aebc	net/tstun,wgengine/*: add support for NAT to routes This adds support to make exit nodes and subnet routers work when in scenarios where NAT is required. It also updates the NATConfig to be generated from a `wgcfg.Config` as that handles merging prefs with the netmap, so it has the required information about whether an exit node is already configured and whether routes are accepted. Updates tailscale/corp#8020 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
James Tucker	c628132b34	wgengine/netstack: do not send packets to netstack after close Use the local context on Impl to check for shut down state in order to drop rather than inject packets after close has begun. Netstack sets endpoint.dispatcher to nil during shutdown. After the recent adjustment in `920ec69241` we now wait for netstack to fully shutdown before we release tests. This means that we may continue to accept packets and attempt to inject them, which we must prevent in order to avoid nil pointer panic. References google/gvisor#8765 Fixes #7715 Signed-off-by: James Tucker <james@tailscale.com>	2 years ago
Jordan Whited	27e37cf9b3	go.mod, net/tstun, wgengine/magicsock: update wireguard-go (#7712 ) This commit updates the wireguard-go dependency to pull in fixes for the tun package, specifically 052af4a and aad7fca. Signed-off-by: Jordan Whited <jordan@tailscale.com>	2 years ago
Maisem Ali	920ec69241	tsnet,wgenegine/netstack: add test and fix resource leaks We were not closing the http.Server and were also not waiting for netstack to fully close. Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
valscale	74eb99aed1	derp, derphttp, magicsock: send new unknown peer frame when destination is unknown (#7552 ) * wgengine/magicsock: add envknob to send CallMeMaybe to non-existent peer For testing older client version responses to the PeerGone packet format change. Updates #4326 Signed-off-by: Val <valerie@tailscale.com> * derp: remove dead sclient struct member replaceLimiter Leftover from an previous solution to the duplicate client problem. Updates #2751 Signed-off-by: Val <valerie@tailscale.com> * derp, derp/derphttp, wgengine/magicsock: add new PeerGone message type Not Here Extend the PeerGone message type by adding a reason byte. Send a PeerGone "Not Here" message when an endpoint sends a disco message to a peer that this server has no record of. Fixes #4326 Signed-off-by: Val <valerie@tailscale.com> --------- Signed-off-by: Val <valerie@tailscale.com>	2 years ago
Maisem Ali	bb31fd7d1c	net/tstun: add inital support for NAT v4 This adds support in tstun to utitilize the SelfNodeV4MasqAddrForThisPeer and perform the necessary modifications to the packet as it passes through tstun. Currently this only handles ICMP, UDP and TCP traffic. Subnet routers and Exit Nodes are also unsupported. Updates tailscale/corp#8020 Co-authored-by: Melanie Warrick <warrick@tailscale.com> Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	535fad16f8	net/tstun: rename filterIn/filterOut methods to be more descriptive Updates tailscale/corp#8020 Signed-off-by: Maisem Ali <maisem@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
Maisem Ali	b0cb39cda1	tsnet: only intercept TCP flows that have listeners Previously, it would accept all TCP connections and then close the ones it did not care about. Make it only ever accept the connections that it cares about. Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Andrew Dunham	be107f92d3	wgengine/magicsock: track per-endpoint changes in ringbuffer This change adds a ringbuffer to each magicsock endpoint that keeps a fixed set of "changes"–debug information about what updates have been made to that endpoint. Additionally, this adds a LocalAPI endpoint and associated "debug peer-status" CLI subcommand to fetch the set of changes for a given IP or hostname. Updates tailscale/corp#9364 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I34f726a71bddd0dfa36ec05ebafffb24f6e0516a	2 years ago
Mihai Parparita	6ac6ddbb47	sockstats: switch label to enum Makes it cheaper/simpler to persist values, and encourages reuse of labels as opposed to generating an arbitrary number. Updates tailscale/corp#9230 Updates #3363 Signed-off-by: Mihai Parparita <mihai@tailscale.com>	2 years ago
Brad Fitzpatrick	9ff51ca17f	wgengine/netstack: add support for custom UDP flow handlers To be used by tsnet and sniproxy later. Updates #5871 Updates #1748 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Maisem Ali	1a30b2d73f	all: use tstest.Replace more Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago

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