341 Commits (048cb61dd07ec2bbf7fafb28a605fce5dd61234d)

Author	SHA1	Message	Date
Andrew Dunham	b85c2b2313	net/dns/resolver: use SystemDial in DoH forwarder ... This ensures that we close the underlying connection(s) when a major link change happens. If we don't do this, on mobile platforms switching between WiFi and cellular can result in leftover connections in the http.Client's connection pool which are bound to the "wrong" interface. Updates #10821 Updates tailscale/corp#19124 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ibd51ce2efcaf4bd68e14f6fdeded61d4e99f9a01	7 months ago
Brad Fitzpatrick	7c1d6e35a5	all: use Go 1.22 range-over-int ... Updates #11058 Change-Id: I35e7ef9b90e83cac04ca93fd964ad00ed5b48430 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	7 months ago
Aaron Klotz	4d5d669cd5	net/dns: unconditionally write NRPT rules to local settings ... We were being too aggressive when deciding whether to write our NRPT rules to the local registry key or the group policy registry key. After once again reviewing the document which calls itself a spec (see issue), it is clear that the presence of the DnsPolicyConfig subkey is the important part, not the presence of values set in the DNSClient subkey. Furthermore, a footnote indicates that the presence of DnsPolicyConfig in the GPO key will always override its counterpart in the local key. The implication of this is important: we may unconditionally write our NRPT rules to the local key. We copy our rules to the policy key only when it contains NRPT rules belonging to somebody other than us. Fixes https://github.com/tailscale/corp/issues/19071 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	8 months ago
James Tucker	db760d0bac	cmd/tailscaled: move cleanup to an implicit action during startup ... This removes a potentially increased boot delay for certain boot topologies where they block on ExecStartPre that may have socket activation dependencies on other system services (such as systemd-resolved and NetworkManager). Also rename cleanup to clean up in affected/immediately nearby places per code review commentary. Fixes #11599 Signed-off-by: James Tucker <james@tailscale.com>	8 months ago
alexelisenko	fe22032fb3	net/dns/{publicdns,resolver}: add start of Control D support ... Updates #7946 [@bradfitz fixed up version of #8417] Change-Id: I1dbf6fa8d525b25c0d7ad5c559a7f937c3cd142a Signed-off-by: alexelisenko <39712468+alexelisenko@users.noreply.github.com> Signed-off-by: Alex Paguis <alex@windscribe.com>	8 months ago
Brad Fitzpatrick	8d7894c68e	clientupdate, net/dns: fix some "tailsacle" typos ... Updates #cleanup Change-Id: I982175e74b0c8c5b3e01a573e5785e6596b7ac39 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	8 months ago
Asutorufa	e20ce7bf0c	net/dns: close ctx when close dns directManager ... Signed-off-by: Asutorufa <16442314+Asutorufa@users.noreply.github.com>	8 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
Nick Khyl	b42b9817b0	net/dns: do not wait for the interface registry key to appear if the windowsManager is being closed ... The WinTun adapter may have been removed by the time we're closing the dns.windowsManager, and its associated interface registry key might also have been deleted. We shouldn't use winutil.OpenKeyWait and wait for the interface key to appear when performing a cleanup as a part of the windowsManager shutdown. Updates #11222 Signed-off-by: Nick Khyl <nickk@tailscale.com>	9 months ago
mrrfv	ff1391a97e	net/dns/publicdns: add Mullvad family DNS to the list of known DoH servers ... Adds the new Mullvad family DNS server to the known DNS over HTTPS server list. Signed-off-by: mrrfv <rm-rfv-no-preserve-root@protonmail.com>	9 months ago
James Tucker	8d0d46462b	net/dns: timeout DOH requests after 10s without response headers ... If a client socket is remotely lost but the client is not sent an RST in response to the next request, the socket might sit in RTO for extended lengths of time, resulting in "no internet" for users. Instead, timeout after 10s, which will close the underlying socket, recovering from the situation more promptly. Updates #10967 Signed-off-by: James Tucker <james@tailscale.com>	9 months ago
Andrew Dunham	70b7201744	net/dns: fix infinite loop when run on Amazon Linux 2023 ... This fixes an infinite loop caused by the configuration of systemd-resolved on Amazon Linux 2023 and how that interacts with Tailscale's "direct" mode. We now drop the Tailscale service IP from the OS's "base configuration" when we detect this configuration. Updates #7816 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I73a4ea8e65571eb368c7e179f36af2c049a588ee	9 months ago
Andrew Dunham	b0e96a6c39	net/dns: log more info when openresolv commands fail ... Updates #11129 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ic594868ba3bc31f6d3b0721ecba4090749a81f7f	10 months ago
Andrew Dunham	35c303227a	net/dns/resolver: add ID to verbose logs in forwarder ... To make it easier to correlate the starting/ending log messages. Updates #cleanup Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I2802d53ad98e19bc8914bc58f8c04d4443227b26	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
Aaron Klotz	64a26b221b	net/dns: use an additional registry setting to disable dynamic DNS updates for our interface on Windows ... Fixes #9775 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	12 months ago
Juergen Knaack	c27aa9e7ff	net/dns: fix darwin dns resolver files ... putting each nameserver on one line in /etc/resolver/<domain> fixes: #10134 Signed-off-by: Juergen Knaack <jk@jk-1.de>	1 year ago
Ryan Petris	c4855fe0ea	Fix Empty Resolver Set ... Config.singleResolverSet returns true if all routes have the same resolvers, even if the routes have no resolvers. If none of the routes have a specific resolver, the default should be used instead. Therefore, check for more than 0 instead of nil. Signed-off-by: Ryan Petris <ryan@petris.net>	1 year ago
James Tucker	b48b7d82d0	appc,ipn/ipnlocal,net/dns/resolver: add App Connector wiring when enabled in prefs ... An EmbeddedAppConnector is added that when configured observes DNS responses from the PeerAPI. If a response is found matching a configured domain, routes are advertised when necessary. The wiring from a configuration in the netmap capmap is not yet done, so while the connector can be enabled, no domains can yet be added. Updates tailscale/corp#15437 Signed-off-by: James Tucker <james@tailscale.com>	1 year ago
Andrew Dunham	57c5b5a77e	net/dns/recursive: update IP for b.root-servers.net ... As of 2023-11-27, the official IP addresses for b.root-servers.net will change to a new set, with the older IP addresses supported for at least a year after that date. These IPs are already active and returning results, so update these in our recursive DNS resolver package so as to be ready for the switchover. See: https://b.root-servers.org/news/2023/05/16/new-addresses.html Fixes #9994 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I29e2fe9f019163c9ec0e62bdb286e124aa90a487	1 year ago
Denton Gentry	97ee3891f1	net/dns: use direct when NetworkManager has no systemd-resolved ... Endeavour OS, at least, uses NetworkManager 1.44.2 and does not use systemd-resolved behind the scenes at all. If we find ourselves in that situation, return "direct" not "systemd-resolved" Fixes https://github.com/tailscale/tailscale/issues/9687 Signed-off-by: Denton Gentry <dgentry@tailscale.com>	1 year ago
Galen Guyer	04a8b8bb8e	net/dns: properly detect newer debian resolvconf ... Tailscale attempts to determine if resolvconf or openresolv is in use by running `resolvconf --version`, under the assumption this command will error when run with Debian's resolvconf. This assumption is no longer true and leads to the wrong commands being run on newer versions of Debian with resolvconf >= 1.90. We can now check if the returned version string starts with "Debian resolvconf" if the command is successful. Fixes #9218 Signed-off-by: Galen Guyer <galen@galenguyer.com>	1 year ago
Brad Fitzpatrick	7868393200	net/dns/resolver, ipnlocal: fix ExitDNS on Android and iOS ... Advertise it on Android (it looks like it already works once advertised). And both advertise & likely fix it on iOS. Yet untested. Updates #9672 Change-Id: If3b7e97f011dea61e7e75aff23dcc178b6cf9123 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
Andrew Dunham	91b9899402	net/dns/resolver: fix flaky test ... Updates #cleanup Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I2d073220bb6ac78ba88d8be35085cc23b727d69f	1 year ago
Andrew Dunham	286c6ce27c	net/dns/resolver: race UDP and TCP queries (#9544) ... Instead of just falling back to making a TCP query to an upstream DNS server when the UDP query returns a truncated query, also start a TCP query in parallel with the UDP query after a given race timeout. This ensures that if the upstream DNS server does not reply over UDP (or if the response packet is blocked, or there's an error), we can still make queries if the server replies to TCP queries. This also adds a new package, util/race, to contain the logic required for racing two different functions and returning the first non-error answer. Updates tailscale/corp#14809 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I4311702016c1093b1beaa31b135da1def6d86316	1 year ago
Andrew Dunham	530aaa52f1	net/dns: retry forwarder requests over TCP ... We weren't correctly retrying truncated requests to an upstream DNS server with TCP. Instead, we'd return a truncated request to the user, even if the user was querying us over TCP and thus able to handle a large response. Also, add an envknob and controlknob to allow users/us to disable this behaviour if it turns out to be buggy (✨ DNS ✨). Updates #9264 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ifb04b563839a9614c0ba03e9c564e8924c1a2bfd	1 year ago
Brad Fitzpatrick	3b32d6c679	wgengine/magicsock, controlclient, net/dns: reduce some logspam ... Updates #cleanup Change-Id: I78b0697a01e94baa33f3de474b591e616fa5e6af Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	1 year ago
James Tucker	1c88a77f68	net/dns/publicdns: update Quad9 addresses and references ... One Quad9 IPv6 address was incorrect, and an additional group needed adding. Additionally I checked Cloudflare and included source reference URLs for both. Updates #cleanup Signed-off-by: James Tucker <james@tailscale.com>	1 year ago
James Tucker	4c693d2ee8	net/dns/publicdns: update Mullvad DoH server list ... The following IPs are not used anymore: 193.19.108.2 and 193.19.108.3. All of the servers are now named consistently under dns.mullvad.net. Several new servers were added. https://mullvad.net/en/help/dns-over-https-and-dns-over-tls/ Updates #5416 Updates #9345 Signed-off-by: James Tucker <james@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
Andrew Dunham	d413dd7ee5	net/dns/publicdns: add support for Wikimedia DNS ... RELNOTE=Adds support for Wikimedia DNS Updates #9255 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I4213c29e0f91ea5aa0304a5a026c32b6690fead9	1 year ago
Brad Fitzpatrick	11ece02f52	net/{interfaces,netmon}: remove "interesting", EqualFiltered API ... This removes a lot of API from net/interfaces (including all the filter types, EqualFiltered, active Tailscale interface func, etc) and moves the "major" change detection to net/netmon which knows more about the world and the previous/new states. Updates #9040 Change-Id: I7fe66a23039c6347ae5458745b709e7ebdcce245 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
Brad Fitzpatrick	be4eb6a39e	derp, net/dns/recursive: use Go 1.21 min ... Updates #8419 Signed-off-by: Brad Fitzpatrick <bradfitz@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
Michael Stapelberg	2a6c237d4c	net/dns: overwrite /tmp/resolv.conf on gokrazy ... Appliances built using https://gokrazy.org/ have a read-only root file system, including /etc/resolv.conf, which is a symlink to /tmp/resolv.conf. The system’s dhcp client overwrites /tmp/resolv.conf instead, so we need to use this path in Tailscale, too. related to https://github.com/gokrazy/gokrazy/issues/209 fixes https://github.com/tailscale/tailscale/issues/8689 Signed-off-by: Michael Stapelberg <michael@stapelberg.de>	1 year ago
Anton Tolchanov	388b124513	net/dns: detect when libnss_resolve is used ... Having `127.0.0.53` is not the only way to use `systemd-resolved`. An alternative way is to enable `libnss_resolve` module, which seems to now be used by default on Debian 12 bookworm. Fixes #8549 Signed-off-by: Anton Tolchanov <anton@tailscale.com>	1 year ago
Adrian Dewhurst	cd4c71c122	tstest: prepare for Clock API changes ... This change introduces tstime.NewClock and tstime.ClockOpts as a new way to construct tstime.Clock. This is a subset of #8464 as a stepping stone so that we can update our internal code to use the new API before making the second round of changes. Updates #8463 Change-Id: Ib26edb60e5355802aeca83ed60e4fdf806c90e27 Signed-off-by: Adrian Dewhurst <adrian@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
Andrew Dunham	b6d20e6f8f	go.mod, net/dns/recursive: update github.com/miekg/dns ... Updates #cleanup Change-Id: If4de6a84448a17dd81cc2a8af788bd18c3d0bbe3 Signed-off-by: Andrew Dunham <andrew@du.nham.ca>	1 year ago
Andrew Dunham	f077b672e4	net/dns/recursive: add initial implementation of recursive DNS resolver ... We've talked in the past about reworking how bootstrap DNS works to instead do recursive DNS resolution from the root; this would better support on-prem customers and Headscale users where the DERP servers don't currently resolve their DNS server. This package is an initial implementation of recursive resolution for A and AAAA records. Updates #5853 Change-Id: Ibe974d78709b4b03674b47c4ef61f9a00addf8b4 Signed-off-by: Andrew Dunham <andrew@du.nham.ca>	1 year 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	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
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
Andrew Dunham	33b359642e	net/dns: don't send on closed channel in resolvedManager ... Fixes #7686 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Ibffb05539ab876b12407d77dcf2201d467895981	2 years ago
Andrew Dunham	83fa17d26c	various: pass logger.Logf through to more places ... Updates #7537 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: Id89acab70ea678c8c7ff0f44792d54c7223337c6	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