tailscale

Commit Graph

Author	SHA1	Message	Date
Nick Khyl	4dfde7bffc	net/dns: disable DNS registration for Tailscale interface on Windows We already disable dynamic updates by setting DisableDynamicUpdate to 1 for the Tailscale interface. However, this does not prevent non-dynamic DNS registration from happening when `ipconfig /registerdns` runs and in similar scenarios. Notably, dns/windowsManager.SetDNS runs `ipconfig /registerdns`, triggering DNS registration for all interfaces that do not explicitly disable it. In this PR, we update dns/windowsManager.disableDynamicUpdates to also set RegistrationEnabled to 0. Fixes #13411 Signed-off-by: Nick Khyl <nickk@tailscale.com>	2 months ago
Nick Khyl	c32efd9118	various: create a catch-all NRPT rule when "Override local DNS" is enabled on Windows Without this rule, Windows 8.1 and newer devices issue parallel DNS requests to DNS servers associated with all network adapters, even when "Override local DNS" is enabled and/or a Mullvad exit node is being used, resulting in DNS leaks. This also adds "disable-local-dns-override-via-nrpt" nodeAttr that can be used to disable the new behavior if needed. Fixes tailscale/corp#20718 Signed-off-by: Nick Khyl <nickk@tailscale.com>	5 months ago
Aaron Klotz	3511d1f8a2	cmd/tailscaled, net/dns, wgengine/router: start Windows child processes with DETACHED_PROCESS when I/O is being piped When we're starting child processes on Windows that are CLI programs that don't need to output to a console, we should pass in DETACHED_PROCESS as a CreationFlag on SysProcAttr. This prevents the OS from even creating a console for the child (and paying the associated time/space penalty for new conhost processes). This is more efficient than letting the OS create the console window and then subsequently trying to hide it, which we were doing at a few callsites. Fixes #12270 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	5 months ago
Brad Fitzpatrick	745931415c	health, all: remove health.Global, finish plumbing health.Tracker Updates #11874 Updates #4136 Change-Id: I414470f71d90be9889d44c3afd53956d9f26cd61 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	6 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
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>	8 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>	8 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>	11 months ago
Aaron Klotz	9687f3700d	net/dns: deal with Windows wsl.exe hangs Despite the fact that WSL configuration is still disabled by default, we continue to log the machine's list of WSL distros as a diagnostic measure. Unfortunately I have seen the "wsl.exe -l" command hang indefinitely. This patch adds a (more than reasonable) 10s timeout to ensure that tailscaled does not get stuck while executing this operation. I also modified the Windows implementation of NewOSConfigurator to do the logging asynchronously, since that information is not required in order to continue starting up. Fixes #7476 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	2 years ago
Will Norris	71029cea2d	all: update copyright and license headers This updates all source files to use a new standard header for copyright and license declaration. Notably, copyright no longer includes a date, and we now use the standard SPDX-License-Identifier header. This commit was done almost entirely mechanically with perl, and then some minimal manual fixes. Updates #6865 Signed-off-by: Will Norris <will@tailscale.com>	2 years ago
Andrew Dunham	ec790e58df	net/dns: retry overwriting hosts file on Windows Updates #5753 Signed-off-by: Andrew Dunham <andrew@du.nham.ca> Change-Id: I60f81bd3325d5ba5383b947c7a7aaa5b14e460f6	2 years ago
Aaron Klotz	41e1d336cc	net/dns: change windows DNS manager to use pointer receiver This is safer given that we need to close the NRPT database. Signed-off-by: Aaron Klotz <aaron@tailscale.com>	2 years ago
Brad Fitzpatrick	74674b110d	envknob: support changing envknobs post-init Updates #5114 Change-Id: Ia423fc7486e1b3f3180a26308278be0086fae49b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	9bd9f37d29	go.mod: bump wireguard/windows, which moves to using net/netip Updates #5162 Change-Id: If99a3f0000bce0c01bdf44da1d513f236fd7cdf8 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Maisem Ali	68d9d161f4	net/dns: [win] fix regression in disableDynamicUpdate Somehow I accidentally set the wrong registry value here. It should be DisableDynamicUpdate=1 and not EnableDNSUpdate=0. This is a regression from `545639e`. Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	9197dd14cc	net/dns: [win] add MagicDNS entries to etc/hosts This works around the 2.3s delay in short name lookups when SNR is enabled. C:\Windows\System32\drivers\etc\hosts file. We only add known hosts that match the search domains, and we populate the list in order of Search Domains so that our matching algorithm mimics what Windows would otherwise do itself if SNR was off. Updates #1659 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	25865f81ee	net/dns: disable NetBIOS on Tailscale interfaces Like LLMNR, NetBIOS also adds resolution delays and we don't support it anyway so just disable it on the interface. Updates #1659 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Maisem Ali	545639ee44	util/winutil: consolidate interface specific registry keys Code movement to allow reuse in a follow up PR. Updates #1659 Signed-off-by: Maisem Ali <maisem@tailscale.com>	2 years ago
Brad Fitzpatrick	8725b14056	all: migrate more code code to net/netip directly Instead of going through the tailscale.com/net/netaddr transitional wrappers. Updates #5162 Change-Id: I3dafd1c2effa1a6caa9b7151ecf6edd1a3fda3dd Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	a12aad6b47	all: convert more code to use net/netip directly perl -i -npe 's,netaddr.IPPrefixFrom,netip.PrefixFrom,' $(git grep -l -F netaddr.) perl -i -npe 's,netaddr.IPPortFrom,netip.AddrPortFrom,' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IPPrefix,netip.Prefix,g' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IPPort,netip.AddrPort,g' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IP\b,netip.Addr,g' $(git grep -l -F netaddr. ) perl -i -npe 's,netaddr.IPv6Raw\b,netip.AddrFrom16,g' $(git grep -l -F netaddr. ) goimports -w . Then delete some stuff from the net/netaddr shim package which is no longer neeed. Updates #5162 Change-Id: Ia7a86893fe21c7e3ee1ec823e8aba288d4566cd8 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	6a396731eb	all: use various net/netip parse funcs directly Mechanical change with perl+goimports. Changed {Must,}Parse{IP,IPPrefix,IPPort} to their netip variants, then goimports -d . Finally, removed the net/netaddr wrappers, to prevent future use. Updates #5162 Change-Id: I59c0e38b5fbca5a935d701645789cddf3d7863ad Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Brad Fitzpatrick	7eaf5e509f	net/netaddr: start migrating to net/netip via new netaddr adapter package Updates #5162 Change-Id: Id7bdec303b25471f69d542f8ce43805328d56c12 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	2 years ago
Aaron Klotz	1cae618b03	net/dns: add Windows group policy notifications to the NRPT rule manager As discussed in previous PRs, we can register for notifications when group policies are updated and act accordingly. This patch changes nrptRuleDatabase to receive notifications that group policy has changed and automatically move our NRPT rules between the local and group policy subkeys as needed. Signed-off-by: Aaron Klotz <aaron@tailscale.com>	2 years ago
Aaron Klotz	4baf34cf25	net/dns: set appropriate Windows registry values to prevent it from sending DNS changes concerning our interface to AD domain controllers. We do this unconditionally inside SetDNS such that the values are always set before we make any other changes to DNS configurations. It should not be harmful for the settings to remain even when other DNS settings are cleared out (since they only affect our network interface). See https://docs.microsoft.com/en-us/troubleshoot/windows-server/networking/configure-dns-dynamic-updates-windows-server-2003 for details about the registry value. Fixes https://github.com/tailscale/tailscale/issues/4829 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	2 years ago
Aaron Klotz	8cdfd12977	net/dns: update Windows split DNS settings to work alongside other NRPT entries set by group policy. When there are group policy entries for the NRPT that do not belong to Tailscale, we recognize that we need to add ourselves to group policy and use that registry key instead of the local one. We also refresh the group policy settings as necessary to ensure that our changes take effect immediately. Fixes https://github.com/tailscale/tailscale/issues/4607 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	2 years ago
Aaron Klotz	b005b79236	net/dns, paths, util/winutil: change net/dns/windowsManager NRPT management to support more than 50 domains. AFAICT this isn't documented on MSDN, but based on the issue referenced below, NRPT rules are not working when a rule specifies > 50 domains. This patch modifies our NRPT rule generator to split the list of domains into chunks as necessary, and write a separate rule for each chunk. For compatibility reasons, we continue to use the hard-coded rule ID, but as additional rules are required, we generate new GUIDs. Those GUIDs are stored under the Tailscale registry path so that we know which rules are ours. I made some changes to winutils to add additional helper functions in support of both the code and its test: I added additional registry accessors, and also moved some token accessors from paths to util/winutil. Fixes https://github.com/tailscale/coral/issues/63 Signed-off-by: Aaron Klotz <aaron@tailscale.com>	2 years ago
Brad Fitzpatrick	41fd4eab5c	envknob: add new package for all the strconv.ParseBool(os.Getenv(..)) A new package can also later record/report which knobs are checked and set. It also makes the code cleaner & easier to grep for env knobs. Change-Id: Id8a123ab7539f1fadbd27e0cbeac79c2e4f09751 Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Brad Fitzpatrick	8df3fa4638	net/dns: make WSL network configuration opt-in for now Tailscale seems to be breaking WSL configurations lately. Until we understand what changed, turn off Tailscale's involvement by default and make it opt-in. Updates #2815 Change-Id: I9977801f8debec7d489d97761f74000a4a33f71b Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>	3 years ago
Denton Gentry	260b85458c	net/dns: correct log message. Signed-off-by: Denton Gentry <dgentry@tailscale.com>	3 years ago
David Crawshaw	6b9f8208f4	net/dns: do not run wsl.exe as LocalSystem It doesn't work. It needs to run as the user. https://github.com/microsoft/WSL/issues/4803 The mechanism for doing this was extracted from: https://web.archive.org/web/20101009012531/http://blogs.msdn.com/b/winsdk/archive/2009/07/14/launching-an-interactive-process-from-windows-service-in-windows-vista-and-later.aspx While here, we also reclaculate WSL distro set on SetDNS. This accounts for: 1. potential inability to access wsl.exe on startup 2. WSL being installed while Tailscale is running 3. A new WSL distrobution being installed Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	3 years ago
David Crawshaw	1147c7fd4f	net/dns: set WSL /etc/resolv.conf We also have to make a one-off change to /etc/wsl.conf to stop every invocation of wsl.exe clobbering the /etc/resolv.conf. This appears to be a safe change to make permanently, as even though the resolv.conf is constantly clobbered, it is always the same stable internal IP that is set as a nameserver. (I believe the resolv.conf clobbering predates the MS stub resolver.) Tested on WSL2, should work for WSL1 too. Fixes #775 Signed-off-by: David Crawshaw <crawshaw@tailscale.com>	3 years ago
David Anderson	084d48d22d	net/dns: always proxy through quad-100 on windows 8.1. Windows 8.1 incorrectly handles search paths on an interface with no associated resolver, so we have to provide a full primary DNS config rather than use Windows 8.1's nascent-but-present NRPT functionality. Fixes #2237. Signed-off-by: David Anderson <danderson@tailscale.com>	3 years ago
David Anderson	44c2b7dc79	net/dns: on windows, skip site-local v6 resolvers. Further refinement for tailscale/corp#1662. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	854d5d36a1	net/dns: return error from NewOSManager, use it to initialize NM. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	1a371b93be	util/dnsname: add FQDN type, use throughout codebase. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	4a64d2a603	net/dns: some post-review cleanups. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	68f76e9aa1	net/dns: add GetBaseConfig to OSConfigurator interface. Part of #953, required to make split DNS work on more basic platforms. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	e0e677a8f6	net/dns: split out search domains and match domains in OSConfig. It seems that all the setups that support split DNS understand this distinction, and it's an important one when translating high-level configuration. Part of #953. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	a8dcda9c9a	net/dns: start of compat hacks for Windows 7. Correctly reports that Win7 cannot do split DNS, and has a helper to discover the "base" resolvers for the system. Part of #953 Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	3e915ac783	net/dns: implement OS-level split DNS for Windows. Part of #953. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	de6dc4c510	net/dns: add a Primary field to OSConfig. Currently ignored. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	b2a597b288	net/dns: rename Set to SetDNS in OSConfigurator. wgengine/router.CallbackRouter needs to support both the Router and OSConfigurator interfaces, so the setters can't both be called Set. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	4c61ebacf4	wgengine: move DNS configuration out of wgengine/router. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	befd8e4e68	net/dns: replace managerImpl with OSConfigurator in code. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	8af9d770cf	net/dns: rename Config to OSConfig. Making way for a new higher level config struct. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	fcfc0d3a08	net/dns: remove ManagerConfig, pass relevant args directly. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago
David Anderson	9f7f2af008	wgengine/router/dns: move to net/dns. Preparation for merging the APIs and whatnot. Signed-off-by: David Anderson <danderson@tailscale.com>	4 years ago

47 Commits (1cecc43522c4b3bb9beb3e3fbe42741cccdbcb1d)