Commit Graph

172 Commits (a54d13294f9a995f860099430d56acf05377a9e3)

Author SHA1 Message Date
David Anderson 4849a4d3c8 net/dns: error out on linux if /etc/resolv.conf can't be read.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson 1f9b73a531 net/dns: fix freebsd DNS manager selection.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
Brad Fitzpatrick c2ca2ac8c4 net/dns: fix FreeBSD build
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
David Anderson 84bd50329a net/dns: fix staticheck.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson d6bb11b5bf net/dns: implement correct manager detection on linux.
Part of #953.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson 9ef932517b net/dns: fix NM's GetBaseConfig when no configs exist.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson fe3b1ab747 net/dns: refactor dbus connection setup in resolved manager.
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 9aa33b43e6 net/dns: support split and unsplit DNS in NetworkManager.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson 87eb8384f5 net/dns: fix up NetworkManager configurator a bit.
Clear LLMNR and mdns flags, update reasoning for our settings,
and set our override priority harder than before when we want
to be primary resolver.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson 3d81e6260b net/dns: set resolved DefaultRoute setting according to split-dns mode.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson cca230cc23 net/dns: fix staticcheck errors.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
Brad Fitzpatrick 4b47393e0c net/dns: pacify staticcheck for now
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
David Anderson a7340c2015 net/dns: support split DNS in systemd-resolved.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson 84430cdfa1 net/dns: improve NetworkManager detection, using more DBus.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson 9a48bac8ad net/dns: rename resolvconf.go to debian_resolvconf.go.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson 9831f1b183 net/dns: also include 'tail' and 'base' files when fixing up resolv.conf.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson e43afe9140 net/dns: implement prior config reading for debian resolvconf.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson 143e5dd087 net/dns: rename script variable.
Debian resolvconf is not legacy, it's alive and well,
just historically before the other implementations.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson 55b39fa945 net/dns: add documentation to openresolv's config fetch.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson 61b361bac0 net/dns: teach the openresolv manager to read DNS config.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson 58760f7b82 net/dns: split resolvconfManager into a debian and an openresolv manager.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson 5480189313 net/dns: implement a DNS override workaround for legacy resolvconf.
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 e638a4d86b net/dns: make directManager support split DNS, and work in sandboxes.
Fixes #1495, #683.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson 2685260ba1 net/dns: add temporary fallback to quad-9 resolver for split-DNS testing.
This allows split-DNS configurations to not break clients on OSes that
haven't yet been ported to understand split DNS, by falling back to quad-9
as a global resolver when handed an "impossible to implement"
split-DNS config.

Part of #953. Needs to be removed before shipping 1.8.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson b9e194c14b net/dns: add missing FQDN qualification.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson b74a8994ca net/dns: make FQDN dot style consistent in more places.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson 6def647514 net/dns/resolver: don't avoid tailscale routes for DNS forwarding.
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 720c1ad0f0 net/dns: insert OS base config when emulating split DNS.
Part of #953.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson e560be6443 net/dns: sort matchDomains to avoid test flake.
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 fe9cd61d71 net/dns: add tests for DNS config generation.
Part of #953.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson 0ba6d03768 net/dns/resolver: add a test helper to get at the resolver config.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson da4cc8bbb4 net/dns: handle all possible translations of high-level DNS config.
With this change, all OSes can sort-of do split DNS, except that the
default upstream is hardcoded to 8.8.8.8 pending further plumbing.
Additionally, Windows 8-10 can do split DNS fully correctly, without
the 8.8.8.8 hack.

Part of #953.

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 c16a926bf2 net/dns: set OSConfig.Primary.
OS implementations are going to support split DNS soon.
Until they're all in place, hardcode Primary=true to get
the old behavior.

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 7d84ee6c98 net/dns: unify the OS manager and internal resolver.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson 1bf91c8123 net/dns/resolver: remove unused err return value.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson 6a206fd0fb net/dns: rename impl to os.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson c4530971db net/dns/resolver: remove leftover debug print.
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 748670f1e9 net/dns: fix typo in docstring.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson a39d2403bc net/dns: disable NetworkManager and resolved configurators temporarily.
They need some rework to do the right thing, in the meantime the direct
and resolvconf managers will work out.

The resolved implementation was never selected due to control-side settings.
The networkmanager implementation mostly doesn't get selected due to
unforeseen interactions with `resolvconf` on many platforms.
Both implementations also need rework to support the various routing modes
they're capable of.

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 077d4dc8c7 net/dns: add an OSConfigurator interface.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson 6ad44f9fdf wgengine: take in dns.Config, split out to resolver.Config and dns.OSConfig.
Stepping stone towards having the DNS package handle the config splitting.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson 2edb57dbf1 net/dns: add new Config that captures tailscale+OS DNS config.
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 0ca04f1e01 net/dns: put noop.go back, limit with build tags for staticcheck.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson 95470c3448 net/dns: remove Cleanup manager parameter.
It's only use to skip some optional initialization during cleanup,
but that work is very minor anyway, and about to change drastically.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson cf361bb9b1 net/dns: remove PerDomain from Config.
It's currently unused, and no longer makes sense with the upcoming
DNS infrastructure. Keep it in tailcfg for now, since we need protocol
compat for a bit longer.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson f77ba75d6c wgengine/router: move DNS cleanup into the DNS package.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson 9f105d3968 net/dns/resolver: teach the forwarder to do per-domain routing.
Given a DNS route map, the forwarder selects the right set of
upstreams for a given name.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson 90f82b6946 net/dns/resolver: add live reconfig, plumb through to ipnlocal.
The resolver still only supports a single upstream config, and
ipn/wgengine still have to split up the DNS config, but this moves
closer to unifying the DNS configs.

As a handy side-effect of the refactor, IPv6 MagicDNS records exist
now.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson caeafc4a32 net/dns/resolver: fix package docstring.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson dbe4f6f42d net/dns/resolver: unexport Resolve and ResolveReverse.
They're only used internally and in tests, and have surprising
semantics in that they only resolve MagicDNS names, not upstream
resolver queries.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson cdeb8d6816 net/dns/resolver: fix staticcheck error.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson f185d62dc8 net/dns/resolver: unexport Packet, only use it internally.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson 5fb9e00ecf net/dns/resolver: remove Start method, fully spin up in New instead.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson 075fb93e69 net/dns/resolver: remove the Config struct.
In preparation for reintroducing a runtime reconfig Config struct.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson bc81dd4690 net/dns/resolver: rename ResolverConfig to just Config.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson d99f5b1596 net/dns/resolver: factor the resolver out into a sub-package.
Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
David Anderson 6521f02ff6 Move DNS flush logic to net/dns.
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
David Anderson 8432999835 Move wgengine/tsdns to net/dns.
Straight move+fixup, no other changes. In prep for merging with
wgengine/router/dns.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago