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Commit Graph

66 Commits

Author SHA1 Message Date
David Anderson
fe3b1ab747 net/dns: refactor dbus connection setup in resolved manager. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-13 17:19:00 -07:00
David Anderson
854d5d36a1 net/dns: return error from NewOSManager, use it to initialize NM. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-12 15:51:37 -07:00
David Anderson
9aa33b43e6 net/dns: support split and unsplit DNS in NetworkManager. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-12 14:34:08 -07:00
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>
 2021-04-11 23:19:50 -07:00
David Anderson
3d81e6260b net/dns: set resolved DefaultRoute setting according to split-dns mode. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-11 20:53:28 -07:00
David Anderson
cca230cc23 net/dns: fix staticcheck errors. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-11 20:53:28 -07:00
Brad Fitzpatrick
4b47393e0c net/dns: pacify staticcheck for now 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-04-11 20:43:15 -07:00
David Anderson
a7340c2015 net/dns: support split DNS in systemd-resolved. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-11 18:14:23 -07:00
David Anderson
84430cdfa1 net/dns: improve NetworkManager detection, using more DBus. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-11 15:22:06 -07:00
David Anderson
9a48bac8ad net/dns: rename resolvconf.go to debian_resolvconf.go. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-10 23:31:14 -07:00
David Anderson
9831f1b183 net/dns: also include 'tail' and 'base' files when fixing up resolv.conf. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-10 23:01:11 -07:00
David Anderson
e43afe9140 net/dns: implement prior config reading for debian resolvconf. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-10 22:37:13 -07:00
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>
 2021-04-10 21:28:27 -07:00
David Anderson
55b39fa945 net/dns: add documentation to openresolv's config fetch. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-10 20:21:05 -07:00
David Anderson
61b361bac0 net/dns: teach the openresolv manager to read DNS config. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-10 19:37:11 -07:00
David Anderson
58760f7b82 net/dns: split resolvconfManager into a debian and an openresolv manager. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-10 18:55:05 -07:00
David Anderson
5480189313 net/dns: implement a DNS override workaround for legacy resolvconf. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-10 17:58:13 -07:00
David Anderson
1a371b93be util/dnsname: add FQDN type, use throughout codebase. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-10 17:58:13 -07:00
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>
 2021-04-09 02:52:21 -07:00
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>
 2021-04-08 23:26:22 -07:00
David Anderson
b9e194c14b net/dns: add missing FQDN qualification. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-08 23:07:16 -07:00
David Anderson
b74a8994ca net/dns: make FQDN dot style consistent in more places. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-08 22:03:32 -07:00
David Anderson
6def647514 net/dns/resolver: don't avoid tailscale routes for DNS forwarding. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-08 12:20:42 -07:00
David Anderson
4a64d2a603 net/dns: some post-review cleanups. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-07 15:40:31 -07:00
David Anderson
720c1ad0f0 net/dns: insert OS base config when emulating split DNS. 
Part of #953.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-07 15:40:31 -07:00
David Anderson
e560be6443 net/dns: sort matchDomains to avoid test flake. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-07 15:40:31 -07:00
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>
 2021-04-07 15:40:31 -07:00
David Anderson
fe9cd61d71 net/dns: add tests for DNS config generation. 
Part of #953.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-07 15:40:31 -07:00
David Anderson
0ba6d03768 net/dns/resolver: add a test helper to get at the resolver config. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-07 15:40:31 -07:00
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>
 2021-04-07 15:40:31 -07:00
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>
 2021-04-06 15:27:09 -07:00
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>
 2021-04-06 15:27:09 -07:00
David Anderson
3e915ac783 net/dns: implement OS-level split DNS for Windows. 
Part of #953.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-05 22:53:10 -07:00
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>
 2021-04-05 22:53:10 -07:00
David Anderson
de6dc4c510 net/dns: add a Primary field to OSConfig. 
Currently ignored.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-05 13:05:47 -07:00
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>
 2021-04-05 10:55:35 -07:00
David Anderson
7d84ee6c98 net/dns: unify the OS manager and internal resolver. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-05 10:55:35 -07:00
David Anderson
1bf91c8123 net/dns/resolver: remove unused err return value. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-05 10:55:35 -07:00
David Anderson
6a206fd0fb net/dns: rename impl to os. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-05 10:55:35 -07:00
David Anderson
c4530971db net/dns/resolver: remove leftover debug print. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-05 10:55:35 -07:00
David Anderson
4c61ebacf4 wgengine: move DNS configuration out of wgengine/router. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-05 10:55:35 -07:00
David Anderson
748670f1e9 net/dns: fix typo in docstring. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-02 18:44:02 -07:00
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>
 2021-04-02 02:41:33 -07:00
David Anderson
befd8e4e68 net/dns: replace managerImpl with OSConfigurator in code. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-02 02:34:40 -07:00
David Anderson
077d4dc8c7 net/dns: add an OSConfigurator interface. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-02 01:49:17 -07:00
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>
 2021-04-02 00:59:44 -07:00
David Anderson
2edb57dbf1 net/dns: add new Config that captures tailscale+OS DNS config. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-02 00:59:44 -07:00
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>
 2021-04-02 00:59:44 -07:00
David Anderson
fcfc0d3a08 net/dns: remove ManagerConfig, pass relevant args directly. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-01 23:26:52 -07:00
David Anderson
0ca04f1e01 net/dns: put noop.go back, limit with build tags for staticcheck. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-01 23:14:13 -07:00