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81 Commits

Author SHA1 Message Date
David Anderson
30f5d706a1 net/dns/resolver: remove unnecessary/racy WaitGroup. 
Fixes #1663

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-22 19:17:37 -07:00
David Anderson
89c81c26c5 net/dns: fix resolved match domains when no nameservers are provided. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-20 17:10:39 -07:00
David Anderson
4be26b269f net/dns: correctly capture all traffic in non-split configs. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-20 16:57:46 -07:00
David Anderson
ca283ac899 net/dns: remove config in openresolv when given an empty DNS config. 
Part of #1720.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-20 16:19:34 -07:00
David Anderson
53213114ec net/dns: make debian_resolvconf correctly clear DNS configs. 
More of #1720.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-20 15:51:14 -07:00
David Anderson
3b1ab78954 net/dns: restore resolv.conf when given an empty config in directManager. 
Fixes #1720.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-20 15:14:40 -07:00
David Anderson
158328ba24 net/dns: remove ForceSplitDNSForTesting. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-20 12:50:08 -07:00
David Anderson
bb0710d51d net/dns: add debugging traces to DNS manager selection on linux. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-14 15:52:41 -07:00
David Anderson
4b70c7b717 net/dns: fix inverted test for NetworkManager. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-14 15:52:22 -07:00
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>
 2021-04-14 15:35:32 -07:00
David Anderson
1f9b73a531 net/dns: fix freebsd DNS manager selection. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-14 15:34:59 -07:00
Brad Fitzpatrick
c2ca2ac8c4 net/dns: fix FreeBSD build 
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-04-13 17:38:17 -07:00
David Anderson
84bd50329a net/dns: fix staticheck. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-13 17:28:37 -07:00
David Anderson
d6bb11b5bf net/dns: implement correct manager detection on linux. 
Part of #953.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-13 17:19:00 -07:00
David Anderson
9ef932517b net/dns: fix NM's GetBaseConfig when no configs exist. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-13 17:19:00 -07:00
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