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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 2f398106e2 ipn/ipnlocal: allow setting MagicDNS without DefaultResolvers. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-08 16:23:33 -07:00
David AndersonandDave Anderson fad21af01c tailcfg: add DNS routes and advanced resolver config. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-08 15:29:08 -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 AndersonandDave 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 AndersonandDave 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 AndersonandDave 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 AndersonandDave 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 AndersonandDave 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 AndersonandDave 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 AndersonandDave 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 AndersonandDave 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 AndersonandDave 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 AndersonandDave Anderson bc4381447f net/tstun: return the real interface name at device creation. 
This is usually the same as the requested interface, but on some
unixes can vary based on device number allocation, and on Windows
it's the GUID instead of the pretty name, since everything relating
to configuration wants the GUID.

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 AndersonandDave 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 AndersonandDave 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 AndersonandDave 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 AndersonandDave 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 AndersonandDave 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 AndersonandDave Anderson f007a9dd6b health: add DNS subsystem and plumb errors in. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-05 10:55:35 -07:00
David AndersonandDave 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 27a1a2976a wgengine/router: add a CallbackRouter shim. 
The shim implements both network and DNS configurators,
and feeds both into a single callback that receives
both configs.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-02 18:43:24 -07:00
David Anderson f89dc1c903 ipn/ipnlocal: don't install any magicdns names if not proxying. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-02 14:24:47 -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 AndersonandDave 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 AndersonandDave 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 AndersonandDave 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
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>
 2021-04-01 23:06:56 -07:00
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>
 2021-04-01 22:55:44 -07:00
David Anderson f77ba75d6c wgengine/router: move DNS cleanup into the DNS package. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-04-01 22:35:34 -07:00
David Anderson 15875ccc63 wgengine/router: don't store unused tunname on windows. 2021-04-01 22:28:24 -07:00
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>
 2021-04-01 19:42:48 -07:00
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>
 2021-04-01 01:44:03 -07:00
David Anderson caeafc4a32 net/dns/resolver: fix package docstring. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-31 23:42:28 -07:00
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>
 2021-03-31 23:35:26 -07:00
David Anderson cdeb8d6816 net/dns/resolver: fix staticcheck error. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-31 23:19:09 -07:00
David Anderson f185d62dc8 net/dns/resolver: unexport Packet, only use it internally. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-31 23:12:31 -07:00
David Anderson 5fb9e00ecf net/dns/resolver: remove Start method, fully spin up in New instead. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-31 23:12:31 -07:00
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>
 2021-03-31 23:12:31 -07:00
David Anderson bc81dd4690 net/dns/resolver: rename ResolverConfig to just Config. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-31 23:12:31 -07:00
David Anderson d99f5b1596 net/dns/resolver: factor the resolver out into a sub-package. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-31 23:12:30 -07:00
David Anderson 07bf4eb685 wgengine: rename Fake to RespondToPing. 
"Fake" doesn't mean a lot any more, given that many components
of the engine can be faked out, including in valid production
configurations like userspace-networking.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-28 21:45:02 -07:00
David Anderson 0fb738760f wgengine: make Tun optional again, default to fake. 
This makes setup more explicit in prod codepaths, without
requiring a bunch of arguments or helpers for tests and
userspace mode.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-28 21:45:02 -07:00
David Anderson 95ca86c048 go.mod: update to new wireguard-go version. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-28 19:05:55 -07:00
David Anderson 93a4aa697c wgengine: default Router to a no-op router. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-28 18:59:48 -07:00
David Anderson 440effb21a wgengine: remove Config.TUN argument. 2021-03-28 18:45:17 -07:00
David Anderson 2df8adef9d wgengine: make the tun.Device required at construction. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-27 00:33:09 -07:00
David Anderson 25e0bb0a4e net/tstun: rename wrap_windows.go to tun_windows.go. 
The code has nothing to do with wrapping, it's windows-specific
driver initialization code.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-26 23:17:59 -07:00
David Anderson 22d53fe784 net/tstun: document exported function. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-26 23:17:01 -07:00
David Anderson 016de16b2e net/tstun: rename TUN to Wrapper. 
The tstun packagen contains both constructors for generic tun
Devices, and a wrapper that provides additional functionality.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-26 23:15:22 -07:00
David Anderson 82ab7972f4 net/tstun: rename NewFakeTUN to NewFake. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-26 22:46:47 -07:00
David AndersonandDave Anderson 588b70f468 net/tstun: merge in wgengine/tstun. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-26 22:31:54 -07:00
David AndersonandDave Anderson 018200aeba net/tstun: rename from net/tun. 
We depend on wireguard-go/tun, identical leaf packages can be
confusing in code.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-26 22:31:54 -07:00
David AndersonandDave Anderson 2b4bfeda1a wgengine: pass in an explicit router.Router, rather than a generator. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-26 22:01:55 -07:00
David AndersonandDave Anderson 9ea5cbf81f cmd/tailscaled: readd tun.Diagnose call, mistakenly lost during refactor. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-26 22:01:55 -07:00
David AndersonandDave Anderson 44d9929208 wgengine: remove Config.TUNName, require caller to create device. 
Also factors out device creation and associated OS workarounds to
net/tun.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-26 21:08:11 -07:00
David AndersonandDave Anderson 0a84aaca0a wgengine/router: remove unused wireguard *Device argument. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-26 19:43:13 -07:00
David Anderson 672731ac6f many: gofmt. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-25 17:41:51 -07:00
David Anderson 6521f02ff6 Move DNS flush logic to net/dns. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-25 17:40:52 -07:00
David AndersonandDave Anderson 9f7f2af008 wgengine/router/dns: move to net/dns. 
Preparation for merging the APIs and whatnot.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-25 16:25:30 -07:00
David AndersonandDave 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>
 2021-03-25 16:25:30 -07:00
David AndersonandDave Anderson 8c0a0450d9 ipn/ipnlocal: allow client access to exit node's public IPs. 
"public IP" is defined as an IP address configured on the exit node
itself that isn't in the list of forbidden ranges (RFC1918, CGNAT,
Tailscale).

Fixes #1522.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-19 11:54:15 -07:00
David AndersonandDave Anderson 6fb5d4080c net/portmapper: silently handle PCP NOT_AUTHORIZED responses. 
Fixes #1525.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-17 19:44:35 -07:00
David Anderson 4543e4202f VERSION.txt: this is 1.7.0. 2021-03-16 19:04:55 -07:00
David Anderson 6f48a8422a version: remove version-info.sh when cleaning. 2021-03-16 16:38:19 -07:00
David Anderson 84aba349d9 Revert "wgengine/netstack: update gvisor to remove 64-bit only limitation" 
Breaks our corp repo due to gRPC dependency hell.

This reverts commit d42f8b7f9a.
 2021-03-16 15:36:06 -07:00
David Anderson 380a3526f6 cmd/tailscale/cli: warn if using subnet routing on BSD 
Fixes #1475.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-15 17:25:59 -07:00
David Anderson 1bc3c03562 control/controlclient: allow for an unset linkMon. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-11 21:21:15 -08:00
David Anderson fa6110e47b wgengine/router: don't touch interface routes 
Developed by a cast of dozens.

Fixes #1448

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-11 21:09:25 -08:00
David AndersonandDave Anderson 0b66cfe1e0 control/controlclient: report broken IP forwarding more precisely. 
IP forwarding is not required when advertising a machine's local IPs
over Tailscale.

Fixes #1435.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-11 10:49:57 -08:00
David Anderson bf0740b011 Merge branch 'main' of github.com:tailscale/tailscale into danderson/filter-privacy 2021-03-09 16:33:55 -08:00
David AndersonandDave Anderson a7f12a110a wgengine/filter: only log packets to/from non-default routes. 
Fixes tailscale/corp#1429.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-09 16:28:43 -08:00
David Anderson d79a2f3809 wgengine/filter: only log packets to/from non-default routes. 
Fixes tailscale/corp#1429.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-09 16:24:09 -08:00
David AndersonandDave Anderson 63a9adeb6c portlist: collect IPv6 listening sockets on linux. 
This is important because some of those v6 sockets are actually
dual-stacked sockets, so this is our only chance of discovering
some services.

Fixes #1443.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-04 13:52:56 -08:00
David AndersonandDave Anderson ad6edf5ecd portlist: report a better process name for .Net on linux. 
Fixes #1440.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-03 22:30:27 -08:00
David Anderson 2e347d1e10 tailcfg: tweak documentation for map version 11 
version: bump date.
 2021-03-03 15:06:35 -08:00
David Anderson ea49b1e811 tailcfg: bump map request version for v6 + default routes. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-03 12:01:15 -08:00
David AndersonandDave Anderson 1cb0ffc3ff wgengine/router: make windows gracefully handle disabled IPv4 or IPv6. 
This is necessary because either protocol can be disabled globally by a
Windows registry policy, at which point trying to touch that address
family results in "Element not found" errors. This change skips programming
address families that Windows tell us are unavailable.

Fixes #1396.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-03 11:48:17 -08:00
David Anderson 8d77dfdacb wgengine/router: add a dummy IPv6 address if needed for default routing. 
Fixes #1339

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-02 19:32:04 -08:00
David AndersonandDave Anderson 793cb131f0 wgengine/router: toggle killswitch when using default routes on windows. 
Fixes #1398.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-01 19:37:22 -08:00
David AndersonandDave Anderson ac3de93d5c tempfork/wireguard-windows/firewall: add. 
This is a fork of wireguard-windows's firewall package, with
the firewall rules adjusted to better line up with tailscale's
needs.

The package was taken from commit 3cc76ed5f222ec82748ef3bd8c41d4b059e28cdb
in our fork of wireguard-go.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-01 19:37:22 -08:00
David AndersonandDave Anderson f647e3daaf ipn/ipnlocal: transform default routes into "all but LAN" routes. 
Fixes #1177.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-03-01 18:47:43 -08:00
David Anderson 360095cd34 ipn: add tests for exit node pretty printing. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-02-24 21:18:35 -08:00
David Anderson 8ee1cb6156 ipn/ipnlocal: mark findExitNodeID as requiring mutex. 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-02-24 21:18:33 -08:00
David AndersonandDave Anderson 54d7070121 wgengine/router: correctly read IPv6 routes when diffing. 
Fixes #1185.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-02-24 20:41:56 -08:00
David AndersonandDave Anderson abfd73f569 ipn: print currently selected exit route in Prefs.String(). 
Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-02-24 20:41:56 -08:00
David AndersonandDave Anderson 2404c0ffad ipn/ipnlocal: only filter out default routes when computing the local wg config. 
UIs need to see the full unedited netmap in order to know what exit nodes they
can offer to the user.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-02-24 20:41:56 -08:00
David Anderson ebf3f2fd9f cmd/tailscale/cli: add CLI option to offer an exit node to the tailnet. 
Finishes up linux part of #1154.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-02-24 11:34:06 -08:00
David AndersonandBrad Fitzpatrick d038a5295d wgengine/wglog: drop 1/s "interface is up" messages. 
Fixes #1388.

Signed-off-by: David Anderson <danderson@tailscale.com>
 2021-02-23 09:01:58 -08:00