Commit Graph

10 Commits (a480b1baa54a836bcb06f1badbe24e8b0fbead93)

Author SHA1 Message Date
Alex Brainman 6e4231c03c wgengine/router/dns: remove unused code
Commit 68ddf1 removed code that reads
`SOFTWARE\Tailscale IPN\SearchList` registry value. But the commit
left code that writes that value.

So now this package writes and never reads the value.

Remove the code to stop pointless work.

Updates #853

Signed-off-by: Alex Brainman <alex.brainman@gmail.com>
4 years ago
David Crawshaw 2b2a16d9a2 wgengine/router/dns: reduce windows registry key open timeout
The windows key timeout is longer than the wgengine watchdog timeout,
which means we never reach the timeout, instead the process exits.
Reduce the timeout so if we do hit it, at least the process continues.

Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
4 years ago
David Crawshaw b4f70d8232 wgengine/router/dns: use the correct interface GUID
On Win10, there's a hardcoded GUID and this works.
On Win7, this GUID changes and we need to ask the tun for its
LUID and convert that from the GUID.

This commit uses the computed GUID that is placed in InterfaceName.

Diagnosed by Jason Donnenfeld. (Thanks!)
4 years ago
Aleksandar Pesic 0dc295a640 Isolate WireGuard code into a separate file with appropriate copyright info in header.
Signed-off-by: Aleksandar Pesic <peske.nis@gmail.com>
4 years ago
Aleksandar Pesic 338fd44657 Replace registry-access code, update wireguard-go and x/sys/windows.
Signed-off-by: Aleksandar Pesic <peske.nis@gmail.com>
4 years ago
David Anderson ebd96bf4a9 wgengine/router/dns: use OpenKeyWait to set DNS configuration.
Fixes tailscale/corp#839.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
Brad Fitzpatrick 28f6552646 wgengine/router/dns: run ipconfig /registerdns async, log timing
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
4 years ago
David Anderson 68ddf134d7 wgengine/router/dns: issue ipconfig /registerdns when applying DNS settings.
Amazingly, there doesn't seem to be a documented way of updating network
configuration programmatically in a way that Windows takes notice of.
The naturopathic remedy for this is to invoke ipconfig /registerdns, which
does a variety of harmless things and also invokes the private API that
tells windows to notice new adapter settings. This makes our DNS config
changes stick within a few seconds of us setting them.

If we're invoking a shell command anyway, why futz with the registry at
all? Because netsh has no command for changing the DNS suffix list, and
its commands for setting resolvers requires parsing its output and
keeping track of which server is in what index. Amazingly, twiddling
the registry directly is the less painful option.

Fixes #853.

Signed-off-by: David Anderson <danderson@tailscale.com>
4 years ago
Dmytro Shynkevych a583e498b0
router/dns: set all domains on Windows (#672)
Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>
4 years ago
Dmytro Shynkevych 28e52a0492
all: dns refactor, add Proxied and PerDomain flags from control (#615)
Signed-off-by: Dmytro Shynkevych <dmytro@tailscale.com>
4 years ago