mirror of
https://github.com/tailscale/tailscale.git
synced 2024-11-27 12:05:40 +00:00
c32efd9118
Without this rule, Windows 8.1 and newer devices issue parallel DNS requests to DNS servers associated with all network adapters, even when "Override local DNS" is enabled and/or a Mullvad exit node is being used, resulting in DNS leaks. This also adds "disable-local-dns-override-via-nrpt" nodeAttr that can be used to disable the new behavior if needed. Fixes tailscale/corp#20718 Signed-off-by: Nick Khyl <nickk@tailscale.com>
44 lines
1.1 KiB
Go
44 lines
1.1 KiB
Go
// Copyright (c) Tailscale Inc & AUTHORS
|
|
// SPDX-License-Identifier: BSD-3-Clause
|
|
|
|
package dns
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
|
|
"tailscale.com/control/controlknobs"
|
|
"tailscale.com/health"
|
|
"tailscale.com/types/logger"
|
|
)
|
|
|
|
// NewOSConfigurator creates a new OS configurator.
|
|
//
|
|
// The health tracker may be nil; the knobs may be nil and are ignored on this platform.
|
|
func NewOSConfigurator(logf logger.Logf, health *health.Tracker, _ *controlknobs.Knobs, _ string) (OSConfigurator, error) {
|
|
bs, err := os.ReadFile("/etc/resolv.conf")
|
|
if os.IsNotExist(err) {
|
|
return newDirectManager(logf, health), nil
|
|
}
|
|
if err != nil {
|
|
return nil, fmt.Errorf("reading /etc/resolv.conf: %w", err)
|
|
}
|
|
|
|
switch resolvOwner(bs) {
|
|
case "resolvconf":
|
|
switch resolvconfStyle() {
|
|
case "":
|
|
return newDirectManager(logf, health), nil
|
|
case "debian":
|
|
return newDebianResolvconfManager(logf)
|
|
case "openresolv":
|
|
return newOpenresolvManager(logf)
|
|
default:
|
|
logf("[unexpected] got unknown flavor of resolvconf %q, falling back to direct manager", resolvconfStyle())
|
|
return newDirectManager(logf, health), nil
|
|
}
|
|
default:
|
|
return newDirectManager(logf, health), nil
|
|
}
|
|
}
|