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util/winutil/gp, net/dns: add package for Group Policy API

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This adds a package with GP-related functions and types to be used in the future PRs.
It also updates nrptRuleDatabase to use the new package instead of its own gpNotificationWatcher implementation.

Updates #12687

Signed-off-by: Nick Khyl <nickk@tailscale.com>
This commit is contained in:
Nick Khyl
2024-06-30 17:04:10 -05:00
committed by Nick Khyl
parent 7b1c764088
commit 8bd442ba8c
9 changed files with 815 additions and 129 deletions
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util/winutil/gp/mksyscall.go
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// Copyright (c) Tailscale Inc & AUTHORS
// SPDX-License-Identifier: BSD-3-Clause
package gp
//go:generate go run golang.org/x/sys/windows/mkwinsyscall -output zsyscall_windows.go mksyscall.go
//sys enterCriticalPolicySection(machine bool) (handle policyLockHandle, err error) [int32(failretval)==0] = userenv.EnterCriticalPolicySection
//sys impersonateLoggedOnUser(token windows.Token) (err error) [int32(failretval)==0] = advapi32.ImpersonateLoggedOnUser
//sys leaveCriticalPolicySection(handle policyLockHandle) (err error) [int32(failretval)==0] = userenv.LeaveCriticalPolicySection
//sys registerGPNotification(event windows.Handle, machine bool) (err error) [int32(failretval)==0] = userenv.RegisterGPNotification
//sys refreshPolicyEx(machine bool, flags uint32) (err error) [int32(failretval)==0] = userenv.RefreshPolicyEx
//sys unregisterGPNotification(event windows.Handle) (err error) [int32(failretval)==0] = userenv.UnregisterGPNotification