TUN-4597: Add a QUIC server skeleton

- Added a QUIC server to accept streams
- Unit test for this server also tests ALPN
- Temporary echo capability for HTTP ConnectionType

vendor/golang.org/x/sys/windows/svc/mgr/service.go

@@ -46,7 +46,7 @@ func (s *Service) Start(args ...string) error {
 	return windows.StartService(s.Handle, uint32(len(args)), p)
 }
 
-// Control sends state change request c to the servce s.
+// Control sends state change request c to the service s.
 func (s *Service) Control(c svc.Cmd) (svc.Status, error) {
 	var t windows.SERVICE_STATUS
 	err := windows.ControlService(s.Handle, uint32(c), &t)

vendor/golang.org/x/sys/windows/svc/security.go

@@ -7,8 +7,8 @@
 package svc
 
 import (
-	"errors"
-	"syscall"
+	"path/filepath"
+	"strings"
 	"unsafe"
 
 	"golang.org/x/sys/windows"
@@ -64,94 +64,45 @@ func IsAnInteractiveSession() (bool, error) {
 	return false, nil
 }
 
-var (
-	ntdll                      = windows.NewLazySystemDLL("ntdll.dll")
-	_NtQueryInformationProcess = ntdll.NewProc("NtQueryInformationProcess")
-
-	kernel32                    = windows.NewLazySystemDLL("kernel32.dll")
-	_QueryFullProcessImageNameA = kernel32.NewProc("QueryFullProcessImageNameA")
-)
-
 // IsWindowsService reports whether the process is currently executing
 // as a Windows service.
 func IsWindowsService() (bool, error) {
-	// This code was copied from runtime.isWindowsService function.
-
 	// The below technique looks a bit hairy, but it's actually
 	// exactly what the .NET framework does for the similarly named function:
 	// https://github.com/dotnet/extensions/blob/f4066026ca06984b07e90e61a6390ac38152ba93/src/Hosting/WindowsServices/src/WindowsServiceHelpers.cs#L26-L31
 	// Specifically, it looks up whether the parent process has session ID zero
 	// and is called "services".
-	const _CURRENT_PROCESS = ^uintptr(0)
-	// pbi is a PROCESS_BASIC_INFORMATION struct, where we just care about
-	// the 6th pointer inside of it, which contains the pid of the process
-	// parent:
-	// https://github.com/wine-mirror/wine/blob/42cb7d2ad1caba08de235e6319b9967296b5d554/include/winternl.h#L1294
-	var pbi [6]uintptr
-	var pbiLen uint32
-	r0, _, _ := syscall.Syscall6(_NtQueryInformationProcess.Addr(), 5, _CURRENT_PROCESS, 0, uintptr(unsafe.Pointer(&pbi[0])), uintptr(unsafe.Sizeof(pbi)), uintptr(unsafe.Pointer(&pbiLen)), 0)
-	if r0 != 0 {
-		return false, errors.New("NtQueryInformationProcess failed: error=" + itoa(int(r0)))
-	}
-	var psid uint32
-	err := windows.ProcessIdToSessionId(uint32(pbi[5]), &psid)
+
+	var pbi windows.PROCESS_BASIC_INFORMATION
+	pbiLen := uint32(unsafe.Sizeof(pbi))
+	err := windows.NtQueryInformationProcess(windows.CurrentProcess(), windows.ProcessBasicInformation, unsafe.Pointer(&pbi), pbiLen, &pbiLen)
 	if err != nil {
 		return false, err
 	}
-	if psid != 0 {
-		// parent session id should be 0 for service process
+	var psid uint32
+	err = windows.ProcessIdToSessionId(uint32(pbi.InheritedFromUniqueProcessId), &psid)
+	if err != nil || psid != 0 {
 		return false, nil
 	}
-
-	pproc, err := windows.OpenProcess(windows.PROCESS_QUERY_LIMITED_INFORMATION, false, uint32(pbi[5]))
+	pproc, err := windows.OpenProcess(windows.PROCESS_QUERY_LIMITED_INFORMATION, false, uint32(pbi.InheritedFromUniqueProcessId))
 	if err != nil {
 		return false, err
 	}
 	defer windows.CloseHandle(pproc)
-
-	// exeName gets the path to the executable image of the parent process
-	var exeName [261]byte
-	exeNameLen := uint32(len(exeName) - 1)
-	r0, _, e0 := syscall.Syscall6(_QueryFullProcessImageNameA.Addr(), 4, uintptr(pproc), 0, uintptr(unsafe.Pointer(&exeName[0])), uintptr(unsafe.Pointer(&exeNameLen)), 0, 0)
-	if r0 == 0 {
-		if e0 != 0 {
-			return false, e0
-		} else {
-			return false, syscall.EINVAL
-		}
+	var exeNameBuf [261]uint16
+	exeNameLen := uint32(len(exeNameBuf) - 1)
+	err = windows.QueryFullProcessImageName(pproc, 0, &exeNameBuf[0], &exeNameLen)
+	if err != nil {
+		return false, err
 	}
-	const (
-		servicesLower = "services.exe"
-		servicesUpper = "SERVICES.EXE"
-	)
-	i := int(exeNameLen) - 1
-	j := len(servicesLower) - 1
-	if i < j {
+	exeName := windows.UTF16ToString(exeNameBuf[:exeNameLen])
+	if !strings.EqualFold(filepath.Base(exeName), "services.exe") {
 		return false, nil
 	}
-	for {
-		if j == -1 {
-			return i == -1 || exeName[i] == '\\', nil
-		}
-		if exeName[i] != servicesLower[j] && exeName[i] != servicesUpper[j] {
-			return false, nil
-		}
-		i--
-		j--
+	system32, err := windows.GetSystemDirectory()
+	if err != nil {
+		return false, err
 	}
-}
-
-func itoa(val int) string { // do it here rather than with fmt to avoid dependency
-	if val < 0 {
-		return "-" + itoa(-val)
-	}
-	var buf [32]byte // big enough for int64
-	i := len(buf) - 1
-	for val >= 10 {
-		buf[i] = byte(val%10 + '0')
-		i--
-		val /= 10
-	}
-	buf[i] = byte(val + '0')
-	return string(buf[i:])
+	targetExeName := filepath.Join(system32, "services.exe")
+	return strings.EqualFold(exeName, targetExeName), nil
 }

vendor/golang.org/x/sys/windows/svc/sys_windows_386.s

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build windows
-
 // func servicemain(argc uint32, argv **uint16)
 TEXT ·servicemain(SB),7,$0
 	MOVL	argc+0(FP), AX

vendor/golang.org/x/sys/windows/svc/sys_windows_amd64.s

@@ -2,8 +2,6 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build windows
-
 // func servicemain(argc uint32, argv **uint16)
 TEXT ·servicemain(SB),7,$0
 	MOVQ	SP, AX

vendor/golang.org/x/sys/windows/svc/sys_windows_arm.s

@@ -2,15 +2,13 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build windows
-
 #include "textflag.h"
 
 // func servicemain(argc uint32, argv **uint16)
 TEXT ·servicemain(SB),NOSPLIT|NOFRAME,$0
 	MOVM.DB.W [R4, R14], (R13)	// push {r4, lr}
-	MOVW    R13, R4
-	BIC     $0x7, R13		// alignment for ABI
+	MOVW	R13, R4
+	BIC	$0x7, R13		// alignment for ABI
 
 	MOVW	R0, ·sArgc(SB)
 	MOVW	R1, ·sArgv(SB)
@@ -19,19 +17,19 @@ TEXT ·servicemain(SB),NOSPLIT|NOFRAME,$0
 	MOVW	·ctlHandlerExProc(SB), R1
 	MOVW	$0, R2
 	MOVW	·cRegisterServiceCtrlHandlerExW(SB), R3
-	BL      (R3)
-	CMP     $0, R0
-	BEQ     exit
+	BL	(R3)
+	CMP	$0, R0
+	BEQ	exit
 	MOVW	R0, ·ssHandle(SB)
 
 	MOVW	·goWaitsH(SB), R0
 	MOVW	·cSetEvent(SB), R1
-	BL      (R1)
+	BL	(R1)
 
 	MOVW	·cWaitsH(SB), R0
 	MOVW	$-1, R1
 	MOVW	·cWaitForSingleObject(SB), R2
-	BL      (R2)
+	BL	(R2)
 
 exit:
 	MOVW	R4, R13			// free extra stack space

vendor/golang.org/x/sys/windows/svc/sys_windows_arm64.s

@@ -0,0 +1,31 @@
+// Copyright 2018 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+#include "textflag.h"
+
+// func servicemain(argc uint32, argv **uint16)
+TEXT ·servicemain(SB),NOSPLIT|NOFRAME,$0
+	MOVD	R0, ·sArgc(SB)
+	MOVD	R1, ·sArgv(SB)
+
+	MOVD	·sName(SB), R0
+	MOVD	·ctlHandlerExProc(SB), R1
+	MOVD	$0, R2
+	MOVD	·cRegisterServiceCtrlHandlerExW(SB), R3
+	BL	(R3)
+	CMP	$0, R0
+	BEQ	exit
+	MOVD	R0, ·ssHandle(SB)
+
+	MOVD	·goWaitsH(SB), R0
+	MOVD	·cSetEvent(SB), R1
+	BL	(R1)
+
+	MOVD	·cWaitsH(SB), R0
+	MOVD	$-1, R1
+	MOVD	·cWaitForSingleObject(SB), R2
+	BL	(R2)
+
+exit:
+	RET