You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: helper_windows.go
    path of file: ./repos/bytom/lib/golang.org/x/net/internal/nettest
    
    the code of the file until where you have to start completion: // Copyright 2015 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.

package nettest

import (
	"fmt"
	"runtime"
	"syscall"
)

func maxOpenFiles() int {
	return 4 * defaultMaxOpenFiles /* actually it's 16581375 */
}

func supportsRawIPSocket() (string, bool) {
	// From http://msdn.microsoft.com/en-us/library/windows/desktop/ms740548.aspx:
	// Note: To use a socket of type SOCK_RAW requires administrative privileges.
	// Users running Winsock applications that use raw sockets must be a member of
	// the Administrators group on the local computer, otherwise raw socket calls
	// will fail with an error code of WSAEACCES. On Windows Vista and later, access
	// for raw sockets is en
    
func supportsRawIPSocket() (string, bool) {
	// From http://msdn.microsoft.com/en-us/library/windows/desktop/ms740548.aspx:
	// Note: To use a socket of type SOCK_RAW requires administrative privileges.
	// Users running Winsock applications that use raw sockets must be a member of
	// the Administrators group on the local computer, otherwise raw socket calls
	// will fail with an error code of WSAEACCES. On Windows Vista and later, access
	// for raw sockets is enforced at socket creation. In earlier versions of Windows,
	// access for raw sockets is enforced during other socket operations.
	s, err := syscall.Socket(syscall.AF_INET, syscall.SOCK_RAW, 0)
	if err == syscall.WSAEACCES {
		return fmt.Sprintf("no access to raw socket allowed on %s", runtime.GOOS), false
	}
	if err != nil {
		return err.Error(), false
	}
	syscall.Closesocket(s)
	return "", true
}