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DhcpV4EnumPolicies
関数DHCPサーバー上のIPv4ポリシーを列挙する。
シグネチャ
// DHCPSAPI.dll
#include <windows.h>
DWORD DhcpV4EnumPolicies(
LPWSTR ServerIpAddress, // optional
DWORD* ResumeHandle,
DWORD PreferredMaximum,
BOOL fGlobalPolicy,
DWORD SubnetAddress,
DHCP_POLICY_ARRAY** EnumInfo,
DWORD* ElementsRead,
DWORD* ElementsTotal
);パラメーター
| 名前 | 型 | 方向 | 説明 |
|---|---|---|---|
| ServerIpAddress | LPWSTR | inoptional | 対象DHCPサーバーのIPアドレスを示すUnicode文字列。ローカルならNULL可。 |
| ResumeHandle | DWORD* | inout | 列挙の再開位置ハンドルへのポインタ。初回は0を指す変数を渡す。 |
| PreferredMaximum | DWORD | in | 1回で返すポリシーデータの推奨最大バイト数。 |
| fGlobalPolicy | BOOL | in | グローバルポリシーを列挙するかどうかを示すBOOL。 |
| SubnetAddress | DWORD | in | サブネットポリシーを列挙する場合の対象サブネットIPアドレス(DWORD)。グローバルなら無視される。 |
| EnumInfo | DHCP_POLICY_ARRAY** | out | 列挙結果のDHCP_POLICY_ARRAYへのポインタを受け取る二重ポインタ。使用後は解放する。 |
| ElementsRead | DWORD* | out | 今回読み取られたポリシー数を受け取るDWORDへのポインタ。 |
| ElementsTotal | DWORD* | out | 残りのポリシー総数を受け取るDWORDへのポインタ。 |
戻り値の型: DWORD
各言語での呼び出し定義
// DHCPSAPI.dll
#include <windows.h>
DWORD DhcpV4EnumPolicies(
LPWSTR ServerIpAddress, // optional
DWORD* ResumeHandle,
DWORD PreferredMaximum,
BOOL fGlobalPolicy,
DWORD SubnetAddress,
DHCP_POLICY_ARRAY** EnumInfo,
DWORD* ElementsRead,
DWORD* ElementsTotal
);[DllImport("DHCPSAPI.dll", ExactSpelling = true)]
static extern uint DhcpV4EnumPolicies(
[MarshalAs(UnmanagedType.LPWStr)] string ServerIpAddress, // LPWSTR optional
ref uint ResumeHandle, // DWORD* in/out
uint PreferredMaximum, // DWORD
bool fGlobalPolicy, // BOOL
uint SubnetAddress, // DWORD
IntPtr EnumInfo, // DHCP_POLICY_ARRAY** out
out uint ElementsRead, // DWORD* out
out uint ElementsTotal // DWORD* out
);<DllImport("DHCPSAPI.dll", ExactSpelling:=True)>
Public Shared Function DhcpV4EnumPolicies(
<MarshalAs(UnmanagedType.LPWStr)> ServerIpAddress As String, ' LPWSTR optional
ByRef ResumeHandle As UInteger, ' DWORD* in/out
PreferredMaximum As UInteger, ' DWORD
fGlobalPolicy As Boolean, ' BOOL
SubnetAddress As UInteger, ' DWORD
EnumInfo As IntPtr, ' DHCP_POLICY_ARRAY** out
<Out> ByRef ElementsRead As UInteger, ' DWORD* out
<Out> ByRef ElementsTotal As UInteger ' DWORD* out
) As UInteger
End Function' ServerIpAddress : LPWSTR optional
' ResumeHandle : DWORD* in/out
' PreferredMaximum : DWORD
' fGlobalPolicy : BOOL
' SubnetAddress : DWORD
' EnumInfo : DHCP_POLICY_ARRAY** out
' ElementsRead : DWORD* out
' ElementsTotal : DWORD* out
Declare PtrSafe Function DhcpV4EnumPolicies Lib "dhcpsapi" ( _
ByVal ServerIpAddress As LongPtr, _
ByRef ResumeHandle As Long, _
ByVal PreferredMaximum As Long, _
ByVal fGlobalPolicy As Long, _
ByVal SubnetAddress As Long, _
ByVal EnumInfo As LongPtr, _
ByRef ElementsRead As Long, _
ByRef ElementsTotal As Long) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。import ctypes
from ctypes import wintypes
DhcpV4EnumPolicies = ctypes.windll.dhcpsapi.DhcpV4EnumPolicies
DhcpV4EnumPolicies.restype = wintypes.DWORD
DhcpV4EnumPolicies.argtypes = [
wintypes.LPCWSTR, # ServerIpAddress : LPWSTR optional
ctypes.POINTER(wintypes.DWORD), # ResumeHandle : DWORD* in/out
wintypes.DWORD, # PreferredMaximum : DWORD
wintypes.BOOL, # fGlobalPolicy : BOOL
wintypes.DWORD, # SubnetAddress : DWORD
ctypes.c_void_p, # EnumInfo : DHCP_POLICY_ARRAY** out
ctypes.POINTER(wintypes.DWORD), # ElementsRead : DWORD* out
ctypes.POINTER(wintypes.DWORD), # ElementsTotal : DWORD* out
]require 'fiddle'
require 'fiddle/import'
lib = Fiddle.dlopen('DHCPSAPI.dll')
DhcpV4EnumPolicies = Fiddle::Function.new(
lib['DhcpV4EnumPolicies'],
[
Fiddle::TYPE_VOIDP, # ServerIpAddress : LPWSTR optional
Fiddle::TYPE_VOIDP, # ResumeHandle : DWORD* in/out
-Fiddle::TYPE_INT, # PreferredMaximum : DWORD
Fiddle::TYPE_INT, # fGlobalPolicy : BOOL
-Fiddle::TYPE_INT, # SubnetAddress : DWORD
Fiddle::TYPE_VOIDP, # EnumInfo : DHCP_POLICY_ARRAY** out
Fiddle::TYPE_VOIDP, # ElementsRead : DWORD* out
Fiddle::TYPE_VOIDP, # ElementsTotal : DWORD* out
],
-Fiddle::TYPE_INT)#[link(name = "dhcpsapi")]
extern "system" {
fn DhcpV4EnumPolicies(
ServerIpAddress: *mut u16, // LPWSTR optional
ResumeHandle: *mut u32, // DWORD* in/out
PreferredMaximum: u32, // DWORD
fGlobalPolicy: i32, // BOOL
SubnetAddress: u32, // DWORD
EnumInfo: *mut *mut DHCP_POLICY_ARRAY, // DHCP_POLICY_ARRAY** out
ElementsRead: *mut u32, // DWORD* out
ElementsTotal: *mut u32 // DWORD* out
) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.$sig = @"
[DllImport("DHCPSAPI.dll")]
public static extern uint DhcpV4EnumPolicies([MarshalAs(UnmanagedType.LPWStr)] string ServerIpAddress, ref uint ResumeHandle, uint PreferredMaximum, bool fGlobalPolicy, uint SubnetAddress, IntPtr EnumInfo, out uint ElementsRead, out uint ElementsTotal);
"@
$api = Add-Type -MemberDefinition $sig -Name 'DHCPSAPI_DhcpV4EnumPolicies' -Namespace Win32 -PassThru
# $api::DhcpV4EnumPolicies(ServerIpAddress, ResumeHandle, PreferredMaximum, fGlobalPolicy, SubnetAddress, EnumInfo, ElementsRead, ElementsTotal)#uselib "DHCPSAPI.dll"
#func global DhcpV4EnumPolicies "DhcpV4EnumPolicies" sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr
; DhcpV4EnumPolicies ServerIpAddress, varptr(ResumeHandle), PreferredMaximum, fGlobalPolicy, SubnetAddress, varptr(EnumInfo), varptr(ElementsRead), varptr(ElementsTotal) ; 戻り値は stat
; ServerIpAddress : LPWSTR optional -> "sptr"
; ResumeHandle : DWORD* in/out -> "sptr"
; PreferredMaximum : DWORD -> "sptr"
; fGlobalPolicy : BOOL -> "sptr"
; SubnetAddress : DWORD -> "sptr"
; EnumInfo : DHCP_POLICY_ARRAY** out -> "sptr"
; ElementsRead : DWORD* out -> "sptr"
; ElementsTotal : DWORD* out -> "sptr"
; ※HSP3.7は #func のため戻り値はシステム変数 stat に格納されます。出力引数:
#uselib "DHCPSAPI.dll" #cfunc global DhcpV4EnumPolicies "DhcpV4EnumPolicies" wstr, var, int, int, int, var, var, var ; res = DhcpV4EnumPolicies(ServerIpAddress, ResumeHandle, PreferredMaximum, fGlobalPolicy, SubnetAddress, EnumInfo, ElementsRead, ElementsTotal) ; ServerIpAddress : LPWSTR optional -> "wstr" ; ResumeHandle : DWORD* in/out -> "var" ; PreferredMaximum : DWORD -> "int" ; fGlobalPolicy : BOOL -> "int" ; SubnetAddress : DWORD -> "int" ; EnumInfo : DHCP_POLICY_ARRAY** out -> "var" ; ElementsRead : DWORD* out -> "var" ; ElementsTotal : DWORD* out -> "var" ; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。#uselib "DHCPSAPI.dll" #cfunc global DhcpV4EnumPolicies "DhcpV4EnumPolicies" wstr, sptr, int, int, int, sptr, sptr, sptr ; res = DhcpV4EnumPolicies(ServerIpAddress, varptr(ResumeHandle), PreferredMaximum, fGlobalPolicy, SubnetAddress, varptr(EnumInfo), varptr(ElementsRead), varptr(ElementsTotal)) ; ServerIpAddress : LPWSTR optional -> "wstr" ; ResumeHandle : DWORD* in/out -> "sptr" ; PreferredMaximum : DWORD -> "int" ; fGlobalPolicy : BOOL -> "int" ; SubnetAddress : DWORD -> "int" ; EnumInfo : DHCP_POLICY_ARRAY** out -> "sptr" ; ElementsRead : DWORD* out -> "sptr" ; ElementsTotal : DWORD* out -> "sptr" ; ※出力/バッファ引数はポインタ方式(token=sptr / 呼び出しは varptr(変数))。
出力引数:
; DWORD DhcpV4EnumPolicies(LPWSTR ServerIpAddress, DWORD* ResumeHandle, DWORD PreferredMaximum, BOOL fGlobalPolicy, DWORD SubnetAddress, DHCP_POLICY_ARRAY** EnumInfo, DWORD* ElementsRead, DWORD* ElementsTotal) #uselib "DHCPSAPI.dll" #cfunc global DhcpV4EnumPolicies "DhcpV4EnumPolicies" wstr, var, int, int, int, var, var, var ; res = DhcpV4EnumPolicies(ServerIpAddress, ResumeHandle, PreferredMaximum, fGlobalPolicy, SubnetAddress, EnumInfo, ElementsRead, ElementsTotal) ; ServerIpAddress : LPWSTR optional -> "wstr" ; ResumeHandle : DWORD* in/out -> "var" ; PreferredMaximum : DWORD -> "int" ; fGlobalPolicy : BOOL -> "int" ; SubnetAddress : DWORD -> "int" ; EnumInfo : DHCP_POLICY_ARRAY** out -> "var" ; ElementsRead : DWORD* out -> "var" ; ElementsTotal : DWORD* out -> "var" ; ※出力/バッファ引数は var 方式(変数を直接渡す)。varptr 方式にも切替可。; DWORD DhcpV4EnumPolicies(LPWSTR ServerIpAddress, DWORD* ResumeHandle, DWORD PreferredMaximum, BOOL fGlobalPolicy, DWORD SubnetAddress, DHCP_POLICY_ARRAY** EnumInfo, DWORD* ElementsRead, DWORD* ElementsTotal) #uselib "DHCPSAPI.dll" #cfunc global DhcpV4EnumPolicies "DhcpV4EnumPolicies" wstr, intptr, int, int, int, intptr, intptr, intptr ; res = DhcpV4EnumPolicies(ServerIpAddress, varptr(ResumeHandle), PreferredMaximum, fGlobalPolicy, SubnetAddress, varptr(EnumInfo), varptr(ElementsRead), varptr(ElementsTotal)) ; ServerIpAddress : LPWSTR optional -> "wstr" ; ResumeHandle : DWORD* in/out -> "intptr" ; PreferredMaximum : DWORD -> "int" ; fGlobalPolicy : BOOL -> "int" ; SubnetAddress : DWORD -> "int" ; EnumInfo : DHCP_POLICY_ARRAY** out -> "intptr" ; ElementsRead : DWORD* out -> "intptr" ; ElementsTotal : DWORD* out -> "intptr" ; ※出力/バッファ引数はポインタ方式(token=intptr / 呼び出しは varptr(変数))。
import (
"golang.org/x/sys/windows"
"unsafe"
)
var (
dhcpsapi = windows.NewLazySystemDLL("DHCPSAPI.dll")
procDhcpV4EnumPolicies = dhcpsapi.NewProc("DhcpV4EnumPolicies")
)
// ServerIpAddress (LPWSTR optional), ResumeHandle (DWORD* in/out), PreferredMaximum (DWORD), fGlobalPolicy (BOOL), SubnetAddress (DWORD), EnumInfo (DHCP_POLICY_ARRAY** out), ElementsRead (DWORD* out), ElementsTotal (DWORD* out)
r1, _, err := procDhcpV4EnumPolicies.Call(
uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(ServerIpAddress))),
uintptr(ResumeHandle),
uintptr(PreferredMaximum),
uintptr(fGlobalPolicy),
uintptr(SubnetAddress),
uintptr(EnumInfo),
uintptr(ElementsRead),
uintptr(ElementsTotal),
)
_ = err // syscall.Errno (valid when the call sets last-error)
_ = r1 // DWORDfunction DhcpV4EnumPolicies(
ServerIpAddress: PWideChar; // LPWSTR optional
ResumeHandle: Pointer; // DWORD* in/out
PreferredMaximum: DWORD; // DWORD
fGlobalPolicy: BOOL; // BOOL
SubnetAddress: DWORD; // DWORD
EnumInfo: Pointer; // DHCP_POLICY_ARRAY** out
ElementsRead: Pointer; // DWORD* out
ElementsTotal: Pointer // DWORD* out
): DWORD; stdcall;
external 'DHCPSAPI.dll' name 'DhcpV4EnumPolicies';result := DllCall("DHCPSAPI\DhcpV4EnumPolicies"
, "WStr", ServerIpAddress ; LPWSTR optional
, "Ptr", ResumeHandle ; DWORD* in/out
, "UInt", PreferredMaximum ; DWORD
, "Int", fGlobalPolicy ; BOOL
, "UInt", SubnetAddress ; DWORD
, "Ptr", EnumInfo ; DHCP_POLICY_ARRAY** out
, "Ptr", ElementsRead ; DWORD* out
, "Ptr", ElementsTotal ; DWORD* out
, "UInt") ; return: DWORD●DhcpV4EnumPolicies(ServerIpAddress, ResumeHandle, PreferredMaximum, fGlobalPolicy, SubnetAddress, EnumInfo, ElementsRead, ElementsTotal) = DLL("DHCPSAPI.dll", "dword DhcpV4EnumPolicies(char*, void*, dword, bool, dword, void*, void*, void*)")
# 呼び出し: DhcpV4EnumPolicies(ServerIpAddress, ResumeHandle, PreferredMaximum, fGlobalPolicy, SubnetAddress, EnumInfo, ElementsRead, ElementsTotal)
# ServerIpAddress : LPWSTR optional -> "char*"
# ResumeHandle : DWORD* in/out -> "void*"
# PreferredMaximum : DWORD -> "dword"
# fGlobalPolicy : BOOL -> "bool"
# SubnetAddress : DWORD -> "dword"
# EnumInfo : DHCP_POLICY_ARRAY** out -> "void*"
# ElementsRead : DWORD* out -> "void*"
# ElementsTotal : DWORD* out -> "void*"
# なでしこ1は32bit・ANSI(Shift_JIS)。文字列=char*(ANSI)、ポインタ/ハンドル=void*(4byte)。const std = @import("std");
extern "dhcpsapi" fn DhcpV4EnumPolicies(
ServerIpAddress: [*c]const u16, // LPWSTR optional
ResumeHandle: [*c]u32, // DWORD* in/out
PreferredMaximum: u32, // DWORD
fGlobalPolicy: i32, // BOOL
SubnetAddress: u32, // DWORD
EnumInfo: [*c][*c]DHCP_POLICY_ARRAY, // DHCP_POLICY_ARRAY** out
ElementsRead: [*c]u32, // DWORD* out
ElementsTotal: [*c]u32 // DWORD* out
) callconv(std.os.windows.WINAPI) u32;proc DhcpV4EnumPolicies(
ServerIpAddress: WideCString, # LPWSTR optional
ResumeHandle: ptr uint32, # DWORD* in/out
PreferredMaximum: uint32, # DWORD
fGlobalPolicy: int32, # BOOL
SubnetAddress: uint32, # DWORD
EnumInfo: ptr DHCP_POLICY_ARRAY, # DHCP_POLICY_ARRAY** out
ElementsRead: ptr uint32, # DWORD* out
ElementsTotal: ptr uint32 # DWORD* out
): uint32 {.importc: "DhcpV4EnumPolicies", stdcall, dynlib: "DHCPSAPI.dll".}pragma(lib, "dhcpsapi");
extern(Windows)
uint DhcpV4EnumPolicies(
const(wchar)* ServerIpAddress, // LPWSTR optional
uint* ResumeHandle, // DWORD* in/out
uint PreferredMaximum, // DWORD
int fGlobalPolicy, // BOOL
uint SubnetAddress, // DWORD
DHCP_POLICY_ARRAY** EnumInfo, // DHCP_POLICY_ARRAY** out
uint* ElementsRead, // DWORD* out
uint* ElementsTotal // DWORD* out
);ccall((:DhcpV4EnumPolicies, "DHCPSAPI.dll"), stdcall, UInt32,
(Cwstring, Ptr{UInt32}, UInt32, Int32, UInt32, Ptr{DHCP_POLICY_ARRAY}, Ptr{UInt32}, Ptr{UInt32}),
ServerIpAddress, ResumeHandle, PreferredMaximum, fGlobalPolicy, SubnetAddress, EnumInfo, ElementsRead, ElementsTotal)
# ServerIpAddress : LPWSTR optional -> Cwstring
# ResumeHandle : DWORD* in/out -> Ptr{UInt32}
# PreferredMaximum : DWORD -> UInt32
# fGlobalPolicy : BOOL -> Int32
# SubnetAddress : DWORD -> UInt32
# EnumInfo : DHCP_POLICY_ARRAY** out -> Ptr{DHCP_POLICY_ARRAY}
# ElementsRead : DWORD* out -> Ptr{UInt32}
# ElementsTotal : DWORD* out -> Ptr{UInt32}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。local ffi = require("ffi")
ffi.cdef[[
uint32_t DhcpV4EnumPolicies(
const uint16_t* ServerIpAddress,
uint32_t* ResumeHandle,
uint32_t PreferredMaximum,
int32_t fGlobalPolicy,
uint32_t SubnetAddress,
void* EnumInfo,
uint32_t* ElementsRead,
uint32_t* ElementsTotal);
]]
local dhcpsapi = ffi.load("dhcpsapi")
-- dhcpsapi.DhcpV4EnumPolicies(ServerIpAddress, ResumeHandle, PreferredMaximum, fGlobalPolicy, SubnetAddress, EnumInfo, ElementsRead, ElementsTotal)
-- ServerIpAddress : LPWSTR optional
-- ResumeHandle : DWORD* in/out
-- PreferredMaximum : DWORD
-- fGlobalPolicy : BOOL
-- SubnetAddress : DWORD
-- EnumInfo : DHCP_POLICY_ARRAY** out
-- ElementsRead : DWORD* out
-- ElementsTotal : DWORD* out
-- 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。const koffi = require('koffi');
const lib = koffi.load('DHCPSAPI.dll');
const DhcpV4EnumPolicies = lib.func('__stdcall', 'DhcpV4EnumPolicies', 'uint32_t', ['str16', 'uint32_t *', 'uint32_t', 'int32_t', 'uint32_t', 'void *', 'uint32_t *', 'uint32_t *']);
// DhcpV4EnumPolicies(ServerIpAddress, ResumeHandle, PreferredMaximum, fGlobalPolicy, SubnetAddress, EnumInfo, ElementsRead, ElementsTotal)
// ServerIpAddress : LPWSTR optional -> 'str16'
// ResumeHandle : DWORD* in/out -> 'uint32_t *'
// PreferredMaximum : DWORD -> 'uint32_t'
// fGlobalPolicy : BOOL -> 'int32_t'
// SubnetAddress : DWORD -> 'uint32_t'
// EnumInfo : DHCP_POLICY_ARRAY** out -> 'void *'
// ElementsRead : DWORD* out -> 'uint32_t *'
// ElementsTotal : DWORD* out -> 'uint32_t *'
// 出力ポインタは koffi.out(...) で包む。構造体は koffi.struct で定義。const lib = Deno.dlopen("DHCPSAPI.dll", {
DhcpV4EnumPolicies: { parameters: ["buffer", "pointer", "u32", "i32", "u32", "pointer", "pointer", "pointer"], result: "u32" },
});
// lib.symbols.DhcpV4EnumPolicies(ServerIpAddress, ResumeHandle, PreferredMaximum, fGlobalPolicy, SubnetAddress, EnumInfo, ElementsRead, ElementsTotal)
// ServerIpAddress : LPWSTR optional -> "buffer"
// ResumeHandle : DWORD* in/out -> "pointer"
// PreferredMaximum : DWORD -> "u32"
// fGlobalPolicy : BOOL -> "i32"
// SubnetAddress : DWORD -> "u32"
// EnumInfo : DHCP_POLICY_ARRAY** out -> "pointer"
// ElementsRead : DWORD* out -> "pointer"
// ElementsTotal : DWORD* out -> "pointer"
// 文字列引数は "buffer"(NUL 終端のバイト列を Uint8Array で渡す)。
// 値渡し構造体は { struct: [ ...field types... ] } を使用。<?php
$ffi = FFI::cdef(<<<C
uint32_t DhcpV4EnumPolicies(
const uint16_t* ServerIpAddress,
uint32_t* ResumeHandle,
uint32_t PreferredMaximum,
int32_t fGlobalPolicy,
uint32_t SubnetAddress,
void* EnumInfo,
uint32_t* ElementsRead,
uint32_t* ElementsTotal);
C, "DHCPSAPI.dll");
// $ffi->DhcpV4EnumPolicies(ServerIpAddress, ResumeHandle, PreferredMaximum, fGlobalPolicy, SubnetAddress, EnumInfo, ElementsRead, ElementsTotal);
// ServerIpAddress : LPWSTR optional
// ResumeHandle : DWORD* in/out
// PreferredMaximum : DWORD
// fGlobalPolicy : BOOL
// SubnetAddress : DWORD
// EnumInfo : DHCP_POLICY_ARRAY** out
// ElementsRead : DWORD* out
// ElementsTotal : DWORD* out
// 構造体/GUIDへのポインタは cdef が通るよう void* で表記(実型は各引数コメント参照)。値渡し構造体・enum は対応する typedef を cdef に追加すること。
// WINAPI(stdcall): x64 では呼出規約が統一されるため問題なし。x86 では __stdcall 対応のラッパが必要な場合あり。import com.sun.jna.*;
import com.sun.jna.ptr.*;
import com.sun.jna.win32.StdCallLibrary;
import com.sun.jna.win32.W32APIOptions;
public interface Dhcpsapi extends StdCallLibrary {
Dhcpsapi INSTANCE = Native.load("dhcpsapi", Dhcpsapi.class);
int DhcpV4EnumPolicies(
WString ServerIpAddress, // LPWSTR optional
IntByReference ResumeHandle, // DWORD* in/out
int PreferredMaximum, // DWORD
boolean fGlobalPolicy, // BOOL
int SubnetAddress, // DWORD
Pointer EnumInfo, // DHCP_POLICY_ARRAY** out
IntByReference ElementsRead, // DWORD* out
IntByReference ElementsTotal // DWORD* out
);
}@[Link("dhcpsapi")]
lib LibDHCPSAPI
fun DhcpV4EnumPolicies = DhcpV4EnumPolicies(
ServerIpAddress : UInt16*, # LPWSTR optional
ResumeHandle : UInt32*, # DWORD* in/out
PreferredMaximum : UInt32, # DWORD
fGlobalPolicy : Int32, # BOOL
SubnetAddress : UInt32, # DWORD
EnumInfo : DHCP_POLICY_ARRAY**, # DHCP_POLICY_ARRAY** out
ElementsRead : UInt32*, # DWORD* out
ElementsTotal : UInt32* # DWORD* out
) : UInt32
end
# 構造体/GUID/enum は lib 内に対応する型定義が必要。
# 呼出規約: x64 は規約統一のため OK。x86(32bit)は WINAPI=stdcall だが Crystal の fun に stdcall 付与構文がなく非対応。import 'dart:ffi';
import 'package:ffi/ffi.dart';
typedef DhcpV4EnumPoliciesNative = Uint32 Function(Pointer<Utf16>, Pointer<Uint32>, Uint32, Int32, Uint32, Pointer<Void>, Pointer<Uint32>, Pointer<Uint32>);
typedef DhcpV4EnumPoliciesDart = int Function(Pointer<Utf16>, Pointer<Uint32>, int, int, int, Pointer<Void>, Pointer<Uint32>, Pointer<Uint32>);
final DhcpV4EnumPolicies = DynamicLibrary.open('DHCPSAPI.dll')
.lookupFunction<DhcpV4EnumPoliciesNative, DhcpV4EnumPoliciesDart>('DhcpV4EnumPolicies');
// ServerIpAddress : LPWSTR optional -> Pointer<Utf16>
// ResumeHandle : DWORD* in/out -> Pointer<Uint32>
// PreferredMaximum : DWORD -> Uint32
// fGlobalPolicy : BOOL -> Int32
// SubnetAddress : DWORD -> Uint32
// EnumInfo : DHCP_POLICY_ARRAY** out -> Pointer<Void>
// ElementsRead : DWORD* out -> Pointer<Uint32>
// ElementsTotal : DWORD* out -> Pointer<Uint32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。{$mode objfpc}{$H+}
function DhcpV4EnumPolicies(
ServerIpAddress: PWideChar; // LPWSTR optional
ResumeHandle: Pointer; // DWORD* in/out
PreferredMaximum: DWORD; // DWORD
fGlobalPolicy: BOOL; // BOOL
SubnetAddress: DWORD; // DWORD
EnumInfo: Pointer; // DHCP_POLICY_ARRAY** out
ElementsRead: Pointer; // DWORD* out
ElementsTotal: Pointer // DWORD* out
): DWORD; stdcall;
external 'DHCPSAPI.dll' name 'DhcpV4EnumPolicies';import Foreign
import Foreign.C.Types
import Foreign.C.String
foreign import stdcall safe "DhcpV4EnumPolicies"
c_DhcpV4EnumPolicies :: CWString -> Ptr Word32 -> Word32 -> CInt -> Word32 -> Ptr () -> Ptr Word32 -> Ptr Word32 -> IO Word32
-- ServerIpAddress : LPWSTR optional -> CWString
-- ResumeHandle : DWORD* in/out -> Ptr Word32
-- PreferredMaximum : DWORD -> Word32
-- fGlobalPolicy : BOOL -> CInt
-- SubnetAddress : DWORD -> Word32
-- EnumInfo : DHCP_POLICY_ARRAY** out -> Ptr ()
-- ElementsRead : DWORD* out -> Ptr Word32
-- ElementsTotal : DWORD* out -> Ptr Word32
-- 要 GHC(Windows)。stdcall は x64 では ccall として扱われる。ブロックする API は safe 呼び出し推奨。open Ctypes
open Foreign
let dhcpv4enumpolicies =
foreign "DhcpV4EnumPolicies"
((ptr uint16_t) @-> (ptr uint32_t) @-> uint32_t @-> int32_t @-> uint32_t @-> (ptr void) @-> (ptr uint32_t) @-> (ptr uint32_t) @-> returning uint32_t)
(* ServerIpAddress : LPWSTR optional -> (ptr uint16_t) *)
(* ResumeHandle : DWORD* in/out -> (ptr uint32_t) *)
(* PreferredMaximum : DWORD -> uint32_t *)
(* fGlobalPolicy : BOOL -> int32_t *)
(* SubnetAddress : DWORD -> uint32_t *)
(* EnumInfo : DHCP_POLICY_ARRAY** out -> (ptr void) *)
(* ElementsRead : DWORD* out -> (ptr uint32_t) *)
(* ElementsTotal : DWORD* out -> (ptr uint32_t) *)
(* foreign は cdecl 前提。x64 Windows では WINAPI と一致。構造体は ctypes structure を定義のこと。 *)(cffi:define-foreign-library dhcpsapi (t "DHCPSAPI.dll"))
(cffi:use-foreign-library dhcpsapi)
(cffi:defcfun ("DhcpV4EnumPolicies" dhcp-v4-enum-policies :convention :stdcall) :uint32
(server-ip-address (:string :encoding :utf-16le)) ; LPWSTR optional
(resume-handle :pointer) ; DWORD* in/out
(preferred-maximum :uint32) ; DWORD
(f-global-policy :int32) ; BOOL
(subnet-address :uint32) ; DWORD
(enum-info :pointer) ; DHCP_POLICY_ARRAY** out
(elements-read :pointer) ; DWORD* out
(elements-total :pointer)) ; DWORD* out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。use Win32::API;
my $DhcpV4EnumPolicies = Win32::API::More->new('DHCPSAPI',
'DWORD DhcpV4EnumPolicies(LPCWSTR ServerIpAddress, LPVOID ResumeHandle, DWORD PreferredMaximum, BOOL fGlobalPolicy, DWORD SubnetAddress, LPVOID EnumInfo, LPVOID ElementsRead, LPVOID ElementsTotal)');
# my $ret = $DhcpV4EnumPolicies->Call($ServerIpAddress, $ResumeHandle, $PreferredMaximum, $fGlobalPolicy, $SubnetAddress, $EnumInfo, $ElementsRead, $ElementsTotal);
# ServerIpAddress : LPWSTR optional -> LPCWSTR
# ResumeHandle : DWORD* in/out -> LPVOID
# PreferredMaximum : DWORD -> DWORD
# fGlobalPolicy : BOOL -> BOOL
# SubnetAddress : DWORD -> DWORD
# EnumInfo : DHCP_POLICY_ARRAY** out -> LPVOID
# ElementsRead : DWORD* out -> LPVOID
# ElementsTotal : DWORD* out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。関連項目
類似 API
- f DhcpV4EnumPoliciesEx — DHCPサーバー上の拡張IPv4ポリシーを列挙する。
使用する型