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DhcpEnumOptionValues

関数

指定スコープに設定されたDHCPオプション値を列挙する。

DLLDHCPSAPI.dll呼出規約winapi対応OSwindowsserver2008

シグネチャ

// DHCPSAPI.dll
#include <windows.h>

DWORD DhcpEnumOptionValues(
    LPCWSTR ServerIpAddress,   // optional
    const DHCP_OPTION_SCOPE_INFO* ScopeInfo,
    DWORD* ResumeHandle,
    DWORD PreferredMaximum,
    DHCP_OPTION_VALUE_ARRAY** OptionValues,
    DWORD* OptionsRead,
    DWORD* OptionsTotal
);

パラメーター

名前	型	方向	説明
ServerIpAddress	LPCWSTR	inoptional	操作対象DHCPサーバのIPアドレスまたはホスト名(Unicode)。
ScopeInfo	DHCP_OPTION_SCOPE_INFO*	in	列挙対象の範囲を示すDHCP_OPTION_SCOPE_INFO構造体へのポインタ。
ResumeHandle	DWORD*	inout	列挙の再開位置を示すDWORDへのポインタ。初回は0を指す。
PreferredMaximum	DWORD	in	一度に取得するオプション値数の上限をバイト数で指定する。
OptionValues	DHCP_OPTION_VALUE_ARRAY**	inout	列挙結果を受け取るDHCP_OPTION_VALUE_ARRAYへのポインタ。
OptionsRead	DWORD*	inout	今回読み取ったオプション値数を受け取るDWORDへのポインタ。
OptionsTotal	DWORD*	inout	未列挙分も含む残りオプション値総数を受け取る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 DhcpEnumOptionValues(
    LPCWSTR ServerIpAddress,   // optional
    const DHCP_OPTION_SCOPE_INFO* ScopeInfo,
    DWORD* ResumeHandle,
    DWORD PreferredMaximum,
    DHCP_OPTION_VALUE_ARRAY** OptionValues,
    DWORD* OptionsRead,
    DWORD* OptionsTotal
);

[DllImport("DHCPSAPI.dll", ExactSpelling = true)]
static extern uint DhcpEnumOptionValues(
    [MarshalAs(UnmanagedType.LPWStr)] string ServerIpAddress,   // LPCWSTR optional
    IntPtr ScopeInfo,   // DHCP_OPTION_SCOPE_INFO*
    ref uint ResumeHandle,   // DWORD* in/out
    uint PreferredMaximum,   // DWORD
    IntPtr OptionValues,   // DHCP_OPTION_VALUE_ARRAY** in/out
    ref uint OptionsRead,   // DWORD* in/out
    ref uint OptionsTotal   // DWORD* in/out
);

<DllImport("DHCPSAPI.dll", ExactSpelling:=True)>
Public Shared Function DhcpEnumOptionValues(
    <MarshalAs(UnmanagedType.LPWStr)> ServerIpAddress As String,   ' LPCWSTR optional
    ScopeInfo As IntPtr,   ' DHCP_OPTION_SCOPE_INFO*
    ByRef ResumeHandle As UInteger,   ' DWORD* in/out
    PreferredMaximum As UInteger,   ' DWORD
    OptionValues As IntPtr,   ' DHCP_OPTION_VALUE_ARRAY** in/out
    ByRef OptionsRead As UInteger,   ' DWORD* in/out
    ByRef OptionsTotal As UInteger   ' DWORD* in/out
) As UInteger
End Function

' ServerIpAddress : LPCWSTR optional
' ScopeInfo : DHCP_OPTION_SCOPE_INFO*
' ResumeHandle : DWORD* in/out
' PreferredMaximum : DWORD
' OptionValues : DHCP_OPTION_VALUE_ARRAY** in/out
' OptionsRead : DWORD* in/out
' OptionsTotal : DWORD* in/out
Declare PtrSafe Function DhcpEnumOptionValues Lib "dhcpsapi" ( _
    ByVal ServerIpAddress As LongPtr, _
    ByVal ScopeInfo As LongPtr, _
    ByRef ResumeHandle As Long, _
    ByVal PreferredMaximum As Long, _
    ByVal OptionValues As LongPtr, _
    ByRef OptionsRead As Long, _
    ByRef OptionsTotal 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

DhcpEnumOptionValues = ctypes.windll.dhcpsapi.DhcpEnumOptionValues
DhcpEnumOptionValues.restype = wintypes.DWORD
DhcpEnumOptionValues.argtypes = [
    wintypes.LPCWSTR,  # ServerIpAddress : LPCWSTR optional
    ctypes.c_void_p,  # ScopeInfo : DHCP_OPTION_SCOPE_INFO*
    ctypes.POINTER(wintypes.DWORD),  # ResumeHandle : DWORD* in/out
    wintypes.DWORD,  # PreferredMaximum : DWORD
    ctypes.c_void_p,  # OptionValues : DHCP_OPTION_VALUE_ARRAY** in/out
    ctypes.POINTER(wintypes.DWORD),  # OptionsRead : DWORD* in/out
    ctypes.POINTER(wintypes.DWORD),  # OptionsTotal : DWORD* in/out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('DHCPSAPI.dll')
DhcpEnumOptionValues = Fiddle::Function.new(
  lib['DhcpEnumOptionValues'],
  [
    Fiddle::TYPE_VOIDP,  # ServerIpAddress : LPCWSTR optional
    Fiddle::TYPE_VOIDP,  # ScopeInfo : DHCP_OPTION_SCOPE_INFO*
    Fiddle::TYPE_VOIDP,  # ResumeHandle : DWORD* in/out
    -Fiddle::TYPE_INT,  # PreferredMaximum : DWORD
    Fiddle::TYPE_VOIDP,  # OptionValues : DHCP_OPTION_VALUE_ARRAY** in/out
    Fiddle::TYPE_VOIDP,  # OptionsRead : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # OptionsTotal : DWORD* in/out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "dhcpsapi")]
extern "system" {
    fn DhcpEnumOptionValues(
        ServerIpAddress: *const u16,  // LPCWSTR optional
        ScopeInfo: *const DHCP_OPTION_SCOPE_INFO,  // DHCP_OPTION_SCOPE_INFO*
        ResumeHandle: *mut u32,  // DWORD* in/out
        PreferredMaximum: u32,  // DWORD
        OptionValues: *mut *mut DHCP_OPTION_VALUE_ARRAY,  // DHCP_OPTION_VALUE_ARRAY** in/out
        OptionsRead: *mut u32,  // DWORD* in/out
        OptionsTotal: *mut u32  // DWORD* in/out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("DHCPSAPI.dll")]
public static extern uint DhcpEnumOptionValues([MarshalAs(UnmanagedType.LPWStr)] string ServerIpAddress, IntPtr ScopeInfo, ref uint ResumeHandle, uint PreferredMaximum, IntPtr OptionValues, ref uint OptionsRead, ref uint OptionsTotal);
"@
$api = Add-Type -MemberDefinition $sig -Name 'DHCPSAPI_DhcpEnumOptionValues' -Namespace Win32 -PassThru
# $api::DhcpEnumOptionValues(ServerIpAddress, ScopeInfo, ResumeHandle, PreferredMaximum, OptionValues, OptionsRead, OptionsTotal)

#uselib "DHCPSAPI.dll"
#func global DhcpEnumOptionValues "DhcpEnumOptionValues" sptr, sptr, sptr, sptr, sptr, sptr, sptr
; DhcpEnumOptionValues ServerIpAddress, varptr(ScopeInfo), varptr(ResumeHandle), PreferredMaximum, varptr(OptionValues), varptr(OptionsRead), varptr(OptionsTotal)   ; 戻り値は stat
; ServerIpAddress : LPCWSTR optional -> "sptr"
; ScopeInfo : DHCP_OPTION_SCOPE_INFO* -> "sptr"
; ResumeHandle : DWORD* in/out -> "sptr"
; PreferredMaximum : DWORD -> "sptr"
; OptionValues : DHCP_OPTION_VALUE_ARRAY** in/out -> "sptr"
; OptionsRead : DWORD* in/out -> "sptr"
; OptionsTotal : DWORD* in/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 DhcpEnumOptionValues "DhcpEnumOptionValues" wstr, var, var, int, var, var, var
; res = DhcpEnumOptionValues(ServerIpAddress, ScopeInfo, ResumeHandle, PreferredMaximum, OptionValues, OptionsRead, OptionsTotal)
; ServerIpAddress : LPCWSTR optional -> "wstr"
; ScopeInfo : DHCP_OPTION_SCOPE_INFO* -> "var"
; ResumeHandle : DWORD* in/out -> "var"
; PreferredMaximum : DWORD -> "int"
; OptionValues : DHCP_OPTION_VALUE_ARRAY** in/out -> "var"
; OptionsRead : DWORD* in/out -> "var"
; OptionsTotal : DWORD* in/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 DhcpEnumOptionValues "DhcpEnumOptionValues" wstr, sptr, sptr, int, sptr, sptr, sptr
; res = DhcpEnumOptionValues(ServerIpAddress, varptr(ScopeInfo), varptr(ResumeHandle), PreferredMaximum, varptr(OptionValues), varptr(OptionsRead), varptr(OptionsTotal))
; ServerIpAddress : LPCWSTR optional -> "wstr"
; ScopeInfo : DHCP_OPTION_SCOPE_INFO* -> "sptr"
; ResumeHandle : DWORD* in/out -> "sptr"
; PreferredMaximum : DWORD -> "int"
; OptionValues : DHCP_OPTION_VALUE_ARRAY** in/out -> "sptr"
; OptionsRead : DWORD* in/out -> "sptr"
; OptionsTotal : DWORD* in/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 DhcpEnumOptionValues(LPCWSTR ServerIpAddress, DHCP_OPTION_SCOPE_INFO* ScopeInfo, DWORD* ResumeHandle, DWORD PreferredMaximum, DHCP_OPTION_VALUE_ARRAY** OptionValues, DWORD* OptionsRead, DWORD* OptionsTotal)
#uselib "DHCPSAPI.dll"
#cfunc global DhcpEnumOptionValues "DhcpEnumOptionValues" wstr, var, var, int, var, var, var
; res = DhcpEnumOptionValues(ServerIpAddress, ScopeInfo, ResumeHandle, PreferredMaximum, OptionValues, OptionsRead, OptionsTotal)
; ServerIpAddress : LPCWSTR optional -> "wstr"
; ScopeInfo : DHCP_OPTION_SCOPE_INFO* -> "var"
; ResumeHandle : DWORD* in/out -> "var"
; PreferredMaximum : DWORD -> "int"
; OptionValues : DHCP_OPTION_VALUE_ARRAY** in/out -> "var"
; OptionsRead : DWORD* in/out -> "var"
; OptionsTotal : DWORD* in/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 DhcpEnumOptionValues(LPCWSTR ServerIpAddress, DHCP_OPTION_SCOPE_INFO* ScopeInfo, DWORD* ResumeHandle, DWORD PreferredMaximum, DHCP_OPTION_VALUE_ARRAY** OptionValues, DWORD* OptionsRead, DWORD* OptionsTotal)
#uselib "DHCPSAPI.dll"
#cfunc global DhcpEnumOptionValues "DhcpEnumOptionValues" wstr, intptr, intptr, int, intptr, intptr, intptr
; res = DhcpEnumOptionValues(ServerIpAddress, varptr(ScopeInfo), varptr(ResumeHandle), PreferredMaximum, varptr(OptionValues), varptr(OptionsRead), varptr(OptionsTotal))
; ServerIpAddress : LPCWSTR optional -> "wstr"
; ScopeInfo : DHCP_OPTION_SCOPE_INFO* -> "intptr"
; ResumeHandle : DWORD* in/out -> "intptr"
; PreferredMaximum : DWORD -> "int"
; OptionValues : DHCP_OPTION_VALUE_ARRAY** in/out -> "intptr"
; OptionsRead : DWORD* in/out -> "intptr"
; OptionsTotal : DWORD* in/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")
	procDhcpEnumOptionValues = dhcpsapi.NewProc("DhcpEnumOptionValues")
)

// ServerIpAddress (LPCWSTR optional), ScopeInfo (DHCP_OPTION_SCOPE_INFO*), ResumeHandle (DWORD* in/out), PreferredMaximum (DWORD), OptionValues (DHCP_OPTION_VALUE_ARRAY** in/out), OptionsRead (DWORD* in/out), OptionsTotal (DWORD* in/out)
r1, _, err := procDhcpEnumOptionValues.Call(
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(ServerIpAddress))),
	uintptr(ScopeInfo),
	uintptr(ResumeHandle),
	uintptr(PreferredMaximum),
	uintptr(OptionValues),
	uintptr(OptionsRead),
	uintptr(OptionsTotal),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function DhcpEnumOptionValues(
  ServerIpAddress: PWideChar;   // LPCWSTR optional
  ScopeInfo: Pointer;   // DHCP_OPTION_SCOPE_INFO*
  ResumeHandle: Pointer;   // DWORD* in/out
  PreferredMaximum: DWORD;   // DWORD
  OptionValues: Pointer;   // DHCP_OPTION_VALUE_ARRAY** in/out
  OptionsRead: Pointer;   // DWORD* in/out
  OptionsTotal: Pointer   // DWORD* in/out
): DWORD; stdcall;
  external 'DHCPSAPI.dll' name 'DhcpEnumOptionValues';

result := DllCall("DHCPSAPI\DhcpEnumOptionValues"
    , "WStr", ServerIpAddress   ; LPCWSTR optional
    , "Ptr", ScopeInfo   ; DHCP_OPTION_SCOPE_INFO*
    , "Ptr", ResumeHandle   ; DWORD* in/out
    , "UInt", PreferredMaximum   ; DWORD
    , "Ptr", OptionValues   ; DHCP_OPTION_VALUE_ARRAY** in/out
    , "Ptr", OptionsRead   ; DWORD* in/out
    , "Ptr", OptionsTotal   ; DWORD* in/out
    , "UInt")   ; return: DWORD

●DhcpEnumOptionValues(ServerIpAddress, ScopeInfo, ResumeHandle, PreferredMaximum, OptionValues, OptionsRead, OptionsTotal) = DLL("DHCPSAPI.dll", "dword DhcpEnumOptionValues(char*, void*, void*, dword, void*, void*, void*)")
# 呼び出し: DhcpEnumOptionValues(ServerIpAddress, ScopeInfo, ResumeHandle, PreferredMaximum, OptionValues, OptionsRead, OptionsTotal)
# ServerIpAddress : LPCWSTR optional -> "char*"
# ScopeInfo : DHCP_OPTION_SCOPE_INFO* -> "void*"
# ResumeHandle : DWORD* in/out -> "void*"
# PreferredMaximum : DWORD -> "dword"
# OptionValues : DHCP_OPTION_VALUE_ARRAY** in/out -> "void*"
# OptionsRead : DWORD* in/out -> "void*"
# OptionsTotal : DWORD* in/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 DhcpEnumOptionValues(
    ServerIpAddress: [*c]const u16, // LPCWSTR optional
    ScopeInfo: [*c]DHCP_OPTION_SCOPE_INFO, // DHCP_OPTION_SCOPE_INFO*
    ResumeHandle: [*c]u32, // DWORD* in/out
    PreferredMaximum: u32, // DWORD
    OptionValues: [*c][*c]DHCP_OPTION_VALUE_ARRAY, // DHCP_OPTION_VALUE_ARRAY** in/out
    OptionsRead: [*c]u32, // DWORD* in/out
    OptionsTotal: [*c]u32 // DWORD* in/out
) callconv(std.os.windows.WINAPI) u32;

proc DhcpEnumOptionValues(
    ServerIpAddress: WideCString,  # LPCWSTR optional
    ScopeInfo: ptr DHCP_OPTION_SCOPE_INFO,  # DHCP_OPTION_SCOPE_INFO*
    ResumeHandle: ptr uint32,  # DWORD* in/out
    PreferredMaximum: uint32,  # DWORD
    OptionValues: ptr DHCP_OPTION_VALUE_ARRAY,  # DHCP_OPTION_VALUE_ARRAY** in/out
    OptionsRead: ptr uint32,  # DWORD* in/out
    OptionsTotal: ptr uint32  # DWORD* in/out
): uint32 {.importc: "DhcpEnumOptionValues", stdcall, dynlib: "DHCPSAPI.dll".}

pragma(lib, "dhcpsapi");
extern(Windows)
uint DhcpEnumOptionValues(
    const(wchar)* ServerIpAddress,   // LPCWSTR optional
    DHCP_OPTION_SCOPE_INFO* ScopeInfo,   // DHCP_OPTION_SCOPE_INFO*
    uint* ResumeHandle,   // DWORD* in/out
    uint PreferredMaximum,   // DWORD
    DHCP_OPTION_VALUE_ARRAY** OptionValues,   // DHCP_OPTION_VALUE_ARRAY** in/out
    uint* OptionsRead,   // DWORD* in/out
    uint* OptionsTotal   // DWORD* in/out
);

ccall((:DhcpEnumOptionValues, "DHCPSAPI.dll"), stdcall, UInt32,
      (Cwstring, Ptr{DHCP_OPTION_SCOPE_INFO}, Ptr{UInt32}, UInt32, Ptr{DHCP_OPTION_VALUE_ARRAY}, Ptr{UInt32}, Ptr{UInt32}),
      ServerIpAddress, ScopeInfo, ResumeHandle, PreferredMaximum, OptionValues, OptionsRead, OptionsTotal)
# ServerIpAddress : LPCWSTR optional -> Cwstring
# ScopeInfo : DHCP_OPTION_SCOPE_INFO* -> Ptr{DHCP_OPTION_SCOPE_INFO}
# ResumeHandle : DWORD* in/out -> Ptr{UInt32}
# PreferredMaximum : DWORD -> UInt32
# OptionValues : DHCP_OPTION_VALUE_ARRAY** in/out -> Ptr{DHCP_OPTION_VALUE_ARRAY}
# OptionsRead : DWORD* in/out -> Ptr{UInt32}
# OptionsTotal : DWORD* in/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 DhcpEnumOptionValues(
    const uint16_t* ServerIpAddress,
    void* ScopeInfo,
    uint32_t* ResumeHandle,
    uint32_t PreferredMaximum,
    void* OptionValues,
    uint32_t* OptionsRead,
    uint32_t* OptionsTotal);
]]
local dhcpsapi = ffi.load("dhcpsapi")
-- dhcpsapi.DhcpEnumOptionValues(ServerIpAddress, ScopeInfo, ResumeHandle, PreferredMaximum, OptionValues, OptionsRead, OptionsTotal)
-- ServerIpAddress : LPCWSTR optional
-- ScopeInfo : DHCP_OPTION_SCOPE_INFO*
-- ResumeHandle : DWORD* in/out
-- PreferredMaximum : DWORD
-- OptionValues : DHCP_OPTION_VALUE_ARRAY** in/out
-- OptionsRead : DWORD* in/out
-- OptionsTotal : DWORD* in/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 DhcpEnumOptionValues = lib.func('__stdcall', 'DhcpEnumOptionValues', 'uint32_t', ['str16', 'void *', 'uint32_t *', 'uint32_t', 'void *', 'uint32_t *', 'uint32_t *']);
// DhcpEnumOptionValues(ServerIpAddress, ScopeInfo, ResumeHandle, PreferredMaximum, OptionValues, OptionsRead, OptionsTotal)
// ServerIpAddress : LPCWSTR optional -> 'str16'
// ScopeInfo : DHCP_OPTION_SCOPE_INFO* -> 'void *'
// ResumeHandle : DWORD* in/out -> 'uint32_t *'
// PreferredMaximum : DWORD -> 'uint32_t'
// OptionValues : DHCP_OPTION_VALUE_ARRAY** in/out -> 'void *'
// OptionsRead : DWORD* in/out -> 'uint32_t *'
// OptionsTotal : DWORD* in/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", {
  DhcpEnumOptionValues: { parameters: ["buffer", "pointer", "pointer", "u32", "pointer", "pointer", "pointer"], result: "u32" },
});
// lib.symbols.DhcpEnumOptionValues(ServerIpAddress, ScopeInfo, ResumeHandle, PreferredMaximum, OptionValues, OptionsRead, OptionsTotal)
// ServerIpAddress : LPCWSTR optional -> "buffer"
// ScopeInfo : DHCP_OPTION_SCOPE_INFO* -> "pointer"
// ResumeHandle : DWORD* in/out -> "pointer"
// PreferredMaximum : DWORD -> "u32"
// OptionValues : DHCP_OPTION_VALUE_ARRAY** in/out -> "pointer"
// OptionsRead : DWORD* in/out -> "pointer"
// OptionsTotal : DWORD* in/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 DhcpEnumOptionValues(
    const uint16_t* ServerIpAddress,
    void* ScopeInfo,
    uint32_t* ResumeHandle,
    uint32_t PreferredMaximum,
    void* OptionValues,
    uint32_t* OptionsRead,
    uint32_t* OptionsTotal);
C, "DHCPSAPI.dll");
// $ffi->DhcpEnumOptionValues(ServerIpAddress, ScopeInfo, ResumeHandle, PreferredMaximum, OptionValues, OptionsRead, OptionsTotal);
// ServerIpAddress : LPCWSTR optional
// ScopeInfo : DHCP_OPTION_SCOPE_INFO*
// ResumeHandle : DWORD* in/out
// PreferredMaximum : DWORD
// OptionValues : DHCP_OPTION_VALUE_ARRAY** in/out
// OptionsRead : DWORD* in/out
// OptionsTotal : DWORD* in/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 DhcpEnumOptionValues(
        WString ServerIpAddress,   // LPCWSTR optional
        Pointer ScopeInfo,   // DHCP_OPTION_SCOPE_INFO*
        IntByReference ResumeHandle,   // DWORD* in/out
        int PreferredMaximum,   // DWORD
        Pointer OptionValues,   // DHCP_OPTION_VALUE_ARRAY** in/out
        IntByReference OptionsRead,   // DWORD* in/out
        IntByReference OptionsTotal   // DWORD* in/out
    );
}

@[Link("dhcpsapi")]
lib LibDHCPSAPI
  fun DhcpEnumOptionValues = DhcpEnumOptionValues(
    ServerIpAddress : UInt16*,   # LPCWSTR optional
    ScopeInfo : DHCP_OPTION_SCOPE_INFO*,   # DHCP_OPTION_SCOPE_INFO*
    ResumeHandle : UInt32*,   # DWORD* in/out
    PreferredMaximum : UInt32,   # DWORD
    OptionValues : DHCP_OPTION_VALUE_ARRAY**,   # DHCP_OPTION_VALUE_ARRAY** in/out
    OptionsRead : UInt32*,   # DWORD* in/out
    OptionsTotal : UInt32*   # DWORD* in/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 DhcpEnumOptionValuesNative = Uint32 Function(Pointer<Utf16>, Pointer<Void>, Pointer<Uint32>, Uint32, Pointer<Void>, Pointer<Uint32>, Pointer<Uint32>);
typedef DhcpEnumOptionValuesDart = int Function(Pointer<Utf16>, Pointer<Void>, Pointer<Uint32>, int, Pointer<Void>, Pointer<Uint32>, Pointer<Uint32>);
final DhcpEnumOptionValues = DynamicLibrary.open('DHCPSAPI.dll')
    .lookupFunction<DhcpEnumOptionValuesNative, DhcpEnumOptionValuesDart>('DhcpEnumOptionValues');
// ServerIpAddress : LPCWSTR optional -> Pointer<Utf16>
// ScopeInfo : DHCP_OPTION_SCOPE_INFO* -> Pointer<Void>
// ResumeHandle : DWORD* in/out -> Pointer<Uint32>
// PreferredMaximum : DWORD -> Uint32
// OptionValues : DHCP_OPTION_VALUE_ARRAY** in/out -> Pointer<Void>
// OptionsRead : DWORD* in/out -> Pointer<Uint32>
// OptionsTotal : DWORD* in/out -> Pointer<Uint32>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function DhcpEnumOptionValues(
  ServerIpAddress: PWideChar;   // LPCWSTR optional
  ScopeInfo: Pointer;   // DHCP_OPTION_SCOPE_INFO*
  ResumeHandle: Pointer;   // DWORD* in/out
  PreferredMaximum: DWORD;   // DWORD
  OptionValues: Pointer;   // DHCP_OPTION_VALUE_ARRAY** in/out
  OptionsRead: Pointer;   // DWORD* in/out
  OptionsTotal: Pointer   // DWORD* in/out
): DWORD; stdcall;
  external 'DHCPSAPI.dll' name 'DhcpEnumOptionValues';

import Foreign
import Foreign.C.Types
import Foreign.C.String

foreign import stdcall safe "DhcpEnumOptionValues"
  c_DhcpEnumOptionValues :: CWString -> Ptr () -> Ptr Word32 -> Word32 -> Ptr () -> Ptr Word32 -> Ptr Word32 -> IO Word32
-- ServerIpAddress : LPCWSTR optional -> CWString
-- ScopeInfo : DHCP_OPTION_SCOPE_INFO* -> Ptr ()
-- ResumeHandle : DWORD* in/out -> Ptr Word32
-- PreferredMaximum : DWORD -> Word32
-- OptionValues : DHCP_OPTION_VALUE_ARRAY** in/out -> Ptr ()
-- OptionsRead : DWORD* in/out -> Ptr Word32
-- OptionsTotal : DWORD* in/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 dhcpenumoptionvalues =
  foreign "DhcpEnumOptionValues"
    ((ptr uint16_t) @-> (ptr void) @-> (ptr uint32_t) @-> uint32_t @-> (ptr void) @-> (ptr uint32_t) @-> (ptr uint32_t) @-> returning uint32_t)
(* ServerIpAddress : LPCWSTR optional -> (ptr uint16_t) *)
(* ScopeInfo : DHCP_OPTION_SCOPE_INFO* -> (ptr void) *)
(* ResumeHandle : DWORD* in/out -> (ptr uint32_t) *)
(* PreferredMaximum : DWORD -> uint32_t *)
(* OptionValues : DHCP_OPTION_VALUE_ARRAY** in/out -> (ptr void) *)
(* OptionsRead : DWORD* in/out -> (ptr uint32_t) *)
(* OptionsTotal : DWORD* in/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 ("DhcpEnumOptionValues" dhcp-enum-option-values :convention :stdcall) :uint32
  (server-ip-address (:string :encoding :utf-16le))   ; LPCWSTR optional
  (scope-info :pointer)   ; DHCP_OPTION_SCOPE_INFO*
  (resume-handle :pointer)   ; DWORD* in/out
  (preferred-maximum :uint32)   ; DWORD
  (option-values :pointer)   ; DHCP_OPTION_VALUE_ARRAY** in/out
  (options-read :pointer)   ; DWORD* in/out
  (options-total :pointer))   ; DWORD* in/out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $DhcpEnumOptionValues = Win32::API::More->new('DHCPSAPI',
    'DWORD DhcpEnumOptionValues(LPCWSTR ServerIpAddress, LPVOID ScopeInfo, LPVOID ResumeHandle, DWORD PreferredMaximum, LPVOID OptionValues, LPVOID OptionsRead, LPVOID OptionsTotal)');
# my $ret = $DhcpEnumOptionValues->Call($ServerIpAddress, $ScopeInfo, $ResumeHandle, $PreferredMaximum, $OptionValues, $OptionsRead, $OptionsTotal);
# ServerIpAddress : LPCWSTR optional -> LPCWSTR
# ScopeInfo : DHCP_OPTION_SCOPE_INFO* -> LPVOID
# ResumeHandle : DWORD* in/out -> LPVOID
# PreferredMaximum : DWORD -> DWORD
# OptionValues : DHCP_OPTION_VALUE_ARRAY** in/out -> LPVOID
# OptionsRead : DWORD* in/out -> LPVOID
# OptionsTotal : DWORD* in/out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。

DhcpEnumOptionValues

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