ホーム › NetworkManagement.Dhcp › DhcpRequestParams

DhcpRequestParams

関数

DHCPサーバーから指定オプションパラメータを要求し取得する。

DLLdhcpcsvc.dll呼出規約winapi対応OSWindows 2000 以降

シグネチャ

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

DWORD DhcpRequestParams(
    DWORD Flags,
    void* Reserved,
    LPWSTR AdapterName,
    DHCPCAPI_CLASSID* ClassId,
    DHCPCAPI_PARAMS_ARRAY SendParams,
    DHCPCAPI_PARAMS_ARRAY RecdParams,
    BYTE* Buffer,
    DWORD* pSize,
    LPWSTR RequestIdStr
);

パラメーター

名前	型	方向	説明
Flags	DWORD	in	要求動作を制御するフラグ(DHCPCAPI_REQUEST_SYNCHRONOUS等)を指定する。
Reserved	void*	inout	予約パラメータ。NULLを指定する。
AdapterName	LPWSTR	in	対象ネットワークアダプタ名(Unicode)へのポインタ。
ClassId	DHCPCAPI_CLASSID*	inout	DHCPクラスIDを格納したDHCPCAPI_CLASSID構造体へのポインタ。NULL可。
SendParams	DHCPCAPI_PARAMS_ARRAY	in	サーバに送信するパラメータを記述したDHCPCAPI_PARAMS_ARRAY構造体。
RecdParams	DHCPCAPI_PARAMS_ARRAY	in	サーバから受信したいパラメータを記述するDHCPCAPI_PARAMS_ARRAY構造体。
Buffer	BYTE*	out	取得したパラメータ値を受け取るバイトバッファへのポインタ。
pSize	DWORD*	inout	Bufferのサイズを渡し、必要サイズを受け取るDWORDへのポインタ。
RequestIdStr	LPWSTR	in	要求を識別する一意のID文字列(Unicode)へのポインタ。後で取り消すために使う。

戻り値の型: DWORD

各言語での呼び出し定義

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

DWORD DhcpRequestParams(
    DWORD Flags,
    void* Reserved,
    LPWSTR AdapterName,
    DHCPCAPI_CLASSID* ClassId,
    DHCPCAPI_PARAMS_ARRAY SendParams,
    DHCPCAPI_PARAMS_ARRAY RecdParams,
    BYTE* Buffer,
    DWORD* pSize,
    LPWSTR RequestIdStr
);

[DllImport("dhcpcsvc.dll", ExactSpelling = true)]
static extern uint DhcpRequestParams(
    uint Flags,   // DWORD
    IntPtr Reserved,   // void* in/out
    [MarshalAs(UnmanagedType.LPWStr)] string AdapterName,   // LPWSTR
    IntPtr ClassId,   // DHCPCAPI_CLASSID* in/out
    DHCPCAPI_PARAMS_ARRAY SendParams,   // DHCPCAPI_PARAMS_ARRAY
    DHCPCAPI_PARAMS_ARRAY RecdParams,   // DHCPCAPI_PARAMS_ARRAY
    IntPtr Buffer,   // BYTE* out
    ref uint pSize,   // DWORD* in/out
    [MarshalAs(UnmanagedType.LPWStr)] string RequestIdStr   // LPWSTR
);

<DllImport("dhcpcsvc.dll", ExactSpelling:=True)>
Public Shared Function DhcpRequestParams(
    Flags As UInteger,   ' DWORD
    Reserved As IntPtr,   ' void* in/out
    <MarshalAs(UnmanagedType.LPWStr)> AdapterName As String,   ' LPWSTR
    ClassId As IntPtr,   ' DHCPCAPI_CLASSID* in/out
    SendParams As DHCPCAPI_PARAMS_ARRAY,   ' DHCPCAPI_PARAMS_ARRAY
    RecdParams As DHCPCAPI_PARAMS_ARRAY,   ' DHCPCAPI_PARAMS_ARRAY
    Buffer As IntPtr,   ' BYTE* out
    ByRef pSize As UInteger,   ' DWORD* in/out
    <MarshalAs(UnmanagedType.LPWStr)> RequestIdStr As String   ' LPWSTR
) As UInteger
End Function

' Flags : DWORD
' Reserved : void* in/out
' AdapterName : LPWSTR
' ClassId : DHCPCAPI_CLASSID* in/out
' SendParams : DHCPCAPI_PARAMS_ARRAY
' RecdParams : DHCPCAPI_PARAMS_ARRAY
' Buffer : BYTE* out
' pSize : DWORD* in/out
' RequestIdStr : LPWSTR
Declare PtrSafe Function DhcpRequestParams Lib "dhcpcsvc" ( _
    ByVal Flags As Long, _
    ByVal Reserved As LongPtr, _
    ByVal AdapterName As LongPtr, _
    ByVal ClassId As LongPtr, _
    ByVal SendParams As LongPtr, _
    ByVal RecdParams As LongPtr, _
    ByVal Buffer As LongPtr, _
    ByRef pSize As Long, _
    ByVal RequestIdStr As LongPtr) As Long
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

DhcpRequestParams = ctypes.windll.dhcpcsvc.DhcpRequestParams
DhcpRequestParams.restype = wintypes.DWORD
DhcpRequestParams.argtypes = [
    wintypes.DWORD,  # Flags : DWORD
    ctypes.POINTER(None),  # Reserved : void* in/out
    wintypes.LPCWSTR,  # AdapterName : LPWSTR
    ctypes.c_void_p,  # ClassId : DHCPCAPI_CLASSID* in/out
    DHCPCAPI_PARAMS_ARRAY,  # SendParams : DHCPCAPI_PARAMS_ARRAY
    DHCPCAPI_PARAMS_ARRAY,  # RecdParams : DHCPCAPI_PARAMS_ARRAY
    ctypes.POINTER(ctypes.c_ubyte),  # Buffer : BYTE* out
    ctypes.POINTER(wintypes.DWORD),  # pSize : DWORD* in/out
    wintypes.LPCWSTR,  # RequestIdStr : LPWSTR
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('dhcpcsvc.dll')
DhcpRequestParams = Fiddle::Function.new(
  lib['DhcpRequestParams'],
  [
    -Fiddle::TYPE_INT,  # Flags : DWORD
    Fiddle::TYPE_VOIDP,  # Reserved : void* in/out
    Fiddle::TYPE_VOIDP,  # AdapterName : LPWSTR
    Fiddle::TYPE_VOIDP,  # ClassId : DHCPCAPI_CLASSID* in/out
    Fiddle::TYPE_VOIDP,  # SendParams : DHCPCAPI_PARAMS_ARRAY
    Fiddle::TYPE_VOIDP,  # RecdParams : DHCPCAPI_PARAMS_ARRAY
    Fiddle::TYPE_VOIDP,  # Buffer : BYTE* out
    Fiddle::TYPE_VOIDP,  # pSize : DWORD* in/out
    Fiddle::TYPE_VOIDP,  # RequestIdStr : LPWSTR
  ],
  -Fiddle::TYPE_INT)

#[link(name = "dhcpcsvc")]
extern "system" {
    fn DhcpRequestParams(
        Flags: u32,  // DWORD
        Reserved: *mut (),  // void* in/out
        AdapterName: *mut u16,  // LPWSTR
        ClassId: *mut DHCPCAPI_CLASSID,  // DHCPCAPI_CLASSID* in/out
        SendParams: DHCPCAPI_PARAMS_ARRAY,  // DHCPCAPI_PARAMS_ARRAY
        RecdParams: DHCPCAPI_PARAMS_ARRAY,  // DHCPCAPI_PARAMS_ARRAY
        Buffer: *mut u8,  // BYTE* out
        pSize: *mut u32,  // DWORD* in/out
        RequestIdStr: *mut u16  // LPWSTR
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("dhcpcsvc.dll")]
public static extern uint DhcpRequestParams(uint Flags, IntPtr Reserved, [MarshalAs(UnmanagedType.LPWStr)] string AdapterName, IntPtr ClassId, DHCPCAPI_PARAMS_ARRAY SendParams, DHCPCAPI_PARAMS_ARRAY RecdParams, IntPtr Buffer, ref uint pSize, [MarshalAs(UnmanagedType.LPWStr)] string RequestIdStr);
"@
$api = Add-Type -MemberDefinition $sig -Name 'dhcpcsvc_DhcpRequestParams' -Namespace Win32 -PassThru
# $api::DhcpRequestParams(Flags, Reserved, AdapterName, ClassId, SendParams, RecdParams, Buffer, pSize, RequestIdStr)

#uselib "dhcpcsvc.dll"
#func global DhcpRequestParams "DhcpRequestParams" sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr
; DhcpRequestParams Flags, Reserved, AdapterName, varptr(ClassId), SendParams, RecdParams, varptr(Buffer), varptr(pSize), RequestIdStr   ; 戻り値は stat
; Flags : DWORD -> "sptr"
; Reserved : void* in/out -> "sptr"
; AdapterName : LPWSTR -> "sptr"
; ClassId : DHCPCAPI_CLASSID* in/out -> "sptr"
; SendParams : DHCPCAPI_PARAMS_ARRAY -> "sptr"
; RecdParams : DHCPCAPI_PARAMS_ARRAY -> "sptr"
; Buffer : BYTE* out -> "sptr"
; pSize : DWORD* in/out -> "sptr"
; RequestIdStr : LPWSTR -> "sptr"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。
; ※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 "dhcpcsvc.dll"
#cfunc global DhcpRequestParams "DhcpRequestParams" int, sptr, wstr, var, int, int, var, var, wstr
; res = DhcpRequestParams(Flags, Reserved, AdapterName, ClassId, SendParams, RecdParams, Buffer, pSize, RequestIdStr)
; Flags : DWORD -> "int"
; Reserved : void* in/out -> "sptr"
; AdapterName : LPWSTR -> "wstr"
; ClassId : DHCPCAPI_CLASSID* in/out -> "var"
; SendParams : DHCPCAPI_PARAMS_ARRAY -> "int"
; RecdParams : DHCPCAPI_PARAMS_ARRAY -> "int"
; Buffer : BYTE* out -> "var"
; pSize : DWORD* in/out -> "var"
; RequestIdStr : LPWSTR -> "wstr"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。
; ※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 "dhcpcsvc.dll"
#cfunc global DhcpRequestParams "DhcpRequestParams" int, sptr, wstr, sptr, int, int, sptr, sptr, wstr
; res = DhcpRequestParams(Flags, Reserved, AdapterName, varptr(ClassId), SendParams, RecdParams, varptr(Buffer), varptr(pSize), RequestIdStr)
; Flags : DWORD -> "int"
; Reserved : void* in/out -> "sptr"
; AdapterName : LPWSTR -> "wstr"
; ClassId : DHCPCAPI_CLASSID* in/out -> "sptr"
; SendParams : DHCPCAPI_PARAMS_ARRAY -> "int"
; RecdParams : DHCPCAPI_PARAMS_ARRAY -> "int"
; Buffer : BYTE* out -> "sptr"
; pSize : DWORD* in/out -> "sptr"
; RequestIdStr : LPWSTR -> "wstr"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。
; ※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 DhcpRequestParams(DWORD Flags, void* Reserved, LPWSTR AdapterName, DHCPCAPI_CLASSID* ClassId, DHCPCAPI_PARAMS_ARRAY SendParams, DHCPCAPI_PARAMS_ARRAY RecdParams, BYTE* Buffer, DWORD* pSize, LPWSTR RequestIdStr)
#uselib "dhcpcsvc.dll"
#cfunc global DhcpRequestParams "DhcpRequestParams" int, intptr, wstr, var, int, int, var, var, wstr
; res = DhcpRequestParams(Flags, Reserved, AdapterName, ClassId, SendParams, RecdParams, Buffer, pSize, RequestIdStr)
; Flags : DWORD -> "int"
; Reserved : void* in/out -> "intptr"
; AdapterName : LPWSTR -> "wstr"
; ClassId : DHCPCAPI_CLASSID* in/out -> "var"
; SendParams : DHCPCAPI_PARAMS_ARRAY -> "int"
; RecdParams : DHCPCAPI_PARAMS_ARRAY -> "int"
; Buffer : BYTE* out -> "var"
; pSize : DWORD* in/out -> "var"
; RequestIdStr : LPWSTR -> "wstr"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。
; ※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 DhcpRequestParams(DWORD Flags, void* Reserved, LPWSTR AdapterName, DHCPCAPI_CLASSID* ClassId, DHCPCAPI_PARAMS_ARRAY SendParams, DHCPCAPI_PARAMS_ARRAY RecdParams, BYTE* Buffer, DWORD* pSize, LPWSTR RequestIdStr)
#uselib "dhcpcsvc.dll"
#cfunc global DhcpRequestParams "DhcpRequestParams" int, intptr, wstr, intptr, int, int, intptr, intptr, wstr
; res = DhcpRequestParams(Flags, Reserved, AdapterName, varptr(ClassId), SendParams, RecdParams, varptr(Buffer), varptr(pSize), RequestIdStr)
; Flags : DWORD -> "int"
; Reserved : void* in/out -> "intptr"
; AdapterName : LPWSTR -> "wstr"
; ClassId : DHCPCAPI_CLASSID* in/out -> "intptr"
; SendParams : DHCPCAPI_PARAMS_ARRAY -> "int"
; RecdParams : DHCPCAPI_PARAMS_ARRAY -> "int"
; Buffer : BYTE* out -> "intptr"
; pSize : DWORD* in/out -> "intptr"
; RequestIdStr : LPWSTR -> "wstr"
; ※値渡し構造体は直接渡せません。intにパック、または var で構造体変数を渡してください。
; ※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 (
	dhcpcsvc = windows.NewLazySystemDLL("dhcpcsvc.dll")
	procDhcpRequestParams = dhcpcsvc.NewProc("DhcpRequestParams")
)

// Flags (DWORD), Reserved (void* in/out), AdapterName (LPWSTR), ClassId (DHCPCAPI_CLASSID* in/out), SendParams (DHCPCAPI_PARAMS_ARRAY), RecdParams (DHCPCAPI_PARAMS_ARRAY), Buffer (BYTE* out), pSize (DWORD* in/out), RequestIdStr (LPWSTR)
r1, _, err := procDhcpRequestParams.Call(
	uintptr(Flags),
	uintptr(Reserved),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(AdapterName))),
	uintptr(ClassId),
	uintptr(SendParams),
	uintptr(RecdParams),
	uintptr(Buffer),
	uintptr(pSize),
	uintptr(unsafe.Pointer(windows.StringToUTF16Ptr(RequestIdStr))),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function DhcpRequestParams(
  Flags: DWORD;   // DWORD
  Reserved: Pointer;   // void* in/out
  AdapterName: PWideChar;   // LPWSTR
  ClassId: Pointer;   // DHCPCAPI_CLASSID* in/out
  SendParams: DHCPCAPI_PARAMS_ARRAY;   // DHCPCAPI_PARAMS_ARRAY
  RecdParams: DHCPCAPI_PARAMS_ARRAY;   // DHCPCAPI_PARAMS_ARRAY
  Buffer: Pointer;   // BYTE* out
  pSize: Pointer;   // DWORD* in/out
  RequestIdStr: PWideChar   // LPWSTR
): DWORD; stdcall;
  external 'dhcpcsvc.dll' name 'DhcpRequestParams';

result := DllCall("dhcpcsvc\DhcpRequestParams"
    , "UInt", Flags   ; DWORD
    , "Ptr", Reserved   ; void* in/out
    , "WStr", AdapterName   ; LPWSTR
    , "Ptr", ClassId   ; DHCPCAPI_CLASSID* in/out
    , "Ptr", SendParams   ; DHCPCAPI_PARAMS_ARRAY
    , "Ptr", RecdParams   ; DHCPCAPI_PARAMS_ARRAY
    , "Ptr", Buffer   ; BYTE* out
    , "Ptr", pSize   ; DWORD* in/out
    , "WStr", RequestIdStr   ; LPWSTR
    , "UInt")   ; return: DWORD

●DhcpRequestParams(Flags, Reserved, AdapterName, ClassId, SendParams, RecdParams, Buffer, pSize, RequestIdStr) = DLL("dhcpcsvc.dll", "dword DhcpRequestParams(dword, void*, char*, void*, void*, void*, void*, void*, char*)")
# 呼び出し: DhcpRequestParams(Flags, Reserved, AdapterName, ClassId, SendParams, RecdParams, Buffer, pSize, RequestIdStr)
# Flags : DWORD -> "dword"
# Reserved : void* in/out -> "void*"
# AdapterName : LPWSTR -> "char*"
# ClassId : DHCPCAPI_CLASSID* in/out -> "void*"
# SendParams : DHCPCAPI_PARAMS_ARRAY -> "void*"
# RecdParams : DHCPCAPI_PARAMS_ARRAY -> "void*"
# Buffer : BYTE* out -> "void*"
# pSize : DWORD* in/out -> "void*"
# RequestIdStr : LPWSTR -> "char*"
# 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 "dhcpcsvc" fn DhcpRequestParams(
    Flags: u32, // DWORD
    Reserved: ?*anyopaque, // void* in/out
    AdapterName: [*c]const u16, // LPWSTR
    ClassId: [*c]DHCPCAPI_CLASSID, // DHCPCAPI_CLASSID* in/out
    SendParams: DHCPCAPI_PARAMS_ARRAY, // DHCPCAPI_PARAMS_ARRAY
    RecdParams: DHCPCAPI_PARAMS_ARRAY, // DHCPCAPI_PARAMS_ARRAY
    Buffer: [*c]u8, // BYTE* out
    pSize: [*c]u32, // DWORD* in/out
    RequestIdStr: [*c]const u16 // LPWSTR
) callconv(std.os.windows.WINAPI) u32;

proc DhcpRequestParams(
    Flags: uint32,  # DWORD
    Reserved: pointer,  # void* in/out
    AdapterName: WideCString,  # LPWSTR
    ClassId: ptr DHCPCAPI_CLASSID,  # DHCPCAPI_CLASSID* in/out
    SendParams: DHCPCAPI_PARAMS_ARRAY,  # DHCPCAPI_PARAMS_ARRAY
    RecdParams: DHCPCAPI_PARAMS_ARRAY,  # DHCPCAPI_PARAMS_ARRAY
    Buffer: ptr uint8,  # BYTE* out
    pSize: ptr uint32,  # DWORD* in/out
    RequestIdStr: WideCString  # LPWSTR
): uint32 {.importc: "DhcpRequestParams", stdcall, dynlib: "dhcpcsvc.dll".}

pragma(lib, "dhcpcsvc");
extern(Windows)
uint DhcpRequestParams(
    uint Flags,   // DWORD
    void* Reserved,   // void* in/out
    const(wchar)* AdapterName,   // LPWSTR
    DHCPCAPI_CLASSID* ClassId,   // DHCPCAPI_CLASSID* in/out
    DHCPCAPI_PARAMS_ARRAY SendParams,   // DHCPCAPI_PARAMS_ARRAY
    DHCPCAPI_PARAMS_ARRAY RecdParams,   // DHCPCAPI_PARAMS_ARRAY
    ubyte* Buffer,   // BYTE* out
    uint* pSize,   // DWORD* in/out
    const(wchar)* RequestIdStr   // LPWSTR
);

ccall((:DhcpRequestParams, "dhcpcsvc.dll"), stdcall, UInt32,
      (UInt32, Ptr{Cvoid}, Cwstring, Ptr{DHCPCAPI_CLASSID}, DHCPCAPI_PARAMS_ARRAY, DHCPCAPI_PARAMS_ARRAY, Ptr{UInt8}, Ptr{UInt32}, Cwstring),
      Flags, Reserved, AdapterName, ClassId, SendParams, RecdParams, Buffer, pSize, RequestIdStr)
# Flags : DWORD -> UInt32
# Reserved : void* in/out -> Ptr{Cvoid}
# AdapterName : LPWSTR -> Cwstring
# ClassId : DHCPCAPI_CLASSID* in/out -> Ptr{DHCPCAPI_CLASSID}
# SendParams : DHCPCAPI_PARAMS_ARRAY -> DHCPCAPI_PARAMS_ARRAY
# RecdParams : DHCPCAPI_PARAMS_ARRAY -> DHCPCAPI_PARAMS_ARRAY
# Buffer : BYTE* out -> Ptr{UInt8}
# pSize : DWORD* in/out -> Ptr{UInt32}
# RequestIdStr : LPWSTR -> Cwstring
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
uint32_t DhcpRequestParams(
    uint32_t Flags,
    void* Reserved,
    const uint16_t* AdapterName,
    void* ClassId,
    DHCPCAPI_PARAMS_ARRAY SendParams,
    DHCPCAPI_PARAMS_ARRAY RecdParams,
    uint8_t* Buffer,
    uint32_t* pSize,
    const uint16_t* RequestIdStr);
]]
local dhcpcsvc = ffi.load("dhcpcsvc")
-- dhcpcsvc.DhcpRequestParams(Flags, Reserved, AdapterName, ClassId, SendParams, RecdParams, Buffer, pSize, RequestIdStr)
-- Flags : DWORD
-- Reserved : void* in/out
-- AdapterName : LPWSTR
-- ClassId : DHCPCAPI_CLASSID* in/out
-- SendParams : DHCPCAPI_PARAMS_ARRAY
-- RecdParams : DHCPCAPI_PARAMS_ARRAY
-- Buffer : BYTE* out
-- pSize : DWORD* in/out
-- RequestIdStr : LPWSTR
-- 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('dhcpcsvc.dll');
const DhcpRequestParams = lib.func('__stdcall', 'DhcpRequestParams', 'uint32_t', ['uint32_t', 'void *', 'str16', 'void *', 'DHCPCAPI_PARAMS_ARRAY', 'DHCPCAPI_PARAMS_ARRAY', 'uint8_t *', 'uint32_t *', 'str16']);
// DhcpRequestParams(Flags, Reserved, AdapterName, ClassId, SendParams, RecdParams, Buffer, pSize, RequestIdStr)
// Flags : DWORD -> 'uint32_t'
// Reserved : void* in/out -> 'void *'
// AdapterName : LPWSTR -> 'str16'
// ClassId : DHCPCAPI_CLASSID* in/out -> 'void *'
// SendParams : DHCPCAPI_PARAMS_ARRAY -> 'DHCPCAPI_PARAMS_ARRAY'
// RecdParams : DHCPCAPI_PARAMS_ARRAY -> 'DHCPCAPI_PARAMS_ARRAY'
// Buffer : BYTE* out -> 'uint8_t *'
// pSize : DWORD* in/out -> 'uint32_t *'
// RequestIdStr : LPWSTR -> 'str16'
// 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("dhcpcsvc.dll", {
  DhcpRequestParams: { parameters: ["u32", "pointer", "buffer", "pointer", "buffer", "buffer", "pointer", "pointer", "buffer"], result: "u32" },
});
// lib.symbols.DhcpRequestParams(Flags, Reserved, AdapterName, ClassId, SendParams, RecdParams, Buffer, pSize, RequestIdStr)
// Flags : DWORD -> "u32"
// Reserved : void* in/out -> "pointer"
// AdapterName : LPWSTR -> "buffer"
// ClassId : DHCPCAPI_CLASSID* in/out -> "pointer"
// SendParams : DHCPCAPI_PARAMS_ARRAY -> "buffer"
// RecdParams : DHCPCAPI_PARAMS_ARRAY -> "buffer"
// Buffer : BYTE* out -> "pointer"
// pSize : DWORD* in/out -> "pointer"
// RequestIdStr : LPWSTR -> "buffer"
// 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 DhcpRequestParams(
    uint32_t Flags,
    void* Reserved,
    const uint16_t* AdapterName,
    void* ClassId,
    DHCPCAPI_PARAMS_ARRAY SendParams,
    DHCPCAPI_PARAMS_ARRAY RecdParams,
    uint8_t* Buffer,
    uint32_t* pSize,
    const uint16_t* RequestIdStr);
C, "dhcpcsvc.dll");
// $ffi->DhcpRequestParams(Flags, Reserved, AdapterName, ClassId, SendParams, RecdParams, Buffer, pSize, RequestIdStr);
// Flags : DWORD
// Reserved : void* in/out
// AdapterName : LPWSTR
// ClassId : DHCPCAPI_CLASSID* in/out
// SendParams : DHCPCAPI_PARAMS_ARRAY
// RecdParams : DHCPCAPI_PARAMS_ARRAY
// Buffer : BYTE* out
// pSize : DWORD* in/out
// RequestIdStr : LPWSTR
// 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 Dhcpcsvc extends StdCallLibrary {
    Dhcpcsvc INSTANCE = Native.load("dhcpcsvc", Dhcpcsvc.class);
    int DhcpRequestParams(
        int Flags,   // DWORD
        Pointer Reserved,   // void* in/out
        WString AdapterName,   // LPWSTR
        Pointer ClassId,   // DHCPCAPI_CLASSID* in/out
        DHCPCAPI_PARAMS_ARRAY /* extends Structure (by value) */ SendParams,   // DHCPCAPI_PARAMS_ARRAY
        DHCPCAPI_PARAMS_ARRAY /* extends Structure (by value) */ RecdParams,   // DHCPCAPI_PARAMS_ARRAY
        byte[] Buffer,   // BYTE* out
        IntByReference pSize,   // DWORD* in/out
        WString RequestIdStr   // LPWSTR
    );
}

@[Link("dhcpcsvc")]
lib Libdhcpcsvc
  fun DhcpRequestParams = DhcpRequestParams(
    Flags : UInt32,   # DWORD
    Reserved : Void*,   # void* in/out
    AdapterName : UInt16*,   # LPWSTR
    ClassId : DHCPCAPI_CLASSID*,   # DHCPCAPI_CLASSID* in/out
    SendParams : DHCPCAPI_PARAMS_ARRAY,   # DHCPCAPI_PARAMS_ARRAY
    RecdParams : DHCPCAPI_PARAMS_ARRAY,   # DHCPCAPI_PARAMS_ARRAY
    Buffer : UInt8*,   # BYTE* out
    pSize : UInt32*,   # DWORD* in/out
    RequestIdStr : UInt16*   # LPWSTR
  ) : 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 DhcpRequestParamsNative = Uint32 Function(Uint32, Pointer<Void>, Pointer<Utf16>, Pointer<Void>, DHCPCAPI_PARAMS_ARRAY, DHCPCAPI_PARAMS_ARRAY, Pointer<Uint8>, Pointer<Uint32>, Pointer<Utf16>);
typedef DhcpRequestParamsDart = int Function(int, Pointer<Void>, Pointer<Utf16>, Pointer<Void>, int, int, Pointer<Uint8>, Pointer<Uint32>, Pointer<Utf16>);
final DhcpRequestParams = DynamicLibrary.open('dhcpcsvc.dll')
    .lookupFunction<DhcpRequestParamsNative, DhcpRequestParamsDart>('DhcpRequestParams');
// Flags : DWORD -> Uint32
// Reserved : void* in/out -> Pointer<Void>
// AdapterName : LPWSTR -> Pointer<Utf16>
// ClassId : DHCPCAPI_CLASSID* in/out -> Pointer<Void>
// SendParams : DHCPCAPI_PARAMS_ARRAY -> DHCPCAPI_PARAMS_ARRAY
// RecdParams : DHCPCAPI_PARAMS_ARRAY -> DHCPCAPI_PARAMS_ARRAY
// Buffer : BYTE* out -> Pointer<Uint8>
// pSize : DWORD* in/out -> Pointer<Uint32>
// RequestIdStr : LPWSTR -> Pointer<Utf16>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function DhcpRequestParams(
  Flags: DWORD;   // DWORD
  Reserved: Pointer;   // void* in/out
  AdapterName: PWideChar;   // LPWSTR
  ClassId: Pointer;   // DHCPCAPI_CLASSID* in/out
  SendParams: DHCPCAPI_PARAMS_ARRAY;   // DHCPCAPI_PARAMS_ARRAY
  RecdParams: DHCPCAPI_PARAMS_ARRAY;   // DHCPCAPI_PARAMS_ARRAY
  Buffer: Pointer;   // BYTE* out
  pSize: Pointer;   // DWORD* in/out
  RequestIdStr: PWideChar   // LPWSTR
): DWORD; stdcall;
  external 'dhcpcsvc.dll' name 'DhcpRequestParams';

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

foreign import stdcall safe "DhcpRequestParams"
  c_DhcpRequestParams :: Word32 -> Ptr () -> CWString -> Ptr () -> DHCPCAPI_PARAMS_ARRAY -> DHCPCAPI_PARAMS_ARRAY -> Ptr Word8 -> Ptr Word32 -> CWString -> IO Word32
-- Flags : DWORD -> Word32
-- Reserved : void* in/out -> Ptr ()
-- AdapterName : LPWSTR -> CWString
-- ClassId : DHCPCAPI_CLASSID* in/out -> Ptr ()
-- SendParams : DHCPCAPI_PARAMS_ARRAY -> DHCPCAPI_PARAMS_ARRAY
-- RecdParams : DHCPCAPI_PARAMS_ARRAY -> DHCPCAPI_PARAMS_ARRAY
-- Buffer : BYTE* out -> Ptr Word8
-- pSize : DWORD* in/out -> Ptr Word32
-- RequestIdStr : LPWSTR -> CWString
-- 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。
-- ※値渡し構造体は GHC FFI で直接渡せません。Ptr で渡すラッパ(C側)経由にしてください。

open Ctypes
open Foreign

let dhcprequestparams =
  foreign "DhcpRequestParams"
    (uint32_t @-> (ptr void) @-> (ptr uint16_t) @-> (ptr void) @-> DHCPCAPI_PARAMS_ARRAY @-> DHCPCAPI_PARAMS_ARRAY @-> (ptr uint8_t) @-> (ptr uint32_t) @-> (ptr uint16_t) @-> returning uint32_t)
(* Flags : DWORD -> uint32_t *)
(* Reserved : void* in/out -> (ptr void) *)
(* AdapterName : LPWSTR -> (ptr uint16_t) *)
(* ClassId : DHCPCAPI_CLASSID* in/out -> (ptr void) *)
(* SendParams : DHCPCAPI_PARAMS_ARRAY -> DHCPCAPI_PARAMS_ARRAY *)
(* RecdParams : DHCPCAPI_PARAMS_ARRAY -> DHCPCAPI_PARAMS_ARRAY *)
(* Buffer : BYTE* out -> (ptr uint8_t) *)
(* pSize : DWORD* in/out -> (ptr uint32_t) *)
(* RequestIdStr : LPWSTR -> (ptr uint16_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 dhcpcsvc (t "dhcpcsvc.dll"))
(cffi:use-foreign-library dhcpcsvc)

(cffi:defcfun ("DhcpRequestParams" dhcp-request-params :convention :stdcall) :uint32
  (flags :uint32)   ; DWORD
  (reserved :pointer)   ; void* in/out
  (adapter-name (:string :encoding :utf-16le))   ; LPWSTR
  (class-id :pointer)   ; DHCPCAPI_CLASSID* in/out
  (send-params (:struct dhcpcapi-params-array))   ; DHCPCAPI_PARAMS_ARRAY
  (recd-params (:struct dhcpcapi-params-array))   ; DHCPCAPI_PARAMS_ARRAY
  (buffer :pointer)   ; BYTE* out
  (p-size :pointer)   ; DWORD* in/out
  (request-id-str (:string :encoding :utf-16le)))   ; LPWSTR
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $DhcpRequestParams = Win32::API::More->new('dhcpcsvc',
    'DWORD DhcpRequestParams(DWORD Flags, LPVOID Reserved, LPCWSTR AdapterName, LPVOID ClassId, LPVOID SendParams, LPVOID RecdParams, LPVOID Buffer, LPVOID pSize, LPCWSTR RequestIdStr)');
# my $ret = $DhcpRequestParams->Call($Flags, $Reserved, $AdapterName, $ClassId, $SendParams, $RecdParams, $Buffer, $pSize, $RequestIdStr);
# Flags : DWORD -> DWORD
# Reserved : void* in/out -> LPVOID
# AdapterName : LPWSTR -> LPCWSTR
# ClassId : DHCPCAPI_CLASSID* in/out -> LPVOID
# SendParams : DHCPCAPI_PARAMS_ARRAY -> LPVOID
# RecdParams : DHCPCAPI_PARAMS_ARRAY -> LPVOID
# Buffer : BYTE* out -> LPVOID
# pSize : DWORD* in/out -> LPVOID
# RequestIdStr : LPWSTR -> LPCWSTR
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。

DhcpRequestParams

シグネチャ

パラメーター

各言語での呼び出し定義

関連項目