ホーム › System.DeploymentServices › PxeDhcpv6GetVendorOptionValue

PxeDhcpv6GetVendorOptionValue

関数

DHCPv6パケットから指定ベンダー固有オプションの値を取得する。

DLLWDSPXE.dll呼出規約winapi対応OSwindows8.0

シグネチャ

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

DWORD PxeDhcpv6GetVendorOptionValue(
    void* pPacket,
    DWORD uPacketLen,
    DWORD dwEnterpriseNumber,
    WORD wOption,
    DWORD uInstance,
    WORD* pwOptionLen,   // optional
    void** ppOptionValue   // optional
);

パラメーター

名前	型	方向	説明
pPacket	void*	in	ベンダーオプションを取得する対象のDHCPv6パケットへのポインタ。
uPacketLen	DWORD	in	パケットの長さ(バイト単位)。
dwEnterpriseNumber	DWORD	in	ベンダーを識別するIANA企業番号。
wOption	WORD	in	取得するベンダー固有オプションのタイプ番号。
uInstance	DWORD	in	同一オプションが複数ある場合の取得インスタンス番号(1始まり)。
pwOptionLen	WORD*	outoptional	取得したオプション値の長さを受け取るWORDポインタ。
ppOptionValue	void**	outoptional	オプション値先頭を指すポインタを受け取る。

戻り値の型: DWORD

各言語での呼び出し定義

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

DWORD PxeDhcpv6GetVendorOptionValue(
    void* pPacket,
    DWORD uPacketLen,
    DWORD dwEnterpriseNumber,
    WORD wOption,
    DWORD uInstance,
    WORD* pwOptionLen,   // optional
    void** ppOptionValue   // optional
);

[DllImport("WDSPXE.dll", ExactSpelling = true)]
static extern uint PxeDhcpv6GetVendorOptionValue(
    IntPtr pPacket,   // void*
    uint uPacketLen,   // DWORD
    uint dwEnterpriseNumber,   // DWORD
    ushort wOption,   // WORD
    uint uInstance,   // DWORD
    IntPtr pwOptionLen,   // WORD* optional, out
    IntPtr ppOptionValue   // void** optional, out
);

<DllImport("WDSPXE.dll", ExactSpelling:=True)>
Public Shared Function PxeDhcpv6GetVendorOptionValue(
    pPacket As IntPtr,   ' void*
    uPacketLen As UInteger,   ' DWORD
    dwEnterpriseNumber As UInteger,   ' DWORD
    wOption As UShort,   ' WORD
    uInstance As UInteger,   ' DWORD
    pwOptionLen As IntPtr,   ' WORD* optional, out
    ppOptionValue As IntPtr   ' void** optional, out
) As UInteger
End Function

' pPacket : void*
' uPacketLen : DWORD
' dwEnterpriseNumber : DWORD
' wOption : WORD
' uInstance : DWORD
' pwOptionLen : WORD* optional, out
' ppOptionValue : void** optional, out
Declare PtrSafe Function PxeDhcpv6GetVendorOptionValue Lib "wdspxe" ( _
    ByVal pPacket As LongPtr, _
    ByVal uPacketLen As Long, _
    ByVal dwEnterpriseNumber As Long, _
    ByVal wOption As Integer, _
    ByVal uInstance As Long, _
    ByVal pwOptionLen As LongPtr, _
    ByVal ppOptionValue 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

PxeDhcpv6GetVendorOptionValue = ctypes.windll.wdspxe.PxeDhcpv6GetVendorOptionValue
PxeDhcpv6GetVendorOptionValue.restype = wintypes.DWORD
PxeDhcpv6GetVendorOptionValue.argtypes = [
    ctypes.POINTER(None),  # pPacket : void*
    wintypes.DWORD,  # uPacketLen : DWORD
    wintypes.DWORD,  # dwEnterpriseNumber : DWORD
    ctypes.c_ushort,  # wOption : WORD
    wintypes.DWORD,  # uInstance : DWORD
    ctypes.POINTER(ctypes.c_ushort),  # pwOptionLen : WORD* optional, out
    ctypes.c_void_p,  # ppOptionValue : void** optional, out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WDSPXE.dll')
PxeDhcpv6GetVendorOptionValue = Fiddle::Function.new(
  lib['PxeDhcpv6GetVendorOptionValue'],
  [
    Fiddle::TYPE_VOIDP,  # pPacket : void*
    -Fiddle::TYPE_INT,  # uPacketLen : DWORD
    -Fiddle::TYPE_INT,  # dwEnterpriseNumber : DWORD
    -Fiddle::TYPE_SHORT,  # wOption : WORD
    -Fiddle::TYPE_INT,  # uInstance : DWORD
    Fiddle::TYPE_VOIDP,  # pwOptionLen : WORD* optional, out
    Fiddle::TYPE_VOIDP,  # ppOptionValue : void** optional, out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "wdspxe")]
extern "system" {
    fn PxeDhcpv6GetVendorOptionValue(
        pPacket: *mut (),  // void*
        uPacketLen: u32,  // DWORD
        dwEnterpriseNumber: u32,  // DWORD
        wOption: u16,  // WORD
        uInstance: u32,  // DWORD
        pwOptionLen: *mut u16,  // WORD* optional, out
        ppOptionValue: *mut *mut ()  // void** optional, out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WDSPXE.dll")]
public static extern uint PxeDhcpv6GetVendorOptionValue(IntPtr pPacket, uint uPacketLen, uint dwEnterpriseNumber, ushort wOption, uint uInstance, IntPtr pwOptionLen, IntPtr ppOptionValue);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WDSPXE_PxeDhcpv6GetVendorOptionValue' -Namespace Win32 -PassThru
# $api::PxeDhcpv6GetVendorOptionValue(pPacket, uPacketLen, dwEnterpriseNumber, wOption, uInstance, pwOptionLen, ppOptionValue)

#uselib "WDSPXE.dll"
#func global PxeDhcpv6GetVendorOptionValue "PxeDhcpv6GetVendorOptionValue" sptr, sptr, sptr, sptr, sptr, sptr, sptr
; PxeDhcpv6GetVendorOptionValue pPacket, uPacketLen, dwEnterpriseNumber, wOption, uInstance, varptr(pwOptionLen), ppOptionValue   ; 戻り値は stat
; pPacket : void* -> "sptr"
; uPacketLen : DWORD -> "sptr"
; dwEnterpriseNumber : DWORD -> "sptr"
; wOption : WORD -> "sptr"
; uInstance : DWORD -> "sptr"
; pwOptionLen : WORD* optional, out -> "sptr"
; ppOptionValue : void** optional, 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 "WDSPXE.dll"
#cfunc global PxeDhcpv6GetVendorOptionValue "PxeDhcpv6GetVendorOptionValue" sptr, int, int, int, int, var, sptr
; res = PxeDhcpv6GetVendorOptionValue(pPacket, uPacketLen, dwEnterpriseNumber, wOption, uInstance, pwOptionLen, ppOptionValue)
; pPacket : void* -> "sptr"
; uPacketLen : DWORD -> "int"
; dwEnterpriseNumber : DWORD -> "int"
; wOption : WORD -> "int"
; uInstance : DWORD -> "int"
; pwOptionLen : WORD* optional, out -> "var"
; ppOptionValue : void** optional, out -> "sptr"
; ※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 "WDSPXE.dll"
#cfunc global PxeDhcpv6GetVendorOptionValue "PxeDhcpv6GetVendorOptionValue" sptr, int, int, int, int, sptr, sptr
; res = PxeDhcpv6GetVendorOptionValue(pPacket, uPacketLen, dwEnterpriseNumber, wOption, uInstance, varptr(pwOptionLen), ppOptionValue)
; pPacket : void* -> "sptr"
; uPacketLen : DWORD -> "int"
; dwEnterpriseNumber : DWORD -> "int"
; wOption : WORD -> "int"
; uInstance : DWORD -> "int"
; pwOptionLen : WORD* optional, out -> "sptr"
; ppOptionValue : void** optional, 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 PxeDhcpv6GetVendorOptionValue(void* pPacket, DWORD uPacketLen, DWORD dwEnterpriseNumber, WORD wOption, DWORD uInstance, WORD* pwOptionLen, void** ppOptionValue)
#uselib "WDSPXE.dll"
#cfunc global PxeDhcpv6GetVendorOptionValue "PxeDhcpv6GetVendorOptionValue" intptr, int, int, int, int, var, intptr
; res = PxeDhcpv6GetVendorOptionValue(pPacket, uPacketLen, dwEnterpriseNumber, wOption, uInstance, pwOptionLen, ppOptionValue)
; pPacket : void* -> "intptr"
; uPacketLen : DWORD -> "int"
; dwEnterpriseNumber : DWORD -> "int"
; wOption : WORD -> "int"
; uInstance : DWORD -> "int"
; pwOptionLen : WORD* optional, out -> "var"
; ppOptionValue : void** optional, out -> "intptr"
; ※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 PxeDhcpv6GetVendorOptionValue(void* pPacket, DWORD uPacketLen, DWORD dwEnterpriseNumber, WORD wOption, DWORD uInstance, WORD* pwOptionLen, void** ppOptionValue)
#uselib "WDSPXE.dll"
#cfunc global PxeDhcpv6GetVendorOptionValue "PxeDhcpv6GetVendorOptionValue" intptr, int, int, int, int, intptr, intptr
; res = PxeDhcpv6GetVendorOptionValue(pPacket, uPacketLen, dwEnterpriseNumber, wOption, uInstance, varptr(pwOptionLen), ppOptionValue)
; pPacket : void* -> "intptr"
; uPacketLen : DWORD -> "int"
; dwEnterpriseNumber : DWORD -> "int"
; wOption : WORD -> "int"
; uInstance : DWORD -> "int"
; pwOptionLen : WORD* optional, out -> "intptr"
; ppOptionValue : void** optional, 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 (
	wdspxe = windows.NewLazySystemDLL("WDSPXE.dll")
	procPxeDhcpv6GetVendorOptionValue = wdspxe.NewProc("PxeDhcpv6GetVendorOptionValue")
)

// pPacket (void*), uPacketLen (DWORD), dwEnterpriseNumber (DWORD), wOption (WORD), uInstance (DWORD), pwOptionLen (WORD* optional, out), ppOptionValue (void** optional, out)
r1, _, err := procPxeDhcpv6GetVendorOptionValue.Call(
	uintptr(pPacket),
	uintptr(uPacketLen),
	uintptr(dwEnterpriseNumber),
	uintptr(wOption),
	uintptr(uInstance),
	uintptr(pwOptionLen),
	uintptr(ppOptionValue),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function PxeDhcpv6GetVendorOptionValue(
  pPacket: Pointer;   // void*
  uPacketLen: DWORD;   // DWORD
  dwEnterpriseNumber: DWORD;   // DWORD
  wOption: Word;   // WORD
  uInstance: DWORD;   // DWORD
  pwOptionLen: Pointer;   // WORD* optional, out
  ppOptionValue: Pointer   // void** optional, out
): DWORD; stdcall;
  external 'WDSPXE.dll' name 'PxeDhcpv6GetVendorOptionValue';

result := DllCall("WDSPXE\PxeDhcpv6GetVendorOptionValue"
    , "Ptr", pPacket   ; void*
    , "UInt", uPacketLen   ; DWORD
    , "UInt", dwEnterpriseNumber   ; DWORD
    , "UShort", wOption   ; WORD
    , "UInt", uInstance   ; DWORD
    , "Ptr", pwOptionLen   ; WORD* optional, out
    , "Ptr", ppOptionValue   ; void** optional, out
    , "UInt")   ; return: DWORD

●PxeDhcpv6GetVendorOptionValue(pPacket, uPacketLen, dwEnterpriseNumber, wOption, uInstance, pwOptionLen, ppOptionValue) = DLL("WDSPXE.dll", "dword PxeDhcpv6GetVendorOptionValue(void*, dword, dword, int, dword, void*, void*)")
# 呼び出し: PxeDhcpv6GetVendorOptionValue(pPacket, uPacketLen, dwEnterpriseNumber, wOption, uInstance, pwOptionLen, ppOptionValue)
# pPacket : void* -> "void*"
# uPacketLen : DWORD -> "dword"
# dwEnterpriseNumber : DWORD -> "dword"
# wOption : WORD -> "int"
# uInstance : DWORD -> "dword"
# pwOptionLen : WORD* optional, out -> "void*"
# ppOptionValue : void** optional, 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 "wdspxe" fn PxeDhcpv6GetVendorOptionValue(
    pPacket: ?*anyopaque, // void*
    uPacketLen: u32, // DWORD
    dwEnterpriseNumber: u32, // DWORD
    wOption: u16, // WORD
    uInstance: u32, // DWORD
    pwOptionLen: [*c]u16, // WORD* optional, out
    ppOptionValue: ?*anyopaque // void** optional, out
) callconv(std.os.windows.WINAPI) u32;

proc PxeDhcpv6GetVendorOptionValue(
    pPacket: pointer,  # void*
    uPacketLen: uint32,  # DWORD
    dwEnterpriseNumber: uint32,  # DWORD
    wOption: uint16,  # WORD
    uInstance: uint32,  # DWORD
    pwOptionLen: ptr uint16,  # WORD* optional, out
    ppOptionValue: pointer  # void** optional, out
): uint32 {.importc: "PxeDhcpv6GetVendorOptionValue", stdcall, dynlib: "WDSPXE.dll".}

pragma(lib, "wdspxe");
extern(Windows)
uint PxeDhcpv6GetVendorOptionValue(
    void* pPacket,   // void*
    uint uPacketLen,   // DWORD
    uint dwEnterpriseNumber,   // DWORD
    ushort wOption,   // WORD
    uint uInstance,   // DWORD
    ushort* pwOptionLen,   // WORD* optional, out
    void** ppOptionValue   // void** optional, out
);

ccall((:PxeDhcpv6GetVendorOptionValue, "WDSPXE.dll"), stdcall, UInt32,
      (Ptr{Cvoid}, UInt32, UInt32, UInt16, UInt32, Ptr{UInt16}, Ptr{Cvoid}),
      pPacket, uPacketLen, dwEnterpriseNumber, wOption, uInstance, pwOptionLen, ppOptionValue)
# pPacket : void* -> Ptr{Cvoid}
# uPacketLen : DWORD -> UInt32
# dwEnterpriseNumber : DWORD -> UInt32
# wOption : WORD -> UInt16
# uInstance : DWORD -> UInt32
# pwOptionLen : WORD* optional, out -> Ptr{UInt16}
# ppOptionValue : void** optional, out -> Ptr{Cvoid}
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
uint32_t PxeDhcpv6GetVendorOptionValue(
    void* pPacket,
    uint32_t uPacketLen,
    uint32_t dwEnterpriseNumber,
    uint16_t wOption,
    uint32_t uInstance,
    uint16_t* pwOptionLen,
    void** ppOptionValue);
]]
local wdspxe = ffi.load("wdspxe")
-- wdspxe.PxeDhcpv6GetVendorOptionValue(pPacket, uPacketLen, dwEnterpriseNumber, wOption, uInstance, pwOptionLen, ppOptionValue)
-- pPacket : void*
-- uPacketLen : DWORD
-- dwEnterpriseNumber : DWORD
-- wOption : WORD
-- uInstance : DWORD
-- pwOptionLen : WORD* optional, out
-- ppOptionValue : void** optional, 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('WDSPXE.dll');
const PxeDhcpv6GetVendorOptionValue = lib.func('__stdcall', 'PxeDhcpv6GetVendorOptionValue', 'uint32_t', ['void *', 'uint32_t', 'uint32_t', 'uint16_t', 'uint32_t', 'uint16_t *', 'void *']);
// PxeDhcpv6GetVendorOptionValue(pPacket, uPacketLen, dwEnterpriseNumber, wOption, uInstance, pwOptionLen, ppOptionValue)
// pPacket : void* -> 'void *'
// uPacketLen : DWORD -> 'uint32_t'
// dwEnterpriseNumber : DWORD -> 'uint32_t'
// wOption : WORD -> 'uint16_t'
// uInstance : DWORD -> 'uint32_t'
// pwOptionLen : WORD* optional, out -> 'uint16_t *'
// ppOptionValue : void** optional, out -> 'void *'
// 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("WDSPXE.dll", {
  PxeDhcpv6GetVendorOptionValue: { parameters: ["pointer", "u32", "u32", "u16", "u32", "pointer", "pointer"], result: "u32" },
});
// lib.symbols.PxeDhcpv6GetVendorOptionValue(pPacket, uPacketLen, dwEnterpriseNumber, wOption, uInstance, pwOptionLen, ppOptionValue)
// pPacket : void* -> "pointer"
// uPacketLen : DWORD -> "u32"
// dwEnterpriseNumber : DWORD -> "u32"
// wOption : WORD -> "u16"
// uInstance : DWORD -> "u32"
// pwOptionLen : WORD* optional, out -> "pointer"
// ppOptionValue : void** optional, 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 PxeDhcpv6GetVendorOptionValue(
    void* pPacket,
    uint32_t uPacketLen,
    uint32_t dwEnterpriseNumber,
    uint16_t wOption,
    uint32_t uInstance,
    uint16_t* pwOptionLen,
    void** ppOptionValue);
C, "WDSPXE.dll");
// $ffi->PxeDhcpv6GetVendorOptionValue(pPacket, uPacketLen, dwEnterpriseNumber, wOption, uInstance, pwOptionLen, ppOptionValue);
// pPacket : void*
// uPacketLen : DWORD
// dwEnterpriseNumber : DWORD
// wOption : WORD
// uInstance : DWORD
// pwOptionLen : WORD* optional, out
// ppOptionValue : void** optional, 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 Wdspxe extends StdCallLibrary {
    Wdspxe INSTANCE = Native.load("wdspxe", Wdspxe.class);
    int PxeDhcpv6GetVendorOptionValue(
        Pointer pPacket,   // void*
        int uPacketLen,   // DWORD
        int dwEnterpriseNumber,   // DWORD
        short wOption,   // WORD
        int uInstance,   // DWORD
        ShortByReference pwOptionLen,   // WORD* optional, out
        Pointer ppOptionValue   // void** optional, out
    );
}

@[Link("wdspxe")]
lib LibWDSPXE
  fun PxeDhcpv6GetVendorOptionValue = PxeDhcpv6GetVendorOptionValue(
    pPacket : Void*,   # void*
    uPacketLen : UInt32,   # DWORD
    dwEnterpriseNumber : UInt32,   # DWORD
    wOption : UInt16,   # WORD
    uInstance : UInt32,   # DWORD
    pwOptionLen : UInt16*,   # WORD* optional, out
    ppOptionValue : Void**   # void** optional, 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 PxeDhcpv6GetVendorOptionValueNative = Uint32 Function(Pointer<Void>, Uint32, Uint32, Uint16, Uint32, Pointer<Uint16>, Pointer<Void>);
typedef PxeDhcpv6GetVendorOptionValueDart = int Function(Pointer<Void>, int, int, int, int, Pointer<Uint16>, Pointer<Void>);
final PxeDhcpv6GetVendorOptionValue = DynamicLibrary.open('WDSPXE.dll')
    .lookupFunction<PxeDhcpv6GetVendorOptionValueNative, PxeDhcpv6GetVendorOptionValueDart>('PxeDhcpv6GetVendorOptionValue');
// pPacket : void* -> Pointer<Void>
// uPacketLen : DWORD -> Uint32
// dwEnterpriseNumber : DWORD -> Uint32
// wOption : WORD -> Uint16
// uInstance : DWORD -> Uint32
// pwOptionLen : WORD* optional, out -> Pointer<Uint16>
// ppOptionValue : void** optional, out -> Pointer<Void>
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function PxeDhcpv6GetVendorOptionValue(
  pPacket: Pointer;   // void*
  uPacketLen: DWORD;   // DWORD
  dwEnterpriseNumber: DWORD;   // DWORD
  wOption: Word;   // WORD
  uInstance: DWORD;   // DWORD
  pwOptionLen: Pointer;   // WORD* optional, out
  ppOptionValue: Pointer   // void** optional, out
): DWORD; stdcall;
  external 'WDSPXE.dll' name 'PxeDhcpv6GetVendorOptionValue';

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

foreign import stdcall safe "PxeDhcpv6GetVendorOptionValue"
  c_PxeDhcpv6GetVendorOptionValue :: Ptr () -> Word32 -> Word32 -> Word16 -> Word32 -> Ptr Word16 -> Ptr () -> IO Word32
-- pPacket : void* -> Ptr ()
-- uPacketLen : DWORD -> Word32
-- dwEnterpriseNumber : DWORD -> Word32
-- wOption : WORD -> Word16
-- uInstance : DWORD -> Word32
-- pwOptionLen : WORD* optional, out -> Ptr Word16
-- ppOptionValue : void** optional, out -> Ptr ()
-- 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 pxedhcpv6getvendoroptionvalue =
  foreign "PxeDhcpv6GetVendorOptionValue"
    ((ptr void) @-> uint32_t @-> uint32_t @-> uint16_t @-> uint32_t @-> (ptr uint16_t) @-> (ptr void) @-> returning uint32_t)
(* pPacket : void* -> (ptr void) *)
(* uPacketLen : DWORD -> uint32_t *)
(* dwEnterpriseNumber : DWORD -> uint32_t *)
(* wOption : WORD -> uint16_t *)
(* uInstance : DWORD -> uint32_t *)
(* pwOptionLen : WORD* optional, out -> (ptr uint16_t) *)
(* ppOptionValue : void** optional, out -> (ptr void) *)
(* 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 wdspxe (t "WDSPXE.dll"))
(cffi:use-foreign-library wdspxe)

(cffi:defcfun ("PxeDhcpv6GetVendorOptionValue" pxe-dhcpv6-get-vendor-option-value :convention :stdcall) :uint32
  (p-packet :pointer)   ; void*
  (u-packet-len :uint32)   ; DWORD
  (dw-enterprise-number :uint32)   ; DWORD
  (w-option :uint16)   ; WORD
  (u-instance :uint32)   ; DWORD
  (pw-option-len :pointer)   ; WORD* optional, out
  (pp-option-value :pointer))   ; void** optional, out
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $PxeDhcpv6GetVendorOptionValue = Win32::API::More->new('WDSPXE',
    'DWORD PxeDhcpv6GetVendorOptionValue(LPVOID pPacket, DWORD uPacketLen, DWORD dwEnterpriseNumber, WORD wOption, DWORD uInstance, LPVOID pwOptionLen, LPVOID ppOptionValue)');
# my $ret = $PxeDhcpv6GetVendorOptionValue->Call($pPacket, $uPacketLen, $dwEnterpriseNumber, $wOption, $uInstance, $pwOptionLen, $ppOptionValue);
# pPacket : void* -> LPVOID
# uPacketLen : DWORD -> DWORD
# dwEnterpriseNumber : DWORD -> DWORD
# wOption : WORD -> WORD
# uInstance : DWORD -> DWORD
# pwOptionLen : WORD* optional, out -> LPVOID
# ppOptionValue : void** optional, out -> LPVOID
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。