PxeDhcpv6ParseRelayForw

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

DWORD PxeDhcpv6ParseRelayForw(
    void* pRelayForwPacket,
    DWORD uRelayForwPacketLen,
    PXE_DHCPV6_NESTED_RELAY_MESSAGE* pRelayMessages,
    DWORD nRelayMessages,
    DWORD* pnRelayMessages,
    BYTE** ppInnerPacket,
    DWORD* pcbInnerPacket
);

<DllImport("WDSPXE.dll", ExactSpelling:=True)>
Public Shared Function PxeDhcpv6ParseRelayForw(
    pRelayForwPacket As IntPtr,   ' void*
    uRelayForwPacketLen As UInteger,   ' DWORD
    pRelayMessages As IntPtr,   ' PXE_DHCPV6_NESTED_RELAY_MESSAGE* out
    nRelayMessages As UInteger,   ' DWORD
    <Out> ByRef pnRelayMessages As UInteger,   ' DWORD* out
    ppInnerPacket As IntPtr,   ' BYTE** out
    <Out> ByRef pcbInnerPacket As UInteger   ' DWORD* out
) As UInteger
End Function

' pRelayForwPacket : void*
' uRelayForwPacketLen : DWORD
' pRelayMessages : PXE_DHCPV6_NESTED_RELAY_MESSAGE* out
' nRelayMessages : DWORD
' pnRelayMessages : DWORD* out
' ppInnerPacket : BYTE** out
' pcbInnerPacket : DWORD* out
Declare PtrSafe Function PxeDhcpv6ParseRelayForw Lib "wdspxe" ( _
    ByVal pRelayForwPacket As LongPtr, _
    ByVal uRelayForwPacketLen As Long, _
    ByVal pRelayMessages As LongPtr, _
    ByVal nRelayMessages As Long, _
    ByRef pnRelayMessages As Long, _
    ByVal ppInnerPacket As LongPtr, _
    ByRef pcbInnerPacket 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

PxeDhcpv6ParseRelayForw = ctypes.windll.wdspxe.PxeDhcpv6ParseRelayForw
PxeDhcpv6ParseRelayForw.restype = wintypes.DWORD
PxeDhcpv6ParseRelayForw.argtypes = [
    ctypes.POINTER(None),  # pRelayForwPacket : void*
    wintypes.DWORD,  # uRelayForwPacketLen : DWORD
    ctypes.c_void_p,  # pRelayMessages : PXE_DHCPV6_NESTED_RELAY_MESSAGE* out
    wintypes.DWORD,  # nRelayMessages : DWORD
    ctypes.POINTER(wintypes.DWORD),  # pnRelayMessages : DWORD* out
    ctypes.c_void_p,  # ppInnerPacket : BYTE** out
    ctypes.POINTER(wintypes.DWORD),  # pcbInnerPacket : DWORD* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WDSPXE.dll')
PxeDhcpv6ParseRelayForw = Fiddle::Function.new(
  lib['PxeDhcpv6ParseRelayForw'],
  [
    Fiddle::TYPE_VOIDP,  # pRelayForwPacket : void*
    -Fiddle::TYPE_INT,  # uRelayForwPacketLen : DWORD
    Fiddle::TYPE_VOIDP,  # pRelayMessages : PXE_DHCPV6_NESTED_RELAY_MESSAGE* out
    -Fiddle::TYPE_INT,  # nRelayMessages : DWORD
    Fiddle::TYPE_VOIDP,  # pnRelayMessages : DWORD* out
    Fiddle::TYPE_VOIDP,  # ppInnerPacket : BYTE** out
    Fiddle::TYPE_VOIDP,  # pcbInnerPacket : DWORD* out
  ],
  -Fiddle::TYPE_INT)

#[link(name = "wdspxe")]
extern "system" {
    fn PxeDhcpv6ParseRelayForw(
        pRelayForwPacket: *mut (),  // void*
        uRelayForwPacketLen: u32,  // DWORD
        pRelayMessages: *mut PXE_DHCPV6_NESTED_RELAY_MESSAGE,  // PXE_DHCPV6_NESTED_RELAY_MESSAGE* out
        nRelayMessages: u32,  // DWORD
        pnRelayMessages: *mut u32,  // DWORD* out
        ppInnerPacket: *mut *mut u8,  // BYTE** out
        pcbInnerPacket: *mut u32  // DWORD* out
    ) -> u32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WDSPXE.dll")]
public static extern uint PxeDhcpv6ParseRelayForw(IntPtr pRelayForwPacket, uint uRelayForwPacketLen, IntPtr pRelayMessages, uint nRelayMessages, out uint pnRelayMessages, IntPtr ppInnerPacket, out uint pcbInnerPacket);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WDSPXE_PxeDhcpv6ParseRelayForw' -Namespace Win32 -PassThru
# $api::PxeDhcpv6ParseRelayForw(pRelayForwPacket, uRelayForwPacketLen, pRelayMessages, nRelayMessages, pnRelayMessages, ppInnerPacket, pcbInnerPacket)

#uselib "WDSPXE.dll"
#func global PxeDhcpv6ParseRelayForw "PxeDhcpv6ParseRelayForw" sptr, sptr, sptr, sptr, sptr, sptr, sptr
; PxeDhcpv6ParseRelayForw pRelayForwPacket, uRelayForwPacketLen, varptr(pRelayMessages), nRelayMessages, varptr(pnRelayMessages), varptr(ppInnerPacket), varptr(pcbInnerPacket)   ; 戻り値は stat
; pRelayForwPacket : void* -> "sptr"
; uRelayForwPacketLen : DWORD -> "sptr"
; pRelayMessages : PXE_DHCPV6_NESTED_RELAY_MESSAGE* out -> "sptr"
; nRelayMessages : DWORD -> "sptr"
; pnRelayMessages : DWORD* out -> "sptr"
; ppInnerPacket : BYTE** out -> "sptr"
; pcbInnerPacket : 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。

#uselib "WDSPXE.dll"
#cfunc global PxeDhcpv6ParseRelayForw "PxeDhcpv6ParseRelayForw" sptr, int, var, int, var, var, var
; res = PxeDhcpv6ParseRelayForw(pRelayForwPacket, uRelayForwPacketLen, pRelayMessages, nRelayMessages, pnRelayMessages, ppInnerPacket, pcbInnerPacket)
; pRelayForwPacket : void* -> "sptr"
; uRelayForwPacketLen : DWORD -> "int"
; pRelayMessages : PXE_DHCPV6_NESTED_RELAY_MESSAGE* out -> "var"
; nRelayMessages : DWORD -> "int"
; pnRelayMessages : DWORD* out -> "var"
; ppInnerPacket : BYTE** out -> "var"
; pcbInnerPacket : 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 PxeDhcpv6ParseRelayForw(void* pRelayForwPacket, DWORD uRelayForwPacketLen, PXE_DHCPV6_NESTED_RELAY_MESSAGE* pRelayMessages, DWORD nRelayMessages, DWORD* pnRelayMessages, BYTE** ppInnerPacket, DWORD* pcbInnerPacket)
#uselib "WDSPXE.dll"
#cfunc global PxeDhcpv6ParseRelayForw "PxeDhcpv6ParseRelayForw" intptr, int, var, int, var, var, var
; res = PxeDhcpv6ParseRelayForw(pRelayForwPacket, uRelayForwPacketLen, pRelayMessages, nRelayMessages, pnRelayMessages, ppInnerPacket, pcbInnerPacket)
; pRelayForwPacket : void* -> "intptr"
; uRelayForwPacketLen : DWORD -> "int"
; pRelayMessages : PXE_DHCPV6_NESTED_RELAY_MESSAGE* out -> "var"
; nRelayMessages : DWORD -> "int"
; pnRelayMessages : DWORD* out -> "var"
; ppInnerPacket : BYTE** out -> "var"
; pcbInnerPacket : 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。

import (
	"golang.org/x/sys/windows"
	"unsafe"
)

var (
	wdspxe = windows.NewLazySystemDLL("WDSPXE.dll")
	procPxeDhcpv6ParseRelayForw = wdspxe.NewProc("PxeDhcpv6ParseRelayForw")
)

// pRelayForwPacket (void*), uRelayForwPacketLen (DWORD), pRelayMessages (PXE_DHCPV6_NESTED_RELAY_MESSAGE* out), nRelayMessages (DWORD), pnRelayMessages (DWORD* out), ppInnerPacket (BYTE** out), pcbInnerPacket (DWORD* out)
r1, _, err := procPxeDhcpv6ParseRelayForw.Call(
	uintptr(pRelayForwPacket),
	uintptr(uRelayForwPacketLen),
	uintptr(pRelayMessages),
	uintptr(nRelayMessages),
	uintptr(pnRelayMessages),
	uintptr(ppInnerPacket),
	uintptr(pcbInnerPacket),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // DWORD

function PxeDhcpv6ParseRelayForw(
  pRelayForwPacket: Pointer;   // void*
  uRelayForwPacketLen: DWORD;   // DWORD
  pRelayMessages: Pointer;   // PXE_DHCPV6_NESTED_RELAY_MESSAGE* out
  nRelayMessages: DWORD;   // DWORD
  pnRelayMessages: Pointer;   // DWORD* out
  ppInnerPacket: Pointer;   // BYTE** out
  pcbInnerPacket: Pointer   // DWORD* out
): DWORD; stdcall;
  external 'WDSPXE.dll' name 'PxeDhcpv6ParseRelayForw';

result := DllCall("WDSPXE\PxeDhcpv6ParseRelayForw"
    , "Ptr", pRelayForwPacket   ; void*
    , "UInt", uRelayForwPacketLen   ; DWORD
    , "Ptr", pRelayMessages   ; PXE_DHCPV6_NESTED_RELAY_MESSAGE* out
    , "UInt", nRelayMessages   ; DWORD
    , "Ptr", pnRelayMessages   ; DWORD* out
    , "Ptr", ppInnerPacket   ; BYTE** out
    , "Ptr", pcbInnerPacket   ; DWORD* out
    , "UInt")   ; return: DWORD

●PxeDhcpv6ParseRelayForw(pRelayForwPacket, uRelayForwPacketLen, pRelayMessages, nRelayMessages, pnRelayMessages, ppInnerPacket, pcbInnerPacket) = DLL("WDSPXE.dll", "dword PxeDhcpv6ParseRelayForw(void*, dword, void*, dword, void*, void*, void*)")
# 呼び出し: PxeDhcpv6ParseRelayForw(pRelayForwPacket, uRelayForwPacketLen, pRelayMessages, nRelayMessages, pnRelayMessages, ppInnerPacket, pcbInnerPacket)
# pRelayForwPacket : void* -> "void*"
# uRelayForwPacketLen : DWORD -> "dword"
# pRelayMessages : PXE_DHCPV6_NESTED_RELAY_MESSAGE* out -> "void*"
# nRelayMessages : DWORD -> "dword"
# pnRelayMessages : DWORD* out -> "void*"
# ppInnerPacket : BYTE** out -> "void*"
# pcbInnerPacket : 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)。