GetAcceptExSockaddrs

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

void GetAcceptExSockaddrs(
    void* lpOutputBuffer,
    DWORD dwReceiveDataLength,
    DWORD dwLocalAddressLength,
    DWORD dwRemoteAddressLength,
    SOCKADDR** LocalSockaddr,
    INT* LocalSockaddrLength,
    SOCKADDR** RemoteSockaddr,
    INT* RemoteSockaddrLength
);

<DllImport("MSWSOCK.dll", ExactSpelling:=True)>
Public Shared Sub GetAcceptExSockaddrs(
    lpOutputBuffer As IntPtr,   ' void*
    dwReceiveDataLength As UInteger,   ' DWORD
    dwLocalAddressLength As UInteger,   ' DWORD
    dwRemoteAddressLength As UInteger,   ' DWORD
    LocalSockaddr As IntPtr,   ' SOCKADDR** out
    <Out> ByRef LocalSockaddrLength As Integer,   ' INT* out
    RemoteSockaddr As IntPtr,   ' SOCKADDR** out
    <Out> ByRef RemoteSockaddrLength As Integer   ' INT* out
)
End Sub

' lpOutputBuffer : void*
' dwReceiveDataLength : DWORD
' dwLocalAddressLength : DWORD
' dwRemoteAddressLength : DWORD
' LocalSockaddr : SOCKADDR** out
' LocalSockaddrLength : INT* out
' RemoteSockaddr : SOCKADDR** out
' RemoteSockaddrLength : INT* out
Declare PtrSafe Sub GetAcceptExSockaddrs Lib "mswsock" ( _
    ByVal lpOutputBuffer As LongPtr, _
    ByVal dwReceiveDataLength As Long, _
    ByVal dwLocalAddressLength As Long, _
    ByVal dwRemoteAddressLength As Long, _
    ByVal LocalSockaddr As LongPtr, _
    ByRef LocalSockaddrLength As Long, _
    ByVal RemoteSockaddr As LongPtr, _
    ByRef RemoteSockaddrLength As Long)
' VBA7前提(PtrSafe)。32bit Office では LongPtr→Long。Integer=16bit / Long=32bit / LongLong=64bit。

import ctypes
from ctypes import wintypes

GetAcceptExSockaddrs = ctypes.windll.mswsock.GetAcceptExSockaddrs
GetAcceptExSockaddrs.restype = None
GetAcceptExSockaddrs.argtypes = [
    ctypes.POINTER(None),  # lpOutputBuffer : void*
    wintypes.DWORD,  # dwReceiveDataLength : DWORD
    wintypes.DWORD,  # dwLocalAddressLength : DWORD
    wintypes.DWORD,  # dwRemoteAddressLength : DWORD
    ctypes.c_void_p,  # LocalSockaddr : SOCKADDR** out
    ctypes.POINTER(ctypes.c_int),  # LocalSockaddrLength : INT* out
    ctypes.c_void_p,  # RemoteSockaddr : SOCKADDR** out
    ctypes.POINTER(ctypes.c_int),  # RemoteSockaddrLength : INT* out
]

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('MSWSOCK.dll')
GetAcceptExSockaddrs = Fiddle::Function.new(
  lib['GetAcceptExSockaddrs'],
  [
    Fiddle::TYPE_VOIDP,  # lpOutputBuffer : void*
    -Fiddle::TYPE_INT,  # dwReceiveDataLength : DWORD
    -Fiddle::TYPE_INT,  # dwLocalAddressLength : DWORD
    -Fiddle::TYPE_INT,  # dwRemoteAddressLength : DWORD
    Fiddle::TYPE_VOIDP,  # LocalSockaddr : SOCKADDR** out
    Fiddle::TYPE_VOIDP,  # LocalSockaddrLength : INT* out
    Fiddle::TYPE_VOIDP,  # RemoteSockaddr : SOCKADDR** out
    Fiddle::TYPE_VOIDP,  # RemoteSockaddrLength : INT* out
  ],
  Fiddle::TYPE_VOID)

#[link(name = "mswsock")]
extern "system" {
    fn GetAcceptExSockaddrs(
        lpOutputBuffer: *mut (),  // void*
        dwReceiveDataLength: u32,  // DWORD
        dwLocalAddressLength: u32,  // DWORD
        dwRemoteAddressLength: u32,  // DWORD
        LocalSockaddr: *mut *mut SOCKADDR,  // SOCKADDR** out
        LocalSockaddrLength: *mut i32,  // INT* out
        RemoteSockaddr: *mut *mut SOCKADDR,  // SOCKADDR** out
        RemoteSockaddrLength: *mut i32  // INT* out
    );
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("MSWSOCK.dll")]
public static extern void GetAcceptExSockaddrs(IntPtr lpOutputBuffer, uint dwReceiveDataLength, uint dwLocalAddressLength, uint dwRemoteAddressLength, IntPtr LocalSockaddr, out int LocalSockaddrLength, IntPtr RemoteSockaddr, out int RemoteSockaddrLength);
"@
$api = Add-Type -MemberDefinition $sig -Name 'MSWSOCK_GetAcceptExSockaddrs' -Namespace Win32 -PassThru
# $api::GetAcceptExSockaddrs(lpOutputBuffer, dwReceiveDataLength, dwLocalAddressLength, dwRemoteAddressLength, LocalSockaddr, LocalSockaddrLength, RemoteSockaddr, RemoteSockaddrLength)

#uselib "MSWSOCK.dll"
#func global GetAcceptExSockaddrs "GetAcceptExSockaddrs" sptr, sptr, sptr, sptr, sptr, sptr, sptr, sptr
; GetAcceptExSockaddrs lpOutputBuffer, dwReceiveDataLength, dwLocalAddressLength, dwRemoteAddressLength, varptr(LocalSockaddr), varptr(LocalSockaddrLength), varptr(RemoteSockaddr), varptr(RemoteSockaddrLength)
; lpOutputBuffer : void* -> "sptr"
; dwReceiveDataLength : DWORD -> "sptr"
; dwLocalAddressLength : DWORD -> "sptr"
; dwRemoteAddressLength : DWORD -> "sptr"
; LocalSockaddr : SOCKADDR** out -> "sptr"
; LocalSockaddrLength : INT* out -> "sptr"
; RemoteSockaddr : SOCKADDR** out -> "sptr"
; RemoteSockaddrLength : INT* out -> "sptr"

#uselib "MSWSOCK.dll"
#func global GetAcceptExSockaddrs "GetAcceptExSockaddrs" sptr, int, int, int, var, var, var, var
; GetAcceptExSockaddrs lpOutputBuffer, dwReceiveDataLength, dwLocalAddressLength, dwRemoteAddressLength, LocalSockaddr, LocalSockaddrLength, RemoteSockaddr, RemoteSockaddrLength
; lpOutputBuffer : void* -> "sptr"
; dwReceiveDataLength : DWORD -> "int"
; dwLocalAddressLength : DWORD -> "int"
; dwRemoteAddressLength : DWORD -> "int"
; LocalSockaddr : SOCKADDR** out -> "var"
; LocalSockaddrLength : INT* out -> "var"
; RemoteSockaddr : SOCKADDR** out -> "var"
; RemoteSockaddrLength : INT* 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。

; void GetAcceptExSockaddrs(void* lpOutputBuffer, DWORD dwReceiveDataLength, DWORD dwLocalAddressLength, DWORD dwRemoteAddressLength, SOCKADDR** LocalSockaddr, INT* LocalSockaddrLength, SOCKADDR** RemoteSockaddr, INT* RemoteSockaddrLength)
#uselib "MSWSOCK.dll"
#func global GetAcceptExSockaddrs "GetAcceptExSockaddrs" intptr, int, int, int, var, var, var, var
; GetAcceptExSockaddrs lpOutputBuffer, dwReceiveDataLength, dwLocalAddressLength, dwRemoteAddressLength, LocalSockaddr, LocalSockaddrLength, RemoteSockaddr, RemoteSockaddrLength
; lpOutputBuffer : void* -> "intptr"
; dwReceiveDataLength : DWORD -> "int"
; dwLocalAddressLength : DWORD -> "int"
; dwRemoteAddressLength : DWORD -> "int"
; LocalSockaddr : SOCKADDR** out -> "var"
; LocalSockaddrLength : INT* out -> "var"
; RemoteSockaddr : SOCKADDR** out -> "var"
; RemoteSockaddrLength : INT* 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 (
	mswsock = windows.NewLazySystemDLL("MSWSOCK.dll")
	procGetAcceptExSockaddrs = mswsock.NewProc("GetAcceptExSockaddrs")
)

// lpOutputBuffer (void*), dwReceiveDataLength (DWORD), dwLocalAddressLength (DWORD), dwRemoteAddressLength (DWORD), LocalSockaddr (SOCKADDR** out), LocalSockaddrLength (INT* out), RemoteSockaddr (SOCKADDR** out), RemoteSockaddrLength (INT* out)
r1, _, err := procGetAcceptExSockaddrs.Call(
	uintptr(lpOutputBuffer),
	uintptr(dwReceiveDataLength),
	uintptr(dwLocalAddressLength),
	uintptr(dwRemoteAddressLength),
	uintptr(LocalSockaddr),
	uintptr(LocalSockaddrLength),
	uintptr(RemoteSockaddr),
	uintptr(RemoteSockaddrLength),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // void

procedure GetAcceptExSockaddrs(
  lpOutputBuffer: Pointer;   // void*
  dwReceiveDataLength: DWORD;   // DWORD
  dwLocalAddressLength: DWORD;   // DWORD
  dwRemoteAddressLength: DWORD;   // DWORD
  LocalSockaddr: Pointer;   // SOCKADDR** out
  LocalSockaddrLength: Pointer;   // INT* out
  RemoteSockaddr: Pointer;   // SOCKADDR** out
  RemoteSockaddrLength: Pointer   // INT* out
); stdcall;
  external 'MSWSOCK.dll' name 'GetAcceptExSockaddrs';

result := DllCall("MSWSOCK\GetAcceptExSockaddrs"
    , "Ptr", lpOutputBuffer   ; void*
    , "UInt", dwReceiveDataLength   ; DWORD
    , "UInt", dwLocalAddressLength   ; DWORD
    , "UInt", dwRemoteAddressLength   ; DWORD
    , "Ptr", LocalSockaddr   ; SOCKADDR** out
    , "Ptr", LocalSockaddrLength   ; INT* out
    , "Ptr", RemoteSockaddr   ; SOCKADDR** out
    , "Ptr", RemoteSockaddrLength   ; INT* out
    , "Int")   ; return: void

●GetAcceptExSockaddrs(lpOutputBuffer, dwReceiveDataLength, dwLocalAddressLength, dwRemoteAddressLength, LocalSockaddr, LocalSockaddrLength, RemoteSockaddr, RemoteSockaddrLength) = DLL("MSWSOCK.dll", "int GetAcceptExSockaddrs(void*, dword, dword, dword, void*, void*, void*, void*)")
# 呼び出し: GetAcceptExSockaddrs(lpOutputBuffer, dwReceiveDataLength, dwLocalAddressLength, dwRemoteAddressLength, LocalSockaddr, LocalSockaddrLength, RemoteSockaddr, RemoteSockaddrLength)
# lpOutputBuffer : void* -> "void*"
# dwReceiveDataLength : DWORD -> "dword"
# dwLocalAddressLength : DWORD -> "dword"
# dwRemoteAddressLength : DWORD -> "dword"
# LocalSockaddr : SOCKADDR** out -> "void*"
# LocalSockaddrLength : INT* out -> "void*"
# RemoteSockaddr : SOCKADDR** out -> "void*"
# RemoteSockaddrLength : INT* 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)。