setsockopt

// WS2_32.dll
#include <windows.h>

INT setsockopt(
    SOCKET s,
    INT level,
    INT optname,
    LPCSTR optval,   // optional
    INT optlen
);

<DllImport("WS2_32.dll", SetLastError:=True, ExactSpelling:=True)>
Public Shared Function setsockopt(
    s As UIntPtr,   ' SOCKET
    level As Integer,   ' INT
    optname As Integer,   ' INT
    <MarshalAs(UnmanagedType.LPStr)> optval As String,   ' LPCSTR optional
    optlen As Integer   ' INT
) As Integer
End Function

' s : SOCKET
' level : INT
' optname : INT
' optval : LPCSTR optional
' optlen : INT
Declare PtrSafe Function setsockopt Lib "ws2_32" ( _
    ByVal s As LongPtr, _
    ByVal level As Long, _
    ByVal optname As Long, _
    ByVal optval As String, _
    ByVal optlen 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

setsockopt = ctypes.windll.ws2_32.setsockopt
setsockopt.restype = ctypes.c_int
setsockopt.argtypes = [
    ctypes.c_size_t,  # s : SOCKET
    ctypes.c_int,  # level : INT
    ctypes.c_int,  # optname : INT
    wintypes.LPCSTR,  # optval : LPCSTR optional
    ctypes.c_int,  # optlen : INT
]
# GetLastError: use ctypes.GetLastError() (or ctypes.WinDLL(use_last_error=True))

require 'fiddle'
require 'fiddle/import'

lib = Fiddle.dlopen('WS2_32.dll')
setsockopt = Fiddle::Function.new(
  lib['setsockopt'],
  [
    Fiddle::TYPE_UINTPTR_T,  # s : SOCKET
    Fiddle::TYPE_INT,  # level : INT
    Fiddle::TYPE_INT,  # optname : INT
    Fiddle::TYPE_VOIDP,  # optval : LPCSTR optional
    Fiddle::TYPE_INT,  # optlen : INT
  ],
  Fiddle::TYPE_INT)

#[link(name = "ws2_32")]
extern "system" {
    fn setsockopt(
        s: usize,  // SOCKET
        level: i32,  // INT
        optname: i32,  // INT
        optval: *const u8,  // LPCSTR optional
        optlen: i32  // INT
    ) -> i32;
}
// crates: windows-sys provides ready-made bindings for this API.

$sig = @"
[DllImport("WS2_32.dll", SetLastError = true)]
public static extern int setsockopt(UIntPtr s, int level, int optname, [MarshalAs(UnmanagedType.LPStr)] string optval, int optlen);
"@
$api = Add-Type -MemberDefinition $sig -Name 'WS2_32_setsockopt' -Namespace Win32 -PassThru
# $api::setsockopt(s, level, optname, optval, optlen)

#uselib "WS2_32.dll"
#func global setsockopt "setsockopt" sptr, sptr, sptr, sptr, sptr
; setsockopt s, level, optname, optval, optlen   ; 戻り値は stat
; s : SOCKET -> "sptr"
; level : INT -> "sptr"
; optname : INT -> "sptr"
; optval : LPCSTR optional -> "sptr"
; optlen : INT -> "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 "WS2_32.dll"
#cfunc global setsockopt "setsockopt" sptr, int, int, str, int
; res = setsockopt(s, level, optname, optval, optlen)
; s : SOCKET -> "sptr"
; level : INT -> "int"
; optname : INT -> "int"
; optval : LPCSTR optional -> "str"
; optlen : INT -> "int"

; INT setsockopt(SOCKET s, INT level, INT optname, LPCSTR optval, INT optlen)
#uselib "WS2_32.dll"
#cfunc global setsockopt "setsockopt" intptr, int, int, str, int
; res = setsockopt(s, level, optname, optval, optlen)
; s : SOCKET -> "intptr"
; level : INT -> "int"
; optname : INT -> "int"
; optval : LPCSTR optional -> "str"
; optlen : INT -> "int"

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

var (
	ws2_32 = windows.NewLazySystemDLL("WS2_32.dll")
	procsetsockopt = ws2_32.NewProc("setsockopt")
)

// s (SOCKET), level (INT), optname (INT), optval (LPCSTR optional), optlen (INT)
r1, _, err := procsetsockopt.Call(
	uintptr(s),
	uintptr(level),
	uintptr(optname),
	uintptr(unsafe.Pointer(windows.BytePtrFromString(optval))),
	uintptr(optlen),
)
_ = err  // syscall.Errno (valid when the call sets last-error)
_ = r1   // INT

function setsockopt(
  s: NativeUInt;   // SOCKET
  level: Integer;   // INT
  optname: Integer;   // INT
  optval: PAnsiChar;   // LPCSTR optional
  optlen: Integer   // INT
): Integer; stdcall;
  external 'WS2_32.dll' name 'setsockopt';

result := DllCall("WS2_32\setsockopt"
    , "UPtr", s   ; SOCKET
    , "Int", level   ; INT
    , "Int", optname   ; INT
    , "AStr", optval   ; LPCSTR optional
    , "Int", optlen   ; INT
    , "Int")   ; return: INT

●setsockopt(s, level, optname, optval, optlen) = DLL("WS2_32.dll", "int setsockopt(int, int, int, char*, int)")
# 呼び出し: setsockopt(s, level, optname, optval, optlen)
# s : SOCKET -> "int"
# level : INT -> "int"
# optname : INT -> "int"
# optval : LPCSTR optional -> "char*"
# optlen : INT -> "int"
# 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 "ws2_32" fn setsockopt(
    s: usize, // SOCKET
    level: i32, // INT
    optname: i32, // INT
    optval: [*c]const u8, // LPCSTR optional
    optlen: i32 // INT
) callconv(std.os.windows.WINAPI) i32;

proc setsockopt(
    s: uint,  # SOCKET
    level: int32,  # INT
    optname: int32,  # INT
    optval: cstring,  # LPCSTR optional
    optlen: int32  # INT
): int32 {.importc: "setsockopt", stdcall, dynlib: "WS2_32.dll".}

pragma(lib, "ws2_32");
extern(Windows)
int setsockopt(
    size_t s,   // SOCKET
    int level,   // INT
    int optname,   // INT
    const(char)* optval,   // LPCSTR optional
    int optlen   // INT
);

ccall((:setsockopt, "WS2_32.dll"), stdcall, Int32,
      (Csize_t, Int32, Int32, Cstring, Int32),
      s, level, optname, optval, optlen)
# s : SOCKET -> Csize_t
# level : INT -> Int32
# optname : INT -> Int32
# optval : LPCSTR optional -> Cstring
# optlen : INT -> Int32
# stdcall は 32bit のみ意味を持つ(x64 では無視)。

local ffi = require("ffi")
ffi.cdef[[
int32_t setsockopt(
    uintptr_t s,
    int32_t level,
    int32_t optname,
    const char* optval,
    int32_t optlen);
]]
local ws2_32 = ffi.load("ws2_32")
-- ws2_32.setsockopt(s, level, optname, optval, optlen)
-- s : SOCKET
-- level : INT
-- optname : INT
-- optval : LPCSTR optional
-- optlen : INT
-- 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('WS2_32.dll');
const setsockopt = lib.func('__stdcall', 'setsockopt', 'int32_t', ['uintptr_t', 'int32_t', 'int32_t', 'str', 'int32_t']);
// setsockopt(s, level, optname, optval, optlen)
// s : SOCKET -> 'uintptr_t'
// level : INT -> 'int32_t'
// optname : INT -> 'int32_t'
// optval : LPCSTR optional -> 'str'
// optlen : INT -> 'int32_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("WS2_32.dll", {
  setsockopt: { parameters: ["usize", "i32", "i32", "buffer", "i32"], result: "i32" },
});
// lib.symbols.setsockopt(s, level, optname, optval, optlen)
// s : SOCKET -> "usize"
// level : INT -> "i32"
// optname : INT -> "i32"
// optval : LPCSTR optional -> "buffer"
// optlen : INT -> "i32"
// 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
int32_t setsockopt(
    size_t s,
    int32_t level,
    int32_t optname,
    const char* optval,
    int32_t optlen);
C, "WS2_32.dll");
// $ffi->setsockopt(s, level, optname, optval, optlen);
// s : SOCKET
// level : INT
// optname : INT
// optval : LPCSTR optional
// optlen : INT
// 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 Ws2_32 extends StdCallLibrary {
    Ws2_32 INSTANCE = Native.load("ws2_32", Ws2_32.class);
    int setsockopt(
        long s,   // SOCKET
        int level,   // INT
        int optname,   // INT
        String optval,   // LPCSTR optional
        int optlen   // INT
    );
}

@[Link("ws2_32")]
lib LibWS2_32
  fun setsockopt = setsockopt(
    s : LibC::SizeT,   # SOCKET
    level : Int32,   # INT
    optname : Int32,   # INT
    optval : UInt8*,   # LPCSTR optional
    optlen : Int32   # INT
  ) : Int32
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 setsockoptNative = Int32 Function(UintPtr, Int32, Int32, Pointer<Utf8>, Int32);
typedef setsockoptDart = int Function(int, int, int, Pointer<Utf8>, int);
final setsockopt = DynamicLibrary.open('WS2_32.dll')
    .lookupFunction<setsockoptNative, setsockoptDart>('setsockopt');
// s : SOCKET -> UintPtr
// level : INT -> Int32
// optname : INT -> Int32
// optval : LPCSTR optional -> Pointer<Utf8>
// optlen : INT -> Int32
// 文字列は package:ffi の "...".toNativeUtf16()/toNativeUtf8() で変換。

{$mode objfpc}{$H+}
function setsockopt(
  s: NativeUInt;   // SOCKET
  level: Integer;   // INT
  optname: Integer;   // INT
  optval: PAnsiChar;   // LPCSTR optional
  optlen: Integer   // INT
): Integer; stdcall;
  external 'WS2_32.dll' name 'setsockopt';

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

foreign import stdcall safe "setsockopt"
  c_setsockopt :: CUIntPtr -> Int32 -> Int32 -> CString -> Int32 -> IO Int32
-- s : SOCKET -> CUIntPtr
-- level : INT -> Int32
-- optname : INT -> Int32
-- optval : LPCSTR optional -> CString
-- optlen : INT -> Int32
-- 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 setsockopt =
  foreign "setsockopt"
    (size_t @-> int32_t @-> int32_t @-> string @-> int32_t @-> returning int32_t)
(* s : SOCKET -> size_t *)
(* level : INT -> int32_t *)
(* optname : INT -> int32_t *)
(* optval : LPCSTR optional -> string *)
(* optlen : INT -> int32_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 ws2_32 (t "WS2_32.dll"))
(cffi:use-foreign-library ws2_32)

(cffi:defcfun ("setsockopt" setsockopt :convention :stdcall) :int32
  (s :uint64)   ; SOCKET
  (level :int32)   ; INT
  (optname :int32)   ; INT
  (optval :string)   ; LPCSTR optional
  (optlen :int32))   ; INT
; isize/usize(INT_PTR/SIZE_T)は x64 前提で :int64/:uint64。x86 では :int32/:uint32。

use Win32::API;
my $setsockopt = Win32::API::More->new('WS2_32',
    'int setsockopt(WPARAM s, int level, int optname, LPCSTR optval, int optlen)');
# my $ret = $setsockopt->Call($s, $level, $optname, $optval, $optlen);
# s : SOCKET -> WPARAM
# level : INT -> int
# optname : INT -> int
# optval : LPCSTR optional -> LPCSTR
# optlen : INT -> int
# 値渡し構造体は pack() した文字列、または Win32::API::Struct を使用。