WSAPROTOCOL_INFOA

using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct WSAPROTOCOLCHAIN
{
    public int ChainLen;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 7)] public uint[] ChainEntries;
}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct WSAPROTOCOL_INFOA
{
    public uint dwServiceFlags1;
    public uint dwServiceFlags2;
    public uint dwServiceFlags3;
    public uint dwServiceFlags4;
    public uint dwProviderFlags;
    public Guid ProviderId;
    public uint dwCatalogEntryId;
    public WSAPROTOCOLCHAIN ProtocolChain;
    public int iVersion;
    public int iAddressFamily;
    public int iMaxSockAddr;
    public int iMinSockAddr;
    public int iSocketType;
    public int iProtocol;
    public int iProtocolMaxOffset;
    public int iNetworkByteOrder;
    public int iSecurityScheme;
    public uint dwMessageSize;
    public uint dwProviderReserved;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 256)] public sbyte[] szProtocol;
}

Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure WSAPROTOCOLCHAIN
    Public ChainLen As Integer
    <MarshalAs(UnmanagedType.ByValArray, SizeConst:=7)> Public ChainEntries() As UInteger
End Structure

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure WSAPROTOCOL_INFOA
    Public dwServiceFlags1 As UInteger
    Public dwServiceFlags2 As UInteger
    Public dwServiceFlags3 As UInteger
    Public dwServiceFlags4 As UInteger
    Public dwProviderFlags As UInteger
    Public ProviderId As Guid
    Public dwCatalogEntryId As UInteger
    Public ProtocolChain As WSAPROTOCOLCHAIN
    Public iVersion As Integer
    Public iAddressFamily As Integer
    Public iMaxSockAddr As Integer
    Public iMinSockAddr As Integer
    Public iSocketType As Integer
    Public iProtocol As Integer
    Public iProtocolMaxOffset As Integer
    Public iNetworkByteOrder As Integer
    Public iSecurityScheme As Integer
    Public dwMessageSize As UInteger
    Public dwProviderReserved As UInteger
    <MarshalAs(UnmanagedType.ByValArray, SizeConst:=256)> Public szProtocol() As SByte
End Structure

import ctypes
from ctypes import wintypes

class WSAPROTOCOLCHAIN(ctypes.Structure):
    _fields_ = [
        ("ChainLen", ctypes.c_int),
        ("ChainEntries", wintypes.DWORD * 7),
    ]

class WSAPROTOCOL_INFOA(ctypes.Structure):
    _fields_ = [
        ("dwServiceFlags1", wintypes.DWORD),
        ("dwServiceFlags2", wintypes.DWORD),
        ("dwServiceFlags3", wintypes.DWORD),
        ("dwServiceFlags4", wintypes.DWORD),
        ("dwProviderFlags", wintypes.DWORD),
        ("ProviderId", GUID),
        ("dwCatalogEntryId", wintypes.DWORD),
        ("ProtocolChain", WSAPROTOCOLCHAIN),
        ("iVersion", ctypes.c_int),
        ("iAddressFamily", ctypes.c_int),
        ("iMaxSockAddr", ctypes.c_int),
        ("iMinSockAddr", ctypes.c_int),
        ("iSocketType", ctypes.c_int),
        ("iProtocol", ctypes.c_int),
        ("iProtocolMaxOffset", ctypes.c_int),
        ("iNetworkByteOrder", ctypes.c_int),
        ("iSecurityScheme", ctypes.c_int),
        ("dwMessageSize", wintypes.DWORD),
        ("dwProviderReserved", wintypes.DWORD),
        ("szProtocol", ctypes.c_byte * 256),
    ]

#[repr(C)]
pub struct WSAPROTOCOLCHAIN {
    pub ChainLen: i32,
    pub ChainEntries: [u32; 7],
}

#[repr(C)]
pub struct WSAPROTOCOL_INFOA {
    pub dwServiceFlags1: u32,
    pub dwServiceFlags2: u32,
    pub dwServiceFlags3: u32,
    pub dwServiceFlags4: u32,
    pub dwProviderFlags: u32,
    pub ProviderId: GUID,
    pub dwCatalogEntryId: u32,
    pub ProtocolChain: WSAPROTOCOLCHAIN,
    pub iVersion: i32,
    pub iAddressFamily: i32,
    pub iMaxSockAddr: i32,
    pub iMinSockAddr: i32,
    pub iSocketType: i32,
    pub iProtocol: i32,
    pub iProtocolMaxOffset: i32,
    pub iNetworkByteOrder: i32,
    pub iSecurityScheme: i32,
    pub dwMessageSize: u32,
    pub dwProviderReserved: u32,
    pub szProtocol: [i8; 256],
}

import "golang.org/x/sys/windows"

type WSAPROTOCOLCHAIN struct {
	ChainLen int32
	ChainEntries [7]uint32
}

type WSAPROTOCOL_INFOA struct {
	dwServiceFlags1 uint32
	dwServiceFlags2 uint32
	dwServiceFlags3 uint32
	dwServiceFlags4 uint32
	dwProviderFlags uint32
	ProviderId windows.GUID
	dwCatalogEntryId uint32
	ProtocolChain WSAPROTOCOLCHAIN
	iVersion int32
	iAddressFamily int32
	iMaxSockAddr int32
	iMinSockAddr int32
	iSocketType int32
	iProtocol int32
	iProtocolMaxOffset int32
	iNetworkByteOrder int32
	iSecurityScheme int32
	dwMessageSize uint32
	dwProviderReserved uint32
	szProtocol [256]int8
}

type
  WSAPROTOCOLCHAIN = record
    ChainLen: Integer;
    ChainEntries: array[0..6] of DWORD;
  end;

  WSAPROTOCOL_INFOA = record
    dwServiceFlags1: DWORD;
    dwServiceFlags2: DWORD;
    dwServiceFlags3: DWORD;
    dwServiceFlags4: DWORD;
    dwProviderFlags: DWORD;
    ProviderId: TGUID;
    dwCatalogEntryId: DWORD;
    ProtocolChain: WSAPROTOCOLCHAIN;
    iVersion: Integer;
    iAddressFamily: Integer;
    iMaxSockAddr: Integer;
    iMinSockAddr: Integer;
    iSocketType: Integer;
    iProtocol: Integer;
    iProtocolMaxOffset: Integer;
    iNetworkByteOrder: Integer;
    iSecurityScheme: Integer;
    dwMessageSize: DWORD;
    dwProviderReserved: DWORD;
    szProtocol: array[0..255] of Shortint;
  end;

const WSAPROTOCOLCHAIN = extern struct {
    ChainLen: i32,
    ChainEntries: [7]u32,
};

const WSAPROTOCOL_INFOA = extern struct {
    dwServiceFlags1: u32,
    dwServiceFlags2: u32,
    dwServiceFlags3: u32,
    dwServiceFlags4: u32,
    dwProviderFlags: u32,
    ProviderId: GUID,
    dwCatalogEntryId: u32,
    ProtocolChain: WSAPROTOCOLCHAIN,
    iVersion: i32,
    iAddressFamily: i32,
    iMaxSockAddr: i32,
    iMinSockAddr: i32,
    iSocketType: i32,
    iProtocol: i32,
    iProtocolMaxOffset: i32,
    iNetworkByteOrder: i32,
    iSecurityScheme: i32,
    dwMessageSize: u32,
    dwProviderReserved: u32,
    szProtocol: [256]i8,
};

type
  WSAPROTOCOLCHAIN {.bycopy.} = object
    ChainLen: int32
    ChainEntries: array[7, uint32]

  WSAPROTOCOL_INFOA {.bycopy.} = object
    dwServiceFlags1: uint32
    dwServiceFlags2: uint32
    dwServiceFlags3: uint32
    dwServiceFlags4: uint32
    dwProviderFlags: uint32
    ProviderId: GUID
    dwCatalogEntryId: uint32
    ProtocolChain: WSAPROTOCOLCHAIN
    iVersion: int32
    iAddressFamily: int32
    iMaxSockAddr: int32
    iMinSockAddr: int32
    iSocketType: int32
    iProtocol: int32
    iProtocolMaxOffset: int32
    iNetworkByteOrder: int32
    iSecurityScheme: int32
    dwMessageSize: uint32
    dwProviderReserved: uint32
    szProtocol: array[256, int8]

struct WSAPROTOCOLCHAIN
{
    int ChainLen;
    uint[7] ChainEntries;
}

struct WSAPROTOCOL_INFOA
{
    uint dwServiceFlags1;
    uint dwServiceFlags2;
    uint dwServiceFlags3;
    uint dwServiceFlags4;
    uint dwProviderFlags;
    GUID ProviderId;
    uint dwCatalogEntryId;
    WSAPROTOCOLCHAIN ProtocolChain;
    int iVersion;
    int iAddressFamily;
    int iMaxSockAddr;
    int iMinSockAddr;
    int iSocketType;
    int iProtocol;
    int iProtocolMaxOffset;
    int iNetworkByteOrder;
    int iSecurityScheme;
    uint dwMessageSize;
    uint dwProviderReserved;
    byte[256] szProtocol;
}