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IP_ADDRESS_PREFIX

構造体
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サイズx64: 40 バイト / x86: 32 バイト

サイズ=各フィールドのバイト数(x64/x86 で異なる場合は x64/x86 と併記)。x64/x86 列=フィールドのバイトオフセット(HSPで dupptr / lpoke / wpoke 等に使用)。

フィールド

フィールド型サイズx64x86説明
PrefixSOCKADDR_INET32/28+0+0IPアドレスプレフィックス(ネットワーク部)を保持するSOCKADDR_INET共用体である。
PrefixLengthBYTE1+32+28プレフィックスの長さ(ビット数)である。

各言語での定義

#include <windows.h>

// IN_ADDR  (x64 8 / x86 4 バイト)
typedef struct IN_ADDR {
    _S_un_e__Union S_un;
} IN_ADDR;

// SOCKADDR_IN  (x64 24 / x86 16 バイト)
typedef struct SOCKADDR_IN {
    ADDRESS_FAMILY sin_family;
    WORD sin_port;
    IN_ADDR sin_addr;
    CHAR sin_zero[8];
} SOCKADDR_IN;

// IN6_ADDR  (x64 16 / x86 16 バイト)
typedef struct IN6_ADDR {
    _u_e__Union u;
} IN6_ADDR;

// SOCKADDR_IN6  (x64 32 / x86 28 バイト)
typedef struct SOCKADDR_IN6 {
    ADDRESS_FAMILY sin6_family;
    WORD sin6_port;
    DWORD sin6_flowinfo;
    IN6_ADDR sin6_addr;
    _Anonymous_e__Union Anonymous;
} SOCKADDR_IN6;

// SOCKADDR_INET  (x64 32 / x86 28 バイト)
typedef struct SOCKADDR_INET {
    SOCKADDR_IN Ipv4;
    SOCKADDR_IN6 Ipv6;
    ADDRESS_FAMILY si_family;
} SOCKADDR_INET;

// IP_ADDRESS_PREFIX  (x64 40 / x86 32 バイト)
typedef struct IP_ADDRESS_PREFIX {
    SOCKADDR_INET Prefix;
    BYTE PrefixLength;
} IP_ADDRESS_PREFIX;
using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct IN_ADDR
{
    public _S_un_e__Union S_un;
}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct SOCKADDR_IN
{
    public ushort sin_family;
    public ushort sin_port;
    public IN_ADDR sin_addr;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 8)] public sbyte[] sin_zero;
}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct IN6_ADDR
{
    public _u_e__Union u;
}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct SOCKADDR_IN6
{
    public ushort sin6_family;
    public ushort sin6_port;
    public uint sin6_flowinfo;
    public IN6_ADDR sin6_addr;
    public _Anonymous_e__Union Anonymous;
}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct SOCKADDR_INET
{
    public SOCKADDR_IN Ipv4;
    public SOCKADDR_IN6 Ipv6;
    public ushort si_family;
}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct IP_ADDRESS_PREFIX
{
    public SOCKADDR_INET Prefix;
    public byte PrefixLength;
}
Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure IN_ADDR
    Public S_un As _S_un_e__Union
End Structure

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure SOCKADDR_IN
    Public sin_family As UShort
    Public sin_port As UShort
    Public sin_addr As IN_ADDR
    <MarshalAs(UnmanagedType.ByValArray, SizeConst:=8)> Public sin_zero() As SByte
End Structure

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure IN6_ADDR
    Public u As _u_e__Union
End Structure

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure SOCKADDR_IN6
    Public sin6_family As UShort
    Public sin6_port As UShort
    Public sin6_flowinfo As UInteger
    Public sin6_addr As IN6_ADDR
    Public Anonymous As _Anonymous_e__Union
End Structure

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure SOCKADDR_INET
    Public Ipv4 As SOCKADDR_IN
    Public Ipv6 As SOCKADDR_IN6
    Public si_family As UShort
End Structure

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure IP_ADDRESS_PREFIX
    Public Prefix As SOCKADDR_INET
    Public PrefixLength As Byte
End Structure
import ctypes
from ctypes import wintypes

class IN_ADDR(ctypes.Structure):
    _fields_ = [
        ("S_un", _S_un_e__Union),
    ]

class SOCKADDR_IN(ctypes.Structure):
    _fields_ = [
        ("sin_family", ctypes.c_ushort),
        ("sin_port", ctypes.c_ushort),
        ("sin_addr", IN_ADDR),
        ("sin_zero", ctypes.c_byte * 8),
    ]

class IN6_ADDR(ctypes.Structure):
    _fields_ = [
        ("u", _u_e__Union),
    ]

class SOCKADDR_IN6(ctypes.Structure):
    _fields_ = [
        ("sin6_family", ctypes.c_ushort),
        ("sin6_port", ctypes.c_ushort),
        ("sin6_flowinfo", wintypes.DWORD),
        ("sin6_addr", IN6_ADDR),
        ("Anonymous", _Anonymous_e__Union),
    ]

class SOCKADDR_INET(ctypes.Structure):
    _fields_ = [
        ("Ipv4", SOCKADDR_IN),
        ("Ipv6", SOCKADDR_IN6),
        ("si_family", ctypes.c_ushort),
    ]

class IP_ADDRESS_PREFIX(ctypes.Structure):
    _fields_ = [
        ("Prefix", SOCKADDR_INET),
        ("PrefixLength", ctypes.c_ubyte),
    ]
#[repr(C)]
pub struct IN_ADDR {
    pub S_un: _S_un_e__Union,
}

#[repr(C)]
pub struct SOCKADDR_IN {
    pub sin_family: u16,
    pub sin_port: u16,
    pub sin_addr: IN_ADDR,
    pub sin_zero: [i8; 8],
}

#[repr(C)]
pub struct IN6_ADDR {
    pub u: _u_e__Union,
}

#[repr(C)]
pub struct SOCKADDR_IN6 {
    pub sin6_family: u16,
    pub sin6_port: u16,
    pub sin6_flowinfo: u32,
    pub sin6_addr: IN6_ADDR,
    pub Anonymous: _Anonymous_e__Union,
}

#[repr(C)]
pub struct SOCKADDR_INET {
    pub Ipv4: SOCKADDR_IN,
    pub Ipv6: SOCKADDR_IN6,
    pub si_family: u16,
}

#[repr(C)]
pub struct IP_ADDRESS_PREFIX {
    pub Prefix: SOCKADDR_INET,
    pub PrefixLength: u8,
}
import "golang.org/x/sys/windows"

type IN_ADDR struct {
	S_un _S_un_e__Union
}

type SOCKADDR_IN struct {
	sin_family uint16
	sin_port uint16
	sin_addr IN_ADDR
	sin_zero [8]int8
}

type IN6_ADDR struct {
	u _u_e__Union
}

type SOCKADDR_IN6 struct {
	sin6_family uint16
	sin6_port uint16
	sin6_flowinfo uint32
	sin6_addr IN6_ADDR
	Anonymous _Anonymous_e__Union
}

type SOCKADDR_INET struct {
	Ipv4 SOCKADDR_IN
	Ipv6 SOCKADDR_IN6
	si_family uint16
}

type IP_ADDRESS_PREFIX struct {
	Prefix SOCKADDR_INET
	PrefixLength byte
}
type
  IN_ADDR = record
    S_un: _S_un_e__Union;
  end;

  SOCKADDR_IN = record
    sin_family: Word;
    sin_port: Word;
    sin_addr: IN_ADDR;
    sin_zero: array[0..7] of Shortint;
  end;

  IN6_ADDR = record
    u: _u_e__Union;
  end;

  SOCKADDR_IN6 = record
    sin6_family: Word;
    sin6_port: Word;
    sin6_flowinfo: DWORD;
    sin6_addr: IN6_ADDR;
    Anonymous: _Anonymous_e__Union;
  end;

  SOCKADDR_INET = record
    Ipv4: SOCKADDR_IN;
    Ipv6: SOCKADDR_IN6;
    si_family: Word;
  end;

  IP_ADDRESS_PREFIX = record
    Prefix: SOCKADDR_INET;
    PrefixLength: Byte;
  end;
const IN_ADDR = extern struct {
    S_un: _S_un_e__Union,
};

const SOCKADDR_IN = extern struct {
    sin_family: u16,
    sin_port: u16,
    sin_addr: IN_ADDR,
    sin_zero: [8]i8,
};

const IN6_ADDR = extern struct {
    u: _u_e__Union,
};

const SOCKADDR_IN6 = extern struct {
    sin6_family: u16,
    sin6_port: u16,
    sin6_flowinfo: u32,
    sin6_addr: IN6_ADDR,
    Anonymous: _Anonymous_e__Union,
};

const SOCKADDR_INET = extern struct {
    Ipv4: SOCKADDR_IN,
    Ipv6: SOCKADDR_IN6,
    si_family: u16,
};

const IP_ADDRESS_PREFIX = extern struct {
    Prefix: SOCKADDR_INET,
    PrefixLength: u8,
};
type
  IN_ADDR {.bycopy.} = object
    S_un: _S_un_e__Union

  SOCKADDR_IN {.bycopy.} = object
    sin_family: uint16
    sin_port: uint16
    sin_addr: IN_ADDR
    sin_zero: array[8, int8]

  IN6_ADDR {.bycopy.} = object
    u: _u_e__Union

  SOCKADDR_IN6 {.bycopy.} = object
    sin6_family: uint16
    sin6_port: uint16
    sin6_flowinfo: uint32
    sin6_addr: IN6_ADDR
    Anonymous: _Anonymous_e__Union

  SOCKADDR_INET {.bycopy.} = object
    Ipv4: SOCKADDR_IN
    Ipv6: SOCKADDR_IN6
    si_family: uint16

  IP_ADDRESS_PREFIX {.bycopy.} = object
    Prefix: SOCKADDR_INET
    PrefixLength: uint8
struct IN_ADDR
{
    _S_un_e__Union S_un;
}

struct SOCKADDR_IN
{
    ushort sin_family;
    ushort sin_port;
    IN_ADDR sin_addr;
    byte[8] sin_zero;
}

struct IN6_ADDR
{
    _u_e__Union u;
}

struct SOCKADDR_IN6
{
    ushort sin6_family;
    ushort sin6_port;
    uint sin6_flowinfo;
    IN6_ADDR sin6_addr;
    _Anonymous_e__Union Anonymous;
}

struct SOCKADDR_INET
{
    SOCKADDR_IN Ipv4;
    SOCKADDR_IN6 Ipv6;
    ushort si_family;
}

struct IP_ADDRESS_PREFIX
{
    SOCKADDR_INET Prefix;
    ubyte PrefixLength;
}

HSP用 定義

HSP3.7/3.8 は構造体機能が無いため4byte整数配列(dim)+peek/poke で操作(32/64bitでサイズ・位置が異なる場合はタブで分割)。IronHSP は NSTRUCT(#defstruct/stdim/->)で32/64bit共通。

; HSP3.7/3.8 は構造体機能が無いため、4byte整数の配列変数で操作します。(x86 レイアウト)
; IP_ADDRESS_PREFIX サイズ: 32 バイト(x86)
dim st, 8    ; 4byte整数×8(構造体サイズ 32 / 4 切り上げ)
; Prefix : SOCKADDR_INET (+0, 28byte)  varptr(st)+0 を基点に操作(28byte:入れ子/配列)
; PrefixLength : BYTE (+28, 1byte)  poke st,28,値  /  値 = peek(st,28)
; ※4byte境界の整数は添字 st.N(N=オフセット/4)で読み書き可。それ以外は peek/poke 系を使用。
; HSP3.7/3.8 は構造体機能が無いため、4byte整数の配列変数で操作します。(x64 レイアウト)
; IP_ADDRESS_PREFIX サイズ: 40 バイト(x64)
dim st, 10    ; 4byte整数×10(構造体サイズ 40 / 4 切り上げ)
; Prefix : SOCKADDR_INET (+0, 32byte)  varptr(st)+0 を基点に操作(32byte:入れ子/配列)
; PrefixLength : BYTE (+32, 1byte)  poke st,32,値  /  値 = peek(st,32)
; ※4byte境界の整数は添字 st.N(N=オフセット/4)で読み書き可。それ以外は peek/poke 系を使用。
; IronHSP は NSTRUCT(構造体)をサポート。32bit/64bit どちらでも同じコードで動作します。
#defstruct global IP_ADDRESS_PREFIX
    #field byte Prefix 32
    #field byte PrefixLength
#endstruct

stdim st, IP_ADDRESS_PREFIX        ; NSTRUCT 変数を確保
st->PrefixLength = 100
mes "PrefixLength=" + st->PrefixLength
; ※union フィールドは byte 列で確保(NSTRUCT は union 非対応)。必要に応じ手動でアクセス。