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ND_REDIRECT_HEADER

構造体
サイズx64: 40 バイト / x86: 40 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
nd_rd_hdrICMP_MESSAGE8+0+0リダイレクトメッセージのヘッダーを保持するICMP_MESSAGE。
nd_rd_targetIN6_ADDR16+8+8より良い次ホップのIPv6アドレスを保持するIN6_ADDR。
nd_rd_dstIN6_ADDR16+24+24リダイレクト対象の宛先IPv6アドレスを保持するIN6_ADDR。

各言語での定義

#include <windows.h>

// ICMP_HEADER  (x64 4 / x86 4 バイト)
typedef struct ICMP_HEADER {
    BYTE Type;
    BYTE Code;
    WORD Checksum;
} ICMP_HEADER;

// ICMP_MESSAGE  (x64 8 / x86 8 バイト)
typedef struct ICMP_MESSAGE {
    ICMP_HEADER Header;
    _Data_e__Union Data;
} ICMP_MESSAGE;

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

// ND_REDIRECT_HEADER  (x64 40 / x86 40 バイト)
typedef struct ND_REDIRECT_HEADER {
    ICMP_MESSAGE nd_rd_hdr;
    IN6_ADDR nd_rd_target;
    IN6_ADDR nd_rd_dst;
} ND_REDIRECT_HEADER;
using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct ICMP_HEADER
{
    public byte Type;
    public byte Code;
    public ushort Checksum;
}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct ICMP_MESSAGE
{
    public ICMP_HEADER Header;
    public _Data_e__Union Data;
}

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

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct ND_REDIRECT_HEADER
{
    public ICMP_MESSAGE nd_rd_hdr;
    public IN6_ADDR nd_rd_target;
    public IN6_ADDR nd_rd_dst;
}
Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure ICMP_HEADER
    Public Type As Byte
    Public Code As Byte
    Public Checksum As UShort
End Structure

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure ICMP_MESSAGE
    Public Header As ICMP_HEADER
    Public Data As _Data_e__Union
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 ND_REDIRECT_HEADER
    Public nd_rd_hdr As ICMP_MESSAGE
    Public nd_rd_target As IN6_ADDR
    Public nd_rd_dst As IN6_ADDR
End Structure
import ctypes
from ctypes import wintypes

class ICMP_HEADER(ctypes.Structure):
    _fields_ = [
        ("Type", ctypes.c_ubyte),
        ("Code", ctypes.c_ubyte),
        ("Checksum", ctypes.c_ushort),
    ]

class ICMP_MESSAGE(ctypes.Structure):
    _fields_ = [
        ("Header", ICMP_HEADER),
        ("Data", _Data_e__Union),
    ]

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

class ND_REDIRECT_HEADER(ctypes.Structure):
    _fields_ = [
        ("nd_rd_hdr", ICMP_MESSAGE),
        ("nd_rd_target", IN6_ADDR),
        ("nd_rd_dst", IN6_ADDR),
    ]
#[repr(C)]
pub struct ICMP_HEADER {
    pub Type: u8,
    pub Code: u8,
    pub Checksum: u16,
}

#[repr(C)]
pub struct ICMP_MESSAGE {
    pub Header: ICMP_HEADER,
    pub Data: _Data_e__Union,
}

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

#[repr(C)]
pub struct ND_REDIRECT_HEADER {
    pub nd_rd_hdr: ICMP_MESSAGE,
    pub nd_rd_target: IN6_ADDR,
    pub nd_rd_dst: IN6_ADDR,
}
import "golang.org/x/sys/windows"

type ICMP_HEADER struct {
	Type byte
	Code byte
	Checksum uint16
}

type ICMP_MESSAGE struct {
	Header ICMP_HEADER
	Data _Data_e__Union
}

type IN6_ADDR struct {
	u _u_e__Union
}

type ND_REDIRECT_HEADER struct {
	nd_rd_hdr ICMP_MESSAGE
	nd_rd_target IN6_ADDR
	nd_rd_dst IN6_ADDR
}
type
  ICMP_HEADER = record
    Type: Byte;
    Code: Byte;
    Checksum: Word;
  end;

  ICMP_MESSAGE = record
    Header: ICMP_HEADER;
    Data: _Data_e__Union;
  end;

  IN6_ADDR = record
    u: _u_e__Union;
  end;

  ND_REDIRECT_HEADER = record
    nd_rd_hdr: ICMP_MESSAGE;
    nd_rd_target: IN6_ADDR;
    nd_rd_dst: IN6_ADDR;
  end;
const ICMP_HEADER = extern struct {
    Type: u8,
    Code: u8,
    Checksum: u16,
};

const ICMP_MESSAGE = extern struct {
    Header: ICMP_HEADER,
    Data: _Data_e__Union,
};

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

const ND_REDIRECT_HEADER = extern struct {
    nd_rd_hdr: ICMP_MESSAGE,
    nd_rd_target: IN6_ADDR,
    nd_rd_dst: IN6_ADDR,
};
type
  ICMP_HEADER {.bycopy.} = object
    Type: uint8
    Code: uint8
    Checksum: uint16

  ICMP_MESSAGE {.bycopy.} = object
    Header: ICMP_HEADER
    Data: _Data_e__Union

  IN6_ADDR {.bycopy.} = object
    u: _u_e__Union

  ND_REDIRECT_HEADER {.bycopy.} = object
    nd_rd_hdr: ICMP_MESSAGE
    nd_rd_target: IN6_ADDR
    nd_rd_dst: IN6_ADDR
struct ICMP_HEADER
{
    ubyte Type;
    ubyte Code;
    ushort Checksum;
}

struct ICMP_MESSAGE
{
    ICMP_HEADER Header;
    _Data_e__Union Data;
}

struct IN6_ADDR
{
    _u_e__Union u;
}

struct ND_REDIRECT_HEADER
{
    ICMP_MESSAGE nd_rd_hdr;
    IN6_ADDR nd_rd_target;
    IN6_ADDR nd_rd_dst;
}

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。(x64 レイアウト)
; ND_REDIRECT_HEADER 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)
; nd_rd_hdr : ICMP_MESSAGE (+0, 8byte)  varptr(st)+0 を基点に操作(8byte:入れ子/配列)
; nd_rd_target : IN6_ADDR (+8, 16byte)  varptr(st)+8 を基点に操作(16byte:入れ子/配列)
; nd_rd_dst : IN6_ADDR (+24, 16byte)  varptr(st)+24 を基点に操作(16byte:入れ子/配列)
; ※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。
; ※GUID・入れ子構造体はデフォルト型でないため、依存する #defstruct を先に定義(下記に同梱)。
#defstruct global ICMP_HEADER
    #field byte Type
    #field byte Code
    #field short Checksum
#endstruct

#defstruct global ICMP_MESSAGE
    #field ICMP_HEADER Header
    #field byte Data 4
#endstruct

#defstruct global IN6_ADDR
    #field byte u 16
#endstruct

#defstruct global ND_REDIRECT_HEADER
    #field ICMP_MESSAGE nd_rd_hdr
    #field IN6_ADDR nd_rd_target
    #field IN6_ADDR nd_rd_dst
#endstruct

stdim st, ND_REDIRECT_HEADER        ; NSTRUCT 変数を確保