NVMEOF_CONNECT_COMMAND

using System;
using System.Runtime.InteropServices;

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct NVME_SGL_DESC
{
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 15)] public byte[] Reserved0;
    public _Identifier_e__Union Identifier;
}

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct NVMEOF_CONNECT_COMMAND
{
    public byte OPC;
    public byte Reserved0;
    public ushort CID;
    public byte FCTYPE;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 19)] public byte[] Reserved1;
    public NVME_SGL_DESC SGL1;
    public ushort RECFMT;
    public ushort QID;
    public ushort SQSIZE;
    public _CATTR_e__Union CATTR;
    public byte Reserved2;
    public uint KATO;
    [MarshalAs(UnmanagedType.ByValArray, SizeConst = 12)] public byte[] Reserved3;
}

Imports System.Runtime.InteropServices

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure NVME_SGL_DESC
    <MarshalAs(UnmanagedType.ByValArray, SizeConst:=15)> Public Reserved0() As Byte
    Public Identifier As _Identifier_e__Union
End Structure

<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Unicode)>
Public Structure NVMEOF_CONNECT_COMMAND
    Public OPC As Byte
    Public Reserved0 As Byte
    Public CID As UShort
    Public FCTYPE As Byte
    <MarshalAs(UnmanagedType.ByValArray, SizeConst:=19)> Public Reserved1() As Byte
    Public SGL1 As NVME_SGL_DESC
    Public RECFMT As UShort
    Public QID As UShort
    Public SQSIZE As UShort
    Public CATTR As _CATTR_e__Union
    Public Reserved2 As Byte
    Public KATO As UInteger
    <MarshalAs(UnmanagedType.ByValArray, SizeConst:=12)> Public Reserved3() As Byte
End Structure

import ctypes
from ctypes import wintypes

class NVME_SGL_DESC(ctypes.Structure):
    _fields_ = [
        ("Reserved0", ctypes.c_ubyte * 15),
        ("Identifier", _Identifier_e__Union),
    ]

class NVMEOF_CONNECT_COMMAND(ctypes.Structure):
    _fields_ = [
        ("OPC", ctypes.c_ubyte),
        ("Reserved0", ctypes.c_ubyte),
        ("CID", ctypes.c_ushort),
        ("FCTYPE", ctypes.c_ubyte),
        ("Reserved1", ctypes.c_ubyte * 19),
        ("SGL1", NVME_SGL_DESC),
        ("RECFMT", ctypes.c_ushort),
        ("QID", ctypes.c_ushort),
        ("SQSIZE", ctypes.c_ushort),
        ("CATTR", _CATTR_e__Union),
        ("Reserved2", ctypes.c_ubyte),
        ("KATO", wintypes.DWORD),
        ("Reserved3", ctypes.c_ubyte * 12),
    ]

#[repr(C)]
pub struct NVME_SGL_DESC {
    pub Reserved0: [u8; 15],
    pub Identifier: _Identifier_e__Union,
}

#[repr(C)]
pub struct NVMEOF_CONNECT_COMMAND {
    pub OPC: u8,
    pub Reserved0: u8,
    pub CID: u16,
    pub FCTYPE: u8,
    pub Reserved1: [u8; 19],
    pub SGL1: NVME_SGL_DESC,
    pub RECFMT: u16,
    pub QID: u16,
    pub SQSIZE: u16,
    pub CATTR: _CATTR_e__Union,
    pub Reserved2: u8,
    pub KATO: u32,
    pub Reserved3: [u8; 12],
}

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

type NVME_SGL_DESC struct {
	Reserved0 [15]byte
	Identifier _Identifier_e__Union
}

type NVMEOF_CONNECT_COMMAND struct {
	OPC byte
	Reserved0 byte
	CID uint16
	FCTYPE byte
	Reserved1 [19]byte
	SGL1 NVME_SGL_DESC
	RECFMT uint16
	QID uint16
	SQSIZE uint16
	CATTR _CATTR_e__Union
	Reserved2 byte
	KATO uint32
	Reserved3 [12]byte
}

type
  NVME_SGL_DESC = record
    Reserved0: array[0..14] of Byte;
    Identifier: _Identifier_e__Union;
  end;

  NVMEOF_CONNECT_COMMAND = record
    OPC: Byte;
    Reserved0: Byte;
    CID: Word;
    FCTYPE: Byte;
    Reserved1: array[0..18] of Byte;
    SGL1: NVME_SGL_DESC;
    RECFMT: Word;
    QID: Word;
    SQSIZE: Word;
    CATTR: _CATTR_e__Union;
    Reserved2: Byte;
    KATO: DWORD;
    Reserved3: array[0..11] of Byte;
  end;

const NVME_SGL_DESC = extern struct {
    Reserved0: [15]u8,
    Identifier: _Identifier_e__Union,
};

const NVMEOF_CONNECT_COMMAND = extern struct {
    OPC: u8,
    Reserved0: u8,
    CID: u16,
    FCTYPE: u8,
    Reserved1: [19]u8,
    SGL1: NVME_SGL_DESC,
    RECFMT: u16,
    QID: u16,
    SQSIZE: u16,
    CATTR: _CATTR_e__Union,
    Reserved2: u8,
    KATO: u32,
    Reserved3: [12]u8,
};

type
  NVME_SGL_DESC {.bycopy.} = object
    Reserved0: array[15, uint8]
    Identifier: _Identifier_e__Union

  NVMEOF_CONNECT_COMMAND {.bycopy.} = object
    OPC: uint8
    Reserved0: uint8
    CID: uint16
    FCTYPE: uint8
    Reserved1: array[19, uint8]
    SGL1: NVME_SGL_DESC
    RECFMT: uint16
    QID: uint16
    SQSIZE: uint16
    CATTR: _CATTR_e__Union
    Reserved2: uint8
    KATO: uint32
    Reserved3: array[12, uint8]

struct NVME_SGL_DESC
{
    ubyte[15] Reserved0;
    _Identifier_e__Union Identifier;
}

struct NVMEOF_CONNECT_COMMAND
{
    ubyte OPC;
    ubyte Reserved0;
    ushort CID;
    ubyte FCTYPE;
    ubyte[19] Reserved1;
    NVME_SGL_DESC SGL1;
    ushort RECFMT;
    ushort QID;
    ushort SQSIZE;
    _CATTR_e__Union CATTR;
    ubyte Reserved2;
    uint KATO;
    ubyte[12] Reserved3;
}