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分類:[C#]
動作環境
・WindowsCE6.0
・.NETcompactframework3.5
CE本体のMACアドレスが取得したく、
Win32APIのGetAdaptersInfoから取得できることがわかったため、
動作確認しているのですが、うまく取得できていない状況です。
CE機にもってくる前に、Win10、C#の環境で
GetAdaptersInfoで正しく動作することを確認した上で、
CE機に持ってきていますが
うまく移植ができていない状況です。
おそらく構造体の定義が間違っていると思っているのですが、
対処方法がわかりません。
知見のある方、お教え頂きますと幸いです。
下記にCE機上のソースコードを貼ります。
ソースコード上にコメント入れてあります。
using System.Runtime.InteropServices;
namespace SmartDeviceProject1
{
public partial class Form1 : Form
{
const int MAX_ADAPTER_DESCRIPTION_LENGTH = 128;
const int MAX_ADAPTER_NAME_LENGTH = 256;
const int MAX_ADAPTER_ADDRESS_LENGTH = 8;
const int ERROR_BUFFER_OVERFLOW = 111;
const int MIB_IF_TYPE_OTHER = 1;
const int MIB_IF_TYPE_ETHERNET = 6;
const int MIB_IF_TYPE_TOKENRING = 9;
const int MIB_IF_TYPE_FDDI = 15;
const int MIB_IF_TYPE_PPP = 23;
const int MIB_IF_TYPE_LOOPBACK = 24;
const int MIB_IF_TYPE_SLIP = 28;
//[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]
//●上記ビルドエラーとなるため、下記のようにCharSet.Unicodeに変更
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct IP_ADDRESS_STRING
{
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 16)]
public string Address;
}
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct IP_ADDR_STRING
{
public IntPtr Next;
public IP_ADDRESS_STRING IpAddress;
public IP_ADDRESS_STRING IpMask;
public Int32 Context;
}
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
public struct IP_ADAPTER_INFO
{
public IntPtr Next;
public Int32 ComboIndex;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = MAX_ADAPTER_NAME_LENGTH + 4)]
public string AdapterName;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = MAX_ADAPTER_DESCRIPTION_LENGTH + 4)]
public string AdapterDescription;
public UInt32 AddressLength;
[MarshalAs(UnmanagedType.ByValArray, SizeConst = MAX_ADAPTER_ADDRESS_LENGTH)]
public byte[] Address;
public Int32 Index;
public UInt32 Type;
public UInt32 DhcpEnabled;
public IntPtr CurrentIpAddress;
public IP_ADDR_STRING IpAddressList;
public IP_ADDR_STRING GatewayList;
public IP_ADDR_STRING DhcpServer;
public bool HaveWins;
public IP_ADDR_STRING PrimaryWinsServer;
public IP_ADDR_STRING SecondaryWinsServer;
public Int32 LeaseObtained;
public Int32 LeaseExpires;
}
//●実機にdllが存在することを確認
[DllImport("iphlpapi.dll", CharSet = CharSet.Unicode)]
//public static extern int GetAdaptersInfo(IntPtr pAdapterInfo, ref Int64 pBufOutLen);
//●CE機ではInt64は扱えないと考え、Int32に変更
public static extern int GetAdaptersInfo(IntPtr pAdapterInfo, ref Int32 pBufOutLen);
public Form1()
{
InitializeComponent();
GetAdapters();
}
private void button1_Click(object sender, EventArgs e)
{
GetAdapters();
}
public static void GetAdapters()
{
//long structSize = Marshal.SizeOf(typeof(IP_ADAPTER_INFO));
//●上記ビルドエラーとなったため、下記のようにintへ変更
int structSize = Marshal.SizeOf(typeof(IP_ADAPTER_INFO));
//IntPtr pArray = Marshal.AllocHGlobal(new IntPtr(structSize));
//●上記ビルドエラーとなったため、下記のようにintへキャスト
IntPtr pArray = Marshal.AllocHGlobal((int)new IntPtr(structSize));
int ret = GetAdaptersInfo(pArray, ref structSize);
if (ret == ERROR_BUFFER_OVERFLOW) // ERROR_BUFFER_OVERFLOW == 111
{
//●実行するとここに来る
// Buffer was too small, reallocate the correct size for the buffer.
pArray = Marshal.ReAllocHGlobal(pArray, new IntPtr(structSize));
ret = GetAdaptersInfo(pArray, ref structSize);
//●retの結果は0になる
} // if
if (ret == 0)
{
// Call Succeeded
IntPtr pEntry = pArray;
do
{
// Retrieve the adapter info from the memory address
IP_ADAPTER_INFO entry = (IP_ADAPTER_INFO)Marshal.PtrToStructure(pEntry, typeof(IP_ADAPTER_INFO));
// ***Do something with the data HERE!***
Console.WriteLine("\n");
Console.WriteLine("Index: {0}", entry.Index.ToString());
// Adapter Type
string tmpString = string.Empty;
//●実機では
// １回目：entry.Type=0x00000000
// ２回目：entry.Type=0x000001e8
switch (entry.Type)
{
case MIB_IF_TYPE_ETHERNET: tmpString = "Ethernet"; break;
case MIB_IF_TYPE_TOKENRING: tmpString = "Token Ring"; break;
case MIB_IF_TYPE_FDDI: tmpString = "FDDI"; break;
case MIB_IF_TYPE_PPP: tmpString = "PPP"; break;
case MIB_IF_TYPE_LOOPBACK: tmpString = "Loopback"; break;
case MIB_IF_TYPE_SLIP: tmpString = "Slip"; break;
default: tmpString = "Other/Unknown"; break;
} // switch
Console.WriteLine("Adapter Type: {0}", tmpString);
//●実機では、以降で取得している値は間違った値であった
Console.WriteLine("Name: {0}", entry.AdapterName);
Console.WriteLine("Desc: {0}\n", entry.AdapterDescription);
Console.WriteLine("DHCP Enabled: {0}", (entry.DhcpEnabled == 1) ? "Yes" : "No");
if (entry.DhcpEnabled == 1)
{
Console.WriteLine("DHCP Server : {0}", entry.DhcpServer.IpAddress.Address);
// Lease Obtained (convert from "time_t" to C# DateTime)
DateTime pdatDate = new DateTime(1970, 1, 1).AddSeconds(entry.LeaseObtained).ToLocalTime();
Console.WriteLine("Lease Obtained: {0}", pdatDate.ToString());
// Lease Expires (convert from "time_t" to C# DateTime)
pdatDate = new DateTime(1970, 1, 1).AddSeconds(entry.LeaseExpires).ToLocalTime();
Console.WriteLine("Lease Expires : {0}\n", pdatDate.ToString());
} // if DhcpEnabled
Console.WriteLine("IP Address : {0}", entry.IpAddressList.IpAddress.Address);
Console.WriteLine("Subnet Mask : {0}", entry.IpAddressList.IpMask.Address);
Console.WriteLine("Default Gateway: {0}", entry.GatewayList.IpAddress.Address);
// MAC Address (data is in a byte[])
tmpString = string.Empty;
for (int i = 0; i < entry.Address.Length - 1; i++)
{
tmpString += string.Format("{0:X2}-", entry.Address[i]);
}
Console.WriteLine("MAC Address : {0}{1:X2}\n", tmpString, entry.Address[entry.Address.Length - 1]);
Console.WriteLine("Has WINS: {0}", entry.HaveWins ? "Yes" : "No");
if (entry.HaveWins)
{
Console.WriteLine("Primary WINS Server : {0}", entry.PrimaryWinsServer.IpAddress.Address);
Console.WriteLine("Secondary WINS Server: {0}", entry.SecondaryWinsServer.IpAddress.Address);
} // HaveWins
// Get next adapter (if any)
pEntry = entry.Next;
}
while (pEntry != IntPtr.Zero);
Marshal.FreeHGlobal(pArray);
} // if
else
{
Marshal.FreeHGlobal(pArray);
throw new InvalidOperationException("GetAdaptersInfo failed: " + ret);
}
} // GetAdapters
}
}
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