检索接口到IP地址映射表

我知道WinAPI的GetBestInterface返回的网络接口索引。如何根据接口索引获取接口属性（IPv4地址）？检索接口到IP地址映射表

这里是工作的C++代码，但我需要它在C＃中。

PMIB_IPADDRTABLE pAddrTable; 
PMIB_IPADDRROW  pAddrRow; 
in_addr    ia; 


CBasePage::OnSetActive(); 

m_edit1.SetFont(&m_font); 
m_edit1.SetWindowText(""); 

GetIpAddrTable((PMIB_IPADDRTABLE) m_pBuffer, &m_ulSize, TRUE); 

m_pBuffer = new BYTE[m_ulSize]; 
if (NULL != m_pBuffer) 
{ 
    m_dwResult = GetIpAddrTable((PMIB_IPADDRTABLE) m_pBuffer, &m_ulSize, TRUE); 
    if (m_dwResult == NO_ERROR) 
    { 
     pAddrTable = (PMIB_IPADDRTABLE) m_pBuffer; 

     for (int x = 0; x < pAddrTable->dwNumEntries; x++) 
     { 
      pAddrRow = (PMIB_IPADDRROW) &(pAddrTable->table[x]); 

      ia.S_un.S_addr = pAddrRow->dwAddr; 
      m_strText.Format("  IP address: %s\r\n", inet_ntoa(ia)); 
      m_edit1.ReplaceSel(m_strText); 

      m_strText.Format(" Interface index: %lu\r\n", pAddrRow->dwIndex); 
      m_edit1.ReplaceSel(m_strText); 

      ia.S_un.S_addr = pAddrRow->dwMask; 
      m_strText.Format("  Subnet mask: %s\r\n", inet_ntoa(ia)); 
      m_edit1.ReplaceSel(m_strText); 

      ia.S_un.S_addr = pAddrRow->dwBCastAddr; 
      m_strText.Format("Broadcast address: %s\r\n", inet_ntoa(ia)); 
      m_edit1.ReplaceSel(m_strText); 

      m_edit1.ReplaceSel("\r\n"); 
     } 
    } 
    else 
    { 
     m_strText.Format("GetIpAddrTable() failed. Result = %lu\r\n", m_dwResult); 
     m_edit1.ReplaceSel(m_strText); 
    } 

    delete [] m_pBuffer; 
}

我已经试过example on pinvoke，但它所有的接口返回0.0.0.0。

来源

2011-09-27 technology

它为我的作品：

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Text; 
using System.Runtime.InteropServices; 
using System.Net; 

namespace IpInfo 
{ 
    [StructLayout(LayoutKind.Sequential, CharSet=CharSet.Ansi)] 
    struct MIB_IPADDRROW 
    { 
     public int   _address; 
     public int   _index; 
     public int   _mask; 
     public int   _broadcastAddress; 
     public int   _reassemblySize; 
     public ushort _unused1; 
     public ushort _type; 
    } 

    class Program 
    { 
     [DllImport("iphlpapi.dll", SetLastError=true)] 
     public static extern int GetIpAddrTable(IntPtr pIpAddrTable, ref int pdwSize, bool bOrder); 

     static void Main(string[] args) 
     { 
      IntPtr pBuf = IntPtr.Zero; 
      int nBufSize = 0; 
      // get the required buffer size    
      GetIpAddrTable(IntPtr.Zero, ref nBufSize, false); 
      // allocate the buffer 
      pBuf = Marshal.AllocHGlobal(nBufSize); 

      try 
      { 
       int r = GetIpAddrTable(pBuf, ref nBufSize, false); 
       if (r != 0) 
        throw new System.ComponentModel.Win32Exception(r); 

       int entrySize = Marshal.SizeOf(typeof(MIB_IPADDRROW)); 
       int nEntries = Marshal.ReadInt32(pBuf); 
       int tableStartAddr = (int)pBuf + sizeof(int); 
       for (int i = 0; i < nEntries; i++) 
       { 
        IntPtr pEntry = (IntPtr)(tableStartAddr + i * entrySize); 
        MIB_IPADDRROW addrStruct = (MIB_IPADDRROW)Marshal.PtrToStructure(pEntry, typeof(MIB_IPADDRROW)); 
        string ipAddrStr = IPToString(IPAddress.NetworkToHostOrder(addrStruct._address)); 
        string ipMaskStr = IPToString(IPAddress.NetworkToHostOrder(addrStruct._mask)); 
        Console.WriteLine("IP:" + ipAddrStr + " Mask:" + ipMaskStr); 
       } 
      } 
      finally 
      { 
       if (pBuf != IntPtr.Zero) 
       { 
        Marshal.FreeHGlobal(pBuf); 
       } 
      } 
     } 

     // helper function IPToString 
     static string IPToString(int ipaddr) 
     { 
      return String.Format("{0}.{1}.{2}.{3}", 
      (ipaddr >> 24) & 0xFF, (ipaddr >> 16) & 0xFF, 
      (ipaddr >> 8) & 0xFF, ipaddr & 0xFF); 
     } 
    } 
}

生成输出像这样我的机器上：

IP:127.0.0.1 Mask:255.0.0.0 
IP:192.168.1.3 Mask:255.255.255.0

来源

2011-09-27 15:28:06

它只是工作。谢谢。我一定错过了一些东西 – technology

您是否尝试过通过.NET为此提供的功能：

来源

2011-09-27 18:10:49

检索接口到IP地址映射表

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