Question

我有一个终端和一个wifi桥（访问可用的wifi点）。通过NetworkInterface我可以找到与wifi网桥的以太网连接。所以现在我需要连接到这个桥接器来获得可用的wifi点，是Wight还是已经连接（我可以看到Lan连接）？对于连接，我需要找到此桥的MAC和IP地址。是否可以使用Net库动态查找？我正在使用managedwifi，但它给出了错误1062：

 WlanClient client = new WlanClient();

任何想法如何找到该wifi网桥的MAC地址？

Answer 1

以下是获取arp表的代码

   public class GetArpTable
    {
        // The max number of physical addresses. 
        const int MAXLEN_PHYSADDR = 8;

       // Define the MIB_IPNETROW structure. 

        struct MIB_IPNETROW 
        {
            public int dwIndex;
            public int dwPhysAddrLen;
            public byte mac0;
            public byte mac1;
            public byte mac2;
            public byte mac3;
            public byte mac4;
            public byte mac5;
            public byte mac6;
            public byte mac7;
            public int dwAddr;
            public int dwType;
        }

        // Declare the GetIpNetTable function.
        [DllImport("IpHlpApi.dll")]
        [return: MarshalAs(UnmanagedType.U4)]

        static extern int GetIpNetTable(
           IntPtr pIpNetTable,
           [MarshalAs(UnmanagedType.U4)] 
         ref int pdwSize,
           bool bOrder);

        // The insufficient buffer error. 
        const int ERROR_INSUFFICIENT_BUFFER = 122;

        static IntPtr buffer;

        static int result;

        public GetArpTable()
        {
            // The number of bytes needed. 
            int bytesNeeded = 0;

            // The result from the API call. 
            result = GetIpNetTable(IntPtr.Zero, ref bytesNeeded, false);

            // Call the function, expecting an insufficient buffer. 
            if (result != ERROR_INSUFFICIENT_BUFFER)
            {
                // Throw an exception. 
                throw new Win32Exception(result);
            }

            // Allocate the memory, do it in a try/finally block, to ensure 
            // that it is released. 
            buffer = IntPtr.Zero;

            // Try/finally. 
            try
            {
                // Allocate the memory. 
                buffer = Marshal.AllocCoTaskMem(bytesNeeded);

                // Make the call again. If it did not succeed, then 
                // raise an error. 
                result = GetIpNetTable(buffer, ref bytesNeeded, false);

                // If the result is not 0 (no error), then throw an exception. 
                if (result != 0)
                {
                    // Throw an exception. 
                    throw new Win32Exception(result);
                }
            }
            finally
            {

            }
          }

         public static string ipstr;
         public static string macname;

         public static void GetNames(IP_Code.LocalHost LocalHost)
         {
            // Now we have the buffer, we have to marshal it. We can read 
            // the first 4 bytes to get the length of the buffer. 
            int entries = Marshal.ReadInt32(buffer);



            // Increment the memory pointer by the size of the int. 
            IntPtr currentBuffer = new IntPtr(buffer.ToInt64() +
               Marshal.SizeOf(typeof(int)));

            // Allocate an array of entries. 
            MIB_IPNETROW[] table = new MIB_IPNETROW[entries];

            // Cycle through the entries. 
            for (int index = 0; index < entries; index++)
            {
                // Call PtrToStructure, getting the structure information. 
                table[index] = (MIB_IPNETROW)Marshal.PtrToStructure(new
                   IntPtr(currentBuffer.ToInt64() + (index *
                   Marshal.SizeOf(typeof(MIB_IPNETROW)))), typeof(MIB_IPNETROW));
            }

            for (int index = 0; index < entries; index++)
            {

                IPAddress ip = new IPAddress((table[index].dwAddr& 0xFFFFFFFF));
                Console.Write("IP:" + ip.ToString() + "\t\tMAC:");


                ipstr = ip.ToString();
                macname = "MAC:";


                byte b;

                b = table[index].mac0;
                if (b < 0x10)
                {
                    Console.Write("0");
                    macname = macname + "0";
                }
                else
                {
                    Console.Write("");
                }
                Console.Write(b.ToString("X"));
                macname = macname + b.ToString("X");

                b = table[index].mac1;
                if (b < 0x10)
                {
                    Console.Write("-0");
                    macname = macname + "-0";
                }
                else
                {
                    Console.Write("-");
                    macname = macname + "-";
                }
                Console.Write(b.ToString("X"));
                macname = macname + b.ToString("X");

                b = table[index].mac2;
                if (b < 0x10)
                {
                    Console.Write("-0");
                    macname = macname + "-0";
                }
                else
                {
                    Console.Write("-");
                    macname = macname + "-";
                }
                Console.Write(b.ToString("X"));
                macname = macname + b.ToString("X");

                b = table[index].mac3;
                if (b < 0x10)
                {
                    Console.Write("-0");
                    macname = macname + "-0";
                }
                else
                {
                    Console.Write("-");
                    macname = macname + "-";
                }
                Console.Write(b.ToString("X"));
                macname = macname + b.ToString("X");

                b = table[index].mac4;
                if (b < 0x10)
                {
                    Console.Write("-0");
                    macname = macname + "-0";
                }
                else
                {
                    Console.Write("-");
                    macname = macname + "-";
                }
                Console.Write(b.ToString("X"));
                macname = macname + b.ToString("X");

                b = table[index].mac5;
                if (b < 0x10)
                {
                    Console.Write("-0");
                    macname = macname + "-0";
                }
                else
                {
                    Console.Write("-");
                    macname = macname + "-";
                }
                Console.Write(b.ToString("X"));
                macname = macname + b.ToString("X");
                Console.WriteLine();

                //test for device
                if (table[index].mac0 == 0x00 && 
                    table[index].mac1 == 0x00 && 
                    table[index].mac2 == 0x00)
                {
                    //if device matches
                }
            }   

         }

         ~GetArpTable()
         {
             // Release the memory. 
             Marshal.FreeCoTaskMem(buffer);
         }

    }

Answer 2

您需要BSSID，即接入点的MAC地址。还有另一个线程解释与wifi相关的内容，在其中你可以找到代码来获取c＃中的bssid：C# - How do I access the WLAN signal strength and others?

动态查找wifi桥的MAC和IP

2 个答案: