class/System/System.Net.NetworkInformation/PhysicalAddress.cs

   1 //
   2 // System.Net.NetworkInformation.PhysicalAddress
   3 //
   4 // Author:
   5 //      Gonzalo Paniagua Javier (gonzalo@novell.com)
   6 //
   7 // Copyright (c) 2006 Novell, Inc. (http://www.novell.com)
   8 //
   9 // Permission is hereby granted, free of charge, to any person obtaining
  10 // a copy of this software and associated documentation files (the
  11 // "Software"), to deal in the Software without restriction, including
  12 // without limitation the rights to use, copy, modify, merge, publish,
  13 // distribute, sublicense, and/or sell copies of the Software, and to
  14 // permit persons to whom the Software is furnished to do so, subject to
  15 // the following conditions:
  16 //
  17 // The above copyright notice and this permission notice shall be
  18 // included in all copies or substantial portions of the Software.
  19 //
  20 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27 //
  28 #if NET_2_0
  29 using System;
  30 using System.Text;
  31 using System.Globalization;
  32
  33 namespace System.Net.NetworkInformation {
  34         public class PhysicalAddress {
  35                 public static readonly PhysicalAddress None = new PhysicalAddress (new byte [0]);
  36                 private const int numberOfBytes = 6;
  37                 byte [] bytes;
  38
  39                 public PhysicalAddress (byte [] address)
  40                 {
  41                         this.bytes = address;
  42                 }
  43
  44                 internal static PhysicalAddress ParseEthernet (string address)
  45                 {
  46                         if (address == null)
  47                                 return None;
  48
  49                         string [] blocks = address.Split (':');
  50                         byte [] bytes = new byte [blocks.Length];
  51                         int i = 0;
  52                         foreach (string b in blocks){
  53                                 bytes [i++] = Byte.Parse (b, NumberStyles.HexNumber);
  54                         }
  55                         return new PhysicalAddress (bytes);
  56                 }
  57
  58                 public static PhysicalAddress Parse (string address)
  59                 {
  60                         if (address == null)
  61                                 return None;
  62
  63                         if (address == string.Empty)
  64                                 throw new FormatException("An invalid physical address was specified.");
  65
  66                         string[] addrSplit = address.Split('-');
  67
  68                         if (addrSplit.Length == 1) {
  69                                 if (address.Length != numberOfBytes * 2)
  70                                         throw new FormatException("An invalid physical address was specified.");
  71
  72                                 addrSplit = new string[numberOfBytes];
  73                                 for (int index = 0; index < addrSplit.Length; index++) {
  74                                         addrSplit[index] = address.Substring(index * 2, 2);
  75                                 }
  76                         }
  77
  78                         if (addrSplit.Length == numberOfBytes) {
  79                                 foreach (string str in addrSplit)
  80                                         if (str.Length > 2)
  81                                                 throw new FormatException("An invalid physical address was specified.");
  82                                         else if (str.Length < 2)
  83                                                 throw new IndexOutOfRangeException("An invalid physical address was specified.");
  84                         }
  85                         else
  86                                 throw new FormatException("An invalid physical address was specified.");
  87
  88                         byte[] data = new byte[numberOfBytes];
  89                         for (int i = 0; i < numberOfBytes; i++) {
  90                                 byte b = (byte)(GetValue(addrSplit[i][0]) << 4);
  91                                 b += GetValue(addrSplit[i][1]);
  92                                 data[i] = b;
  93                         }
  94
  95                         return new PhysicalAddress (data);
  96                 }
  97
  98                 static byte GetValue (char c)
  99                 {
 100                         if (c >= '0' && c <= '9')
 101                                 return (byte) (c - '0');
 102
 103                         if (c >= 'a' && c <= 'f')
 104                                 return (byte) (c - 'a' + 10);
 105
 106                         if (c >= 'A' && c <= 'F')
 107                                 return (byte) (c - 'A' + 10);
 108
 109                         throw new FormatException ("Invalid physical address.");
 110                 }
 111
 112                 public override bool Equals (object comparand)
 113                 {
 114                         PhysicalAddress other = comparand as PhysicalAddress;
 115                         if (other == null)
 116                                 return false;
 117
 118                         if (bytes.Length != other.bytes.Length)
 119                                 return false;
 120
 121                         for (int index = 0; index < bytes.Length; index++)
 122                                 if (bytes[index] != other.bytes[index])
 123                                         return false;
 124
 125                         return true;
 126                 }
 127
 128                 public override int GetHashCode ()
 129                 {
 130                         return (bytes[5] << 8) ^ (bytes[4]) ^ (bytes[3] << 24) ^ (bytes[2] << 16) ^ (bytes[1] << 8) ^ (bytes[0]);
 131                 }
 132
 133                 public byte [] GetAddressBytes ()
 134                 {
 135                         return bytes;
 136                 }
 137
 138                 public override string ToString ()
 139                 {
 140                         if (bytes == null)
 141                                 return "";
 142
 143                         StringBuilder sb = new StringBuilder ();
 144                         foreach (byte b in bytes)
 145                                 sb.AppendFormat("{0:X2}", b);
 146                         return sb.ToString ();
 147                 }
 148         }
 149 }
 150 #endif