mcs/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
  32 namespace System.Net.NetworkInformation {
  33         public class PhysicalAddress {
  34                 public static readonly PhysicalAddress None = new PhysicalAddress (new byte [0]);
  35                 byte [] bytes;
  36
  37                 public PhysicalAddress (byte [] address)
  38                 {
  39                         this.bytes = address;
  40                 }
  41
  42                 public static PhysicalAddress Parse (string address)
  43                 {
  44                         if (address == null)
  45                                 return None;
  46
  47                         if (address == "")
  48                                 throw new FormatException ("Invalid physical address.");
  49
  50                         // MS fails with IndexOutOfRange for something like: "00-0"
  51                         int ndashes = 0;
  52                         foreach (char c in address) {
  53                                 if (c == '-')
  54                                         ndashes++;
  55                         }
  56
  57                         int len = address.Length;
  58                         if (((len - 2) / 3) != ndashes)
  59                                 throw new FormatException ("Invalid physical address.");
  60
  61                         byte [] data = new byte [ndashes + 1];
  62                         int idx = 0;
  63                         for (int i = 0; i < len; i++) {
  64                                 byte b = (byte) (GetValue (address [i++]) << 8);
  65                                 b += GetValue (address [i++]);
  66                                 if (address [i] != '-')
  67                                         throw new FormatException ("Invalid physical address.");
  68                                 data [idx++] = b;
  69                         }
  70
  71                         return new PhysicalAddress (data);
  72                 }
  73
  74                 static byte GetValue (char c)
  75                 {
  76                         if (c >= 0 && c <= 9)
  77                                 return (byte) (c - '0');
  78
  79                         if (c >= 'a' && c <= 'f')
  80                                 return (byte) (c - 'a' + 10);
  81
  82                         if (c >= 'A' && c <= 'F')
  83                                 return (byte) (c - 'A' + 10);
  84
  85                         throw new FormatException ("Invalid physical address.");
  86                 }
  87
  88                 public override bool Equals (object comparand)
  89                 {
  90                         PhysicalAddress other = comparand as PhysicalAddress;
  91                         if (other == null)
  92                                 return false;
  93
  94                         // new byte [0] != new byte [0]
  95                         return (bytes == other.bytes);
  96                 }
  97
  98                 public override int GetHashCode ()
  99                 {
 100                         if (bytes == null)
 101                                 return 0;
 102
 103                         int a = 5;
 104                         foreach (byte b in bytes)
 105                                 a  = (a << 3)  + b;
 106
 107                         return a;
 108                 }
 109
 110                 public byte [] GetAddressBytes ()
 111                 {
 112                         return bytes;
 113                 }
 114
 115                 public override string ToString ()
 116                 {
 117                         if (bytes == null)
 118                                 return "";
 119
 120                         StringBuilder sb = new StringBuilder ();
 121                         foreach (byte b in bytes)
 122                                 sb.AppendFormat ("{0:2X}", (uint) b);
 123                         return sb.ToString ();
 124                 }
 125         }
 126 }
 127 #endif
 128