class/Mono.Posix/Mono.Unix/AbstractUnixEndPoint.cs

   1 //
   2 // Mono.Unix.AbstractUnixEndPoint: EndPoint derived class for AF_UNIX family sockets.
   3 //
   4 // Authors:
   5 //      Gonzalo Paniagua Javier (gonzalo@ximian.com)
   6 //      Alp Toker  (alp@atoker.com)
   7 //
   8 // (C) 2003 Ximian, Inc (http://www.ximian.com)
   9 // (C) 2006 Alp Toker
  10 //
  11
  12 //
  13 // Permission is hereby granted, free of charge, to any person obtaining
  14 // a copy of this software and associated documentation files (the
  15 // "Software"), to deal in the Software without restriction, including
  16 // without limitation the rights to use, copy, modify, merge, publish,
  17 // distribute, sublicense, and/or sell copies of the Software, and to
  18 // permit persons to whom the Software is furnished to do so, subject to
  19 // the following conditions:
  20 //
  21 // The above copyright notice and this permission notice shall be
  22 // included in all copies or substantial portions of the Software.
  23 //
  24 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  31 //
  32 using System;
  33 using System.Net;
  34 using System.Net.Sockets;
  35 using System.Text;
  36
  37 namespace Mono.Unix
  38 {
  39         [Serializable]
  40         public class AbstractUnixEndPoint : EndPoint
  41         {
  42                 string path;
  43
  44                 public AbstractUnixEndPoint (string path)
  45                 {
  46                         if (path == null)
  47                                 throw new ArgumentNullException ("path");
  48
  49                         if (path == "")
  50                                 throw new ArgumentException ("Cannot be empty.", "path");
  51                         this.path = path;
  52                 }
  53
  54                 public string Path {
  55                         get {
  56                                 return(path);
  57                         }
  58                         set {
  59                                 path=value;
  60                         }
  61                 }
  62
  63                 public override AddressFamily AddressFamily {
  64                         get { return AddressFamily.Unix; }
  65                 }
  66
  67                 public override EndPoint Create (SocketAddress socketAddress)
  68                 {
  69                         /*
  70                          * Should also check this
  71                          *
  72                         int addr = (int) AddressFamily.Unix;
  73                         if (socketAddress [0] != (addr & 0xFF))
  74                                 throw new ArgumentException ("socketAddress is not a unix socket address.");
  75
  76                         if (socketAddress [1] != ((addr & 0xFF00) >> 8))
  77                                 throw new ArgumentException ("socketAddress is not a unix socket address.");
  78                          */
  79
  80                         byte [] bytes = new byte [socketAddress.Size - 2 - 1];
  81                         for (int i = 0; i < bytes.Length; i++) {
  82                                 bytes [i] = socketAddress [2 + 1 + i];
  83                         }
  84
  85                         string name = Encoding.Default.GetString (bytes);
  86                         return new AbstractUnixEndPoint (name);
  87                 }
  88
  89                 public override SocketAddress Serialize ()
  90                 {
  91                         byte [] bytes = Encoding.Default.GetBytes (path);
  92                         SocketAddress sa = new SocketAddress (AddressFamily, 2 + 1 + bytes.Length);
  93                         //NULL prefix denotes the abstract namespace, see unix(7)
  94                         //in this case, there is no NULL suffix
  95                         sa [2] = 0;
  96
  97                         // sa [0] -> family low byte, sa [1] -> family high byte
  98                         for (int i = 0; i < bytes.Length; i++)
  99                                 sa [i + 2 + 1] = bytes [i];
 100
 101                         return sa;
 102                 }
 103
 104                 public override string ToString() {
 105                         return(path);
 106                 }
 107
 108                 public override int GetHashCode ()
 109                 {
 110                         return path.GetHashCode ();
 111                 }
 112
 113                 public override bool Equals (object o)
 114                 {
 115                         AbstractUnixEndPoint other = o as AbstractUnixEndPoint;
 116                         if (other == null)
 117                                 return false;
 118
 119                         return (other.path == path);
 120                 }
 121         }
 122 }
 123