mcs/class/System/System.Net/IPEndPoint.cs

   1 //
   2 // System.Net.IPEndPoint.cs
   3 //
   4 // Author:
   5 //   Miguel de Icaza (miguel@ximian.com)
   6 //
   7 // (C) Ximian, Inc.  http://www.ximian.com
   8 //
   9
  10 //
  11 // Permission is hereby granted, free of charge, to any person obtaining
  12 // a copy of this software and associated documentation files (the
  13 // "Software"), to deal in the Software without restriction, including
  14 // without limitation the rights to use, copy, modify, merge, publish,
  15 // distribute, sublicense, and/or sell copies of the Software, and to
  16 // permit persons to whom the Software is furnished to do so, subject to
  17 // the following conditions:
  18 //
  19 // The above copyright notice and this permission notice shall be
  20 // included in all copies or substantial portions of the Software.
  21 //
  22 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  23 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  24 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  25 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  26 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  27 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  28 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  29 //
  30
  31 using System.Net.Sockets;
  32
  33 namespace System.Net {
  34         [Serializable]
  35         public class IPEndPoint : EndPoint {
  36
  37                 private IPAddress address;
  38                 private int port;
  39
  40                 public const int MaxPort = 65535;
  41                 public const int MinPort = 0;
  42
  43                 public IPEndPoint (IPAddress address, int port)
  44                 {
  45                         if (address == null)
  46                                 throw new ArgumentNullException ("address");
  47
  48                         Address = address;
  49                         Port = port;
  50                 }
  51
  52                 public IPEndPoint (long address, int port)
  53                 {
  54                         Address = new IPAddress (address);
  55                         Port = port;
  56                 }
  57
  58                 public IPAddress Address {
  59                         get {
  60                                 return (address);
  61                         }
  62                         set {
  63                                 address=value;
  64                         }
  65                 }
  66
  67                 public override AddressFamily AddressFamily {
  68                         get {
  69                                 return address.AddressFamily;
  70                         }
  71                 }
  72
  73                 public int Port {
  74                         get {
  75                                 return port;
  76                         }
  77                         set {
  78                                 // LAMESPEC: no mention of sanity checking
  79                                 // PS: MS controls the range when setting the value
  80                                 if (value < MinPort || value > MaxPort)
  81                                         throw new ArgumentOutOfRangeException ("Invalid port");
  82
  83                                 port = value;
  84                         }
  85                 }
  86
  87                 // bytes 2 and 3 store the port, the rest
  88                 // stores the address
  89                 public override EndPoint Create (SocketAddress socketAddress)
  90                 {
  91                         if (socketAddress == null)
  92                                 throw new ArgumentNullException ("socketAddress");
  93
  94                         if (socketAddress.Family != AddressFamily)
  95                                 throw new ArgumentException ("The IPEndPoint was created using " + AddressFamily +
  96                                                 " AddressFamily but SocketAddress contains " + socketAddress.Family +
  97                                                 " instead, please use the same type.");
  98
  99                         SocketAddress sockaddr = socketAddress;
 100                         int size =sockaddr.Size;
 101                         AddressFamily family = sockaddr.Family;
 102                         int port;
 103
 104                         IPEndPoint ipe = null;
 105                         switch(family)
 106                         {
 107                                 case AddressFamily.InterNetwork:
 108                                         if (size < 8) {
 109                                                 return(null);
 110                                         }
 111
 112                                         port = (((int)sockaddr[2])<<8) + (int)sockaddr[3];
 113                                         long address=(((long)sockaddr[7])<<24) +
 114                                                 (((long)sockaddr[6])<<16) +
 115                                                 (((long)sockaddr[5])<<8) +
 116                                                 (long)sockaddr[4];
 117
 118                                         ipe = new IPEndPoint(address, port);
 119                                         break;
 120                                 case AddressFamily.InterNetworkV6:
 121                                         if (size < 28) {
 122                                                 return(null);
 123                                         }
 124
 125                                         port    = (((int)sockaddr[2])<<8) + (int)sockaddr[3];
 126
 127                                         /// maybe flowid ?
 128                                         /*
 129                                         int unknown     = (int)sockaddr[4] +
 130                                                 (((int)sockaddr[5])<<8) +
 131                                                 (((int)sockaddr[6])<<16) +
 132                                                 (((int)sockaddr[7])<<24);
 133                                         */
 134
 135                                         int scopeId     = (int)sockaddr[24] +
 136                                                 (((int)sockaddr[25])<<8) +
 137                                                 (((int)sockaddr[26])<<16) +
 138                                                 (((int)sockaddr[27])<<24);
 139
 140                                         ushort[] addressData = new ushort[8];
 141                                         for(int i=0; i<8; i++)
 142                                                 addressData[i] = (ushort)((sockaddr[8+i*2] << 8) + sockaddr[8+i*2+1]);
 143
 144                                         ipe = new IPEndPoint (new IPAddress(addressData, scopeId), port);
 145                                         break;
 146                                 default:
 147                                         return null;
 148                         }
 149
 150                         return(ipe);
 151                 }
 152
 153                 public override SocketAddress Serialize() {
 154                         SocketAddress sockaddr = null;
 155
 156                         switch (address.AddressFamily)
 157                         {
 158                                 case AddressFamily.InterNetwork:
 159                                         // .net produces a 16 byte buffer, even though
 160                                         // only 8 bytes are used. I guess its just a
 161                                         // holdover from struct sockaddr padding.
 162                                         sockaddr = new SocketAddress(AddressFamily.InterNetwork, 16);
 163
 164                                         // bytes 2 and 3 store the port, the rest
 165                                         // stores the address
 166                                         sockaddr [2] = (byte) ((port>>8) & 0xff);
 167                                         sockaddr [3] = (byte) (port & 0xff);
 168                                         long addr = address.InternalIPv4Address;
 169                                         sockaddr [4] = (byte) (addr & 0xff);
 170                                         sockaddr [5] = (byte) ((addr >> 8) & 0xff);
 171                                         sockaddr [6] = (byte) ((addr >> 16) & 0xff);
 172                                         sockaddr [7] = (byte) ((addr >> 24) & 0xff);
 173                                         break;
 174
 175                                 case AddressFamily.InterNetworkV6:
 176                                         sockaddr = new SocketAddress(AddressFamily.InterNetworkV6, 28);
 177
 178                                         sockaddr [2] = (byte) ((port>>8) & 0xff);
 179                                         sockaddr [3] = (byte) (port & 0xff);
 180
 181                                         byte[] addressBytes = address.GetAddressBytes();
 182                                         for(int i=0; i<16; i++)
 183                                                 sockaddr[8+i] = addressBytes[i];
 184
 185                                         sockaddr [24] = (byte) (address.ScopeId & 0xff);
 186                                         sockaddr [25] = (byte) ((address.ScopeId >> 8) & 0xff);
 187                                         sockaddr [26] = (byte) ((address.ScopeId >> 16) & 0xff);
 188                                         sockaddr [27] = (byte) ((address.ScopeId >> 24) & 0xff);
 189                                         break;
 190                         }
 191
 192                         return(sockaddr);
 193                 }
 194
 195                 public override string ToString() {
 196                         return(address.ToString() + ":" + port);
 197                 }
 198
 199                 public override bool Equals (object comparand)
 200                 {
 201                         IPEndPoint p = comparand as IPEndPoint;
 202                         return p != null &&
 203                                p.port == port &&
 204                                p.address.Equals (address);
 205                 }
 206
 207                 public override int GetHashCode ()
 208                 {
 209                         return address.GetHashCode () + port;
 210                 }
 211         }
 212 }