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 using System.Net.Sockets;
  11
  12 namespace System.Net {
  13         [Serializable]
  14         public class IPEndPoint : EndPoint {
  15
  16                 private IPAddress address;
  17                 private int port;
  18
  19                 public const int MaxPort = 65535;
  20                 public const int MinPort = 0;
  21
  22                 public IPEndPoint (IPAddress address, int port)
  23                 {
  24                         if (address == null)
  25                                 throw new ArgumentNullException ("Value cannot be null");
  26
  27                         Address = address;
  28                         Port = port;
  29                 }
  30
  31                 public IPEndPoint (long iaddr, int port) : this (new IPAddress (iaddr), port)
  32                 {
  33                 }
  34
  35                 public IPAddress Address {
  36                         get {
  37                                 return (address);
  38                         }
  39                         set {
  40                                 address=value;
  41                         }
  42                 }
  43
  44                 public override AddressFamily AddressFamily {
  45                         get {
  46                                 return address.AddressFamily;
  47                         }
  48                 }
  49
  50                 public int Port {
  51                         get {
  52                                 return port;
  53                         }
  54                         set {
  55                                 // LAMESPEC: no mention of sanity checking
  56                                 // PS: MS controls the range when setting the value
  57                                 if (value < MinPort || value > MaxPort)
  58                                         throw new ArgumentOutOfRangeException ("Invalid port");
  59
  60                                 port = value;
  61                         }
  62                 }
  63
  64                 // bytes 2 and 3 store the port, the rest
  65                 // stores the address
  66                 public override EndPoint Create(SocketAddress sockaddr) {
  67                         int size=sockaddr.Size;
  68
  69                         // LAMESPEC: no mention of what to do if
  70                         // sockaddr is bogus
  71                         if(size<8) {
  72                                 // absolute minimum amount needed for
  73                                 // an address family, buffer size,
  74                                 // port and address
  75                                 return(null);
  76                         }
  77
  78                         AddressFamily family=(AddressFamily)sockaddr[0];
  79                         int port;
  80
  81                         IPEndPoint ipe = null;
  82                         switch(family)
  83                         {\r
  84                                 case AddressFamily.InterNetwork:\r
  85                                         port = (((int)sockaddr[2])<<8) + (int)sockaddr[3];
  86                                         long address=(((long)sockaddr[7])<<24) +
  87                                                 (((long)sockaddr[6])<<16) +
  88                                                 (((long)sockaddr[5])<<8) +
  89                                                 (long)sockaddr[4];
  90
  91                                         ipe = new IPEndPoint(address, port);\r
  92                                         break;\r
  93 #if NET_1_1\r
  94                                 case AddressFamily.InterNetworkV6:\r
  95                                         port    = (((int)sockaddr[2])<<8) + (int)sockaddr[3];
  96
  97                                         /// maybe flowid ?
  98                                         int unknown     = (int)sockaddr[4] +
  99                                                 (((int)sockaddr[5])<<8) +
 100                                                 (((int)sockaddr[6])<<16) +
 101                                                 (((int)sockaddr[7])<<24);
 102
 103                                         int scopeId     = (int)sockaddr[24] +
 104                                                 (((int)sockaddr[25])<<8) +
 105                                                 (((int)sockaddr[26])<<16) +
 106                                                 (((int)sockaddr[27])<<24);
 107
 108                                         ushort[] addressData = new ushort[8];
 109                                         for(int i=0; i<8; i++)
 110                                                 addressData[i] = (ushort)((sockaddr[8+i*2] << 8) + sockaddr[8+i*2+1]);
 111
 112                                         ipe = new IPEndPoint (new IPAddress(addressData, scopeId), port);\r
 113                                         break;\r
 114 #endif\r
 115                                 default:\r
 116                                         return null;\r
 117                         }
 118
 119                         return(ipe);
 120                 }
 121
 122                 public override SocketAddress Serialize() {
 123                         SocketAddress sockaddr = null;
 124
 125                         switch (address.AddressFamily)
 126                         {\r
 127                                 case AddressFamily.InterNetwork:\r
 128                                         // .net produces a 16 byte buffer, even though
 129                                         // only 8 bytes are used. I guess its just a
 130                                         // holdover from struct sockaddr padding.
 131                                         sockaddr = new SocketAddress(AddressFamily.InterNetwork, 16);
 132
 133                                         // bytes 2 and 3 store the port, the rest
 134                                         // stores the address
 135                                         sockaddr [2] = (byte) ((port>>8) & 0xff);
 136                                         sockaddr [3] = (byte) (port & 0xff);
 137
 138                                         sockaddr [4] = (byte) (address.Address & 0xff);
 139                                         sockaddr [5] = (byte) ((address.Address >> 8) & 0xff);
 140                                         sockaddr [6] = (byte) ((address.Address >> 16) & 0xff);
 141                                         sockaddr [7] = (byte) ((address.Address >> 24) & 0xff);\r
 142                                         break;\r
 143 #if NET_1_1\r
 144                                 case AddressFamily.InterNetworkV6:\r
 145                                         sockaddr = new SocketAddress(AddressFamily.InterNetworkV6, 28);
 146
 147                                         sockaddr [2] = (byte) ((port>>8) & 0xff);
 148                                         sockaddr [3] = (byte) (port & 0xff);
 149
 150                                         byte[] addressBytes = address.GetAddressBytes();
 151                                         for(int i=0; i<16; i++)
 152                                                 sockaddr[8+i] = addressBytes[i];
 153
 154                                         sockaddr [24] = (byte) (address.ScopeId & 0xff);
 155                                         sockaddr [25] = (byte) ((address.ScopeId >> 8) & 0xff);
 156                                         sockaddr [26] = (byte) ((address.ScopeId >> 16) & 0xff);
 157                                         sockaddr [27] = (byte) ((address.ScopeId >> 24) & 0xff);\r
 158                                         break;\r
 159 #endif\r
 160                         }
 161
 162                         return(sockaddr);
 163                 }
 164
 165                 public override string ToString() {
 166                         return(address.ToString() + ":" + port);
 167                 }
 168
 169                 public override bool Equals (Object obj)
 170                 {
 171                         IPEndPoint p = obj as IPEndPoint;
 172                         return p != null &&
 173                                p.port == port &&
 174                                p.address.Equals (address);
 175                 }
 176
 177                 public override int GetHashCode ()
 178                 {
 179                         return address.GetHashCode () + port;
 180                 }
 181         }
 182 }