class/System/System.Net.NetworkInformation/IPAddressCollection.cs

   1 //
   2 // System.Net.NetworkInformation.IPAddressCollection
   3 //
   4 // Authors:
   5 //      Gonzalo Paniagua Javier (gonzalo@novell.com)
   6 //      Atsushi Enomoto (atsushi@ximian.com)
   7 //
   8 // Copyright (c) 2006-2007 Novell, Inc. (http://www.novell.com)
   9 //
  10 // Permission is hereby granted, free of charge, to any person obtaining
  11 // a copy of this software and associated documentation files (the
  12 // "Software"), to deal in the Software without restriction, including
  13 // without limitation the rights to use, copy, modify, merge, publish,
  14 // distribute, sublicense, and/or sell copies of the Software, and to
  15 // permit persons to whom the Software is furnished to do so, subject to
  16 // the following conditions:
  17 //
  18 // The above copyright notice and this permission notice shall be
  19 // included in all copies or substantial portions of the Software.
  20 //
  21 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22 // EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23 // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  24 // NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  25 // LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 // OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28 //
  29 #if NET_2_0
  30 using System;
  31 using System.Collections;
  32 using System.Collections.Generic;
  33 using System.Net;
  34 using System.Runtime.InteropServices;
  35
  36 namespace System.Net.NetworkInformation {
  37         public class IPAddressCollection : ICollection<IPAddress>, IEnumerable<IPAddress>, IEnumerable {
  38                 IList <IPAddress> list = new List<IPAddress> ();
  39
  40                 protected internal IPAddressCollection ()
  41                 {
  42                 }
  43
  44                 internal void SetReadOnly ()
  45                 {
  46                         if (!IsReadOnly)
  47                                 list = ((List<IPAddress>) list).AsReadOnly ();
  48                 }
  49
  50                 public virtual void Add (IPAddress address)
  51                 {
  52                         if (IsReadOnly)
  53                                 throw new NotSupportedException ("The collection is read-only.");
  54                         list.Add (address);
  55                 }
  56
  57                 public virtual void Clear ()
  58                 {
  59                         if (IsReadOnly)
  60                                 throw new NotSupportedException ("The collection is read-only.");
  61                         list.Clear ();
  62                 }
  63
  64                 public virtual bool Contains (IPAddress address)
  65                 {
  66                         return list.Contains (address);
  67                 }
  68
  69                 public virtual void CopyTo (IPAddress [] array, int offset)
  70                 {
  71                         list.CopyTo (array, offset);
  72                 }
  73
  74                 public virtual IEnumerator<IPAddress> GetEnumerator ()
  75                 {
  76                         return ((IEnumerable<IPAddress>)list).GetEnumerator ();
  77                 }
  78
  79                 public virtual bool Remove (IPAddress address)
  80                 {
  81                         if (IsReadOnly)
  82                                 throw new NotSupportedException ("The collection is read-only.");
  83                         return list.Remove (address);
  84                 }
  85
  86                 IEnumerator IEnumerable.GetEnumerator ()
  87                 {
  88                         return list.GetEnumerator ();
  89                 }
  90
  91                 public virtual int Count {
  92                         get { return list.Count; }
  93                 }
  94
  95                 public virtual bool IsReadOnly {
  96                         get { return list.IsReadOnly; }
  97                 }
  98
  99                 public virtual IPAddress this [int index] {
 100                         get { return list [index]; }
 101                 }
 102         }
 103
 104         class Win32IPAddressCollection : IPAddressCollection
 105         {
 106                 public static readonly Win32IPAddressCollection Empty = new Win32IPAddressCollection (IntPtr.Zero);
 107
 108                 bool is_readonly;
 109
 110                 // for static methods
 111                 Win32IPAddressCollection ()
 112                 {
 113                 }
 114
 115                 public Win32IPAddressCollection (params IntPtr [] heads)
 116                 {
 117                         foreach (IntPtr head in heads)
 118                                 AddSubsequentlyString (head);
 119                         is_readonly = true;
 120                 }
 121
 122                 public Win32IPAddressCollection (params Win32_IP_ADDR_STRING [] al)
 123                 {
 124                         foreach (Win32_IP_ADDR_STRING a in al) {
 125                                 if (String.IsNullOrEmpty (a.IpAddress))
 126                                         continue;
 127                                 Add (IPAddress.Parse (a.IpAddress));
 128                                 AddSubsequentlyString (a.Next);
 129                         }
 130                         is_readonly = true;
 131                 }
 132
 133                 public static Win32IPAddressCollection FromAnycast (IntPtr ptr)
 134                 {
 135                         Win32IPAddressCollection c = new Win32IPAddressCollection ();
 136                         Win32_IP_ADAPTER_ANYCAST_ADDRESS a;
 137                         for (IntPtr p = ptr; p != IntPtr.Zero; p = a.Next) {
 138                                 a = (Win32_IP_ADAPTER_ANYCAST_ADDRESS) Marshal.PtrToStructure (p, typeof (Win32_IP_ADAPTER_ANYCAST_ADDRESS));
 139                                 c.Add (a.Address.GetIPAddress ());
 140                         }
 141                         c.is_readonly = true;
 142                         return c;
 143                 }
 144
 145                 public static Win32IPAddressCollection FromDnsServer (IntPtr ptr)
 146                 {
 147                         Win32IPAddressCollection c = new Win32IPAddressCollection ();
 148                         Win32_IP_ADAPTER_DNS_SERVER_ADDRESS a;
 149                         for (IntPtr p = ptr; p != IntPtr.Zero; p = a.Next) {
 150                                 a = (Win32_IP_ADAPTER_DNS_SERVER_ADDRESS) Marshal.PtrToStructure (p, typeof (Win32_IP_ADAPTER_DNS_SERVER_ADDRESS));
 151 // FIXME: It somehow fails here. Looks like there is something wrong.
 152 //if (a.Address.Sockaddr == IntPtr.Zero) throw new Exception ("pointer " + p + " a.length " + a.Address.SockaddrLength);
 153                                 c.Add (a.Address.GetIPAddress ());
 154                         }
 155                         c.is_readonly = true;
 156                         return c;
 157                 }
 158
 159                 void AddSubsequentlyString (IntPtr head)
 160                 {
 161                         Win32_IP_ADDR_STRING a;
 162                         for (IntPtr p = head; p != IntPtr.Zero; p = a.Next) {
 163                                 a = (Win32_IP_ADDR_STRING) Marshal.PtrToStructure (p, typeof (Win32_IP_ADDR_STRING));
 164                                 Add (IPAddress.Parse (a.IpAddress));
 165                         }
 166                 }
 167
 168                 public override bool IsReadOnly {
 169                         get { return is_readonly; }
 170                 }
 171         }
 172 }
 173 #endif
 174