mcs/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 using System;
  30 using System.Collections;
  31 using System.Collections.Generic;
  32 using System.Net;
  33 using System.Runtime.InteropServices;
  34
  35 namespace System.Net.NetworkInformation {
  36         public class IPAddressCollection : ICollection<IPAddress>, IEnumerable<IPAddress>, IEnumerable {
  37                 IList <IPAddress> list = new List<IPAddress> ();
  38
  39                 protected internal IPAddressCollection ()
  40                 {
  41                 }
  42
  43                 internal void SetReadOnly ()
  44                 {
  45                         if (!IsReadOnly)
  46                                 list = ((List<IPAddress>) list).AsReadOnly ();
  47                 }
  48
  49                 public virtual void Add (IPAddress address)
  50                 {
  51                         if (IsReadOnly)
  52                                 throw new NotSupportedException ("The collection is read-only.");
  53                         list.Add (address);
  54                 }
  55
  56                 public virtual void Clear ()
  57                 {
  58                         if (IsReadOnly)
  59                                 throw new NotSupportedException ("The collection is read-only.");
  60                         list.Clear ();
  61                 }
  62
  63                 public virtual bool Contains (IPAddress address)
  64                 {
  65                         return list.Contains (address);
  66                 }
  67
  68                 public virtual void CopyTo (IPAddress [] array, int offset)
  69                 {
  70                         list.CopyTo (array, offset);
  71                 }
  72
  73                 public virtual IEnumerator<IPAddress> GetEnumerator ()
  74                 {
  75                         return ((IEnumerable<IPAddress>)list).GetEnumerator ();
  76                 }
  77
  78                 public virtual bool Remove (IPAddress address)
  79                 {
  80                         if (IsReadOnly)
  81                                 throw new NotSupportedException ("The collection is read-only.");
  82                         return list.Remove (address);
  83                 }
  84
  85                 IEnumerator IEnumerable.GetEnumerator ()
  86                 {
  87                         return list.GetEnumerator ();
  88                 }
  89
  90                 public virtual int Count {
  91                         get { return list.Count; }
  92                 }
  93
  94                 public virtual bool IsReadOnly {
  95                         get { return list.IsReadOnly; }
  96                 }
  97
  98                 public virtual IPAddress this [int index] {
  99                         get { return list [index]; }
 100                 }
 101         }
 102
 103         class Win32IPAddressCollection : IPAddressCollection
 104         {
 105                 public static readonly Win32IPAddressCollection Empty = new Win32IPAddressCollection (IntPtr.Zero);
 106
 107                 bool is_readonly;
 108
 109                 // for static methods
 110                 Win32IPAddressCollection ()
 111                 {
 112                 }
 113
 114                 public Win32IPAddressCollection (params IntPtr [] heads)
 115                 {
 116                         foreach (IntPtr head in heads)
 117                                 AddSubsequentlyString (head);
 118                         is_readonly = true;
 119                 }
 120
 121                 public Win32IPAddressCollection (params Win32_IP_ADDR_STRING [] al)
 122                 {
 123                         foreach (Win32_IP_ADDR_STRING a in al) {
 124                                 if (String.IsNullOrEmpty (a.IpAddress))
 125                                         continue;
 126                                 Add (IPAddress.Parse (a.IpAddress));
 127                                 AddSubsequentlyString (a.Next);
 128                         }
 129                         is_readonly = true;
 130                 }
 131
 132                 public static Win32IPAddressCollection FromAnycast (IntPtr ptr)
 133                 {
 134                         Win32IPAddressCollection c = new Win32IPAddressCollection ();
 135                         Win32_IP_ADAPTER_ANYCAST_ADDRESS a;
 136                         for (IntPtr p = ptr; p != IntPtr.Zero; p = a.Next) {
 137                                 a = (Win32_IP_ADAPTER_ANYCAST_ADDRESS) Marshal.PtrToStructure (p, typeof (Win32_IP_ADAPTER_ANYCAST_ADDRESS));
 138                                 c.Add (a.Address.GetIPAddress ());
 139                         }
 140                         c.is_readonly = true;
 141                         return c;
 142                 }
 143
 144                 public static Win32IPAddressCollection FromDnsServer (IntPtr ptr)
 145                 {
 146                         Win32IPAddressCollection c = new Win32IPAddressCollection ();
 147                         Win32_IP_ADAPTER_DNS_SERVER_ADDRESS a;
 148                         for (IntPtr p = ptr; p != IntPtr.Zero; p = a.Next) {
 149                                 a = (Win32_IP_ADAPTER_DNS_SERVER_ADDRESS) Marshal.PtrToStructure (p, typeof (Win32_IP_ADAPTER_DNS_SERVER_ADDRESS));
 150 // FIXME: It somehow fails here. Looks like there is something wrong.
 151 //if (a.Address.Sockaddr == IntPtr.Zero) throw new Exception ("pointer " + p + " a.length " + a.Address.SockaddrLength);
 152                                 c.Add (a.Address.GetIPAddress ());
 153                         }
 154                         c.is_readonly = true;
 155                         return c;
 156                 }
 157
 158                 void AddSubsequentlyString (IntPtr head)
 159                 {
 160                         Win32_IP_ADDR_STRING a;
 161                         for (IntPtr p = head; p != IntPtr.Zero; p = a.Next) {
 162                                 a = (Win32_IP_ADDR_STRING) Marshal.PtrToStructure (p, typeof (Win32_IP_ADDR_STRING));
 163                                 Add (IPAddress.Parse (a.IpAddress));
 164                         }
 165                 }
 166
 167                 public override bool IsReadOnly {
 168                         get { return is_readonly; }
 169                 }
 170         }
 171 }
 172
 173