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//
// System.Net.NetworkInformation.UnicastIPAddressInformation
//
// Authors:
// Gonzalo Paniagua Javier (gonzalo@novell.com)
// Atsushi Enomoto (atsushi@ximian.com)
// Eric Butler (eric@extremeboredom.net)
//
// Copyright (c) 2006-2007 Novell, Inc. (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
#if WIN_PLATFORM
using System.Net.Sockets;
using System.Diagnostics.Contracts;
namespace System.Net.NetworkInformation {
class Win32UnicastIPAddressInformation : UnicastIPAddressInformation
{
Win32_IP_ADAPTER_UNICAST_ADDRESS info;
IPAddress ipv4Mask;
public Win32UnicastIPAddressInformation (Win32_IP_ADAPTER_UNICAST_ADDRESS info)
{
this.info = info;
IPAddress ipAddress = info.Address.GetIPAddress ();
// IPv6 returns 0.0.0.0 for consistancy with XP
if (ipAddress.AddressFamily == AddressFamily.InterNetwork) {
ipv4Mask = PrefixLengthToSubnetMask (info.OnLinkPrefixLength, ipAddress.AddressFamily);
}
}
public override IPAddress Address {
get { return info.Address.GetIPAddress (); }
}
public override bool IsDnsEligible {
get { return info.LengthFlags.IsDnsEligible; }
}
public override bool IsTransient {
get { return info.LengthFlags.IsTransient; }
}
// UnicastIPAddressInformation members
public override long AddressPreferredLifetime {
get { return info.PreferredLifetime; }
}
public override long AddressValidLifetime {
get { return info.ValidLifetime; }
}
public override long DhcpLeaseLifetime {
get { return info.LeaseLifetime; }
}
public override DuplicateAddressDetectionState DuplicateAddressDetectionState {
get { return info.DadState; }
}
public override IPAddress IPv4Mask{
get {
// The IPv6 equivilant was never available on XP, and we've kept this behavior for legacy reasons.
// For IPv6 use PrefixLength instead.
if (Address.AddressFamily != AddressFamily.InterNetwork) {
return IPAddress.Any;
}
return ipv4Mask;
}
}
public override PrefixOrigin PrefixOrigin {
get { return info.PrefixOrigin; }
}
public override SuffixOrigin SuffixOrigin {
get { return info.SuffixOrigin; }
}
// Convert a CIDR prefix length to a subnet mask "255.255.255.0" format
private static IPAddress PrefixLengthToSubnetMask (byte prefixLength, AddressFamily family) {
Contract.Requires ((0 <= prefixLength) && (prefixLength <= 126));
Contract.Requires ((family == AddressFamily.InterNetwork) || (family == AddressFamily.InterNetworkV6));
byte[] addressBytes;
if (family == AddressFamily.InterNetwork) {
addressBytes = new byte [4];
} else { // v6
addressBytes = new byte [16];
}
Contract.Assert (prefixLength < (addressBytes.Length * 8));
// Enable bits one at a time from left/high to right/low
for (int bit = 0; bit < prefixLength; bit++) {
addressBytes [bit / 8] |= (byte) (0x80 >> (bit % 8));
}
return new IPAddress (addressBytes);
}
}
}
#endif
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