Code:
/ DotNET / DotNET / 8.0 / untmp / whidbey / REDBITS / ndp / fx / src / Net / System / Net / NetworkInformation / SystemMulticastIPAddressInformation.cs / 1 / SystemMulticastIPAddressInformation.cs
////// namespace System.Net.NetworkInformation { using System.Net; using System.Net.Sockets; using System; using System.Runtime.InteropServices; using System.Collections; using System.ComponentModel; using System.Security.Permissions; using Microsoft.Win32; /// /// Provides support for ip configuation information and statistics. /// /// Specifies the Multicast addresses for an interface. ///OS < XP ////// internal class SystemMulticastIPAddressInformation:MulticastIPAddressInformation { private IpAdapterAddress adapterAddress; private SystemIPAddressInformation innerInfo; private SystemMulticastIPAddressInformation() { } /* // Consider removing. internal SystemMulticastIPAddressInformation(IpAdapterInfo ipAdapterInfo, IPAddress address){ innerInfo = new SystemIPAddressInformation(address); DateTime tempdate = new DateTime(1970,1,1); tempdate = tempdate.AddSeconds(ipAdapterInfo.leaseExpires); dhcpLeaseLifetime = (long)((tempdate - DateTime.UtcNow).TotalSeconds); } */ internal SystemMulticastIPAddressInformation(IpAdapterAddress adapterAddress, IPAddress ipAddress){ innerInfo = new SystemIPAddressInformation(adapterAddress,ipAddress); this.adapterAddress = adapterAddress; } ///public override IPAddress Address{get {return innerInfo.Address;}} /// /// The address is a cluster address and shouldn't be used by most applications. public override bool IsTransient{ get { return (innerInfo.IsTransient); } } ////// This address can be used for DNS. public override bool IsDnsEligible{ get { return (innerInfo.IsDnsEligible); } } ///public override PrefixOrigin PrefixOrigin{ get { if (! ComNetOS.IsPostWin2K) throw new PlatformNotSupportedException(SR.GetString(SR.WinXPRequired)); return PrefixOrigin.Other; } } /// public override SuffixOrigin SuffixOrigin{ get { if (! ComNetOS.IsPostWin2K) throw new PlatformNotSupportedException(SR.GetString(SR.WinXPRequired)); return SuffixOrigin.Other; } } /// /// IPv6 only. Specifies the duplicate address detection state. Only supported /// for IPv6. If called on an IPv4 address, will throw a "not supported" exception. public override DuplicateAddressDetectionState DuplicateAddressDetectionState{ get { if (! ComNetOS.IsPostWin2K) throw new PlatformNotSupportedException(SR.GetString(SR.WinXPRequired)); return DuplicateAddressDetectionState.Invalid; } } ////// Specifies the valid lifetime of the address in seconds. public override long AddressValidLifetime{ get { if (! ComNetOS.IsPostWin2K) throw new PlatformNotSupportedException(SR.GetString(SR.WinXPRequired)); return 0; } } ////// Specifies the prefered lifetime of the address in seconds. public override long AddressPreferredLifetime{ get { if (! ComNetOS.IsPostWin2K) throw new PlatformNotSupportedException(SR.GetString(SR.WinXPRequired)); return 0; } } ////// /// Specifies the prefered lifetime of the address in seconds. public override long DhcpLeaseLifetime{ get { return 0; } } //helper method that marshals the addressinformation into the classes internal static MulticastIPAddressInformationCollection ToAddressInformationCollection(IntPtr ptr) { //we don't know the number of addresses up front, so we create an arraylist //to temporarily store them. MulticastIPAddressInformationCollection addressList = new MulticastIPAddressInformationCollection(); //if there is no address, just return; if (ptr == IntPtr.Zero) return addressList; //get the first address IpAdapterAddress addr = (IpAdapterAddress)Marshal.PtrToStructure(ptr,typeof(IpAdapterAddress)); //determine the address family used to create the IPAddress AddressFamily family = (addr.address.addressLength > 16)?AddressFamily.InterNetworkV6:AddressFamily.InterNetwork; SocketAddress sockAddress = new SocketAddress(family,(int)addr.address.addressLength); Marshal.Copy(addr.address.address,sockAddress.m_Buffer,0,addr.address.addressLength); //unfortunately, the only way to currently create an ipaddress is through IPEndPoint IPEndPoint ep; if (family == AddressFamily.InterNetwork ) ep = (IPEndPoint)IPEndPoint.Any.Create(sockAddress); else ep = (IPEndPoint)IPEndPoint.IPv6Any.Create(sockAddress); //add the ipaddress to the arraylist addressList.InternalAdd(new SystemMulticastIPAddressInformation(addr,ep.Address)); //repeat for all of the addresses while ( addr.next != IntPtr.Zero ) { addr = (IpAdapterAddress)Marshal.PtrToStructure(addr.next,typeof(IpAdapterAddress)); //determine the address family used to create the IPAddress family = (addr.address.addressLength > 16)?AddressFamily.InterNetworkV6:AddressFamily.InterNetwork; sockAddress = new SocketAddress(family,(int)addr.address.addressLength); Marshal.Copy(addr.address.address,sockAddress.m_Buffer,0,addr.address.addressLength); //use the endpoint to create the ipaddress if (family == AddressFamily.InterNetwork ) ep = (IPEndPoint)IPEndPoint.Any.Create(sockAddress); else ep = (IPEndPoint)IPEndPoint.IPv6Any.Create(sockAddress); addressList.InternalAdd(new SystemMulticastIPAddressInformation(addr,ep.Address)); } return addressList; } } }
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