Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / ndp / fx / src / Net / System / Net / NetworkInformation / SystemIPAddressInformation.cs / 1305376 / SystemIPAddressInformation.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; //this is the main addressinformation class that contains the ipaddress //and other properties internal class SystemIPAddressInformation:IPAddressInformation{ IPAddress address; internal bool transient = false; internal bool dnsEligible = true; /* // Consider removing. internal SystemIPAddressInformation(){} */ internal SystemIPAddressInformation(IPAddress address) { this.address = address; if (address.AddressFamily == AddressFamily.InterNetwork) { //DngEligible is true except for 169.254.x.x addresses (the APIPA addresses ) dnsEligible = !((address.m_Address & 0x0000FEA9)>0); } } internal SystemIPAddressInformation(IpAdapterUnicastAddress adapterAddress,IPAddress address) { this.address = address; transient = (adapterAddress.flags & AdapterAddressFlags.Transient)>0; dnsEligible = (adapterAddress.flags & AdapterAddressFlags.DnsEligible)>0; } internal SystemIPAddressInformation(IpAdapterAddress adapterAddress,IPAddress address) { this.address = address; transient = (adapterAddress.flags & AdapterAddressFlags.Transient)>0; dnsEligible = (adapterAddress.flags & AdapterAddressFlags.DnsEligible)>0; } public override IPAddress Address{get {return address;}} /// /// Provides support for ip configuation information and statistics. /// The address is a cluster address and shouldn't be used by most applications. public override bool IsTransient{ get { return (transient); } } ///This address can be used for DNS. public override bool IsDnsEligible{ get { return (dnsEligible); } } //helper method that marshals the addressinformation into the classes internal static IPAddressCollection ToAddressCollection(IntPtr ptr,IPVersion versionSupported) { //we don't know the number of addresses up front, so we create an arraylist //to temporarily store them. IPAddressCollection addressList = new IPAddressCollection(); //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(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; //only add addresses that are the same type as what is supported by the interface //this fixes a bug in iphelper regarding dns addresses if (((family == AddressFamily.InterNetwork) && ((versionSupported & IPVersion.IPv4) > 0)) || ((family == AddressFamily.InterNetworkV6) && ((versionSupported & IPVersion.IPv6) > 0))) { 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(ep.Address); } } return addressList; } //helper method that marshals the addressinformation into the classes internal static IPAddressInformationCollection ToAddressInformationCollection(IntPtr ptr,IPVersion versionSupported) { //we don't know the number of addresses up front, so we create an arraylist //to temporarily store them. IPAddressInformationCollection addressList = new IPAddressInformationCollection(); //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 SystemIPAddressInformation(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; //only add addresses that are the same type as what is supported by the interface //this fixes a bug in iphelper regarding dns addresses if (((family == AddressFamily.InterNetwork) && ((versionSupported & IPVersion.IPv4) > 0)) || ((family == AddressFamily.InterNetworkV6) && ((versionSupported & IPVersion.IPv6) > 0))) { 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 SystemIPAddressInformation(addr,ep.Address)); } } return addressList; } } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. 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