SystemIPInterfaceProperties.cs

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using System.Net.Sockets;
 
namespace System.Net.NetworkInformation;
 
internal sealed class SystemIPInterfaceProperties : IPInterfaceProperties
{
    private readonly bool _dnsEnabled;
 
    private readonly bool _dynamicDnsEnabled;
 
    private readonly InternalIPAddressCollection _dnsAddresses;
 
    private readonly UnicastIPAddressInformationCollection _unicastAddresses;
 
    private readonly MulticastIPAddressInformationCollection _multicastAddresses;
 
    private readonly IPAddressInformationCollection _anycastAddresses;
 
    private readonly global::Interop.IpHlpApi.AdapterFlags _adapterFlags;
 
    private readonly string _dnsSuffix;
 
    private readonly SystemIPv4InterfaceProperties _ipv4Properties;
 
    private readonly SystemIPv6InterfaceProperties _ipv6Properties;
 
    private readonly InternalIPAddressCollection _winsServersAddresses;
 
    private readonly GatewayIPAddressInformationCollection _gatewayAddresses;
 
    private readonly InternalIPAddressCollection _dhcpServers;
 
    public override bool IsDnsEnabled => _dnsEnabled;
 
    public override bool IsDynamicDnsEnabled => _dynamicDnsEnabled;
 
    public override string DnsSuffix => _dnsSuffix;
 
    public override IPAddressInformationCollection AnycastAddresses => _anycastAddresses;
 
    public override UnicastIPAddressInformationCollection UnicastAddresses => _unicastAddresses;
 
    public override MulticastIPAddressInformationCollection MulticastAddresses => _multicastAddresses;
 
    public override IPAddressCollection DnsAddresses => _dnsAddresses;
 
    public override GatewayIPAddressInformationCollection GatewayAddresses => _gatewayAddresses;
 
    public override IPAddressCollection DhcpServerAddresses => _dhcpServers;
 
    public override IPAddressCollection WinsServersAddresses => _winsServersAddresses;
 
    internal SystemIPInterfaceProperties(in global::Interop.IpHlpApi.FIXED_INFO fixedInfo, in global::Interop.IpHlpApi.IpAdapterAddresses ipAdapterAddresses)
    {
        _adapterFlags = ipAdapterAddresses.flags;
        _dnsSuffix = ipAdapterAddresses.dnsSuffix;
        _dnsEnabled = fixedInfo.enableDns;
        _dynamicDnsEnabled = (ipAdapterAddresses.flags & global::Interop.IpHlpApi.AdapterFlags.DnsEnabled) > (global::Interop.IpHlpApi.AdapterFlags)0;
        _multicastAddresses = SystemMulticastIPAddressInformation.ToMulticastIpAddressInformationCollection(global::Interop.IpHlpApi.IpAdapterAddress.MarshalIpAddressInformationCollection(ipAdapterAddresses.firstMulticastAddress));
        _dnsAddresses = global::Interop.IpHlpApi.IpAdapterAddress.MarshalIpAddressCollection(ipAdapterAddresses.firstDnsServerAddress);
        _anycastAddresses = global::Interop.IpHlpApi.IpAdapterAddress.MarshalIpAddressInformationCollection(ipAdapterAddresses.firstAnycastAddress);
        _unicastAddresses = SystemUnicastIPAddressInformation.MarshalUnicastIpAddressInformationCollection(ipAdapterAddresses.firstUnicastAddress);
        _winsServersAddresses = global::Interop.IpHlpApi.IpAdapterAddress.MarshalIpAddressCollection(ipAdapterAddresses.firstWinsServerAddress);
        _gatewayAddresses = SystemGatewayIPAddressInformation.ToGatewayIpAddressInformationCollection(global::Interop.IpHlpApi.IpAdapterAddress.MarshalIpAddressCollection(ipAdapterAddresses.firstGatewayAddress));
        _dhcpServers = new InternalIPAddressCollection();
        if (ipAdapterAddresses.dhcpv4Server.address != IntPtr.Zero)
        {
            _dhcpServers.InternalAdd(ipAdapterAddresses.dhcpv4Server.MarshalIPAddress());
        }
        if (ipAdapterAddresses.dhcpv6Server.address != IntPtr.Zero)
        {
            _dhcpServers.InternalAdd(ipAdapterAddresses.dhcpv6Server.MarshalIPAddress());
        }
        if ((_adapterFlags & global::Interop.IpHlpApi.AdapterFlags.IPv4Enabled) != 0)
        {
            _ipv4Properties = new SystemIPv4InterfaceProperties(fixedInfo, ipAdapterAddresses);
        }
        if ((_adapterFlags & global::Interop.IpHlpApi.AdapterFlags.IPv6Enabled) != 0)
        {
            _ipv6Properties = new SystemIPv6InterfaceProperties(ipAdapterAddresses.ipv6Index, ipAdapterAddresses.mtu, ipAdapterAddresses.zoneIndices);
        }
    }
 
    public override IPv4InterfaceProperties GetIPv4Properties()
    {
        if (_ipv4Properties == null)
        {
            throw new NetworkInformationException(SocketError.ProtocolNotSupported);
        }
        return _ipv4Properties;
    }
 
    public override IPv6InterfaceProperties GetIPv6Properties()
    {
        if (_ipv6Properties == null)
        {
            throw new NetworkInformationException(SocketError.ProtocolNotSupported);
        }
        return _ipv6Properties;
    }
}