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SuffixOrigin Enumeration

Specifies how an IP address host suffix was located.

Namespace:  System.Net.NetworkInformation
Assembly:  System (in System.dll)

public enum SuffixOrigin

Member nameDescription
OtherThe suffix was located using an unspecified source.
ManualThe suffix was manually configured.
WellKnownThe suffix is a well-known suffix. Well-known suffixes are specified in standard-track Request for Comments (RFC) documents and assigned by the Internet Assigned Numbers Authority (Iana) or an address registry. Such suffixes are reserved for special purposes.
OriginDhcpThe suffix was supplied by a Dynamic Host Configuration Protocol (DHCP) server.
LinkLayerAddressThe suffix is a link-local suffix.
RandomThe suffix was randomly assigned.

IP addresses are divided into two parts: the prefix and the suffix. The address prefix identifies the network portion of an IP address, and the address suffix identifies the host portion. Prefixes are assigned by global authorities, and suffixes are assigned by local system administrators.

This enumeration is used by the UnicastIPAddressInformation class. Instances of this class are returned when you retrieve the unicast address information for a NetworkInterface object.

The following code example displays prefix and suffix information for unicast addresses.

public static void DisplayUnicastAddresses()
{
    Console.WriteLine("Unicast Addresses");
    NetworkInterface[] adapters  = NetworkInterface.GetAllNetworkInterfaces();
    foreach (NetworkInterface adapter in adapters)
    {
        IPInterfaceProperties adapterProperties = adapter.GetIPProperties();
        UnicastIPAddressInformationCollection uniCast = adapterProperties.UnicastAddresses;
        if (uniCast.Count >0)
        {
            Console.WriteLine(adapter.Description);
            string lifeTimeFormat = "dddd, MMMM dd, yyyy  hh:mm:ss tt";
            foreach (UnicastIPAddressInformation uni in uniCast)
            {
                DateTime when;

                Console.WriteLine("  Unicast Address ......................... : {0}", uni.Address);
                Console.WriteLine("     Prefix Origin ........................ : {0}", uni.PrefixOrigin);
                Console.WriteLine("     Suffix Origin ........................ : {0}", uni.SuffixOrigin);
                Console.WriteLine("     Duplicate Address Detection .......... : {0}", 
                    uni.DuplicateAddressDetectionState);

                // Format the lifetimes as Sunday, February 16, 2003 11:33:44 PM 
                // if en-us is the current culture. 

                // Calculate the date and time at the end of the lifetimes.    
                when = DateTime.UtcNow + TimeSpan.FromSeconds(uni.AddressValidLifetime);
                when = when.ToLocalTime();    
                Console.WriteLine("     Valid Life Time ...................... : {0}", 
                    when.ToString(lifeTimeFormat,System.Globalization.CultureInfo.CurrentCulture)
                );
                when = DateTime.UtcNow + TimeSpan.FromSeconds(uni.AddressPreferredLifetime);   
                when = when.ToLocalTime();
                Console.WriteLine("     Preferred life time .................. : {0}", 
                    when.ToString(lifeTimeFormat,System.Globalization.CultureInfo.CurrentCulture)
                ); 

                when = DateTime.UtcNow + TimeSpan.FromSeconds(uni.DhcpLeaseLifetime);
                when = when.ToLocalTime(); 
                Console.WriteLine("     DHCP Leased Life Time ................ : {0}", 
                    when.ToString(lifeTimeFormat,System.Globalization.CultureInfo.CurrentCulture)
                );
            }
            Console.WriteLine();
        }
    }
}
void DisplayUnicastAddresses()
{
    Console::WriteLine(S"Unicast Addresses");
    NetworkInterface* adapters[]  = NetworkInterface::GetAllNetworkInterfaces();
    System::Collections::IEnumerator* myEnum17 = adapters->GetEnumerator();
    while (myEnum17->MoveNext())
    {
        NetworkInterface* adapter = __try_cast<NetworkInterface*>(myEnum17->Current);
        IPInterfaceProperties* adapterProperties = adapter->GetIPInterfaceProperties();
        IPUnicastAddressInformationCollection* uniCast = adapterProperties->UnicastAddresses;
        if (uniCast->Count >0)
        {
            Console::WriteLine(adapter->Description);
            String* lifeTimeFormat = S"dddd, MMMM dd, yyyy  hh:mm:ss tt";
            System::Collections::IEnumerator* myEnum18 = uniCast->GetEnumerator();
            while (myEnum18->MoveNext())
            {
                IPUnicastAddressInformation* uni = __try_cast<IPUnicastAddressInformation*>(myEnum18->Current);
                DateTime when;

                Console::WriteLine(S"  Unicast Address ......................... : {0}", uni->Address);
                Console::WriteLine(S"     Prefix Origin ........................ : {0}", __box(uni->PrefixOrigin));
                Console::WriteLine(S"     Suffix Origin ........................ : {0}", __box(uni->SuffixOrigin));
                Console::WriteLine(S"     Duplicate Address Detection .......... : {0}", __box(uni->DuplicateAddressDetectionState));

                // Format the lifetimes as Sunday, February 16, 2003 11:33:44 PM
                // if en-us is the current culture.

                // Calculate the date and time at the end of the lifetimes.    
                when = DateTime::UtcNow + TimeSpan::FromSeconds((double)uni->AddressValidLifetime);
                when = when.ToLocalTime();    
                Console::WriteLine(S"     Valid Life Time ...................... : {0}", 
                    when.ToString(lifeTimeFormat,System::Globalization::CultureInfo::CurrentCulture)
                    );
                when = DateTime::UtcNow + TimeSpan::FromSeconds((double)uni->AddressPreferredLifetime);   
                when = when.ToLocalTime();
                Console::WriteLine(S"     Preferred life time .................. : {0}", 
                    when.ToString(lifeTimeFormat,System::Globalization::CultureInfo::CurrentCulture)
                    ); 

                when = DateTime::UtcNow + TimeSpan::FromSeconds((double)uni->DhcpLeaseLifetime);
                when = when.ToLocalTime(); 
                Console::WriteLine(S"     DHCP Leased Life Time ................ : {0}", 
                    when.ToString(lifeTimeFormat,System::Globalization::CultureInfo::CurrentCulture)
                    );
            }
            Console::WriteLine();
        }
    }
}

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0
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