IPGlobalProperties.GetActiveUdpListeners Method ()

 
System_CAPS_noteNote

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Returns information about the Internet Protocol version 4 (IPv4) and IPv6 User Datagram Protocol (UDP) listeners on the local computer.

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

public abstract IPEndPoint[] GetActiveUdpListeners()

Return Value

Type: System.Net.IPEndPoint[]

An IPEndPoint array that contains objects that describe the UDP listeners, or an empty array if no UDP listeners are detected.

Exception Condition
NetworkInformationException

The call to the Win32 function GetUdpTable failed.

UDP is a connectionless transport layer protocol that is responsible for sending and receiving datagrams. It is defined in IETF RFC 768.

A UDP listener is an open socket that waits for and receives UDP datagrams. Because UDP is a connectionless protocol, the listener does not maintain a connection to a remote endpoint.

The following example displays the active UDP listeners.

public static void ShowActiveUdpListeners()
{
    Console.WriteLine("Active UDP Listeners");
    IPGlobalProperties properties = IPGlobalProperties.GetIPGlobalProperties();
    IPEndPoint[] endPoints =  properties.GetActiveUdpListeners();
    foreach (IPEndPoint e in endPoints)
    {
        Console.WriteLine(e.ToString());
    }
}

NetworkInformationPermission

for reading network information. Associated enumeration: Read.

.NET Framework
Available since 2.0
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