Export protocol name for all protocols known to .NET Core

Author: sandersaares

README.md

@@ -40,8 +40,6 @@ Example Prometheus scrape configuration:
 
 Only IPv4 packets are analyzed - IPv6 is ignored.
 
-Only TCP and UDP are analyzed - other transport-level protocols are simply "unknown".
-
 # How do I analyze multiple parallel packet streams?
 
 You can direct multiple TZSP streams to the same analyzer, either on the same port or separate ports (using multiple `--listen-port` options). The output metrics carry a label indicating the listen port the data arrived on.

TzspPacketStreamExporter/ExporterLogic.cs

@@ -5,6 +5,7 @@
 using System.IO;
 using System.Linq;
 using System.Net;
+using System.Net.Sockets;
 using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
@@ -349,12 +350,10 @@ private static void ProcessTzspPacket(byte[] packet, ushort listenPort)
                 // unknown protocol
             }
 
-            string protocolName = protocol switch
-            {
-                6 => "tcp",
-                17 => "udp",
-                _ => "unknown"
-            };
+            string protocolName = "unknown";
+
+            if (Enum.IsDefined(typeof(ProtocolType), (int)protocol))
+                protocolName = ((ProtocolType)protocol).ToString().ToLowerInvariant();
 
             BytesBase.WithLabels(sourceAddressString, sourceAddressType, destinationAddressString, destinationAddressType, protocolName, listenPort.ToString()).Inc(totalPacketLengthIncludingIpHeader);
             PacketsBase.WithLabels(sourceAddressString, sourceAddressType, destinationAddressString, destinationAddressType, protocolName, listenPort.ToString()).Inc();