Fixed ListenToSocketInternal so it works after Jellyfin 10.9.2

[ms-afk]

Related to this issue.

The last Jellyfin update changed NetworkManager's GetAllBindInterfaces method.
This caused ListenToSocketInternal to fail if no local addresses were set, because the new implementation returns an IPData object without setting its Index property.
This causes the First() method in ListenToSocketInternal to throw an InvalidOperationException.

To fix this I check if GetAllBindInterfaces returns one and just one IPData object and if this object corresponds to what GetAllBindInterfaces returns in case no local address has been set in Jellyfin.

Indeed GetAllBindInterfaces will only set those addresses (IPAddress.Any and IPAddress.IPv6Any) when no local address has been set.

[crobibero]

Formatting is off

Index: src/Rssdp/SsdpCommunicationsServer.cs
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
diff --git a/src/Rssdp/SsdpCommunicationsServer.cs b/src/Rssdp/SsdpCommunicationsServer.cs
--- a/src/Rssdp/SsdpCommunicationsServer.cs	(revision 2fa639a5a808b16b55399840b961dacf220a9706)
+++ b/src/Rssdp/SsdpCommunicationsServer.cs	(date 1716745437738)
@@ -416,19 +416,17 @@
                         var remoteEndpoint = (IPEndPoint)result.RemoteEndPoint;
                         var allBindInterfaces = _networkManager.GetAllBindInterfaces();
                         IPData localEndpointAdapter;
-                        if (
-                            allBindInterfaces.Count == 1
-                            && (
-                                allBindInterfaces.First().Address.Equals(IPAddress.Any)
-                                || allBindInterfaces.First().Address.Equals(IPAddress.IPv6Any)
-                            )
-                        )
+                        if (allBindInterfaces.Count == 1
+                            && (allBindInterfaces[0].Address.Equals(IPAddress.Any)
+                                || allBindInterfaces[0].Address.Equals(IPAddress.IPv6Any)))
                         {
-                            localEndpointAdapter = allBindInterfaces.First();
-                        } else
+                            localEndpointAdapter = allBindInterfaces[0];
+                        }
+                        else
                         {
                             localEndpointAdapter = allBindInterfaces.First(a => a.Index == result.PacketInformation.Interface);
                         }
+
                         ProcessMessage(
                             Encoding.UTF8.GetString(receiveBuffer, 0, result.ReceivedBytes),
                             remoteEndpoint,
@@ -522,7 +520,7 @@
                 LocalIPAddress = localIPAddress
             });
         }
-        
+
         private Socket CreateSsdpUdpSocket(IPData bindInterface, int localPort)
         {
             var interfaceAddress = bindInterface.Address;
@@ -548,7 +546,7 @@
                 throw;
             }
         }
-        
+
         private Socket CreateUdpMulticastSocket(IPAddress multicastAddress, IPData bindInterface, int multicastTimeToLive, int localPort)
         {
             var bindIPAddress = bindInterface.Address;

[ms-afk]

Fixed formatting