NetworkTarget - Dual Mode IPv4 mapped addresses over IPv6 (#4922)

NLog · May 13, 2022 · 4091315 · 4091315
1 parent eb1f8d3
commit 4091315
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Showing 2 changed files with 7 additions and 1 deletion.
diff --git a/src/NLog/Internal/NetworkSenders/SocketProxy.cs b/src/NLog/Internal/NetworkSenders/SocketProxy.cs
@@ -52,6 +52,12 @@ internal sealed class SocketProxy : ISocket, IDisposable
         internal SocketProxy(AddressFamily addressFamily, SocketType socketType, ProtocolType protocolType)
         {
             _socket = new Socket(addressFamily, socketType, protocolType);
+#if !NET35
+            if (addressFamily == AddressFamily.InterNetworkV6)
+            {
+                _socket.DualMode = true;   // Allow for IPv4 mapped addresses over IPv6
+            }
+#endif
         }
 
         /// <summary>

diff --git a/src/NLog/Internal/NetworkSenders/UdpNetworkSender.cs b/src/NLog/Internal/NetworkSenders/UdpNetworkSender.cs
@@ -73,7 +73,7 @@ public UdpNetworkSender(string url, AddressFamily addressFamily)
         protected internal virtual ISocket CreateSocket(IPAddress ipAddress)
         {
             var proxy = new SocketProxy(ipAddress.AddressFamily, SocketType.Dgram, ProtocolType.Udp);
-            if (ipAddress.Equals(IPAddress.Broadcast))
+            if (ipAddress.AddressFamily != AddressFamily.InterNetworkV6 && ipAddress.Equals(IPAddress.Broadcast))
             {
                 proxy.UnderlyingSocket.EnableBroadcast = true;
             }