Ignore parsing exception.

stackia · Mar 7, 2015 · 7b0d8ed · 7b0d8ed
1 parent 7ab37ff
commit 7b0d8ed
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Showing 2 changed files with 14 additions and 1 deletion.
diff --git a/DNSAgent/DnsAgent.cs b/DNSAgent/DnsAgent.cs
@@ -42,7 +42,15 @@ public async void ReceiveMessage(Semaphore connectionPool)
             try
             {
                 var query = await UdpListener.ReceiveAsync();
-                var message = DnsMessage.Parse(query.Buffer);
+                DnsMessage message;
+                try
+                {
+                    message = DnsMessage.Parse(query.Buffer);
+                }
+                catch (Exception)
+                {
+                    throw new ParsingException();
+                }
                 var targetNameServer = Options.DefaultNameServer;
                 if (Options.QueryTimeout == null)
                     throw new NullReferenceException();
@@ -113,6 +121,9 @@ public async void ReceiveMessage(Semaphore connectionPool)
                 if (e.SocketErrorCode != SocketError.ConnectionReset)
                     Logger.Error("Unexpected socket error:\n{0}", e);
             }
+            catch (ParsingException)
+            {
+            }
             catch (Exception e)
             {
                 Logger.Error("Unexpected exception:\n{0}", e);

diff --git a/DNSAgent/Exceptions.cs b/DNSAgent/Exceptions.cs
@@ -20,4 +20,6 @@ public InfiniteForwardingException(DnsQuestion question)
 
         public DnsQuestion Question { get; set; }
     }
+
+    internal class ParsingException : Exception {}
 }
-Original file line number
+Diff line change
@@ Expand Up / @@ -20,4 +20,6 @@ public InfiniteForwardingException(DnsQuestion question) @@
             public DnsQuestion Question { get; set; }
         }
+        internal class ParsingException : Exception {}
     }