Add a mDNS package

pkg/mdns/lib/src/constants.dart

Index: pkg/mdns/lib/src/constants.dart
diff --git a/pkg/mdns/lib/src/constants.dart b/pkg/mdns/lib/src/constants.dart
new file mode 100644
index 0000000000000000000000000000000000000000..1fa52c53e41896e18aae4f67809fd85ae13f9096
--- /dev/null
+++ b/pkg/mdns/lib/src/constants.dart
@@ -0,0 +1,26 @@
+// Copyright (c) 2015, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+library mdns.src.constants;
+
+import 'dart:io';
+
+InternetAddress mDNSAddress = new InternetAddress('224.0.0.251');

[karlklose, 2015/10/28 10:14:30]

'mDnsAddress'

[Søren Gjesse, 2015/10/28 11:36:57]

Done.

+const int mDNSPort = 5353;

[karlklose, 2015/10/28 10:14:30]

'mDnsPort'

[Søren Gjesse, 2015/10/28 11:36:57]

Done.

+
+const int idOffset = 0;
+const int flagsOffset = 2;
+const int qdcountOffset = 4;
+const int ancountOffset = 6;
+const int nscountOffset = 8;
+const int arcountOffset = 10;
+
+const int headerSize = 12;
+
+const int responseFlags = 0x8400;
+
+const int ipV4AddressType = 0x0001;
+const int ipV4Class = 0x8001;
+const int ipV6AddressType = 0x001c;
+const int ipV6Class = 0x8001;