Update the mDNS native extension for Mac OS to handle PTR and SRV records

pkg/mdns/test/decode_test.dart

 // Copyright (c) 2015, the Fletch 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.md file.
 
 import 'package:expect/expect.dart';
+import 'package:mdns/src/constants.dart';
 import 'package:mdns/src/packet.dart';
 
 main() {
   testValidPackages();
   testBadPackages();
   testHexDumpList();
+  testPTRRData();
+  testSRVRData();
 }
 
 testValidPackages() {
   var result;
   result = decodeMDnsResponse(package1);
   Expect.equals(1, result.length);
   Expect.equals('raspberrypi.local', result[0].name);
   Expect.equals('192.168.1.191', result[0].address.address);
 
   result = decodeMDnsResponse(package2);
@@ skipping 29 matching lines @@
 }
 
 testBadPackages() {
   for (var p in [package1, package2, package3]) {
     for (int i = 0; i < p.length; i++) {
       decodeMDnsResponse(p.sublist(0, i));
     }
   }
 }
 
+testPTRRData() {
+  Expect.equals(
+    'sgjesse-macbookpro2 [78:31:c1:b8:55:38]._workstation._tcp.local',
+    readFQDN(ptrRData));
+    print(readFQDN(ptrRData2));
+  Expect.equals('fletch-agent._fletch_agent._tcp.local', readFQDN(ptrRData2));
+}
+
+testSRVRData() {
+  Expect.equals('fletch.local', readFQDN(srvRData, srvHeaderSize));
+}
+
 testHexDumpList() {
   // Call hexDumpList to get rid of hint.
   formatHexStream("");
   hexDumpList([]);
 }
 
 // One address.
 var package1 = [
     0x00, 0x00, 0x84, 0x00, 0x00, 0x00, 0x00, 0x01,
     0x00, 0x00, 0x00, 0x00, 0x0b, 0x72, 0x61, 0x73,
@@ skipping 66 matching lines @@
   0x69, 0xc0, 0x1f, 0xc0, 0x6d, 0x00, 0x1c, 0x80,
   0x01, 0x00, 0x00, 0x00, 0x78, 0x00, 0x10, 0xfe,
   0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xba,
   0x27, 0xeb, 0xff, 0xfe, 0x69, 0x6e, 0x3a, 0xc0,
   0x6d, 0x00, 0x01, 0x80, 0x01, 0x00, 0x00, 0x00,
   0x78, 0x00, 0x04, 0xc0, 0xa8, 0x01, 0x01, 0xc0,
   0x6d, 0x00, 0x01, 0x80, 0x01, 0x00, 0x00, 0x00,
   0x78, 0x00, 0x04, 0xa9, 0xfe, 0xa7, 0xac
 ];
 
+var ptrRData = <int>[
+  0x27, 0x73, 0x67, 0x6a, 0x65, 0x73, 0x73, 0x65,
+  0x2d, 0x6d, 0x61, 0x63, 0x62, 0x6f, 0x6f, 0x6b,
+  0x70, 0x72, 0x6f, 0x32, 0x20, 0x5b, 0x37, 0x38,
+  0x3a, 0x33, 0x31, 0x3a, 0x63, 0x31, 0x3a, 0x62,
+  0x38, 0x3a, 0x35, 0x35, 0x3a, 0x33, 0x38, 0x5d,
+  0x0c, 0x5f, 0x77, 0x6f, 0x72, 0x6b, 0x73, 0x74,
+  0x61, 0x74, 0x69, 0x6f, 0x6e, 0x04, 0x5f, 0x74,
+  0x63, 0x70, 0x05, 0x6c, 0x6f, 0x63, 0x61, 0x6c,
+  0x00
+];
+
+var ptrRData2 = <int>[
+  0x0c, 0x66, 0x6c, 0x65, 0x74, 0x63, 0x68, 0x2d,
+  0x61, 0x67, 0x65, 0x6e, 0x74, 0x0d, 0x5f, 0x66,
+  0x6c, 0x65, 0x74, 0x63, 0x68, 0x5f, 0x61, 0x67,
+  0x65, 0x6e, 0x74, 0x04, 0x5f, 0x74, 0x63, 0x70,
+  0x05, 0x6c, 0x6f, 0x63, 0x61, 0x6c, 0x00
+];
+
+var srvRData = <int> [
+  0x00, 0x00, 0x00, 0x00, 0x2f, 0x59, 0x06, 0x66,
+  0x6c, 0x65, 0x74, 0x63, 0x68, 0x05, 0x6c, 0x6f,
+  0x63, 0x61, 0x6c, 0x00
+];
+
 // Support code to generate the hex-lists above from
 // a hex-stream.
 void formatHexStream(String hexStream) {
   var s = '';
   for (int i = 0; i < hexStream.length / 2; i++) {
     if (s.length != 0) s += ', ';
     s += '0x';
     var x = hexStream.substring(i * 2, i * 2 + 2);
     s += x;
     if (((i + 1) % 8) == 0) {
@@ skipping 15 matching lines @@
     if (x.length == 1) s += '0';
     s += x;
     if (((i + 1) % 8) == 0) {
       s += ',';
       print(s);
       s = '';
     }
   }
   if (s.length != 0) print(s);
 }