private void sendQuery() {
Header queryHeader = new Header();
// If we set the RA (Recursion Available) flag and our message ID to 0
// then the packet matches the real mDNS query packet as displayed in Wireshark
queryHeader.setFlag(org.xbill.DNS.Flags.RA);
queryHeader.setID(0);
Record question = null;
try {
// We need to create our "Question" DNS query that is a pointer record to
// the mDNS Query "Name"
question = Record.newRecord(new Name(NvmDNS.MDNS_QUERY), Type.PTR, DClass.IN);
} catch (TextParseException e) {
Log.e("NvmDNS Query", e.getMessage());
return;
}
// We combine our header and our question into a single message
Message query = new Message();
query.setHeader(queryHeader);
query.addRecord(question, Section.QUESTION);
// Convert the message into Network Byte Order
byte[] wireQuery = query.toWire();
Log.i("NvmDNS Query", query.toString());
// Convert our byte array into a Packet
DatagramPacket transmitPacket = new DatagramPacket(wireQuery, wireQuery.length);
transmitPacket.setAddress(NvmDNS.MDNS_MULTICAST_ADDRESS);
transmitPacket.setPort(NvmDNS.MDNS_PORT);
// And (attempt) to send the packet
try {
Log.d("NvmDNS Query", "Blocking on this.nvstream_socket.send(transmitPacket)");
this.socket.send(transmitPacket);
Log.d("NvmDNS Query", "Passed this.nvstream_socket.send(transmitPacket)");
} catch (IOException e) {
Log.e("NvmDNS Query", "There was an error sending the DNS query.");
Log.e("NvmDNS Query", e.getMessage());
}
}
@Before
public void before() throws Exception {
// force the xn field in the request
Random random = mock(Random.class);
Mockito.when(random.nextInt(0xffff)).thenReturn(65535);
whenNew(Random.class).withNoArguments().thenReturn(random);
mockStatic(System.class);
when(System.currentTimeMillis()).thenReturn(144140678000L).thenReturn(144140678345L);
when(System.nanoTime()).thenReturn(100000000L, 100000000L + 345123000L);
mockStatic(Logger.class);
when(Logger.getLogger("com.comcast.cdn.traffic_control.traffic_router.core.access"))
.thenReturn(accessLogger);
header = new Header();
header.setID(65535);
header.setFlag(Flags.QR);
client = Inet4Address.getByAddress(new byte[] {(byte) 192, (byte) 168, 23, 45});
nameServer = mock(NameServer.class);
}
