@Test
public void itLogsServerErrors() throws Exception {
header.setRcode(Rcode.REFUSED);
Name name = Name.fromString("John Wayne.");
Record question = Record.newRecord(name, 65530, 43210);
Message query = Message.newQuery(question);
Message response = mock(Message.class);
when(response.getHeader()).thenReturn(header);
when(response.getSectionArray(Section.ANSWER)).thenReturn(null);
when(response.getQuestion()).thenReturn(question);
when(nameServer.query(
any(Message.class), any(InetAddress.class), any(DNSAccessRecord.Builder.class)))
.thenThrow(new RuntimeException("Aw snap!"));
FakeAbstractProtocol abstractProtocol = new FakeAbstractProtocol(client, query.toWire());
abstractProtocol.setNameServer(nameServer);
abstractProtocol.run();
verify(accessLogger)
.info(
"144140678.000 qtype=DNS chi=192.168.23.45 ttms=345.123 xn=65535 fqdn=John\\032Wayne. type=TYPE65530 class=CLASS43210 rcode=SERVFAIL rtype=- rloc=\"-\" rdtl=- rerr=\"Server Error:RuntimeException:Aw snap!\" ttl=\"-\" ans=\"-\"");
}
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);
}
@Test
public void itLogsARecordQueries() throws Exception {
header.setRcode(Rcode.NOERROR);
Name name = Name.fromString("www.example.com.");
Record question = Record.newRecord(name, Type.A, DClass.IN, 0L);
Message query = Message.newQuery(question);
query.getHeader().getRcode();
byte[] queryBytes = query.toWire();
whenNew(Message.class).withArguments(queryBytes).thenReturn(query);
InetAddress resolvedAddress = Inet4Address.getByName("192.168.8.9");
Record answer = new ARecord(name, DClass.IN, 3600L, resolvedAddress);
Record[] answers = new Record[] {answer};
Message response = mock(Message.class);
when(response.getHeader()).thenReturn(header);
when(response.getSectionArray(Section.ANSWER)).thenReturn(answers);
when(response.getQuestion()).thenReturn(question);
InetAddress client = Inet4Address.getByName("192.168.23.45");
when(nameServer.query(
any(Message.class), any(InetAddress.class), any(DNSAccessRecord.Builder.class)))
.thenReturn(response);
FakeAbstractProtocol abstractProtocol = new FakeAbstractProtocol(client, queryBytes);
abstractProtocol.setNameServer(nameServer);
abstractProtocol.run();
verify(accessLogger)
.info(
"144140678.000 qtype=DNS chi=192.168.23.45 ttms=345.123 xn=65535 fqdn=www.example.com. type=A class=IN rcode=NOERROR rtype=- rloc=\"-\" rdtl=- rerr=\"-\" ttl=\"3600\" ans=\"192.168.8.9\"");
}
/** {@inheritDoc} */
@SuppressWarnings("unchecked")
@Override
public Message get(Message request) throws DNSException {
LOGGER.trace("get(Message) Entered");
/* for testing time out cases
try
{
Thread.sleep(1000000);
}
catch (Exception e)
{
}
*/
if (request == null) throw new DNSException(DNSError.newError(Rcode.FORMERR));
Header header = request.getHeader();
if (header.getFlag(Flags.QR) || header.getRcode() != Rcode.NOERROR)
throw new DNSException(DNSError.newError(Rcode.FORMERR));
if (header.getOpcode() != Opcode.QUERY) throw new DNSException(DNSError.newError(Rcode.NOTIMP));
Record question = request.getQuestion();
if (question == null || question.getDClass() != DClass.IN) {
throw new DNSException(DNSError.newError(Rcode.NOTIMP));
}
Record queryRecord = request.getQuestion();
Name name = queryRecord.getName();
int type = queryRecord.getType();
if (LOGGER.isDebugEnabled()) {
StringBuilder builder = new StringBuilder("Recieved Query Request:");
builder.append("\r\n\tName: " + name.toString());
builder.append("\r\n\tType: " + type);
builder.append("\r\n\tDClass: " + queryRecord.getDClass());
LOGGER.debug(builder.toString());
}
Collection<Record> lookupRecords = null;
switch (question.getType()) {
case Type.A:
case Type.MX:
case Type.SOA:
case Type.SRV:
case Type.NS:
case Type.CNAME:
{
try {
final RRset set = processGenericRecordRequest(name.toString(), type);
if (set != null) {
lookupRecords = new ArrayList<Record>();
Iterator<Record> iter = set.rrs();
while (iter.hasNext()) lookupRecords.add(iter.next());
}
} catch (Exception e) {
throw new DNSException(
DNSError.newError(Rcode.SERVFAIL),
"DNS service proxy call failed: " + e.getMessage(),
e);
}
break;
}
case Type.CERT:
{
final RRset set = processCERTRecordRequest(name.toString());
if (set != null) {
lookupRecords = new ArrayList<Record>();
Iterator<Record> iter = set.rrs();
while (iter.hasNext()) lookupRecords.add(iter.next());
}
break;
}
case Type.ANY:
{
Collection<Record> genRecs = processGenericANYRecordRequest(name.toString());
RRset certRecs = processCERTRecordRequest(name.toString());
if (genRecs != null || certRecs != null) {
lookupRecords = new ArrayList<Record>();
if (genRecs != null) lookupRecords.addAll(genRecs);
if (certRecs != null) {
Iterator<Record> iter = certRecs.rrs();
while (iter.hasNext()) lookupRecords.add(iter.next());
}
}
break;
}
default:
{
LOGGER.debug("Query Type " + type + " not implemented");
throw new DNSException(
DNSError.newError(Rcode.NOTIMP), "Query Type " + type + " not implemented");
}
}
if (lookupRecords == null || lookupRecords.size() == 0) {
LOGGER.debug("No records found.");
return null;
}
final Message response = new Message(request.getHeader().getID());
response.getHeader().setFlag(Flags.QR);
if (request.getHeader().getFlag(Flags.RD)) response.getHeader().setFlag(Flags.RD);
response.addRecord(queryRecord, Section.QUESTION);
final Iterator<Record> iter = lookupRecords.iterator();
while (iter.hasNext()) response.addRecord(iter.next(), Section.ANSWER);
// we are authoritative only
response.getHeader().setFlag(Flags.AA);
// look for an SOA record
final Record soaRecord = checkForSoaRecord(name.toString());
if (soaRecord != null) response.addRecord(soaRecord, Section.AUTHORITY);
LOGGER.trace("get(Message) Exit");
return response;
}