private Message makeQuery(DNSRequest request, int id) throws TextParseException {
Name name = Name.fromString(request.getHostname(), Name.root);
int type;
switch (request.getRecordType()) {
case DNSRequest.A:
type = Type.A;
break;
case DNSRequest.AAAA:
type = Type.AAAA;
break;
case DNSRequest.MX:
type = Type.MX;
break;
case DNSRequest.PTR:
type = Type.PTR;
break;
case DNSRequest.SPF:
type = Type.SPF;
break;
case DNSRequest.TXT:
type = Type.TXT;
break;
default:
throw new UnsupportedOperationException("Unknown query type: " + request.getRecordType());
}
Record question = Record.newRecord(name, type, DClass.ANY);
Message query = Message.newQuery(question);
query.getHeader().setID(id);
return query;
}
@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=\"-\"");
}
/*
* Look for SOA records corresponding to the request
* TODO: Add cache coherency to SOA records?
*/
protected synchronized Record checkForSoaRecord(String questionName) {
if (!questionName.endsWith(".")) questionName += ".";
if (soaRecords == null) {
DnsRecord[] getRecs = null;
// load all SOA records...
try {
getRecs = proxy.getDNSByType(Type.SOA);
if (getRecs == null || getRecs.length == 0) soaRecords = Collections.emptyMap();
else {
soaRecords = new HashMap<String, Record>();
for (DnsRecord rec : getRecs) {
Record newRec =
Record.newRecord(
Name.fromString(rec.getName()),
Type.SOA,
rec.getDclass(),
rec.getTtl(),
rec.getData());
soaRecords.put(newRec.getName().toString(), newRec);
}
}
} catch (Exception e) {
LOGGER.error("Failed to load SOA records from config service.");
}
}
Record retVal = null;
if (soaRecords.size() > 0) {
// look for the record by question name
retVal = soaRecords.get(questionName);
if (retVal == null) {
// start taking apart the question name . by .
int index = -1;
while ((index = questionName.indexOf(".")) > 0 && index < (questionName.length() - 1)) {
questionName = questionName.substring(index + 1);
retVal = soaRecords.get(questionName);
if (retVal != null) break;
}
}
}
return retVal;
}
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());
}
}
@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\"");
}
protected Collection<Record> processGenericANYRecordRequest(String name) throws DNSException {
DnsRecord records[];
try {
records = proxy.getDNSByNameAndType(name, Type.ANY);
} catch (Exception e) {
throw new DNSException(
DNSError.newError(Rcode.SERVFAIL),
"DNS service proxy call for DNS records failed: " + e.getMessage(),
e);
}
if (records == null || records.length == 0) return null;
Collection<Record> retVal = new ArrayList<Record>();
try {
for (DnsRecord record : records) {
Record rec =
Record.newRecord(
Name.fromString(record.getName()),
record.getType(),
record.getDclass(),
record.getTtl(),
record.getData());
retVal.add(rec);
}
} catch (Exception e) {
throw new DNSException(
DNSError.newError(Rcode.SERVFAIL),
"Failure while parsing generic record data: " + e.getMessage(),
e);
}
return retVal;
}
/*
* converts a configuration service DnsRecord to a dnsjava Record
*/
private Record toRecord(DnsRecord rec) {
return Record.newRecord(
nameFromString(rec.getName()), rec.getType(), rec.getDclass(), rec.getTtl(), rec.getData());
}
