Examples with Question org.minidns.dnsmessage.Question used on opensource projects

Example 1 with Question

use of org.minidns.dnsmessage.Question in project minidns by MiniDNS.

the class AbstractDNSClient method query.

public final DNSMessage query(DNSMessage requestMessage, InetAddress address, int port) throws IOException {
    // See if we have the answer to this question already cached
    DNSMessage responseMessage = (cache == null) ? null : cache.get(requestMessage);
    if (responseMessage != null) {
        return responseMessage;
    }
    final Question q = requestMessage.getQuestion();
    final Level TRACE_LOG_LEVEL = Level.FINE;
    LOGGER.log(TRACE_LOG_LEVEL, "Asking {0} on {1} for {2} with:\n{3}", new Object[] { address, port, q, requestMessage });
    try {
        responseMessage = dataSource.query(requestMessage, address, port);
    } catch (IOException e) {
        LOGGER.log(TRACE_LOG_LEVEL, "IOException {0} on {1} while resolving {2}: {3}", new Object[] { address, port, q, e });
        throw e;
    }
    if (responseMessage != null) {
        LOGGER.log(TRACE_LOG_LEVEL, "Response from {0} on {1} for {2}:\n{3}", new Object[] { address, port, q, responseMessage });
    } else {
        // TODO When should this ever happen?
        LOGGER.log(Level.SEVERE, "NULL response from " + address + " on " + port + " for " + q);
    }
    if (responseMessage == null)
        return null;
    onResponseCallback.onResponse(requestMessage, responseMessage);
    return responseMessage;
}

Example 2 with Question

use of org.minidns.dnsmessage.Question in project minidns by MiniDNS.

the class AbstractDNSClient method queryAsync.

public final MiniDnsFuture<DNSMessage, IOException> queryAsync(DNSMessage requestMessage, InetAddress address, int port) {
    // See if we have the answer to this question already cached
    DNSMessage responseMessage = (cache == null) ? null : cache.get(requestMessage);
    if (responseMessage != null) {
        return MiniDnsFuture.from(responseMessage);
    }
    final Question q = requestMessage.getQuestion();
    final Level TRACE_LOG_LEVEL = Level.FINE;
    LOGGER.log(TRACE_LOG_LEVEL, "Asynchronusly asking {0} on {1} for {2} with:\n{3}", new Object[] { address, port, q, requestMessage });
    return dataSource.queryAsync(requestMessage, address, port, onResponseCallback);
}

Example 3 with Question

use of org.minidns.dnsmessage.Question in project minidns by MiniDNS.

the class AbstractDNSClient method getCachedRecordsFor.

private <D extends Data> Set<D> getCachedRecordsFor(DNSName dnsName, TYPE type) {
    Question dnsNameNs = new Question(dnsName, type);
    DNSMessage queryDnsNameNs = getQueryFor(dnsNameNs);
    DNSMessage cachedResult = cache.get(queryDnsNameNs);
    if (cachedResult == null)
        return Collections.emptySet();
    return cachedResult.getAnswersFor(dnsNameNs);
}

Example 4 with Question

use of org.minidns.dnsmessage.Question in project minidns by MiniDNS.

the class LRUCacheTest method testOverfilledCache.

@Test
public void testOverfilledCache() {
    Question q = new Question("", Record.TYPE.A);
    DNSMessage question = q.asQueryMessage();
    lruCache.put(question, createSampleMessage());
    assertNotNull(lruCache.get(question));
    lruCache.put(new Question("1", Record.TYPE.A).asQueryMessage(), createSampleMessage());
    lruCache.put(new Question("2", Record.TYPE.A).asQueryMessage(), createSampleMessage());
    lruCache.put(new Question("3", Record.TYPE.A).asQueryMessage(), createSampleMessage());
    lruCache.put(new Question("4", Record.TYPE.A).asQueryMessage(), createSampleMessage());
    lruCache.put(new Question("5", Record.TYPE.A).asQueryMessage(), createSampleMessage());
    assertNull(lruCache.get(question));
    assertEquals(0, lruCache.getExpireCount());
    assertEquals(1, lruCache.getMissCount());
    assertEquals(1, lruCache.getHitCount());
}

Example 5 with Question

use of org.minidns.dnsmessage.Question in project minidns by MiniDNS.

the class IterativeDNSClient method queryRecursive.

private DNSMessage queryRecursive(ResolutionState resolutionState, DNSMessage q, InetAddress address, DNSName authoritativeZone) throws IOException {
    resolutionState.recurse(address, q);
    DNSMessage resMessage = query(q, address);
    if (resMessage == null) {
        // TODO throw exception here?
        return null;
    }
    if (resMessage.authoritativeAnswer) {
        return resMessage;
    }
    if (cache != null) {
        cache.offer(q, resMessage, authoritativeZone);
    }
    List<Record<? extends Data>> authorities = resMessage.copyAuthority();
    List<IOException> ioExceptions = new LinkedList<>();
    // Glued NS first
    for (Iterator<Record<? extends Data>> iterator = authorities.iterator(); iterator.hasNext(); ) {
        Record<? extends Data> record = iterator.next();
        if (record.type != TYPE.NS) {
            iterator.remove();
            continue;
        }
        DNSName name = ((NS) record.payloadData).target;
        IpResultSet gluedNs = searchAdditional(resMessage, name);
        for (Iterator<InetAddress> addressIterator = gluedNs.addresses.iterator(); addressIterator.hasNext(); ) {
            InetAddress target = addressIterator.next();
            DNSMessage recursive = null;
            try {
                recursive = queryRecursive(resolutionState, q, target, record.name);
            } catch (IOException e) {
                abortIfFatal(e);
                LOGGER.log(Level.FINER, "Exception while recursing", e);
                resolutionState.decrementSteps();
                ioExceptions.add(e);
                if (!addressIterator.hasNext()) {
                    iterator.remove();
                }
                continue;
            }
            return recursive;
        }
    }
    // Try non-glued NS
    for (Record<? extends Data> record : authorities) {
        final Question question = q.getQuestion();
        DNSName name = ((NS) record.payloadData).target;
        // AAAA RR, then we should not continue here as it would result in an endless loop.
        if (question.name.equals(name) && (question.type == TYPE.A || question.type == TYPE.AAAA))
            continue;
        IpResultSet res = null;
        try {
            res = resolveIpRecursive(resolutionState, name);
        } catch (IOException e) {
            resolutionState.decrementSteps();
            ioExceptions.add(e);
        }
        if (res == null) {
            continue;
        }
        for (InetAddress target : res.addresses) {
            DNSMessage recursive = null;
            try {
                recursive = queryRecursive(resolutionState, q, target, record.name);
            } catch (IOException e) {
                resolutionState.decrementSteps();
                ioExceptions.add(e);
                continue;
            }
            return recursive;
        }
    }
    MultipleIoException.throwIfRequired(ioExceptions);
    // where we able to find glue records or the IPs of the next nameservers.
    return null;
}