Examples with DnsQuestion io.netty.handler.codec.dns.DnsQuestion used on opensource projects

Example 1 with DnsQuestion

use of io.netty.handler.codec.dns.DnsQuestion in project netty by netty.

the class DnsQueryContext method query.

void query() {
    final DnsQuestion question = question();
    final InetSocketAddress nameServerAddr = nameServerAddr();
    final DatagramDnsQuery query = new DatagramDnsQuery(null, nameServerAddr, id);
    query.setRecursionDesired(recursionDesired);
    query.addRecord(DnsSection.QUESTION, question);
    for (DnsRecord record : additionals) {
        query.addRecord(DnsSection.ADDITIONAL, record);
    }
    if (optResource != null) {
        query.addRecord(DnsSection.ADDITIONAL, optResource);
    }
    if (logger.isDebugEnabled()) {
        logger.debug("{} WRITE: [{}: {}], {}", parent.ch, id, nameServerAddr, question);
    }
    sendQuery(query);
}

Example 2 with DnsQuestion

use of io.netty.handler.codec.dns.DnsQuestion in project LogHub by fbacchella.

the class NettyNameResolver method resolve.

@Override
public boolean resolve(Event event, String query, String destination) throws ProcessorException {
    DnsQuestion dnsquery = new DefaultDnsQuestion(query, DnsRecordType.PTR);
    Element e = hostCache.get(makeKey(dnsquery));
    if (e != null) {
        DnsCacheEntry cached = (DnsCacheEntry) e.getObjectValue();
        logger.trace("Cached response: {}", cached);
        if (!e.isExpired()) {
            return store(event, cached, destination);
        } else {
            hostCache.remove(cached);
        }
    }
    Future<AddressedEnvelope<DnsResponse, InetSocketAddress>> future = resolver.query(dnsquery);
    throw new ProcessorException.PausedEventException(event, future);
}

Example 3 with DnsQuestion

use of io.netty.handler.codec.dns.DnsQuestion in project LogHub by fbacchella.

the class NettyNameResolver method warmUp.

/**
 * Used by test to warm up the cache
 * @param query
 * @param type
 * @return
 * @throws Throwable
 */
DnsRecord warmUp(String query, DnsRecordType type) throws Throwable {
    AddressedEnvelope<DnsResponse, InetSocketAddress> enveloppe = null;
    try {
        DnsQuestion dnsquery = new DefaultDnsQuestion(query, type);
        Future<AddressedEnvelope<DnsResponse, InetSocketAddress>> future = resolver.query(dnsquery);
        enveloppe = future.get();
        Element cachedEntry = new Element(makeKey(dnsquery), new DnsCacheEntry(enveloppe));
        hostCache.put(cachedEntry);
        return enveloppe.content().recordAt((DnsSection.ANSWER));
    } catch (ExecutionException e) {
        throw e.getCause();
    } finally {
        if (enveloppe != null) {
            enveloppe.release();
        }
    }
}

Example 4 with DnsQuestion

use of io.netty.handler.codec.dns.DnsQuestion in project LogHub by fbacchella.

the class NettyNameResolver method process.

@Override
public boolean process(Event ev, AddressedEnvelope<DnsResponse, InetSocketAddress> enveloppe, String destination) throws ProcessorException {
    try {
        DnsResponse response = enveloppe.content();
        DnsQuestion questionRr = (DnsQuestion) response.recordAt((DnsSection.QUESTION));
        DnsRecord answerRr = enveloppe.content().recordAt((DnsSection.ANSWER));
        DnsCacheEntry cached = new DnsCacheEntry(enveloppe);
        // Default to 5s on failure, just to avoid wild loop
        // Also check than the answerRR is not null, some servers are happy to return ok on failure
        int ttl = (response.code().intValue() == NOERROR && answerRr != null) ? (int) answerRr.timeToLive() : 5;
        Element cacheElement = new Element(makeKey(questionRr), cached, ttl / 2, ttl);
        hostCache.put(cacheElement);
        return store(ev, cached, destination);
    } finally {
        enveloppe.release();
    }
}

Example 5 with DnsQuestion

use of io.netty.handler.codec.dns.DnsQuestion in project netty by netty.

the class TcpDnsClient method handleQueryResp.

private static void handleQueryResp(DefaultDnsResponse msg) {
    if (msg.count(DnsSection.QUESTION) > 0) {
        DnsQuestion question = msg.recordAt(DnsSection.QUESTION, 0);
        System.out.printf("name: %s%n", question.name());
    }
    for (int i = 0, count = msg.count(DnsSection.ANSWER); i < count; i++) {
        DnsRecord record = msg.recordAt(DnsSection.ANSWER, i);
        if (record.type() == DnsRecordType.A) {
            // just print the IP after query
            DnsRawRecord raw = (DnsRawRecord) record;
            System.out.println(NetUtil.bytesToIpAddress(ByteBufUtil.getBytes(raw.content())));
        }
    }
}