Example usage for io.netty.handler.codec.dns DnsResponseCode NXDOMAIN

Introduction

In this page you can find the example usage for io.netty.handler.codec.dns DnsResponseCode NXDOMAIN.

Prototype

DnsResponseCode NXDOMAIN

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Document

The 'NXDomain' DNS RCODE (3), as defined in <a href="https://tools.ietf.org/html/rfc1035">RFC1035</a>.

Usage

From source file:io.vertx.core.dns.impl.fix.DnsNameResolverContext.java

License:Apache License

void onResponse(final DnsQuestion question, AddressedEnvelope<DnsResponse, InetSocketAddress> envelope) {
    try {//from w  w w .  ja v a 2  s  . c  o m
        final DnsResponse res = envelope.content();
        final DnsResponseCode code = res.code();
        if (code == DnsResponseCode.NOERROR) {
            final DnsRecordType type = question.type();
            if (type == DnsRecordType.A || type == DnsRecordType.AAAA) {
                onResponseAorAAAA(type, question, envelope);
            } else if (type == DnsRecordType.CNAME) {
                onResponseCNAME(question, envelope);
            }
            return;
        }

        if (traceEnabled) {
            addTrace(envelope.sender(), "response code: " + code + " with " + res.count(DnsSection.ANSWER)
                    + " answer(s) and " + res.count(DnsSection.AUTHORITY) + " authority resource(s)");
        }

        // Retry with the next server if the server did not tell us that the domain does not exist.
        if (code != DnsResponseCode.NXDOMAIN) {
            query(nameServerAddrs.next(), question);
        }
    } finally {
        ReferenceCountUtil.safeRelease(envelope);
    }
}

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