List of usage examples for io.netty.handler.codec.dns DnsResponse code
DnsResponseCode code();
From source file:io.vertx.core.dns.impl.DnsClientImpl.java
License:Open Source License
@SuppressWarnings("unchecked") private <T> void lookup(String name, Future<List<T>> result, DnsRecordType... types) { Objects.requireNonNull(name, "no null name accepted"); bootstrap.connect(dnsServer).addListener(new RetryChannelFutureListener(result) { @Override//from w w w . jav a2 s. c o m public void onSuccess(ChannelFuture future) throws Exception { DatagramDnsQuery query = new DatagramDnsQuery(null, dnsServer, ThreadLocalRandom.current().nextInt()); for (DnsRecordType type : types) { query.addRecord(DnsSection.QUESTION, new DefaultDnsQuestion(name, type, DnsRecord.CLASS_IN)); } future.channel().writeAndFlush(query).addListener(new RetryChannelFutureListener(result) { @Override public void onSuccess(ChannelFuture future) throws Exception { future.channel().pipeline().addLast(new SimpleChannelInboundHandler<DnsResponse>() { @Override protected void channelRead0(ChannelHandlerContext ctx, DnsResponse msg) throws Exception { DnsResponseCode code = DnsResponseCode.valueOf(msg.code().intValue()); if (code == DnsResponseCode.NOERROR) { int count = msg.count(DnsSection.ANSWER); List<T> records = new ArrayList<>(count); for (int idx = 0; idx < count; idx++) { DnsRecord a = msg.recordAt(DnsSection.ANSWER, idx); T record = RecordDecoder.decode(a); if (isRequestedType(a.type(), types)) { records.add(record); } } if (records.size() > 0 && (records.get(0) instanceof MxRecordImpl || records.get(0) instanceof SrvRecordImpl)) { Collections.sort((List) records); } setResult(result, records); } else { setFailure(result, new DnsException(code)); } ctx.close(); } private boolean isRequestedType(DnsRecordType dnsRecordType, DnsRecordType[] types) { for (DnsRecordType t : types) { if (t.equals(dnsRecordType)) { return true; } } return false; } @Override public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception { setFailure(result, cause); ctx.close(); } }); } }); } }); }
From source file:io.vertx.core.dns.impl.fix.DnsNameResolverContext.java
License:Apache License
void onResponse(final DnsQuestion question, AddressedEnvelope<DnsResponse, InetSocketAddress> envelope) { try {/* ww w . j a v a 2s. 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); } }