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

Example 6 with Question

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

the class IterativeDNSClient method resolveIpRecursive.

private IpResultSet resolveIpRecursive(ResolutionState resolutionState, DNSName name) throws IOException {
    IpResultSet.Builder res = newIpResultSetBuilder();
    if (ipVersionSetting.v4) {
        // TODO Try to retrieve A records for name out from cache.
        Question question = new Question(name, TYPE.A);
        final DNSMessage query = getQueryFor(question);
        DNSMessage aMessage = queryRecursive(resolutionState, query);
        if (aMessage != null) {
            for (Record<? extends Data> answer : aMessage.answerSection) {
                if (answer.isAnswer(question)) {
                    InetAddress inetAddress = inetAddressFromRecord(name.ace, (A) answer.payloadData);
                    res.ipv4Addresses.add(inetAddress);
                } else if (answer.type == TYPE.CNAME && answer.name.equals(name)) {
                    return resolveIpRecursive(resolutionState, ((RRWithTarget) answer.payloadData).target);
                }
            }
        }
    }
    if (ipVersionSetting.v6) {
        // TODO Try to retrieve AAAA records for name out from cache.
        Question question = new Question(name, TYPE.AAAA);
        final DNSMessage query = getQueryFor(question);
        DNSMessage aMessage = queryRecursive(resolutionState, query);
        if (aMessage != null) {
            for (Record<? extends Data> answer : aMessage.answerSection) {
                if (answer.isAnswer(question)) {
                    InetAddress inetAddress = inetAddressFromRecord(name.ace, (AAAA) answer.payloadData);
                    res.ipv6Addresses.add(inetAddress);
                } else if (answer.type == TYPE.CNAME && answer.name.equals(name)) {
                    return resolveIpRecursive(resolutionState, ((RRWithTarget) answer.payloadData).target);
                }
            }
        }
    }
    return res.build();
}

Example 7 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) throws IOException {
    InetAddress primaryTarget = null, secondaryTarget = null;
    Question question = q.getQuestion();
    DNSName parent = question.name.getParent();
    switch(ipVersionSetting) {
        case v4only:
            for (A a : getCachedIPv4NameserverAddressesFor(parent)) {
                if (primaryTarget == null) {
                    primaryTarget = a.getInetAddress();
                    continue;
                }
                secondaryTarget = a.getInetAddress();
                break;
            }
            break;
        case v6only:
            for (AAAA aaaa : getCachedIPv6NameserverAddressesFor(parent)) {
                if (primaryTarget == null) {
                    primaryTarget = aaaa.getInetAddress();
                    continue;
                }
                secondaryTarget = aaaa.getInetAddress();
                break;
            }
            break;
        case v4v6:
            InetAddress[] v4v6targets = getTargets(getCachedIPv4NameserverAddressesFor(parent), getCachedIPv6NameserverAddressesFor(parent));
            primaryTarget = v4v6targets[0];
            secondaryTarget = v4v6targets[1];
            break;
        case v6v4:
            InetAddress[] v6v4targets = getTargets(getCachedIPv6NameserverAddressesFor(parent), getCachedIPv4NameserverAddressesFor(parent));
            primaryTarget = v6v4targets[0];
            secondaryTarget = v6v4targets[1];
            break;
        default:
            throw new AssertionError();
    }
    DNSName authoritativeZone = parent;
    if (primaryTarget == null) {
        authoritativeZone = DNSName.ROOT;
        switch(ipVersionSetting) {
            case v4only:
                primaryTarget = getRandomIpv4RootServer();
                break;
            case v6only:
                primaryTarget = getRandomIpv6RootServer();
                break;
            case v4v6:
                primaryTarget = getRandomIpv4RootServer();
                secondaryTarget = getRandomIpv6RootServer();
                break;
            case v6v4:
                primaryTarget = getRandomIpv6RootServer();
                secondaryTarget = getRandomIpv4RootServer();
                break;
        }
    }
    List<IOException> ioExceptions = new LinkedList<>();
    try {
        return queryRecursive(resolutionState, q, primaryTarget, authoritativeZone);
    } catch (IOException ioException) {
        abortIfFatal(ioException);
        ioExceptions.add(ioException);
    }
    if (secondaryTarget != null) {
        try {
            return queryRecursive(resolutionState, q, secondaryTarget, authoritativeZone);
        } catch (IOException ioException) {
            ioExceptions.add(ioException);
        }
    }
    MultipleIoException.throwIfRequired(ioExceptions);
    return null;
}

Example 8 with Question

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

the class DNSMessageTest method testFilledMessageToString.

@Test
public void testFilledMessageToString() throws Exception {
    // toString() should never throw an exception or be null
    DNSMessage.Builder message = DNSMessage.builder();
    message.setOpcode(DNSMessage.OPCODE.QUERY);
    message.setResponseCode(DNSMessage.RESPONSE_CODE.NO_ERROR);
    message.setId(1337);
    message.setAuthoritativeAnswer(true);
    message.addQuestion(new Question("www.example.com", TYPE.A));
    message.addAnswer(record("www.example.com", a("127.0.0.1")));
    message.addNameserverRecords(record("example.com", ns("ns.example.com")));
    message.addAdditionalResourceRecord(record("ns.example.com", a("127.0.0.1")));
    message.getEdnsBuilder().setUdpPayloadSize(512);
    assertNotNull(message.build().toString());
}

Example 9 with Question

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

the class DNSMessageTest method testFilledMessageTerminalOutput.

@Test
public void testFilledMessageTerminalOutput() throws Exception {
    // asTerminalOutput() follows a certain design, however it might change in the future.
    // Once asTerminalOutput() is changed, it might be required to update this test routine.
    DNSMessage.Builder message = DNSMessage.builder();
    message.setOpcode(DNSMessage.OPCODE.QUERY);
    message.setResponseCode(DNSMessage.RESPONSE_CODE.NO_ERROR);
    message.setId(1337);
    message.setAuthoritativeAnswer(true);
    message.addQuestion(new Question("www.example.com", TYPE.A));
    message.addAnswer(record("www.example.com", a("127.0.0.1")));
    message.addNameserverRecords(record("example.com", ns("ns.example.com")));
    message.addAdditionalResourceRecord(record("ns.example.com", a("127.0.0.1")));
    message.getEdnsBuilder().setUdpPayloadSize(512);
    assertNotNull(message.build().asTerminalOutput());
}

Example 10 with Question

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

the class DNSSECClient method verifyAnswer.

private Set<UnverifiedReason> verifyAnswer(DNSMessage dnsMessage) throws IOException {
    Question q = dnsMessage.questions.get(0);
    List<Record<? extends Data>> answers = dnsMessage.answerSection;
    List<Record<? extends Data>> toBeVerified = dnsMessage.copyAnswers();
    VerifySignaturesResult verifiedSignatures = verifySignatures(q, answers, toBeVerified);
    Set<UnverifiedReason> result = verifiedSignatures.reasons;
    if (!result.isEmpty()) {
        return result;
    }
    // Keep SEPs separated, we only need one valid SEP.
    boolean sepSignatureValid = false;
    Set<UnverifiedReason> sepReasons = new HashSet<>();
    for (Iterator<Record<? extends Data>> iterator = toBeVerified.iterator(); iterator.hasNext(); ) {
        Record<DNSKEY> record = iterator.next().ifPossibleAs(DNSKEY.class);
        if (record == null) {
            continue;
        }
        // Verify all DNSKEYs as if it was a SEP. If we find a single SEP we are safe.
        Set<UnverifiedReason> reasons = verifySecureEntryPoint(q, record);
        if (reasons.isEmpty()) {
            sepSignatureValid = true;
        } else {
            sepReasons.addAll(reasons);
        }
        if (!verifiedSignatures.sepSignaturePresent) {
            LOGGER.finer("SEP key is not self-signed.");
        }
        iterator.remove();
    }
    if (verifiedSignatures.sepSignaturePresent && !sepSignatureValid) {
        result.addAll(sepReasons);
    }
    if (verifiedSignatures.sepSignatureRequired && !verifiedSignatures.sepSignaturePresent) {
        result.add(new NoSecureEntryPointReason(q.name.ace));
    }
    if (!toBeVerified.isEmpty()) {
        if (toBeVerified.size() != answers.size()) {
            throw new DNSSECValidationFailedException(q, "Only some records are signed!");
        } else {
            result.add(new NoSignaturesReason(q));
        }
    }
    return result;
}