diff options
Diffstat (limited to 'src/net/java/sip/communicator/impl/dns/UnboundResolver.java')
-rw-r--r-- | src/net/java/sip/communicator/impl/dns/UnboundResolver.java | 410 |
1 files changed, 0 insertions, 410 deletions
diff --git a/src/net/java/sip/communicator/impl/dns/UnboundResolver.java b/src/net/java/sip/communicator/impl/dns/UnboundResolver.java deleted file mode 100644 index 3f3d8c9..0000000 --- a/src/net/java/sip/communicator/impl/dns/UnboundResolver.java +++ /dev/null @@ -1,410 +0,0 @@ -/* - * Jitsi, the OpenSource Java VoIP and Instant Messaging client. - * - * Copyright @ 2015 Atlassian Pty Ltd - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ -package net.java.sip.communicator.impl.dns; - -import java.io.*; -import java.net.*; -import java.util.*; -import java.util.concurrent.*; - -import net.java.sip.communicator.service.dns.*; -import net.java.sip.communicator.util.*; - -import org.xbill.DNS.*; - -/** - * Implementation of the {@link Resolver} interface, wrapping the native NLnet - * Labs Unbound resolver. Only the basic methods for queries are supported. - * - * @author Ingo Bauersachs - */ -public class UnboundResolver - implements CustomResolver -{ - private final static Logger logger = - Logger.getLogger(UnboundResolver.class); - - /** - * Helper class to synchronize on asynchronous queries. - */ - private static class CallbackData - { - /** - * The resolver consumer that wishes to be informed when the request - * completed. - */ - ResolverListener listener; - - /** - * The unbound session context. - */ - long context; - - /** - * The ID of the unbound async query. - */ - int asyncId; - - /** - * Java synchronization on top of unbound. - */ - CountDownLatch sync = new CountDownLatch(1); - } - - /** - * Timeout for DNS queries. - */ - private int timeout = 10000; - - /** - * The recursive DNS servers answering our queries. - */ - private String[] forwarders; - - /** - * DNSSEC trust anchors for signed zones (usually for the root zone). - */ - private List<String> trustAnchors = new LinkedList<String>(); - - /** - * Pool that executes our queries. - */ - private ExecutorService threadPool; - - /** - * Creates a new instance of this class. - */ - public UnboundResolver() - { - threadPool = Executors.newCachedThreadPool(); - } - - /** - * Sets a list of forwarders to use instead of the system default. - * - * @param forwarders list of servers to use for our queries. - */ - public void setForwarders(String[] forwarders) - { - this.forwarders = forwarders; - } - - /** - * Clears any existing trust anchors previously added. - */ - public void clearTrustAnchors() - { - trustAnchors.clear(); - } - - /** - * Adds a DNSSEC trust anchor validation of the DNSKEYs. - * - * @param anchor trust anchor in the form of - * "'zone' IN DS 'key tag' 'algorithm' 'digest type' 'digest'" - */ - public void addTrustAnchor(String anchor) - { - trustAnchors.add(anchor); - } - - /** - * {@inheritDoc} - */ - public SecureMessage send(final Message query) throws IOException - { - Future<SecureMessage> future = threadPool.submit( - new Callable<SecureMessage>() - { - public SecureMessage call() throws Exception - { - if(logger.isDebugEnabled()) - logger.debug(query); - - SecureMessage secureMessage = null; - final long context = prepareContext(); - try - { - UnboundResult result = UnboundApi.resolve( - context, - query.getQuestion().getName().toString(), - query.getQuestion().getType(), - query.getQuestion().getDClass() - ); - secureMessage = new SecureMessage(result); - validateMessage(secureMessage); - } - finally - { - UnboundApi.deleteContext(context); - if(logger.isDebugEnabled() && secureMessage != null) - logger.debug(secureMessage); - } - - return secureMessage; - } - }); - try - { - return future.get(timeout, TimeUnit.SECONDS); - } - catch (InterruptedException e) - { - logger.error(e); - throw new IOException(e.getMessage()); - } - catch (ExecutionException e) - { - if(e.getCause() instanceof DnssecRuntimeException) - throw new DnssecRuntimeException(e.getCause().getMessage()); - logger.error(e); - throw new IOException(e.getMessage()); - } - catch (TimeoutException e) - { - throw new SocketTimeoutException(e.getMessage()); - } - } - - /** - * Method to allow overriders to inspect the message. This class' - * implementation does nothing. - * - * @param msg The message to inspect. - * @throws DnssecRuntimeException if the inspector does not want the code to - * continue normal processing of the answer. - */ - protected void validateMessage(SecureMessage msg) - throws DnssecRuntimeException - { - } - - /** - * Prepares a unbound session context initialized with forwarders and trust - * anchors. - * - * @return The context id - */ - private long prepareContext() - { - final long context = UnboundApi.createContext(); - if(logger.isTraceEnabled()) - UnboundApi.setDebugLevel(context, 100); - for(String fwd : forwarders == null - ? ResolverConfig.getCurrentConfig().servers() - : forwarders) - { - fwd = fwd.trim(); - if(NetworkUtils.isValidIPAddress(fwd)) - { - if(fwd.startsWith("[")) - fwd = fwd.substring(1, fwd.length() - 1); - UnboundApi.setForwarder(context, fwd); - } - } - for(String anchor : trustAnchors) - { - UnboundApi.addTrustAnchor(context, anchor); - } - return context; - } - - /** - * Cleans up an Unbound session context. - * - * @param cbData The helper object of the asynchronous call. - * @param cancelAsync Whether an outstanding asynchronous unbound query - * should be canceled. - */ - private static synchronized void deleteContext(CallbackData cbData, - boolean cancelAsync) - { - if(cbData.context == 0) - return; - - if(cancelAsync) - { - try - { - UnboundApi.cancelAsync(cbData.context, cbData.asyncId); - } - catch (UnboundException ignore) - {} - } - UnboundApi.deleteContext(cbData.context); - cbData.context = 0; - } - - /* - * (non-Javadoc) - * - * @see org.xbill.DNS.Resolver#sendAsync(org.xbill.DNS.Message, - * org.xbill.DNS.ResolverListener) - */ - public CallbackData sendAsync(Message query, ResolverListener listener) - { - if(listener == null) - throw new IllegalArgumentException("listener cannot be null"); - - final long context = prepareContext(); - final CallbackData cbData = new CallbackData(); - cbData.listener = listener; - cbData.context = context; - int asyncId; - try - { - asyncId = UnboundApi.resolveAsync( - context, - query.getQuestion().getName().toString(), - query.getQuestion().getType(), - query.getQuestion().getDClass(), - cbData, - new UnboundApi.UnboundCallback() - { - public void UnboundResolveCallback(Object data, int err, - UnboundResult result) - { - CallbackData cbData = (CallbackData)data; - deleteContext(cbData, false); - - ResolverListener l = cbData.listener; - if(err == 0) - { - try - { - l.receiveMessage(data, - new SecureMessage(result)); - } - catch (IOException e) - { - l.handleException(data, e); - } - } - else - l.handleException(data, - new Exception( - UnboundApi.errorCodeToString(err))); - - cbData.sync.countDown(); - } - } - ); - } - catch (UnboundException e) - { - listener.handleException(null, e); - return null; - } - cbData.asyncId = asyncId; - threadPool.execute(new Runnable() - { - public void run() - { - try - { - UnboundApi.processAsync(context); - } - catch(UnboundException ex) - { - cbData.listener.handleException(this, ex); - deleteContext(cbData, false); - cbData.sync.countDown(); - } - } - }); - return cbData; - } - - /** - * Not supported. - * @throws UnsupportedOperationException - */ - public void setEDNS(int level) - { - throw new UnsupportedOperationException(); - } - - /** - * Not supported. - * @throws UnsupportedOperationException - */ - @SuppressWarnings("rawtypes") - public void setEDNS(int level, int payloadSize, int flags, List options) - { - throw new UnsupportedOperationException(); - } - - /** - * Not supported. - * @throws UnsupportedOperationException - */ - public void setIgnoreTruncation(boolean flag) - { - throw new UnsupportedOperationException(); - } - - /** - * Not supported. - * @throws UnsupportedOperationException - */ - public void setPort(int port) - { - throw new UnsupportedOperationException(); - } - - /** - * Not supported. - * @throws UnsupportedOperationException - */ - public void setTCP(boolean flag) - { - throw new UnsupportedOperationException(); - } - - /** - * Not supported. - * @throws UnsupportedOperationException - */ - public void setTSIGKey(TSIG key) - { - throw new UnsupportedOperationException(); - } - - /* (non-Javadoc) - * @see org.xbill.DNS.Resolver#setTimeout(int) - */ - public void setTimeout(int secs) - { - timeout = secs * 1000; - } - - /* (non-Javadoc) - * @see org.xbill.DNS.Resolver#setTimeout(int, int) - */ - public void setTimeout(int secs, int msecs) - { - timeout = secs * 1000 + msecs; - } - - /** - * Does nothing. - */ - public void reset() - { - } -} |