728 lines
27 KiB
Java
728 lines
27 KiB
Java
/**
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*
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* Copyright 2017 Paul Schaub
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.jivesoftware.smackx.jingle.component;
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import java.util.Collections;
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import java.util.HashSet;
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import java.util.Set;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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import org.jivesoftware.smack.SmackException;
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import org.jivesoftware.smack.XMPPConnection;
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import org.jivesoftware.smack.XMPPException;
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import org.jivesoftware.smack.packet.IQ;
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import org.jivesoftware.smack.packet.XMPPError;
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import org.jivesoftware.smack.util.Async;
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import org.jivesoftware.smack.util.StringUtils;
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import org.jivesoftware.smackx.bytestreams.BytestreamSession;
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import org.jivesoftware.smackx.jingle.JingleManager;
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import org.jivesoftware.smackx.jingle.JingleTransportManager;
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import org.jivesoftware.smackx.jingle.adapter.JingleDescriptionAdapter;
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import org.jivesoftware.smackx.jingle.adapter.JingleSecurityAdapter;
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import org.jivesoftware.smackx.jingle.adapter.JingleTransportAdapter;
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import org.jivesoftware.smackx.jingle.callback.JingleSecurityCallback;
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import org.jivesoftware.smackx.jingle.callback.JingleTransportCallback;
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import org.jivesoftware.smackx.jingle.element.JingleContentDescriptionElement;
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import org.jivesoftware.smackx.jingle.element.JingleContentElement;
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import org.jivesoftware.smackx.jingle.element.JingleContentSecurityElement;
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import org.jivesoftware.smackx.jingle.element.JingleContentTransportElement;
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import org.jivesoftware.smackx.jingle.element.JingleElement;
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import org.jivesoftware.smackx.jingle.element.JingleReasonElement;
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/**
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* Internal class that holds the state of a content in a modifiable form.
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*/
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public class JingleContent implements JingleTransportCallback, JingleSecurityCallback {
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private static final Logger LOGGER = Logger.getLogger(JingleContent.class.getName());
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private final JingleContentElement.Creator creator;
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private final String name;
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private final String disposition;
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private JingleSession parent;
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private JingleContentElement.Senders senders;
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private JingleDescription<?> description;
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private JingleTransport<?> transport;
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private JingleSecurity<?> security;
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private JingleTransport<?> pendingReplacingTransport = null;
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private final Set<String> transportBlacklist = Collections.synchronizedSet(new HashSet<String>());
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/**
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* Create an empty JingleContent with random name.
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* @param creator creator.
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* @param senders sender.
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*/
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public JingleContent(JingleContentElement.Creator creator, JingleContentElement.Senders senders) {
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this(null, null, null, randomName(), null, creator, senders);
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}
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/**
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* Create a JingleContent.
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* @param description description component.
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* @param transport transport component.
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* @param security security component.
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* @param name content name.
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* @param disposition disposition.
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* @param creator creator.
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* @param senders senders.
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*/
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public JingleContent(JingleDescription<?> description, JingleTransport<?> transport, JingleSecurity<?> security, String name, String disposition, JingleContentElement.Creator creator, JingleContentElement.Senders senders) {
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setDescription(description);
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setTransport(transport);
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setSecurity(security);
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this.name = name;
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this.disposition = disposition;
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this.creator = creator;
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this.senders = senders;
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}
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/**
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* Create a new JingleContent from a {@link JingleContentElement}.
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* @param content contentElement.
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* @return jingleContent.
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*/
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public static JingleContent fromElement(JingleContentElement content) {
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JingleDescription<?> description = null;
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JingleTransport<?> transport = null;
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JingleSecurity<?> security = null;
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JingleContentDescriptionElement descriptionElement = content.getDescription();
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if (descriptionElement != null) {
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JingleDescriptionAdapter<?> descriptionAdapter = JingleManager.getJingleDescriptionAdapter(content.getDescription().getNamespace());
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if (descriptionAdapter != null) {
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description = descriptionAdapter.descriptionFromElement(content.getCreator(), content.getSenders(), content.getName(), content.getDisposition(), descriptionElement);
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} else {
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throw new AssertionError("Unsupported Description: " + descriptionElement.getNamespace());
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}
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}
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JingleContentTransportElement transportElement = content.getTransport();
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if (transportElement != null) {
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JingleTransportAdapter<?> transportAdapter = JingleManager.getJingleTransportAdapter(content.getTransport().getNamespace());
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if (transportAdapter != null) {
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transport = transportAdapter.transportFromElement(transportElement);
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} else {
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throw new AssertionError("Unsupported Transport: " + transportElement.getNamespace());
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}
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}
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JingleContentSecurityElement securityElement = content.getSecurity();
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if (securityElement != null) {
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JingleSecurityAdapter<?> securityAdapter = JingleManager.getJingleSecurityAdapter(content.getSecurity().getNamespace());
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if (securityAdapter != null) {
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security = securityAdapter.securityFromElement(securityElement);
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} else {
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throw new AssertionError("Unsupported Security: " + securityElement.getNamespace());
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}
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}
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return new JingleContent(description, transport, security, content.getName(), content.getDisposition(), content.getCreator(), content.getSenders());
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}
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/**
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* Set the senders attribute.
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* @param senders new value.
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*/
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public void setSenders(JingleContentElement.Senders senders) {
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this.senders = senders;
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}
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/* HANDLE_XYZ */
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/**
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* Handle an incoming jingle request. This method basically routes incoming requests to different methods based on
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* the value of the request's action attribute.
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* @param request request.
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* @param connection connection.
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* @return result.
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*/
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public IQ handleJingleRequest(JingleElement request, XMPPConnection connection) {
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switch (request.getAction()) {
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case content_modify:
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return handleContentModify(request, connection);
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case description_info:
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return handleDescriptionInfo(request, connection);
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case security_info:
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return handleSecurityInfo(request, connection);
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case session_info:
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return handleSessionInfo(request, connection);
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case transport_accept:
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return handleTransportAccept(request, connection);
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case transport_info:
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return handleTransportInfo(request, connection);
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case transport_reject:
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return handleTransportReject(request, connection);
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case transport_replace:
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return handleTransportReplace(request, connection);
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default:
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throw new AssertionError("Illegal jingle action: " + request.getAction() + " is not allowed here.");
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}
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}
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/**
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* Handle incoming content-accept.
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* @param request request.
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* @param connection connection.
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*/
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void handleContentAccept(JingleElement request, XMPPConnection connection) {
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LOGGER.log(Level.FINE, "Received content-accept from " + request.getFrom() + " for session " + request.getSid() + " and content " + getName());
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start(connection);
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}
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/**
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* Handle incoming session-accept. This means activating the transport and starting the transmission.
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* @param request request.
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* @param connection connection.
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* @return result.
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*/
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IQ handleSessionAccept(JingleElement request, XMPPConnection connection) {
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LOGGER.log(Level.FINE, "Received session-accept from " + request.getResponder() + " for session " + request.getSid());
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JingleContentElement contentElement = null;
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for (JingleContentElement c : request.getContents()) {
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if (c.getName().equals(getName())) {
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contentElement = c;
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break;
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}
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}
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if (contentElement == null) {
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throw new AssertionError("Session Accept did not contain this content.");
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}
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getTransport().handleSessionAccept(contentElement.getTransport(), connection);
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start(connection);
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return IQ.createResultIQ(request);
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}
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/**
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* Handle a content-modify request.
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* TODO: Implement.
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* @param request request.
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* @param connection connection.
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* @return result.
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*/
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private IQ handleContentModify(JingleElement request, XMPPConnection connection) {
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return IQ.createErrorResponse(request, XMPPError.Condition.feature_not_implemented);
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}
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/**
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* Handle a description-info request.
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* TODO: Implement.
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* @param request request.
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* @param connection connection.
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* @return result.
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*/
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private IQ handleDescriptionInfo(JingleElement request, XMPPConnection connection) {
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return IQ.createErrorResponse(request, XMPPError.Condition.feature_not_implemented);
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//return description.handleDescriptionInfo(request.getContents().get(0).getDescription().getDescriptionInfo());
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}
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/**
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* Handle a content-remove request.
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* TODO: Implement.
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* @param session session that has this content as child.
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* @param connection connection.
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*/
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public void handleContentRemove(JingleSession session, XMPPConnection connection) {
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}
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/**
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* Handle security-info requests.
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* TODO: Implement.
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* @param request request.
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* @param connection connection.
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* @return result.
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*/
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private IQ handleSecurityInfo(JingleElement request, XMPPConnection connection) {
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return IQ.createErrorResponse(request, XMPPError.Condition.feature_not_implemented);
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}
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/**
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* Handle session-info requests.
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* TODO: Implement.
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* @param request request.
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* @param connection connection.
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* @return result.
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*/
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private IQ handleSessionInfo(JingleElement request, XMPPConnection connection) {
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return IQ.createResultIQ(request);
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}
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/**
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* Handle transport-accept requests.
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* This includes starting the transport and afterwards starting transmission.
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* @param request request.
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* @param connection connection.
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* @return result.
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*/
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private IQ handleTransportAccept(JingleElement request, XMPPConnection connection) {
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if (pendingReplacingTransport == null) {
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LOGGER.log(Level.WARNING, "Received transport-accept, but apparently we did not try to replace the transport.");
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return JingleElement.createJingleErrorOutOfOrder(request);
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}
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transport = pendingReplacingTransport;
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pendingReplacingTransport = null;
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start(connection);
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return IQ.createResultIQ(request);
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}
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/**
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* Handle transport-info requests.
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* Pass the request down to the transport.
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* @param request request.
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* @param connection connection.
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* @return result.
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*/
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private IQ handleTransportInfo(JingleElement request, XMPPConnection connection) {
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assert request.getContents().size() == 1;
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JingleContentElement content = request.getContents().get(0);
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return transport.handleTransportInfo(content.getTransport().getInfo(), request);
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}
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/**
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* Handle a transport-reject request.
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* That includes replacing the transport with the next choice.
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* @param request request.
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* @param connection connection.
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* @return result.
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*/
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private IQ handleTransportReject(JingleElement request, final XMPPConnection connection) {
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if (pendingReplacingTransport == null) {
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LOGGER.log(Level.WARNING, "Received transport-reject, but apparently we did not try to replace the transport.");
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return JingleElement.createJingleErrorOutOfOrder(request);
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}
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Async.go(new Runnable() {
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@Override
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public void run() {
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transportBlacklist.add(pendingReplacingTransport.getNamespace());
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pendingReplacingTransport = null;
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try {
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replaceTransport(transportBlacklist, connection);
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} catch (SmackException.NotConnectedException | SmackException.NoResponseException | XMPPException.XMPPErrorException | InterruptedException e) {
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LOGGER.log(Level.SEVERE, "Could not replace transport.", e);
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}
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}
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});
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return IQ.createResultIQ(request);
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}
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/**
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* Handle a transport-replace request.
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* That includes replacing the transport if suitable and starting the transmission.
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* Otherwise reject the transport.
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* @param request request.
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* @param connection connection.
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* @return result.
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*/
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private IQ handleTransportReplace(final JingleElement request, final XMPPConnection connection) {
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//Tie Break?
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if (pendingReplacingTransport != null) {
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Async.go(new Runnable() {
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@Override
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public void run() {
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try {
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connection.createStanzaCollectorAndSend(JingleElement.createJingleErrorTieBreak(request))
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.nextResultOrThrow();
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} catch (SmackException.NoResponseException | SmackException.NotConnectedException |
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InterruptedException | XMPPException.XMPPErrorException e) {
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LOGGER.log(Level.SEVERE, "Could not send tie-break.", e);
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}
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}
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});
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return IQ.createResultIQ(request);
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}
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JingleContentElement contentElement = null;
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for (JingleContentElement c : request.getContents()) {
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if (c.getName().equals(getName())) {
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contentElement = c;
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break;
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}
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}
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if (contentElement == null) {
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throw new AssertionError("Unknown content");
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}
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final JingleSession session = getParent();
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final JingleContentTransportElement transportElement = contentElement.getTransport();
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JingleTransportManager tm = session.getJingleManager().getTransportManager(transportElement.getNamespace());
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// Unsupported/Blacklisted transport -> reject.
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if (tm == null || getTransportBlacklist().contains(transportElement.getNamespace())) {
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Async.go(new Runnable() {
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@Override
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public void run() {
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JingleElement reject = JingleElement.createTransportReject(session.getOurJid(),
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session.getPeer(), session.getSessionId(), getCreator(), getName(), transportElement);
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try {
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connection.createStanzaCollectorAndSend(reject).nextResultOrThrow();
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} catch (SmackException.NotConnectedException | InterruptedException |
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XMPPException.XMPPErrorException | SmackException.NoResponseException e) {
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LOGGER.log(Level.SEVERE, "Could not send transport-reject.", e);
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}
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}
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});
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} else {
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//Blacklist current transport
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this.getTransportBlacklist().add(this.transport.getNamespace());
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this.transport = tm.createTransportForResponder(this, transportElement);
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Async.go(new Runnable() {
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@Override
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public void run() {
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JingleElement accept = JingleElement.createTransportAccept(session.getOurJid(), session.getPeer(), session.getSessionId(), getCreator(), getName(), transport.getElement());
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try {
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getParent().getJingleManager().getConnection().createStanzaCollectorAndSend(accept).nextResultOrThrow();
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} catch (SmackException.NotConnectedException | InterruptedException | XMPPException.XMPPErrorException | SmackException.NoResponseException e) {
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LOGGER.log(Level.SEVERE, "Could not send transport-accept.", e);
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}
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}
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});
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start(connection);
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}
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return IQ.createResultIQ(request);
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}
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/* MISCELLANEOUS */
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/**
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* Return a {@link JingleContentElement} representing this {@link JingleContent}.
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* @return contentElement.
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*/
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public JingleContentElement getElement() {
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JingleContentElement.Builder builder = JingleContentElement.getBuilder()
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.setName(name)
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.setCreator(creator)
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.setSenders(senders)
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.setDisposition(disposition);
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if (description != null) {
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builder.setDescription(description.getElement());
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}
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if (transport != null) {
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builder.setTransport(transport.getElement());
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}
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if (security != null) {
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builder.setSecurity(security.getElement());
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}
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return builder.build();
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}
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/**
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* Return the transportBlacklist of this content.
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* The blacklist contains the namespaces of {@link JingleTransport} classes, that this content will not offer/accept.
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* @return transport blacklist.
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*/
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public Set<String> getTransportBlacklist() {
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return transportBlacklist;
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}
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/**
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* Get the creator of the content. The creator is the party that added the content to the session.
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* @return creator.
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*/
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public JingleContentElement.Creator getCreator() {
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return creator;
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}
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/**
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* Get the name of the content.
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* @return content-name.
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*/
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public String getName() {
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return name;
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}
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/**
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* Get the senders of the content.
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* @return senders.
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*/
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public JingleContentElement.Senders getSenders() {
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return senders;
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}
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/**
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* Set the parent {@link JingleSession} of the content.
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* @param session session that has this content as child.
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*/
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public void setParent(JingleSession session) {
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if (this.parent != session) {
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this.parent = session;
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}
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}
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/**
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* Return the parent {@link JingleSession} of this content.
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* @return parent session.
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*/
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public JingleSession getParent() {
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return parent;
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}
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/**
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* Return the {@link JingleDescription} of this content.
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* @return jingle description component.
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*/
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public JingleDescription<?> getDescription() {
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return description;
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}
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/**
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* Set the {@link JingleDescription} of this content.
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* If needed, set the parent of the description to this content.
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* @param description jingle description component.
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*/
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public void setDescription(JingleDescription<?> description) {
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if (description != null && this.description != description) {
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this.description = description;
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description.setParent(this);
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}
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}
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/**
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* Return the {@link JingleTransport} of this content.
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* @return jingle transport component.
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*/
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public JingleTransport<?> getTransport() {
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return transport;
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}
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/**
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* Set the {@link JingleTransport} of this content.
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* If needed, set the parent of the transport component to this content.
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* @param transport jingle transport component.
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*/
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public void setTransport(JingleTransport<?> transport) {
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if (transport != null && this.transport != transport) {
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this.transport = transport;
|
|
transport.setParent(this);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return the {@link JingleSecurity} of this content.
|
|
* @return jingle security component.
|
|
*/
|
|
public JingleSecurity<?> getSecurity() {
|
|
return security;
|
|
}
|
|
|
|
/**
|
|
* Set the {@link JingleSecurity} of this content.
|
|
* If needed, set the parent of the security component to this content.
|
|
* @param security jingle security component.
|
|
*/
|
|
public void setSecurity(JingleSecurity<?> security) {
|
|
if (security != null && this.security != security) {
|
|
this.security = security;
|
|
security.setParent(this);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Return true, if we are the sending party. Otherwise return false.
|
|
* @return true if we are sending.
|
|
*/
|
|
public boolean isSending() {
|
|
return (getSenders() == JingleContentElement.Senders.initiator && getParent().isInitiator()) ||
|
|
(getSenders() == JingleContentElement.Senders.responder && getParent().isResponder()) ||
|
|
getSenders() == JingleContentElement.Senders.both;
|
|
}
|
|
|
|
/**
|
|
* Return true if we are the receiving party. Otherwise return false.
|
|
* @return true if we are receiving.
|
|
*/
|
|
public boolean isReceiving() {
|
|
return (getSenders() == JingleContentElement.Senders.initiator && getParent().isResponder()) ||
|
|
(getSenders() == JingleContentElement.Senders.responder && getParent().isInitiator()) ||
|
|
getSenders() == JingleContentElement.Senders.both;
|
|
}
|
|
|
|
/**
|
|
* Prepare the security component (if any) and establish a bytestream session.
|
|
* @param connection connection
|
|
*/
|
|
public void start(final XMPPConnection connection) {
|
|
transport.prepare(connection);
|
|
|
|
if (security != null) {
|
|
security.prepare(connection, getParent().getPeer());
|
|
}
|
|
|
|
//Establish transport
|
|
Async.go(new Runnable() {
|
|
@Override
|
|
public void run() {
|
|
try {
|
|
if (isReceiving()) {
|
|
LOGGER.log(Level.FINE, "Establish incoming bytestream.");
|
|
getTransport().establishIncomingBytestreamSession(connection, JingleContent.this, getParent());
|
|
} else if (isSending()) {
|
|
LOGGER.log(Level.FINE, "Establish outgoing bytestream.");
|
|
getTransport().establishOutgoingBytestreamSession(connection, JingleContent.this, getParent());
|
|
} else {
|
|
LOGGER.log(Level.FINE, "Neither receiving, nor sending. Assume receiving.");
|
|
getTransport().establishIncomingBytestreamSession(connection, JingleContent.this, getParent());
|
|
}
|
|
} catch (SmackException.NotConnectedException | InterruptedException e) {
|
|
LOGGER.log(Level.SEVERE, "Error establishing connection.", e);
|
|
}
|
|
}
|
|
});
|
|
}
|
|
|
|
@Override
|
|
public void onTransportReady(BytestreamSession bytestreamSession) {
|
|
LOGGER.log(Level.FINE, "TransportReady: " + (isReceiving() ? "Receive" : "Send"));
|
|
if (bytestreamSession == null) {
|
|
throw new AssertionError("bytestreamSession MUST NOT be null at this point.");
|
|
}
|
|
|
|
if (security != null) {
|
|
if (isReceiving()) {
|
|
LOGGER.log(Level.FINE, "Decrypt incoming Bytestream.");
|
|
getSecurity().decryptIncomingBytestream(bytestreamSession, this);
|
|
} else if (isSending()) {
|
|
LOGGER.log(Level.FINE, "Encrypt outgoing Bytestream.");
|
|
getSecurity().encryptOutgoingBytestream(bytestreamSession, this);
|
|
}
|
|
} else {
|
|
description.onBytestreamReady(bytestreamSession);
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public void onTransportFailed(Exception e) {
|
|
//Add current transport to blacklist.
|
|
getTransportBlacklist().add(transport.getNamespace());
|
|
|
|
//Replace transport.
|
|
if (getParent().isInitiator()) {
|
|
try {
|
|
replaceTransport(getTransportBlacklist(), getParent().getJingleManager().getConnection());
|
|
} catch (SmackException.NotConnectedException | InterruptedException | SmackException.NoResponseException | XMPPException.XMPPErrorException e1) {
|
|
LOGGER.log(Level.SEVERE, "Could not send transport-replace.", e);
|
|
}
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public void onSecurityReady(BytestreamSession bytestreamSession) {
|
|
getDescription().onBytestreamReady(bytestreamSession);
|
|
}
|
|
|
|
@Override
|
|
public void onSecurityFailed(Exception e) {
|
|
LOGGER.log(Level.SEVERE, "Security failed.", e);
|
|
}
|
|
|
|
/**
|
|
* Content finished locally.
|
|
*/
|
|
public void onContentFinished() {
|
|
JingleSession session = getParent();
|
|
session.onContentFinished(this);
|
|
}
|
|
|
|
/**
|
|
* Content failed locally.
|
|
* @param e exception.
|
|
*/
|
|
public void onContentFailed(Exception e) {
|
|
|
|
}
|
|
|
|
/**
|
|
* Content cancelled locally.
|
|
*/
|
|
public void onContentCancel() {
|
|
JingleSession session = getParent();
|
|
session.onContentCancel(this);
|
|
}
|
|
|
|
/**
|
|
* Handle incoming content-terminate.
|
|
* Pass it down to the description.
|
|
* @param reason reason.
|
|
*/
|
|
public void handleContentTerminate(JingleReasonElement.Reason reason) {
|
|
description.handleContentTerminate(reason);
|
|
}
|
|
|
|
/**
|
|
* Locally replace the transport method.
|
|
* @param blacklist ignore all methods on the blacklist.
|
|
* @param connection connection.
|
|
* @throws SmackException.NotConnectedException
|
|
* @throws InterruptedException
|
|
* @throws XMPPException.XMPPErrorException
|
|
* @throws SmackException.NoResponseException
|
|
*/
|
|
private void replaceTransport(Set<String> blacklist, XMPPConnection connection)
|
|
throws SmackException.NotConnectedException, InterruptedException,
|
|
XMPPException.XMPPErrorException, SmackException.NoResponseException {
|
|
if (pendingReplacingTransport != null) {
|
|
throw new AssertionError("Transport replace already pending.");
|
|
}
|
|
|
|
JingleSession session = getParent();
|
|
JingleManager jingleManager = session.getJingleManager();
|
|
|
|
JingleTransportManager rManager = jingleManager.getBestAvailableTransportManager(getParent().getPeer(), blacklist);
|
|
if (rManager == null) {
|
|
JingleElement failedTransport = JingleElement.createSessionTerminate(session.getPeer(),
|
|
session.getSessionId(), JingleReasonElement.Reason.failed_transport);
|
|
connection.createStanzaCollectorAndSend(failedTransport).nextResultOrThrow();
|
|
return;
|
|
}
|
|
|
|
pendingReplacingTransport = rManager.createTransportForInitiator(this);
|
|
|
|
JingleElement transportReplace = JingleElement.createTransportReplace(session.getInitiator(), session.getPeer(),
|
|
session.getSessionId(), getCreator(), getName(), pendingReplacingTransport.getElement());
|
|
|
|
connection.createStanzaCollectorAndSend(transportReplace).nextResultOrThrow();
|
|
}
|
|
|
|
/**
|
|
* Return a random content name.
|
|
* @return random name.
|
|
*/
|
|
private static String randomName() {
|
|
return "cont-" + StringUtils.randomString(16);
|
|
}
|
|
}
|