package eu.siacs.conversations.xmpp; import android.content.Context; import android.os.PowerManager; import android.os.PowerManager.WakeLock; import android.os.SystemClock; import android.util.Pair; import android.util.SparseArray; import org.apache.http.conn.ssl.StrictHostnameVerifier; import org.json.JSONException; import org.json.JSONObject; import org.xmlpull.v1.XmlPullParserException; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.math.BigInteger; import java.net.ConnectException; import java.net.InetAddress; import java.net.InetSocketAddress; import java.net.Socket; import java.net.UnknownHostException; import java.security.KeyManagementException; import java.security.NoSuchAlgorithmException; import java.util.ArrayList; import java.util.Arrays; import java.util.Collection; import java.util.HashMap; import java.util.Hashtable; import java.util.LinkedList; import java.util.List; import java.util.Map; import java.util.Map.Entry; import java.util.TreeSet; import javax.net.ssl.HostnameVerifier; import javax.net.ssl.SSLContext; import javax.net.ssl.SSLSocket; import javax.net.ssl.SSLSocketFactory; import javax.net.ssl.X509TrustManager; import de.thedevstack.android.logcat.Logging; import de.thedevstack.conversationsplus.dto.SrvRecord; import eu.siacs.conversations.Config; import eu.siacs.conversations.crypto.sasl.DigestMd5; import eu.siacs.conversations.crypto.sasl.Plain; import eu.siacs.conversations.crypto.sasl.SaslMechanism; import eu.siacs.conversations.crypto.sasl.ScramSha1; import eu.siacs.conversations.entities.Account; import eu.siacs.conversations.generator.IqGenerator; import eu.siacs.conversations.services.XmppConnectionService; import eu.siacs.conversations.utils.CryptoHelper; import eu.siacs.conversations.utils.DNSHelper; import eu.siacs.conversations.utils.Xmlns; import eu.siacs.conversations.xml.Element; import eu.siacs.conversations.xml.Tag; import eu.siacs.conversations.xml.TagWriter; import eu.siacs.conversations.xml.XmlReader; import eu.siacs.conversations.xmpp.jid.InvalidJidException; import eu.siacs.conversations.xmpp.jid.Jid; import eu.siacs.conversations.xmpp.jingle.OnJinglePacketReceived; import eu.siacs.conversations.xmpp.jingle.stanzas.JinglePacket; import eu.siacs.conversations.xmpp.stanzas.AbstractStanza; import eu.siacs.conversations.xmpp.stanzas.IqPacket; import eu.siacs.conversations.xmpp.stanzas.MessagePacket; import eu.siacs.conversations.xmpp.stanzas.PresencePacket; import eu.siacs.conversations.xmpp.stanzas.csi.ActivePacket; import eu.siacs.conversations.xmpp.stanzas.csi.InactivePacket; import eu.siacs.conversations.xmpp.stanzas.streammgmt.AckPacket; import eu.siacs.conversations.xmpp.stanzas.streammgmt.EnablePacket; import eu.siacs.conversations.xmpp.stanzas.streammgmt.RequestPacket; import eu.siacs.conversations.xmpp.stanzas.streammgmt.ResumePacket; public class XmppConnection implements Runnable { private static final int DEFAULT_PORT = 5222; private static final int PACKET_IQ = 0; private static final int PACKET_MESSAGE = 1; private static final int PACKET_PRESENCE = 2; protected Account account; private final WakeLock wakeLock; private Socket socket; private XmlReader tagReader; private TagWriter tagWriter; private final Features features = new Features(this); private boolean shouldBind = true; private boolean shouldAuthenticate = true; private Element streamFeatures; private final HashMap disco = new HashMap<>(); private String streamId = null; private int smVersion = 3; private final SparseArray messageReceipts = new SparseArray<>(); private int stanzasReceived = 0; private int stanzasSent = 0; private long lastPacketReceived = 0; private long lastPingSent = 0; private long lastConnect = 0; private long lastSessionStarted = 0; private int attempt = 0; private final Map> packetCallbacks = new Hashtable<>(); private OnPresencePacketReceived presenceListener = null; private OnJinglePacketReceived jingleListener = null; private OnIqPacketReceived unregisteredIqListener = null; private OnMessagePacketReceived messageListener = null; private OnStatusChanged statusListener = null; private OnBindListener bindListener = null; private final ArrayList advancedStreamFeaturesLoadedListeners = new ArrayList<>(); private OnMessageAcknowledged acknowledgedListener = null; private XmppConnectionService mXmppConnectionService = null; private SaslMechanism saslMechanism; public XmppConnection(final Account account, final XmppConnectionService service) { this.account = account; this.wakeLock = service.getPowerManager().newWakeLock( PowerManager.PARTIAL_WAKE_LOCK, account.getJid().toBareJid().toString()); tagWriter = new TagWriter(); mXmppConnectionService = service; } protected void changeStatus(final Account.State nextStatus) { if (account.getStatus() != nextStatus) { if ((nextStatus == Account.State.OFFLINE) && (account.getStatus() != Account.State.CONNECTING) && (account.getStatus() != Account.State.ONLINE) && (account.getStatus() != Account.State.DISABLED)) { return; } if (nextStatus == Account.State.ONLINE) { this.attempt = 0; } account.setStatus(nextStatus); if (statusListener != null) { statusListener.onStatusChanged(account); } } } protected void connect() { Logging.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": connecting"); features.encryptionEnabled = false; lastConnect = SystemClock.elapsedRealtime(); lastPingSent = SystemClock.elapsedRealtime(); this.attempt++; try { shouldAuthenticate = shouldBind = !account.isOptionSet(Account.OPTION_REGISTER); tagReader = new XmlReader(wakeLock); tagWriter = new TagWriter(); packetCallbacks.clear(); this.changeStatus(Account.State.CONNECTING); if (DNSHelper.isIp(account.getServer().toString())) { socket = new Socket(); try { socket.connect(new InetSocketAddress(account.getServer().toString(), DEFAULT_PORT), Config.SOCKET_TIMEOUT * 1000); } catch (IOException e) { throw new UnknownHostException(); } } else { socket = new Socket(); TreeSet result = DNSHelper.querySrvRecord(account.getServer()); if (!result.isEmpty()) { for (SrvRecord record : result) { try { socket.connect(new InetSocketAddress(record.getName(), record.getPort()), Config.SOCKET_TIMEOUT * 1000); break; } catch (IOException e) { Logging.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage()); } } } if (result.isEmpty() || !socket.isConnected()){ try { socket.connect(new InetSocketAddress(account.getServer().getDomainpart(), DEFAULT_PORT), Config.SOCKET_TIMEOUT * 1000); } catch (IOException e) { throw new UnknownHostException(); } } } final OutputStream out = socket.getOutputStream(); tagWriter.setOutputStream(out); final InputStream in = socket.getInputStream(); tagReader.setInputStream(in); tagWriter.beginDocument(); sendStartStream(); Tag nextTag; while ((nextTag = tagReader.readTag()) != null) { if (nextTag.isStart("stream")) { processStream(nextTag); break; } else { throw new IOException("unknown tag on connect"); } } if (socket.isConnected()) { socket.close(); } } catch (final IncompatibleServerException e) { this.changeStatus(Account.State.INCOMPATIBLE_SERVER); } catch (final SecurityException e) { this.changeStatus(Account.State.SECURITY_ERROR); } catch (final UnauthorizedException e) { this.changeStatus(Account.State.UNAUTHORIZED); } catch (final UnknownHostException | ConnectException e) { this.changeStatus(Account.State.SERVER_NOT_FOUND); } catch (final IOException | XmlPullParserException | NoSuchAlgorithmException e) { Logging.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": " + e.getMessage()); this.changeStatus(Account.State.OFFLINE); this.attempt--; //don't count attempt when reconnecting instantly anyway } finally { if (socket != null) { try { socket.close(); } catch (IOException e) { } } if (wakeLock.isHeld()) { try { wakeLock.release(); } catch (final RuntimeException ignored) { } } } } @Override public void run() { try { if (socket != null) { socket.close(); } } catch (final IOException ignored) { } connect(); } private void processStream(final Tag currentTag) throws XmlPullParserException, IOException, NoSuchAlgorithmException { Tag nextTag = tagReader.readTag(); while ((nextTag != null) && (!nextTag.isEnd("stream"))) { if (nextTag.isStart("error")) { processStreamError(nextTag); } else if (nextTag.isStart("features")) { processStreamFeatures(nextTag); } else if (nextTag.isStart("proceed")) { switchOverToTls(nextTag); } else if (nextTag.isStart("success")) { final String challenge = tagReader.readElement(nextTag).getContent(); try { saslMechanism.getResponse(challenge); } catch (final SaslMechanism.AuthenticationException e) { disconnect(true); Logging.e(Config.LOGTAG, String.valueOf(e)); } Logging.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": logged in"); account.setKey(Account.PINNED_MECHANISM_KEY, String.valueOf(saslMechanism.getPriority())); tagReader.reset(); sendStartStream(); processStream(tagReader.readTag()); break; } else if (nextTag.isStart("failure")) { throw new UnauthorizedException(); } else if (nextTag.isStart("challenge")) { final String challenge = tagReader.readElement(nextTag).getContent(); final Element response = new Element("response"); response.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl"); try { response.setContent(saslMechanism.getResponse(challenge)); } catch (final SaslMechanism.AuthenticationException e) { // TODO: Send auth abort tag. Logging.e(Config.LOGTAG, e.toString()); } tagWriter.writeElement(response); } else if (nextTag.isStart("enabled")) { final Element enabled = tagReader.readElement(nextTag); if ("true".equals(enabled.getAttribute("resume"))) { this.streamId = enabled.getAttribute("id"); Logging.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": stream managment(" + smVersion + ") enabled (resumable)"); } else { Logging.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": stream managment(" + smVersion + ") enabled"); } this.lastSessionStarted = SystemClock.elapsedRealtime(); this.stanzasReceived = 0; final RequestPacket r = new RequestPacket(smVersion); tagWriter.writeStanzaAsync(r); } else if (nextTag.isStart("resumed")) { lastPacketReceived = SystemClock.elapsedRealtime(); final Element resumed = tagReader.readElement(nextTag); final String h = resumed.getAttribute("h"); try { final int serverCount = Integer.parseInt(h); if (serverCount != stanzasSent) { Logging.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": session resumed with lost packages"); stanzasSent = serverCount; } else { Logging.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": session resumed"); } if (acknowledgedListener != null) { for (int i = 0; i < messageReceipts.size(); ++i) { if (serverCount >= messageReceipts.keyAt(i)) { acknowledgedListener.onMessageAcknowledged( account, messageReceipts.valueAt(i)); } } } messageReceipts.clear(); } catch (final NumberFormatException ignored) { } sendServiceDiscoveryInfo(account.getServer()); sendServiceDiscoveryInfo(account.getJid().toBareJid()); sendServiceDiscoveryItems(account.getServer()); sendInitialPing(); } else if (nextTag.isStart("r")) { tagReader.readElement(nextTag); if (Config.EXTENDED_SM_LOGGING) { Logging.d(Config.LOGTAG, account.getJid().toBareJid() + ": acknowledging stanza #" + this.stanzasReceived); } final AckPacket ack = new AckPacket(this.stanzasReceived, smVersion); tagWriter.writeStanzaAsync(ack); } else if (nextTag.isStart("a")) { final Element ack = tagReader.readElement(nextTag); lastPacketReceived = SystemClock.elapsedRealtime(); try { final int serverSequence = Integer.parseInt(ack.getAttribute("h")); if (Config.EXTENDED_SM_LOGGING) { Logging.d(Config.LOGTAG, account.getJid().toBareJid() + ": server acknowledged stanza #" + serverSequence); } final String msgId = this.messageReceipts.get(serverSequence); if (msgId != null) { if (this.acknowledgedListener != null) { this.acknowledgedListener.onMessageAcknowledged( account, msgId); } this.messageReceipts.remove(serverSequence); } } catch (NumberFormatException e) { Logging.d(Config.LOGTAG,account.getJid().toBareJid()+": server send ack without sequence number"); } } else if (nextTag.isStart("failed")) { tagReader.readElement(nextTag); Logging.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": resumption failed"); streamId = null; if (account.getStatus() != Account.State.ONLINE) { sendBindRequest(); } } else if (nextTag.isStart("iq")) { processIq(nextTag); } else if (nextTag.isStart("message")) { processMessage(nextTag); } else if (nextTag.isStart("presence")) { processPresence(nextTag); } nextTag = tagReader.readTag(); } if (account.getStatus() == Account.State.ONLINE) { account. setStatus(Account.State.OFFLINE); if (statusListener != null) { statusListener.onStatusChanged(account); } } } private void sendInitialPing() { Logging.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": sending intial ping"); final IqPacket iq = new IqPacket(IqPacket.TYPE.GET); iq.setFrom(account.getJid()); iq.addChild("ping", "urn:xmpp:ping"); this.sendIqPacket(iq, new OnIqPacketReceived() { @Override public void onIqPacketReceived(final Account account, final IqPacket packet) { Logging.d(Config.LOGTAG, account.getJid().toBareJid().toString() + ": online with resource " + account.getResource()); changeStatus(Account.State.ONLINE); } }); } private Element processPacket(final Tag currentTag, final int packetType) throws XmlPullParserException, IOException { Element element; switch (packetType) { case PACKET_IQ: element = new IqPacket(); break; case PACKET_MESSAGE: element = new MessagePacket(); break; case PACKET_PRESENCE: element = new PresencePacket(); break; default: return null; } element.setAttributes(currentTag.getAttributes()); Tag nextTag = tagReader.readTag(); if (nextTag == null) { throw new IOException("interrupted mid tag"); } while (!nextTag.isEnd(element.getName())) { if (!nextTag.isNo()) { final Element child = tagReader.readElement(nextTag); final String type = currentTag.getAttribute("type"); if (packetType == PACKET_IQ && "jingle".equals(child.getName()) && ("set".equalsIgnoreCase(type) || "get" .equalsIgnoreCase(type))) { element = new JinglePacket(); element.setAttributes(currentTag.getAttributes()); } element.addChild(child); } nextTag = tagReader.readTag(); if (nextTag == null) { throw new IOException("interrupted mid tag"); } } if (stanzasReceived == Integer.MAX_VALUE) { resetStreamId(); throw new IOException("time to restart the session. cant handle >2 billion pcks"); } ++stanzasReceived; lastPacketReceived = SystemClock.elapsedRealtime(); return element; } private void processIq(final Tag currentTag) throws XmlPullParserException, IOException { final IqPacket packet = (IqPacket) processPacket(currentTag, PACKET_IQ); if (packet.getId() == null) { return; // an iq packet without id is definitely invalid } if (packet instanceof JinglePacket) { if (this.jingleListener != null) { this.jingleListener.onJinglePacketReceived(account,(JinglePacket) packet); } } else { if (packetCallbacks.containsKey(packet.getId())) { final Pair packetCallbackDuple = packetCallbacks.get(packet.getId()); // Packets to the server should have responses from the server if (packetCallbackDuple.first.toServer(account)) { if (packet.fromServer(account)) { packetCallbackDuple.second.onIqPacketReceived(account, packet); packetCallbacks.remove(packet.getId()); } else { Logging.e(Config.LOGTAG,account.getJid().toBareJid().toString()+": ignoring spoofed iq packet"); } } else { if (packet.getFrom().equals(packetCallbackDuple.first.getTo())) { packetCallbackDuple.second.onIqPacketReceived(account, packet); packetCallbacks.remove(packet.getId()); } else { Logging.e(Config.LOGTAG,account.getJid().toBareJid().toString()+": ignoring spoofed iq packet"); } } } else if (packet.getType() == IqPacket.TYPE.GET|| packet.getType() == IqPacket.TYPE.SET) { this.unregisteredIqListener.onIqPacketReceived(account, packet); } } } private void processMessage(final Tag currentTag) throws XmlPullParserException, IOException { final MessagePacket packet = (MessagePacket) processPacket(currentTag,PACKET_MESSAGE); this.messageListener.onMessagePacketReceived(account, packet); } private void processPresence(final Tag currentTag) throws XmlPullParserException, IOException { PresencePacket packet = (PresencePacket) processPacket(currentTag, PACKET_PRESENCE); this.presenceListener.onPresencePacketReceived(account, packet); } private void sendStartTLS() throws IOException { final Tag startTLS = Tag.empty("starttls"); startTLS.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-tls"); tagWriter.writeTag(startTLS); } private void switchOverToTls(final Tag currentTag) throws XmlPullParserException, IOException { tagReader.readTag(); try { final SSLContext sc = SSLContext.getInstance("TLS"); sc.init(null,new X509TrustManager[]{this.mXmppConnectionService.getMemorizingTrustManager()},mXmppConnectionService.getRNG()); final SSLSocketFactory factory = sc.getSocketFactory(); final HostnameVerifier verifier = this.mXmppConnectionService.getMemorizingTrustManager().wrapHostnameVerifier(new StrictHostnameVerifier()); final InetAddress address = socket == null ? null : socket.getInetAddress(); if (factory == null || address == null || verifier == null) { throw new IOException("could not setup ssl"); } final SSLSocket sslSocket = (SSLSocket) factory.createSocket(socket,address.getHostAddress(), socket.getPort(),true); if (sslSocket == null) { throw new IOException("could not initialize ssl socket"); } final String[] supportProtocols; final Collection supportedProtocols = new LinkedList<>( Arrays.asList(sslSocket.getSupportedProtocols())); supportedProtocols.remove("SSLv3"); supportProtocols = supportedProtocols.toArray(new String[supportedProtocols.size()]); sslSocket.setEnabledProtocols(supportProtocols); final String[] cipherSuites = CryptoHelper.getOrderedCipherSuites( sslSocket.getSupportedCipherSuites()); //Logging.d(Config.LOGTAG, "Using ciphers: " + Arrays.toString(cipherSuites)); if (cipherSuites.length > 0) { sslSocket.setEnabledCipherSuites(cipherSuites); } if (!verifier.verify(account.getServer().getDomainpart(),sslSocket.getSession())) { Logging.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed"); throw new SecurityException(); } tagReader.setInputStream(sslSocket.getInputStream()); tagWriter.setOutputStream(sslSocket.getOutputStream()); sendStartStream(); Logging.d(Config.LOGTAG, account.getJid().toBareJid()+ ": TLS connection established"); features.encryptionEnabled = true; processStream(tagReader.readTag()); sslSocket.close(); } catch (final NoSuchAlgorithmException | KeyManagementException e1) { Logging.d(Config.LOGTAG,account.getJid().toBareJid()+": TLS certificate verification failed"); throw new SecurityException(); } } private void processStreamFeatures(final Tag currentTag) throws XmlPullParserException, IOException { this.streamFeatures = tagReader.readElement(currentTag); if (this.streamFeatures.hasChild("starttls") && !features.encryptionEnabled) { sendStartTLS(); } else if (this.streamFeatures.hasChild("register") && account.isOptionSet(Account.OPTION_REGISTER) && features.encryptionEnabled) { sendRegistryRequest(); } else if (!this.streamFeatures.hasChild("register") && account.isOptionSet(Account.OPTION_REGISTER)) { changeStatus(Account.State.REGISTRATION_NOT_SUPPORTED); disconnect(true); } else if (this.streamFeatures.hasChild("mechanisms") && shouldAuthenticate && features.encryptionEnabled) { final List mechanisms = extractMechanisms(streamFeatures .findChild("mechanisms")); final Element auth = new Element("auth"); auth.setAttribute("xmlns", "urn:ietf:params:xml:ns:xmpp-sasl"); if (mechanisms.contains("SCRAM-SHA-1")) { saslMechanism = new ScramSha1(tagWriter, account, mXmppConnectionService.getRNG()); } else if (mechanisms.contains("PLAIN")) { saslMechanism = new Plain(tagWriter, account); } else if (mechanisms.contains("DIGEST-MD5")) { saslMechanism = new DigestMd5(tagWriter, account, mXmppConnectionService.getRNG()); } if (saslMechanism != null) { final JSONObject keys = account.getKeys(); try { if (keys.has(Account.PINNED_MECHANISM_KEY) && keys.getInt(Account.PINNED_MECHANISM_KEY) > saslMechanism.getPriority()) { Logging.e(Config.LOGTAG, "Auth failed. Authentication mechanism " + saslMechanism.getMechanism() + " has lower priority (" + String.valueOf(saslMechanism.getPriority()) + ") than pinned priority (" + keys.getInt(Account.PINNED_MECHANISM_KEY) + "). Possible downgrade attack?"); throw new SecurityException(); } } catch (final JSONException e) { Logging.d(Config.LOGTAG, "Parse error while checking pinned auth mechanism"); } Logging.d(Config.LOGTAG, account.getJid().toString() + ": Authenticating with " + saslMechanism.getMechanism()); auth.setAttribute("mechanism", saslMechanism.getMechanism()); if (!saslMechanism.getClientFirstMessage().isEmpty()) { auth.setContent(saslMechanism.getClientFirstMessage()); } tagWriter.writeElement(auth); } else { throw new IncompatibleServerException(); } } else if (this.streamFeatures.hasChild("sm", "urn:xmpp:sm:" + smVersion) && streamId != null) { if (Config.EXTENDED_SM_LOGGING) { Logging.d(Config.LOGTAG,account.getJid().toBareJid()+": resuming after stanza #"+stanzasReceived); } final ResumePacket resume = new ResumePacket(this.streamId, stanzasReceived, smVersion); this.tagWriter.writeStanzaAsync(resume); } else if (this.streamFeatures.hasChild("bind") && shouldBind) { sendBindRequest(); } else { disconnect(true); changeStatus(Account.State.INCOMPATIBLE_SERVER); } } private List extractMechanisms(final Element stream) { final ArrayList mechanisms = new ArrayList<>(stream .getChildren().size()); for (final Element child : stream.getChildren()) { mechanisms.add(child.getContent()); } return mechanisms; } private void sendRegistryRequest() { final IqPacket register = new IqPacket(IqPacket.TYPE.GET); register.query("jabber:iq:register"); register.setTo(account.getServer()); sendIqPacket(register, new OnIqPacketReceived() { @Override public void onIqPacketReceived(final Account account, final IqPacket packet) { final Element instructions = packet.query().findChild("instructions"); if (packet.query().hasChild("username") && (packet.query().hasChild("password"))) { final IqPacket register = new IqPacket(IqPacket.TYPE.SET); final Element username = new Element("username").setContent(account.getUsername()); final Element password = new Element("password").setContent(account.getPassword()); register.query("jabber:iq:register").addChild(username); register.query().addChild(password); sendIqPacket(register, new OnIqPacketReceived() { @Override public void onIqPacketReceived(final Account account, final IqPacket packet) { if (packet.getType() == IqPacket.TYPE.RESULT) { account.setOption(Account.OPTION_REGISTER, false); changeStatus(Account.State.REGISTRATION_SUCCESSFUL); } else if (packet.hasChild("error") && (packet.findChild("error") .hasChild("conflict"))) { changeStatus(Account.State.REGISTRATION_CONFLICT); } else { changeStatus(Account.State.REGISTRATION_FAILED); Logging.d(Config.LOGTAG, packet.toString()); } disconnect(true); } }); } else { changeStatus(Account.State.REGISTRATION_FAILED); disconnect(true); Logging.d(Config.LOGTAG, account.getJid().toBareJid() + ": could not register. instructions are" + (instructions != null ? instructions.getContent() : "")); } } }); } private void sendBindRequest() { while(!mXmppConnectionService.areMessagesInitialized()) { try { Thread.sleep(500); } catch (final InterruptedException ignored) { } } final IqPacket iq = new IqPacket(IqPacket.TYPE.SET); iq.addChild("bind", "urn:ietf:params:xml:ns:xmpp-bind") .addChild("resource").setContent(account.getResource()); this.sendUnmodifiedIqPacket(iq, new OnIqPacketReceived() { @Override public void onIqPacketReceived(final Account account, final IqPacket packet) { final Element bind = packet.findChild("bind"); if (bind != null) { final Element jid = bind.findChild("jid"); if (jid != null && jid.getContent() != null) { try { account.setResource(Jid.fromString(jid.getContent()).getResourcepart()); } catch (final InvalidJidException e) { // TODO: Handle the case where an external JID is technically invalid? } if (streamFeatures.hasChild("session")) { sendStartSession(); } else { sendPostBindInitialization(); } } else { disconnect(true); } } else { disconnect(true); } } }); } private void sendStartSession() { final IqPacket startSession = new IqPacket(IqPacket.TYPE.SET); startSession.addChild("session","urn:ietf:params:xml:ns:xmpp-session"); this.sendUnmodifiedIqPacket(startSession, new OnIqPacketReceived() { @Override public void onIqPacketReceived(Account account, IqPacket packet) { if (packet.getType() == IqPacket.TYPE.RESULT) { sendPostBindInitialization(); } else { disconnect(true); } } }); } private void sendPostBindInitialization() { smVersion = 0; if (streamFeatures.hasChild("sm", "urn:xmpp:sm:3")) { smVersion = 3; } else if (streamFeatures.hasChild("sm", "urn:xmpp:sm:2")) { smVersion = 2; } if (smVersion != 0) { final EnablePacket enable = new EnablePacket(smVersion); tagWriter.writeStanzaAsync(enable); stanzasSent = 0; messageReceipts.clear(); } features.carbonsEnabled = false; features.blockListRequested = false; disco.clear(); sendServiceDiscoveryInfo(account.getServer()); sendServiceDiscoveryInfo(account.getJid().toBareJid()); sendServiceDiscoveryItems(account.getServer()); if (bindListener != null) { bindListener.onBind(account); } sendInitialPing(); } private void sendServiceDiscoveryInfo(final Jid jid) { if (disco.containsKey(jid)) { if (account.getServer().equals(jid)) { enableAdvancedStreamFeatures(); } } else { final IqPacket iq = new IqPacket(IqPacket.TYPE.GET); iq.setTo(jid); iq.query("http://jabber.org/protocol/disco#info"); this.sendIqPacket(iq, new OnIqPacketReceived() { @Override public void onIqPacketReceived(final Account account, final IqPacket packet) { final List elements = packet.query().getChildren(); final Info info = new Info(); for (final Element element : elements) { if (element.getName().equals("identity")) { String type = element.getAttribute("type"); String category = element.getAttribute("category"); if (type != null && category != null) { info.identities.add(new Pair<>(category,type)); } } else if (element.getName().equals("feature")) { info.features.add(element.getAttribute("var")); } } disco.put(jid, info); if (account.getServer().equals(jid)) { enableAdvancedStreamFeatures(); for (final OnAdvancedStreamFeaturesLoaded listener : advancedStreamFeaturesLoadedListeners) { listener.onAdvancedStreamFeaturesAvailable(account); } } } }); } } private void enableAdvancedStreamFeatures() { if (getFeatures().carbons() && !features.carbonsEnabled) { sendEnableCarbons(); } if (getFeatures().blocking() && !features.blockListRequested) { Logging.d(Config.LOGTAG,account.getJid().toBareJid()+": Requesting block list"); this.sendIqPacket(getIqGenerator().generateGetBlockList(), mXmppConnectionService.getIqParser()); } } private void sendServiceDiscoveryItems(final Jid server) { final IqPacket iq = new IqPacket(IqPacket.TYPE.GET); iq.setTo(server.toDomainJid()); iq.query("http://jabber.org/protocol/disco#items"); this.sendIqPacket(iq, new OnIqPacketReceived() { @Override public void onIqPacketReceived(final Account account, final IqPacket packet) { final List elements = packet.query().getChildren(); for (final Element element : elements) { if (element.getName().equals("item")) { final Jid jid = element.getAttributeAsJid("jid"); if (jid != null && !jid.equals(account.getServer())) { sendServiceDiscoveryInfo(jid); } } } } }); } private void sendEnableCarbons() { final IqPacket iq = new IqPacket(IqPacket.TYPE.SET); iq.addChild("enable", "urn:xmpp:carbons:2"); this.sendIqPacket(iq, new OnIqPacketReceived() { @Override public void onIqPacketReceived(final Account account, final IqPacket packet) { if (!packet.hasChild("error")) { Logging.d(Config.LOGTAG, account.getJid().toBareJid() + ": successfully enabled carbons"); features.carbonsEnabled = true; } else { Logging.d(Config.LOGTAG, account.getJid().toBareJid() + ": error enableing carbons " + packet.toString()); } } }); } private void processStreamError(final Tag currentTag) throws XmlPullParserException, IOException { final Element streamError = tagReader.readElement(currentTag); if (streamError != null && streamError.hasChild("conflict")) { final String resource = account.getResource().split("\\.")[0]; account.setResource(resource + "." + nextRandomId()); Logging.d(Config.LOGTAG, account.getJid().toBareJid() + ": switching resource due to conflict (" + account.getResource() + ")"); } } private void sendStartStream() throws IOException { final Tag stream = Tag.start("stream:stream"); stream.setAttribute("from", account.getJid().toBareJid().toString()); stream.setAttribute("to", account.getServer().toString()); stream.setAttribute("version", "1.0"); stream.setAttribute("xml:lang", "en"); stream.setAttribute("xmlns", "jabber:client"); stream.setAttribute("xmlns:stream", "http://etherx.jabber.org/streams"); tagWriter.writeTag(stream); } private String nextRandomId() { return new BigInteger(50, mXmppConnectionService.getRNG()).toString(32); } public void sendIqPacket(final IqPacket packet, final OnIqPacketReceived callback) { packet.setFrom(account.getJid()); this.sendUnmodifiedIqPacket(packet,callback); } private synchronized void sendUnmodifiedIqPacket(final IqPacket packet, final OnIqPacketReceived callback) { if (packet.getId() == null) { final String id = nextRandomId(); packet.setAttribute("id", id); } if (callback != null) { if (packet.getId() == null) { packet.setId(nextRandomId()); } packetCallbacks.put(packet.getId(), new Pair<>(packet, callback)); } this.sendPacket(packet); } public void sendMessagePacket(final MessagePacket packet) { this.sendPacket(packet); } public void sendPresencePacket(final PresencePacket packet) { this.sendPacket(packet); } private synchronized void sendPacket(final AbstractStanza packet) { if (stanzasSent == Integer.MAX_VALUE) { resetStreamId(); disconnect(true); return; } final String name = packet.getName(); if (name.equals("iq") || name.equals("message") || name.equals("presence")) { ++stanzasSent; } tagWriter.writeStanzaAsync(packet); if (packet instanceof MessagePacket && packet.getId() != null && getFeatures().sm()) { if (Config.EXTENDED_SM_LOGGING) { Logging.d(Config.LOGTAG, account.getJid().toBareJid() + ": requesting ack for message stanza #" + stanzasSent); } this.messageReceipts.put(stanzasSent, packet.getId()); tagWriter.writeStanzaAsync(new RequestPacket(this.smVersion)); } } public void sendPing() { if (streamFeatures.hasChild("sm")) { tagWriter.writeStanzaAsync(new RequestPacket(smVersion)); } else { final IqPacket iq = new IqPacket(IqPacket.TYPE.GET); iq.setFrom(account.getJid()); iq.addChild("ping", "urn:xmpp:ping"); this.sendIqPacket(iq, null); } this.lastPingSent = SystemClock.elapsedRealtime(); } public void setOnMessagePacketReceivedListener( final OnMessagePacketReceived listener) { this.messageListener = listener; } public void setOnUnregisteredIqPacketReceivedListener( final OnIqPacketReceived listener) { this.unregisteredIqListener = listener; } public void setOnPresencePacketReceivedListener( final OnPresencePacketReceived listener) { this.presenceListener = listener; } public void setOnJinglePacketReceivedListener( final OnJinglePacketReceived listener) { this.jingleListener = listener; } public void setOnStatusChangedListener(final OnStatusChanged listener) { this.statusListener = listener; } public void setOnBindListener(final OnBindListener listener) { this.bindListener = listener; } public void setOnMessageAcknowledgeListener(final OnMessageAcknowledged listener) { this.acknowledgedListener = listener; } public void addOnAdvancedStreamFeaturesAvailableListener(final OnAdvancedStreamFeaturesLoaded listener) { if (!this.advancedStreamFeaturesLoadedListeners.contains(listener)) { this.advancedStreamFeaturesLoadedListeners.add(listener); } } public void disconnect(final boolean force) { Logging.d(Config.LOGTAG, account.getJid().toBareJid() + ": disconnecting"); try { if (force) { socket.close(); return; } new Thread(new Runnable() { @Override public void run() { if (tagWriter.isActive()) { tagWriter.finish(); try { while (!tagWriter.finished()) { Logging.d(Config.LOGTAG, "not yet finished"); Thread.sleep(100); } tagWriter.writeTag(Tag.end("stream:stream")); socket.close(); } catch (final IOException e) { Logging.d(Config.LOGTAG, "io exception during disconnect"); } catch (final InterruptedException e) { Logging.d(Config.LOGTAG, "interrupted"); } } } }).start(); } catch (final IOException e) { Logging.d(Config.LOGTAG, "io exception during disconnect"); } } public void resetStreamId() { this.streamId = null; } public List findDiscoItemsByFeature(final String feature) { final List items = new ArrayList<>(); for (final Entry cursor : disco.entrySet()) { if (cursor.getValue().features.contains(feature)) { items.add(cursor.getKey()); } } return items; } public Jid findDiscoItemByFeature(final String feature) { final List items = findDiscoItemsByFeature(feature); if (items.size() >= 1) { return items.get(0); } return null; } public void r() { this.tagWriter.writeStanzaAsync(new RequestPacket(smVersion)); } public String getMucServer() { for (final Entry cursor : disco.entrySet()) { final Info value = cursor.getValue(); if (value.features.contains("http://jabber.org/protocol/muc") && !value.features.contains("jabber:iq:gateway") && !value.identities.contains(new Pair<>("conference","irc"))) { return cursor.getKey().toString(); } } return null; } public int getTimeToNextAttempt() { final int interval = (int) (25 * Math.pow(1.5, attempt)); final int secondsSinceLast = (int) ((SystemClock.elapsedRealtime() - this.lastConnect) / 1000); return interval - secondsSinceLast; } public int getAttempt() { return this.attempt; } public Features getFeatures() { return this.features; } public long getLastSessionEstablished() { final long diff; if (this.lastSessionStarted == 0) { diff = SystemClock.elapsedRealtime() - this.lastConnect; } else { diff = SystemClock.elapsedRealtime() - this.lastSessionStarted; } return System.currentTimeMillis() - diff; } public long getLastConnect() { return this.lastConnect; } public long getLastPingSent() { return this.lastPingSent; } public long getLastPacketReceived() { return this.lastPacketReceived; } public void sendActive() { this.sendPacket(new ActivePacket()); } public void sendInactive() { this.sendPacket(new InactivePacket()); } public void resetAttemptCount() { this.attempt = 0; this.lastConnect = 0; } private class Info { public final ArrayList features = new ArrayList<>(); public final ArrayList> identities = new ArrayList<>(); } private class UnauthorizedException extends IOException { } private class SecurityException extends IOException { } private class IncompatibleServerException extends IOException { } public class Features { XmppConnection connection; private boolean carbonsEnabled = false; private boolean encryptionEnabled = false; private boolean blockListRequested = false; public Features(final XmppConnection connection) { this.connection = connection; } private boolean hasDiscoFeature(final Jid server, final String feature) { return connection.disco.containsKey(server) && connection.disco.get(server).features.contains(feature); } public boolean carbons() { return hasDiscoFeature(account.getServer(), "urn:xmpp:carbons:2"); } public boolean blocking() { return hasDiscoFeature(account.getServer(), Xmlns.BLOCKING); } public boolean register() { return hasDiscoFeature(account.getServer(), Xmlns.REGISTER); } public boolean sm() { return streamId != null || (connection.streamFeatures != null && connection.streamFeatures.hasChild("sm")); } public boolean csi() { return connection.streamFeatures != null && connection.streamFeatures.hasChild("csi", "urn:xmpp:csi:0"); } public boolean pep() { final Pair needle = new Pair<>("pubsub","pep"); Info info = disco.get(account.getServer()); if (info != null && info.identities.contains(needle)) { return true; } else { info = disco.get(account.getJid().toBareJid()); return info != null && info.identities.contains(needle); } } public boolean mam() { if (hasDiscoFeature(account.getJid().toBareJid(), "urn:xmpp:mam:0")) { return true; } else { return hasDiscoFeature(account.getServer(), "urn:xmpp:mam:0"); } } public boolean advancedStreamFeaturesLoaded() { return disco.containsKey(account.getServer()); } public boolean rosterVersioning() { return connection.streamFeatures != null && connection.streamFeatures.hasChild("ver"); } public void setBlockListRequested(boolean value) { this.blockListRequested = value; } public boolean httpUpload() { return findDiscoItemsByFeature(Xmlns.HTTP_UPLOAD).size() > 0; } } private IqGenerator getIqGenerator() { return mXmppConnectionService.getIqGenerator(); } }