SMACK-361 Added support for Entity Capabilities.

git-svn-id: http://svn.igniterealtime.org/svn/repos/smack/trunk@13558 b35dd754-fafc-0310-a699-88a17e54d16e

build/resources/META-INF/smack-config.xml

@@ -34,4 +34,7 @@
     <!-- Default interval (seconds) in which the Ping Manager sends ping request to the server (30 minutes) -->
     <defaultPingInterval>1800</defaultPingInterval>
 
+    <!-- Automatic enable Entity Caps (XEP-0115) for new connections -->
+    <autoEnableEntityCaps>false</autoEnableEntityCaps>
+
 </smack>

build/resources/META-INF/smack.providers

@@ -678,4 +678,11 @@
         <namespace>urn:xmpp:receipts</namespace>
         <className>org.jivesoftware.smackx.receipts.DeliveryReceiptRequest$Provider</className>
     </extensionProvider>
+
+    <!-- XEP-0115 Entity Capabilities -->
+    <extensionProvider>
+        <elementName>c</elementName>
+        <namespace>http://jabber.org/protocol/caps</namespace>
+        <className>org.jivesoftware.smackx.entitycaps.provider.CapsExtensionProvider</className>
+    </extensionProvider>
 </smackProviders>

source/org/jivesoftware/smack/Connection.java

@@ -204,6 +204,11 @@ public abstract class Connection {
      */
     protected final ConnectionConfiguration config;
 
+    /**
+     * Holds the Caps Node information for the used XMPP service (i.e. the XMPP server)
+     */
+    private String serviceCapsNode;
+
     protected XMPPInputOutputStream compressionHandler;
 
     /**
@@ -795,7 +800,29 @@ public abstract class Connection {
         }
     }
 
+    /**
+     * Set the servers Entity Caps node
+     * 
+     * Connection holds this information in order to avoid a dependency to
+     * smackx where EntityCapsManager lives from smack.
+     * 
+     * @param node
+     */
+    protected void setServiceCapsNode(String node) {
+        serviceCapsNode = node;
+    }
 
+    /**
+     * Retrieve the servers Entity Caps node
+     * 
+     * Connection holds this information in order to avoid a dependency to
+     * smackx where EntityCapsManager lives from smack.
+     * 
+     * @return
+     */
+    public String getServiceCapsNode() {
+        return serviceCapsNode;
+    }
 
     /**
      * A wrapper class to associate a packet filter with a listener.

source/org/jivesoftware/smack/PacketReader.java

@@ -393,6 +393,19 @@ class PacketReader {
                     // The server requires the client to bind a resource to the stream
                     connection.getSASLAuthentication().bindingRequired();
                 }
+                // Set the entity caps node for the server if one is send
+                // See http://xmpp.org/extensions/xep-0115.html#stream
+                else if (parser.getName().equals("c")) {
+                    String node = parser.getAttributeValue(null, "node");
+                    String ver = parser.getAttributeValue(null, "ver");
+                    if (ver != null && node != null) {
+                        String capsNode = node + "#" + ver;
+                        // In order to avoid a dependency from smack to smackx
+                        // we have to set the services caps node in the connection
+                        // and not directly in the EntityCapsManager
+                        connection.setServiceCapsNode(capsNode);
+                    }
+                }
                 else if (parser.getName().equals("session")) {
                     // The server supports sessions
                     connection.getSASLAuthentication().sessionsSupported();

source/org/jivesoftware/smack/SmackConfiguration.java

@@ -63,6 +63,11 @@ public final class SmackConfiguration {
      */
     private static int defaultPingInterval = 1800; // 30 min (30*60)
 
+    /**
+     * This automatically enables EntityCaps for new connections if it is set to true
+     */
+    private static boolean autoEnableEntityCaps = false;
+
     private SmackConfiguration() {
     }
 
@@ -115,6 +120,9 @@ public final class SmackConfiguration {
                                 else if (parser.getName().equals("defaultPingInterval")) {
                                     defaultPingInterval = parseIntProperty(parser, defaultPingInterval);
                                 }
+                                else if (parser.getName().equals("autoEnableEntityCaps")) {
+                                    autoEnableEntityCaps = Boolean.parseBoolean(parser.nextText());
+                                }
                             }
                             eventType = parser.next();
                         }
@@ -329,6 +337,23 @@ public final class SmackConfiguration {
         SmackConfiguration.defaultPingInterval = defaultPingInterval;
     }
 
+    /**
+     * Check if Entity Caps are enabled as default for every new connection
+     * @return
+     */
+    public static boolean autoEnableEntityCaps() {
+        return autoEnableEntityCaps;
+    }
+
+    /**
+     * Set if Entity Caps are enabled or disabled for every new connection
+     * 
+     * @param true if Entity Caps should be auto enabled, false if not
+     */
+    public static void setAutoEnableEntityCaps(boolean b) {
+        autoEnableEntityCaps = b;
+    }
+
     private static void parseClassToLoad(XmlPullParser parser) throws Exception {
         String className = parser.nextText();
         // Attempt to load the class so that the class can get initialized

source/org/jivesoftware/smack/packet/IQ.java

@@ -43,6 +43,14 @@ public abstract class IQ extends Packet {
 
     private Type type = Type.GET;
 
+    public IQ() {
+        super();
+    }
+
+    public IQ(IQ iq) {
+        super(iq);
+        type = iq.getType();
+    }
     /**
      * Returns the type of the IQ packet.
      *

source/org/jivesoftware/smack/packet/Packet.java

@@ -90,6 +90,22 @@ public abstract class Packet {
     private final Map<String,Object> properties = new HashMap<String, Object>();
     private XMPPError error = null;
 
+    public Packet() {
+    }
+
+    public Packet(Packet p) {
+        packetID = p.getPacketID();
+        to = p.getTo();
+        from = p.getFrom();
+        xmlns = p.xmlns;
+        error = p.error;
+
+        // Copy extensions
+        for (PacketExtension pe : p.getExtensions()) {
+            addExtension(pe);
+        }
+    }
+
     /**
      * Returns the unique ID of the packet. The returned value could be <tt>null</tt> when
      * ID_NOT_AVAILABLE was set as the packet's id.
@@ -247,14 +263,25 @@ public abstract class Packet {
     }
 
     /**
-     * Adds a packet extension to the packet.
+     * Adds a packet extension to the packet. Does nothing if extension is null.
      *
      * @param extension a packet extension.
      */
     public void addExtension(PacketExtension extension) {
+        if (extension == null) return;
         packetExtensions.add(extension);
     }
 
+    /**
+     * Adds a collection of packet extensions to the packet. Does nothing if extensions is null.
+     * 
+     * @param extensions a collection of packet extensions
+     */
+    public void addExtensions(Collection<PacketExtension> extensions) {
+        if (extensions == null) return;
+        packetExtensions.addAll(extensions);
+    }
+
     /**
      * Removes a packet extension from the packet.
      *
@@ -266,7 +293,7 @@ public abstract class Packet {
 
     /**
      * Returns the packet property with the specified name or <tt>null</tt> if the
-     * property doesn't exist. Property values that were orginally primitives will
+     * property doesn't exist. Property values that were originally primitives will
      * be returned as their object equivalent. For example, an int property will be
      * returned as an Integer, a double as a Double, etc.
      *

source/org/jivesoftware/smack/util/Base32Encoder.java

@@ -0,0 +1,187 @@
+/**
+ * All rights reserved. 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 org.jivesoftware.smack.util;
+
+
+import java.io.ByteArrayOutputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+
+/**
+ * Base32 string encoding is useful for when filenames case-insensitive filesystems are encoded.
+ * Base32 representation takes roughly 20% more space then Base64.
+ * 
+ * @author Florian Schmaus
+ * Based on code by Brian Wellington (bwelling@xbill.org)
+ * @see <a href="http://en.wikipedia.org/wiki/Base32">Base32 Wikipedia entry<a>
+ *
+ */
+public class Base32Encoder implements StringEncoder {
+
+    private static Base32Encoder instance;
+    private static final String ALPHABET = "ABCDEFGHIJKLMNOPQRSTUVWXYZ2345678";
+
+    private Base32Encoder() {
+        // Use getInstance()
+    }
+
+    public static Base32Encoder getInstance() {
+        if (instance == null) {
+            instance = new Base32Encoder();
+        }
+        return instance;
+    }
+
+    @Override
+    public String decode(String str) {
+        ByteArrayOutputStream bs = new ByteArrayOutputStream();
+        byte[] raw = str.getBytes();
+        for (int i = 0; i < raw.length; i++) {
+            char c = (char) raw[i];
+            if (!Character.isWhitespace(c)) {
+                c = Character.toUpperCase(c);
+                bs.write((byte) c);
+            }
+        }
+
+        while (bs.size() % 8 != 0)
+            bs.write('8');
+
+        byte[] in = bs.toByteArray();
+
+        bs.reset();
+        DataOutputStream ds = new DataOutputStream(bs);
+
+        for (int i = 0; i < in.length / 8; i++) {
+            short[] s = new short[8];
+            int[] t = new int[5];
+
+            int padlen = 8;
+            for (int j = 0; j < 8; j++) {
+                char c = (char) in[i * 8 + j];
+                if (c == '8')
+                    break;
+                s[j] = (short) ALPHABET.indexOf(in[i * 8 + j]);
+                if (s[j] < 0)
+                    return null;
+                padlen--;
+            }
+            int blocklen = paddingToLen(padlen);
+            if (blocklen < 0)
+                return null;
+
+            // all 5 bits of 1st, high 3 (of 5) of 2nd
+            t[0] = (s[0] << 3) | s[1] >> 2;
+            // lower 2 of 2nd, all 5 of 3rd, high 1 of 4th
+            t[1] = ((s[1] & 0x03) << 6) | (s[2] << 1) | (s[3] >> 4);
+            // lower 4 of 4th, high 4 of 5th
+            t[2] = ((s[3] & 0x0F) << 4) | ((s[4] >> 1) & 0x0F);
+            // lower 1 of 5th, all 5 of 6th, high 2 of 7th
+            t[3] = (s[4] << 7) | (s[5] << 2) | (s[6] >> 3);
+            // lower 3 of 7th, all of 8th
+            t[4] = ((s[6] & 0x07) << 5) | s[7];
+
+            try {
+                for (int j = 0; j < blocklen; j++)
+                    ds.writeByte((byte) (t[j] & 0xFF));
+            } catch (IOException e) {
+            }
+        }
+
+        return new String(bs.toByteArray());
+    }
+
+    @Override
+    public String encode(String str) {
+        byte[] b = str.getBytes();
+        ByteArrayOutputStream os = new ByteArrayOutputStream();
+
+        for (int i = 0; i < (b.length + 4) / 5; i++) {
+            short s[] = new short[5];
+            int t[] = new int[8];
+
+            int blocklen = 5;
+            for (int j = 0; j < 5; j++) {
+                if ((i * 5 + j) < b.length)
+                    s[j] = (short) (b[i * 5 + j] & 0xFF);
+                else {
+                    s[j] = 0;
+                    blocklen--;
+                }
+            }
+            int padlen = lenToPadding(blocklen);
+
+            // convert the 5 byte block into 8 characters (values 0-31).
+
+            // upper 5 bits from first byte
+            t[0] = (byte) ((s[0] >> 3) & 0x1F);
+            // lower 3 bits from 1st byte, upper 2 bits from 2nd.
+            t[1] = (byte) (((s[0] & 0x07) << 2) | ((s[1] >> 6) & 0x03));
+            // bits 5-1 from 2nd.
+            t[2] = (byte) ((s[1] >> 1) & 0x1F);
+            // lower 1 bit from 2nd, upper 4 from 3rd
+            t[3] = (byte) (((s[1] & 0x01) << 4) | ((s[2] >> 4) & 0x0F));
+            // lower 4 from 3rd, upper 1 from 4th.
+            t[4] = (byte) (((s[2] & 0x0F) << 1) | ((s[3] >> 7) & 0x01));
+            // bits 6-2 from 4th
+            t[5] = (byte) ((s[3] >> 2) & 0x1F);
+            // lower 2 from 4th, upper 3 from 5th;
+            t[6] = (byte) (((s[3] & 0x03) << 3) | ((s[4] >> 5) & 0x07));
+            // lower 5 from 5th;
+            t[7] = (byte) (s[4] & 0x1F);
+
+            // write out the actual characters.
+            for (int j = 0; j < t.length - padlen; j++) {
+                char c = ALPHABET.charAt(t[j]);
+                os.write(c);
+            }
+        }
+        return new String(os.toByteArray());
+    }
+
+    private static int lenToPadding(int blocklen) {
+        switch (blocklen) {
+        case 1:
+            return 6;
+        case 2:
+            return 4;
+        case 3:
+            return 3;
+        case 4:
+            return 1;
+        case 5:
+            return 0;
+        default:
+            return -1;
+        }
+    }
+
+    private static int paddingToLen(int padlen) {
+        switch (padlen) {
+        case 6:
+            return 1;
+        case 4:
+            return 2;
+        case 3:
+            return 3;
+        case 1:
+            return 4;
+        case 0:
+            return 5;
+        default:
+            return -1;
+        }
+    }
+
+}

source/org/jivesoftware/smack/util/Base64Encoder.java

@@ -0,0 +1,44 @@
+/**
+ * All rights reserved. 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 org.jivesoftware.smack.util;
+
+
+/**
+ * @author Florian Schmaus
+ */
+public class Base64Encoder implements StringEncoder {
+
+    private static Base64Encoder instance;
+
+    private Base64Encoder() {
+        // Use getInstance()
+    }
+
+    public static Base64Encoder getInstance() {
+        if (instance == null) {
+            instance = new Base64Encoder();
+        }
+        return instance;
+    }
+
+    public String encode(String s) {
+        return Base64.encodeBytes(s.getBytes());
+    }
+
+    public String decode(String s) {
+        return new String(Base64.decode(s));
+    }
+
+}

source/org/jivesoftware/smack/util/StringEncoder.java

@@ -0,0 +1,38 @@
+/**
+ * All rights reserved. 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.
+ */
+
+/**
+ * @author Florian Schmaus
+ */
+package org.jivesoftware.smack.util;
+
+// TODO move StringEncoder, Base64Encoder and Base32Encoder to smack.util
+
+public interface StringEncoder {
+    /**
+     * Encodes an string to another representation
+     * 
+     * @param string
+     * @return
+     */
+    public String encode(String string);
+    
+    /**
+     * Decodes an string back to it's initial representation
+     * 
+     * @param string
+     * @return
+     */
+    public String decode(String string);
+}

source/org/jivesoftware/smackx/Form.java

@@ -42,6 +42,8 @@ import org.jivesoftware.smackx.packet.DataForm;
  * Depending of the form's type different operations are available. For example, it's only possible
  * to set answers if the form is of type "submit".
  * 
+ * @see <a href="http://xmpp.org/extensions/xep-0004.html">XEP-0004 Data Forms</a>
+ * 
  * @author Gaston Dombiak
  */
 public class Form {
@@ -51,6 +53,9 @@ public class Form {
     public static final String TYPE_CANCEL = "cancel";
     public static final String TYPE_RESULT = "result";
 
+    public static final String NAMESPACE = "jabber:x:data";
+    public static final String ELEMENT = "x";
+
     private DataForm dataForm;
 
     /**

source/org/jivesoftware/smackx/FormField.java

@@ -299,6 +299,26 @@ public class FormField {
         return buf.toString();
     }
 
+    public boolean equals(Object obj) {
+        if (obj == null)
+            return false;
+        if (obj == this)
+            return true;
+        if (obj.getClass() != getClass())
+            return false;
+
+        FormField other = (FormField) obj;
+
+        String thisXml = toXML();
+        String otherXml = other.toXML();
+
+        if (thisXml.equals(otherXml)) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
     /**
      * Represents the available option of a given FormField.
      *
@@ -354,5 +374,27 @@ public class FormField {
             buf.append("</option>");
             return buf.toString();
         }
+
+        public boolean equals(Object obj) {
+            if (obj == null)
+                return false;
+            if (obj == this)
+                return true;
+            if (obj.getClass() != getClass())
+                return false;
+
+            Option other = (Option) obj;
+
+            if (!value.equals(other.value))
+                return false;
+
+            String thisLabel = label == null ? "" : label;
+            String otherLabel = other.label == null ? "" : other.label;
+
+            if (!thisLabel.equals(otherLabel))
+                return false;
+
+            return true;
+        }
     }
 }

source/org/jivesoftware/smackx/NodeInformationProvider.java

@@ -20,6 +20,7 @@
 
 package org.jivesoftware.smackx;
 
+import org.jivesoftware.smack.packet.PacketExtension;
 import org.jivesoftware.smackx.packet.DiscoverInfo;
 import org.jivesoftware.smackx.packet.DiscoverItems;
 
@@ -65,4 +66,10 @@ public interface NodeInformationProvider {
      */
     public abstract List<DiscoverInfo.Identity> getNodeIdentities();
 
+    /**
+     * Returns a list of the packet extensions defined in the node.
+     *
+     * @return a list of the packet extensions defined in the node.
+     */
+    public abstract List<PacketExtension> getNodePacketExtensions();
 }

source/org/jivesoftware/smackx/ServiceDiscoveryManager.java

@@ -26,8 +26,11 @@ import org.jivesoftware.smack.filter.PacketIDFilter;
 import org.jivesoftware.smack.filter.PacketTypeFilter;
 import org.jivesoftware.smack.packet.IQ;
 import org.jivesoftware.smack.packet.Packet;
+import org.jivesoftware.smack.packet.PacketExtension;
 import org.jivesoftware.smack.packet.XMPPError;
+import org.jivesoftware.smackx.entitycaps.EntityCapsManager;
 import org.jivesoftware.smackx.packet.DiscoverInfo;
+import org.jivesoftware.smackx.packet.DiscoverInfo.Identity;
 import org.jivesoftware.smackx.packet.DiscoverItems;
 import org.jivesoftware.smackx.packet.DataForm;
 
@@ -47,8 +50,13 @@ import java.util.concurrent.ConcurrentHashMap;
  */
 public class ServiceDiscoveryManager {
 
-    private static String identityName = "Smack";
+    private static final String DEFAULT_IDENTITY_NAME = "Smack";
-    private static String identityType = "pc";
+    private static final String DEFAULT_IDENTITY_CATEGORY = "client";
+    private static final String DEFAULT_IDENTITY_TYPE = "pc";
+
+    private static List<DiscoverInfo.Identity> identities = new LinkedList<DiscoverInfo.Identity>();
+
+    private EntityCapsManager capsManager;
 
     private static Map<Connection, ServiceDiscoveryManager> instances =
             new ConcurrentHashMap<Connection, ServiceDiscoveryManager>();
@@ -66,6 +74,7 @@ public class ServiceDiscoveryManager {
                 new ServiceDiscoveryManager(connection);
             }
         });
+        identities.add(new Identity(DEFAULT_IDENTITY_CATEGORY, DEFAULT_IDENTITY_NAME, DEFAULT_IDENTITY_TYPE));
     }
 
     /**
@@ -77,6 +86,7 @@ public class ServiceDiscoveryManager {
      */
     public ServiceDiscoveryManager(Connection connection) {
         this.connection = connection;
+
         init();
     }
 
@@ -98,7 +108,12 @@ public class ServiceDiscoveryManager {
      *          in a disco request.
      */
     public static String getIdentityName() {
-        return identityName;
+        DiscoverInfo.Identity identity = identities.get(0);
+        if (identity != null) {
+            return identity.getName();
+        } else {
+            return null;
+        }
     }
 
     /**
@@ -109,7 +124,9 @@ public class ServiceDiscoveryManager {
      *          in a disco request.
      */
     public static void setIdentityName(String name) {
-        identityName = name;
+        DiscoverInfo.Identity identity = identities.remove(0);
+        identity = new DiscoverInfo.Identity(DEFAULT_IDENTITY_CATEGORY, name, DEFAULT_IDENTITY_TYPE);
+        identities.add(identity);
     }
 
     /**
@@ -121,7 +138,12 @@ public class ServiceDiscoveryManager {
      *          disco request.
      */
     public static String getIdentityType() {
-        return identityType;
+        DiscoverInfo.Identity identity = identities.get(0);
+        if (identity != null) {
+            return identity.getType();
+        } else {
+            return null;
+        }
     }
 
     /**
@@ -133,7 +155,22 @@ public class ServiceDiscoveryManager {
      *          disco request.
      */
     public static void setIdentityType(String type) {
-        identityType = type;
+        DiscoverInfo.Identity identity = identities.get(0);
+        if (identity != null) {
+            identity.setType(type);
+        } else {
+            identity = new DiscoverInfo.Identity(DEFAULT_IDENTITY_CATEGORY, DEFAULT_IDENTITY_NAME, type);
+            identities.add(identity);
+        }
+    }
+
+    /**
+     * Returns all identities of this client as unmodifiable Collection
+     * 
+     * @return
+     */
+    public static List<DiscoverInfo.Identity> getIdentities() {
+        return Collections.unmodifiableList(identities);
     }
 
     /**
@@ -190,13 +227,10 @@ public class ServiceDiscoveryManager {
                     NodeInformationProvider nodeInformationProvider =
                             getNodeInformationProvider(discoverItems.getNode());
                     if (nodeInformationProvider != null) {
-                        // Specified node was found
+                        // Specified node was found, add node items
-                        List<DiscoverItems.Item> items = nodeInformationProvider.getNodeItems();
+                        response.addItems(nodeInformationProvider.getNodeItems());
-                        if (items != null) {
+                        // Add packet extensions
-                            for (DiscoverItems.Item item : items) {
+                        response.addExtensions(nodeInformationProvider.getNodePacketExtensions());
-                                response.addItem(item);
-                            }
-                        }
                     } else if(discoverItems.getNode() != null) {
                         // Return <item-not-found/> error since client doesn't contain
                         // the specified node
@@ -223,21 +257,11 @@ public class ServiceDiscoveryManager {
                     response.setPacketID(discoverInfo.getPacketID());
                     response.setNode(discoverInfo.getNode());
                     // Add the client's identity and features only if "node" is null
+                    // and if the request was not send to a node. If Entity Caps are
+                    // enabled the client's identity and features are may also added
+                    // if the right node is chosen
                     if (discoverInfo.getNode() == null) {
-                        // Set this client identity
+                        addDiscoverInfoTo(response);
-                        DiscoverInfo.Identity identity = new DiscoverInfo.Identity("client",
-                                getIdentityName());
-                        identity.setType(getIdentityType());
-                        response.addIdentity(identity);
-                        // Add the registered features to the response
-                        synchronized (features) {
-                            for (Iterator<String> it = getFeatures(); it.hasNext();) {
-                                response.addFeature(it.next());
-                            }
-                            if (extendedInfo != null) {
-                                response.addExtension(extendedInfo);
-                            }
-                        }
                     }
                     else {
                         // Disco#info was sent to a node. Check if we have information of the
@@ -246,20 +270,11 @@ public class ServiceDiscoveryManager {
                                 getNodeInformationProvider(discoverInfo.getNode());
                         if (nodeInformationProvider != null) {
                             // Node was found. Add node features
-                            List<String> features = nodeInformationProvider.getNodeFeatures();
+                            response.addFeatures(nodeInformationProvider.getNodeFeatures());
-                            if (features != null) {
-                                for(String feature : features) {
-                                    response.addFeature(feature);
-                                }
-                            }
                             // Add node identities
-                            List<DiscoverInfo.Identity> identities =
+                            response.addIdentities(nodeInformationProvider.getNodeIdentities());
-                                    nodeInformationProvider.getNodeIdentities();
+                            // Add packet extensions
-                            if (identities != null) {
+                            response.addExtensions(nodeInformationProvider.getNodePacketExtensions());
-                                for (DiscoverInfo.Identity identity : identities) {
-                                    response.addIdentity(identity);
-                                }
-                            }
                         }
                         else {
                             // Return <item-not-found/> error since specified node was not found
@@ -274,6 +289,26 @@ public class ServiceDiscoveryManager {
         connection.addPacketListener(packetListener, packetFilter);
     }
 
+    /**
+     * Add discover info response data.
+     * 
+     * @see <a href="http://xmpp.org/extensions/xep-0030.html#info-basic">XEP-30 Basic Protocol; Example 2</a>
+     *
+     * @param response the discover info response packet
+     */
+    public void addDiscoverInfoTo(DiscoverInfo response) {
+        // First add the identities of the connection
+        response.addIdentities(identities);
+
+        // Add the registered features to the response
+        synchronized (features) {
+            for (Iterator<String> it = getFeatures(); it.hasNext();) {
+                response.addFeature(it.next());
+            }
+            response.addExtension(extendedInfo);
+        }
+    }
+
     /**
      * Returns the NodeInformationProvider responsible for providing information 
      * (ie items) related to a given node or <tt>null</null> if none.<p>
@@ -334,6 +369,17 @@ public class ServiceDiscoveryManager {
         }
     }
 
+    /**
+     * Returns the supported features by this XMPP entity.
+     * 
+     * @return a copy of the List on the supported features by this XMPP entity.
+     */
+    public List<String> getFeaturesList() {
+        synchronized (features) {
+            return new LinkedList<String>(features);
+        }
+    }
+
     /**
      * Registers that a new feature is supported by this XMPP entity. When this client is 
      * queried for its information the registered features will be answered.<p>
@@ -348,6 +394,7 @@ public class ServiceDiscoveryManager {
     public void addFeature(String feature) {
         synchronized (features) {
             features.add(feature);
+            renewEntityCapsVersion();
         }
     }
 
@@ -362,6 +409,7 @@ public class ServiceDiscoveryManager {
     public void removeFeature(String feature) {
         synchronized (features) {
             features.remove(feature);
+            renewEntityCapsVersion();
         }
     }
 
@@ -394,10 +442,36 @@ public class ServiceDiscoveryManager {
      */
     public void setExtendedInfo(DataForm info) {
       extendedInfo = info;
+      renewEntityCapsVersion();
     }
 
     /**
-     * Removes the dataform containing extended service discovery information
+     * Returns the data form that is set as extended information for this Service Discovery instance (XEP-0128)
+     * 
+     * @see <a href="http://xmpp.org/extensions/xep-0128.html">XEP-128: Service Discovery Extensions</a>
+     * @return
+     */
+    public DataForm getExtendedInfo() {
+        return extendedInfo;
+    }
+
+    /**
+     * Returns the data form as List of PacketExtensions, or null if no data form is set.
+     * This representation is needed by some classes (e.g. EntityCapsManager, NodeInformationProvider)
+     * 
+     * @return
+     */
+    public List<PacketExtension> getExtendedInfoAsList() {
+        List<PacketExtension> res = null;
+        if (extendedInfo != null) {
+            res = new ArrayList<PacketExtension>(1);
+            res.add(extendedInfo);
+        }
+        return res;
+    }
+
+    /**
+     * Removes the data form containing extended service discovery information
      * from the information returned by this XMPP entity.<p>
      *
      * Since no packet is actually sent to the server it is safe to perform this
@@ -405,17 +479,45 @@ public class ServiceDiscoveryManager {
      */
     public void removeExtendedInfo() {
        extendedInfo = null;
+       renewEntityCapsVersion();
     }
 
     /**
      * Returns the discovered information of a given XMPP entity addressed by its JID.
+     * Use null as entityID to query the server
      * 
-     * @param entityID the address of the XMPP entity.
+     * @param entityID the address of the XMPP entity or null.
      * @return the discovered information.
      * @throws XMPPException if the operation failed for some reason.
      */
     public DiscoverInfo discoverInfo(String entityID) throws XMPPException {
-        return discoverInfo(entityID, null);
+        if (entityID == null)
+            return discoverInfo(null, null);
+
+        // Check if the have it cached in the Entity Capabilities Manager
+        DiscoverInfo info = EntityCapsManager.getDiscoverInfoByUser(entityID);
+
+        if (info != null) {
+            // We were able to retrieve the information from Entity Caps and
+            // avoided a disco request, hurray!
+            return info;
+        }
+
+        // Try to get the newest node#version if it's known, otherwise null is
+        // returned
+        EntityCapsManager.NodeVerHash nvh = EntityCapsManager.getNodeVerHashByJid(entityID);
+
+        // Discover by requesting the information from the remote entity
+        // Note that wee need to use NodeVer as argument for Node if it exists
+        info = discoverInfo(entityID, nvh != null ? nvh.getNodeVer() : null);
+
+        // If the node version is known, store the new entry.
+        if (nvh != null) {
+            if (EntityCapsManager.verifyDiscvoerInfoVersion(nvh.getVer(), nvh.getHash(), info))
+                EntityCapsManager.addDiscoverInfoByNode(nvh.getNodeVer(), info);
+        }
+
+        return info;
     }
 
     /**
@@ -423,8 +525,11 @@ public class ServiceDiscoveryManager {
      * note attribute. Use this message only when trying to query information which is not 
      * directly addressable.
      * 
+     * @see <a href="http://xmpp.org/extensions/xep-0030.html#info-basic">XEP-30 Basic Protocol</a>
+     * @see <a href="http://xmpp.org/extensions/xep-0030.html#info-nodes">XEP-30 Info Nodes</a>
+     * 
      * @param entityID the address of the XMPP entity.
-     * @param node the attribute that supplements the 'jid' attribute.
+     * @param node the optional attribute that supplements the 'jid' attribute.
      * @return the discovered information.
      * @throws XMPPException if the operation failed for some reason.
      */
@@ -471,7 +576,7 @@ public class ServiceDiscoveryManager {
      * directly addressable.
      * 
      * @param entityID the address of the XMPP entity.
-     * @param node the attribute that supplements the 'jid' attribute.
+     * @param node the optional attribute that supplements the 'jid' attribute.
      * @return the discovered items.
      * @throws XMPPException if the operation failed for some reason.
      */
@@ -513,6 +618,19 @@ public class ServiceDiscoveryManager {
      */
     public boolean canPublishItems(String entityID) throws XMPPException {
         DiscoverInfo info = discoverInfo(entityID);
+        return canPublishItems(info);
+     }
+
+     /**
+      * Returns true if the server supports publishing of items. A client may wish to publish items
+      * to the server so that the server can provide items associated to the client. These items will
+      * be returned by the server whenever the server receives a disco request targeted to the bare
+      * address of the client (i.e. user@host.com).
+      * 
+      * @param DiscoverInfo the discover info packet to check.
+      * @return true if the server supports publishing of items.
+      */
+     public static boolean canPublishItems(DiscoverInfo info) {
          return info.containsFeature("http://jabber.org/protocol/disco#publish");
      }
 
@@ -565,4 +683,26 @@ public class ServiceDiscoveryManager {
             throw new XMPPException(result.getError());
         }
     }
+
+    /**
+     * Entity Capabilities
+     */
+
+    /**
+     * Loads the ServiceDiscoveryManager with an EntityCapsManger
+     * that speeds up certain lookups
+     * @param manager
+     */
+    public void setEntityCapsManager(EntityCapsManager manager) {
+        capsManager = manager;
+    }
+
+    /**
+     * Updates the Entity Capabilities Verification String
+     * if EntityCaps is enabled
+     */
+    private void renewEntityCapsVersion() {
+        if (capsManager != null && capsManager.entityCapsEnabled())
+            capsManager.updateLocalEntityCaps();
+    }
 }

source/org/jivesoftware/smackx/commands/AdHocCommandManager.java

@@ -25,6 +25,7 @@ import org.jivesoftware.smack.filter.PacketFilter;
 import org.jivesoftware.smack.filter.PacketTypeFilter;
 import org.jivesoftware.smack.packet.IQ;
 import org.jivesoftware.smack.packet.Packet;
+import org.jivesoftware.smack.packet.PacketExtension;
 import org.jivesoftware.smack.packet.XMPPError;
 import org.jivesoftware.smack.util.StringUtils;
 import org.jivesoftware.smackx.Form;
@@ -181,12 +182,16 @@ public class AdHocCommandManager {
                     public List<DiscoverInfo.Identity> getNodeIdentities() {
                         List<DiscoverInfo.Identity> answer = new ArrayList<DiscoverInfo.Identity>();
                         DiscoverInfo.Identity identity = new DiscoverInfo.Identity(
-                                "automation", name);
+                                "automation", name, "command-node");
-                        identity.setType("command-node");
                         answer.add(identity);
                         return answer;
                     }
 
+                    @Override
+                    public List<PacketExtension> getNodePacketExtensions() {
+                        return null;
+                    }
+
                 });
     }
 
@@ -319,6 +324,11 @@ public class AdHocCommandManager {
                             public List<Identity> getNodeIdentities() {
                                 return null;
                             }
+
+                            @Override
+                            public List<PacketExtension> getNodePacketExtensions() {
+                                return null;
+                            }
                         });
 
         // The packet listener and the filter for processing some AdHoc Commands

source/org/jivesoftware/smackx/entitycaps/EntityCapsManager.java

@@ -0,0 +1,713 @@
+/**
+ * Copyright 2009 Jonas Ådahl.
+ * Copyright 2011-2013 Florian Schmaus
+ *
+ * All rights reserved. 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 org.jivesoftware.smackx.entitycaps;
+
+import org.jivesoftware.smack.Connection;
+import org.jivesoftware.smack.ConnectionCreationListener;
+import org.jivesoftware.smack.ConnectionListener;
+import org.jivesoftware.smack.PacketInterceptor;
+import org.jivesoftware.smack.PacketListener;
+import org.jivesoftware.smack.SmackConfiguration;
+import org.jivesoftware.smack.XMPPConnection;
+import org.jivesoftware.smack.XMPPException;
+import org.jivesoftware.smack.packet.IQ;
+import org.jivesoftware.smack.packet.Packet;
+import org.jivesoftware.smack.packet.PacketExtension;
+import org.jivesoftware.smack.packet.Presence;
+import org.jivesoftware.smack.filter.NotFilter;
+import org.jivesoftware.smack.filter.PacketFilter;
+import org.jivesoftware.smack.filter.AndFilter;
+import org.jivesoftware.smack.filter.PacketTypeFilter;
+import org.jivesoftware.smack.filter.PacketExtensionFilter;
+import org.jivesoftware.smack.util.Base64;
+import org.jivesoftware.smack.util.Cache;
+import org.jivesoftware.smackx.Form;
+import org.jivesoftware.smackx.FormField;
+import org.jivesoftware.smackx.NodeInformationProvider;
+import org.jivesoftware.smackx.ServiceDiscoveryManager;
+import org.jivesoftware.smackx.entitycaps.cache.EntityCapsPersistentCache;
+import org.jivesoftware.smackx.entitycaps.packet.CapsExtension;
+import org.jivesoftware.smackx.packet.DiscoverInfo;
+import org.jivesoftware.smackx.packet.DataForm;
+import org.jivesoftware.smackx.packet.DiscoverInfo.Feature;
+import org.jivesoftware.smackx.packet.DiscoverInfo.Identity;
+import org.jivesoftware.smackx.packet.DiscoverItems.Item;
+
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.Iterator;
+import java.util.LinkedList;
+import java.util.List;
+import java.util.Map;
+import java.util.Queue;
+import java.util.SortedSet;
+import java.util.TreeSet;
+import java.util.WeakHashMap;
+import java.util.concurrent.ConcurrentLinkedQueue;
+import java.io.IOException;
+import java.lang.ref.WeakReference;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+/**
+ * Keeps track of entity capabilities.
+ * 
+ * @author Florian Schmaus
+ */
+public class EntityCapsManager {
+
+    public static final String NAMESPACE = "http://jabber.org/protocol/caps";
+    public static final String ELEMENT = "c";
+
+    private static final String ENTITY_NODE = "http://www.igniterealtime.org/projects/smack";
+    private static final Map<String, MessageDigest> SUPPORTED_HASHES = new HashMap<String, MessageDigest>();
+
+    protected static EntityCapsPersistentCache persistentCache;
+
+    private static Map<Connection, EntityCapsManager> instances = Collections
+            .synchronizedMap(new WeakHashMap<Connection, EntityCapsManager>());
+
+    /**
+     * Map of (node + '#" + hash algorithm) to DiscoverInfo data
+     */
+    protected static Map<String, DiscoverInfo> caps = new Cache<String, DiscoverInfo>(1000, -1);
+
+    /**
+     * Map of Full JID -&gt; DiscoverInfo/null. In case of c2s connection the
+     * key is formed as user@server/resource (resource is required) In case of
+     * link-local connection the key is formed as user@host (no resource) In
+     * case of a server or component the key is formed as domain
+     */
+    protected static Map<String, NodeVerHash> jidCaps = new Cache<String, NodeVerHash>(10000, -1);
+
+    static {
+        Connection.addConnectionCreationListener(new ConnectionCreationListener() {
+            public void connectionCreated(Connection connection) {
+                if (connection instanceof XMPPConnection)
+                    new EntityCapsManager(connection);
+            }
+        });
+
+        try {
+            MessageDigest sha1MessageDigest = MessageDigest.getInstance("SHA-1");
+            SUPPORTED_HASHES.put("sha-1", sha1MessageDigest);
+        } catch (NoSuchAlgorithmException e) {
+            // Ignore
+        }
+    }
+
+    private WeakReference<Connection> weakRefConnection;
+    private ServiceDiscoveryManager sdm;
+    private boolean entityCapsEnabled;
+    private String currentCapsVersion;
+    private boolean presenceSend = false;
+    private Queue<String> lastLocalCapsVersions = new ConcurrentLinkedQueue<String>();
+
+    /**
+     * Add DiscoverInfo to the database.
+     * 
+     * @param nodeVer
+     *            The node and verification String (e.g.
+     *            "http://psi-im.org#q07IKJEyjvHSyhy//CH0CxmKi8w=").
+     * @param info
+     *            DiscoverInfo for the specified node.
+     */
+    public static void addDiscoverInfoByNode(String nodeVer, DiscoverInfo info) {
+        caps.put(nodeVer, info);
+
+        if (persistentCache != null)
+            persistentCache.addDiscoverInfoByNodePersistent(nodeVer, info);
+    }
+
+    /**
+     * Get the Node version (node#ver) of a JID. Returns a String or null if
+     * EntiyCapsManager does not have any information.
+     * 
+     * @param user
+     *            the user (Full JID)
+     * @return the node version (node#ver) or null
+     */
+    public static String getNodeVersionByJid(String jid) {
+        NodeVerHash nvh = jidCaps.get(jid);
+        if (nvh != null) {
+            return nvh.nodeVer;
+        } else {
+            return null;
+        }
+    }
+
+    public static NodeVerHash getNodeVerHashByJid(String jid) {
+        return jidCaps.get(jid);
+    }
+
+    /**
+     * Get the discover info given a user name. The discover info is returned if
+     * the user has a node#ver associated with it and the node#ver has a
+     * discover info associated with it.
+     * 
+     * @param user
+     *            user name (Full JID)
+     * @return the discovered info
+     */
+    public static DiscoverInfo getDiscoverInfoByUser(String user) {
+        NodeVerHash nvh = jidCaps.get(user);
+        if (nvh == null)
+            return null;
+
+        return getDiscoveryInfoByNodeVer(nvh.nodeVer);
+    }
+
+    /**
+     * Retrieve DiscoverInfo for a specific node.
+     * 
+     * @param nodeVer
+     *            The node name (e.g.
+     *            "http://psi-im.org#q07IKJEyjvHSyhy//CH0CxmKi8w=").
+     * @return The corresponding DiscoverInfo or null if none is known.
+     */
+    public static DiscoverInfo getDiscoveryInfoByNodeVer(String nodeVer) {
+        DiscoverInfo info = caps.get(nodeVer);
+        if (info != null)
+            info = new DiscoverInfo(info);
+
+        return info;
+    }
+
+    /**
+     * Set the persistent cache implementation
+     * 
+     * @param cache
+     * @throws IOException
+     */
+    public static void setPersistentCache(EntityCapsPersistentCache cache) throws IOException {
+        if (persistentCache != null)
+            throw new IllegalStateException("Entity Caps Persistent Cache was already set");
+        persistentCache = cache;
+        persistentCache.replay();
+    }
+
+    /**
+     * Sets the maximum Cache size for the JID to nodeVer Cache
+     * 
+     * @param maxCacheSize
+     */
+    @SuppressWarnings("rawtypes")
+    public static void setJidCapsMaxCacheSize(int maxCacheSize) {
+        ((Cache) jidCaps).setMaxCacheSize(maxCacheSize);
+    }
+
+    /**
+     * Sets the maximum Cache size for the nodeVer to DiscoverInfo Cache
+     * 
+     * @param maxCacheSize
+     */
+    @SuppressWarnings("rawtypes")
+    public static void setCapsMaxCacheSize(int maxCacheSize) {
+        ((Cache) caps).setMaxCacheSize(maxCacheSize);
+    }
+
+    private EntityCapsManager(Connection connection) {
+        this.weakRefConnection = new WeakReference<Connection>(connection);
+        this.sdm = ServiceDiscoveryManager.getInstanceFor(connection);
+        init();
+    }
+
+    private void init() {
+        Connection connection = weakRefConnection.get();
+        instances.put(connection, this);
+
+        connection.addConnectionListener(new ConnectionListener() {
+            public void connectionClosed() {
+                // Unregister this instance since the connection has been closed
+                presenceSend = false;
+                instances.remove(weakRefConnection.get());
+            }
+
+            public void connectionClosedOnError(Exception e) {
+                presenceSend = false;
+            }
+
+            public void reconnectionFailed(Exception e) {
+                // ignore
+            }
+
+            public void reconnectingIn(int seconds) {
+                // ignore
+            }
+
+            public void reconnectionSuccessful() {
+                // ignore
+            }
+        });
+
+        // This calculates the local entity caps version
+        updateLocalEntityCaps();
+
+        if (SmackConfiguration.autoEnableEntityCaps())
+            enableEntityCaps();
+
+        PacketFilter packetFilter = new AndFilter(new PacketTypeFilter(Presence.class), new PacketExtensionFilter(
+                ELEMENT, NAMESPACE));
+        connection.addPacketListener(new PacketListener() {
+            // Listen for remote presence stanzas with the caps extension
+            // If we receive such a stanza, record the JID and nodeVer
+            @Override
+            public void processPacket(Packet packet) {
+                if (!entityCapsEnabled())
+                    return;
+
+                CapsExtension ext = (CapsExtension) packet.getExtension(EntityCapsManager.ELEMENT,
+                        EntityCapsManager.NAMESPACE);
+
+                String hash = ext.getHash().toLowerCase();
+                if (!SUPPORTED_HASHES.containsKey(hash))
+                    return;
+
+                String from = packet.getFrom();
+                String node = ext.getNode();
+                String ver = ext.getVer();
+
+                jidCaps.put(from, new NodeVerHash(node, ver, hash));
+            }
+
+        }, packetFilter);
+
+        packetFilter = new AndFilter(new PacketTypeFilter(Presence.class), new NotFilter(new PacketExtensionFilter(
+                ELEMENT, NAMESPACE)));
+        connection.addPacketListener(new PacketListener() {
+            @Override
+            public void processPacket(Packet packet) {
+                // always remove the JID from the map, even if entityCaps are
+                // disabled
+                String from = packet.getFrom();
+                jidCaps.remove(from);
+            }
+        }, packetFilter);
+
+        packetFilter = new PacketTypeFilter(Presence.class);
+        connection.addPacketSendingListener(new PacketListener() {
+            @Override
+            public void processPacket(Packet packet) {
+                presenceSend = true;
+            }
+        }, packetFilter);
+
+        // Intercept presence packages and add caps data when intended.
+        // XEP-0115 specifies that a client SHOULD include entity capabilities
+        // with every presence notification it sends.
+        PacketFilter capsPacketFilter = new PacketTypeFilter(Presence.class);
+        PacketInterceptor packetInterceptor = new PacketInterceptor() {
+            public void interceptPacket(Packet packet) {
+                if (!entityCapsEnabled)
+                    return;
+
+                CapsExtension caps = new CapsExtension(ENTITY_NODE, getCapsVersion(), "sha-1");
+                packet.addExtension(caps);
+            }
+        };
+        connection.addPacketInterceptor(packetInterceptor, capsPacketFilter);
+        // It's important to do this as last action. Since it changes the
+        // behavior of the SDM in some ways
+        sdm.setEntityCapsManager(this);
+    }
+
+    public static synchronized EntityCapsManager getInstanceFor(Connection connection) {
+        // For testing purposed forbid EntityCaps for non XMPPConnections
+        // it may work on BOSH connections too
+        if (!(connection instanceof XMPPConnection))
+            return null;
+
+        if (SUPPORTED_HASHES.size() <= 0)
+            return null;
+
+        EntityCapsManager entityCapsManager = instances.get(connection);
+
+        if (entityCapsManager == null) {
+            entityCapsManager = new EntityCapsManager(connection);
+        }
+
+        return entityCapsManager;
+    }
+
+    public void enableEntityCaps() {
+        // Add Entity Capabilities (XEP-0115) feature node.
+        sdm.addFeature(NAMESPACE);
+        updateLocalEntityCaps();
+        entityCapsEnabled = true;
+    }
+
+    public void disableEntityCaps() {
+        entityCapsEnabled = false;
+        sdm.removeFeature(NAMESPACE);
+    }
+
+    public boolean entityCapsEnabled() {
+        return entityCapsEnabled;
+    }
+
+    /**
+     * Remove a record telling what entity caps node a user has.
+     * 
+     * @param user
+     *            the user (Full JID)
+     */
+    public void removeUserCapsNode(String user) {
+        jidCaps.remove(user);
+    }
+
+    /**
+     * Get our own caps version. The version depends on the enabled features. A
+     * caps version looks like '66/0NaeaBKkwk85efJTGmU47vXI='
+     * 
+     * @return our own caps version
+     */
+    public String getCapsVersion() {
+        return currentCapsVersion;
+    }
+
+    /**
+     * Returns the local entity's NodeVer (e.g.
+     * "http://www.igniterealtime.org/projects/smack/#66/0NaeaBKkwk85efJTGmU47vXI=
+     * )
+     * 
+     * @return
+     */
+    public String getLocalNodeVer() {
+        return ENTITY_NODE + '#' + getCapsVersion();
+    }
+
+    /**
+     * Returns true if Entity Caps are supported by a given JID
+     * 
+     * @param jid
+     * @return
+     */
+    public boolean areEntityCapsSupported(String jid) {
+        if (jid == null)
+            return false;
+
+        try {
+            DiscoverInfo result = sdm.discoverInfo(jid);
+            return result.containsFeature(NAMESPACE);
+        } catch (XMPPException e) {
+            return false;
+        }
+    }
+
+    /**
+     * Returns true if Entity Caps are supported by the local service/server
+     * 
+     * @return
+     */
+    public boolean areEntityCapsSupportedByServer() {
+        return areEntityCapsSupported(weakRefConnection.get().getServiceName());
+    }
+
+    /**
+     * Updates the local user Entity Caps information with the data provided
+     * 
+     * If we are connected and there was already a presence send, another
+     * presence is send to inform others about your new Entity Caps node string.
+     * 
+     * @param discoverInfo
+     *            the local users discover info (mostly the service discovery
+     *            features)
+     * @param identityType
+     *            the local users identity type
+     * @param identityName
+     *            the local users identity name
+     * @param extendedInfo
+     *            the local users extended info
+     */
+    public void updateLocalEntityCaps() {
+        Connection connection = weakRefConnection.get();
+
+        DiscoverInfo discoverInfo = new DiscoverInfo();
+        discoverInfo.setType(IQ.Type.RESULT);
+        discoverInfo.setNode(getLocalNodeVer());
+        if (connection != null)
+            discoverInfo.setFrom(connection.getUser());
+        sdm.addDiscoverInfoTo(discoverInfo);
+
+        currentCapsVersion = generateVerificationString(discoverInfo, "sha-1");
+        addDiscoverInfoByNode(ENTITY_NODE + '#' + currentCapsVersion, discoverInfo);
+        if (lastLocalCapsVersions.size() > 10) {
+            String oldCapsVersion = lastLocalCapsVersions.poll();
+            sdm.removeNodeInformationProvider(ENTITY_NODE + '#' + oldCapsVersion);
+        }
+        lastLocalCapsVersions.add(currentCapsVersion);
+
+        caps.put(currentCapsVersion, discoverInfo);
+        if (connection != null)
+            jidCaps.put(connection.getUser(), new NodeVerHash(ENTITY_NODE, currentCapsVersion, "sha-1"));
+
+        sdm.setNodeInformationProvider(ENTITY_NODE + '#' + currentCapsVersion, new NodeInformationProvider() {
+            List<String> features = sdm.getFeaturesList();
+            List<Identity> identities = new LinkedList<Identity>(ServiceDiscoveryManager.getIdentities());
+            List<PacketExtension> packetExtensions = sdm.getExtendedInfoAsList();
+
+            @Override
+            public List<Item> getNodeItems() {
+                return null;
+            }
+
+            @Override
+            public List<String> getNodeFeatures() {
+                return features;
+            }
+
+            @Override
+            public List<Identity> getNodeIdentities() {
+                return identities;
+            }
+
+            @Override
+            public List<PacketExtension> getNodePacketExtensions() {
+                return packetExtensions;
+            }
+        });
+
+        // Send an empty presence, and let the packet intercepter
+        // add a <c/> node to it.
+        // See http://xmpp.org/extensions/xep-0115.html#advertise
+        // We only send a presence packet if there was already one send
+        // to respect ConnectionConfiguration.isSendPresence()
+        if (connection != null && connection.isAuthenticated() && presenceSend) {
+            Presence presence = new Presence(Presence.Type.available);
+            connection.sendPacket(presence);
+        }
+    }
+
+    /**
+     * Verify DisoverInfo and Caps Node as defined in XEP-0115 5.4 Processing
+     * Method
+     * 
+     * @see <a href="http://xmpp.org/extensions/xep-0115.html#ver-proc">XEP-0115
+     *      5.4 Processing Method</a>
+     * 
+     * @param capsNode
+     *            the caps node (i.e. node#ver)
+     * @param info
+     * @return true if it's valid and should be cache, false if not
+     */
+    public static boolean verifyDiscvoerInfoVersion(String ver, String hash, DiscoverInfo info) {
+        // step 3.3 check for duplicate identities
+        if (info.containsDuplicateIdentities())
+            return false;
+
+        // step 3.4 check for duplicate features
+        if (info.containsDuplicateFeatures())
+            return false;
+
+        // step 3.5 check for well-formed packet extensions
+        if (verifyPacketExtensions(info))
+            return false;
+
+        String calculatedVer = generateVerificationString(info, hash);
+
+        if (!ver.equals(calculatedVer))
+            return false;
+
+        return true;
+    }
+
+    /**
+     * 
+     * @param info
+     * @return true if the packet extensions is ill-formed
+     */
+    protected static boolean verifyPacketExtensions(DiscoverInfo info) {
+        List<FormField> foundFormTypes = new LinkedList<FormField>();
+        for (Iterator<PacketExtension> i = info.getExtensions().iterator(); i.hasNext();) {
+            PacketExtension pe = i.next();
+            if (pe.getNamespace().equals(Form.NAMESPACE)) {
+                DataForm df = (DataForm) pe;
+                for (Iterator<FormField> it = df.getFields(); it.hasNext();) {
+                    FormField f = it.next();
+                    if (f.getVariable().equals("FORM_TYPE")) {
+                        for (FormField fft : foundFormTypes) {
+                            if (f.equals(fft))
+                                return true;
+                        }
+                        foundFormTypes.add(f);
+                    }
+                }
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Generates a XEP-115 Verification String
+     * 
+     * @see <a href="http://xmpp.org/extensions/xep-0115.html#ver">XEP-115
+     *      Verification String</a>
+     * 
+     * @param discoverInfo
+     * @param hash
+     *            the used hash function
+     * @return The generated verification String or null if the hash is not
+     *         supported
+     */
+    protected static String generateVerificationString(DiscoverInfo discoverInfo, String hash) {
+        MessageDigest md = SUPPORTED_HASHES.get(hash.toLowerCase());
+        if (md == null)
+            return null;
+
+        DataForm extendedInfo = (DataForm) discoverInfo.getExtension(Form.ELEMENT, Form.NAMESPACE);
+
+        // 1. Initialize an empty string S ('sb' in this method).
+        StringBuilder sb = new StringBuilder(); // Use StringBuilder as we don't
+                                                // need thread-safe StringBuffer
+
+        // 2. Sort the service discovery identities by category and then by
+        // type and then by xml:lang
+        // (if it exists), formatted as CATEGORY '/' [TYPE] '/' [LANG] '/'
+        // [NAME]. Note that each slash is included even if the LANG or
+        // NAME is not included (in accordance with XEP-0030, the category and
+        // type MUST be included.
+        SortedSet<DiscoverInfo.Identity> sortedIdentities = new TreeSet<DiscoverInfo.Identity>();
+        ;
+        for (Iterator<DiscoverInfo.Identity> it = discoverInfo.getIdentities(); it.hasNext();)
+            sortedIdentities.add(it.next());
+
+        // 3. For each identity, append the 'category/type/lang/name' to S,
+        // followed by the '<' character.
+        for (Iterator<DiscoverInfo.Identity> it = sortedIdentities.iterator(); it.hasNext();) {
+            DiscoverInfo.Identity identity = it.next();
+            sb.append(identity.getCategory());
+            sb.append("/");
+            sb.append(identity.getType());
+            sb.append("/");
+            sb.append(identity.getLanguage() == null ? "" : identity.getLanguage());
+            sb.append("/");
+            sb.append(identity.getName() == null ? "" : identity.getName());
+            sb.append("<");
+        }
+
+        // 4. Sort the supported service discovery features.
+        SortedSet<String> features = new TreeSet<String>();
+        for (Iterator<Feature> it = discoverInfo.getFeatures(); it.hasNext();)
+            features.add(it.next().getVar());
+
+        // 5. For each feature, append the feature to S, followed by the '<'
+        // character
+        for (String f : features) {
+            sb.append(f);
+            sb.append("<");
+        }
+
+        // only use the data form for calculation is it has a hidden FORM_TYPE
+        // field
+        // see XEP-0115 5.4 step 3.6
+        if (extendedInfo != null && extendedInfo.hasHiddenFromTypeField()) {
+            synchronized (extendedInfo) {
+                // 6. If the service discovery information response includes
+                // XEP-0128 data forms, sort the forms by the FORM_TYPE (i.e.,
+                // by the XML character data of the <value/> element).
+                SortedSet<FormField> fs = new TreeSet<FormField>(new Comparator<FormField>() {
+                    public int compare(FormField f1, FormField f2) {
+                        return f1.getVariable().compareTo(f2.getVariable());
+                    }
+                });
+
+                FormField ft = null;
+
+                for (Iterator<FormField> i = extendedInfo.getFields(); i.hasNext();) {
+                    FormField f = i.next();
+                    if (!f.getVariable().equals("FORM_TYPE")) {
+                        fs.add(f);
+                    } else {
+                        ft = f;
+                    }
+                }
+
+                // Add FORM_TYPE values
+                if (ft != null) {
+                    formFieldValuesToCaps(ft.getValues(), sb);
+                }
+
+                // 7. 3. For each field other than FORM_TYPE:
+                // 1. Append the value of the "var" attribute, followed by the
+                // '<' character.
+                // 2. Sort values by the XML character data of the <value/>
+                // element.
+                // 3. For each <value/> element, append the XML character data,
+                // followed by the '<' character.
+                for (FormField f : fs) {
+                    sb.append(f.getVariable());
+                    sb.append("<");
+                    formFieldValuesToCaps(f.getValues(), sb);
+                }
+            }
+        }
+        // 8. Ensure that S is encoded according to the UTF-8 encoding (RFC
+        // 3269).
+        // 9. Compute the verification string by hashing S using the algorithm
+        // specified in the 'hash' attribute (e.g., SHA-1 as defined in RFC
+        // 3174).
+        // The hashed data MUST be generated with binary output and
+        // encoded using Base64 as specified in Section 4 of RFC 4648
+        // (note: the Base64 output MUST NOT include whitespace and MUST set
+        // padding bits to zero).
+        byte[] digest = md.digest(sb.toString().getBytes());
+        return Base64.encodeBytes(digest);
+    }
+
+    private static void formFieldValuesToCaps(Iterator<String> i, StringBuilder sb) {
+        SortedSet<String> fvs = new TreeSet<String>();
+        while (i.hasNext()) {
+            fvs.add(i.next());
+        }
+        for (String fv : fvs) {
+            sb.append(fv);
+            sb.append("<");
+        }
+    }
+
+    public static class NodeVerHash {
+        private String node;
+        private String hash;
+        private String ver;
+        private String nodeVer;
+
+        NodeVerHash(String node, String ver, String hash) {
+            this.node = node;
+            this.ver = ver;
+            this.hash = hash;
+            nodeVer = node + "#" + ver;
+        }
+
+        public String getNodeVer() {
+            return nodeVer;
+        }
+
+        public String getNode() {
+            return node;
+        }
+
+        public String getHash() {
+            return hash;
+        }
+
+        public String getVer() {
+            return ver;
+        }
+    }
+}

source/org/jivesoftware/smackx/entitycaps/cache/EntityCapsPersistentCache.java

@@ -0,0 +1,38 @@
+/**
+ * All rights reserved. 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 org.jivesoftware.smackx.entitycaps.cache;
+
+import java.io.IOException;
+
+import org.jivesoftware.smackx.packet.DiscoverInfo;
+
+public interface EntityCapsPersistentCache {
+    /**
+     * Add an DiscoverInfo to the persistent Cache
+     * 
+     * @param node
+     * @param info
+     */
+    abstract void addDiscoverInfoByNodePersistent(String node, DiscoverInfo info);
+
+    /**
+     * Replay the Caches data into EntityCapsManager
+     */
+    abstract void replay() throws IOException;
+
+    /**
+     * Empty the Cache
+     */
+    abstract void emptyCache();
+}

source/org/jivesoftware/smackx/entitycaps/cache/SimpleDirectoryPersistentCache.java

@@ -0,0 +1,193 @@
+/**
+ *  Copyright 2011 Florian Schmaus
+ *
+ *  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 org.jivesoftware.smackx.entitycaps.cache;
+
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.Reader;
+import java.io.StringReader;
+
+import org.jivesoftware.smack.packet.IQ;
+import org.jivesoftware.smack.provider.IQProvider;
+import org.jivesoftware.smack.util.Base64Encoder;
+import org.jivesoftware.smack.util.StringEncoder;
+import org.jivesoftware.smackx.entitycaps.EntityCapsManager;
+import org.jivesoftware.smackx.packet.DiscoverInfo;
+import org.jivesoftware.smackx.provider.DiscoverInfoProvider;
+import org.xmlpull.mxp1.MXParser;
+import org.xmlpull.v1.XmlPullParser;
+import org.xmlpull.v1.XmlPullParserException;
+
+/**
+ * Simple implementation of an EntityCapsPersistentCache that uses a directory
+ * to store the Caps information for every known node. Every node is represented
+ * by an file.
+ * 
+ * @author Florian Schmaus
+ * 
+ */
+public class SimpleDirectoryPersistentCache implements EntityCapsPersistentCache {
+
+    private File cacheDir;
+    private StringEncoder stringEncoder;
+
+    /**
+     * Creates a new SimpleDirectoryPersistentCache Object. Make sure that the
+     * cacheDir exists and that it's an directory.
+     * 
+     * If your cacheDir is case insensitive then make sure to set the
+     * StringEncoder to Base32.
+     * 
+     * @param cacheDir
+     */
+    public SimpleDirectoryPersistentCache(File cacheDir) {
+        this(cacheDir, Base64Encoder.getInstance());
+    }
+
+    /**
+     * Creates a new SimpleDirectoryPersistentCache Object. Make sure that the
+     * cacheDir exists and that it's an directory.
+     * 
+     * If your cacheDir is case insensitive then make sure to set the
+     * StringEncoder to Base32.
+     * 
+     * @param cacheDir
+     * @param stringEncoder
+     */
+    public SimpleDirectoryPersistentCache(File cacheDir, StringEncoder stringEncoder) {
+        if (!cacheDir.exists())
+            throw new IllegalStateException("Cache directory \"" + cacheDir + "\" does not exist");
+        if (!cacheDir.isDirectory())
+            throw new IllegalStateException("Cache directory \"" + cacheDir + "\" is not a directory");
+
+        this.cacheDir = cacheDir;
+        this.stringEncoder = stringEncoder;
+    }
+
+    @Override
+    public void addDiscoverInfoByNodePersistent(String node, DiscoverInfo info) {
+        String filename = stringEncoder.encode(node);
+        File nodeFile = new File(cacheDir, filename);
+
+        try {
+            if (nodeFile.createNewFile())
+                writeInfoToFile(nodeFile, info);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Override
+    public void replay() throws IOException {
+        File[] files = cacheDir.listFiles();
+        for (File f : files) {
+            String node = stringEncoder.decode(f.getName());
+            DiscoverInfo info = restoreInfoFromFile(f);
+            if (info == null)
+                continue;
+
+            EntityCapsManager.addDiscoverInfoByNode(node, info);
+        }
+    }
+
+    public void emptyCache() {
+        File[] files = cacheDir.listFiles();
+        for (File f : files) {
+            f.delete();
+        }
+    }
+
+    /**
+     * Writes the DiscoverInfo packet to an file
+     * 
+     * @param file
+     * @param info
+     * @throws IOException
+     */
+    private static void writeInfoToFile(File file, DiscoverInfo info) throws IOException {
+        DataOutputStream dos = new DataOutputStream(new FileOutputStream(file));
+        try {
+            dos.writeUTF(info.toXML());
+        } finally {
+            dos.close();
+        }
+    }
+
+    /**
+     * Tries to restore an DiscoverInfo packet from a file.
+     * 
+     * @param file
+     * @return
+     * @throws IOException
+     */
+    private static DiscoverInfo restoreInfoFromFile(File file) throws IOException {
+        DataInputStream dis = new DataInputStream(new FileInputStream(file));
+        String fileContent = null;
+        String id;
+        String from;
+        String to;
+
+        try {
+            fileContent = dis.readUTF();
+        } finally {
+            dis.close();
+        }
+        if (fileContent == null)
+            return null;
+
+        Reader reader = new StringReader(fileContent);
+        XmlPullParser parser;
+        try {
+            parser = new MXParser();
+            parser.setFeature(XmlPullParser.FEATURE_PROCESS_NAMESPACES, true);
+            parser.setInput(reader);
+        } catch (XmlPullParserException xppe) {
+            xppe.printStackTrace();
+            return null;
+        }
+
+        DiscoverInfo iqPacket;
+        IQProvider provider = new DiscoverInfoProvider();
+
+        // Parse the IQ, we only need the id
+        try {
+            parser.next();
+            id = parser.getAttributeValue("", "id");
+            from = parser.getAttributeValue("", "from");
+            to = parser.getAttributeValue("", "to");
+            parser.next();
+        } catch (XmlPullParserException e1) {
+            return null;
+        }
+
+        try {
+            iqPacket = (DiscoverInfo) provider.parseIQ(parser);
+        } catch (Exception e) {
+            return null;
+        }
+
+        iqPacket.setPacketID(id);
+        iqPacket.setFrom(from);
+        iqPacket.setTo(to);
+        iqPacket.setType(IQ.Type.RESULT);
+        return iqPacket;
+    }
+}

source/org/jivesoftware/smackx/entitycaps/packet/CapsExtension.java

@@ -0,0 +1,83 @@
+/**
+ * Copyright 2009 Jonas Ådahl.
+ * Copyright 2011-2013 Florian Schmaus
+ *
+ * All rights reserved. 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 org.jivesoftware.smackx.entitycaps.packet;
+
+import org.jivesoftware.smack.packet.PacketExtension;
+import org.jivesoftware.smackx.entitycaps.EntityCapsManager;
+
+public class CapsExtension implements PacketExtension {
+
+    private String node, ver, hash;
+
+    public CapsExtension() {
+    }
+
+    public CapsExtension(String node, String version, String hash) {
+        this.node = node;
+        this.ver = version;
+        this.hash = hash;
+    }
+
+    public String getElementName() {
+        return EntityCapsManager.ELEMENT;
+    }
+
+    public String getNamespace() {
+        return EntityCapsManager.NAMESPACE;
+    }
+
+    public String getNode() {
+        return node;
+    }
+
+    public void setNode(String node) {
+        this.node = node;
+    }
+
+    public String getVer() {
+        return ver;
+    }
+
+    public void setVer(String ver) {
+        this.ver = ver;
+    }
+
+    public String getHash() {
+        return hash;
+    }
+
+    public void setHash(String hash) {
+        this.hash = hash;
+    }
+
+    /*
+     *  <c xmlns='http://jabber.org/protocol/caps'
+     *  hash='sha-1'
+     *  node='http://code.google.com/p/exodus'
+     *  ver='QgayPKawpkPSDYmwT/WM94uAlu0='/>
+     *
+     */
+    public String toXML() {
+        String xml = "<" + EntityCapsManager.ELEMENT + " xmlns=\"" + EntityCapsManager.NAMESPACE + "\" " +
+            "hash=\"" + hash + "\" " +
+            "node=\"" + node + "\" " +
+            "ver=\"" + ver + "\"/>";
+
+        return xml;
+    }
+}

source/org/jivesoftware/smackx/entitycaps/provider/CapsExtensionProvider.java

@@ -0,0 +1,60 @@
+/*
+ * Copyright 2009 Jonas Ådahl.
+ * Copyright 2011-2013 Florian Schmaus
+ *
+ * All rights reserved. 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 org.jivesoftware.smackx.entitycaps.provider;
+
+import java.io.IOException;
+
+import org.jivesoftware.smack.XMPPException;
+import org.jivesoftware.smack.packet.PacketExtension;
+import org.jivesoftware.smack.provider.PacketExtensionProvider;
+import org.jivesoftware.smackx.entitycaps.EntityCapsManager;
+import org.jivesoftware.smackx.entitycaps.packet.CapsExtension;
+
+import org.xmlpull.v1.XmlPullParser;
+import org.xmlpull.v1.XmlPullParserException;
+
+public class CapsExtensionProvider implements PacketExtensionProvider {
+
+    public PacketExtension parseExtension(XmlPullParser parser) throws XmlPullParserException, IOException,
+            XMPPException {
+        String hash = null;
+        String version = null;
+        String node = null;
+        if (parser.getEventType() == XmlPullParser.START_TAG
+                && parser.getName().equalsIgnoreCase(EntityCapsManager.ELEMENT)) {
+            hash = parser.getAttributeValue(null, "hash");
+            version = parser.getAttributeValue(null, "ver");
+            node = parser.getAttributeValue(null, "node");
+        } else {
+            throw new XMPPException("Malformed Caps element");
+        }
+
+        parser.next();
+
+        if (!(parser.getEventType() == XmlPullParser.END_TAG
+                && parser.getName().equalsIgnoreCase(EntityCapsManager.ELEMENT))) {
+            throw new XMPPException("Malformed nested Caps element");
+        }
+
+        if (hash != null && version != null && node != null) {
+            return new CapsExtension(node, version, hash);
+        } else {
+            throw new XMPPException("Caps elment with missing attributes");
+        }
+    }
+}

source/org/jivesoftware/smackx/muc/MultiUserChat.java

@@ -52,6 +52,7 @@ import org.jivesoftware.smack.filter.PacketTypeFilter;
 import org.jivesoftware.smack.packet.IQ;
 import org.jivesoftware.smack.packet.Message;
 import org.jivesoftware.smack.packet.Packet;
+import org.jivesoftware.smack.packet.PacketExtension;
 import org.jivesoftware.smack.packet.Presence;
 import org.jivesoftware.smack.packet.Registration;
 import org.jivesoftware.smackx.Form;
@@ -133,6 +134,11 @@ public class MultiUserChat {
                         public List<DiscoverInfo.Identity> getNodeIdentities() {
                             return null;
                         }
+
+                        @Override
+                        public List<PacketExtension> getNodePacketExtensions() {
+                            return null;
+                        }
                     });
             }
         });

source/org/jivesoftware/smackx/packet/DataForm.java

@@ -21,6 +21,7 @@
 package org.jivesoftware.smackx.packet;
 
 import org.jivesoftware.smack.packet.PacketExtension;
+import org.jivesoftware.smackx.Form;
 import org.jivesoftware.smackx.FormField;
 
 import java.util.ArrayList;
@@ -123,11 +124,11 @@ public class DataForm implements PacketExtension {
     }
 
     public String getElementName() {
-        return "x";
+        return Form.ELEMENT;
     }
 
     public String getNamespace() {
-        return "jabber:x:data";
+        return Form.NAMESPACE;
     }
 
     /**
@@ -195,6 +196,21 @@ public class DataForm implements PacketExtension {
         }
     }
 
+    /**
+     * Returns true if this DataForm has at least one FORM_TYPE field which is
+     * hidden. This method is used for sanity checks.
+     *
+     * @return
+     */
+    public boolean hasHiddenFromTypeField() {
+        boolean found = false;
+        for (FormField f : fields) {
+            if (f.getVariable().equals("FORM_TYPE") && f.getType() != null && f.getType().equals("hidden"))
+                found = true;
+        }
+        return found;
+    }
+
     public String toXML() {
         StringBuilder buf = new StringBuilder();
         buf.append("<").append(getElementName()).append(" xmlns=\"").append(getNamespace()).append(

source/org/jivesoftware/smackx/packet/DiscoverInfo.java

@@ -23,8 +23,10 @@ package org.jivesoftware.smackx.packet;
 import org.jivesoftware.smack.packet.IQ;
 import org.jivesoftware.smack.util.StringUtils;
 
+import java.util.Collection;
 import java.util.Collections;
 import java.util.Iterator;
+import java.util.LinkedList;
 import java.util.List;
 import java.util.concurrent.CopyOnWriteArrayList;
 
@@ -45,6 +47,36 @@ public class DiscoverInfo extends IQ {
     private final List<Identity> identities = new CopyOnWriteArrayList<Identity>();
     private String node;
 
+    public DiscoverInfo() {
+        super();
+    }
+
+    /**
+     * Copy constructor
+     * 
+     * @param d
+     */
+    public DiscoverInfo(DiscoverInfo d) {
+        super(d);
+
+        // Set node
+        setNode(d.getNode());
+
+        // Copy features
+        synchronized (d.features) {
+            for (Feature f : d.features) {
+                addFeature(f);
+            }
+        }
+
+        // Copy identities
+        synchronized (d.identities) {
+            for (Identity i : d.identities) {
+                addIdentity(i);
+            }
+        }
+    }
+
     /**
      * Adds a new feature to the discovered information.
      *
@@ -54,6 +86,18 @@ public class DiscoverInfo extends IQ {
         addFeature(new Feature(feature));
     }
 
+    /**
+     * Adds a collection of features to the packet. Does noting if featuresToAdd is null.
+     *
+     * @param featuresToAdd
+     */
+    public void addFeatures(Collection<String> featuresToAdd) {
+        if (featuresToAdd == null) return;
+        for (String feature : featuresToAdd) {
+            addFeature(feature);
+        }
+    }
+
     private void addFeature(Feature feature) {
         synchronized (features) {
             features.add(feature);
@@ -82,6 +126,18 @@ public class DiscoverInfo extends IQ {
         }
     }
 
+    /**
+     * Adds identities to the DiscoverInfo stanza
+     * 
+     * @param identitiesToAdd
+     */
+    public void addIdentities(Collection<Identity> identitiesToAdd) {
+        if (identitiesToAdd == null) return;
+        synchronized (identities) {
+            identities.addAll(identitiesToAdd);
+        }
+    }
+
     /**
      * Returns the discovered identities of an XMPP entity.
      * 
@@ -158,6 +214,40 @@ public class DiscoverInfo extends IQ {
         return buf.toString();
     }
 
+    /**
+     * Test if a DiscoverInfo response contains duplicate identities.
+     * 
+     * @return true if duplicate identities where found, otherwise false
+     */
+    public boolean containsDuplicateIdentities() {
+        List<Identity> checkedIdentities = new LinkedList<Identity>();
+        for (Identity i : identities) {
+            for (Identity i2 : checkedIdentities) {
+                if (i.equals(i2))
+                    return true;
+            }
+            checkedIdentities.add(i);
+        }
+        return false;
+    }
+
+    /**
+     * Test if a DiscoverInfo response contains duplicate features.
+     * 
+     * @return true if duplicate identities where found, otherwise false
+     */
+    public boolean containsDuplicateFeatures() {
+        List<Feature> checkedFeatures = new LinkedList<Feature>();
+        for (Feature f : features) {
+            for (Feature f2 : checkedFeatures) {
+                if (f.equals(f2))
+                    return true;
+            }
+            checkedFeatures.add(f);
+        }
+        return false;
+    }
+
     /**
      * Represents the identity of a given XMPP entity. An entity may have many identities but all
      * the identities SHOULD have the same name.<p>
@@ -167,21 +257,26 @@ public class DiscoverInfo extends IQ {
      * attributes.
      * 
      */
-    public static class Identity {
+    public static class Identity implements Comparable<Object> {
 
         private String category;
         private String name;
         private String type;
+        private String lang; // 'xml:lang;
 
         /**
          * Creates a new identity for an XMPP entity.
+         * 'category' and 'type' are required by 
+         * <a href="http://xmpp.org/extensions/xep-0030.html#schemas">XEP-30 XML Schemas</a>
          * 
-         * @param category the entity's category.
+         * @param category the entity's category (required as per XEP-30).
          * @param name the entity's name.
+         * @param type the entity's type (required as per XEP-30).
          */
-        public Identity(String category, String name) {
+        public Identity(String category, String name, String type) {
             this.category = category;
             this.name = name;
+            this.type = type;
         }
 
         /**
@@ -223,16 +318,106 @@ public class DiscoverInfo extends IQ {
             this.type = type;
         }
 
+        /**
+         * Sets the natural language (xml:lang) for this identity (optional)
+         * 
+         * @param lang the xml:lang of this Identity
+         */
+        public void setLanguage(String lang) {
+            this.lang = lang;
+        }
+
+        /**
+         * Returns the identities natural language if one is set
+         * 
+         * @return the value of xml:lang of this Identity
+         */
+        public String getLanguage() {
+            return lang;
+        }
+
         public String toXML() {
             StringBuilder buf = new StringBuilder();
-            buf.append("<identity category=\"").append(StringUtils.escapeForXML(category)).append("\"");
+            buf.append("<identity");
+            // Check if this packet has 'lang' set and maybe append it to the resulting string
+            if (lang != null)
+                buf.append(" xml:lang=\"").append(StringUtils.escapeForXML(lang)).append("\"");
+            // Category must always be set
+            buf.append(" category=\"").append(StringUtils.escapeForXML(category)).append("\"");
+            // Name must always be set
             buf.append(" name=\"").append(StringUtils.escapeForXML(name)).append("\"");
+            // Check if this packet has 'type' set and maybe append it to the resulting string
             if (type != null) {
                 buf.append(" type=\"").append(StringUtils.escapeForXML(type)).append("\"");
             }
             buf.append("/>");
             return buf.toString();
         }
+
+        /** 
+         * Check equality for Identity  for category, type, lang and name
+         * in that order as defined by
+         * <a href="http://xmpp.org/extensions/xep-0115.html#ver-proc">XEP-0015 5.4 Processing Method (Step 3.3)</a>
+         *  
+         */
+        public boolean equals(Object obj) {
+            if (obj == null)
+                return false;
+            if (obj == this)
+                return true;
+            if (obj.getClass() != getClass())
+                return false;
+
+            DiscoverInfo.Identity other = (DiscoverInfo.Identity) obj;
+            if (!this.category.equals(other.category))
+                return false;
+
+            String otherLang = other.lang == null ? "" : other.lang;
+            String thisLang = lang == null ? "" : lang;
+
+            if (!other.type.equals(type))
+                return false;
+            if (!otherLang.equals(thisLang))
+                return false;
+
+            String otherName = other.name == null ? "" : other.name;
+            String thisName = name == null ? "" : other.name;
+            if (!thisName.equals(otherName))
+                return false;
+
+            return true;
+        }
+
+        /**
+         * Compares and identity with another object. The comparison order is:
+         * Category, Type, Lang. If all three are identical the other Identity is considered equal.
+         * Name is not used for comparision, as defined by XEP-0115
+         * 
+         * @param obj
+         * @return
+         */
+        public int compareTo(Object obj) {
+
+            DiscoverInfo.Identity other = (DiscoverInfo.Identity) obj;
+            String otherLang = other.lang == null ? "" : other.lang;
+            String thisLang = lang == null ? "" : lang;
+
+            if (category.equals(other.category)) {
+                if (type.equals(other.type)) {
+                    if (thisLang.equals(otherLang)) {
+                        // Don't compare on name, XEP-30 says that name SHOULD
+                        // be equals for all identities of an entity
+                        return 0;
+                    } else {
+                        return thisLang.compareTo(otherLang);
+                    }
+                } else {
+                    return type.compareTo(other.type);
+                }
+            } else {
+                return category.compareTo(other.category);
+            }
+        }
     }
 
     /**
@@ -268,5 +453,17 @@ public class DiscoverInfo extends IQ {
             buf.append("<feature var=\"").append(StringUtils.escapeForXML(variable)).append("\"/>");
             return buf.toString();
         }
+
+        public boolean equals(Object obj) {
+            if (obj == null)
+                return false;
+            if (obj == this)
+                return true;
+            if (obj.getClass() != getClass())
+                return false;
+
+            DiscoverInfo.Feature other = (DiscoverInfo.Feature) obj;
+            return variable.equals(other.variable);
+        }
     }
 }

source/org/jivesoftware/smackx/packet/DiscoverItems.java

@@ -23,6 +23,7 @@ package org.jivesoftware.smackx.packet;
 import org.jivesoftware.smack.packet.IQ;
 import org.jivesoftware.smack.util.StringUtils;
 
+import java.util.Collection;
 import java.util.Collections;
 import java.util.Iterator;
 import java.util.List;
@@ -55,6 +56,18 @@ public class DiscoverItems extends IQ {
         }
     }
 
+    /**
+     * Adds a collection of items to the discovered information. Does nothing if itemsToAdd is null
+     *
+     * @param itemsToAdd
+     */
+    public void addItems(Collection<Item> itemsToAdd) {
+        if (itemsToAdd == null) return;
+        for (Item i : itemsToAdd) {
+            addItem(i);
+        }
+    }
+
     /**
      * Returns the discovered items of the queried XMPP entity. 
      *

source/org/jivesoftware/smackx/provider/DiscoverInfoProvider.java

@@ -42,6 +42,7 @@ public class DiscoverInfoProvider implements IQProvider {
         String name = "";
         String type = "";
         String variable = "";
+        String lang = "";
         discoverInfo.setNode(parser.getAttributeValue("", "node"));
         while (!done) {
             int eventType = parser.next();
@@ -51,6 +52,7 @@ public class DiscoverInfoProvider implements IQProvider {
                     category = parser.getAttributeValue("", "category");
                     name = parser.getAttributeValue("", "name");
                     type = parser.getAttributeValue("", "type");
+                    lang = parser.getAttributeValue(parser.getNamespace("xml"), "lang");
                 }
                 else if (parser.getName().equals("feature")) {
                     // Initialize the variables from the parsed XML
@@ -64,8 +66,9 @@ public class DiscoverInfoProvider implements IQProvider {
             } else if (eventType == XmlPullParser.END_TAG) {
                 if (parser.getName().equals("identity")) {
                     // Create a new identity and add it to the discovered info.
-                    identity = new DiscoverInfo.Identity(category, name);
+                    identity = new DiscoverInfo.Identity(category, name, type);
-                    identity.setType(type);
+                    if (lang != null)
+                        identity.setLanguage(lang);
                     discoverInfo.addIdentity(identity);
                 }
                 if (parser.getName().equals("feature")) {

test-unit/org/jivesoftware/smackx/bytestreams/socks5/Socks5ByteStreamManagerTest.java

@@ -247,8 +247,7 @@ public class Socks5ByteStreamManagerTest {
         // build discover info for proxy containing information about NOT being a Socks5
         // proxy
         DiscoverInfo proxyInfo = Socks5PacketUtils.createDiscoverInfo(proxyJID, initiatorJID);
-        Identity identity = new Identity("noproxy", proxyJID);
+        Identity identity = new Identity("noproxy", proxyJID, "bytestreams");
-        identity.setType("bytestreams");
         proxyInfo.addIdentity(identity);
 
         // return the proxy identity if proxy is queried
@@ -312,8 +311,7 @@ public class Socks5ByteStreamManagerTest {
         // build discover info for proxy containing information about NOT being a Socks5
         // proxy
         DiscoverInfo proxyInfo = Socks5PacketUtils.createDiscoverInfo(proxyJID, initiatorJID);
-        Identity identity = new Identity("noproxy", proxyJID);
+        Identity identity = new Identity("noproxy", proxyJID, "bytestreams");
-        identity.setType("bytestreams");
         proxyInfo.addIdentity(identity);
 
         // return the proxy identity if proxy is queried
@@ -403,8 +401,7 @@ public class Socks5ByteStreamManagerTest {
 
         // build discover info for proxy containing information about being a SOCKS5 proxy
         DiscoverInfo proxyInfo = Socks5PacketUtils.createDiscoverInfo(proxyJID, initiatorJID);
-        Identity identity = new Identity("proxy", proxyJID);
+        Identity identity = new Identity("proxy", proxyJID, "bytestreams");
-        identity.setType("bytestreams");
         proxyInfo.addIdentity(identity);
 
         // return the socks5 bytestream proxy identity if proxy is queried
@@ -494,8 +491,7 @@ public class Socks5ByteStreamManagerTest {
 
         // build discover info for proxy containing information about being a SOCKS5 proxy
         DiscoverInfo proxyInfo = Socks5PacketUtils.createDiscoverInfo(proxyJID, initiatorJID);
-        Identity identity = new Identity("proxy", proxyJID);
+        Identity identity = new Identity("proxy", proxyJID, "bytestreams");
-        identity.setType("bytestreams");
         proxyInfo.addIdentity(identity);
 
         // return the socks5 bytestream proxy identity if proxy is queried
@@ -577,8 +573,7 @@ public class Socks5ByteStreamManagerTest {
 
         // build discover info for proxy containing information about being a SOCKS5 proxy
         DiscoverInfo proxyInfo = Socks5PacketUtils.createDiscoverInfo(proxyJID, initiatorJID);
-        Identity identity = new Identity("proxy", proxyJID);
+        Identity identity = new Identity("proxy", proxyJID, "bytestreams");
-        identity.setType("bytestreams");
         proxyInfo.addIdentity(identity);
 
         // return the socks5 bytestream proxy identity if proxy is queried
@@ -672,8 +667,7 @@ public class Socks5ByteStreamManagerTest {
 
         // build discover info for proxy containing information about being a SOCKS5 proxy
         DiscoverInfo proxyInfo = Socks5PacketUtils.createDiscoverInfo(proxyJID, initiatorJID);
-        Identity identity = new Identity("proxy", proxyJID);
+        Identity identity = new Identity("proxy", proxyJID, "bytestreams");
-        identity.setType("bytestreams");
         proxyInfo.addIdentity(identity);
 
         // return the socks5 bytestream proxy identity if proxy is queried
@@ -1026,7 +1020,7 @@ public class Socks5ByteStreamManagerTest {
          */
         DiscoverInfo proxyInfo1 = Socks5PacketUtils.createDiscoverInfo("proxy2.xmpp-server",
                         initiatorJID);
-        Identity identity1 = new Identity("proxy", "proxy2.xmpp-server");
+        Identity identity1 = new Identity("proxy", "proxy2.xmpp-server", "bytestreams");
         identity1.setType("bytestreams");
         proxyInfo1.addIdentity(identity1);
 
@@ -1036,8 +1030,7 @@ public class Socks5ByteStreamManagerTest {
 
         // build discover info for proxy containing information about being a SOCKS5 proxy
         DiscoverInfo proxyInfo2 = Socks5PacketUtils.createDiscoverInfo(proxyJID, initiatorJID);
-        Identity identity2 = new Identity("proxy", proxyJID);
+        Identity identity2 = new Identity("proxy", proxyJID, "bytestreams");
-        identity2.setType("bytestreams");
         proxyInfo2.addIdentity(identity2);
 
         // return the SOCKS5 bytestream proxy identity if proxy is queried

test-unit/org/jivesoftware/smackx/entitycaps/EntityCapsManagerTest.java

@@ -0,0 +1,227 @@
+package org.jivesoftware.smackx.entitycaps;
+
+import static org.junit.Assert.*;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.Collection;
+import java.util.LinkedList;
+
+import org.jivesoftware.smack.packet.IQ;
+import org.jivesoftware.smack.util.Base32Encoder;
+import org.jivesoftware.smack.util.Base64Encoder;
+import org.jivesoftware.smack.util.StringEncoder;
+import org.jivesoftware.smackx.FormField;
+import org.jivesoftware.smackx.entitycaps.EntityCapsManager;
+import org.jivesoftware.smackx.entitycaps.cache.EntityCapsPersistentCache;
+import org.jivesoftware.smackx.entitycaps.cache.SimpleDirectoryPersistentCache;
+import org.jivesoftware.smackx.packet.DataForm;
+import org.jivesoftware.smackx.packet.DiscoverInfo;
+import org.junit.Test;
+
+
+public class EntityCapsManagerTest {
+
+    /**
+     * <a href="http://xmpp.org/extensions/xep-0115.html#ver-gen-complex">XEP-
+     * 0115 Complex Generation Example</a>
+     */
+    @Test
+    public void testComplexGenerationExample() {
+        DiscoverInfo di = createComplexSamplePacket();
+
+        String ver = EntityCapsManager.generateVerificationString(di, "sha-1");
+        assertEquals("q07IKJEyjvHSyhy//CH0CxmKi8w=", ver);
+    }
+
+    @Test
+    public void testSimpleDirectoryCacheBase64() throws IOException {
+        EntityCapsManager.persistentCache = null;
+        testSimpleDirectoryCache(Base64Encoder.getInstance());
+    }
+
+    @Test
+    public void testSimpleDirectoryCacheBase32() throws IOException {
+        EntityCapsManager.persistentCache = null;
+        testSimpleDirectoryCache(Base32Encoder.getInstance());
+    }
+
+    @Test
+    public void testVerificationDuplicateFeatures() {
+        DiscoverInfo di = createMalformedDiscoverInfo();
+        assertTrue(di.containsDuplicateFeatures());
+    }
+
+    @Test
+    public void testVerificationDuplicateIdentities() {
+        DiscoverInfo di = createMalformedDiscoverInfo();
+        assertTrue(di.containsDuplicateIdentities());
+    }
+
+    @Test
+    public void testVerificationDuplicateDataForm() {
+        DiscoverInfo di = createMalformedDiscoverInfo();
+        assertTrue(EntityCapsManager.verifyPacketExtensions(di));
+    }
+
+    private void testSimpleDirectoryCache(StringEncoder stringEncoder) throws IOException {
+
+        EntityCapsPersistentCache cache = new SimpleDirectoryPersistentCache(createTempDirectory());
+        EntityCapsManager.setPersistentCache(cache);
+
+        DiscoverInfo di = createComplexSamplePacket();
+        String nodeVer = di.getNode() + "#" + EntityCapsManager.generateVerificationString(di, "sha-1");
+
+        // Save the data in EntityCapsManager
+        EntityCapsManager.addDiscoverInfoByNode(nodeVer, di);
+
+        // Lose all the data
+        EntityCapsManager.caps.clear();
+
+        // Restore the data from the persistent Cache
+        cache.replay();
+
+        DiscoverInfo restored_di = EntityCapsManager.getDiscoveryInfoByNodeVer(nodeVer);
+        assertNotNull(restored_di);
+        assertEquals(di.toXML(), restored_di.toXML());
+    }
+
+    private static DiscoverInfo createComplexSamplePacket() {
+        DiscoverInfo di = new DiscoverInfo();
+        di.setFrom("benvolio@capulet.lit/230193");
+        di.setPacketID("disco1");
+        di.setTo("juliet@capulet.lit/chamber");
+        di.setType(IQ.Type.RESULT);
+
+        Collection<DiscoverInfo.Identity> identities = new LinkedList<DiscoverInfo.Identity>();
+        DiscoverInfo.Identity i = new DiscoverInfo.Identity("client", "Psi 0.11", "pc");
+        i.setLanguage("en");
+        identities.add(i);
+        i = new DiscoverInfo.Identity("client", "Ψ 0.11", "pc");
+        i.setLanguage("el");
+        identities.add(i);
+        di.addIdentities(identities);
+
+        di.addFeature("http://jabber.org/protocol/disco#items");
+        di.addFeature(EntityCapsManager.NAMESPACE);
+        di.addFeature("http://jabber.org/protocol/muc");
+        di.addFeature("http://jabber.org/protocol/disco#info");
+
+        DataForm df = new DataForm("result");
+
+        FormField ff = new FormField("os");
+        ff.addValue("Mac");
+        df.addField(ff);
+
+        ff = new FormField("FORM_TYPE");
+        ff.setType("hidden");
+        ff.addValue("urn:xmpp:dataforms:softwareinfo");
+        df.addField(ff);
+
+        ff = new FormField("ip_version");
+        ff.addValue("ipv4");
+        ff.addValue("ipv6");
+        df.addField(ff);
+
+        ff = new FormField("os_version");
+        ff.addValue("10.5.1");
+        df.addField(ff);
+
+        ff = new FormField("software");
+        ff.addValue("Psi");
+        df.addField(ff);
+
+        ff = new FormField("software_version");
+        ff.addValue("0.11");
+        df.addField(ff);
+
+        di.addExtension(df);
+        return di;
+    }
+
+    private static DiscoverInfo createMalformedDiscoverInfo() {
+        DiscoverInfo di = new DiscoverInfo();
+        di.setFrom("benvolio@capulet.lit/230193");
+        di.setPacketID("disco1");
+        di.setTo(")juliet@capulet.lit/chamber");
+        di.setType(IQ.Type.RESULT);
+
+        Collection<DiscoverInfo.Identity> identities = new LinkedList<DiscoverInfo.Identity>();
+        DiscoverInfo.Identity i = new DiscoverInfo.Identity("client", "Psi 0.11", "pc");
+        i.setLanguage("en");
+        identities.add(i);
+        i = new DiscoverInfo.Identity("client", "Ψ 0.11", "pc");
+        i.setLanguage("el");
+        identities.add(i);
+        di.addIdentities(identities);
+        // Failure 1: Duplicate identities
+        i = new DiscoverInfo.Identity("client", "Ψ 0.11", "pc");
+        i.setLanguage("el");
+        identities.add(i);
+        di.addIdentities(identities);
+
+        di.addFeature("http://jabber.org/protocol/disco#items");
+        di.addFeature(EntityCapsManager.NAMESPACE);
+        di.addFeature("http://jabber.org/protocol/muc");
+        di.addFeature("http://jabber.org/protocol/disco#info");
+        // Failure 2: Duplicate features
+        di.addFeature("http://jabber.org/protocol/disco#info");
+
+        DataForm df = new DataForm("result");
+
+        FormField ff = new FormField("os");
+        ff.addValue("Mac");
+        df.addField(ff);
+
+        ff = new FormField("FORM_TYPE");
+        ff.setType("hidden");
+        ff.addValue("urn:xmpp:dataforms:softwareinfo");
+        df.addField(ff);
+
+        ff = new FormField("ip_version");
+        ff.addValue("ipv4");
+        ff.addValue("ipv6");
+        df.addField(ff);
+
+        ff = new FormField("os_version");
+        ff.addValue("10.5.1");
+        df.addField(ff);
+
+        ff = new FormField("software");
+        ff.addValue("Psi");
+        df.addField(ff);
+
+        ff = new FormField("software_version");
+        ff.addValue("0.11");
+        df.addField(ff);
+
+        di.addExtension(df);
+
+        // Failure 3: Another service discovery information form with the same
+        // FORM_TYPE
+        df = new DataForm("result");
+
+        ff = new FormField("FORM_TYPE");
+        ff.setType("hidden");
+        ff.addValue("urn:xmpp:dataforms:softwareinfo");
+        df.addField(ff);
+
+        ff = new FormField("software");
+        ff.addValue("smack");
+        df.addField(ff);
+
+        di.addExtension(df);
+
+        return di;
+    }
+
+    public static File createTempDirectory() throws IOException {
+        String tmpdir = System.getProperty("java.io.tmpdir");
+        File tmp;
+        tmp = File.createTempFile(tmpdir, "entityCaps");
+        tmp.delete();
+        tmp.mkdir();
+        return tmp;
+    }
+
+}

test-unit/org/jivesoftware/smackx/pubsub/ConfigureFormTest.java

@@ -50,8 +50,7 @@ public class ConfigureFormTest
 		ThreadedDummyConnection con = new ThreadedDummyConnection();
 		PubSubManager mgr = new PubSubManager(con);
 		DiscoverInfo info = new DiscoverInfo();
-		Identity ident = new Identity("pubsub", null);
+		Identity ident = new Identity("pubsub", null, "leaf");
-		ident.setType("leaf");
 		info.addIdentity(ident);
 		con.addIQReply(info);
 		
@@ -78,8 +77,7 @@ public class ConfigureFormTest
 		ThreadedDummyConnection con = new ThreadedDummyConnection();
 		PubSubManager mgr = new PubSubManager(con);
 		DiscoverInfo info = new DiscoverInfo();
-		Identity ident = new Identity("pubsub", null);
+		Identity ident = new Identity("pubsub", null, "leaf");
-		ident.setType("leaf");
 		info.addIdentity(ident);
 		con.addIQReply(info);
 		

test/org/jivesoftware/smack/test/SmackTestCase.java

@@ -34,6 +34,7 @@ import junit.framework.TestCase;
 import org.jivesoftware.smack.ConnectionConfiguration;
 import org.jivesoftware.smack.XMPPConnection;
 import org.jivesoftware.smack.XMPPException;
+import org.jivesoftware.smack.util.ConnectionUtils;
 import org.xmlpull.mxp1.MXParser;
 import org.xmlpull.v1.XmlPullParser;
 
@@ -504,6 +505,15 @@ public abstract class SmackTestCase extends TestCase {
         return "config/" + fullClassName.substring(firstChar) + ".xml";
     }
 
+    /**
+     * Subscribes all connections with each other: They all become friends
+     * 
+     * @throws XMPPException
+     */
+    protected void letsAllBeFriends() throws XMPPException {
+        ConnectionUtils.letsAllBeFriends(connections);
+    }
+
     /**
      * Compares two contents of two byte arrays to make sure that they are equal
      *

test/org/jivesoftware/smack/util/ConnectionUtils.java

@@ -0,0 +1,27 @@
+package org.jivesoftware.smack.util;
+
+import org.jivesoftware.smack.Connection;
+import org.jivesoftware.smack.Roster;
+import org.jivesoftware.smack.XMPPException;
+
+public class ConnectionUtils {
+
+    public static void becomeFriends(Connection con0, Connection con1) throws XMPPException {
+        Roster r0 = con0.getRoster();
+        Roster r1 = con1.getRoster();
+        r0.setSubscriptionMode(Roster.SubscriptionMode.accept_all);
+        r1.setSubscriptionMode(Roster.SubscriptionMode.accept_all);
+        r0.createEntry(con1.getUser(), "u2", null);
+        r1.createEntry(con0.getUser(), "u1", null);
+    }
+
+    public static void letsAllBeFriends(Connection[] connections) throws XMPPException {
+        for (Connection c1 : connections) {
+            for (Connection c2 : connections) {
+                if (c1 == c2)
+                    continue;
+                becomeFriends(c1, c2);
+            }
+        }
+    }
+}

test/org/jivesoftware/smackx/entitycaps/EntityCapsTest.java

@@ -0,0 +1,147 @@
+package org.jivesoftware.smackx.entitycaps;
+
+import org.jivesoftware.smack.PacketListener;
+import org.jivesoftware.smack.SmackConfiguration;
+import org.jivesoftware.smack.XMPPConnection;
+import org.jivesoftware.smack.XMPPException;
+import org.jivesoftware.smack.filter.AndFilter;
+import org.jivesoftware.smack.filter.PacketTypeFilter;
+import org.jivesoftware.smack.filter.IQTypeFilter;
+import org.jivesoftware.smack.packet.IQ;
+import org.jivesoftware.smack.packet.Packet;
+import org.jivesoftware.smack.test.SmackTestCase;
+import org.jivesoftware.smackx.ServiceDiscoveryManager;
+import org.jivesoftware.smackx.packet.DiscoverInfo;
+
+public class EntityCapsTest extends SmackTestCase {
+
+    private static final String DISCOVER_TEST_FEATURE = "entityCapsTest";
+
+    XMPPConnection con0;
+    XMPPConnection con1;
+    EntityCapsManager ecm0;
+    EntityCapsManager ecm1;
+    ServiceDiscoveryManager sdm0;
+    ServiceDiscoveryManager sdm1;
+
+    private boolean discoInfoSend = false;
+
+    public EntityCapsTest(String arg0) {
+        super(arg0);
+    }
+
+    @Override
+    protected int getMaxConnections() {
+        return 2;
+    }
+
+    protected void setUp() throws Exception {
+        super.setUp();
+        SmackConfiguration.setAutoEnableEntityCaps(true);
+        SmackConfiguration.setPacketReplyTimeout(1000 * 60 * 5);
+        con0 = getConnection(0);
+        con1 = getConnection(1);
+        ecm0 = EntityCapsManager.getInstanceFor(getConnection(0));
+        ecm1 = EntityCapsManager.getInstanceFor(getConnection(1));
+        sdm0 = ServiceDiscoveryManager.getInstanceFor(con0);
+        sdm1 = ServiceDiscoveryManager.getInstanceFor(con1);
+        letsAllBeFriends();
+    }
+
+    public void testLocalEntityCaps() throws InterruptedException {
+        DiscoverInfo info = EntityCapsManager.getDiscoveryInfoByNodeVer(ecm1.getLocalNodeVer());
+        assertFalse(info.containsFeature(DISCOVER_TEST_FEATURE));
+
+        dropWholeEntityCapsCache();
+
+        // This should cause a new presence stanza from con1 with and updated
+        // 'ver' String
+        sdm1.addFeature(DISCOVER_TEST_FEATURE);
+
+        // Give the server some time to handle the stanza and send it to con0
+        Thread.sleep(2000);
+
+        // The presence stanza should get received by con0 and the data should
+        // be recorded in the map
+        // Note that while both connections use the same static Entity Caps
+        // cache,
+        // it's assured that *not* con1 added the data to the Entity Caps cache.
+        // Every time the entities features
+        // and identities change only a new caps 'ver' is calculated and send
+        // with the presence stanza
+        // The other connection has to receive this stanza and record the
+        // information in order for this test to succeed.
+        info = EntityCapsManager.getDiscoveryInfoByNodeVer(ecm1.getLocalNodeVer());
+        assertNotNull(info);
+        assertTrue(info.containsFeature(DISCOVER_TEST_FEATURE));
+    }
+
+    /**
+     * Test if entity caps actually prevent a disco info request and reply
+     * 
+     * @throws XMPPException
+     * 
+     */
+    public void testPreventDiscoInfo() throws XMPPException {
+        con0.addPacketSendingListener(new PacketListener() {
+
+            @Override
+            public void processPacket(Packet packet) {
+                discoInfoSend = true;
+            }
+
+        }, new AndFilter(new PacketTypeFilter(DiscoverInfo.class), new IQTypeFilter(IQ.Type.GET)));
+
+        // add a bogus feature so that con1 ver won't match con0's
+        sdm1.addFeature(DISCOVER_TEST_FEATURE);
+
+        dropCapsCache();
+        // discover that
+        DiscoverInfo info = sdm0.discoverInfo(con1.getUser());
+        // that discovery should cause a disco#info
+        assertTrue(discoInfoSend);
+        assertTrue(info.containsFeature(DISCOVER_TEST_FEATURE));
+        discoInfoSend = false;
+
+        // discover that
+        info = sdm0.discoverInfo(con1.getUser());
+        // that discovery shouldn't cause a disco#info
+        assertFalse(discoInfoSend);
+        assertTrue(info.containsFeature(DISCOVER_TEST_FEATURE));
+    }
+
+    public void testCapsChanged() {
+        String nodeVerBefore = EntityCapsManager.getNodeVersionByJid(con1.getUser());
+        sdm1.addFeature(DISCOVER_TEST_FEATURE);
+        String nodeVerAfter = EntityCapsManager.getNodeVersionByJid(con1.getUser());
+
+        assertFalse(nodeVerBefore.equals(nodeVerAfter));
+    }
+
+    public void testEntityCaps() throws XMPPException, InterruptedException {
+        dropWholeEntityCapsCache();
+        sdm1.addFeature(DISCOVER_TEST_FEATURE);
+
+        Thread.sleep(3000);
+
+        DiscoverInfo info = sdm0.discoverInfo(con1.getUser());
+        assertTrue(info.containsFeature(DISCOVER_TEST_FEATURE));
+
+        String u1ver = EntityCapsManager.getNodeVersionByJid(con1.getUser());
+        assertNotNull(u1ver);
+
+        DiscoverInfo entityInfo = EntityCapsManager.caps.get(u1ver);
+        assertNotNull(entityInfo);
+
+        assertEquals(info.toXML(), entityInfo.toXML());
+    }
+
+    private static void dropWholeEntityCapsCache() {
+        EntityCapsManager.caps.clear();
+        EntityCapsManager.jidCaps.clear();
+    }
+
+    private static void dropCapsCache() {
+        EntityCapsManager.caps.clear();
+    }
+}