1 files changed, 127 insertions, 0 deletions
diff --git a/src/org/jivesoftware/smackx/bytestreams/ibb/InitiationListener.java b/src/org/jivesoftware/smackx/bytestreams/ibb/InitiationListener.java
new file mode 100644
index 0000000..0ecb081
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+++ b/src/org/jivesoftware/smackx/bytestreams/ibb/InitiationListener.java
@@ -0,0 +1,127 @@
+/**
+ * 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.bytestreams.ibb;
+
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.Executors;
+
+import org.jivesoftware.smack.PacketListener;
+import org.jivesoftware.smack.filter.AndFilter;
+import org.jivesoftware.smack.filter.IQTypeFilter;
+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.smackx.bytestreams.BytestreamListener;
+import org.jivesoftware.smackx.bytestreams.ibb.packet.Open;
+
+/**
+ * InitiationListener handles all incoming In-Band Bytestream open requests. If there are no
+ * listeners for a In-Band Bytestream request InitiationListener will always refuse the request and
+ * reply with a &lt;not-acceptable/&gt; error (<a
+ * href="http://xmpp.org/extensions/xep-0047.html#example-5" >XEP-0047</a> Section 2.1).
+ * <p>
+ * All In-Band Bytestream request having a block size greater than the maximum allowed block size
+ * for this connection are rejected with an &lt;resource-constraint/&gt; error. The maximum block
+ * size can be set by invoking {@link InBandBytestreamManager#setMaximumBlockSize(int)}.
+ * 
+ * @author Henning Staib
+ */
+class InitiationListener implements PacketListener {
+
+    /* manager containing the listeners and the XMPP connection */
+    private final InBandBytestreamManager manager;
+
+    /* packet filter for all In-Band Bytestream requests */
+    private final PacketFilter initFilter = new AndFilter(new PacketTypeFilter(Open.class),
+                    new IQTypeFilter(IQ.Type.SET));
+
+    /* executor service to process incoming requests concurrently */
+    private final ExecutorService initiationListenerExecutor;
+
+    /**
+     * Constructor.
+     * 
+     * @param manager the In-Band Bytestream manager
+     */
+    protected InitiationListener(InBandBytestreamManager manager) {
+        this.manager = manager;
+        initiationListenerExecutor = Executors.newCachedThreadPool();
+    }
+
+    public void processPacket(final Packet packet) {
+        initiationListenerExecutor.execute(new Runnable() {
+
+            public void run() {
+                processRequest(packet);
+            }
+        });
+    }
+
+    private void processRequest(Packet packet) {
+        Open ibbRequest = (Open) packet;
+
+        // validate that block size is within allowed range
+        if (ibbRequest.getBlockSize() > this.manager.getMaximumBlockSize()) {
+            this.manager.replyResourceConstraintPacket(ibbRequest);
+            return;
+        }
+
+        // ignore request if in ignore list
+        if (this.manager.getIgnoredBytestreamRequests().remove(ibbRequest.getSessionID()))
+            return;
+
+        // build bytestream request from packet
+        InBandBytestreamRequest request = new InBandBytestreamRequest(this.manager, ibbRequest);
+
+        // notify listeners for bytestream initiation from a specific user
+        BytestreamListener userListener = this.manager.getUserListener(ibbRequest.getFrom());
+        if (userListener != null) {
+            userListener.incomingBytestreamRequest(request);
+
+        }
+        else if (!this.manager.getAllRequestListeners().isEmpty()) {
+            /*
+             * if there is no user specific listener inform listeners for all initiation requests
+             */
+            for (BytestreamListener listener : this.manager.getAllRequestListeners()) {
+                listener.incomingBytestreamRequest(request);
+            }
+
+        }
+        else {
+            /*
+             * if there is no listener for this initiation request, reply with reject message
+             */
+            this.manager.replyRejectPacket(ibbRequest);
+        }
+    }
+
+    /**
+     * Returns the packet filter for In-Band Bytestream open requests.
+     * 
+     * @return the packet filter for In-Band Bytestream open requests
+     */
+    protected PacketFilter getFilter() {
+        return this.initFilter;
+    }
+
+    /**
+     * Shuts down the listeners executor service.
+     */
+    protected void shutdown() {
+        this.initiationListenerExecutor.shutdownNow();
+    }
+
+}