From b7e2854f3bd4ec2d7c31278608351f1f5fd3dcaa Mon Sep 17 00:00:00 2001
From: Lishunyang <lishunyang@pku.edu.cn>
Date: Mon, 11 Aug 2014 23:38:17 +0800
Subject: [PATCH] Add SctpMapExtension and provider.

---
 .../extensions/jingle/SctpMapExtension.java   | 162 ++++++++++++++++++
 .../jingle/SctpMapExtensionProvider.java      |  46 +++++
 2 files changed, 208 insertions(+)
 create mode 100644 src/net/java/sip/communicator/impl/protocol/jabber/extensions/jingle/SctpMapExtension.java
 create mode 100644 src/net/java/sip/communicator/impl/protocol/jabber/extensions/jingle/SctpMapExtensionProvider.java

diff --git a/src/net/java/sip/communicator/impl/protocol/jabber/extensions/jingle/SctpMapExtension.java b/src/net/java/sip/communicator/impl/protocol/jabber/extensions/jingle/SctpMapExtension.java
new file mode 100644
index 000000000..3d62c2052
--- /dev/null
+++ b/src/net/java/sip/communicator/impl/protocol/jabber/extensions/jingle/SctpMapExtension.java
@@ -0,0 +1,162 @@
+/*
+ * Jitsi, the OpenSource Java VoIP and Instant Messaging client.
+ *
+ * Distributable under LGPL license.
+ * See terms of license at gnu.org.
+ */
+package org.jitsi.jirecon.extension;
+
+import org.jivesoftware.smack.packet.PacketExtension;
+
+/**
+ * SctpMap extension in transport packet extension.
+ * Defined by XEP-0343: Signaling WebRTC datachannels in Jingle.
+ * 
+ * @author lishunyang
+ * 
+ */
+public class SctpMapExtension
+    implements PacketExtension
+{
+    /**
+     * The name of the "sctpmap" element.
+     */
+    public static final String ELEMENT_NAME = "sctpmap";
+
+    /**
+     * The namespace for the "sctpmap" element.
+     */
+    public static final String NAMESPACE =
+        "urn:xmpp:jingle:transports:dtls-sctp:1";
+
+    /**
+     * Port number of "sctpmap" element.
+     */
+    public static final String PORT_ATTR_NAME = "number";
+
+    /**
+     * Protocol name of "sctpmap" element.
+     */
+    public static final String PROTOCOL_ATTR_NAME = "protocol";
+
+    /**
+     * Number of streams of "sctpmap" element.
+     */
+    public static final String STREAMS_ATTR_NAME = "streams";
+
+    /**
+     * Value of "port".
+     */
+    private int port = -1;
+
+    /**
+     * Value of "protocol".
+     * @See SctpMapExtension.Protocol
+     */
+    private String protocol = "";
+
+    /**
+     * Number of "streams".
+     */
+    private int streams = -1;
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public String getElementName()
+    {
+        return ELEMENT_NAME;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public String getNamespace()
+    {
+        return NAMESPACE;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public String toXML()
+    {
+        StringBuilder builder = new StringBuilder();
+
+        builder.append("<").append(getElementName());
+        builder.append(" ").append("xmlns").append("='").append(getNamespace())
+            .append("'");
+        builder.append(" ").append(PORT_ATTR_NAME).append("='").append(port)
+            .append("'");
+        builder.append(" ").append(PROTOCOL_ATTR_NAME).append("='")
+            .append(protocol).append("'");
+        builder.append(" ").append(STREAMS_ATTR_NAME).append("='")
+            .append(streams).append("'");
+        builder.append("/>");
+
+        return builder.toString();
+    }
+
+    public void setPort(int port)
+    {
+        this.port = port;
+    }
+
+    public int getPort()
+    {
+        return port;
+    }
+
+    public void setProtocol(String protocol)
+    {
+        this.protocol = protocol;
+    }
+
+    public void setProtocol(Protocol protocol)
+    {
+        this.protocol = protocol.toString();
+    }
+
+    public String getProtocol()
+    {
+        return protocol;
+    }
+
+    public void setStreams(int streams)
+    {
+        this.streams = streams;
+    }
+
+    public int getStreams()
+    {
+        return streams;
+    }
+
+    /**
+     * Protocol enumeration of <tt>SctpMapExtension</tt>. Currently it only
+     * contains WEBRTC_CHANNEL.
+     * 
+     * @author lishunyang
+     * 
+     */
+    public static enum Protocol
+    {
+        WEBRTC_CHANNEL("webrtc-datachannel");
+
+        private String name;
+
+        private Protocol(String name)
+        {
+            this.name = name;
+        }
+
+        @Override
+        public String toString()
+        {
+            return name;
+        }
+    }
+}
diff --git a/src/net/java/sip/communicator/impl/protocol/jabber/extensions/jingle/SctpMapExtensionProvider.java b/src/net/java/sip/communicator/impl/protocol/jabber/extensions/jingle/SctpMapExtensionProvider.java
new file mode 100644
index 000000000..f205c8c01
--- /dev/null
+++ b/src/net/java/sip/communicator/impl/protocol/jabber/extensions/jingle/SctpMapExtensionProvider.java
@@ -0,0 +1,46 @@
+/*
+ * Jitsi, the OpenSource Java VoIP and Instant Messaging client.
+ *
+ * Distributable under LGPL license.
+ * See terms of license at gnu.org.
+ */
+package org.jitsi.jirecon.extension;
+
+import org.jivesoftware.smack.packet.*;
+import org.jivesoftware.smack.provider.*;
+import org.xmlpull.v1.XmlPullParser;
+
+/**
+ * The <tt>SctpMapExtensionProvider</tt> parses "sctpmap" elements into
+ * <tt>SctpMapExtension</tt> instances.
+ * 
+ * @author lishunyang
+ * @see SctpMapExtension
+ */
+public class SctpMapExtensionProvider
+    implements PacketExtensionProvider
+{
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public PacketExtension parseExtension(XmlPullParser parser)
+        throws Exception
+    {
+        SctpMapExtension result = new SctpMapExtension();
+
+        if (parser.getName().equals(SctpMapExtension.ELEMENT_NAME)
+            && parser.getNamespace().equals(SctpMapExtension.NAMESPACE))
+        {
+            result.setPort(Integer.parseInt(parser.getAttributeValue(null,
+                SctpMapExtension.PORT_ATTR_NAME)));
+            result.setProtocol(parser.getAttributeValue(null,
+                SctpMapExtension.PROTOCOL_ATTR_NAME));
+            result.setStreams(Integer.parseInt(parser.getAttributeValue(null,
+                SctpMapExtension.STREAMS_ATTR_NAME)));
+        }
+
+        return result;
+    }
+}