/**
* Handles incoming presence packets and maps jids to node#ver strings.
*
* @param packet the incoming presence <tt>Packet</tt> to be handled
* @see PacketListener#processPacket(Packet)
*/
public void processPacket(Packet packet) {
CapsPacketExtension ext =
(CapsPacketExtension)
packet.getExtension(CapsPacketExtension.ELEMENT_NAME, CapsPacketExtension.NAMESPACE);
/*
* Before Version 1.4 of XEP-0115: Entity Capabilities, the 'ver'
* attribute was generated differently and the 'hash' attribute was
* absent. The 'ver' attribute in Version 1.3 represents the
* specific version of the client and thus does not provide a way to
* validate the DiscoverInfo sent by the client. If
* EntityCapsManager receives no 'hash' attribute, it will assume
* the legacy format and will not cache it because the DiscoverInfo
* to be received from the client later on will not be trustworthy.
*/
String hash = ext.getHash();
/* Google Talk web does not set hash but we need it to be cached */
if (hash == null) hash = "";
if (hash != null) {
// Check it the packet indicates that the user is online. We
// will use this information to decide if we're going to send
// the discover info request.
boolean online = (packet instanceof Presence) && ((Presence) packet).isAvailable();
if (online) {
addUserCapsNode(
packet.getFrom(), ext.getNode(), hash, ext.getVersion(), ext.getExtensions(), online);
} else {
removeUserCapsNode(packet.getFrom());
}
}
}
