Smack Extensions User Manual

The XMPP protocol includes a base protocol and many optional extensions typically documented as "XEP's". Smack provides the org.jivesoftware.smack package for the core XMPP protocol, and the org.jivesoftware.smackx package for many of the protocol extensions.

This manual provides details about each of the "smackx" extensions, including what it is, how to use it, and some simple example code.

Currently supported XEPs of Smack (all subprojects)

Name	XEP	Description
Nonzas	XEP-0360	Defines the term "Nonza", describing every top level stream element that is not a Stanza.

Currently supported XEPs of smack-tcp

Name	XEP	Description
Stream Management	XEP-0198	Allows active management of an XML Stream between two XMPP entities (stanza acknowledgement, stream resumption).

Smack Extensions and currently supported XEPs of smack-extensions

Name	XEP	Description
Data Forms	XEP-0004	Allows to gather data using Forms.
Last Activity	XEP-0012	Communicating information about the last activity associated with an XMPP entity.
Flexible Offline Message Retrieval	XEP-0013	Extension for flexible, POP3-like handling of offline messages.
Privacy Lists	XEP-0016	Enabling or disabling communication with other entities.
Service Discovery	XEP-0030	Allows to discover services in XMPP entities.
Extended Stanza Addressing	XEP-0033	Allows to include headers in stanzas in order to specifiy multiple recipients or sub-addresses.
Multi User Chat	XEP-0045	Allows configuration of, participation in, and administration of individual text-based conference rooms.
In-Band Bytestreams	XEP-0047	Enables any two entities to establish a one-to-one bytestream between themselves using plain XMPP.
Bookmarks	XEP-0048	Bookmarks, for e.g. MUC and web pages.
Private Data	XEP-0049	Manages private data.
Ad-Hoc Commands	XEP-0050	Advertising and executing application-specific commands.
vcard-temp	XEP-0054	The vCard-XML format currently in use.
Jabber Search	XEP-0055	Search information repositories on the XMPP network.
Result Set Management	XEP-0059	Page through and otherwise manage the receipt of large result sets
PubSub	XEP-0060	Generic publish and subscribe functionality.
SOCKS5 Bytestrams	XEP-0065	Out-of-band bytestream between any two XMPP entities.
XHTML-IM	XEP-0071	Allows send and receiving formatted messages using XHTML.
In-Band Registration	XEP-0077	In-band registration with XMPP services.
Advanced Message Processing	XEP-0079	Enables entities to request, and servers to perform, advanced processing of XMPP message stanzas.
User Location	XEP-0080	Enabled communicating information about the current geographical or physical location of an entity.
XMPP Date Time Profiles	XEP-0082	Standardization of Date and Time representation in XMPP.
Chat State Notifications	XEP-0085	Communicating the status of a user in a chat session.
Time Exchange	XEP-0090	Allows local time information to be shared between users.
Software Version	XEP-0092	Retrieve and announce the software application of an XMPP entity.
Stream Initation	XEP-0095	Initiating a data stream between any two XMPP entities.
SI File Transfer	XEP-0096	Transfer files between two users over XMPP.
Entity Capabilities	XEP-0115	Broadcasting and dynamic discovery of entity capabilities.
Data Forms Validation	XEP-0122	Enables an application to specify additional validation guidelines .
Service Administration	XEP-0133	Recommended best practices for service-level administration of servers and components using Ad-Hoc Commands.
Stream Compression	XEP-0138	Support for optional compression of the XMPP stream.
Data Forms Layout	XEP-0141	Enables an application to specify form layouts.
Personal Eventing Protocol	XEP-0163	Using the XMPP publish-subscribe protocol to broadcast state change events associated with an XMPP account.
Message Delivery Receipts	XEP-0184	Extension for message delivery receipts. The sender can request notification that the message has been delivered.
Blocking Command	XEP-0191	Communications blocking that is intended to be simpler than privacy lists (XEP-0016).
XMPP Ping	XEP-0199	Sending application-level pings over XML streams.
Entity Time	XEP-0202	Allows entities to communicate their local time
Delayed Delivery	XEP-0203	Extension for communicating the fact that an XML stanza has been delivered with a delay.
XMPP Over BOSH	XEP-0206	Use Bidirectional-streams Over Synchronous HTTP (BOSH) to transport XMPP stanzas.
Attention	XEP-0224	Getting attention of another user.
Bits of Binary	XEP-0231	Including or referring to small bits of binary data in an XML stanza.
Best Practices for Resource Locking	XEP-0296	Specifies best practices to be followed by Jabber/XMPP clients about when to lock into, and unlock away from, resources.
Last Message Correction	XEP-0308	Provides a method for indicating that a message is a correction of the last sent message.
Group Chat Invitations	n/a	Send invitations to other users to join a group chat room.
Jive Properties	n/a	TODO

Experimental Smack Extensions and currently supported XEPs of smack-experimental

Name	XEP	Description
Message Carbons	XEP-0280	Keep all IM clients for a user engaged in a conversation, by carbon-copy outbound messages to all interested resources.
Message Archive Management	XEP-0313	Query and control an archive of messages stored on a server.
Internet of Things - Sensor Data	XEP-0323	Sensor data interchange over XMPP.
Internet of Things - Provisioning	XEP-0324	Provisioning, access rights and user priviliges for the Internet of Things.
Internet of Things - Control	XEP-0325	Describes how to control devices or actuators in an XMPP-based sensor netowrk.
HTTP over XMPP transport	XEP-0332	Allows to transport HTTP communication over XMPP peer-to-peer networks.
Chat Markers	XEP-0333	A solution of marking the last received, displayed and acknowledged message in a chat.
Message Processing Hints	XEP-0334	Hints to entities routing or receiving a message.
JSON Containers	XEP-0335	Encapsulation of JSON data within XMPP Stanzas.
Internet of Things - Discovery	XEP-0347	Describes how Things can be installed and discovered by their owners.
Client State Indication	XEP-0352	A way for the client to indicate its active/inactive state.
Push Notifications	XEP-0357	Defines a way to manage push notifications from an XMPP Server.
HTTP File Upload	XEP-0363	Protocol to request permissions to upload a file to an HTTP server and get a shareable URL.
Multi-User Chat Light	XEP-xxxx	Multi-User Chats for mobile XMPP applications and specific enviroment.
OMEMO Multi End Message and Object Encryption	XEP-XXXX	Encrypt messages using OMEMO encryption (currently only with smack-omemo-signal -> GPLv3).
Google GCM JSON payload	n/a	Semantically the same as XEP-0335: JSON Containers

Legacy Smack Extensions and currently supported XEPs of smack-legacy

If a XEP becomes 'Deprecated' or 'Obsolete' the code will be moved to the smack-legacy subproject.

Name	XEP	Description
Message Events	XEP-0022	Requests and responds to message events.
Roster Item Exchange	XEP-0093	Allows roster data to be shared between users.