SIP SIMPLE Client SDK

h1. SIP SIMPLE Payloads API

These applications provide functionality that are required for implementing a feature-rich SIP SIMPLE client.

These applications are used for parsing and generating bodies carried using PUBLISH, SUBSCRIBE and NOTIFY methods designed for asynchronous event notifications, to convey in near real-time, information between SIP end-points.

An example of such information is presence, which in its basic form it provides user availability information based on end-user choice.  In its advanced form, presence can provide rich state information including but not limited to user mood, geo-location, environment, noise level and the type of communication desired.  The information can be disseminated based on a granular policy which allows end-users to decide who has access to which part of the published information.

h2. Watcher Info 

Described in RFC3857 and RFC3858.

source:sipsimple/payloads/watcherinfo.py 

Parses NOTIFY body for presence.winfo event. Used for keeping track of watchers that subscribed to our presentity.  Based on this information the the user can manage its presence policy.  To retrieve this information the SIP client must subscribe to its own address for event presence.winfo.

h2. Resource Lists

Described in RFC4826.

source:sipsimple/payloads/resourcelists.py

Parses and generates XML documents for constructing resource lists documents.  Used for server side storage of presence related buddy lists using XCAP protocol.  The SIP clients maintain the resource-lists on the XCAP server which provides persisten storage and aggregation point for multiple devices.

h2. RLS Services

Described in RFC4826.

source:sipsimple/payloads/rlsservices.py

Parses and generates XML documents for constructing rls-services documents.  Used for delegating presence related works to the server.  The client build rls-services lists with buddies and instructs the server to subscribe to the sip uris indicated in the lists.  This way the client can save bandwidth as the server performs the signalling for subscription and collection of notifications and provides consolidated answer to the sip user agent.

h2. RLS Notifications

 * source:sipsimple/payloads/rlmi.py

 * source:sipsimple/payloads/rlsnotify.py 

Described in RFC4482

Document handling for NOTIFY body for Resource Lists Contact Information.

h2. Policy

Described in RFC4745

source:sipsimple/payloads/policy.py

Generic data types to be used in policy applications.

h2. Presence Rules

Described in RFC5025.

source:sipsimple/payloads/presrules.py

Parses and generates authorization rules in XML format for presence or other applications.  Authorization rules are stored on the XCAP server.  The presence rules are generated either based on user initiative or as a response to a new subscription signaled by a change in the watcherinfo application.

h2. OMA Policy

source:sipsimple/payloads/omapolicy.py

Described in OMA-TS-Presence_SIMPLE_XDM-V1_1

Conditions extension handling according to OMA-TS-Presence_SIMPLE_XDM-V1_1.  This module provides an extension to common policy defined in RFC4745 to support condition extensions defined by OMA.

h2. Presence Content

source:sipsimple/payloads/prescontent.py

Described in OMA-TS-Presence_SIMPLE_XDM-V1_1

Generates presence content application documents according to OMA TS

Presence SIMPLE Content.

h2. XCAP Directory

source:sipsimple/payloads/directory.py (OMA Core Specifications)

Parses xcap-directory messages according to OMA TS XDM Core.

source:sipsimple/payloads/dialoginfo.py

Described in RFC4235.

Parses and produces dialog-info messages according to RFC4235.

h2. Dialog Rules

source:sipsimple/payloads/dialogrules.py

Parses and produces Dialog Authorization Rules documents. As there is no RFC for this, common-policy format from RFC 4745 is used.  Subscription Handling has been taken from RFC 5025.

h2. PIDF

source:sipsimple/payloads/pidf.py

Described in RFC3863 and RFC3379.

This module provides classes to parse and generate PIDF documents, and also uses the XML Application extensibility API to allow extensions to PIDF. It is used to parse NOTIFY body for presence event and generates rich presence state information for use with PUBLISH. Used to generate own presence information and to parse the state of buddy lists entries we have subscribed to. A SIP client typically instantiates a new pidf object for itself and for each buddy it SUBSCRIBEs to and update each object when a NOTIFY is received. The list of buddys is maintained using resourcelists application.

h2. RPIDF

source:sipsimple/payloads/rpid.py

Described in RFC4480.

This module provides an extension to PIDF to support rich presence.

h2. Presence Data Model

source:sipsimple/payloads/presdm.py.

Described in RFC4479.

This module provides an extension to the PIDF to support the data module defined in RFC4479.

h2. CIPID

source:sipsimple/payloads/cipid.py

Described in RFC4482.

This module provides an extension to PIDF to provide person related information.

h2. Endpoint Capabilities

source:sipsimple/payloads/caps.py

Described in RFC5196.

This module provides capabilities application: displays OPTIONS request-like information as an extension to the PIDF.

h2. XCAP capabilities

source:sipsimple/payloads/xcapcaps.py

Described in RFC4825.

Support for parsing and building xcap-caps documents, as defined by RFC4825.

h2. XCAP Differences

source:sipsimple/payloads/xcapdiff.py

Described in RFC5874.

Parses NOTIFY body for xcap-diff event. Used to detect changes in XCAP documents changed by other device configured for the same presentity.

h2. Is-composing

source:sipsimple/payloads/iscomposing.py

Described in RFC3994.

This module parses and generates isComposing messages according to RFC3994. It's used mainly in chat environments to indicate the other party that the user is actually typing a message.

h2. Conference Information

source:sipsimple/payloads/conference.py

Described in RFC4575.

This module implements conference-info payload parsing and generating for describing information about conference participants and related resources.

h2. Message Summary

source:sipsimple/payloads/messagesummary.py

Described in RFC3842.

This module implements a parser and generator for message-summary payload, which is used to indicate missed calls or voice mail recordings.