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SipFeatures » History » Version 162

Adrian Georgescu, 07/11/2013 11:42 AM

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h1. Features
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_SIP SIMPLE client SDK_ is a Software Development Kit for development of Real Time Applications based on SIP and related protocols for Audio, Instant Messaging, File Transfers, Desktop Sharing and Presence. Other media types can be easily added by using an extensible high-level API.
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The library has cross platform capabilities on Linux OS, Mac OSX and Microsoft Windows. The library should work with minimal changes on any platform that supports C and Python development environments. The SIP and media stacks are based on pjsip 1.0 version with relevant patches from later versions applied.
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To see _SIP SIMPLE client SDK_ features in action you can try "Blink":http://icanblink.com or "SylkServer":http://sylkserver.com
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h2. General
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 * Multiple SIP Accounts support
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 * Non-blocking, asynchronous, notifications based engine
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 * Configuration Framework
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 * TLS Security for SIP signaling (SIP)
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 * TLS Security for media (MSRP, XCAP)
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 * Multiple Media Types per Session (e.g. Audio + IM)
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 * Trace capability for all underlying protocols
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 * Supports re-INVITE for adding and removing media
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 * Automatically handling if IP Address changes
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 * Conference Audio Mixer
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 * Wav Player and Recorder
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 * Acoustic Echo Cancelation
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 * Answering Machine
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h2. Codecs
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 * Ultra-wideband: OPUS 48kHz, Speex 32kHz
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 * Wideband: Speex and G722
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 * Narrowband: G711, iLBC, GSM
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h2. Supported media types:
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 * Audio (RTP and sRTP)
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 * Instant Messaging (MSRP)
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 * File Transfer (MSRP)
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 * Screen Sharing (VNC over MSRP)
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All media types can be combined together in the same SIP session.
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The library uses a separated from the core lookup mechanism for the next hop routing. This important feature allows the library to be used for building SIP clients that operate in combination with any SIP provider (by employing RFC 3263 DNS lookups), in a server-less LAN operation (using Bonjour protocol) or integrated into a network overlay developed by a third party (e.g. P2PSIP overlay).
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h2. Implemented Standards
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h3. SIP Signaling
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* SIP, Session Initiation Protocol "RFC3261":http://tools.ietf.org/html/rfc3261 
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* SDP, Session Description Protocol "RFC4566":http://tools.ietf.org/html/rfc4566 
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* An Offer/Answer Model with Session Description Protocol (SDP) "RFC3264":http://tools.ietf.org/html/rfc3264 
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* Reliability of Provisional Responses in Session Initiation Protocol "RFC3262":http://tools.ietf.org/html/rfc3262
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* HTTP Authentication: Basic and Digest Access Authentication "RFC2617":http://tools.ietf.org/html/rfc2617
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* The Reason Header Field for the Session Initiation Protocol "RFC3326":http://tools.ietf.org/html/rfc3326
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* The Session Initiation Protocol (SIP) Refer Method "RFC3515":http://tools.ietf.org/html/rfc3515
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* The Session Initiation Protocol (SIP) "Replaces" Header "RFC 3891":http://tools.ietf.org/html/rfc3891
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* Session Initiation Protocol (SIP) Call Control - Transfer "RFC 5589":http://tools.ietf.org/html/rfc5589
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* Obtaining and Using Globally Routable User Agent URIs (GRUUs) "RFC 5627":http://tools.ietf.org/html/rfc5627
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h3. Address Resolution
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* Locating SIP services: "RFC3263":http://tools.ietf.org/html/rfc3263
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* Bonjour multicast DNS: http://tools.ietf.org/html/draft-lee-sip-dns-sd-uri-03
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h3. NAT Traversal
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* SIP Signaling: Symmetric Response Routing Symmetric media "RFC3581":http://tools.ietf.org/html/rfc3581
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* STUN: Session Traversal Utilities for NAT "RFC3489":http://tools.ietf.org/html/rfc3489
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* RTP media (Audio and Video): ICE, Interactive Connectivity Establishment "RFC5245":http://tools.ietf.org/html/rfc5245
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* MSRP media (Instant Messaging and File Transfer): MSRP protocol relay extension "RFC4976":http://tools.ietf.org/html/rfc4976
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* MSRP Alternative Connection Model (ACM)  "RFC6135":http://tools.ietf.org/html/rfc6135
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h3. Voice over IP
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* RTP, A Transport Protocol for Real-Time Applications "RFC3550":http://tools.ietf.org/html/rfc3550
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* Real Time Control Protocol (RTCP) attribute in Session Description Protocol (SDP) "RFC3605":http://tools.ietf.org/html/rfc3605
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* The Secure Real-time Transport Protocol (SRTP)  "RFC3711":http://tools.ietf.org/html/rfc3711
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* Generation and parsing of RFC 2833/telephone-events payload in both RTP and SDP "RFC2833":http://tools.ietf.org/html/rfc2833
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h3. Instant Messaging
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* Common Presence and Instant Messaging (CPIM): "RFC 3862":http://tools.ietf.org/html/rfc3862
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* Session Initiation Protocol (SIP) Extension for Instant Messaging  "RFC3428":http://tools.ietf.org/html/rfc3428
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* MSRP Protocol "RFC4975":http://tools.ietf.org/html/rfc4975
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* Indication of Message Composition for Instant Messaging "RFC3994":http://tools.ietf.org/html/rfc3994
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* Message Summary Event Package "RFC3842":http://tools.ietf.org/html/rfc3842
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* File Transfer "RFC5547":http://tools.ietf.org/html/rfc5547
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h3. Desktop Sharing
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* Variation of "draft-garcia-mmusic-sdp-collaboration-00":http://tools.ietf.org/html/draft-garcia-mmusic-sdp-collaboration-00 using RFB over MSRP
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h3. Conferencing
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* Conference Event Package "RFC4575":http://tools.ietf.org/html/rfc4575
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* A Framework for Conferencing with the Session Initiation Protocol "RFC4353":http://tools.ietf.org/html/rfc4353
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* SIP Call Control - Conferencing for User Agents "RFC4579":http://tools.ietf.org/html/rfc4579
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* MSRP ad-hoc multi-party chat sessions "draft-ietf-simple-chat":http://tools.ietf.org/html/draft-ietf-simple-chat-15
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h3. Presence
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* SIP Specific Event Notification (SUBSCRIBE and NOTIFY methods) "RFC3265":http://tools.ietf.org/html/rfc3265
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* SIP Extension for Event State Publication (PUBLISH method) "RFC3903":http://tools.ietf.org/html/rfc3903     
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* SIP Event Notification Extension for Resource Lists Contact Information Extension to PIDF "RFC4482":http://tools.ietf.org/html/rfc4662
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* Presence Data Model (PIDF) "RFC3863":http://tools.ietf.org/html/rfc3863, "RFC3379":http://tools.ietf.org/html/rfc3379, "RFC4479":http://tools.ietf.org/html/rfc4479
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* Watcher-info Event Package "RFC3857":http://tools.ietf.org/html/rfc3857, "RFC3858":http://tools.ietf.org/html/rfc3858
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* Rich Presence Extensions to PIDF "RFC4480":http://tools.ietf.org/html/rfc4480
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* Contact Information Extension to PIDF "RFC4482":http://tools.ietf.org/html/rfc4482
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* User Agent Capability Extension to PIDF "RFC5196":http://tools.ietf.org/html/rfc5196 
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* XCAP Protocol "RFC4825":http://www.tools.ietf.org/html/rfc4825
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* Common Policy "RFC4745":http://www.tools.ietf.org/html/rfc4745  
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* Presence Rules "RFC5025":http://www.tools.ietf.org/html/rfc5025
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* Resource Lists "RFC4826":http://www.tools.ietf.org/html/rfc4826
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* RLS Services "RFC4826":http://www.tools.ietf.org/html/rfc4826
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* RLMI document handling "RFC4662":http://www.tools.ietf.org/html/rfc4662
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* PIDF manipulation "RFC4827":http://www.tools.ietf.org/html/rfc4827
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* XCAP Diff "RFC5874":http://tools.ietf.org/html/rfc5874
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* OMA Reference Release Definition for XDM v1.1 and Presence SIMPLE v1.1 "Implementation Guidelines":http://www.openmobilealliance.org/Technical/release_program/docs/CopyrightClick.aspx?pck=XDM_PRS_IMPL&file=V1_0-20081209-A/OMA-RRELD-XDM_PRS_IMPL-V1_0-20081209-A.pdf
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* OMA XML "Document Management V1.1":http://www.openmobilealliance.org/technical/release_program/xdm_v1_1.aspx