产品家族

产品家族

产品

资源

SIP 协议特性

Juphoon SIP 的RFC顺从

RFC 3261	Session Initiation Protocol
RFC 3262	Reliability of Provisional Response
RFC 3263	Locating SIP Servers
RFC 3264	An Offer-Answer Model with Session Description
RFC 3265	Specific Event Notification
RFC 3311	The SIP UPDATE method
RFC 3313	Private SIP Extensions for Media Authorization
RFC 3323	A Private mechanism for the SIP
RFC 3325	Private Extensions to the SIP for Asserted Identity within Trusted Networks
RFC 3326	The Reason Header
RFC 3329	Security Mechanism Agreement for the SIP
RFC 3372	SIP for Telephones (SIP-T): Context and Architectures
RFC 3428	Session Initiation Protocol (SIP) Extension for Instant Messaging
RFC 3515	The REFER method RFC 2806 URLs for Telephone Calls
RFC 2806	URLs for Telephone Calls
RFC 2976	The SIP INFO Method
RFC 3204	MIME media types for ISUP and QSIG Objects
RFC 3581	An Extension to the SIP for Symmetric Response Routing
RFC 3841	Caller Preferences for the Session Initiation Protocol (SIP)
RFC 3891	The Session Initiation Protocol (SIP) "Replaces" Header
RFC 3892	The Session Initiation Protocol (SIP) Referred-By Mechanism
RFC 3903	Session Initiation Protocol (SIP) Extension for Event State Publication
RFC 3911	The Session Initiation Protocol (SIP) "Join" Header
RFC 3455	Private Header (P-Header) Extensions to the Session Initiation Protocol (SIP) for the 3GPP
RFC 3327	SIP Extension Header Field for Registering Non-Adjacent Contacts
RFC 3608	SIP Extension Header Field for Service Route Discovery During Registration
RFC 2368	The mailto URL scheme RFC 2327 Session Description Protocol
RFC 4028	Session Timers in the Session Initiation Protocol (SIP)

SIP 编解码

- 快速的一次扫描编解码 (手工编写的解析器)
- 超过86个header显式解析
- SIP, SIPS, TEL, IM, MAILTO, ABSO URI scheme支持
- 3GPP \ IMS 的SIP服务头域支持
- 安全机制头域
- MIME body 和 multi-bodies支持
- 完全精细解析或部分精细解析可配置
- 任何顺从 SIP ABNF语法定义的扩展头域解析支持
- SDP消息解析
- Sigcomp 支持

SIP 处理

- INVITE Client/Server 和 non-INVITE Client/Server transactions处理
- Early dialog, established dialog and multi dialog处理
- Dialog forking处理
- 自动完成头域消息处理
- 对于SIP消息的原语分类处理
- 每路会话 / 呼叫只占用约8K字节内存

SIP 传输

- UDP/TCP 传输
- SIP NAT地址转换

SIP 应用

- 支持多个上层应用实体
- 支持 User Agent, Proxy Server, Redirect Server, Registrar

Sipping服务

- Call Hold
- Consultation Hold
- Music On Hold
- Transfer - Unattended (subscribe/notify)
- Transfer - Attended (subscribe/notify)
- Transfer - Instant Messaging
- Call Forwarding Unconditional
- Call Forwarding - Busy
- Call Forwarding - No Answer
- 3-way Conference - Third Party is Added
- 3-way Conference - Third Party Joins
- Single Line Extension
- Fined - Me
- Call Management (Incoming Call Screening)
- Call Management (Outgoing Call Screening)
- Call Park
- Call Pickup, two (or more) parts can pick up each others' calls
- Automatic Redial
- Click to Dial
- ...

SIP 库

- Win32(VC6.0)
lsip.lib 1578k(include liblsip.a & libsip.a), zos.lib 551k, sdp.lib 173k, lrtp.lib 90k
- Linux(GCC 3.2.2)
liblsip.a 273k libsip.a 350k, libzos.a 273k, libsdp.a 66k, liblrtp.a 48k
- VxWorks(Cygnus 2.7.2 (GCC))
liblsip.a 286k libsip.a 432k libzos.a 295k libsdp.a 81k liblrtp.a 47k

关键技术

- 强大的资源统计、跟踪、日志记录和错误处理
- 高效的ABNF解析器
- 灵活的FSM（有限状态机）机制
- 资源 (Dbuf, session, dialog, transaction 等等) dump控制
- 稳定高效的数据缓冲区控制机制
- 线程安全机制，简单的内部通信机制
- 在不同应用场合下的计时器
- Garbage Bin技术
- 其他技术