HP-UX C SIP Stack Programmer's Guide (Novembery 2007)

Event Notification 267

Support for Subscription Forking

SUBSCRIPTION

ORKING CALL FLOW

The following call flows illustrate three types of subscription forking.

Figure 12-10 illustrates subscription forking that is enabled in the SIP Stack and

in the original subscription.

Figure 12-10 Subscription Forking in SIP Stack and Original

Subscription

Network

Stack

User

Create Forked Subscription with

hidden dialog. Set Subscription

State to 2XX_RCVD

RvSipSubsCreatedDueToForkingEv()

NOTIFY

(From tag does not match)

Prepare Expires value:

1. Get Expires from SUBSCRIBE request

2. If Expires is undefined, get Expires from

NOTIFY request.

Set NoNotify timer

Set Alert timer to Expires (only if

NOTIFY has no "Expires"

Create Notification

Object

for the Forked

Subscription

Forking Code

Existing

Code

RvSipSubsNotifyCreatedEv()