SIP Features Module

This module implements the following SIP methods:

• SUBSCRIBE - Allow SIP clients to subscribe to specific events
• NOTIFY - Notify SIP clients when an event's state changed

Message handlers

• sip.subscribe Used to generate a resource.subscribe message
• resource.notify Used to generate a xsip.generate message with method=NOTIFY

Configuration file

sipfeatures.conf contains sections:

Section [general]

• expires_min: int: Minimum allowed expiring time in seconds. Defaults to 60
• expires_def: int: Default expiring time if not present in requests. Defaults to 600
• expires_max: int: Value used to limit the expiring time to something sane. Defaults to 3600
• forcedialogdata: boolean: Force (fill if missing) some parameters (dialog.callid, dialog.localtag, dialog.remotetag, dialog.remoteuri) in dialog state notification if made for a valid dialog (dialog.id is not empty). Defaults to enable.

Section [allow_events]

Restrict/allow subscriptions to individual events. If an event is disabled, no subscriptions to it will be allowed

• default: boolean: Default value if an event is not listed here. Defaults to enable
• dialog: boolean: Enable/disable subscriptions to dialog state events. Defaults to enable
• message-summary: boolean: Enable/disable subscriptions to message waiting events. Defaults to enable

subscription.conf.