SIP Features Module

This page describes the SIP features module.

Implemented SIP Methods

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

To enable the subscribe method set:

ysipchan.conf

[methods]
subscribe=yes

To configure the logic of how to handle the subscriptions and the notifications use subscription.conf file.

Message handlers

Internally Yate will handle the following messages:

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

Allowed events

Use section [allow_events] to restrict/allow subscriptions to individual events. If an event is disabled, no subscriptions to it will be allowed. The supported events are: dialog and message-summary.

• 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

Configuration file

Configuration file sipfeatures.conf

; This file configures the SIP feature module

[general]
 
; expires_min: int: Minimum allowed expiring time in seconds
;expires_min=60
 
; expires_def: int: Default expiring time if not present in requests
;expires_def=600
 
; expires_max: int: Value used to limit the expiring time to something sane
;expires_max=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
;forcedialogdata=enable

; verbosexml: boolean: Build verbose XML bodies (add line breaks and spaces)
; A dialog XML notification body will spare about 38 chars if this option is disabled
; Defaults to enable
;verbosexml=enable

[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
;default=enable

; dialog: boolean: Enable/disable subscriptions to dialog state events
;dialog=enable

; dialog: boolean: Enable/disable subscriptions to message waiting events
;message-summary=enable

See also

• SIP Configuration File
• SIP Routing in Yate