[asterisk-dev] Re: Read custom SIP header from Manager API?

[Ast Exp]

On 3/22/07, Tony Mountifield <tony at softins.clara.co.uk> wrote:
> In article <46025C64.4030901 at tedsoft.de>,
> Sven Jacobs <jacobs at tedsoft.de> wrote:
> > Dear Asterisk developers,
> >
> > I'm currently writing an application which displays incoming calls in a
> > popup window. The application connects to an Asterisk 1.4 server via the
> > Manager API and listens for dial events.
> >
> > On the Asterisk side I want to enrich the SI protocol with an additional
> > custom header which contains, for example, the extension which has been
> > dialed by using the SIPAddHeader() command in the dial plan.
> >
> > The client application should display the following information on an
> > incoming call:
> >
> > From: <CALLERID(name)>
> > Number: <CALLERID(num)>
> > To: <X-CUSTOMHEADER(extension)>
> > Date: <NOW>
> >
> > The question is whether it's possible to extract custom headers from the
> > Manager API? The dial event does not contain such information.
>
> Look at the UserEvent dialplan application, e.g.
>
> exten => _X.,n,UserEvent(SIP|SIPHdr: ${YOURSIPHEADER})
>
> You would probably put this just before your Dial() statement.
>
> Then you could watch for this event over the AMI and store the header
> against the channel.
>
> Hope this helps.
>
> Cheers
> Tony
> --
> Tony Mountifield
> Work: tony at softins.co.uk - http://www.softins.co.uk
> Play: tony at mountifield.org - http://tony.mountifield.org

Could this be used to extract the service identifier IE from an IAX
channel? Something like

exten => _X.,n,UserEvent(IAX|IAXHdr: ${IAX_IE_SERVICEIDENT})