[Freeswitch-users] mod_xml_curl - missing dialplan variable (domain of originating user for blind transfer)

[Cal Leeming [Simplicity Media Ltd]]

Not sure if this is relevant but thought I'd point it out.

The following field seems to contain the IP of the domain we were expecting
('c1881.voiceflare.co.uk')

 u'variable_sip_from_host': u'89.238.182.137',

Normally, this field would contain the hostname and not the IP.

Cal

On Mon, Nov 19, 2012 at 4:34 AM, Cal Leeming [Simplicity Media Ltd] <
cal.leeming at simplicitymedialtd.co.uk> wrote:

> Hi guys,
>
> In a nut shell, it appears that when attempting to perform a blind
> transfer under certain conditions (explained below), mod_xml_curl does not
> expose the originating domain in a clean format.
>
> My initial plan was to find the point where these variable were being
> generated, look at what was available, then add an extra variable for the
> domain and submit a patch.
>
> Sadly my C isn't great and I hit a brick wall, so if anyone can help out,
> I will ensure the mod_xml_curl documentation is updated and/or assist with
> any patching/testing required.
>
> Please take the following scenario;
>
> * Extension 2000 calls an external number via a gateway (i.e. bridge
> sofia/gateway/name/e164_number_here).
> * Call connects fine, audio stays good, no disconnection problems etc.
> * Call is blind transferred to another extension
>
> As a result, the following is determined;
>
> * User initiating the blind transfer is 2000
> * Domain initiating the blind transfer is c1881.voiceflare.co.uk
> * Destination number of the call is 447866123456
> * Number to blind transfer to is 2001
> * Call to mod_xml_curl is made
>
> It makes reference to the User in the following 'clean' variables (by
> clean, I mean variables that just contain 2000 and don't require mangling
> to extract the info);
>
>  u'Caller-ANI': u'2000',
>  u'Caller-Username': u'2000',
>  u'Caller-Caller-ID-Number': u'2000',
>  u'Hunt-ANI': u'2000',
>  u'Hunt-Caller-ID-Number': u'2000',
>  u'Hunt-Username': u'2000',
>  u'variable_last_sent_callee_id_number': u'2000',
>  u'variable_sip_from_user': u'2000',
>
> It also has the User in the following unclean variables;
>
>  u'variable_bridge_channel': u'sofia/external/
> 2000 at c1881.voiceflare.co.uk:5060',
>  u'variable_sip_from_uri': u'2000 at 89.238.182.137',
>  u'variable_sip_full_from': u'"foxx" <sip:2000 at 89.238.182.137
> >;tag=XryjFQp3rB2NF',
>  u'variable_sip_h_Referred-By': u'"foxx" <
> sip:2000 at c1881.voiceflare.co.uk:5060>',
>
> However, it only references the domain in the following unclean variables;
>
>  u'variable_bridge_channel': u'sofia/external/
> 2000 at c1881.voiceflare.co.uk:5060',
>  u'variable_sip_h_Referred-By': u'"foxx" <
> sip:2000 at c1881.voiceflare.co.uk:5060>',
>  u'variable_sip_refer_to': u'<sip:2001 at c1881.voiceflare.co.uk:5060>',
>
> Lets say that we want to determine the user/domain that has initiated this
> transfer, doing so would mean mangling with one of those above variables,
> which seems a bit dirty (plus it is not clear which is the correct one to
> use).
>
> I have attached the SIP trace of the entire blind transfer event, and the
> full mod_xml_curl request being sent.
>
> If anyone could answer the following, it'd be much appreciated;
>
> * Should there be an improvement patch that exposes the domain of the user
> that originated the blind transfer?
> * Are there better/alternative ways to extracting the domain of the user
> that originated the blind transfer?
>
> Many thanks
>
> Cal
>
>
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