[Freeswitch-dev] Channel variables from openzap

Fri Oct 3 09:20:15 EDT 2008

var event is switch_event_t, there are many iteration examples in the code.

It's just a linked list.

for (h = var_event->headers; h; h = h->next) {
   printf("%s=%s\n", h->name, h->value);
}

On Fri, Oct 3, 2008 at 1:00 AM, Simon Capper <scapper at ooma.com> wrote:

> Is there a way to iterate var_event or do I need to add one?
>
>
> Simon
>
>
> On 10/2/08 11:52 AM, "Anthony Minessale" <anthony.minessale at gmail.com>
> wrote:
>
> > use a hash to store the vars.
> > we have a hashtable you can see being used in zap_io.c
> >
> >
> >
> > On Thu, Oct 2, 2008 at 1:21 PM, Simon Capper <scapper at ooma.com> wrote:
> >
> >> I see how the var_event mechanism works.
> >>
> >> Are you ok with new openzap functions to set/get the vars on the
> channel,
> >> called from outgoing_channel().
> >>
> >> zap_channel_add_var(zap_channel_t *zchan, char *var_name, const char
> >> *value)
> >>
> >> const char * zap_channel_get_var(zap_channel_t *zchan, char *var_name)
> >>
> >> And new fields in zap_channel struct to hold the data
> >> char * user_vars[];
> >> int num_user_vars
> >>
> >>
> >> Simon
> >>
> >>
> >> On 10/2/08 10:18 AM, "Anthony Minessale" <anthony.minessale at gmail.com>
> >> wrote:
> >>
> >>> The difference openzp is itself also an abstraction layer so you need
> to
> >>> pass it down.
> >>>
> >>> I *will not* violate scope like that.....
> >>>
> >>> so the only thing I am ok with is adding channel variables to the
> openzap
> >>> channels.
> >>> Then you can either set them all from the vars_event in the mod_openzap
> >>> outgoing_channel routine
> >>> or with a callback via the core set_variable mechanism.
> >>>
> >>> Then your signaling mod could get the variables by name when it was
> >> needed.
> >>>
> >>> you will learn to understand that due to the years of torture from
> >> asterisk
> >>> and it's knotted up api that is somehow called an abstraction layer, I
> >> will
> >>> not bend on scope issues. Things like this are exactly what went wrong
> >>> there.
> >>>
> >>>
> >>>
> >>>
> >>>
> >>> On Thu, Oct 2, 2008 at 11:04 AM, Simon Capper <scapper at ooma.com>
> wrote:
> >>>
> >>>> The variables would be set before the call by another app, its
> analogous
> >> to
> >>>> setting a sip_x variable and having it appear in the sip signaling,
> >> don't
> >>>> need a callback.
> >>>>
> >>>> The parameters are (so far):
> >>>> Ring type: (cadences index to ring the phone with)
> >>>> Phones to ring list: (proprietary for my ozmod module, don't think it
> >>>> should
> >>>> be in the library)
> >>>>
> >>>> Maybe have a variable  "opanzap_<variable_name>" that mod_openzap
> looks
> >> for
> >>>> and adds to the zchan structure by passing a custom variable array to
> >>>> zap_channel_open() then the ozmod can read it.
> >>>>
> >>>> Simon
> >>>>
> >>>>
> >>>> On 10/2/08 6:11 AM, "Anthony Minessale" <anthony.minessale at gmail.com>
> >>>> wrote:
> >>>>
> >>>>> That would pretty much violate the whole scope of the library.  It's
> >> not
> >>>>> supposed to even know there is a such thing as FreeSWITCH to get
> >>>> variables
> >>>>> from.  There could just as easily be a chan_openzap for asterisk
> >> (*WINK*
> >>>>> *WINK* anyone? buelleur?)
> >>>>>
> >>>>> What exactly do you need them for?
> >>>>>
> >>>>> The most elegant way would be for the FS core to allow endpoints
> >>>>> (mod_openzap) to register a callback to be called
> >>>>> when a variable is set on that channel, then add the concept of
> channel
> >>>>> variables to openzap zchans
> >>>>>
> >>>>> so then when FS had a channel variable set it mod_openzap would in
> turn
> >>>> set
> >>>>> it on openzap zchan and the blind abstraction would be preserved.
> >>>>>
> >>>>>
> >>>>>
> >>>>>
> >>>>> On Thu, Oct 2, 2008 at 2:42 AM, Simon Capper <scapper at ooma.com>
> wrote:
> >>>>>
> >>>>>> I want to access channel variables from an ozmod module in openzap.
> >>>>>> I can't see a way to do it in the current code.
> >>>>>>
> >>>>>> I'd like to add the feature and provide a patch for openzap when I'm
> >>>> done.
> >>>>>> I'm thinking of adding a void pointer that could be passed down via
> >>>>>> zap_channel_open that could be then be used from the ozmod modules?
> >>>>>> Mod_openzap would set the pointer to a function that would give
> access
> >>>> to
> >>>>>> channel variables. Thoughts?
> >>>>>>
> >>>>>> Simon
> >>>>>>
> >>>>>>
> >>>>>>
> >>>>>> _______________________________________________
> >>>>>> Freeswitch-dev mailing list
> >>>>>> Freeswitch-dev at lists.freeswitch.org
> >>>>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
> >>>>>> UNSUBSCRIBE:
> >> http://lists.freeswitch.org/mailman/options/freeswitch-dev
> >>>>>> http://www.freeswitch.org
> >>>>>>
> >>>>>
> >>>>>
> >>>>
> >>>>
> >>>>
> >>>> _______________________________________________
> >>>> Freeswitch-dev mailing list
> >>>> Freeswitch-dev at lists.freeswitch.org
> >>>> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
> >>>> UNSUBSCRIBE:
> http://lists.freeswitch.org/mailman/options/freeswitch-dev
> >>>> http://www.freeswitch.org
> >>>>
> >>>
> >>>
> >>
> >>
> >>
> >> _______________________________________________
> >> Freeswitch-dev mailing list
> >> Freeswitch-dev at lists.freeswitch.org
> >> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
> >> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
> >> http://www.freeswitch.org
> >>
> >
> >
>
>
>
> _______________________________________________
> Freeswitch-dev mailing list
> Freeswitch-dev at lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-dev
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-dev
> http://www.freeswitch.org
>

-- 
Anthony Minessale II

FreeSWITCH http://www.freeswitch.org/
ClueCon http://www.cluecon.com/

AIM: anthm
MSN:anthony_minessale at hotmail.com <MSN%3Aanthony_minessale at hotmail.com>
GTALK/JABBER/PAYPAL:anthony.minessale at gmail.com<PAYPAL%3Aanthony.minessale at gmail.com>
IRC: irc.freenode.net #freeswitch

FreeSWITCH Developer Conference
sip:888 at conference.freeswitch.org <sip%3A888 at conference.freeswitch.org>
iax:guest at conference.freeswitch.org/888
googletalk:conf+888 at conference.freeswitch.org<googletalk%3Aconf%2B888 at conference.freeswitch.org>
pstn:213-799-1400
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.freeswitch.org/pipermail/freeswitch-dev/attachments/20081003/8b7a3194/attachment.html 