[asterisk-dev] chan_zap questions

[Klaus Darilion]

Armin Schindler wrote:
> On Wed, 12 Jul 2006, Klaus Darilion wrote:
>> Armin Schindler wrote:
>>> On Tue, 11 Jul 2006, Kevin P. Fleming wrote:
>>>> ----- Armin Schindler <armin at melware.de> wrote:
>>>>> I think a defined indication via ast_indicate() (which is
>>>>> forwarded by
>>>>> Asterisk even in app_dial()) would be more appropriate.
>>>> We've already added the ability to queue control frames (which are
>>>> delivered by ast_indicate()) that carry a payload, which was done
>>>> specifically for this purpose.
>>> Yes, I noticed the additional Parameter to the indicate function.
>>> That's why I mentioned this. It's a better way than doing it via the
>>> bridge.
>>>
>>> Klaus, what is the reason for using the bridge instead of indicate?
>> Probably it is lack of Asterisk know-how. ast_indicate_data looks promising -
>> but I still do not know how to get the reference to the other call leg.
>>
>>
>> Caller          Asterisk            Callee
>> leg 1                 leg2
>> <-------FACILITY---
>>
>>
>> Currently, if there is an incoming FACILITY message, the facility event is
>> sent to chan_zap, which gets the AOC-D units from the event structure. But to
>> forward it on call leg 1 I need to get a reference to the ast_cannel of leg 1.
>> How do I get this?
> 
> I don't think you need to know the other leg.
> Just pass a CONTROL FRAME to Asterisk.
> It seems that currently these CONTROL frames are supported for
> additional data:
>  AST_CONTROL_HOLD
>  AST_CONTROL_UNHOLD
>  AST_CONTROL_VIDUPDATE
> 
> Maybe an additional subclass
>  AST_CONTROL_AOC
> should be introduced.

Thats what I did and it works fine. But ast_indicate_data requires a 
ast_channel as first parameter. If FACILITY is received on leg2, I have 
to find out the ast_channel of leg 1 to indicate on the proper channel. 
Fur this purpose I still use ast_bridged_call. Any other suggestion?


during processing of case PRI_EVENT_FACNAME:
   struct ast_channel *otherchan;
   otherchan = ast_bridged_channel(pri->pvts[chanpos]->owner);
   if (otherchan && (!strcmp(otherchan->tech->type, "Zap"))) {
     /* Only for Zap channels */
     ast_indicate_data(otherchan, AST_CONTROL_AOCD, &aocd,
                       sizeof(struct aocd_data));
     ...


regards
klaus


> 
> Armin
> 
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