[asterisk-users] some questions about atxfer usage

[Alberto Pastore]

Antonio Almodóvar ha scritto:
> Hi all.
>
> I have enabled the attended transfer feature in features.conf. I'm
> using it and I want to resolve some questions, I hope someone can help
> me :)
>
> When I transfer a call to an extension:
> - The extension rings during 15 seconds and the call returns to the
> "transferer". Is there any possibility to recover the call before the
> timeout of 15 seconds expires?
>
> I mean, I would like to personalize the way of making transfers using
> the feature of atxfer. How can I do that?
>
>
> Thanks in advance.
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Hi Antonio.

Taking a look at the following code line from res_features.c:

newchan = ast_feature_request_and_dial(transferer,
    "Local",
    ast_best_codec(transferer->nativeformats),
    dialstr,
    15000,          // <-------------------!!!!
    &outstate,
    cid_num,
    cid_name);

I assume that 15000 msecs is a hardcoded value...
You might want to replace it with some variable taken from 
pbx_builtin_getvar_helper() results
but it involves recompiling at least the res_features.c module; 
something more or less
like this (I haven't tested it!!!):

//these two lines go at the beginning of the if {} block
char *transfer_timeout_str;
int transfer_timeout = 15; //default value

//these lines replace the newchan = ast_feature_request_and_dial(...) one
//read the value (if any) from TRANSFER_TIMEOUT
//can be set in extensions.conf's [globals] (TRANSFER_TIMEOUT => 30)
transfer_timeout_str = pbx_builtin_getvar_helper(transferer, 
"TRANSFER_TIMEOUT");
if (transfer_timeout_str) {
    transfer_timeout = atoi(transfer_timeout_str);
    //sanity check
    if (transfer_timeout <= 0) transfer_timeout = 15;
}
newchan = ast_feature_request_and_dial(transferer,
    "Local",
    ast_best_codec(transferer->nativeformats),
    dialstr,
    transfer_timeout * 1000,          // <-------------------!!!!
    &outstate,
    cid_num,
    cid_name);

Bye,
Alberto.

-- 
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Alberto Pastore
B-Press Srl - Gruppo MSoft
P.IVA 01697420030
P.le Lombardia, 4 - 28100 Novara - Italy
Tel. 0321-499508 
Fax 0321-492974
http://www.msoft.it