ast_read() wrong for calls initiated by Asterisk

See http://bugs.
digium.com/view.php?id=11917 (it only talks about
AGI scripts, but it's more generic, it also happens with the
Read()
application in the dialplan)

The story so far:

- I have a call initiated by the Asterisk server with a call
file.
  That works.

- During the call I will ask for a couple of digits.

The dialplan is as follow (just FYI, this all works)

    [context-tools]
    exten => 123,1,NoOp(Callback1)
    exten => 123,n,Answer()
    exten => 123,n,Read(foo,one-moment-please,3,,,10);
    exten => 123,n,SayDigits($)
    exten => 123,n,AGI(callback1.agi)

    [context-callback]
    exten => _.X,1,NoOp(callback time)
    exten => _.X,n,Answer()
    exten => _.X,n,Read(foo,one-moment-please,3,n,,10);
    exten => _.X,n,SayDigits($);
    exten => _.X,n,Hangup

Now the strange thing is the Read() on 123 does recognize
the
DTMF keys, while the Read() in the callback does not
recognized the
DTMF keys.

Going through some code I ended up at main/channel.c at the
ast_waitfordigit_full() function which did do a ast_read().
For the
Read() on 123, the ast_read now and then showed a
AST_FRAME_DTMF_END.
But for the Read() in the callback it didn't show up.

At that moment I thought that this might be a
left-right-channel issue:

Under normal circumstances, the user telephone (the
originating
channel) calls the PABX. So the user data comes from
originating
channel to the channel and the Read() function gets the data
from
the originating channel.

But with call files, the user telephone is on the outgoing
channel
and thus should the Read() function get the data from the
outgoing
channel.


The question of course is.... Does this explanation make
sense?

(Oh, and where is the link between the DialPlan and the call
to the
Read() function? (Don't worry, I'll find it )


Edwin

-- 
Edwin Groothuis      |            Personal website: http://www.mavetju.org
edwinmavetju.org    |              Weblog: http://www.mavetju.org
/weblog/

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On Sat, Feb 16, 2008 at 03:45:12PM +1100, Edwin Groothuis
wrote:
> See http://bugs.
digium.com/view.php?id=11917 (it only talks about
> AGI scripts, but it's more generic, it also happens
with the Read()
> application in the dialplan)
> 
> The story so far:
> 
> - I have a call initiated by the Asterisk server with a
call file.
>   That works.
> 
> - During the call I will ask for a couple of digits.
> 
> The dialplan is as follow (just FYI, this all works)
> 
>     [context-tools]
>     exten => 123,1,NoOp(Callback1)
>     exten => 123,n,Answer()
>     exten =>
123,n,Read(foo,one-moment-please,3,,,10);
>     exten => 123,n,SayDigits($)
>     exten => 123,n,AGI(callback1.agi)
> 
>     [context-callback]
>     exten => _.X,1,NoOp(callback time)
>     exten => _.X,n,Answer()
>     exten =>
_.X,n,Read(foo,one-moment-please,3,n,,10);
>     exten => _.X,n,SayDigits($);
>     exten => _.X,n,Hangup
> 
> Now the strange thing is the Read() on 123 does
recognize the
> DTMF keys, while the Read() in the callback does not
recognized the
> DTMF keys.
> 
> Going through some code I ended up at main/channel.c at
the
> ast_waitfordigit_full() function which did do a
ast_read(). For the
                         ast_waitfor_nandfds() ---^^^^^^^^

> Read() on 123, the ast_read now and then showed a
AST_FRAME_DTMF_END.
                     ^^^^^^^^-- ast_waitfor_nandfds()
> But for the Read() in the callback it didn't show up.
> 
> At that moment I thought that this might be a
left-right-channel issue:
> 
> Under normal circumstances, the user telephone (the
originating
> channel) calls the PABX. So the user data comes from
originating
> channel to the channel and the Read() function gets the
data from
> the originating channel.
> 
> But with call files, the user telephone is on the
outgoing channel
> and thus should the Read() function get the data from
the outgoing
> channel.
> 
> 
> The question of course is.... Does this explanation
make sense?
> 
> (Oh, and where is the link between the DialPlan and the
call to the
> Read() function? (Don't worry, I'll find it )

(Just to prevent confusion 

Edwin
-- 
Edwin Groothuis      |            Personal website: http://www.mavetju.org
edwinmavetju.org    |              Weblog: http://www.mavetju.org
/weblog/

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Is there nobody who wants to exchange ideas with me about
this?

Edwin

On Sat, Feb 16, 2008 at 06:25:54PM +1100, Edwin Groothuis
wrote:
> On Sat, Feb 16, 2008 at 03:45:12PM +1100, Edwin
Groothuis wrote:
> > See http://bugs.
digium.com/view.php?id=11917 (it only talks about
> > AGI scripts, but it's more generic, it also
happens with the Read()
> > application in the dialplan)
> > 
> > The story so far:
> > 
> > - I have a call initiated by the Asterisk server
with a call file.
> >   That works.
> > 
> > - During the call I will ask for a couple of
digits.
> > 
> > The dialplan is as follow (just FYI, this all
works)
> > 
> >     [context-tools]
> >     exten => 123,1,NoOp(Callback1)
> >     exten => 123,n,Answer()
> >     exten =>
123,n,Read(foo,one-moment-please,3,,,10);
> >     exten => 123,n,SayDigits($)
> >     exten => 123,n,AGI(callback1.agi)
> > 
> >     [context-callback]
> >     exten => _.X,1,NoOp(callback time)
> >     exten => _.X,n,Answer()
> >     exten =>
_.X,n,Read(foo,one-moment-please,3,n,,10);
> >     exten => _.X,n,SayDigits($);
> >     exten => _.X,n,Hangup
> > 
> > Now the strange thing is the Read() on 123 does
recognize the
> > DTMF keys, while the Read() in the callback does
not recognized the
> > DTMF keys.
> > 
> > Going through some code I ended up at
main/channel.c at the
> > ast_waitfordigit_full() function which did do a
ast_read(). For the
>                          ast_waitfor_nandfds()
---^^^^^^^^
> 
> > Read() on 123, the ast_read now and then showed a
AST_FRAME_DTMF_END.
>                      ^^^^^^^^-- ast_waitfor_nandfds()
> > But for the Read() in the callback it didn't show
up.
> > 
> > At that moment I thought that this might be a
left-right-channel issue:
> > 
> > Under normal circumstances, the user telephone
(the originating
> > channel) calls the PABX. So the user data comes
from originating
> > channel to the channel and the Read() function
gets the data from
> > the originating channel.
> > 
> > But with call files, the user telephone is on the
outgoing channel
> > and thus should the Read() function get the data
from the outgoing
> > channel.
> > 
> > 
> > The question of course is.... Does this
explanation make sense?
> > 
> > (Oh, and where is the link between the DialPlan
and the call to the
> > Read() function? (Don't worry, I'll find it )
> 
> (Just to prevent confusion 
> 
> Edwin
> -- 
> Edwin Groothuis      |            Personal website: http://www.mavetju.org
> edwinmavetju.org    |              Weblog: http://www.mavetju.org
/weblog/
> 
> _______________________________________________
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> 
> asterisk-dev mailing list
> To UNSUBSCRIBE or update options visit:
>    http://lists.digium.com/mailman/listinfo/asterisk-dev
> 

-- 
Edwin Groothuis      |            Personal website: http://www.mavetju.org
edwinmavetju.org    |              Weblog: http://www.mavetju.org
/weblog/

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