[asterisk-dev] LibPRI

[Konrad Endruszkiewicz]

Hi,

thanks for info. I will have a look on this sig_pri.c from Asterisk code.
Right now I'm struggling with the issue of handling situation, when
the app is getting RING event, the call is answered, but when by the
network issues, the call is cut off, then I don't get the HANG UP
event and the app is still considering that call is active.
The card is using Unnumbered frame event, when this kind of event
occurs, where subtype is set to SABME (set asynchronous balanced mode
extended).

But libpri seems not have the direct way to handle this event (or I
cannot find how to capture this).
Maybe you have any idea how to approach this?

Best regards,
______________________________________________

Konrad End


2017-05-23 19:27 GMT+04:00 Matt Fredrickson <creslin at digium.com>:
> On Tue, May 23, 2017 at 5:06 AM, Konrad Endruszkiewicz
> <konradend at gmail.com> wrote:
>> Hi,
>>
>> I looking for documentation for LibPRI 1.6 or any samples where this
>> library is used.
>> I need to build a software on top of this library to support big callcenter.
>
> Hi Konrad,
>
> Libpri is a library that runs on top of a DAHDI channel that operates
> in HDLC mode.  It assumes that the HDLC encoding/decoding as well as
> CRC generation/checking occurs at lower layers - typically the dahdi
> layer.  It implements an abstraction over the Q.921 and Q.931 layers
> that is easier to use and understand that dealing with messages
> directly.
>
> The best place to look for an example with high use is that used in
> chan_dahdi.c (more specifically, sig_pri.c) in the Asterisk source
> code.  There are one or two test applications in the libpri repo that
> can be seen as simpler implementations, but I can't remember if they
> still work or not (testprilib.c and pritest.c, IIRC).
>
> Hope that helps!
>
> --
> Matthew Fredrickson
> Digium, Inc. | Engineering Manager
> 445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
>
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