asterisk users - Jan 2020 - delivery verification of instant messages with pjsip

Hi,

when sending IMs from endpoint to endpoint with the MessageSend() application, 
I can check the MESSAGE_SEND_STATUS and send another message to the sender of 
the message to notify them that their message was not sent when the status 
indicates it.

This works fine with chan_sip.  With chan_pjsip, this works differently in 
that MESSAGE_SEND_STATUS is "SUCCESS" after sending the message, and
only
later asterisk figures out that it is "Unable to retrieve contact for
endpoint
<xxx>" when there are no contacts and thus the message never gets
delivered.

How can I check if the endpoint has contacts --- or preferably --- if the 
message was actually delivered to an endpoint?  It would be sufficient to get 
it to work with endpoints that are not supposed to have more than one contact.

On Thu, Jan 30, 2020 at 9:35 AM hw <hw at gc-24.de> wrote:
> Hi,
>
> when sending IMs from endpoint to endpoint with the MessageSend()
> application,
> I can check the MESSAGE_SEND_STATUS and send another message to the sender
> of
> the message to notify them that their message was not sent when the status
> indicates it.
>
> This works fine with chan_sip.  With chan_pjsip, this works differently in
> that MESSAGE_SEND_STATUS is "SUCCESS" after sending the message,
and only
> later asterisk figures out that it is "Unable to retrieve contact for
> endpoint
> <xxx>" when there are no contacts and thus the message never
gets
> delivered.
>
> How can I check if the endpoint has contacts --- or preferably --- if the
> message was actually delivered to an endpoint?  It would be sufficient to
> get
> it to work with endpoints that are not supposed to have more than one
> contact.
>
Making MESSAGE_SEND_STATUS reflect whether the message was sent or not for
PJSIP was merged in 2 days ago[1]. It will be in a future release. If you
don't want to wait you could use device state to know if the device is
reachable (and thus a MESSAGE has a chance of being sent) using the
DEVICE_STATE dialplan function[2].

[1] https://gerrit.asterisk.org/c/asterisk/+/13674
[2]
https://wiki.asterisk.org/wiki/display/AST/Asterisk+17+Function_DEVICE_STATE

-- 
Joshua C. Colp
Asterisk Technical Lead
Sangoma Technologies
Check us out at www.sangoma.com and www.asterisk.org
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On Thursday, January 30, 2020 2:38:31 PM CET Joshua C. Colp
wrote:
> On Thu, Jan 30, 2020 at 9:35 AM hw <hw at gc-24.de> wrote:
> > Hi,
> > 
> > when sending IMs from endpoint to endpoint with the MessageSend()
> > application,
> > I can check the MESSAGE_SEND_STATUS and send another message to the
sender
> > of
> > the message to notify them that their message was not sent when the
status
> > indicates it.
> > 
> > This works fine with chan_sip.  With chan_pjsip, this works
differently in
> > that MESSAGE_SEND_STATUS is "SUCCESS" after sending the
message, and only
> > later asterisk figures out that it is "Unable to retrieve contact
for
> > endpoint
> > <xxx>" when there are no contacts and thus the message
never gets
> > delivered.
> > 
> > How can I check if the endpoint has contacts --- or preferably --- if
the
> > message was actually delivered to an endpoint?  It would be sufficient
to
> > get
> > it to work with endpoints that are not supposed to have more than one
> > contact.
> 
> Making MESSAGE_SEND_STATUS reflect whether the message was sent or not for
> PJSIP was merged in 2 days ago[1]. It will be in a future release. If you
> don't want to wait you could use device state to know if the device is
> reachable (and thus a MESSAGE has a chance of being sent) using the
> DEVICE_STATE dialplan function[2].
Perfect answer, thanks! :)

I think I'll just update from the git repo then and see if it works.

> [1] https://gerrit.asterisk.org/c/asterisk/+/13674
> [2]
>
https://wiki.asterisk.org/wiki/display/AST/Asterisk+17+Function_DEVICE_STATE