На 2018-10-31 20:44, Matt Fredrickson написа:
On Mon, Oct 29, 2018 at 10:33 AM Kaloyan Kovachev <kkovac...@varna.net>
wrote:
Hello list,
I have followed the example from
https://wiki.asterisk.org/wiki/display/AST/Manipulating+Party+ID+Information
to unconditionally forward a call between two Asterisk instances
connected over IAX, but it seems there is a bug or the example is
incomplete.
The setup is:
Astersik A receives a call over DAHDI (libSS7) or SIP and forwards
the
call to Asterisk B over IAX
Astersik B checks the database and if redirecting is required sets
the
REDIRECTING details as above and forwards the call to Astersik A as a
new call, again over IAX, which should dial out over SIP or DAHDI
The problem is that only REDIRECTING(from-num) is populated and all
the
rest is blank with count remaining 0, so no redirection info is
forwarded with the new call.
Is there something else that needs to be set or it's a bug in the
IAX
code to ignore the rest of the fields?
Which other fields specifically are you looking for?
It's quite possible the IAX2 protocol doesn't support some of the
additional redirection info.
REDIRECTING(from-num) seems to get mapped to the RDNIS IE in IAX
protocol land. I guess it's going to just depend on what other fields
you need or are looking for.
The problem is that the most important ones 'count' and 'reason' are not
forwarded and most of the code does not even bother to check the rest if
'count' is 0, so redirecting loops are possible if IAX is used somewhere
in the path.
Just made a test redirecting my mobile number to my fixed one and
checking
${REDIRECTING(count)}/${REDIRECTING(reason)}/${REDIRECTING(from-all)}/${REDIRECTING(orig-all)}/${REDIRECTING(to-all)}
with NoOp:
libss7 ( on Asterisk A) sets the first 4 as received from the telco (
will need to patch it to also set the 'to' fields )
the call is then forwarded to the second Asterisk ( B ) where the same
NoOp only shows the 'from' field populates, so all the rest are lost
on Asterisk B the call is further forwarded - 'count' is actually reset
to 1 (allowing loops to be created) and 'orig' is lost
Expected behavior:
all 5 fields received over SS7 should be forwarded over IAX to preserve
the call divert information
on subsequent redirection the 'count' should be incremented instead of
being reset to prevent call loops
Should i open a bug report in this case, as it seems it's not something
that i am doing wrong?
--
Matthew Fredrickson
Digium - A Sangoma Company | Asterisk Project Lead
445 Jan Davis Drive NW - Huntsville, AL 35806 - USA
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