13 Dec
2024
13 Dec
'24
5:35 a.m.
Hi
Is there a way to remove an param from the top most rr header?
I add a rr param towards the B CPE to store some information which is
sent back on the rr header of the reply from B.
So far this is what is intended and I also get this param in subsequent
route headers from messages created by B and as the route header are
remove towards A, this works fine.
Unfortunately, in a case of a reply, the parameter is passed to A
which is then sending back the param in the route header which would
make it somehow complicated to figure out which side sent that
parameter. I'm only interested if sent from B.
So I wonder, is there a way to delete a rr param on replies to make
sure I don't get it back in the ACK to the reply?
--
Mit freundlichen Grüssen
-Benoît Panizzon- @ HomeOffice und normal erreichbar
--
I m p r o W a r e A G - Leiter Commerce Kunden
______________________________________________________
Zurlindenstrasse 29 Tel +41 61 826 93 00
CH-4133 Pratteln Fax +41 61 826 93 01
Schweiz Web http://www.imp.ch
______________________________________________________
13 Dec
13 Dec
8:41 a.m.
Hi
You could try subst_hf() from textops to do it. I didn't find any
simpler way to do it. It may be possible to do this with URI
transformations, too, but I didn't experiment with those.
subst_hf("Record-Route", "/;zoink=[^;>]*//", "a");
It changed these header fields to these.
Record-Route:
<sip:10.25.10.1;r2=on;lr;ftag=gK002f29d3;zoink=freddie;yoink=meatloaf>
Record-Route: <sip:10.17.12.2;r2=on;lr;ftag=gK002f29d3;zoink=freddie>
Record-Route: <sip:10.25.10.1;r2=on;lr;ftag=gK002f29d3;yoink=meatloaf>
Record-Route: <sip:10.17.12.2;r2=on;lr;ftag=gK002f29d3>
By the way, the rr parameter for adding ftag to the RR header fields
can later be used to see which direction (the is_direction() function)
the request is going in, so you may not even need to change the
Record-Route values if you use that.
- https://kamailio.org/docs/modules/5.8.x/modules/rr.html#rr.p.append_fromtag…
- https://kamailio.org/docs/modules/5.8.x/modules/rr.html#rr.f.is_direction
James
On Fri, 13 Dec 2024 at 10:42, Benoît Panizzon via sr-users
<sr-users(a)lists.kamailio.org> wrote:
Hi
Is there a way to remove an param from the top most rr header?
I add a rr param towards the B CPE to store some information which is
sent back on the rr header of the reply from B.
So far this is what is intended and I also get this param in subsequent
route headers from messages created by B and as the route header are
remove towards A, this works fine.
Unfortunately, in a case of a reply, the parameter is passed to A
which is then sending back the param in the route header which would
make it somehow complicated to figure out which side sent that
parameter. I'm only interested if sent from B.
So I wonder, is there a way to delete a rr param on replies to make
sure I don't get it back in the ACK to the reply?
--
Mit freundlichen Grüssen
-Benoît Panizzon- @ HomeOffice und normal erreichbar
--
I m p r o W a r e A G - Leiter Commerce Kunden
______________________________________________________
Zurlindenstrasse 29 Tel +41 61 826 93 00
CH-4133 Pratteln Fax +41 61 826 93 01
Schweiz Web http://www.imp.ch
______________________________________________________
__________________________________________________________
Kamailio - Users Mailing List - Non Commercial Discussions --
sr-users(a)lists.kamailio.org
To unsubscribe send an email to sr-users-leave(a)lists.kamailio.org
Important: keep the mailing list in the recipients, do not reply only to the sender!
10:32 a.m.
Hi James
I ended up first using:
$var(rr) = $(hfl(Record-Route){tobody.uri}{uri.param,rr}); to get my rr
param I wanted to remove and then the s.rm function from textops.
And as I fear, there is no function to change 'one' header, I ended
doing:
remove_hf("Record-Route");
And then re-insert the 'corrected' header in a while loop.
Well thinking about it just now, RR header should be at the beginning
of he message, maybe I need to get $hflc and then do a reverse while
loop and use insert_hf instead of append_hf
By the way, the rr parameter for adding ftag to the RR
header fields
can later be used to see which direction (the is_direction() function)
the request is going in, so you may not even need to change the
Record-Route values if you use that.
I am logging is_direction to find out how it exactly behaves. I also
considered using this function but I am not yet sure i fully understand
what it does, especially within replies.
--
Mit freundlichen Grüssen
-Benoît Panizzon- @ HomeOffice und normal erreichbar
--
I m p r o W a r e A G - Leiter Commerce Kunden
______________________________________________________
Zurlindenstrasse 29 Tel +41 61 826 93 00
CH-4133 Pratteln Fax +41 61 826 93 01
Schweiz Web http://www.imp.ch
______________________________________________________
11:11 a.m.
Hi Benoît
The is_direction function works by checking the From tag in the From
header and comparing it to the From tag in the Route header field.
Mid-dialog requests that are in the opposite direction (from that of
the original INVITE) have the To and From values swapped, so it's
possible to tell from the Route header fields whether the mid-dialog
request is from A to B or from B to A.
Anyway, getting the parameter, removing it, and then rebuilding the
Route header fields may work for you. I don't think I'd use that, but
it might work for you. You also need to be careful to not affect Route
values that other proxy servers might have added. I didn't consider
that in my first reply.
James
On Fri, 13 Dec 2024 at 15:32, Benoît Panizzon <benoit.panizzon(a)imp.ch> wrote:
Hi James
I ended up first using:
$var(rr) = $(hfl(Record-Route){tobody.uri}{uri.param,rr}); to get my rr
param I wanted to remove and then the s.rm function from textops.
And as I fear, there is no function to change 'one' header, I ended
doing:
remove_hf("Record-Route");
And then re-insert the 'corrected' header in a while loop.
Well thinking about it just now, RR header should be at the beginning
of he message, maybe I need to get $hflc and then do a reverse while
loop and use insert_hf instead of append_hf
By the way, the rr parameter for adding ftag to
the RR header fields
can later be used to see which direction (the is_direction() function)
the request is going in, so you may not even need to change the
Record-Route values if you use that.
I am logging is_direction to find out how it exactly behaves. I also
considered using this function but I am not yet sure i fully understand
what it does, especially within replies.
--
Mit freundlichen Grüssen
-Benoît Panizzon- @ HomeOffice und normal erreichbar
--
I m p r o W a r e A G - Leiter Commerce Kunden
______________________________________________________
Zurlindenstrasse 29 Tel +41 61 826 93 00
CH-4133 Pratteln Fax +41 61 826 93 01
Schweiz Web http://www.imp.ch
______________________________________________________ 
11:22 a.m.
Hello Benoit,
the "is_direction" function is indeed the way to go if you just want to get the
direction of a request. Its not needed to manually alter Record-Route headers.
The is_direction function only works on requests, not on replies.
Instead of altering the Record-Route header in the replies, what about just ignoring it
when you are getting a request from the a-side? Or maybe encode a or b-side in the
parameter name etc..
Cheers,
Henning
-----Original Message-----
From: Benoît Panizzon via sr-users <sr-users(a)lists.kamailio.org>
Sent: Friday, December 13, 2024 4:32 PM
To: James Browne <james(a)frideo.com>
Cc: Kamailio (SER) - Users Mailing List <sr-users(a)lists.kamailio.org>rg>; Benoît
Panizzon <benoit.panizzon(a)imp.ch>
Subject: [SR-Users] Re: How to remove rr param on a reply?
Hi James
I ended up first using:
$var(rr) = $(hfl(Record-Route){tobody.uri}{uri.param,rr}); to get my rr param I wanted to
remove and then the s.rm function from textops.
And as I fear, there is no function to change 'one' header, I ended
doing:
remove_hf("Record-Route");
And then re-insert the 'corrected' header in a while loop.
Well thinking about it just now, RR header should be at the beginning of he message, maybe
I need to get $hflc and then do a reverse while loop and use insert_hf instead of
append_hf
By the way, the rr parameter for adding ftag to the RR
header fields
can later be used to see which direction (the is_direction() function)
the request is going in, so you may not even need to change the
Record-Route values if you use that.
I am logging is_direction to find out how it exactly behaves. I also considered using this
function but I am not yet sure i fully understand what it does, especially within
replies.
--
Mit freundlichen Grüssen
-Benoît Panizzon- @ HomeOffice und normal erreichbar
--
I m p r o W a r e A G - Leiter Commerce Kunden
______________________________________________________
Zurlindenstrasse 29 Tel +41 61 826 93 00
CH-4133 Pratteln Fax +41 61 826 93 01
Schweiz Web http://www.imp.ch
______________________________________________________
__________________________________________________________
Kamailio - Users Mailing List - Non Commercial Discussions -- sr-users(a)lists.kamailio.org
To unsubscribe send an email to sr-users-leave(a)lists.kamailio.org
Important: keep the mailing list in the recipients, do not reply only to the sender!
14
days inactive
14
days old
4 comments
3 participants
participants (3)
-
Benoît Panizzon -
Henning Westerholt -
James Browne