10 Dec
2009
10 Dec
'09
4 p.m.
Hey,
I need to rewrite the $tU variable on a packet before it is relayed. It
is ok if the change is only on the relayed packet and the $tU variable
change. The important thing is that I modify the To header, it seems
that rewritting $tU would be the easiest.
I know that user agents do not like this changing, but I am changing it
on an intermediary server and when the reply comes back, I change it
back to the original value.
Thanks!
David
10 Dec
10 Dec
4:04 p.m.
El Jueves, 10 de Diciembre de 2009, David escribió:
Hey,
I need to rewrite the $tU variable on a packet before it is relayed. It
is ok if the change is only on the relayed packet and the $tU variable
change. The important thing is that I modify the To header, it seems
that rewritting $tU would be the easiest.
$tU is not writable, but just readable.
If you want to change the "To" header you should do some "dirty"
replacing
operation (see textops module).
I know that user agents do not like this changing, but
I am changing it
on an intermediary server and when the reply comes back, I change it
back to the original value.
Does it mean that the intermediary server inspects To rather than RURI? It
just shouldn't do it.
--
Iñaki Baz Castillo <ibc(a)aliax.net>
4:17 p.m.
10 dec 2009 kl. 15.04 skrev Iñaki Baz Castillo:
El Jueves, 10 de Diciembre de 2009, David escribió:
This is propably something we need to change and make the To and From headers writable.
It's not dirty to change them any more.
David: In the original SIP 1.0 protocol the To/From headers was part of the dialog
identification, thus you where not allowed to change them in a proxy. THis was kept in
RFC3261 - sip v2 - but has been removed in an additional RFC a short while ago (seen from
SIP history).
Regards,
/O
Hey,
I need to rewrite the $tU variable on a packet before it is relayed. It
is ok if the change is only on the relayed packet and the $tU variable
change. The important thing is that I modify the To header, it seems
that rewritting $tU would be the easiest.
$tU is not writable, but just readable.
If you want to change the "To" header you should do some "dirty"
replacing
operation (see textops module). 
5:55 p.m.
Hey,
I do understand that normally the TO header should not be written, my
problem is that I am using the presence_dialoginfo module which uses the
TO header and not the RURI, which means that in order to tell the
difference between customer A's extension 101 and Customer B's extension
101, I rewrite the TO header to add context.
This is actually the ame problem that I started discussing here :
http://lists.kamailio.org/pipermail/users/2009-August/024316.html
Trouble is I have not had time to work on this since then.
Thanks,
David
Olle E. Johansson a écrit :
10 dec 2009 kl. 15.04 skrev Iñaki Baz Castillo:
El Jueves, 10 de Diciembre de 2009, David
escribió:
This is propably something we need to change and make the To and From headers writable.
It's not dirty to change them any more.
David: In the original SIP 1.0 protocol the To/From headers was part of the dialog
identification, thus you where not allowed to change them in a proxy. THis was kept in
RFC3261 - sip v2 - but has been removed in an additional RFC a short while ago (seen from
SIP history).
Regards,
/O
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Users(a)lists.kamailio.org
http://lists.kamailio.org/cgi-bin/mailman/listinfo/users
http://lists.openser-project.org/cgi-bin/mailman/listinfo/users
Hey,
I need to rewrite the $tU variable on a packet before it is relayed. It
is ok if the change is only on the relayed packet and the $tU variable
change. The important thing is that I modify the To header, it seems
that rewritting $tU would be the easiest.
$tU is not writable, but just readable.
If you want to change the "To" header you should do some "dirty"
replacing
operation (see textops module).
5:56 p.m.
Hey,
I do understand that normally the TO header should not be written, my
problem is that I am using the presence_dialoginfo module which uses the
TO header and not the RURI, which means that in order to tell the
difference between customer A's extension 101 and Customer B's extension
101, I rewrite the TO header to add context.
This is actually the ame problem that I started discussing here :
http://lists.kamailio.org/pipermail/users/2009-August/024316.html
Trouble is I have not had time to work on this since then.
Thanks,
David
Olle E. Johansson a écrit :
10 dec 2009 kl. 15.04 skrev Iñaki Baz Castillo:
El Jueves, 10 de Diciembre de 2009, David
escribió:
This is propably something we need to change and make the To and From headers writable.
It's not dirty to change them any more.
David: In the original SIP 1.0 protocol the To/From headers was part of the dialog
identification, thus you where not allowed to change them in a proxy. THis was kept in
RFC3261 - sip v2 - but has been removed in an additional RFC a short while ago (seen from
SIP history).
Regards,
/O
_______________________________________________
Kamailio (OpenSER) - Users mailing list
Users(a)lists.kamailio.org
http://lists.kamailio.org/cgi-bin/mailman/listinfo/users
http://lists.openser-project.org/cgi-bin/mailman/listinfo/users
Hey,
I need to rewrite the $tU variable on a packet before it is relayed. It
is ok if the change is only on the relayed packet and the $tU variable
change. The important thing is that I modify the To header, it seems
that rewritting $tU would be the easiest.
$tU is not writable, but just readable.
If you want to change the "To" header you should do some "dirty"
replacing
operation (see textops module).
6:06 p.m.
Hey,
I won't pretend to be an expert in Kamailio, someone will probably
suggest a better way. But here is how I rewrote my SIP packet's TO
header before relaying it to the next hop :
# Rewrite RURI
avp_printf("$rU", "prefix_$rU");
# Remove existing header
remove_hf("To") ;
# Add new header which is copied from RURI
insert_hf("To: $ru\r\n", "From");
DISCLAIMER : Several threads have said that changing the TO header is a
bad idea, so I only recommend using this as a last resort.
David
David a écrit :
Hey,
I do understand that normally the TO header should not be written, my
problem is that I am using the presence_dialoginfo module which uses the
TO header and not the RURI, which means that in order to tell the
difference between customer A's extension 101 and Customer B's extension
101, I rewrite the TO header to add context.
This is actually the ame problem that I started discussing here :
http://lists.kamailio.org/pipermail/users/2009-August/024316.html
Trouble is I have not had time to work on this since then.
Thanks,
David
Olle E. Johansson a écrit :
10 dec 2009 kl. 15.04 skrev Iñaki Baz Castillo:
_______________________________________________
Kamailio (OpenSER) - Users mailing list
Users(a)lists.kamailio.org
http://lists.kamailio.org/cgi-bin/mailman/listinfo/users
http://lists.openser-project.org/cgi-bin/mailman/listinfo/users El Jueves, 10 de Diciembre de 2009, David
escribió:
This is propably something we need to change and make the To and From
headers writable.
It's not dirty to change them any more.
David: In the original SIP 1.0 protocol the To/From headers was part
of the dialog identification, thus you where not allowed to change
them in a proxy. THis was kept in RFC3261 - sip v2 - but has been
removed in an additional RFC a short while ago (seen from SIP history).
Regards,
/O
_______________________________________________
Kamailio (OpenSER) - Users mailing list
Users(a)lists.kamailio.org
http://lists.kamailio.org/cgi-bin/mailman/listinfo/users
http://lists.openser-project.org/cgi-bin/mailman/listinfo/users
Hey,
I need to rewrite the $tU variable on a packet before it is
relayed. It
is ok if the change is only on the relayed packet and the $tU variable
change. The important thing is that I modify the To header, it seems
that rewritting $tU would be the easiest.
$tU is not writable, but just readable.
If you want to change the "To" header you should do some "dirty"
replacing operation (see textops module).
11 Dec
11 Dec
10:03 a.m.
Hello,
with the latest version there are alternatives you can use:
On 12/10/09 5:06 PM, David wrote:
Hey,
I won't pretend to be an expert in Kamailio, someone will probably
suggest a better way. But here is how I rewrote my SIP packet's TO
header before relaying it to the next hop :
# Rewrite RURI
avp_printf("$rU", "prefix_$rU");
$rU = "prefix_" + $rU;
# Remove existing header
remove_hf("To") ;
# Add new header which is copied from RURI
insert_hf("To: $ru\r\n", "From");
you can do in one step, so you avoid operations on r-uri:
insert_hf("To: sip:prefix_$rU@$rd\r\n", "From");
DISCLAIMER : Several threads have said that changing the TO header is
a bad idea, so I only recommend using this as a last resort.
If devices are RFC3261 (SIP 2.0), then it is ok. If there are SIP 1.0
devices, then you have to preserve To/From header.
For the future, I would add options to change the From/To values via
pseudo-variables. It is the admin to decide to use it or not -- now
people need and do workarounds with subst or append_hf().
Cheers,
Daniel
David
David a écrit :
--
Daniel-Constantin Mierla
* http://www.asipto.com/
Hey,
I do understand that normally the TO header should not be written, my
problem is that I am using the presence_dialoginfo module which uses the
TO header and not the RURI, which means that in order to tell the
difference between customer A's extension 101 and Customer B's extension
101, I rewrite the TO header to add context.
This is actually the ame problem that I started discussing here :
http://lists.kamailio.org/pipermail/users/2009-August/024316.html
Trouble is I have not had time to work on this since then.
Thanks,
David
Olle E. Johansson a écrit :
_______________________________________________
Kamailio (OpenSER) - Users mailing list
Users(a)lists.kamailio.org
http://lists.kamailio.org/cgi-bin/mailman/listinfo/users
http://lists.openser-project.org/cgi-bin/mailman/listinfo/users
10 dec 2009 kl. 15.04 skrev Iñaki Baz Castillo:
_______________________________________________
Kamailio (OpenSER) - Users mailing list
Users(a)lists.kamailio.org
http://lists.kamailio.org/cgi-bin/mailman/listinfo/users
http://lists.openser-project.org/cgi-bin/mailman/listinfo/users El Jueves, 10 de Diciembre de 2009, David
escribió:
> Hey,
>
> I need to rewrite the $tU variable on a packet before it is
> relayed. It
> is ok if the change is only on the relayed packet and the $tU
> variable
> change. The important thing is that I modify the To header, it seems
> that rewritting $tU would be the easiest.
$tU is not writable, but just readable.
If you want to change the "To" header you should do some "dirty"
replacing operation (see textops module).
This is propably something we need to change and make the To and
From headers writable.
It's not dirty to change them any more.
David: In the original SIP 1.0 protocol the To/From headers was part
of the dialog identification, thus you where not allowed to change
them in a proxy. THis was kept in RFC3261 - sip v2 - but has been
removed in an additional RFC a short while ago (seen from SIP history).
Regards,
/O
_______________________________________________
Kamailio (OpenSER) - Users mailing list
Users(a)lists.kamailio.org
http://lists.kamailio.org/cgi-bin/mailman/listinfo/users
http://lists.openser-project.org/cgi-bin/mailman/listinfo/users
5463
days inactive
5464
days old
6 comments
5 participants
participants (5)
-
Daniel-Constantin Mierla -
David -
David -
Iñaki Baz Castillo -
Olle E. Johansson