6 Oct
2005
6 Oct
'05
12:29 p.m.
Hi,
A newbie question:
Is there a way for OpenSER to use SIP headers (other than the URI
set) that have been modified/processed by an external command
(exec_dst, exec_msg)?
Reading the documentation and mailing list archives revealed some
questions similar to mine but no answer.
The problem is: Delegate the change of one or more SIP message
headers (or the whole SIP message) to an external application via
exec module.
Two straight-forward solutions:
1. exec_rmsg() - for "replace message". A merge of the functionality
of exec_dst() and exec_msg(), i.e. OpenSER uses the output of
exec_rmsg(command) to replace the current SIP message. This is
imho an extremly flexible solution but slightly difficult to
implement as it requires at least parsing the command's output
- similar to a message received by OpenSER.
2. The command executed by exec_msg() can modify the environment
variables SIP_HF_<hf_name> and OpenSER reuses these values after
the exec() returned control to SER.
Setvars could be used to switch between the current, read-only
meaning of env-variables (e.g., modparam("exec", "setvars", 1))
and a read-write behavior (e.g. modparam("exec", "setvars", 2).
This solution does not require any special handling except that
OpenSER must read back the content of all environment variables
which were passed to the command. Probably quite easy to implement
but has the drawback that no new header fields can be added.
Imho no major limitation as users can add their (dummy) header
fields prior to invoking the command via exec()
Or is there any other existing/planned procedure for SER to use the
output of external commands for rewriting an existing SIP message.
tia
best regards
--Joachim
6 Oct
6 Oct
2:48 p.m.
Hello,
On 10/06/05 12:29, Joachim Fabini wrote:
Hi,
A newbie question:
Is there a way for OpenSER to use SIP headers (other than the URI
set) that have been modified/processed by an external command
(exec_dst, exec_msg)?
Reading the documentation and mailing list archives revealed some
questions similar to mine but no answer.
The problem is: Delegate the change of one or more SIP message
headers (or the whole SIP message) to an external application via
exec module.
Two straight-forward solutions:
1. exec_rmsg() - for "replace message". A merge of the functionality
of exec_dst() and exec_msg(), i.e. OpenSER uses the output of
exec_rmsg(command) to replace the current SIP message. This is
imho an extremly flexible solution but slightly difficult to
implement as it requires at least parsing the command's output
- similar to a message received by OpenSER.
2. The command executed by exec_msg() can modify the environment
variables SIP_HF_<hf_name> and OpenSER reuses these values after
the exec() returned control to SER.
Setvars could be used to switch between the current, read-only
meaning of env-variables (e.g., modparam("exec", "setvars", 1))
and a read-write behavior (e.g. modparam("exec", "setvars", 2).
This solution does not require any special handling except that
OpenSER must read back the content of all environment variables
which were passed to the command. Probably quite easy to implement
but has the drawback that no new header fields can be added.
Imho no major limitation as users can add their (dummy) header
fields prior to invoking the command via exec()
Or is there any other existing/planned procedure for SER to use the
output of external commands for rewriting an existing SIP message.
Other possibilities would be to pass the data through database (write in
a table and from there load via avpops) or via fifo interface (write
data to fifo file, then store it in share memory and afterwards reuse it
from there -- this requires development).
Daniel
tia
best regards
--Joachim
_______________________________________________
Users mailing list
Users(a)openser.org
http://openser.org/cgi-bin/mailman/listinfo/users
3:06 p.m.
Hi Joachim!
Using exec is not a nice solution. Maybe it would be better to write a
new module (or modify an existing module which add/rewrites headers).
Also avops is very powerful and can rewrite and add headers.
Can you describe the task of the external script? Maybe we can find a
better solution.
regards
klaus
Joachim Fabini wrote:
Hi,
A newbie question:
Is there a way for OpenSER to use SIP headers (other than the URI
set) that have been modified/processed by an external command
(exec_dst, exec_msg)?
Reading the documentation and mailing list archives revealed some
questions similar to mine but no answer.
The problem is: Delegate the change of one or more SIP message
headers (or the whole SIP message) to an external application via
exec module.
Two straight-forward solutions:
1. exec_rmsg() - for "replace message". A merge of the functionality
of exec_dst() and exec_msg(), i.e. OpenSER uses the output of
exec_rmsg(command) to replace the current SIP message. This is
imho an extremly flexible solution but slightly difficult to
implement as it requires at least parsing the command's output
- similar to a message received by OpenSER.
2. The command executed by exec_msg() can modify the environment
variables SIP_HF_<hf_name> and OpenSER reuses these values after
the exec() returned control to SER.
Setvars could be used to switch between the current, read-only
meaning of env-variables (e.g., modparam("exec", "setvars", 1))
and a read-write behavior (e.g. modparam("exec", "setvars", 2).
This solution does not require any special handling except that
OpenSER must read back the content of all environment variables
which were passed to the command. Probably quite easy to implement
but has the drawback that no new header fields can be added.
Imho no major limitation as users can add their (dummy) header
fields prior to invoking the command via exec()
Or is there any other existing/planned procedure for SER to use the
output of external commands for rewriting an existing SIP message.
tia
best regards
--Joachim
_______________________________________________
Users mailing list
Users(a)openser.org
http://openser.org/cgi-bin/mailman/listinfo/users
4:02 p.m.
Hi Klaus,
Using exec is not a nice solution. Maybe it would be
better
to write a
new module (or modify an existing module which add/rewrites headers).
Also avops is very powerful and can rewrite and add headers.
I agree with you that exec is not the kind of technology to be
used in production systems. ;)
Can you describe the task of the external script? Maybe we can
find a better solution.
Our focus is on what I suppose the exec interface was primarily
intended to do: lowest-cost testing mechanism. Basically it's
(or at least should be) a way to test features before they are
implemented - as you suggested - within dedicated modules.
Alternatively, a specific example: integration of an existing
Diameter client into OpenSER for testing purposes.
Most of the tasks we'd like to do can probably be implemented
using operations supported by avpops. My initial question was
more conceptual in nature - is the exec() module intended to be
used bidirectionally or not. The answer is: apparently not, as
I see some kind of triangle routing via avpops and databases. ;)
My personal opinion is that for OpenSER module prototyping
a bidirectional exec interface can be an excellent help.
Thanks to you and Daniel for your replies,
regards
--Joachim
18 Oct
18 Oct
1:53 p.m.
New subject: [Users] Adding new header fields to Status message (Registrar/200 OK)?
Hi,
Again, complete newbie question (honestly, I searched
the OpenSER and SER archives and did not find an answer ;):
(How) can OpenSER add a new header field into the
registrar's 200 OK status message in reply to a
successful REGISTER? (New header field meaning that
the header line was not present in the REGISTER).
What I tried so far is to add the field in two ways:
- Added the field to the incoming REGISTER message
while doing the main processing using append_hf().
The new header field is not included into the
200 OK.
- Added the field within the OnReply_Route[1] block
(triggered). But apparently OpenSER does invoke
the OnReply_Route only for incoming status messages.
When the code is invoked by a proxy on traversing
status messages it works perfectly, for the
registrar it does not.
Any idea how to modify Registrar-outgoing status
messages?
Many thanks in advance,
--Joachim
1:59 p.m.
New subject: [Users] Adding new header fields to Status message (Registrar/200 OK)?
Hi Joachim,
see append_to_reply() function
http://www.openser.org/docs/modules/0.10.x/textops.html#AEN168
note that save() internally sends the 200 ok, so you need to call
append_to_reply() before save()
regards,
bogdan
Joachim Fabini wrote:
Hi,
Again, complete newbie question (honestly, I searched
the OpenSER and SER archives and did not find an answer ;):
(How) can OpenSER add a new header field into the
registrar's 200 OK status message in reply to a
successful REGISTER? (New header field meaning that
the header line was not present in the REGISTER).
What I tried so far is to add the field in two ways:
- Added the field to the incoming REGISTER message
while doing the main processing using append_hf().
The new header field is not included into the
200 OK.
- Added the field within the OnReply_Route[1] block
(triggered). But apparently OpenSER does invoke
the OnReply_Route only for incoming status messages.
When the code is invoked by a proxy on traversing
status messages it works perfectly, for the
registrar it does not.
Any idea how to modify Registrar-outgoing status
messages?
Many thanks in advance,
--Joachim
_______________________________________________
Users mailing list
Users(a)openser.org
http://openser.org/cgi-bin/mailman/listinfo/users
2:09 p.m.
New subject: [Users] Adding new header fields to Status message (Registrar/200 OK)?
Hi Bogdan,
see append_to_reply() function
http://www.openser.org/docs/modules/0.10.x/textops.html#AEN168
Excellent, that's what I was looking for.
note that save() internally sends the 200 ok, so you need to call
append_to_reply() before save()
Good to know...
thanks again,
best regards
--Joachim
7:01 p.m.
New subject: [Users] multiple balanced RTPProxys
Hello,
I see that the nathelper module of openser has the possibility to have
multiple rtpproxy, but I don't have found any example.
How can I configure this?
Thanks
Laurent
15 Nov
15 Nov
2:54 p.m.
New subject: [Users] multiple balanced RTPProxys
Hi Laurent,
I'm afraid there is no much documentation about this - actually not at
all. Can you please submit a request on the project for documentation?
http://sourceforge.net/tracker/?group_id=139143
regards,
bogdan
Schweizer Laurent wrote:
Hello,
I see that the nathelper module of openser has the possibility to have
multiple rtpproxy, but I don't have found any example.
How can I configure this?
Thanks
Laurent
_______________________________________________
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Users(a)openser.org
http://openser.org/cgi-bin/mailman/listinfo/users
18 Oct
18 Oct
9:29 p.m.
New subject: [Users] Adding new header fields to Status message (Registrar/200 OK)?
Just mention other possibility, you can use avp_pushto() to add dynamic
content to the headers, in both replies or requests. See:
http://www.voice-system.ro/docs/avpops/ar01s06.html#avp_pushto
Cheers,
Daniel
On 10/18/05 14:09, Joachim Fabini wrote:
Hi Bogdan,
see append_to_reply() function
http://www.openser.org/docs/modules/0.10.x/textops.html#AEN168
Excellent, that's what I was looking for.
note that save() internally sends the 200 ok, so
you need to call
append_to_reply() before save()
Good to know...
thanks again,
best regards
--Joachim
_______________________________________________
Users mailing list
Users(a)openser.org
http://openser.org/cgi-bin/mailman/listinfo/users
6953
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9 comments
5 participants
participants (5)
-
Bogdan-Andrei Iancu -
Daniel-Constantin Mierla -
Joachim Fabini -
Klaus Darilion -
Schweizer Laurent