sr-users December 2007

sr-users@lists.kamailio.org

130 participants
235 discussions

[OpenSER-Users] Module Programming
by Daniel Corbe 04 Dec '07

04 Dec '07

Hello, Is there a better module programming guide than the one found on the docuwiki at http://www.openser.org/dokuwiki/doku.php/development:write-module ? It really doesn't explain much; for example the fact that functions are (or used to be) called with a paramater struct sip_msg *. The original SER 0.8.x and 0.9.x core had an extremely comprehensive guide to writing modules; however, I'm reluctant to use those texts as a guide for fear that the material is dated. Regards, Daniel

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[OpenSER-Users] Regarding CRBT
by Amit Vijayvargiya 04 Dec '07

04 Dec '07

Hi all, can anybody tell where we have to put the routing code in openser.cfg for CRBT(caller ring backtone ) application. A------------------------------------------make call -------------->B same time A------------------------------------------------------------------------->C in "C" we are playing prompts. Regards Amit

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[OpenSER-Users] Could Any body suggest me an SIP programming interface please?
by Samira Salam 04 Dec '07

04 Dec '07

Hi , As a part of my MS project I proposed a 3-party authentication protocol which can be used in SIP too. for SIP. The proxy server utilizes this protocol to authenticate the UC's Invite,using the Registrar server. Now, I have to estimate the totoal overhead of the scheme on a normal SIP call. I searched dozens of SIP, UMTS, GSM related papers to find a simulator or emulator which could be used to to achive the goal but I couldn't get any solutions as I need to consider execution of the RSA,AES and SHA on the agent's processor, I also need the solution to answer me with not too much programming due to my time constraints. I browsed the Resirocate project docs but I don't think then can answer me in time. I am also not sure whether SIPp, MS LIve communication server and SERcan help me? Could you please suggest me any rapid solutions? Any simulation techniques?any piece of software or programmining interface? By the way I am a little familiar with opnet as I did a tiny project with it. Doest it help me? Thanks in advance. Samira. --------------------------------- Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now.

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[OpenSER-Users] openser: general question
by Helmut Kuper 04 Dec '07

04 Dec '07

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hello, I'm quite unsure about openser's hangling of message processing. So can anybody answere following 2 questions please ? 1. When multiple messages come in, lets say 3 INVITEs. Will openser fork one child for each message, run the route script and terminate the child after that? Or will openser throw all 3 INVITEs at the same time into the route script? 2. If the 3 INVITEs share the same route script, are they handled sequentially? What happens to the AVPs and $var variables? Are they gonna mixed? regards Helmut -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iD8DBQFHVRWA4tZeNddg3dwRAkQZAJ9Ruy3kr2RzODDlm55uZ4Y6yZTcPACgrl+v qmOW524gE6vgsWNgOalpfW4= =oR4D -----END PGP SIGNATURE-----

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[OpenSER-Users] Napting interval
by Daniel 04 Dec '07

04 Dec '07

Hi all, what is the different between napting interval done by nathelper-module and the other ones done by mediaproxy-module ? Can I set both of them at the same time ? regards, daniel -- Daniel Grotti ________________________ e-mail : d.grotti(a)gmail.com

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[OpenSER-Users] Calls Between Registered Accounts
by VoIP Forums www.Go4Calls.com 04 Dec '07

04 Dec '07

Good day friends, I was trying to install Openser and Asterisk on same server. I need some configuration or information if anyone can point me. I need to forward only International call to the Asterisk but the same time if registered accounts of openser want to make call between them the can call each other without routing to asterisk. Could you please give us the right parameters of openser.cfg to route calls between openser accounts? Regards, www.Go4Calls.Com VoIP Forums _________________________________________________________________ Discover the new Windows Vista http://search.msn.com/results.aspx?q=windows+vista&mkt=en-US&form=QBRE

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[OpenSER-Users] invalid cseq for aor
by Gerson Matiolli 04 Dec '07

04 Dec '07

Hi, All I am with the OPENSER running some time without problems. Yesterday, he went not to complete any call, and the system had the following message log: ERROR:registry:update_contacts: invalid cseq for aor ERROR:registry:update_contacts: invalid cseq for aor ERROR:registry:update_contacts: invalid cseq for aor for all numbers Thanks

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[OpenSER-Users] Help with Setup
by Arun Kumar 04 Dec '07

04 Dec '07

Hi, I need to configure my ser / openser in such a way that these sites should be able to call each other : Site A -> 01113, 01114 Site B -> 02113, 02114 Site C -> 03113, 03114 User in Site A (Dial 02113 or 03113) --------> SER / OpenSER --------> User in Site B or Site C and they should be able to call within site : User in Site A (Call 114) ----------> SER / OpenSER ---------> User in Site A here 01, 02, 03 are my site code so site code is only needed when users want to call between sites. If they are calling within same site no need to dial site id. please advise and give some links. Thanks, arun

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[Serusers] SER data model discussion - developers please read
by X Z 04 Dec '07

04 Dec '07

Hi All, This is specifically for the SER/OpenSER developers, but I'm not a serdev list member so I'm posting here. I've been using SER since version 0.8.X and I'm still running 0.8.14production for my company PBX to this day. I was very excited as version 2 became a release candidate and I downloaded it for testing. I was pretty disappointed with one aspect of the new data model and I'm requesting that the developers consider a further revision on the data model. Basically, taking all fields out of the subscriber table like Last_name, first_name, email, timezone, rpid/asserted identity, etc, etc is not the greatest idea. It's a better idea from a database architecture and performance perspective to keep adding columns into that table for data that has a 1 to 1 relationship with a user, and that is common in > 90% of SER's use cases (i.e. corporate, carrier/VSP.) I would suggest adding voicemail_password, and maybe every other field that is being added into the default attributes script that I saw in CVS recently. If you already know what attributes a user has (and they have a 1 to 1 relationship), then its far better from a db performance perspective to keep these attributes in the user table. I know that the code becomes more complicated, but I think it may be a tradeoff worth discussing. See this discussion ( http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:1067808…) between Oracle users and Tom, (an Oracle engineer/architect.) The full text of this discussion is very informative and I highly recommend people read it through. Tom's conclusion is that the type of data model being discussed, and now being used in SER fails for all but the most trivial of applications. Maybe SER *by itself* qualifies as "trivial" from a database architect's perspective, but think about things like Asterisk integration, which is quite common. You quickly run into some very nasty queries . . . Please note that I am not a software developer nor a database engineer, just a user who reads a lot, so I'm open to being the ignorant one here, but I thought that this should be discussed among users and developers. Thanks for considering, Mahatma http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:1067808… The following is an excerpt from the above link: Here is a excerpt from my forthcoming book where I talk about this (and show you how ugly, hard and inefficient queries against your very flexible model will be) (2)Do not use Generic Data Models Frequently I see applications built on a generic data model for "maximum flexibility" or applications built in ways that prohibit performance. Many times - these are one in the same thing! For example, it is well known you can represent any object in a database using just four tables: Create table objects ( oid int primary key, name varchar2(255) ); Create table attributes ( attrId int primary key, attrName varchar2(255), datatype varchar2(25) ); Create table object_Attributes ( oid int, attrId int, value varchar2(4000), primary key(oid,attrId) ); Create table Links ( oid1 int, oid2 int, primary key (oid1, oid2) ); That's it - no more CREATE TABLE for me! I can fill the attributes table up with rows like this: insert into attributes values ( 1, 'DATE_OF_BIRTH', 'DATE' ); insert into attributes values ( 2, 'FIRST_NAME', 'STRING' ); insert into attributes values ( 3, 'LAST_NAME', 'STRING' ); commit; And now I'm ready to create a PERSON record: insert into objects values ( 1, 'PERSON' ); insert into object_Attributes values( 1, 1, '15-mar-1965' ); insert into object_Attributes values( 1, 2, 'Thomas' ); insert into object_Attributes values( 1, 3, 'Kyte' ); commit; insert into objects values ( 2, 'PERSON' ); insert into object_Attributes values( 2, 1, '21-oct-1968' ); insert into object_Attributes values( 2, 2, 'John' ); insert into object_Attributes values( 2, 3, 'Smith' ); commit; And since I'm good at SQL, I can even query this record up to get the FIRST_NAME and LAST_NAME of all PERSON records: ops$tkyte@ORA920> select max( decode(attrName, 'FIRST_NAME', value, null )) first_name, 2 max( decode( attrName, 'LAST_NAME', value, null ) ) last_name 3 from objects, object_attributes, attributes 4 where attributes.attrName in ( 'FIRST_NAME', 'LAST_NAME' ) 5 and object_attributes.attrId = attributes.attrId 6 and object_attributes.oid = objects.oid 7 and objects.name = 'PERSON' 8 group by objects.oid 9 / FIRST_NAME LAST_NAME -------------------- -------------------- Thomas Kyte John Smith Looks great, right? I mean, the developers don't have to create tables anymore, we can add columns at the drop of a hat (just requires an insert into the ATTRIBUTES table). The developers can do whatever they want and the DBA can't stop them. This is ultimate "flexibility". I've seen people try to build entire systems on this model. But, how does it perform? Miserably, terribly, horribly. A simple "select first_name, last_name from person" query is transformed into a 3-table join with aggregates and all. Further, if the attributes are "NULLABLE" - that is, there might not be a row in OBJECT_ATTRIBUTES for some attributes, you may have to outer join instead of just joining which in some cases can remove more optimal query plans from consideration. Writing queries might look pretty straightforward, but it's impossible to do in a performant fashion. For example, if we wanted to get everyone that was born in MARCH or has a LAST_NAME = 'SMITH', we could simply take the query from above and just wrap an inline view around that: ops$tkyte@ORA920> select * 2 from ( 3 select max(decode(attrName, 'FIRST_NAME', value, null)) first_name, 4 max(decode(attrName, 'LAST_NAME', value, null)) last_name, 5 max(decode(attrName, 'DATE_OF_BIRTH', value, null)) date_of_birth 6 from objects, object_attributes, attributes 7 where attributes.attrName in ( 'FIRST_NAME', 'LAST_NAME', 'DATE_OF_BIRTH' ) 8 and object_attributes.attrId = attributes.attrId 9 and object_attributes.oid = objects.oid 10 and objects.name = 'PERSON' 11 group by objects.oid 12 ) 13 where last_name = 'Smith' 14 or date_of_birth like '%-mar-%' 15 / FIRST_NAME LAST_NAME DATE_OF_BIRTH -------------------- -------------------- -------------------- Thomas Kyte 15-mar-1965 John Smith 21-oct-1968 So, it looks "easy" to query, but think about the performance! If you had a couple thousand OBJECT records, and a couple tens of thousands of OBJECT_ATTRIBUTES - Oracle would have to process the entire inner group by query first and then apply the WHERE clause. This is not a made up data model, one that I crafted just to make a point. This is an actual data model that I've seen people try to use. Their goal is ultimate flexibility. They don't know what OBJECTS they need, they don't know what ATTRIBUTES they will have. Well - that is what the database was written for in the first place: Oracle implemented this thing called SQL to define OBJECTS and ATTRIBUTES and lets you use SQL to query them. You are trying to put a generic layer on top of a generic layer - and it fails each and every time except for the most trivial of applications.

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Re: [OpenSER-Users] OpenSER Sending INVITE Twice!?
by Ovidiu Sas 03 Dec '07

03 Dec '07

Hi Douglas, You will need to upgrade to 1.2.2. This issue was fixed starting with 1.2.0. Regards, Ovidiu Sas On Dec 3, 2007 3:12 PM, Douglas Garstang <dougmig33(a)yahoo.com> wrote: > > Ok, I can accept that it might be a timeout since it doesn't happen every > single time. > 1/5s seems awefully short though. How can I increase this? I can't find > anything in the docs about increasing this timeout... > > Doug. > > > > ----- Original Message ---- > From: Ovidiu Sas <osas(a)voipembedded.com> > To: Tavis P. <tavis.lists(a)galaxytelecom.net> > Cc: users(a)openser.org > Sent: Monday, December 3, 2007 12:01:53 PM > Subject: Re: [OpenSER-Users] OpenSER Sending INVITE Twice!? > > Right, 1/5 is not 1/2 :) > > -ovi > > On Dec 3, 2007 10:10 AM, Tavis P. <tavis.lists(a)galaxytelecom.net> wrote: > > > > It may also be related to the timer accuracy of OpenSER 1.1 > > > > If the T1 interval is 500ms but OpenSER 1.1 doesn't support sub-second > > timer accuracy it is probable to see it retransmitting in situations where > > T1 hasn't been reached yet > > It shouldn't cause any problems though, just a few erroneous retransmits > > from time to time > > > > tavis > > > > Ovidiu Sas wrote: > > Hi Douglas, > > > > You posted this questionawhileago and by checkingthe archives > > Irealised that my answer was truncated somehow ... > > Here's the full answer: > > > > This is the way that is supposed to work. If nothing is received from > > upstream, the request is resent. > > >From the rfc3261: > > > > 17.1.1.1 Overview of INVITE Transaction > > > > The INVITE transaction consists of a three-way handshake. The client > > transaction sends an INVITE, the server transaction sends responses, > > and the client transaction sends an ACK. For unreliable transports > > (such as UDP), the client transaction retransmits requests at an > > interval that starts at T1 seconds and doubles after every > > retransmission. T1 is an estimate of the round-trip time (RTT), and > > it defaults to 500 ms. > > > > > > It seems that your upstream UAS is slowin sending out the 100 Trying > > and therefor openSER is resending out the INVITE. > > > > > > Regards, > > Ovidiu Sas > > > > On Dec 3, 2007 12:35 PM, Douglas Garstang <dougmig33(a)yahoo.com> wrote: > > > > > > I have an OpenSER 1.1 install here, and for some reason, OpenSER is > sending > > the INVITE message twice to the upstream host. > > > > Asterisk OpenSER Provider > > ----------------------------------------------- > > | ---INVITE---> | | > > | | ---INVITE---> | > > | | ---INVITE---> | > > | | <---TRYING--- | > > | | <---TRYING--- | > > > > The time difference between them is about 1/5 of a second. Nothing is > > received between the first and second INVITE's. > > > > Why is OpenSER doing this? > > > > I have xlog() statements everywhere in openser.cfg, and OpenSER is only > > logging ONE outgoing INVITE message, eventhough it's sending two. It is > > logging the multiple TRYING messages that come back however. > > > > OpenSER is not calling failure_route because nothing is logged in there. > > What could be going wrong? Why is it doing this? > > > > Doug. > > > > ________________________________ > > Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it > > now. > > _______________________________________________ > > Users mailing list > > Users(a)lists.openser.org > > http://lists.openser.org/cgi-bin/mailman/listinfo/users > > > > > > > > _______________________________________________ > > Users mailing list > > Users(a)lists.openser.org > > http://lists.openser.org/cgi-bin/mailman/listinfo/users > > > > > > > > > > _______________________________________________ > > Users mailing list > > Users(a)lists.openser.org > > http://lists.openser.org/cgi-bin/mailman/listinfo/users > > > > > > _______________________________________________ > Users mailing list > Users(a)lists.openser.org > http://lists.openser.org/cgi-bin/mailman/listinfo/users > > > ________________________________ > Get easy, one-click access to your favorites. Make Yahoo! your homepage.

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sr-users December 2007