Re: Via Header not Required in Register request!

Hi  Jagadeesh,
                          Why is Via not required ?
 it is also a  mandatory header in SIP Messages.

Do you have any particular reason for not including it ?

All Response routing in SIP is based on the Via header , i feel you
should not really try to avoid it, and break SIP :-( .

Cheers.
Simith





On 7/10/06, M. Rangnathan <[email protected]> wrote:
> Jagadeesh Kannan Jayapal wrote:
>
> >Hi,
> >
> >Thank you very much for your help. I successfully created to and from
> >header with parameters.
> >
> >Just a short intro, I am master thesis student trying to implement SIP
> >based
> >P2P application for mobile devices. As I am the beginner for both SIP
> >and P2P it would be of great help if this group could clarify my doubts
> >in future as well.
> >
> >I'm trying to construct a register request without a via header. I
> >think, there is no need for a via header in a register request.
> >
> >
>
> Jagadessh,
>
> Via header is mandatory for all requests. If you dont add one and you
> use a transaction to send a request, the stack will add a default via
> header using a listening point of the provider to populate it. Via is
> used to respond to requests and therefore it is required for all
> requests (register included). If you really really want to send a
> request without a Via, you can send it statelessly but I dont know why
> you would want to deliberately send out an invalid request unless you
> are building a tester.
>
>  Please do take a look at RFC 3261 (required reading for JAIN-SIP).
> JAIN-SIP is simply a low level API for RFC 3261 and related RFCs.
>
>
>
> Good luck on your thesis.  Its a good topic.
>
> Ranga
>
>
> >My problem is, that all of the four createRequest() methods need a Via
> >(List) parameter. So I created any empty ArrayList and passed to
> >The request. The request is successfully created without the param
> >
> >But,
> >
> >Shootist listener = this;
> >listener.inviteTid = sipProvider.getNewClientTransaction(request);
> >
> >adding the Via Header to the request. I don't need the Via header in P2P
> >as there
> >exists no special proxy or servers.
> >
> >Please clarify my doubt.
> >
> >Thank you in advance
> >
> >
> >-----Original Message-----
> >From: SiM [mailto:[email protected]]
> >Sent: Samstag, 8. Juli 2006 10:32
> >To: Jagadeesh Kannan Jayapal
> >Cc: [email protected]
> >Subject: Re: Adding param to header
> >
> >Hi Jagadeesh,
> >                         Use the setParameter API , on your From or To
> >Header, you will get what you want, if you use it on the SIP URI, you
> >will get the name = value; parameter as a part of the SIP URI itself ,
> >i believe u need it on the From or To header, so use the setParameter
> >API wherever you want.
> >
> >All the best, and one more thing , there is documentation for all the
> >API's , if you look up that, you can learn a lot of things you do not
> >know :-) .
> >
> >Cheers.
> >Simith
> >
> >
> >
> >
> >On 7/7/06, Jagadeesh Kannan Jayapal <[email protected]> wrote:
> >
> >
> >>HI all,
> >>
> >>
> >>
> >>I need to create a header that looks like this;
> >>
> >>
> >>
> >>From: sip:[email protected];user=node;alg=rsa-shal1;overlay=chat
> >>
> >>
> >>
> >>
> >>
> >>I used the following code to create the header; but not sure how to
> >>
> >>
> >add
> >
> >
> >>parameters to the created header??
> >>
> >>Does Jain-Sip support doing so?
> >>
> >>
> >>
> >>SipURI fromAddress = addressFactory.createSipURI("7", "10.0.0.7");
> >>
> >>Address fromNameAddress = addressFactory.createAddress(fromAddress);
> >>
> >>
> >>
> >
> >_______________________________________________
> >nist-sip mailing list
> >[email protected]
> >http://www-x.antd.nist.gov/mailman/listinfo/nist-sip
> >
> >
> >
>
>
> --
> M. Ranganathan
>
> Advanced Networking Technologies Division,
> National Institute of Standards and Technology (NIST),
> 100 Bureau Drive, Stop 8920, Gaithersburg, MD 20899.
> tel:301 975 3664 , fax:301 590 0932 http://w3.antd.nist.gov/
> Advanced Networking Technologies For the People!
>
>
> _______________________________________________
> nist-sip mailing list
> [email protected]
> http://www-x.antd.nist.gov/mailman/listinfo/nist-sip
>