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  1. #1
    Registered User
    Join Date
    Nov 2004
    Posts
    25

    How to send SIP RE-INVITE?

    Hello,

    We are developing an app based on the Series60 SIP 2.0 plugin.

    When the app receives an initial SIP INVITE message from another SIP endpoint via the SIP server, the app responds with a 200 OK. The endpoint then sends an ACK message back to our app. The call flow then proceeds with the app sending a RE-INVITE message (which is an INVITE on the same SIP dialog) to the original end-point however its unclear how to achieve this?

    Thanks,
    RE

  2. #2
    Super Contributor
    Join Date
    Apr 2003
    Location
    Czech Republic
    Posts
    915
    Hi,
    I'd say that it is not possible, but from your description it is not clear what you want to achieve. Could you elaborate little bit more deeply what is the reason for this and what should be the results? Maybe we can think about some different solution.

  3. #3
    Registered User
    Join Date
    Nov 2004
    Posts
    25

    How to send SIP RE-INVITE?

    Hello, thank you for your response,

    Typically, during a call set up using SIP, the sip re-invite is used to communicate changes in media capabilites. For example if video becomes available during a call, a re-invite is sent with the new SDP information.

    Our app acts in two modes:
    1. Organizer mode which establishes the SIP dialog using CSIPInviteDialogAssoc::NewL() and sends the original invite message to participants.
    2. Participant mode which receives the original invite sent by the Organizer.

    Our app has a requirement for the participant to re-invite the organizer.

    Thanks,
    Rob.

  4. #4
    Regular Contributor
    Join Date
    Nov 2004
    Location
    Mumbai - India
    Posts
    155
    I never did this. But what I got is :

    ......This is accomplished by sending a re-INVITE containing a new media description. This re-INVITE references the existing dialog so that the other party knows that it is to modify an existing session instead of establishing a
    new session......

    RFC 3261

    Suraab

  5. #5
    Registered User
    Join Date
    Nov 2004
    Posts
    25
    Hello,

    Correct.

    and the issue I have, using the Nokia SIP stack API, is how do you reference the existing dialog when the dialog has been created by another endpoint (the Organizer)?

    Thanks,
    Rob.

  6. #6
    Regular Contributor
    Join Date
    Nov 2004
    Location
    Mumbai - India
    Posts
    155
    It's very late but solution is perheps..

    In thread

    http://discussion.forum.nokia.com/fo...094#post126094

    //THE NEXT LINE IS VERY IMPORTANT AND ALMOST NOWHERE DOCUMENTED!!
    at client site
    iSIPInviteDialogAssoc=CSIPInviteDialogAssoc::NewL(*aTransaction);

    is solution.



    Suraab

  7. #7
    Registered User
    Join Date
    Nov 2004
    Posts
    25
    We have reolved this issue and you are correct. Thank you for our response.

  8. #8
    Registered User
    Join Date
    May 2003
    Posts
    187

    SIP ReInvite

    Hi,

    Thanks for the solution

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