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Re: [reSIProcate-users] [Fwd: reINVITE/BYE glare condition?]


I remember reading that one, and I just looked back at it.

In that case, DUM *received* a re-Invite, immediately followed by a BYE.
In my case, DUM *sends* out a re-INVITE, and then *recieves* a BYE very soon after... no response to the re-INVITE.
( The UAS below is DUM. I've had results like this with a couple of different UA's on the UAC side. )
Do you know what is supposed to happen in a situation like this? Should DUM do a CANCEL on the re-INVITE when the BYE comes in from the other side? 



Scott Godin wrote:


Hi Michael,
This sounds identical to an issue that was reported 2 weeks back on the mailing list. It looked like a DUM bug to me. I plan on fixing this when a get some spare time. In the meantime, the person that reported the issue, also posted a reasonable looking patch, you should check out the mailing list archives for this. 


    It looks like this:

    UAC                              UAS

         Invite         --->
         200 OK    <---
         ACK         --->

    some seconds pass by....

         Re-Invite ( with BlackHole )   <---
         BYE        -->     ( almost simultaneous with the re-invite
    above, oops! )
         Re-Invite ( with BlackHole )   <---  ( repeat )
         100 Trying      <---  ( response from uac to re-invite )
          BYE      --->
          100 Trying    <--- ( provisional for BYE from DUM )
           BYE      --->
          100 Trying    <--- ( provisional for BYE from DUM )
          BYE      --->
          100 Trying    <--- ( provisional for BYE from DUM )
          BYE      --->
          100 Trying    <--- ( provisional for BYE from DUM )
          BYE      --->
          100 Trying    <--- ( provisional for BYE from DUM )


    and thats it. The UAC never responds to my Re-invite, and DUM
    never does anything with the BYE.

    What is supposed to happen here?

    Am I suppsed to get some callback after a certain amount of time?
    My applications session variables never get a chance to clear
    themselves out when this happens, since I believe that DUM isn;t
    calling any of the callbacks in my InviteSessionHandler.

    Thanks in advance for any help you can offer.






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