Re: Ack not arriving

Gal,

Please update your sources from NIST CVS (not java.net), in particular 
EventScanner.java
It was tricky, but the debug log you provided was excellent. It should work 
now

Thanks,

jeroen

PS Please tell 3COM to fix their equipment 
(3Com/VCX/7210/IP/CallProcessor/v7.0.18)

----- Original Message ----- 
From: "Jeroen Van Bemmel" <[email protected]>
To: "M. Rangnathan" <[email protected]>; "Gal Ben-Yair" <[email protected]>
Cc: <[email protected]>
Sent: Tuesday, July 11, 2006 5:52 PM
Subject: RE: [nist-sip] Ack not arriving


> Ranga,
>
> ACK for 2xx should have different branch, rest should have same branch. 
> Since the INVITE ST should be destroyed upon 2xx, it should not block the 
> ACK even when the sender uses a wrong branch
>
> This is a good test case: the ST is kept alive to catch retransmitted 
> INVITEs, but after 2xx it should not block ACKs
>
> Regard,
>
> Jeroen
>
> -----Oorspronkelijk bericht -----
> Van: "M. Rangnathan" <[email protected]>
> Aan: "Gal Ben-Yair" <[email protected]>
> CC: [email protected]
> Verzonden: 11-7-06 16:36
> Onderwerp: Re: [nist-sip] Ack not arriving
>
> Gal,
>
> Yes the ACK must have a different Branch ID. Otherwise, it winds up
> matching the INVITE client transaction and since that transaction is
> complete, it gets dropped.  One can gete around this I suppose as there
> are a lot of buggy clients around that dont do this but I fear other
> things will start breaking. Perhaps I will make this a  stack
> configurable property that allows such erroneous ACKs through. I will
> get around to this hack in a few days. Any comments on this Jeroen?
> Possible gotchas?
>
> Ranga
>
>
> Gal Ben-Yair wrote:
>
>>Hi Ranga,
>>
>>Thanks for the help.
>>Unfortunately, the ACK arrives from an external source not under my 
>>control.
>>I receive an INVITE, reply with OK and receive the ACK.
>>So you are saying that the ACK MUST have a different branch id than that 
>>of
>>the INVITE? Is there no way around this?
>>
>>Thanks,
>> Gal
>
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