Re: [SR-Users] AVPOPS / TM behavior

Once you know it you will find it :-)

http://www.kamailio.org/wiki/cookbooks/3.3.x/pseudovariables#avps

regards Klaus

On 07.08.2012 18:22, Brandon Armstead wrote:

Klaus,

Thank you for this detailed explanation.  This is essentially what I

figured was happening. I was able to use htable to work around it.

I guess however I am still confused as to where there is any public documentation on this specific bit. Had I've not been working with Kamailio for years I would think this would confuse others.

Let me know if it is somewhere else, otherwise I will add it to the Kamailio wiki.

Sincerely, Brandon Armstead

On Tue, Aug 7, 2012 at 2:32 AM, Klaus Darilion <klaus.mailinglists@pernau.at mailto:klaus.mailinglists@pernau.at> wrote:

AVPs are associated with the transaction. If you "spiral" a request
through the same proxy, then for the proxy it is a new transaction.
Thus, when processing the request a second time, there is a new
transaction and you do not have access to the AVPs of the previous
transaction.

Workarounds are:
- store data in SIP headers and retrieve it later (ugly)
- use htable module to store data during transaction 1 and retrieve
it during transaction 2. Therefore you need a known "key" which is
identical in this 2 transactions only (e.g. use "$ci$ft" as base for
the key).

regards
Klaus





On 07.08.2012 00:27, Brandon Armstead wrote:

    Hello,

         I am curious if there is any documentation on how AVP's
    processing
    works in the following scenario below.

    UAC 1 -> KAMAILIO -> KAMAILIO -> DEST

    It seems that AVP's I set between UAC 1 -> KAMAILIO are lost once I
    relay back to the same KAMAILIO proxy (self)?

    Is there any documentation on why or when this would occur?

    Is there a better way to handle such a scenario?  i.e. more dynamic
    internal routing, vs relaying to self.

    Thanks as always in advance!

    Sincerely,
    Brandon Armstead


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