[OpenSIPS-Users] handling a 422

[Jeff Pyle]

Right.  That was my fear.  In my case the UAC knows nothing of session
timers.  Its UAS (Opensips) adds the SST headers and relays the request.  If
the far end replies with a 422, by default Opensips will relay the 422 to
the UAC who, well, won't know what to do with it.

It just doesn't seem fair to slap the UAC with a 422 it doesn't know how to
handle.

See what I mean?


- Jeff



On 8/18/09 9:10 AM, "Alex Balashov" <abalashov at evaristesys.com> wrote:

> The SST module is designed for a scenario in which the proxy serves as
> the endpoint of the SST negotiation.  Otherwise, SST is up to the UA
> endpoints to negotiate amongst themselves.  So, SST does not deal with a
> situation in which the proxy *receives* a 422;  it only equips the proxy
> to *send* a 422 if the Min-SE value from the request initiator does not
> meet *its* desiderata.
> 
> Jeff Pyle wrote:
> 
>> It seems very strange to me to have to manually manipulate headers that an
>> Opensips module added in the first place.  Seems like bad things could
>> happen if the modules expects them to be there with certain values and they
>> have different values or gone altogether.  If these headers are added in the
>> request route does the same rule apply as with append_hf(), that is, they
>> cannot be removed?
>> 
>> The whole thing just seems odd.
>> 
>> 
>> - Jeff
>> 
>> 
>> 
>> On 8/18/09 9:01 AM, "Alex Balashov" <abalashov at evaristesys.com> wrote:
>> 
>>> If I'm understanding the documentation correctly, you'd probably have to
>>> do this with manual header manipulation.
>>> 
>>> Jeff Pyle wrote:
>>> 
>>>> On 8/18/09 8:51 AM, "Alex Balashov" <abalashov at evaristesys.com> wrote:
>>>> 
>>>>> Sure, use a failure route and append_branch().
>>>> Ok, but how do I adjust the timer value so it doesn't get 422'd again?  Or
>>>> is this handled automatically?  The SST module documentation doesn't appear
>>>> to cover this.
>>>> 
>>>> 
>>>> 
>>>> - Jeff
>>>> 
>>>> 
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>> 
>> 
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