[SR-Users] Drop calls with response 200 without previous 180/183 reponses

[Julien Chavanton]

Indeed, the call must be disconnected properly.
I would not rewrite the code unless absolutely necessary to avoid edge
cases.
Kamailio can do some in the middle UAC tasks, in this case maybe you could
look at :
dialog module dlg_bye(side)

On Mon, Oct 5, 2020 at 6:05 AM Valter Nogueira <valter at fastway.com.br>
wrote:

> Thank you people. It seems an easy approach using htable.
>
> I was wondering that this is not compliant with RFC 3261, since a proxy
> should not change sip responses.
>
> In fact not only I should change the sip response but I should send a BYE
> on behalf of the UAC. It seems like a B2BUA
>
>
> Em sáb, 3 de out de 2020 12:45, David Villasmil <
> david.villasmil.work at gmail.com> escreveu:
>
>> Kamailio is so cool, you could even do it without the dialog module. You
>> could simply use a hash table (htable module) and when/if a 183/180 is
>> received store the callid in the table (with an expiration). Anytime a 200
>> is received check the table (it’s in memory, so really fast), if not found,
>> reject.
>> Super simple.
>>
>>
>> On Sat, 3 Oct 2020 at 13:51, Valentin Christoph <
>> Christoph.Valentin at kontron.com> wrote:
>>
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>>> I am not quite sure, but I would try to store a long-term flag with the
>>> help of the dialog module.
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>>> [...]The dialog module provides dialog awareness for the Kamailio proxy.
>>> It's functionality is to keep track of the current dialogs, to offer
>>> information about them (e.g. how many dialogs are active), and to manage
>>> various characteristics of dialogs. The module
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>>> exports several functions that can be used directly from the
>>> configuration route script as well as functions for the RPC interface. [...]
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>>> [...]10.6. $dlg_var(key)
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>>> This is a read/write variable that can be used to store custom values
>>> assigned with a dialog (e.g. the URI of a billing-server, an assigned
>>> emergency-server). This pseudo-variable will be available only for
>>> subsequential requests after doing loose_route().
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>>> Note: You will receive "NULL", if there is no dialog for this
>>> request.[...]
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>>> Hint: ACK is a subsequential request
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>>> Anyway, I am wondering if your approach would be compliant to RFC 3261.
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>>> KR
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>>> ------------------------------
>>>
>>>
>>> *Von:* sr-users <sr-users-bounces at lists.kamailio.org> im Auftrag von
>>> Valter Nogueira <valter at fastway.com.br>
>>>
>>>
>>> *Gesendet:* Freitag, 2. Oktober 2020 17:01
>>>
>>>
>>> *An:* Kamailio (SER) - Users Mailing List <sr-users at lists.kamailio.org>
>>>
>>>
>>> *Betreff:* [SR-Users] Drop calls with response 200 without previous
>>> 180/183 reponses
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>>> I would like to use Kamailio to drop every call that is answered with no
>>> previous 180 / 183 responses or with 180 / 183 responses with no media
>>> attached (no SDP?).
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>>> Is it possible? How could I accomplish this?
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>>> Thanks,
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>>> Valter
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>>> _______________________________________________
>>>
>>> Kamailio (SER) - Users Mailing List
>>>
>>> sr-users at lists.kamailio.org
>>>
>>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>>
>>> --
>> Regards,
>>
>> David Villasmil
>> email: david.villasmil.work at gmail.com
>> phone: +34669448337
>> _______________________________________________
>> Kamailio (SER) - Users Mailing List
>> sr-users at lists.kamailio.org
>> https://lists.kamailio.org/cgi-bin/mailman/listinfo/sr-users
>>
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