[OpenSIPS-Users] Hung dialogs

[Ryan Revels]

Vlad,

Thanks. I will give this a shot.

Ryan

On Fri, Nov 11, 2011 at 9:50 AM, Vlad Paiu <vladpaiu at opensips.org> wrote:

> **
> Hello,
>
> Sorry Ryan, I might have went too fast through the PCAP and did not
> initially spot your actual problem.
>
> It seems that your problem is caused by the INVITE retransmission. When
> you reject the first INVITE you do it stateless-ly so the message does not
> ever reach TM level. When the retransmission comes, it is not absorbed by
> TM, so it is actually your retransmission that gets delivered to the other
> side.
>
> Please try to add a call to t_newtran() when starting to process the
> INVITEs to make sure that the TM is aware of them and can absorb
> retransmissions. This should fix your issue.
>
>
> Regards,
>
> Vlad Paiu
> OpenSIPS Developer
>
>
> On 11/11/2011 04:28 PM, Ryan Revels wrote:
>
> Vlad,
>
> I'm a little confused by your response. I attached a pcap that shows the
> ACK being received. I'm trying to understand why OpenSIPS would continue to
> process the call after it replies with a 486 and exits the script.
>
> I would really appreciate any help.
>
> Thanks,
> Ryan
>
>
> On Fri, Nov 4, 2011 at 5:37 AM, Vlad Paiu <vladpaiu at opensips.org> wrote:
>
>>  Hello,
>>
>> From the output of dlg_list, I can see that the ACK was never received by
>> OpenSIPS, so seems this is the source of your problem.
>>
>> You could try to set the dialog timeout to a lower value after the 200 OK
>> is received ( couple of seconds ), and increase it after the ACK is
>> received to a couple of hours.
>>
>> Regards,
>>
>> Vlad Paiu
>> OpenSIPS Developer
>>
>>
>> On 11/03/2011 10:36 PM, Ryan Revels wrote:
>>
>>  I've run into an issue where *very* rarely, dialogs will "hang", that
>> is, the dialog will continue to exist even though the call never connected.
>> In the example I managed to track down, the proxy should reject the call
>> (because a limit of concurrent calls has been reached) and at first, it
>> seems like it's going to... but then it sends a 100 Trying and continues to
>> route the call to the destination. From there, everything spirals and the
>> dialog doesn't die until it hits the global timeout.
>>
>>  The relevant portion of my script looks like:
>>
>>  # Check gateway calls total
>> if ($avp(custgwtotal_limit) != "0" && $avp(custgwtotal_limit) != NULL &&
>> $avp(custgwtotal_limit) != "")
>> {
>>    get_profile_size("custgwtotal","$rd","$avp(custgwtotal_count)");
>>    if (!$avp(custgwtotal_count) < $avp(custgwtotal_limit))
>>    {
>>       sl_send_reply("486","Endpoint Session Limit");
>>       exit;
>>    }
>> }
>>  set_dlg_profile("custgwtotal","$rd"); #count total calls to customer's
>> IP
>>
>>  I've attached a pcap example of what the signaling looks like when the
>> dialog hangs. For this example, the output in dlg_list looks like:
>>
>>  dialog::  hash=629:349156783
>>  state:: 3
>>  user_flags:: 0
>>  timestart:: 1320336333
>>  timeout:: 1320357957
>>  callid:: did2.139.1120741
>>  from_uri:: sip:16034299966 at 64.136.174.30
>>  to_uri:: sip:16038869119 at 184.106.218.8
>>  caller_tag:: 1ae26ee84c61df6b84baef371d2bf5e4
>>  caller_contact:: sip:184.106.219.203:5060;transport=udp
>>  callee_cseq:: 0
>>  caller_route_set::
>>  caller_bind_addr:: udp:184.106.218.8:5060
>>  callee_tag:: as58f4e19a
>>  callee_contact:: sip:16038869119 at 71.168.70.47
>>  caller_cseq:: 2
>>  callee_route_set::
>>  callee_bind_addr:: udp:184.106.218.8:5060
>>
>>  Any help would be appreciated.
>>
>>  Thanks,
>> Ryan
>>
>>
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