[OpenSIPS-Users] Failed INVITE tcp_send to UDP UACs

[Bogdan-Andrei Iancu]

Hi Brian,

opensipslist at encambio.com wrote:
>> the t_relay() function does server location discovery via DNS (for
>> domain voip.host.tld ).
>>
>> Based on NAPTR and SRV records, a TLS destination is chosen (this
>> selection also depends on the RURI - like if a specific SIP schema
>> is required, etc).
>>
>> So, your problem is why TLS was chosen or why TLS write failed ?
>>
>>     
> Your explanation sounds reasonable. The problem is that TLS writes
> and sometimes even reads are failing. I wrote about the NAPTR and
> SRV records, because I suspected that OpenSIPS was sending TCP
> (unencrypted) commands to a TLS connection or vise versa.
>   
I doubt it - you can check via tcpdump to see if traffic in encrypted or 
not.
> You mentioned in another email that this could be NAT related and
> I agree. It seems that you don't think there is some mismatch
> between TCP and TLS, maybe involving the NAPTR and SRV records.
>   
That is correct.
>   
>>> The same config worked well with OpenSER 1.3.X. Only when migrating
>>> to 1.6.0 do we see these errors. What could have changed?
>>>
>>>       
> But this is maybe a clue. It would seem that something in TLS
> writing has changed between these two versions, maybe fundementally?
>   
1.3 was doing infinite loop (for write and read), leading sometime to 
blocking.

Regards,
Bogdan


-- 
Bogdan-Andrei Iancu
www.voice-system.ro