[OpenSIPS-Users] 477 send failed with TCP

[Bogdan-Andrei Iancu]

Hi Anshuman,

for such call, could you check if before sending the BYE (or any other 
in-dialog request) the TCP connection is still up (check with netstat) - 
it may be the case where the TCP conn (opened by INVITE) is terminated 
and opensips cannot open a connection behind NAT back to the client.

Regards,
Bogdan

Anshuman S. Rawat wrote:
> Thanks Bogdan. That fixed most of the problems but not all.
>
> I have a scenario where I make calls without registering (transport is 
> TCP) so the contact in INVITE carries local/private IP address. 
> Result: I cannot receive in-dailog requests after call in setup. It 
> tried to fix this by doing this -
>
> if (method == INVITE) {
>                        # Required for TCP - Anshuman
>                        xlog("L_INFO", "INVITE: Check for NAT");
>                        if (nat_uac_test("1")) {
>                                xlog("L_INFO", "NAT: FIXING CONTACT in 
> INVITE");
>                                fix_nated_contact();
>                        };
>                };
>
> This is followed by processing by the lcr module  -
>
> if ((method == INVITE) && !(to_uri=~"parallel at .+")){
>                        # do lcr
>                       # xlog("Message :$tu");
>                        if (!load_contacts()){
>                                sl_send_reply("500","Unable to load 
> contacts");
>                                exit;
>                        }else{
>                                if (next_contacts()){
>                                        t_on_failure("1");
>                                }#else{
>                                #       sl_send_reply("404","Not found ");
>                                #       exit;
>                        #       }
>                        }
>                        append_hf("P-hint: lcr applied\r\n");
>
>                }else{
>                        append_hf("P-hint: usrloc applied\r\n");
>                }
>
>
> The above does not fix the 'Contact' header in the INVITE (i.e. 
> Contact still carries private IP address).
>
> Can anyone help me to identify what's wrong with this picture?
>
> Regards,
> Anshuman
>
>
> ----- Original Message ----- From: "Bogdan-Andrei Iancu" 
> <bogdan at voice-system.ro>
> To: "OpenSIPS users mailling list" <users at lists.opensips.org>
> Sent: Thursday, December 09, 2010 5:30 PM
> Subject: Re: [OpenSIPS-Users] 477 send failed with TCP
>
>
>> Hi Anshuman,
>>
>> do "fix_nated_register()" at registration time (before save("location"))
>> if uac_nat_test() function returns true (if nat was detected) - see the
>> nathelper module for more details:
>>       http://www.opensips.org/html/docs/modules/1.6.x/nathelper.html
>>
>> Regards,
>> Bogdan
>>
>> Anshuman S. Rawat wrote:
>>> Hi,
>>>
>>> I am trying to use TCP on OpenSIPS 1.6 (with PJSIP as client). Client
>>> successfully registers and sends keep-alives to keep the TCP
>>> connection open. However, all call attempts (or any other request)
>>> fail with a '477 Send Failed'. The logs show this -
>>>
>>> Dec  8 06:58:18 ip-208-109-177-46 /usr/local/sbin/opensips[15463]:
>>> ERROR:core:tcp_blocking_connect: timeout 10 s elapsed from 10 s
>>> Dec  8 06:58:18 ip-208-109-177-46 /usr/local/sbin/opensips[15463]:
>>> ERROR:core:tcpconn_connect: tcp_blocking_connect failed
>>> Dec  8 06:58:18 ip-208-109-177-46 /usr/local/sbin/opensips[15463]:
>>> ERROR:core:tcp_send: connect failed
>>> Dec  8 06:58:18 ip-208-109-177-46 /usr/local/sbin/opensips[15463]:
>>> ERROR:tm:msg_send: tcp_send failed
>>>
>>> Client is behind a NAT so registers with contact containing the
>>> private IP address. It seems that OpenSIPS is trying to connect to the
>>> private IP address contained in the REGISTER request rather than
>>> reusing the connection the request arrived on.
>>>
>>> Is this a bug? Or is there a way to configure it to use the
>>> established connection?
>>>
>>> Thanks,
>>> Anshuman
>>>
>>> ------------------------------------------------------------------------ 
>>>
>>>
>>> _______________________________________________
>>> Users mailing list
>>> Users at lists.opensips.org
>>> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>>>
>>
>>
>> -- 
>> Bogdan-Andrei Iancu
>> OpenSIPS Bootcamp
>> 15 - 19 November 2010, Edison, New Jersey, USA
>> www.voice-system.ro
>>
>>
>> _______________________________________________
>> Users mailing list
>> Users at lists.opensips.org
>> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>
>
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-- 
Bogdan-Andrei Iancu
OpenSIPS Event - expo, conf, social, bootcamp
2 - 4 February 2011, ITExpo, Miami,  USA
www.voice-system.ro