[SR-Users] kamailio 4.0.3 - contact header in ACK

[Daniel-Constantin Mierla]

Hello,

On 11/28/13 5:58 PM, Adnan wrote:
> Hi,
>
>
> 1. After adding t_newtran() as shown below, some how this got fixed 
> i.e. ACK got routed.
>
> However, we are disputed in considering t_newtran() to have caused the 
> fix.
>
> if (is_method("ACK")) {
>                               if (t_check_trans()) {
>                                       t_relay();
>                                       exit;
>                               } else {
> * t_newtran(); #<<<<NEW ADD>>>>*
>                                       exit;
>                               }
>
I find that strange, end to end ACK does create any transaction anyhow. 
Still the sip trace is what can reveal where is the issue.

> 2. Is there a frequently used tool remove the private info. from the 
> snoop traces before sending in as debug info.
>
> One way to remove the info, is to convert snoop to text and then 
> replace all IPs and passwords using sed but I need something less time 
> consuming.

Converting to text and find/replace is the way typically just works, sed 
should do it quickly, another tool perhaps will end up in being another sed.

Daniel
>
> Br
> Adnan
>
>
> On Wed, Nov 27, 2013 at 11:30 PM, Daniel-Constantin Mierla 
> <miconda at gmail.com <mailto:miconda at gmail.com>> wrote:
>
>     For further clarification, the Contact header is not relevant at
>     all (so not used) for routing current request (no matter is ACK or
>     something else). No Contact never results in misrouting. As Alex
>     pointed, only a full sip trace can reveal the problem.
>
>     Cheers,
>     Daniel
>
>
>     On 11/27/13 8:31 PM, Alex Balashov wrote:
>>     The only way to diagnose this is to get a full packet capture. In
>>     all likelihood, there is a problem with the ACK. 4.0 does not, in
>>     principle, mishandle ACKs, no, but loose-routing and NAT problems
>>     related to their handling are not uncommon.
>>
>>
>>     Adnan <112linuxstockholm at gmail.com>
>>     <mailto:112linuxstockholm at gmail.com> wrote:
>>
>>         Hi,
>>
>>         We are migrating from our openser 1.4 to kamailio 4.0.3 and
>>         have run into a couple of issues. One of them is described
>>         below and we need to know if it is a known bug or not.
>>
>>         Kamailio receives an INVITE from a gateway and finally
>>         responds with 200 OK. Then an ACK is generated by the gateway
>>         towards the Kamailio that some how does not get relayed to
>>         the next hop.
>>
>>         The only special aspect here is that the ACK does not contain
>>         a Contact header. Is that something that could confuse
>>         kamailio and make it unable to relay?
>>
>>         According to SIP RFC, a contact header in ACK is not a must
>>         have. Our case is the one where ACK  is sent by the UAC after
>>         receiving a 200 OK final response. Everything else about the
>>         ACK looks OK e.g. ACK has a branch different from the the
>>         branch value in the UAC INVITE.
>>
>>         Is it a a known bug in 4.0.3?
>>
>>         In the configuration, we handle ACK as below:
>>
>>         if (is_method("ACK")) {
>>                                         if (t_check_trans()) {
>>           t_relay();
>>           exit;
>>                                         } else {
>>           exit;
>>                                         }
>>         Br
>>         Adnan
>>
>>         ------------------------------------------------------------------------
>>
>>         SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
>>         sr-users at lists.sip-router.org  <mailto:sr-users at lists.sip-router.org>
>>         http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>>
>>
>>     --
>>     Sent from my mobile, and thus lacking in the refinement one might
>>     expect from a fully fledged keyboard.
>>
>>     Alex Balashov - Principal
>>     Evariste Systems LLC
>>     235 E Ponce de Leon Ave
>>     Suite 106
>>     Decatur, GA 30030
>>     United States
>>     Tel: +1-678-954-0671 <tel:%2B1-678-954-0671>
>>     Web: http://www.evaristesys.com/, http://www.alexbalashov.com
>>
>>
>>     _______________________________________________
>>     SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing list
>>     sr-users at lists.sip-router.org  <mailto:sr-users at lists.sip-router.org>
>>     http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>
>     -- 
>     Daniel-Constantin Mierla -http://www.asipto.com
>     http://twitter.com/#!/miconda  <http://twitter.com/#%21/miconda>  -http://www.linkedin.com/in/miconda
>
>
>     _______________________________________________
>     SIP Express Router (SER) and Kamailio (OpenSER) - sr-users mailing
>     list
>     sr-users at lists.sip-router.org <mailto:sr-users at lists.sip-router.org>
>     http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-users
>
>
>
>
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-- 
Daniel-Constantin Mierla - http://www.asipto.com
http://twitter.com/#!/miconda - http://www.linkedin.com/in/miconda

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