[OpenSIPS-Users] OpenSIPS error Malformed Header/failed to generate a HBH ACK

[Liviu Chircu]

Hi Dimitry!

That errors suggests the "From" Header Field of the 400 negative reply 
is missing! Best way to continue from here is to perform a SIP trace on 
this scenario, so you can confirm this yourself before starting to fix it.

Liviu Chircu
OpenSIPS Developer
http://www.opensips-solutions.com

On 15.03.2016 14:48, Nagorny, Dimitry wrote:
>
> Good afternoon Ladies and Gentlemen,
>
> I’m trying to use OpenSIPS as a Border Controller between a PSTN and a 
> FreeSWITCH. The PSTN is sending all SIP-messages through a SIP-trunk.
>
> I got OpenSIPS working fine from PSTN through OpenSIPS to FreeSWITCH, 
> but the other way around (from FS over OpenSIPS to PSTN),  I’m getting 
> an error message I can’t solve. (Info: There are NO phones registered 
> with OpenSIPS or FreeSWITCH, they are all on the PSTN, I need OpenSIPS 
> only to guide traffic to either my FreeSWITCH mediaserver or tot he 
> Aus @ PBX.)
>
> As far as I can tell, when OpenSIPS opens up a new branch it is 
> changing internally the headers from the incoming SIP-message from 
> FreeSWITCH into a wrong format and after that it’s throwing two errors:
>
> -ERROR:tm:send_ack: failed to generate a HBH ACK if key HFs in reply 
> missing
> ERROR:tm:reply_received: failed to send ACK (local=no)
>
> oHere I looked at the relevant code but I can’t tell what it is trying 
> to do in the transaction module
>
> oAs well I couldn’t find info about the abbreviation „HBH“ or „HF“
>
> Additionally this piece of info:
>
> -… SIP/2.0 400 Bad Request..Warning: 399 192.168.1.30 "Malformed 
> headers : From " …
>
> oFrom this somehow I found out that it’s missing the “:“ after From
>
> Please see the attached files for more info.
> I would very much appreciate it if somebody could give me, at least, a 
> hint how I could fix the problem, because by now I googled these 
> problems for three days now w/o a solution. I can’t attach the full 
> debug, the mail list blocks the size of it (17KB…). I’ll attach it to 
> an answer.
>
> Thanks in advance for any help I can get!
>
> Very Respectfully
>
> *Dimitry Nagorny*
>
> Trainee
>
> robot5GmbH
>
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