[OpenSIPS-Users] B2BUA Transfers Intermittently Working/Not Working (Bug?)

[Anca Vamanu]

Hi Brett,

No, you needn't add anything else in your configuration file except for 
the b2b_init_request for the initial Invite and the B2BUA should know to 
handle the REFER that comes inside that dialog. What happens is the the 
B2BUA does not find a matching dialog for that REFER message .. I don't 
know why that is. I will examine the traces you posted and try to 
reproduce this in the following days and let you know.

Regards,

-- 
Anca Vamanu
www.voice-system.ro


On 10/19/2010 09:05 AM, Brett Woollum wrote:
> Hello again Anca,
>
> I've done more debugging, and I've found that the REFER packets are 
> all targeting my B2BUA address and getting a 404 response. It seems to 
> still be working, but I'm wondering if this is what is causing the 
> problem after the 2nd transfer.
>
> In my log at http://www.woollum.com/temp/opensips_trace.html, you can 
> see the 404 Not Found's occurring at packet 9177. This one in 
> particular is generated for the packet above it (9175) that has 
> "sip:b2bua at 1.2.3.4" in the header of the packet.
>
> I've configured my B2BUA module with this entry:
> modparam("b2b_entities", "server_address", "sip:b2bua at 1.2.3.4:5060")
>
> and this is the config file that is creating the errors:
> if (uri==myself) {
>
>     if (method=="REGISTER") {
>       save("location");
>       exit;
>     };
>
>     # native SIP destinations are handled using our USRLOC DB
>     if (!lookup("location")) {
> xlog("USRLOC LOOKUP: ERROR 404 - NOT FOUND $fu->$ru");
>       sl_send_reply("404", "Not Found");
>       exit;
>     };
>     append_hf("P-hint: usrloc applied\r\n");
>   };
>
> And this is what is generated in the OpenSIPS log:
> Oct 18 22:56:42 sip01 /usr/local/sbin/opensips[4425]: USRLOC LOOKUP: 
> ERROR 404 - NOT FOUND sip:1000 at 1.2.3.4->sip:b2bua at 1.2.3.4:5060
>
> Is there something I need to add to my configuration that handles 
> packets with "b2bua at 1.2.3.4" as the destination ($ru)?
>
> Brett Woollum
> Brett at Woollum.com
>
>
> ----- Original Message -----
> From: "Brett Woollum" <brett at woollum.com>
> To: "OpenSIPS users mailling list" <users at lists.opensips.org>
> Sent: Monday, October 18, 2010 5:09:34 PM GMT -08:00 US/Canada Pacific
> Subject: Re: [OpenSIPS-Users] B2BUA Transfers Intermittently 
> Working/Not Working (Bug?)
>
> Hi Anca,
>
> I set debug=6 but it does not appear to print any more detailed 
> information to my log (/var/log/messages).
>
> I reviewed the sip trace I posted at 
> http://www.woollum.com/temp/opensips_trace.html and I still cannot 
> find any packets that are missing the header. The error log I posted 
> at http://www.woollum.com/temp/opensips.txt says that the To field, 
> From field, and RR field could not be parsed. It seems as though the 
> B2BUA module tried to open a new leg but didn't send the information 
> along? Does that make sense?
>  From the log earlier:
> Oct 12 19:34:16 sip01 /usr/local/sbin/opensips[5167]: ERROR:core:parse_to: unexpected char [<] in status 5:<<<>>  .
> Oct 12 19:34:16 sip01 /usr/local/sbin/opensips[5167]: ERROR:core:parse_from_header: bad from header
> Oct 12 19:34:16 sip01 /usr/local/sbin/opensips[5167]: ERROR:b2b_entities:b2b_prescript_f: cannot parse From header
> Oct 12 19:34:16 sip01 /usr/local/sbin/opensips[5167]: ERROR:core:parse_to: unexpected char [<] in status 5:<<<>>  .
> Oct 12 19:34:16 sip01 /usr/local/sbin/opensips[5167]: ERROR:core:parse_from_header: bad from header
> Oct 12 19:34:16 sip01 /usr/local/sbin/opensips[5167]: ERROR:core:pv_get_from_attr: cannot parse From header
> Oct 12 19:34:16 sip01 /usr/local/sbin/opensips[5167]: ROUTE STARTING INVITE<null>  sip:sales at 1.2.3.4
> Oct 12 19:34:16 sip01 /usr/local/sbin/opensips[5167]: ERROR:core:parse_to: unexpected char [<] in status 5:<<<>>  .
> Oct 12 19:34:16 sip01 /usr/local/sbin/opensips[5167]: ERROR:core:parse_from_header: bad from header
> Oct 12 19:34:16 sip01 /usr/local/sbin/opensips[5167]: ERROR:rr:record_route: From parsing failed
> Oct 12 19:34:16 sip01 /usr/local/sbin/opensips[5167]: ERROR:core:parse_to: unexpected char [<] in status 5:<<<>>  .
> Oct 12 19:34:16 sip01 /usr/local/sbin/opensips[5167]: ERROR:core:parse_from_header: bad from header
> Oct 12 19:34:16 sip01 /usr/local/sbin/opensips[5167]: ERROR:tm:new_t: no valid From in INVITE
> Oct 12 19:34:16 sip01 /usr/local/sbin/opensips[5167]: ERROR:tm:t_newtran: new_t failed
> Oct 12 19:34:16 sip01 /usr/local/sbin/opensips[5167]: ERROR:core:parse_to: unexpected char [<] in status 5:<<<>>  .
> Oct 12 19:34:16 sip01 /usr/local/sbin/opensips[5172]: ERROR:core:parse_to: unexpected char [<] in status 5:<<<>>  .
> Oct 12 19:34:16 sip01 /usr/local/sbin/opensips[5167]: ERROR:core:parse_from_header: bad from header
> Oct 12 19:34:16 sip01 /usr/local/sbin/opensips[5172]: ERROR:core:parse_from_header: bad from header
> Oct 12 19:34:16 sip01 /usr/local/sbin/opensips[5167]: ERROR:core:pv_get_from_attr: cannot parse From header
> Oct 12 19:34:16 sip01 /usr/local/sbin/opensips[5172]: ERROR:b2b_entities:b2b_tm_cback: cannot parse From header
> Oct 12 19:34:16 sip01 /usr/local/sbin/opensips[5167]: ROUTE 8 ENDING INVITE<null>  sip:sales at 10.20.1.225:5062
> Oct 12 19:34:17 sip01 /usr/local/sbin/opensips[5168]: ERROR:b2b_entities:b2b_prescript_f: No dialog found, callid= [B2B.50.3250981], method=REFER
> Brett Woollum
> Brett at Woollum.com
>
>
> ----- Original Message -----
> From: "Anca Vamanu" <anca at opensips.org>
> To: users at lists.opensips.org
> Sent: Thursday, October 14, 2010 12:45:19 AM GMT -08:00 US/Canada Pacific
> Subject: Re: [OpenSIPS-Users] B2BUA Transfers Intermittently 
> Working/Not Working (Bug?)
>
> Hi Brett,
>
> You need to run a network trace and catch the message for which you 
> get this error:
>
> ERROR:core:parse_to: unexpected char [<] in status 5: <<<>>
>
> You can run opensips in debug mode ( set 'debug=6' ) to see info from 
> the message and be able to find it in the network trace.
>
> >From the logs it seems that a message ( possibly REFER ) has a bad 
> From header and OpenSIPS is not able to process right.
>
> Regards,
> -- 
> Anca Vamanu
> www.voice-system.ro
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