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:b2...@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:b2...@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:1...@1.2.3.4->sip:b2...@1.2.3.4:5060

Is there something I need to add to my configuration that handles packets with "b2...@1.2.3.4" as the destination ($ru)?

Brett Woollum
br...@woollum.com


----- Original Message -----
From: "Brett Woollum" <br...@woollum.com>
To: "OpenSIPS users mailling list" <users@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:sa...@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:sa...@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
br...@woollum.com


----- Original Message -----
From: "Anca Vamanu" <a...@opensips.org>
To: users@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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