Hi Daniel,

 

I have it commented out currently because neither seem to be working. The packet capture however was taken with drop uncommented and without the t_cancel_branches if statement. t_load_contacts was also commented out to avoid hitting the unable to load contact error.

 

Regards,

 

John Petrini

 

 

From: Daniel-Constantin Mierla
Sent: Monday, July 4, 2016 9:38 AM
To: John Petrini
Cc: Kamailio (SER) - Users Mailing List
Subject: Re: [SR-Users] (no subject)

 

Hello,

in the new email, the t_load_contacts() and drop are commented.

Is it how you have them in the config or again some formatting issue?

Cheers,
Daniel

On 04/07/16 15:13, John Petrini wrote:

Hi Daniel,

 

I made a mistake with my formatting when I pasted here. I am calling append_branch() before t_load_contacts. I've attached a view of the entire route including where I was using drop; below. Also a packet capture that shows Kamailio forwarding the reply from the cnam provider back to the phone. I've discovered t_cancel_branches("this") and that seems to be doing the job of killing the second branch as well as the reply to the phone.

 

My main issue right now is serializing the branches, append_branch creates an additional branch but t_load_contacts fails. I've tried appending multiple branches and also using seturi to replicate the documentation as closely as possible with no luck.

 

route[CNAM_DIPS] {

  if ($avp(direction) == "in") {

    t_on_branch("CNAM_DIPS");

    t_on_reply("CNAM_DIPS");

    t_on_failure("CNAM_DIPS");

    $var(reply_count) = 0;

    append_branch("sip:8888888888@222.22.222.22:5060;trans-type=5", "0.5");

    #t_load_contacts();

    t_next_contacts();

    t_relay();

    break;

  }

}

 

branch_route[CNAM_DIPS] {

  $var(modified_from) = "sip:" + $fU + "@sip.core.com";

  uac_replace_from("$var(modified_from)");

}

 

onreply_route[CNAM_DIPS] {

  $var(reply_count) = $var(reply_count) + 1;

  if (t_check_status("380")) {

    $avp(cnam) = $(hdr(P-Asserted-Identity){nameaddr.name});

  } else {

      xlog("L_ERROR", "INFO: Received bad reply (on_reply_route[CNAM_DIPS]):"); 

  };

  if ($var(reply_count) = 1) {

    t_cancel_branches("this");

  }

  #drop;

}

 

failure_route[CNAM_DIPS] {

  if (!t_next_contacts()) {

    xlog("L_ERR", "ERROR: Gateway failure (failure_route[CNAM_DIPS]): Failed to ship call");

    exit;

  } else {

      t_next_contacts();

      t_relay();

  };

}

 

 

Packet capture using drop in the on_reply route rather than t_cancel_branches("this"):

 

U 2016/07/04 08:46:41.223295 44.444.4.444:5060 -> 333.33.33.3:5060

Via: SIP/2.0/UDP 44.444.4.444:5060;branch=z9hG4bK04Bef9112d99372eace.

From: "UNKNOWN" <sip:+13333333333@44.444.4.444;isup-oli=62>;tag=gK046fcff6.

CSeq: 468700 INVITE.

Max-Forwards: 70.

Allow: INVITE,ACK,CANCEL,BYE,OPTIONS.

Accept: application/sdp.

P-Asserted-Identity: "UNKNOWN" <sip:+13333333333@44.444.4.444:5060>.

Supported: replaces.

Content-Length:   281.

Content-Disposition: session; handling=required.

Content-Type: application/sdp.

.

v=0.

o=Sonus_UAC 807784 731434 IN IP4 44.444.4.444.

s=SIP Media Capabilities.

c=IN IP4 55.555.5.55.

t=0 0.

m=audio 54018 RTP/AVP 0 18 101.

a=rtpmap:0 PCMU/8000.

a=rtpmap:18 G729/8000.

a=fmtp:18 annexb=no.

a=rtpmap:101 telephone-event/8000.

a=fmtp:101 0-15.

a=sendrecv.

a=ptime:20.

 

 

U 2016/07/04 08:46:41.230033 333.33.33.3:5060 -> 44.444.4.444:5060

SIP/2.0 100 trying -- your call is important to us.

Via: SIP/2.0/UDP 44.444.4.444:5060;branch=z9hG4bK04Bef9112d99372eace.

From: "UNKNOWN" <sip:+13333333333@44.444.4.444;isup-oli=62>;tag=gK046fcff6.

CSeq: 468700 INVITE.

Server: kamailio (4.2.7 (x86_64/linux)).

Content-Length: 0.

.

 

 

U 2016/07/04 08:46:41.234143 333.33.33.3:5060 -> 222.22.222.22:5060

Via: SIP/2.0/UDP 333.33.33.3;branch=z9hG4bK8ac3.daa229dcb24f16332fa5a21927e9a72f.0.

Via: SIP/2.0/UDP 44.444.4.444:5060;branch=z9hG4bK04Bef9112d99372eace.

From: "UNKNOWN" <sip:+13333333333@sip.core.com>;tag=gK046fcff6.

CSeq: 468700 INVITE.

Max-Forwards: 69.

Allow: INVITE,ACK,CANCEL,BYE,OPTIONS.

Accept: application/sdp.

P-Asserted-Identity: "UNKNOWN" <sip:+13333333333@44.444.4.444:5060>.

Supported: replaces.

Content-Length:   281.

Content-Disposition: session; handling=required.

Content-Type: application/sdp.

P-hint: branch_route CNAM_DIPS.

.

v=0.

o=Sonus_UAC 807784 731434 IN IP4 44.444.4.444.

s=SIP Media Capabilities.

c=IN IP4 55.555.5.55.

t=0 0.

m=audio 54018 RTP/AVP 0 18 101.

a=rtpmap:0 PCMU/8000.

a=rtpmap:18 G729/8000.

a=fmtp:18 annexb=no.

a=rtpmap:101 telephone-event/8000.

a=fmtp:101 0-15.

a=sendrecv.

a=ptime:20.

 

 

U 2016/07/04 08:46:41.367868 222.22.222.22:5060 -> 333.33.33.3:5060

SIP/2.0 380 cnam lookup.

Via: SIP/2.0/UDP 333.33.33.3;branch=z9hG4bK8ac3.daa229dcb24f16332fa5a21927e9a72f.0.

Via: SIP/2.0/UDP 44.444.4.444:5060;branch=z9hG4bK04Bef9112d99372eace.

From: "UNKNOWN" <sip:+13333333333@sip.core.com>;tag=gK046fcff6.

To:  <sip:2222222222@core.com>;tag=CNAM-16688-1467636671937.

CSeq: 468700 INVITE.

Contact: "CNAM" <sip:cnam_gw@10.212.16.30>; transport=udp.

Max-Forwards: 10.

P-Asserted-Identity: "Unavailable" <sip:+13333333333@sip.core.com>.

Content-Length: 0.

.

 

 

U 2016/07/04 08:46:41.368421 333.33.33.3:5060 -> 222.22.222.22:5060

Via: SIP/2.0/UDP 333.33.33.3;branch=z9hG4bK8ac3.daa229dcb24f16332fa5a21927e9a72f.0.

From: "UNKNOWN" <sip:+13333333333@sip.core.com>;tag=gK046fcff6.

To:  <sip:2222222222@core.com>;tag=CNAM-16688-1467636671937.

CSeq: 468700 ACK.

Max-Forwards: 69.

Content-Length: 0.

.

 

 

U 2016/07/04 08:46:44.227076 333.33.33.3:5060 -> 44.444.4.444:5060

SIP/2.0 380 cnam lookup.

Via: SIP/2.0/UDP 44.444.4.444:5060;branch=z9hG4bK04Bef9112d99372eace.

From: "UNKNOWN" <sip:+13333333333@44.444.4.444;isup-oli=62>;tag=gK046fcff6.

To:  <sip:2222222222@core.com>;tag=CNAM-16688-1467636671937.

CSeq: 468700 INVITE.

Contact: "CNAM" <sip:cnam_gw@10.212.16.30>; transport=udp.

Max-Forwards: 10.

P-Asserted-Identity: "Unavailable" <sip:+13333333333@sip.core.com>.

Content-Length: 0.

P-hint: onreply CNAM_DIPS.

.

 

 

 

 


___

John Petrini

NOC Systems Administrator   //   CoreDial, LLC   //   coredial.com   //   Twitter   LinkedIn   Google Plus   Blog 
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P: 215.297.4400 x232   //   F: 215.297.4401   //   E: jpetrini@coredial.com

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-- 
Daniel-Constantin Mierla
http://www.asipto.com - http://www.kamailio.org
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