[OpenSIPS-Users] B2BUA - Transfer Issue because of no SDP

[Duane Larson]

I'll look at implementing that but it sounds like the "use_init_sdp"
parameter is the answer to my issue but it doesn't include the initial SDP
message in my re-invite.

I am a little confused how to go about this because I found this post by
Anca
http://opensips-open-sip-server.1449251.n2.nabble.com/B2BUA-Refer-scenario-not-sending-SDP-td6710874.html#a6712915

So in her post the re-INVITE shouldn't have any SDP and then you add the
SDP in the the 200OK.  My SIP Provider says they will not allow a re-INVITE
without a SDP message.  And when you read the description for the
"use_init_sdp" parameter it says "The correct way is to send an Invite
without a body in this case, but it has been observed that not many
gateways support this".  Sure enough my SIP Providers gateways don't
support a re-INVITE without SDP.

Any other thoughts on this?


On Mon, Oct 8, 2012 at 3:35 AM, Binan AL Halabi <binanalhalabi at yahoo.com>wrote:

> Hi Duane,
>
> Try to add SDP body manually if it is not added:
> - Save the original SDP ($rb) somewhere before calling b2b_init_request()
> function.
> - Add it to reInvite in local_route.
>
> //Binan
>   ------------------------------
> *Från:* Duane Larson <duane.larson at gmail.com>
> *Till:* OpenSIPS users mailling list <users at lists.opensips.org>
> *Skickat:* måndag, 8 oktober 2012 0:23
> *Ämne:* [OpenSIPS-Users] B2BUA - Transfer Issue because of no SDP
>
> I have a couple of issues with transferring calls when my SIP provider is
> involved.
>
> Issue #1 - Call comes from SIP Provider to Customer A100.  Customer A100
> picks up.  Customer A100 transfers call to Customer A102.  While Customer
> A102's phone is ringing the SIP Provider user on the line doesn't hear
> anything at all.
>
> Issue #2 - Call comes from Customer A100 to someone on the PSTN network
> via my SIP Provider.  PSTN user picks up.  Customer A100 transfers call to
> Customer A102.  This fails because SIP Provider sends me a 603 Decline.
>
>
> I have talked with my provider and they say both scenarios are due to the
> fact that I am sending a Re-Invite without any SDP message.  On my B2BUA
> OpenSIPS server I am using the REFER scenario and also have the following
> in my config
> modparam("b2b_logic", "use_init_sdp", 1)
>
> Here is my refer b2bua script
>
> <?xml version="1.0"?>
> <scenario id="refer" name="Handle refer at server" param="0" type="script">
>   <init>
>     <bridge>
>       <server>
>         <id>server1</id>
>       </server>
>       <client>
>         <id>client1</id>
>         <type>message</type>
>         <destination>
>           <value type="initial">server1</value>
>         </destination>
>       </client>
>     </bridge>
>   </init>
>
>   <rules>
>      <request>
>        <refer>
>          <rule id="1">
>            <action>
>              <send_reply>
>                <code>202</code>
>                <reason>Accepted</reason>
>              </send_reply>
>              <end_dialog_leg/>
>              <bridge>
>                <client>
>                  <peer/>
>                </client>
>                <client>
>                  <id>client2</id>
>
>                  <destination>
>                    <value type="header">Refer-To</value>
>                  </destination>
>                </client>
>              </bridge>
>            </action>
>          </rule>
>        </refer>
>     </request>
>   </rules>
> </scenario>
>
>
> Anyone have an idea what I am doing wrong?
>
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Duane
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