Re: [reSIProcate-users] Problem with what I think is unattended transfer on a UA using resiprocate

[Scott Godin <sgodin@xxxxxxxxxxxxxxx>]

Hi Simon,

This sounds like more a question for the softphone developer.  

Perhaps they are looking for errors in DialogUsageManager::findInviteSession API call incorrectly.  This API returns a std::pair with the 2nd arg as the ErrorStatusCode - but the ErrorStatusCode should only be inspected if the first element is InviteSessionHandle::NotValid() - sample code in BasicClientCall::onNewSession shows this.

Scott

On Thu, Mar 12, 2015 at 6:02 PM, Simon Gregory <simon@xxxxxxxxxxxx> wrote:

Hi,

Simple (I hope) question on transfer to a target that has NOT yet answered the original call:

 

If I send an INVITE to a User Agent that uses reciprocate (and rhymes with “Mia”), it sends me back a 180 Ringing...then *before* the owner answers I send an INVITE-Replaces with a Replaces header that references the call id, from-tag AND to-tag of the original dialog (where the to-tag is actually the one created by “Mia” when sending me back the 180).

I get a 481 back from “Mia” to this INVITE-Replaces.

 

If I allow “Mia” to answer the phone i.e. generate a 200 OK before I attempt the INVITE-Replaces all works fine and the session is replaced.

 

 

Can anyone tell me why resip is trying - and failing - to match based on this example - the sequence is:

1) INVITE to “Mia” with CallID A, from tag B

2) “Mia” sends back 180 Ringing with CallID A, from tag B, to tag C

3) ... wait a few seconds

4) INVITE to “Mia” with CallID D and Replaces header including

A;from-tag=B;to-tag=C

 

My question really is - what should my Replaces header contain in order to get the resip / “Mia” dialog matching to work on this "ringing but not yet answered call" ?

Many thanks for any help.

 

P.S> this seems to fail on all desktop version of “Mia”

 

P.P.S> I have considered trying all these:

 

Replaces: 94ab8a63-81657ac1@10.0.0.97;from-tag=8b7615fb4286a409o0;to-tag=318de128

Replaces: 94ab8a63-81657ac1@10.0.0.97;from-tag=8b7615fb4286a409o0;to-tag=

Replaces: 94ab8a63-81657ac1@10.0.0.97;from-tag=8b7615fb4286a409o0;to-tag=0

Replaces: 94ab8a63-81657ac1@10.0.0.97;from-tag=8b7615fb4286a409o0;to-tag=318de128;early-only

 

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