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Re: [sipcore] I-D Action: draft-ietf-sipcore-rfc4244bis-callflows-02.txt

worley@ariadne.com (Dale R. Worley) Wed, 27 February 2013 03:23 UTC

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From: worley@ariadne.com
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To: OKUMURA Shinji <shinji.okumura@softfront.jp>
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Cc: sipcore@ietf.org
Subject: Re: [sipcore] I-D Action: draft-ietf-sipcore-rfc4244bis-callflows-02.txt
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> From: OKUMURA Shinji <shinji.okumura@softfront.jp>

> [original]
>    F6 INVITE Example.com -> VM
> 
>    INVITE sip:vm@192.0.2.6;target=sip:carol%40example.com SIP/2.0
>    Via: SIP/2.0/TCP proxy.example.com:5060;branch=z9hG4bKbbg4
>    Via: SIP/2.0/TCP 192.0.2.3:5060;branch=z9hG4bK42t2
>    Max-Forward: 67
>    From: Alice <sip:alice@example.com>;tag=kkaz-
>    To: Bob <sip:bob@example.com>
>    Supported: histinfo
>    Call-Id: 12345600@example.com
>    CSeq: 1 INVITE
>    History-Info: <sip:bob@example.com>;index=1
>    History-Info: <sip:bob@192.0.2.5?Reason=SIP%3Bcause%3D302\
>                       ;text="Moved Temporarily">;index=1.1;rc=1
>    History-Info: <sip:carol@example.com?Reason=SIP%3Bcause%3D408>;\
>                       index=1.2;mp=1
>    History-Info: <sip:carol@192.0.2.4>;index=1.2.1;rc=1.2
>    History-Info: <sip:vm@example.com;target=sip:carol%40example.com>;\
>                       index=1.3;mp=1.2
>    History-Info: <sip:vm@192.0.2.5;target=sip:carol%40example.com>\
>                       ;cause=408;index=1.3.1;rc=1.3
>    Contact: Alice <sip:alice@192.0.2.3>
>    Content-Type: application/sdp
>    Content-Length: <appropriate value>

> [my indexing]
>    INVITE sip:vm@192.0.2.6;target=sip:carol%40example.com;cause=408 SIP/2.0
>    <snip/>
>    History-Info: <sip:vm@example.com;target=sip:carol%40example.com;cause=408>;\
>                       index=1.2.2;mp=1.2
>    History-Info: <sip:vm@192.0.2.5;target=sip:carol%40example.com;cause=408>\
>                       ;index=1.2.2.1;rc=1.2.2

I believe that you've found an error.

If the call was sent to *Bob's* voicemail, then the fork to VM would
be a child of the INVITE to sip:bob@example.com (index 1), so the
INVITE to voicemail would have index 1.3.

But in this case, the call was sent to *Carol's* voicemail, it is
(most likely) a child of the INVITE to sip:carol@example.com (index
1.2), and so the INVITE to voicemail would have index 1.2.2.

Dale

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