[sr-dev] notify cseq is not incremented

[Peter Dunkley]

Hi,

There are lots of CSeq race conditions when subs_db_mode is DB only.  I
am working on adding separate notifier processes to presence which,
amongst other things, will fix this.

I had intended to get this into master last week, but other stuff came
up and the development has been a bit more complicated than I'd hoped.
I expect to commit these changes (which should fix your problem)
sometime over the next week.

Peter

On Wed, 2012-05-02 at 09:20 +0300, Juha Heinanen wrote:

> while doing some presence tests with master i noticed that when presence
> server sends notify that terminates subscription due to change in xcap
> authorization rules, cseq in the notify is same as in previous one.
> 
> rfc3261 says in 12.2.1 UAC Behavior:
> 
>    Requests within a dialog MUST contain strictly monotonically
>    increasing and contiguous CSeq sequence numbers (increasing-by-one)
>    in each direction (excepting ACK and CANCEL of course, whose numbers
>    equal the requests being acknowledged or cancelled).
> 
> so this looks like a bug to twinkle (and me).  below is sip debug from
> twinkle (subscriber).
> 
> -- juha
> 
> +++ 2-5-2012 08:50:41.158705 INFO SIP ::process_sip_msg
> Received from: tcp:192.98.103.10:5060
> NOTIFY sip:jh at 192.98.103.10:5074;transport=tcp SIP/2.0
> Via: SIP/2.0/TCP 192.98.103.10;branch=z9hG4bK4da2.6447f6ae08e84f0c0fbec6f7090757cc.0;i=c1
> Via: SIP/2.0/TCP 127.0.0.1:5082;branch=z9hG4bK4da2.4e788af3000000000000000000000000.0
> To: sip:jh at test.fi;tag=pqazy
> From: sip:test at test.fi;tag=4a664ec84c547b2d0bc0fe8965f834e4-8a4b
> CSeq: 2 NOTIFY
> Call-ID: byxobtomskpzmos at siika.tutpro.com
> Content-Length: 210
> User-Agent: OpenXg Presence/XCAP Server  (3.3.0-dev8 (x86_64/linux))
> Max-Forwards: 69
> Event: presence
> Contact: <sip:127.0.0.1:5082;alias=127.0.0.1~35306~2;transport=tcp>
> Subscription-State: active;expires=3670
> Content-Type: application/pidf+xml
> 
> <?xml version="1.0" encoding="UTF-8"?>
> <presence xmlns="urn:ietf:params:xml:ns:pidf" entity="sip:test at test.fi">
>   <tuple id="gxsdoz">
>     <status>
>       <basic>open</basic>
>     </status>
>   </tuple>
> </presence>
> 
> ---
> 
> +++ 2-5-2012 08:50:41.161169 INFO SIP ::send_sip_tcp
> Send to: tcp:192.98.103.10:5060
> SIP/2.0 200 OK
> Via: SIP/2.0/TCP 192.98.103.10;branch=z9hG4bK4da2.6447f6ae08e84f0c0fbec6f7090757cc.0;i=c1,SIP/2.0/TCP 127.0.0.1:5082;branch=z9hG4bK4da2.4e788af3000000000000000000000000.0
> To: <sip:jh at test.fi>;tag=pqazy
> From: <sip:test at test.fi>;tag=4a664ec84c547b2d0bc0fe8965f834e4-8a4b
> Call-ID: byxobtomskpzmos at siika.tutpro.com
> CSeq: 2 NOTIFY
> Server: Twinkle/1.4.2
> Content-Length: 0
> 
> 
> ---
> 
> +++ 2-5-2012 08:51:00.381465 INFO SIP ::process_sip_msg
> Received from: tcp:192.98.103.10:5060
> NOTIFY sip:jh at 192.98.103.10:5074;transport=tcp SIP/2.0
> Via: SIP/2.0/TCP 192.98.103.10;branch=z9hG4bK4da2.fd70b43b9da3c3b488208a61595b1112.0;i=c1
> Via: SIP/2.0/TCP 127.0.0.1:5082;branch=z9hG4bK4da2.444a74e2000000000000000000000000.0
> To: sip:jh at test.fi;tag=pqazy
> From: sip:test at test.fi;tag=4a664ec84c547b2d0bc0fe8965f834e4-8a4b
> CSeq: 2 NOTIFY
> Call-ID: byxobtomskpzmos at siika.tutpro.com
> Content-Length: 0
> User-Agent: OpenXg Presence/XCAP Server  (3.3.0-dev8 (x86_64/linux))
> Max-Forwards: 69
> Event: presence
> Contact: <sip:127.0.0.1:5082;alias=127.0.0.1~35306~2;transport=tcp>
> Subscription-State: terminated;reason=terminated
> 
> ---
> 
> +++ 2-5-2012 08:51:00.381794 WARNING NORMAL t_subscription_dialog::recvd_request
> CSeq seqnr is out of sequence.
> Reveived seqnr: 2
> Remote seqnr: 2
> 
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-- 
Peter Dunkley
Technical Director
Crocodile RCS Ltd
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