[sr-dev] [tracker] Task opened: notify cseq is not incremented

[sip-router]

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A new Flyspray task has been opened.  Details are below. 

User who did this - Juha Heinanen (jh) 

Attached to Project - sip-router
Summary - notify cseq is not incremented
Task Type - Bug Report
Category - Module
Status - New
Assigned To - 
Operating System - All
Severity - Medium
Priority - Normal
Reported Version - Development
Due in Version - Undecided
Due Date - Undecided
Details - 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 and pres_update_watchers() call, 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 (the 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


More information can be found at the following URL:
http://sip-router.org/tracker/index.php?do=details&task_id=228

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