[asterisk-dev] Wrong entity field in NOTIFY??

[Eugen Dedu]

Hi asterisk devs,

Since several years we (opal, ekiga VoIP community) noticed that there 
is a problem in the NOTIFY messages created by asterisk (entity 
attribute is set to the subscriber instead of the subscribed) and I 
finally decided to contact you to see whether such a visible bug has 
been around for so many years or we simply miss something evident.  (See 
the log of http://sourceforge.net/p/opalvoip/code/26681 for example for 
a workaround.)

When umfoxd subscribes to 1002's presence, like this for example:

SUBSCRIBE sip:1002 at xivo.xyz.fr SIP/2.0
CSeq: 2 SUBSCRIBE
Via: SIP/2.0/UDP 
157.163.3.246:5060;branch=z9hG4bK52829d51-8f0c-1910-8da9-080027f515ee;rport
User-Agent: Ekiga/4.0.2
Authorization: Digest username="umfodx", realm="xivo", nonce="1c356c20", 
uri="sip:1002 at xivo.xyz.fr", algorithm=MD5, 
response="4f62a8e41ee3c464ff1bf6124b7dda76"
From: <sip:umfodx at xivo.xyz.fr>;tag=1b7f9d51-8f0c-1910-8da4-080027f515ee
Call-ID: e47b9d51-8f0c-1910-8da2-080027f515ee at Windows7-PC
Supported: eventlist
To: <sip:1002 at xivo.xyz.fr>
Accept: application/pidf+xml
Accept: multipart/related
Accept: application/rlmi+xml
Contact: <sip:umfodx at 157.163.3.246>
Allow: 
INVITE,ACK,OPTIONS,BYE,CANCEL,SUBSCRIBE,NOTIFY,REFER,MESSAGE,INFO,PING,PRACK
Expires: 300
Event: presence
Content-Length: 0
Max-Forwards: 70


umfoxd receives afterwards NOTIFY messages, like this for example:

NOTIFY sip:umfodx at 157.163.3.246 SIP/2.0
CSeq: 102 NOTIFY
Via: SIP/2.0/UDP 157.163.1.45:5060;branch=z9hG4bK1ebf2f30;rport
User-Agent: XiVO PBX
From: <sip:1002 at xivo.xyz.fr>;tag=as7426eebf
Call-ID: e47b9d51-8f0c-1910-8da2-080027f515ee at Windows7-PC
To: <sip:umfodx at xivo.xyz.fr>;tag=1b7f9d51-8f0c-1910-8da4-080027f515ee
Contact: <sip:1002 at 157.163.1.45:5060>
Subscription-State: active
Event: presence
Content-Type: application/pidf+xml
Content-Length: 499
Max-Forwards: 70

<?xml version="1.0" encoding="ISO-8859-1"?>
<presence xmlns="urn:ietf:params:xml:ns:pidf"
xmlns:pp="urn:ietf:params:xml:ns:pidf:person"
xmlns:es="urn:ietf:params:xml:ns:pidf:rpid:status:rpid-status"
xmlns:ep="urn:ietf:params:xml:ns:pidf:rpid:rpid-person"
entity="sip:umfodx at xivo.xyz.fr">
<pp:person><status>
</status></pp:person>
<note>Ready</note>
<tuple id="1002">
<contact priority="1">sip:1002 at xivo.xyz.fr</contact>
<status><basic>open</basic></status>
</tuple>
</presence>

The problem is that in the above message the entity attribute is umfoxd 
(the subscriber) instead of 1002 (the publisher).

 From RFC 3863:
The <presence> element MUST have an 'entity' attribute. The value of the 
'entity' attribute is the 'pres' URL of the PRESENTITY publishing this 
presence document.

Regards,
-- 
Eugen
http://eugen.dedu.free.fr