Hi,
My application represents multiple SIP instances that have the same SIP
URI so I can support simultaneous incoming calls to this URI.
I would also like these instances to be uniquely addressable so I can
support SIP event notification (SUBSCRIBE/NOTIFY).
Therefore I would like to obtain GRUUs from the OpenSips registrar for
these SIP instances.
If all instances have different local SIP URIs the REGISTER response
contains a contact value for each instance. But if the instances have
the same local SIP URI only one contact value is returned in the
REGISTER response.
Could anyone please tell me if this is correct behaviour or should the
response contain a contact value for each instance?
The REGISTER request:
REGISTER sip:192.168.1.178 SIP/2.0
Via: SIP/2.0/UDP
192.168.1.237:5060;branch=z9hG4bKde764961a60b4e2f8e809470a5c20f78
Max-Forwards: 70
From: sip:[email protected];tag=d455cae0a95f4229bcd2153dac7b3c5b
To: sip:[email protected]
Call-ID: f8e77f1a8a604cc98a505bb7017045e4
CSeq: 22 REGISTER
Contact:
<sip:[email protected]>;+sip.instance="<urn:uuid:2f33883736cc4a3d91570e8c06df9b06-002>"
Contact:
<sip:[email protected]>;+sip.instance="<urn:uuid:55372b9295824de19c98a9db63386160-001>"
Supported: gruu
Expires: 600
Content-Length: 0
The REGISTER response:
SIP/2.0 200 OK
Via: SIP/2.0/UDP
192.168.1.237:5060;branch=z9hG4bKde764961a60b4e2f8e809470a5c20f78
From: sip:[email protected];tag=d455cae0a95f4229bcd2153dac7b3c5b
To: sip:[email protected];tag=672eb56ff27ea055e14e7cc9d1cbeb13.6345
Call-ID: f8e77f1a8a604cc98a505bb7017045e4
CSeq: 22 REGISTER
<allOneLine>
Contact: <sip:[email protected]>;expires=600
;pub-gruu="sip:[email protected]:5060;gr=urn:uuid:55372b9295824de19c98a9db63386160-001"
;temp-gruu=
"sip:tgruu.AUUDWmUJQ2QCSRNfYwBAc0UCXVQmRBk3CkUGXWQDEmoCSQZWYQUUNgFJUFdrUEk3UkYAXWsHQWUAXQNeYhEWa1VHBAhiUEgyBkAHDTAISDIFQAYMMQZAYgdAB1s2BQ==@192.168.1.178:5060;gr";+sip.instance="urn:uuid:55372b9295824de19c98a9db63386160-001"
</allOneLine>
Server: OpenSIPS (2.3.1 (x86_64/linux))
Content-Length: 0
Thank you in advance.
Kind regards,
Richard
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