Hi,
Outbound provides the UAC a way to update a binding even if it reboots. For that, a unique and permanent value of instance-id is used, which in conjunction with the AoR and reg-id determines the binding to the UAC.
Having said this, I guess that the CSeq comparison between the one in the Register request and the one in the binding does not apply in this scenario since it is not guaranteed that a UAC saves the CSeq value of the registration among reboots.
Regards.
2012/7/31 Daniel-Constantin Mierla
<miconda@gmail.com>
Hello,
On 7/30/12 7:23 PM, Iņaki Baz Castillo wrote:
2012/7/30 Daniel-Constantin Mierla <miconda@gmail.com>:
quick question to double check if what I understood when I read the specs
was ok -- in gruu/ob, it does not matter anymore the callid/cseq
combination, or there should still be some checks related to it?
In fact that depends on Outbound instead of GRUU, and not, when using
Outbound the registrar does NOT check the Call-ID and CSeq of the
REGISTER (and using GRUU means that Outbound is also used, so the
Contact has a +sip.instance and reg-id params which are inspected by
the registrar to create/update/delete a binding).