[pjsip] Service-route overriding proxy
olivier at heliosnet.org
Sun Nov 4 06:33:11 EST 2007
Hello benny :)
Just wondering what you decided about this service-route issue ?
Benny Prijono a écrit :
> Okay, thanks for the info.
> So is appending Service-Route to existing/preconfigured route set
> the best approach? Any potential pitfalls with this? (I can't think
> of any).
> Olivier Beytrison wrote:
>> let me quote the book "The IMS IP Multimedia Concepts and Services" from
>> Page 180 reguarding the 200 OK returned from a successful Registration
>> The UE, when receiving the 200 (OK) response, will store the entries in
>> the Service-Route header. Whenever the UE sends out any initial
>> requestion other than a REGISTER message, it will :
>> * include the addresses that were received in the Service-Route header
>> within a Route header of the initial requests; and
>> * include the P-CSCF address as the topmost Route entry in the initial
>> should clear your doubts :)
>> Benny Prijono a écrit :
>>> Klaus Darilion wrote:
>>>> Olivier Beytrison schrieb:
>>>>> I don't think so. Because th P-CSCF address will be mostly assigned by
>>>>> DHCP Option. Because when you're are moving with your device, you move
>>>>> from one area to another one covered by annother GGSN, which mean you'll
>>>>> have to contact a new P-CSCF, this without invalidating your registration.
>>>> In the 3G book from Gonzalo Camarillo, the Service Route only includes
>>>> the S-CSCF (no P and no I).
>>> Thanks for joining the discussion, Klaus. I think I must have
>>> misunderstood RFC 3608 Section 6.1, which I thought says that the
>>> Service-Route headers replace the whole route set configured in the UA.
>>> So as a confirmation, is it correct to append Service-Route headers
>>> into existing route set?
>>>> Nevertheless I think Benny is right: without reREGISTRATION after
>>>> changing the P-CSCF the client can not receive incoming calls (still
>>>> routed to old P-CSCF using the old path).
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