[SR-Users] Add Record-Route on 200 OK

[Alex Balashov]

Kamailio has no hand in this behaviour. It appends the Record-Route header to the initial invite, but dealing with it from that point onward, including ensuring that it is copied into replies sent back to the initiator, is entirely the responsibility of the user agents/endpoints, not the proxy.

--
Alex Balashov | Principal | Evariste Systems LLC
303 Perimeter Center North, Suite 300
Atlanta, GA 30346
United States

Tel: +1-800-250-5920 (toll-free) / +1-678-954-0671 (direct)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/

Sent from my BlackBerry.
  Original Message  
From: Igor Potjevlesch
Sent: Wednesday, January 6, 2016 10:30
To: 'Kamailio (SER) - Users Mailing List'
Reply To: Kamailio (SER) - Users Mailing List
Subject: Re: [SR-Users] Add Record-Route on 200 OK

Hi Alex,

It what I was thinking. What could cause this into Kamailio?

Regards,

Igor.

-----Message d'origine-----
De : sr-users [mailto:sr-users-bounces at lists.sip-router.org] De la part de
Alex Balashov
Envoyé : mercredi 6 janvier 2016 15:39
À : sr-users at lists.sip-router.org
Objet : Re: [SR-Users] Add Record-Route on 200 OK

Igor,

No, that is not normal. The UAS (the server receiving the initial
INVITE) is required to copy the Record-Route into dialog-forming responses.

>From RFC 3261 Section 12.1.1 ("UAS Behavior"):

When a UAS responds to a request with a response that
establishes a dialog (such as a 2xx to INVITE), the UAS
MUST copy all Record-Route header field values from the
request into the response (including the URIs, URI
parameters, and any Record-Route header field parameters,
whether they are known or unknown to the UAS) and MUST
maintain the order of those values.

-- Alex

--
Alex Balashov | Principal | Evariste Systems LLC
303 Perimeter Center North, Suite 300
Atlanta, GA 30346
United States

Tel: +1-800-250-5920 (toll-free) / +1-678-954-0671 (direct)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/

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