Ideally UAS that receives the message request *should not* insert contact header in the 2xx response, because there is no dialog established. So if a UAC receives a 2xx response with Contact header, then it can either ignore it (which is better) or flag an error (which may not be the case).
Regards Ranjit -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Thursday, November 19, 2009 5:20 PM To: [email protected] Subject: [Sip-implementors] MESSAGE with Contact Header -- UAS processing Hi, RFC 3428 says that Contact Header should not be present in MESSAGE or 2xx Response. UAS Processing "UAS MUST NOT insert a Contact header field into a 2xx response." But what if MESSAGE with Contact header reaches the UAS? Should the UAS send a 2xx response? Or any 4xx response; if yes, which one? Also, how should UAC handle 2xx response for MESSAGE, if Contact Header is present in it? Thanks, Sunil Please do not print this email unless it is absolutely necessary. The information contained in this electronic message and any attachments to this message are intended for the exclusive use of the addressee(s) and may contain proprietary, confidential or privileged information. If you are not the intended recipient, you should not disseminate, distribute or copy this e-mail. Please notify the sender immediately and destroy all copies of this message and any attachments. WARNING: Computer viruses can be transmitted via email. The recipient should check this email and any attachments for the presence of viruses. The company accepts no liability for any damage caused by any virus transmitted by this email. www.wipro.com _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
