[SIPForum-discussion] SIP Request-URI in inital request but recieved SIPS Request-URI in subsequent request.

[LIN Grace]

All,

UA sends one initial INVITE request with SIPS Contact but with SIP Request URI (and same SIP URI in To header), then if it recieves subsequent request like BYE with SIPS Request URI and SIPS Contact, how UA should behave? Is it reasonable that SIP Node sending out subsequent request with SIPS Request-URI to UA?

And how about UA sending out SIPS Contact and SIPS Request-URI in initial request, but then it receives SIP Contact and SIP Request-URI in the subsequent request of the same dialog?

Per RFC5630 5.3 Proxy behavior SIP Contact and SIPS Request URI is not allowed, while not inherbit SIPS Contact and SIP Request URI as follows:
---------------------------------------
  If a proxy needs to reject a request because the URIs are used
   inconsistently (e.g., the Request-URI is a SIPS URI, but the Contact
   header field is a SIP URI), the proxy SHOULD use response code 400
   (Bad Request).
---------------------------------

Thanks,
Grace

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