If every contact has an expires parameter then the Expires header is irrelevant since its value is used for nothing. Its just an ideosyncracy of the spec that it is still required in that case.
Paul
Sarika Gupta wrote:
Hi I have a query on the precedence between Expires header and Expires in Contact in 200 OK message
As per the text in RFC3261, REGISTER message can contain Expires in either the Expires header or the Expires parameter in Contact header. And as per my understanding if both are present then the value in Expires parameter of Contact header overrides value in Expires header. Is this correct?
In 200 OK sent in response to a REGISTER, I have two issues 1. Since RFC 3261 clearly says that the Contact in 200 OK Must Contain Expires Parameter, this implies that if the Contact is present, its Expires parameter should be filled. Now my question does it mean that if a Contact is present Expires header shall be absent in 200 OK? 2. If not then who takes the precendence expiry value in Expires header or Expires pameter in Contact header?
Thanks
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