2010/7/28 Henning Westerholt henning.westerholt@1und1.de:
On Wednesday 28 July 2010, SourceForge.net wrote:
Initial Comment: When an UA fetches the bindings for a user and the user isn't registered, properly return an empty contact.
Hi Alex,
may i ask what is returned currently according your tests?
A "Contact" header with no value is *not* valid according to SIP BNF grammar (I'vechecked it), so in case a UA fetches its bindging and there are not bindings then the registrar should reply a 200 without "Contact" header. Taking this into account I suspect that this commit is wrong ("properly return an empty contact").
As a side note, there is a bug/issue open for RFC 3261 related to this topic as the RFC 3261 seems to state that the registrar should reply a 200 with a Contact header containing all the bindings. But it's clear (also in the RFC bug report) that the BNF grammar cannot be violated so there should be NO Contact header if there are no bindings.