Hi Steve, Thank you for letting us know about this.
I ran this past some of the other Project Clearwater developers. We based Project Clearwater’s behaviour on our interpretation of the 3GPP specs. In particular, 3GPP TS 23.003<http://www.3gpp.org/dynareport/23003.htm> contains the following paragraph: “The canonical form of a SIP URI for a Public User Identity shall take the form "sip:username@domain" as specified in IETF RFC 3261 [26], section 10.3. SIP URI comparisons shall be performed as defined in IETF RFC 3261 [26], section 19.1.4.” We interpreted this as meaning that we should be sending IMPUs in SIP messages in this form, with all URI parameters removed. Looking more closely, the spec states that the canonical form must be used over Diameter interfaces, but it does not specify the behaviour for SIP interfaces: “According to 3GPP TS 29.229 [95] and 3GPP TS 29.329 [96] the canonical forms of SIP URI and Tel URI shall be used over the corresponding Diameter interfaces.” Do you have a different interpretation of this part of the spec to the one we used? In any case, we may be able to help. What is the use-case that you are trying to address here? Yours, Chris From: Clearwater [mailto:[email protected]] On Behalf Of Steve Yeoman Sent: 07 March 2016 14:48 To: [email protected] Subject: [Project Clearwater] preserving user=phone parameter on 3rd-party registration Hi, I am trying to register a subscriber with a user=phone parameter. I want the user=phone parameter to be passed to the TAS for the 3rd-party registration. It looks like sprout receives the To header as: To: <sip:[email protected]<mailto:sip%3a%[email protected]>;user=phone> But sends the HSS lookup to Homestead like this: 07-03-2016 14:35:53.552 UTC Debug httpconnection.cpp:623: Sending HTTP request : http://ec2-52-3-140-139.compute-1.amazonaws.com:8888/impi/%2B6505550202%40example.com/registration-status?impu=sip%3A%2B6505550202%40example.com&visited-network=example.com&auth-type=REG (trying 172.31.45.86) on new connection which fails to find my IMPU because I have sip:[email protected]<mailto:sip%3a%[email protected]>;user=phone in the HSS. So the registration fails. I tried adding a second IMPU in the HSS without user=phone (i.e. sip:[email protected]<mailto:sip%3a%[email protected]>), but then Homestead finds that entry and Sprout sends the 3rd-party reg to the TAS without user=phone. Is there a way to preserve the user=phone param throughout the whole registration? I tried adding enforce_user_phone=Y and enforce_global_only_lookups=Y to my /etc/cleawater/shared_config file but that didn't seem to help. cheers Steve Yeoman
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