[sr-dev] registrar module and reg-id Contact-URI parameter

Peter Dunkley writes:

Specifically, if the Path: header is missing from the REGISTER request or the first Path: does not contain the ;ob URI parameter:

1. If the REGISTER contains a Supported: header with the outbound option

tag and the Contact-URI contains a reg-id parameter the registrar must reject the REGISTER with 439 First Hop Lacks Outbound Support. 2) If the REGISTER does not contain a Supported: header with the outbound option tag then the reg-id parameter must be ignored.

the above applies only if the registrar is not the first hop, i.e., if via header indicates that there was a proxy between the ua and registrar.

-- juha