3.2.5.1 INITIAL_OFFER_MESSAGE Response Received
If a message response matches one of its set of outstanding requests, the client MUST delete it from the set of outstanding requests and cancel the Request Timer for this request. If the response is INTERESTED, the client MUST respond with a SEGMENT_INFO_MESSAGE request (section 2.2.1.4) for the associated HoHoDk, which MUST be stored in its set of outstanding request messages. A request timer must also be set for this message.
If there are no outstanding requests that match with the message response, the client MUST discard the message.