3.2.1.3.1 Flow Control and ReceiveWindow Processing

The receiver MUST advertise the size of the ReceiveWindow using the ReceiveWindowSize RTS command as defined in section 2.2.3.5.1, and the sender MUST initialize its abstract data model from this RTS command and initialize the Send Queue to an initial empty state. This advertising happens in a way that is specific to each role and, as such, is defined in the section for each specific role.