HP 800 ACSE/Presentation and ROSE Interface Programmer's Guide - Page 35

Figure 3-3 Using ACSE/Presentation Step 2: Establish an Association Establish Initiator and Responder Roles Process A and Process B establish initiator and responder roles using the attribute, AP_ROLE_ALLOWED in a call to ap_set_env(). In this example, Process A is the initiator, and Process B is the responder. (See Figure 3-3.) Establish Roles Process A Process B AP Environment A ap_set_env() ap_set_env() AP Environment B AP_ROLE_ALLOWED,initiator AP_ROLE_ALLOWED,responder NOTE Initiator Communication Endpoint A Responder Communication Endpoint B The initiator and responder roles must be established before binding the communication endpoint to the local presentation address while in the AP_UNBOUND state. Any change in AP_ROLE_ALLOWED after binding is ignored. Binding the Endpoints Process A and Process B must each bind a valid presentation address (pselector, s-selector, t-selector, and NSAP) to its endpoint by using the attribute AP_BIND_PADDR in the ap_set_env() call. (See Figure 3-4.) For more information on presentation addresses, refer to Chapter 4. Chapter 3 35