TCP sockets or connected UDP sockets. It is typically called immediately after a socket has been created. It may also be called when a data transfer is already going on. Closes the corresponding ATM connection. Any further traffic between the endpoints is routed like other traffic.
Actual data can flow in both directions.
This allows to dedicate an ATM connection for the traffic between two endpoints. For the active open, a destination ATM address must be associated with a socket. In systems using per-socket route and ARP caching, this can be done by presetting the caches with the appropriate values. Care must be taken that routing and ARP information obtained through Arequipa does not leak to other parts of the system. For the passive open, an incoming SVC must be associated with the socket that terminates the corresponding connection or data flow.