API functionality API must support Allocate local resources for communication Specify local and remote communication endpoints Initiate a connection( client side) Wait for a connection (server side) Send or receive data Determine when data arrives Generate urgent data Terminate a connection gracefully Handle connection termination from the remote site abort communication Handle error condition or a connection abort Release local resources when communication finishes 哈工大计算机学院李全龙 Network Application Development Socket Programming 6哈工大计算机学院 李全龙 Network Application Development Socket Programming 6 API functionality „ API must support: „ Allocate local resources for communication „ Specify local and remote communication endpoints „ Initiate a connection (client side) „ Wait for a connection (server side) „ Send or receive data „ Determine when data arrives „ Generate urgent data „ Terminate a connection gracefully „ Handle connection termination from the remote site „ Abort communication „ Handle error condition or a connection abort „ Release local resources when communication finishes