% TCP Service Primitives

\[\begin{tabular}{llp{3.0in}}
Events&	connected&	open succeeded (either ACTIVE or PASSIVE)\\
&	connect fails&	ACTIVE open failed\\
&	data ready&	data can be received\\
&	errored&	the connection has errored and is now closed\\
&	closed&		an orderly disconnection has started\\[0.2in]
Actions&listen on port&	PASSIVE open on the given port (server)\\
&	open port&	ACTIVE open on the given port (client)\\
&	read data&	data is received\\
&	send data&	data is sent\\
&	close&		the connection is gracefully closed
\end{tabular}\]