The ESOK API manages the socket connection underlying event I/O and annotation:

• ESOK_stackInit initialises the socket stack.
• ESOK_open opens a connection to the ECS engine.
• ESOK_buildRemote populates an ESOK_Remote structure referring to a local engine instance.
• ESOK_process gives control to the socket stack.
• ESOK_getFdSet gets file descriptors for all currently open connections.
• ESOK_stackEmpty returns true if the socket stack is empty
• ESOK_stackReset resets the socket stack back to it's initial state.
• ESOK_close closes the socket stack connection to the ECS engine