Golang in net package usage

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Func Listen (NET, laddr string) (Listener, error)//returns the Listener that is listening on a local network address laddr. The network type parameter net must be a stream-oriented network: "TCP", "TCP4", "TCP6", "Unix", or "Unixpacket". See the dial function for LADDR syntax.

The type Listener//listener is a common network listener interface for stream-oriented network protocols. Multiple threads may call a listener method at the same time.

Type Listener Interface {Accept () (c Conn, err Error)//wait and return the next connection to the connection close () error   //close Listener, after closing, Any action that blocks the accept is no longer blocked and returns ERRORADDR () Addr   //Returns the network address of the interface}