لینوکس و شبکه

CLOSED: #Indicates that the server has received an ACK signal from the client and the connection is closed

CLOSE_WAIT: #[Indicates that the server has received the first FIN signal from the client and the connection is in the process of being closed]

#[So this essentially means that his is a state where socket is waiting for the application to execute close()]

#[A socket can be in CLOSE_WAIT state indefinitely until the application closes it]

#[Faulty scenarios would be like filedescriptor leak, server not being execute close() on socket leading to pile up of close_wait sockets]

ESTABLISHED: #Indicates that the server received the SYN signal from the client and the session is established

FIN_WAIT_1: #Indicates that the connection is still active but not currently being used

FIN_WAIT_2: #Indicates that the client just received acknowledgment of the first FIN signal from the server

LAST_ACK #Indicates that the server is in the process of sending its own FIN signal

LISTENING: #Indicates that the server is ready to accept a connection

SYN_RECEIVED: #Indicates that the server just received a SYN signal from the client

SYN_SEND: #Indicates that this particular connection is open and active

TIME_WAIT: #Indicates that the client recognizes the connection as still active but not currently being used