TCP Socket State

TCP connection state machine values (RFC 793) More...

Macros
#define	TCP_STATE_CLOSED   (0)
	Socket is closed, no connection exists.
#define	TCP_STATE_LISTEN   (1)
	Socket is listening for incoming connections.
#define	TCP_STATE_SYN_SENT   (2)
	SYN packet sent, waiting for SYN-ACK.
#define	TCP_STATE_SYN_RCVD   (3)
	SYN received, SYN-ACK sent.
#define	TCP_STATE_WAIT_FOR_ACCEPT   (4)
	Connection pending, waiting for accept() call.
#define	TCP_STATE_ESTABLISHED   (5)
	Connection established, data transfer possible.
#define	TCP_STATE_CLOSE_WAIT   (6)
	FIN received from remote host, local close pending.
#define	TCP_STATE_LAST_ACK   (7)
	FIN sent, waiting for final ACK.
#define	TCP_STATE_FIN_WAIT_1   (8)
	Local FIN sent, waiting for ACK.
#define	TCP_STATE_FIN_WAIT_2   (9)
	Local FIN acknowledged, waiting for remote FIN.
#define	TCP_STATE_CLOSING   (10)
	Both sides closing simultaneously.
#define	TCP_STATE_TIME_WAIT   (11)
	Connection closed, waiting to ensure remote received final ACK.

Detailed Description

TCP connection state machine values (RFC 793)

#include< tcp.h>


These constants represent the current state of a TCP connection according to the TCP state machine defined in RFC 793. These values should not be modified as they correspond to the TCP protocol specification.