tcp_fsm.h File Reference

TCP state machine definitions. More...

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Defines
#define	TCP_NSTATES   11
	Total number of possible states.
#define	TCPS_CLOSED   0
	closed
#define	TCPS_LISTEN   1
	listening for connection
#define	TCPS_SYN_SENT   2
	active, have sent syn
#define	TCPS_SYN_RECEIVED   3
	have sent and received syn
#define	TCPS_ESTABLISHED   4
	established
#define	TCPS_CLOSE_WAIT   5
	rcvd fin, waiting for close
#define	TCPS_FIN_WAIT_1   6
	have closed, sent fin
#define	TCPS_CLOSING   7
	closed xchd FIN; await FIN ACK
#define	TCPS_LAST_ACK   8
	had fin and close; await FIN ACK
#define	TCPS_FIN_WAIT_2   9
	have closed, fin is acked
#define	TCPS_TIME_WAIT   10
	in 2*msl quiet wait after close
Functions
void	NutTcpStateMachine (NETBUF *nb)
	Process incoming TCP segments.
int	NutTcpInitStateMachine (void)
	Start TCP state machine.
int	NutTcpStatePassiveOpenEvent (TCPSOCKET *sock)
	Initiated by the application.
int	NutTcpStateActiveOpenEvent (TCPSOCKET *sock)
	Initiated by the application.
int	NutTcpStateCloseEvent (TCPSOCKET *sock)
	Socket close by application.
int	NutTcpStateWindowEvent (TCPSOCKET *sock)
	Initiated by the application.
int	NutTcpStateRetranTimeout (TCPSOCKET *sock)
	Retransmit a segment after ACK timeout.

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Detailed Description

TCP state machine definitions.

Definition in file tcp_fsm.h.

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Define Documentation

#define TCP_NSTATES   11

Total number of possible states.

Definition at line 89 of file tcp_fsm.h.

#define TCPS_CLOSED   0

closed

Examples:

httpd/httpserv.c.

Definition at line 95 of file tcp_fsm.h.

Referenced by NutDumpSockState(), NutTcpAbortSocket(), NutTcpConnect(), NutTcpCreateSocket(), NutTcpFindSocket(), NutTcpSetSockOpt(), NutTcpStateCloseEvent(), and NutTcpStatePassiveOpenEvent().

#define TCPS_LISTEN   1

listening for connection

Examples:

httpd/httpserv.c.

Definition at line 96 of file tcp_fsm.h.

Referenced by NutDumpSockState(), NutTcpConnect(), NutTcpFindSocket(), NutTcpSm(), NutTcpStateCloseEvent(), and NutTcpStatePassiveOpenEvent().

#define TCPS_SYN_SENT   2

active, have sent syn

Examples:

httpd/httpserv.c.

Definition at line 97 of file tcp_fsm.h.

Referenced by NutDumpSockState(), NutTcpStateActiveOpenEvent(), and NutTcpStateCloseEvent().

#define TCPS_SYN_RECEIVED   3

have sent and received syn

Examples:

httpd/httpserv.c.

Definition at line 98 of file tcp_fsm.h.

Referenced by NutDumpSockState(), NutTcpSm(), and NutTcpStateCloseEvent().

#define TCPS_ESTABLISHED   4

established

Examples:

httpd/httpserv.c.

Definition at line 99 of file tcp_fsm.h.

Referenced by NutDumpSockState(), NutTcpDeviceWrite(), NutTcpReceive(), NutTcpSend(), NutTcpStateActiveOpenEvent(), and NutTcpStateCloseEvent().

#define TCPS_CLOSE_WAIT   5

rcvd fin, waiting for close

Examples:

httpd/httpserv.c.

Definition at line 100 of file tcp_fsm.h.

Referenced by NutDumpSockState(), NutTcpReceive(), NutTcpStateActiveOpenEvent(), and NutTcpStateCloseEvent().

#define TCPS_FIN_WAIT_1   6

have closed, sent fin

Examples:

httpd/httpserv.c.

Definition at line 101 of file tcp_fsm.h.

Referenced by NutDumpSockState(), NutTcpAbortSocket(), and NutTcpStateCloseEvent().

#define TCPS_CLOSING   7

closed xchd FIN; await FIN ACK

Examples:

httpd/httpserv.c.

Definition at line 102 of file tcp_fsm.h.

Referenced by NutDumpSockState(), and NutTcpStateCloseEvent().

#define TCPS_LAST_ACK   8

had fin and close; await FIN ACK

Examples:

httpd/httpserv.c.

Definition at line 103 of file tcp_fsm.h.

Referenced by NutDumpSockState(), and NutTcpStateCloseEvent().

#define TCPS_FIN_WAIT_2   9

have closed, fin is acked

Examples:

httpd/httpserv.c.

Definition at line 104 of file tcp_fsm.h.

Referenced by NutDumpSockState(), NutTcpSm(), and NutTcpStateCloseEvent().

#define TCPS_TIME_WAIT   10

in 2*msl quiet wait after close

Examples:

httpd/httpserv.c.

Definition at line 105 of file tcp_fsm.h.

Referenced by NutDumpSockState(), NutTcpAbortSocket(), NutTcpSm(), and NutTcpStateCloseEvent().