sl@0: /* TCP_FSM.H
sl@0:  * 
sl@0:  * Portions Copyright (c) 1997-1999 Nokia Corporation and/or its subsidiary(-ies).
sl@0:  * All rights reserved.
sl@0:  */
sl@0: 
sl@0: /*
sl@0:  * Copyright (c) 1982, 1986 Regents of the University of California.
sl@0:  * All rights reserved.  The Berkeley software License Agreement
sl@0:  * specifies the terms and conditions for redistribution.
sl@0:  */
sl@0: 
sl@0: /** @file
sl@0: @publishedAll
sl@0: @released
sl@0: */
sl@0: 
sl@0: /*
sl@0:  * TCP FSM state definitions.
sl@0:  * Per RFC793, September, 1981.
sl@0:  */
sl@0: 
sl@0: #ifndef	_NETINET_TCP_FSM_H
sl@0: #define	_NETINET_TCP_FSM_H
sl@0: 
sl@0: #ifdef	__cplusplus
sl@0: extern "C" {
sl@0: #endif
sl@0: 
sl@0: #define	TCP_NSTATES	11
sl@0: 
sl@0: #define	TCPS_CLOSED		0	/* closed */
sl@0: #define	TCPS_LISTEN		1	/* listening for connection */
sl@0: #define	TCPS_SYN_SENT		2	/* active, have sent syn */
sl@0: #define	TCPS_SYN_RECEIVED	3	/* have send and received syn */
sl@0: /** 
sl@0: states < TCPS_ESTABLISHED are those where connections not established 
sl@0: */
sl@0: #define	TCPS_ESTABLISHED	4	/* established */
sl@0: #define	TCPS_CLOSE_WAIT		5	/* rcvd fin, waiting for close */
sl@0: 
sl@0: /** 
sl@0: states > TCPS_CLOSE_WAIT are those where user has closed 
sl@0: */
sl@0: #define	TCPS_FIN_WAIT_1		6	/* have closed, sent fin */
sl@0: #define	TCPS_CLOSING		7	/* closed xchd FIN; await FIN ACK */
sl@0: #define	TCPS_LAST_ACK		8	/* had fin and close; await FIN ACK */
sl@0: 
sl@0: /** 
sl@0: states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN 
sl@0: */
sl@0: #define	TCPS_FIN_WAIT_2		9	/* have closed, fin is acked */
sl@0: #define	TCPS_TIME_WAIT		10	/* in 2*msl quiet wait after close */
sl@0: 
sl@0: #define	TCPS_HAVERCVDSYN(s)	((s) >= TCPS_SYN_RECEIVED)
sl@0: #define	TCPS_HAVERCVDFIN(s)	((s) >= TCPS_TIME_WAIT)
sl@0: 
sl@0: #ifdef	TCPOUTFLAGS
sl@0: /**
sl@0: Flags used when sending segments in tcp_output.
sl@0: Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally
sl@0: determined by state, with the proviso that TH_FIN is sent only
sl@0: if all data queued for output is included in the segment.
sl@0: */
sl@0: const u_char	tcp_outflags[TCP_NSTATES] = {
sl@0:     TH_RST|TH_ACK, 0, TH_SYN, TH_SYN|TH_ACK,
sl@0:     TH_ACK, TH_ACK,
sl@0:     TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_ACK, TH_ACK,
sl@0: };
sl@0: #endif
sl@0: 
sl@0: #ifdef	TCPSTATES
sl@0: 
sl@0: const char *tcpstates[] = {
sl@0: 	"CLOSED",	"LISTEN",	"SYN_SENT",	"SYN_RCVD",
sl@0: 	"ESTABLISHED",	"CLOSE_WAIT",	"FIN_WAIT_1",	"CLOSING",
sl@0: 	"LAST_ACK",	"FIN_WAIT_2",	"TIME_WAIT",
sl@0: };
sl@0: #endif
sl@0: 
sl@0: #ifdef	__cplusplus
sl@0: }
sl@0: #endif
sl@0: 
sl@0: #endif	/* _NETINET_TCP_FSM_H */