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