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