70 lines
2.7 KiB
C
70 lines
2.7 KiB
C
/*
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* Copyright (c) 1982, 1986 Regents of the University of California.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms are permitted
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* provided that the above copyright notice and this paragraph are
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* duplicated in all such forms and that any documentation,
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* advertising materials, and other materials related to such
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* distribution and use acknowledge that the software was developed
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* by the University of California, Berkeley. The name of the
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* University may not be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
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* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*
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* @(#)tcp_fsm.h 7.3 (Berkeley) 6/29/88
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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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#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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/* states < TCPS_ESTABLISHED are those where connections not established */
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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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/* states > TCPS_CLOSE_WAIT are those where user has closed */
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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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/* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
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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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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 KPROF
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int tcp_acounts[TCP_NSTATES][PRU_NREQ];
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#endif
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#ifdef TCPSTATES
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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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