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- /*
- * Copyright (c) 1982, 1986 Regents of the University of California.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by the University of California, Berkeley. The name of the
- * University may not be used to endorse or promote products derived
- * from this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- *
- * @(#)tcp_fsm.h 7.3 (Berkeley) 6/29/88
- */
-
- /*
- * TCP FSM state definitions.
- * Per RFC793, September, 1981.
- */
-
- #define TCP_NSTATES 11
-
- #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 send and received syn */
- /* states < TCPS_ESTABLISHED are those where connections not established */
- #define TCPS_ESTABLISHED 4 /* established */
- #define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */
- /* states > TCPS_CLOSE_WAIT are those where user has closed */
- #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 */
- /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
- #define TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */
- #define TCPS_TIME_WAIT 10 /* in 2*msl quiet wait after close */
-
- #define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED)
- #define TCPS_HAVERCVDFIN(s) ((s) >= TCPS_TIME_WAIT)
-
- #ifdef TCPOUTFLAGS
- /*
- * Flags used when sending segments in tcp_output.
- * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally
- * determined by state, with the proviso that TH_FIN is sent only
- * if all data queued for output is included in the segment.
- */
- u_char tcp_outflags[TCP_NSTATES] = {
- TH_RST|TH_ACK, 0, TH_SYN, TH_SYN|TH_ACK,
- TH_ACK, TH_ACK,
- TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_ACK, TH_ACK,
- };
- #endif
-
- #ifdef KPROF
- int tcp_acounts[TCP_NSTATES][PRU_NREQ];
- #endif
-
- #ifdef TCPSTATES
- char *tcpstates[] = {
- "CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD",
- "ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING",
- "LAST_ACK", "FIN_WAIT_2", "TIME_WAIT",
- };
- #endif
-