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Annotation of 43BSDReno/sys/netinet/tcp_fsm.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1982, 1986 Regents of the University of California.
                      3:  * All rights reserved.
                      4:  *
                      5:  * Redistribution is only permitted until one year after the first shipment
                      6:  * of 4.4BSD by the Regents.  Otherwise, redistribution and use in source and
                      7:  * binary forms are permitted provided that: (1) source distributions retain
                      8:  * this entire copyright notice and comment, and (2) distributions including
                      9:  * binaries display the following acknowledgement:  This product includes
                     10:  * software developed by the University of California, Berkeley and its
                     11:  * contributors'' in the documentation or other materials provided with the
                     12:  * distribution and in all advertising materials mentioning features or use
                     13:  * of this software.  Neither the name of the University nor the names of
                     14:  * its contributors may be used to endorse or promote products derived from
                     15:  * this software without specific prior written permission.
                     16:  * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
                     17:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
                     18:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     19:  *
                     20:  *     @(#)tcp_fsm.h   7.4 (Berkeley) 6/28/90
                     21:  */
                     22: 
                     23: /*
                     24:  * TCP FSM state definitions.
                     25:  * Per RFC793, September, 1981.
                     26:  */
                     27: 
                     28: #define        TCP_NSTATES     11
                     29: 
                     30: #define        TCPS_CLOSED             0       /* closed */
                     31: #define        TCPS_LISTEN             1       /* listening for connection */
                     32: #define        TCPS_SYN_SENT           2       /* active, have sent syn */
                     33: #define        TCPS_SYN_RECEIVED       3       /* have send and received syn */
                     34: /* states < TCPS_ESTABLISHED are those where connections not established */
                     35: #define        TCPS_ESTABLISHED        4       /* established */
                     36: #define        TCPS_CLOSE_WAIT         5       /* rcvd fin, waiting for close */
                     37: /* states > TCPS_CLOSE_WAIT are those where user has closed */
                     38: #define        TCPS_FIN_WAIT_1         6       /* have closed, sent fin */
                     39: #define        TCPS_CLOSING            7       /* closed xchd FIN; await FIN ACK */
                     40: #define        TCPS_LAST_ACK           8       /* had fin and close; await FIN ACK */
                     41: /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
                     42: #define        TCPS_FIN_WAIT_2         9       /* have closed, fin is acked */
                     43: #define        TCPS_TIME_WAIT          10      /* in 2*msl quiet wait after close */
                     44: 
                     45: #define        TCPS_HAVERCVDSYN(s)     ((s) >= TCPS_SYN_RECEIVED)
                     46: #define        TCPS_HAVERCVDFIN(s)     ((s) >= TCPS_TIME_WAIT)
                     47: 
                     48: #ifdef TCPOUTFLAGS
                     49: /*
                     50:  * Flags used when sending segments in tcp_output.
                     51:  * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally
                     52:  * determined by state, with the proviso that TH_FIN is sent only
                     53:  * if all data queued for output is included in the segment.
                     54:  */
                     55: u_char tcp_outflags[TCP_NSTATES] = {
                     56:     TH_RST|TH_ACK, 0, TH_SYN, TH_SYN|TH_ACK,
                     57:     TH_ACK, TH_ACK,
                     58:     TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_ACK, TH_ACK,
                     59: };
                     60: #endif
                     61: 
                     62: #ifdef KPROF
                     63: int    tcp_acounts[TCP_NSTATES][PRU_NREQ];
                     64: #endif
                     65: 
                     66: #ifdef TCPSTATES
                     67: char *tcpstates[] = {
                     68:        "CLOSED",       "LISTEN",       "SYN_SENT",     "SYN_RCVD",
                     69:        "ESTABLISHED",  "CLOSE_WAIT",   "FIN_WAIT_1",   "CLOSING",
                     70:        "LAST_ACK",     "FIN_WAIT_2",   "TIME_WAIT",
                     71: };
                     72: #endif

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