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Annotation of 43BSD/sys/netinet/tcp_fsm.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1982, 1986 Regents of the University of California.
        !             3:  * All rights reserved.  The Berkeley software License Agreement
        !             4:  * specifies the terms and conditions for redistribution.
        !             5:  *
        !             6:  *     @(#)tcp_fsm.h   7.1 (Berkeley) 6/5/86
        !             7:  */
        !             8: 
        !             9: /*
        !            10:  * TCP FSM state definitions.
        !            11:  * Per RFC793, September, 1981.
        !            12:  */
        !            13: 
        !            14: #define        TCP_NSTATES     11
        !            15: 
        !            16: #define        TCPS_CLOSED             0       /* closed */
        !            17: #define        TCPS_LISTEN             1       /* listening for connection */
        !            18: #define        TCPS_SYN_SENT           2       /* active, have sent syn */
        !            19: #define        TCPS_SYN_RECEIVED       3       /* have send and received syn */
        !            20: /* states < TCPS_ESTABLISHED are those where connections not established */
        !            21: #define        TCPS_ESTABLISHED        4       /* established */
        !            22: #define        TCPS_CLOSE_WAIT         5       /* rcvd fin, waiting for close */
        !            23: /* states > TCPS_CLOSE_WAIT are those where user has closed */
        !            24: #define        TCPS_FIN_WAIT_1         6       /* have closed, sent fin */
        !            25: #define        TCPS_CLOSING            7       /* closed xchd FIN; await FIN ACK */
        !            26: #define        TCPS_LAST_ACK           8       /* had fin and close; await FIN ACK */
        !            27: /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
        !            28: #define        TCPS_FIN_WAIT_2         9       /* have closed, fin is acked */
        !            29: #define        TCPS_TIME_WAIT          10      /* in 2*msl quiet wait after close */
        !            30: 
        !            31: #define        TCPS_HAVERCVDSYN(s)     ((s) >= TCPS_SYN_RECEIVED)
        !            32: #define        TCPS_HAVERCVDFIN(s)     ((s) >= TCPS_TIME_WAIT)
        !            33: 
        !            34: #ifdef TCPOUTFLAGS
        !            35: /*
        !            36:  * Flags used when sending segments in tcp_output.
        !            37:  * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally
        !            38:  * determined by state, with the proviso that TH_FIN is sent only
        !            39:  * if all data queued for output is included in the segment.
        !            40:  */
        !            41: u_char tcp_outflags[TCP_NSTATES] = {
        !            42:     TH_RST|TH_ACK, 0, TH_SYN, TH_SYN|TH_ACK,
        !            43:     TH_ACK, TH_ACK,
        !            44:     TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_ACK, TH_ACK,
        !            45: };
        !            46: #endif
        !            47: 
        !            48: #ifdef KPROF
        !            49: int    tcp_acounts[TCP_NSTATES][PRU_NREQ];
        !            50: #endif
        !            51: 
        !            52: #ifdef TCPSTATES
        !            53: char *tcpstates[] = {
        !            54:        "CLOSED",       "LISTEN",       "SYN_SENT",     "SYN_RCVD",
        !            55:        "ESTABLISHED",  "CLOSE_WAIT",   "FIN_WAIT_1",   "CLOSING",
        !            56:        "LAST_ACK",     "FIN_WAIT_2",   "TIME_WAIT",
        !            57: };
        !            58: #endif

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