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Annotation of researchv9/sys/h/inet/tcp_fsm.h, revision 1.1

1.1     ! root        1: /*     tcp_fsm.h       6.1     83/07/29        */
        !             2: 
        !             3: /*
        !             4:  * TCP FSM state definitions.
        !             5:  * Per RFC793, September, 1981.
        !             6:  */
        !             7: 
        !             8: #define        TCP_NSTATES     11
        !             9: 
        !            10: #define        TCPS_CLOSED             0       /* closed */
        !            11: #define        TCPS_LISTEN             1       /* listening for connection */
        !            12: #define        TCPS_SYN_SENT           2       /* active, have sent syn */
        !            13: #define        TCPS_SYN_RECEIVED       3       /* have send and received syn */
        !            14: /* states < TCPS_ESTABLISHED are those where connections not established */
        !            15: #define        TCPS_ESTABLISHED        4       /* established */
        !            16: #define        TCPS_CLOSE_WAIT         5       /* rcvd fin, waiting for close */
        !            17: /* states > TCPS_CLOSE_WAIT are those where user has closed */
        !            18: #define        TCPS_FIN_WAIT_1         6       /* have closed, sent fin */
        !            19: #define        TCPS_CLOSING            7       /* closed xchd FIN; await FIN ACK */
        !            20: #define        TCPS_LAST_ACK           8       /* had fin and close; await FIN ACK */
        !            21: /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
        !            22: #define        TCPS_FIN_WAIT_2         9       /* have closed, fin is acked */
        !            23: #define        TCPS_TIME_WAIT          10      /* in 2*msl quiet wait after close */
        !            24: 
        !            25: #define        TCPS_HAVERCVDSYN(s)     ((s) >= TCPS_SYN_RECEIVED)
        !            26: #define        TCPS_HAVERCVDFIN(s)     ((s) >= TCPS_TIME_WAIT)
        !            27: 
        !            28: #ifdef TCPOUTFLAGS
        !            29: /*
        !            30:  * Flags used when sending segments in tcp_output.
        !            31:  * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally
        !            32:  * determined by state, with the proviso that TH_FIN is sent only
        !            33:  * if all data queued for output is included in the segment.
        !            34:  */
        !            35: u_char tcp_outflags[TCP_NSTATES] = {
        !            36:     TH_RST|TH_ACK, 0, TH_SYN, TH_SYN|TH_ACK,
        !            37:     TH_ACK, TH_ACK,
        !            38:     TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_ACK, TH_ACK,
        !            39: };
        !            40: #endif
        !            41: 
        !            42: #ifdef KPROF
        !            43: int    tcp_acounts[TCP_NSTATES][PRU_NREQ];
        !            44: #endif
        !            45: 
        !            46: #ifdef TCPSTATES
        !            47: char *tcpstates[] = {
        !            48:        "CLOSED",       "LISTEN",       "SYN_SENT",     "SYN_RCVD",
        !            49:        "ESTABLISHED",  "CLOSE_WAIT",   "FIN_WAIT_1",   "CLOSING",
        !            50:        "LAST_ACK",     "FIN_WAIT_2",   "TIME_WAIT",
        !            51: };
        !            52: #endif

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