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Annotation of 42BSD/sys/netinet/tcp_fsm.h, revision 1.1.1.1

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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