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Annotation of 43BSD/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.  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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