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Annotation of 43BSDTahoe/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.
        !             4:  *
        !             5:  * Redistribution and use in source and binary forms are permitted
        !             6:  * provided that the above copyright notice and this paragraph are
        !             7:  * duplicated in all such forms and that any documentation,
        !             8:  * advertising materials, and other materials related to such
        !             9:  * distribution and use acknowledge that the software was developed
        !            10:  * by the University of California, Berkeley.  The name of the
        !            11:  * University may not be used to endorse or promote products derived
        !            12:  * from this software without specific prior written permission.
        !            13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
        !            14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
        !            15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            16:  *
        !            17:  *     @(#)tcp_fsm.h   7.3 (Berkeley) 6/29/88
        !            18:  */
        !            19: 
        !            20: /*
        !            21:  * TCP FSM state definitions.
        !            22:  * Per RFC793, September, 1981.
        !            23:  */
        !            24: 
        !            25: #define        TCP_NSTATES     11
        !            26: 
        !            27: #define        TCPS_CLOSED             0       /* closed */
        !            28: #define        TCPS_LISTEN             1       /* listening for connection */
        !            29: #define        TCPS_SYN_SENT           2       /* active, have sent syn */
        !            30: #define        TCPS_SYN_RECEIVED       3       /* have send and received syn */
        !            31: /* states < TCPS_ESTABLISHED are those where connections not established */
        !            32: #define        TCPS_ESTABLISHED        4       /* established */
        !            33: #define        TCPS_CLOSE_WAIT         5       /* rcvd fin, waiting for close */
        !            34: /* states > TCPS_CLOSE_WAIT are those where user has closed */
        !            35: #define        TCPS_FIN_WAIT_1         6       /* have closed, sent fin */
        !            36: #define        TCPS_CLOSING            7       /* closed xchd FIN; await FIN ACK */
        !            37: #define        TCPS_LAST_ACK           8       /* had fin and close; await FIN ACK */
        !            38: /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
        !            39: #define        TCPS_FIN_WAIT_2         9       /* have closed, fin is acked */
        !            40: #define        TCPS_TIME_WAIT          10      /* in 2*msl quiet wait after close */
        !            41: 
        !            42: #define        TCPS_HAVERCVDSYN(s)     ((s) >= TCPS_SYN_RECEIVED)
        !            43: #define        TCPS_HAVERCVDFIN(s)     ((s) >= TCPS_TIME_WAIT)
        !            44: 
        !            45: #ifdef TCPOUTFLAGS
        !            46: /*
        !            47:  * Flags used when sending segments in tcp_output.
        !            48:  * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally
        !            49:  * determined by state, with the proviso that TH_FIN is sent only
        !            50:  * if all data queued for output is included in the segment.
        !            51:  */
        !            52: u_char tcp_outflags[TCP_NSTATES] = {
        !            53:     TH_RST|TH_ACK, 0, TH_SYN, TH_SYN|TH_ACK,
        !            54:     TH_ACK, TH_ACK,
        !            55:     TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_ACK, TH_ACK,
        !            56: };
        !            57: #endif
        !            58: 
        !            59: #ifdef KPROF
        !            60: int    tcp_acounts[TCP_NSTATES][PRU_NREQ];
        !            61: #endif
        !            62: 
        !            63: #ifdef TCPSTATES
        !            64: char *tcpstates[] = {
        !            65:        "CLOSED",       "LISTEN",       "SYN_SENT",     "SYN_RCVD",
        !            66:        "ESTABLISHED",  "CLOSE_WAIT",   "FIN_WAIT_1",   "CLOSING",
        !            67:        "LAST_ACK",     "FIN_WAIT_2",   "TIME_WAIT",
        !            68: };
        !            69: #endif

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