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Annotation of Net2/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.
                      4:  *
                      5:  * Redistribution and use in source and binary forms, with or without
                      6:  * modification, are permitted provided that the following conditions
                      7:  * are met:
                      8:  * 1. Redistributions of source code must retain the above copyright
                      9:  *    notice, this list of conditions and the following disclaimer.
                     10:  * 2. Redistributions in binary form must reproduce the above copyright
                     11:  *    notice, this list of conditions and the following disclaimer in the
                     12:  *    documentation and/or other materials provided with the distribution.
                     13:  * 3. All advertising materials mentioning features or use of this software
                     14:  *    must display the following acknowledgement:
                     15:  *     This product includes software developed by the University of
                     16:  *     California, Berkeley and its contributors.
                     17:  * 4. Neither the name of the University nor the names of its contributors
                     18:  *    may be used to endorse or promote products derived from this software
                     19:  *    without specific prior written permission.
                     20:  *
                     21:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     22:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     23:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     24:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     25:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     26:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     27:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     28:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     29:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     30:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     31:  * SUCH DAMAGE.
                     32:  *
                     33:  *     @(#)tcp_fsm.h   7.4 (Berkeley) 6/28/90
                     34:  */
                     35: 
                     36: /*
                     37:  * TCP FSM state definitions.
                     38:  * Per RFC793, September, 1981.
                     39:  */
                     40: 
                     41: #define        TCP_NSTATES     11
                     42: 
                     43: #define        TCPS_CLOSED             0       /* closed */
                     44: #define        TCPS_LISTEN             1       /* listening for connection */
                     45: #define        TCPS_SYN_SENT           2       /* active, have sent syn */
                     46: #define        TCPS_SYN_RECEIVED       3       /* have send and received syn */
                     47: /* states < TCPS_ESTABLISHED are those where connections not established */
                     48: #define        TCPS_ESTABLISHED        4       /* established */
                     49: #define        TCPS_CLOSE_WAIT         5       /* rcvd fin, waiting for close */
                     50: /* states > TCPS_CLOSE_WAIT are those where user has closed */
                     51: #define        TCPS_FIN_WAIT_1         6       /* have closed, sent fin */
                     52: #define        TCPS_CLOSING            7       /* closed xchd FIN; await FIN ACK */
                     53: #define        TCPS_LAST_ACK           8       /* had fin and close; await FIN ACK */
                     54: /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
                     55: #define        TCPS_FIN_WAIT_2         9       /* have closed, fin is acked */
                     56: #define        TCPS_TIME_WAIT          10      /* in 2*msl quiet wait after close */
                     57: 
                     58: #define        TCPS_HAVERCVDSYN(s)     ((s) >= TCPS_SYN_RECEIVED)
                     59: #define        TCPS_HAVERCVDFIN(s)     ((s) >= TCPS_TIME_WAIT)
                     60: 
                     61: #ifdef TCPOUTFLAGS
                     62: /*
                     63:  * Flags used when sending segments in tcp_output.
                     64:  * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally
                     65:  * determined by state, with the proviso that TH_FIN is sent only
                     66:  * if all data queued for output is included in the segment.
                     67:  */
                     68: u_char tcp_outflags[TCP_NSTATES] = {
                     69:     TH_RST|TH_ACK, 0, TH_SYN, TH_SYN|TH_ACK,
                     70:     TH_ACK, TH_ACK,
                     71:     TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_ACK, TH_ACK,
                     72: };
                     73: #endif
                     74: 
                     75: #ifdef KPROF
                     76: int    tcp_acounts[TCP_NSTATES][PRU_NREQ];
                     77: #endif
                     78: 
                     79: #ifdef TCPSTATES
                     80: char *tcpstates[] = {
                     81:        "CLOSED",       "LISTEN",       "SYN_SENT",     "SYN_RCVD",
                     82:        "ESTABLISHED",  "CLOSE_WAIT",   "FIN_WAIT_1",   "CLOSING",
                     83:        "LAST_ACK",     "FIN_WAIT_2",   "TIME_WAIT",
                     84: };
                     85: #endif

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