1 /* $OpenBSD: tcp_fsm.h,v 1.5 2001/06/09 07:03:43 angelos Exp $ */ 2 /* $NetBSD: tcp_fsm.h,v 1.6 1994/10/14 16:01:48 mycroft Exp $ */ 3 4 /* 5 * Copyright (c) 1982, 1986, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)tcp_fsm.h 8.1 (Berkeley) 6/10/93 37 */ 38 39 #ifndef _NETINET_TCP_FSM_H_ 40 #define _NETINET_TCP_FSM_H_ 41 42 /* 43 * TCP FSM state definitions. 44 * Per RFC793, September, 1981. 45 */ 46 47 #define TCP_NSTATES 11 48 49 #define TCPS_CLOSED 0 /* closed */ 50 #define TCPS_LISTEN 1 /* listening for connection */ 51 #define TCPS_SYN_SENT 2 /* active, have sent syn */ 52 #define TCPS_SYN_RECEIVED 3 /* have sent and received syn */ 53 /* states < TCPS_ESTABLISHED are those where connections not established */ 54 #define TCPS_ESTABLISHED 4 /* established */ 55 #define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */ 56 /* states > TCPS_CLOSE_WAIT are those where user has closed */ 57 #define TCPS_FIN_WAIT_1 6 /* have closed, sent fin */ 58 #define TCPS_CLOSING 7 /* closed xchd FIN; await ACK */ 59 #define TCPS_LAST_ACK 8 /* had fin and close; await FIN ACK */ 60 /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */ 61 #define TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */ 62 #define TCPS_TIME_WAIT 10 /* in 2*msl quiet wait after close */ 63 64 #define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED) 65 #define TCPS_HAVEESTABLISHED(s) ((s) >= TCPS_ESTABLISHED) 66 #define TCPS_HAVERCVDFIN(s) ((s) >= TCPS_TIME_WAIT) 67 68 #ifdef TCPOUTFLAGS 69 /* 70 * Flags used when sending segments in tcp_output. 71 * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally 72 * determined by state, with the proviso that TH_FIN is sent only 73 * if all data queued for output is included in the segment. 74 */ 75 u_char tcp_outflags[TCP_NSTATES] = { 76 TH_RST|TH_ACK, 0, TH_SYN, TH_SYN|TH_ACK, 77 TH_ACK, TH_ACK, 78 TH_FIN|TH_ACK, TH_ACK, TH_FIN|TH_ACK, TH_ACK, TH_ACK, 79 }; 80 #endif /* TCPOUTFLAGS */ 81 82 #ifdef KPROF 83 int tcp_acounts[TCP_NSTATES][PRU_NREQ]; 84 #endif /* KPROF */ 85 86 #ifdef TCPSTATES 87 char *tcpstates[] = { 88 "CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD", 89 "ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING", 90 "LAST_ACK", "FIN_WAIT_2", "TIME_WAIT", 91 }; 92 #endif /* TCPSTATES */ 93 #endif /* _NETINET_TCP_FSM_H_ */ 94