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 #ifndef _NETINET_TCP_FSM_H_ 37 #define _NETINET_TCP_FSM_H_ 38 39 /* 40 * TCP FSM state definitions. 41 * Per RFC793, September, 1981. 42 */ 43 44 #define TCP_NSTATES 11 45 46 #define TCPS_CLOSED 0 /* closed */ 47 #define TCPS_LISTEN 1 /* listening for connection */ 48 #define TCPS_SYN_SENT 2 /* active, have sent syn */ 49 #define TCPS_SYN_RECEIVED 3 /* have send and received syn */ 50 /* states < TCPS_ESTABLISHED are those where connections not established */ 51 #define TCPS_ESTABLISHED 4 /* established */ 52 #define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */ 53 /* states > TCPS_CLOSE_WAIT are those where user has closed */ 54 #define TCPS_FIN_WAIT_1 6 /* have closed, sent fin */ 55 #define TCPS_CLOSING 7 /* closed xchd FIN; await FIN ACK */ 56 #define TCPS_LAST_ACK 8 /* had fin and close; await FIN ACK */ 57 /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */ 58 #define TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */ 59 #define TCPS_TIME_WAIT 10 /* in 2*msl quiet wait after close */ 60 61 #define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED) 62 #define TCPS_HAVERCVDFIN(s) ((s) >= TCPS_TIME_WAIT) 63 64 #ifdef TCPOUTFLAGS 65 /* 66 * Flags used when sending segments in tcp_output. 67 * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally 68 * determined by state, with the proviso that TH_FIN is sent only 69 * if all data queued for output is included in the segment. 70 */ 71 u_char tcp_outflags[TCP_NSTATES] = { 72 TH_RST|TH_ACK, 0, TH_SYN, TH_SYN|TH_ACK, 73 TH_ACK, TH_ACK, 74 TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_FIN|TH_ACK, TH_ACK, TH_ACK, 75 }; 76 #endif 77 78 #ifdef KPROF 79 int tcp_acounts[TCP_NSTATES][PRU_NREQ]; 80 #endif 81 82 #ifdef TCPSTATES 83 char *tcpstates[] = { 84 "CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD", 85 "ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING", 86 "LAST_ACK", "FIN_WAIT_2", "TIME_WAIT", 87 }; 88 #endif 89 90 #endif /* !_NETINET_TCP_FSM_H_ */ 91