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1.1 root 1: /*
2: * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * The contents of this file constitute Original Code as defined in and
7: * are subject to the Apple Public Source License Version 1.1 (the
8: * "License"). You may not use this file except in compliance with the
9: * License. Please obtain a copy of the License at
10: * http://www.apple.com/publicsource and read it before using this file.
11: *
12: * This Original Code and all software distributed under the License are
13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17: * License for the specific language governing rights and limitations
18: * under the License.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /*
23: * Copyright (c) 1982, 1986, 1993
24: * The Regents of the University of California. All rights reserved.
25: *
26: * Redistribution and use in source and binary forms, with or without
27: * modification, are permitted provided that the following conditions
28: * are met:
29: * 1. Redistributions of source code must retain the above copyright
30: * notice, this list of conditions and the following disclaimer.
31: * 2. Redistributions in binary form must reproduce the above copyright
32: * notice, this list of conditions and the following disclaimer in the
33: * documentation and/or other materials provided with the distribution.
34: * 3. All advertising materials mentioning features or use of this software
35: * must display the following acknowledgement:
36: * This product includes software developed by the University of
37: * California, Berkeley and its contributors.
38: * 4. Neither the name of the University nor the names of its contributors
39: * may be used to endorse or promote products derived from this software
40: * without specific prior written permission.
41: *
42: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
43: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
44: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
45: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
46: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
47: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
48: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
49: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
50: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
51: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52: * SUCH DAMAGE.
53: *
54: * @(#)tcp_fsm.h 8.1 (Berkeley) 6/10/93
55: */
56:
57: #ifndef _NETINET_TCP_FSM_H_
58: #define _NETINET_TCP_FSM_H_
59:
60: /*
61: * TCP FSM state definitions.
62: * Per RFC793, September, 1981.
63: */
64:
65: #define TCP_NSTATES 11
66:
67: #define TCPS_CLOSED 0 /* closed */
68: #define TCPS_LISTEN 1 /* listening for connection */
69: #define TCPS_SYN_SENT 2 /* active, have sent syn */
70: #define TCPS_SYN_RECEIVED 3 /* have send and received syn */
71: /* states < TCPS_ESTABLISHED are those where connections not established */
72: #define TCPS_ESTABLISHED 4 /* established */
73: #define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */
74: /* states > TCPS_CLOSE_WAIT are those where user has closed */
75: #define TCPS_FIN_WAIT_1 6 /* have closed, sent fin */
76: #define TCPS_CLOSING 7 /* closed xchd FIN; await FIN ACK */
77: #define TCPS_LAST_ACK 8 /* had fin and close; await FIN ACK */
78: /* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
79: #define TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */
80: #define TCPS_TIME_WAIT 10 /* in 2*msl quiet wait after close */
81:
82: #define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED)
83: #define TCPS_HAVEESTABLISHED(s) ((s) >= TCPS_ESTABLISHED)
84: #define TCPS_HAVERCVDFIN(s) ((s) >= TCPS_TIME_WAIT)
85:
86: #ifdef TCPOUTFLAGS
87: /*
88: * Flags used when sending segments in tcp_output.
89: * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally
90: * determined by state, with the proviso that TH_FIN is sent only
91: * if all data queued for output is included in the segment.
92: */
93: static u_char tcp_outflags[TCP_NSTATES] = {
94: TH_RST|TH_ACK, 0, TH_SYN, TH_SYN|TH_ACK,
95: TH_ACK, TH_ACK,
96: TH_FIN|TH_ACK, TH_ACK, TH_FIN|TH_ACK, TH_ACK, TH_ACK,
97: };
98: #endif
99:
100: #if KPROF
101: int tcp_acounts[TCP_NSTATES][PRU_NREQ];
102: #endif
103:
104: #ifdef TCPSTATES
105: char *tcpstates[] = {
106: "CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD",
107: "ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING",
108: "LAST_ACK", "FIN_WAIT_2", "TIME_WAIT",
109: };
110: #endif
111:
112: #endif
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