1/*
2 * Copyright (c) 2000 Apple Computer, Inc. All rights reserved.
3 *
4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
5 *
6 * This file contains Original Code and/or Modifications of Original Code
7 * as defined in and that are subject to the Apple Public Source License
8 * Version 2.0 (the 'License'). You may not use this file except in
9 * compliance with the License. The rights granted to you under the License
10 * may not be used to create, or enable the creation or redistribution of,
11 * unlawful or unlicensed copies of an Apple operating system, or to
12 * circumvent, violate, or enable the circumvention or violation of, any
13 * terms of an Apple operating system software license agreement.
14 *
15 * Please obtain a copy of the License at
16 * http://www.opensource.apple.com/apsl/ and read it before using this file.
17 *
18 * The Original Code and all software distributed under the License are
19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
23 * Please see the License for the specific language governing rights and
24 * limitations under the License.
25 *
26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
27 */
28/*
29 * Copyright (c) 1982, 1986, 1993
30 * The Regents of the University of California. All rights reserved.
31 *
32 * Redistribution and use in source and binary forms, with or without
33 * modification, are permitted provided that the following conditions
34 * are met:
35 * 1. Redistributions of source code must retain the above copyright
36 * notice, this list of conditions and the following disclaimer.
37 * 2. Redistributions in binary form must reproduce the above copyright
38 * notice, this list of conditions and the following disclaimer in the
39 * documentation and/or other materials provided with the distribution.
40 * 3. All advertising materials mentioning features or use of this software
41 * must display the following acknowledgement:
42 * This product includes software developed by the University of
43 * California, Berkeley and its contributors.
44 * 4. Neither the name of the University nor the names of its contributors
45 * may be used to endorse or promote products derived from this software
46 * without specific prior written permission.
47 *
48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
58 * SUCH DAMAGE.
59 *
60 * @(#)tcp_fsm.h 8.1 (Berkeley) 6/10/93
61 * $FreeBSD: src/sys/netinet/tcp_fsm.h,v 1.14 1999/11/07 04:18:30 jlemon Exp $
62 */
63
64#ifndef _NETINET_TCP_FSM_H_
65#define _NETINET_TCP_FSM_H_
66#include <sys/appleapiopts.h>
67
68/*
69 * TCP FSM state definitions.
70 * Per RFC793, September, 1981.
71 */
72
73#define TCP_NSTATES 11
74
75#define TCPS_CLOSED 0 /* closed */
76#define TCPS_LISTEN 1 /* listening for connection */
77#define TCPS_SYN_SENT 2 /* active, have sent syn */
78#define TCPS_SYN_RECEIVED 3 /* have send and received syn */
79/* states < TCPS_ESTABLISHED are those where connections not established */
80#define TCPS_ESTABLISHED 4 /* established */
81#define TCPS_CLOSE_WAIT 5 /* rcvd fin, waiting for close */
82/* states > TCPS_CLOSE_WAIT are those where user has closed */
83#define TCPS_FIN_WAIT_1 6 /* have closed, sent fin */
84#define TCPS_CLOSING 7 /* closed xchd FIN; await FIN ACK */
85#define TCPS_LAST_ACK 8 /* had fin and close; await FIN ACK */
86/* states > TCPS_CLOSE_WAIT && < TCPS_FIN_WAIT_2 await ACK of FIN */
87#define TCPS_FIN_WAIT_2 9 /* have closed, fin is acked */
88#define TCPS_TIME_WAIT 10 /* in 2*msl quiet wait after close */
89
90/* for KAME src sync over BSD*'s */
91#define TCP6_NSTATES TCP_NSTATES
92#define TCP6S_CLOSED TCPS_CLOSED
93#define TCP6S_LISTEN TCPS_LISTEN
94#define TCP6S_SYN_SENT TCPS_SYN_SENT
95#define TCP6S_SYN_RECEIVED TCPS_SYN_RECEIVED
96#define TCP6S_ESTABLISHED TCPS_ESTABLISHED
97#define TCP6S_CLOSE_WAIT TCPS_CLOSE_WAIT
98#define TCP6S_FIN_WAIT_1 TCPS_FIN_WAIT_1
99#define TCP6S_CLOSING TCPS_CLOSING
100#define TCP6S_LAST_ACK TCPS_LAST_ACK
101#define TCP6S_FIN_WAIT_2 TCPS_FIN_WAIT_2
102#define TCP6S_TIME_WAIT TCPS_TIME_WAIT
103
104#define TCPS_HAVERCVDSYN(s) ((s) >= TCPS_SYN_RECEIVED)
105#define TCPS_HAVEESTABLISHED(s) ((s) >= TCPS_ESTABLISHED)
106#define TCPS_HAVERCVDFIN(s) ((s) >= TCPS_TIME_WAIT)
107#define TCPS_HAVERCVDFIN2(s) ((s) == TCPS_CLOSE_WAIT || \
108 (s) == TCPS_CLOSING || \
109 (s) == TCPS_LAST_ACK || \
110 (s) == TCPS_TIME_WAIT)
111
112#ifdef KERNEL_PRIVATE
113#include <netinet/tcp.h>
114/*
115 * Flags used when sending segments in tcp_output.
116 * Basic flags (TH_RST,TH_ACK,TH_SYN,TH_FIN) are totally
117 * determined by state, with the proviso that TH_FIN is sent only
118 * if all data queued for output is included in the segment.
119 */
120static u_char tcp_outflags[TCP_NSTATES] = {
121 TH_RST | TH_ACK, /* 0, CLOSED */
122 0, /* 1, LISTEN */
123 TH_SYN, /* 2, SYN_SENT */
124 TH_SYN | TH_ACK, /* 3, SYN_RECEIVED */
125 TH_ACK, /* 4, ESTABLISHED */
126 TH_ACK, /* 5, CLOSE_WAIT */
127 TH_FIN | TH_ACK, /* 6, FIN_WAIT_1 */
128 TH_FIN | TH_ACK, /* 7, CLOSING */
129 TH_FIN | TH_ACK, /* 8, LAST_ACK */
130 TH_ACK, /* 9, FIN_WAIT_2 */
131 TH_ACK, /* 10, TIME_WAIT */
132};
133#endif /* KERNEL_PRIVATE */
134
135#if KPROF
136#ifdef KERNEL_PRIVATE
137int tcp_acounts[TCP_NSTATES][PRU_NREQ];
138#endif /* KERNEL_PRIVATE */
139#endif
140
141#ifdef TCPSTATES
142char *tcpstates[] = {
143 "CLOSED", "LISTEN", "SYN_SENT", "SYN_RCVD",
144 "ESTABLISHED", "CLOSE_WAIT", "FIN_WAIT_1", "CLOSING",
145 "LAST_ACK", "FIN_WAIT_2", "TIME_WAIT"
146};
147#endif
148
149#endif
150