1 /*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22 /*
23 * Copyright (c) 1991, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Copyright (c) 2011 Nexenta Systems, Inc. All rights reserved.
25 */
26
27 /*
28 * Copyright (c) 1982, 1986 Regents of the University of California.
29 * All rights reserved. The Berkeley software License Agreement
30 * specifies the terms and conditions for redistribution.
31 */
32
33 #ifndef _NETINET_TCP_H
34 #define _NETINET_TCP_H
35
36 /* tcp.h 1.11 88/08/19 SMI; from UCB 7.2 10/28/86 */
37
38
39 #include <sys/isa_defs.h>
40 #include <sys/inttypes.h>
41
42 #ifdef __cplusplus
43 extern "C" {
44 #endif
45
46 typedef uint32_t tcp_seq;
47 /*
48 * TCP header.
49 * Per RFC 793, September, 1981.
50 */
51 struct tcphdr {
52 uint16_t th_sport; /* source port */
53 uint16_t th_dport; /* destination port */
54 tcp_seq th_seq; /* sequence number */
55 tcp_seq th_ack; /* acknowledgement number */
56 #ifdef _BIT_FIELDS_LTOH
57 uint_t th_x2:4, /* (unused) */
58 th_off:4; /* data offset */
59 #else
60 uint_t th_off:4, /* data offset */
61 th_x2:4; /* (unused) */
62 #endif
63 uchar_t th_flags;
64 #define TH_FIN 0x01
65 #define TH_SYN 0x02
66 #define TH_RST 0x04
67 #define TH_PUSH 0x08
68 #define TH_ACK 0x10
69 #define TH_URG 0x20
70 #define TH_ECE 0x40
71 #define TH_CWR 0x80
72 uint16_t th_win; /* window */
73 uint16_t th_sum; /* checksum */
74 uint16_t th_urp; /* urgent pointer */
75 };
76
77 #define TCPOPT_EOL 0
78 #define TCPOPT_NOP 1
79 #define TCPOPT_MAXSEG 2
80 #define TCPOPT_WSCALE 3
81 #define TCPOPT_SACK_PERMITTED 4
82 #define TCPOPT_SACK 5
83 #define TCPOPT_TSTAMP 8
84
85 /*
86 * Default maximum segment size for TCP.
87 * With an IP MTU of 576, this is 536.
88 */
89 #define TCP_MSS 536
90
91 /*
92 * Options for use with [gs]etsockopt at the TCP level.
93 *
94 * Note: Some of the TCP_ namespace has conflict with and
95 * and is exposed through <xti.h>. (It also requires exposing
96 * options not implemented). The options with potential
97 * for conflicts use #ifndef guards.
98 */
99 #ifndef TCP_NODELAY
100 #define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */
101 #endif
102
103 #ifndef TCP_MAXSEG
104 #define TCP_MAXSEG 0x02 /* set maximum segment size */
105 #endif
106
107 #ifndef TCP_KEEPALIVE
108 #define TCP_KEEPALIVE 0x8 /* set keepalive timer */
109 #endif
110
111
112 #define TCP_NOTIFY_THRESHOLD 0x10
113 #define TCP_ABORT_THRESHOLD 0x11
114 #define TCP_CONN_NOTIFY_THRESHOLD 0x12
115 #define TCP_CONN_ABORT_THRESHOLD 0x13
116 #define TCP_RECVDSTADDR 0x14
117 #define TCP_INIT_CWND 0x15
118 #define TCP_KEEPALIVE_THRESHOLD 0x16
119 #define TCP_KEEPALIVE_ABORT_THRESHOLD 0x17
120 #define TCP_CORK 0x18
121 #define TCP_RTO_INITIAL 0x19
122 #define TCP_RTO_MIN 0x1A
123 #define TCP_RTO_MAX 0x1B
124 #define TCP_LINGER2 0x1C
125
126 /* gap for expansion of ``standard'' options */
127 #define TCP_ANONPRIVBIND 0x20 /* for internal use only */
128 #define TCP_EXCLBIND 0x21 /* for internal use only */
129 #define TCP_KEEPIDLE 0x22
130 #define TCP_KEEPCNT 0x23
131 #define TCP_KEEPINTVL 0x24
132
133 #ifdef __cplusplus
134 }
135 #endif
136
137 #endif /* _NETINET_TCP_H */