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 #define TCP_CONGESTION 0x25 133 134 #ifdef __cplusplus 135 } 136 #endif 137 138 #endif /* _NETINET_TCP_H */ 139