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 */ 25 26 /* 27 * Copyright (c) 1982, 1986 Regents of the University of California. 28 * All rights reserved. The Berkeley software License Agreement 29 * specifies the terms and conditions for redistribution. 30 */ 31 32 #ifndef _NETINET_TCP_H 33 #define _NETINET_TCP_H 34 35 /* tcp.h 1.11 88/08/19 SMI; from UCB 7.2 10/28/86 */ 36 37 38 #include <sys/isa_defs.h> 39 #include <sys/inttypes.h> 40 41 #ifdef __cplusplus 42 extern "C" { 43 #endif 44 45 typedef uint32_t tcp_seq; 46 /* 47 * TCP header. 48 * Per RFC 793, September, 1981. 49 */ 50 struct tcphdr { 51 uint16_t th_sport; /* source port */ 52 uint16_t th_dport; /* destination port */ 53 tcp_seq th_seq; /* sequence number */ 54 tcp_seq th_ack; /* acknowledgement number */ 55 #ifdef _BIT_FIELDS_LTOH 56 uint_t th_x2:4, /* (unused) */ 57 th_off:4; /* data offset */ 58 #else 59 uint_t th_off:4, /* data offset */ 60 th_x2:4; /* (unused) */ 61 #endif 62 uchar_t th_flags; 63 #define TH_FIN 0x01 64 #define TH_SYN 0x02 65 #define TH_RST 0x04 66 #define TH_PUSH 0x08 67 #define TH_ACK 0x10 68 #define TH_URG 0x20 69 #define TH_ECE 0x40 70 #define TH_CWR 0x80 71 uint16_t th_win; /* window */ 72 uint16_t th_sum; /* checksum */ 73 uint16_t th_urp; /* urgent pointer */ 74 }; 75 76 #define TCPOPT_EOL 0 77 #define TCPOPT_NOP 1 78 #define TCPOPT_MAXSEG 2 79 #define TCPOPT_WSCALE 3 80 #define TCPOPT_SACK_PERMITTED 4 81 #define TCPOPT_SACK 5 82 #define TCPOPT_TSTAMP 8 83 84 /* 85 * Default maximum segment size for TCP. 86 * With an IP MTU of 576, this is 536. 87 */ 88 #define TCP_MSS 536 89 90 /* 91 * Options for use with [gs]etsockopt at the TCP level. 92 * 93 * Note: Some of the TCP_ namespace has conflict with and 94 * and is exposed through <xti.h>. (It also requires exposing 95 * options not implemented). The options with potential 96 * for conflicts use #ifndef guards. 97 */ 98 #ifndef TCP_NODELAY 99 #define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */ 100 #endif 101 102 #ifndef TCP_MAXSEG 103 #define TCP_MAXSEG 0x02 /* set maximum segment size */ 104 #endif 105 106 #ifndef TCP_KEEPALIVE 107 #define TCP_KEEPALIVE 0x8 /* set keepalive timer */ 108 #endif 109 110 111 #define TCP_NOTIFY_THRESHOLD 0x10 112 #define TCP_ABORT_THRESHOLD 0x11 113 #define TCP_CONN_NOTIFY_THRESHOLD 0x12 114 #define TCP_CONN_ABORT_THRESHOLD 0x13 115 #define TCP_RECVDSTADDR 0x14 116 #define TCP_INIT_CWND 0x15 117 #define TCP_KEEPALIVE_THRESHOLD 0x16 118 #define TCP_KEEPALIVE_ABORT_THRESHOLD 0x17 119 #define TCP_CORK 0x18 120 #define TCP_RTO_INITIAL 0x19 121 #define TCP_RTO_MIN 0x1A 122 #define TCP_RTO_MAX 0x1B 123 #define TCP_LINGER2 0x1C 124 125 /* gap for expansion of ``standard'' options */ 126 #define TCP_ANONPRIVBIND 0x20 /* for internal use only */ 127 #define TCP_EXCLBIND 0x21 /* for internal use only */ 128 129 #ifdef __cplusplus 130 } 131 #endif 132 133 #endif /* _NETINET_TCP_H */ 134