/* * CDDL HEADER START * * The contents of this file are subject to the terms of the * Common Development and Distribution License (the "License"). * You may not use this file except in compliance with the License. * * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE * or http://www.opensolaris.org/os/licensing. * See the License for the specific language governing permissions * and limitations under the License. * * When distributing Covered Code, include this CDDL HEADER in each * file and include the License file at usr/src/OPENSOLARIS.LICENSE. * If applicable, add the following below this CDDL HEADER, with the * fields enclosed by brackets "[]" replaced with your own identifying * information: Portions Copyright [yyyy] [name of copyright owner] * * CDDL HEADER END */ /* * Copyright (c) 1991, 2010, Oracle and/or its affiliates. All rights reserved. * Copyright (c) 2011 Nexenta Systems, Inc. All rights reserved. * Copyright 2024 Oxide Computer Company */ /* * Copyright (c) 1982, 1986 Regents of the University of California. * All rights reserved. The Berkeley software License Agreement * specifies the terms and conditions for redistribution. */ #ifndef _NETINET_TCP_H #define _NETINET_TCP_H /* tcp.h 1.11 88/08/19 SMI; from UCB 7.2 10/28/86 */ #include <sys/isa_defs.h> #include <sys/inttypes.h> #ifdef __cplusplus extern "C" { #endif typedef uint32_t tcp_seq; /* * TCP header. * Per RFC 793, September, 1981. */ struct tcphdr { uint16_t th_sport; /* source port */ uint16_t th_dport; /* destination port */ tcp_seq th_seq; /* sequence number */ tcp_seq th_ack; /* acknowledgement number */ #ifdef _BIT_FIELDS_LTOH uint_t th_x2:4, /* (unused) */ th_off:4; /* data offset */ #else uint_t th_off:4, /* data offset */ th_x2:4; /* (unused) */ #endif uchar_t th_flags; #define TH_FIN 0x01 #define TH_SYN 0x02 #define TH_RST 0x04 #define TH_PUSH 0x08 #define TH_ACK 0x10 #define TH_URG 0x20 #define TH_ECE 0x40 #define TH_CWR 0x80 uint16_t th_win; /* window */ uint16_t th_sum; /* checksum */ uint16_t th_urp; /* urgent pointer */ }; #define TCPOPT_EOL 0 #define TCPOPT_NOP 1 #define TCPOPT_MAXSEG 2 #define TCPOPT_WSCALE 3 #define TCPOPT_SACK_PERMITTED 4 #define TCPOPT_SACK 5 #define TCPOPT_TSTAMP 8 #define TCPOPT_MD5 19 /* RFC 2385 */ /* * Default maximum segment size for TCP. * With an IP MTU of 576, this is 536. */ #define TCP_MSS 536 /* * Options for use with [gs]etsockopt at the TCP level. * * Note: Some of the TCP_ namespace has conflict with and * and is exposed through <xti.h>. (It also requires exposing * options not implemented). The options with potential * for conflicts use #ifndef guards. */ #ifndef TCP_NODELAY #define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */ #endif #ifndef TCP_MAXSEG #define TCP_MAXSEG 0x02 /* set maximum segment size */ #endif #ifndef TCP_KEEPALIVE #define TCP_KEEPALIVE 0x8 /* set keepalive timer */ #endif #define TCP_NOTIFY_THRESHOLD 0x10 #define TCP_ABORT_THRESHOLD 0x11 #define TCP_CONN_NOTIFY_THRESHOLD 0x12 #define TCP_CONN_ABORT_THRESHOLD 0x13 #define TCP_RECVDSTADDR 0x14 #define TCP_INIT_CWND 0x15 #define TCP_KEEPALIVE_THRESHOLD 0x16 #define TCP_KEEPALIVE_ABORT_THRESHOLD 0x17 #define TCP_CORK 0x18 #define TCP_RTO_INITIAL 0x19 #define TCP_RTO_MIN 0x1A #define TCP_RTO_MAX 0x1B #define TCP_LINGER2 0x1C /* gap for expansion of ``standard'' options */ #define TCP_ANONPRIVBIND 0x20 /* for internal use only */ #define TCP_EXCLBIND 0x21 /* for internal use only */ #define TCP_KEEPIDLE 0x22 #define TCP_KEEPCNT 0x23 #define TCP_KEEPINTVL 0x24 #define TCP_CONGESTION 0x25 #define TCP_QUICKACK 0x26 /* enable/disable quick acks */ #define TCP_MD5SIG 0x27 #ifdef __cplusplus } #endif #endif /* _NETINET_TCP_H */
