haiku/headers/posix/netinet/tcp.h

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/*
* Copyright (c) 1982, 1986, 1993
*The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
*
* This product includes software developed by the University of
* California, Berkeley and its contributors.
*
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
*/
#ifndef NETINET_TCP_H
#define NETINET_TCP_H
#include <stdint.h>
typedef uint32_t tcp_seq;
struct tcphdr {
uint16_t th_sport; /* src port */
uint16_t th_dport; /* dest. port */
tcp_seq th_seq; /* seq number */
tcp_seq th_ack; /* ack number */
#if B_HOST_IS_BENDIAN
uint8_t th_off:4,
th_x2:4;
#else
uint8_t th_x2:4, /* unused */
th_off:4; /* data offset */
#endif
uint8_t th_flags; /* ACK, FIN, PUSH, RST, SYN, URG */
uint16_t th_win; /* advertised window */
uint16_t th_sum; /* checksum */
uint16_t th_urp; /* urgent offset */
} _PACKED;
#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 TCPOPT_EOL 0
#define TCPOPT_NOP 1
#define TCPOPT_MAXSEG 2
#define TCPOPT_WINDOW 3
#define TCPOPT_SACK_PERMITTED 4 /* Experimental */
#define TCPOPT_SACK 5 /* Experimental */
#define TCPOPT_TIMESTAMP 8
#define TCPOPT_SIGNATURE 19
#define MAX_TCPOPTLEN 40 /* Absolute maximum TCP options len */
#define TCPOLEN_MAXSEG 4
#define TCPOLEN_WINDOW 3
#define TCPOLEN_SACK 8 /* 2*sizeof(tcp_seq) */
#define TCPOLEN_SACK_PERMITTED 2
#define TCPOLEN_TIMESTAMP 10
#define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2) /* appendix A */
#define TCPOLEN_SIGNATURE 18
#define TCPOPT_TSTAMP_HDR \
(TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP)
#define TCP_MSS 512
#define TCP_MAXWIN 65535
#define TCP_MAX_WINSHIFT 14
#endif /* NETINET_TCP_H */