haiku/headers/posix/netinet/tcp.h

84 lines
1.8 KiB
C

/*
* Copyright 2006-2012 Haiku, Inc. All Rights Reserved.
* Distributed under the terms of the MIT License.
*/
#ifndef NETINET_TCP_H
#define NETINET_TCP_H
#include <endian.h>
#include <stdint.h>
struct tcphdr {
uint16_t th_sport; /* source port */
uint16_t th_dport; /* destination port */
uint32_t th_seq;
uint32_t th_ack;
#if BIG_ENDIAN
uint8_t th_off : 4; /* data offset */
uint8_t th_x2 : 4; /* unused */
#else
uint8_t th_x2 : 4;
uint8_t th_off : 4;
#endif
uint8_t th_flags;
uint16_t th_win;
uint16_t th_sum;
uint16_t th_urp; /* end of urgent data offset */
} _PACKED;
#if 0
#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
#define TCPOPT_EOL 0
#define TCPOPT_NOP 1
#define TCPOPT_MAXSEG 2
#define TCPOPT_WINDOW 3
#define TCPOPT_SACK_PERMITTED 4
#define TCPOPT_SACK 5
#define TCPOPT_TIMESTAMP 8
#define TCPOPT_SIGNATURE 19
#define MAX_TCPOPTLEN 40
/* absolute maximum TCP options length */
#define TCPOLEN_MAXSEG 4
#define TCPOLEN_WINDOW 3
#define TCPOLEN_SACK 8
#define TCPOLEN_SACK_PERMITTED 2
#define TCPOLEN_TIMESTAMP 10
#define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP + 2)
/* see RFC 1323, appendix A */
#define TCPOLEN_SIGNATURE 18
#define TCPOPT_TSTAMP_HDR \
(TCPOPT_NOP << 24 | TCPOPT_NOP << 16 | TCPOPT_TIMESTAMP << 8 | TCPOLEN_TIMESTAMP)
#define TCP_MSS 536
#define TCP_MAXWIN 65535
#define TCP_MAX_WINSHIFT 14
#endif
/* options that can be set using setsockopt() and level IPPROTO_TCP */
#define TCP_NODELAY 0x01
/* don't delay sending smaller packets */
#define TCP_MAXSEG 0x02
/* set maximum segment size */
#define TCP_NOPUSH 0x04
/* don't use TH_PUSH */
#define TCP_NOOPT 0x08
/* don't use any TCP options */
#endif /* NETINET_TCP_H */