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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.
* 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.
*
* @(#)tcp.h 8.1 (Berkeley) 6/10/93
*/
#ifndef _NETINET_TCP_H
#define _NETINET_TCP_H 1
#include <features.h>
/*
* User-settable options (used with setsockopt).
*/
#define TCP_NODELAY 1 /* Don't delay send to coalesce packets */
#define TCP_MAXSEG 2 /* Set maximum segment size */
#define TCP_CORK 3 /* Control sending of partial frames */
#define TCP_KEEPIDLE 4 /* Start keeplives after this period */
#define TCP_KEEPINTVL 5 /* Interval between keepalives */
#define TCP_KEEPCNT 6 /* Number of keepalives before death */
#define TCP_SYNCNT 7 /* Number of SYN retransmits */
#define TCP_LINGER2 8 /* Life time of orphaned FIN-WAIT-2 state */
#define TCP_DEFER_ACCEPT 9 /* Wake up listener only when data arrive */
#define TCP_WINDOW_CLAMP 10 /* Bound advertised window */
#define TCP_INFO 11 /* Information about this connection. */
#define TCP_QUICKACK 12 /* Bock/reenable quick ACKs. */
#define TCP_CONGESTION 13 /* Congestion control algorithm. */
#define TCP_MD5SIG 14 /* TCP MD5 Signature (RFC2385) */
#ifdef __USE_MISC
# include <sys/types.h>
# ifdef __FAVOR_BSD
typedef u_int32_t tcp_seq;
/*
* TCP header.
* Per RFC 793, September, 1981.
*/
struct tcphdr
{
u_int16_t th_sport; /* source port */
u_int16_t th_dport; /* destination port */
tcp_seq th_seq; /* sequence number */
tcp_seq th_ack; /* acknowledgement number */
# if __BYTE_ORDER == __LITTLE_ENDIAN
u_int8_t th_x2:4; /* (unused) */
u_int8_t th_off:4; /* data offset */
# endif
# if __BYTE_ORDER == __BIG_ENDIAN
u_int8_t th_off:4; /* data offset */
u_int8_t th_x2:4; /* (unused) */
# endif
u_int8_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
u_int16_t th_win; /* window */
u_int16_t th_sum; /* checksum */
u_int16_t th_urp; /* urgent pointer */
};
# else /* !__FAVOR_BSD */
struct tcphdr
{
u_int16_t source;
u_int16_t dest;
u_int32_t seq;
u_int32_t ack_seq;
# if __BYTE_ORDER == __LITTLE_ENDIAN
u_int16_t res1:4;
u_int16_t doff:4;
u_int16_t fin:1;
u_int16_t syn:1;
u_int16_t rst:1;
u_int16_t psh:1;
u_int16_t ack:1;
u_int16_t urg:1;
u_int16_t res2:2;
# elif __BYTE_ORDER == __BIG_ENDIAN
u_int16_t doff:4;
u_int16_t res1:4;
u_int16_t res2:2;
u_int16_t urg:1;
u_int16_t ack:1;
u_int16_t psh:1;
u_int16_t rst:1;
u_int16_t syn:1;
u_int16_t fin:1;
# else
# error "Adjust your <bits/endian.h> defines"
# endif
u_int16_t window;
u_int16_t check;
u_int16_t urg_ptr;
};
# endif /* __FAVOR_BSD */
enum
{
TCP_ESTABLISHED = 1,
TCP_SYN_SENT,
TCP_SYN_RECV,
TCP_FIN_WAIT1,
TCP_FIN_WAIT2,
TCP_TIME_WAIT,
TCP_CLOSE,
TCP_CLOSE_WAIT,
TCP_LAST_ACK,
TCP_LISTEN,
TCP_CLOSING /* now a valid state */
};
# define TCPOPT_EOL 0
# define TCPOPT_NOP 1
# define TCPOPT_MAXSEG 2
# define TCPOLEN_MAXSEG 4
# define TCPOPT_WINDOW 3
# define TCPOLEN_WINDOW 3
# define TCPOPT_SACK_PERMITTED 4 /* Experimental */
# define TCPOLEN_SACK_PERMITTED 2
# define TCPOPT_SACK 5 /* Experimental */
# define TCPOPT_TIMESTAMP 8
# define TCPOLEN_TIMESTAMP 10
# define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2) /* appendix A */
# define TCPOPT_TSTAMP_HDR \
(TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP)
/*
* Default maximum segment size for TCP.
* With an IP MSS of 576, this is 536,
* but 512 is probably more convenient.
* This should be defined as MIN(512, IP_MSS - sizeof (struct tcpiphdr)).
*/
# define TCP_MSS 512
# define TCP_MAXWIN 65535 /* largest value for (unscaled) window */
# define TCP_MAX_WINSHIFT 14 /* maximum window shift */
# define SOL_TCP 6 /* TCP level */
# define TCPI_OPT_TIMESTAMPS 1
# define TCPI_OPT_SACK 2
# define TCPI_OPT_WSCALE 4
# define TCPI_OPT_ECN 8
/* Values for tcpi_state. */
enum tcp_ca_state
{
TCP_CA_Open = 0,
TCP_CA_Disorder = 1,
TCP_CA_CWR = 2,
TCP_CA_Recovery = 3,
TCP_CA_Loss = 4
};
struct tcp_info
{
u_int8_t tcpi_state;
u_int8_t tcpi_ca_state;
u_int8_t tcpi_retransmits;
u_int8_t tcpi_probes;
u_int8_t tcpi_backoff;
u_int8_t tcpi_options;
u_int8_t tcpi_snd_wscale : 4, tcpi_rcv_wscale : 4;
u_int32_t tcpi_rto;
u_int32_t tcpi_ato;
u_int32_t tcpi_snd_mss;
u_int32_t tcpi_rcv_mss;
u_int32_t tcpi_unacked;
u_int32_t tcpi_sacked;
u_int32_t tcpi_lost;
u_int32_t tcpi_retrans;
u_int32_t tcpi_fackets;
/* Times. */
u_int32_t tcpi_last_data_sent;
u_int32_t tcpi_last_ack_sent; /* Not remembered, sorry. */
u_int32_t tcpi_last_data_recv;
u_int32_t tcpi_last_ack_recv;
/* Metrics. */
u_int32_t tcpi_pmtu;
u_int32_t tcpi_rcv_ssthresh;
u_int32_t tcpi_rtt;
u_int32_t tcpi_rttvar;
u_int32_t tcpi_snd_ssthresh;
u_int32_t tcpi_snd_cwnd;
u_int32_t tcpi_advmss;
u_int32_t tcpi_reordering;
u_int32_t tcpi_rcv_rtt;
u_int32_t tcpi_rcv_space;
u_int32_t tcpi_total_retrans;
};
/* For TCP_MD5SIG socket option. */
#define TCP_MD5SIG_MAXKEYLEN 80
struct tcp_md5sig
{
struct __kernel_sockaddr_storage tcpm_addr; /* Address associated. */
u_int16_t __tcpm_pad1; /* Zero. */
u_int16_t tcpm_keylen; /* Key length. */
u_int32_t __tcpm_pad2; /* Zero. */
u_int8_t tcpm_key[TCP_MD5SIG_MAXKEYLEN]; /* Key (binary). */
};
#endif /* Misc. */
#endif /* netinet/tcp.h */
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