/*
|
* 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) */
|
#define TCP_COOKIE_TRANSACTIONS 15 /* TCP Cookie Transactions */
|
#define TCP_THIN_LINEAR_TIMEOUTS 16 /* Use linear timeouts for thin streams*/
|
#define TCP_THIN_DUPACK 17 /* Fast retrans. after 1 dupack */
|
#define TCP_USER_TIMEOUT 18 /* How long for loss retry before timeout */
|
#define TCP_REPAIR 19 /* TCP sock is under repair right now */
|
#define TCP_REPAIR_QUEUE 20 /* Set TCP queue to repair */
|
#define TCP_QUEUE_SEQ 21 /* Set sequence number of repaired queue. */
|
#define TCP_REPAIR_OPTIONS 22 /* Repair TCP connection options */
|
#define TCP_FASTOPEN 23 /* Enable FastOpen on listeners */
|
#define TCP_TIMESTAMP 24 /* TCP time stamp */
|
#define TCP_NOTSENT_LOWAT 25 /* Limit number of unsent bytes in
|
write queue. */
|
#define TCP_CC_INFO 26 /* Get Congestion Control
|
(optional) info. */
|
#define TCP_SAVE_SYN 27 /* Record SYN headers for new
|
connections. */
|
#define TCP_SAVED_SYN 28 /* Get SYN headers recorded for
|
connection. */
|
|
#ifdef __USE_MISC
|
# include <sys/types.h>
|
# include <sys/socket.h>
|
|
typedef u_int32_t tcp_seq;
|
/*
|
* TCP header.
|
* Per RFC 793, September, 1981.
|
*/
|
struct tcphdr
|
{
|
__extension__ union
|
{
|
struct
|
{
|
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 */
|
};
|
struct
|
{
|
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;
|
};
|
};
|
};
|
|
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 /* ECN was negociated at TCP session init */
|
# define TCPI_OPT_ECN_SEEN 16 /* we received at least one packet with ECT */
|
# define TCPI_OPT_SYN_DATA 32 /* SYN-ACK acked data in SYN sent or rcvd */
|
|
/* 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 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). */
|
};
|
|
/* For socket repair options. */
|
struct tcp_repair_opt
|
{
|
u_int32_t opt_code;
|
u_int32_t opt_val;
|
};
|
|
/* Queue to repair, for TCP_REPAIR_QUEUE. */
|
enum
|
{
|
TCP_NO_QUEUE,
|
TCP_RECV_QUEUE,
|
TCP_SEND_QUEUE,
|
TCP_QUEUES_NR,
|
};
|
|
/* For cookie transactions socket options. */
|
#define TCP_COOKIE_MIN 8 /* 64-bits */
|
#define TCP_COOKIE_MAX 16 /* 128-bits */
|
#define TCP_COOKIE_PAIR_SIZE (2*TCP_COOKIE_MAX)
|
|
/* Flags for both getsockopt and setsockopt */
|
#define TCP_COOKIE_IN_ALWAYS (1 << 0) /* Discard SYN without cookie */
|
#define TCP_COOKIE_OUT_NEVER (1 << 1) /* Prohibit outgoing cookies,
|
* supercedes everything. */
|
|
/* Flags for getsockopt */
|
#define TCP_S_DATA_IN (1 << 2) /* Was data received? */
|
#define TCP_S_DATA_OUT (1 << 3) /* Was data sent? */
|
|
#define TCP_MSS_DEFAULT 536U /* IPv4 (RFC1122, RFC2581) */
|
#define TCP_MSS_DESIRED 1220U /* IPv6 (tunneled), EDNS0 (RFC3226) */
|
|
struct tcp_cookie_transactions
|
{
|
u_int16_t tcpct_flags;
|
u_int8_t __tcpct_pad1;
|
u_int8_t tcpct_cookie_desired;
|
u_int16_t tcpct_s_data_desired;
|
u_int16_t tcpct_used;
|
u_int8_t tcpct_value[TCP_MSS_DEFAULT];
|
};
|
|
#endif /* Misc. */
|
|
#endif /* netinet/tcp.h */
|
