+++ /dev/null
-/*-
- * 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
- * $FreeBSD: src/sys/netinet/tcp.h,v 1.40.2.2 2008/07/31 06:10:25 kmacy Exp $
- */
-
-#ifndef _NETINET_TCP_H_
-#define _NETINET_TCP_H_
-
-#include <sys/cdefs.h>
-
-#define __BSD_VISIBLE 1
-
-#if __BSD_VISIBLE
-
-typedef u_int32_t tcp_seq;
-
-#define tcp6_seq tcp_seq /* for KAME src sync over BSD*'s */
-#define tcp6hdr tcphdr /* for KAME src sync over BSD*'s */
-
-/*
- * TCP header.
- * Per RFC 793, September, 1981.
- */
-struct tcphdr {
- u_short th_sport; /* source port */
- u_short th_dport; /* destination port */
- tcp_seq th_seq; /* sequence number */
- tcp_seq th_ack; /* acknowledgement number */
-#if BYTE_ORDER == LITTLE_ENDIAN
- u_int th_x2:4, /* (unused) */
- th_off:4; /* data offset */
-#endif
-#if BYTE_ORDER == BIG_ENDIAN
- u_int th_off:4, /* data offset */
- th_x2:4; /* (unused) */
-#endif
- u_char 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
-#define TH_FLAGS (TH_FIN|TH_SYN|TH_RST|TH_PUSH|TH_ACK|TH_URG|TH_ECE|TH_CWR)
-#define PRINT_TH_FLAGS "\20\1FIN\2SYN\3RST\4PUSH\5ACK\6URG\7ECE\10CWR"
-
- u_short th_win; /* window */
- u_short th_sum; /* checksum */
- u_short th_urp; /* urgent pointer */
-};
-
-#define TCPOPT_EOL 0
-#define TCPOLEN_EOL 1
-#define TCPOPT_PAD 0 /* padding after EOL */
-#define TCPOLEN_PAD 1
-#define TCPOPT_NOP 1
-#define TCPOLEN_NOP 1
-#define TCPOPT_MAXSEG 2
-#define TCPOLEN_MAXSEG 4
-#define TCPOPT_WINDOW 3
-#define TCPOLEN_WINDOW 3
-#define TCPOPT_SACK_PERMITTED 4
-#define TCPOLEN_SACK_PERMITTED 2
-#define TCPOPT_SACK 5
-#define TCPOLEN_SACKHDR 2
-#define TCPOLEN_SACK 8 /* 2*sizeof(tcp_seq) */
-#define TCPOPT_TIMESTAMP 8
-#define TCPOLEN_TIMESTAMP 10
-#define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2) /* appendix A */
-#define TCPOPT_SIGNATURE 19 /* Keyed MD5: RFC 2385 */
-#define TCPOLEN_SIGNATURE 18
-
-/* Miscellaneous constants */
-#define MAX_SACK_BLKS 6 /* Max # SACK blocks stored at receiver side */
-#define TCP_MAX_SACK 4 /* MAX # SACKs sent in any segment */
-
-
-/*
- * Default maximum segment size for TCP.
- * With an IP MTU 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
-/*
- * TCP_MINMSS is defined to be 216 which is fine for the smallest
- * link MTU (256 bytes, AX.25 packet radio) in the Internet.
- * However it is very unlikely to come across such low MTU interfaces
- * these days (anno dato 2003).
- * See tcp_subr.c tcp_minmss SYSCTL declaration for more comments.
- * Setting this to "0" disables the minmss check.
- */
-#define TCP_MINMSS 216
-
-/*
- * Default maximum segment size for TCP6.
- * With an IP6 MSS of 1280, this is 1220,
- * but 1024 is probably more convenient. (xxx kazu in doubt)
- * This should be defined as MIN(1024, IP6_MSS - sizeof (struct tcpip6hdr))
- */
-#define TCP6_MSS 1024
-
-#define TCP_MAXWIN 65535 /* largest value for (unscaled) window */
-#define TTCP_CLIENT_SND_WND 4096 /* dflt send window for T/TCP client */
-
-#define TCP_MAX_WINSHIFT 14 /* maximum window shift */
-
-#define TCP_MAXBURST 4 /* maximum segments in a burst */
-
-#define TCP_MAXHLEN (0xf<<2) /* max length of header in bytes */
-#define TCP_MAXOLEN (TCP_MAXHLEN - sizeof(struct tcphdr))
- /* max space left for options */
-#endif /* __BSD_VISIBLE */
-
-/*
- * User-settable options (used with setsockopt).
- */
-#define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */
-#if __BSD_VISIBLE
-#define TCP_MAXSEG 0x02 /* set maximum segment size */
-#define TCP_NOPUSH 0x04 /* don't push last block of write */
-#define TCP_NOOPT 0x08 /* don't use TCP options */
-#define TCP_MD5SIG 0x10 /* use MD5 digests (RFC2385) */
-#define TCP_INFO 0x20 /* retrieve tcp_info structure */
-#define TCP_CONGESTION 0x40 /* get/set congestion control algorithm */
-
-#define TCP_CA_NAME_MAX 16 /* max congestion control name length */
-
-#define TCPI_OPT_TIMESTAMPS 0x01
-#define TCPI_OPT_SACK 0x02
-#define TCPI_OPT_WSCALE 0x04
-#define TCPI_OPT_ECN 0x08
-#define TCPI_OPT_TOE 0x10
-
-/*
- * The TCP_INFO socket option comes from the Linux 2.6 TCP API, and permits
- * the caller to query certain information about the state of a TCP
- * connection. We provide an overlapping set of fields with the Linux
- * implementation, but since this is a fixed size structure, room has been
- * left for growth. In order to maximize potential future compatibility with
- * the Linux API, the same variable names and order have been adopted, and
- * padding left to make room for omitted fields in case they are added later.
- *
- * XXX: This is currently an unstable ABI/API, in that it is expected to
- * change.
- */
-struct tcp_info {
- u_int8_t tcpi_state; /* TCP FSM 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; /* Options enabled on conn. */
- u_int8_t tcpi_snd_wscale:4, /* RFC1323 send shift value. */
- tcpi_rcv_wscale:4; /* RFC1323 recv shift value. */
-
- 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; measurements in usecs. */
- u_int32_t __tcpi_last_data_sent;
- u_int32_t __tcpi_last_ack_sent; /* Also unimpl. on Linux? */
- u_int32_t __tcpi_last_data_recv;
- u_int32_t __tcpi_last_ack_recv;
-
- /* Metrics; variable units. */
- u_int32_t __tcpi_pmtu;
- u_int32_t __tcpi_rcv_ssthresh;
- u_int32_t tcpi_rtt; /* Smoothed RTT in usecs. */
- u_int32_t tcpi_rttvar; /* RTT variance in usecs. */
- u_int32_t tcpi_snd_ssthresh; /* Slow start threshold. */
- u_int32_t tcpi_snd_cwnd; /* Send congestion window. */
- u_int32_t __tcpi_advmss;
- u_int32_t __tcpi_reordering;
-
- u_int32_t __tcpi_rcv_rtt;
- u_int32_t tcpi_rcv_space; /* Advertised recv window. */
-
- /* FreeBSD extensions to tcp_info. */
- u_int32_t tcpi_snd_wnd; /* Advertised send window. */
- u_int32_t tcpi_snd_bwnd; /* Bandwidth send window. */
- u_int32_t tcpi_snd_nxt; /* Next egress seqno */
- u_int32_t tcpi_rcv_nxt; /* Next ingress seqno */
- u_int32_t tcpi_toe_tid; /* HWTID for TOE endpoints */
-
- /* Padding to grow without breaking ABI. */
- u_int32_t __tcpi_pad[29]; /* Padding. */
-};
-#endif
-
-#endif /* !_NETINET_TCP_H_ */
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