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.
- * 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. */
- #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;
- };
- #endif /* Misc. */
- #endif /* netinet/tcp.h */