--- /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
+ */
+
+#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. */
+#define TCP_REPAIR_WINDOW 29 /* Get/set window parameters. */
+#define TCP_FASTOPEN_CONNECT 30 /* Attempt FastOpen with connect. */
+#define TCP_ULP 31 /* Attach a ULP to a TCP connection. */
+#define TCP_MD5SIG_EXT 32 /* TCP MD5 Signature with extensions. */
+#define TCP_FASTOPEN_KEY 33 /* Set the key for Fast Open (cookie). */
+#define TCP_FASTOPEN_NO_COOKIE 34 /* Enable TFO without a TFO cookie. */
+
+#ifdef __USE_MISC
+# include <sys/types.h>
+# include <sys/socket.h>
+# include <stdint.h>
+
+typedef uint32_t tcp_seq;
+/*
+ * TCP header.
+ * Per RFC 793, September, 1981.
+ */
+struct tcphdr
+ {
+ __extension__ union
+ {
+ struct
+ {
+ uint16_t th_sport; /* source port */
+ uint16_t th_dport; /* destination port */
+ tcp_seq th_seq; /* sequence number */
+ tcp_seq th_ack; /* acknowledgement number */
+# if __BYTE_ORDER == __LITTLE_ENDIAN
+ uint8_t th_x2:4; /* (unused) */
+ uint8_t th_off:4; /* data offset */
+# endif
+# if __BYTE_ORDER == __BIG_ENDIAN
+ uint8_t th_off:4; /* data offset */
+ uint8_t th_x2:4; /* (unused) */
+# endif
+ uint8_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
+ uint16_t th_win; /* window */
+ uint16_t th_sum; /* checksum */
+ uint16_t th_urp; /* urgent pointer */
+ };
+ struct
+ {
+ uint16_t source;
+ uint16_t dest;
+ uint32_t seq;
+ uint32_t ack_seq;
+# if __BYTE_ORDER == __LITTLE_ENDIAN
+ uint16_t res1:4;
+ uint16_t doff:4;
+ uint16_t fin:1;
+ uint16_t syn:1;
+ uint16_t rst:1;
+ uint16_t psh:1;
+ uint16_t ack:1;
+ uint16_t urg:1;
+ uint16_t res2:2;
+# elif __BYTE_ORDER == __BIG_ENDIAN
+ uint16_t doff:4;
+ uint16_t res1:4;
+ uint16_t res2:2;
+ uint16_t urg:1;
+ uint16_t ack:1;
+ uint16_t psh:1;
+ uint16_t rst:1;
+ uint16_t syn:1;
+ uint16_t fin:1;
+# else
+# error "Adjust your <bits/endian.h> defines"
+# endif
+ uint16_t window;
+ uint16_t check;
+ uint16_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
+{
+ uint8_t tcpi_state;
+ uint8_t tcpi_ca_state;
+ uint8_t tcpi_retransmits;
+ uint8_t tcpi_probes;
+ uint8_t tcpi_backoff;
+ uint8_t tcpi_options;
+ uint8_t tcpi_snd_wscale : 4, tcpi_rcv_wscale : 4;
+
+ uint32_t tcpi_rto;
+ uint32_t tcpi_ato;
+ uint32_t tcpi_snd_mss;
+ uint32_t tcpi_rcv_mss;
+
+ uint32_t tcpi_unacked;
+ uint32_t tcpi_sacked;
+ uint32_t tcpi_lost;
+ uint32_t tcpi_retrans;
+ uint32_t tcpi_fackets;
+
+ /* Times. */
+ uint32_t tcpi_last_data_sent;
+ uint32_t tcpi_last_ack_sent; /* Not remembered, sorry. */
+ uint32_t tcpi_last_data_recv;
+ uint32_t tcpi_last_ack_recv;
+
+ /* Metrics. */
+ uint32_t tcpi_pmtu;
+ uint32_t tcpi_rcv_ssthresh;
+ uint32_t tcpi_rtt;
+ uint32_t tcpi_rttvar;
+ uint32_t tcpi_snd_ssthresh;
+ uint32_t tcpi_snd_cwnd;
+ uint32_t tcpi_advmss;
+ uint32_t tcpi_reordering;
+
+ uint32_t tcpi_rcv_rtt;
+ uint32_t tcpi_rcv_space;
+
+ uint32_t tcpi_total_retrans;
+};
+
+
+/* For TCP_MD5SIG socket option. */
+#define TCP_MD5SIG_MAXKEYLEN 80
+
+/* tcp_md5sig extension flags for TCP_MD5SIG_EXT. */
+#define TCP_MD5SIG_FLAG_PREFIX 1 /* Address prefix length. */
+
+struct tcp_md5sig
+{
+ struct sockaddr_storage tcpm_addr; /* Address associated. */
+ uint8_t tcpm_flags; /* Extension flags. */
+ uint8_t tcpm_prefixlen; /* Address prefix. */
+ uint16_t tcpm_keylen; /* Key length. */
+ uint32_t __tcpm_pad; /* Zero. */
+ uint8_t tcpm_key[TCP_MD5SIG_MAXKEYLEN]; /* Key (binary). */
+};
+
+/* For socket repair options. */
+struct tcp_repair_opt
+{
+ uint32_t opt_code;
+ uint32_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
+{
+ uint16_t tcpct_flags;
+ uint8_t __tcpct_pad1;
+ uint8_t tcpct_cookie_desired;
+ uint16_t tcpct_s_data_desired;
+ uint16_t tcpct_used;
+ uint8_t tcpct_value[TCP_MSS_DEFAULT];
+};
+
+/* For use with TCP_REPAIR_WINDOW. */
+struct tcp_repair_window
+{
+ uint32_t snd_wl1;
+ uint32_t snd_wnd;
+ uint32_t max_window;
+ uint32_t rcv_wnd;
+ uint32_t rcv_wup;
+};
+
+#endif /* Misc. */
+
+#endif /* netinet/tcp.h */
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