| /* |
| * 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. */ |
| #define TCP_ZEROCOPY_RECEIVE 35 |
| #define TCP_INQ 36 /* Notify bytes available to read |
| as a cmsg on read. */ |
| #define TCP_CM_INQ TCP_INQ |
| |
| #define TCP_REPAIR_ON 1 |
| #define TCP_REPAIR_OFF 0 |
| #define TCP_REPAIR_OFF_NO_WP -1 |
| |
| #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; |
| }; |
| |
| /* For use with TCP_ZEROCOPY_RECEIVE. */ |
| struct tcp_zerocopy_receive |
| { |
| uint64_t address; /* In: address of mapping. */ |
| uint32_t length; /* In/out: number of bytes to map/mapped. */ |
| uint32_t recv_skip_hint; /* Out: amount of bytes to skip. */ |
| }; |
| |
| #endif /* Misc. */ |
| |
| #endif /* netinet/tcp.h */ |
