/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ /* * INET An implementation of the TCP/IP protocol suite for the LINUX * operating system. INET is implemented using the BSD Socket * interface as the means of communication with the user level. * * Definitions for the TCP protocol. * * Version: @(#)tcp.h 1.0.2 04/28/93 * * Author: Fred N. van Kempen, <[email protected]> * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version * 2 of the License, or (at your option) any later version. */ #ifndef _UAPI_LINUX_TCP_H #define _UAPI_LINUX_TCP_H #include <linux/types.h> #include <asm/byteorder.h> #include <linux/socket.h> struct tcphdr { … }; /* * The union cast uses a gcc extension to avoid aliasing problems * (union is compatible to any of its members) * This means this part of the code is -fstrict-aliasing safe now. */ tcp_word_hdr; #define tcp_flag_word(tp) … enum { … }; /* * TCP general constants */ #define TCP_MSS_DEFAULT … #define TCP_MSS_DESIRED … /* TCP socket options */ #define TCP_NODELAY … #define TCP_MAXSEG … #define TCP_CORK … #define TCP_KEEPIDLE … #define TCP_KEEPINTVL … #define TCP_KEEPCNT … #define TCP_SYNCNT … #define TCP_LINGER2 … #define TCP_DEFER_ACCEPT … #define TCP_WINDOW_CLAMP … #define TCP_INFO … #define TCP_QUICKACK … #define TCP_CONGESTION … #define TCP_MD5SIG … #define TCP_THIN_LINEAR_TIMEOUTS … #define TCP_THIN_DUPACK … #define TCP_USER_TIMEOUT … #define TCP_REPAIR … #define TCP_REPAIR_QUEUE … #define TCP_QUEUE_SEQ … #define TCP_REPAIR_OPTIONS … #define TCP_FASTOPEN … #define TCP_TIMESTAMP … #define TCP_NOTSENT_LOWAT … #define TCP_CC_INFO … #define TCP_SAVE_SYN … #define TCP_SAVED_SYN … #define TCP_REPAIR_WINDOW … #define TCP_FASTOPEN_CONNECT … #define TCP_ULP … #define TCP_MD5SIG_EXT … #define TCP_FASTOPEN_KEY … #define TCP_FASTOPEN_NO_COOKIE … #define TCP_ZEROCOPY_RECEIVE … #define TCP_INQ … #define TCP_CM_INQ … #define TCP_TX_DELAY … #define TCP_AO_ADD_KEY … #define TCP_AO_DEL_KEY … #define TCP_AO_INFO … #define TCP_AO_GET_KEYS … #define TCP_AO_REPAIR … #define TCP_IS_MPTCP … #define TCP_REPAIR_ON … #define TCP_REPAIR_OFF … #define TCP_REPAIR_OFF_NO_WP … struct tcp_repair_opt { … }; struct tcp_repair_window { … }; enum { … }; /* why fastopen failed from client perspective */ enum tcp_fastopen_client_fail { … }; /* for TCP_INFO socket option */ #define TCPI_OPT_TIMESTAMPS … #define TCPI_OPT_SACK … #define TCPI_OPT_WSCALE … #define TCPI_OPT_ECN … #define TCPI_OPT_ECN_SEEN … #define TCPI_OPT_SYN_DATA … #define TCPI_OPT_USEC_TS … /* * Sender's congestion state indicating normal or abnormal situations * in the last round of packets sent. The state is driven by the ACK * information and timer events. */ enum tcp_ca_state { … }; struct tcp_info { … }; /* netlink attributes types for SCM_TIMESTAMPING_OPT_STATS */ enum { … }; /* for TCP_MD5SIG socket option */ #define TCP_MD5SIG_MAXKEYLEN … /* tcp_md5sig extension flags for TCP_MD5SIG_EXT */ #define TCP_MD5SIG_FLAG_PREFIX … #define TCP_MD5SIG_FLAG_IFINDEX … struct tcp_md5sig { … }; /* INET_DIAG_MD5SIG */ struct tcp_diag_md5sig { … }; #define TCP_AO_MAXKEYLEN … #define TCP_AO_KEYF_IFINDEX … #define TCP_AO_KEYF_EXCLUDE_OPT … struct tcp_ao_add { … } __attribute__((aligned …)); struct tcp_ao_del { … } __attribute__((aligned …)); struct tcp_ao_info_opt { … } __attribute__((aligned …)); struct tcp_ao_getsockopt { … } __attribute__((aligned …)); struct tcp_ao_repair { … } __attribute__((aligned …)); /* setsockopt(fd, IPPROTO_TCP, TCP_ZEROCOPY_RECEIVE, ...) */ #define TCP_RECEIVE_ZEROCOPY_FLAG_TLB_CLEAN_HINT … struct tcp_zerocopy_receive { … }; #endif /* _UAPI_LINUX_TCP_H */
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