1e2be04c7SGreg Kroah-Hartman /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2607ca46eSDavid Howells /* 3607ca46eSDavid Howells * INET An implementation of the TCP/IP protocol suite for the LINUX 4607ca46eSDavid Howells * operating system. INET is implemented using the BSD Socket 5607ca46eSDavid Howells * interface as the means of communication with the user level. 6607ca46eSDavid Howells * 7607ca46eSDavid Howells * Definitions for the TCP protocol. 8607ca46eSDavid Howells * 9607ca46eSDavid Howells * Version: @(#)tcp.h 1.0.2 04/28/93 10607ca46eSDavid Howells * 11607ca46eSDavid Howells * Author: Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> 12607ca46eSDavid Howells * 13607ca46eSDavid Howells * This program is free software; you can redistribute it and/or 14607ca46eSDavid Howells * modify it under the terms of the GNU General Public License 15607ca46eSDavid Howells * as published by the Free Software Foundation; either version 16607ca46eSDavid Howells * 2 of the License, or (at your option) any later version. 17607ca46eSDavid Howells */ 18607ca46eSDavid Howells #ifndef _UAPI_LINUX_TCP_H 19607ca46eSDavid Howells #define _UAPI_LINUX_TCP_H 20607ca46eSDavid Howells 21607ca46eSDavid Howells #include <linux/types.h> 22607ca46eSDavid Howells #include <asm/byteorder.h> 23607ca46eSDavid Howells #include <linux/socket.h> 24607ca46eSDavid Howells 25607ca46eSDavid Howells struct tcphdr { 26607ca46eSDavid Howells __be16 source; 27607ca46eSDavid Howells __be16 dest; 28607ca46eSDavid Howells __be32 seq; 29607ca46eSDavid Howells __be32 ack_seq; 30607ca46eSDavid Howells #if defined(__LITTLE_ENDIAN_BITFIELD) 31607ca46eSDavid Howells __u16 res1:4, 32607ca46eSDavid Howells doff:4, 33607ca46eSDavid Howells fin:1, 34607ca46eSDavid Howells syn:1, 35607ca46eSDavid Howells rst:1, 36607ca46eSDavid Howells psh:1, 37607ca46eSDavid Howells ack:1, 38607ca46eSDavid Howells urg:1, 39607ca46eSDavid Howells ece:1, 40607ca46eSDavid Howells cwr:1; 41607ca46eSDavid Howells #elif defined(__BIG_ENDIAN_BITFIELD) 42607ca46eSDavid Howells __u16 doff:4, 43607ca46eSDavid Howells res1:4, 44607ca46eSDavid Howells cwr:1, 45607ca46eSDavid Howells ece:1, 46607ca46eSDavid Howells urg:1, 47607ca46eSDavid Howells ack:1, 48607ca46eSDavid Howells psh:1, 49607ca46eSDavid Howells rst:1, 50607ca46eSDavid Howells syn:1, 51607ca46eSDavid Howells fin:1; 52607ca46eSDavid Howells #else 53607ca46eSDavid Howells #error "Adjust your <asm/byteorder.h> defines" 54607ca46eSDavid Howells #endif 55607ca46eSDavid Howells __be16 window; 56607ca46eSDavid Howells __sum16 check; 57607ca46eSDavid Howells __be16 urg_ptr; 58607ca46eSDavid Howells }; 59607ca46eSDavid Howells 60607ca46eSDavid Howells /* 61607ca46eSDavid Howells * The union cast uses a gcc extension to avoid aliasing problems 62607ca46eSDavid Howells * (union is compatible to any of its members) 63607ca46eSDavid Howells * This means this part of the code is -fstrict-aliasing safe now. 64607ca46eSDavid Howells */ 65607ca46eSDavid Howells union tcp_word_hdr { 66607ca46eSDavid Howells struct tcphdr hdr; 67607ca46eSDavid Howells __be32 words[5]; 68607ca46eSDavid Howells }; 69607ca46eSDavid Howells 70607ca46eSDavid Howells #define tcp_flag_word(tp) (((union tcp_word_hdr *)(tp))->words[3]) 71607ca46eSDavid Howells 72607ca46eSDavid Howells enum { 73607ca46eSDavid Howells TCP_FLAG_CWR = __constant_cpu_to_be32(0x00800000), 74607ca46eSDavid Howells TCP_FLAG_ECE = __constant_cpu_to_be32(0x00400000), 75607ca46eSDavid Howells TCP_FLAG_URG = __constant_cpu_to_be32(0x00200000), 76607ca46eSDavid Howells TCP_FLAG_ACK = __constant_cpu_to_be32(0x00100000), 77607ca46eSDavid Howells TCP_FLAG_PSH = __constant_cpu_to_be32(0x00080000), 78607ca46eSDavid Howells TCP_FLAG_RST = __constant_cpu_to_be32(0x00040000), 79607ca46eSDavid Howells TCP_FLAG_SYN = __constant_cpu_to_be32(0x00020000), 80607ca46eSDavid Howells TCP_FLAG_FIN = __constant_cpu_to_be32(0x00010000), 81607ca46eSDavid Howells TCP_RESERVED_BITS = __constant_cpu_to_be32(0x0F000000), 82607ca46eSDavid Howells TCP_DATA_OFFSET = __constant_cpu_to_be32(0xF0000000) 83607ca46eSDavid Howells }; 84607ca46eSDavid Howells 85607ca46eSDavid Howells /* 86607ca46eSDavid Howells * TCP general constants 87607ca46eSDavid Howells */ 88607ca46eSDavid Howells #define TCP_MSS_DEFAULT 536U /* IPv4 (RFC1122, RFC2581) */ 89607ca46eSDavid Howells #define TCP_MSS_DESIRED 1220U /* IPv6 (tunneled), EDNS0 (RFC3226) */ 90607ca46eSDavid Howells 91607ca46eSDavid Howells /* TCP socket options */ 92607ca46eSDavid Howells #define TCP_NODELAY 1 /* Turn off Nagle's algorithm. */ 93607ca46eSDavid Howells #define TCP_MAXSEG 2 /* Limit MSS */ 94607ca46eSDavid Howells #define TCP_CORK 3 /* Never send partially complete segments */ 95607ca46eSDavid Howells #define TCP_KEEPIDLE 4 /* Start keeplives after this period */ 96607ca46eSDavid Howells #define TCP_KEEPINTVL 5 /* Interval between keepalives */ 97607ca46eSDavid Howells #define TCP_KEEPCNT 6 /* Number of keepalives before death */ 98607ca46eSDavid Howells #define TCP_SYNCNT 7 /* Number of SYN retransmits */ 99607ca46eSDavid Howells #define TCP_LINGER2 8 /* Life time of orphaned FIN-WAIT-2 state */ 100607ca46eSDavid Howells #define TCP_DEFER_ACCEPT 9 /* Wake up listener only when data arrive */ 101607ca46eSDavid Howells #define TCP_WINDOW_CLAMP 10 /* Bound advertised window */ 102607ca46eSDavid Howells #define TCP_INFO 11 /* Information about this connection. */ 103607ca46eSDavid Howells #define TCP_QUICKACK 12 /* Block/reenable quick acks */ 104607ca46eSDavid Howells #define TCP_CONGESTION 13 /* Congestion control algorithm */ 105607ca46eSDavid Howells #define TCP_MD5SIG 14 /* TCP MD5 Signature (RFC2385) */ 106607ca46eSDavid Howells #define TCP_THIN_LINEAR_TIMEOUTS 16 /* Use linear timeouts for thin streams*/ 107607ca46eSDavid Howells #define TCP_THIN_DUPACK 17 /* Fast retrans. after 1 dupack */ 108607ca46eSDavid Howells #define TCP_USER_TIMEOUT 18 /* How long for loss retry before timeout */ 109607ca46eSDavid Howells #define TCP_REPAIR 19 /* TCP sock is under repair right now */ 110607ca46eSDavid Howells #define TCP_REPAIR_QUEUE 20 111607ca46eSDavid Howells #define TCP_QUEUE_SEQ 21 112607ca46eSDavid Howells #define TCP_REPAIR_OPTIONS 22 113607ca46eSDavid Howells #define TCP_FASTOPEN 23 /* Enable FastOpen on listeners */ 11493be6ce0SAndrey Vagin #define TCP_TIMESTAMP 24 115c9bee3b7SEric Dumazet #define TCP_NOTSENT_LOWAT 25 /* limit number of unsent bytes in write queue */ 1166e9250f5SEric Dumazet #define TCP_CC_INFO 26 /* Get Congestion Control (optional) info */ 117cd8ae852SEric Dumazet #define TCP_SAVE_SYN 27 /* Record SYN headers for new connections */ 118cd8ae852SEric Dumazet #define TCP_SAVED_SYN 28 /* Get SYN headers recorded for connection */ 119b1ed4c4fSAndrey Vagin #define TCP_REPAIR_WINDOW 29 /* Get/set window parameters */ 12019f6d3f3SWei Wang #define TCP_FASTOPEN_CONNECT 30 /* Attempt FastOpen with connect */ 121734942ccSDave Watson #define TCP_ULP 31 /* Attach a ULP to a TCP connection */ 1228917a777SIvan Delalande #define TCP_MD5SIG_EXT 32 /* TCP MD5 Signature with extensions */ 1231fba70e5SYuchung Cheng #define TCP_FASTOPEN_KEY 33 /* Set the key for Fast Open (cookie) */ 12471c02379SChristoph Paasch #define TCP_FASTOPEN_NO_COOKIE 34 /* Enable TFO without a TFO cookie */ 12505255b82SEric Dumazet #define TCP_ZEROCOPY_RECEIVE 35 126b75eba76SSoheil Hassas Yeganeh #define TCP_INQ 36 /* Notify bytes available to read as a cmsg on read */ 127b75eba76SSoheil Hassas Yeganeh 128b75eba76SSoheil Hassas Yeganeh #define TCP_CM_INQ TCP_INQ 129607ca46eSDavid Howells 130a842fe14SEric Dumazet #define TCP_TX_DELAY 37 /* delay outgoing packets by XX usec */ 131a842fe14SEric Dumazet 1324954f17dSDmitry Safonov #define TCP_AO_ADD_KEY 38 /* Add/Set MKT */ 1334954f17dSDmitry Safonov #define TCP_AO_DEL_KEY 39 /* Delete MKT */ 134ef84703aSDmitry Safonov #define TCP_AO_INFO 40 /* Set/list TCP-AO per-socket options */ 135ef84703aSDmitry Safonov #define TCP_AO_GET_KEYS 41 /* List MKT(s) */ 136*faadfabaSDmitry Safonov #define TCP_AO_REPAIR 42 /* Get/Set SNEs and ISNs */ 137a842fe14SEric Dumazet 13831048d7aSStefan Baranoff #define TCP_REPAIR_ON 1 13931048d7aSStefan Baranoff #define TCP_REPAIR_OFF 0 14031048d7aSStefan Baranoff #define TCP_REPAIR_OFF_NO_WP -1 /* Turn off without window probes */ 14131048d7aSStefan Baranoff 142607ca46eSDavid Howells struct tcp_repair_opt { 143607ca46eSDavid Howells __u32 opt_code; 144607ca46eSDavid Howells __u32 opt_val; 145607ca46eSDavid Howells }; 146607ca46eSDavid Howells 147b1ed4c4fSAndrey Vagin struct tcp_repair_window { 148b1ed4c4fSAndrey Vagin __u32 snd_wl1; 149b1ed4c4fSAndrey Vagin __u32 snd_wnd; 150b1ed4c4fSAndrey Vagin __u32 max_window; 151b1ed4c4fSAndrey Vagin 152b1ed4c4fSAndrey Vagin __u32 rcv_wnd; 153b1ed4c4fSAndrey Vagin __u32 rcv_wup; 154b1ed4c4fSAndrey Vagin }; 155b1ed4c4fSAndrey Vagin 156607ca46eSDavid Howells enum { 157607ca46eSDavid Howells TCP_NO_QUEUE, 158607ca46eSDavid Howells TCP_RECV_QUEUE, 159607ca46eSDavid Howells TCP_SEND_QUEUE, 160607ca46eSDavid Howells TCP_QUEUES_NR, 161607ca46eSDavid Howells }; 162607ca46eSDavid Howells 16348027478SJason Baron /* why fastopen failed from client perspective */ 16448027478SJason Baron enum tcp_fastopen_client_fail { 16548027478SJason Baron TFO_STATUS_UNSPEC, /* catch-all */ 16648027478SJason Baron TFO_COOKIE_UNAVAILABLE, /* if not in TFO_CLIENT_NO_COOKIE mode */ 16748027478SJason Baron TFO_DATA_NOT_ACKED, /* SYN-ACK did not ack SYN data */ 16848027478SJason Baron TFO_SYN_RETRANSMITTED, /* SYN-ACK did not ack SYN data after timeout */ 16948027478SJason Baron }; 17048027478SJason Baron 171607ca46eSDavid Howells /* for TCP_INFO socket option */ 172607ca46eSDavid Howells #define TCPI_OPT_TIMESTAMPS 1 173607ca46eSDavid Howells #define TCPI_OPT_SACK 2 174607ca46eSDavid Howells #define TCPI_OPT_WSCALE 4 175607ca46eSDavid Howells #define TCPI_OPT_ECN 8 /* ECN was negociated at TCP session init */ 176607ca46eSDavid Howells #define TCPI_OPT_ECN_SEEN 16 /* we received at least one packet with ECT */ 1776f73601eSYuchung Cheng #define TCPI_OPT_SYN_DATA 32 /* SYN-ACK acked data in SYN sent or rcvd */ 178a77a0f5cSEric Dumazet #define TCPI_OPT_USEC_TS 64 /* usec timestamps */ 179607ca46eSDavid Howells 180576fd2f7SSoheil Hassas Yeganeh /* 181576fd2f7SSoheil Hassas Yeganeh * Sender's congestion state indicating normal or abnormal situations 182576fd2f7SSoheil Hassas Yeganeh * in the last round of packets sent. The state is driven by the ACK 183576fd2f7SSoheil Hassas Yeganeh * information and timer events. 184576fd2f7SSoheil Hassas Yeganeh */ 185607ca46eSDavid Howells enum tcp_ca_state { 186576fd2f7SSoheil Hassas Yeganeh /* 187576fd2f7SSoheil Hassas Yeganeh * Nothing bad has been observed recently. 188576fd2f7SSoheil Hassas Yeganeh * No apparent reordering, packet loss, or ECN marks. 189576fd2f7SSoheil Hassas Yeganeh */ 190607ca46eSDavid Howells TCP_CA_Open = 0, 191607ca46eSDavid Howells #define TCPF_CA_Open (1<<TCP_CA_Open) 192576fd2f7SSoheil Hassas Yeganeh /* 193576fd2f7SSoheil Hassas Yeganeh * The sender enters disordered state when it has received DUPACKs or 194576fd2f7SSoheil Hassas Yeganeh * SACKs in the last round of packets sent. This could be due to packet 195576fd2f7SSoheil Hassas Yeganeh * loss or reordering but needs further information to confirm packets 196576fd2f7SSoheil Hassas Yeganeh * have been lost. 197576fd2f7SSoheil Hassas Yeganeh */ 198607ca46eSDavid Howells TCP_CA_Disorder = 1, 199607ca46eSDavid Howells #define TCPF_CA_Disorder (1<<TCP_CA_Disorder) 200576fd2f7SSoheil Hassas Yeganeh /* 201576fd2f7SSoheil Hassas Yeganeh * The sender enters Congestion Window Reduction (CWR) state when it 202576fd2f7SSoheil Hassas Yeganeh * has received ACKs with ECN-ECE marks, or has experienced congestion 203576fd2f7SSoheil Hassas Yeganeh * or packet discard on the sender host (e.g. qdisc). 204576fd2f7SSoheil Hassas Yeganeh */ 205607ca46eSDavid Howells TCP_CA_CWR = 2, 206607ca46eSDavid Howells #define TCPF_CA_CWR (1<<TCP_CA_CWR) 207576fd2f7SSoheil Hassas Yeganeh /* 208576fd2f7SSoheil Hassas Yeganeh * The sender is in fast recovery and retransmitting lost packets, 209576fd2f7SSoheil Hassas Yeganeh * typically triggered by ACK events. 210576fd2f7SSoheil Hassas Yeganeh */ 211607ca46eSDavid Howells TCP_CA_Recovery = 3, 212607ca46eSDavid Howells #define TCPF_CA_Recovery (1<<TCP_CA_Recovery) 213576fd2f7SSoheil Hassas Yeganeh /* 214576fd2f7SSoheil Hassas Yeganeh * The sender is in loss recovery triggered by retransmission timeout. 215576fd2f7SSoheil Hassas Yeganeh */ 216607ca46eSDavid Howells TCP_CA_Loss = 4 217607ca46eSDavid Howells #define TCPF_CA_Loss (1<<TCP_CA_Loss) 218607ca46eSDavid Howells }; 219607ca46eSDavid Howells 220607ca46eSDavid Howells struct tcp_info { 221607ca46eSDavid Howells __u8 tcpi_state; 222607ca46eSDavid Howells __u8 tcpi_ca_state; 223607ca46eSDavid Howells __u8 tcpi_retransmits; 224607ca46eSDavid Howells __u8 tcpi_probes; 225607ca46eSDavid Howells __u8 tcpi_backoff; 226607ca46eSDavid Howells __u8 tcpi_options; 227607ca46eSDavid Howells __u8 tcpi_snd_wscale : 4, tcpi_rcv_wscale : 4; 22848027478SJason Baron __u8 tcpi_delivery_rate_app_limited:1, tcpi_fastopen_client_fail:2; 229607ca46eSDavid Howells 230607ca46eSDavid Howells __u32 tcpi_rto; 231607ca46eSDavid Howells __u32 tcpi_ato; 232607ca46eSDavid Howells __u32 tcpi_snd_mss; 233607ca46eSDavid Howells __u32 tcpi_rcv_mss; 234607ca46eSDavid Howells 235607ca46eSDavid Howells __u32 tcpi_unacked; 236607ca46eSDavid Howells __u32 tcpi_sacked; 237607ca46eSDavid Howells __u32 tcpi_lost; 238607ca46eSDavid Howells __u32 tcpi_retrans; 239607ca46eSDavid Howells __u32 tcpi_fackets; 240607ca46eSDavid Howells 241607ca46eSDavid Howells /* Times. */ 242607ca46eSDavid Howells __u32 tcpi_last_data_sent; 243607ca46eSDavid Howells __u32 tcpi_last_ack_sent; /* Not remembered, sorry. */ 244607ca46eSDavid Howells __u32 tcpi_last_data_recv; 245607ca46eSDavid Howells __u32 tcpi_last_ack_recv; 246607ca46eSDavid Howells 247607ca46eSDavid Howells /* Metrics. */ 248607ca46eSDavid Howells __u32 tcpi_pmtu; 249607ca46eSDavid Howells __u32 tcpi_rcv_ssthresh; 250607ca46eSDavid Howells __u32 tcpi_rtt; 251607ca46eSDavid Howells __u32 tcpi_rttvar; 252607ca46eSDavid Howells __u32 tcpi_snd_ssthresh; 253607ca46eSDavid Howells __u32 tcpi_snd_cwnd; 254607ca46eSDavid Howells __u32 tcpi_advmss; 255607ca46eSDavid Howells __u32 tcpi_reordering; 256607ca46eSDavid Howells 257607ca46eSDavid Howells __u32 tcpi_rcv_rtt; 258607ca46eSDavid Howells __u32 tcpi_rcv_space; 259607ca46eSDavid Howells 260607ca46eSDavid Howells __u32 tcpi_total_retrans; 261977cb0ecSEric Dumazet 262977cb0ecSEric Dumazet __u64 tcpi_pacing_rate; 263977cb0ecSEric Dumazet __u64 tcpi_max_pacing_rate; 2640df48c26SEric Dumazet __u64 tcpi_bytes_acked; /* RFC4898 tcpEStatsAppHCThruOctetsAcked */ 265bdd1f9edSEric Dumazet __u64 tcpi_bytes_received; /* RFC4898 tcpEStatsAppHCThruOctetsReceived */ 2662efd055cSMarcelo Ricardo Leitner __u32 tcpi_segs_out; /* RFC4898 tcpEStatsPerfSegsOut */ 2672efd055cSMarcelo Ricardo Leitner __u32 tcpi_segs_in; /* RFC4898 tcpEStatsPerfSegsIn */ 268cd9b2660SEric Dumazet 269cd9b2660SEric Dumazet __u32 tcpi_notsent_bytes; 270cd9b2660SEric Dumazet __u32 tcpi_min_rtt; 271a44d6eacSMartin KaFai Lau __u32 tcpi_data_segs_in; /* RFC4898 tcpEStatsDataSegsIn */ 272a44d6eacSMartin KaFai Lau __u32 tcpi_data_segs_out; /* RFC4898 tcpEStatsDataSegsOut */ 273eb8329e0SYuchung Cheng 274eb8329e0SYuchung Cheng __u64 tcpi_delivery_rate; 275efd90174SFrancis Yan 276efd90174SFrancis Yan __u64 tcpi_busy_time; /* Time (usec) busy sending data */ 277efd90174SFrancis Yan __u64 tcpi_rwnd_limited; /* Time (usec) limited by receive window */ 278efd90174SFrancis Yan __u64 tcpi_sndbuf_limited; /* Time (usec) limited by send buffer */ 279feb5f2ecSYuchung Cheng 280feb5f2ecSYuchung Cheng __u32 tcpi_delivered; 281feb5f2ecSYuchung Cheng __u32 tcpi_delivered_ce; 282ba113c3aSWei Wang 283ba113c3aSWei Wang __u64 tcpi_bytes_sent; /* RFC4898 tcpEStatsPerfHCDataOctetsOut */ 284fb31c9b9SWei Wang __u64 tcpi_bytes_retrans; /* RFC4898 tcpEStatsPerfOctetsRetrans */ 2857e10b655SWei Wang __u32 tcpi_dsack_dups; /* RFC4898 tcpEStatsStackDSACKDups */ 2867ec65372SWei Wang __u32 tcpi_reord_seen; /* reordering events seen */ 287f9af2dbbSThomas Higdon 288f9af2dbbSThomas Higdon __u32 tcpi_rcv_ooopack; /* Out-of-order packets received */ 2898f7baad7SThomas Higdon 2908f7baad7SThomas Higdon __u32 tcpi_snd_wnd; /* peer's advertised receive window after 2918f7baad7SThomas Higdon * scaling (bytes) 2928f7baad7SThomas Higdon */ 29371fc7047SMubashir Adnan Qureshi __u32 tcpi_rcv_wnd; /* local advertised receive window after 29471fc7047SMubashir Adnan Qureshi * scaling (bytes) 29571fc7047SMubashir Adnan Qureshi */ 29671fc7047SMubashir Adnan Qureshi 29771fc7047SMubashir Adnan Qureshi __u32 tcpi_rehash; /* PLB or timeout triggered rehash attempts */ 2983868ab0fSAananth V 2993868ab0fSAananth V __u16 tcpi_total_rto; /* Total number of RTO timeouts, including 3003868ab0fSAananth V * SYN/SYN-ACK and recurring timeouts. 3013868ab0fSAananth V */ 3023868ab0fSAananth V __u16 tcpi_total_rto_recoveries; /* Total number of RTO 3033868ab0fSAananth V * recoveries, including any 3043868ab0fSAananth V * unfinished recovery. 3053868ab0fSAananth V */ 3063868ab0fSAananth V __u32 tcpi_total_rto_time; /* Total time spent in RTO recoveries 3073868ab0fSAananth V * in milliseconds, including any 3083868ab0fSAananth V * unfinished recovery. 3093868ab0fSAananth V */ 310607ca46eSDavid Howells }; 311607ca46eSDavid Howells 3121c885808SFrancis Yan /* netlink attributes types for SCM_TIMESTAMPING_OPT_STATS */ 3131c885808SFrancis Yan enum { 3141c885808SFrancis Yan TCP_NLA_PAD, 3151c885808SFrancis Yan TCP_NLA_BUSY, /* Time (usec) busy sending data */ 3161c885808SFrancis Yan TCP_NLA_RWND_LIMITED, /* Time (usec) limited by receive window */ 3171c885808SFrancis Yan TCP_NLA_SNDBUF_LIMITED, /* Time (usec) limited by send buffer */ 3187e98102fSYuchung Cheng TCP_NLA_DATA_SEGS_OUT, /* Data pkts sent including retransmission */ 3197e98102fSYuchung Cheng TCP_NLA_TOTAL_RETRANS, /* Data pkts retransmitted */ 320bb7c19f9SWei Wang TCP_NLA_PACING_RATE, /* Pacing rate in bytes per second */ 321bb7c19f9SWei Wang TCP_NLA_DELIVERY_RATE, /* Delivery rate in bytes per second */ 322bb7c19f9SWei Wang TCP_NLA_SND_CWND, /* Sending congestion window */ 323bb7c19f9SWei Wang TCP_NLA_REORDERING, /* Reordering metric */ 324bb7c19f9SWei Wang TCP_NLA_MIN_RTT, /* minimum RTT */ 325bb7c19f9SWei Wang TCP_NLA_RECUR_RETRANS, /* Recurring retransmits for the current pkt */ 326bb7c19f9SWei Wang TCP_NLA_DELIVERY_RATE_APP_LMT, /* delivery rate application limited ? */ 32787ecc95dSPriyaranjan Jha TCP_NLA_SNDQ_SIZE, /* Data (bytes) pending in send queue */ 328be631892SPriyaranjan Jha TCP_NLA_CA_STATE, /* ca_state of socket */ 3297156d194SYousuk Seung TCP_NLA_SND_SSTHRESH, /* Slow start size threshold */ 330feb5f2ecSYuchung Cheng TCP_NLA_DELIVERED, /* Data pkts delivered incl. out-of-order */ 331feb5f2ecSYuchung Cheng TCP_NLA_DELIVERED_CE, /* Like above but only ones w/ CE marks */ 332ba113c3aSWei Wang TCP_NLA_BYTES_SENT, /* Data bytes sent including retransmission */ 333fb31c9b9SWei Wang TCP_NLA_BYTES_RETRANS, /* Data bytes retransmitted */ 3347e10b655SWei Wang TCP_NLA_DSACK_DUPS, /* DSACK blocks received */ 3357ec65372SWei Wang TCP_NLA_REORD_SEEN, /* reordering events seen */ 336e8bd8fcaSYousuk Seung TCP_NLA_SRTT, /* smoothed RTT in usecs */ 33732efcc06SAbdul Kabbani TCP_NLA_TIMEOUT_REHASH, /* Timeout-triggered rehash attempts */ 338e08ab0b3SYousuk Seung TCP_NLA_BYTES_NOTSENT, /* Bytes in write queue not yet sent */ 33948040793SYousuk Seung TCP_NLA_EDT, /* Earliest departure time (CLOCK_MONOTONIC) */ 340e7ed11eeSYousuk Seung TCP_NLA_TTL, /* TTL or hop limit of a packet received */ 34129c1c446SMubashir Adnan Qureshi TCP_NLA_REHASH, /* PLB and timeout triggered rehash attempts */ 3421c885808SFrancis Yan }; 3431c885808SFrancis Yan 344607ca46eSDavid Howells /* for TCP_MD5SIG socket option */ 345607ca46eSDavid Howells #define TCP_MD5SIG_MAXKEYLEN 80 346607ca46eSDavid Howells 3478917a777SIvan Delalande /* tcp_md5sig extension flags for TCP_MD5SIG_EXT */ 3486b102db5SDavid Ahern #define TCP_MD5SIG_FLAG_PREFIX 0x1 /* address prefix length */ 3496b102db5SDavid Ahern #define TCP_MD5SIG_FLAG_IFINDEX 0x2 /* ifindex set */ 3508917a777SIvan Delalande 351607ca46eSDavid Howells struct tcp_md5sig { 352607ca46eSDavid Howells struct __kernel_sockaddr_storage tcpm_addr; /* address associated */ 3538917a777SIvan Delalande __u8 tcpm_flags; /* extension flags */ 3548917a777SIvan Delalande __u8 tcpm_prefixlen; /* address prefix */ 355607ca46eSDavid Howells __u16 tcpm_keylen; /* key length */ 3566b102db5SDavid Ahern int tcpm_ifindex; /* device index for scope */ 357607ca46eSDavid Howells __u8 tcpm_key[TCP_MD5SIG_MAXKEYLEN]; /* key (binary) */ 358607ca46eSDavid Howells }; 359607ca46eSDavid Howells 360c03fa9bcSIvan Delalande /* INET_DIAG_MD5SIG */ 361c03fa9bcSIvan Delalande struct tcp_diag_md5sig { 362c03fa9bcSIvan Delalande __u8 tcpm_family; 363c03fa9bcSIvan Delalande __u8 tcpm_prefixlen; 364c03fa9bcSIvan Delalande __u16 tcpm_keylen; 365c03fa9bcSIvan Delalande __be32 tcpm_addr[4]; 366c03fa9bcSIvan Delalande __u8 tcpm_key[TCP_MD5SIG_MAXKEYLEN]; 367c03fa9bcSIvan Delalande }; 368c03fa9bcSIvan Delalande 369c845f5f3SDmitry Safonov #define TCP_AO_MAXKEYLEN 80 370c845f5f3SDmitry Safonov 3714954f17dSDmitry Safonov #define TCP_AO_KEYF_IFINDEX (1 << 0) /* L3 ifindex for VRF */ 3727753c2f0SDmitry Safonov #define TCP_AO_KEYF_EXCLUDE_OPT (1 << 1) /* "Indicates whether TCP 3737753c2f0SDmitry Safonov * options other than TCP-AO 3747753c2f0SDmitry Safonov * are included in the MAC 3757753c2f0SDmitry Safonov * calculation" 3767753c2f0SDmitry Safonov */ 3774954f17dSDmitry Safonov 3784954f17dSDmitry Safonov struct tcp_ao_add { /* setsockopt(TCP_AO_ADD_KEY) */ 3794954f17dSDmitry Safonov struct __kernel_sockaddr_storage addr; /* peer's address for the key */ 3804954f17dSDmitry Safonov char alg_name[64]; /* crypto hash algorithm to use */ 3814954f17dSDmitry Safonov __s32 ifindex; /* L3 dev index for VRF */ 3824954f17dSDmitry Safonov __u32 set_current :1, /* set key as Current_key at once */ 3834954f17dSDmitry Safonov set_rnext :1, /* request it from peer with RNext_key */ 3844954f17dSDmitry Safonov reserved :30; /* must be 0 */ 3854954f17dSDmitry Safonov __u16 reserved2; /* padding, must be 0 */ 3864954f17dSDmitry Safonov __u8 prefix; /* peer's address prefix */ 3874954f17dSDmitry Safonov __u8 sndid; /* SendID for outgoing segments */ 3884954f17dSDmitry Safonov __u8 rcvid; /* RecvID to match for incoming seg */ 3894954f17dSDmitry Safonov __u8 maclen; /* length of authentication code (hash) */ 3904954f17dSDmitry Safonov __u8 keyflags; /* see TCP_AO_KEYF_ */ 3914954f17dSDmitry Safonov __u8 keylen; /* length of ::key */ 3924954f17dSDmitry Safonov __u8 key[TCP_AO_MAXKEYLEN]; 3934954f17dSDmitry Safonov } __attribute__((aligned(8))); 3944954f17dSDmitry Safonov 3954954f17dSDmitry Safonov struct tcp_ao_del { /* setsockopt(TCP_AO_DEL_KEY) */ 3964954f17dSDmitry Safonov struct __kernel_sockaddr_storage addr; /* peer's address for the key */ 3974954f17dSDmitry Safonov __s32 ifindex; /* L3 dev index for VRF */ 3984954f17dSDmitry Safonov __u32 set_current :1, /* corresponding ::current_key */ 3994954f17dSDmitry Safonov set_rnext :1, /* corresponding ::rnext */ 400d6732b95SDmitry Safonov del_async :1, /* only valid for listen sockets */ 401d6732b95SDmitry Safonov reserved :29; /* must be 0 */ 4024954f17dSDmitry Safonov __u16 reserved2; /* padding, must be 0 */ 4034954f17dSDmitry Safonov __u8 prefix; /* peer's address prefix */ 4044954f17dSDmitry Safonov __u8 sndid; /* SendID for outgoing segments */ 4054954f17dSDmitry Safonov __u8 rcvid; /* RecvID to match for incoming seg */ 4064954f17dSDmitry Safonov __u8 current_key; /* KeyID to set as Current_key */ 4074954f17dSDmitry Safonov __u8 rnext; /* KeyID to set as Rnext_key */ 4084954f17dSDmitry Safonov __u8 keyflags; /* see TCP_AO_KEYF_ */ 4094954f17dSDmitry Safonov } __attribute__((aligned(8))); 4104954f17dSDmitry Safonov 411ef84703aSDmitry Safonov struct tcp_ao_info_opt { /* setsockopt(TCP_AO_INFO), getsockopt(TCP_AO_INFO) */ 412ef84703aSDmitry Safonov /* Here 'in' is for setsockopt(), 'out' is for getsockopt() */ 413ef84703aSDmitry Safonov __u32 set_current :1, /* in/out: corresponding ::current_key */ 414ef84703aSDmitry Safonov set_rnext :1, /* in/out: corresponding ::rnext */ 415ef84703aSDmitry Safonov ao_required :1, /* in/out: don't accept non-AO connects */ 416ef84703aSDmitry Safonov set_counters :1, /* in: set/clear ::pkt_* counters */ 417ef84703aSDmitry Safonov accept_icmps :1, /* in/out: accept incoming ICMPs */ 418953af8e3SDmitry Safonov reserved :27; /* must be 0 */ 419af09a341SDmitry Safonov __u16 reserved2; /* padding, must be 0 */ 420ef84703aSDmitry Safonov __u8 current_key; /* in/out: KeyID of Current_key */ 421ef84703aSDmitry Safonov __u8 rnext; /* in/out: keyid of RNext_key */ 422ef84703aSDmitry Safonov __u64 pkt_good; /* in/out: verified segments */ 423ef84703aSDmitry Safonov __u64 pkt_bad; /* in/out: failed verification */ 424ef84703aSDmitry Safonov __u64 pkt_key_not_found; /* in/out: could not find a key to verify */ 425ef84703aSDmitry Safonov __u64 pkt_ao_required; /* in/out: segments missing TCP-AO sign */ 426ef84703aSDmitry Safonov __u64 pkt_dropped_icmp; /* in/out: ICMPs that were ignored */ 427ef84703aSDmitry Safonov } __attribute__((aligned(8))); 428ef84703aSDmitry Safonov 429ef84703aSDmitry Safonov struct tcp_ao_getsockopt { /* getsockopt(TCP_AO_GET_KEYS) */ 430ef84703aSDmitry Safonov struct __kernel_sockaddr_storage addr; /* in/out: dump keys for peer 431ef84703aSDmitry Safonov * with this address/prefix 432ef84703aSDmitry Safonov */ 433ef84703aSDmitry Safonov char alg_name[64]; /* out: crypto hash algorithm */ 434ef84703aSDmitry Safonov __u8 key[TCP_AO_MAXKEYLEN]; 435ef84703aSDmitry Safonov __u32 nkeys; /* in: size of the userspace buffer 436ef84703aSDmitry Safonov * @optval, measured in @optlen - the 437ef84703aSDmitry Safonov * sizeof(struct tcp_ao_getsockopt) 438ef84703aSDmitry Safonov * out: number of keys that matched 439ef84703aSDmitry Safonov */ 440ef84703aSDmitry Safonov __u16 is_current :1, /* in: match and dump Current_key, 441ef84703aSDmitry Safonov * out: the dumped key is Current_key 442ef84703aSDmitry Safonov */ 443ef84703aSDmitry Safonov 444ef84703aSDmitry Safonov is_rnext :1, /* in: match and dump RNext_key, 445ef84703aSDmitry Safonov * out: the dumped key is RNext_key 446ef84703aSDmitry Safonov */ 447ef84703aSDmitry Safonov get_all :1, /* in: dump all keys */ 448ef84703aSDmitry Safonov reserved :13; /* padding, must be 0 */ 449ef84703aSDmitry Safonov __u8 sndid; /* in/out: dump keys with SendID */ 450ef84703aSDmitry Safonov __u8 rcvid; /* in/out: dump keys with RecvID */ 451ef84703aSDmitry Safonov __u8 prefix; /* in/out: dump keys with address/prefix */ 452ef84703aSDmitry Safonov __u8 maclen; /* out: key's length of authentication 453ef84703aSDmitry Safonov * code (hash) 454ef84703aSDmitry Safonov */ 455ef84703aSDmitry Safonov __u8 keyflags; /* in/out: see TCP_AO_KEYF_ */ 456ef84703aSDmitry Safonov __u8 keylen; /* out: length of ::key */ 457ef84703aSDmitry Safonov __s32 ifindex; /* in/out: L3 dev index for VRF */ 458ef84703aSDmitry Safonov __u64 pkt_good; /* out: verified segments */ 459ef84703aSDmitry Safonov __u64 pkt_bad; /* out: segments that failed verification */ 4604954f17dSDmitry Safonov } __attribute__((aligned(8))); 4614954f17dSDmitry Safonov 462*faadfabaSDmitry Safonov struct tcp_ao_repair { /* {s,g}etsockopt(TCP_AO_REPAIR) */ 463*faadfabaSDmitry Safonov __be32 snt_isn; 464*faadfabaSDmitry Safonov __be32 rcv_isn; 465*faadfabaSDmitry Safonov __u32 snd_sne; 466*faadfabaSDmitry Safonov __u32 rcv_sne; 467*faadfabaSDmitry Safonov } __attribute__((aligned(8))); 468*faadfabaSDmitry Safonov 46905255b82SEric Dumazet /* setsockopt(fd, IPPROTO_TCP, TCP_ZEROCOPY_RECEIVE, ...) */ 47005255b82SEric Dumazet 47194ab9eb9SArjun Roy #define TCP_RECEIVE_ZEROCOPY_FLAG_TLB_CLEAN_HINT 0x1 47205255b82SEric Dumazet struct tcp_zerocopy_receive { 47305255b82SEric Dumazet __u64 address; /* in: address of mapping */ 47405255b82SEric Dumazet __u32 length; /* in/out: number of bytes to map/mapped */ 47505255b82SEric Dumazet __u32 recv_skip_hint; /* out: amount of bytes to skip */ 476c8856c05SArjun Roy __u32 inq; /* out: amount of bytes in read queue */ 47733946518SArjun Roy __s32 err; /* out: socket error */ 47818fb76edSArjun Roy __u64 copybuf_address; /* in: copybuf address (small reads) */ 47918fb76edSArjun Roy __s32 copybuf_len; /* in/out: copybuf bytes avail/used or error */ 48094ab9eb9SArjun Roy __u32 flags; /* in: flags */ 4817eeba170SArjun Roy __u64 msg_control; /* ancillary data */ 4827eeba170SArjun Roy __u64 msg_controllen; 4837eeba170SArjun Roy __u32 msg_flags; 4843c5a2fd0SArjun Roy __u32 reserved; /* set to 0 for now */ 48505255b82SEric Dumazet }; 486607ca46eSDavid Howells #endif /* _UAPI_LINUX_TCP_H */ 487