1*f80ad8b4SAndroid Build Coastguard Worker /* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */ 2*f80ad8b4SAndroid Build Coastguard Worker /* 3*f80ad8b4SAndroid Build Coastguard Worker * INET An implementation of the TCP/IP protocol suite for the LINUX 4*f80ad8b4SAndroid Build Coastguard Worker * operating system. INET is implemented using the BSD Socket 5*f80ad8b4SAndroid Build Coastguard Worker * interface as the means of communication with the user level. 6*f80ad8b4SAndroid Build Coastguard Worker * 7*f80ad8b4SAndroid Build Coastguard Worker * Definitions for the TCP protocol. 8*f80ad8b4SAndroid Build Coastguard Worker * 9*f80ad8b4SAndroid Build Coastguard Worker * Version: @(#)tcp.h 1.0.2 04/28/93 10*f80ad8b4SAndroid Build Coastguard Worker * 11*f80ad8b4SAndroid Build Coastguard Worker * Author: Fred N. van Kempen, <[email protected]> 12*f80ad8b4SAndroid Build Coastguard Worker * 13*f80ad8b4SAndroid Build Coastguard Worker * This program is free software; you can redistribute it and/or 14*f80ad8b4SAndroid Build Coastguard Worker * modify it under the terms of the GNU General Public License 15*f80ad8b4SAndroid Build Coastguard Worker * as published by the Free Software Foundation; either version 16*f80ad8b4SAndroid Build Coastguard Worker * 2 of the License, or (at your option) any later version. 17*f80ad8b4SAndroid Build Coastguard Worker */ 18*f80ad8b4SAndroid Build Coastguard Worker #ifndef _UAPI_LINUX_TCP_H 19*f80ad8b4SAndroid Build Coastguard Worker #define _UAPI_LINUX_TCP_H 20*f80ad8b4SAndroid Build Coastguard Worker 21*f80ad8b4SAndroid Build Coastguard Worker #include <linux/types.h> 22*f80ad8b4SAndroid Build Coastguard Worker #include <asm/byteorder.h> 23*f80ad8b4SAndroid Build Coastguard Worker #include <linux/socket.h> 24*f80ad8b4SAndroid Build Coastguard Worker 25*f80ad8b4SAndroid Build Coastguard Worker struct tcphdr { 26*f80ad8b4SAndroid Build Coastguard Worker __be16 source; 27*f80ad8b4SAndroid Build Coastguard Worker __be16 dest; 28*f80ad8b4SAndroid Build Coastguard Worker __be32 seq; 29*f80ad8b4SAndroid Build Coastguard Worker __be32 ack_seq; 30*f80ad8b4SAndroid Build Coastguard Worker #if defined(__LITTLE_ENDIAN_BITFIELD) 31*f80ad8b4SAndroid Build Coastguard Worker __u16 res1:4, 32*f80ad8b4SAndroid Build Coastguard Worker doff:4, 33*f80ad8b4SAndroid Build Coastguard Worker fin:1, 34*f80ad8b4SAndroid Build Coastguard Worker syn:1, 35*f80ad8b4SAndroid Build Coastguard Worker rst:1, 36*f80ad8b4SAndroid Build Coastguard Worker psh:1, 37*f80ad8b4SAndroid Build Coastguard Worker ack:1, 38*f80ad8b4SAndroid Build Coastguard Worker urg:1, 39*f80ad8b4SAndroid Build Coastguard Worker ece:1, 40*f80ad8b4SAndroid Build Coastguard Worker cwr:1; 41*f80ad8b4SAndroid Build Coastguard Worker #elif defined(__BIG_ENDIAN_BITFIELD) 42*f80ad8b4SAndroid Build Coastguard Worker __u16 doff:4, 43*f80ad8b4SAndroid Build Coastguard Worker res1:4, 44*f80ad8b4SAndroid Build Coastguard Worker cwr:1, 45*f80ad8b4SAndroid Build Coastguard Worker ece:1, 46*f80ad8b4SAndroid Build Coastguard Worker urg:1, 47*f80ad8b4SAndroid Build Coastguard Worker ack:1, 48*f80ad8b4SAndroid Build Coastguard Worker psh:1, 49*f80ad8b4SAndroid Build Coastguard Worker rst:1, 50*f80ad8b4SAndroid Build Coastguard Worker syn:1, 51*f80ad8b4SAndroid Build Coastguard Worker fin:1; 52*f80ad8b4SAndroid Build Coastguard Worker #else 53*f80ad8b4SAndroid Build Coastguard Worker #error "Adjust your <asm/byteorder.h> defines" 54*f80ad8b4SAndroid Build Coastguard Worker #endif 55*f80ad8b4SAndroid Build Coastguard Worker __be16 window; 56*f80ad8b4SAndroid Build Coastguard Worker __sum16 check; 57*f80ad8b4SAndroid Build Coastguard Worker __be16 urg_ptr; 58*f80ad8b4SAndroid Build Coastguard Worker }; 59*f80ad8b4SAndroid Build Coastguard Worker 60*f80ad8b4SAndroid Build Coastguard Worker /* 61*f80ad8b4SAndroid Build Coastguard Worker * The union cast uses a gcc extension to avoid aliasing problems 62*f80ad8b4SAndroid Build Coastguard Worker * (union is compatible to any of its members) 63*f80ad8b4SAndroid Build Coastguard Worker * This means this part of the code is -fstrict-aliasing safe now. 64*f80ad8b4SAndroid Build Coastguard Worker */ 65*f80ad8b4SAndroid Build Coastguard Worker union tcp_word_hdr { 66*f80ad8b4SAndroid Build Coastguard Worker struct tcphdr hdr; 67*f80ad8b4SAndroid Build Coastguard Worker __be32 words[5]; 68*f80ad8b4SAndroid Build Coastguard Worker }; 69*f80ad8b4SAndroid Build Coastguard Worker 70*f80ad8b4SAndroid Build Coastguard Worker #define tcp_flag_word(tp) (((union tcp_word_hdr *)(tp))->words[3]) 71*f80ad8b4SAndroid Build Coastguard Worker 72*f80ad8b4SAndroid Build Coastguard Worker enum { 73*f80ad8b4SAndroid Build Coastguard Worker TCP_FLAG_CWR = __constant_cpu_to_be32(0x00800000), 74*f80ad8b4SAndroid Build Coastguard Worker TCP_FLAG_ECE = __constant_cpu_to_be32(0x00400000), 75*f80ad8b4SAndroid Build Coastguard Worker TCP_FLAG_URG = __constant_cpu_to_be32(0x00200000), 76*f80ad8b4SAndroid Build Coastguard Worker TCP_FLAG_ACK = __constant_cpu_to_be32(0x00100000), 77*f80ad8b4SAndroid Build Coastguard Worker TCP_FLAG_PSH = __constant_cpu_to_be32(0x00080000), 78*f80ad8b4SAndroid Build Coastguard Worker TCP_FLAG_RST = __constant_cpu_to_be32(0x00040000), 79*f80ad8b4SAndroid Build Coastguard Worker TCP_FLAG_SYN = __constant_cpu_to_be32(0x00020000), 80*f80ad8b4SAndroid Build Coastguard Worker TCP_FLAG_FIN = __constant_cpu_to_be32(0x00010000), 81*f80ad8b4SAndroid Build Coastguard Worker TCP_RESERVED_BITS = __constant_cpu_to_be32(0x0F000000), 82*f80ad8b4SAndroid Build Coastguard Worker TCP_DATA_OFFSET = __constant_cpu_to_be32(0xF0000000) 83*f80ad8b4SAndroid Build Coastguard Worker }; 84*f80ad8b4SAndroid Build Coastguard Worker 85*f80ad8b4SAndroid Build Coastguard Worker /* 86*f80ad8b4SAndroid Build Coastguard Worker * TCP general constants 87*f80ad8b4SAndroid Build Coastguard Worker */ 88*f80ad8b4SAndroid Build Coastguard Worker #define TCP_MSS_DEFAULT 536U /* IPv4 (RFC1122, RFC2581) */ 89*f80ad8b4SAndroid Build Coastguard Worker #define TCP_MSS_DESIRED 1220U /* IPv6 (tunneled), EDNS0 (RFC3226) */ 90*f80ad8b4SAndroid Build Coastguard Worker 91*f80ad8b4SAndroid Build Coastguard Worker /* TCP socket options */ 92*f80ad8b4SAndroid Build Coastguard Worker #define TCP_NODELAY 1 /* Turn off Nagle's algorithm. */ 93*f80ad8b4SAndroid Build Coastguard Worker #define TCP_MAXSEG 2 /* Limit MSS */ 94*f80ad8b4SAndroid Build Coastguard Worker #define TCP_CORK 3 /* Never send partially complete segments */ 95*f80ad8b4SAndroid Build Coastguard Worker #define TCP_KEEPIDLE 4 /* Start keeplives after this period */ 96*f80ad8b4SAndroid Build Coastguard Worker #define TCP_KEEPINTVL 5 /* Interval between keepalives */ 97*f80ad8b4SAndroid Build Coastguard Worker #define TCP_KEEPCNT 6 /* Number of keepalives before death */ 98*f80ad8b4SAndroid Build Coastguard Worker #define TCP_SYNCNT 7 /* Number of SYN retransmits */ 99*f80ad8b4SAndroid Build Coastguard Worker #define TCP_LINGER2 8 /* Life time of orphaned FIN-WAIT-2 state */ 100*f80ad8b4SAndroid Build Coastguard Worker #define TCP_DEFER_ACCEPT 9 /* Wake up listener only when data arrive */ 101*f80ad8b4SAndroid Build Coastguard Worker #define TCP_WINDOW_CLAMP 10 /* Bound advertised window */ 102*f80ad8b4SAndroid Build Coastguard Worker #define TCP_INFO 11 /* Information about this connection. */ 103*f80ad8b4SAndroid Build Coastguard Worker #define TCP_QUICKACK 12 /* Block/reenable quick acks */ 104*f80ad8b4SAndroid Build Coastguard Worker #define TCP_CONGESTION 13 /* Congestion control algorithm */ 105*f80ad8b4SAndroid Build Coastguard Worker #define TCP_MD5SIG 14 /* TCP MD5 Signature (RFC2385) */ 106*f80ad8b4SAndroid Build Coastguard Worker #define TCP_THIN_LINEAR_TIMEOUTS 16 /* Use linear timeouts for thin streams*/ 107*f80ad8b4SAndroid Build Coastguard Worker #define TCP_THIN_DUPACK 17 /* Fast retrans. after 1 dupack */ 108*f80ad8b4SAndroid Build Coastguard Worker #define TCP_USER_TIMEOUT 18 /* How long for loss retry before timeout */ 109*f80ad8b4SAndroid Build Coastguard Worker #define TCP_REPAIR 19 /* TCP sock is under repair right now */ 110*f80ad8b4SAndroid Build Coastguard Worker #define TCP_REPAIR_QUEUE 20 111*f80ad8b4SAndroid Build Coastguard Worker #define TCP_QUEUE_SEQ 21 112*f80ad8b4SAndroid Build Coastguard Worker #define TCP_REPAIR_OPTIONS 22 113*f80ad8b4SAndroid Build Coastguard Worker #define TCP_FASTOPEN 23 /* Enable FastOpen on listeners */ 114*f80ad8b4SAndroid Build Coastguard Worker #define TCP_TIMESTAMP 24 115*f80ad8b4SAndroid Build Coastguard Worker #define TCP_NOTSENT_LOWAT 25 /* limit number of unsent bytes in write queue */ 116*f80ad8b4SAndroid Build Coastguard Worker #define TCP_CC_INFO 26 /* Get Congestion Control (optional) info */ 117*f80ad8b4SAndroid Build Coastguard Worker #define TCP_SAVE_SYN 27 /* Record SYN headers for new connections */ 118*f80ad8b4SAndroid Build Coastguard Worker #define TCP_SAVED_SYN 28 /* Get SYN headers recorded for connection */ 119*f80ad8b4SAndroid Build Coastguard Worker #define TCP_REPAIR_WINDOW 29 /* Get/set window parameters */ 120*f80ad8b4SAndroid Build Coastguard Worker #define TCP_FASTOPEN_CONNECT 30 /* Attempt FastOpen with connect */ 121*f80ad8b4SAndroid Build Coastguard Worker #define TCP_ULP 31 /* Attach a ULP to a TCP connection */ 122*f80ad8b4SAndroid Build Coastguard Worker #define TCP_MD5SIG_EXT 32 /* TCP MD5 Signature with extensions */ 123*f80ad8b4SAndroid Build Coastguard Worker #define TCP_FASTOPEN_KEY 33 /* Set the key for Fast Open (cookie) */ 124*f80ad8b4SAndroid Build Coastguard Worker #define TCP_FASTOPEN_NO_COOKIE 34 /* Enable TFO without a TFO cookie */ 125*f80ad8b4SAndroid Build Coastguard Worker #define TCP_ZEROCOPY_RECEIVE 35 126*f80ad8b4SAndroid Build Coastguard Worker #define TCP_INQ 36 /* Notify bytes available to read as a cmsg on read */ 127*f80ad8b4SAndroid Build Coastguard Worker 128*f80ad8b4SAndroid Build Coastguard Worker #define TCP_CM_INQ TCP_INQ 129*f80ad8b4SAndroid Build Coastguard Worker 130*f80ad8b4SAndroid Build Coastguard Worker #define TCP_TX_DELAY 37 /* delay outgoing packets by XX usec */ 131*f80ad8b4SAndroid Build Coastguard Worker 132*f80ad8b4SAndroid Build Coastguard Worker #define TCP_AO_ADD_KEY 38 /* Add/Set MKT */ 133*f80ad8b4SAndroid Build Coastguard Worker #define TCP_AO_DEL_KEY 39 /* Delete MKT */ 134*f80ad8b4SAndroid Build Coastguard Worker #define TCP_AO_INFO 40 /* Set/list TCP-AO per-socket options */ 135*f80ad8b4SAndroid Build Coastguard Worker #define TCP_AO_GET_KEYS 41 /* List MKT(s) */ 136*f80ad8b4SAndroid Build Coastguard Worker #define TCP_AO_REPAIR 42 /* Get/Set SNEs and ISNs */ 137*f80ad8b4SAndroid Build Coastguard Worker 138*f80ad8b4SAndroid Build Coastguard Worker #define TCP_IS_MPTCP 43 /* Is MPTCP being used? */ 139*f80ad8b4SAndroid Build Coastguard Worker 140*f80ad8b4SAndroid Build Coastguard Worker #define TCP_REPAIR_ON 1 141*f80ad8b4SAndroid Build Coastguard Worker #define TCP_REPAIR_OFF 0 142*f80ad8b4SAndroid Build Coastguard Worker #define TCP_REPAIR_OFF_NO_WP -1 /* Turn off without window probes */ 143*f80ad8b4SAndroid Build Coastguard Worker 144*f80ad8b4SAndroid Build Coastguard Worker struct tcp_repair_opt { 145*f80ad8b4SAndroid Build Coastguard Worker __u32 opt_code; 146*f80ad8b4SAndroid Build Coastguard Worker __u32 opt_val; 147*f80ad8b4SAndroid Build Coastguard Worker }; 148*f80ad8b4SAndroid Build Coastguard Worker 149*f80ad8b4SAndroid Build Coastguard Worker struct tcp_repair_window { 150*f80ad8b4SAndroid Build Coastguard Worker __u32 snd_wl1; 151*f80ad8b4SAndroid Build Coastguard Worker __u32 snd_wnd; 152*f80ad8b4SAndroid Build Coastguard Worker __u32 max_window; 153*f80ad8b4SAndroid Build Coastguard Worker 154*f80ad8b4SAndroid Build Coastguard Worker __u32 rcv_wnd; 155*f80ad8b4SAndroid Build Coastguard Worker __u32 rcv_wup; 156*f80ad8b4SAndroid Build Coastguard Worker }; 157*f80ad8b4SAndroid Build Coastguard Worker 158*f80ad8b4SAndroid Build Coastguard Worker enum { 159*f80ad8b4SAndroid Build Coastguard Worker TCP_NO_QUEUE, 160*f80ad8b4SAndroid Build Coastguard Worker TCP_RECV_QUEUE, 161*f80ad8b4SAndroid Build Coastguard Worker TCP_SEND_QUEUE, 162*f80ad8b4SAndroid Build Coastguard Worker TCP_QUEUES_NR, 163*f80ad8b4SAndroid Build Coastguard Worker }; 164*f80ad8b4SAndroid Build Coastguard Worker 165*f80ad8b4SAndroid Build Coastguard Worker /* why fastopen failed from client perspective */ 166*f80ad8b4SAndroid Build Coastguard Worker enum tcp_fastopen_client_fail { 167*f80ad8b4SAndroid Build Coastguard Worker TFO_STATUS_UNSPEC, /* catch-all */ 168*f80ad8b4SAndroid Build Coastguard Worker TFO_COOKIE_UNAVAILABLE, /* if not in TFO_CLIENT_NO_COOKIE mode */ 169*f80ad8b4SAndroid Build Coastguard Worker TFO_DATA_NOT_ACKED, /* SYN-ACK did not ack SYN data */ 170*f80ad8b4SAndroid Build Coastguard Worker TFO_SYN_RETRANSMITTED, /* SYN-ACK did not ack SYN data after timeout */ 171*f80ad8b4SAndroid Build Coastguard Worker }; 172*f80ad8b4SAndroid Build Coastguard Worker 173*f80ad8b4SAndroid Build Coastguard Worker /* for TCP_INFO socket option */ 174*f80ad8b4SAndroid Build Coastguard Worker #define TCPI_OPT_TIMESTAMPS 1 175*f80ad8b4SAndroid Build Coastguard Worker #define TCPI_OPT_SACK 2 176*f80ad8b4SAndroid Build Coastguard Worker #define TCPI_OPT_WSCALE 4 177*f80ad8b4SAndroid Build Coastguard Worker #define TCPI_OPT_ECN 8 /* ECN was negociated at TCP session init */ 178*f80ad8b4SAndroid Build Coastguard Worker #define TCPI_OPT_ECN_SEEN 16 /* we received at least one packet with ECT */ 179*f80ad8b4SAndroid Build Coastguard Worker #define TCPI_OPT_SYN_DATA 32 /* SYN-ACK acked data in SYN sent or rcvd */ 180*f80ad8b4SAndroid Build Coastguard Worker #define TCPI_OPT_USEC_TS 64 /* usec timestamps */ 181*f80ad8b4SAndroid Build Coastguard Worker 182*f80ad8b4SAndroid Build Coastguard Worker /* 183*f80ad8b4SAndroid Build Coastguard Worker * Sender's congestion state indicating normal or abnormal situations 184*f80ad8b4SAndroid Build Coastguard Worker * in the last round of packets sent. The state is driven by the ACK 185*f80ad8b4SAndroid Build Coastguard Worker * information and timer events. 186*f80ad8b4SAndroid Build Coastguard Worker */ 187*f80ad8b4SAndroid Build Coastguard Worker enum tcp_ca_state { 188*f80ad8b4SAndroid Build Coastguard Worker /* 189*f80ad8b4SAndroid Build Coastguard Worker * Nothing bad has been observed recently. 190*f80ad8b4SAndroid Build Coastguard Worker * No apparent reordering, packet loss, or ECN marks. 191*f80ad8b4SAndroid Build Coastguard Worker */ 192*f80ad8b4SAndroid Build Coastguard Worker TCP_CA_Open = 0, 193*f80ad8b4SAndroid Build Coastguard Worker #define TCPF_CA_Open (1<<TCP_CA_Open) 194*f80ad8b4SAndroid Build Coastguard Worker /* 195*f80ad8b4SAndroid Build Coastguard Worker * The sender enters disordered state when it has received DUPACKs or 196*f80ad8b4SAndroid Build Coastguard Worker * SACKs in the last round of packets sent. This could be due to packet 197*f80ad8b4SAndroid Build Coastguard Worker * loss or reordering but needs further information to confirm packets 198*f80ad8b4SAndroid Build Coastguard Worker * have been lost. 199*f80ad8b4SAndroid Build Coastguard Worker */ 200*f80ad8b4SAndroid Build Coastguard Worker TCP_CA_Disorder = 1, 201*f80ad8b4SAndroid Build Coastguard Worker #define TCPF_CA_Disorder (1<<TCP_CA_Disorder) 202*f80ad8b4SAndroid Build Coastguard Worker /* 203*f80ad8b4SAndroid Build Coastguard Worker * The sender enters Congestion Window Reduction (CWR) state when it 204*f80ad8b4SAndroid Build Coastguard Worker * has received ACKs with ECN-ECE marks, or has experienced congestion 205*f80ad8b4SAndroid Build Coastguard Worker * or packet discard on the sender host (e.g. qdisc). 206*f80ad8b4SAndroid Build Coastguard Worker */ 207*f80ad8b4SAndroid Build Coastguard Worker TCP_CA_CWR = 2, 208*f80ad8b4SAndroid Build Coastguard Worker #define TCPF_CA_CWR (1<<TCP_CA_CWR) 209*f80ad8b4SAndroid Build Coastguard Worker /* 210*f80ad8b4SAndroid Build Coastguard Worker * The sender is in fast recovery and retransmitting lost packets, 211*f80ad8b4SAndroid Build Coastguard Worker * typically triggered by ACK events. 212*f80ad8b4SAndroid Build Coastguard Worker */ 213*f80ad8b4SAndroid Build Coastguard Worker TCP_CA_Recovery = 3, 214*f80ad8b4SAndroid Build Coastguard Worker #define TCPF_CA_Recovery (1<<TCP_CA_Recovery) 215*f80ad8b4SAndroid Build Coastguard Worker /* 216*f80ad8b4SAndroid Build Coastguard Worker * The sender is in loss recovery triggered by retransmission timeout. 217*f80ad8b4SAndroid Build Coastguard Worker */ 218*f80ad8b4SAndroid Build Coastguard Worker TCP_CA_Loss = 4 219*f80ad8b4SAndroid Build Coastguard Worker #define TCPF_CA_Loss (1<<TCP_CA_Loss) 220*f80ad8b4SAndroid Build Coastguard Worker }; 221*f80ad8b4SAndroid Build Coastguard Worker 222*f80ad8b4SAndroid Build Coastguard Worker struct tcp_info { 223*f80ad8b4SAndroid Build Coastguard Worker __u8 tcpi_state; 224*f80ad8b4SAndroid Build Coastguard Worker __u8 tcpi_ca_state; 225*f80ad8b4SAndroid Build Coastguard Worker __u8 tcpi_retransmits; 226*f80ad8b4SAndroid Build Coastguard Worker __u8 tcpi_probes; 227*f80ad8b4SAndroid Build Coastguard Worker __u8 tcpi_backoff; 228*f80ad8b4SAndroid Build Coastguard Worker __u8 tcpi_options; 229*f80ad8b4SAndroid Build Coastguard Worker __u8 tcpi_snd_wscale : 4, tcpi_rcv_wscale : 4; 230*f80ad8b4SAndroid Build Coastguard Worker __u8 tcpi_delivery_rate_app_limited:1, tcpi_fastopen_client_fail:2; 231*f80ad8b4SAndroid Build Coastguard Worker 232*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_rto; 233*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_ato; 234*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_snd_mss; 235*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_rcv_mss; 236*f80ad8b4SAndroid Build Coastguard Worker 237*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_unacked; 238*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_sacked; 239*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_lost; 240*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_retrans; 241*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_fackets; 242*f80ad8b4SAndroid Build Coastguard Worker 243*f80ad8b4SAndroid Build Coastguard Worker /* Times. */ 244*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_last_data_sent; 245*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_last_ack_sent; /* Not remembered, sorry. */ 246*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_last_data_recv; 247*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_last_ack_recv; 248*f80ad8b4SAndroid Build Coastguard Worker 249*f80ad8b4SAndroid Build Coastguard Worker /* Metrics. */ 250*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_pmtu; 251*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_rcv_ssthresh; 252*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_rtt; 253*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_rttvar; 254*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_snd_ssthresh; 255*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_snd_cwnd; 256*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_advmss; 257*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_reordering; 258*f80ad8b4SAndroid Build Coastguard Worker 259*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_rcv_rtt; 260*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_rcv_space; 261*f80ad8b4SAndroid Build Coastguard Worker 262*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_total_retrans; 263*f80ad8b4SAndroid Build Coastguard Worker 264*f80ad8b4SAndroid Build Coastguard Worker __u64 tcpi_pacing_rate; 265*f80ad8b4SAndroid Build Coastguard Worker __u64 tcpi_max_pacing_rate; 266*f80ad8b4SAndroid Build Coastguard Worker __u64 tcpi_bytes_acked; /* RFC4898 tcpEStatsAppHCThruOctetsAcked */ 267*f80ad8b4SAndroid Build Coastguard Worker __u64 tcpi_bytes_received; /* RFC4898 tcpEStatsAppHCThruOctetsReceived */ 268*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_segs_out; /* RFC4898 tcpEStatsPerfSegsOut */ 269*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_segs_in; /* RFC4898 tcpEStatsPerfSegsIn */ 270*f80ad8b4SAndroid Build Coastguard Worker 271*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_notsent_bytes; 272*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_min_rtt; 273*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_data_segs_in; /* RFC4898 tcpEStatsDataSegsIn */ 274*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_data_segs_out; /* RFC4898 tcpEStatsDataSegsOut */ 275*f80ad8b4SAndroid Build Coastguard Worker 276*f80ad8b4SAndroid Build Coastguard Worker __u64 tcpi_delivery_rate; 277*f80ad8b4SAndroid Build Coastguard Worker 278*f80ad8b4SAndroid Build Coastguard Worker __u64 tcpi_busy_time; /* Time (usec) busy sending data */ 279*f80ad8b4SAndroid Build Coastguard Worker __u64 tcpi_rwnd_limited; /* Time (usec) limited by receive window */ 280*f80ad8b4SAndroid Build Coastguard Worker __u64 tcpi_sndbuf_limited; /* Time (usec) limited by send buffer */ 281*f80ad8b4SAndroid Build Coastguard Worker 282*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_delivered; 283*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_delivered_ce; 284*f80ad8b4SAndroid Build Coastguard Worker 285*f80ad8b4SAndroid Build Coastguard Worker __u64 tcpi_bytes_sent; /* RFC4898 tcpEStatsPerfHCDataOctetsOut */ 286*f80ad8b4SAndroid Build Coastguard Worker __u64 tcpi_bytes_retrans; /* RFC4898 tcpEStatsPerfOctetsRetrans */ 287*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_dsack_dups; /* RFC4898 tcpEStatsStackDSACKDups */ 288*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_reord_seen; /* reordering events seen */ 289*f80ad8b4SAndroid Build Coastguard Worker 290*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_rcv_ooopack; /* Out-of-order packets received */ 291*f80ad8b4SAndroid Build Coastguard Worker 292*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_snd_wnd; /* peer's advertised receive window after 293*f80ad8b4SAndroid Build Coastguard Worker * scaling (bytes) 294*f80ad8b4SAndroid Build Coastguard Worker */ 295*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_rcv_wnd; /* local advertised receive window after 296*f80ad8b4SAndroid Build Coastguard Worker * scaling (bytes) 297*f80ad8b4SAndroid Build Coastguard Worker */ 298*f80ad8b4SAndroid Build Coastguard Worker 299*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_rehash; /* PLB or timeout triggered rehash attempts */ 300*f80ad8b4SAndroid Build Coastguard Worker 301*f80ad8b4SAndroid Build Coastguard Worker __u16 tcpi_total_rto; /* Total number of RTO timeouts, including 302*f80ad8b4SAndroid Build Coastguard Worker * SYN/SYN-ACK and recurring timeouts. 303*f80ad8b4SAndroid Build Coastguard Worker */ 304*f80ad8b4SAndroid Build Coastguard Worker __u16 tcpi_total_rto_recoveries; /* Total number of RTO 305*f80ad8b4SAndroid Build Coastguard Worker * recoveries, including any 306*f80ad8b4SAndroid Build Coastguard Worker * unfinished recovery. 307*f80ad8b4SAndroid Build Coastguard Worker */ 308*f80ad8b4SAndroid Build Coastguard Worker __u32 tcpi_total_rto_time; /* Total time spent in RTO recoveries 309*f80ad8b4SAndroid Build Coastguard Worker * in milliseconds, including any 310*f80ad8b4SAndroid Build Coastguard Worker * unfinished recovery. 311*f80ad8b4SAndroid Build Coastguard Worker */ 312*f80ad8b4SAndroid Build Coastguard Worker }; 313*f80ad8b4SAndroid Build Coastguard Worker 314*f80ad8b4SAndroid Build Coastguard Worker /* netlink attributes types for SCM_TIMESTAMPING_OPT_STATS */ 315*f80ad8b4SAndroid Build Coastguard Worker enum { 316*f80ad8b4SAndroid Build Coastguard Worker TCP_NLA_PAD, 317*f80ad8b4SAndroid Build Coastguard Worker TCP_NLA_BUSY, /* Time (usec) busy sending data */ 318*f80ad8b4SAndroid Build Coastguard Worker TCP_NLA_RWND_LIMITED, /* Time (usec) limited by receive window */ 319*f80ad8b4SAndroid Build Coastguard Worker TCP_NLA_SNDBUF_LIMITED, /* Time (usec) limited by send buffer */ 320*f80ad8b4SAndroid Build Coastguard Worker TCP_NLA_DATA_SEGS_OUT, /* Data pkts sent including retransmission */ 321*f80ad8b4SAndroid Build Coastguard Worker TCP_NLA_TOTAL_RETRANS, /* Data pkts retransmitted */ 322*f80ad8b4SAndroid Build Coastguard Worker TCP_NLA_PACING_RATE, /* Pacing rate in bytes per second */ 323*f80ad8b4SAndroid Build Coastguard Worker TCP_NLA_DELIVERY_RATE, /* Delivery rate in bytes per second */ 324*f80ad8b4SAndroid Build Coastguard Worker TCP_NLA_SND_CWND, /* Sending congestion window */ 325*f80ad8b4SAndroid Build Coastguard Worker TCP_NLA_REORDERING, /* Reordering metric */ 326*f80ad8b4SAndroid Build Coastguard Worker TCP_NLA_MIN_RTT, /* minimum RTT */ 327*f80ad8b4SAndroid Build Coastguard Worker TCP_NLA_RECUR_RETRANS, /* Recurring retransmits for the current pkt */ 328*f80ad8b4SAndroid Build Coastguard Worker TCP_NLA_DELIVERY_RATE_APP_LMT, /* delivery rate application limited ? */ 329*f80ad8b4SAndroid Build Coastguard Worker TCP_NLA_SNDQ_SIZE, /* Data (bytes) pending in send queue */ 330*f80ad8b4SAndroid Build Coastguard Worker TCP_NLA_CA_STATE, /* ca_state of socket */ 331*f80ad8b4SAndroid Build Coastguard Worker TCP_NLA_SND_SSTHRESH, /* Slow start size threshold */ 332*f80ad8b4SAndroid Build Coastguard Worker TCP_NLA_DELIVERED, /* Data pkts delivered incl. out-of-order */ 333*f80ad8b4SAndroid Build Coastguard Worker TCP_NLA_DELIVERED_CE, /* Like above but only ones w/ CE marks */ 334*f80ad8b4SAndroid Build Coastguard Worker TCP_NLA_BYTES_SENT, /* Data bytes sent including retransmission */ 335*f80ad8b4SAndroid Build Coastguard Worker TCP_NLA_BYTES_RETRANS, /* Data bytes retransmitted */ 336*f80ad8b4SAndroid Build Coastguard Worker TCP_NLA_DSACK_DUPS, /* DSACK blocks received */ 337*f80ad8b4SAndroid Build Coastguard Worker TCP_NLA_REORD_SEEN, /* reordering events seen */ 338*f80ad8b4SAndroid Build Coastguard Worker TCP_NLA_SRTT, /* smoothed RTT in usecs */ 339*f80ad8b4SAndroid Build Coastguard Worker TCP_NLA_TIMEOUT_REHASH, /* Timeout-triggered rehash attempts */ 340*f80ad8b4SAndroid Build Coastguard Worker TCP_NLA_BYTES_NOTSENT, /* Bytes in write queue not yet sent */ 341*f80ad8b4SAndroid Build Coastguard Worker TCP_NLA_EDT, /* Earliest departure time (CLOCK_MONOTONIC) */ 342*f80ad8b4SAndroid Build Coastguard Worker TCP_NLA_TTL, /* TTL or hop limit of a packet received */ 343*f80ad8b4SAndroid Build Coastguard Worker TCP_NLA_REHASH, /* PLB and timeout triggered rehash attempts */ 344*f80ad8b4SAndroid Build Coastguard Worker }; 345*f80ad8b4SAndroid Build Coastguard Worker 346*f80ad8b4SAndroid Build Coastguard Worker /* for TCP_MD5SIG socket option */ 347*f80ad8b4SAndroid Build Coastguard Worker #define TCP_MD5SIG_MAXKEYLEN 80 348*f80ad8b4SAndroid Build Coastguard Worker 349*f80ad8b4SAndroid Build Coastguard Worker /* tcp_md5sig extension flags for TCP_MD5SIG_EXT */ 350*f80ad8b4SAndroid Build Coastguard Worker #define TCP_MD5SIG_FLAG_PREFIX 0x1 /* address prefix length */ 351*f80ad8b4SAndroid Build Coastguard Worker #define TCP_MD5SIG_FLAG_IFINDEX 0x2 /* ifindex set */ 352*f80ad8b4SAndroid Build Coastguard Worker 353*f80ad8b4SAndroid Build Coastguard Worker struct tcp_md5sig { 354*f80ad8b4SAndroid Build Coastguard Worker struct __kernel_sockaddr_storage tcpm_addr; /* address associated */ 355*f80ad8b4SAndroid Build Coastguard Worker __u8 tcpm_flags; /* extension flags */ 356*f80ad8b4SAndroid Build Coastguard Worker __u8 tcpm_prefixlen; /* address prefix */ 357*f80ad8b4SAndroid Build Coastguard Worker __u16 tcpm_keylen; /* key length */ 358*f80ad8b4SAndroid Build Coastguard Worker int tcpm_ifindex; /* device index for scope */ 359*f80ad8b4SAndroid Build Coastguard Worker __u8 tcpm_key[TCP_MD5SIG_MAXKEYLEN]; /* key (binary) */ 360*f80ad8b4SAndroid Build Coastguard Worker }; 361*f80ad8b4SAndroid Build Coastguard Worker 362*f80ad8b4SAndroid Build Coastguard Worker /* INET_DIAG_MD5SIG */ 363*f80ad8b4SAndroid Build Coastguard Worker struct tcp_diag_md5sig { 364*f80ad8b4SAndroid Build Coastguard Worker __u8 tcpm_family; 365*f80ad8b4SAndroid Build Coastguard Worker __u8 tcpm_prefixlen; 366*f80ad8b4SAndroid Build Coastguard Worker __u16 tcpm_keylen; 367*f80ad8b4SAndroid Build Coastguard Worker __be32 tcpm_addr[4]; 368*f80ad8b4SAndroid Build Coastguard Worker __u8 tcpm_key[TCP_MD5SIG_MAXKEYLEN]; 369*f80ad8b4SAndroid Build Coastguard Worker }; 370*f80ad8b4SAndroid Build Coastguard Worker 371*f80ad8b4SAndroid Build Coastguard Worker #define TCP_AO_MAXKEYLEN 80 372*f80ad8b4SAndroid Build Coastguard Worker 373*f80ad8b4SAndroid Build Coastguard Worker #define TCP_AO_KEYF_IFINDEX (1 << 0) /* L3 ifindex for VRF */ 374*f80ad8b4SAndroid Build Coastguard Worker #define TCP_AO_KEYF_EXCLUDE_OPT (1 << 1) /* "Indicates whether TCP 375*f80ad8b4SAndroid Build Coastguard Worker * options other than TCP-AO 376*f80ad8b4SAndroid Build Coastguard Worker * are included in the MAC 377*f80ad8b4SAndroid Build Coastguard Worker * calculation" 378*f80ad8b4SAndroid Build Coastguard Worker */ 379*f80ad8b4SAndroid Build Coastguard Worker 380*f80ad8b4SAndroid Build Coastguard Worker struct tcp_ao_add { /* setsockopt(TCP_AO_ADD_KEY) */ 381*f80ad8b4SAndroid Build Coastguard Worker struct __kernel_sockaddr_storage addr; /* peer's address for the key */ 382*f80ad8b4SAndroid Build Coastguard Worker char alg_name[64]; /* crypto hash algorithm to use */ 383*f80ad8b4SAndroid Build Coastguard Worker __s32 ifindex; /* L3 dev index for VRF */ 384*f80ad8b4SAndroid Build Coastguard Worker __u32 set_current :1, /* set key as Current_key at once */ 385*f80ad8b4SAndroid Build Coastguard Worker set_rnext :1, /* request it from peer with RNext_key */ 386*f80ad8b4SAndroid Build Coastguard Worker reserved :30; /* must be 0 */ 387*f80ad8b4SAndroid Build Coastguard Worker __u16 reserved2; /* padding, must be 0 */ 388*f80ad8b4SAndroid Build Coastguard Worker __u8 prefix; /* peer's address prefix */ 389*f80ad8b4SAndroid Build Coastguard Worker __u8 sndid; /* SendID for outgoing segments */ 390*f80ad8b4SAndroid Build Coastguard Worker __u8 rcvid; /* RecvID to match for incoming seg */ 391*f80ad8b4SAndroid Build Coastguard Worker __u8 maclen; /* length of authentication code (hash) */ 392*f80ad8b4SAndroid Build Coastguard Worker __u8 keyflags; /* see TCP_AO_KEYF_ */ 393*f80ad8b4SAndroid Build Coastguard Worker __u8 keylen; /* length of ::key */ 394*f80ad8b4SAndroid Build Coastguard Worker __u8 key[TCP_AO_MAXKEYLEN]; 395*f80ad8b4SAndroid Build Coastguard Worker } __attribute__((aligned(8))); 396*f80ad8b4SAndroid Build Coastguard Worker 397*f80ad8b4SAndroid Build Coastguard Worker struct tcp_ao_del { /* setsockopt(TCP_AO_DEL_KEY) */ 398*f80ad8b4SAndroid Build Coastguard Worker struct __kernel_sockaddr_storage addr; /* peer's address for the key */ 399*f80ad8b4SAndroid Build Coastguard Worker __s32 ifindex; /* L3 dev index for VRF */ 400*f80ad8b4SAndroid Build Coastguard Worker __u32 set_current :1, /* corresponding ::current_key */ 401*f80ad8b4SAndroid Build Coastguard Worker set_rnext :1, /* corresponding ::rnext */ 402*f80ad8b4SAndroid Build Coastguard Worker del_async :1, /* only valid for listen sockets */ 403*f80ad8b4SAndroid Build Coastguard Worker reserved :29; /* must be 0 */ 404*f80ad8b4SAndroid Build Coastguard Worker __u16 reserved2; /* padding, must be 0 */ 405*f80ad8b4SAndroid Build Coastguard Worker __u8 prefix; /* peer's address prefix */ 406*f80ad8b4SAndroid Build Coastguard Worker __u8 sndid; /* SendID for outgoing segments */ 407*f80ad8b4SAndroid Build Coastguard Worker __u8 rcvid; /* RecvID to match for incoming seg */ 408*f80ad8b4SAndroid Build Coastguard Worker __u8 current_key; /* KeyID to set as Current_key */ 409*f80ad8b4SAndroid Build Coastguard Worker __u8 rnext; /* KeyID to set as Rnext_key */ 410*f80ad8b4SAndroid Build Coastguard Worker __u8 keyflags; /* see TCP_AO_KEYF_ */ 411*f80ad8b4SAndroid Build Coastguard Worker } __attribute__((aligned(8))); 412*f80ad8b4SAndroid Build Coastguard Worker 413*f80ad8b4SAndroid Build Coastguard Worker struct tcp_ao_info_opt { /* setsockopt(TCP_AO_INFO), getsockopt(TCP_AO_INFO) */ 414*f80ad8b4SAndroid Build Coastguard Worker /* Here 'in' is for setsockopt(), 'out' is for getsockopt() */ 415*f80ad8b4SAndroid Build Coastguard Worker __u32 set_current :1, /* in/out: corresponding ::current_key */ 416*f80ad8b4SAndroid Build Coastguard Worker set_rnext :1, /* in/out: corresponding ::rnext */ 417*f80ad8b4SAndroid Build Coastguard Worker ao_required :1, /* in/out: don't accept non-AO connects */ 418*f80ad8b4SAndroid Build Coastguard Worker set_counters :1, /* in: set/clear ::pkt_* counters */ 419*f80ad8b4SAndroid Build Coastguard Worker accept_icmps :1, /* in/out: accept incoming ICMPs */ 420*f80ad8b4SAndroid Build Coastguard Worker reserved :27; /* must be 0 */ 421*f80ad8b4SAndroid Build Coastguard Worker __u16 reserved2; /* padding, must be 0 */ 422*f80ad8b4SAndroid Build Coastguard Worker __u8 current_key; /* in/out: KeyID of Current_key */ 423*f80ad8b4SAndroid Build Coastguard Worker __u8 rnext; /* in/out: keyid of RNext_key */ 424*f80ad8b4SAndroid Build Coastguard Worker __u64 pkt_good; /* in/out: verified segments */ 425*f80ad8b4SAndroid Build Coastguard Worker __u64 pkt_bad; /* in/out: failed verification */ 426*f80ad8b4SAndroid Build Coastguard Worker __u64 pkt_key_not_found; /* in/out: could not find a key to verify */ 427*f80ad8b4SAndroid Build Coastguard Worker __u64 pkt_ao_required; /* in/out: segments missing TCP-AO sign */ 428*f80ad8b4SAndroid Build Coastguard Worker __u64 pkt_dropped_icmp; /* in/out: ICMPs that were ignored */ 429*f80ad8b4SAndroid Build Coastguard Worker } __attribute__((aligned(8))); 430*f80ad8b4SAndroid Build Coastguard Worker 431*f80ad8b4SAndroid Build Coastguard Worker struct tcp_ao_getsockopt { /* getsockopt(TCP_AO_GET_KEYS) */ 432*f80ad8b4SAndroid Build Coastguard Worker struct __kernel_sockaddr_storage addr; /* in/out: dump keys for peer 433*f80ad8b4SAndroid Build Coastguard Worker * with this address/prefix 434*f80ad8b4SAndroid Build Coastguard Worker */ 435*f80ad8b4SAndroid Build Coastguard Worker char alg_name[64]; /* out: crypto hash algorithm */ 436*f80ad8b4SAndroid Build Coastguard Worker __u8 key[TCP_AO_MAXKEYLEN]; 437*f80ad8b4SAndroid Build Coastguard Worker __u32 nkeys; /* in: size of the userspace buffer 438*f80ad8b4SAndroid Build Coastguard Worker * @optval, measured in @optlen - the 439*f80ad8b4SAndroid Build Coastguard Worker * sizeof(struct tcp_ao_getsockopt) 440*f80ad8b4SAndroid Build Coastguard Worker * out: number of keys that matched 441*f80ad8b4SAndroid Build Coastguard Worker */ 442*f80ad8b4SAndroid Build Coastguard Worker __u16 is_current :1, /* in: match and dump Current_key, 443*f80ad8b4SAndroid Build Coastguard Worker * out: the dumped key is Current_key 444*f80ad8b4SAndroid Build Coastguard Worker */ 445*f80ad8b4SAndroid Build Coastguard Worker 446*f80ad8b4SAndroid Build Coastguard Worker is_rnext :1, /* in: match and dump RNext_key, 447*f80ad8b4SAndroid Build Coastguard Worker * out: the dumped key is RNext_key 448*f80ad8b4SAndroid Build Coastguard Worker */ 449*f80ad8b4SAndroid Build Coastguard Worker get_all :1, /* in: dump all keys */ 450*f80ad8b4SAndroid Build Coastguard Worker reserved :13; /* padding, must be 0 */ 451*f80ad8b4SAndroid Build Coastguard Worker __u8 sndid; /* in/out: dump keys with SendID */ 452*f80ad8b4SAndroid Build Coastguard Worker __u8 rcvid; /* in/out: dump keys with RecvID */ 453*f80ad8b4SAndroid Build Coastguard Worker __u8 prefix; /* in/out: dump keys with address/prefix */ 454*f80ad8b4SAndroid Build Coastguard Worker __u8 maclen; /* out: key's length of authentication 455*f80ad8b4SAndroid Build Coastguard Worker * code (hash) 456*f80ad8b4SAndroid Build Coastguard Worker */ 457*f80ad8b4SAndroid Build Coastguard Worker __u8 keyflags; /* in/out: see TCP_AO_KEYF_ */ 458*f80ad8b4SAndroid Build Coastguard Worker __u8 keylen; /* out: length of ::key */ 459*f80ad8b4SAndroid Build Coastguard Worker __s32 ifindex; /* in/out: L3 dev index for VRF */ 460*f80ad8b4SAndroid Build Coastguard Worker __u64 pkt_good; /* out: verified segments */ 461*f80ad8b4SAndroid Build Coastguard Worker __u64 pkt_bad; /* out: segments that failed verification */ 462*f80ad8b4SAndroid Build Coastguard Worker } __attribute__((aligned(8))); 463*f80ad8b4SAndroid Build Coastguard Worker 464*f80ad8b4SAndroid Build Coastguard Worker struct tcp_ao_repair { /* {s,g}etsockopt(TCP_AO_REPAIR) */ 465*f80ad8b4SAndroid Build Coastguard Worker __be32 snt_isn; 466*f80ad8b4SAndroid Build Coastguard Worker __be32 rcv_isn; 467*f80ad8b4SAndroid Build Coastguard Worker __u32 snd_sne; 468*f80ad8b4SAndroid Build Coastguard Worker __u32 rcv_sne; 469*f80ad8b4SAndroid Build Coastguard Worker } __attribute__((aligned(8))); 470*f80ad8b4SAndroid Build Coastguard Worker 471*f80ad8b4SAndroid Build Coastguard Worker /* setsockopt(fd, IPPROTO_TCP, TCP_ZEROCOPY_RECEIVE, ...) */ 472*f80ad8b4SAndroid Build Coastguard Worker 473*f80ad8b4SAndroid Build Coastguard Worker #define TCP_RECEIVE_ZEROCOPY_FLAG_TLB_CLEAN_HINT 0x1 474*f80ad8b4SAndroid Build Coastguard Worker struct tcp_zerocopy_receive { 475*f80ad8b4SAndroid Build Coastguard Worker __u64 address; /* in: address of mapping */ 476*f80ad8b4SAndroid Build Coastguard Worker __u32 length; /* in/out: number of bytes to map/mapped */ 477*f80ad8b4SAndroid Build Coastguard Worker __u32 recv_skip_hint; /* out: amount of bytes to skip */ 478*f80ad8b4SAndroid Build Coastguard Worker __u32 inq; /* out: amount of bytes in read queue */ 479*f80ad8b4SAndroid Build Coastguard Worker __s32 err; /* out: socket error */ 480*f80ad8b4SAndroid Build Coastguard Worker __u64 copybuf_address; /* in: copybuf address (small reads) */ 481*f80ad8b4SAndroid Build Coastguard Worker __s32 copybuf_len; /* in/out: copybuf bytes avail/used or error */ 482*f80ad8b4SAndroid Build Coastguard Worker __u32 flags; /* in: flags */ 483*f80ad8b4SAndroid Build Coastguard Worker __u64 msg_control; /* ancillary data */ 484*f80ad8b4SAndroid Build Coastguard Worker __u64 msg_controllen; 485*f80ad8b4SAndroid Build Coastguard Worker __u32 msg_flags; 486*f80ad8b4SAndroid Build Coastguard Worker __u32 reserved; /* set to 0 for now */ 487*f80ad8b4SAndroid Build Coastguard Worker }; 488*f80ad8b4SAndroid Build Coastguard Worker #endif /* _UAPI_LINUX_TCP_H */ 489