1 /* 2 * Copyright (c) 2000-2018 Apple Inc. All rights reserved. 3 * 4 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5 * 6 * This file contains Original Code and/or Modifications of Original Code 7 * as defined in and that are subject to the Apple Public Source License 8 * Version 2.0 (the 'License'). You may not use this file except in 9 * compliance with the License. The rights granted to you under the License 10 * may not be used to create, or enable the creation or redistribution of, 11 * unlawful or unlicensed copies of an Apple operating system, or to 12 * circumvent, violate, or enable the circumvention or violation of, any 13 * terms of an Apple operating system software license agreement. 14 * 15 * Please obtain a copy of the License at 16 * http://www.opensource.apple.com/apsl/ and read it before using this file. 17 * 18 * The Original Code and all software distributed under the License are 19 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23 * Please see the License for the specific language governing rights and 24 * limitations under the License. 25 * 26 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27 */ 28 /* 29 * Copyright (c) 1982, 1986, 1993 30 * The Regents of the University of California. All rights reserved. 31 * 32 * Redistribution and use in source and binary forms, with or without 33 * modification, are permitted provided that the following conditions 34 * are met: 35 * 1. Redistributions of source code must retain the above copyright 36 * notice, this list of conditions and the following disclaimer. 37 * 2. Redistributions in binary form must reproduce the above copyright 38 * notice, this list of conditions and the following disclaimer in the 39 * documentation and/or other materials provided with the distribution. 40 * 3. All advertising materials mentioning features or use of this software 41 * must display the following acknowledgement: 42 * This product includes software developed by the University of 43 * California, Berkeley and its contributors. 44 * 4. Neither the name of the University nor the names of its contributors 45 * may be used to endorse or promote products derived from this software 46 * without specific prior written permission. 47 * 48 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 49 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 50 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 51 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 52 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 53 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 54 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 55 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 56 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 57 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 58 * SUCH DAMAGE. 59 * 60 * @(#)tcp.h 8.1 (Berkeley) 6/10/93 61 * $FreeBSD: src/sys/netinet/tcp.h,v 1.13.2.3 2001/03/01 22:08:42 jlemon Exp $ 62 */ 63 64 #ifndef _NETINET_TCP_H_ 65 #define _NETINET_TCP_H_ 66 #ifndef DRIVERKIT 67 #include <sys/appleapiopts.h> 68 #endif /* DRIVERKIT */ 69 70 #include <machine/endian.h> 71 #include <machine/types.h> /* __uint32_t */ 72 73 #ifndef DRIVERKIT 74 #include <sys/types.h> 75 #else 76 #include <sys/_types.h> 77 #endif /* DRIVERKIT */ 78 79 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE) 80 typedef __uint32_t tcp_seq; 81 typedef __uint32_t tcp_cc; /* connection count per rfc1644 */ 82 83 #define tcp6_seq tcp_seq /* for KAME src sync over BSD*'s */ 84 #define tcp6hdr tcphdr /* for KAME src sync over BSD*'s */ 85 86 /* 87 * TCP header. 88 * Per RFC 793, September, 1981. 89 */ 90 struct tcphdr { 91 unsigned short th_sport; /* source port */ 92 unsigned short th_dport; /* destination port */ 93 tcp_seq th_seq; /* sequence number */ 94 tcp_seq th_ack; /* acknowledgement number */ 95 #if __DARWIN_BYTE_ORDER == __DARWIN_LITTLE_ENDIAN 96 unsigned int th_x2:4, /* (unused) */ 97 th_off:4; /* data offset */ 98 #endif 99 #if __DARWIN_BYTE_ORDER == __DARWIN_BIG_ENDIAN 100 unsigned int th_off:4, /* data offset */ 101 th_x2:4; /* (unused) */ 102 #endif 103 unsigned char th_flags; 104 #define TH_FIN 0x01 105 #define TH_SYN 0x02 106 #define TH_RST 0x04 107 #define TH_PUSH 0x08 108 #define TH_ACK 0x10 109 #define TH_URG 0x20 110 #define TH_ECE 0x40 111 #define TH_CWR 0x80 112 #define TH_FLAGS (TH_FIN|TH_SYN|TH_RST|TH_ACK|TH_URG|TH_ECE|TH_CWR) 113 #define TH_ACCEPT (TH_FIN|TH_SYN|TH_RST|TH_ACK) 114 115 unsigned short th_win; /* window */ 116 unsigned short th_sum; /* checksum */ 117 unsigned short th_urp; /* urgent pointer */ 118 }; 119 120 #define TCPOPT_EOL 0 121 #define TCPOPT_NOP 1 122 #define TCPOPT_MAXSEG 2 123 #define TCPOLEN_MAXSEG 4 124 #define TCPOPT_WINDOW 3 125 #define TCPOLEN_WINDOW 3 126 #define TCPOPT_SACK_PERMITTED 4 /* Experimental */ 127 #define TCPOLEN_SACK_PERMITTED 2 128 #define TCPOPT_SACK 5 /* Experimental */ 129 #define TCPOLEN_SACK 8 /* len of sack block */ 130 #define TCPOPT_TIMESTAMP 8 131 #define TCPOLEN_TIMESTAMP 10 132 #define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2) /* appendix A */ 133 #define TCPOPT_TSTAMP_HDR \ 134 (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP) 135 136 #define MAX_TCPOPTLEN 40 /* Absolute maximum TCP options len */ 137 138 #define TCPOPT_CC 11 /* CC options: RFC-1644 */ 139 #define TCPOPT_CCNEW 12 140 #define TCPOPT_CCECHO 13 141 #define TCPOLEN_CC 6 142 #define TCPOLEN_CC_APPA (TCPOLEN_CC+2) 143 #define TCPOPT_CC_HDR(ccopt) \ 144 (TCPOPT_NOP<<24|TCPOPT_NOP<<16|(ccopt)<<8|TCPOLEN_CC) 145 #define TCPOPT_SIGNATURE 19 /* Keyed MD5: RFC 2385 */ 146 #define TCPOLEN_SIGNATURE 18 147 #if MPTCP 148 #define TCPOPT_MULTIPATH 30 149 #endif 150 151 #define TCPOPT_FASTOPEN 34 152 #define TCPOLEN_FASTOPEN_REQ 2 153 154 /* Option definitions */ 155 #define TCPOPT_SACK_PERMIT_HDR \ 156 (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_SACK_PERMITTED<<8|TCPOLEN_SACK_PERMITTED) 157 #define TCPOPT_SACK_HDR (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_SACK<<8) 158 /* Miscellaneous constants */ 159 #define MAX_SACK_BLKS 6 /* Max # SACK blocks stored at sender side */ 160 161 /* 162 * A SACK option that specifies n blocks will have a length of (8*n + 2) 163 * bytes, so the 40 bytes available for TCP options can specify a 164 * maximum of 4 blocks. 165 */ 166 167 #define TCP_MAX_SACK 4 /* MAX # SACKs sent in any segment */ 168 169 170 /* 171 * Default maximum segment size for TCP. 172 * With an IP MTU of 576, this is 536, 173 * but 512 is probably more convenient. 174 * This should be defined as MIN(512, IP_MSS - sizeof (struct tcpiphdr)). 175 */ 176 #define TCP_MSS 512 177 178 /* 179 * TCP_MINMSS is defined to be 216 which is fine for the smallest 180 * link MTU (256 bytes, SLIP interface) in the Internet. 181 * However it is very unlikely to come across such low MTU interfaces 182 * these days (anno dato 2004). 183 * Probably it can be set to 512 without ill effects. But we play safe. 184 * See tcp_subr.c tcp_minmss SYSCTL declaration for more comments. 185 * Setting this to "0" disables the minmss check. 186 */ 187 #define TCP_MINMSS 216 188 189 /* 190 * Default maximum segment size for TCP6. 191 * With an IP6 MSS of 1280, this is 1220, 192 * but 1024 is probably more convenient. (xxx kazu in doubt) 193 * This should be defined as MIN(1024, IP6_MSS - sizeof (struct tcpip6hdr)) 194 */ 195 #define TCP6_MSS 1024 196 197 #define TCP_MAXWIN 65535 /* largest value for (unscaled) window */ 198 #define TTCP_CLIENT_SND_WND 4096 /* dflt send window for T/TCP client */ 199 200 #define TCP_MAX_WINSHIFT 14 /* maximum window shift */ 201 202 #define TCP_MAXHLEN (0xf<<2) /* max length of header in bytes */ 203 #define TCP_MAXOLEN (TCP_MAXHLEN - sizeof(struct tcphdr)) 204 /* max space left for options */ 205 #endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */ 206 207 /* 208 * User-settable options (used with setsockopt). 209 */ 210 #define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */ 211 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE) 212 #define TCP_MAXSEG 0x02 /* set maximum segment size */ 213 #define TCP_NOPUSH 0x04 /* don't push last block of write */ 214 #define TCP_NOOPT 0x08 /* don't use TCP options */ 215 #define TCP_KEEPALIVE 0x10 /* idle time used when SO_KEEPALIVE is enabled */ 216 #define TCP_CONNECTIONTIMEOUT 0x20 /* connection timeout */ 217 #define PERSIST_TIMEOUT 0x40 /* time after which a connection in 218 * persist timeout will terminate. 219 * see draft-ananth-tcpm-persist-02.txt 220 */ 221 #define TCP_RXT_CONNDROPTIME 0x80 /* time after which tcp retransmissions will be 222 * stopped and the connection will be dropped 223 */ 224 #define TCP_RXT_FINDROP 0x100 /* when this option is set, drop a connection 225 * after retransmitting the FIN 3 times. It will 226 * prevent holding too many mbufs in socket 227 * buffer queues. 228 */ 229 #define TCP_KEEPINTVL 0x101 /* interval between keepalives */ 230 #define TCP_KEEPCNT 0x102 /* number of keepalives before close */ 231 #define TCP_SENDMOREACKS 0x103 /* always ack every other packet */ 232 #define TCP_ENABLE_ECN 0x104 /* Enable ECN on a connection */ 233 #define TCP_FASTOPEN 0x105 /* Enable/Disable TCP Fastopen on this socket */ 234 #define TCP_CONNECTION_INFO 0x106 /* State of TCP connection */ 235 236 #ifdef PRIVATE 237 #define TCP_INFO 0x200 /* retrieve tcp_info structure */ 238 #define TCP_MEASURE_SND_BW 0x202 /* Measure sender's bandwidth for this connection */ 239 #endif /* PRIVATE */ 240 241 242 #define TCP_NOTSENT_LOWAT 0x201 /* Low water mark for TCP unsent data */ 243 244 #ifdef PRIVATE 245 #define TCP_MEASURE_BW_BURST 0x203 /* Burst size to use for bandwidth measurement */ 246 #define TCP_PEER_PID 0x204 /* Lookup pid of the process we're connected to */ 247 #define TCP_ADAPTIVE_READ_TIMEOUT 0x205 /* Read timeout used as a multiple of RTT */ 248 #define TCP_OPTION_UNUSED_0 0x206 /* UNUSED */ 249 #define TCP_ADAPTIVE_WRITE_TIMEOUT 0x207 /* Write timeout used as a multiple of RTT */ 250 #define TCP_NOTIMEWAIT 0x208 /* Avoid going into time-wait */ 251 #define TCP_DISABLE_BLACKHOLE_DETECTION 0x209 /* disable PMTU blackhole detection */ 252 #define TCP_ECN_MODE 0x210 /* fine grain control for A/B testing */ 253 #define TCP_KEEPALIVE_OFFLOAD 0x211 /* offload keep alive processing to firmware */ 254 255 /* 256 * TCP_ECN_MODE values 257 */ 258 #define ECN_MODE_DEFAULT 0x0 /* per interface or system wide default */ 259 #define ECN_MODE_ENABLE 0x1 /* force enable ECN on connection */ 260 #define ECN_MODE_DISABLE 0x2 /* force disable ECN on connection */ 261 262 /* 263 * TCP_NOTIFY_ACKNOWLEDGEMENT 264 * 265 * Application can use this socket option to get a notification when 266 * data that is currently written to the socket is acknowledged. The input 267 * argument given to this socket option is a marker_id that will be used for 268 * returning the notification. The application can continue to write 269 * data after setting the marker. There can be multiple of these events 270 * outstanding on a socket at any time up to a max of TCP_MAX_NOTIFY_ACK. 271 * 272 * To get the completed notifications, getsockopt should be called with the 273 * TCP_NOTIFY_ACKNOWLEDGEMENT with the following tcp_notify_ack_complete 274 * structure as an out argument. At most TCP_MAX_NOTIFY_ACK ids will be 275 * returned if they have been successfully acknowledged in each call. 276 */ 277 278 #define TCP_MAX_NOTIFY_ACK 10 279 280 typedef u_int32_t tcp_notify_ack_id_t; 281 282 struct tcp_notify_ack_complete { 283 u_int32_t notify_pending; /* still pending */ 284 u_int32_t notify_complete_count; 285 tcp_notify_ack_id_t notify_complete_id[TCP_MAX_NOTIFY_ACK]; 286 }; 287 288 #define TCP_NOTIFY_ACKNOWLEDGEMENT 0x212 /* Notify when data is acknowledged */ 289 #define MPTCP_SERVICE_TYPE 0x213 /* MPTCP Service type */ 290 #define TCP_FASTOPEN_FORCE_HEURISTICS 0x214 /* Make sure TFO-heuristics never get disabled */ 291 292 #define MPTCP_SVCTYPE_HANDOVER 0 /* Default 0 */ 293 #define MPTCP_SVCTYPE_INTERACTIVE 1 294 #define MPTCP_SVCTYPE_AGGREGATE 2 295 #define MPTCP_SVCTYPE_TARGET_BASED 3 296 #define MPTCP_SVCTYPE_PURE_HANDOVER 4 297 #define MPTCP_SVCTYPE_MAX 5 298 299 /* 300 * Specify minimum time in seconds before which an established 301 * TCP connection will not be dropped when there is no response from the 302 * peer 303 */ 304 #define TCP_RXT_MINIMUM_TIMEOUT 0x215 305 306 #define TCP_RXT_MINIMUM_TIMEOUT_LIMIT (5 * 60) /* Limit is 5 minutes */ 307 308 #define MPTCP_ALTERNATE_PORT 0x216 309 #define MPTCP_FORCE_ENABLE 0x217 310 #define TCP_FASTOPEN_FORCE_ENABLE 0x218 311 #define MPTCP_EXPECTED_PROGRESS_TARGET 0x219 312 #define MPTCP_FORCE_VERSION 0x21a 313 314 /* When adding new socket-options, you need to make sure MPTCP supports these as well! */ 315 316 /* 317 * The TCP_INFO socket option is a private API and is subject to change 318 */ 319 #pragma pack(4) 320 321 #define TCPI_OPT_TIMESTAMPS 0x01 322 #define TCPI_OPT_SACK 0x02 323 #define TCPI_OPT_WSCALE 0x04 324 #define TCPI_OPT_ECN 0x08 325 326 #define TCPI_FLAG_LOSSRECOVERY 0x01 /* Currently in loss recovery */ 327 #define TCPI_FLAG_STREAMING_ON 0x02 /* Streaming detection on */ 328 329 struct tcp_conn_status { 330 union { 331 struct { 332 unsigned int probe_activated : 1; 333 unsigned int write_probe_failed : 1; 334 unsigned int read_probe_failed : 1; 335 unsigned int conn_probe_failed : 1; 336 }; 337 uint32_t pad_field; 338 }; 339 }; 340 341 /* 342 * Add new fields to this structure at the end only. This will preserve 343 * binary compatibility. 344 */ 345 struct tcp_info { 346 u_int8_t tcpi_state; /* TCP FSM state. */ 347 u_int8_t tcpi_options; /* Options enabled on conn. */ 348 u_int8_t tcpi_snd_wscale; /* RFC1323 send shift value. */ 349 u_int8_t tcpi_rcv_wscale; /* RFC1323 recv shift value. */ 350 351 u_int32_t tcpi_flags; /* extra flags (TCPI_FLAG_xxx) */ 352 353 u_int32_t tcpi_rto; /* Retransmission timeout in milliseconds */ 354 u_int32_t tcpi_snd_mss; /* Max segment size for send. */ 355 u_int32_t tcpi_rcv_mss; /* Max segment size for receive. */ 356 357 u_int32_t tcpi_rttcur; /* Most recent value of RTT */ 358 u_int32_t tcpi_srtt; /* Sender's Smoothed RTT */ 359 u_int32_t tcpi_rttvar; /* RTT variance */ 360 u_int32_t tcpi_rttbest; /* Best RTT we've seen */ 361 362 u_int32_t tcpi_snd_ssthresh; /* Slow start threshold. */ 363 u_int32_t tcpi_snd_cwnd; /* Send congestion window. */ 364 365 u_int32_t tcpi_rcv_space; /* Advertised recv window. */ 366 367 u_int32_t tcpi_snd_wnd; /* Advertised send window. */ 368 u_int32_t tcpi_snd_nxt; /* Next egress seqno */ 369 u_int32_t tcpi_rcv_nxt; /* Next ingress seqno */ 370 371 int32_t tcpi_last_outif; /* if_index of interface used to send last */ 372 u_int32_t tcpi_snd_sbbytes; /* bytes in snd buffer including data inflight */ 373 374 u_int64_t tcpi_txpackets __attribute__((aligned(8))); /* total packets sent */ 375 u_int64_t tcpi_txbytes __attribute__((aligned(8))); 376 /* total bytes sent */ 377 u_int64_t tcpi_txretransmitbytes __attribute__((aligned(8))); 378 /* total bytes retransmitted */ 379 u_int64_t tcpi_txunacked __attribute__((aligned(8))); 380 /* current number of bytes not acknowledged */ 381 u_int64_t tcpi_rxpackets __attribute__((aligned(8))); /* total packets received */ 382 u_int64_t tcpi_rxbytes __attribute__((aligned(8))); 383 /* total bytes received */ 384 u_int64_t tcpi_rxduplicatebytes __attribute__((aligned(8))); 385 /* total duplicate bytes received */ 386 u_int64_t tcpi_rxoutoforderbytes __attribute__((aligned(8))); 387 /* total out of order bytes received */ 388 u_int64_t tcpi_snd_bw __attribute__((aligned(8))); /* measured send bandwidth in bits/sec */ 389 u_int8_t tcpi_synrexmits; /* Number of syn retransmits before connect */ 390 u_int8_t tcpi_unused1; 391 u_int16_t tcpi_unused2; 392 u_int64_t tcpi_cell_rxpackets __attribute((aligned(8))); /* packets received over cellular */ 393 u_int64_t tcpi_cell_rxbytes __attribute((aligned(8))); /* bytes received over cellular */ 394 u_int64_t tcpi_cell_txpackets __attribute((aligned(8))); /* packets transmitted over cellular */ 395 u_int64_t tcpi_cell_txbytes __attribute((aligned(8))); /* bytes transmitted over cellular */ 396 u_int64_t tcpi_wifi_rxpackets __attribute((aligned(8))); /* packets received over Wi-Fi */ 397 u_int64_t tcpi_wifi_rxbytes __attribute((aligned(8))); /* bytes received over Wi-Fi */ 398 u_int64_t tcpi_wifi_txpackets __attribute((aligned(8))); /* packets transmitted over Wi-Fi */ 399 u_int64_t tcpi_wifi_txbytes __attribute((aligned(8))); /* bytes transmitted over Wi-Fi */ 400 u_int64_t tcpi_wired_rxpackets __attribute((aligned(8))); /* packets received over Wired */ 401 u_int64_t tcpi_wired_rxbytes __attribute((aligned(8))); /* bytes received over Wired */ 402 u_int64_t tcpi_wired_txpackets __attribute((aligned(8))); /* packets transmitted over Wired */ 403 u_int64_t tcpi_wired_txbytes __attribute((aligned(8))); /* bytes transmitted over Wired */ 404 struct tcp_conn_status tcpi_connstatus; /* status of connection probes */ 405 406 u_int16_t 407 tcpi_tfo_cookie_req:1, /* Cookie requested? */ 408 tcpi_tfo_cookie_rcv:1, /* Cookie received? */ 409 tcpi_tfo_syn_loss:1, /* Fallback to reg. TCP after SYN-loss */ 410 tcpi_tfo_syn_data_sent:1, /* SYN+data has been sent out */ 411 tcpi_tfo_syn_data_acked:1, /* SYN+data has been fully acknowledged */ 412 tcpi_tfo_syn_data_rcv:1, /* Server received SYN+data with a valid cookie */ 413 tcpi_tfo_cookie_req_rcv:1, /* Server received cookie-request */ 414 tcpi_tfo_cookie_sent:1, /* Server announced cookie */ 415 tcpi_tfo_cookie_invalid:1, /* Server received an invalid cookie */ 416 tcpi_tfo_cookie_wrong:1, /* Our sent cookie was wrong */ 417 tcpi_tfo_no_cookie_rcv:1, /* We did not receive a cookie upon our request */ 418 tcpi_tfo_heuristics_disable:1, /* TFO-heuristics disabled it */ 419 tcpi_tfo_send_blackhole:1, /* A sending-blackhole got detected */ 420 tcpi_tfo_recv_blackhole:1, /* A receiver-blackhole got detected */ 421 tcpi_tfo_onebyte_proxy:1; /* A proxy acknowledges all but one byte of the SYN */ 422 423 u_int16_t tcpi_ecn_client_setup:1, /* Attempted ECN setup from client side */ 424 tcpi_ecn_server_setup:1, /* Attempted ECN setup from server side */ 425 tcpi_ecn_success:1, /* peer negotiated ECN */ 426 tcpi_ecn_lost_syn:1, /* Lost SYN with ECN setup */ 427 tcpi_ecn_lost_synack:1, /* Lost SYN-ACK with ECN setup */ 428 tcpi_local_peer:1, /* Local to the host or the subnet */ 429 tcpi_if_cell:1, /* Interface is cellular */ 430 tcpi_if_wifi:1, /* Interface is WiFi */ 431 tcpi_if_wired:1, /* Interface is wired - ethernet , thunderbolt etc,. */ 432 tcpi_if_wifi_infra:1, /* Interface is wifi infrastructure */ 433 tcpi_if_wifi_awdl:1, /* Interface is wifi AWDL */ 434 tcpi_snd_background:1, /* Using delay based algorithm on sender side */ 435 tcpi_rcv_background:1; /* Using delay based algorithm on receive side */ 436 437 u_int32_t tcpi_ecn_recv_ce; /* Packets received with CE */ 438 u_int32_t tcpi_ecn_recv_cwr; /* Packets received with CWR */ 439 440 u_int32_t tcpi_rcvoopack; /* out-of-order packets received */ 441 u_int32_t tcpi_pawsdrop; /* segments dropped due to PAWS */ 442 u_int32_t tcpi_sack_recovery_episode; /* SACK recovery episodes */ 443 u_int32_t tcpi_reordered_pkts; /* packets reorderd */ 444 u_int32_t tcpi_dsack_sent; /* Sent DSACK notification */ 445 u_int32_t tcpi_dsack_recvd; /* Received a valid DSACK option */ 446 u_int32_t tcpi_flowhash; /* Unique id for the connection */ 447 448 u_int64_t tcpi_txretransmitpackets __attribute__((aligned(8))); 449 450 #define TCPINFO_HAS_RCV_RTT 1 451 u_int32_t tcpi_rcv_srtt; /* Receiver's Smoothed RTT */ 452 }; 453 454 struct tcp_measure_bw_burst { 455 u_int32_t min_burst_size; /* Minimum number of packets to use */ 456 u_int32_t max_burst_size; /* Maximum number of packets to use */ 457 }; 458 459 /* 460 * Note that IPv6 link local addresses should have the appropriate scope ID 461 */ 462 463 struct info_tuple { 464 u_int8_t itpl_proto; 465 union { 466 struct sockaddr _itpl_sa; 467 struct sockaddr_in _itpl_sin; 468 struct sockaddr_in6 _itpl_sin6; 469 } itpl_localaddr; 470 union { 471 struct sockaddr _itpl_sa; 472 struct sockaddr_in _itpl_sin; 473 struct sockaddr_in6 _itpl_sin6; 474 } itpl_remoteaddr; 475 }; 476 477 #define itpl_local_sa itpl_localaddr._itpl_sa 478 #define itpl_local_sin itpl_localaddr._itpl_sin 479 #define itpl_local_sin6 itpl_localaddr._itpl_sin6 480 #define itpl_remote_sa itpl_remoteaddr._itpl_sa 481 #define itpl_remote_sin itpl_remoteaddr._itpl_sin 482 #define itpl_remote_sin6 itpl_remoteaddr._itpl_sin6 483 484 /* 485 * TCP connection info auxiliary data (CIAUX_TCP) 486 * 487 * Do not add new fields to this structure, just add them to tcp_info 488 * structure towards the end. This will preserve binary compatibility. 489 */ 490 typedef struct conninfo_tcp { 491 pid_t tcpci_peer_pid; /* loopback peer PID if > 0 */ 492 struct tcp_info tcpci_tcp_info; /* TCP info */ 493 } conninfo_tcp_t; 494 495 #pragma pack() 496 497 struct mptcp_itf_stats { 498 u_short ifindex; 499 uint16_t switches; 500 uint32_t is_expensive:1; 501 uint64_t mpis_txbytes __attribute__((aligned(8))); 502 uint64_t mpis_rxbytes __attribute__((aligned(8))); 503 uint64_t mpis_wifi_txbytes __attribute__((aligned(8))); 504 uint64_t mpis_wifi_rxbytes __attribute__((aligned(8))); 505 uint64_t mpis_wired_txbytes __attribute__((aligned(8))); 506 uint64_t mpis_wired_rxbytes __attribute__((aligned(8))); 507 uint64_t mpis_cell_txbytes __attribute__((aligned(8))); 508 uint64_t mpis_cell_rxbytes __attribute__((aligned(8))); 509 }; 510 511 /* Version solely used to let libnetcore survive */ 512 #define CONNINFO_MPTCP_VERSION 3 513 typedef struct conninfo_multipathtcp { 514 uint32_t mptcpci_subflow_count; 515 uint32_t mptcpci_switch_count; 516 sae_connid_t mptcpci_subflow_connids[4]; 517 518 uint64_t mptcpci_init_rxbytes; 519 uint64_t mptcpci_init_txbytes; 520 521 #define MPTCP_ITFSTATS_SIZE 4 522 struct mptcp_itf_stats mptcpci_itfstats[MPTCP_ITFSTATS_SIZE]; 523 524 uint32_t mptcpci_flags; 525 #define MPTCPCI_FIRSTPARTY 0x01 526 } conninfo_multipathtcp_t; 527 528 #endif /* PRIVATE */ 529 530 struct tcp_connection_info { 531 u_int8_t tcpi_state; /* connection state */ 532 u_int8_t tcpi_snd_wscale; /* Window scale for send window */ 533 u_int8_t tcpi_rcv_wscale; /* Window scale for receive window */ 534 u_int8_t __pad1; 535 u_int32_t tcpi_options; /* TCP options supported */ 536 #define TCPCI_OPT_TIMESTAMPS 0x00000001 /* Timestamps enabled */ 537 #define TCPCI_OPT_SACK 0x00000002 /* SACK enabled */ 538 #define TCPCI_OPT_WSCALE 0x00000004 /* Window scaling enabled */ 539 #define TCPCI_OPT_ECN 0x00000008 /* ECN enabled */ 540 u_int32_t tcpi_flags; /* flags */ 541 #define TCPCI_FLAG_LOSSRECOVERY 0x00000001 542 #define TCPCI_FLAG_REORDERING_DETECTED 0x00000002 543 u_int32_t tcpi_rto; /* retransmit timeout in ms */ 544 u_int32_t tcpi_maxseg; /* maximum segment size supported */ 545 u_int32_t tcpi_snd_ssthresh; /* slow start threshold in bytes */ 546 u_int32_t tcpi_snd_cwnd; /* send congestion window in bytes */ 547 u_int32_t tcpi_snd_wnd; /* send widnow in bytes */ 548 u_int32_t tcpi_snd_sbbytes; /* bytes in send socket buffer, including in-flight data */ 549 u_int32_t tcpi_rcv_wnd; /* receive window in bytes*/ 550 u_int32_t tcpi_rttcur; /* most recent RTT in ms */ 551 u_int32_t tcpi_srtt; /* average RTT in ms */ 552 u_int32_t tcpi_rttvar; /* RTT variance */ 553 u_int32_t 554 tcpi_tfo_cookie_req:1, /* Cookie requested? */ 555 tcpi_tfo_cookie_rcv:1, /* Cookie received? */ 556 tcpi_tfo_syn_loss:1, /* Fallback to reg. TCP after SYN-loss */ 557 tcpi_tfo_syn_data_sent:1, /* SYN+data has been sent out */ 558 tcpi_tfo_syn_data_acked:1, /* SYN+data has been fully acknowledged */ 559 tcpi_tfo_syn_data_rcv:1, /* Server received SYN+data with a valid cookie */ 560 tcpi_tfo_cookie_req_rcv:1, /* Server received cookie-request */ 561 tcpi_tfo_cookie_sent:1, /* Server announced cookie */ 562 tcpi_tfo_cookie_invalid:1, /* Server received an invalid cookie */ 563 tcpi_tfo_cookie_wrong:1, /* Our sent cookie was wrong */ 564 tcpi_tfo_no_cookie_rcv:1, /* We did not receive a cookie upon our request */ 565 tcpi_tfo_heuristics_disable:1, /* TFO-heuristics disabled it */ 566 tcpi_tfo_send_blackhole:1, /* A sending-blackhole got detected */ 567 tcpi_tfo_recv_blackhole:1, /* A receiver-blackhole got detected */ 568 tcpi_tfo_onebyte_proxy:1, /* A proxy acknowledges all but one byte of the SYN */ 569 __pad2:17; 570 u_int64_t tcpi_txpackets __attribute__((aligned(8))); 571 u_int64_t tcpi_txbytes __attribute__((aligned(8))); 572 u_int64_t tcpi_txretransmitbytes __attribute__((aligned(8))); 573 u_int64_t tcpi_rxpackets __attribute__((aligned(8))); 574 u_int64_t tcpi_rxbytes __attribute__((aligned(8))); 575 u_int64_t tcpi_rxoutoforderbytes __attribute__((aligned(8))); 576 u_int64_t tcpi_txretransmitpackets __attribute__((aligned(8))); 577 }; 578 #endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */ 579 580 #endif 581