1/*
2 * Copyright (c) 2000-2016 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#include <sys/types.h>
67#include <sys/appleapiopts.h>
68#include <machine/endian.h>
69#include <machine/types.h> /* __uint32_t */
70
71#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
72typedef __uint32_t tcp_seq;
73typedef __uint32_t tcp_cc; /* connection count per rfc1644 */
74
75#define tcp6_seq tcp_seq /* for KAME src sync over BSD*'s */
76#define tcp6hdr tcphdr /* for KAME src sync over BSD*'s */
77
78/*
79 * TCP header.
80 * Per RFC 793, September, 1981.
81 */
82struct tcphdr {
83 unsigned short th_sport; /* source port */
84 unsigned short th_dport; /* destination port */
85 tcp_seq th_seq; /* sequence number */
86 tcp_seq th_ack; /* acknowledgement number */
87#if __DARWIN_BYTE_ORDER == __DARWIN_LITTLE_ENDIAN
88 unsigned int th_x2:4, /* (unused) */
89 th_off:4; /* data offset */
90#endif
91#if __DARWIN_BYTE_ORDER == __DARWIN_BIG_ENDIAN
92 unsigned int th_off:4, /* data offset */
93 th_x2:4; /* (unused) */
94#endif
95 unsigned char th_flags;
96#define TH_FIN 0x01
97#define TH_SYN 0x02
98#define TH_RST 0x04
99#define TH_PUSH 0x08
100#define TH_ACK 0x10
101#define TH_URG 0x20
102#define TH_ECE 0x40
103#define TH_CWR 0x80
104#define TH_FLAGS (TH_FIN|TH_SYN|TH_RST|TH_ACK|TH_URG|TH_ECE|TH_CWR)
105#define TH_ACCEPT (TH_FIN|TH_SYN|TH_RST|TH_ACK)
106
107 unsigned short th_win; /* window */
108 unsigned short th_sum; /* checksum */
109 unsigned short th_urp; /* urgent pointer */
110};
111
112#define TCPOPT_EOL 0
113#define TCPOPT_NOP 1
114#define TCPOPT_MAXSEG 2
115#define TCPOLEN_MAXSEG 4
116#define TCPOPT_WINDOW 3
117#define TCPOLEN_WINDOW 3
118#define TCPOPT_SACK_PERMITTED 4 /* Experimental */
119#define TCPOLEN_SACK_PERMITTED 2
120#define TCPOPT_SACK 5 /* Experimental */
121#define TCPOLEN_SACK 8 /* len of sack block */
122#define TCPOPT_TIMESTAMP 8
123#define TCPOLEN_TIMESTAMP 10
124#define TCPOLEN_TSTAMP_APPA (TCPOLEN_TIMESTAMP+2) /* appendix A */
125#define TCPOPT_TSTAMP_HDR \
126 (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_TIMESTAMP<<8|TCPOLEN_TIMESTAMP)
127
128#define MAX_TCPOPTLEN 40 /* Absolute maximum TCP options len */
129
130#define TCPOPT_CC 11 /* CC options: RFC-1644 */
131#define TCPOPT_CCNEW 12
132#define TCPOPT_CCECHO 13
133#define TCPOLEN_CC 6
134#define TCPOLEN_CC_APPA (TCPOLEN_CC+2)
135#define TCPOPT_CC_HDR(ccopt) \
136 (TCPOPT_NOP<<24|TCPOPT_NOP<<16|(ccopt)<<8|TCPOLEN_CC)
137#define TCPOPT_SIGNATURE 19 /* Keyed MD5: RFC 2385 */
138#define TCPOLEN_SIGNATURE 18
139#if MPTCP
140#define TCPOPT_MULTIPATH 30
141#endif
142
143#define TCPOPT_FASTOPEN 34
144#define TCPOLEN_FASTOPEN_REQ 2
145
146/* Option definitions */
147#define TCPOPT_SACK_PERMIT_HDR \
148(TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_SACK_PERMITTED<<8|TCPOLEN_SACK_PERMITTED)
149#define TCPOPT_SACK_HDR (TCPOPT_NOP<<24|TCPOPT_NOP<<16|TCPOPT_SACK<<8)
150/* Miscellaneous constants */
151#define MAX_SACK_BLKS 6 /* Max # SACK blocks stored at sender side */
152
153/*
154 * A SACK option that specifies n blocks will have a length of (8*n + 2)
155 * bytes, so the 40 bytes available for TCP options can specify a
156 * maximum of 4 blocks.
157 */
158
159#define TCP_MAX_SACK 4 /* MAX # SACKs sent in any segment */
160
161
162/*
163 * Default maximum segment size for TCP.
164 * With an IP MTU of 576, this is 536,
165 * but 512 is probably more convenient.
166 * This should be defined as MIN(512, IP_MSS - sizeof (struct tcpiphdr)).
167 */
168#define TCP_MSS 512
169
170/*
171 * TCP_MINMSS is defined to be 216 which is fine for the smallest
172 * link MTU (256 bytes, SLIP interface) in the Internet.
173 * However it is very unlikely to come across such low MTU interfaces
174 * these days (anno dato 2004).
175 * Probably it can be set to 512 without ill effects. But we play safe.
176 * See tcp_subr.c tcp_minmss SYSCTL declaration for more comments.
177 * Setting this to "0" disables the minmss check.
178 */
179#define TCP_MINMSS 216
180
181/*
182 * Default maximum segment size for TCP6.
183 * With an IP6 MSS of 1280, this is 1220,
184 * but 1024 is probably more convenient. (xxx kazu in doubt)
185 * This should be defined as MIN(1024, IP6_MSS - sizeof (struct tcpip6hdr))
186 */
187#define TCP6_MSS 1024
188
189#define TCP_MAXWIN 65535 /* largest value for (unscaled) window */
190#define TTCP_CLIENT_SND_WND 4096 /* dflt send window for T/TCP client */
191
192#define TCP_MAX_WINSHIFT 14 /* maximum window shift */
193
194#define TCP_MAXHLEN (0xf<<2) /* max length of header in bytes */
195#define TCP_MAXOLEN (TCP_MAXHLEN - sizeof(struct tcphdr))
196 /* max space left for options */
197#endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */
198
199/*
200 * User-settable options (used with setsockopt).
201 */
202#define TCP_NODELAY 0x01 /* don't delay send to coalesce packets */
203#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
204#define TCP_MAXSEG 0x02 /* set maximum segment size */
205#define TCP_NOPUSH 0x04 /* don't push last block of write */
206#define TCP_NOOPT 0x08 /* don't use TCP options */
207#define TCP_KEEPALIVE 0x10 /* idle time used when SO_KEEPALIVE is enabled */
208#define TCP_CONNECTIONTIMEOUT 0x20 /* connection timeout */
209#define PERSIST_TIMEOUT 0x40 /* time after which a connection in
210 * persist timeout will terminate.
211 * see draft-ananth-tcpm-persist-02.txt
212 */
213#define TCP_RXT_CONNDROPTIME 0x80 /* time after which tcp retransmissions will be
214 * stopped and the connection will be dropped
215 */
216#define TCP_RXT_FINDROP 0x100 /* when this option is set, drop a connection
217 * after retransmitting the FIN 3 times. It will
218 * prevent holding too many mbufs in socket
219 * buffer queues.
220 */
221#define TCP_KEEPINTVL 0x101 /* interval between keepalives */
222#define TCP_KEEPCNT 0x102 /* number of keepalives before close */
223#define TCP_SENDMOREACKS 0x103 /* always ack every other packet */
224#define TCP_ENABLE_ECN 0x104 /* Enable ECN on a connection */
225#define TCP_FASTOPEN 0x105 /* Enable/Disable TCP Fastopen on this socket */
226#define TCP_CONNECTION_INFO 0x106 /* State of TCP connection */
227
228#ifdef PRIVATE
229#define TCP_INFO 0x200 /* retrieve tcp_info structure */
230#define TCP_MEASURE_SND_BW 0x202 /* Measure sender's bandwidth for this connection */
231#endif /* PRIVATE */
232
233
234#define TCP_NOTSENT_LOWAT 0x201 /* Low water mark for TCP unsent data */
235
236#ifdef PRIVATE
237#define TCP_MEASURE_BW_BURST 0x203 /* Burst size to use for bandwidth measurement */
238#define TCP_PEER_PID 0x204 /* Lookup pid of the process we're connected to */
239#define TCP_ADAPTIVE_READ_TIMEOUT 0x205 /* Read timeout used as a multiple of RTT */
240/*
241 * Enable message delivery on a socket, this feature is currently unsupported and
242 * is subjected to change in future.
243 */
244#define TCP_ENABLE_MSGS 0x206
245#define TCP_ADAPTIVE_WRITE_TIMEOUT 0x207 /* Write timeout used as a multiple of RTT */
246#define TCP_NOTIMEWAIT 0x208 /* Avoid going into time-wait */
247#define TCP_DISABLE_BLACKHOLE_DETECTION 0x209 /* disable PMTU blackhole detection */
248#define TCP_ECN_MODE 0x210 /* fine grain control for A/B testing */
249#define TCP_KEEPALIVE_OFFLOAD 0x211 /* offload keep alive processing to firmware */
250
251/*
252 * TCP_ECN_MODE values
253 */
254#define ECN_MODE_DEFAULT 0x0 /* per interface or system wide default */
255#define ECN_MODE_ENABLE 0x1 /* force enable ECN on connection */
256#define ECN_MODE_DISABLE 0x2 /* force disable ECN on connection */
257
258/*
259 * TCP_NOTIFY_ACKNOWLEDGEMENT
260 *
261 * Application can use this socket option to get a notification when
262 * data that is currently written to the socket is acknowledged. The input
263 * argument given to this socket option is a marker_id that will be used for
264 * returning the notification. The application can continue to write
265 * data after setting the marker. There can be multiple of these events
266 * outstanding on a socket at any time up to a max of TCP_MAX_NOTIFY_ACK.
267 *
268 * To get the completed notifications, getsockopt should be called with the
269 * TCP_NOTIFY_ACKNOWLEDGEMENT with the following tcp_notify_ack_complete
270 * structure as an out argument. At most TCP_MAX_NOTIFY_ACK ids will be
271 * returned if they have been successfully acknowledged in each call.
272 */
273
274#define TCP_MAX_NOTIFY_ACK 10
275
276typedef u_int32_t tcp_notify_ack_id_t;
277
278struct tcp_notify_ack_complete {
279 u_int32_t notify_pending; /* still pending */
280 u_int32_t notify_complete_count;
281 tcp_notify_ack_id_t notify_complete_id[TCP_MAX_NOTIFY_ACK];
282};
283
284#define TCP_NOTIFY_ACKNOWLEDGEMENT 0x212 /* Notify when data is acknowledged */
285#define MPTCP_SERVICE_TYPE 0x213 /* MPTCP Service type */
286#define TCP_FASTOPEN_FORCE_HEURISTICS 0x214 /* Make sure TFO-heuristics never get disabled */
287
288#define MPTCP_SVCTYPE_HANDOVER 0 /* Default 0 */
289#define MPTCP_SVCTYPE_INTERACTIVE 1
290#define MPTCP_SVCTYPE_AGGREGATE 2
291#define MPTCP_SVCTYPE_MAX 3
292/*
293 * Specify minimum time in seconds before which an established
294 * TCP connection will not be dropped when there is no response from the
295 * peer
296 */
297#define TCP_RXT_MINIMUM_TIMEOUT 0x215
298
299#define TCP_RXT_MINIMUM_TIMEOUT_LIMIT (5 * 60) /* Limit is 5 minutes */
300
301#define MPTCP_ALTERNATE_PORT 0x216
302
303/*
304 * The TCP_INFO socket option is a private API and is subject to change
305 */
306#pragma pack(4)
307
308#define TCPI_OPT_TIMESTAMPS 0x01
309#define TCPI_OPT_SACK 0x02
310#define TCPI_OPT_WSCALE 0x04
311#define TCPI_OPT_ECN 0x08
312
313#define TCPI_FLAG_LOSSRECOVERY 0x01 /* Currently in loss recovery */
314#define TCPI_FLAG_STREAMING_ON 0x02 /* Streaming detection on */
315
316struct tcp_conn_status {
317 unsigned int probe_activated : 1;
318 unsigned int write_probe_failed : 1;
319 unsigned int read_probe_failed : 1;
320 unsigned int conn_probe_failed : 1;
321};
322
323/*
324 * Add new fields to this structure at the end only. This will preserve
325 * binary compatibility.
326 */
327struct tcp_info {
328 u_int8_t tcpi_state; /* TCP FSM state. */
329 u_int8_t tcpi_options; /* Options enabled on conn. */
330 u_int8_t tcpi_snd_wscale; /* RFC1323 send shift value. */
331 u_int8_t tcpi_rcv_wscale; /* RFC1323 recv shift value. */
332
333 u_int32_t tcpi_flags; /* extra flags (TCPI_FLAG_xxx) */
334
335 u_int32_t tcpi_rto; /* Retransmission timeout in milliseconds */
336 u_int32_t tcpi_snd_mss; /* Max segment size for send. */
337 u_int32_t tcpi_rcv_mss; /* Max segment size for receive. */
338
339 u_int32_t tcpi_rttcur; /* Most recent value of RTT */
340 u_int32_t tcpi_srtt; /* Smoothed RTT */
341 u_int32_t tcpi_rttvar; /* RTT variance */
342 u_int32_t tcpi_rttbest; /* Best RTT we've seen */
343
344 u_int32_t tcpi_snd_ssthresh; /* Slow start threshold. */
345 u_int32_t tcpi_snd_cwnd; /* Send congestion window. */
346
347 u_int32_t tcpi_rcv_space; /* Advertised recv window. */
348
349 u_int32_t tcpi_snd_wnd; /* Advertised send window. */
350 u_int32_t tcpi_snd_nxt; /* Next egress seqno */
351 u_int32_t tcpi_rcv_nxt; /* Next ingress seqno */
352
353 int32_t tcpi_last_outif; /* if_index of interface used to send last */
354 u_int32_t tcpi_snd_sbbytes; /* bytes in snd buffer including data inflight */
355
356 u_int64_t tcpi_txpackets __attribute__((aligned(8))); /* total packets sent */
357 u_int64_t tcpi_txbytes __attribute__((aligned(8)));
358 /* total bytes sent */
359 u_int64_t tcpi_txretransmitbytes __attribute__((aligned(8)));
360 /* total bytes retransmitted */
361 u_int64_t tcpi_txunacked __attribute__((aligned(8)));
362 /* current number of bytes not acknowledged */
363 u_int64_t tcpi_rxpackets __attribute__((aligned(8))); /* total packets received */
364 u_int64_t tcpi_rxbytes __attribute__((aligned(8)));
365 /* total bytes received */
366 u_int64_t tcpi_rxduplicatebytes __attribute__((aligned(8)));
367 /* total duplicate bytes received */
368 u_int64_t tcpi_rxoutoforderbytes __attribute__((aligned(8)));
369 /* total out of order bytes received */
370 u_int64_t tcpi_snd_bw __attribute__((aligned(8))); /* measured send bandwidth in bits/sec */
371 u_int8_t tcpi_synrexmits; /* Number of syn retransmits before connect */
372 u_int8_t tcpi_unused1;
373 u_int16_t tcpi_unused2;
374 u_int64_t tcpi_cell_rxpackets __attribute((aligned(8))); /* packets received over cellular */
375 u_int64_t tcpi_cell_rxbytes __attribute((aligned(8))); /* bytes received over cellular */
376 u_int64_t tcpi_cell_txpackets __attribute((aligned(8))); /* packets transmitted over cellular */
377 u_int64_t tcpi_cell_txbytes __attribute((aligned(8))); /* bytes transmitted over cellular */
378 u_int64_t tcpi_wifi_rxpackets __attribute((aligned(8))); /* packets received over Wi-Fi */
379 u_int64_t tcpi_wifi_rxbytes __attribute((aligned(8))); /* bytes received over Wi-Fi */
380 u_int64_t tcpi_wifi_txpackets __attribute((aligned(8))); /* packets transmitted over Wi-Fi */
381 u_int64_t tcpi_wifi_txbytes __attribute((aligned(8))); /* bytes transmitted over Wi-Fi */
382 u_int64_t tcpi_wired_rxpackets __attribute((aligned(8))); /* packets received over Wired */
383 u_int64_t tcpi_wired_rxbytes __attribute((aligned(8))); /* bytes received over Wired */
384 u_int64_t tcpi_wired_txpackets __attribute((aligned(8))); /* packets transmitted over Wired */
385 u_int64_t tcpi_wired_txbytes __attribute((aligned(8))); /* bytes transmitted over Wired */
386 struct tcp_conn_status tcpi_connstatus; /* status of connection probes */
387
388 u_int16_t
389 tcpi_tfo_cookie_req:1, /* Cookie requested? */
390 tcpi_tfo_cookie_rcv:1, /* Cookie received? */
391 tcpi_tfo_syn_loss:1, /* Fallback to reg. TCP after SYN-loss */
392 tcpi_tfo_syn_data_sent:1, /* SYN+data has been sent out */
393 tcpi_tfo_syn_data_acked:1, /* SYN+data has been fully acknowledged */
394 tcpi_tfo_syn_data_rcv:1, /* Server received SYN+data with a valid cookie */
395 tcpi_tfo_cookie_req_rcv:1, /* Server received cookie-request */
396 tcpi_tfo_cookie_sent:1, /* Server announced cookie */
397 tcpi_tfo_cookie_invalid:1, /* Server received an invalid cookie */
398 tcpi_tfo_cookie_wrong:1, /* Our sent cookie was wrong */
399 tcpi_tfo_no_cookie_rcv:1, /* We did not receive a cookie upon our request */
400 tcpi_tfo_heuristics_disable:1, /* TFO-heuristics disabled it */
401 tcpi_tfo_send_blackhole:1, /* A sending-blackhole got detected */
402 tcpi_tfo_recv_blackhole:1, /* A receiver-blackhole got detected */
403 tcpi_tfo_onebyte_proxy:1; /* A proxy acknowledges all but one byte of the SYN */
404
405 u_int16_t tcpi_ecn_client_setup:1, /* Attempted ECN setup from client side */
406 tcpi_ecn_server_setup:1, /* Attempted ECN setup from server side */
407 tcpi_ecn_success:1, /* peer negotiated ECN */
408 tcpi_ecn_lost_syn:1, /* Lost SYN with ECN setup */
409 tcpi_ecn_lost_synack:1, /* Lost SYN-ACK with ECN setup */
410 tcpi_local_peer:1, /* Local to the host or the subnet */
411 tcpi_if_cell:1, /* Interface is cellular */
412 tcpi_if_wifi:1, /* Interface is WiFi */
413 tcpi_if_wired:1, /* Interface is wired - ethernet , thunderbolt etc,. */
414 tcpi_if_wifi_infra:1, /* Interface is wifi infrastructure */
415 tcpi_if_wifi_awdl:1, /* Interface is wifi AWDL */
416 tcpi_snd_background:1, /* Using delay based algorithm on sender side */
417 tcpi_rcv_background:1; /* Using delay based algorithm on receive side */
418
419 u_int32_t tcpi_ecn_recv_ce; /* Packets received with CE */
420 u_int32_t tcpi_ecn_recv_cwr; /* Packets received with CWR */
421
422 u_int32_t tcpi_rcvoopack; /* out-of-order packets received */
423 u_int32_t tcpi_pawsdrop; /* segments dropped due to PAWS */
424 u_int32_t tcpi_sack_recovery_episode; /* SACK recovery episodes */
425 u_int32_t tcpi_reordered_pkts; /* packets reorderd */
426 u_int32_t tcpi_dsack_sent; /* Sent DSACK notification */
427 u_int32_t tcpi_dsack_recvd; /* Received a valid DSACK option */
428 u_int32_t tcpi_flowhash; /* Unique id for the connection */
429
430 u_int64_t tcpi_txretransmitpackets __attribute__((aligned(8)));
431};
432
433struct tcp_measure_bw_burst {
434 u_int32_t min_burst_size; /* Minimum number of packets to use */
435 u_int32_t max_burst_size; /* Maximum number of packets to use */
436};
437
438/*
439 * Note that IPv6 link local addresses should have the appropriate scope ID
440 */
441
442struct info_tuple {
443 u_int8_t itpl_proto;
444 union {
445 struct sockaddr _itpl_sa;
446 struct sockaddr_in _itpl_sin;
447 struct sockaddr_in6 _itpl_sin6;
448 } itpl_localaddr;
449 union {
450 struct sockaddr _itpl_sa;
451 struct sockaddr_in _itpl_sin;
452 struct sockaddr_in6 _itpl_sin6;
453 } itpl_remoteaddr;
454};
455
456#define itpl_local_sa itpl_localaddr._itpl_sa
457#define itpl_local_sin itpl_localaddr._itpl_sin
458#define itpl_local_sin6 itpl_localaddr._itpl_sin6
459#define itpl_remote_sa itpl_remoteaddr._itpl_sa
460#define itpl_remote_sin itpl_remoteaddr._itpl_sin
461#define itpl_remote_sin6 itpl_remoteaddr._itpl_sin6
462
463/*
464 * TCP connection info auxiliary data (CIAUX_TCP)
465 *
466 * Do not add new fields to this structure, just add them to tcp_info
467 * structure towards the end. This will preserve binary compatibility.
468 */
469typedef struct conninfo_tcp {
470 pid_t tcpci_peer_pid; /* loopback peer PID if > 0 */
471 struct tcp_info tcpci_tcp_info; /* TCP info */
472} conninfo_tcp_t;
473
474#pragma pack()
475
476struct mptcp_itf_stats {
477 uint16_t ifindex;
478 uint16_t switches;
479 uint32_t is_expensive:1;
480 uint64_t mpis_txbytes __attribute__((aligned(8)));
481 uint64_t mpis_rxbytes __attribute__((aligned(8)));
482};
483
484/* Version solely used to let libnetcore survive */
485#define CONNINFO_MPTCP_VERSION 3
486typedef struct conninfo_multipathtcp {
487 uint32_t mptcpci_subflow_count;
488 uint32_t mptcpci_switch_count;
489 sae_connid_t mptcpci_subflow_connids[4];
490
491 uint64_t mptcpci_init_rxbytes;
492 uint64_t mptcpci_init_txbytes;
493
494#define MPTCP_ITFSTATS_SIZE 4
495 struct mptcp_itf_stats mptcpci_itfstats[MPTCP_ITFSTATS_SIZE];
496
497 uint32_t mptcpci_flags;
498#define MPTCPCI_FIRSTPARTY 0x01
499} conninfo_multipathtcp_t;
500
501#endif /* PRIVATE */
502
503struct tcp_connection_info {
504 u_int8_t tcpi_state; /* connection state */
505 u_int8_t tcpi_snd_wscale; /* Window scale for send window */
506 u_int8_t tcpi_rcv_wscale; /* Window scale for receive window */
507 u_int8_t __pad1;
508 u_int32_t tcpi_options; /* TCP options supported */
509#define TCPCI_OPT_TIMESTAMPS 0x00000001 /* Timestamps enabled */
510#define TCPCI_OPT_SACK 0x00000002 /* SACK enabled */
511#define TCPCI_OPT_WSCALE 0x00000004 /* Window scaling enabled */
512#define TCPCI_OPT_ECN 0x00000008 /* ECN enabled */
513 u_int32_t tcpi_flags; /* flags */
514#define TCPCI_FLAG_LOSSRECOVERY 0x00000001
515#define TCPCI_FLAG_REORDERING_DETECTED 0x00000002
516 u_int32_t tcpi_rto; /* retransmit timeout in ms */
517 u_int32_t tcpi_maxseg; /* maximum segment size supported */
518 u_int32_t tcpi_snd_ssthresh; /* slow start threshold in bytes */
519 u_int32_t tcpi_snd_cwnd; /* send congestion window in bytes */
520 u_int32_t tcpi_snd_wnd; /* send widnow in bytes */
521 u_int32_t tcpi_snd_sbbytes; /* bytes in send socket buffer, including in-flight data */
522 u_int32_t tcpi_rcv_wnd; /* receive window in bytes*/
523 u_int32_t tcpi_rttcur; /* most recent RTT in ms */
524 u_int32_t tcpi_srtt; /* average RTT in ms */
525 u_int32_t tcpi_rttvar; /* RTT variance */
526 u_int32_t
527 tcpi_tfo_cookie_req:1, /* Cookie requested? */
528 tcpi_tfo_cookie_rcv:1, /* Cookie received? */
529 tcpi_tfo_syn_loss:1, /* Fallback to reg. TCP after SYN-loss */
530 tcpi_tfo_syn_data_sent:1, /* SYN+data has been sent out */
531 tcpi_tfo_syn_data_acked:1, /* SYN+data has been fully acknowledged */
532 tcpi_tfo_syn_data_rcv:1, /* Server received SYN+data with a valid cookie */
533 tcpi_tfo_cookie_req_rcv:1, /* Server received cookie-request */
534 tcpi_tfo_cookie_sent:1, /* Server announced cookie */
535 tcpi_tfo_cookie_invalid:1, /* Server received an invalid cookie */
536 tcpi_tfo_cookie_wrong:1, /* Our sent cookie was wrong */
537 tcpi_tfo_no_cookie_rcv:1, /* We did not receive a cookie upon our request */
538 tcpi_tfo_heuristics_disable:1, /* TFO-heuristics disabled it */
539 tcpi_tfo_send_blackhole:1, /* A sending-blackhole got detected */
540 tcpi_tfo_recv_blackhole:1, /* A receiver-blackhole got detected */
541 tcpi_tfo_onebyte_proxy:1, /* A proxy acknowledges all but one byte of the SYN */
542 __pad2:17;
543 u_int64_t tcpi_txpackets __attribute__((aligned(8)));
544 u_int64_t tcpi_txbytes __attribute__((aligned(8)));
545 u_int64_t tcpi_txretransmitbytes __attribute__((aligned(8)));
546 u_int64_t tcpi_rxpackets __attribute__((aligned(8)));
547 u_int64_t tcpi_rxbytes __attribute__((aligned(8)));
548 u_int64_t tcpi_rxoutoforderbytes __attribute__((aligned(8)));
549 u_int64_t tcpi_txretransmitpackets __attribute__((aligned(8)));
550};
551#endif /* (_POSIX_C_SOURCE && !_DARWIN_C_SOURCE) */
552
553#endif
554