1/*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1982, 1986, 1993, 1994, 1995 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32#ifndef _NETINET_TCP_VAR_H_ 33#define _NETINET_TCP_VAR_H_ 34 35#include <netinet/tcp.h> 36#include <netinet/tcp_fsm.h> 37 38#ifdef _KERNEL 39#include <net/vnet.h> 40#include <sys/mbuf.h> 41#include <sys/ktls.h> 42#endif 43 44#define TCP_END_BYTE_INFO 8 /* Bytes that makeup the "end information array" */ 45/* Types of ending byte info */ 46#define TCP_EI_EMPTY_SLOT 0 47#define TCP_EI_STATUS_CLIENT_FIN 0x1 48#define TCP_EI_STATUS_CLIENT_RST 0x2 49#define TCP_EI_STATUS_SERVER_FIN 0x3 50#define TCP_EI_STATUS_SERVER_RST 0x4 51#define TCP_EI_STATUS_RETRAN 0x5 52#define TCP_EI_STATUS_PROGRESS 0x6 53#define TCP_EI_STATUS_PERSIST_MAX 0x7 54#define TCP_EI_STATUS_KEEP_MAX 0x8 55#define TCP_EI_STATUS_DATA_A_CLOSE 0x9 56#define TCP_EI_STATUS_RST_IN_FRONT 0xa 57#define TCP_EI_STATUS_2MSL 0xb 58#define TCP_EI_STATUS_MAX_VALUE 0xb 59 60#define TCP_TRK_REQ_LOG_NEW 0x01 61#define TCP_TRK_REQ_LOG_COMPLETE 0x02 62#define TCP_TRK_REQ_LOG_FREED 0x03 63#define TCP_TRK_REQ_LOG_ALLOCFAIL 0x04 64#define TCP_TRK_REQ_LOG_MOREYET 0x05 65#define TCP_TRK_REQ_LOG_FORCEFREE 0x06 66#define TCP_TRK_REQ_LOG_STALE 0x07 67#define TCP_TRK_REQ_LOG_SEARCH 0x08 68 69/************************************************/ 70/* Status bits we track to assure no duplicates, 71 * the bits here are not used by the code but 72 * for human representation. To check a bit we 73 * take and shift over by 1 minus the value (1-8). 74 */ 75/************************************************/ 76#define TCP_EI_BITS_CLIENT_FIN 0x001 77#define TCP_EI_BITS_CLIENT_RST 0x002 78#define TCP_EI_BITS_SERVER_FIN 0x004 79#define TCP_EI_BITS_SERVER_RST 0x008 80#define TCP_EI_BITS_RETRAN 0x010 81#define TCP_EI_BITS_PROGRESS 0x020 82#define TCP_EI_BITS_PRESIST_MAX 0x040 83#define TCP_EI_BITS_KEEP_MAX 0x080 84#define TCP_EI_BITS_DATA_A_CLO 0x100 85#define TCP_EI_BITS_RST_IN_FR 0x200 /* a front state reset */ 86#define TCP_EI_BITS_2MS_TIMER 0x400 /* 2 MSL timer expired */ 87 88#if defined(_KERNEL) || defined(_WANT_TCPCB) 89#include <sys/_callout.h> 90#include <sys/osd.h> 91 92#include <netinet/cc/cc.h> 93 94/* TCP segment queue entry */ 95struct tseg_qent { 96 TAILQ_ENTRY(tseg_qent) tqe_q; 97 struct mbuf *tqe_m; /* mbuf contains packet */ 98 struct mbuf *tqe_last; /* last mbuf in chain */ 99 tcp_seq tqe_start; /* TCP Sequence number start */ 100 int tqe_len; /* TCP segment data length */ 101 uint32_t tqe_flags; /* The flags from tcp_get_flags() */ 102 uint32_t tqe_mbuf_cnt; /* Count of mbuf overhead */ 103}; 104TAILQ_HEAD(tsegqe_head, tseg_qent); 105 106struct sackblk { 107 tcp_seq start; /* start seq no. of sack block */ 108 tcp_seq end; /* end seq no. */ 109}; 110 111struct sackhole { 112 tcp_seq start; /* start seq no. of hole */ 113 tcp_seq end; /* end seq no. */ 114 tcp_seq rxmit; /* next seq. no in hole to be retransmitted */ 115 TAILQ_ENTRY(sackhole) scblink; /* scoreboard linkage */ 116}; 117 118struct sackhint { 119 struct sackhole *nexthole; 120 int32_t sack_bytes_rexmit; 121 tcp_seq last_sack_ack; /* Most recent/largest sacked ack */ 122 123 int32_t delivered_data; /* Newly acked data from last SACK */ 124 125 int32_t sacked_bytes; /* Total sacked bytes reported by the 126 * receiver via sack option 127 */ 128 uint32_t recover_fs; /* Flight Size at the start of Loss recovery */ 129 uint32_t prr_delivered; /* Total bytes delivered using PRR */ 130 uint32_t prr_out; /* Bytes sent during IN_RECOVERY */ 131 int32_t hole_bytes; /* current number of bytes in scoreboard holes */ 132 int32_t lost_bytes; /* number of rfc6675 IsLost() bytes */ 133}; 134 135#define SEGQ_EMPTY(tp) TAILQ_EMPTY(&(tp)->t_segq) 136 137STAILQ_HEAD(tcp_log_stailq, tcp_log_mem); 138 139#define TCP_TRK_TRACK_FLG_EMPTY 0x00 /* Available */ 140#define TCP_TRK_TRACK_FLG_USED 0x01 /* In use */ 141#define TCP_TRK_TRACK_FLG_OPEN 0x02 /* End is not valid (open range request) */ 142#define TCP_TRK_TRACK_FLG_SEQV 0x04 /* We had a sendfile that touched it */ 143#define TCP_TRK_TRACK_FLG_COMP 0x08 /* Sendfile as placed the last bits (range req only) */ 144#define TCP_TRK_TRACK_FLG_FSND 0x10 /* First send has been done into the seq space */ 145#define TCP_TRK_TRACK_FLG_LSND 0x20 /* We were able to set the Last Sent */ 146#define MAX_TCP_TRK_REQ 5 /* Max we will have at once */ 147 148struct tcp_sendfile_track { 149 uint64_t timestamp; /* User sent timestamp */ 150 uint64_t start; /* Start of sendfile offset */ 151 uint64_t end; /* End if not open-range req */ 152 uint64_t localtime; /* Time we actually got the req */ 153 uint64_t deadline; /* If in CU mode, deadline to delivery */ 154 uint64_t first_send; /* Time of first send in the range */ 155 uint64_t cspr; /* Client suggested pace rate */ 156 uint64_t sent_at_fs; /* What was t_sndbytes as we begun sending */ 157 uint64_t rxt_at_fs; /* What was t_snd_rxt_bytes as we begun sending */ 158 uint64_t sent_at_ls; /* Sent value at the last send */ 159 uint64_t rxt_at_ls; /* Retransmit value at the last send */ 160 tcp_seq start_seq; /* First TCP Seq assigned */ 161 tcp_seq end_seq; /* If range req last seq */ 162 uint32_t flags; /* Type of request open etc */ 163 uint32_t sbcc_at_s; /* When we allocate what is the sb_cc */ 164 uint32_t hint_maxseg; /* Client hinted maxseg */ 165 uint32_t playout_ms; /* Client playout ms */ 166 uint32_t hybrid_flags; /* Hybrid flags on this request */ 167}; 168 169 170/* 171 * Change Query responses for a stack switch we create a structure 172 * that allows query response from the new stack to the old, if 173 * supported. 174 * 175 * There are three queries currently defined. 176 * - sendmap 177 * - timers 178 * - rack_times 179 * 180 * For the sendmap query the caller fills in the 181 * req and the req_param as the first seq (usually 182 * snd_una). When the response comes back indicating 183 * that there was data (return value 1), then the caller 184 * can build a sendmap entry based on the range and the 185 * times. The next query would then be done at the 186 * newly created sendmap_end. Repeated until sendmap_end == snd_max. 187 * 188 * Flags in sendmap_flags are defined below as well. 189 * 190 * For timers the standard PACE_TMR_XXXX flags are returned indicating 191 * a pacing timer (possibly) and one other timer. If pacing timer then 192 * the expiration timeout time in microseconds is in timer_pacing_to. 193 * And the value used with whatever timer (if a flag is set) is in 194 * timer_rxt. If no timers are running a 0 is returned and of 195 * course no flags are set in timer_hpts_flags. 196 * 197 * The rack_times are a misc collection of information that 198 * the old stack might possibly fill in. Of course its possible 199 * that an old stack may not have a piece of information. If so 200 * then setting that value to zero is advised. Setting any 201 * timestamp passed should only place a zero in it when it 202 * is unfilled. This may mean that a time is off by a micro-second 203 * but this is ok in the grand scheme of things. 204 * 205 * When switching stacks it is desireable to get as much information 206 * from the old stack to the new stack as possible. Though not always 207 * will the stack be compatible in the types of information. The 208 * init() function needs to take care when it begins changing 209 * things such as inp_flags2 and the timer units to position these 210 * changes at a point where it is unlikely they will fail after 211 * making such changes. A stack optionally can have an "undo" 212 * function 213 * 214 * To transfer information to the old stack from the new in 215 * respect to LRO and the inp_flags2, the new stack should set 216 * the inp_flags2 to what it supports. The old stack in its 217 * fini() function should call the tcp_handle_orphaned_packets() 218 * to clean up any packets. Note that a new stack should attempt 219 */ 220 221/* Query types */ 222#define TCP_QUERY_SENDMAP 1 223#define TCP_QUERY_TIMERS_UP 2 224#define TCP_QUERY_RACK_TIMES 3 225 226/* Flags returned in sendmap_flags */ 227#define SNDMAP_ACKED 0x000001/* The remote endpoint acked this */ 228#define SNDMAP_OVERMAX 0x000008/* We have more retran's then we can fit */ 229#define SNDMAP_SACK_PASSED 0x000010/* A sack was done above this block */ 230#define SNDMAP_HAS_FIN 0x000040/* segment is sent with fin */ 231#define SNDMAP_TLP 0x000080/* segment sent as tail-loss-probe */ 232#define SNDMAP_HAS_SYN 0x000800/* SYN is on this guy */ 233#define SNDMAP_HAD_PUSH 0x008000/* Push was sent on original send */ 234#define SNDMAP_MASK (SNDMAP_ACKED|SNDMAP_OVERMAX|SNDMAP_SACK_PASSED|SNDMAP_HAS_FIN\ 235 |SNDMAP_TLP|SNDMAP_HAS_SYN|SNDMAP_HAD_PUSH) 236#define SNDMAP_NRTX 3 237 238struct tcp_query_resp { 239 int req; 240 uint32_t req_param; 241 union { 242 struct { 243 tcp_seq sendmap_start; 244 tcp_seq sendmap_end; 245 int sendmap_send_cnt; 246 uint64_t sendmap_time[SNDMAP_NRTX]; 247 uint64_t sendmap_ack_arrival; 248 int sendmap_flags; 249 uint32_t sendmap_r_rtr_bytes; 250 /* If FAS is available if not 0 */ 251 uint32_t sendmap_fas; 252 uint8_t sendmap_dupacks; 253 }; 254 struct { 255 uint32_t timer_hpts_flags; 256 uint32_t timer_pacing_to; 257 uint32_t timer_timer_exp; 258 }; 259 struct { 260 /* Timestamps and rtt's */ 261 uint32_t rack_reorder_ts; /* Last uscts that reordering was seen */ 262 uint32_t rack_num_dsacks; /* Num of dsacks seen */ 263 uint32_t rack_rxt_last_time; /* Last time a RXT/TLP or rack tmr went off */ 264 uint32_t rack_min_rtt; /* never 0 smallest rtt seen */ 265 uint32_t rack_rtt; /* Last rtt used by rack */ 266 uint32_t rack_tmit_time; /* The time the rtt seg was tmited */ 267 uint32_t rack_time_went_idle; /* If in persist the time we went idle */ 268 /* Prr data */ 269 uint32_t rack_sacked; 270 uint32_t rack_holes_rxt; 271 uint32_t rack_prr_delivered; 272 uint32_t rack_prr_recovery_fs; 273 uint32_t rack_prr_out; 274 uint32_t rack_prr_sndcnt; 275 /* TLP data */ 276 uint16_t rack_tlp_cnt_out; /* How many tlp's have been sent */ 277 /* Various bits */ 278 uint8_t rack_tlp_out; /* Is a TLP outstanding */ 279 uint8_t rack_srtt_measured; /* The previous stack has measured srtt */ 280 uint8_t rack_in_persist; /* Is the old stack in persists? */ 281 uint8_t rack_wanted_output; /* Did the prevous stack have a want output set */ 282 }; 283 }; 284}; 285 286#define TCP_TMR_GRANULARITY_TICKS 1 /* TCP timers are in ticks (msec if hz=1000) */ 287#define TCP_TMR_GRANULARITY_USEC 2 /* TCP timers are in microseconds */ 288 289typedef enum { 290 TT_REXMT = 0, 291 TT_PERSIST, 292 TT_KEEP, 293 TT_2MSL, 294 TT_DELACK, 295 TT_N, 296} tt_which; 297 298typedef enum { 299 TT_PROCESSING = 0, 300 TT_PROCESSED, 301 TT_STARTING, 302 TT_STOPPING, 303} tt_what; 304 305/* 306 * Tcp control block, one per tcp connection. 307 */ 308struct tcpcb { 309 struct inpcb t_inpcb; /* embedded protocol independent cb */ 310#define t_start_zero t_fb 311#define t_zero_size (sizeof(struct tcpcb) - \ 312 offsetof(struct tcpcb, t_start_zero)) 313 struct tcp_function_block *t_fb;/* TCP function call block */ 314 void *t_fb_ptr; /* Pointer to t_fb specific data */ 315 316 struct callout t_callout; 317 sbintime_t t_timers[TT_N]; 318 sbintime_t t_precisions[TT_N]; 319 320 /* HPTS. Used by BBR and Rack stacks. See tcp_hpts.c for more info. */ 321 TAILQ_ENTRY(tcpcb) t_hpts; /* linkage to HPTS ring */ 322 STAILQ_HEAD(, mbuf) t_inqueue; /* HPTS input packets queue */ 323 uint32_t t_hpts_request; /* Current hpts request, zero if 324 * fits in the pacing window. */ 325 uint32_t t_hpts_slot; /* HPTS wheel slot this tcb is. */ 326 uint32_t t_hpts_drop_reas; /* Reason we are dropping the pcb. */ 327 uint32_t t_hpts_gencnt; 328 uint16_t t_hpts_cpu; /* CPU chosen by hpts_cpuid(). */ 329 uint16_t t_lro_cpu; /* CPU derived from LRO. */ 330#define HPTS_CPU_NONE ((uint16_t)-1) 331 enum { 332 IHPTS_NONE = 0, 333 IHPTS_ONQUEUE, 334 IHPTS_MOVING, 335 } t_in_hpts; /* Is it linked into HPTS? */ 336 337 uint32_t t_maxseg:24, /* maximum segment size */ 338 _t_logstate:8; /* State of "black box" logging */ 339 uint32_t t_port:16, /* Tunneling (over udp) port */ 340 t_state:4, /* state of this connection */ 341 t_idle_reduce : 1, 342 t_delayed_ack: 7, /* Delayed ack variable */ 343 t_fin_is_rst: 1, /* Are fin's treated as resets */ 344 t_log_state_set: 1, 345 bits_spare : 2; 346 u_int t_flags; 347 tcp_seq snd_una; /* sent but unacknowledged */ 348 tcp_seq snd_max; /* highest sequence number sent; 349 * used to recognize retransmits 350 */ 351 tcp_seq snd_nxt; /* send next */ 352 tcp_seq snd_up; /* send urgent pointer */ 353 uint32_t snd_wnd; /* send window */ 354 uint32_t snd_cwnd; /* congestion-controlled window */ 355 uint32_t ts_offset; /* our timestamp offset */ 356 uint32_t rfbuf_ts; /* recv buffer autoscaling timestamp */ 357 int rcv_numsacks; /* # distinct sack blks present */ 358 u_int t_tsomax; /* TSO total burst length limit */ 359 u_int t_tsomaxsegcount; /* TSO maximum segment count */ 360 u_int t_tsomaxsegsize; /* TSO maximum segment size in bytes */ 361 tcp_seq rcv_nxt; /* receive next */ 362 tcp_seq rcv_adv; /* advertised window */ 363 uint32_t rcv_wnd; /* receive window */ 364 u_int t_flags2; /* More tcpcb flags storage */ 365 int t_srtt; /* smoothed round-trip time */ 366 int t_rttvar; /* variance in round-trip time */ 367 uint32_t ts_recent; /* timestamp echo data */ 368 u_char snd_scale; /* window scaling for send window */ 369 u_char rcv_scale; /* window scaling for recv window */ 370 u_char snd_limited; /* segments limited transmitted */ 371 u_char request_r_scale; /* pending window scaling */ 372 tcp_seq last_ack_sent; 373 u_int t_rcvtime; /* inactivity time */ 374 tcp_seq rcv_up; /* receive urgent pointer */ 375 int t_segqlen; /* segment reassembly queue length */ 376 uint32_t t_segqmbuflen; /* total reassembly queue byte length */ 377 struct tsegqe_head t_segq; /* segment reassembly queue */ 378 uint32_t snd_ssthresh; /* snd_cwnd size threshold for 379 * for slow start exponential to 380 * linear switch 381 */ 382 tcp_seq snd_wl1; /* window update seg seq number */ 383 tcp_seq snd_wl2; /* window update seg ack number */ 384 385 tcp_seq irs; /* initial receive sequence number */ 386 tcp_seq iss; /* initial send sequence number */ 387 u_int t_acktime; /* RACK and BBR incoming new data was acked */ 388 u_int t_sndtime; /* time last data was sent */ 389 u_int ts_recent_age; /* when last updated */ 390 tcp_seq snd_recover; /* for use in NewReno Fast Recovery */ 391 char t_oobflags; /* have some */ 392 char t_iobc; /* input character */ 393 uint8_t t_nic_ktls_xmit:1, /* active nic ktls xmit sessions */ 394 t_nic_ktls_xmit_dis:1, /* disabled nic xmit ktls? */ 395 t_nic_ktls_spare:6; /* spare nic ktls */ 396 int t_rxtcur; /* current retransmit value (ticks) */ 397 398 int t_rxtshift; /* log(2) of rexmt exp. backoff */ 399 u_int t_rtttime; /* RTT measurement start time */ 400 401 tcp_seq t_rtseq; /* sequence number being timed */ 402 u_int t_starttime; /* time connection was established */ 403 u_int t_fbyte_in; /* ticks time first byte queued in */ 404 u_int t_fbyte_out; /* ticks time first byte queued out */ 405 406 u_int t_pmtud_saved_maxseg; /* pre-blackhole MSS */ 407 int t_blackhole_enter; /* when to enter blackhole detection */ 408 int t_blackhole_exit; /* when to exit blackhole detection */ 409 u_int t_rttmin; /* minimum rtt allowed */ 410 411 int t_softerror; /* possible error not yet reported */ 412 uint32_t max_sndwnd; /* largest window peer has offered */ 413 uint32_t snd_cwnd_prev; /* cwnd prior to retransmit */ 414 uint32_t snd_ssthresh_prev; /* ssthresh prior to retransmit */ 415 tcp_seq snd_recover_prev; /* snd_recover prior to retransmit */ 416 int t_sndzerowin; /* zero-window updates sent */ 417 int snd_numholes; /* number of holes seen by sender */ 418 u_int t_badrxtwin; /* window for retransmit recovery */ 419 TAILQ_HEAD(sackhole_head, sackhole) snd_holes; 420 /* SACK scoreboard (sorted) */ 421 tcp_seq snd_fack; /* last seq number(+1) sack'd by rcv'r*/ 422 struct sackblk sackblks[MAX_SACK_BLKS]; /* seq nos. of sack blocks */ 423 struct sackhint sackhint; /* SACK scoreboard hint */ 424 int t_rttlow; /* smallest observerved RTT */ 425 int rfbuf_cnt; /* recv buffer autoscaling byte count */ 426 struct toedev *tod; /* toedev handling this connection */ 427 int t_sndrexmitpack; /* retransmit packets sent */ 428 int t_rcvoopack; /* out-of-order packets received */ 429 void *t_toe; /* TOE pcb pointer */ 430 struct cc_algo *t_cc; /* congestion control algorithm */ 431 struct cc_var t_ccv; /* congestion control specific vars */ 432 int t_bytes_acked; /* # bytes acked during current RTT */ 433 u_int t_maxunacktime; 434 u_int t_keepinit; /* time to establish connection */ 435 u_int t_keepidle; /* time before keepalive probes begin */ 436 u_int t_keepintvl; /* interval between keepalives */ 437 u_int t_keepcnt; /* number of keepalives before close */ 438 int t_dupacks; /* consecutive dup acks recd */ 439 int t_lognum; /* Number of log entries */ 440 int t_loglimit; /* Maximum number of log entries */ 441 uint32_t t_rcep; /* Number of received CE marked pkts */ 442 uint32_t t_scep; /* Synced number of delivered CE pkts */ 443 int64_t t_pacing_rate; /* bytes / sec, -1 => unlimited */ 444 struct tcp_log_stailq t_logs; /* Log buffer */ 445 struct tcp_log_id_node *t_lin; 446 struct tcp_log_id_bucket *t_lib; 447 const char *t_output_caller; /* Function that called tcp_output */ 448 struct statsblob *t_stats; /* Per-connection stats */ 449 /* Should these be a pointer to the arrays or an array? */ 450 uint32_t t_logsn; /* Log "serial number" */ 451 uint32_t gput_ts; /* Time goodput measurement started */ 452 tcp_seq gput_seq; /* Outbound measurement seq */ 453 tcp_seq gput_ack; /* Inbound measurement ack */ 454 int32_t t_stats_gput_prev; /* XXXLAS: Prev gput measurement */ 455 uint32_t t_maxpeakrate; /* max peak rate set by user, bytes/s */ 456 uint32_t t_sndtlppack; /* tail loss probe packets sent */ 457 uint64_t t_sndtlpbyte; /* total tail loss probe bytes sent */ 458 uint64_t t_sndbytes; /* total bytes sent */ 459 uint64_t t_snd_rxt_bytes; /* total bytes retransmitted */ 460 uint32_t t_dsack_bytes; /* dsack bytes received */ 461 uint32_t t_dsack_tlp_bytes; /* dsack bytes received for TLPs sent */ 462 uint32_t t_dsack_pack; /* dsack packets we have eceived */ 463 uint8_t t_tmr_granularity; /* Granularity of all timers srtt etc */ 464 uint8_t t_rttupdated; /* number of times rtt sampled */ 465 /* TCP Fast Open */ 466 uint8_t t_tfo_client_cookie_len; /* TFO client cookie length */ 467 uint32_t t_end_info_status; /* Status flag of end info */ 468 unsigned int *t_tfo_pending; /* TFO server pending counter */ 469 union { 470 uint8_t client[TCP_FASTOPEN_MAX_COOKIE_LEN]; 471 uint64_t server; 472 } t_tfo_cookie; /* TCP Fast Open cookie to send */ 473 union { 474 uint8_t t_end_info_bytes[TCP_END_BYTE_INFO]; 475 uint64_t t_end_info; 476 }; 477 struct osd t_osd; /* storage for Khelp module data */ 478 uint8_t _t_logpoint; /* Used when a BB log points is enabled */ 479 /* 480 * Keep all #ifdef'ed components at the end of the structure! 481 * This is important to minimize problems when compiling modules 482 * using this structure from within the modules' directory. 483 */ 484#ifdef TCP_REQUEST_TRK 485 /* Response tracking addons. */ 486 uint8_t t_tcpreq_req; /* Request count */ 487 uint8_t t_tcpreq_open; /* Number of open range requests */ 488 uint8_t t_tcpreq_closed; /* Number of closed range requests */ 489 uint32_t tcp_hybrid_start; /* Num of times we started hybrid pacing */ 490 uint32_t tcp_hybrid_stop; /* Num of times we stopped hybrid pacing */ 491 uint32_t tcp_hybrid_error; /* Num of times we failed to start hybrid pacing */ 492 struct tcp_sendfile_track t_tcpreq_info[MAX_TCP_TRK_REQ]; 493#endif 494#ifdef TCP_ACCOUNTING 495 uint64_t tcp_cnt_counters[TCP_NUM_CNT_COUNTERS]; 496 uint64_t tcp_proc_time[TCP_NUM_CNT_COUNTERS]; 497#endif 498#ifdef TCPPCAP 499 struct mbufq t_inpkts; /* List of saved input packets. */ 500 struct mbufq t_outpkts; /* List of saved output packets. */ 501#endif 502}; 503#endif /* _KERNEL || _WANT_TCPCB */ 504 505#ifdef _KERNEL 506struct tcptemp { 507 u_char tt_ipgen[40]; /* the size must be of max ip header, now IPv6 */ 508 struct tcphdr tt_t; 509}; 510 511/* SACK scoreboard update status */ 512typedef enum { 513 SACK_NOCHANGE = 0, 514 SACK_CHANGE, 515 SACK_NEWLOSS 516} sackstatus_t; 517 518/* Enable TCP/UDP tunneling port */ 519#define TCP_TUNNELING_PORT_MIN 0 520#define TCP_TUNNELING_PORT_MAX 65535 521#define TCP_TUNNELING_PORT_DEFAULT 0 522 523/* Enable TCP/UDP tunneling port */ 524#define TCP_TUNNELING_OVERHEAD_MIN sizeof(struct udphdr) 525#define TCP_TUNNELING_OVERHEAD_MAX 1024 526#define TCP_TUNNELING_OVERHEAD_DEFAULT TCP_TUNNELING_OVERHEAD_MIN 527 528/* Minimum map entries limit value, if set */ 529#define TCP_MIN_MAP_ENTRIES_LIMIT 128 530 531/* 532 * TODO: We yet need to brave plowing in 533 * to tcp_input() and the pru_usrreq() block. 534 * Right now these go to the old standards which 535 * are somewhat ok, but in the long term may 536 * need to be changed. If we do tackle tcp_input() 537 * then we need to get rid of the tcp_do_segment() 538 * function below. 539 */ 540/* Flags for tcp functions */ 541#define TCP_FUNC_BEING_REMOVED 0x01 /* Can no longer be referenced */ 542#define TCP_FUNC_OUTPUT_CANDROP 0x02 /* tfb_tcp_output may ask tcp_drop */ 543 544/** 545 * Adding a tfb_tcp_handoff_ok function allows the socket 546 * option to change stacks to query you even if the 547 * connection is in a later stage. You return 0 to 548 * say you can take over and run your stack, you return 549 * non-zero (an error number) to say no you can't. 550 * If the function is undefined you can only change 551 * in the early states (before connect or listen). 552 * 553 * tfb_tcp_fb_init is used to allow the new stack to 554 * setup its control block. Among the things it must 555 * do is: 556 * a) Make sure that the inp_flags2 is setup correctly 557 * for LRO. There are two flags that the previous 558 * stack may have set INP_MBUF_ACKCMP and 559 * INP_SUPPORTS_MBUFQ. If the new stack does not 560 * support these it *should* clear the flags. 561 * b) Make sure that the timers are in the proper 562 * granularity that the stack wants. The stack 563 * should check the t_tmr_granularity field. Currently 564 * there are two values that it may hold 565 * TCP_TMR_GRANULARITY_TICKS and TCP_TMR_GRANULARITY_USEC. 566 * Use the functions tcp_timer_convert(tp, granularity); 567 * to move the timers to the correct format for your stack. 568 * 569 * The new stack may also optionally query the tfb_chg_query 570 * function if the old stack has one. The new stack may ask 571 * for one of three entries and can also state to the old 572 * stack its support for the INP_MBUF_ACKCMP and 573 * INP_SUPPORTS_MBUFQ. This is important since if there are 574 * queued ack's without that statement the old stack will 575 * be forced to discard the queued acks. The requests that 576 * can be made for information by the new stacks are: 577 * 578 * Note also that the tfb_tcp_fb_init() when called can 579 * determine if a query is needed by looking at the 580 * value passed in the ptr. The ptr is designed to be 581 * set in with any allocated memory, but the address 582 * of the condtion (ptr == &tp->t_fb_ptr) will be 583 * true if this is not a stack switch but the initial 584 * setup of a tcb (which means no query would be needed). 585 * If, however, the value is not t_fb_ptr, then the caller 586 * is in the middle of a stack switch and is the new stack. 587 * A query would be appropriate (if the new stack support 588 * the query mechanism). 589 * 590 * TCP_QUERY_SENDMAP - Query of outstanding data. 591 * TCP_QUERY_TIMERS_UP - Query about running timers. 592 * TCP_SUPPORTED_LRO - Declaration in req_param of 593 * the inp_flags2 supported by 594 * the new stack. 595 * TCP_QUERY_RACK_TIMES - Enquire about various timestamps 596 * and states the old stack may be in. 597 * 598 * tfb_tcp_fb_fini is changed to add a flag to tell 599 * the old stack if the tcb is being destroyed or 600 * not. A one in the flag means the TCB is being 601 * destroyed, a zero indicates its transitioning to 602 * another stack (via socket option). The 603 * tfb_tcp_fb_fini() function itself should not change timers 604 * or inp_flags2 (the tfb_tcp_fb_init() must do that). However 605 * if the old stack supports the LRO mbuf queuing, and the new 606 * stack does not communicate via chg messages that it too does, 607 * it must assume it does not and free any queued mbufs. 608 * 609 */ 610struct tcp_function_block { 611 char tfb_tcp_block_name[TCP_FUNCTION_NAME_LEN_MAX]; 612 int (*tfb_tcp_output)(struct tcpcb *); 613 void (*tfb_tcp_do_segment)(struct tcpcb *, struct mbuf *, 614 struct tcphdr *, int, int, uint8_t); 615 int (*tfb_do_segment_nounlock)(struct tcpcb *, struct mbuf *, 616 struct tcphdr *, int, int, uint8_t, int, struct timeval *); 617 int (*tfb_do_queued_segments)(struct tcpcb *, int); 618 int (*tfb_tcp_ctloutput)(struct tcpcb *, struct sockopt *); 619 /* Optional memory allocation/free routine */ 620 int (*tfb_tcp_fb_init)(struct tcpcb *, void **); 621 void (*tfb_tcp_fb_fini)(struct tcpcb *, int); 622 /* Optional timers, must define all if you define one */ 623 int (*tfb_tcp_timer_stop_all)(struct tcpcb *); 624 void (*tfb_tcp_rexmit_tmr)(struct tcpcb *); 625 int (*tfb_tcp_handoff_ok)(struct tcpcb *); 626 void (*tfb_tcp_mtu_chg)(struct tcpcb *tp); 627 int (*tfb_pru_options)(struct tcpcb *, int); 628 void (*tfb_hwtls_change)(struct tcpcb *, int); 629 int (*tfb_chg_query)(struct tcpcb *, struct tcp_query_resp *); 630 void (*tfb_switch_failed)(struct tcpcb *); 631 bool (*tfb_early_wake_check)(struct tcpcb *); 632 int (*tfb_compute_pipe)(struct tcpcb *tp); 633 int (*tfb_stack_info)(struct tcpcb *tp, struct stack_specific_info *); 634 void (*tfb_inherit)(struct tcpcb *tp, struct inpcb *h_inp); 635 volatile uint32_t tfb_refcnt; 636 uint32_t tfb_flags; 637 uint8_t tfb_id; 638}; 639 640struct tcp_function { 641 TAILQ_ENTRY(tcp_function) tf_next; 642 char tf_name[TCP_FUNCTION_NAME_LEN_MAX]; 643 struct tcp_function_block *tf_fb; 644}; 645 646TAILQ_HEAD(tcp_funchead, tcp_function); 647 648struct tcpcb * tcp_drop(struct tcpcb *, int); 649 650#ifdef _NETINET_IN_PCB_H_ 651#define intotcpcb(inp) __containerof((inp), struct tcpcb, t_inpcb) 652#define sototcpcb(so) intotcpcb(sotoinpcb(so)) 653#define tptoinpcb(tp) (&(tp)->t_inpcb) 654#define tptosocket(tp) (tp)->t_inpcb.inp_socket 655 656/* 657 * tcp_output() 658 * Handles tcp_drop request from advanced stacks and reports that inpcb is 659 * gone with negative return code. 660 * Drop in replacement for the default stack. 661 */ 662static inline int 663tcp_output(struct tcpcb *tp) 664{ 665 struct inpcb *inp = tptoinpcb(tp); 666 int rv; 667 668 INP_WLOCK_ASSERT(inp); 669 670 rv = tp->t_fb->tfb_tcp_output(tp); 671 if (rv < 0) { 672 KASSERT(tp->t_fb->tfb_flags & TCP_FUNC_OUTPUT_CANDROP, 673 ("TCP stack %s requested tcp_drop(%p)", 674 tp->t_fb->tfb_tcp_block_name, tp)); 675 tp = tcp_drop(tp, -rv); 676 if (tp) 677 INP_WUNLOCK(inp); 678 } 679 680 return (rv); 681} 682 683/* 684 * tcp_output_unlock() 685 * Always returns unlocked, handles drop request from advanced stacks. 686 * Always returns positive error code. 687 */ 688static inline int 689tcp_output_unlock(struct tcpcb *tp) 690{ 691 struct inpcb *inp = tptoinpcb(tp); 692 int rv; 693 694 INP_WLOCK_ASSERT(inp); 695 696 rv = tp->t_fb->tfb_tcp_output(tp); 697 if (rv < 0) { 698 KASSERT(tp->t_fb->tfb_flags & TCP_FUNC_OUTPUT_CANDROP, 699 ("TCP stack %s requested tcp_drop(%p)", 700 tp->t_fb->tfb_tcp_block_name, tp)); 701 rv = -rv; 702 tp = tcp_drop(tp, rv); 703 if (tp) 704 INP_WUNLOCK(inp); 705 } else 706 INP_WUNLOCK(inp); 707 708 return (rv); 709} 710 711/* 712 * tcp_output_nodrop() 713 * Always returns locked. It is caller's responsibility to run tcp_drop()! 714 * Useful in syscall implementations, when we want to perform some logging 715 * and/or tracing with tcpcb before calling tcp_drop(). To be used with 716 * tcp_unlock_or_drop() later. 717 * 718 * XXXGL: maybe don't allow stacks to return a drop request at certain 719 * TCP states? Why would it do in connect(2)? In recv(2)? 720 */ 721static inline int 722tcp_output_nodrop(struct tcpcb *tp) 723{ 724 int rv; 725 726 INP_WLOCK_ASSERT(tptoinpcb(tp)); 727 728 rv = tp->t_fb->tfb_tcp_output(tp); 729 KASSERT(rv >= 0 || tp->t_fb->tfb_flags & TCP_FUNC_OUTPUT_CANDROP, 730 ("TCP stack %s requested tcp_drop(%p)", 731 tp->t_fb->tfb_tcp_block_name, tp)); 732 return (rv); 733} 734 735/* 736 * tcp_unlock_or_drop() 737 * Handle return code from tfb_tcp_output() after we have logged/traced, 738 * to be used with tcp_output_nodrop(). 739 */ 740static inline int 741tcp_unlock_or_drop(struct tcpcb *tp, int tcp_output_retval) 742{ 743 struct inpcb *inp = tptoinpcb(tp); 744 745 INP_WLOCK_ASSERT(inp); 746 747 if (tcp_output_retval < 0) { 748 tcp_output_retval = -tcp_output_retval; 749 if (tcp_drop(tp, tcp_output_retval) != NULL) 750 INP_WUNLOCK(inp); 751 } else 752 INP_WUNLOCK(inp); 753 754 return (tcp_output_retval); 755} 756#endif /* _NETINET_IN_PCB_H_ */ 757 758static int inline 759tcp_packets_this_ack(struct tcpcb *tp, tcp_seq ack) 760{ 761 return ((ack - tp->snd_una) / tp->t_maxseg + 762 ((((ack - tp->snd_una) % tp->t_maxseg) != 0) ? 1 : 0)); 763} 764#endif /* _KERNEL */ 765 766/* 767 * Flags and utility macros for the t_flags field. 768 */ 769#define TF_ACKNOW 0x00000001 /* ack peer immediately */ 770#define TF_DELACK 0x00000002 /* ack, but try to delay it */ 771#define TF_NODELAY 0x00000004 /* don't delay packets to coalesce */ 772#define TF_NOOPT 0x00000008 /* don't use tcp options */ 773#define TF_SENTFIN 0x00000010 /* have sent FIN */ 774#define TF_REQ_SCALE 0x00000020 /* have/will request window scaling */ 775#define TF_RCVD_SCALE 0x00000040 /* other side has requested scaling */ 776#define TF_REQ_TSTMP 0x00000080 /* have/will request timestamps */ 777#define TF_RCVD_TSTMP 0x00000100 /* a timestamp was received in SYN */ 778#define TF_SACK_PERMIT 0x00000200 /* other side said I could SACK */ 779#define TF_NEEDSYN 0x00000400 /* send SYN (implicit state) */ 780#define TF_NEEDFIN 0x00000800 /* send FIN (implicit state) */ 781#define TF_NOPUSH 0x00001000 /* don't push */ 782#define TF_PREVVALID 0x00002000 /* saved values for bad rxmit valid 783 * Note: accessing and restoring from 784 * these may only be done in the 1st 785 * RTO recovery round (t_rxtshift == 1) 786 */ 787#define TF_WAKESOR 0x00004000 /* wake up receive socket */ 788#define TF_GPUTINPROG 0x00008000 /* Goodput measurement in progress */ 789#define TF_MORETOCOME 0x00010000 /* More data to be appended to sock */ 790#define TF_SONOTCONN 0x00020000 /* needs soisconnected() on ESTAB */ 791#define TF_LASTIDLE 0x00040000 /* connection was previously idle */ 792#define TF_RXWIN0SENT 0x00080000 /* sent a receiver win 0 in response */ 793#define TF_FASTRECOVERY 0x00100000 /* in NewReno Fast Recovery */ 794#define TF_WASFRECOVERY 0x00200000 /* was in NewReno Fast Recovery */ 795#define TF_SIGNATURE 0x00400000 /* require MD5 digests (RFC2385) */ 796#define TF_FORCEDATA 0x00800000 /* force out a byte */ 797#define TF_TSO 0x01000000 /* TSO enabled on this connection */ 798#define TF_TOE 0x02000000 /* this connection is offloaded */ 799#define TF_CLOSED 0x04000000 /* close(2) called on socket */ 800#define TF_SENTSYN 0x08000000 /* At least one syn has been sent */ 801#define TF_LRD 0x10000000 /* Lost Retransmission Detection */ 802#define TF_CONGRECOVERY 0x20000000 /* congestion recovery mode */ 803#define TF_WASCRECOVERY 0x40000000 /* was in congestion recovery */ 804#define TF_FASTOPEN 0x80000000 /* TCP Fast Open indication */ 805 806#define IN_FASTRECOVERY(t_flags) (t_flags & TF_FASTRECOVERY) 807#define ENTER_FASTRECOVERY(t_flags) t_flags |= TF_FASTRECOVERY 808#define EXIT_FASTRECOVERY(t_flags) t_flags &= ~TF_FASTRECOVERY 809 810#define IN_CONGRECOVERY(t_flags) (t_flags & TF_CONGRECOVERY) 811#define ENTER_CONGRECOVERY(t_flags) t_flags |= TF_CONGRECOVERY 812#define EXIT_CONGRECOVERY(t_flags) t_flags &= ~TF_CONGRECOVERY 813 814#define IN_RECOVERY(t_flags) (t_flags & (TF_CONGRECOVERY | TF_FASTRECOVERY)) 815#define ENTER_RECOVERY(t_flags) t_flags |= (TF_CONGRECOVERY | TF_FASTRECOVERY) 816#define EXIT_RECOVERY(t_flags) t_flags &= ~(TF_CONGRECOVERY | TF_FASTRECOVERY) 817 818#define BYTES_THIS_ACK(tp, th) (th->th_ack - tp->snd_una) 819 820/* 821 * Flags for the t_oobflags field. 822 */ 823#define TCPOOB_HAVEDATA 0x01 824#define TCPOOB_HADDATA 0x02 825 826/* 827 * Flags for the extended TCP flags field, t_flags2 828 */ 829#define TF2_PLPMTU_BLACKHOLE 0x00000001 /* Possible PLPMTUD Black Hole. */ 830#define TF2_PLPMTU_PMTUD 0x00000002 /* Allowed to attempt PLPMTUD. */ 831#define TF2_PLPMTU_MAXSEGSNT 0x00000004 /* Last seg sent was full seg. */ 832#define TF2_LOG_AUTO 0x00000008 /* Session is auto-logging. */ 833#define TF2_DROP_AF_DATA 0x00000010 /* Drop after all data ack'd */ 834#define TF2_ECN_PERMIT 0x00000020 /* connection ECN-ready */ 835#define TF2_ECN_SND_CWR 0x00000040 /* ECN CWR in queue */ 836#define TF2_ECN_SND_ECE 0x00000080 /* ECN ECE in queue */ 837#define TF2_ACE_PERMIT 0x00000100 /* Accurate ECN mode */ 838#define TF2_HPTS_CPU_SET 0x00000200 /* t_hpts_cpu is not random */ 839#define TF2_FBYTES_COMPLETE 0x00000400 /* We have first bytes in and out */ 840#define TF2_ECN_USE_ECT1 0x00000800 /* Use ECT(1) marking on session */ 841#define TF2_TCP_ACCOUNTING 0x00001000 /* Do TCP accounting */ 842#define TF2_HPTS_CALLS 0x00002000 /* tcp_output() called via HPTS */ 843#define TF2_MBUF_L_ACKS 0x00004000 /* large mbufs for ack compression */ 844#define TF2_MBUF_ACKCMP 0x00008000 /* mbuf ack compression ok */ 845#define TF2_SUPPORTS_MBUFQ 0x00010000 /* Supports the mbuf queue method */ 846#define TF2_MBUF_QUEUE_READY 0x00020000 /* Inputs can be queued */ 847#define TF2_DONT_SACK_QUEUE 0x00040000 /* Don't wake on sack */ 848#define TF2_CANNOT_DO_ECN 0x00080000 /* The stack does not do ECN */ 849#define TF2_PROC_SACK_PROHIBIT 0x00100000 /* Due to small MSS size do not process sack's */ 850 851/* 852 * Structure to hold TCP options that are only used during segment 853 * processing (in tcp_input), but not held in the tcpcb. 854 * It's basically used to reduce the number of parameters 855 * to tcp_dooptions and tcp_addoptions. 856 * The binary order of the to_flags is relevant for packing of the 857 * options in tcp_addoptions. 858 */ 859struct tcpopt { 860 u_int32_t to_flags; /* which options are present */ 861#define TOF_MSS 0x0001 /* maximum segment size */ 862#define TOF_SCALE 0x0002 /* window scaling */ 863#define TOF_SACKPERM 0x0004 /* SACK permitted */ 864#define TOF_TS 0x0010 /* timestamp */ 865#define TOF_SIGNATURE 0x0040 /* TCP-MD5 signature option (RFC2385) */ 866#define TOF_SACK 0x0080 /* Peer sent SACK option */ 867#define TOF_FASTOPEN 0x0100 /* TCP Fast Open (TFO) cookie */ 868#define TOF_MAXOPT 0x0200 869 u_int32_t to_tsval; /* new timestamp */ 870 u_int32_t to_tsecr; /* reflected timestamp */ 871 u_char *to_sacks; /* pointer to the first SACK blocks */ 872 u_char *to_signature; /* pointer to the TCP-MD5 signature */ 873 u_int8_t *to_tfo_cookie; /* pointer to the TFO cookie */ 874 u_int16_t to_mss; /* maximum segment size */ 875 u_int8_t to_wscale; /* window scaling */ 876 u_int8_t to_nsacks; /* number of SACK blocks */ 877 u_int8_t to_tfo_len; /* TFO cookie length */ 878 u_int32_t to_spare; /* UTO */ 879}; 880 881/* 882 * Flags for tcp_dooptions. 883 */ 884#define TO_SYN 0x01 /* parse SYN-only options */ 885 886struct hc_metrics_lite { /* must stay in sync with hc_metrics */ 887 uint32_t rmx_mtu; /* MTU for this path */ 888 uint32_t rmx_ssthresh; /* outbound gateway buffer limit */ 889 uint32_t rmx_rtt; /* estimated round trip time */ 890 uint32_t rmx_rttvar; /* estimated rtt variance */ 891 uint32_t rmx_cwnd; /* congestion window */ 892 uint32_t rmx_sendpipe; /* outbound delay-bandwidth product */ 893 uint32_t rmx_recvpipe; /* inbound delay-bandwidth product */ 894}; 895 896#ifndef _NETINET_IN_PCB_H_ 897struct in_conninfo; 898#endif /* _NETINET_IN_PCB_H_ */ 899 900/* 901 * The smoothed round-trip time and estimated variance 902 * are stored as fixed point numbers scaled by the values below. 903 * For convenience, these scales are also used in smoothing the average 904 * (smoothed = (1/scale)sample + ((scale-1)/scale)smoothed). 905 * With these scales, srtt has 3 bits to the right of the binary point, 906 * and thus an "ALPHA" of 0.875. rttvar has 2 bits to the right of the 907 * binary point, and is smoothed with an ALPHA of 0.75. 908 */ 909#define TCP_RTT_SCALE 32 /* multiplier for srtt; 5 bits frac. */ 910#define TCP_RTT_SHIFT 5 /* shift for srtt; 5 bits frac. */ 911#define TCP_RTTVAR_SCALE 16 /* multiplier for rttvar; 4 bits */ 912#define TCP_RTTVAR_SHIFT 4 /* shift for rttvar; 4 bits */ 913#define TCP_DELTA_SHIFT 2 /* see tcp_input.c */ 914 915/* 916 * The initial retransmission should happen at rtt + 4 * rttvar. 917 * Because of the way we do the smoothing, srtt and rttvar 918 * will each average +1/2 tick of bias. When we compute 919 * the retransmit timer, we want 1/2 tick of rounding and 920 * 1 extra tick because of +-1/2 tick uncertainty in the 921 * firing of the timer. The bias will give us exactly the 922 * 1.5 tick we need. But, because the bias is 923 * statistical, we have to test that we don't drop below 924 * the minimum feasible timer (which is 2 ticks). 925 * This version of the macro adapted from a paper by Lawrence 926 * Brakmo and Larry Peterson which outlines a problem caused 927 * by insufficient precision in the original implementation, 928 * which results in inappropriately large RTO values for very 929 * fast networks. 930 */ 931#define TCP_REXMTVAL(tp) \ 932 max((tp)->t_rttmin, (((tp)->t_srtt >> (TCP_RTT_SHIFT - TCP_DELTA_SHIFT)) \ 933 + (tp)->t_rttvar) >> TCP_DELTA_SHIFT) 934 935/* 936 * TCP statistics. 937 * Many of these should be kept per connection, 938 * but that's inconvenient at the moment. 939 */ 940struct tcpstat { 941 uint64_t tcps_connattempt; /* connections initiated */ 942 uint64_t tcps_accepts; /* connections accepted */ 943 uint64_t tcps_connects; /* connections established */ 944 uint64_t tcps_drops; /* connections dropped */ 945 uint64_t tcps_conndrops; /* embryonic connections dropped */ 946 uint64_t tcps_minmssdrops; /* average minmss too low drops */ 947 uint64_t tcps_closed; /* conn. closed (includes drops) */ 948 uint64_t tcps_segstimed; /* segs where we tried to get rtt */ 949 uint64_t tcps_rttupdated; /* times we succeeded */ 950 uint64_t tcps_delack; /* delayed acks sent */ 951 uint64_t tcps_timeoutdrop; /* conn. dropped in rxmt timeout */ 952 uint64_t tcps_rexmttimeo; /* retransmit timeouts */ 953 uint64_t tcps_persisttimeo; /* persist timeouts */ 954 uint64_t tcps_keeptimeo; /* keepalive timeouts */ 955 uint64_t tcps_keepprobe; /* keepalive probes sent */ 956 uint64_t tcps_keepdrops; /* connections dropped in keepalive */ 957 uint64_t tcps_progdrops; /* drops due to no progress */ 958 959 uint64_t tcps_sndtotal; /* total packets sent */ 960 uint64_t tcps_sndpack; /* data packets sent */ 961 uint64_t tcps_sndbyte; /* data bytes sent */ 962 uint64_t tcps_sndrexmitpack; /* data packets retransmitted */ 963 uint64_t tcps_sndrexmitbyte; /* data bytes retransmitted */ 964 uint64_t tcps_sndrexmitbad; /* unnecessary packet retransmissions */ 965 uint64_t tcps_sndacks; /* ack-only packets sent */ 966 uint64_t tcps_sndprobe; /* window probes sent */ 967 uint64_t tcps_sndurg; /* packets sent with URG only */ 968 uint64_t tcps_sndwinup; /* window update-only packets sent */ 969 uint64_t tcps_sndctrl; /* control (SYN|FIN|RST) packets sent */ 970 971 uint64_t tcps_rcvtotal; /* total packets received */ 972 uint64_t tcps_rcvpack; /* packets received in sequence */ 973 uint64_t tcps_rcvbyte; /* bytes received in sequence */ 974 uint64_t tcps_rcvbadsum; /* packets received with ccksum errs */ 975 uint64_t tcps_rcvbadoff; /* packets received with bad offset */ 976 uint64_t tcps_rcvreassfull; /* packets dropped for no reass space */ 977 uint64_t tcps_rcvshort; /* packets received too short */ 978 uint64_t tcps_rcvduppack; /* duplicate-only packets received */ 979 uint64_t tcps_rcvdupbyte; /* duplicate-only bytes received */ 980 uint64_t tcps_rcvpartduppack; /* packets with some duplicate data */ 981 uint64_t tcps_rcvpartdupbyte; /* dup. bytes in part-dup. packets */ 982 uint64_t tcps_rcvoopack; /* out-of-order packets received */ 983 uint64_t tcps_rcvoobyte; /* out-of-order bytes received */ 984 uint64_t tcps_rcvpackafterwin; /* packets with data after window */ 985 uint64_t tcps_rcvbyteafterwin; /* bytes rcvd after window */ 986 uint64_t tcps_rcvafterclose; /* packets rcvd after "close" */ 987 uint64_t tcps_rcvwinprobe; /* rcvd window probe packets */ 988 uint64_t tcps_rcvdupack; /* rcvd duplicate acks */ 989 uint64_t tcps_rcvacktoomuch; /* rcvd acks for unsent data */ 990 uint64_t tcps_rcvackpack; /* rcvd ack packets */ 991 uint64_t tcps_rcvackbyte; /* bytes acked by rcvd acks */ 992 uint64_t tcps_rcvwinupd; /* rcvd window update packets */ 993 uint64_t tcps_pawsdrop; /* segments dropped due to PAWS */ 994 uint64_t tcps_predack; /* times hdr predict ok for acks */ 995 uint64_t tcps_preddat; /* times hdr predict ok for data pkts */ 996 uint64_t tcps_pcbcachemiss; 997 uint64_t tcps_cachedrtt; /* times cached RTT in route updated */ 998 uint64_t tcps_cachedrttvar; /* times cached rttvar updated */ 999 uint64_t tcps_cachedssthresh; /* times cached ssthresh updated */ 1000 uint64_t tcps_usedrtt; /* times RTT initialized from route */ 1001 uint64_t tcps_usedrttvar; /* times RTTVAR initialized from rt */ 1002 uint64_t tcps_usedssthresh; /* times ssthresh initialized from rt*/ 1003 uint64_t tcps_persistdrop; /* timeout in persist state */ 1004 uint64_t tcps_badsyn; /* bogus SYN, e.g. premature ACK */ 1005 uint64_t tcps_mturesent; /* resends due to MTU discovery */ 1006 uint64_t tcps_listendrop; /* listen queue overflows */ 1007 uint64_t tcps_badrst; /* ignored RSTs in the window */ 1008 1009 uint64_t tcps_sc_added; /* entry added to syncache */ 1010 uint64_t tcps_sc_retransmitted; /* syncache entry was retransmitted */ 1011 uint64_t tcps_sc_dupsyn; /* duplicate SYN packet */ 1012 uint64_t tcps_sc_dropped; /* could not reply to packet */ 1013 uint64_t tcps_sc_completed; /* successful extraction of entry */ 1014 uint64_t tcps_sc_bucketoverflow;/* syncache per-bucket limit hit */ 1015 uint64_t tcps_sc_cacheoverflow; /* syncache cache limit hit */ 1016 uint64_t tcps_sc_reset; /* RST removed entry from syncache */ 1017 uint64_t tcps_sc_stale; /* timed out or listen socket gone */ 1018 uint64_t tcps_sc_aborted; /* syncache entry aborted */ 1019 uint64_t tcps_sc_badack; /* removed due to bad ACK */ 1020 uint64_t tcps_sc_unreach; /* ICMP unreachable received */ 1021 uint64_t tcps_sc_zonefail; /* zalloc() failed */ 1022 uint64_t tcps_sc_sendcookie; /* SYN cookie sent */ 1023 uint64_t tcps_sc_recvcookie; /* SYN cookie received */ 1024 1025 uint64_t tcps_hc_added; /* entry added to hostcache */ 1026 uint64_t tcps_hc_bucketoverflow;/* hostcache per bucket limit hit */ 1027 1028 uint64_t tcps_finwait2_drops; /* Drop FIN_WAIT_2 connection after time limit */ 1029 1030 /* SACK related stats */ 1031 uint64_t tcps_sack_recovery_episode; /* SACK recovery episodes */ 1032 uint64_t tcps_sack_rexmits; /* SACK rexmit segments */ 1033 uint64_t tcps_sack_rexmits_tso; /* SACK rexmit TSO chunks */ 1034 uint64_t tcps_sack_rexmit_bytes; /* SACK rexmit bytes */ 1035 uint64_t tcps_sack_rcv_blocks; /* SACK blocks (options) received */ 1036 uint64_t tcps_sack_send_blocks; /* SACK blocks (options) sent */ 1037 uint64_t tcps_sack_lostrexmt; /* SACK lost retransmission recovered */ 1038 uint64_t tcps_sack_sboverflow; /* times scoreboard overflowed */ 1039 1040 /* ECN related stats */ 1041 uint64_t tcps_ecn_rcvce; /* ECN Congestion Experienced */ 1042 uint64_t tcps_ecn_rcvect0; /* ECN Capable Transport */ 1043 uint64_t tcps_ecn_rcvect1; /* ECN Capable Transport */ 1044 uint64_t tcps_ecn_shs; /* ECN successful handshakes */ 1045 uint64_t tcps_ecn_rcwnd; /* # times ECN reduced the cwnd */ 1046 1047 /* TCP_SIGNATURE related stats */ 1048 uint64_t tcps_sig_rcvgoodsig; /* Total matching signature received */ 1049 uint64_t tcps_sig_rcvbadsig; /* Total bad signature received */ 1050 uint64_t tcps_sig_err_buildsig; /* Failed to make signature */ 1051 uint64_t tcps_sig_err_sigopt; /* No signature expected by socket */ 1052 uint64_t tcps_sig_err_nosigopt; /* No signature provided by segment */ 1053 1054 /* Path MTU Discovery Black Hole Detection related stats */ 1055 uint64_t tcps_pmtud_blackhole_activated; /* Black Hole Count */ 1056 uint64_t tcps_pmtud_blackhole_activated_min_mss; /* BH at min MSS Count */ 1057 uint64_t tcps_pmtud_blackhole_failed; /* Black Hole Failure Count */ 1058 1059 uint64_t tcps_tunneled_pkts; /* Packets encap's in UDP received */ 1060 uint64_t tcps_tunneled_errs; /* Packets that had errors that were UDP encaped */ 1061 1062 /* Dsack related stats */ 1063 uint64_t tcps_dsack_count; /* Number of ACKs arriving with DSACKs */ 1064 uint64_t tcps_dsack_bytes; /* Number of bytes DSACK'ed no TLP */ 1065 uint64_t tcps_dsack_tlp_bytes; /* Number of bytes DSACK'ed due to TLPs */ 1066 1067 /* TCPS_TIME_WAIT usage stats */ 1068 uint64_t tcps_tw_recycles; /* Times time-wait was recycled. */ 1069 uint64_t tcps_tw_resets; /* Times time-wait sent a reset. */ 1070 uint64_t tcps_tw_responds; /* Times time-wait sent a valid ack. */ 1071 1072 /* Accurate ECN Handshake stats */ 1073 uint64_t tcps_ace_nect; /* ACE SYN packet with Non-ECT */ 1074 uint64_t tcps_ace_ect1; /* ACE SYN packet with ECT1 */ 1075 uint64_t tcps_ace_ect0; /* ACE SYN packet with ECT0 */ 1076 uint64_t tcps_ace_ce; /* ACE SYN packet with CE */ 1077 1078 /* ECN related stats */ 1079 uint64_t tcps_ecn_sndect0; /* ECN Capable Transport */ 1080 uint64_t tcps_ecn_sndect1; /* ECN Capable Transport */ 1081 1082 /* 1083 * BBR and Rack implement TLP's these values count TLP bytes in 1084 * two catagories, bytes that were retransmitted and bytes that 1085 * were newly transmited. Both types can serve as TLP's but they 1086 * are accounted differently. 1087 */ 1088 uint64_t tcps_tlpresends; /* number of tlp resends */ 1089 uint64_t tcps_tlpresend_bytes; /* number of bytes resent by tlp */ 1090 1091 1092 uint64_t _pad[3]; /* 3 TBD placeholder for STABLE */ 1093}; 1094 1095#define tcps_rcvmemdrop tcps_rcvreassfull /* compat */ 1096 1097#ifdef _KERNEL 1098#define TI_UNLOCKED 1 1099#define TI_RLOCKED 2 1100#include <sys/counter.h> 1101#include <netinet/in_kdtrace.h> 1102 1103VNET_PCPUSTAT_DECLARE(struct tcpstat, tcpstat); /* tcp statistics */ 1104/* 1105 * In-kernel consumers can use these accessor macros directly to update 1106 * stats. 1107 */ 1108#define TCPSTAT_ADD(name, val) \ 1109 do { \ 1110 MIB_SDT_PROBE1(tcp, count, name, (val)); \ 1111 VNET_PCPUSTAT_ADD(struct tcpstat, tcpstat, name, (val)); \ 1112 } while (0) 1113#define TCPSTAT_INC(name) TCPSTAT_ADD(name, 1) 1114 1115/* 1116 * Kernel module consumers must use this accessor macro. 1117 */ 1118void kmod_tcpstat_add(int statnum, int val); 1119#define KMOD_TCPSTAT_ADD(name, val) \ 1120 do { \ 1121 MIB_SDT_PROBE1(tcp, count, name, (val)); \ 1122 kmod_tcpstat_add(offsetof(struct tcpstat, name) / \ 1123 sizeof(uint64_t), \ 1124 val); \ 1125 } while (0) 1126#define KMOD_TCPSTAT_INC(name) KMOD_TCPSTAT_ADD(name, 1) 1127 1128/* 1129 * Running TCP connection count by state. 1130 */ 1131VNET_DECLARE(counter_u64_t, tcps_states[TCP_NSTATES]); 1132#define V_tcps_states VNET(tcps_states) 1133#define TCPSTATES_INC(state) counter_u64_add(V_tcps_states[state], 1) 1134#define TCPSTATES_DEC(state) counter_u64_add(V_tcps_states[state], -1) 1135 1136/* 1137 * TCP specific helper hook point identifiers. 1138 */ 1139#define HHOOK_TCP_EST_IN 0 1140#define HHOOK_TCP_EST_OUT 1 1141#define HHOOK_TCP_LAST HHOOK_TCP_EST_OUT 1142 1143struct tcp_hhook_data { 1144 struct tcpcb *tp; 1145 struct tcphdr *th; 1146 struct tcpopt *to; 1147 uint32_t len; 1148 int tso; 1149 tcp_seq curack; 1150}; 1151#ifdef TCP_HHOOK 1152void hhook_run_tcp_est_out(struct tcpcb *tp, 1153 struct tcphdr *th, struct tcpopt *to, 1154 uint32_t len, int tso); 1155#endif 1156#endif 1157 1158/* 1159 * TCB structure exported to user-land via sysctl(3). 1160 * 1161 * Fields prefixed with "xt_" are unique to the export structure, and fields 1162 * with "t_" or other prefixes match corresponding fields of 'struct tcpcb'. 1163 * 1164 * Legend: 1165 * (s) - used by userland utilities in src 1166 * (p) - used by utilities in ports 1167 * (3) - is known to be used by third party software not in ports 1168 * (n) - no known usage 1169 * 1170 * Evil hack: declare only if in_pcb.h and sys/socketvar.h have been 1171 * included. Not all of our clients do. 1172 */ 1173#if defined(_NETINET_IN_PCB_H_) && defined(_SYS_SOCKETVAR_H_) 1174struct xtcpcb { 1175 ksize_t xt_len; /* length of this structure */ 1176 struct xinpcb xt_inp; 1177 char xt_stack[TCP_FUNCTION_NAME_LEN_MAX]; /* (s) */ 1178 char xt_logid[TCP_LOG_ID_LEN]; /* (s) */ 1179 char xt_cc[TCP_CA_NAME_MAX]; /* (s) */ 1180 int64_t spare64[6]; 1181 int32_t t_state; /* (s,p) */ 1182 uint32_t t_flags; /* (s,p) */ 1183 int32_t t_sndzerowin; /* (s) */ 1184 int32_t t_sndrexmitpack; /* (s) */ 1185 int32_t t_rcvoopack; /* (s) */ 1186 int32_t t_rcvtime; /* (s) */ 1187 int32_t tt_rexmt; /* (s) */ 1188 int32_t tt_persist; /* (s) */ 1189 int32_t tt_keep; /* (s) */ 1190 int32_t tt_2msl; /* (s) */ 1191 int32_t tt_delack; /* (s) */ 1192 int32_t t_logstate; /* (3) */ 1193 uint32_t t_snd_cwnd; /* (s) */ 1194 uint32_t t_snd_ssthresh; /* (s) */ 1195 uint32_t t_maxseg; /* (s) */ 1196 uint32_t t_rcv_wnd; /* (s) */ 1197 uint32_t t_snd_wnd; /* (s) */ 1198 uint32_t xt_ecn; /* (s) */ 1199 uint32_t t_dsack_bytes; /* (n) */ 1200 uint32_t t_dsack_tlp_bytes; /* (n) */ 1201 uint32_t t_dsack_pack; /* (n) */ 1202 uint16_t xt_encaps_port; /* (s) */ 1203 int16_t spare16; 1204 int32_t spare32[22]; 1205} __aligned(8); 1206 1207#ifdef _KERNEL 1208void tcp_inptoxtp(const struct inpcb *, struct xtcpcb *); 1209#endif 1210#endif 1211 1212/* 1213 * TCP function information (name-to-id mapping, aliases, and refcnt) 1214 * exported to user-land via sysctl(3). 1215 */ 1216struct tcp_function_info { 1217 uint32_t tfi_refcnt; 1218 uint8_t tfi_id; 1219 char tfi_name[TCP_FUNCTION_NAME_LEN_MAX]; 1220 char tfi_alias[TCP_FUNCTION_NAME_LEN_MAX]; 1221}; 1222 1223/* 1224 * Identifiers for TCP sysctl nodes 1225 */ 1226#define TCPCTL_DO_RFC1323 1 /* use RFC-1323 extensions */ 1227#define TCPCTL_MSSDFLT 3 /* MSS default */ 1228#define TCPCTL_STATS 4 /* statistics */ 1229#define TCPCTL_RTTDFLT 5 /* default RTT estimate */ 1230#define TCPCTL_KEEPIDLE 6 /* keepalive idle timer */ 1231#define TCPCTL_KEEPINTVL 7 /* interval to send keepalives */ 1232#define TCPCTL_SENDSPACE 8 /* send buffer space */ 1233#define TCPCTL_RECVSPACE 9 /* receive buffer space */ 1234#define TCPCTL_KEEPINIT 10 /* timeout for establishing syn */ 1235#define TCPCTL_PCBLIST 11 /* list of all outstanding PCBs */ 1236#define TCPCTL_DELACKTIME 12 /* time before sending delayed ACK */ 1237#define TCPCTL_V6MSSDFLT 13 /* MSS default for IPv6 */ 1238#define TCPCTL_SACK 14 /* Selective Acknowledgement,rfc 2018 */ 1239#define TCPCTL_DROP 15 /* drop tcp connection */ 1240#define TCPCTL_STATES 16 /* connection counts by TCP state */ 1241 1242#ifdef _KERNEL 1243#ifdef SYSCTL_DECL 1244SYSCTL_DECL(_net_inet_tcp); 1245SYSCTL_DECL(_net_inet_tcp_sack); 1246MALLOC_DECLARE(M_TCPLOG); 1247#endif 1248 1249VNET_DECLARE(int, tcp_log_in_vain); 1250#define V_tcp_log_in_vain VNET(tcp_log_in_vain) 1251 1252/* 1253 * Global TCP tunables shared between different stacks. 1254 * Please keep the list sorted. 1255 */ 1256VNET_DECLARE(int, drop_synfin); 1257VNET_DECLARE(int, path_mtu_discovery); 1258VNET_DECLARE(int, tcp_abc_l_var); 1259VNET_DECLARE(int, tcp_autorcvbuf_max); 1260VNET_DECLARE(int, tcp_autosndbuf_inc); 1261VNET_DECLARE(int, tcp_autosndbuf_max); 1262VNET_DECLARE(int, tcp_delack_enabled); 1263VNET_DECLARE(int, tcp_do_autorcvbuf); 1264VNET_DECLARE(int, tcp_do_autosndbuf); 1265VNET_DECLARE(int, tcp_do_ecn); 1266VNET_DECLARE(int, tcp_do_lrd); 1267VNET_DECLARE(int, tcp_do_prr); 1268VNET_DECLARE(int, tcp_do_prr_conservative); 1269VNET_DECLARE(int, tcp_do_newcwv); 1270VNET_DECLARE(int, tcp_do_rfc1323); 1271VNET_DECLARE(int, tcp_tolerate_missing_ts); 1272VNET_DECLARE(int, tcp_do_rfc3042); 1273VNET_DECLARE(int, tcp_do_rfc3390); 1274VNET_DECLARE(int, tcp_do_rfc3465); 1275VNET_DECLARE(int, tcp_do_newsack); 1276VNET_DECLARE(int, tcp_do_sack); 1277VNET_DECLARE(int, tcp_do_tso); 1278VNET_DECLARE(int, tcp_ecn_maxretries); 1279VNET_DECLARE(int, tcp_initcwnd_segments); 1280VNET_DECLARE(int, tcp_insecure_rst); 1281VNET_DECLARE(int, tcp_insecure_syn); 1282VNET_DECLARE(uint32_t, tcp_map_entries_limit); 1283VNET_DECLARE(uint32_t, tcp_map_split_limit); 1284VNET_DECLARE(int, tcp_minmss); 1285VNET_DECLARE(int, tcp_mssdflt); 1286#ifdef STATS 1287VNET_DECLARE(int, tcp_perconn_stats_dflt_tpl); 1288VNET_DECLARE(int, tcp_perconn_stats_enable); 1289#endif /* STATS */ 1290VNET_DECLARE(int, tcp_recvspace); 1291VNET_DECLARE(int, tcp_retries); 1292VNET_DECLARE(int, tcp_sack_globalholes); 1293VNET_DECLARE(int, tcp_sack_globalmaxholes); 1294VNET_DECLARE(int, tcp_sack_maxholes); 1295VNET_DECLARE(int, tcp_sack_tso); 1296VNET_DECLARE(int, tcp_sc_rst_sock_fail); 1297VNET_DECLARE(int, tcp_sendspace); 1298VNET_DECLARE(int, tcp_udp_tunneling_overhead); 1299VNET_DECLARE(int, tcp_udp_tunneling_port); 1300VNET_DECLARE(struct inpcbinfo, tcbinfo); 1301 1302#define V_tcp_do_lrd VNET(tcp_do_lrd) 1303#define V_tcp_do_prr VNET(tcp_do_prr) 1304#define V_tcp_do_newcwv VNET(tcp_do_newcwv) 1305#define V_drop_synfin VNET(drop_synfin) 1306#define V_path_mtu_discovery VNET(path_mtu_discovery) 1307#define V_tcbinfo VNET(tcbinfo) 1308#define V_tcp_abc_l_var VNET(tcp_abc_l_var) 1309#define V_tcp_autorcvbuf_max VNET(tcp_autorcvbuf_max) 1310#define V_tcp_autosndbuf_inc VNET(tcp_autosndbuf_inc) 1311#define V_tcp_autosndbuf_max VNET(tcp_autosndbuf_max) 1312#define V_tcp_delack_enabled VNET(tcp_delack_enabled) 1313#define V_tcp_do_autorcvbuf VNET(tcp_do_autorcvbuf) 1314#define V_tcp_do_autosndbuf VNET(tcp_do_autosndbuf) 1315#define V_tcp_do_ecn VNET(tcp_do_ecn) 1316#define V_tcp_do_rfc1323 VNET(tcp_do_rfc1323) 1317#define V_tcp_tolerate_missing_ts VNET(tcp_tolerate_missing_ts) 1318#define V_tcp_ts_offset_per_conn VNET(tcp_ts_offset_per_conn) 1319#define V_tcp_do_rfc3042 VNET(tcp_do_rfc3042) 1320#define V_tcp_do_rfc3390 VNET(tcp_do_rfc3390) 1321#define V_tcp_do_rfc3465 VNET(tcp_do_rfc3465) 1322#define V_tcp_do_newsack VNET(tcp_do_newsack) 1323#define V_tcp_do_sack VNET(tcp_do_sack) 1324#define V_tcp_do_tso VNET(tcp_do_tso) 1325#define V_tcp_ecn_maxretries VNET(tcp_ecn_maxretries) 1326#define V_tcp_initcwnd_segments VNET(tcp_initcwnd_segments) 1327#define V_tcp_insecure_rst VNET(tcp_insecure_rst) 1328#define V_tcp_insecure_syn VNET(tcp_insecure_syn) 1329#define V_tcp_map_entries_limit VNET(tcp_map_entries_limit) 1330#define V_tcp_map_split_limit VNET(tcp_map_split_limit) 1331#define V_tcp_minmss VNET(tcp_minmss) 1332#define V_tcp_mssdflt VNET(tcp_mssdflt) 1333#ifdef STATS 1334#define V_tcp_perconn_stats_dflt_tpl VNET(tcp_perconn_stats_dflt_tpl) 1335#define V_tcp_perconn_stats_enable VNET(tcp_perconn_stats_enable) 1336#endif /* STATS */ 1337#define V_tcp_recvspace VNET(tcp_recvspace) 1338#define V_tcp_retries VNET(tcp_retries) 1339#define V_tcp_sack_globalholes VNET(tcp_sack_globalholes) 1340#define V_tcp_sack_globalmaxholes VNET(tcp_sack_globalmaxholes) 1341#define V_tcp_sack_maxholes VNET(tcp_sack_maxholes) 1342#define V_tcp_sack_tso VNET(tcp_sack_tso) 1343#define V_tcp_sc_rst_sock_fail VNET(tcp_sc_rst_sock_fail) 1344#define V_tcp_sendspace VNET(tcp_sendspace) 1345#define V_tcp_udp_tunneling_overhead VNET(tcp_udp_tunneling_overhead) 1346#define V_tcp_udp_tunneling_port VNET(tcp_udp_tunneling_port) 1347 1348#ifdef TCP_HHOOK 1349VNET_DECLARE(struct hhook_head *, tcp_hhh[HHOOK_TCP_LAST + 1]); 1350#define V_tcp_hhh VNET(tcp_hhh) 1351#endif 1352 1353void tcp_account_for_send(struct tcpcb *, uint32_t, uint8_t, uint8_t, bool); 1354int tcp_addoptions(struct tcpopt *, u_char *); 1355struct tcpcb * 1356 tcp_close(struct tcpcb *); 1357void tcp_discardcb(struct tcpcb *); 1358void tcp_twstart(struct tcpcb *); 1359int tcp_ctloutput(struct socket *, struct sockopt *); 1360void tcp_fini(void *); 1361char *tcp_log_addrs(struct in_conninfo *, struct tcphdr *, const void *, 1362 const void *); 1363char *tcp_log_vain(struct in_conninfo *, struct tcphdr *, const void *, 1364 const void *); 1365int tcp_reass(struct tcpcb *, struct tcphdr *, tcp_seq *, int *, 1366 struct mbuf *); 1367void tcp_reass_global_init(void); 1368void tcp_reass_flush(struct tcpcb *); 1369void tcp_dooptions(struct tcpopt *, u_char *, int, int); 1370void tcp_dropwithreset(struct mbuf *, struct tcphdr *, 1371 struct tcpcb *, int, int); 1372void tcp_pulloutofband(struct socket *, 1373 struct tcphdr *, struct mbuf *, int); 1374void tcp_xmit_timer(struct tcpcb *, int); 1375void tcp_newreno_partial_ack(struct tcpcb *, struct tcphdr *); 1376void cc_ack_received(struct tcpcb *tp, struct tcphdr *th, 1377 uint16_t nsegs, uint16_t type); 1378void cc_conn_init(struct tcpcb *tp); 1379void cc_post_recovery(struct tcpcb *tp, struct tcphdr *th); 1380void cc_ecnpkt_handler(struct tcpcb *tp, struct tcphdr *th, uint8_t iptos); 1381void cc_ecnpkt_handler_flags(struct tcpcb *tp, uint16_t flags, uint8_t iptos); 1382void cc_cong_signal(struct tcpcb *tp, struct tcphdr *th, uint32_t type); 1383#ifdef TCP_HHOOK 1384void hhook_run_tcp_est_in(struct tcpcb *tp, 1385 struct tcphdr *th, struct tcpopt *to); 1386#endif 1387 1388int tcp_input(struct mbuf **, int *, int); 1389int tcp_autorcvbuf(struct mbuf *, struct tcphdr *, struct socket *, 1390 struct tcpcb *, int); 1391int tcp_input_with_port(struct mbuf **, int *, int, uint16_t); 1392void tcp_do_segment(struct tcpcb *, struct mbuf *, struct tcphdr *, int, 1393 int, uint8_t); 1394 1395int register_tcp_functions(struct tcp_function_block *blk, int wait); 1396int register_tcp_functions_as_names(struct tcp_function_block *blk, 1397 int wait, const char *names[], int *num_names); 1398int register_tcp_functions_as_name(struct tcp_function_block *blk, 1399 const char *name, int wait); 1400int deregister_tcp_functions(struct tcp_function_block *blk, bool quiesce, 1401 bool force); 1402struct tcp_function_block *find_and_ref_tcp_functions(struct tcp_function_set *fs); 1403int find_tcp_function_alias(struct tcp_function_block *blk, struct tcp_function_set *fs); 1404uint32_t tcp_get_srtt(struct tcpcb *tp, int granularity); 1405void tcp_switch_back_to_default(struct tcpcb *tp); 1406struct tcp_function_block * 1407find_and_ref_tcp_fb(struct tcp_function_block *fs); 1408int tcp_default_ctloutput(struct tcpcb *tp, struct sockopt *sopt); 1409int tcp_ctloutput_set(struct inpcb *inp, struct sockopt *sopt); 1410void tcp_log_socket_option(struct tcpcb *tp, uint32_t option_num, 1411 uint32_t option_val, int err); 1412 1413 1414extern counter_u64_t tcp_inp_lro_direct_queue; 1415extern counter_u64_t tcp_inp_lro_wokeup_queue; 1416extern counter_u64_t tcp_inp_lro_compressed; 1417extern counter_u64_t tcp_inp_lro_locks_taken; 1418extern counter_u64_t tcp_extra_mbuf; 1419extern counter_u64_t tcp_would_have_but; 1420extern counter_u64_t tcp_comp_total; 1421extern counter_u64_t tcp_uncomp_total; 1422extern counter_u64_t tcp_bad_csums; 1423 1424extern uint32_t tcp_ack_war_time_window; 1425extern uint32_t tcp_ack_war_cnt; 1426 1427/* 1428 * Used by tcp_maxmtu() to communicate interface specific features 1429 * and limits at the time of connection setup. 1430 */ 1431struct tcp_ifcap { 1432 int ifcap; 1433 u_int tsomax; 1434 u_int tsomaxsegcount; 1435 u_int tsomaxsegsize; 1436}; 1437uint32_t tcp_maxmtu(struct in_conninfo *, struct tcp_ifcap *); 1438uint32_t tcp_maxmtu6(struct in_conninfo *, struct tcp_ifcap *); 1439 1440void tcp6_use_min_mtu(struct tcpcb *); 1441u_int tcp_maxseg(const struct tcpcb *); 1442u_int tcp_fixed_maxseg(const struct tcpcb *); 1443void tcp_mss_update(struct tcpcb *, int, int, struct hc_metrics_lite *, 1444 struct tcp_ifcap *); 1445void tcp_mss(struct tcpcb *, int); 1446int tcp_mssopt(struct in_conninfo *); 1447struct tcpcb * 1448 tcp_newtcpcb(struct inpcb *); 1449int tcp_default_output(struct tcpcb *); 1450void tcp_state_change(struct tcpcb *, int); 1451void tcp_respond(struct tcpcb *, void *, 1452 struct tcphdr *, struct mbuf *, tcp_seq, tcp_seq, uint16_t); 1453bool tcp_twcheck(struct inpcb *, struct tcpopt *, struct tcphdr *, 1454 struct mbuf *, int); 1455void tcp_setpersist(struct tcpcb *); 1456void tcp_record_dsack(struct tcpcb *tp, tcp_seq start, tcp_seq end, int tlp); 1457struct tcptemp * 1458 tcpip_maketemplate(struct inpcb *); 1459void tcpip_fillheaders(struct inpcb *, uint16_t, void *, void *); 1460void tcp_timer_activate(struct tcpcb *, tt_which, u_int); 1461bool tcp_timer_active(struct tcpcb *, tt_which); 1462void tcp_timer_stop(struct tcpcb *); 1463int inp_to_cpuid(struct inpcb *inp); 1464/* 1465 * All tcp_hc_* functions are IPv4 and IPv6 (via in_conninfo) 1466 */ 1467void tcp_hc_init(void); 1468#ifdef VIMAGE 1469void tcp_hc_destroy(void); 1470#endif 1471void tcp_hc_get(struct in_conninfo *, struct hc_metrics_lite *); 1472uint32_t tcp_hc_getmtu(struct in_conninfo *); 1473void tcp_hc_updatemtu(struct in_conninfo *, uint32_t); 1474void tcp_hc_update(struct in_conninfo *, struct hc_metrics_lite *); 1475void cc_after_idle(struct tcpcb *tp); 1476 1477extern struct protosw tcp_protosw; /* shared for TOE */ 1478extern struct protosw tcp6_protosw; /* shared for TOE */ 1479 1480uint32_t tcp_new_ts_offset(struct in_conninfo *); 1481tcp_seq tcp_new_isn(struct in_conninfo *); 1482 1483sackstatus_t 1484 tcp_sack_doack(struct tcpcb *, struct tcpopt *, tcp_seq); 1485int tcp_dsack_block_exists(struct tcpcb *); 1486void tcp_update_dsack_list(struct tcpcb *, tcp_seq, tcp_seq); 1487void tcp_update_sack_list(struct tcpcb *tp, tcp_seq rcv_laststart, 1488 tcp_seq rcv_lastend); 1489void tcp_clean_dsack_blocks(struct tcpcb *tp); 1490void tcp_clean_sackreport(struct tcpcb *tp); 1491void tcp_sack_adjust(struct tcpcb *tp); 1492struct sackhole *tcp_sack_output(struct tcpcb *tp, int *sack_bytes_rexmt); 1493void tcp_do_prr_ack(struct tcpcb *, struct tcphdr *, struct tcpopt *, 1494 sackstatus_t, u_int *); 1495void tcp_lost_retransmission(struct tcpcb *, struct tcphdr *); 1496void tcp_sack_partialack(struct tcpcb *, struct tcphdr *, u_int *); 1497void tcp_resend_sackholes(struct tcpcb *tp); 1498void tcp_free_sackholes(struct tcpcb *tp); 1499void tcp_sack_lost_retransmission(struct tcpcb *, struct tcphdr *); 1500int tcp_newreno(struct tcpcb *, struct tcphdr *); 1501int tcp_compute_pipe(struct tcpcb *); 1502uint32_t tcp_compute_initwnd(uint32_t); 1503void tcp_sndbuf_autoscale(struct tcpcb *, struct socket *, uint32_t); 1504int tcp_stats_sample_rollthedice(struct tcpcb *tp, void *seed_bytes, 1505 size_t seed_len); 1506int tcp_can_enable_pacing(void); 1507int tcp_incr_dgp_pacing_cnt(void); 1508void tcp_dec_dgp_pacing_cnt(void); 1509void tcp_decrement_paced_conn(void); 1510void tcp_change_time_units(struct tcpcb *, int); 1511void tcp_handle_orphaned_packets(struct tcpcb *); 1512 1513struct mbuf * 1514 tcp_m_copym(struct mbuf *m, int32_t off0, int32_t *plen, 1515 int32_t seglimit, int32_t segsize, struct sockbuf *sb, bool hw_tls); 1516 1517int tcp_stats_init(void); 1518void tcp_log_end_status(struct tcpcb *tp, uint8_t status); 1519#ifdef TCP_REQUEST_TRK 1520void tcp_req_free_a_slot(struct tcpcb *tp, struct tcp_sendfile_track *ent); 1521struct tcp_sendfile_track * 1522tcp_req_find_a_req_that_is_completed_by(struct tcpcb *tp, tcp_seq th_ack, int *ip); 1523int tcp_req_check_for_comp(struct tcpcb *tp, tcp_seq ack_point); 1524int 1525tcp_req_is_entry_comp(struct tcpcb *tp, struct tcp_sendfile_track *ent, tcp_seq ack_point); 1526struct tcp_sendfile_track * 1527tcp_req_find_req_for_seq(struct tcpcb *tp, tcp_seq seq); 1528void 1529tcp_req_log_req_info(struct tcpcb *tp, 1530 struct tcp_sendfile_track *req, uint16_t slot, 1531 uint8_t val, uint64_t offset, uint64_t nbytes); 1532 1533uint32_t 1534tcp_estimate_tls_overhead(struct socket *so, uint64_t tls_usr_bytes); 1535void 1536tcp_req_alloc_req(struct tcpcb *tp, union tcp_log_userdata *user, 1537 uint64_t ts); 1538 1539struct tcp_sendfile_track * 1540tcp_req_alloc_req_full(struct tcpcb *tp, struct tcp_snd_req *req, uint64_t ts, int rec_dups); 1541 1542 1543#endif 1544#ifdef TCP_ACCOUNTING 1545int tcp_do_ack_accounting(struct tcpcb *tp, struct tcphdr *th, struct tcpopt *to, uint32_t tiwin, int mss); 1546#endif 1547 1548static inline void 1549tcp_lro_features_off(struct tcpcb *tp) 1550{ 1551 tp->t_flags2 &= ~(TF2_SUPPORTS_MBUFQ| 1552 TF2_MBUF_QUEUE_READY| 1553 TF2_DONT_SACK_QUEUE| 1554 TF2_MBUF_ACKCMP| 1555 TF2_MBUF_L_ACKS); 1556} 1557 1558static inline void 1559tcp_fields_to_host(struct tcphdr *th) 1560{ 1561 1562 th->th_seq = ntohl(th->th_seq); 1563 th->th_ack = ntohl(th->th_ack); 1564 th->th_win = ntohs(th->th_win); 1565 th->th_urp = ntohs(th->th_urp); 1566} 1567 1568static inline void 1569tcp_fields_to_net(struct tcphdr *th) 1570{ 1571 1572 th->th_seq = htonl(th->th_seq); 1573 th->th_ack = htonl(th->th_ack); 1574 th->th_win = htons(th->th_win); 1575 th->th_urp = htons(th->th_urp); 1576} 1577#endif /* _KERNEL */ 1578 1579#endif /* _NETINET_TCP_VAR_H_ */ 1580