1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1982, 1986, 1988, 1993 5 * The Regents of the University of California. 6 * Copyright (c) 2006-2007 Robert N. M. Watson 7 * Copyright (c) 2010-2011 Juniper Networks, Inc. 8 * All rights reserved. 9 * 10 * Portions of this software were developed by Robert N. M. Watson under 11 * contract to Juniper Networks, Inc. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * From: @(#)tcp_usrreq.c 8.2 (Berkeley) 1/3/94 38 */ 39 40 #include <sys/cdefs.h> 41 __FBSDID("$FreeBSD$"); 42 43 #include "opt_ddb.h" 44 #include "opt_inet.h" 45 #include "opt_inet6.h" 46 #include "opt_ipsec.h" 47 #include "opt_tcpdebug.h" 48 49 #include <sys/param.h> 50 #include <sys/systm.h> 51 #include <sys/limits.h> 52 #include <sys/malloc.h> 53 #include <sys/refcount.h> 54 #include <sys/kernel.h> 55 #include <sys/sysctl.h> 56 #include <sys/mbuf.h> 57 #ifdef INET6 58 #include <sys/domain.h> 59 #endif /* INET6 */ 60 #include <sys/socket.h> 61 #include <sys/socketvar.h> 62 #include <sys/protosw.h> 63 #include <sys/proc.h> 64 #include <sys/jail.h> 65 #include <sys/syslog.h> 66 67 #ifdef DDB 68 #include <ddb/ddb.h> 69 #endif 70 71 #include <net/if.h> 72 #include <net/if_var.h> 73 #include <net/route.h> 74 #include <net/vnet.h> 75 76 #include <netinet/in.h> 77 #include <netinet/in_kdtrace.h> 78 #include <netinet/in_pcb.h> 79 #include <netinet/in_systm.h> 80 #include <netinet/in_var.h> 81 #include <netinet/ip_var.h> 82 #ifdef INET6 83 #include <netinet/ip6.h> 84 #include <netinet6/in6_pcb.h> 85 #include <netinet6/ip6_var.h> 86 #include <netinet6/scope6_var.h> 87 #endif 88 #include <netinet/tcp.h> 89 #include <netinet/tcp_fsm.h> 90 #include <netinet/tcp_seq.h> 91 #include <netinet/tcp_timer.h> 92 #include <netinet/tcp_var.h> 93 #include <netinet/tcp_log_buf.h> 94 #include <netinet/tcpip.h> 95 #include <netinet/cc/cc.h> 96 #include <netinet/tcp_fastopen.h> 97 #include <netinet/tcp_hpts.h> 98 #ifdef TCPPCAP 99 #include <netinet/tcp_pcap.h> 100 #endif 101 #ifdef TCPDEBUG 102 #include <netinet/tcp_debug.h> 103 #endif 104 #ifdef TCP_OFFLOAD 105 #include <netinet/tcp_offload.h> 106 #endif 107 #include <netipsec/ipsec_support.h> 108 109 /* 110 * TCP protocol interface to socket abstraction. 111 */ 112 static int tcp_attach(struct socket *); 113 #ifdef INET 114 static int tcp_connect(struct tcpcb *, struct sockaddr *, 115 struct thread *td); 116 #endif /* INET */ 117 #ifdef INET6 118 static int tcp6_connect(struct tcpcb *, struct sockaddr *, 119 struct thread *td); 120 #endif /* INET6 */ 121 static void tcp_disconnect(struct tcpcb *); 122 static void tcp_usrclosed(struct tcpcb *); 123 static void tcp_fill_info(struct tcpcb *, struct tcp_info *); 124 125 #ifdef TCPDEBUG 126 #define TCPDEBUG0 int ostate = 0 127 #define TCPDEBUG1() ostate = tp ? tp->t_state : 0 128 #define TCPDEBUG2(req) if (tp && (so->so_options & SO_DEBUG)) \ 129 tcp_trace(TA_USER, ostate, tp, 0, 0, req) 130 #else 131 #define TCPDEBUG0 132 #define TCPDEBUG1() 133 #define TCPDEBUG2(req) 134 #endif 135 136 /* 137 * TCP attaches to socket via pru_attach(), reserving space, 138 * and an internet control block. 139 */ 140 static int 141 tcp_usr_attach(struct socket *so, int proto, struct thread *td) 142 { 143 struct inpcb *inp; 144 struct tcpcb *tp = NULL; 145 int error; 146 TCPDEBUG0; 147 148 inp = sotoinpcb(so); 149 KASSERT(inp == NULL, ("tcp_usr_attach: inp != NULL")); 150 TCPDEBUG1(); 151 152 error = tcp_attach(so); 153 if (error) 154 goto out; 155 156 if ((so->so_options & SO_LINGER) && so->so_linger == 0) 157 so->so_linger = TCP_LINGERTIME; 158 159 inp = sotoinpcb(so); 160 tp = intotcpcb(inp); 161 out: 162 TCPDEBUG2(PRU_ATTACH); 163 TCP_PROBE2(debug__user, tp, PRU_ATTACH); 164 return error; 165 } 166 167 /* 168 * tcp_detach is called when the socket layer loses its final reference 169 * to the socket, be it a file descriptor reference, a reference from TCP, 170 * etc. At this point, there is only one case in which we will keep around 171 * inpcb state: time wait. 172 * 173 * This function can probably be re-absorbed back into tcp_usr_detach() now 174 * that there is a single detach path. 175 */ 176 static void 177 tcp_detach(struct socket *so, struct inpcb *inp) 178 { 179 struct tcpcb *tp; 180 181 INP_INFO_LOCK_ASSERT(&V_tcbinfo); 182 INP_WLOCK_ASSERT(inp); 183 184 KASSERT(so->so_pcb == inp, ("tcp_detach: so_pcb != inp")); 185 KASSERT(inp->inp_socket == so, ("tcp_detach: inp_socket != so")); 186 187 tp = intotcpcb(inp); 188 189 if (inp->inp_flags & INP_TIMEWAIT) { 190 /* 191 * There are two cases to handle: one in which the time wait 192 * state is being discarded (INP_DROPPED), and one in which 193 * this connection will remain in timewait. In the former, 194 * it is time to discard all state (except tcptw, which has 195 * already been discarded by the timewait close code, which 196 * should be further up the call stack somewhere). In the 197 * latter case, we detach from the socket, but leave the pcb 198 * present until timewait ends. 199 * 200 * XXXRW: Would it be cleaner to free the tcptw here? 201 * 202 * Astute question indeed, from twtcp perspective there are 203 * four cases to consider: 204 * 205 * #1 tcp_detach is called at tcptw creation time by 206 * tcp_twstart, then do not discard the newly created tcptw 207 * and leave inpcb present until timewait ends 208 * #2 tcp_detach is called at tcptw creation time by 209 * tcp_twstart, but connection is local and tw will be 210 * discarded immediately 211 * #3 tcp_detach is called at timewait end (or reuse) by 212 * tcp_twclose, then the tcptw has already been discarded 213 * (or reused) and inpcb is freed here 214 * #4 tcp_detach is called() after timewait ends (or reuse) 215 * (e.g. by soclose), then tcptw has already been discarded 216 * (or reused) and inpcb is freed here 217 * 218 * In all three cases the tcptw should not be freed here. 219 */ 220 if (inp->inp_flags & INP_DROPPED) { 221 in_pcbdetach(inp); 222 if (__predict_true(tp == NULL)) { 223 in_pcbfree(inp); 224 } else { 225 /* 226 * This case should not happen as in TIMEWAIT 227 * state the inp should not be destroyed before 228 * its tcptw. If INVARIANTS is defined, panic. 229 */ 230 #ifdef INVARIANTS 231 panic("%s: Panic before an inp double-free: " 232 "INP_TIMEWAIT && INP_DROPPED && tp != NULL" 233 , __func__); 234 #else 235 log(LOG_ERR, "%s: Avoid an inp double-free: " 236 "INP_TIMEWAIT && INP_DROPPED && tp != NULL" 237 , __func__); 238 #endif 239 INP_WUNLOCK(inp); 240 } 241 } else { 242 in_pcbdetach(inp); 243 INP_WUNLOCK(inp); 244 } 245 } else { 246 /* 247 * If the connection is not in timewait, we consider two 248 * two conditions: one in which no further processing is 249 * necessary (dropped || embryonic), and one in which TCP is 250 * not yet done, but no longer requires the socket, so the 251 * pcb will persist for the time being. 252 * 253 * XXXRW: Does the second case still occur? 254 */ 255 if (inp->inp_flags & INP_DROPPED || 256 tp->t_state < TCPS_SYN_SENT) { 257 tcp_discardcb(tp); 258 in_pcbdetach(inp); 259 in_pcbfree(inp); 260 } else { 261 in_pcbdetach(inp); 262 INP_WUNLOCK(inp); 263 } 264 } 265 } 266 267 /* 268 * pru_detach() detaches the TCP protocol from the socket. 269 * If the protocol state is non-embryonic, then can't 270 * do this directly: have to initiate a pru_disconnect(), 271 * which may finish later; embryonic TCB's can just 272 * be discarded here. 273 */ 274 static void 275 tcp_usr_detach(struct socket *so) 276 { 277 struct inpcb *inp; 278 int rlock = 0; 279 struct epoch_tracker et; 280 281 inp = sotoinpcb(so); 282 KASSERT(inp != NULL, ("tcp_usr_detach: inp == NULL")); 283 if (!INP_INFO_WLOCKED(&V_tcbinfo)) { 284 INP_INFO_RLOCK_ET(&V_tcbinfo, et); 285 rlock = 1; 286 } 287 INP_WLOCK(inp); 288 KASSERT(inp->inp_socket != NULL, 289 ("tcp_usr_detach: inp_socket == NULL")); 290 tcp_detach(so, inp); 291 if (rlock) 292 INP_INFO_RUNLOCK_ET(&V_tcbinfo, et); 293 } 294 295 #ifdef INET 296 /* 297 * Give the socket an address. 298 */ 299 static int 300 tcp_usr_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 301 { 302 int error = 0; 303 struct inpcb *inp; 304 struct tcpcb *tp = NULL; 305 struct sockaddr_in *sinp; 306 307 sinp = (struct sockaddr_in *)nam; 308 if (nam->sa_len != sizeof (*sinp)) 309 return (EINVAL); 310 /* 311 * Must check for multicast addresses and disallow binding 312 * to them. 313 */ 314 if (sinp->sin_family == AF_INET && 315 IN_MULTICAST(ntohl(sinp->sin_addr.s_addr))) 316 return (EAFNOSUPPORT); 317 318 TCPDEBUG0; 319 inp = sotoinpcb(so); 320 KASSERT(inp != NULL, ("tcp_usr_bind: inp == NULL")); 321 INP_WLOCK(inp); 322 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 323 error = EINVAL; 324 goto out; 325 } 326 tp = intotcpcb(inp); 327 TCPDEBUG1(); 328 INP_HASH_WLOCK(&V_tcbinfo); 329 error = in_pcbbind(inp, nam, td->td_ucred); 330 INP_HASH_WUNLOCK(&V_tcbinfo); 331 out: 332 TCPDEBUG2(PRU_BIND); 333 TCP_PROBE2(debug__user, tp, PRU_BIND); 334 INP_WUNLOCK(inp); 335 336 return (error); 337 } 338 #endif /* INET */ 339 340 #ifdef INET6 341 static int 342 tcp6_usr_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 343 { 344 int error = 0; 345 struct inpcb *inp; 346 struct tcpcb *tp = NULL; 347 struct sockaddr_in6 *sin6p; 348 349 sin6p = (struct sockaddr_in6 *)nam; 350 if (nam->sa_len != sizeof (*sin6p)) 351 return (EINVAL); 352 /* 353 * Must check for multicast addresses and disallow binding 354 * to them. 355 */ 356 if (sin6p->sin6_family == AF_INET6 && 357 IN6_IS_ADDR_MULTICAST(&sin6p->sin6_addr)) 358 return (EAFNOSUPPORT); 359 360 TCPDEBUG0; 361 inp = sotoinpcb(so); 362 KASSERT(inp != NULL, ("tcp6_usr_bind: inp == NULL")); 363 INP_WLOCK(inp); 364 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 365 error = EINVAL; 366 goto out; 367 } 368 tp = intotcpcb(inp); 369 TCPDEBUG1(); 370 INP_HASH_WLOCK(&V_tcbinfo); 371 inp->inp_vflag &= ~INP_IPV4; 372 inp->inp_vflag |= INP_IPV6; 373 #ifdef INET 374 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 375 if (IN6_IS_ADDR_UNSPECIFIED(&sin6p->sin6_addr)) 376 inp->inp_vflag |= INP_IPV4; 377 else if (IN6_IS_ADDR_V4MAPPED(&sin6p->sin6_addr)) { 378 struct sockaddr_in sin; 379 380 in6_sin6_2_sin(&sin, sin6p); 381 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 382 error = EAFNOSUPPORT; 383 INP_HASH_WUNLOCK(&V_tcbinfo); 384 goto out; 385 } 386 inp->inp_vflag |= INP_IPV4; 387 inp->inp_vflag &= ~INP_IPV6; 388 error = in_pcbbind(inp, (struct sockaddr *)&sin, 389 td->td_ucred); 390 INP_HASH_WUNLOCK(&V_tcbinfo); 391 goto out; 392 } 393 } 394 #endif 395 error = in6_pcbbind(inp, nam, td->td_ucred); 396 INP_HASH_WUNLOCK(&V_tcbinfo); 397 out: 398 TCPDEBUG2(PRU_BIND); 399 TCP_PROBE2(debug__user, tp, PRU_BIND); 400 INP_WUNLOCK(inp); 401 return (error); 402 } 403 #endif /* INET6 */ 404 405 #ifdef INET 406 /* 407 * Prepare to accept connections. 408 */ 409 static int 410 tcp_usr_listen(struct socket *so, int backlog, struct thread *td) 411 { 412 int error = 0; 413 struct inpcb *inp; 414 struct tcpcb *tp = NULL; 415 416 TCPDEBUG0; 417 inp = sotoinpcb(so); 418 KASSERT(inp != NULL, ("tcp_usr_listen: inp == NULL")); 419 INP_WLOCK(inp); 420 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 421 error = EINVAL; 422 goto out; 423 } 424 tp = intotcpcb(inp); 425 TCPDEBUG1(); 426 SOCK_LOCK(so); 427 error = solisten_proto_check(so); 428 INP_HASH_WLOCK(&V_tcbinfo); 429 if (error == 0 && inp->inp_lport == 0) 430 error = in_pcbbind(inp, (struct sockaddr *)0, td->td_ucred); 431 INP_HASH_WUNLOCK(&V_tcbinfo); 432 if (error == 0) { 433 tcp_state_change(tp, TCPS_LISTEN); 434 solisten_proto(so, backlog); 435 #ifdef TCP_OFFLOAD 436 if ((so->so_options & SO_NO_OFFLOAD) == 0) 437 tcp_offload_listen_start(tp); 438 #endif 439 } 440 SOCK_UNLOCK(so); 441 442 if (IS_FASTOPEN(tp->t_flags)) 443 tp->t_tfo_pending = tcp_fastopen_alloc_counter(); 444 445 out: 446 TCPDEBUG2(PRU_LISTEN); 447 TCP_PROBE2(debug__user, tp, PRU_LISTEN); 448 INP_WUNLOCK(inp); 449 return (error); 450 } 451 #endif /* INET */ 452 453 #ifdef INET6 454 static int 455 tcp6_usr_listen(struct socket *so, int backlog, struct thread *td) 456 { 457 int error = 0; 458 struct inpcb *inp; 459 struct tcpcb *tp = NULL; 460 461 TCPDEBUG0; 462 inp = sotoinpcb(so); 463 KASSERT(inp != NULL, ("tcp6_usr_listen: inp == NULL")); 464 INP_WLOCK(inp); 465 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 466 error = EINVAL; 467 goto out; 468 } 469 tp = intotcpcb(inp); 470 TCPDEBUG1(); 471 SOCK_LOCK(so); 472 error = solisten_proto_check(so); 473 INP_HASH_WLOCK(&V_tcbinfo); 474 if (error == 0 && inp->inp_lport == 0) { 475 inp->inp_vflag &= ~INP_IPV4; 476 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) 477 inp->inp_vflag |= INP_IPV4; 478 error = in6_pcbbind(inp, (struct sockaddr *)0, td->td_ucred); 479 } 480 INP_HASH_WUNLOCK(&V_tcbinfo); 481 if (error == 0) { 482 tcp_state_change(tp, TCPS_LISTEN); 483 solisten_proto(so, backlog); 484 #ifdef TCP_OFFLOAD 485 if ((so->so_options & SO_NO_OFFLOAD) == 0) 486 tcp_offload_listen_start(tp); 487 #endif 488 } 489 SOCK_UNLOCK(so); 490 491 if (IS_FASTOPEN(tp->t_flags)) 492 tp->t_tfo_pending = tcp_fastopen_alloc_counter(); 493 494 out: 495 TCPDEBUG2(PRU_LISTEN); 496 TCP_PROBE2(debug__user, tp, PRU_LISTEN); 497 INP_WUNLOCK(inp); 498 return (error); 499 } 500 #endif /* INET6 */ 501 502 #ifdef INET 503 /* 504 * Initiate connection to peer. 505 * Create a template for use in transmissions on this connection. 506 * Enter SYN_SENT state, and mark socket as connecting. 507 * Start keep-alive timer, and seed output sequence space. 508 * Send initial segment on connection. 509 */ 510 static int 511 tcp_usr_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 512 { 513 int error = 0; 514 struct inpcb *inp; 515 struct tcpcb *tp = NULL; 516 struct sockaddr_in *sinp; 517 518 sinp = (struct sockaddr_in *)nam; 519 if (nam->sa_len != sizeof (*sinp)) 520 return (EINVAL); 521 /* 522 * Must disallow TCP ``connections'' to multicast addresses. 523 */ 524 if (sinp->sin_family == AF_INET 525 && IN_MULTICAST(ntohl(sinp->sin_addr.s_addr))) 526 return (EAFNOSUPPORT); 527 if ((error = prison_remote_ip4(td->td_ucred, &sinp->sin_addr)) != 0) 528 return (error); 529 530 TCPDEBUG0; 531 inp = sotoinpcb(so); 532 KASSERT(inp != NULL, ("tcp_usr_connect: inp == NULL")); 533 INP_WLOCK(inp); 534 if (inp->inp_flags & INP_TIMEWAIT) { 535 error = EADDRINUSE; 536 goto out; 537 } 538 if (inp->inp_flags & INP_DROPPED) { 539 error = ECONNREFUSED; 540 goto out; 541 } 542 tp = intotcpcb(inp); 543 TCPDEBUG1(); 544 if ((error = tcp_connect(tp, nam, td)) != 0) 545 goto out; 546 #ifdef TCP_OFFLOAD 547 if (registered_toedevs > 0 && 548 (so->so_options & SO_NO_OFFLOAD) == 0 && 549 (error = tcp_offload_connect(so, nam)) == 0) 550 goto out; 551 #endif 552 tcp_timer_activate(tp, TT_KEEP, TP_KEEPINIT(tp)); 553 error = tp->t_fb->tfb_tcp_output(tp); 554 out: 555 TCPDEBUG2(PRU_CONNECT); 556 TCP_PROBE2(debug__user, tp, PRU_CONNECT); 557 INP_WUNLOCK(inp); 558 return (error); 559 } 560 #endif /* INET */ 561 562 #ifdef INET6 563 static int 564 tcp6_usr_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 565 { 566 int error = 0; 567 struct inpcb *inp; 568 struct tcpcb *tp = NULL; 569 struct sockaddr_in6 *sin6p; 570 571 TCPDEBUG0; 572 573 sin6p = (struct sockaddr_in6 *)nam; 574 if (nam->sa_len != sizeof (*sin6p)) 575 return (EINVAL); 576 /* 577 * Must disallow TCP ``connections'' to multicast addresses. 578 */ 579 if (sin6p->sin6_family == AF_INET6 580 && IN6_IS_ADDR_MULTICAST(&sin6p->sin6_addr)) 581 return (EAFNOSUPPORT); 582 583 inp = sotoinpcb(so); 584 KASSERT(inp != NULL, ("tcp6_usr_connect: inp == NULL")); 585 INP_WLOCK(inp); 586 if (inp->inp_flags & INP_TIMEWAIT) { 587 error = EADDRINUSE; 588 goto out; 589 } 590 if (inp->inp_flags & INP_DROPPED) { 591 error = ECONNREFUSED; 592 goto out; 593 } 594 tp = intotcpcb(inp); 595 TCPDEBUG1(); 596 #ifdef INET 597 /* 598 * XXXRW: Some confusion: V4/V6 flags relate to binding, and 599 * therefore probably require the hash lock, which isn't held here. 600 * Is this a significant problem? 601 */ 602 if (IN6_IS_ADDR_V4MAPPED(&sin6p->sin6_addr)) { 603 struct sockaddr_in sin; 604 605 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0) { 606 error = EINVAL; 607 goto out; 608 } 609 if ((inp->inp_vflag & INP_IPV4) == 0) { 610 error = EAFNOSUPPORT; 611 goto out; 612 } 613 614 in6_sin6_2_sin(&sin, sin6p); 615 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 616 error = EAFNOSUPPORT; 617 goto out; 618 } 619 inp->inp_vflag |= INP_IPV4; 620 inp->inp_vflag &= ~INP_IPV6; 621 if ((error = prison_remote_ip4(td->td_ucred, 622 &sin.sin_addr)) != 0) 623 goto out; 624 if ((error = tcp_connect(tp, (struct sockaddr *)&sin, td)) != 0) 625 goto out; 626 #ifdef TCP_OFFLOAD 627 if (registered_toedevs > 0 && 628 (so->so_options & SO_NO_OFFLOAD) == 0 && 629 (error = tcp_offload_connect(so, nam)) == 0) 630 goto out; 631 #endif 632 error = tp->t_fb->tfb_tcp_output(tp); 633 goto out; 634 } else { 635 if ((inp->inp_vflag & INP_IPV6) == 0) { 636 error = EAFNOSUPPORT; 637 goto out; 638 } 639 } 640 #endif 641 inp->inp_vflag &= ~INP_IPV4; 642 inp->inp_vflag |= INP_IPV6; 643 inp->inp_inc.inc_flags |= INC_ISIPV6; 644 if ((error = prison_remote_ip6(td->td_ucred, &sin6p->sin6_addr)) != 0) 645 goto out; 646 if ((error = tcp6_connect(tp, nam, td)) != 0) 647 goto out; 648 #ifdef TCP_OFFLOAD 649 if (registered_toedevs > 0 && 650 (so->so_options & SO_NO_OFFLOAD) == 0 && 651 (error = tcp_offload_connect(so, nam)) == 0) 652 goto out; 653 #endif 654 tcp_timer_activate(tp, TT_KEEP, TP_KEEPINIT(tp)); 655 error = tp->t_fb->tfb_tcp_output(tp); 656 657 out: 658 TCPDEBUG2(PRU_CONNECT); 659 TCP_PROBE2(debug__user, tp, PRU_CONNECT); 660 INP_WUNLOCK(inp); 661 return (error); 662 } 663 #endif /* INET6 */ 664 665 /* 666 * Initiate disconnect from peer. 667 * If connection never passed embryonic stage, just drop; 668 * else if don't need to let data drain, then can just drop anyways, 669 * else have to begin TCP shutdown process: mark socket disconnecting, 670 * drain unread data, state switch to reflect user close, and 671 * send segment (e.g. FIN) to peer. Socket will be really disconnected 672 * when peer sends FIN and acks ours. 673 * 674 * SHOULD IMPLEMENT LATER PRU_CONNECT VIA REALLOC TCPCB. 675 */ 676 static int 677 tcp_usr_disconnect(struct socket *so) 678 { 679 struct inpcb *inp; 680 struct tcpcb *tp = NULL; 681 struct epoch_tracker et; 682 int error = 0; 683 684 TCPDEBUG0; 685 INP_INFO_RLOCK_ET(&V_tcbinfo, et); 686 inp = sotoinpcb(so); 687 KASSERT(inp != NULL, ("tcp_usr_disconnect: inp == NULL")); 688 INP_WLOCK(inp); 689 if (inp->inp_flags & INP_TIMEWAIT) 690 goto out; 691 if (inp->inp_flags & INP_DROPPED) { 692 error = ECONNRESET; 693 goto out; 694 } 695 tp = intotcpcb(inp); 696 TCPDEBUG1(); 697 tcp_disconnect(tp); 698 out: 699 TCPDEBUG2(PRU_DISCONNECT); 700 TCP_PROBE2(debug__user, tp, PRU_DISCONNECT); 701 INP_WUNLOCK(inp); 702 INP_INFO_RUNLOCK_ET(&V_tcbinfo, et); 703 return (error); 704 } 705 706 #ifdef INET 707 /* 708 * Accept a connection. Essentially all the work is done at higher levels; 709 * just return the address of the peer, storing through addr. 710 */ 711 static int 712 tcp_usr_accept(struct socket *so, struct sockaddr **nam) 713 { 714 int error = 0; 715 struct inpcb *inp = NULL; 716 struct tcpcb *tp = NULL; 717 struct in_addr addr; 718 in_port_t port = 0; 719 TCPDEBUG0; 720 721 if (so->so_state & SS_ISDISCONNECTED) 722 return (ECONNABORTED); 723 724 inp = sotoinpcb(so); 725 KASSERT(inp != NULL, ("tcp_usr_accept: inp == NULL")); 726 INP_WLOCK(inp); 727 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 728 error = ECONNABORTED; 729 goto out; 730 } 731 tp = intotcpcb(inp); 732 TCPDEBUG1(); 733 734 /* 735 * We inline in_getpeeraddr and COMMON_END here, so that we can 736 * copy the data of interest and defer the malloc until after we 737 * release the lock. 738 */ 739 port = inp->inp_fport; 740 addr = inp->inp_faddr; 741 742 out: 743 TCPDEBUG2(PRU_ACCEPT); 744 TCP_PROBE2(debug__user, tp, PRU_ACCEPT); 745 INP_WUNLOCK(inp); 746 if (error == 0) 747 *nam = in_sockaddr(port, &addr); 748 return error; 749 } 750 #endif /* INET */ 751 752 #ifdef INET6 753 static int 754 tcp6_usr_accept(struct socket *so, struct sockaddr **nam) 755 { 756 struct inpcb *inp = NULL; 757 int error = 0; 758 struct tcpcb *tp = NULL; 759 struct in_addr addr; 760 struct in6_addr addr6; 761 struct epoch_tracker et; 762 in_port_t port = 0; 763 int v4 = 0; 764 TCPDEBUG0; 765 766 if (so->so_state & SS_ISDISCONNECTED) 767 return (ECONNABORTED); 768 769 inp = sotoinpcb(so); 770 KASSERT(inp != NULL, ("tcp6_usr_accept: inp == NULL")); 771 INP_INFO_RLOCK_ET(&V_tcbinfo, et); 772 INP_WLOCK(inp); 773 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 774 error = ECONNABORTED; 775 goto out; 776 } 777 tp = intotcpcb(inp); 778 TCPDEBUG1(); 779 780 /* 781 * We inline in6_mapped_peeraddr and COMMON_END here, so that we can 782 * copy the data of interest and defer the malloc until after we 783 * release the lock. 784 */ 785 if (inp->inp_vflag & INP_IPV4) { 786 v4 = 1; 787 port = inp->inp_fport; 788 addr = inp->inp_faddr; 789 } else { 790 port = inp->inp_fport; 791 addr6 = inp->in6p_faddr; 792 } 793 794 out: 795 TCPDEBUG2(PRU_ACCEPT); 796 TCP_PROBE2(debug__user, tp, PRU_ACCEPT); 797 INP_WUNLOCK(inp); 798 INP_INFO_RUNLOCK_ET(&V_tcbinfo, et); 799 if (error == 0) { 800 if (v4) 801 *nam = in6_v4mapsin6_sockaddr(port, &addr); 802 else 803 *nam = in6_sockaddr(port, &addr6); 804 } 805 return error; 806 } 807 #endif /* INET6 */ 808 809 /* 810 * Mark the connection as being incapable of further output. 811 */ 812 static int 813 tcp_usr_shutdown(struct socket *so) 814 { 815 int error = 0; 816 struct inpcb *inp; 817 struct tcpcb *tp = NULL; 818 struct epoch_tracker et; 819 820 TCPDEBUG0; 821 INP_INFO_RLOCK_ET(&V_tcbinfo, et); 822 inp = sotoinpcb(so); 823 KASSERT(inp != NULL, ("inp == NULL")); 824 INP_WLOCK(inp); 825 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 826 error = ECONNRESET; 827 goto out; 828 } 829 tp = intotcpcb(inp); 830 TCPDEBUG1(); 831 socantsendmore(so); 832 tcp_usrclosed(tp); 833 if (!(inp->inp_flags & INP_DROPPED)) 834 error = tp->t_fb->tfb_tcp_output(tp); 835 836 out: 837 TCPDEBUG2(PRU_SHUTDOWN); 838 TCP_PROBE2(debug__user, tp, PRU_SHUTDOWN); 839 INP_WUNLOCK(inp); 840 INP_INFO_RUNLOCK_ET(&V_tcbinfo, et); 841 842 return (error); 843 } 844 845 /* 846 * After a receive, possibly send window update to peer. 847 */ 848 static int 849 tcp_usr_rcvd(struct socket *so, int flags) 850 { 851 struct inpcb *inp; 852 struct tcpcb *tp = NULL; 853 int error = 0; 854 855 TCPDEBUG0; 856 inp = sotoinpcb(so); 857 KASSERT(inp != NULL, ("tcp_usr_rcvd: inp == NULL")); 858 INP_WLOCK(inp); 859 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 860 error = ECONNRESET; 861 goto out; 862 } 863 tp = intotcpcb(inp); 864 TCPDEBUG1(); 865 /* 866 * For passively-created TFO connections, don't attempt a window 867 * update while still in SYN_RECEIVED as this may trigger an early 868 * SYN|ACK. It is preferable to have the SYN|ACK be sent along with 869 * application response data, or failing that, when the DELACK timer 870 * expires. 871 */ 872 if (IS_FASTOPEN(tp->t_flags) && 873 (tp->t_state == TCPS_SYN_RECEIVED)) 874 goto out; 875 #ifdef TCP_OFFLOAD 876 if (tp->t_flags & TF_TOE) 877 tcp_offload_rcvd(tp); 878 else 879 #endif 880 tp->t_fb->tfb_tcp_output(tp); 881 882 out: 883 TCPDEBUG2(PRU_RCVD); 884 TCP_PROBE2(debug__user, tp, PRU_RCVD); 885 INP_WUNLOCK(inp); 886 return (error); 887 } 888 889 /* 890 * Do a send by putting data in output queue and updating urgent 891 * marker if URG set. Possibly send more data. Unlike the other 892 * pru_*() routines, the mbuf chains are our responsibility. We 893 * must either enqueue them or free them. The other pru_* routines 894 * generally are caller-frees. 895 */ 896 static int 897 tcp_usr_send(struct socket *so, int flags, struct mbuf *m, 898 struct sockaddr *nam, struct mbuf *control, struct thread *td) 899 { 900 int error = 0; 901 struct inpcb *inp; 902 struct tcpcb *tp = NULL; 903 struct epoch_tracker net_et; 904 #ifdef INET 905 #ifdef INET6 906 struct sockaddr_in sin; 907 #endif 908 struct sockaddr_in *sinp; 909 #endif 910 #ifdef INET6 911 int isipv6; 912 #endif 913 TCPDEBUG0; 914 915 /* 916 * We require the pcbinfo lock if we will close the socket as part of 917 * this call. 918 */ 919 if (flags & PRUS_EOF) 920 INP_INFO_RLOCK_ET(&V_tcbinfo, net_et); 921 inp = sotoinpcb(so); 922 KASSERT(inp != NULL, ("tcp_usr_send: inp == NULL")); 923 INP_WLOCK(inp); 924 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 925 if (control) 926 m_freem(control); 927 /* 928 * In case of PRUS_NOTREADY, tcp_usr_ready() is responsible 929 * for freeing memory. 930 */ 931 if (m && (flags & PRUS_NOTREADY) == 0) 932 m_freem(m); 933 error = ECONNRESET; 934 goto out; 935 } 936 tp = intotcpcb(inp); 937 TCPDEBUG1(); 938 if (nam != NULL && tp->t_state < TCPS_SYN_SENT) { 939 switch (nam->sa_family) { 940 #ifdef INET 941 case AF_INET: 942 sinp = (struct sockaddr_in *)nam; 943 if (sinp->sin_len != sizeof(struct sockaddr_in)) { 944 if (m) 945 m_freem(m); 946 error = EINVAL; 947 goto out; 948 } 949 if ((inp->inp_vflag & INP_IPV6) != 0) { 950 if (m) 951 m_freem(m); 952 error = EAFNOSUPPORT; 953 goto out; 954 } 955 if (IN_MULTICAST(ntohl(sinp->sin_addr.s_addr))) { 956 if (m) 957 m_freem(m); 958 error = EAFNOSUPPORT; 959 goto out; 960 } 961 if ((error = prison_remote_ip4(td->td_ucred, 962 &sinp->sin_addr))) { 963 if (m) 964 m_freem(m); 965 goto out; 966 } 967 #ifdef INET6 968 isipv6 = 0; 969 #endif 970 break; 971 #endif /* INET */ 972 #ifdef INET6 973 case AF_INET6: 974 { 975 struct sockaddr_in6 *sin6p; 976 977 sin6p = (struct sockaddr_in6 *)nam; 978 if (sin6p->sin6_len != sizeof(struct sockaddr_in6)) { 979 if (m) 980 m_freem(m); 981 error = EINVAL; 982 goto out; 983 } 984 if (IN6_IS_ADDR_MULTICAST(&sin6p->sin6_addr)) { 985 if (m) 986 m_freem(m); 987 error = EAFNOSUPPORT; 988 goto out; 989 } 990 if (IN6_IS_ADDR_V4MAPPED(&sin6p->sin6_addr)) { 991 #ifdef INET 992 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0) { 993 error = EINVAL; 994 if (m) 995 m_freem(m); 996 goto out; 997 } 998 if ((inp->inp_vflag & INP_IPV4) == 0) { 999 error = EAFNOSUPPORT; 1000 if (m) 1001 m_freem(m); 1002 goto out; 1003 } 1004 inp->inp_vflag &= ~INP_IPV6; 1005 sinp = &sin; 1006 in6_sin6_2_sin(sinp, sin6p); 1007 if (IN_MULTICAST( 1008 ntohl(sinp->sin_addr.s_addr))) { 1009 error = EAFNOSUPPORT; 1010 if (m) 1011 m_freem(m); 1012 goto out; 1013 } 1014 if ((error = prison_remote_ip4(td->td_ucred, 1015 &sinp->sin_addr))) { 1016 if (m) 1017 m_freem(m); 1018 goto out; 1019 } 1020 isipv6 = 0; 1021 #else /* !INET */ 1022 error = EAFNOSUPPORT; 1023 if (m) 1024 m_freem(m); 1025 goto out; 1026 #endif /* INET */ 1027 } else { 1028 if ((inp->inp_vflag & INP_IPV6) == 0) { 1029 if (m) 1030 m_freem(m); 1031 error = EAFNOSUPPORT; 1032 goto out; 1033 } 1034 inp->inp_vflag &= ~INP_IPV4; 1035 inp->inp_inc.inc_flags |= INC_ISIPV6; 1036 if ((error = prison_remote_ip6(td->td_ucred, 1037 &sin6p->sin6_addr))) { 1038 if (m) 1039 m_freem(m); 1040 goto out; 1041 } 1042 isipv6 = 1; 1043 } 1044 break; 1045 } 1046 #endif /* INET6 */ 1047 default: 1048 if (m) 1049 m_freem(m); 1050 error = EAFNOSUPPORT; 1051 goto out; 1052 } 1053 } 1054 if (control) { 1055 /* TCP doesn't do control messages (rights, creds, etc) */ 1056 if (control->m_len) { 1057 m_freem(control); 1058 if (m) 1059 m_freem(m); 1060 error = EINVAL; 1061 goto out; 1062 } 1063 m_freem(control); /* empty control, just free it */ 1064 } 1065 if (!(flags & PRUS_OOB)) { 1066 sbappendstream(&so->so_snd, m, flags); 1067 if (nam && tp->t_state < TCPS_SYN_SENT) { 1068 /* 1069 * Do implied connect if not yet connected, 1070 * initialize window to default value, and 1071 * initialize maxseg using peer's cached MSS. 1072 */ 1073 #ifdef INET6 1074 if (isipv6) 1075 error = tcp6_connect(tp, nam, td); 1076 #endif /* INET6 */ 1077 #if defined(INET6) && defined(INET) 1078 else 1079 #endif 1080 #ifdef INET 1081 error = tcp_connect(tp, 1082 (struct sockaddr *)sinp, td); 1083 #endif 1084 if (error) 1085 goto out; 1086 if (IS_FASTOPEN(tp->t_flags)) 1087 tcp_fastopen_connect(tp); 1088 else { 1089 tp->snd_wnd = TTCP_CLIENT_SND_WND; 1090 tcp_mss(tp, -1); 1091 } 1092 } 1093 if (flags & PRUS_EOF) { 1094 /* 1095 * Close the send side of the connection after 1096 * the data is sent. 1097 */ 1098 INP_INFO_RLOCK_ASSERT(&V_tcbinfo); 1099 socantsendmore(so); 1100 tcp_usrclosed(tp); 1101 } 1102 if (!(inp->inp_flags & INP_DROPPED) && 1103 !(flags & PRUS_NOTREADY)) { 1104 if (flags & PRUS_MORETOCOME) 1105 tp->t_flags |= TF_MORETOCOME; 1106 error = tp->t_fb->tfb_tcp_output(tp); 1107 if (flags & PRUS_MORETOCOME) 1108 tp->t_flags &= ~TF_MORETOCOME; 1109 } 1110 } else { 1111 /* 1112 * XXXRW: PRUS_EOF not implemented with PRUS_OOB? 1113 */ 1114 SOCKBUF_LOCK(&so->so_snd); 1115 if (sbspace(&so->so_snd) < -512) { 1116 SOCKBUF_UNLOCK(&so->so_snd); 1117 m_freem(m); 1118 error = ENOBUFS; 1119 goto out; 1120 } 1121 /* 1122 * According to RFC961 (Assigned Protocols), 1123 * the urgent pointer points to the last octet 1124 * of urgent data. We continue, however, 1125 * to consider it to indicate the first octet 1126 * of data past the urgent section. 1127 * Otherwise, snd_up should be one lower. 1128 */ 1129 sbappendstream_locked(&so->so_snd, m, flags); 1130 SOCKBUF_UNLOCK(&so->so_snd); 1131 if (nam && tp->t_state < TCPS_SYN_SENT) { 1132 /* 1133 * Do implied connect if not yet connected, 1134 * initialize window to default value, and 1135 * initialize maxseg using peer's cached MSS. 1136 */ 1137 1138 /* 1139 * Not going to contemplate SYN|URG 1140 */ 1141 if (IS_FASTOPEN(tp->t_flags)) 1142 tp->t_flags &= ~TF_FASTOPEN; 1143 #ifdef INET6 1144 if (isipv6) 1145 error = tcp6_connect(tp, nam, td); 1146 #endif /* INET6 */ 1147 #if defined(INET6) && defined(INET) 1148 else 1149 #endif 1150 #ifdef INET 1151 error = tcp_connect(tp, 1152 (struct sockaddr *)sinp, td); 1153 #endif 1154 if (error) 1155 goto out; 1156 tp->snd_wnd = TTCP_CLIENT_SND_WND; 1157 tcp_mss(tp, -1); 1158 } 1159 tp->snd_up = tp->snd_una + sbavail(&so->so_snd); 1160 if (!(flags & PRUS_NOTREADY)) { 1161 tp->t_flags |= TF_FORCEDATA; 1162 error = tp->t_fb->tfb_tcp_output(tp); 1163 tp->t_flags &= ~TF_FORCEDATA; 1164 } 1165 } 1166 TCP_LOG_EVENT(tp, NULL, 1167 &inp->inp_socket->so_rcv, 1168 &inp->inp_socket->so_snd, 1169 TCP_LOG_USERSEND, error, 1170 0, NULL, false); 1171 out: 1172 TCPDEBUG2((flags & PRUS_OOB) ? PRU_SENDOOB : 1173 ((flags & PRUS_EOF) ? PRU_SEND_EOF : PRU_SEND)); 1174 TCP_PROBE2(debug__user, tp, (flags & PRUS_OOB) ? PRU_SENDOOB : 1175 ((flags & PRUS_EOF) ? PRU_SEND_EOF : PRU_SEND)); 1176 INP_WUNLOCK(inp); 1177 if (flags & PRUS_EOF) 1178 INP_INFO_RUNLOCK_ET(&V_tcbinfo, net_et); 1179 return (error); 1180 } 1181 1182 static int 1183 tcp_usr_ready(struct socket *so, struct mbuf *m, int count) 1184 { 1185 struct inpcb *inp; 1186 struct tcpcb *tp; 1187 int error; 1188 1189 inp = sotoinpcb(so); 1190 INP_WLOCK(inp); 1191 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 1192 INP_WUNLOCK(inp); 1193 for (int i = 0; i < count; i++) 1194 m = m_free(m); 1195 return (ECONNRESET); 1196 } 1197 tp = intotcpcb(inp); 1198 1199 SOCKBUF_LOCK(&so->so_snd); 1200 error = sbready(&so->so_snd, m, count); 1201 SOCKBUF_UNLOCK(&so->so_snd); 1202 if (error == 0) 1203 error = tp->t_fb->tfb_tcp_output(tp); 1204 INP_WUNLOCK(inp); 1205 1206 return (error); 1207 } 1208 1209 /* 1210 * Abort the TCP. Drop the connection abruptly. 1211 */ 1212 static void 1213 tcp_usr_abort(struct socket *so) 1214 { 1215 struct inpcb *inp; 1216 struct tcpcb *tp = NULL; 1217 struct epoch_tracker et; 1218 TCPDEBUG0; 1219 1220 inp = sotoinpcb(so); 1221 KASSERT(inp != NULL, ("tcp_usr_abort: inp == NULL")); 1222 1223 INP_INFO_RLOCK_ET(&V_tcbinfo, et); 1224 INP_WLOCK(inp); 1225 KASSERT(inp->inp_socket != NULL, 1226 ("tcp_usr_abort: inp_socket == NULL")); 1227 1228 /* 1229 * If we still have full TCP state, and we're not dropped, drop. 1230 */ 1231 if (!(inp->inp_flags & INP_TIMEWAIT) && 1232 !(inp->inp_flags & INP_DROPPED)) { 1233 tp = intotcpcb(inp); 1234 TCPDEBUG1(); 1235 tp = tcp_drop(tp, ECONNABORTED); 1236 if (tp == NULL) 1237 goto dropped; 1238 TCPDEBUG2(PRU_ABORT); 1239 TCP_PROBE2(debug__user, tp, PRU_ABORT); 1240 } 1241 if (!(inp->inp_flags & INP_DROPPED)) { 1242 SOCK_LOCK(so); 1243 so->so_state |= SS_PROTOREF; 1244 SOCK_UNLOCK(so); 1245 inp->inp_flags |= INP_SOCKREF; 1246 } 1247 INP_WUNLOCK(inp); 1248 dropped: 1249 INP_INFO_RUNLOCK_ET(&V_tcbinfo, et); 1250 } 1251 1252 /* 1253 * TCP socket is closed. Start friendly disconnect. 1254 */ 1255 static void 1256 tcp_usr_close(struct socket *so) 1257 { 1258 struct inpcb *inp; 1259 struct tcpcb *tp = NULL; 1260 struct epoch_tracker et; 1261 TCPDEBUG0; 1262 1263 inp = sotoinpcb(so); 1264 KASSERT(inp != NULL, ("tcp_usr_close: inp == NULL")); 1265 1266 INP_INFO_RLOCK_ET(&V_tcbinfo, et); 1267 INP_WLOCK(inp); 1268 KASSERT(inp->inp_socket != NULL, 1269 ("tcp_usr_close: inp_socket == NULL")); 1270 1271 /* 1272 * If we still have full TCP state, and we're not dropped, initiate 1273 * a disconnect. 1274 */ 1275 if (!(inp->inp_flags & INP_TIMEWAIT) && 1276 !(inp->inp_flags & INP_DROPPED)) { 1277 tp = intotcpcb(inp); 1278 TCPDEBUG1(); 1279 tcp_disconnect(tp); 1280 TCPDEBUG2(PRU_CLOSE); 1281 TCP_PROBE2(debug__user, tp, PRU_CLOSE); 1282 } 1283 if (!(inp->inp_flags & INP_DROPPED)) { 1284 SOCK_LOCK(so); 1285 so->so_state |= SS_PROTOREF; 1286 SOCK_UNLOCK(so); 1287 inp->inp_flags |= INP_SOCKREF; 1288 } 1289 INP_WUNLOCK(inp); 1290 INP_INFO_RUNLOCK_ET(&V_tcbinfo, et); 1291 } 1292 1293 /* 1294 * Receive out-of-band data. 1295 */ 1296 static int 1297 tcp_usr_rcvoob(struct socket *so, struct mbuf *m, int flags) 1298 { 1299 int error = 0; 1300 struct inpcb *inp; 1301 struct tcpcb *tp = NULL; 1302 1303 TCPDEBUG0; 1304 inp = sotoinpcb(so); 1305 KASSERT(inp != NULL, ("tcp_usr_rcvoob: inp == NULL")); 1306 INP_WLOCK(inp); 1307 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 1308 error = ECONNRESET; 1309 goto out; 1310 } 1311 tp = intotcpcb(inp); 1312 TCPDEBUG1(); 1313 if ((so->so_oobmark == 0 && 1314 (so->so_rcv.sb_state & SBS_RCVATMARK) == 0) || 1315 so->so_options & SO_OOBINLINE || 1316 tp->t_oobflags & TCPOOB_HADDATA) { 1317 error = EINVAL; 1318 goto out; 1319 } 1320 if ((tp->t_oobflags & TCPOOB_HAVEDATA) == 0) { 1321 error = EWOULDBLOCK; 1322 goto out; 1323 } 1324 m->m_len = 1; 1325 *mtod(m, caddr_t) = tp->t_iobc; 1326 if ((flags & MSG_PEEK) == 0) 1327 tp->t_oobflags ^= (TCPOOB_HAVEDATA | TCPOOB_HADDATA); 1328 1329 out: 1330 TCPDEBUG2(PRU_RCVOOB); 1331 TCP_PROBE2(debug__user, tp, PRU_RCVOOB); 1332 INP_WUNLOCK(inp); 1333 return (error); 1334 } 1335 1336 #ifdef INET 1337 struct pr_usrreqs tcp_usrreqs = { 1338 .pru_abort = tcp_usr_abort, 1339 .pru_accept = tcp_usr_accept, 1340 .pru_attach = tcp_usr_attach, 1341 .pru_bind = tcp_usr_bind, 1342 .pru_connect = tcp_usr_connect, 1343 .pru_control = in_control, 1344 .pru_detach = tcp_usr_detach, 1345 .pru_disconnect = tcp_usr_disconnect, 1346 .pru_listen = tcp_usr_listen, 1347 .pru_peeraddr = in_getpeeraddr, 1348 .pru_rcvd = tcp_usr_rcvd, 1349 .pru_rcvoob = tcp_usr_rcvoob, 1350 .pru_send = tcp_usr_send, 1351 .pru_ready = tcp_usr_ready, 1352 .pru_shutdown = tcp_usr_shutdown, 1353 .pru_sockaddr = in_getsockaddr, 1354 .pru_sosetlabel = in_pcbsosetlabel, 1355 .pru_close = tcp_usr_close, 1356 }; 1357 #endif /* INET */ 1358 1359 #ifdef INET6 1360 struct pr_usrreqs tcp6_usrreqs = { 1361 .pru_abort = tcp_usr_abort, 1362 .pru_accept = tcp6_usr_accept, 1363 .pru_attach = tcp_usr_attach, 1364 .pru_bind = tcp6_usr_bind, 1365 .pru_connect = tcp6_usr_connect, 1366 .pru_control = in6_control, 1367 .pru_detach = tcp_usr_detach, 1368 .pru_disconnect = tcp_usr_disconnect, 1369 .pru_listen = tcp6_usr_listen, 1370 .pru_peeraddr = in6_mapped_peeraddr, 1371 .pru_rcvd = tcp_usr_rcvd, 1372 .pru_rcvoob = tcp_usr_rcvoob, 1373 .pru_send = tcp_usr_send, 1374 .pru_ready = tcp_usr_ready, 1375 .pru_shutdown = tcp_usr_shutdown, 1376 .pru_sockaddr = in6_mapped_sockaddr, 1377 .pru_sosetlabel = in_pcbsosetlabel, 1378 .pru_close = tcp_usr_close, 1379 }; 1380 #endif /* INET6 */ 1381 1382 #ifdef INET 1383 /* 1384 * Common subroutine to open a TCP connection to remote host specified 1385 * by struct sockaddr_in in mbuf *nam. Call in_pcbbind to assign a local 1386 * port number if needed. Call in_pcbconnect_setup to do the routing and 1387 * to choose a local host address (interface). If there is an existing 1388 * incarnation of the same connection in TIME-WAIT state and if the remote 1389 * host was sending CC options and if the connection duration was < MSL, then 1390 * truncate the previous TIME-WAIT state and proceed. 1391 * Initialize connection parameters and enter SYN-SENT state. 1392 */ 1393 static int 1394 tcp_connect(struct tcpcb *tp, struct sockaddr *nam, struct thread *td) 1395 { 1396 struct inpcb *inp = tp->t_inpcb, *oinp; 1397 struct socket *so = inp->inp_socket; 1398 struct in_addr laddr; 1399 u_short lport; 1400 int error; 1401 1402 INP_WLOCK_ASSERT(inp); 1403 INP_HASH_WLOCK(&V_tcbinfo); 1404 1405 if (inp->inp_lport == 0) { 1406 error = in_pcbbind(inp, (struct sockaddr *)0, td->td_ucred); 1407 if (error) 1408 goto out; 1409 } 1410 1411 /* 1412 * Cannot simply call in_pcbconnect, because there might be an 1413 * earlier incarnation of this same connection still in 1414 * TIME_WAIT state, creating an ADDRINUSE error. 1415 */ 1416 laddr = inp->inp_laddr; 1417 lport = inp->inp_lport; 1418 error = in_pcbconnect_setup(inp, nam, &laddr.s_addr, &lport, 1419 &inp->inp_faddr.s_addr, &inp->inp_fport, &oinp, td->td_ucred); 1420 if (error && oinp == NULL) 1421 goto out; 1422 if (oinp) { 1423 error = EADDRINUSE; 1424 goto out; 1425 } 1426 inp->inp_laddr = laddr; 1427 in_pcbrehash(inp); 1428 INP_HASH_WUNLOCK(&V_tcbinfo); 1429 1430 /* 1431 * Compute window scaling to request: 1432 * Scale to fit into sweet spot. See tcp_syncache.c. 1433 * XXX: This should move to tcp_output(). 1434 */ 1435 while (tp->request_r_scale < TCP_MAX_WINSHIFT && 1436 (TCP_MAXWIN << tp->request_r_scale) < sb_max) 1437 tp->request_r_scale++; 1438 1439 soisconnecting(so); 1440 TCPSTAT_INC(tcps_connattempt); 1441 tcp_state_change(tp, TCPS_SYN_SENT); 1442 tp->iss = tcp_new_isn(tp); 1443 tcp_sendseqinit(tp); 1444 1445 return 0; 1446 1447 out: 1448 INP_HASH_WUNLOCK(&V_tcbinfo); 1449 return (error); 1450 } 1451 #endif /* INET */ 1452 1453 #ifdef INET6 1454 static int 1455 tcp6_connect(struct tcpcb *tp, struct sockaddr *nam, struct thread *td) 1456 { 1457 struct inpcb *inp = tp->t_inpcb; 1458 int error; 1459 1460 INP_WLOCK_ASSERT(inp); 1461 INP_HASH_WLOCK(&V_tcbinfo); 1462 1463 if (inp->inp_lport == 0) { 1464 error = in6_pcbbind(inp, (struct sockaddr *)0, td->td_ucred); 1465 if (error) 1466 goto out; 1467 } 1468 error = in6_pcbconnect(inp, nam, td->td_ucred); 1469 if (error != 0) 1470 goto out; 1471 INP_HASH_WUNLOCK(&V_tcbinfo); 1472 1473 /* Compute window scaling to request. */ 1474 while (tp->request_r_scale < TCP_MAX_WINSHIFT && 1475 (TCP_MAXWIN << tp->request_r_scale) < sb_max) 1476 tp->request_r_scale++; 1477 1478 soisconnecting(inp->inp_socket); 1479 TCPSTAT_INC(tcps_connattempt); 1480 tcp_state_change(tp, TCPS_SYN_SENT); 1481 tp->iss = tcp_new_isn(tp); 1482 tcp_sendseqinit(tp); 1483 1484 return 0; 1485 1486 out: 1487 INP_HASH_WUNLOCK(&V_tcbinfo); 1488 return error; 1489 } 1490 #endif /* INET6 */ 1491 1492 /* 1493 * Export TCP internal state information via a struct tcp_info, based on the 1494 * Linux 2.6 API. Not ABI compatible as our constants are mapped differently 1495 * (TCP state machine, etc). We export all information using FreeBSD-native 1496 * constants -- for example, the numeric values for tcpi_state will differ 1497 * from Linux. 1498 */ 1499 static void 1500 tcp_fill_info(struct tcpcb *tp, struct tcp_info *ti) 1501 { 1502 1503 INP_WLOCK_ASSERT(tp->t_inpcb); 1504 bzero(ti, sizeof(*ti)); 1505 1506 ti->tcpi_state = tp->t_state; 1507 if ((tp->t_flags & TF_REQ_TSTMP) && (tp->t_flags & TF_RCVD_TSTMP)) 1508 ti->tcpi_options |= TCPI_OPT_TIMESTAMPS; 1509 if (tp->t_flags & TF_SACK_PERMIT) 1510 ti->tcpi_options |= TCPI_OPT_SACK; 1511 if ((tp->t_flags & TF_REQ_SCALE) && (tp->t_flags & TF_RCVD_SCALE)) { 1512 ti->tcpi_options |= TCPI_OPT_WSCALE; 1513 ti->tcpi_snd_wscale = tp->snd_scale; 1514 ti->tcpi_rcv_wscale = tp->rcv_scale; 1515 } 1516 if (tp->t_flags & TF_ECN_PERMIT) 1517 ti->tcpi_options |= TCPI_OPT_ECN; 1518 1519 ti->tcpi_rto = tp->t_rxtcur * tick; 1520 ti->tcpi_last_data_recv = ((uint32_t)ticks - tp->t_rcvtime) * tick; 1521 ti->tcpi_rtt = ((u_int64_t)tp->t_srtt * tick) >> TCP_RTT_SHIFT; 1522 ti->tcpi_rttvar = ((u_int64_t)tp->t_rttvar * tick) >> TCP_RTTVAR_SHIFT; 1523 1524 ti->tcpi_snd_ssthresh = tp->snd_ssthresh; 1525 ti->tcpi_snd_cwnd = tp->snd_cwnd; 1526 1527 /* 1528 * FreeBSD-specific extension fields for tcp_info. 1529 */ 1530 ti->tcpi_rcv_space = tp->rcv_wnd; 1531 ti->tcpi_rcv_nxt = tp->rcv_nxt; 1532 ti->tcpi_snd_wnd = tp->snd_wnd; 1533 ti->tcpi_snd_bwnd = 0; /* Unused, kept for compat. */ 1534 ti->tcpi_snd_nxt = tp->snd_nxt; 1535 ti->tcpi_snd_mss = tp->t_maxseg; 1536 ti->tcpi_rcv_mss = tp->t_maxseg; 1537 ti->tcpi_snd_rexmitpack = tp->t_sndrexmitpack; 1538 ti->tcpi_rcv_ooopack = tp->t_rcvoopack; 1539 ti->tcpi_snd_zerowin = tp->t_sndzerowin; 1540 #ifdef TCP_OFFLOAD 1541 if (tp->t_flags & TF_TOE) { 1542 ti->tcpi_options |= TCPI_OPT_TOE; 1543 tcp_offload_tcp_info(tp, ti); 1544 } 1545 #endif 1546 } 1547 1548 /* 1549 * tcp_ctloutput() must drop the inpcb lock before performing copyin on 1550 * socket option arguments. When it re-acquires the lock after the copy, it 1551 * has to revalidate that the connection is still valid for the socket 1552 * option. 1553 */ 1554 #define INP_WLOCK_RECHECK_CLEANUP(inp, cleanup) do { \ 1555 INP_WLOCK(inp); \ 1556 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { \ 1557 INP_WUNLOCK(inp); \ 1558 cleanup; \ 1559 return (ECONNRESET); \ 1560 } \ 1561 tp = intotcpcb(inp); \ 1562 } while(0) 1563 #define INP_WLOCK_RECHECK(inp) INP_WLOCK_RECHECK_CLEANUP((inp), /* noop */) 1564 1565 int 1566 tcp_ctloutput(struct socket *so, struct sockopt *sopt) 1567 { 1568 int error; 1569 struct inpcb *inp; 1570 struct tcpcb *tp; 1571 struct tcp_function_block *blk; 1572 struct tcp_function_set fsn; 1573 1574 error = 0; 1575 inp = sotoinpcb(so); 1576 KASSERT(inp != NULL, ("tcp_ctloutput: inp == NULL")); 1577 INP_WLOCK(inp); 1578 if (sopt->sopt_level != IPPROTO_TCP) { 1579 #ifdef INET6 1580 if (inp->inp_vflag & INP_IPV6PROTO) { 1581 INP_WUNLOCK(inp); 1582 error = ip6_ctloutput(so, sopt); 1583 } 1584 #endif /* INET6 */ 1585 #if defined(INET6) && defined(INET) 1586 else 1587 #endif 1588 #ifdef INET 1589 { 1590 INP_WUNLOCK(inp); 1591 error = ip_ctloutput(so, sopt); 1592 } 1593 #endif 1594 return (error); 1595 } 1596 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 1597 INP_WUNLOCK(inp); 1598 return (ECONNRESET); 1599 } 1600 tp = intotcpcb(inp); 1601 /* 1602 * Protect the TCP option TCP_FUNCTION_BLK so 1603 * that a sub-function can *never* overwrite this. 1604 */ 1605 if ((sopt->sopt_dir == SOPT_SET) && 1606 (sopt->sopt_name == TCP_FUNCTION_BLK)) { 1607 INP_WUNLOCK(inp); 1608 error = sooptcopyin(sopt, &fsn, sizeof fsn, 1609 sizeof fsn); 1610 if (error) 1611 return (error); 1612 INP_WLOCK_RECHECK(inp); 1613 blk = find_and_ref_tcp_functions(&fsn); 1614 if (blk == NULL) { 1615 INP_WUNLOCK(inp); 1616 return (ENOENT); 1617 } 1618 if (tp->t_fb == blk) { 1619 /* You already have this */ 1620 refcount_release(&blk->tfb_refcnt); 1621 INP_WUNLOCK(inp); 1622 return (0); 1623 } 1624 if (tp->t_state != TCPS_CLOSED) { 1625 int error=EINVAL; 1626 /* 1627 * The user has advanced the state 1628 * past the initial point, we may not 1629 * be able to switch. 1630 */ 1631 if (blk->tfb_tcp_handoff_ok != NULL) { 1632 /* 1633 * Does the stack provide a 1634 * query mechanism, if so it may 1635 * still be possible? 1636 */ 1637 error = (*blk->tfb_tcp_handoff_ok)(tp); 1638 } 1639 if (error) { 1640 refcount_release(&blk->tfb_refcnt); 1641 INP_WUNLOCK(inp); 1642 return(error); 1643 } 1644 } 1645 if (blk->tfb_flags & TCP_FUNC_BEING_REMOVED) { 1646 refcount_release(&blk->tfb_refcnt); 1647 INP_WUNLOCK(inp); 1648 return (ENOENT); 1649 } 1650 /* 1651 * Release the old refcnt, the 1652 * lookup acquired a ref on the 1653 * new one already. 1654 */ 1655 if (tp->t_fb->tfb_tcp_fb_fini) { 1656 /* 1657 * Tell the stack to cleanup with 0 i.e. 1658 * the tcb is not going away. 1659 */ 1660 (*tp->t_fb->tfb_tcp_fb_fini)(tp, 0); 1661 } 1662 #ifdef TCPHPTS 1663 /* Assure that we are not on any hpts */ 1664 tcp_hpts_remove(tp->t_inpcb, HPTS_REMOVE_ALL); 1665 #endif 1666 if (blk->tfb_tcp_fb_init) { 1667 error = (*blk->tfb_tcp_fb_init)(tp); 1668 if (error) { 1669 refcount_release(&blk->tfb_refcnt); 1670 if (tp->t_fb->tfb_tcp_fb_init) { 1671 if((*tp->t_fb->tfb_tcp_fb_init)(tp) != 0) { 1672 /* Fall back failed, drop the connection */ 1673 INP_WUNLOCK(inp); 1674 soabort(so); 1675 return(error); 1676 } 1677 } 1678 goto err_out; 1679 } 1680 } 1681 refcount_release(&tp->t_fb->tfb_refcnt); 1682 tp->t_fb = blk; 1683 #ifdef TCP_OFFLOAD 1684 if (tp->t_flags & TF_TOE) { 1685 tcp_offload_ctloutput(tp, sopt->sopt_dir, 1686 sopt->sopt_name); 1687 } 1688 #endif 1689 err_out: 1690 INP_WUNLOCK(inp); 1691 return (error); 1692 } else if ((sopt->sopt_dir == SOPT_GET) && 1693 (sopt->sopt_name == TCP_FUNCTION_BLK)) { 1694 strncpy(fsn.function_set_name, tp->t_fb->tfb_tcp_block_name, 1695 TCP_FUNCTION_NAME_LEN_MAX); 1696 fsn.function_set_name[TCP_FUNCTION_NAME_LEN_MAX - 1] = '\0'; 1697 fsn.pcbcnt = tp->t_fb->tfb_refcnt; 1698 INP_WUNLOCK(inp); 1699 error = sooptcopyout(sopt, &fsn, sizeof fsn); 1700 return (error); 1701 } 1702 /* Pass in the INP locked, called must unlock it */ 1703 return (tp->t_fb->tfb_tcp_ctloutput(so, sopt, inp, tp)); 1704 } 1705 1706 /* 1707 * If this assert becomes untrue, we need to change the size of the buf 1708 * variable in tcp_default_ctloutput(). 1709 */ 1710 #ifdef CTASSERT 1711 CTASSERT(TCP_CA_NAME_MAX <= TCP_LOG_ID_LEN); 1712 CTASSERT(TCP_LOG_REASON_LEN <= TCP_LOG_ID_LEN); 1713 #endif 1714 1715 int 1716 tcp_default_ctloutput(struct socket *so, struct sockopt *sopt, struct inpcb *inp, struct tcpcb *tp) 1717 { 1718 int error, opt, optval; 1719 u_int ui; 1720 struct tcp_info ti; 1721 struct cc_algo *algo; 1722 char *pbuf, buf[TCP_LOG_ID_LEN]; 1723 size_t len; 1724 1725 /* 1726 * For TCP_CCALGOOPT forward the control to CC module, for both 1727 * SOPT_SET and SOPT_GET. 1728 */ 1729 switch (sopt->sopt_name) { 1730 case TCP_CCALGOOPT: 1731 INP_WUNLOCK(inp); 1732 pbuf = malloc(sopt->sopt_valsize, M_TEMP, M_WAITOK | M_ZERO); 1733 error = sooptcopyin(sopt, pbuf, sopt->sopt_valsize, 1734 sopt->sopt_valsize); 1735 if (error) { 1736 free(pbuf, M_TEMP); 1737 return (error); 1738 } 1739 INP_WLOCK_RECHECK_CLEANUP(inp, free(pbuf, M_TEMP)); 1740 if (CC_ALGO(tp)->ctl_output != NULL) 1741 error = CC_ALGO(tp)->ctl_output(tp->ccv, sopt, pbuf); 1742 else 1743 error = ENOENT; 1744 INP_WUNLOCK(inp); 1745 if (error == 0 && sopt->sopt_dir == SOPT_GET) 1746 error = sooptcopyout(sopt, pbuf, sopt->sopt_valsize); 1747 free(pbuf, M_TEMP); 1748 return (error); 1749 } 1750 1751 switch (sopt->sopt_dir) { 1752 case SOPT_SET: 1753 switch (sopt->sopt_name) { 1754 #if defined(IPSEC_SUPPORT) || defined(TCP_SIGNATURE) 1755 case TCP_MD5SIG: 1756 if (!TCPMD5_ENABLED()) { 1757 INP_WUNLOCK(inp); 1758 return (ENOPROTOOPT); 1759 } 1760 error = TCPMD5_PCBCTL(inp, sopt); 1761 if (error) 1762 return (error); 1763 goto unlock_and_done; 1764 #endif /* IPSEC */ 1765 1766 case TCP_NODELAY: 1767 case TCP_NOOPT: 1768 INP_WUNLOCK(inp); 1769 error = sooptcopyin(sopt, &optval, sizeof optval, 1770 sizeof optval); 1771 if (error) 1772 return (error); 1773 1774 INP_WLOCK_RECHECK(inp); 1775 switch (sopt->sopt_name) { 1776 case TCP_NODELAY: 1777 opt = TF_NODELAY; 1778 break; 1779 case TCP_NOOPT: 1780 opt = TF_NOOPT; 1781 break; 1782 default: 1783 opt = 0; /* dead code to fool gcc */ 1784 break; 1785 } 1786 1787 if (optval) 1788 tp->t_flags |= opt; 1789 else 1790 tp->t_flags &= ~opt; 1791 unlock_and_done: 1792 #ifdef TCP_OFFLOAD 1793 if (tp->t_flags & TF_TOE) { 1794 tcp_offload_ctloutput(tp, sopt->sopt_dir, 1795 sopt->sopt_name); 1796 } 1797 #endif 1798 INP_WUNLOCK(inp); 1799 break; 1800 1801 case TCP_NOPUSH: 1802 INP_WUNLOCK(inp); 1803 error = sooptcopyin(sopt, &optval, sizeof optval, 1804 sizeof optval); 1805 if (error) 1806 return (error); 1807 1808 INP_WLOCK_RECHECK(inp); 1809 if (optval) 1810 tp->t_flags |= TF_NOPUSH; 1811 else if (tp->t_flags & TF_NOPUSH) { 1812 tp->t_flags &= ~TF_NOPUSH; 1813 if (TCPS_HAVEESTABLISHED(tp->t_state)) 1814 error = tp->t_fb->tfb_tcp_output(tp); 1815 } 1816 goto unlock_and_done; 1817 1818 case TCP_MAXSEG: 1819 INP_WUNLOCK(inp); 1820 error = sooptcopyin(sopt, &optval, sizeof optval, 1821 sizeof optval); 1822 if (error) 1823 return (error); 1824 1825 INP_WLOCK_RECHECK(inp); 1826 if (optval > 0 && optval <= tp->t_maxseg && 1827 optval + 40 >= V_tcp_minmss) 1828 tp->t_maxseg = optval; 1829 else 1830 error = EINVAL; 1831 goto unlock_and_done; 1832 1833 case TCP_INFO: 1834 INP_WUNLOCK(inp); 1835 error = EINVAL; 1836 break; 1837 1838 case TCP_CONGESTION: 1839 INP_WUNLOCK(inp); 1840 error = sooptcopyin(sopt, buf, TCP_CA_NAME_MAX - 1, 1); 1841 if (error) 1842 break; 1843 buf[sopt->sopt_valsize] = '\0'; 1844 INP_WLOCK_RECHECK(inp); 1845 CC_LIST_RLOCK(); 1846 STAILQ_FOREACH(algo, &cc_list, entries) 1847 if (strncmp(buf, algo->name, 1848 TCP_CA_NAME_MAX) == 0) 1849 break; 1850 CC_LIST_RUNLOCK(); 1851 if (algo == NULL) { 1852 INP_WUNLOCK(inp); 1853 error = EINVAL; 1854 break; 1855 } 1856 /* 1857 * We hold a write lock over the tcb so it's safe to 1858 * do these things without ordering concerns. 1859 */ 1860 if (CC_ALGO(tp)->cb_destroy != NULL) 1861 CC_ALGO(tp)->cb_destroy(tp->ccv); 1862 CC_DATA(tp) = NULL; 1863 CC_ALGO(tp) = algo; 1864 /* 1865 * If something goes pear shaped initialising the new 1866 * algo, fall back to newreno (which does not 1867 * require initialisation). 1868 */ 1869 if (algo->cb_init != NULL && 1870 algo->cb_init(tp->ccv) != 0) { 1871 CC_ALGO(tp) = &newreno_cc_algo; 1872 /* 1873 * The only reason init should fail is 1874 * because of malloc. 1875 */ 1876 error = ENOMEM; 1877 } 1878 INP_WUNLOCK(inp); 1879 break; 1880 1881 case TCP_KEEPIDLE: 1882 case TCP_KEEPINTVL: 1883 case TCP_KEEPINIT: 1884 INP_WUNLOCK(inp); 1885 error = sooptcopyin(sopt, &ui, sizeof(ui), sizeof(ui)); 1886 if (error) 1887 return (error); 1888 1889 if (ui > (UINT_MAX / hz)) { 1890 error = EINVAL; 1891 break; 1892 } 1893 ui *= hz; 1894 1895 INP_WLOCK_RECHECK(inp); 1896 switch (sopt->sopt_name) { 1897 case TCP_KEEPIDLE: 1898 tp->t_keepidle = ui; 1899 /* 1900 * XXX: better check current remaining 1901 * timeout and "merge" it with new value. 1902 */ 1903 if ((tp->t_state > TCPS_LISTEN) && 1904 (tp->t_state <= TCPS_CLOSING)) 1905 tcp_timer_activate(tp, TT_KEEP, 1906 TP_KEEPIDLE(tp)); 1907 break; 1908 case TCP_KEEPINTVL: 1909 tp->t_keepintvl = ui; 1910 if ((tp->t_state == TCPS_FIN_WAIT_2) && 1911 (TP_MAXIDLE(tp) > 0)) 1912 tcp_timer_activate(tp, TT_2MSL, 1913 TP_MAXIDLE(tp)); 1914 break; 1915 case TCP_KEEPINIT: 1916 tp->t_keepinit = ui; 1917 if (tp->t_state == TCPS_SYN_RECEIVED || 1918 tp->t_state == TCPS_SYN_SENT) 1919 tcp_timer_activate(tp, TT_KEEP, 1920 TP_KEEPINIT(tp)); 1921 break; 1922 } 1923 goto unlock_and_done; 1924 1925 case TCP_KEEPCNT: 1926 INP_WUNLOCK(inp); 1927 error = sooptcopyin(sopt, &ui, sizeof(ui), sizeof(ui)); 1928 if (error) 1929 return (error); 1930 1931 INP_WLOCK_RECHECK(inp); 1932 tp->t_keepcnt = ui; 1933 if ((tp->t_state == TCPS_FIN_WAIT_2) && 1934 (TP_MAXIDLE(tp) > 0)) 1935 tcp_timer_activate(tp, TT_2MSL, 1936 TP_MAXIDLE(tp)); 1937 goto unlock_and_done; 1938 1939 #ifdef TCPPCAP 1940 case TCP_PCAP_OUT: 1941 case TCP_PCAP_IN: 1942 INP_WUNLOCK(inp); 1943 error = sooptcopyin(sopt, &optval, sizeof optval, 1944 sizeof optval); 1945 if (error) 1946 return (error); 1947 1948 INP_WLOCK_RECHECK(inp); 1949 if (optval >= 0) 1950 tcp_pcap_set_sock_max(TCP_PCAP_OUT ? 1951 &(tp->t_outpkts) : &(tp->t_inpkts), 1952 optval); 1953 else 1954 error = EINVAL; 1955 goto unlock_and_done; 1956 #endif 1957 1958 case TCP_FASTOPEN: { 1959 struct tcp_fastopen tfo_optval; 1960 1961 INP_WUNLOCK(inp); 1962 if (!V_tcp_fastopen_client_enable && 1963 !V_tcp_fastopen_server_enable) 1964 return (EPERM); 1965 1966 error = sooptcopyin(sopt, &tfo_optval, 1967 sizeof(tfo_optval), sizeof(int)); 1968 if (error) 1969 return (error); 1970 1971 INP_WLOCK_RECHECK(inp); 1972 if (tfo_optval.enable) { 1973 if (tp->t_state == TCPS_LISTEN) { 1974 if (!V_tcp_fastopen_server_enable) { 1975 error = EPERM; 1976 goto unlock_and_done; 1977 } 1978 1979 tp->t_flags |= TF_FASTOPEN; 1980 if (tp->t_tfo_pending == NULL) 1981 tp->t_tfo_pending = 1982 tcp_fastopen_alloc_counter(); 1983 } else { 1984 /* 1985 * If a pre-shared key was provided, 1986 * stash it in the client cookie 1987 * field of the tcpcb for use during 1988 * connect. 1989 */ 1990 if (sopt->sopt_valsize == 1991 sizeof(tfo_optval)) { 1992 memcpy(tp->t_tfo_cookie.client, 1993 tfo_optval.psk, 1994 TCP_FASTOPEN_PSK_LEN); 1995 tp->t_tfo_client_cookie_len = 1996 TCP_FASTOPEN_PSK_LEN; 1997 } 1998 tp->t_flags |= TF_FASTOPEN; 1999 } 2000 } else 2001 tp->t_flags &= ~TF_FASTOPEN; 2002 goto unlock_and_done; 2003 } 2004 2005 #ifdef TCP_BLACKBOX 2006 case TCP_LOG: 2007 INP_WUNLOCK(inp); 2008 error = sooptcopyin(sopt, &optval, sizeof optval, 2009 sizeof optval); 2010 if (error) 2011 return (error); 2012 2013 INP_WLOCK_RECHECK(inp); 2014 error = tcp_log_state_change(tp, optval); 2015 goto unlock_and_done; 2016 2017 case TCP_LOGBUF: 2018 INP_WUNLOCK(inp); 2019 error = EINVAL; 2020 break; 2021 2022 case TCP_LOGID: 2023 INP_WUNLOCK(inp); 2024 error = sooptcopyin(sopt, buf, TCP_LOG_ID_LEN - 1, 0); 2025 if (error) 2026 break; 2027 buf[sopt->sopt_valsize] = '\0'; 2028 INP_WLOCK_RECHECK(inp); 2029 error = tcp_log_set_id(tp, buf); 2030 /* tcp_log_set_id() unlocks the INP. */ 2031 break; 2032 2033 case TCP_LOGDUMP: 2034 case TCP_LOGDUMPID: 2035 INP_WUNLOCK(inp); 2036 error = 2037 sooptcopyin(sopt, buf, TCP_LOG_REASON_LEN - 1, 0); 2038 if (error) 2039 break; 2040 buf[sopt->sopt_valsize] = '\0'; 2041 INP_WLOCK_RECHECK(inp); 2042 if (sopt->sopt_name == TCP_LOGDUMP) { 2043 error = tcp_log_dump_tp_logbuf(tp, buf, 2044 M_WAITOK, true); 2045 INP_WUNLOCK(inp); 2046 } else { 2047 tcp_log_dump_tp_bucket_logbufs(tp, buf); 2048 /* 2049 * tcp_log_dump_tp_bucket_logbufs() drops the 2050 * INP lock. 2051 */ 2052 } 2053 break; 2054 #endif 2055 2056 default: 2057 INP_WUNLOCK(inp); 2058 error = ENOPROTOOPT; 2059 break; 2060 } 2061 break; 2062 2063 case SOPT_GET: 2064 tp = intotcpcb(inp); 2065 switch (sopt->sopt_name) { 2066 #if defined(IPSEC_SUPPORT) || defined(TCP_SIGNATURE) 2067 case TCP_MD5SIG: 2068 if (!TCPMD5_ENABLED()) { 2069 INP_WUNLOCK(inp); 2070 return (ENOPROTOOPT); 2071 } 2072 error = TCPMD5_PCBCTL(inp, sopt); 2073 break; 2074 #endif 2075 2076 case TCP_NODELAY: 2077 optval = tp->t_flags & TF_NODELAY; 2078 INP_WUNLOCK(inp); 2079 error = sooptcopyout(sopt, &optval, sizeof optval); 2080 break; 2081 case TCP_MAXSEG: 2082 optval = tp->t_maxseg; 2083 INP_WUNLOCK(inp); 2084 error = sooptcopyout(sopt, &optval, sizeof optval); 2085 break; 2086 case TCP_NOOPT: 2087 optval = tp->t_flags & TF_NOOPT; 2088 INP_WUNLOCK(inp); 2089 error = sooptcopyout(sopt, &optval, sizeof optval); 2090 break; 2091 case TCP_NOPUSH: 2092 optval = tp->t_flags & TF_NOPUSH; 2093 INP_WUNLOCK(inp); 2094 error = sooptcopyout(sopt, &optval, sizeof optval); 2095 break; 2096 case TCP_INFO: 2097 tcp_fill_info(tp, &ti); 2098 INP_WUNLOCK(inp); 2099 error = sooptcopyout(sopt, &ti, sizeof ti); 2100 break; 2101 case TCP_CONGESTION: 2102 len = strlcpy(buf, CC_ALGO(tp)->name, TCP_CA_NAME_MAX); 2103 INP_WUNLOCK(inp); 2104 error = sooptcopyout(sopt, buf, len + 1); 2105 break; 2106 case TCP_KEEPIDLE: 2107 case TCP_KEEPINTVL: 2108 case TCP_KEEPINIT: 2109 case TCP_KEEPCNT: 2110 switch (sopt->sopt_name) { 2111 case TCP_KEEPIDLE: 2112 ui = TP_KEEPIDLE(tp) / hz; 2113 break; 2114 case TCP_KEEPINTVL: 2115 ui = TP_KEEPINTVL(tp) / hz; 2116 break; 2117 case TCP_KEEPINIT: 2118 ui = TP_KEEPINIT(tp) / hz; 2119 break; 2120 case TCP_KEEPCNT: 2121 ui = TP_KEEPCNT(tp); 2122 break; 2123 } 2124 INP_WUNLOCK(inp); 2125 error = sooptcopyout(sopt, &ui, sizeof(ui)); 2126 break; 2127 #ifdef TCPPCAP 2128 case TCP_PCAP_OUT: 2129 case TCP_PCAP_IN: 2130 optval = tcp_pcap_get_sock_max(TCP_PCAP_OUT ? 2131 &(tp->t_outpkts) : &(tp->t_inpkts)); 2132 INP_WUNLOCK(inp); 2133 error = sooptcopyout(sopt, &optval, sizeof optval); 2134 break; 2135 #endif 2136 case TCP_FASTOPEN: 2137 optval = tp->t_flags & TF_FASTOPEN; 2138 INP_WUNLOCK(inp); 2139 error = sooptcopyout(sopt, &optval, sizeof optval); 2140 break; 2141 #ifdef TCP_BLACKBOX 2142 case TCP_LOG: 2143 optval = tp->t_logstate; 2144 INP_WUNLOCK(inp); 2145 error = sooptcopyout(sopt, &optval, sizeof(optval)); 2146 break; 2147 case TCP_LOGBUF: 2148 /* tcp_log_getlogbuf() does INP_WUNLOCK(inp) */ 2149 error = tcp_log_getlogbuf(sopt, tp); 2150 break; 2151 case TCP_LOGID: 2152 len = tcp_log_get_id(tp, buf); 2153 INP_WUNLOCK(inp); 2154 error = sooptcopyout(sopt, buf, len + 1); 2155 break; 2156 case TCP_LOGDUMP: 2157 case TCP_LOGDUMPID: 2158 INP_WUNLOCK(inp); 2159 error = EINVAL; 2160 break; 2161 #endif 2162 default: 2163 INP_WUNLOCK(inp); 2164 error = ENOPROTOOPT; 2165 break; 2166 } 2167 break; 2168 } 2169 return (error); 2170 } 2171 #undef INP_WLOCK_RECHECK 2172 #undef INP_WLOCK_RECHECK_CLEANUP 2173 2174 /* 2175 * Attach TCP protocol to socket, allocating 2176 * internet protocol control block, tcp control block, 2177 * bufer space, and entering LISTEN state if to accept connections. 2178 */ 2179 static int 2180 tcp_attach(struct socket *so) 2181 { 2182 struct tcpcb *tp; 2183 struct inpcb *inp; 2184 struct epoch_tracker et; 2185 int error; 2186 2187 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 2188 error = soreserve(so, V_tcp_sendspace, V_tcp_recvspace); 2189 if (error) 2190 return (error); 2191 } 2192 so->so_rcv.sb_flags |= SB_AUTOSIZE; 2193 so->so_snd.sb_flags |= SB_AUTOSIZE; 2194 INP_INFO_RLOCK_ET(&V_tcbinfo, et); 2195 error = in_pcballoc(so, &V_tcbinfo); 2196 if (error) { 2197 INP_INFO_RUNLOCK_ET(&V_tcbinfo, et); 2198 return (error); 2199 } 2200 inp = sotoinpcb(so); 2201 #ifdef INET6 2202 if (inp->inp_vflag & INP_IPV6PROTO) { 2203 inp->inp_vflag |= INP_IPV6; 2204 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) 2205 inp->inp_vflag |= INP_IPV4; 2206 inp->in6p_hops = -1; /* use kernel default */ 2207 } 2208 else 2209 #endif 2210 inp->inp_vflag |= INP_IPV4; 2211 tp = tcp_newtcpcb(inp); 2212 if (tp == NULL) { 2213 in_pcbdetach(inp); 2214 in_pcbfree(inp); 2215 INP_INFO_RUNLOCK_ET(&V_tcbinfo, et); 2216 return (ENOBUFS); 2217 } 2218 tp->t_state = TCPS_CLOSED; 2219 INP_WUNLOCK(inp); 2220 INP_INFO_RUNLOCK_ET(&V_tcbinfo, et); 2221 TCPSTATES_INC(TCPS_CLOSED); 2222 return (0); 2223 } 2224 2225 /* 2226 * Initiate (or continue) disconnect. 2227 * If embryonic state, just send reset (once). 2228 * If in ``let data drain'' option and linger null, just drop. 2229 * Otherwise (hard), mark socket disconnecting and drop 2230 * current input data; switch states based on user close, and 2231 * send segment to peer (with FIN). 2232 */ 2233 static void 2234 tcp_disconnect(struct tcpcb *tp) 2235 { 2236 struct inpcb *inp = tp->t_inpcb; 2237 struct socket *so = inp->inp_socket; 2238 2239 INP_INFO_RLOCK_ASSERT(&V_tcbinfo); 2240 INP_WLOCK_ASSERT(inp); 2241 2242 /* 2243 * Neither tcp_close() nor tcp_drop() should return NULL, as the 2244 * socket is still open. 2245 */ 2246 if (tp->t_state < TCPS_ESTABLISHED && 2247 !(tp->t_state > TCPS_LISTEN && IS_FASTOPEN(tp->t_flags))) { 2248 tp = tcp_close(tp); 2249 KASSERT(tp != NULL, 2250 ("tcp_disconnect: tcp_close() returned NULL")); 2251 } else if ((so->so_options & SO_LINGER) && so->so_linger == 0) { 2252 tp = tcp_drop(tp, 0); 2253 KASSERT(tp != NULL, 2254 ("tcp_disconnect: tcp_drop() returned NULL")); 2255 } else { 2256 soisdisconnecting(so); 2257 sbflush(&so->so_rcv); 2258 tcp_usrclosed(tp); 2259 if (!(inp->inp_flags & INP_DROPPED)) 2260 tp->t_fb->tfb_tcp_output(tp); 2261 } 2262 } 2263 2264 /* 2265 * User issued close, and wish to trail through shutdown states: 2266 * if never received SYN, just forget it. If got a SYN from peer, 2267 * but haven't sent FIN, then go to FIN_WAIT_1 state to send peer a FIN. 2268 * If already got a FIN from peer, then almost done; go to LAST_ACK 2269 * state. In all other cases, have already sent FIN to peer (e.g. 2270 * after PRU_SHUTDOWN), and just have to play tedious game waiting 2271 * for peer to send FIN or not respond to keep-alives, etc. 2272 * We can let the user exit from the close as soon as the FIN is acked. 2273 */ 2274 static void 2275 tcp_usrclosed(struct tcpcb *tp) 2276 { 2277 2278 INP_INFO_RLOCK_ASSERT(&V_tcbinfo); 2279 INP_WLOCK_ASSERT(tp->t_inpcb); 2280 2281 switch (tp->t_state) { 2282 case TCPS_LISTEN: 2283 #ifdef TCP_OFFLOAD 2284 tcp_offload_listen_stop(tp); 2285 #endif 2286 tcp_state_change(tp, TCPS_CLOSED); 2287 /* FALLTHROUGH */ 2288 case TCPS_CLOSED: 2289 tp = tcp_close(tp); 2290 /* 2291 * tcp_close() should never return NULL here as the socket is 2292 * still open. 2293 */ 2294 KASSERT(tp != NULL, 2295 ("tcp_usrclosed: tcp_close() returned NULL")); 2296 break; 2297 2298 case TCPS_SYN_SENT: 2299 case TCPS_SYN_RECEIVED: 2300 tp->t_flags |= TF_NEEDFIN; 2301 break; 2302 2303 case TCPS_ESTABLISHED: 2304 tcp_state_change(tp, TCPS_FIN_WAIT_1); 2305 break; 2306 2307 case TCPS_CLOSE_WAIT: 2308 tcp_state_change(tp, TCPS_LAST_ACK); 2309 break; 2310 } 2311 if (tp->t_state >= TCPS_FIN_WAIT_2) { 2312 soisdisconnected(tp->t_inpcb->inp_socket); 2313 /* Prevent the connection hanging in FIN_WAIT_2 forever. */ 2314 if (tp->t_state == TCPS_FIN_WAIT_2) { 2315 int timeout; 2316 2317 timeout = (tcp_fast_finwait2_recycle) ? 2318 tcp_finwait2_timeout : TP_MAXIDLE(tp); 2319 tcp_timer_activate(tp, TT_2MSL, timeout); 2320 } 2321 } 2322 } 2323 2324 #ifdef DDB 2325 static void 2326 db_print_indent(int indent) 2327 { 2328 int i; 2329 2330 for (i = 0; i < indent; i++) 2331 db_printf(" "); 2332 } 2333 2334 static void 2335 db_print_tstate(int t_state) 2336 { 2337 2338 switch (t_state) { 2339 case TCPS_CLOSED: 2340 db_printf("TCPS_CLOSED"); 2341 return; 2342 2343 case TCPS_LISTEN: 2344 db_printf("TCPS_LISTEN"); 2345 return; 2346 2347 case TCPS_SYN_SENT: 2348 db_printf("TCPS_SYN_SENT"); 2349 return; 2350 2351 case TCPS_SYN_RECEIVED: 2352 db_printf("TCPS_SYN_RECEIVED"); 2353 return; 2354 2355 case TCPS_ESTABLISHED: 2356 db_printf("TCPS_ESTABLISHED"); 2357 return; 2358 2359 case TCPS_CLOSE_WAIT: 2360 db_printf("TCPS_CLOSE_WAIT"); 2361 return; 2362 2363 case TCPS_FIN_WAIT_1: 2364 db_printf("TCPS_FIN_WAIT_1"); 2365 return; 2366 2367 case TCPS_CLOSING: 2368 db_printf("TCPS_CLOSING"); 2369 return; 2370 2371 case TCPS_LAST_ACK: 2372 db_printf("TCPS_LAST_ACK"); 2373 return; 2374 2375 case TCPS_FIN_WAIT_2: 2376 db_printf("TCPS_FIN_WAIT_2"); 2377 return; 2378 2379 case TCPS_TIME_WAIT: 2380 db_printf("TCPS_TIME_WAIT"); 2381 return; 2382 2383 default: 2384 db_printf("unknown"); 2385 return; 2386 } 2387 } 2388 2389 static void 2390 db_print_tflags(u_int t_flags) 2391 { 2392 int comma; 2393 2394 comma = 0; 2395 if (t_flags & TF_ACKNOW) { 2396 db_printf("%sTF_ACKNOW", comma ? ", " : ""); 2397 comma = 1; 2398 } 2399 if (t_flags & TF_DELACK) { 2400 db_printf("%sTF_DELACK", comma ? ", " : ""); 2401 comma = 1; 2402 } 2403 if (t_flags & TF_NODELAY) { 2404 db_printf("%sTF_NODELAY", comma ? ", " : ""); 2405 comma = 1; 2406 } 2407 if (t_flags & TF_NOOPT) { 2408 db_printf("%sTF_NOOPT", comma ? ", " : ""); 2409 comma = 1; 2410 } 2411 if (t_flags & TF_SENTFIN) { 2412 db_printf("%sTF_SENTFIN", comma ? ", " : ""); 2413 comma = 1; 2414 } 2415 if (t_flags & TF_REQ_SCALE) { 2416 db_printf("%sTF_REQ_SCALE", comma ? ", " : ""); 2417 comma = 1; 2418 } 2419 if (t_flags & TF_RCVD_SCALE) { 2420 db_printf("%sTF_RECVD_SCALE", comma ? ", " : ""); 2421 comma = 1; 2422 } 2423 if (t_flags & TF_REQ_TSTMP) { 2424 db_printf("%sTF_REQ_TSTMP", comma ? ", " : ""); 2425 comma = 1; 2426 } 2427 if (t_flags & TF_RCVD_TSTMP) { 2428 db_printf("%sTF_RCVD_TSTMP", comma ? ", " : ""); 2429 comma = 1; 2430 } 2431 if (t_flags & TF_SACK_PERMIT) { 2432 db_printf("%sTF_SACK_PERMIT", comma ? ", " : ""); 2433 comma = 1; 2434 } 2435 if (t_flags & TF_NEEDSYN) { 2436 db_printf("%sTF_NEEDSYN", comma ? ", " : ""); 2437 comma = 1; 2438 } 2439 if (t_flags & TF_NEEDFIN) { 2440 db_printf("%sTF_NEEDFIN", comma ? ", " : ""); 2441 comma = 1; 2442 } 2443 if (t_flags & TF_NOPUSH) { 2444 db_printf("%sTF_NOPUSH", comma ? ", " : ""); 2445 comma = 1; 2446 } 2447 if (t_flags & TF_MORETOCOME) { 2448 db_printf("%sTF_MORETOCOME", comma ? ", " : ""); 2449 comma = 1; 2450 } 2451 if (t_flags & TF_LQ_OVERFLOW) { 2452 db_printf("%sTF_LQ_OVERFLOW", comma ? ", " : ""); 2453 comma = 1; 2454 } 2455 if (t_flags & TF_LASTIDLE) { 2456 db_printf("%sTF_LASTIDLE", comma ? ", " : ""); 2457 comma = 1; 2458 } 2459 if (t_flags & TF_RXWIN0SENT) { 2460 db_printf("%sTF_RXWIN0SENT", comma ? ", " : ""); 2461 comma = 1; 2462 } 2463 if (t_flags & TF_FASTRECOVERY) { 2464 db_printf("%sTF_FASTRECOVERY", comma ? ", " : ""); 2465 comma = 1; 2466 } 2467 if (t_flags & TF_CONGRECOVERY) { 2468 db_printf("%sTF_CONGRECOVERY", comma ? ", " : ""); 2469 comma = 1; 2470 } 2471 if (t_flags & TF_WASFRECOVERY) { 2472 db_printf("%sTF_WASFRECOVERY", comma ? ", " : ""); 2473 comma = 1; 2474 } 2475 if (t_flags & TF_SIGNATURE) { 2476 db_printf("%sTF_SIGNATURE", comma ? ", " : ""); 2477 comma = 1; 2478 } 2479 if (t_flags & TF_FORCEDATA) { 2480 db_printf("%sTF_FORCEDATA", comma ? ", " : ""); 2481 comma = 1; 2482 } 2483 if (t_flags & TF_TSO) { 2484 db_printf("%sTF_TSO", comma ? ", " : ""); 2485 comma = 1; 2486 } 2487 if (t_flags & TF_ECN_PERMIT) { 2488 db_printf("%sTF_ECN_PERMIT", comma ? ", " : ""); 2489 comma = 1; 2490 } 2491 if (t_flags & TF_FASTOPEN) { 2492 db_printf("%sTF_FASTOPEN", comma ? ", " : ""); 2493 comma = 1; 2494 } 2495 } 2496 2497 static void 2498 db_print_toobflags(char t_oobflags) 2499 { 2500 int comma; 2501 2502 comma = 0; 2503 if (t_oobflags & TCPOOB_HAVEDATA) { 2504 db_printf("%sTCPOOB_HAVEDATA", comma ? ", " : ""); 2505 comma = 1; 2506 } 2507 if (t_oobflags & TCPOOB_HADDATA) { 2508 db_printf("%sTCPOOB_HADDATA", comma ? ", " : ""); 2509 comma = 1; 2510 } 2511 } 2512 2513 static void 2514 db_print_tcpcb(struct tcpcb *tp, const char *name, int indent) 2515 { 2516 2517 db_print_indent(indent); 2518 db_printf("%s at %p\n", name, tp); 2519 2520 indent += 2; 2521 2522 db_print_indent(indent); 2523 db_printf("t_segq first: %p t_segqlen: %d t_dupacks: %d\n", 2524 LIST_FIRST(&tp->t_segq), tp->t_segqlen, tp->t_dupacks); 2525 2526 db_print_indent(indent); 2527 db_printf("tt_rexmt: %p tt_persist: %p tt_keep: %p\n", 2528 &tp->t_timers->tt_rexmt, &tp->t_timers->tt_persist, &tp->t_timers->tt_keep); 2529 2530 db_print_indent(indent); 2531 db_printf("tt_2msl: %p tt_delack: %p t_inpcb: %p\n", &tp->t_timers->tt_2msl, 2532 &tp->t_timers->tt_delack, tp->t_inpcb); 2533 2534 db_print_indent(indent); 2535 db_printf("t_state: %d (", tp->t_state); 2536 db_print_tstate(tp->t_state); 2537 db_printf(")\n"); 2538 2539 db_print_indent(indent); 2540 db_printf("t_flags: 0x%x (", tp->t_flags); 2541 db_print_tflags(tp->t_flags); 2542 db_printf(")\n"); 2543 2544 db_print_indent(indent); 2545 db_printf("snd_una: 0x%08x snd_max: 0x%08x snd_nxt: x0%08x\n", 2546 tp->snd_una, tp->snd_max, tp->snd_nxt); 2547 2548 db_print_indent(indent); 2549 db_printf("snd_up: 0x%08x snd_wl1: 0x%08x snd_wl2: 0x%08x\n", 2550 tp->snd_up, tp->snd_wl1, tp->snd_wl2); 2551 2552 db_print_indent(indent); 2553 db_printf("iss: 0x%08x irs: 0x%08x rcv_nxt: 0x%08x\n", 2554 tp->iss, tp->irs, tp->rcv_nxt); 2555 2556 db_print_indent(indent); 2557 db_printf("rcv_adv: 0x%08x rcv_wnd: %u rcv_up: 0x%08x\n", 2558 tp->rcv_adv, tp->rcv_wnd, tp->rcv_up); 2559 2560 db_print_indent(indent); 2561 db_printf("snd_wnd: %u snd_cwnd: %u\n", 2562 tp->snd_wnd, tp->snd_cwnd); 2563 2564 db_print_indent(indent); 2565 db_printf("snd_ssthresh: %u snd_recover: " 2566 "0x%08x\n", tp->snd_ssthresh, tp->snd_recover); 2567 2568 db_print_indent(indent); 2569 db_printf("t_rcvtime: %u t_startime: %u\n", 2570 tp->t_rcvtime, tp->t_starttime); 2571 2572 db_print_indent(indent); 2573 db_printf("t_rttime: %u t_rtsq: 0x%08x\n", 2574 tp->t_rtttime, tp->t_rtseq); 2575 2576 db_print_indent(indent); 2577 db_printf("t_rxtcur: %d t_maxseg: %u t_srtt: %d\n", 2578 tp->t_rxtcur, tp->t_maxseg, tp->t_srtt); 2579 2580 db_print_indent(indent); 2581 db_printf("t_rttvar: %d t_rxtshift: %d t_rttmin: %u " 2582 "t_rttbest: %u\n", tp->t_rttvar, tp->t_rxtshift, tp->t_rttmin, 2583 tp->t_rttbest); 2584 2585 db_print_indent(indent); 2586 db_printf("t_rttupdated: %lu max_sndwnd: %u t_softerror: %d\n", 2587 tp->t_rttupdated, tp->max_sndwnd, tp->t_softerror); 2588 2589 db_print_indent(indent); 2590 db_printf("t_oobflags: 0x%x (", tp->t_oobflags); 2591 db_print_toobflags(tp->t_oobflags); 2592 db_printf(") t_iobc: 0x%02x\n", tp->t_iobc); 2593 2594 db_print_indent(indent); 2595 db_printf("snd_scale: %u rcv_scale: %u request_r_scale: %u\n", 2596 tp->snd_scale, tp->rcv_scale, tp->request_r_scale); 2597 2598 db_print_indent(indent); 2599 db_printf("ts_recent: %u ts_recent_age: %u\n", 2600 tp->ts_recent, tp->ts_recent_age); 2601 2602 db_print_indent(indent); 2603 db_printf("ts_offset: %u last_ack_sent: 0x%08x snd_cwnd_prev: " 2604 "%u\n", tp->ts_offset, tp->last_ack_sent, tp->snd_cwnd_prev); 2605 2606 db_print_indent(indent); 2607 db_printf("snd_ssthresh_prev: %u snd_recover_prev: 0x%08x " 2608 "t_badrxtwin: %u\n", tp->snd_ssthresh_prev, 2609 tp->snd_recover_prev, tp->t_badrxtwin); 2610 2611 db_print_indent(indent); 2612 db_printf("snd_numholes: %d snd_holes first: %p\n", 2613 tp->snd_numholes, TAILQ_FIRST(&tp->snd_holes)); 2614 2615 db_print_indent(indent); 2616 db_printf("snd_fack: 0x%08x rcv_numsacks: %d sack_newdata: " 2617 "0x%08x\n", tp->snd_fack, tp->rcv_numsacks, tp->sack_newdata); 2618 2619 /* Skip sackblks, sackhint. */ 2620 2621 db_print_indent(indent); 2622 db_printf("t_rttlow: %d rfbuf_ts: %u rfbuf_cnt: %d\n", 2623 tp->t_rttlow, tp->rfbuf_ts, tp->rfbuf_cnt); 2624 } 2625 2626 DB_SHOW_COMMAND(tcpcb, db_show_tcpcb) 2627 { 2628 struct tcpcb *tp; 2629 2630 if (!have_addr) { 2631 db_printf("usage: show tcpcb <addr>\n"); 2632 return; 2633 } 2634 tp = (struct tcpcb *)addr; 2635 2636 db_print_tcpcb(tp, "tcpcb", 0); 2637 } 2638 #endif 2639