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 38 #include <sys/cdefs.h> 39 #include "opt_ddb.h" 40 #include "opt_inet.h" 41 #include "opt_inet6.h" 42 #include "opt_ipsec.h" 43 #include "opt_kern_tls.h" 44 45 #include <sys/param.h> 46 #include <sys/systm.h> 47 #include <sys/arb.h> 48 #include <sys/limits.h> 49 #include <sys/malloc.h> 50 #include <sys/refcount.h> 51 #include <sys/kernel.h> 52 #include <sys/ktls.h> 53 #include <sys/qmath.h> 54 #include <sys/sysctl.h> 55 #include <sys/mbuf.h> 56 #ifdef INET6 57 #include <sys/domain.h> 58 #endif /* INET6 */ 59 #include <sys/socket.h> 60 #include <sys/socketvar.h> 61 #include <sys/protosw.h> 62 #include <sys/proc.h> 63 #include <sys/jail.h> 64 #include <sys/stats.h> 65 66 #ifdef DDB 67 #include <ddb/ddb.h> 68 #endif 69 70 #include <net/if.h> 71 #include <net/if_var.h> 72 #include <net/route.h> 73 #include <net/vnet.h> 74 75 #include <netinet/in.h> 76 #include <netinet/in_kdtrace.h> 77 #include <netinet/in_pcb.h> 78 #include <netinet/in_systm.h> 79 #include <netinet/in_var.h> 80 #include <netinet/ip.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 TCP_OFFLOAD 102 #include <netinet/tcp_offload.h> 103 #endif 104 #include <netipsec/ipsec_support.h> 105 106 #include <vm/vm.h> 107 #include <vm/vm_param.h> 108 #include <vm/pmap.h> 109 #include <vm/vm_extern.h> 110 #include <vm/vm_map.h> 111 #include <vm/vm_page.h> 112 113 /* 114 * TCP protocol interface to socket abstraction. 115 */ 116 #ifdef INET 117 static int tcp_connect(struct tcpcb *, struct sockaddr_in *, 118 struct thread *td); 119 #endif /* INET */ 120 #ifdef INET6 121 static int tcp6_connect(struct tcpcb *, struct sockaddr_in6 *, 122 struct thread *td); 123 #endif /* INET6 */ 124 static void tcp_disconnect(struct tcpcb *); 125 static void tcp_usrclosed(struct tcpcb *); 126 static void tcp_fill_info(const struct tcpcb *, struct tcp_info *); 127 128 static int tcp_pru_options_support(struct tcpcb *tp, int flags); 129 130 static void 131 tcp_bblog_pru(struct tcpcb *tp, uint32_t pru, int error) 132 { 133 struct tcp_log_buffer *lgb; 134 135 KASSERT(tp != NULL, ("tcp_bblog_pru: tp == NULL")); 136 INP_WLOCK_ASSERT(tptoinpcb(tp)); 137 if (tcp_bblogging_on(tp)) { 138 lgb = tcp_log_event(tp, NULL, NULL, NULL, TCP_LOG_PRU, error, 139 0, NULL, false, NULL, NULL, 0, NULL); 140 } else { 141 lgb = NULL; 142 } 143 if (lgb != NULL) { 144 if (error >= 0) { 145 lgb->tlb_errno = (uint32_t)error; 146 } 147 lgb->tlb_flex1 = pru; 148 } 149 } 150 151 /* 152 * TCP attaches to socket via pru_attach(), reserving space, 153 * and an internet control block. 154 */ 155 static int 156 tcp_usr_attach(struct socket *so, int proto, struct thread *td) 157 { 158 struct inpcb *inp; 159 struct tcpcb *tp = NULL; 160 int error; 161 162 inp = sotoinpcb(so); 163 KASSERT(inp == NULL, ("tcp_usr_attach: inp != NULL")); 164 165 error = soreserve(so, V_tcp_sendspace, V_tcp_recvspace); 166 if (error) 167 goto out; 168 169 so->so_rcv.sb_flags |= SB_AUTOSIZE; 170 so->so_snd.sb_flags |= SB_AUTOSIZE; 171 error = in_pcballoc(so, &V_tcbinfo); 172 if (error) 173 goto out; 174 inp = sotoinpcb(so); 175 tp = tcp_newtcpcb(inp, NULL); 176 if (tp == NULL) { 177 error = ENOBUFS; 178 in_pcbfree(inp); 179 goto out; 180 } 181 tp->t_state = TCPS_CLOSED; 182 tcp_bblog_pru(tp, PRU_ATTACH, error); 183 INP_WUNLOCK(inp); 184 TCPSTATES_INC(TCPS_CLOSED); 185 out: 186 TCP_PROBE2(debug__user, tp, PRU_ATTACH); 187 return (error); 188 } 189 190 /* 191 * tcp_usr_detach is called when the socket layer loses its final reference 192 * to the socket, be it a file descriptor reference, a reference from TCP, 193 * etc. At this point, there is only one case in which we will keep around 194 * inpcb state: time wait. 195 */ 196 static void 197 tcp_usr_detach(struct socket *so) 198 { 199 struct inpcb *inp; 200 struct tcpcb *tp; 201 202 inp = sotoinpcb(so); 203 KASSERT(inp != NULL, ("%s: inp == NULL", __func__)); 204 INP_WLOCK(inp); 205 KASSERT(so->so_pcb == inp && inp->inp_socket == so, 206 ("%s: socket %p inp %p mismatch", __func__, so, inp)); 207 208 tp = intotcpcb(inp); 209 210 KASSERT(inp->inp_flags & INP_DROPPED || 211 tp->t_state < TCPS_SYN_SENT, 212 ("%s: inp %p not dropped or embryonic", __func__, inp)); 213 214 tcp_discardcb(tp); 215 in_pcbfree(inp); 216 } 217 218 #ifdef INET 219 /* 220 * Give the socket an address. 221 */ 222 static int 223 tcp_usr_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 224 { 225 int error = 0; 226 struct inpcb *inp; 227 struct tcpcb *tp; 228 struct sockaddr_in *sinp; 229 230 inp = sotoinpcb(so); 231 KASSERT(inp != NULL, ("tcp_usr_bind: inp == NULL")); 232 INP_WLOCK(inp); 233 if (inp->inp_flags & INP_DROPPED) { 234 INP_WUNLOCK(inp); 235 return (EINVAL); 236 } 237 tp = intotcpcb(inp); 238 239 sinp = (struct sockaddr_in *)nam; 240 if (nam->sa_family != AF_INET) { 241 /* 242 * Preserve compatibility with old programs. 243 */ 244 if (nam->sa_family != AF_UNSPEC || 245 nam->sa_len < offsetof(struct sockaddr_in, sin_zero) || 246 sinp->sin_addr.s_addr != INADDR_ANY) { 247 error = EAFNOSUPPORT; 248 goto out; 249 } 250 nam->sa_family = AF_INET; 251 } 252 if (nam->sa_len != sizeof(*sinp)) { 253 error = EINVAL; 254 goto out; 255 } 256 /* 257 * Must check for multicast addresses and disallow binding 258 * to them. 259 */ 260 if (IN_MULTICAST(ntohl(sinp->sin_addr.s_addr))) { 261 error = EAFNOSUPPORT; 262 goto out; 263 } 264 INP_HASH_WLOCK(&V_tcbinfo); 265 error = in_pcbbind(inp, sinp, V_tcp_bind_all_fibs ? 0 : INPBIND_FIB, 266 td->td_ucred); 267 INP_HASH_WUNLOCK(&V_tcbinfo); 268 out: 269 tcp_bblog_pru(tp, PRU_BIND, error); 270 TCP_PROBE2(debug__user, tp, PRU_BIND); 271 INP_WUNLOCK(inp); 272 273 return (error); 274 } 275 #endif /* INET */ 276 277 #ifdef INET6 278 static int 279 tcp6_usr_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 280 { 281 int error = 0; 282 struct inpcb *inp; 283 struct tcpcb *tp; 284 struct sockaddr_in6 *sin6; 285 u_char vflagsav; 286 287 inp = sotoinpcb(so); 288 KASSERT(inp != NULL, ("tcp6_usr_bind: inp == NULL")); 289 INP_WLOCK(inp); 290 if (inp->inp_flags & INP_DROPPED) { 291 INP_WUNLOCK(inp); 292 return (EINVAL); 293 } 294 tp = intotcpcb(inp); 295 296 vflagsav = inp->inp_vflag; 297 298 sin6 = (struct sockaddr_in6 *)nam; 299 if (nam->sa_family != AF_INET6) { 300 error = EAFNOSUPPORT; 301 goto out; 302 } 303 if (nam->sa_len != sizeof(*sin6)) { 304 error = EINVAL; 305 goto out; 306 } 307 /* 308 * Must check for multicast addresses and disallow binding 309 * to them. 310 */ 311 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 312 error = EAFNOSUPPORT; 313 goto out; 314 } 315 316 INP_HASH_WLOCK(&V_tcbinfo); 317 inp->inp_vflag &= ~INP_IPV4; 318 inp->inp_vflag |= INP_IPV6; 319 #ifdef INET 320 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 321 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 322 inp->inp_vflag |= INP_IPV4; 323 else if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 324 struct sockaddr_in sin; 325 326 in6_sin6_2_sin(&sin, sin6); 327 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 328 error = EAFNOSUPPORT; 329 INP_HASH_WUNLOCK(&V_tcbinfo); 330 goto out; 331 } 332 inp->inp_vflag |= INP_IPV4; 333 inp->inp_vflag &= ~INP_IPV6; 334 error = in_pcbbind(inp, &sin, 0, td->td_ucred); 335 INP_HASH_WUNLOCK(&V_tcbinfo); 336 goto out; 337 } 338 } 339 #endif 340 error = in6_pcbbind(inp, sin6, V_tcp_bind_all_fibs ? 0 : INPBIND_FIB, 341 td->td_ucred); 342 INP_HASH_WUNLOCK(&V_tcbinfo); 343 out: 344 if (error != 0) 345 inp->inp_vflag = vflagsav; 346 tcp_bblog_pru(tp, PRU_BIND, error); 347 TCP_PROBE2(debug__user, tp, PRU_BIND); 348 INP_WUNLOCK(inp); 349 return (error); 350 } 351 #endif /* INET6 */ 352 353 #ifdef INET 354 /* 355 * Prepare to accept connections. 356 */ 357 static int 358 tcp_usr_listen(struct socket *so, int backlog, struct thread *td) 359 { 360 struct inpcb *inp; 361 struct tcpcb *tp; 362 int error = 0; 363 bool already_listening; 364 365 inp = sotoinpcb(so); 366 KASSERT(inp != NULL, ("tcp_usr_listen: inp == NULL")); 367 INP_WLOCK(inp); 368 if (inp->inp_flags & INP_DROPPED) { 369 INP_WUNLOCK(inp); 370 return (EINVAL); 371 } 372 tp = intotcpcb(inp); 373 374 SOCK_LOCK(so); 375 already_listening = SOLISTENING(so); 376 error = solisten_proto_check(so); 377 if (error != 0) { 378 SOCK_UNLOCK(so); 379 goto out; 380 } 381 if (inp->inp_lport == 0) { 382 INP_HASH_WLOCK(&V_tcbinfo); 383 error = in_pcbbind(inp, NULL, 384 V_tcp_bind_all_fibs ? 0 : INPBIND_FIB, td->td_ucred); 385 INP_HASH_WUNLOCK(&V_tcbinfo); 386 } 387 if (error == 0) { 388 tcp_state_change(tp, TCPS_LISTEN); 389 solisten_proto(so, backlog); 390 #ifdef TCP_OFFLOAD 391 if ((so->so_options & SO_NO_OFFLOAD) == 0) 392 tcp_offload_listen_start(tp); 393 #endif 394 } else { 395 solisten_proto_abort(so); 396 } 397 SOCK_UNLOCK(so); 398 if (already_listening) 399 goto out; 400 401 if (error == 0) 402 in_pcblisten(inp); 403 if (tp->t_flags & TF_FASTOPEN) 404 tp->t_tfo_pending = tcp_fastopen_alloc_counter(); 405 406 out: 407 tcp_bblog_pru(tp, PRU_LISTEN, error); 408 TCP_PROBE2(debug__user, tp, PRU_LISTEN); 409 INP_WUNLOCK(inp); 410 return (error); 411 } 412 #endif /* INET */ 413 414 #ifdef INET6 415 static int 416 tcp6_usr_listen(struct socket *so, int backlog, struct thread *td) 417 { 418 struct inpcb *inp; 419 struct tcpcb *tp; 420 u_char vflagsav; 421 int error = 0; 422 bool already_listening; 423 424 inp = sotoinpcb(so); 425 KASSERT(inp != NULL, ("tcp6_usr_listen: inp == NULL")); 426 INP_WLOCK(inp); 427 if (inp->inp_flags & INP_DROPPED) { 428 INP_WUNLOCK(inp); 429 return (EINVAL); 430 } 431 tp = intotcpcb(inp); 432 433 vflagsav = inp->inp_vflag; 434 435 SOCK_LOCK(so); 436 already_listening = SOLISTENING(so); 437 error = solisten_proto_check(so); 438 if (error != 0) { 439 SOCK_UNLOCK(so); 440 goto out; 441 } 442 INP_HASH_WLOCK(&V_tcbinfo); 443 if (inp->inp_lport == 0) { 444 inp->inp_vflag &= ~INP_IPV4; 445 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) 446 inp->inp_vflag |= INP_IPV4; 447 error = in6_pcbbind(inp, NULL, 448 V_tcp_bind_all_fibs ? 0 : INPBIND_FIB, td->td_ucred); 449 } 450 INP_HASH_WUNLOCK(&V_tcbinfo); 451 if (error == 0) { 452 tcp_state_change(tp, TCPS_LISTEN); 453 solisten_proto(so, backlog); 454 #ifdef TCP_OFFLOAD 455 if ((so->so_options & SO_NO_OFFLOAD) == 0) 456 tcp_offload_listen_start(tp); 457 #endif 458 } else { 459 solisten_proto_abort(so); 460 } 461 SOCK_UNLOCK(so); 462 if (already_listening) 463 goto out; 464 465 if (error == 0) 466 in_pcblisten(inp); 467 if (tp->t_flags & TF_FASTOPEN) 468 tp->t_tfo_pending = tcp_fastopen_alloc_counter(); 469 470 if (error != 0) 471 inp->inp_vflag = vflagsav; 472 473 out: 474 tcp_bblog_pru(tp, PRU_LISTEN, error); 475 TCP_PROBE2(debug__user, tp, PRU_LISTEN); 476 INP_WUNLOCK(inp); 477 return (error); 478 } 479 #endif /* INET6 */ 480 481 #ifdef INET 482 /* 483 * Initiate connection to peer. 484 * Create a template for use in transmissions on this connection. 485 * Enter SYN_SENT state, and mark socket as connecting. 486 * Start keep-alive timer, and seed output sequence space. 487 * Send initial segment on connection. 488 */ 489 static int 490 tcp_usr_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 491 { 492 struct epoch_tracker et; 493 int error = 0; 494 struct inpcb *inp; 495 struct tcpcb *tp; 496 struct sockaddr_in *sinp; 497 498 inp = sotoinpcb(so); 499 KASSERT(inp != NULL, ("tcp_usr_connect: inp == NULL")); 500 INP_WLOCK(inp); 501 if (inp->inp_flags & INP_DROPPED) { 502 INP_WUNLOCK(inp); 503 return (ECONNREFUSED); 504 } 505 tp = intotcpcb(inp); 506 507 sinp = (struct sockaddr_in *)nam; 508 if (nam->sa_family != AF_INET) { 509 error = EAFNOSUPPORT; 510 goto out; 511 } 512 if (nam->sa_len != sizeof (*sinp)) { 513 error = EINVAL; 514 goto out; 515 } 516 /* 517 * Must disallow TCP ``connections'' to multicast addresses. 518 */ 519 if (IN_MULTICAST(ntohl(sinp->sin_addr.s_addr))) { 520 error = EAFNOSUPPORT; 521 goto out; 522 } 523 if (ntohl(sinp->sin_addr.s_addr) == INADDR_BROADCAST) { 524 error = EACCES; 525 goto out; 526 } 527 if ((error = prison_remote_ip4(td->td_ucred, &sinp->sin_addr)) != 0) 528 goto out; 529 if (SOLISTENING(so) || so->so_options & SO_REUSEPORT_LB) { 530 error = EOPNOTSUPP; 531 goto out; 532 } 533 NET_EPOCH_ENTER(et); 534 if ((error = tcp_connect(tp, sinp, td)) != 0) 535 goto out_in_epoch; 536 #ifdef TCP_OFFLOAD 537 if (registered_toedevs > 0 && 538 (so->so_options & SO_NO_OFFLOAD) == 0 && 539 (error = tcp_offload_connect(so, nam)) == 0) 540 goto out_in_epoch; 541 #endif 542 tcp_timer_activate(tp, TT_KEEP, TP_KEEPINIT(tp)); 543 error = tcp_output(tp); 544 KASSERT(error >= 0, ("TCP stack %s requested tcp_drop(%p) at connect()" 545 ", error code %d", tp->t_fb->tfb_tcp_block_name, tp, -error)); 546 out_in_epoch: 547 NET_EPOCH_EXIT(et); 548 out: 549 tcp_bblog_pru(tp, PRU_CONNECT, error); 550 TCP_PROBE2(debug__user, tp, PRU_CONNECT); 551 INP_WUNLOCK(inp); 552 return (error); 553 } 554 #endif /* INET */ 555 556 #ifdef INET6 557 static int 558 tcp6_usr_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 559 { 560 struct epoch_tracker et; 561 int error = 0; 562 struct inpcb *inp; 563 struct tcpcb *tp; 564 struct sockaddr_in6 *sin6; 565 u_int8_t incflagsav; 566 u_char vflagsav; 567 568 inp = sotoinpcb(so); 569 KASSERT(inp != NULL, ("tcp6_usr_connect: inp == NULL")); 570 INP_WLOCK(inp); 571 if (inp->inp_flags & INP_DROPPED) { 572 INP_WUNLOCK(inp); 573 return (ECONNREFUSED); 574 } 575 tp = intotcpcb(inp); 576 577 vflagsav = inp->inp_vflag; 578 incflagsav = inp->inp_inc.inc_flags; 579 580 sin6 = (struct sockaddr_in6 *)nam; 581 if (nam->sa_family != AF_INET6) { 582 error = EAFNOSUPPORT; 583 goto out; 584 } 585 if (nam->sa_len != sizeof (*sin6)) { 586 error = EINVAL; 587 goto out; 588 } 589 /* 590 * Must disallow TCP ``connections'' to multicast addresses. 591 */ 592 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 593 error = EAFNOSUPPORT; 594 goto out; 595 } 596 if (SOLISTENING(so) || so->so_options & SO_REUSEPORT_LB) { 597 error = EOPNOTSUPP; 598 goto out; 599 } 600 #ifdef INET 601 /* 602 * XXXRW: Some confusion: V4/V6 flags relate to binding, and 603 * therefore probably require the hash lock, which isn't held here. 604 * Is this a significant problem? 605 */ 606 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 607 struct sockaddr_in sin; 608 609 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0) { 610 error = EINVAL; 611 goto out; 612 } 613 if ((inp->inp_vflag & INP_IPV4) == 0) { 614 error = EAFNOSUPPORT; 615 goto out; 616 } 617 618 in6_sin6_2_sin(&sin, sin6); 619 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 620 error = EAFNOSUPPORT; 621 goto out; 622 } 623 if (ntohl(sin.sin_addr.s_addr) == INADDR_BROADCAST) { 624 error = EACCES; 625 goto out; 626 } 627 if ((error = prison_remote_ip4(td->td_ucred, 628 &sin.sin_addr)) != 0) 629 goto out; 630 inp->inp_vflag |= INP_IPV4; 631 inp->inp_vflag &= ~INP_IPV6; 632 NET_EPOCH_ENTER(et); 633 if ((error = tcp_connect(tp, &sin, td)) != 0) 634 goto out_in_epoch; 635 #ifdef TCP_OFFLOAD 636 if (registered_toedevs > 0 && 637 (so->so_options & SO_NO_OFFLOAD) == 0 && 638 (error = tcp_offload_connect(so, nam)) == 0) 639 goto out_in_epoch; 640 #endif 641 error = tcp_output(tp); 642 goto out_in_epoch; 643 } else { 644 if ((inp->inp_vflag & INP_IPV6) == 0) { 645 error = EAFNOSUPPORT; 646 goto out; 647 } 648 } 649 #endif 650 if ((error = prison_remote_ip6(td->td_ucred, &sin6->sin6_addr)) != 0) 651 goto out; 652 inp->inp_vflag &= ~INP_IPV4; 653 inp->inp_vflag |= INP_IPV6; 654 inp->inp_inc.inc_flags |= INC_ISIPV6; 655 NET_EPOCH_ENTER(et); 656 if ((error = tcp6_connect(tp, sin6, td)) != 0) 657 goto out_in_epoch; 658 #ifdef TCP_OFFLOAD 659 if (registered_toedevs > 0 && 660 (so->so_options & SO_NO_OFFLOAD) == 0 && 661 (error = tcp_offload_connect(so, nam)) == 0) 662 goto out_in_epoch; 663 #endif 664 tcp_timer_activate(tp, TT_KEEP, TP_KEEPINIT(tp)); 665 error = tcp_output(tp); 666 out_in_epoch: 667 NET_EPOCH_EXIT(et); 668 out: 669 KASSERT(error >= 0, ("TCP stack %s requested tcp_drop(%p) at connect()" 670 ", error code %d", tp->t_fb->tfb_tcp_block_name, tp, -error)); 671 /* 672 * If the implicit bind in the connect call fails, restore 673 * the flags we modified. 674 */ 675 if (error != 0 && inp->inp_lport == 0) { 676 inp->inp_vflag = vflagsav; 677 inp->inp_inc.inc_flags = incflagsav; 678 } 679 680 tcp_bblog_pru(tp, PRU_CONNECT, error); 681 TCP_PROBE2(debug__user, tp, PRU_CONNECT); 682 INP_WUNLOCK(inp); 683 return (error); 684 } 685 #endif /* INET6 */ 686 687 /* 688 * Initiate disconnect from peer. 689 * If connection never passed embryonic stage, just drop; 690 * else if don't need to let data drain, then can just drop anyways, 691 * else have to begin TCP shutdown process: mark socket disconnecting, 692 * drain unread data, state switch to reflect user close, and 693 * send segment (e.g. FIN) to peer. Socket will be really disconnected 694 * when peer sends FIN and acks ours. 695 * 696 * SHOULD IMPLEMENT LATER PRU_CONNECT VIA REALLOC TCPCB. 697 */ 698 static int 699 tcp_usr_disconnect(struct socket *so) 700 { 701 struct inpcb *inp; 702 struct tcpcb *tp = NULL; 703 struct epoch_tracker et; 704 705 NET_EPOCH_ENTER(et); 706 inp = sotoinpcb(so); 707 KASSERT(inp != NULL, ("tcp_usr_disconnect: inp == NULL")); 708 INP_WLOCK(inp); 709 tp = intotcpcb(inp); 710 711 if (tp->t_state == TCPS_TIME_WAIT) 712 goto out; 713 tcp_disconnect(tp); 714 out: 715 tcp_bblog_pru(tp, PRU_DISCONNECT, 0); 716 TCP_PROBE2(debug__user, tp, PRU_DISCONNECT); 717 INP_WUNLOCK(inp); 718 NET_EPOCH_EXIT(et); 719 return (0); 720 } 721 722 #ifdef INET 723 /* 724 * Accept a connection. Essentially all the work is done at higher levels; 725 * just return the address of the peer, storing through addr. 726 */ 727 static int 728 tcp_usr_accept(struct socket *so, struct sockaddr *sa) 729 { 730 struct inpcb *inp; 731 struct tcpcb *tp; 732 int error = 0; 733 734 inp = sotoinpcb(so); 735 KASSERT(inp != NULL, ("tcp_usr_accept: inp == NULL")); 736 INP_WLOCK(inp); 737 if (inp->inp_flags & INP_DROPPED) { 738 INP_WUNLOCK(inp); 739 return (ECONNABORTED); 740 } 741 tp = intotcpcb(inp); 742 743 if (so->so_state & SS_ISDISCONNECTED) 744 error = ECONNABORTED; 745 else 746 *(struct sockaddr_in *)sa = (struct sockaddr_in ){ 747 .sin_family = AF_INET, 748 .sin_len = sizeof(struct sockaddr_in), 749 .sin_port = inp->inp_fport, 750 .sin_addr = inp->inp_faddr, 751 }; 752 tcp_bblog_pru(tp, PRU_ACCEPT, error); 753 TCP_PROBE2(debug__user, tp, PRU_ACCEPT); 754 INP_WUNLOCK(inp); 755 756 return (error); 757 } 758 #endif /* INET */ 759 760 #ifdef INET6 761 static int 762 tcp6_usr_accept(struct socket *so, struct sockaddr *sa) 763 { 764 struct inpcb *inp; 765 struct tcpcb *tp; 766 int error = 0; 767 768 inp = sotoinpcb(so); 769 KASSERT(inp != NULL, ("tcp6_usr_accept: inp == NULL")); 770 INP_WLOCK(inp); 771 if (inp->inp_flags & INP_DROPPED) { 772 INP_WUNLOCK(inp); 773 return (ECONNABORTED); 774 } 775 tp = intotcpcb(inp); 776 777 if (so->so_state & SS_ISDISCONNECTED) { 778 error = ECONNABORTED; 779 } else { 780 if (inp->inp_vflag & INP_IPV4) { 781 struct sockaddr_in sin = { 782 .sin_family = AF_INET, 783 .sin_len = sizeof(struct sockaddr_in), 784 .sin_port = inp->inp_fport, 785 .sin_addr = inp->inp_faddr, 786 }; 787 in6_sin_2_v4mapsin6(&sin, (struct sockaddr_in6 *)sa); 788 } else { 789 *(struct sockaddr_in6 *)sa = (struct sockaddr_in6 ){ 790 .sin6_family = AF_INET6, 791 .sin6_len = sizeof(struct sockaddr_in6), 792 .sin6_port = inp->inp_fport, 793 .sin6_addr = inp->in6p_faddr, 794 }; 795 /* XXX: should catch errors */ 796 (void)sa6_recoverscope((struct sockaddr_in6 *)sa); 797 } 798 } 799 800 tcp_bblog_pru(tp, PRU_ACCEPT, error); 801 TCP_PROBE2(debug__user, tp, PRU_ACCEPT); 802 INP_WUNLOCK(inp); 803 804 return (error); 805 } 806 #endif /* INET6 */ 807 808 /* 809 * Mark the connection as being incapable of further output. 810 */ 811 static int 812 tcp_usr_shutdown(struct socket *so, enum shutdown_how how) 813 { 814 struct epoch_tracker et; 815 struct inpcb *inp = sotoinpcb(so); 816 struct tcpcb *tp = intotcpcb(inp); 817 int error = 0; 818 819 SOCK_LOCK(so); 820 if (SOLISTENING(so)) { 821 if (how != SHUT_WR) { 822 so->so_error = ECONNABORTED; 823 solisten_wakeup(so); /* unlocks so */ 824 } else 825 SOCK_UNLOCK(so); 826 return (ENOTCONN); 827 } else if ((so->so_state & 828 (SS_ISCONNECTED | SS_ISCONNECTING | SS_ISDISCONNECTING)) == 0) { 829 SOCK_UNLOCK(so); 830 return (ENOTCONN); 831 } 832 SOCK_UNLOCK(so); 833 834 switch (how) { 835 case SHUT_RD: 836 sorflush(so); 837 break; 838 case SHUT_RDWR: 839 sorflush(so); 840 /* FALLTHROUGH */ 841 case SHUT_WR: 842 /* 843 * XXXGL: mimicing old soshutdown() here. But shouldn't we 844 * return ECONNRESEST for SHUT_RD as well? 845 */ 846 INP_WLOCK(inp); 847 if (inp->inp_flags & INP_DROPPED) { 848 INP_WUNLOCK(inp); 849 return (ECONNRESET); 850 } 851 852 socantsendmore(so); 853 NET_EPOCH_ENTER(et); 854 tcp_usrclosed(tp); 855 error = tcp_output_nodrop(tp); 856 tcp_bblog_pru(tp, PRU_SHUTDOWN, error); 857 TCP_PROBE2(debug__user, tp, PRU_SHUTDOWN); 858 error = tcp_unlock_or_drop(tp, error); 859 NET_EPOCH_EXIT(et); 860 } 861 wakeup(&so->so_timeo); 862 863 return (error); 864 } 865 866 /* 867 * After a receive, possibly send window update to peer. 868 */ 869 static int 870 tcp_usr_rcvd(struct socket *so, int flags) 871 { 872 struct epoch_tracker et; 873 struct inpcb *inp; 874 struct tcpcb *tp; 875 int outrv = 0, error = 0; 876 877 inp = sotoinpcb(so); 878 KASSERT(inp != NULL, ("tcp_usr_rcvd: inp == NULL")); 879 INP_WLOCK(inp); 880 if (inp->inp_flags & INP_DROPPED) { 881 INP_WUNLOCK(inp); 882 return (ECONNRESET); 883 } 884 tp = intotcpcb(inp); 885 886 NET_EPOCH_ENTER(et); 887 /* 888 * For passively-created TFO connections, don't attempt a window 889 * update while still in SYN_RECEIVED as this may trigger an early 890 * SYN|ACK. It is preferable to have the SYN|ACK be sent along with 891 * application response data, or failing that, when the DELACK timer 892 * expires. 893 */ 894 if ((tp->t_flags & TF_FASTOPEN) && (tp->t_state == TCPS_SYN_RECEIVED)) 895 goto out; 896 #ifdef TCP_OFFLOAD 897 if (tp->t_flags & TF_TOE) 898 tcp_offload_rcvd(tp); 899 else 900 #endif 901 outrv = tcp_output_nodrop(tp); 902 out: 903 tcp_bblog_pru(tp, PRU_RCVD, error); 904 TCP_PROBE2(debug__user, tp, PRU_RCVD); 905 (void) tcp_unlock_or_drop(tp, outrv); 906 NET_EPOCH_EXIT(et); 907 return (error); 908 } 909 910 /* 911 * Do a send by putting data in output queue and updating urgent 912 * marker if URG set. Possibly send more data. Unlike the other 913 * pru_*() routines, the mbuf chains are our responsibility. We 914 * must either enqueue them or free them. The other pru_* routines 915 * generally are caller-frees. 916 */ 917 static int 918 tcp_usr_send(struct socket *so, int flags, struct mbuf *m, 919 struct sockaddr *nam, struct mbuf *control, struct thread *td) 920 { 921 struct epoch_tracker et; 922 int error = 0; 923 struct inpcb *inp; 924 struct tcpcb *tp; 925 #ifdef INET 926 #ifdef INET6 927 struct sockaddr_in sin; 928 #endif 929 struct sockaddr_in *sinp; 930 #endif 931 #ifdef INET6 932 struct sockaddr_in6 *sin6; 933 int isipv6; 934 #endif 935 u_int8_t incflagsav; 936 u_char vflagsav; 937 bool restoreflags; 938 939 inp = sotoinpcb(so); 940 KASSERT(inp != NULL, ("tcp_usr_send: inp == NULL")); 941 INP_WLOCK(inp); 942 if (inp->inp_flags & INP_DROPPED) { 943 if (m != NULL && (flags & PRUS_NOTREADY) == 0) 944 m_freem(m); 945 INP_WUNLOCK(inp); 946 return (ECONNRESET); 947 } 948 tp = intotcpcb(inp); 949 950 vflagsav = inp->inp_vflag; 951 incflagsav = inp->inp_inc.inc_flags; 952 restoreflags = false; 953 954 NET_EPOCH_ENTER(et); 955 if (control != NULL) { 956 /* TCP doesn't do control messages (rights, creds, etc) */ 957 if (control->m_len > 0) { 958 m_freem(control); 959 error = EINVAL; 960 goto out; 961 } 962 m_freem(control); /* empty control, just free it */ 963 } 964 965 if ((flags & PRUS_OOB) != 0 && 966 (error = tcp_pru_options_support(tp, PRUS_OOB)) != 0) 967 goto out; 968 969 if (nam != NULL && tp->t_state < TCPS_SYN_SENT) { 970 if (tp->t_state == TCPS_LISTEN) { 971 error = EINVAL; 972 goto out; 973 } 974 switch (nam->sa_family) { 975 #ifdef INET 976 case AF_INET: 977 sinp = (struct sockaddr_in *)nam; 978 if (sinp->sin_len != sizeof(struct sockaddr_in)) { 979 error = EINVAL; 980 goto out; 981 } 982 if ((inp->inp_vflag & INP_IPV6) != 0) { 983 error = EAFNOSUPPORT; 984 goto out; 985 } 986 if (IN_MULTICAST(ntohl(sinp->sin_addr.s_addr))) { 987 error = EAFNOSUPPORT; 988 goto out; 989 } 990 if (ntohl(sinp->sin_addr.s_addr) == INADDR_BROADCAST) { 991 error = EACCES; 992 goto out; 993 } 994 if ((error = prison_remote_ip4(td->td_ucred, 995 &sinp->sin_addr))) 996 goto out; 997 #ifdef INET6 998 isipv6 = 0; 999 #endif 1000 break; 1001 #endif /* INET */ 1002 #ifdef INET6 1003 case AF_INET6: 1004 sin6 = (struct sockaddr_in6 *)nam; 1005 if (sin6->sin6_len != sizeof(*sin6)) { 1006 error = EINVAL; 1007 goto out; 1008 } 1009 if ((inp->inp_vflag & INP_IPV6PROTO) == 0) { 1010 error = EAFNOSUPPORT; 1011 goto out; 1012 } 1013 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 1014 error = EAFNOSUPPORT; 1015 goto out; 1016 } 1017 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 1018 #ifdef INET 1019 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0) { 1020 error = EINVAL; 1021 goto out; 1022 } 1023 if ((inp->inp_vflag & INP_IPV4) == 0) { 1024 error = EAFNOSUPPORT; 1025 goto out; 1026 } 1027 restoreflags = true; 1028 inp->inp_vflag &= ~INP_IPV6; 1029 sinp = &sin; 1030 in6_sin6_2_sin(sinp, sin6); 1031 if (IN_MULTICAST( 1032 ntohl(sinp->sin_addr.s_addr))) { 1033 error = EAFNOSUPPORT; 1034 goto out; 1035 } 1036 if ((error = prison_remote_ip4(td->td_ucred, 1037 &sinp->sin_addr))) 1038 goto out; 1039 isipv6 = 0; 1040 #else /* !INET */ 1041 error = EAFNOSUPPORT; 1042 goto out; 1043 #endif /* INET */ 1044 } else { 1045 if ((inp->inp_vflag & INP_IPV6) == 0) { 1046 error = EAFNOSUPPORT; 1047 goto out; 1048 } 1049 restoreflags = true; 1050 inp->inp_vflag &= ~INP_IPV4; 1051 inp->inp_inc.inc_flags |= INC_ISIPV6; 1052 if ((error = prison_remote_ip6(td->td_ucred, 1053 &sin6->sin6_addr))) 1054 goto out; 1055 isipv6 = 1; 1056 } 1057 break; 1058 #endif /* INET6 */ 1059 default: 1060 error = EAFNOSUPPORT; 1061 goto out; 1062 } 1063 } 1064 if (!(flags & PRUS_OOB)) { 1065 if (tp->t_acktime == 0) 1066 tp->t_acktime = ticks; 1067 sbappendstream(&so->so_snd, m, flags); 1068 m = NULL; 1069 if (nam && tp->t_state < TCPS_SYN_SENT) { 1070 KASSERT(tp->t_state == TCPS_CLOSED, 1071 ("%s: tp %p is listening", __func__, tp)); 1072 1073 /* 1074 * Do implied connect if not yet connected, 1075 * initialize window to default value, and 1076 * initialize maxseg using peer's cached MSS. 1077 */ 1078 #ifdef INET6 1079 if (isipv6) 1080 error = tcp6_connect(tp, sin6, td); 1081 #endif /* INET6 */ 1082 #if defined(INET6) && defined(INET) 1083 else 1084 #endif 1085 #ifdef INET 1086 error = tcp_connect(tp, sinp, td); 1087 #endif 1088 /* 1089 * The bind operation in tcp_connect succeeded. We 1090 * no longer want to restore the flags if later 1091 * operations fail. 1092 */ 1093 if (error == 0 || inp->inp_lport != 0) 1094 restoreflags = false; 1095 1096 if (error) { 1097 /* m is freed if PRUS_NOTREADY is unset. */ 1098 sbflush(&so->so_snd); 1099 goto out; 1100 } 1101 if (tp->t_flags & TF_FASTOPEN) 1102 tcp_fastopen_connect(tp); 1103 else { 1104 tp->snd_wnd = TTCP_CLIENT_SND_WND; 1105 tcp_mss(tp, -1); 1106 } 1107 } 1108 if (flags & PRUS_EOF) { 1109 /* 1110 * Close the send side of the connection after 1111 * the data is sent. 1112 */ 1113 socantsendmore(so); 1114 tcp_usrclosed(tp); 1115 } 1116 if (TCPS_HAVEESTABLISHED(tp->t_state) && 1117 ((tp->t_flags2 & TF2_FBYTES_COMPLETE) == 0) && 1118 (tp->t_fbyte_out == 0) && 1119 (so->so_snd.sb_ccc > 0)) { 1120 tp->t_fbyte_out = ticks; 1121 if (tp->t_fbyte_out == 0) 1122 tp->t_fbyte_out = 1; 1123 if (tp->t_fbyte_out && tp->t_fbyte_in) 1124 tp->t_flags2 |= TF2_FBYTES_COMPLETE; 1125 } 1126 if (!(inp->inp_flags & INP_DROPPED) && 1127 !(flags & PRUS_NOTREADY)) { 1128 if (flags & PRUS_MORETOCOME) 1129 tp->t_flags |= TF_MORETOCOME; 1130 error = tcp_output_nodrop(tp); 1131 if (flags & PRUS_MORETOCOME) 1132 tp->t_flags &= ~TF_MORETOCOME; 1133 } 1134 } else { 1135 /* 1136 * XXXRW: PRUS_EOF not implemented with PRUS_OOB? 1137 */ 1138 SOCK_SENDBUF_LOCK(so); 1139 if (sbspace(&so->so_snd) < -512) { 1140 SOCK_SENDBUF_UNLOCK(so); 1141 error = ENOBUFS; 1142 goto out; 1143 } 1144 /* 1145 * According to RFC961 (Assigned Protocols), 1146 * the urgent pointer points to the last octet 1147 * of urgent data. We continue, however, 1148 * to consider it to indicate the first octet 1149 * of data past the urgent section. 1150 * Otherwise, snd_up should be one lower. 1151 */ 1152 if (tp->t_acktime == 0) 1153 tp->t_acktime = ticks; 1154 sbappendstream_locked(&so->so_snd, m, flags); 1155 SOCK_SENDBUF_UNLOCK(so); 1156 m = NULL; 1157 if (nam && tp->t_state < TCPS_SYN_SENT) { 1158 /* 1159 * Do implied connect if not yet connected, 1160 * initialize window to default value, and 1161 * initialize maxseg using peer's cached MSS. 1162 */ 1163 1164 /* 1165 * Not going to contemplate SYN|URG 1166 */ 1167 if (tp->t_flags & TF_FASTOPEN) 1168 tp->t_flags &= ~TF_FASTOPEN; 1169 #ifdef INET6 1170 if (isipv6) 1171 error = tcp6_connect(tp, sin6, td); 1172 #endif /* INET6 */ 1173 #if defined(INET6) && defined(INET) 1174 else 1175 #endif 1176 #ifdef INET 1177 error = tcp_connect(tp, sinp, td); 1178 #endif 1179 /* 1180 * The bind operation in tcp_connect succeeded. We 1181 * no longer want to restore the flags if later 1182 * operations fail. 1183 */ 1184 if (error == 0 || inp->inp_lport != 0) 1185 restoreflags = false; 1186 1187 if (error != 0) { 1188 /* m is freed if PRUS_NOTREADY is unset. */ 1189 sbflush(&so->so_snd); 1190 goto out; 1191 } 1192 tp->snd_wnd = TTCP_CLIENT_SND_WND; 1193 tcp_mss(tp, -1); 1194 } 1195 tp->snd_up = tp->snd_una + sbavail(&so->so_snd); 1196 if ((flags & PRUS_NOTREADY) == 0) { 1197 tp->t_flags |= TF_FORCEDATA; 1198 error = tcp_output_nodrop(tp); 1199 tp->t_flags &= ~TF_FORCEDATA; 1200 } 1201 } 1202 TCP_LOG_EVENT(tp, NULL, 1203 &inp->inp_socket->so_rcv, 1204 &inp->inp_socket->so_snd, 1205 TCP_LOG_USERSEND, error, 1206 0, NULL, false); 1207 1208 out: 1209 /* 1210 * In case of PRUS_NOTREADY, the caller or tcp_usr_ready() is 1211 * responsible for freeing memory. 1212 */ 1213 if (m != NULL && (flags & PRUS_NOTREADY) == 0) 1214 m_freem(m); 1215 1216 /* 1217 * If the request was unsuccessful and we changed flags, 1218 * restore the original flags. 1219 */ 1220 if (error != 0 && restoreflags) { 1221 inp->inp_vflag = vflagsav; 1222 inp->inp_inc.inc_flags = incflagsav; 1223 } 1224 tcp_bblog_pru(tp, (flags & PRUS_OOB) ? PRU_SENDOOB : 1225 ((flags & PRUS_EOF) ? PRU_SEND_EOF : PRU_SEND), error); 1226 TCP_PROBE2(debug__user, tp, (flags & PRUS_OOB) ? PRU_SENDOOB : 1227 ((flags & PRUS_EOF) ? PRU_SEND_EOF : PRU_SEND)); 1228 error = tcp_unlock_or_drop(tp, error); 1229 NET_EPOCH_EXIT(et); 1230 return (error); 1231 } 1232 1233 static int 1234 tcp_usr_ready(struct socket *so, struct mbuf *m, int count) 1235 { 1236 struct epoch_tracker et; 1237 struct inpcb *inp; 1238 struct tcpcb *tp; 1239 int error; 1240 1241 inp = sotoinpcb(so); 1242 INP_WLOCK(inp); 1243 if (inp->inp_flags & INP_DROPPED) { 1244 INP_WUNLOCK(inp); 1245 mb_free_notready(m, count); 1246 return (ECONNRESET); 1247 } 1248 tp = intotcpcb(inp); 1249 1250 SOCK_SENDBUF_LOCK(so); 1251 error = sbready(&so->so_snd, m, count); 1252 SOCK_SENDBUF_UNLOCK(so); 1253 if (error) { 1254 INP_WUNLOCK(inp); 1255 return (error); 1256 } 1257 NET_EPOCH_ENTER(et); 1258 error = tcp_output_unlock(tp); 1259 NET_EPOCH_EXIT(et); 1260 1261 return (error); 1262 } 1263 1264 /* 1265 * Abort the TCP. Drop the connection abruptly. 1266 */ 1267 static void 1268 tcp_usr_abort(struct socket *so) 1269 { 1270 struct inpcb *inp; 1271 struct tcpcb *tp; 1272 struct epoch_tracker et; 1273 1274 inp = sotoinpcb(so); 1275 KASSERT(inp != NULL, ("tcp_usr_abort: inp == NULL")); 1276 1277 NET_EPOCH_ENTER(et); 1278 INP_WLOCK(inp); 1279 KASSERT(inp->inp_socket != NULL, 1280 ("tcp_usr_abort: inp_socket == NULL")); 1281 1282 /* 1283 * If we still have full TCP state, and we're not dropped, drop. 1284 */ 1285 if (!(inp->inp_flags & INP_DROPPED)) { 1286 tp = intotcpcb(inp); 1287 tp = tcp_drop(tp, ECONNABORTED); 1288 if (tp == NULL) 1289 goto dropped; 1290 tcp_bblog_pru(tp, PRU_ABORT, 0); 1291 TCP_PROBE2(debug__user, tp, PRU_ABORT); 1292 } 1293 if (!(inp->inp_flags & INP_DROPPED)) { 1294 soref(so); 1295 inp->inp_flags |= INP_SOCKREF; 1296 } 1297 INP_WUNLOCK(inp); 1298 dropped: 1299 NET_EPOCH_EXIT(et); 1300 } 1301 1302 /* 1303 * TCP socket is closed. Start friendly disconnect. 1304 */ 1305 static void 1306 tcp_usr_close(struct socket *so) 1307 { 1308 struct inpcb *inp; 1309 struct tcpcb *tp; 1310 struct epoch_tracker et; 1311 1312 inp = sotoinpcb(so); 1313 KASSERT(inp != NULL, ("tcp_usr_close: inp == NULL")); 1314 1315 NET_EPOCH_ENTER(et); 1316 INP_WLOCK(inp); 1317 KASSERT(inp->inp_socket != NULL, 1318 ("tcp_usr_close: inp_socket == NULL")); 1319 1320 /* 1321 * If we are still connected and we're not dropped, initiate 1322 * a disconnect. 1323 */ 1324 if (!(inp->inp_flags & INP_DROPPED)) { 1325 tp = intotcpcb(inp); 1326 if (tp->t_state != TCPS_TIME_WAIT) { 1327 tp->t_flags |= TF_CLOSED; 1328 tcp_disconnect(tp); 1329 tcp_bblog_pru(tp, PRU_CLOSE, 0); 1330 TCP_PROBE2(debug__user, tp, PRU_CLOSE); 1331 } 1332 } 1333 if (!(inp->inp_flags & INP_DROPPED)) { 1334 soref(so); 1335 inp->inp_flags |= INP_SOCKREF; 1336 } 1337 INP_WUNLOCK(inp); 1338 NET_EPOCH_EXIT(et); 1339 } 1340 1341 static int 1342 tcp_pru_options_support(struct tcpcb *tp, int flags) 1343 { 1344 /* 1345 * If the specific TCP stack has a pru_options 1346 * specified then it does not always support 1347 * all the PRU_XX options and we must ask it. 1348 * If the function is not specified then all 1349 * of the PRU_XX options are supported. 1350 */ 1351 int ret = 0; 1352 1353 if (tp->t_fb->tfb_pru_options) { 1354 ret = (*tp->t_fb->tfb_pru_options)(tp, flags); 1355 } 1356 return (ret); 1357 } 1358 1359 /* 1360 * Receive out-of-band data. 1361 */ 1362 static int 1363 tcp_usr_rcvoob(struct socket *so, struct mbuf *m, int flags) 1364 { 1365 int error = 0; 1366 struct inpcb *inp; 1367 struct tcpcb *tp; 1368 1369 inp = sotoinpcb(so); 1370 KASSERT(inp != NULL, ("tcp_usr_rcvoob: inp == NULL")); 1371 INP_WLOCK(inp); 1372 if (inp->inp_flags & INP_DROPPED) { 1373 INP_WUNLOCK(inp); 1374 return (ECONNRESET); 1375 } 1376 tp = intotcpcb(inp); 1377 1378 error = tcp_pru_options_support(tp, PRUS_OOB); 1379 if (error) { 1380 goto out; 1381 } 1382 if ((so->so_oobmark == 0 && 1383 (so->so_rcv.sb_state & SBS_RCVATMARK) == 0) || 1384 so->so_options & SO_OOBINLINE || 1385 tp->t_oobflags & TCPOOB_HADDATA) { 1386 error = EINVAL; 1387 goto out; 1388 } 1389 if ((tp->t_oobflags & TCPOOB_HAVEDATA) == 0) { 1390 error = EWOULDBLOCK; 1391 goto out; 1392 } 1393 m->m_len = 1; 1394 *mtod(m, caddr_t) = tp->t_iobc; 1395 if ((flags & MSG_PEEK) == 0) 1396 tp->t_oobflags ^= (TCPOOB_HAVEDATA | TCPOOB_HADDATA); 1397 1398 out: 1399 tcp_bblog_pru(tp, PRU_RCVOOB, error); 1400 TCP_PROBE2(debug__user, tp, PRU_RCVOOB); 1401 INP_WUNLOCK(inp); 1402 return (error); 1403 } 1404 1405 #ifdef INET 1406 struct protosw tcp_protosw = { 1407 .pr_type = SOCK_STREAM, 1408 .pr_protocol = IPPROTO_TCP, 1409 .pr_flags = PR_CONNREQUIRED | PR_IMPLOPCL | PR_WANTRCVD | 1410 PR_CAPATTACH, 1411 .pr_ctloutput = tcp_ctloutput, 1412 .pr_abort = tcp_usr_abort, 1413 .pr_accept = tcp_usr_accept, 1414 .pr_attach = tcp_usr_attach, 1415 .pr_bind = tcp_usr_bind, 1416 .pr_connect = tcp_usr_connect, 1417 .pr_control = in_control, 1418 .pr_detach = tcp_usr_detach, 1419 .pr_disconnect = tcp_usr_disconnect, 1420 .pr_listen = tcp_usr_listen, 1421 .pr_peeraddr = in_getpeeraddr, 1422 .pr_rcvd = tcp_usr_rcvd, 1423 .pr_rcvoob = tcp_usr_rcvoob, 1424 .pr_send = tcp_usr_send, 1425 .pr_ready = tcp_usr_ready, 1426 .pr_shutdown = tcp_usr_shutdown, 1427 .pr_sockaddr = in_getsockaddr, 1428 .pr_sosetlabel = in_pcbsosetlabel, 1429 .pr_close = tcp_usr_close, 1430 }; 1431 #endif /* INET */ 1432 1433 #ifdef INET6 1434 struct protosw tcp6_protosw = { 1435 .pr_type = SOCK_STREAM, 1436 .pr_protocol = IPPROTO_TCP, 1437 .pr_flags = PR_CONNREQUIRED | PR_IMPLOPCL |PR_WANTRCVD | 1438 PR_CAPATTACH, 1439 .pr_ctloutput = tcp_ctloutput, 1440 .pr_abort = tcp_usr_abort, 1441 .pr_accept = tcp6_usr_accept, 1442 .pr_attach = tcp_usr_attach, 1443 .pr_bind = tcp6_usr_bind, 1444 .pr_connect = tcp6_usr_connect, 1445 .pr_control = in6_control, 1446 .pr_detach = tcp_usr_detach, 1447 .pr_disconnect = tcp_usr_disconnect, 1448 .pr_listen = tcp6_usr_listen, 1449 .pr_peeraddr = in6_mapped_peeraddr, 1450 .pr_rcvd = tcp_usr_rcvd, 1451 .pr_rcvoob = tcp_usr_rcvoob, 1452 .pr_send = tcp_usr_send, 1453 .pr_ready = tcp_usr_ready, 1454 .pr_shutdown = tcp_usr_shutdown, 1455 .pr_sockaddr = in6_mapped_sockaddr, 1456 .pr_sosetlabel = in_pcbsosetlabel, 1457 .pr_close = tcp_usr_close, 1458 }; 1459 #endif /* INET6 */ 1460 1461 #ifdef INET 1462 /* 1463 * Common subroutine to open a TCP connection to remote host specified 1464 * by struct sockaddr_in. Call in_pcbconnect() to choose local host address 1465 * and assign a local port number and install the inpcb into the hash. 1466 * Initialize connection parameters and enter SYN-SENT state. 1467 */ 1468 static int 1469 tcp_connect(struct tcpcb *tp, struct sockaddr_in *sin, struct thread *td) 1470 { 1471 struct inpcb *inp = tptoinpcb(tp); 1472 struct socket *so = tptosocket(tp); 1473 int error; 1474 1475 NET_EPOCH_ASSERT(); 1476 INP_WLOCK_ASSERT(inp); 1477 1478 if (__predict_false((so->so_state & 1479 (SS_ISCONNECTING | SS_ISCONNECTED | SS_ISDISCONNECTING | 1480 SS_ISDISCONNECTED)) != 0)) 1481 return (EISCONN); 1482 1483 INP_HASH_WLOCK(&V_tcbinfo); 1484 error = in_pcbconnect(inp, sin, td->td_ucred); 1485 INP_HASH_WUNLOCK(&V_tcbinfo); 1486 if (error != 0) 1487 return (error); 1488 1489 /* 1490 * Compute window scaling to request: 1491 * Scale to fit into sweet spot. See tcp_syncache.c. 1492 * XXX: This should move to tcp_output(). 1493 */ 1494 while (tp->request_r_scale < TCP_MAX_WINSHIFT && 1495 (TCP_MAXWIN << tp->request_r_scale) < sb_max) 1496 tp->request_r_scale++; 1497 1498 soisconnecting(so); 1499 TCPSTAT_INC(tcps_connattempt); 1500 tcp_state_change(tp, TCPS_SYN_SENT); 1501 tp->iss = tcp_new_isn(&inp->inp_inc); 1502 if (tp->t_flags & TF_REQ_TSTMP) 1503 tp->ts_offset = tcp_new_ts_offset(&inp->inp_inc); 1504 tcp_sendseqinit(tp); 1505 1506 return (0); 1507 } 1508 #endif /* INET */ 1509 1510 #ifdef INET6 1511 static int 1512 tcp6_connect(struct tcpcb *tp, struct sockaddr_in6 *sin6, struct thread *td) 1513 { 1514 struct inpcb *inp = tptoinpcb(tp); 1515 struct socket *so = tptosocket(tp); 1516 int error; 1517 1518 NET_EPOCH_ASSERT(); 1519 INP_WLOCK_ASSERT(inp); 1520 1521 if (__predict_false((so->so_state & 1522 (SS_ISCONNECTING | SS_ISCONNECTED)) != 0)) 1523 return (EISCONN); 1524 1525 INP_HASH_WLOCK(&V_tcbinfo); 1526 error = in6_pcbconnect(inp, sin6, td->td_ucred, true); 1527 INP_HASH_WUNLOCK(&V_tcbinfo); 1528 if (error != 0) 1529 return (error); 1530 1531 /* Compute window scaling to request. */ 1532 while (tp->request_r_scale < TCP_MAX_WINSHIFT && 1533 (TCP_MAXWIN << tp->request_r_scale) < sb_max) 1534 tp->request_r_scale++; 1535 1536 soisconnecting(so); 1537 TCPSTAT_INC(tcps_connattempt); 1538 tcp_state_change(tp, TCPS_SYN_SENT); 1539 tp->iss = tcp_new_isn(&inp->inp_inc); 1540 if (tp->t_flags & TF_REQ_TSTMP) 1541 tp->ts_offset = tcp_new_ts_offset(&inp->inp_inc); 1542 tcp_sendseqinit(tp); 1543 1544 return (0); 1545 } 1546 #endif /* INET6 */ 1547 1548 /* 1549 * Export TCP internal state information via a struct tcp_info, based on the 1550 * Linux 2.6 API. Not ABI compatible as our constants are mapped differently 1551 * (TCP state machine, etc). We export all information using FreeBSD-native 1552 * constants -- for example, the numeric values for tcpi_state will differ 1553 * from Linux. 1554 */ 1555 void 1556 tcp_fill_info(const struct tcpcb *tp, struct tcp_info *ti) 1557 { 1558 1559 INP_LOCK_ASSERT(tptoinpcb(tp)); 1560 bzero(ti, sizeof(*ti)); 1561 1562 ti->tcpi_state = tp->t_state; 1563 if ((tp->t_flags & TF_REQ_TSTMP) && (tp->t_flags & TF_RCVD_TSTMP)) 1564 ti->tcpi_options |= TCPI_OPT_TIMESTAMPS; 1565 if (tp->t_flags & TF_SACK_PERMIT) 1566 ti->tcpi_options |= TCPI_OPT_SACK; 1567 if ((tp->t_flags & TF_REQ_SCALE) && (tp->t_flags & TF_RCVD_SCALE)) { 1568 ti->tcpi_options |= TCPI_OPT_WSCALE; 1569 ti->tcpi_snd_wscale = tp->snd_scale; 1570 ti->tcpi_rcv_wscale = tp->rcv_scale; 1571 } 1572 switch (tp->t_flags2 & (TF2_ECN_PERMIT | TF2_ACE_PERMIT)) { 1573 case TF2_ECN_PERMIT: 1574 ti->tcpi_options |= TCPI_OPT_ECN; 1575 break; 1576 case TF2_ACE_PERMIT: 1577 /* FALLTHROUGH */ 1578 case TF2_ECN_PERMIT | TF2_ACE_PERMIT: 1579 ti->tcpi_options |= TCPI_OPT_ACE; 1580 break; 1581 default: 1582 break; 1583 } 1584 if (tp->t_flags & TF_FASTOPEN) 1585 ti->tcpi_options |= TCPI_OPT_TFO; 1586 1587 ti->tcpi_rto = tp->t_rxtcur * tick; 1588 ti->tcpi_last_data_recv = ((uint32_t)ticks - tp->t_rcvtime) * tick; 1589 ti->tcpi_rtt = ((u_int64_t)tp->t_srtt * tick) >> TCP_RTT_SHIFT; 1590 ti->tcpi_rttvar = ((u_int64_t)tp->t_rttvar * tick) >> TCP_RTTVAR_SHIFT; 1591 1592 ti->tcpi_snd_ssthresh = tp->snd_ssthresh; 1593 ti->tcpi_snd_cwnd = tp->snd_cwnd; 1594 1595 /* 1596 * FreeBSD-specific extension fields for tcp_info. 1597 */ 1598 ti->tcpi_rcv_space = tp->rcv_wnd; 1599 ti->tcpi_rcv_nxt = tp->rcv_nxt; 1600 ti->tcpi_snd_wnd = tp->snd_wnd; 1601 ti->tcpi_snd_bwnd = 0; /* Unused, kept for compat. */ 1602 ti->tcpi_snd_nxt = tp->snd_nxt; 1603 ti->tcpi_snd_mss = tp->t_maxseg; 1604 ti->tcpi_rcv_mss = tp->t_maxseg; 1605 ti->tcpi_snd_rexmitpack = tp->t_sndrexmitpack; 1606 ti->tcpi_rcv_ooopack = tp->t_rcvoopack; 1607 ti->tcpi_snd_zerowin = tp->t_sndzerowin; 1608 ti->tcpi_snd_una = tp->snd_una; 1609 ti->tcpi_snd_max = tp->snd_max; 1610 ti->tcpi_rcv_numsacks = tp->rcv_numsacks; 1611 ti->tcpi_rcv_adv = tp->rcv_adv; 1612 ti->tcpi_dupacks = tp->t_dupacks; 1613 ti->tcpi_rttmin = tp->t_rttlow; 1614 #ifdef TCP_OFFLOAD 1615 if (tp->t_flags & TF_TOE) { 1616 ti->tcpi_options |= TCPI_OPT_TOE; 1617 tcp_offload_tcp_info(tp, ti); 1618 } 1619 #endif 1620 /* 1621 * AccECN related counters. 1622 */ 1623 if ((tp->t_flags2 & (TF2_ECN_PERMIT | TF2_ACE_PERMIT)) == 1624 (TF2_ECN_PERMIT | TF2_ACE_PERMIT)) 1625 /* 1626 * Internal counter starts at 5 for AccECN 1627 * but 0 for RFC3168 ECN. 1628 */ 1629 ti->tcpi_delivered_ce = tp->t_scep - 5; 1630 else 1631 ti->tcpi_delivered_ce = tp->t_scep; 1632 ti->tcpi_received_ce = tp->t_rcep; 1633 } 1634 1635 /* 1636 * tcp_ctloutput() must drop the inpcb lock before performing copyin on 1637 * socket option arguments. When it re-acquires the lock after the copy, it 1638 * has to revalidate that the connection is still valid for the socket 1639 * option. 1640 */ 1641 #define INP_WLOCK_RECHECK_CLEANUP(inp, cleanup) do { \ 1642 INP_WLOCK(inp); \ 1643 if (inp->inp_flags & INP_DROPPED) { \ 1644 INP_WUNLOCK(inp); \ 1645 cleanup; \ 1646 return (ECONNRESET); \ 1647 } \ 1648 tp = intotcpcb(inp); \ 1649 } while(0) 1650 #define INP_WLOCK_RECHECK(inp) INP_WLOCK_RECHECK_CLEANUP((inp), /* noop */) 1651 1652 int 1653 tcp_ctloutput_set(struct inpcb *inp, struct sockopt *sopt) 1654 { 1655 struct socket *so = inp->inp_socket; 1656 struct tcpcb *tp = intotcpcb(inp); 1657 int error = 0; 1658 1659 MPASS(sopt->sopt_dir == SOPT_SET); 1660 INP_WLOCK_ASSERT(inp); 1661 KASSERT((inp->inp_flags & INP_DROPPED) == 0, 1662 ("inp_flags == %x", inp->inp_flags)); 1663 KASSERT(so != NULL, ("inp_socket == NULL")); 1664 1665 if (sopt->sopt_level != IPPROTO_TCP) { 1666 INP_WUNLOCK(inp); 1667 #ifdef INET6 1668 if (inp->inp_vflag & INP_IPV6PROTO) 1669 error = ip6_ctloutput(so, sopt); 1670 #endif 1671 #if defined(INET6) && defined(INET) 1672 else 1673 #endif 1674 #ifdef INET 1675 error = ip_ctloutput(so, sopt); 1676 #endif 1677 /* 1678 * When an IP-level socket option affects TCP, pass control 1679 * down to stack tfb_tcp_ctloutput, otherwise return what 1680 * IP level returned. 1681 */ 1682 switch (sopt->sopt_level) { 1683 #ifdef INET6 1684 case IPPROTO_IPV6: 1685 if ((inp->inp_vflag & INP_IPV6PROTO) == 0) 1686 return (error); 1687 switch (sopt->sopt_name) { 1688 case IPV6_TCLASS: 1689 /* Notify tcp stacks that care (e.g. RACK). */ 1690 break; 1691 case IPV6_USE_MIN_MTU: 1692 /* Update t_maxseg accordingly. */ 1693 break; 1694 default: 1695 return (error); 1696 } 1697 break; 1698 #endif 1699 #ifdef INET 1700 case IPPROTO_IP: 1701 switch (sopt->sopt_name) { 1702 case IP_TOS: 1703 inp->inp_ip_tos &= ~IPTOS_ECN_MASK; 1704 break; 1705 case IP_TTL: 1706 /* Notify tcp stacks that care (e.g. RACK). */ 1707 break; 1708 default: 1709 return (error); 1710 } 1711 break; 1712 #endif 1713 default: 1714 return (error); 1715 } 1716 INP_WLOCK_RECHECK(inp); 1717 } else if (sopt->sopt_name == TCP_FUNCTION_BLK) { 1718 /* 1719 * Protect the TCP option TCP_FUNCTION_BLK so 1720 * that a sub-function can *never* overwrite this. 1721 */ 1722 struct tcp_function_set fsn; 1723 struct tcp_function_block *blk; 1724 void *ptr = NULL; 1725 1726 INP_WUNLOCK(inp); 1727 error = sooptcopyin(sopt, &fsn, sizeof fsn, sizeof fsn); 1728 if (error) 1729 return (error); 1730 1731 INP_WLOCK_RECHECK(inp); 1732 1733 blk = find_and_ref_tcp_functions(&fsn); 1734 if (blk == NULL) { 1735 INP_WUNLOCK(inp); 1736 return (ENOENT); 1737 } 1738 if (tp->t_fb == blk) { 1739 /* You already have this */ 1740 refcount_release(&blk->tfb_refcnt); 1741 INP_WUNLOCK(inp); 1742 return (0); 1743 } 1744 if (blk->tfb_flags & TCP_FUNC_BEING_REMOVED) { 1745 refcount_release(&blk->tfb_refcnt); 1746 INP_WUNLOCK(inp); 1747 return (ENOENT); 1748 } 1749 error = (*blk->tfb_tcp_handoff_ok)(tp); 1750 if (error) { 1751 refcount_release(&blk->tfb_refcnt); 1752 INP_WUNLOCK(inp); 1753 return (error); 1754 } 1755 /* 1756 * Ensure the new stack takes ownership with a 1757 * clean slate on peak rate threshold. 1758 */ 1759 if (tp->t_fb->tfb_tcp_timer_stop_all != NULL) 1760 tp->t_fb->tfb_tcp_timer_stop_all(tp); 1761 if (blk->tfb_tcp_fb_init) { 1762 error = (*blk->tfb_tcp_fb_init)(tp, &ptr); 1763 if (error) { 1764 /* 1765 * Release the ref count the lookup 1766 * acquired. 1767 */ 1768 refcount_release(&blk->tfb_refcnt); 1769 /* 1770 * Now there is a chance that the 1771 * init() function mucked with some 1772 * things before it failed, such as 1773 * hpts or inp_flags2 or timer granularity. 1774 * It should not of, but lets give the old 1775 * stack a chance to reset to a known good state. 1776 */ 1777 if (tp->t_fb->tfb_switch_failed) { 1778 (*tp->t_fb->tfb_switch_failed)(tp); 1779 } 1780 goto err_out; 1781 } 1782 } 1783 if (tp->t_fb->tfb_tcp_fb_fini) { 1784 struct epoch_tracker et; 1785 /* 1786 * Tell the stack to cleanup with 0 i.e. 1787 * the tcb is not going away. 1788 */ 1789 NET_EPOCH_ENTER(et); 1790 (*tp->t_fb->tfb_tcp_fb_fini)(tp, 0); 1791 NET_EPOCH_EXIT(et); 1792 } 1793 /* 1794 * Release the old refcnt, the 1795 * lookup acquired a ref on the 1796 * new one already. 1797 */ 1798 refcount_release(&tp->t_fb->tfb_refcnt); 1799 /* 1800 * Set in the new stack. 1801 */ 1802 tp->t_fb = blk; 1803 tp->t_fb_ptr = ptr; 1804 #ifdef TCP_OFFLOAD 1805 if (tp->t_flags & TF_TOE) { 1806 tcp_offload_ctloutput(tp, sopt->sopt_dir, 1807 sopt->sopt_name); 1808 } 1809 #endif 1810 err_out: 1811 INP_WUNLOCK(inp); 1812 return (error); 1813 1814 } 1815 1816 /* Pass in the INP locked, callee must unlock it. */ 1817 return (tp->t_fb->tfb_tcp_ctloutput(tp, sopt)); 1818 } 1819 1820 static int 1821 tcp_ctloutput_get(struct inpcb *inp, struct sockopt *sopt) 1822 { 1823 struct socket *so = inp->inp_socket; 1824 struct tcpcb *tp = intotcpcb(inp); 1825 int error = 0; 1826 1827 MPASS(sopt->sopt_dir == SOPT_GET); 1828 INP_WLOCK_ASSERT(inp); 1829 KASSERT((inp->inp_flags & INP_DROPPED) == 0, 1830 ("inp_flags == %x", inp->inp_flags)); 1831 KASSERT(so != NULL, ("inp_socket == NULL")); 1832 1833 if (sopt->sopt_level != IPPROTO_TCP) { 1834 INP_WUNLOCK(inp); 1835 #ifdef INET6 1836 if (inp->inp_vflag & INP_IPV6PROTO) 1837 error = ip6_ctloutput(so, sopt); 1838 #endif /* INET6 */ 1839 #if defined(INET6) && defined(INET) 1840 else 1841 #endif 1842 #ifdef INET 1843 error = ip_ctloutput(so, sopt); 1844 #endif 1845 return (error); 1846 } 1847 if (((sopt->sopt_name == TCP_FUNCTION_BLK) || 1848 (sopt->sopt_name == TCP_FUNCTION_ALIAS))) { 1849 struct tcp_function_set fsn; 1850 1851 if (sopt->sopt_name == TCP_FUNCTION_ALIAS) { 1852 memset(&fsn, 0, sizeof(fsn)); 1853 find_tcp_function_alias(tp->t_fb, &fsn); 1854 } else { 1855 strncpy(fsn.function_set_name, 1856 tp->t_fb->tfb_tcp_block_name, 1857 TCP_FUNCTION_NAME_LEN_MAX); 1858 fsn.function_set_name[TCP_FUNCTION_NAME_LEN_MAX - 1] = '\0'; 1859 } 1860 fsn.pcbcnt = tp->t_fb->tfb_refcnt; 1861 INP_WUNLOCK(inp); 1862 error = sooptcopyout(sopt, &fsn, sizeof fsn); 1863 return (error); 1864 } 1865 1866 /* Pass in the INP locked, callee must unlock it. */ 1867 return (tp->t_fb->tfb_tcp_ctloutput(tp, sopt)); 1868 } 1869 1870 int 1871 tcp_ctloutput(struct socket *so, struct sockopt *sopt) 1872 { 1873 struct inpcb *inp; 1874 1875 inp = sotoinpcb(so); 1876 KASSERT(inp != NULL, ("tcp_ctloutput: inp == NULL")); 1877 1878 INP_WLOCK(inp); 1879 if (inp->inp_flags & INP_DROPPED) { 1880 INP_WUNLOCK(inp); 1881 return (ECONNRESET); 1882 } 1883 if (sopt->sopt_dir == SOPT_SET) 1884 return (tcp_ctloutput_set(inp, sopt)); 1885 else if (sopt->sopt_dir == SOPT_GET) 1886 return (tcp_ctloutput_get(inp, sopt)); 1887 else 1888 panic("%s: sopt_dir $%d", __func__, sopt->sopt_dir); 1889 } 1890 1891 /* 1892 * If this assert becomes untrue, we need to change the size of the buf 1893 * variable in tcp_default_ctloutput(). 1894 */ 1895 #ifdef CTASSERT 1896 CTASSERT(TCP_CA_NAME_MAX <= TCP_LOG_ID_LEN); 1897 CTASSERT(TCP_LOG_REASON_LEN <= TCP_LOG_ID_LEN); 1898 #endif 1899 1900 extern struct cc_algo newreno_cc_algo; 1901 1902 static int 1903 tcp_set_cc_mod(struct inpcb *inp, struct sockopt *sopt) 1904 { 1905 struct cc_algo *algo; 1906 void *ptr = NULL; 1907 struct tcpcb *tp; 1908 struct cc_var cc_mem; 1909 char buf[TCP_CA_NAME_MAX]; 1910 size_t mem_sz; 1911 int error; 1912 1913 INP_WUNLOCK(inp); 1914 error = sooptcopyin(sopt, buf, TCP_CA_NAME_MAX - 1, 1); 1915 if (error) 1916 return(error); 1917 buf[sopt->sopt_valsize] = '\0'; 1918 CC_LIST_RLOCK(); 1919 STAILQ_FOREACH(algo, &cc_list, entries) { 1920 if (strncmp(buf, algo->name, 1921 TCP_CA_NAME_MAX) == 0) { 1922 if (algo->flags & CC_MODULE_BEING_REMOVED) { 1923 /* We can't "see" modules being unloaded */ 1924 continue; 1925 } 1926 break; 1927 } 1928 } 1929 if (algo == NULL) { 1930 CC_LIST_RUNLOCK(); 1931 return(ESRCH); 1932 } 1933 /* 1934 * With a reference the algorithm cannot be removed 1935 * so we hold a reference through the change process. 1936 */ 1937 cc_refer(algo); 1938 CC_LIST_RUNLOCK(); 1939 if (algo->cb_init != NULL) { 1940 /* We can now pre-get the memory for the CC */ 1941 mem_sz = (*algo->cc_data_sz)(); 1942 if (mem_sz == 0) { 1943 goto no_mem_needed; 1944 } 1945 ptr = malloc(mem_sz, M_CC_MEM, M_WAITOK); 1946 } else { 1947 no_mem_needed: 1948 mem_sz = 0; 1949 ptr = NULL; 1950 } 1951 /* 1952 * Make sure its all clean and zero and also get 1953 * back the inplock. 1954 */ 1955 memset(&cc_mem, 0, sizeof(cc_mem)); 1956 INP_WLOCK(inp); 1957 if (inp->inp_flags & INP_DROPPED) { 1958 INP_WUNLOCK(inp); 1959 if (ptr) 1960 free(ptr, M_CC_MEM); 1961 /* Release our temp reference */ 1962 CC_LIST_RLOCK(); 1963 cc_release(algo); 1964 CC_LIST_RUNLOCK(); 1965 return (ECONNRESET); 1966 } 1967 tp = intotcpcb(inp); 1968 if (ptr != NULL) 1969 memset(ptr, 0, mem_sz); 1970 cc_mem.tp = tp; 1971 /* 1972 * We once again hold a write lock over the tcb so it's 1973 * safe to do these things without ordering concerns. 1974 * Note here we init into stack memory. 1975 */ 1976 if (algo->cb_init != NULL) 1977 error = algo->cb_init(&cc_mem, ptr); 1978 else 1979 error = 0; 1980 /* 1981 * The CC algorithms, when given their memory 1982 * should not fail we could in theory have a 1983 * KASSERT here. 1984 */ 1985 if (error == 0) { 1986 /* 1987 * Touchdown, lets go ahead and move the 1988 * connection to the new CC module by 1989 * copying in the cc_mem after we call 1990 * the old ones cleanup (if any). 1991 */ 1992 if (CC_ALGO(tp)->cb_destroy != NULL) 1993 CC_ALGO(tp)->cb_destroy(&tp->t_ccv); 1994 /* Detach the old CC from the tcpcb */ 1995 cc_detach(tp); 1996 /* Copy in our temp memory that was inited */ 1997 memcpy(&tp->t_ccv, &cc_mem, sizeof(struct cc_var)); 1998 /* Now attach the new, which takes a reference */ 1999 cc_attach(tp, algo); 2000 /* Ok now are we where we have gotten past any conn_init? */ 2001 if (TCPS_HAVEESTABLISHED(tp->t_state) && (CC_ALGO(tp)->conn_init != NULL)) { 2002 /* Yep run the connection init for the new CC */ 2003 CC_ALGO(tp)->conn_init(&tp->t_ccv); 2004 } 2005 } else if (ptr) 2006 free(ptr, M_CC_MEM); 2007 INP_WUNLOCK(inp); 2008 /* Now lets release our temp reference */ 2009 CC_LIST_RLOCK(); 2010 cc_release(algo); 2011 CC_LIST_RUNLOCK(); 2012 return (error); 2013 } 2014 2015 int 2016 tcp_default_ctloutput(struct tcpcb *tp, struct sockopt *sopt) 2017 { 2018 struct inpcb *inp = tptoinpcb(tp); 2019 int error, opt, optval; 2020 u_int ui; 2021 struct tcp_info ti; 2022 #ifdef KERN_TLS 2023 struct tls_enable tls; 2024 struct socket *so = inp->inp_socket; 2025 #endif 2026 char *pbuf, buf[TCP_LOG_ID_LEN]; 2027 #ifdef STATS 2028 struct statsblob *sbp; 2029 #endif 2030 size_t len; 2031 2032 INP_WLOCK_ASSERT(inp); 2033 KASSERT((inp->inp_flags & INP_DROPPED) == 0, 2034 ("inp_flags == %x", inp->inp_flags)); 2035 KASSERT(inp->inp_socket != NULL, ("inp_socket == NULL")); 2036 2037 switch (sopt->sopt_level) { 2038 #ifdef INET6 2039 case IPPROTO_IPV6: 2040 MPASS(inp->inp_vflag & INP_IPV6PROTO); 2041 switch (sopt->sopt_name) { 2042 case IPV6_USE_MIN_MTU: 2043 tcp6_use_min_mtu(tp); 2044 /* FALLTHROUGH */ 2045 } 2046 INP_WUNLOCK(inp); 2047 return (0); 2048 #endif 2049 #ifdef INET 2050 case IPPROTO_IP: 2051 INP_WUNLOCK(inp); 2052 return (0); 2053 #endif 2054 } 2055 2056 /* 2057 * For TCP_CCALGOOPT forward the control to CC module, for both 2058 * SOPT_SET and SOPT_GET. 2059 */ 2060 switch (sopt->sopt_name) { 2061 case TCP_CCALGOOPT: 2062 INP_WUNLOCK(inp); 2063 if (sopt->sopt_valsize > CC_ALGOOPT_LIMIT) 2064 return (EINVAL); 2065 pbuf = malloc(sopt->sopt_valsize, M_TEMP, M_WAITOK | M_ZERO); 2066 error = sooptcopyin(sopt, pbuf, sopt->sopt_valsize, 2067 sopt->sopt_valsize); 2068 if (error) { 2069 free(pbuf, M_TEMP); 2070 return (error); 2071 } 2072 INP_WLOCK_RECHECK_CLEANUP(inp, free(pbuf, M_TEMP)); 2073 if (CC_ALGO(tp)->ctl_output != NULL) 2074 error = CC_ALGO(tp)->ctl_output(&tp->t_ccv, sopt, pbuf); 2075 else 2076 error = ENOENT; 2077 INP_WUNLOCK(inp); 2078 if (error == 0 && sopt->sopt_dir == SOPT_GET) 2079 error = sooptcopyout(sopt, pbuf, sopt->sopt_valsize); 2080 free(pbuf, M_TEMP); 2081 return (error); 2082 } 2083 2084 switch (sopt->sopt_dir) { 2085 case SOPT_SET: 2086 switch (sopt->sopt_name) { 2087 #if defined(IPSEC_SUPPORT) || defined(TCP_SIGNATURE) 2088 case TCP_MD5SIG: 2089 INP_WUNLOCK(inp); 2090 if (!TCPMD5_ENABLED()) 2091 return (ENOPROTOOPT); 2092 error = TCPMD5_PCBCTL(inp, sopt); 2093 if (error) 2094 return (error); 2095 INP_WLOCK_RECHECK(inp); 2096 goto unlock_and_done; 2097 #endif /* IPSEC */ 2098 2099 case TCP_NODELAY: 2100 case TCP_NOOPT: 2101 INP_WUNLOCK(inp); 2102 error = sooptcopyin(sopt, &optval, sizeof optval, 2103 sizeof optval); 2104 if (error) 2105 return (error); 2106 2107 INP_WLOCK_RECHECK(inp); 2108 switch (sopt->sopt_name) { 2109 case TCP_NODELAY: 2110 opt = TF_NODELAY; 2111 break; 2112 case TCP_NOOPT: 2113 opt = TF_NOOPT; 2114 break; 2115 default: 2116 opt = 0; /* dead code to fool gcc */ 2117 break; 2118 } 2119 2120 if (optval) 2121 tp->t_flags |= opt; 2122 else 2123 tp->t_flags &= ~opt; 2124 unlock_and_done: 2125 #ifdef TCP_OFFLOAD 2126 if (tp->t_flags & TF_TOE) { 2127 tcp_offload_ctloutput(tp, sopt->sopt_dir, 2128 sopt->sopt_name); 2129 } 2130 #endif 2131 INP_WUNLOCK(inp); 2132 break; 2133 2134 case TCP_NOPUSH: 2135 INP_WUNLOCK(inp); 2136 error = sooptcopyin(sopt, &optval, sizeof optval, 2137 sizeof optval); 2138 if (error) 2139 return (error); 2140 2141 INP_WLOCK_RECHECK(inp); 2142 if (optval) 2143 tp->t_flags |= TF_NOPUSH; 2144 else if (tp->t_flags & TF_NOPUSH) { 2145 tp->t_flags &= ~TF_NOPUSH; 2146 if (TCPS_HAVEESTABLISHED(tp->t_state)) { 2147 struct epoch_tracker et; 2148 2149 NET_EPOCH_ENTER(et); 2150 error = tcp_output_nodrop(tp); 2151 NET_EPOCH_EXIT(et); 2152 } 2153 } 2154 goto unlock_and_done; 2155 2156 case TCP_REMOTE_UDP_ENCAPS_PORT: 2157 INP_WUNLOCK(inp); 2158 error = sooptcopyin(sopt, &optval, sizeof optval, 2159 sizeof optval); 2160 if (error) 2161 return (error); 2162 if ((optval < TCP_TUNNELING_PORT_MIN) || 2163 (optval > TCP_TUNNELING_PORT_MAX)) { 2164 /* Its got to be in range */ 2165 return (EINVAL); 2166 } 2167 if ((V_tcp_udp_tunneling_port == 0) && (optval != 0)) { 2168 /* You have to have enabled a UDP tunneling port first */ 2169 return (EINVAL); 2170 } 2171 INP_WLOCK_RECHECK(inp); 2172 if (tp->t_state != TCPS_CLOSED) { 2173 /* You can't change after you are connected */ 2174 error = EINVAL; 2175 } else { 2176 /* Ok we are all good set the port */ 2177 tp->t_port = htons(optval); 2178 } 2179 goto unlock_and_done; 2180 2181 case TCP_MAXSEG: 2182 INP_WUNLOCK(inp); 2183 error = sooptcopyin(sopt, &optval, sizeof optval, 2184 sizeof optval); 2185 if (error) 2186 return (error); 2187 2188 INP_WLOCK_RECHECK(inp); 2189 if (optval > 0 && optval <= tp->t_maxseg && 2190 optval + 40 >= V_tcp_minmss) { 2191 tp->t_maxseg = optval; 2192 if (tp->t_maxseg < V_tcp_mssdflt) { 2193 /* 2194 * The MSS is so small we should not process incoming 2195 * SACK's since we are subject to attack in such a 2196 * case. 2197 */ 2198 tp->t_flags2 |= TF2_PROC_SACK_PROHIBIT; 2199 } else { 2200 tp->t_flags2 &= ~TF2_PROC_SACK_PROHIBIT; 2201 } 2202 } else 2203 error = EINVAL; 2204 goto unlock_and_done; 2205 2206 case TCP_INFO: 2207 INP_WUNLOCK(inp); 2208 error = EINVAL; 2209 break; 2210 2211 case TCP_STATS: 2212 INP_WUNLOCK(inp); 2213 #ifdef STATS 2214 error = sooptcopyin(sopt, &optval, sizeof optval, 2215 sizeof optval); 2216 if (error) 2217 return (error); 2218 2219 if (optval > 0) 2220 sbp = stats_blob_alloc( 2221 V_tcp_perconn_stats_dflt_tpl, 0); 2222 else 2223 sbp = NULL; 2224 2225 INP_WLOCK_RECHECK(inp); 2226 if ((tp->t_stats != NULL && sbp == NULL) || 2227 (tp->t_stats == NULL && sbp != NULL)) { 2228 struct statsblob *t = tp->t_stats; 2229 tp->t_stats = sbp; 2230 sbp = t; 2231 } 2232 INP_WUNLOCK(inp); 2233 2234 stats_blob_destroy(sbp); 2235 #else 2236 return (EOPNOTSUPP); 2237 #endif /* !STATS */ 2238 break; 2239 2240 case TCP_CONGESTION: 2241 error = tcp_set_cc_mod(inp, sopt); 2242 break; 2243 2244 case TCP_REUSPORT_LB_NUMA: 2245 INP_WUNLOCK(inp); 2246 error = sooptcopyin(sopt, &optval, sizeof(optval), 2247 sizeof(optval)); 2248 INP_WLOCK_RECHECK(inp); 2249 if (!error) 2250 error = in_pcblbgroup_numa(inp, optval); 2251 INP_WUNLOCK(inp); 2252 break; 2253 2254 #ifdef KERN_TLS 2255 case TCP_TXTLS_ENABLE: 2256 INP_WUNLOCK(inp); 2257 error = ktls_copyin_tls_enable(sopt, &tls); 2258 if (error != 0) 2259 break; 2260 error = ktls_enable_tx(so, &tls); 2261 ktls_cleanup_tls_enable(&tls); 2262 break; 2263 case TCP_TXTLS_MODE: 2264 INP_WUNLOCK(inp); 2265 error = sooptcopyin(sopt, &ui, sizeof(ui), sizeof(ui)); 2266 if (error != 0) 2267 return (error); 2268 2269 INP_WLOCK_RECHECK(inp); 2270 error = ktls_set_tx_mode(so, ui); 2271 INP_WUNLOCK(inp); 2272 break; 2273 case TCP_RXTLS_ENABLE: 2274 INP_WUNLOCK(inp); 2275 error = ktls_copyin_tls_enable(sopt, &tls); 2276 if (error != 0) 2277 break; 2278 error = ktls_enable_rx(so, &tls); 2279 ktls_cleanup_tls_enable(&tls); 2280 break; 2281 #endif 2282 case TCP_MAXUNACKTIME: 2283 case TCP_KEEPIDLE: 2284 case TCP_KEEPINTVL: 2285 case TCP_KEEPINIT: 2286 INP_WUNLOCK(inp); 2287 error = sooptcopyin(sopt, &ui, sizeof(ui), sizeof(ui)); 2288 if (error) 2289 return (error); 2290 2291 if (ui > (UINT_MAX / hz)) { 2292 error = EINVAL; 2293 break; 2294 } 2295 ui *= hz; 2296 2297 INP_WLOCK_RECHECK(inp); 2298 switch (sopt->sopt_name) { 2299 case TCP_MAXUNACKTIME: 2300 tp->t_maxunacktime = ui; 2301 break; 2302 2303 case TCP_KEEPIDLE: 2304 tp->t_keepidle = ui; 2305 /* 2306 * XXX: better check current remaining 2307 * timeout and "merge" it with new value. 2308 */ 2309 if ((tp->t_state > TCPS_LISTEN) && 2310 (tp->t_state <= TCPS_CLOSING)) 2311 tcp_timer_activate(tp, TT_KEEP, 2312 TP_KEEPIDLE(tp)); 2313 break; 2314 case TCP_KEEPINTVL: 2315 tp->t_keepintvl = ui; 2316 if ((tp->t_state == TCPS_FIN_WAIT_2) && 2317 (TP_MAXIDLE(tp) > 0)) 2318 tcp_timer_activate(tp, TT_2MSL, 2319 TP_MAXIDLE(tp)); 2320 break; 2321 case TCP_KEEPINIT: 2322 tp->t_keepinit = ui; 2323 if (tp->t_state == TCPS_SYN_RECEIVED || 2324 tp->t_state == TCPS_SYN_SENT) 2325 tcp_timer_activate(tp, TT_KEEP, 2326 TP_KEEPINIT(tp)); 2327 break; 2328 } 2329 goto unlock_and_done; 2330 2331 case TCP_KEEPCNT: 2332 INP_WUNLOCK(inp); 2333 error = sooptcopyin(sopt, &ui, sizeof(ui), sizeof(ui)); 2334 if (error) 2335 return (error); 2336 2337 INP_WLOCK_RECHECK(inp); 2338 tp->t_keepcnt = ui; 2339 if ((tp->t_state == TCPS_FIN_WAIT_2) && 2340 (TP_MAXIDLE(tp) > 0)) 2341 tcp_timer_activate(tp, TT_2MSL, 2342 TP_MAXIDLE(tp)); 2343 goto unlock_and_done; 2344 2345 #ifdef TCPPCAP 2346 case TCP_PCAP_OUT: 2347 case TCP_PCAP_IN: 2348 INP_WUNLOCK(inp); 2349 error = sooptcopyin(sopt, &optval, sizeof optval, 2350 sizeof optval); 2351 if (error) 2352 return (error); 2353 2354 INP_WLOCK_RECHECK(inp); 2355 if (optval >= 0) 2356 tcp_pcap_set_sock_max( 2357 (sopt->sopt_name == TCP_PCAP_OUT) ? 2358 &(tp->t_outpkts) : &(tp->t_inpkts), 2359 optval); 2360 else 2361 error = EINVAL; 2362 goto unlock_and_done; 2363 #endif 2364 2365 case TCP_FASTOPEN: { 2366 struct tcp_fastopen tfo_optval; 2367 2368 INP_WUNLOCK(inp); 2369 if (!V_tcp_fastopen_client_enable && 2370 !V_tcp_fastopen_server_enable) 2371 return (EPERM); 2372 2373 error = sooptcopyin(sopt, &tfo_optval, 2374 sizeof(tfo_optval), sizeof(int)); 2375 if (error) 2376 return (error); 2377 2378 INP_WLOCK_RECHECK(inp); 2379 if ((tp->t_state != TCPS_CLOSED) && 2380 (tp->t_state != TCPS_LISTEN)) { 2381 error = EINVAL; 2382 goto unlock_and_done; 2383 } 2384 if (tfo_optval.enable) { 2385 if (tp->t_state == TCPS_LISTEN) { 2386 if (!V_tcp_fastopen_server_enable) { 2387 error = EPERM; 2388 goto unlock_and_done; 2389 } 2390 2391 if (tp->t_tfo_pending == NULL) 2392 tp->t_tfo_pending = 2393 tcp_fastopen_alloc_counter(); 2394 } else { 2395 /* 2396 * If a pre-shared key was provided, 2397 * stash it in the client cookie 2398 * field of the tcpcb for use during 2399 * connect. 2400 */ 2401 if (sopt->sopt_valsize == 2402 sizeof(tfo_optval)) { 2403 memcpy(tp->t_tfo_cookie.client, 2404 tfo_optval.psk, 2405 TCP_FASTOPEN_PSK_LEN); 2406 tp->t_tfo_client_cookie_len = 2407 TCP_FASTOPEN_PSK_LEN; 2408 } 2409 } 2410 tp->t_flags |= TF_FASTOPEN; 2411 } else 2412 tp->t_flags &= ~TF_FASTOPEN; 2413 goto unlock_and_done; 2414 } 2415 2416 #ifdef TCP_BLACKBOX 2417 case TCP_LOG: 2418 INP_WUNLOCK(inp); 2419 error = sooptcopyin(sopt, &optval, sizeof optval, 2420 sizeof optval); 2421 if (error) 2422 return (error); 2423 2424 INP_WLOCK_RECHECK(inp); 2425 error = tcp_log_state_change(tp, optval); 2426 goto unlock_and_done; 2427 2428 case TCP_LOGBUF: 2429 INP_WUNLOCK(inp); 2430 error = EINVAL; 2431 break; 2432 2433 case TCP_LOGID: 2434 INP_WUNLOCK(inp); 2435 error = sooptcopyin(sopt, buf, TCP_LOG_ID_LEN - 1, 0); 2436 if (error) 2437 break; 2438 buf[sopt->sopt_valsize] = '\0'; 2439 INP_WLOCK_RECHECK(inp); 2440 error = tcp_log_set_id(tp, buf); 2441 /* tcp_log_set_id() unlocks the INP. */ 2442 break; 2443 2444 case TCP_LOGDUMP: 2445 case TCP_LOGDUMPID: 2446 INP_WUNLOCK(inp); 2447 error = 2448 sooptcopyin(sopt, buf, TCP_LOG_REASON_LEN - 1, 0); 2449 if (error) 2450 break; 2451 buf[sopt->sopt_valsize] = '\0'; 2452 INP_WLOCK_RECHECK(inp); 2453 if (sopt->sopt_name == TCP_LOGDUMP) { 2454 error = tcp_log_dump_tp_logbuf(tp, buf, 2455 M_WAITOK, true); 2456 INP_WUNLOCK(inp); 2457 } else { 2458 tcp_log_dump_tp_bucket_logbufs(tp, buf); 2459 /* 2460 * tcp_log_dump_tp_bucket_logbufs() drops the 2461 * INP lock. 2462 */ 2463 } 2464 break; 2465 #endif 2466 2467 default: 2468 INP_WUNLOCK(inp); 2469 error = ENOPROTOOPT; 2470 break; 2471 } 2472 break; 2473 2474 case SOPT_GET: 2475 tp = intotcpcb(inp); 2476 switch (sopt->sopt_name) { 2477 #if defined(IPSEC_SUPPORT) || defined(TCP_SIGNATURE) 2478 case TCP_MD5SIG: 2479 INP_WUNLOCK(inp); 2480 if (!TCPMD5_ENABLED()) 2481 return (ENOPROTOOPT); 2482 error = TCPMD5_PCBCTL(inp, sopt); 2483 break; 2484 #endif 2485 2486 case TCP_NODELAY: 2487 optval = tp->t_flags & TF_NODELAY; 2488 INP_WUNLOCK(inp); 2489 error = sooptcopyout(sopt, &optval, sizeof optval); 2490 break; 2491 case TCP_MAXSEG: 2492 optval = tp->t_maxseg; 2493 INP_WUNLOCK(inp); 2494 error = sooptcopyout(sopt, &optval, sizeof optval); 2495 break; 2496 case TCP_REMOTE_UDP_ENCAPS_PORT: 2497 optval = ntohs(tp->t_port); 2498 INP_WUNLOCK(inp); 2499 error = sooptcopyout(sopt, &optval, sizeof optval); 2500 break; 2501 case TCP_NOOPT: 2502 optval = tp->t_flags & TF_NOOPT; 2503 INP_WUNLOCK(inp); 2504 error = sooptcopyout(sopt, &optval, sizeof optval); 2505 break; 2506 case TCP_NOPUSH: 2507 optval = tp->t_flags & TF_NOPUSH; 2508 INP_WUNLOCK(inp); 2509 error = sooptcopyout(sopt, &optval, sizeof optval); 2510 break; 2511 case TCP_INFO: 2512 tcp_fill_info(tp, &ti); 2513 INP_WUNLOCK(inp); 2514 error = sooptcopyout(sopt, &ti, sizeof ti); 2515 break; 2516 case TCP_STATS: 2517 { 2518 #ifdef STATS 2519 int nheld; 2520 TYPEOF_MEMBER(struct statsblob, flags) sbflags = 0; 2521 2522 error = 0; 2523 socklen_t outsbsz = sopt->sopt_valsize; 2524 if (tp->t_stats == NULL) 2525 error = ENOENT; 2526 else if (outsbsz >= tp->t_stats->cursz) 2527 outsbsz = tp->t_stats->cursz; 2528 else if (outsbsz >= sizeof(struct statsblob)) 2529 outsbsz = sizeof(struct statsblob); 2530 else 2531 error = EINVAL; 2532 INP_WUNLOCK(inp); 2533 if (error) 2534 break; 2535 2536 sbp = sopt->sopt_val; 2537 nheld = atop(round_page(((vm_offset_t)sbp) + 2538 (vm_size_t)outsbsz) - trunc_page((vm_offset_t)sbp)); 2539 vm_page_t ma[nheld]; 2540 if (vm_fault_quick_hold_pages( 2541 &curproc->p_vmspace->vm_map, (vm_offset_t)sbp, 2542 outsbsz, VM_PROT_READ | VM_PROT_WRITE, ma, 2543 nheld) < 0) { 2544 error = EFAULT; 2545 break; 2546 } 2547 2548 if ((error = copyin_nofault(&(sbp->flags), &sbflags, 2549 SIZEOF_MEMBER(struct statsblob, flags)))) 2550 goto unhold; 2551 2552 INP_WLOCK_RECHECK(inp); 2553 error = stats_blob_snapshot(&sbp, outsbsz, tp->t_stats, 2554 sbflags | SB_CLONE_USRDSTNOFAULT); 2555 INP_WUNLOCK(inp); 2556 sopt->sopt_valsize = outsbsz; 2557 unhold: 2558 vm_page_unhold_pages(ma, nheld); 2559 #else 2560 INP_WUNLOCK(inp); 2561 error = EOPNOTSUPP; 2562 #endif /* !STATS */ 2563 break; 2564 } 2565 case TCP_CONGESTION: 2566 len = strlcpy(buf, CC_ALGO(tp)->name, TCP_CA_NAME_MAX); 2567 INP_WUNLOCK(inp); 2568 error = sooptcopyout(sopt, buf, len + 1); 2569 break; 2570 case TCP_MAXUNACKTIME: 2571 case TCP_KEEPIDLE: 2572 case TCP_KEEPINTVL: 2573 case TCP_KEEPINIT: 2574 case TCP_KEEPCNT: 2575 switch (sopt->sopt_name) { 2576 case TCP_MAXUNACKTIME: 2577 ui = TP_MAXUNACKTIME(tp) / hz; 2578 break; 2579 case TCP_KEEPIDLE: 2580 ui = TP_KEEPIDLE(tp) / hz; 2581 break; 2582 case TCP_KEEPINTVL: 2583 ui = TP_KEEPINTVL(tp) / hz; 2584 break; 2585 case TCP_KEEPINIT: 2586 ui = TP_KEEPINIT(tp) / hz; 2587 break; 2588 case TCP_KEEPCNT: 2589 ui = TP_KEEPCNT(tp); 2590 break; 2591 } 2592 INP_WUNLOCK(inp); 2593 error = sooptcopyout(sopt, &ui, sizeof(ui)); 2594 break; 2595 #ifdef TCPPCAP 2596 case TCP_PCAP_OUT: 2597 case TCP_PCAP_IN: 2598 optval = tcp_pcap_get_sock_max( 2599 (sopt->sopt_name == TCP_PCAP_OUT) ? 2600 &(tp->t_outpkts) : &(tp->t_inpkts)); 2601 INP_WUNLOCK(inp); 2602 error = sooptcopyout(sopt, &optval, sizeof optval); 2603 break; 2604 #endif 2605 case TCP_FASTOPEN: 2606 optval = tp->t_flags & TF_FASTOPEN; 2607 INP_WUNLOCK(inp); 2608 error = sooptcopyout(sopt, &optval, sizeof optval); 2609 break; 2610 #ifdef TCP_BLACKBOX 2611 case TCP_LOG: 2612 optval = tcp_get_bblog_state(tp); 2613 INP_WUNLOCK(inp); 2614 error = sooptcopyout(sopt, &optval, sizeof(optval)); 2615 break; 2616 case TCP_LOGBUF: 2617 /* tcp_log_getlogbuf() does INP_WUNLOCK(inp) */ 2618 error = tcp_log_getlogbuf(sopt, tp); 2619 break; 2620 case TCP_LOGID: 2621 len = tcp_log_get_id(tp, buf); 2622 INP_WUNLOCK(inp); 2623 error = sooptcopyout(sopt, buf, len + 1); 2624 break; 2625 case TCP_LOGDUMP: 2626 case TCP_LOGDUMPID: 2627 INP_WUNLOCK(inp); 2628 error = EINVAL; 2629 break; 2630 #endif 2631 #ifdef KERN_TLS 2632 case TCP_TXTLS_MODE: 2633 error = ktls_get_tx_mode(so, &optval); 2634 INP_WUNLOCK(inp); 2635 if (error == 0) 2636 error = sooptcopyout(sopt, &optval, 2637 sizeof(optval)); 2638 break; 2639 case TCP_RXTLS_MODE: 2640 error = ktls_get_rx_mode(so, &optval); 2641 INP_WUNLOCK(inp); 2642 if (error == 0) 2643 error = sooptcopyout(sopt, &optval, 2644 sizeof(optval)); 2645 break; 2646 #endif 2647 default: 2648 INP_WUNLOCK(inp); 2649 error = ENOPROTOOPT; 2650 break; 2651 } 2652 break; 2653 } 2654 return (error); 2655 } 2656 #undef INP_WLOCK_RECHECK 2657 #undef INP_WLOCK_RECHECK_CLEANUP 2658 2659 /* 2660 * Initiate (or continue) disconnect. 2661 * If embryonic state, just send reset (once). 2662 * If in ``let data drain'' option and linger null, just drop. 2663 * Otherwise (hard), mark socket disconnecting and drop 2664 * current input data; switch states based on user close, and 2665 * send segment to peer (with FIN). 2666 */ 2667 static void 2668 tcp_disconnect(struct tcpcb *tp) 2669 { 2670 struct inpcb *inp = tptoinpcb(tp); 2671 struct socket *so = tptosocket(tp); 2672 2673 NET_EPOCH_ASSERT(); 2674 INP_WLOCK_ASSERT(inp); 2675 2676 /* 2677 * Neither tcp_close() nor tcp_drop() should return NULL, as the 2678 * socket is still open. 2679 */ 2680 if (tp->t_state < TCPS_ESTABLISHED && 2681 !(tp->t_state > TCPS_LISTEN && (tp->t_flags & TF_FASTOPEN))) { 2682 tp = tcp_close(tp); 2683 KASSERT(tp != NULL, 2684 ("tcp_disconnect: tcp_close() returned NULL")); 2685 } else if ((so->so_options & SO_LINGER) && so->so_linger == 0) { 2686 tp = tcp_drop(tp, 0); 2687 KASSERT(tp != NULL, 2688 ("tcp_disconnect: tcp_drop() returned NULL")); 2689 } else { 2690 soisdisconnecting(so); 2691 sbflush(&so->so_rcv); 2692 tcp_usrclosed(tp); 2693 if (!(inp->inp_flags & INP_DROPPED)) 2694 /* Ignore stack's drop request, we already at it. */ 2695 (void)tcp_output_nodrop(tp); 2696 } 2697 } 2698 2699 /* 2700 * User issued close, and wish to trail through shutdown states: 2701 * if never received SYN, just forget it. If got a SYN from peer, 2702 * but haven't sent FIN, then go to FIN_WAIT_1 state to send peer a FIN. 2703 * If already got a FIN from peer, then almost done; go to LAST_ACK 2704 * state. In all other cases, have already sent FIN to peer (e.g. 2705 * after PRU_SHUTDOWN), and just have to play tedious game waiting 2706 * for peer to send FIN or not respond to keep-alives, etc. 2707 * We can let the user exit from the close as soon as the FIN is acked. 2708 */ 2709 static void 2710 tcp_usrclosed(struct tcpcb *tp) 2711 { 2712 2713 NET_EPOCH_ASSERT(); 2714 INP_WLOCK_ASSERT(tptoinpcb(tp)); 2715 2716 switch (tp->t_state) { 2717 case TCPS_LISTEN: 2718 #ifdef TCP_OFFLOAD 2719 tcp_offload_listen_stop(tp); 2720 #endif 2721 tcp_state_change(tp, TCPS_CLOSED); 2722 /* FALLTHROUGH */ 2723 case TCPS_CLOSED: 2724 tp = tcp_close(tp); 2725 /* 2726 * tcp_close() should never return NULL here as the socket is 2727 * still open. 2728 */ 2729 KASSERT(tp != NULL, 2730 ("tcp_usrclosed: tcp_close() returned NULL")); 2731 break; 2732 2733 case TCPS_SYN_SENT: 2734 case TCPS_SYN_RECEIVED: 2735 tp->t_flags |= TF_NEEDFIN; 2736 break; 2737 2738 case TCPS_ESTABLISHED: 2739 tcp_state_change(tp, TCPS_FIN_WAIT_1); 2740 break; 2741 2742 case TCPS_CLOSE_WAIT: 2743 tcp_state_change(tp, TCPS_LAST_ACK); 2744 break; 2745 } 2746 if (tp->t_acktime == 0) 2747 tp->t_acktime = ticks; 2748 if (tp->t_state >= TCPS_FIN_WAIT_2) { 2749 tcp_free_sackholes(tp); 2750 soisdisconnected(tptosocket(tp)); 2751 /* Prevent the connection hanging in FIN_WAIT_2 forever. */ 2752 if (tp->t_state == TCPS_FIN_WAIT_2) { 2753 int timeout; 2754 2755 timeout = (tcp_fast_finwait2_recycle) ? 2756 tcp_finwait2_timeout : TP_MAXIDLE(tp); 2757 tcp_timer_activate(tp, TT_2MSL, timeout); 2758 } 2759 } 2760 } 2761 2762 #ifdef DDB 2763 static void 2764 db_print_indent(int indent) 2765 { 2766 int i; 2767 2768 for (i = 0; i < indent; i++) 2769 db_printf(" "); 2770 } 2771 2772 static void 2773 db_print_tstate(int t_state) 2774 { 2775 2776 switch (t_state) { 2777 case TCPS_CLOSED: 2778 db_printf("TCPS_CLOSED"); 2779 return; 2780 2781 case TCPS_LISTEN: 2782 db_printf("TCPS_LISTEN"); 2783 return; 2784 2785 case TCPS_SYN_SENT: 2786 db_printf("TCPS_SYN_SENT"); 2787 return; 2788 2789 case TCPS_SYN_RECEIVED: 2790 db_printf("TCPS_SYN_RECEIVED"); 2791 return; 2792 2793 case TCPS_ESTABLISHED: 2794 db_printf("TCPS_ESTABLISHED"); 2795 return; 2796 2797 case TCPS_CLOSE_WAIT: 2798 db_printf("TCPS_CLOSE_WAIT"); 2799 return; 2800 2801 case TCPS_FIN_WAIT_1: 2802 db_printf("TCPS_FIN_WAIT_1"); 2803 return; 2804 2805 case TCPS_CLOSING: 2806 db_printf("TCPS_CLOSING"); 2807 return; 2808 2809 case TCPS_LAST_ACK: 2810 db_printf("TCPS_LAST_ACK"); 2811 return; 2812 2813 case TCPS_FIN_WAIT_2: 2814 db_printf("TCPS_FIN_WAIT_2"); 2815 return; 2816 2817 case TCPS_TIME_WAIT: 2818 db_printf("TCPS_TIME_WAIT"); 2819 return; 2820 2821 default: 2822 db_printf("unknown"); 2823 return; 2824 } 2825 } 2826 2827 static void 2828 db_print_tflags(u_int t_flags) 2829 { 2830 int comma; 2831 2832 comma = 0; 2833 if (t_flags & TF_ACKNOW) { 2834 db_printf("%sTF_ACKNOW", comma ? ", " : ""); 2835 comma = 1; 2836 } 2837 if (t_flags & TF_DELACK) { 2838 db_printf("%sTF_DELACK", comma ? ", " : ""); 2839 comma = 1; 2840 } 2841 if (t_flags & TF_NODELAY) { 2842 db_printf("%sTF_NODELAY", comma ? ", " : ""); 2843 comma = 1; 2844 } 2845 if (t_flags & TF_NOOPT) { 2846 db_printf("%sTF_NOOPT", comma ? ", " : ""); 2847 comma = 1; 2848 } 2849 if (t_flags & TF_SENTFIN) { 2850 db_printf("%sTF_SENTFIN", comma ? ", " : ""); 2851 comma = 1; 2852 } 2853 if (t_flags & TF_REQ_SCALE) { 2854 db_printf("%sTF_REQ_SCALE", comma ? ", " : ""); 2855 comma = 1; 2856 } 2857 if (t_flags & TF_RCVD_SCALE) { 2858 db_printf("%sTF_RECVD_SCALE", comma ? ", " : ""); 2859 comma = 1; 2860 } 2861 if (t_flags & TF_REQ_TSTMP) { 2862 db_printf("%sTF_REQ_TSTMP", comma ? ", " : ""); 2863 comma = 1; 2864 } 2865 if (t_flags & TF_RCVD_TSTMP) { 2866 db_printf("%sTF_RCVD_TSTMP", comma ? ", " : ""); 2867 comma = 1; 2868 } 2869 if (t_flags & TF_SACK_PERMIT) { 2870 db_printf("%sTF_SACK_PERMIT", comma ? ", " : ""); 2871 comma = 1; 2872 } 2873 if (t_flags & TF_NEEDSYN) { 2874 db_printf("%sTF_NEEDSYN", comma ? ", " : ""); 2875 comma = 1; 2876 } 2877 if (t_flags & TF_NEEDFIN) { 2878 db_printf("%sTF_NEEDFIN", comma ? ", " : ""); 2879 comma = 1; 2880 } 2881 if (t_flags & TF_NOPUSH) { 2882 db_printf("%sTF_NOPUSH", comma ? ", " : ""); 2883 comma = 1; 2884 } 2885 if (t_flags & TF_PREVVALID) { 2886 db_printf("%sTF_PREVVALID", comma ? ", " : ""); 2887 comma = 1; 2888 } 2889 if (t_flags & TF_WAKESOR) { 2890 db_printf("%sTF_WAKESOR", comma ? ", " : ""); 2891 comma = 1; 2892 } 2893 if (t_flags & TF_GPUTINPROG) { 2894 db_printf("%sTF_GPUTINPROG", comma ? ", " : ""); 2895 comma = 1; 2896 } 2897 if (t_flags & TF_MORETOCOME) { 2898 db_printf("%sTF_MORETOCOME", comma ? ", " : ""); 2899 comma = 1; 2900 } 2901 if (t_flags & TF_SONOTCONN) { 2902 db_printf("%sTF_SONOTCONN", comma ? ", " : ""); 2903 comma = 1; 2904 } 2905 if (t_flags & TF_LASTIDLE) { 2906 db_printf("%sTF_LASTIDLE", comma ? ", " : ""); 2907 comma = 1; 2908 } 2909 if (t_flags & TF_RXWIN0SENT) { 2910 db_printf("%sTF_RXWIN0SENT", comma ? ", " : ""); 2911 comma = 1; 2912 } 2913 if (t_flags & TF_FASTRECOVERY) { 2914 db_printf("%sTF_FASTRECOVERY", comma ? ", " : ""); 2915 comma = 1; 2916 } 2917 if (t_flags & TF_WASFRECOVERY) { 2918 db_printf("%sTF_WASFRECOVERY", comma ? ", " : ""); 2919 comma = 1; 2920 } 2921 if (t_flags & TF_SIGNATURE) { 2922 db_printf("%sTF_SIGNATURE", comma ? ", " : ""); 2923 comma = 1; 2924 } 2925 if (t_flags & TF_FORCEDATA) { 2926 db_printf("%sTF_FORCEDATA", comma ? ", " : ""); 2927 comma = 1; 2928 } 2929 if (t_flags & TF_TSO) { 2930 db_printf("%sTF_TSO", comma ? ", " : ""); 2931 comma = 1; 2932 } 2933 if (t_flags & TF_TOE) { 2934 db_printf("%sTF_TOE", comma ? ", " : ""); 2935 comma = 1; 2936 } 2937 if (t_flags & TF_CLOSED) { 2938 db_printf("%sTF_CLOSED", comma ? ", " : ""); 2939 comma = 1; 2940 } 2941 if (t_flags & TF_SENTSYN) { 2942 db_printf("%sTF_SENTSYN", comma ? ", " : ""); 2943 comma = 1; 2944 } 2945 if (t_flags & TF_LRD) { 2946 db_printf("%sTF_LRD", comma ? ", " : ""); 2947 comma = 1; 2948 } 2949 if (t_flags & TF_CONGRECOVERY) { 2950 db_printf("%sTF_CONGRECOVERY", comma ? ", " : ""); 2951 comma = 1; 2952 } 2953 if (t_flags & TF_WASCRECOVERY) { 2954 db_printf("%sTF_WASCRECOVERY", comma ? ", " : ""); 2955 comma = 1; 2956 } 2957 if (t_flags & TF_FASTOPEN) { 2958 db_printf("%sTF_FASTOPEN", comma ? ", " : ""); 2959 comma = 1; 2960 } 2961 } 2962 2963 static void 2964 db_print_tflags2(u_int t_flags2) 2965 { 2966 int comma; 2967 2968 comma = 0; 2969 if (t_flags2 & TF2_PLPMTU_BLACKHOLE) { 2970 db_printf("%sTF2_PLPMTU_BLACKHOLE", comma ? ", " : ""); 2971 comma = 1; 2972 } 2973 if (t_flags2 & TF2_PLPMTU_PMTUD) { 2974 db_printf("%sTF2_PLPMTU_PMTUD", comma ? ", " : ""); 2975 comma = 1; 2976 } 2977 if (t_flags2 & TF2_PLPMTU_MAXSEGSNT) { 2978 db_printf("%sTF2_PLPMTU_MAXSEGSNT", comma ? ", " : ""); 2979 comma = 1; 2980 } 2981 if (t_flags2 & TF2_LOG_AUTO) { 2982 db_printf("%sTF2_LOG_AUTO", comma ? ", " : ""); 2983 comma = 1; 2984 } 2985 if (t_flags2 & TF2_DROP_AF_DATA) { 2986 db_printf("%sTF2_DROP_AF_DATA", comma ? ", " : ""); 2987 comma = 1; 2988 } 2989 if (t_flags2 & TF2_ECN_PERMIT) { 2990 db_printf("%sTF2_ECN_PERMIT", comma ? ", " : ""); 2991 comma = 1; 2992 } 2993 if (t_flags2 & TF2_ECN_SND_CWR) { 2994 db_printf("%sTF2_ECN_SND_CWR", comma ? ", " : ""); 2995 comma = 1; 2996 } 2997 if (t_flags2 & TF2_ECN_SND_ECE) { 2998 db_printf("%sTF2_ECN_SND_ECE", comma ? ", " : ""); 2999 comma = 1; 3000 } 3001 if (t_flags2 & TF2_ACE_PERMIT) { 3002 db_printf("%sTF2_ACE_PERMIT", comma ? ", " : ""); 3003 comma = 1; 3004 } 3005 if (t_flags2 & TF2_HPTS_CPU_SET) { 3006 db_printf("%sTF2_HPTS_CPU_SET", comma ? ", " : ""); 3007 comma = 1; 3008 } 3009 if (t_flags2 & TF2_FBYTES_COMPLETE) { 3010 db_printf("%sTF2_FBYTES_COMPLETE", comma ? ", " : ""); 3011 comma = 1; 3012 } 3013 if (t_flags2 & TF2_ECN_USE_ECT1) { 3014 db_printf("%sTF2_ECN_USE_ECT1", comma ? ", " : ""); 3015 comma = 1; 3016 } 3017 if (t_flags2 & TF2_TCP_ACCOUNTING) { 3018 db_printf("%sTF2_TCP_ACCOUNTING", comma ? ", " : ""); 3019 comma = 1; 3020 } 3021 if (t_flags2 & TF2_HPTS_CALLS) { 3022 db_printf("%sTF2_HPTS_CALLS", comma ? ", " : ""); 3023 comma = 1; 3024 } 3025 if (t_flags2 & TF2_MBUF_L_ACKS) { 3026 db_printf("%sTF2_MBUF_L_ACKS", comma ? ", " : ""); 3027 comma = 1; 3028 } 3029 if (t_flags2 & TF2_MBUF_ACKCMP) { 3030 db_printf("%sTF2_MBUF_ACKCMP", comma ? ", " : ""); 3031 comma = 1; 3032 } 3033 if (t_flags2 & TF2_SUPPORTS_MBUFQ) { 3034 db_printf("%sTF2_SUPPORTS_MBUFQ", comma ? ", " : ""); 3035 comma = 1; 3036 } 3037 if (t_flags2 & TF2_MBUF_QUEUE_READY) { 3038 db_printf("%sTF2_MBUF_QUEUE_READY", comma ? ", " : ""); 3039 comma = 1; 3040 } 3041 if (t_flags2 & TF2_DONT_SACK_QUEUE) { 3042 db_printf("%sTF2_DONT_SACK_QUEUE", comma ? ", " : ""); 3043 comma = 1; 3044 } 3045 if (t_flags2 & TF2_CANNOT_DO_ECN) { 3046 db_printf("%sTF2_CANNOT_DO_ECN", comma ? ", " : ""); 3047 comma = 1; 3048 } 3049 if (t_flags2 & TF2_PROC_SACK_PROHIBIT) { 3050 db_printf("%sTF2_PROC_SACK_PROHIBIT", comma ? ", " : ""); 3051 comma = 1; 3052 } 3053 if (t_flags2 & TF2_IPSEC_TSO) { 3054 db_printf("%sTF2_IPSEC_TSO", comma ? ", " : ""); 3055 comma = 1; 3056 } 3057 if (t_flags2 & TF2_NO_ISS_CHECK) { 3058 db_printf("%sTF2_NO_ISS_CHECK", comma ? ", " : ""); 3059 comma = 1; 3060 } 3061 } 3062 3063 static void 3064 db_print_toobflags(char t_oobflags) 3065 { 3066 int comma; 3067 3068 comma = 0; 3069 if (t_oobflags & TCPOOB_HAVEDATA) { 3070 db_printf("%sTCPOOB_HAVEDATA", comma ? ", " : ""); 3071 comma = 1; 3072 } 3073 if (t_oobflags & TCPOOB_HADDATA) { 3074 db_printf("%sTCPOOB_HADDATA", comma ? ", " : ""); 3075 comma = 1; 3076 } 3077 } 3078 3079 static void 3080 db_print_tcpcb(struct tcpcb *tp, const char *name, int indent) 3081 { 3082 3083 db_print_indent(indent); 3084 db_printf("%s at %p\n", name, tp); 3085 3086 indent += 2; 3087 3088 db_print_indent(indent); 3089 db_printf("t_segq first: %p t_segqlen: %d t_dupacks: %d\n", 3090 TAILQ_FIRST(&tp->t_segq), tp->t_segqlen, tp->t_dupacks); 3091 3092 db_print_indent(indent); 3093 db_printf("t_callout: %p t_timers: %p\n", 3094 &tp->t_callout, &tp->t_timers); 3095 3096 db_print_indent(indent); 3097 db_printf("t_state: %d (", tp->t_state); 3098 db_print_tstate(tp->t_state); 3099 db_printf(")\n"); 3100 3101 db_print_indent(indent); 3102 db_printf("t_flags: 0x%x (", tp->t_flags); 3103 db_print_tflags(tp->t_flags); 3104 db_printf(")\n"); 3105 3106 db_print_indent(indent); 3107 db_printf("t_flags2: 0x%x (", tp->t_flags2); 3108 db_print_tflags2(tp->t_flags2); 3109 db_printf(")\n"); 3110 3111 db_print_indent(indent); 3112 db_printf("snd_una: 0x%08x snd_max: 0x%08x snd_nxt: 0x%08x\n", 3113 tp->snd_una, tp->snd_max, tp->snd_nxt); 3114 3115 db_print_indent(indent); 3116 db_printf("snd_up: 0x%08x snd_wl1: 0x%08x snd_wl2: 0x%08x\n", 3117 tp->snd_up, tp->snd_wl1, tp->snd_wl2); 3118 3119 db_print_indent(indent); 3120 db_printf("iss: 0x%08x irs: 0x%08x rcv_nxt: 0x%08x\n", 3121 tp->iss, tp->irs, tp->rcv_nxt); 3122 3123 db_print_indent(indent); 3124 db_printf("rcv_adv: 0x%08x rcv_wnd: %u rcv_up: 0x%08x\n", 3125 tp->rcv_adv, tp->rcv_wnd, tp->rcv_up); 3126 3127 db_print_indent(indent); 3128 db_printf("snd_wnd: %u snd_cwnd: %u\n", 3129 tp->snd_wnd, tp->snd_cwnd); 3130 3131 db_print_indent(indent); 3132 db_printf("snd_ssthresh: %u snd_recover: " 3133 "0x%08x\n", tp->snd_ssthresh, tp->snd_recover); 3134 3135 db_print_indent(indent); 3136 db_printf("t_rcvtime: %u t_startime: %u\n", 3137 tp->t_rcvtime, tp->t_starttime); 3138 3139 db_print_indent(indent); 3140 db_printf("t_rttime: %u t_rtsq: 0x%08x\n", 3141 tp->t_rtttime, tp->t_rtseq); 3142 3143 db_print_indent(indent); 3144 db_printf("t_rxtcur: %d t_maxseg: %u t_srtt: %d\n", 3145 tp->t_rxtcur, tp->t_maxseg, tp->t_srtt); 3146 3147 db_print_indent(indent); 3148 db_printf("t_rttvar: %d t_rxtshift: %d t_rttmin: %u\n", 3149 tp->t_rttvar, tp->t_rxtshift, tp->t_rttmin); 3150 3151 db_print_indent(indent); 3152 db_printf("t_rttupdated: %u max_sndwnd: %u t_softerror: %d\n", 3153 tp->t_rttupdated, tp->max_sndwnd, tp->t_softerror); 3154 3155 db_print_indent(indent); 3156 db_printf("t_oobflags: 0x%x (", tp->t_oobflags); 3157 db_print_toobflags(tp->t_oobflags); 3158 db_printf(") t_iobc: 0x%02x\n", tp->t_iobc); 3159 3160 db_print_indent(indent); 3161 db_printf("snd_scale: %u rcv_scale: %u request_r_scale: %u\n", 3162 tp->snd_scale, tp->rcv_scale, tp->request_r_scale); 3163 3164 db_print_indent(indent); 3165 db_printf("ts_recent: %u ts_recent_age: %u\n", 3166 tp->ts_recent, tp->ts_recent_age); 3167 3168 db_print_indent(indent); 3169 db_printf("ts_offset: %u last_ack_sent: 0x%08x snd_cwnd_prev: " 3170 "%u\n", tp->ts_offset, tp->last_ack_sent, tp->snd_cwnd_prev); 3171 3172 db_print_indent(indent); 3173 db_printf("snd_ssthresh_prev: %u snd_recover_prev: 0x%08x " 3174 "t_badrxtwin: %u\n", tp->snd_ssthresh_prev, 3175 tp->snd_recover_prev, tp->t_badrxtwin); 3176 3177 db_print_indent(indent); 3178 db_printf("snd_numholes: %d snd_holes first: %p\n", 3179 tp->snd_numholes, TAILQ_FIRST(&tp->snd_holes)); 3180 3181 db_print_indent(indent); 3182 db_printf("snd_fack: 0x%08x rcv_numsacks: %d\n", 3183 tp->snd_fack, tp->rcv_numsacks); 3184 3185 /* Skip sackblks, sackhint. */ 3186 3187 db_print_indent(indent); 3188 db_printf("t_rttlow: %d rfbuf_ts: %u rfbuf_cnt: %d\n", 3189 tp->t_rttlow, tp->rfbuf_ts, tp->rfbuf_cnt); 3190 } 3191 3192 DB_SHOW_COMMAND(tcpcb, db_show_tcpcb) 3193 { 3194 struct tcpcb *tp; 3195 3196 if (!have_addr) { 3197 db_printf("usage: show tcpcb <addr>\n"); 3198 return; 3199 } 3200 tp = (struct tcpcb *)addr; 3201 3202 db_print_tcpcb(tp, "tcpcb", 0); 3203 } 3204 #endif 3205