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