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