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