1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1982, 1986, 1988, 1993 5 * The Regents of the University of California. 6 * Copyright (c) 2006-2007 Robert N. M. Watson 7 * Copyright (c) 2010-2011 Juniper Networks, Inc. 8 * All rights reserved. 9 * 10 * Portions of this software were developed by Robert N. M. Watson under 11 * contract to Juniper Networks, Inc. 12 * 13 * Redistribution and use in source and binary forms, with or without 14 * modification, are permitted provided that the following conditions 15 * are met: 16 * 1. Redistributions of source code must retain the above copyright 17 * notice, this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright 19 * notice, this list of conditions and the following disclaimer in the 20 * documentation and/or other materials provided with the distribution. 21 * 3. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * From: @(#)tcp_usrreq.c 8.2 (Berkeley) 1/3/94 38 */ 39 40 #include <sys/cdefs.h> 41 #include "opt_ddb.h" 42 #include "opt_inet.h" 43 #include "opt_inet6.h" 44 #include "opt_ipsec.h" 45 #include "opt_kern_tls.h" 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/arb.h> 50 #include <sys/limits.h> 51 #include <sys/malloc.h> 52 #include <sys/refcount.h> 53 #include <sys/kernel.h> 54 #include <sys/ktls.h> 55 #include <sys/qmath.h> 56 #include <sys/sysctl.h> 57 #include <sys/mbuf.h> 58 #ifdef INET6 59 #include <sys/domain.h> 60 #endif /* INET6 */ 61 #include <sys/socket.h> 62 #include <sys/socketvar.h> 63 #include <sys/protosw.h> 64 #include <sys/proc.h> 65 #include <sys/jail.h> 66 #include <sys/stats.h> 67 68 #ifdef DDB 69 #include <ddb/ddb.h> 70 #endif 71 72 #include <net/if.h> 73 #include <net/if_var.h> 74 #include <net/route.h> 75 #include <net/vnet.h> 76 77 #include <netinet/in.h> 78 #include <netinet/in_kdtrace.h> 79 #include <netinet/in_pcb.h> 80 #include <netinet/in_systm.h> 81 #include <netinet/in_var.h> 82 #include <netinet/ip.h> 83 #include <netinet/ip_var.h> 84 #ifdef INET6 85 #include <netinet/ip6.h> 86 #include <netinet6/in6_pcb.h> 87 #include <netinet6/ip6_var.h> 88 #include <netinet6/scope6_var.h> 89 #endif 90 #include <netinet/tcp.h> 91 #include <netinet/tcp_fsm.h> 92 #include <netinet/tcp_seq.h> 93 #include <netinet/tcp_timer.h> 94 #include <netinet/tcp_var.h> 95 #include <netinet/tcp_log_buf.h> 96 #include <netinet/tcpip.h> 97 #include <netinet/cc/cc.h> 98 #include <netinet/tcp_fastopen.h> 99 #include <netinet/tcp_hpts.h> 100 #ifdef TCPPCAP 101 #include <netinet/tcp_pcap.h> 102 #endif 103 #ifdef TCP_OFFLOAD 104 #include <netinet/tcp_offload.h> 105 #endif 106 #include <netipsec/ipsec_support.h> 107 108 #include <vm/vm.h> 109 #include <vm/vm_param.h> 110 #include <vm/pmap.h> 111 #include <vm/vm_extern.h> 112 #include <vm/vm_map.h> 113 #include <vm/vm_page.h> 114 115 /* 116 * TCP protocol interface to socket abstraction. 117 */ 118 #ifdef INET 119 static int tcp_connect(struct tcpcb *, struct sockaddr_in *, 120 struct thread *td); 121 #endif /* INET */ 122 #ifdef INET6 123 static int tcp6_connect(struct tcpcb *, struct sockaddr_in6 *, 124 struct thread *td); 125 #endif /* INET6 */ 126 static void tcp_disconnect(struct tcpcb *); 127 static void tcp_usrclosed(struct tcpcb *); 128 static void tcp_fill_info(const struct tcpcb *, struct tcp_info *); 129 130 static int tcp_pru_options_support(struct tcpcb *tp, int flags); 131 132 static void 133 tcp_bblog_pru(struct tcpcb *tp, uint32_t pru, int error) 134 { 135 struct tcp_log_buffer *lgb; 136 137 KASSERT(tp != NULL, ("tcp_bblog_pru: tp == NULL")); 138 INP_WLOCK_ASSERT(tptoinpcb(tp)); 139 if (tcp_bblogging_on(tp)) { 140 lgb = tcp_log_event(tp, NULL, NULL, NULL, TCP_LOG_PRU, error, 141 0, NULL, false, NULL, NULL, 0, NULL); 142 } else { 143 lgb = NULL; 144 } 145 if (lgb != NULL) { 146 if (error >= 0) { 147 lgb->tlb_errno = (uint32_t)error; 148 } 149 lgb->tlb_flex1 = pru; 150 } 151 } 152 153 /* 154 * TCP attaches to socket via pru_attach(), reserving space, 155 * and an internet control block. 156 */ 157 static int 158 tcp_usr_attach(struct socket *so, int proto, struct thread *td) 159 { 160 struct inpcb *inp; 161 struct tcpcb *tp = NULL; 162 int error; 163 164 inp = sotoinpcb(so); 165 KASSERT(inp == NULL, ("tcp_usr_attach: inp != NULL")); 166 167 error = soreserve(so, V_tcp_sendspace, V_tcp_recvspace); 168 if (error) 169 goto out; 170 171 so->so_rcv.sb_flags |= SB_AUTOSIZE; 172 so->so_snd.sb_flags |= SB_AUTOSIZE; 173 error = in_pcballoc(so, &V_tcbinfo); 174 if (error) 175 goto out; 176 inp = sotoinpcb(so); 177 tp = tcp_newtcpcb(inp, NULL); 178 if (tp == NULL) { 179 error = ENOBUFS; 180 in_pcbfree(inp); 181 goto out; 182 } 183 tp->t_state = TCPS_CLOSED; 184 tcp_bblog_pru(tp, PRU_ATTACH, error); 185 INP_WUNLOCK(inp); 186 TCPSTATES_INC(TCPS_CLOSED); 187 out: 188 TCP_PROBE2(debug__user, tp, PRU_ATTACH); 189 return (error); 190 } 191 192 /* 193 * tcp_usr_detach is called when the socket layer loses its final reference 194 * to the socket, be it a file descriptor reference, a reference from TCP, 195 * etc. At this point, there is only one case in which we will keep around 196 * inpcb state: time wait. 197 */ 198 static void 199 tcp_usr_detach(struct socket *so) 200 { 201 struct inpcb *inp; 202 struct tcpcb *tp; 203 204 inp = sotoinpcb(so); 205 KASSERT(inp != NULL, ("%s: inp == NULL", __func__)); 206 INP_WLOCK(inp); 207 KASSERT(so->so_pcb == inp && inp->inp_socket == so, 208 ("%s: socket %p inp %p mismatch", __func__, so, inp)); 209 210 tp = intotcpcb(inp); 211 212 KASSERT(inp->inp_flags & INP_DROPPED || 213 tp->t_state < TCPS_SYN_SENT, 214 ("%s: inp %p not dropped or embryonic", __func__, inp)); 215 216 tcp_discardcb(tp); 217 in_pcbfree(inp); 218 } 219 220 #ifdef INET 221 /* 222 * Give the socket an address. 223 */ 224 static int 225 tcp_usr_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 226 { 227 int error = 0; 228 struct inpcb *inp; 229 struct tcpcb *tp; 230 struct sockaddr_in *sinp; 231 232 inp = sotoinpcb(so); 233 KASSERT(inp != NULL, ("tcp_usr_bind: inp == NULL")); 234 INP_WLOCK(inp); 235 if (inp->inp_flags & INP_DROPPED) { 236 INP_WUNLOCK(inp); 237 return (EINVAL); 238 } 239 tp = intotcpcb(inp); 240 241 sinp = (struct sockaddr_in *)nam; 242 if (nam->sa_family != AF_INET) { 243 /* 244 * Preserve compatibility with old programs. 245 */ 246 if (nam->sa_family != AF_UNSPEC || 247 nam->sa_len < offsetof(struct sockaddr_in, sin_zero) || 248 sinp->sin_addr.s_addr != INADDR_ANY) { 249 error = EAFNOSUPPORT; 250 goto out; 251 } 252 nam->sa_family = AF_INET; 253 } 254 if (nam->sa_len != sizeof(*sinp)) { 255 error = EINVAL; 256 goto out; 257 } 258 /* 259 * Must check for multicast addresses and disallow binding 260 * to them. 261 */ 262 if (IN_MULTICAST(ntohl(sinp->sin_addr.s_addr))) { 263 error = EAFNOSUPPORT; 264 goto out; 265 } 266 INP_HASH_WLOCK(&V_tcbinfo); 267 error = in_pcbbind(inp, sinp, td->td_ucred); 268 INP_HASH_WUNLOCK(&V_tcbinfo); 269 out: 270 tcp_bblog_pru(tp, PRU_BIND, error); 271 TCP_PROBE2(debug__user, tp, PRU_BIND); 272 INP_WUNLOCK(inp); 273 274 return (error); 275 } 276 #endif /* INET */ 277 278 #ifdef INET6 279 static int 280 tcp6_usr_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 281 { 282 int error = 0; 283 struct inpcb *inp; 284 struct tcpcb *tp; 285 struct sockaddr_in6 *sin6; 286 u_char vflagsav; 287 288 inp = sotoinpcb(so); 289 KASSERT(inp != NULL, ("tcp6_usr_bind: inp == NULL")); 290 INP_WLOCK(inp); 291 if (inp->inp_flags & INP_DROPPED) { 292 INP_WUNLOCK(inp); 293 return (EINVAL); 294 } 295 tp = intotcpcb(inp); 296 297 vflagsav = inp->inp_vflag; 298 299 sin6 = (struct sockaddr_in6 *)nam; 300 if (nam->sa_family != AF_INET6) { 301 error = EAFNOSUPPORT; 302 goto out; 303 } 304 if (nam->sa_len != sizeof(*sin6)) { 305 error = EINVAL; 306 goto out; 307 } 308 /* 309 * Must check for multicast addresses and disallow binding 310 * to them. 311 */ 312 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 313 error = EAFNOSUPPORT; 314 goto out; 315 } 316 317 INP_HASH_WLOCK(&V_tcbinfo); 318 inp->inp_vflag &= ~INP_IPV4; 319 inp->inp_vflag |= INP_IPV6; 320 #ifdef INET 321 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 322 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 323 inp->inp_vflag |= INP_IPV4; 324 else if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 325 struct sockaddr_in sin; 326 327 in6_sin6_2_sin(&sin, sin6); 328 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 329 error = EAFNOSUPPORT; 330 INP_HASH_WUNLOCK(&V_tcbinfo); 331 goto out; 332 } 333 inp->inp_vflag |= INP_IPV4; 334 inp->inp_vflag &= ~INP_IPV6; 335 error = in_pcbbind(inp, &sin, td->td_ucred); 336 INP_HASH_WUNLOCK(&V_tcbinfo); 337 goto out; 338 } 339 } 340 #endif 341 error = in6_pcbbind(inp, sin6, td->td_ucred); 342 INP_HASH_WUNLOCK(&V_tcbinfo); 343 out: 344 if (error != 0) 345 inp->inp_vflag = vflagsav; 346 tcp_bblog_pru(tp, PRU_BIND, error); 347 TCP_PROBE2(debug__user, tp, PRU_BIND); 348 INP_WUNLOCK(inp); 349 return (error); 350 } 351 #endif /* INET6 */ 352 353 #ifdef INET 354 /* 355 * Prepare to accept connections. 356 */ 357 static int 358 tcp_usr_listen(struct socket *so, int backlog, struct thread *td) 359 { 360 int error = 0; 361 struct inpcb *inp; 362 struct tcpcb *tp; 363 364 inp = sotoinpcb(so); 365 KASSERT(inp != NULL, ("tcp_usr_listen: inp == NULL")); 366 INP_WLOCK(inp); 367 if (inp->inp_flags & INP_DROPPED) { 368 INP_WUNLOCK(inp); 369 return (EINVAL); 370 } 371 tp = intotcpcb(inp); 372 373 SOCK_LOCK(so); 374 error = solisten_proto_check(so); 375 if (error != 0) { 376 SOCK_UNLOCK(so); 377 goto out; 378 } 379 if (inp->inp_lport == 0) { 380 INP_HASH_WLOCK(&V_tcbinfo); 381 error = in_pcbbind(inp, NULL, td->td_ucred); 382 INP_HASH_WUNLOCK(&V_tcbinfo); 383 } 384 if (error == 0) { 385 tcp_state_change(tp, TCPS_LISTEN); 386 solisten_proto(so, backlog); 387 #ifdef TCP_OFFLOAD 388 if ((so->so_options & SO_NO_OFFLOAD) == 0) 389 tcp_offload_listen_start(tp); 390 #endif 391 } else { 392 solisten_proto_abort(so); 393 } 394 SOCK_UNLOCK(so); 395 396 if (IS_FASTOPEN(tp->t_flags)) 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 (IS_FASTOPEN(tp->t_flags)) 454 tp->t_tfo_pending = tcp_fastopen_alloc_counter(); 455 456 if (error != 0) 457 inp->inp_vflag = vflagsav; 458 459 out: 460 tcp_bblog_pru(tp, PRU_LISTEN, error); 461 TCP_PROBE2(debug__user, tp, PRU_LISTEN); 462 INP_WUNLOCK(inp); 463 return (error); 464 } 465 #endif /* INET6 */ 466 467 #ifdef INET 468 /* 469 * Initiate connection to peer. 470 * Create a template for use in transmissions on this connection. 471 * Enter SYN_SENT state, and mark socket as connecting. 472 * Start keep-alive timer, and seed output sequence space. 473 * Send initial segment on connection. 474 */ 475 static int 476 tcp_usr_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 477 { 478 struct epoch_tracker et; 479 int error = 0; 480 struct inpcb *inp; 481 struct tcpcb *tp; 482 struct sockaddr_in *sinp; 483 484 inp = sotoinpcb(so); 485 KASSERT(inp != NULL, ("tcp_usr_connect: inp == NULL")); 486 INP_WLOCK(inp); 487 if (inp->inp_flags & INP_DROPPED) { 488 INP_WUNLOCK(inp); 489 return (ECONNREFUSED); 490 } 491 tp = intotcpcb(inp); 492 493 sinp = (struct sockaddr_in *)nam; 494 if (nam->sa_family != AF_INET) { 495 error = EAFNOSUPPORT; 496 goto out; 497 } 498 if (nam->sa_len != sizeof (*sinp)) { 499 error = EINVAL; 500 goto out; 501 } 502 /* 503 * Must disallow TCP ``connections'' to multicast addresses. 504 */ 505 if (IN_MULTICAST(ntohl(sinp->sin_addr.s_addr))) { 506 error = EAFNOSUPPORT; 507 goto out; 508 } 509 if (ntohl(sinp->sin_addr.s_addr) == INADDR_BROADCAST) { 510 error = EACCES; 511 goto out; 512 } 513 if ((error = prison_remote_ip4(td->td_ucred, &sinp->sin_addr)) != 0) 514 goto out; 515 if (SOLISTENING(so)) { 516 error = EOPNOTSUPP; 517 goto out; 518 } 519 NET_EPOCH_ENTER(et); 520 if ((error = tcp_connect(tp, sinp, td)) != 0) 521 goto out_in_epoch; 522 #ifdef TCP_OFFLOAD 523 if (registered_toedevs > 0 && 524 (so->so_options & SO_NO_OFFLOAD) == 0 && 525 (error = tcp_offload_connect(so, nam)) == 0) 526 goto out_in_epoch; 527 #endif 528 tcp_timer_activate(tp, TT_KEEP, TP_KEEPINIT(tp)); 529 error = tcp_output(tp); 530 KASSERT(error >= 0, ("TCP stack %s requested tcp_drop(%p) at connect()" 531 ", error code %d", tp->t_fb->tfb_tcp_block_name, tp, -error)); 532 out_in_epoch: 533 NET_EPOCH_EXIT(et); 534 out: 535 tcp_bblog_pru(tp, PRU_CONNECT, error); 536 TCP_PROBE2(debug__user, tp, PRU_CONNECT); 537 INP_WUNLOCK(inp); 538 return (error); 539 } 540 #endif /* INET */ 541 542 #ifdef INET6 543 static int 544 tcp6_usr_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 545 { 546 struct epoch_tracker et; 547 int error = 0; 548 struct inpcb *inp; 549 struct tcpcb *tp; 550 struct sockaddr_in6 *sin6; 551 u_int8_t incflagsav; 552 u_char vflagsav; 553 554 inp = sotoinpcb(so); 555 KASSERT(inp != NULL, ("tcp6_usr_connect: inp == NULL")); 556 INP_WLOCK(inp); 557 if (inp->inp_flags & INP_DROPPED) { 558 INP_WUNLOCK(inp); 559 return (ECONNREFUSED); 560 } 561 tp = intotcpcb(inp); 562 563 vflagsav = inp->inp_vflag; 564 incflagsav = inp->inp_inc.inc_flags; 565 566 sin6 = (struct sockaddr_in6 *)nam; 567 if (nam->sa_family != AF_INET6) { 568 error = EAFNOSUPPORT; 569 goto out; 570 } 571 if (nam->sa_len != sizeof (*sin6)) { 572 error = EINVAL; 573 goto out; 574 } 575 /* 576 * Must disallow TCP ``connections'' to multicast addresses. 577 */ 578 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 579 error = EAFNOSUPPORT; 580 goto out; 581 } 582 if (SOLISTENING(so)) { 583 error = EINVAL; 584 goto out; 585 } 586 #ifdef INET 587 /* 588 * XXXRW: Some confusion: V4/V6 flags relate to binding, and 589 * therefore probably require the hash lock, which isn't held here. 590 * Is this a significant problem? 591 */ 592 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 593 struct sockaddr_in sin; 594 595 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0) { 596 error = EINVAL; 597 goto out; 598 } 599 if ((inp->inp_vflag & INP_IPV4) == 0) { 600 error = EAFNOSUPPORT; 601 goto out; 602 } 603 604 in6_sin6_2_sin(&sin, sin6); 605 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 606 error = EAFNOSUPPORT; 607 goto out; 608 } 609 if (ntohl(sin.sin_addr.s_addr) == INADDR_BROADCAST) { 610 error = EACCES; 611 goto out; 612 } 613 if ((error = prison_remote_ip4(td->td_ucred, 614 &sin.sin_addr)) != 0) 615 goto out; 616 inp->inp_vflag |= INP_IPV4; 617 inp->inp_vflag &= ~INP_IPV6; 618 NET_EPOCH_ENTER(et); 619 if ((error = tcp_connect(tp, &sin, td)) != 0) 620 goto out_in_epoch; 621 #ifdef TCP_OFFLOAD 622 if (registered_toedevs > 0 && 623 (so->so_options & SO_NO_OFFLOAD) == 0 && 624 (error = tcp_offload_connect(so, nam)) == 0) 625 goto out_in_epoch; 626 #endif 627 error = tcp_output(tp); 628 goto out_in_epoch; 629 } else { 630 if ((inp->inp_vflag & INP_IPV6) == 0) { 631 error = EAFNOSUPPORT; 632 goto out; 633 } 634 } 635 #endif 636 if ((error = prison_remote_ip6(td->td_ucred, &sin6->sin6_addr)) != 0) 637 goto out; 638 inp->inp_vflag &= ~INP_IPV4; 639 inp->inp_vflag |= INP_IPV6; 640 inp->inp_inc.inc_flags |= INC_ISIPV6; 641 NET_EPOCH_ENTER(et); 642 if ((error = tcp6_connect(tp, sin6, td)) != 0) 643 goto out_in_epoch; 644 #ifdef TCP_OFFLOAD 645 if (registered_toedevs > 0 && 646 (so->so_options & SO_NO_OFFLOAD) == 0 && 647 (error = tcp_offload_connect(so, nam)) == 0) 648 goto out_in_epoch; 649 #endif 650 tcp_timer_activate(tp, TT_KEEP, TP_KEEPINIT(tp)); 651 error = tcp_output(tp); 652 out_in_epoch: 653 NET_EPOCH_EXIT(et); 654 out: 655 KASSERT(error >= 0, ("TCP stack %s requested tcp_drop(%p) at connect()" 656 ", error code %d", tp->t_fb->tfb_tcp_block_name, tp, -error)); 657 /* 658 * If the implicit bind in the connect call fails, restore 659 * the flags we modified. 660 */ 661 if (error != 0 && inp->inp_lport == 0) { 662 inp->inp_vflag = vflagsav; 663 inp->inp_inc.inc_flags = incflagsav; 664 } 665 666 tcp_bblog_pru(tp, PRU_CONNECT, error); 667 TCP_PROBE2(debug__user, tp, PRU_CONNECT); 668 INP_WUNLOCK(inp); 669 return (error); 670 } 671 #endif /* INET6 */ 672 673 /* 674 * Initiate disconnect from peer. 675 * If connection never passed embryonic stage, just drop; 676 * else if don't need to let data drain, then can just drop anyways, 677 * else have to begin TCP shutdown process: mark socket disconnecting, 678 * drain unread data, state switch to reflect user close, and 679 * send segment (e.g. FIN) to peer. Socket will be really disconnected 680 * when peer sends FIN and acks ours. 681 * 682 * SHOULD IMPLEMENT LATER PRU_CONNECT VIA REALLOC TCPCB. 683 */ 684 static int 685 tcp_usr_disconnect(struct socket *so) 686 { 687 struct inpcb *inp; 688 struct tcpcb *tp = NULL; 689 struct epoch_tracker et; 690 int error = 0; 691 692 NET_EPOCH_ENTER(et); 693 inp = sotoinpcb(so); 694 KASSERT(inp != NULL, ("tcp_usr_disconnect: inp == NULL")); 695 INP_WLOCK(inp); 696 if (inp->inp_flags & INP_DROPPED) { 697 INP_WUNLOCK(inp); 698 NET_EPOCH_EXIT(et); 699 return (ECONNRESET); 700 } 701 tp = intotcpcb(inp); 702 703 if (tp->t_state == TCPS_TIME_WAIT) 704 goto out; 705 tcp_disconnect(tp); 706 out: 707 tcp_bblog_pru(tp, PRU_DISCONNECT, error); 708 TCP_PROBE2(debug__user, tp, PRU_DISCONNECT); 709 INP_WUNLOCK(inp); 710 NET_EPOCH_EXIT(et); 711 return (error); 712 } 713 714 #ifdef INET 715 /* 716 * Accept a connection. Essentially all the work is done at higher levels; 717 * just return the address of the peer, storing through addr. 718 */ 719 static int 720 tcp_usr_accept(struct socket *so, struct sockaddr **nam) 721 { 722 int error = 0; 723 struct inpcb *inp; 724 struct tcpcb *tp; 725 struct in_addr addr; 726 in_port_t port = 0; 727 728 inp = sotoinpcb(so); 729 KASSERT(inp != NULL, ("tcp_usr_accept: inp == NULL")); 730 INP_WLOCK(inp); 731 if (inp->inp_flags & INP_DROPPED) { 732 INP_WUNLOCK(inp); 733 return (ECONNABORTED); 734 } 735 tp = intotcpcb(inp); 736 737 if (so->so_state & SS_ISDISCONNECTED) { 738 error = ECONNABORTED; 739 goto out; 740 } 741 /* 742 * We inline in_getpeeraddr and COMMON_END here, so that we can 743 * copy the data of interest and defer the malloc until after we 744 * release the lock. 745 */ 746 port = inp->inp_fport; 747 addr = inp->inp_faddr; 748 749 out: 750 tcp_bblog_pru(tp, PRU_ACCEPT, error); 751 TCP_PROBE2(debug__user, tp, PRU_ACCEPT); 752 INP_WUNLOCK(inp); 753 if (error == 0) 754 *nam = in_sockaddr(port, &addr); 755 return error; 756 } 757 #endif /* INET */ 758 759 #ifdef INET6 760 static int 761 tcp6_usr_accept(struct socket *so, struct sockaddr **nam) 762 { 763 struct inpcb *inp; 764 int error = 0; 765 struct tcpcb *tp; 766 struct in_addr addr; 767 struct in6_addr addr6; 768 struct epoch_tracker et; 769 in_port_t port = 0; 770 int v4 = 0; 771 772 inp = sotoinpcb(so); 773 KASSERT(inp != NULL, ("tcp6_usr_accept: inp == NULL")); 774 NET_EPOCH_ENTER(et); /* XXXMT Why is this needed? */ 775 INP_WLOCK(inp); 776 if (inp->inp_flags & INP_DROPPED) { 777 INP_WUNLOCK(inp); 778 NET_EPOCH_EXIT(et); 779 return (ECONNABORTED); 780 } 781 tp = intotcpcb(inp); 782 783 if (so->so_state & SS_ISDISCONNECTED) { 784 error = ECONNABORTED; 785 goto out; 786 } 787 /* 788 * We inline in6_mapped_peeraddr and COMMON_END here, so that we can 789 * copy the data of interest and defer the malloc until after we 790 * release the lock. 791 */ 792 if (inp->inp_vflag & INP_IPV4) { 793 v4 = 1; 794 port = inp->inp_fport; 795 addr = inp->inp_faddr; 796 } else { 797 port = inp->inp_fport; 798 addr6 = inp->in6p_faddr; 799 } 800 801 out: 802 tcp_bblog_pru(tp, PRU_ACCEPT, error); 803 TCP_PROBE2(debug__user, tp, PRU_ACCEPT); 804 INP_WUNLOCK(inp); 805 NET_EPOCH_EXIT(et); 806 if (error == 0) { 807 if (v4) 808 *nam = in6_v4mapsin6_sockaddr(port, &addr); 809 else 810 *nam = in6_sockaddr(port, &addr6); 811 } 812 return error; 813 } 814 #endif /* INET6 */ 815 816 /* 817 * Mark the connection as being incapable of further output. 818 */ 819 static int 820 tcp_usr_shutdown(struct socket *so) 821 { 822 int error = 0; 823 struct inpcb *inp; 824 struct tcpcb *tp; 825 struct epoch_tracker et; 826 827 inp = sotoinpcb(so); 828 KASSERT(inp != NULL, ("inp == NULL")); 829 INP_WLOCK(inp); 830 if (inp->inp_flags & INP_DROPPED) { 831 INP_WUNLOCK(inp); 832 return (ECONNRESET); 833 } 834 tp = intotcpcb(inp); 835 836 NET_EPOCH_ENTER(et); 837 socantsendmore(so); 838 tcp_usrclosed(tp); 839 if (!(inp->inp_flags & INP_DROPPED)) 840 error = tcp_output_nodrop(tp); 841 tcp_bblog_pru(tp, PRU_SHUTDOWN, error); 842 TCP_PROBE2(debug__user, tp, PRU_SHUTDOWN); 843 error = tcp_unlock_or_drop(tp, error); 844 NET_EPOCH_EXIT(et); 845 846 return (error); 847 } 848 849 /* 850 * After a receive, possibly send window update to peer. 851 */ 852 static int 853 tcp_usr_rcvd(struct socket *so, int flags) 854 { 855 struct epoch_tracker et; 856 struct inpcb *inp; 857 struct tcpcb *tp; 858 int outrv = 0, error = 0; 859 860 inp = sotoinpcb(so); 861 KASSERT(inp != NULL, ("tcp_usr_rcvd: inp == NULL")); 862 INP_WLOCK(inp); 863 if (inp->inp_flags & INP_DROPPED) { 864 INP_WUNLOCK(inp); 865 return (ECONNRESET); 866 } 867 tp = intotcpcb(inp); 868 869 NET_EPOCH_ENTER(et); 870 /* 871 * For passively-created TFO connections, don't attempt a window 872 * update while still in SYN_RECEIVED as this may trigger an early 873 * SYN|ACK. It is preferable to have the SYN|ACK be sent along with 874 * application response data, or failing that, when the DELACK timer 875 * expires. 876 */ 877 if (IS_FASTOPEN(tp->t_flags) && 878 (tp->t_state == TCPS_SYN_RECEIVED)) 879 goto out; 880 #ifdef TCP_OFFLOAD 881 if (tp->t_flags & TF_TOE) 882 tcp_offload_rcvd(tp); 883 else 884 #endif 885 outrv = tcp_output_nodrop(tp); 886 out: 887 tcp_bblog_pru(tp, PRU_RCVD, error); 888 TCP_PROBE2(debug__user, tp, PRU_RCVD); 889 (void) tcp_unlock_or_drop(tp, outrv); 890 NET_EPOCH_EXIT(et); 891 return (error); 892 } 893 894 /* 895 * Do a send by putting data in output queue and updating urgent 896 * marker if URG set. Possibly send more data. Unlike the other 897 * pru_*() routines, the mbuf chains are our responsibility. We 898 * must either enqueue them or free them. The other pru_* routines 899 * generally are caller-frees. 900 */ 901 static int 902 tcp_usr_send(struct socket *so, int flags, struct mbuf *m, 903 struct sockaddr *nam, struct mbuf *control, struct thread *td) 904 { 905 struct epoch_tracker et; 906 int error = 0; 907 struct inpcb *inp; 908 struct tcpcb *tp; 909 #ifdef INET 910 #ifdef INET6 911 struct sockaddr_in sin; 912 #endif 913 struct sockaddr_in *sinp; 914 #endif 915 #ifdef INET6 916 struct sockaddr_in6 *sin6; 917 int isipv6; 918 #endif 919 u_int8_t incflagsav; 920 u_char vflagsav; 921 bool restoreflags; 922 923 inp = sotoinpcb(so); 924 KASSERT(inp != NULL, ("tcp_usr_send: inp == NULL")); 925 INP_WLOCK(inp); 926 if (inp->inp_flags & INP_DROPPED) { 927 if (m != NULL && (flags & PRUS_NOTREADY) == 0) 928 m_freem(m); 929 INP_WUNLOCK(inp); 930 return (ECONNRESET); 931 } 932 tp = intotcpcb(inp); 933 934 vflagsav = inp->inp_vflag; 935 incflagsav = inp->inp_inc.inc_flags; 936 restoreflags = false; 937 938 NET_EPOCH_ENTER(et); 939 if (control != NULL) { 940 /* TCP doesn't do control messages (rights, creds, etc) */ 941 if (control->m_len > 0) { 942 m_freem(control); 943 error = EINVAL; 944 goto out; 945 } 946 m_freem(control); /* empty control, just free it */ 947 } 948 949 if ((flags & PRUS_OOB) != 0 && 950 (error = tcp_pru_options_support(tp, PRUS_OOB)) != 0) 951 goto out; 952 953 if (nam != NULL && tp->t_state < TCPS_SYN_SENT) { 954 if (tp->t_state == TCPS_LISTEN) { 955 error = EINVAL; 956 goto out; 957 } 958 switch (nam->sa_family) { 959 #ifdef INET 960 case AF_INET: 961 sinp = (struct sockaddr_in *)nam; 962 if (sinp->sin_len != sizeof(struct sockaddr_in)) { 963 error = EINVAL; 964 goto out; 965 } 966 if ((inp->inp_vflag & INP_IPV6) != 0) { 967 error = EAFNOSUPPORT; 968 goto out; 969 } 970 if (IN_MULTICAST(ntohl(sinp->sin_addr.s_addr))) { 971 error = EAFNOSUPPORT; 972 goto out; 973 } 974 if (ntohl(sinp->sin_addr.s_addr) == INADDR_BROADCAST) { 975 error = EACCES; 976 goto out; 977 } 978 if ((error = prison_remote_ip4(td->td_ucred, 979 &sinp->sin_addr))) 980 goto out; 981 #ifdef INET6 982 isipv6 = 0; 983 #endif 984 break; 985 #endif /* INET */ 986 #ifdef INET6 987 case AF_INET6: 988 sin6 = (struct sockaddr_in6 *)nam; 989 if (sin6->sin6_len != sizeof(*sin6)) { 990 error = EINVAL; 991 goto out; 992 } 993 if ((inp->inp_vflag & INP_IPV6PROTO) == 0) { 994 error = EAFNOSUPPORT; 995 goto out; 996 } 997 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 998 error = EAFNOSUPPORT; 999 goto out; 1000 } 1001 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 1002 #ifdef INET 1003 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0) { 1004 error = EINVAL; 1005 goto out; 1006 } 1007 if ((inp->inp_vflag & INP_IPV4) == 0) { 1008 error = EAFNOSUPPORT; 1009 goto out; 1010 } 1011 restoreflags = true; 1012 inp->inp_vflag &= ~INP_IPV6; 1013 sinp = &sin; 1014 in6_sin6_2_sin(sinp, sin6); 1015 if (IN_MULTICAST( 1016 ntohl(sinp->sin_addr.s_addr))) { 1017 error = EAFNOSUPPORT; 1018 goto out; 1019 } 1020 if ((error = prison_remote_ip4(td->td_ucred, 1021 &sinp->sin_addr))) 1022 goto out; 1023 isipv6 = 0; 1024 #else /* !INET */ 1025 error = EAFNOSUPPORT; 1026 goto out; 1027 #endif /* INET */ 1028 } else { 1029 if ((inp->inp_vflag & INP_IPV6) == 0) { 1030 error = EAFNOSUPPORT; 1031 goto out; 1032 } 1033 restoreflags = true; 1034 inp->inp_vflag &= ~INP_IPV4; 1035 inp->inp_inc.inc_flags |= INC_ISIPV6; 1036 if ((error = prison_remote_ip6(td->td_ucred, 1037 &sin6->sin6_addr))) 1038 goto out; 1039 isipv6 = 1; 1040 } 1041 break; 1042 #endif /* INET6 */ 1043 default: 1044 error = EAFNOSUPPORT; 1045 goto out; 1046 } 1047 } 1048 if (!(flags & PRUS_OOB)) { 1049 if (tp->t_acktime == 0) 1050 tp->t_acktime = ticks; 1051 sbappendstream(&so->so_snd, m, flags); 1052 m = NULL; 1053 if (nam && tp->t_state < TCPS_SYN_SENT) { 1054 KASSERT(tp->t_state == TCPS_CLOSED, 1055 ("%s: tp %p is listening", __func__, tp)); 1056 1057 /* 1058 * Do implied connect if not yet connected, 1059 * initialize window to default value, and 1060 * initialize maxseg using peer's cached MSS. 1061 */ 1062 #ifdef INET6 1063 if (isipv6) 1064 error = tcp6_connect(tp, sin6, td); 1065 #endif /* INET6 */ 1066 #if defined(INET6) && defined(INET) 1067 else 1068 #endif 1069 #ifdef INET 1070 error = tcp_connect(tp, sinp, td); 1071 #endif 1072 /* 1073 * The bind operation in tcp_connect succeeded. We 1074 * no longer want to restore the flags if later 1075 * operations fail. 1076 */ 1077 if (error == 0 || inp->inp_lport != 0) 1078 restoreflags = false; 1079 1080 if (error) { 1081 /* m is freed if PRUS_NOTREADY is unset. */ 1082 sbflush(&so->so_snd); 1083 goto out; 1084 } 1085 if (IS_FASTOPEN(tp->t_flags)) 1086 tcp_fastopen_connect(tp); 1087 else { 1088 tp->snd_wnd = TTCP_CLIENT_SND_WND; 1089 tcp_mss(tp, -1); 1090 } 1091 } 1092 if (flags & PRUS_EOF) { 1093 /* 1094 * Close the send side of the connection after 1095 * the data is sent. 1096 */ 1097 socantsendmore(so); 1098 tcp_usrclosed(tp); 1099 } 1100 if (TCPS_HAVEESTABLISHED(tp->t_state) && 1101 ((tp->t_flags2 & TF2_FBYTES_COMPLETE) == 0) && 1102 (tp->t_fbyte_out == 0) && 1103 (so->so_snd.sb_ccc > 0)) { 1104 tp->t_fbyte_out = ticks; 1105 if (tp->t_fbyte_out == 0) 1106 tp->t_fbyte_out = 1; 1107 if (tp->t_fbyte_out && tp->t_fbyte_in) 1108 tp->t_flags2 |= TF2_FBYTES_COMPLETE; 1109 } 1110 if (!(inp->inp_flags & INP_DROPPED) && 1111 !(flags & PRUS_NOTREADY)) { 1112 if (flags & PRUS_MORETOCOME) 1113 tp->t_flags |= TF_MORETOCOME; 1114 error = tcp_output_nodrop(tp); 1115 if (flags & PRUS_MORETOCOME) 1116 tp->t_flags &= ~TF_MORETOCOME; 1117 } 1118 } else { 1119 /* 1120 * XXXRW: PRUS_EOF not implemented with PRUS_OOB? 1121 */ 1122 SOCKBUF_LOCK(&so->so_snd); 1123 if (sbspace(&so->so_snd) < -512) { 1124 SOCKBUF_UNLOCK(&so->so_snd); 1125 error = ENOBUFS; 1126 goto out; 1127 } 1128 /* 1129 * According to RFC961 (Assigned Protocols), 1130 * the urgent pointer points to the last octet 1131 * of urgent data. We continue, however, 1132 * to consider it to indicate the first octet 1133 * of data past the urgent section. 1134 * Otherwise, snd_up should be one lower. 1135 */ 1136 if (tp->t_acktime == 0) 1137 tp->t_acktime = ticks; 1138 sbappendstream_locked(&so->so_snd, m, flags); 1139 SOCKBUF_UNLOCK(&so->so_snd); 1140 m = NULL; 1141 if (nam && tp->t_state < TCPS_SYN_SENT) { 1142 /* 1143 * Do implied connect if not yet connected, 1144 * initialize window to default value, and 1145 * initialize maxseg using peer's cached MSS. 1146 */ 1147 1148 /* 1149 * Not going to contemplate SYN|URG 1150 */ 1151 if (IS_FASTOPEN(tp->t_flags)) 1152 tp->t_flags &= ~TF_FASTOPEN; 1153 #ifdef INET6 1154 if (isipv6) 1155 error = tcp6_connect(tp, sin6, td); 1156 #endif /* INET6 */ 1157 #if defined(INET6) && defined(INET) 1158 else 1159 #endif 1160 #ifdef INET 1161 error = tcp_connect(tp, sinp, td); 1162 #endif 1163 /* 1164 * The bind operation in tcp_connect succeeded. We 1165 * no longer want to restore the flags if later 1166 * operations fail. 1167 */ 1168 if (error == 0 || inp->inp_lport != 0) 1169 restoreflags = false; 1170 1171 if (error != 0) { 1172 /* m is freed if PRUS_NOTREADY is unset. */ 1173 sbflush(&so->so_snd); 1174 goto out; 1175 } 1176 tp->snd_wnd = TTCP_CLIENT_SND_WND; 1177 tcp_mss(tp, -1); 1178 } 1179 tp->snd_up = tp->snd_una + sbavail(&so->so_snd); 1180 if ((flags & PRUS_NOTREADY) == 0) { 1181 tp->t_flags |= TF_FORCEDATA; 1182 error = tcp_output_nodrop(tp); 1183 tp->t_flags &= ~TF_FORCEDATA; 1184 } 1185 } 1186 TCP_LOG_EVENT(tp, NULL, 1187 &inp->inp_socket->so_rcv, 1188 &inp->inp_socket->so_snd, 1189 TCP_LOG_USERSEND, error, 1190 0, NULL, false); 1191 1192 out: 1193 /* 1194 * In case of PRUS_NOTREADY, the caller or tcp_usr_ready() is 1195 * responsible for freeing memory. 1196 */ 1197 if (m != NULL && (flags & PRUS_NOTREADY) == 0) 1198 m_freem(m); 1199 1200 /* 1201 * If the request was unsuccessful and we changed flags, 1202 * restore the original flags. 1203 */ 1204 if (error != 0 && restoreflags) { 1205 inp->inp_vflag = vflagsav; 1206 inp->inp_inc.inc_flags = incflagsav; 1207 } 1208 tcp_bblog_pru(tp, (flags & PRUS_OOB) ? PRU_SENDOOB : 1209 ((flags & PRUS_EOF) ? PRU_SEND_EOF : PRU_SEND), error); 1210 TCP_PROBE2(debug__user, tp, (flags & PRUS_OOB) ? PRU_SENDOOB : 1211 ((flags & PRUS_EOF) ? PRU_SEND_EOF : PRU_SEND)); 1212 error = tcp_unlock_or_drop(tp, error); 1213 NET_EPOCH_EXIT(et); 1214 return (error); 1215 } 1216 1217 static int 1218 tcp_usr_ready(struct socket *so, struct mbuf *m, int count) 1219 { 1220 struct epoch_tracker et; 1221 struct inpcb *inp; 1222 struct tcpcb *tp; 1223 int error; 1224 1225 inp = sotoinpcb(so); 1226 INP_WLOCK(inp); 1227 if (inp->inp_flags & INP_DROPPED) { 1228 INP_WUNLOCK(inp); 1229 mb_free_notready(m, count); 1230 return (ECONNRESET); 1231 } 1232 tp = intotcpcb(inp); 1233 1234 SOCKBUF_LOCK(&so->so_snd); 1235 error = sbready(&so->so_snd, m, count); 1236 SOCKBUF_UNLOCK(&so->so_snd); 1237 if (error) { 1238 INP_WUNLOCK(inp); 1239 return (error); 1240 } 1241 NET_EPOCH_ENTER(et); 1242 error = tcp_output_unlock(tp); 1243 NET_EPOCH_EXIT(et); 1244 1245 return (error); 1246 } 1247 1248 /* 1249 * Abort the TCP. Drop the connection abruptly. 1250 */ 1251 static void 1252 tcp_usr_abort(struct socket *so) 1253 { 1254 struct inpcb *inp; 1255 struct tcpcb *tp; 1256 struct epoch_tracker et; 1257 1258 inp = sotoinpcb(so); 1259 KASSERT(inp != NULL, ("tcp_usr_abort: inp == NULL")); 1260 1261 NET_EPOCH_ENTER(et); 1262 INP_WLOCK(inp); 1263 KASSERT(inp->inp_socket != NULL, 1264 ("tcp_usr_abort: inp_socket == NULL")); 1265 1266 /* 1267 * If we still have full TCP state, and we're not dropped, drop. 1268 */ 1269 if (!(inp->inp_flags & INP_DROPPED)) { 1270 tp = intotcpcb(inp); 1271 tp = tcp_drop(tp, ECONNABORTED); 1272 if (tp == NULL) 1273 goto dropped; 1274 tcp_bblog_pru(tp, PRU_ABORT, 0); 1275 TCP_PROBE2(debug__user, tp, PRU_ABORT); 1276 } 1277 if (!(inp->inp_flags & INP_DROPPED)) { 1278 soref(so); 1279 inp->inp_flags |= INP_SOCKREF; 1280 } 1281 INP_WUNLOCK(inp); 1282 dropped: 1283 NET_EPOCH_EXIT(et); 1284 } 1285 1286 /* 1287 * TCP socket is closed. Start friendly disconnect. 1288 */ 1289 static void 1290 tcp_usr_close(struct socket *so) 1291 { 1292 struct inpcb *inp; 1293 struct tcpcb *tp; 1294 struct epoch_tracker et; 1295 1296 inp = sotoinpcb(so); 1297 KASSERT(inp != NULL, ("tcp_usr_close: inp == NULL")); 1298 1299 NET_EPOCH_ENTER(et); 1300 INP_WLOCK(inp); 1301 KASSERT(inp->inp_socket != NULL, 1302 ("tcp_usr_close: inp_socket == NULL")); 1303 1304 /* 1305 * If we are still connected and we're not dropped, initiate 1306 * a disconnect. 1307 */ 1308 if (!(inp->inp_flags & INP_DROPPED)) { 1309 tp = intotcpcb(inp); 1310 if (tp->t_state != TCPS_TIME_WAIT) { 1311 tp->t_flags |= TF_CLOSED; 1312 tcp_disconnect(tp); 1313 tcp_bblog_pru(tp, PRU_CLOSE, 0); 1314 TCP_PROBE2(debug__user, tp, PRU_CLOSE); 1315 } 1316 } 1317 if (!(inp->inp_flags & INP_DROPPED)) { 1318 soref(so); 1319 inp->inp_flags |= INP_SOCKREF; 1320 } 1321 INP_WUNLOCK(inp); 1322 NET_EPOCH_EXIT(et); 1323 } 1324 1325 static int 1326 tcp_pru_options_support(struct tcpcb *tp, int flags) 1327 { 1328 /* 1329 * If the specific TCP stack has a pru_options 1330 * specified then it does not always support 1331 * all the PRU_XX options and we must ask it. 1332 * If the function is not specified then all 1333 * of the PRU_XX options are supported. 1334 */ 1335 int ret = 0; 1336 1337 if (tp->t_fb->tfb_pru_options) { 1338 ret = (*tp->t_fb->tfb_pru_options)(tp, flags); 1339 } 1340 return (ret); 1341 } 1342 1343 /* 1344 * Receive out-of-band data. 1345 */ 1346 static int 1347 tcp_usr_rcvoob(struct socket *so, struct mbuf *m, int flags) 1348 { 1349 int error = 0; 1350 struct inpcb *inp; 1351 struct tcpcb *tp; 1352 1353 inp = sotoinpcb(so); 1354 KASSERT(inp != NULL, ("tcp_usr_rcvoob: inp == NULL")); 1355 INP_WLOCK(inp); 1356 if (inp->inp_flags & INP_DROPPED) { 1357 INP_WUNLOCK(inp); 1358 return (ECONNRESET); 1359 } 1360 tp = intotcpcb(inp); 1361 1362 error = tcp_pru_options_support(tp, PRUS_OOB); 1363 if (error) { 1364 goto out; 1365 } 1366 if ((so->so_oobmark == 0 && 1367 (so->so_rcv.sb_state & SBS_RCVATMARK) == 0) || 1368 so->so_options & SO_OOBINLINE || 1369 tp->t_oobflags & TCPOOB_HADDATA) { 1370 error = EINVAL; 1371 goto out; 1372 } 1373 if ((tp->t_oobflags & TCPOOB_HAVEDATA) == 0) { 1374 error = EWOULDBLOCK; 1375 goto out; 1376 } 1377 m->m_len = 1; 1378 *mtod(m, caddr_t) = tp->t_iobc; 1379 if ((flags & MSG_PEEK) == 0) 1380 tp->t_oobflags ^= (TCPOOB_HAVEDATA | TCPOOB_HADDATA); 1381 1382 out: 1383 tcp_bblog_pru(tp, PRU_RCVOOB, error); 1384 TCP_PROBE2(debug__user, tp, PRU_RCVOOB); 1385 INP_WUNLOCK(inp); 1386 return (error); 1387 } 1388 1389 #ifdef INET 1390 struct protosw tcp_protosw = { 1391 .pr_type = SOCK_STREAM, 1392 .pr_protocol = IPPROTO_TCP, 1393 .pr_flags = PR_CONNREQUIRED | PR_IMPLOPCL | PR_WANTRCVD | 1394 PR_CAPATTACH, 1395 .pr_ctloutput = tcp_ctloutput, 1396 .pr_abort = tcp_usr_abort, 1397 .pr_accept = tcp_usr_accept, 1398 .pr_attach = tcp_usr_attach, 1399 .pr_bind = tcp_usr_bind, 1400 .pr_connect = tcp_usr_connect, 1401 .pr_control = in_control, 1402 .pr_detach = tcp_usr_detach, 1403 .pr_disconnect = tcp_usr_disconnect, 1404 .pr_listen = tcp_usr_listen, 1405 .pr_peeraddr = in_getpeeraddr, 1406 .pr_rcvd = tcp_usr_rcvd, 1407 .pr_rcvoob = tcp_usr_rcvoob, 1408 .pr_send = tcp_usr_send, 1409 .pr_ready = tcp_usr_ready, 1410 .pr_shutdown = tcp_usr_shutdown, 1411 .pr_sockaddr = in_getsockaddr, 1412 .pr_sosetlabel = in_pcbsosetlabel, 1413 .pr_close = tcp_usr_close, 1414 }; 1415 #endif /* INET */ 1416 1417 #ifdef INET6 1418 struct protosw tcp6_protosw = { 1419 .pr_type = SOCK_STREAM, 1420 .pr_protocol = IPPROTO_TCP, 1421 .pr_flags = PR_CONNREQUIRED | PR_IMPLOPCL |PR_WANTRCVD | 1422 PR_CAPATTACH, 1423 .pr_ctloutput = tcp_ctloutput, 1424 .pr_abort = tcp_usr_abort, 1425 .pr_accept = tcp6_usr_accept, 1426 .pr_attach = tcp_usr_attach, 1427 .pr_bind = tcp6_usr_bind, 1428 .pr_connect = tcp6_usr_connect, 1429 .pr_control = in6_control, 1430 .pr_detach = tcp_usr_detach, 1431 .pr_disconnect = tcp_usr_disconnect, 1432 .pr_listen = tcp6_usr_listen, 1433 .pr_peeraddr = in6_mapped_peeraddr, 1434 .pr_rcvd = tcp_usr_rcvd, 1435 .pr_rcvoob = tcp_usr_rcvoob, 1436 .pr_send = tcp_usr_send, 1437 .pr_ready = tcp_usr_ready, 1438 .pr_shutdown = tcp_usr_shutdown, 1439 .pr_sockaddr = in6_mapped_sockaddr, 1440 .pr_sosetlabel = in_pcbsosetlabel, 1441 .pr_close = tcp_usr_close, 1442 }; 1443 #endif /* INET6 */ 1444 1445 #ifdef INET 1446 /* 1447 * Common subroutine to open a TCP connection to remote host specified 1448 * by struct sockaddr_in. Call in_pcbconnect() to choose local host address 1449 * and assign a local port number and install the inpcb into the hash. 1450 * Initialize connection parameters and enter SYN-SENT state. 1451 */ 1452 static int 1453 tcp_connect(struct tcpcb *tp, struct sockaddr_in *sin, struct thread *td) 1454 { 1455 struct inpcb *inp = tptoinpcb(tp); 1456 struct socket *so = tptosocket(tp); 1457 int error; 1458 1459 NET_EPOCH_ASSERT(); 1460 INP_WLOCK_ASSERT(inp); 1461 1462 if (__predict_false((so->so_state & 1463 (SS_ISCONNECTING | SS_ISCONNECTED | SS_ISDISCONNECTING | 1464 SS_ISDISCONNECTED)) != 0)) 1465 return (EISCONN); 1466 1467 INP_HASH_WLOCK(&V_tcbinfo); 1468 error = in_pcbconnect(inp, sin, td->td_ucred, true); 1469 INP_HASH_WUNLOCK(&V_tcbinfo); 1470 if (error != 0) 1471 return (error); 1472 1473 /* 1474 * Compute window scaling to request: 1475 * Scale to fit into sweet spot. See tcp_syncache.c. 1476 * XXX: This should move to tcp_output(). 1477 */ 1478 while (tp->request_r_scale < TCP_MAX_WINSHIFT && 1479 (TCP_MAXWIN << tp->request_r_scale) < sb_max) 1480 tp->request_r_scale++; 1481 1482 soisconnecting(so); 1483 TCPSTAT_INC(tcps_connattempt); 1484 tcp_state_change(tp, TCPS_SYN_SENT); 1485 tp->iss = tcp_new_isn(&inp->inp_inc); 1486 if (tp->t_flags & TF_REQ_TSTMP) 1487 tp->ts_offset = tcp_new_ts_offset(&inp->inp_inc); 1488 tcp_sendseqinit(tp); 1489 1490 return (0); 1491 } 1492 #endif /* INET */ 1493 1494 #ifdef INET6 1495 static int 1496 tcp6_connect(struct tcpcb *tp, struct sockaddr_in6 *sin6, struct thread *td) 1497 { 1498 struct inpcb *inp = tptoinpcb(tp); 1499 struct socket *so = tptosocket(tp); 1500 int error; 1501 1502 NET_EPOCH_ASSERT(); 1503 INP_WLOCK_ASSERT(inp); 1504 1505 if (__predict_false((so->so_state & 1506 (SS_ISCONNECTING | SS_ISCONNECTED)) != 0)) 1507 return (EISCONN); 1508 1509 INP_HASH_WLOCK(&V_tcbinfo); 1510 error = in6_pcbconnect(inp, sin6, td->td_ucred, true); 1511 INP_HASH_WUNLOCK(&V_tcbinfo); 1512 if (error != 0) 1513 return (error); 1514 1515 /* Compute window scaling to request. */ 1516 while (tp->request_r_scale < TCP_MAX_WINSHIFT && 1517 (TCP_MAXWIN << tp->request_r_scale) < sb_max) 1518 tp->request_r_scale++; 1519 1520 soisconnecting(so); 1521 TCPSTAT_INC(tcps_connattempt); 1522 tcp_state_change(tp, TCPS_SYN_SENT); 1523 tp->iss = tcp_new_isn(&inp->inp_inc); 1524 if (tp->t_flags & TF_REQ_TSTMP) 1525 tp->ts_offset = tcp_new_ts_offset(&inp->inp_inc); 1526 tcp_sendseqinit(tp); 1527 1528 return (0); 1529 } 1530 #endif /* INET6 */ 1531 1532 /* 1533 * Export TCP internal state information via a struct tcp_info, based on the 1534 * Linux 2.6 API. Not ABI compatible as our constants are mapped differently 1535 * (TCP state machine, etc). We export all information using FreeBSD-native 1536 * constants -- for example, the numeric values for tcpi_state will differ 1537 * from Linux. 1538 */ 1539 void 1540 tcp_fill_info(const struct tcpcb *tp, struct tcp_info *ti) 1541 { 1542 1543 INP_LOCK_ASSERT(tptoinpcb(tp)); 1544 bzero(ti, sizeof(*ti)); 1545 1546 ti->tcpi_state = tp->t_state; 1547 if ((tp->t_flags & TF_REQ_TSTMP) && (tp->t_flags & TF_RCVD_TSTMP)) 1548 ti->tcpi_options |= TCPI_OPT_TIMESTAMPS; 1549 if (tp->t_flags & TF_SACK_PERMIT) 1550 ti->tcpi_options |= TCPI_OPT_SACK; 1551 if ((tp->t_flags & TF_REQ_SCALE) && (tp->t_flags & TF_RCVD_SCALE)) { 1552 ti->tcpi_options |= TCPI_OPT_WSCALE; 1553 ti->tcpi_snd_wscale = tp->snd_scale; 1554 ti->tcpi_rcv_wscale = tp->rcv_scale; 1555 } 1556 switch (tp->t_flags2 & (TF2_ECN_PERMIT | TF2_ACE_PERMIT)) { 1557 case TF2_ECN_PERMIT: 1558 ti->tcpi_options |= TCPI_OPT_ECN; 1559 break; 1560 case TF2_ACE_PERMIT: 1561 /* FALLTHROUGH */ 1562 case TF2_ECN_PERMIT | TF2_ACE_PERMIT: 1563 ti->tcpi_options |= TCPI_OPT_ACE; 1564 break; 1565 default: 1566 break; 1567 } 1568 if (IS_FASTOPEN(tp->t_flags)) 1569 ti->tcpi_options |= TCPI_OPT_TFO; 1570 1571 ti->tcpi_rto = tp->t_rxtcur * tick; 1572 ti->tcpi_last_data_recv = ((uint32_t)ticks - tp->t_rcvtime) * tick; 1573 ti->tcpi_rtt = ((u_int64_t)tp->t_srtt * tick) >> TCP_RTT_SHIFT; 1574 ti->tcpi_rttvar = ((u_int64_t)tp->t_rttvar * tick) >> TCP_RTTVAR_SHIFT; 1575 1576 ti->tcpi_snd_ssthresh = tp->snd_ssthresh; 1577 ti->tcpi_snd_cwnd = tp->snd_cwnd; 1578 1579 /* 1580 * FreeBSD-specific extension fields for tcp_info. 1581 */ 1582 ti->tcpi_rcv_space = tp->rcv_wnd; 1583 ti->tcpi_rcv_nxt = tp->rcv_nxt; 1584 ti->tcpi_snd_wnd = tp->snd_wnd; 1585 ti->tcpi_snd_bwnd = 0; /* Unused, kept for compat. */ 1586 ti->tcpi_snd_nxt = tp->snd_nxt; 1587 ti->tcpi_snd_mss = tp->t_maxseg; 1588 ti->tcpi_rcv_mss = tp->t_maxseg; 1589 ti->tcpi_snd_rexmitpack = tp->t_sndrexmitpack; 1590 ti->tcpi_rcv_ooopack = tp->t_rcvoopack; 1591 ti->tcpi_snd_zerowin = tp->t_sndzerowin; 1592 ti->tcpi_snd_una = tp->snd_una; 1593 ti->tcpi_snd_max = tp->snd_max; 1594 ti->tcpi_rcv_numsacks = tp->rcv_numsacks; 1595 ti->tcpi_rcv_adv = tp->rcv_adv; 1596 ti->tcpi_dupacks = tp->t_dupacks; 1597 #ifdef TCP_OFFLOAD 1598 if (tp->t_flags & TF_TOE) { 1599 ti->tcpi_options |= TCPI_OPT_TOE; 1600 tcp_offload_tcp_info(tp, ti); 1601 } 1602 #endif 1603 /* 1604 * AccECN related counters. 1605 */ 1606 if ((tp->t_flags2 & (TF2_ECN_PERMIT | TF2_ACE_PERMIT)) == 1607 (TF2_ECN_PERMIT | TF2_ACE_PERMIT)) 1608 /* 1609 * Internal counter starts at 5 for AccECN 1610 * but 0 for RFC3168 ECN. 1611 */ 1612 ti->tcpi_delivered_ce = tp->t_scep - 5; 1613 else 1614 ti->tcpi_delivered_ce = tp->t_scep; 1615 ti->tcpi_received_ce = tp->t_rcep; 1616 } 1617 1618 /* 1619 * tcp_ctloutput() must drop the inpcb lock before performing copyin on 1620 * socket option arguments. When it re-acquires the lock after the copy, it 1621 * has to revalidate that the connection is still valid for the socket 1622 * option. 1623 */ 1624 #define INP_WLOCK_RECHECK_CLEANUP(inp, cleanup) do { \ 1625 INP_WLOCK(inp); \ 1626 if (inp->inp_flags & INP_DROPPED) { \ 1627 INP_WUNLOCK(inp); \ 1628 cleanup; \ 1629 return (ECONNRESET); \ 1630 } \ 1631 tp = intotcpcb(inp); \ 1632 } while(0) 1633 #define INP_WLOCK_RECHECK(inp) INP_WLOCK_RECHECK_CLEANUP((inp), /* noop */) 1634 1635 int 1636 tcp_ctloutput_set(struct inpcb *inp, struct sockopt *sopt) 1637 { 1638 struct socket *so = inp->inp_socket; 1639 struct tcpcb *tp = intotcpcb(inp); 1640 int error = 0; 1641 1642 MPASS(sopt->sopt_dir == SOPT_SET); 1643 INP_WLOCK_ASSERT(inp); 1644 KASSERT((inp->inp_flags & INP_DROPPED) == 0, 1645 ("inp_flags == %x", inp->inp_flags)); 1646 KASSERT(so != NULL, ("inp_socket == NULL")); 1647 1648 if (sopt->sopt_level != IPPROTO_TCP) { 1649 INP_WUNLOCK(inp); 1650 #ifdef INET6 1651 if (inp->inp_vflag & INP_IPV6PROTO) 1652 error = ip6_ctloutput(so, sopt); 1653 #endif 1654 #if defined(INET6) && defined(INET) 1655 else 1656 #endif 1657 #ifdef INET 1658 error = ip_ctloutput(so, sopt); 1659 #endif 1660 /* 1661 * When an IP-level socket option affects TCP, pass control 1662 * down to stack tfb_tcp_ctloutput, otherwise return what 1663 * IP level returned. 1664 */ 1665 switch (sopt->sopt_level) { 1666 #ifdef INET6 1667 case IPPROTO_IPV6: 1668 if ((inp->inp_vflag & INP_IPV6PROTO) == 0) 1669 return (error); 1670 switch (sopt->sopt_name) { 1671 case IPV6_TCLASS: 1672 /* Notify tcp stacks that care (e.g. RACK). */ 1673 break; 1674 case IPV6_USE_MIN_MTU: 1675 /* Update t_maxseg accordingly. */ 1676 break; 1677 default: 1678 return (error); 1679 } 1680 break; 1681 #endif 1682 #ifdef INET 1683 case IPPROTO_IP: 1684 switch (sopt->sopt_name) { 1685 case IP_TOS: 1686 inp->inp_ip_tos &= ~IPTOS_ECN_MASK; 1687 break; 1688 case IP_TTL: 1689 /* Notify tcp stacks that care (e.g. RACK). */ 1690 break; 1691 default: 1692 return (error); 1693 } 1694 break; 1695 #endif 1696 default: 1697 return (error); 1698 } 1699 INP_WLOCK_RECHECK(inp); 1700 } else if (sopt->sopt_name == TCP_FUNCTION_BLK) { 1701 /* 1702 * Protect the TCP option TCP_FUNCTION_BLK so 1703 * that a sub-function can *never* overwrite this. 1704 */ 1705 struct tcp_function_set fsn; 1706 struct tcp_function_block *blk; 1707 void *ptr = NULL; 1708 1709 INP_WUNLOCK(inp); 1710 error = sooptcopyin(sopt, &fsn, sizeof fsn, sizeof fsn); 1711 if (error) 1712 return (error); 1713 1714 INP_WLOCK_RECHECK(inp); 1715 1716 blk = find_and_ref_tcp_functions(&fsn); 1717 if (blk == NULL) { 1718 INP_WUNLOCK(inp); 1719 return (ENOENT); 1720 } 1721 if (tp->t_fb == blk) { 1722 /* You already have this */ 1723 refcount_release(&blk->tfb_refcnt); 1724 INP_WUNLOCK(inp); 1725 return (0); 1726 } 1727 if (blk->tfb_flags & TCP_FUNC_BEING_REMOVED) { 1728 refcount_release(&blk->tfb_refcnt); 1729 INP_WUNLOCK(inp); 1730 return (ENOENT); 1731 } 1732 error = (*blk->tfb_tcp_handoff_ok)(tp); 1733 if (error) { 1734 refcount_release(&blk->tfb_refcnt); 1735 INP_WUNLOCK(inp); 1736 return (error); 1737 } 1738 /* 1739 * Ensure the new stack takes ownership with a 1740 * clean slate on peak rate threshold. 1741 */ 1742 if (tp->t_fb->tfb_tcp_timer_stop_all != NULL) 1743 tp->t_fb->tfb_tcp_timer_stop_all(tp); 1744 if (blk->tfb_tcp_fb_init) { 1745 error = (*blk->tfb_tcp_fb_init)(tp, &ptr); 1746 if (error) { 1747 /* 1748 * Release the ref count the lookup 1749 * acquired. 1750 */ 1751 refcount_release(&blk->tfb_refcnt); 1752 /* 1753 * Now there is a chance that the 1754 * init() function mucked with some 1755 * things before it failed, such as 1756 * hpts or inp_flags2 or timer granularity. 1757 * It should not of, but lets give the old 1758 * stack a chance to reset to a known good state. 1759 */ 1760 if (tp->t_fb->tfb_switch_failed) { 1761 (*tp->t_fb->tfb_switch_failed)(tp); 1762 } 1763 goto err_out; 1764 } 1765 } 1766 if (tp->t_fb->tfb_tcp_fb_fini) { 1767 struct epoch_tracker et; 1768 /* 1769 * Tell the stack to cleanup with 0 i.e. 1770 * the tcb is not going away. 1771 */ 1772 NET_EPOCH_ENTER(et); 1773 (*tp->t_fb->tfb_tcp_fb_fini)(tp, 0); 1774 NET_EPOCH_EXIT(et); 1775 } 1776 /* 1777 * Release the old refcnt, the 1778 * lookup acquired a ref on the 1779 * new one already. 1780 */ 1781 refcount_release(&tp->t_fb->tfb_refcnt); 1782 /* 1783 * Set in the new stack. 1784 */ 1785 tp->t_fb = blk; 1786 tp->t_fb_ptr = ptr; 1787 #ifdef TCP_OFFLOAD 1788 if (tp->t_flags & TF_TOE) { 1789 tcp_offload_ctloutput(tp, sopt->sopt_dir, 1790 sopt->sopt_name); 1791 } 1792 #endif 1793 err_out: 1794 INP_WUNLOCK(inp); 1795 return (error); 1796 1797 } 1798 1799 /* Pass in the INP locked, callee must unlock it. */ 1800 return (tp->t_fb->tfb_tcp_ctloutput(tp, sopt)); 1801 } 1802 1803 static int 1804 tcp_ctloutput_get(struct inpcb *inp, struct sockopt *sopt) 1805 { 1806 struct socket *so = inp->inp_socket; 1807 struct tcpcb *tp = intotcpcb(inp); 1808 int error = 0; 1809 1810 MPASS(sopt->sopt_dir == SOPT_GET); 1811 INP_WLOCK_ASSERT(inp); 1812 KASSERT((inp->inp_flags & INP_DROPPED) == 0, 1813 ("inp_flags == %x", inp->inp_flags)); 1814 KASSERT(so != NULL, ("inp_socket == NULL")); 1815 1816 if (sopt->sopt_level != IPPROTO_TCP) { 1817 INP_WUNLOCK(inp); 1818 #ifdef INET6 1819 if (inp->inp_vflag & INP_IPV6PROTO) 1820 error = ip6_ctloutput(so, sopt); 1821 #endif /* INET6 */ 1822 #if defined(INET6) && defined(INET) 1823 else 1824 #endif 1825 #ifdef INET 1826 error = ip_ctloutput(so, sopt); 1827 #endif 1828 return (error); 1829 } 1830 if (((sopt->sopt_name == TCP_FUNCTION_BLK) || 1831 (sopt->sopt_name == TCP_FUNCTION_ALIAS))) { 1832 struct tcp_function_set fsn; 1833 1834 if (sopt->sopt_name == TCP_FUNCTION_ALIAS) { 1835 memset(&fsn, 0, sizeof(fsn)); 1836 find_tcp_function_alias(tp->t_fb, &fsn); 1837 } else { 1838 strncpy(fsn.function_set_name, 1839 tp->t_fb->tfb_tcp_block_name, 1840 TCP_FUNCTION_NAME_LEN_MAX); 1841 fsn.function_set_name[TCP_FUNCTION_NAME_LEN_MAX - 1] = '\0'; 1842 } 1843 fsn.pcbcnt = tp->t_fb->tfb_refcnt; 1844 INP_WUNLOCK(inp); 1845 error = sooptcopyout(sopt, &fsn, sizeof fsn); 1846 return (error); 1847 } 1848 1849 /* Pass in the INP locked, callee must unlock it. */ 1850 return (tp->t_fb->tfb_tcp_ctloutput(tp, sopt)); 1851 } 1852 1853 int 1854 tcp_ctloutput(struct socket *so, struct sockopt *sopt) 1855 { 1856 struct inpcb *inp; 1857 1858 inp = sotoinpcb(so); 1859 KASSERT(inp != NULL, ("tcp_ctloutput: inp == NULL")); 1860 1861 INP_WLOCK(inp); 1862 if (inp->inp_flags & INP_DROPPED) { 1863 INP_WUNLOCK(inp); 1864 return (ECONNRESET); 1865 } 1866 if (sopt->sopt_dir == SOPT_SET) 1867 return (tcp_ctloutput_set(inp, sopt)); 1868 else if (sopt->sopt_dir == SOPT_GET) 1869 return (tcp_ctloutput_get(inp, sopt)); 1870 else 1871 panic("%s: sopt_dir $%d", __func__, sopt->sopt_dir); 1872 } 1873 1874 /* 1875 * If this assert becomes untrue, we need to change the size of the buf 1876 * variable in tcp_default_ctloutput(). 1877 */ 1878 #ifdef CTASSERT 1879 CTASSERT(TCP_CA_NAME_MAX <= TCP_LOG_ID_LEN); 1880 CTASSERT(TCP_LOG_REASON_LEN <= TCP_LOG_ID_LEN); 1881 #endif 1882 1883 #ifdef KERN_TLS 1884 static int 1885 copyin_tls_enable(struct sockopt *sopt, struct tls_enable *tls) 1886 { 1887 struct tls_enable_v0 tls_v0; 1888 int error; 1889 1890 if (sopt->sopt_valsize == sizeof(tls_v0)) { 1891 error = sooptcopyin(sopt, &tls_v0, sizeof(tls_v0), 1892 sizeof(tls_v0)); 1893 if (error) 1894 return (error); 1895 memset(tls, 0, sizeof(*tls)); 1896 tls->cipher_key = tls_v0.cipher_key; 1897 tls->iv = tls_v0.iv; 1898 tls->auth_key = tls_v0.auth_key; 1899 tls->cipher_algorithm = tls_v0.cipher_algorithm; 1900 tls->cipher_key_len = tls_v0.cipher_key_len; 1901 tls->iv_len = tls_v0.iv_len; 1902 tls->auth_algorithm = tls_v0.auth_algorithm; 1903 tls->auth_key_len = tls_v0.auth_key_len; 1904 tls->flags = tls_v0.flags; 1905 tls->tls_vmajor = tls_v0.tls_vmajor; 1906 tls->tls_vminor = tls_v0.tls_vminor; 1907 return (0); 1908 } 1909 1910 return (sooptcopyin(sopt, tls, sizeof(*tls), sizeof(*tls))); 1911 } 1912 #endif 1913 1914 extern struct cc_algo newreno_cc_algo; 1915 1916 static int 1917 tcp_set_cc_mod(struct inpcb *inp, struct sockopt *sopt) 1918 { 1919 struct cc_algo *algo; 1920 void *ptr = NULL; 1921 struct tcpcb *tp; 1922 struct cc_var cc_mem; 1923 char buf[TCP_CA_NAME_MAX]; 1924 size_t mem_sz; 1925 int error; 1926 1927 INP_WUNLOCK(inp); 1928 error = sooptcopyin(sopt, buf, TCP_CA_NAME_MAX - 1, 1); 1929 if (error) 1930 return(error); 1931 buf[sopt->sopt_valsize] = '\0'; 1932 CC_LIST_RLOCK(); 1933 STAILQ_FOREACH(algo, &cc_list, entries) { 1934 if (strncmp(buf, algo->name, 1935 TCP_CA_NAME_MAX) == 0) { 1936 if (algo->flags & CC_MODULE_BEING_REMOVED) { 1937 /* We can't "see" modules being unloaded */ 1938 continue; 1939 } 1940 break; 1941 } 1942 } 1943 if (algo == NULL) { 1944 CC_LIST_RUNLOCK(); 1945 return(ESRCH); 1946 } 1947 /* 1948 * With a reference the algorithm cannot be removed 1949 * so we hold a reference through the change process. 1950 */ 1951 cc_refer(algo); 1952 CC_LIST_RUNLOCK(); 1953 if (algo->cb_init != NULL) { 1954 /* We can now pre-get the memory for the CC */ 1955 mem_sz = (*algo->cc_data_sz)(); 1956 if (mem_sz == 0) { 1957 goto no_mem_needed; 1958 } 1959 ptr = malloc(mem_sz, M_CC_MEM, M_WAITOK); 1960 } else { 1961 no_mem_needed: 1962 mem_sz = 0; 1963 ptr = NULL; 1964 } 1965 /* 1966 * Make sure its all clean and zero and also get 1967 * back the inplock. 1968 */ 1969 memset(&cc_mem, 0, sizeof(cc_mem)); 1970 INP_WLOCK(inp); 1971 if (inp->inp_flags & INP_DROPPED) { 1972 INP_WUNLOCK(inp); 1973 if (ptr) 1974 free(ptr, M_CC_MEM); 1975 /* Release our temp reference */ 1976 CC_LIST_RLOCK(); 1977 cc_release(algo); 1978 CC_LIST_RUNLOCK(); 1979 return (ECONNRESET); 1980 } 1981 tp = intotcpcb(inp); 1982 if (ptr != NULL) 1983 memset(ptr, 0, mem_sz); 1984 cc_mem.ccvc.tcp = tp; 1985 /* 1986 * We once again hold a write lock over the tcb so it's 1987 * safe to do these things without ordering concerns. 1988 * Note here we init into stack memory. 1989 */ 1990 if (algo->cb_init != NULL) 1991 error = algo->cb_init(&cc_mem, ptr); 1992 else 1993 error = 0; 1994 /* 1995 * The CC algorithms, when given their memory 1996 * should not fail we could in theory have a 1997 * KASSERT here. 1998 */ 1999 if (error == 0) { 2000 /* 2001 * Touchdown, lets go ahead and move the 2002 * connection to the new CC module by 2003 * copying in the cc_mem after we call 2004 * the old ones cleanup (if any). 2005 */ 2006 if (CC_ALGO(tp)->cb_destroy != NULL) 2007 CC_ALGO(tp)->cb_destroy(&tp->t_ccv); 2008 /* Detach the old CC from the tcpcb */ 2009 cc_detach(tp); 2010 /* Copy in our temp memory that was inited */ 2011 memcpy(&tp->t_ccv, &cc_mem, sizeof(struct cc_var)); 2012 /* Now attach the new, which takes a reference */ 2013 cc_attach(tp, algo); 2014 /* Ok now are we where we have gotten past any conn_init? */ 2015 if (TCPS_HAVEESTABLISHED(tp->t_state) && (CC_ALGO(tp)->conn_init != NULL)) { 2016 /* Yep run the connection init for the new CC */ 2017 CC_ALGO(tp)->conn_init(&tp->t_ccv); 2018 } 2019 } else if (ptr) 2020 free(ptr, M_CC_MEM); 2021 INP_WUNLOCK(inp); 2022 /* Now lets release our temp reference */ 2023 CC_LIST_RLOCK(); 2024 cc_release(algo); 2025 CC_LIST_RUNLOCK(); 2026 return (error); 2027 } 2028 2029 int 2030 tcp_default_ctloutput(struct tcpcb *tp, struct sockopt *sopt) 2031 { 2032 struct inpcb *inp = tptoinpcb(tp); 2033 int error, opt, optval; 2034 u_int ui; 2035 struct tcp_info ti; 2036 #ifdef KERN_TLS 2037 struct tls_enable tls; 2038 struct socket *so = inp->inp_socket; 2039 #endif 2040 char *pbuf, buf[TCP_LOG_ID_LEN]; 2041 #ifdef STATS 2042 struct statsblob *sbp; 2043 #endif 2044 size_t len; 2045 2046 INP_WLOCK_ASSERT(inp); 2047 KASSERT((inp->inp_flags & INP_DROPPED) == 0, 2048 ("inp_flags == %x", inp->inp_flags)); 2049 KASSERT(inp->inp_socket != NULL, ("inp_socket == NULL")); 2050 2051 switch (sopt->sopt_level) { 2052 #ifdef INET6 2053 case IPPROTO_IPV6: 2054 MPASS(inp->inp_vflag & INP_IPV6PROTO); 2055 switch (sopt->sopt_name) { 2056 case IPV6_USE_MIN_MTU: 2057 tcp6_use_min_mtu(tp); 2058 /* FALLTHROUGH */ 2059 } 2060 INP_WUNLOCK(inp); 2061 return (0); 2062 #endif 2063 #ifdef INET 2064 case IPPROTO_IP: 2065 INP_WUNLOCK(inp); 2066 return (0); 2067 #endif 2068 } 2069 2070 /* 2071 * For TCP_CCALGOOPT forward the control to CC module, for both 2072 * SOPT_SET and SOPT_GET. 2073 */ 2074 switch (sopt->sopt_name) { 2075 case TCP_CCALGOOPT: 2076 INP_WUNLOCK(inp); 2077 if (sopt->sopt_valsize > CC_ALGOOPT_LIMIT) 2078 return (EINVAL); 2079 pbuf = malloc(sopt->sopt_valsize, M_TEMP, M_WAITOK | M_ZERO); 2080 error = sooptcopyin(sopt, pbuf, sopt->sopt_valsize, 2081 sopt->sopt_valsize); 2082 if (error) { 2083 free(pbuf, M_TEMP); 2084 return (error); 2085 } 2086 INP_WLOCK_RECHECK_CLEANUP(inp, free(pbuf, M_TEMP)); 2087 if (CC_ALGO(tp)->ctl_output != NULL) 2088 error = CC_ALGO(tp)->ctl_output(&tp->t_ccv, sopt, pbuf); 2089 else 2090 error = ENOENT; 2091 INP_WUNLOCK(inp); 2092 if (error == 0 && sopt->sopt_dir == SOPT_GET) 2093 error = sooptcopyout(sopt, pbuf, sopt->sopt_valsize); 2094 free(pbuf, M_TEMP); 2095 return (error); 2096 } 2097 2098 switch (sopt->sopt_dir) { 2099 case SOPT_SET: 2100 switch (sopt->sopt_name) { 2101 #if defined(IPSEC_SUPPORT) || defined(TCP_SIGNATURE) 2102 case TCP_MD5SIG: 2103 INP_WUNLOCK(inp); 2104 if (!TCPMD5_ENABLED()) 2105 return (ENOPROTOOPT); 2106 error = TCPMD5_PCBCTL(inp, sopt); 2107 if (error) 2108 return (error); 2109 INP_WLOCK_RECHECK(inp); 2110 goto unlock_and_done; 2111 #endif /* IPSEC */ 2112 2113 case TCP_NODELAY: 2114 case TCP_NOOPT: 2115 case TCP_LRD: 2116 INP_WUNLOCK(inp); 2117 error = sooptcopyin(sopt, &optval, sizeof optval, 2118 sizeof optval); 2119 if (error) 2120 return (error); 2121 2122 INP_WLOCK_RECHECK(inp); 2123 switch (sopt->sopt_name) { 2124 case TCP_NODELAY: 2125 opt = TF_NODELAY; 2126 break; 2127 case TCP_NOOPT: 2128 opt = TF_NOOPT; 2129 break; 2130 case TCP_LRD: 2131 opt = TF_LRD; 2132 break; 2133 default: 2134 opt = 0; /* dead code to fool gcc */ 2135 break; 2136 } 2137 2138 if (optval) 2139 tp->t_flags |= opt; 2140 else 2141 tp->t_flags &= ~opt; 2142 unlock_and_done: 2143 #ifdef TCP_OFFLOAD 2144 if (tp->t_flags & TF_TOE) { 2145 tcp_offload_ctloutput(tp, sopt->sopt_dir, 2146 sopt->sopt_name); 2147 } 2148 #endif 2149 INP_WUNLOCK(inp); 2150 break; 2151 2152 case TCP_NOPUSH: 2153 INP_WUNLOCK(inp); 2154 error = sooptcopyin(sopt, &optval, sizeof optval, 2155 sizeof optval); 2156 if (error) 2157 return (error); 2158 2159 INP_WLOCK_RECHECK(inp); 2160 if (optval) 2161 tp->t_flags |= TF_NOPUSH; 2162 else if (tp->t_flags & TF_NOPUSH) { 2163 tp->t_flags &= ~TF_NOPUSH; 2164 if (TCPS_HAVEESTABLISHED(tp->t_state)) { 2165 struct epoch_tracker et; 2166 2167 NET_EPOCH_ENTER(et); 2168 error = tcp_output_nodrop(tp); 2169 NET_EPOCH_EXIT(et); 2170 } 2171 } 2172 goto unlock_and_done; 2173 2174 case TCP_REMOTE_UDP_ENCAPS_PORT: 2175 INP_WUNLOCK(inp); 2176 error = sooptcopyin(sopt, &optval, sizeof optval, 2177 sizeof optval); 2178 if (error) 2179 return (error); 2180 if ((optval < TCP_TUNNELING_PORT_MIN) || 2181 (optval > TCP_TUNNELING_PORT_MAX)) { 2182 /* Its got to be in range */ 2183 return (EINVAL); 2184 } 2185 if ((V_tcp_udp_tunneling_port == 0) && (optval != 0)) { 2186 /* You have to have enabled a UDP tunneling port first */ 2187 return (EINVAL); 2188 } 2189 INP_WLOCK_RECHECK(inp); 2190 if (tp->t_state != TCPS_CLOSED) { 2191 /* You can't change after you are connected */ 2192 error = EINVAL; 2193 } else { 2194 /* Ok we are all good set the port */ 2195 tp->t_port = htons(optval); 2196 } 2197 goto unlock_and_done; 2198 2199 case TCP_MAXSEG: 2200 INP_WUNLOCK(inp); 2201 error = sooptcopyin(sopt, &optval, sizeof optval, 2202 sizeof optval); 2203 if (error) 2204 return (error); 2205 2206 INP_WLOCK_RECHECK(inp); 2207 if (optval > 0 && optval <= tp->t_maxseg && 2208 optval + 40 >= V_tcp_minmss) 2209 tp->t_maxseg = optval; 2210 else 2211 error = EINVAL; 2212 goto unlock_and_done; 2213 2214 case TCP_INFO: 2215 INP_WUNLOCK(inp); 2216 error = EINVAL; 2217 break; 2218 2219 case TCP_STATS: 2220 INP_WUNLOCK(inp); 2221 #ifdef STATS 2222 error = sooptcopyin(sopt, &optval, sizeof optval, 2223 sizeof optval); 2224 if (error) 2225 return (error); 2226 2227 if (optval > 0) 2228 sbp = stats_blob_alloc( 2229 V_tcp_perconn_stats_dflt_tpl, 0); 2230 else 2231 sbp = NULL; 2232 2233 INP_WLOCK_RECHECK(inp); 2234 if ((tp->t_stats != NULL && sbp == NULL) || 2235 (tp->t_stats == NULL && sbp != NULL)) { 2236 struct statsblob *t = tp->t_stats; 2237 tp->t_stats = sbp; 2238 sbp = t; 2239 } 2240 INP_WUNLOCK(inp); 2241 2242 stats_blob_destroy(sbp); 2243 #else 2244 return (EOPNOTSUPP); 2245 #endif /* !STATS */ 2246 break; 2247 2248 case TCP_CONGESTION: 2249 error = tcp_set_cc_mod(inp, sopt); 2250 break; 2251 2252 case TCP_REUSPORT_LB_NUMA: 2253 INP_WUNLOCK(inp); 2254 error = sooptcopyin(sopt, &optval, sizeof(optval), 2255 sizeof(optval)); 2256 INP_WLOCK_RECHECK(inp); 2257 if (!error) 2258 error = in_pcblbgroup_numa(inp, optval); 2259 INP_WUNLOCK(inp); 2260 break; 2261 2262 #ifdef KERN_TLS 2263 case TCP_TXTLS_ENABLE: 2264 INP_WUNLOCK(inp); 2265 error = copyin_tls_enable(sopt, &tls); 2266 if (error) 2267 break; 2268 error = ktls_enable_tx(so, &tls); 2269 break; 2270 case TCP_TXTLS_MODE: 2271 INP_WUNLOCK(inp); 2272 error = sooptcopyin(sopt, &ui, sizeof(ui), sizeof(ui)); 2273 if (error) 2274 return (error); 2275 2276 INP_WLOCK_RECHECK(inp); 2277 error = ktls_set_tx_mode(so, ui); 2278 INP_WUNLOCK(inp); 2279 break; 2280 case TCP_RXTLS_ENABLE: 2281 INP_WUNLOCK(inp); 2282 error = sooptcopyin(sopt, &tls, sizeof(tls), 2283 sizeof(tls)); 2284 if (error) 2285 break; 2286 error = ktls_enable_rx(so, &tls); 2287 break; 2288 #endif 2289 case TCP_MAXUNACKTIME: 2290 case TCP_KEEPIDLE: 2291 case TCP_KEEPINTVL: 2292 case TCP_KEEPINIT: 2293 INP_WUNLOCK(inp); 2294 error = sooptcopyin(sopt, &ui, sizeof(ui), sizeof(ui)); 2295 if (error) 2296 return (error); 2297 2298 if (ui > (UINT_MAX / hz)) { 2299 error = EINVAL; 2300 break; 2301 } 2302 ui *= hz; 2303 2304 INP_WLOCK_RECHECK(inp); 2305 switch (sopt->sopt_name) { 2306 case TCP_MAXUNACKTIME: 2307 tp->t_maxunacktime = ui; 2308 break; 2309 2310 case TCP_KEEPIDLE: 2311 tp->t_keepidle = ui; 2312 /* 2313 * XXX: better check current remaining 2314 * timeout and "merge" it with new value. 2315 */ 2316 if ((tp->t_state > TCPS_LISTEN) && 2317 (tp->t_state <= TCPS_CLOSING)) 2318 tcp_timer_activate(tp, TT_KEEP, 2319 TP_KEEPIDLE(tp)); 2320 break; 2321 case TCP_KEEPINTVL: 2322 tp->t_keepintvl = ui; 2323 if ((tp->t_state == TCPS_FIN_WAIT_2) && 2324 (TP_MAXIDLE(tp) > 0)) 2325 tcp_timer_activate(tp, TT_2MSL, 2326 TP_MAXIDLE(tp)); 2327 break; 2328 case TCP_KEEPINIT: 2329 tp->t_keepinit = ui; 2330 if (tp->t_state == TCPS_SYN_RECEIVED || 2331 tp->t_state == TCPS_SYN_SENT) 2332 tcp_timer_activate(tp, TT_KEEP, 2333 TP_KEEPINIT(tp)); 2334 break; 2335 } 2336 goto unlock_and_done; 2337 2338 case TCP_KEEPCNT: 2339 INP_WUNLOCK(inp); 2340 error = sooptcopyin(sopt, &ui, sizeof(ui), sizeof(ui)); 2341 if (error) 2342 return (error); 2343 2344 INP_WLOCK_RECHECK(inp); 2345 tp->t_keepcnt = ui; 2346 if ((tp->t_state == TCPS_FIN_WAIT_2) && 2347 (TP_MAXIDLE(tp) > 0)) 2348 tcp_timer_activate(tp, TT_2MSL, 2349 TP_MAXIDLE(tp)); 2350 goto unlock_and_done; 2351 2352 #ifdef TCPPCAP 2353 case TCP_PCAP_OUT: 2354 case TCP_PCAP_IN: 2355 INP_WUNLOCK(inp); 2356 error = sooptcopyin(sopt, &optval, sizeof optval, 2357 sizeof optval); 2358 if (error) 2359 return (error); 2360 2361 INP_WLOCK_RECHECK(inp); 2362 if (optval >= 0) 2363 tcp_pcap_set_sock_max( 2364 (sopt->sopt_name == TCP_PCAP_OUT) ? 2365 &(tp->t_outpkts) : &(tp->t_inpkts), 2366 optval); 2367 else 2368 error = EINVAL; 2369 goto unlock_and_done; 2370 #endif 2371 2372 case TCP_FASTOPEN: { 2373 struct tcp_fastopen tfo_optval; 2374 2375 INP_WUNLOCK(inp); 2376 if (!V_tcp_fastopen_client_enable && 2377 !V_tcp_fastopen_server_enable) 2378 return (EPERM); 2379 2380 error = sooptcopyin(sopt, &tfo_optval, 2381 sizeof(tfo_optval), sizeof(int)); 2382 if (error) 2383 return (error); 2384 2385 INP_WLOCK_RECHECK(inp); 2386 if ((tp->t_state != TCPS_CLOSED) && 2387 (tp->t_state != TCPS_LISTEN)) { 2388 error = EINVAL; 2389 goto unlock_and_done; 2390 } 2391 if (tfo_optval.enable) { 2392 if (tp->t_state == TCPS_LISTEN) { 2393 if (!V_tcp_fastopen_server_enable) { 2394 error = EPERM; 2395 goto unlock_and_done; 2396 } 2397 2398 if (tp->t_tfo_pending == NULL) 2399 tp->t_tfo_pending = 2400 tcp_fastopen_alloc_counter(); 2401 } else { 2402 /* 2403 * If a pre-shared key was provided, 2404 * stash it in the client cookie 2405 * field of the tcpcb for use during 2406 * connect. 2407 */ 2408 if (sopt->sopt_valsize == 2409 sizeof(tfo_optval)) { 2410 memcpy(tp->t_tfo_cookie.client, 2411 tfo_optval.psk, 2412 TCP_FASTOPEN_PSK_LEN); 2413 tp->t_tfo_client_cookie_len = 2414 TCP_FASTOPEN_PSK_LEN; 2415 } 2416 } 2417 tp->t_flags |= TF_FASTOPEN; 2418 } else 2419 tp->t_flags &= ~TF_FASTOPEN; 2420 goto unlock_and_done; 2421 } 2422 2423 #ifdef TCP_BLACKBOX 2424 case TCP_LOG: 2425 INP_WUNLOCK(inp); 2426 error = sooptcopyin(sopt, &optval, sizeof optval, 2427 sizeof optval); 2428 if (error) 2429 return (error); 2430 2431 INP_WLOCK_RECHECK(inp); 2432 error = tcp_log_state_change(tp, optval); 2433 goto unlock_and_done; 2434 2435 case TCP_LOGBUF: 2436 INP_WUNLOCK(inp); 2437 error = EINVAL; 2438 break; 2439 2440 case TCP_LOGID: 2441 INP_WUNLOCK(inp); 2442 error = sooptcopyin(sopt, buf, TCP_LOG_ID_LEN - 1, 0); 2443 if (error) 2444 break; 2445 buf[sopt->sopt_valsize] = '\0'; 2446 INP_WLOCK_RECHECK(inp); 2447 error = tcp_log_set_id(tp, buf); 2448 /* tcp_log_set_id() unlocks the INP. */ 2449 break; 2450 2451 case TCP_LOGDUMP: 2452 case TCP_LOGDUMPID: 2453 INP_WUNLOCK(inp); 2454 error = 2455 sooptcopyin(sopt, buf, TCP_LOG_REASON_LEN - 1, 0); 2456 if (error) 2457 break; 2458 buf[sopt->sopt_valsize] = '\0'; 2459 INP_WLOCK_RECHECK(inp); 2460 if (sopt->sopt_name == TCP_LOGDUMP) { 2461 error = tcp_log_dump_tp_logbuf(tp, buf, 2462 M_WAITOK, true); 2463 INP_WUNLOCK(inp); 2464 } else { 2465 tcp_log_dump_tp_bucket_logbufs(tp, buf); 2466 /* 2467 * tcp_log_dump_tp_bucket_logbufs() drops the 2468 * INP lock. 2469 */ 2470 } 2471 break; 2472 #endif 2473 2474 default: 2475 INP_WUNLOCK(inp); 2476 error = ENOPROTOOPT; 2477 break; 2478 } 2479 break; 2480 2481 case SOPT_GET: 2482 tp = intotcpcb(inp); 2483 switch (sopt->sopt_name) { 2484 #if defined(IPSEC_SUPPORT) || defined(TCP_SIGNATURE) 2485 case TCP_MD5SIG: 2486 INP_WUNLOCK(inp); 2487 if (!TCPMD5_ENABLED()) 2488 return (ENOPROTOOPT); 2489 error = TCPMD5_PCBCTL(inp, sopt); 2490 break; 2491 #endif 2492 2493 case TCP_NODELAY: 2494 optval = tp->t_flags & TF_NODELAY; 2495 INP_WUNLOCK(inp); 2496 error = sooptcopyout(sopt, &optval, sizeof optval); 2497 break; 2498 case TCP_MAXSEG: 2499 optval = tp->t_maxseg; 2500 INP_WUNLOCK(inp); 2501 error = sooptcopyout(sopt, &optval, sizeof optval); 2502 break; 2503 case TCP_REMOTE_UDP_ENCAPS_PORT: 2504 optval = ntohs(tp->t_port); 2505 INP_WUNLOCK(inp); 2506 error = sooptcopyout(sopt, &optval, sizeof optval); 2507 break; 2508 case TCP_NOOPT: 2509 optval = tp->t_flags & TF_NOOPT; 2510 INP_WUNLOCK(inp); 2511 error = sooptcopyout(sopt, &optval, sizeof optval); 2512 break; 2513 case TCP_NOPUSH: 2514 optval = tp->t_flags & TF_NOPUSH; 2515 INP_WUNLOCK(inp); 2516 error = sooptcopyout(sopt, &optval, sizeof optval); 2517 break; 2518 case TCP_INFO: 2519 tcp_fill_info(tp, &ti); 2520 INP_WUNLOCK(inp); 2521 error = sooptcopyout(sopt, &ti, sizeof ti); 2522 break; 2523 case TCP_STATS: 2524 { 2525 #ifdef STATS 2526 int nheld; 2527 TYPEOF_MEMBER(struct statsblob, flags) sbflags = 0; 2528 2529 error = 0; 2530 socklen_t outsbsz = sopt->sopt_valsize; 2531 if (tp->t_stats == NULL) 2532 error = ENOENT; 2533 else if (outsbsz >= tp->t_stats->cursz) 2534 outsbsz = tp->t_stats->cursz; 2535 else if (outsbsz >= sizeof(struct statsblob)) 2536 outsbsz = sizeof(struct statsblob); 2537 else 2538 error = EINVAL; 2539 INP_WUNLOCK(inp); 2540 if (error) 2541 break; 2542 2543 sbp = sopt->sopt_val; 2544 nheld = atop(round_page(((vm_offset_t)sbp) + 2545 (vm_size_t)outsbsz) - trunc_page((vm_offset_t)sbp)); 2546 vm_page_t ma[nheld]; 2547 if (vm_fault_quick_hold_pages( 2548 &curproc->p_vmspace->vm_map, (vm_offset_t)sbp, 2549 outsbsz, VM_PROT_READ | VM_PROT_WRITE, ma, 2550 nheld) < 0) { 2551 error = EFAULT; 2552 break; 2553 } 2554 2555 if ((error = copyin_nofault(&(sbp->flags), &sbflags, 2556 SIZEOF_MEMBER(struct statsblob, flags)))) 2557 goto unhold; 2558 2559 INP_WLOCK_RECHECK(inp); 2560 error = stats_blob_snapshot(&sbp, outsbsz, tp->t_stats, 2561 sbflags | SB_CLONE_USRDSTNOFAULT); 2562 INP_WUNLOCK(inp); 2563 sopt->sopt_valsize = outsbsz; 2564 unhold: 2565 vm_page_unhold_pages(ma, nheld); 2566 #else 2567 INP_WUNLOCK(inp); 2568 error = EOPNOTSUPP; 2569 #endif /* !STATS */ 2570 break; 2571 } 2572 case TCP_CONGESTION: 2573 len = strlcpy(buf, CC_ALGO(tp)->name, TCP_CA_NAME_MAX); 2574 INP_WUNLOCK(inp); 2575 error = sooptcopyout(sopt, buf, len + 1); 2576 break; 2577 case TCP_MAXUNACKTIME: 2578 case TCP_KEEPIDLE: 2579 case TCP_KEEPINTVL: 2580 case TCP_KEEPINIT: 2581 case TCP_KEEPCNT: 2582 switch (sopt->sopt_name) { 2583 case TCP_MAXUNACKTIME: 2584 ui = TP_MAXUNACKTIME(tp) / hz; 2585 break; 2586 case TCP_KEEPIDLE: 2587 ui = TP_KEEPIDLE(tp) / hz; 2588 break; 2589 case TCP_KEEPINTVL: 2590 ui = TP_KEEPINTVL(tp) / hz; 2591 break; 2592 case TCP_KEEPINIT: 2593 ui = TP_KEEPINIT(tp) / hz; 2594 break; 2595 case TCP_KEEPCNT: 2596 ui = TP_KEEPCNT(tp); 2597 break; 2598 } 2599 INP_WUNLOCK(inp); 2600 error = sooptcopyout(sopt, &ui, sizeof(ui)); 2601 break; 2602 #ifdef TCPPCAP 2603 case TCP_PCAP_OUT: 2604 case TCP_PCAP_IN: 2605 optval = tcp_pcap_get_sock_max( 2606 (sopt->sopt_name == TCP_PCAP_OUT) ? 2607 &(tp->t_outpkts) : &(tp->t_inpkts)); 2608 INP_WUNLOCK(inp); 2609 error = sooptcopyout(sopt, &optval, sizeof optval); 2610 break; 2611 #endif 2612 case TCP_FASTOPEN: 2613 optval = tp->t_flags & TF_FASTOPEN; 2614 INP_WUNLOCK(inp); 2615 error = sooptcopyout(sopt, &optval, sizeof optval); 2616 break; 2617 #ifdef TCP_BLACKBOX 2618 case TCP_LOG: 2619 optval = tcp_get_bblog_state(tp); 2620 INP_WUNLOCK(inp); 2621 error = sooptcopyout(sopt, &optval, sizeof(optval)); 2622 break; 2623 case TCP_LOGBUF: 2624 /* tcp_log_getlogbuf() does INP_WUNLOCK(inp) */ 2625 error = tcp_log_getlogbuf(sopt, tp); 2626 break; 2627 case TCP_LOGID: 2628 len = tcp_log_get_id(tp, buf); 2629 INP_WUNLOCK(inp); 2630 error = sooptcopyout(sopt, buf, len + 1); 2631 break; 2632 case TCP_LOGDUMP: 2633 case TCP_LOGDUMPID: 2634 INP_WUNLOCK(inp); 2635 error = EINVAL; 2636 break; 2637 #endif 2638 #ifdef KERN_TLS 2639 case TCP_TXTLS_MODE: 2640 error = ktls_get_tx_mode(so, &optval); 2641 INP_WUNLOCK(inp); 2642 if (error == 0) 2643 error = sooptcopyout(sopt, &optval, 2644 sizeof(optval)); 2645 break; 2646 case TCP_RXTLS_MODE: 2647 error = ktls_get_rx_mode(so, &optval); 2648 INP_WUNLOCK(inp); 2649 if (error == 0) 2650 error = sooptcopyout(sopt, &optval, 2651 sizeof(optval)); 2652 break; 2653 #endif 2654 case TCP_LRD: 2655 optval = tp->t_flags & TF_LRD; 2656 INP_WUNLOCK(inp); 2657 error = sooptcopyout(sopt, &optval, sizeof optval); 2658 break; 2659 default: 2660 INP_WUNLOCK(inp); 2661 error = ENOPROTOOPT; 2662 break; 2663 } 2664 break; 2665 } 2666 return (error); 2667 } 2668 #undef INP_WLOCK_RECHECK 2669 #undef INP_WLOCK_RECHECK_CLEANUP 2670 2671 /* 2672 * Initiate (or continue) disconnect. 2673 * If embryonic state, just send reset (once). 2674 * If in ``let data drain'' option and linger null, just drop. 2675 * Otherwise (hard), mark socket disconnecting and drop 2676 * current input data; switch states based on user close, and 2677 * send segment to peer (with FIN). 2678 */ 2679 static void 2680 tcp_disconnect(struct tcpcb *tp) 2681 { 2682 struct inpcb *inp = tptoinpcb(tp); 2683 struct socket *so = tptosocket(tp); 2684 2685 NET_EPOCH_ASSERT(); 2686 INP_WLOCK_ASSERT(inp); 2687 2688 /* 2689 * Neither tcp_close() nor tcp_drop() should return NULL, as the 2690 * socket is still open. 2691 */ 2692 if (tp->t_state < TCPS_ESTABLISHED && 2693 !(tp->t_state > TCPS_LISTEN && IS_FASTOPEN(tp->t_flags))) { 2694 tp = tcp_close(tp); 2695 KASSERT(tp != NULL, 2696 ("tcp_disconnect: tcp_close() returned NULL")); 2697 } else if ((so->so_options & SO_LINGER) && so->so_linger == 0) { 2698 tp = tcp_drop(tp, 0); 2699 KASSERT(tp != NULL, 2700 ("tcp_disconnect: tcp_drop() returned NULL")); 2701 } else { 2702 soisdisconnecting(so); 2703 sbflush(&so->so_rcv); 2704 tcp_usrclosed(tp); 2705 if (!(inp->inp_flags & INP_DROPPED)) 2706 /* Ignore stack's drop request, we already at it. */ 2707 (void)tcp_output_nodrop(tp); 2708 } 2709 } 2710 2711 /* 2712 * User issued close, and wish to trail through shutdown states: 2713 * if never received SYN, just forget it. If got a SYN from peer, 2714 * but haven't sent FIN, then go to FIN_WAIT_1 state to send peer a FIN. 2715 * If already got a FIN from peer, then almost done; go to LAST_ACK 2716 * state. In all other cases, have already sent FIN to peer (e.g. 2717 * after PRU_SHUTDOWN), and just have to play tedious game waiting 2718 * for peer to send FIN or not respond to keep-alives, etc. 2719 * We can let the user exit from the close as soon as the FIN is acked. 2720 */ 2721 static void 2722 tcp_usrclosed(struct tcpcb *tp) 2723 { 2724 2725 NET_EPOCH_ASSERT(); 2726 INP_WLOCK_ASSERT(tptoinpcb(tp)); 2727 2728 switch (tp->t_state) { 2729 case TCPS_LISTEN: 2730 #ifdef TCP_OFFLOAD 2731 tcp_offload_listen_stop(tp); 2732 #endif 2733 tcp_state_change(tp, TCPS_CLOSED); 2734 /* FALLTHROUGH */ 2735 case TCPS_CLOSED: 2736 tp = tcp_close(tp); 2737 /* 2738 * tcp_close() should never return NULL here as the socket is 2739 * still open. 2740 */ 2741 KASSERT(tp != NULL, 2742 ("tcp_usrclosed: tcp_close() returned NULL")); 2743 break; 2744 2745 case TCPS_SYN_SENT: 2746 case TCPS_SYN_RECEIVED: 2747 tp->t_flags |= TF_NEEDFIN; 2748 break; 2749 2750 case TCPS_ESTABLISHED: 2751 tcp_state_change(tp, TCPS_FIN_WAIT_1); 2752 break; 2753 2754 case TCPS_CLOSE_WAIT: 2755 tcp_state_change(tp, TCPS_LAST_ACK); 2756 break; 2757 } 2758 if (tp->t_acktime == 0) 2759 tp->t_acktime = ticks; 2760 if (tp->t_state >= TCPS_FIN_WAIT_2) { 2761 soisdisconnected(tptosocket(tp)); 2762 /* Prevent the connection hanging in FIN_WAIT_2 forever. */ 2763 if (tp->t_state == TCPS_FIN_WAIT_2) { 2764 int timeout; 2765 2766 timeout = (tcp_fast_finwait2_recycle) ? 2767 tcp_finwait2_timeout : TP_MAXIDLE(tp); 2768 tcp_timer_activate(tp, TT_2MSL, timeout); 2769 } 2770 } 2771 } 2772 2773 #ifdef DDB 2774 static void 2775 db_print_indent(int indent) 2776 { 2777 int i; 2778 2779 for (i = 0; i < indent; i++) 2780 db_printf(" "); 2781 } 2782 2783 static void 2784 db_print_tstate(int t_state) 2785 { 2786 2787 switch (t_state) { 2788 case TCPS_CLOSED: 2789 db_printf("TCPS_CLOSED"); 2790 return; 2791 2792 case TCPS_LISTEN: 2793 db_printf("TCPS_LISTEN"); 2794 return; 2795 2796 case TCPS_SYN_SENT: 2797 db_printf("TCPS_SYN_SENT"); 2798 return; 2799 2800 case TCPS_SYN_RECEIVED: 2801 db_printf("TCPS_SYN_RECEIVED"); 2802 return; 2803 2804 case TCPS_ESTABLISHED: 2805 db_printf("TCPS_ESTABLISHED"); 2806 return; 2807 2808 case TCPS_CLOSE_WAIT: 2809 db_printf("TCPS_CLOSE_WAIT"); 2810 return; 2811 2812 case TCPS_FIN_WAIT_1: 2813 db_printf("TCPS_FIN_WAIT_1"); 2814 return; 2815 2816 case TCPS_CLOSING: 2817 db_printf("TCPS_CLOSING"); 2818 return; 2819 2820 case TCPS_LAST_ACK: 2821 db_printf("TCPS_LAST_ACK"); 2822 return; 2823 2824 case TCPS_FIN_WAIT_2: 2825 db_printf("TCPS_FIN_WAIT_2"); 2826 return; 2827 2828 case TCPS_TIME_WAIT: 2829 db_printf("TCPS_TIME_WAIT"); 2830 return; 2831 2832 default: 2833 db_printf("unknown"); 2834 return; 2835 } 2836 } 2837 2838 static void 2839 db_print_tflags(u_int t_flags) 2840 { 2841 int comma; 2842 2843 comma = 0; 2844 if (t_flags & TF_ACKNOW) { 2845 db_printf("%sTF_ACKNOW", comma ? ", " : ""); 2846 comma = 1; 2847 } 2848 if (t_flags & TF_DELACK) { 2849 db_printf("%sTF_DELACK", comma ? ", " : ""); 2850 comma = 1; 2851 } 2852 if (t_flags & TF_NODELAY) { 2853 db_printf("%sTF_NODELAY", comma ? ", " : ""); 2854 comma = 1; 2855 } 2856 if (t_flags & TF_NOOPT) { 2857 db_printf("%sTF_NOOPT", comma ? ", " : ""); 2858 comma = 1; 2859 } 2860 if (t_flags & TF_SENTFIN) { 2861 db_printf("%sTF_SENTFIN", comma ? ", " : ""); 2862 comma = 1; 2863 } 2864 if (t_flags & TF_REQ_SCALE) { 2865 db_printf("%sTF_REQ_SCALE", comma ? ", " : ""); 2866 comma = 1; 2867 } 2868 if (t_flags & TF_RCVD_SCALE) { 2869 db_printf("%sTF_RECVD_SCALE", comma ? ", " : ""); 2870 comma = 1; 2871 } 2872 if (t_flags & TF_REQ_TSTMP) { 2873 db_printf("%sTF_REQ_TSTMP", comma ? ", " : ""); 2874 comma = 1; 2875 } 2876 if (t_flags & TF_RCVD_TSTMP) { 2877 db_printf("%sTF_RCVD_TSTMP", comma ? ", " : ""); 2878 comma = 1; 2879 } 2880 if (t_flags & TF_SACK_PERMIT) { 2881 db_printf("%sTF_SACK_PERMIT", comma ? ", " : ""); 2882 comma = 1; 2883 } 2884 if (t_flags & TF_NEEDSYN) { 2885 db_printf("%sTF_NEEDSYN", comma ? ", " : ""); 2886 comma = 1; 2887 } 2888 if (t_flags & TF_NEEDFIN) { 2889 db_printf("%sTF_NEEDFIN", comma ? ", " : ""); 2890 comma = 1; 2891 } 2892 if (t_flags & TF_NOPUSH) { 2893 db_printf("%sTF_NOPUSH", comma ? ", " : ""); 2894 comma = 1; 2895 } 2896 if (t_flags & TF_PREVVALID) { 2897 db_printf("%sTF_PREVVALID", comma ? ", " : ""); 2898 comma = 1; 2899 } 2900 if (t_flags & TF_WAKESOR) { 2901 db_printf("%sTF_WAKESOR", comma ? ", " : ""); 2902 comma = 1; 2903 } 2904 if (t_flags & TF_GPUTINPROG) { 2905 db_printf("%sTF_GPUTINPROG", comma ? ", " : ""); 2906 comma = 1; 2907 } 2908 if (t_flags & TF_MORETOCOME) { 2909 db_printf("%sTF_MORETOCOME", comma ? ", " : ""); 2910 comma = 1; 2911 } 2912 if (t_flags & TF_SONOTCONN) { 2913 db_printf("%sTF_SONOTCONN", comma ? ", " : ""); 2914 comma = 1; 2915 } 2916 if (t_flags & TF_LASTIDLE) { 2917 db_printf("%sTF_LASTIDLE", comma ? ", " : ""); 2918 comma = 1; 2919 } 2920 if (t_flags & TF_RXWIN0SENT) { 2921 db_printf("%sTF_RXWIN0SENT", comma ? ", " : ""); 2922 comma = 1; 2923 } 2924 if (t_flags & TF_FASTRECOVERY) { 2925 db_printf("%sTF_FASTRECOVERY", comma ? ", " : ""); 2926 comma = 1; 2927 } 2928 if (t_flags & TF_WASFRECOVERY) { 2929 db_printf("%sTF_WASFRECOVERY", comma ? ", " : ""); 2930 comma = 1; 2931 } 2932 if (t_flags & TF_SIGNATURE) { 2933 db_printf("%sTF_SIGNATURE", comma ? ", " : ""); 2934 comma = 1; 2935 } 2936 if (t_flags & TF_FORCEDATA) { 2937 db_printf("%sTF_FORCEDATA", comma ? ", " : ""); 2938 comma = 1; 2939 } 2940 if (t_flags & TF_TSO) { 2941 db_printf("%sTF_TSO", comma ? ", " : ""); 2942 comma = 1; 2943 } 2944 if (t_flags & TF_TOE) { 2945 db_printf("%sTF_TOE", comma ? ", " : ""); 2946 comma = 1; 2947 } 2948 if (t_flags & TF_CLOSED) { 2949 db_printf("%sTF_CLOSED", comma ? ", " : ""); 2950 comma = 1; 2951 } 2952 if (t_flags & TF_UNUSED1) { 2953 db_printf("%sTF_UNUSED1", comma ? ", " : ""); 2954 comma = 1; 2955 } 2956 if (t_flags & TF_LRD) { 2957 db_printf("%sTF_LRD", comma ? ", " : ""); 2958 comma = 1; 2959 } 2960 if (t_flags & TF_CONGRECOVERY) { 2961 db_printf("%sTF_CONGRECOVERY", comma ? ", " : ""); 2962 comma = 1; 2963 } 2964 if (t_flags & TF_WASCRECOVERY) { 2965 db_printf("%sTF_WASCRECOVERY", comma ? ", " : ""); 2966 comma = 1; 2967 } 2968 if (t_flags & TF_FASTOPEN) { 2969 db_printf("%sTF_FASTOPEN", comma ? ", " : ""); 2970 comma = 1; 2971 } 2972 } 2973 2974 static void 2975 db_print_tflags2(u_int t_flags2) 2976 { 2977 int comma; 2978 2979 comma = 0; 2980 if (t_flags2 & TF2_PLPMTU_BLACKHOLE) { 2981 db_printf("%sTF2_PLPMTU_BLACKHOLE", comma ? ", " : ""); 2982 comma = 1; 2983 } 2984 if (t_flags2 & TF2_PLPMTU_PMTUD) { 2985 db_printf("%sTF2_PLPMTU_PMTUD", comma ? ", " : ""); 2986 comma = 1; 2987 } 2988 if (t_flags2 & TF2_PLPMTU_MAXSEGSNT) { 2989 db_printf("%sTF2_PLPMTU_MAXSEGSNT", comma ? ", " : ""); 2990 comma = 1; 2991 } 2992 if (t_flags2 & TF2_LOG_AUTO) { 2993 db_printf("%sTF2_LOG_AUTO", comma ? ", " : ""); 2994 comma = 1; 2995 } 2996 if (t_flags2 & TF2_DROP_AF_DATA) { 2997 db_printf("%sTF2_DROP_AF_DATA", comma ? ", " : ""); 2998 comma = 1; 2999 } 3000 if (t_flags2 & TF2_ECN_PERMIT) { 3001 db_printf("%sTF2_ECN_PERMIT", comma ? ", " : ""); 3002 comma = 1; 3003 } 3004 if (t_flags2 & TF2_ECN_SND_CWR) { 3005 db_printf("%sTF2_ECN_SND_CWR", comma ? ", " : ""); 3006 comma = 1; 3007 } 3008 if (t_flags2 & TF2_ECN_SND_ECE) { 3009 db_printf("%sTF2_ECN_SND_ECE", comma ? ", " : ""); 3010 comma = 1; 3011 } 3012 if (t_flags2 & TF2_ACE_PERMIT) { 3013 db_printf("%sTF2_ACE_PERMIT", comma ? ", " : ""); 3014 comma = 1; 3015 } 3016 if (t_flags2 & TF2_HPTS_CPU_SET) { 3017 db_printf("%sTF2_HPTS_CPU_SET", comma ? ", " : ""); 3018 comma = 1; 3019 } 3020 if (t_flags2 & TF2_FBYTES_COMPLETE) { 3021 db_printf("%sTF2_FBYTES_COMPLETE", comma ? ", " : ""); 3022 comma = 1; 3023 } 3024 if (t_flags2 & TF2_ECN_USE_ECT1) { 3025 db_printf("%sTF2_ECN_USE_ECT1", comma ? ", " : ""); 3026 comma = 1; 3027 } 3028 if (t_flags2 & TF2_TCP_ACCOUNTING) { 3029 db_printf("%sTF2_TCP_ACCOUNTING", comma ? ", " : ""); 3030 comma = 1; 3031 } 3032 if (t_flags2 & TF2_HPTS_CALLS) { 3033 db_printf("%sTF2_HPTS_CALLS", comma ? ", " : ""); 3034 comma = 1; 3035 } 3036 if (t_flags2 & TF2_MBUF_L_ACKS) { 3037 db_printf("%sTF2_MBUF_L_ACKS", comma ? ", " : ""); 3038 comma = 1; 3039 } 3040 if (t_flags2 & TF2_MBUF_ACKCMP) { 3041 db_printf("%sTF2_MBUF_ACKCMP", comma ? ", " : ""); 3042 comma = 1; 3043 } 3044 if (t_flags2 & TF2_SUPPORTS_MBUFQ) { 3045 db_printf("%sTF2_SUPPORTS_MBUFQ", comma ? ", " : ""); 3046 comma = 1; 3047 } 3048 if (t_flags2 & TF2_MBUF_QUEUE_READY) { 3049 db_printf("%sTF2_MBUF_QUEUE_READY", comma ? ", " : ""); 3050 comma = 1; 3051 } 3052 if (t_flags2 & TF2_DONT_SACK_QUEUE) { 3053 db_printf("%sTF2_DONT_SACK_QUEUE", comma ? ", " : ""); 3054 comma = 1; 3055 } 3056 if (t_flags2 & TF2_CANNOT_DO_ECN) { 3057 db_printf("%sTF2_CANNOT_DO_ECN", comma ? ", " : ""); 3058 comma = 1; 3059 } 3060 if (t_flags2 & TF2_NO_ISS_CHECK) { 3061 db_printf("%sTF2_NO_ISS_CHECK", comma ? ", " : ""); 3062 comma = 1; 3063 } 3064 } 3065 3066 static void 3067 db_print_toobflags(char t_oobflags) 3068 { 3069 int comma; 3070 3071 comma = 0; 3072 if (t_oobflags & TCPOOB_HAVEDATA) { 3073 db_printf("%sTCPOOB_HAVEDATA", comma ? ", " : ""); 3074 comma = 1; 3075 } 3076 if (t_oobflags & TCPOOB_HADDATA) { 3077 db_printf("%sTCPOOB_HADDATA", comma ? ", " : ""); 3078 comma = 1; 3079 } 3080 } 3081 3082 static void 3083 db_print_tcpcb(struct tcpcb *tp, const char *name, int indent) 3084 { 3085 3086 db_print_indent(indent); 3087 db_printf("%s at %p\n", name, tp); 3088 3089 indent += 2; 3090 3091 db_print_indent(indent); 3092 db_printf("t_segq first: %p t_segqlen: %d t_dupacks: %d\n", 3093 TAILQ_FIRST(&tp->t_segq), tp->t_segqlen, tp->t_dupacks); 3094 3095 db_print_indent(indent); 3096 db_printf("t_callout: %p t_timers: %p\n", 3097 &tp->t_callout, &tp->t_timers); 3098 3099 db_print_indent(indent); 3100 db_printf("t_state: %d (", tp->t_state); 3101 db_print_tstate(tp->t_state); 3102 db_printf(")\n"); 3103 3104 db_print_indent(indent); 3105 db_printf("t_flags: 0x%x (", tp->t_flags); 3106 db_print_tflags(tp->t_flags); 3107 db_printf(")\n"); 3108 3109 db_print_indent(indent); 3110 db_printf("t_flags2: 0x%x (", tp->t_flags2); 3111 db_print_tflags2(tp->t_flags2); 3112 db_printf(")\n"); 3113 3114 db_print_indent(indent); 3115 db_printf("snd_una: 0x%08x snd_max: 0x%08x snd_nxt: 0x%08x\n", 3116 tp->snd_una, tp->snd_max, tp->snd_nxt); 3117 3118 db_print_indent(indent); 3119 db_printf("snd_up: 0x%08x snd_wl1: 0x%08x snd_wl2: 0x%08x\n", 3120 tp->snd_up, tp->snd_wl1, tp->snd_wl2); 3121 3122 db_print_indent(indent); 3123 db_printf("iss: 0x%08x irs: 0x%08x rcv_nxt: 0x%08x\n", 3124 tp->iss, tp->irs, tp->rcv_nxt); 3125 3126 db_print_indent(indent); 3127 db_printf("rcv_adv: 0x%08x rcv_wnd: %u rcv_up: 0x%08x\n", 3128 tp->rcv_adv, tp->rcv_wnd, tp->rcv_up); 3129 3130 db_print_indent(indent); 3131 db_printf("snd_wnd: %u snd_cwnd: %u\n", 3132 tp->snd_wnd, tp->snd_cwnd); 3133 3134 db_print_indent(indent); 3135 db_printf("snd_ssthresh: %u snd_recover: " 3136 "0x%08x\n", tp->snd_ssthresh, tp->snd_recover); 3137 3138 db_print_indent(indent); 3139 db_printf("t_rcvtime: %u t_startime: %u\n", 3140 tp->t_rcvtime, tp->t_starttime); 3141 3142 db_print_indent(indent); 3143 db_printf("t_rttime: %u t_rtsq: 0x%08x\n", 3144 tp->t_rtttime, tp->t_rtseq); 3145 3146 db_print_indent(indent); 3147 db_printf("t_rxtcur: %d t_maxseg: %u t_srtt: %d\n", 3148 tp->t_rxtcur, tp->t_maxseg, tp->t_srtt); 3149 3150 db_print_indent(indent); 3151 db_printf("t_rttvar: %d t_rxtshift: %d t_rttmin: %u\n", 3152 tp->t_rttvar, tp->t_rxtshift, tp->t_rttmin); 3153 3154 db_print_indent(indent); 3155 db_printf("t_rttupdated: %u max_sndwnd: %u t_softerror: %d\n", 3156 tp->t_rttupdated, tp->max_sndwnd, tp->t_softerror); 3157 3158 db_print_indent(indent); 3159 db_printf("t_oobflags: 0x%x (", tp->t_oobflags); 3160 db_print_toobflags(tp->t_oobflags); 3161 db_printf(") t_iobc: 0x%02x\n", tp->t_iobc); 3162 3163 db_print_indent(indent); 3164 db_printf("snd_scale: %u rcv_scale: %u request_r_scale: %u\n", 3165 tp->snd_scale, tp->rcv_scale, tp->request_r_scale); 3166 3167 db_print_indent(indent); 3168 db_printf("ts_recent: %u ts_recent_age: %u\n", 3169 tp->ts_recent, tp->ts_recent_age); 3170 3171 db_print_indent(indent); 3172 db_printf("ts_offset: %u last_ack_sent: 0x%08x snd_cwnd_prev: " 3173 "%u\n", tp->ts_offset, tp->last_ack_sent, tp->snd_cwnd_prev); 3174 3175 db_print_indent(indent); 3176 db_printf("snd_ssthresh_prev: %u snd_recover_prev: 0x%08x " 3177 "t_badrxtwin: %u\n", tp->snd_ssthresh_prev, 3178 tp->snd_recover_prev, tp->t_badrxtwin); 3179 3180 db_print_indent(indent); 3181 db_printf("snd_numholes: %d snd_holes first: %p\n", 3182 tp->snd_numholes, TAILQ_FIRST(&tp->snd_holes)); 3183 3184 db_print_indent(indent); 3185 db_printf("snd_fack: 0x%08x rcv_numsacks: %d\n", 3186 tp->snd_fack, tp->rcv_numsacks); 3187 3188 /* Skip sackblks, sackhint. */ 3189 3190 db_print_indent(indent); 3191 db_printf("t_rttlow: %d rfbuf_ts: %u rfbuf_cnt: %d\n", 3192 tp->t_rttlow, tp->rfbuf_ts, tp->rfbuf_cnt); 3193 } 3194 3195 DB_SHOW_COMMAND(tcpcb, db_show_tcpcb) 3196 { 3197 struct tcpcb *tp; 3198 3199 if (!have_addr) { 3200 db_printf("usage: show tcpcb <addr>\n"); 3201 return; 3202 } 3203 tp = (struct tcpcb *)addr; 3204 3205 db_print_tcpcb(tp, "tcpcb", 0); 3206 } 3207 #endif 3208