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 __FBSDID("$FreeBSD$"); 42 43 #include "opt_ddb.h" 44 #include "opt_inet.h" 45 #include "opt_inet6.h" 46 #include "opt_ipsec.h" 47 #include "opt_kern_tls.h" 48 #include "opt_tcpdebug.h" 49 50 #include <sys/param.h> 51 #include <sys/systm.h> 52 #include <sys/arb.h> 53 #include <sys/limits.h> 54 #include <sys/malloc.h> 55 #include <sys/refcount.h> 56 #include <sys/kernel.h> 57 #include <sys/ktls.h> 58 #include <sys/qmath.h> 59 #include <sys/sysctl.h> 60 #include <sys/mbuf.h> 61 #ifdef INET6 62 #include <sys/domain.h> 63 #endif /* INET6 */ 64 #include <sys/socket.h> 65 #include <sys/socketvar.h> 66 #include <sys/protosw.h> 67 #include <sys/proc.h> 68 #include <sys/jail.h> 69 #include <sys/stats.h> 70 71 #ifdef DDB 72 #include <ddb/ddb.h> 73 #endif 74 75 #include <net/if.h> 76 #include <net/if_var.h> 77 #include <net/route.h> 78 #include <net/vnet.h> 79 80 #include <netinet/in.h> 81 #include <netinet/in_kdtrace.h> 82 #include <netinet/in_pcb.h> 83 #include <netinet/in_systm.h> 84 #include <netinet/in_var.h> 85 #include <netinet/ip.h> 86 #include <netinet/ip_var.h> 87 #ifdef INET6 88 #include <netinet/ip6.h> 89 #include <netinet6/in6_pcb.h> 90 #include <netinet6/ip6_var.h> 91 #include <netinet6/scope6_var.h> 92 #endif 93 #include <netinet/tcp.h> 94 #include <netinet/tcp_fsm.h> 95 #include <netinet/tcp_seq.h> 96 #include <netinet/tcp_timer.h> 97 #include <netinet/tcp_var.h> 98 #include <netinet/tcp_log_buf.h> 99 #include <netinet/tcpip.h> 100 #include <netinet/cc/cc.h> 101 #include <netinet/tcp_fastopen.h> 102 #include <netinet/tcp_hpts.h> 103 #ifdef TCPPCAP 104 #include <netinet/tcp_pcap.h> 105 #endif 106 #include <netinet/tcp_debug.h> 107 #ifdef TCP_OFFLOAD 108 #include <netinet/tcp_offload.h> 109 #endif 110 #include <netipsec/ipsec_support.h> 111 112 #include <vm/vm.h> 113 #include <vm/vm_param.h> 114 #include <vm/pmap.h> 115 #include <vm/vm_extern.h> 116 #include <vm/vm_map.h> 117 #include <vm/vm_page.h> 118 119 /* 120 * TCP protocol interface to socket abstraction. 121 */ 122 #ifdef INET 123 static int tcp_connect(struct tcpcb *, struct sockaddr *, 124 struct thread *td); 125 #endif /* INET */ 126 #ifdef INET6 127 static int tcp6_connect(struct tcpcb *, struct sockaddr *, 128 struct thread *td); 129 #endif /* INET6 */ 130 static void tcp_disconnect(struct tcpcb *); 131 static void tcp_usrclosed(struct tcpcb *); 132 static void tcp_fill_info(struct tcpcb *, struct tcp_info *); 133 134 static int tcp_pru_options_support(struct tcpcb *tp, int flags); 135 136 #ifdef TCPDEBUG 137 #define TCPDEBUG0 int ostate = 0 138 #define TCPDEBUG1() ostate = tp ? tp->t_state : 0 139 #define TCPDEBUG2(req) if (tp && (so->so_options & SO_DEBUG)) \ 140 tcp_trace(TA_USER, ostate, tp, 0, 0, req) 141 #else 142 #define TCPDEBUG0 143 #define TCPDEBUG1() 144 #define TCPDEBUG2(req) 145 #endif 146 147 /* 148 * tcp_require_unique port requires a globally-unique source port for each 149 * outgoing connection. The default is to require the 4-tuple to be unique. 150 */ 151 VNET_DEFINE(int, tcp_require_unique_port) = 0; 152 SYSCTL_INT(_net_inet_tcp, OID_AUTO, require_unique_port, 153 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(tcp_require_unique_port), 0, 154 "Require globally-unique ephemeral port for outgoing connections"); 155 #define V_tcp_require_unique_port VNET(tcp_require_unique_port) 156 157 /* 158 * TCP attaches to socket via pru_attach(), reserving space, 159 * and an internet control block. 160 */ 161 static int 162 tcp_usr_attach(struct socket *so, int proto, struct thread *td) 163 { 164 struct inpcb *inp; 165 struct tcpcb *tp = NULL; 166 int error; 167 TCPDEBUG0; 168 169 inp = sotoinpcb(so); 170 KASSERT(inp == NULL, ("tcp_usr_attach: inp != NULL")); 171 TCPDEBUG1(); 172 173 error = soreserve(so, V_tcp_sendspace, V_tcp_recvspace); 174 if (error) 175 goto out; 176 177 so->so_rcv.sb_flags |= SB_AUTOSIZE; 178 so->so_snd.sb_flags |= SB_AUTOSIZE; 179 error = in_pcballoc(so, &V_tcbinfo); 180 if (error) 181 goto out; 182 inp = sotoinpcb(so); 183 tp = tcp_newtcpcb(inp); 184 if (tp == NULL) { 185 error = ENOBUFS; 186 in_pcbdetach(inp); 187 in_pcbfree(inp); 188 goto out; 189 } 190 tp->t_state = TCPS_CLOSED; 191 INP_WUNLOCK(inp); 192 TCPSTATES_INC(TCPS_CLOSED); 193 out: 194 TCPDEBUG2(PRU_ATTACH); 195 TCP_PROBE2(debug__user, tp, PRU_ATTACH); 196 return (error); 197 } 198 199 /* 200 * tcp_usr_detach is called when the socket layer loses its final reference 201 * to the socket, be it a file descriptor reference, a reference from TCP, 202 * etc. At this point, there is only one case in which we will keep around 203 * inpcb state: time wait. 204 */ 205 static void 206 tcp_usr_detach(struct socket *so) 207 { 208 struct inpcb *inp; 209 struct tcpcb *tp; 210 211 inp = sotoinpcb(so); 212 KASSERT(inp != NULL, ("%s: inp == NULL", __func__)); 213 INP_WLOCK(inp); 214 KASSERT(so->so_pcb == inp && inp->inp_socket == so, 215 ("%s: socket %p inp %p mismatch", __func__, so, inp)); 216 217 tp = intotcpcb(inp); 218 219 KASSERT(inp->inp_flags & INP_DROPPED || 220 tp->t_state < TCPS_SYN_SENT, 221 ("%s: inp %p not dropped or embryonic", __func__, inp)); 222 223 tcp_discardcb(tp); 224 in_pcbdetach(inp); 225 in_pcbfree(inp); 226 } 227 228 #ifdef INET 229 /* 230 * Give the socket an address. 231 */ 232 static int 233 tcp_usr_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 234 { 235 int error = 0; 236 struct inpcb *inp; 237 #ifdef KDTRACE_HOOKS 238 struct tcpcb *tp = NULL; 239 #endif 240 struct sockaddr_in *sinp; 241 242 sinp = (struct sockaddr_in *)nam; 243 if (nam->sa_family != AF_INET) { 244 /* 245 * Preserve compatibility with old programs. 246 */ 247 if (nam->sa_family != AF_UNSPEC || 248 nam->sa_len < offsetof(struct sockaddr_in, sin_zero) || 249 sinp->sin_addr.s_addr != INADDR_ANY) 250 return (EAFNOSUPPORT); 251 nam->sa_family = AF_INET; 252 } 253 if (nam->sa_len != sizeof(*sinp)) 254 return (EINVAL); 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 return (EAFNOSUPPORT); 262 263 TCPDEBUG0; 264 inp = sotoinpcb(so); 265 KASSERT(inp != NULL, ("tcp_usr_bind: inp == NULL")); 266 INP_WLOCK(inp); 267 if (inp->inp_flags & INP_DROPPED) { 268 error = EINVAL; 269 goto out; 270 } 271 #ifdef KDTRACE_HOOKS 272 tp = intotcpcb(inp); 273 #endif 274 TCPDEBUG1(); 275 INP_HASH_WLOCK(&V_tcbinfo); 276 error = in_pcbbind(inp, nam, td->td_ucred); 277 INP_HASH_WUNLOCK(&V_tcbinfo); 278 out: 279 TCPDEBUG2(PRU_BIND); 280 TCP_PROBE2(debug__user, tp, PRU_BIND); 281 INP_WUNLOCK(inp); 282 283 return (error); 284 } 285 #endif /* INET */ 286 287 #ifdef INET6 288 static int 289 tcp6_usr_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 290 { 291 int error = 0; 292 struct inpcb *inp; 293 #ifdef KDTRACE_HOOKS 294 struct tcpcb *tp = NULL; 295 #endif 296 struct sockaddr_in6 *sin6; 297 u_char vflagsav; 298 299 sin6 = (struct sockaddr_in6 *)nam; 300 if (nam->sa_family != AF_INET6) 301 return (EAFNOSUPPORT); 302 if (nam->sa_len != sizeof(*sin6)) 303 return (EINVAL); 304 305 /* 306 * Must check for multicast addresses and disallow binding 307 * to them. 308 */ 309 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 310 return (EAFNOSUPPORT); 311 312 TCPDEBUG0; 313 inp = sotoinpcb(so); 314 KASSERT(inp != NULL, ("tcp6_usr_bind: inp == NULL")); 315 INP_WLOCK(inp); 316 vflagsav = inp->inp_vflag; 317 if (inp->inp_flags & INP_DROPPED) { 318 error = EINVAL; 319 goto out; 320 } 321 #ifdef KDTRACE_HOOKS 322 tp = intotcpcb(inp); 323 #endif 324 TCPDEBUG1(); 325 INP_HASH_WLOCK(&V_tcbinfo); 326 inp->inp_vflag &= ~INP_IPV4; 327 inp->inp_vflag |= INP_IPV6; 328 #ifdef INET 329 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 330 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 331 inp->inp_vflag |= INP_IPV4; 332 else if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 333 struct sockaddr_in sin; 334 335 in6_sin6_2_sin(&sin, sin6); 336 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 337 error = EAFNOSUPPORT; 338 INP_HASH_WUNLOCK(&V_tcbinfo); 339 goto out; 340 } 341 inp->inp_vflag |= INP_IPV4; 342 inp->inp_vflag &= ~INP_IPV6; 343 error = in_pcbbind(inp, (struct sockaddr *)&sin, 344 td->td_ucred); 345 INP_HASH_WUNLOCK(&V_tcbinfo); 346 goto out; 347 } 348 } 349 #endif 350 error = in6_pcbbind(inp, nam, td->td_ucred); 351 INP_HASH_WUNLOCK(&V_tcbinfo); 352 out: 353 if (error != 0) 354 inp->inp_vflag = vflagsav; 355 TCPDEBUG2(PRU_BIND); 356 TCP_PROBE2(debug__user, tp, PRU_BIND); 357 INP_WUNLOCK(inp); 358 return (error); 359 } 360 #endif /* INET6 */ 361 362 #ifdef INET 363 /* 364 * Prepare to accept connections. 365 */ 366 static int 367 tcp_usr_listen(struct socket *so, int backlog, struct thread *td) 368 { 369 int error = 0; 370 struct inpcb *inp; 371 struct tcpcb *tp = NULL; 372 373 TCPDEBUG0; 374 inp = sotoinpcb(so); 375 KASSERT(inp != NULL, ("tcp_usr_listen: inp == NULL")); 376 INP_WLOCK(inp); 377 if (inp->inp_flags & INP_DROPPED) { 378 error = EINVAL; 379 goto out; 380 } 381 tp = intotcpcb(inp); 382 TCPDEBUG1(); 383 SOCK_LOCK(so); 384 error = solisten_proto_check(so); 385 if (error != 0) { 386 SOCK_UNLOCK(so); 387 goto out; 388 } 389 if (inp->inp_lport == 0) { 390 INP_HASH_WLOCK(&V_tcbinfo); 391 error = in_pcbbind(inp, NULL, td->td_ucred); 392 INP_HASH_WUNLOCK(&V_tcbinfo); 393 } 394 if (error == 0) { 395 tcp_state_change(tp, TCPS_LISTEN); 396 solisten_proto(so, backlog); 397 #ifdef TCP_OFFLOAD 398 if ((so->so_options & SO_NO_OFFLOAD) == 0) 399 tcp_offload_listen_start(tp); 400 #endif 401 } else { 402 solisten_proto_abort(so); 403 } 404 SOCK_UNLOCK(so); 405 406 if (IS_FASTOPEN(tp->t_flags)) 407 tp->t_tfo_pending = tcp_fastopen_alloc_counter(); 408 409 out: 410 TCPDEBUG2(PRU_LISTEN); 411 TCP_PROBE2(debug__user, tp, PRU_LISTEN); 412 INP_WUNLOCK(inp); 413 return (error); 414 } 415 #endif /* INET */ 416 417 #ifdef INET6 418 static int 419 tcp6_usr_listen(struct socket *so, int backlog, struct thread *td) 420 { 421 int error = 0; 422 struct inpcb *inp; 423 struct tcpcb *tp = NULL; 424 u_char vflagsav; 425 426 TCPDEBUG0; 427 inp = sotoinpcb(so); 428 KASSERT(inp != NULL, ("tcp6_usr_listen: inp == NULL")); 429 INP_WLOCK(inp); 430 if (inp->inp_flags & INP_DROPPED) { 431 error = EINVAL; 432 goto out; 433 } 434 vflagsav = inp->inp_vflag; 435 tp = intotcpcb(inp); 436 TCPDEBUG1(); 437 SOCK_LOCK(so); 438 error = solisten_proto_check(so); 439 if (error != 0) { 440 SOCK_UNLOCK(so); 441 goto out; 442 } 443 INP_HASH_WLOCK(&V_tcbinfo); 444 if (inp->inp_lport == 0) { 445 inp->inp_vflag &= ~INP_IPV4; 446 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) 447 inp->inp_vflag |= INP_IPV4; 448 error = in6_pcbbind(inp, NULL, td->td_ucred); 449 } 450 INP_HASH_WUNLOCK(&V_tcbinfo); 451 if (error == 0) { 452 tcp_state_change(tp, TCPS_LISTEN); 453 solisten_proto(so, backlog); 454 #ifdef TCP_OFFLOAD 455 if ((so->so_options & SO_NO_OFFLOAD) == 0) 456 tcp_offload_listen_start(tp); 457 #endif 458 } else { 459 solisten_proto_abort(so); 460 } 461 SOCK_UNLOCK(so); 462 463 if (IS_FASTOPEN(tp->t_flags)) 464 tp->t_tfo_pending = tcp_fastopen_alloc_counter(); 465 466 if (error != 0) 467 inp->inp_vflag = vflagsav; 468 469 out: 470 TCPDEBUG2(PRU_LISTEN); 471 TCP_PROBE2(debug__user, tp, PRU_LISTEN); 472 INP_WUNLOCK(inp); 473 return (error); 474 } 475 #endif /* INET6 */ 476 477 #ifdef INET 478 /* 479 * Initiate connection to peer. 480 * Create a template for use in transmissions on this connection. 481 * Enter SYN_SENT state, and mark socket as connecting. 482 * Start keep-alive timer, and seed output sequence space. 483 * Send initial segment on connection. 484 */ 485 static int 486 tcp_usr_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 487 { 488 struct epoch_tracker et; 489 int error = 0; 490 struct inpcb *inp; 491 struct tcpcb *tp = NULL; 492 struct sockaddr_in *sinp; 493 494 sinp = (struct sockaddr_in *)nam; 495 if (nam->sa_family != AF_INET) 496 return (EAFNOSUPPORT); 497 if (nam->sa_len != sizeof (*sinp)) 498 return (EINVAL); 499 500 /* 501 * Must disallow TCP ``connections'' to multicast addresses. 502 */ 503 if (IN_MULTICAST(ntohl(sinp->sin_addr.s_addr))) 504 return (EAFNOSUPPORT); 505 if (ntohl(sinp->sin_addr.s_addr) == INADDR_BROADCAST) 506 return (EACCES); 507 if ((error = prison_remote_ip4(td->td_ucred, &sinp->sin_addr)) != 0) 508 return (error); 509 510 TCPDEBUG0; 511 inp = sotoinpcb(so); 512 KASSERT(inp != NULL, ("tcp_usr_connect: inp == NULL")); 513 INP_WLOCK(inp); 514 if (inp->inp_flags & INP_DROPPED) { 515 error = ECONNREFUSED; 516 goto out; 517 } 518 if (SOLISTENING(so)) { 519 error = EOPNOTSUPP; 520 goto out; 521 } 522 tp = intotcpcb(inp); 523 TCPDEBUG1(); 524 NET_EPOCH_ENTER(et); 525 if ((error = tcp_connect(tp, nam, td)) != 0) 526 goto out_in_epoch; 527 #ifdef TCP_OFFLOAD 528 if (registered_toedevs > 0 && 529 (so->so_options & SO_NO_OFFLOAD) == 0 && 530 (error = tcp_offload_connect(so, nam)) == 0) 531 goto out_in_epoch; 532 #endif 533 tcp_timer_activate(tp, TT_KEEP, TP_KEEPINIT(tp)); 534 error = tcp_output(tp); 535 KASSERT(error >= 0, ("TCP stack %s requested tcp_drop(%p) at connect()" 536 ", error code %d", tp->t_fb->tfb_tcp_block_name, tp, -error)); 537 out_in_epoch: 538 NET_EPOCH_EXIT(et); 539 out: 540 TCPDEBUG2(PRU_CONNECT); 541 TCP_PROBE2(debug__user, tp, PRU_CONNECT); 542 INP_WUNLOCK(inp); 543 return (error); 544 } 545 #endif /* INET */ 546 547 #ifdef INET6 548 static int 549 tcp6_usr_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 550 { 551 struct epoch_tracker et; 552 int error = 0; 553 struct inpcb *inp; 554 struct tcpcb *tp = NULL; 555 struct sockaddr_in6 *sin6; 556 u_int8_t incflagsav; 557 u_char vflagsav; 558 559 TCPDEBUG0; 560 561 sin6 = (struct sockaddr_in6 *)nam; 562 if (nam->sa_family != AF_INET6) 563 return (EAFNOSUPPORT); 564 if (nam->sa_len != sizeof (*sin6)) 565 return (EINVAL); 566 567 /* 568 * Must disallow TCP ``connections'' to multicast addresses. 569 */ 570 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 571 return (EAFNOSUPPORT); 572 573 inp = sotoinpcb(so); 574 KASSERT(inp != NULL, ("tcp6_usr_connect: inp == NULL")); 575 INP_WLOCK(inp); 576 vflagsav = inp->inp_vflag; 577 incflagsav = inp->inp_inc.inc_flags; 578 if (inp->inp_flags & INP_DROPPED) { 579 error = ECONNREFUSED; 580 goto out; 581 } 582 if (SOLISTENING(so)) { 583 error = EINVAL; 584 goto out; 585 } 586 tp = intotcpcb(inp); 587 TCPDEBUG1(); 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, (struct sockaddr *)&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, nam, 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 TCPDEBUG2(PRU_CONNECT); 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 int error = 0; 693 694 TCPDEBUG0; 695 NET_EPOCH_ENTER(et); 696 inp = sotoinpcb(so); 697 KASSERT(inp != NULL, ("tcp_usr_disconnect: inp == NULL")); 698 INP_WLOCK(inp); 699 if (inp->inp_flags & INP_DROPPED) { 700 error = ECONNRESET; 701 goto out; 702 } 703 tp = intotcpcb(inp); 704 TCPDEBUG1(); 705 tcp_disconnect(tp); 706 out: 707 TCPDEBUG2(PRU_DISCONNECT); 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 = NULL; 724 #ifdef KDTRACE_HOOKS 725 struct tcpcb *tp = NULL; 726 #endif 727 struct in_addr addr; 728 in_port_t port = 0; 729 TCPDEBUG0; 730 731 if (so->so_state & SS_ISDISCONNECTED) 732 return (ECONNABORTED); 733 734 inp = sotoinpcb(so); 735 KASSERT(inp != NULL, ("tcp_usr_accept: inp == NULL")); 736 INP_WLOCK(inp); 737 if (inp->inp_flags & INP_DROPPED) { 738 error = ECONNABORTED; 739 goto out; 740 } 741 #ifdef KDTRACE_HOOKS 742 tp = intotcpcb(inp); 743 #endif 744 TCPDEBUG1(); 745 746 /* 747 * We inline in_getpeeraddr and COMMON_END here, so that we can 748 * copy the data of interest and defer the malloc until after we 749 * release the lock. 750 */ 751 port = inp->inp_fport; 752 addr = inp->inp_faddr; 753 754 out: 755 TCPDEBUG2(PRU_ACCEPT); 756 TCP_PROBE2(debug__user, tp, PRU_ACCEPT); 757 INP_WUNLOCK(inp); 758 if (error == 0) 759 *nam = in_sockaddr(port, &addr); 760 return error; 761 } 762 #endif /* INET */ 763 764 #ifdef INET6 765 static int 766 tcp6_usr_accept(struct socket *so, struct sockaddr **nam) 767 { 768 struct inpcb *inp = NULL; 769 int error = 0; 770 #ifdef KDTRACE_HOOKS 771 struct tcpcb *tp = NULL; 772 #endif 773 struct in_addr addr; 774 struct in6_addr addr6; 775 struct epoch_tracker et; 776 in_port_t port = 0; 777 int v4 = 0; 778 TCPDEBUG0; 779 780 if (so->so_state & SS_ISDISCONNECTED) 781 return (ECONNABORTED); 782 783 inp = sotoinpcb(so); 784 KASSERT(inp != NULL, ("tcp6_usr_accept: inp == NULL")); 785 NET_EPOCH_ENTER(et); 786 INP_WLOCK(inp); 787 if (inp->inp_flags & INP_DROPPED) { 788 error = ECONNABORTED; 789 goto out; 790 } 791 #ifdef KDTRACE_HOOKS 792 tp = intotcpcb(inp); 793 #endif 794 TCPDEBUG1(); 795 796 /* 797 * We inline in6_mapped_peeraddr and COMMON_END here, so that we can 798 * copy the data of interest and defer the malloc until after we 799 * release the lock. 800 */ 801 if (inp->inp_vflag & INP_IPV4) { 802 v4 = 1; 803 port = inp->inp_fport; 804 addr = inp->inp_faddr; 805 } else { 806 port = inp->inp_fport; 807 addr6 = inp->in6p_faddr; 808 } 809 810 out: 811 TCPDEBUG2(PRU_ACCEPT); 812 TCP_PROBE2(debug__user, tp, PRU_ACCEPT); 813 INP_WUNLOCK(inp); 814 NET_EPOCH_EXIT(et); 815 if (error == 0) { 816 if (v4) 817 *nam = in6_v4mapsin6_sockaddr(port, &addr); 818 else 819 *nam = in6_sockaddr(port, &addr6); 820 } 821 return error; 822 } 823 #endif /* INET6 */ 824 825 /* 826 * Mark the connection as being incapable of further output. 827 */ 828 static int 829 tcp_usr_shutdown(struct socket *so) 830 { 831 int error = 0; 832 struct inpcb *inp; 833 struct tcpcb *tp = NULL; 834 struct epoch_tracker et; 835 836 TCPDEBUG0; 837 inp = sotoinpcb(so); 838 KASSERT(inp != NULL, ("inp == NULL")); 839 INP_WLOCK(inp); 840 if (inp->inp_flags & INP_DROPPED) { 841 INP_WUNLOCK(inp); 842 return (ECONNRESET); 843 } 844 tp = intotcpcb(inp); 845 NET_EPOCH_ENTER(et); 846 TCPDEBUG1(); 847 socantsendmore(so); 848 tcp_usrclosed(tp); 849 if (!(inp->inp_flags & INP_DROPPED)) 850 error = tcp_output_nodrop(tp); 851 TCPDEBUG2(PRU_SHUTDOWN); 852 TCP_PROBE2(debug__user, tp, PRU_SHUTDOWN); 853 error = tcp_unlock_or_drop(tp, error); 854 NET_EPOCH_EXIT(et); 855 856 return (error); 857 } 858 859 /* 860 * After a receive, possibly send window update to peer. 861 */ 862 static int 863 tcp_usr_rcvd(struct socket *so, int flags) 864 { 865 struct epoch_tracker et; 866 struct inpcb *inp; 867 struct tcpcb *tp = NULL; 868 int outrv = 0, error = 0; 869 870 TCPDEBUG0; 871 inp = sotoinpcb(so); 872 KASSERT(inp != NULL, ("tcp_usr_rcvd: inp == NULL")); 873 INP_WLOCK(inp); 874 if (inp->inp_flags & INP_DROPPED) { 875 INP_WUNLOCK(inp); 876 return (ECONNRESET); 877 } 878 tp = intotcpcb(inp); 879 NET_EPOCH_ENTER(et); 880 TCPDEBUG1(); 881 /* 882 * For passively-created TFO connections, don't attempt a window 883 * update while still in SYN_RECEIVED as this may trigger an early 884 * SYN|ACK. It is preferable to have the SYN|ACK be sent along with 885 * application response data, or failing that, when the DELACK timer 886 * expires. 887 */ 888 if (IS_FASTOPEN(tp->t_flags) && 889 (tp->t_state == TCPS_SYN_RECEIVED)) 890 goto out; 891 #ifdef TCP_OFFLOAD 892 if (tp->t_flags & TF_TOE) 893 tcp_offload_rcvd(tp); 894 else 895 #endif 896 outrv = tcp_output_nodrop(tp); 897 out: 898 TCPDEBUG2(PRU_RCVD); 899 TCP_PROBE2(debug__user, tp, PRU_RCVD); 900 (void) tcp_unlock_or_drop(tp, outrv); 901 NET_EPOCH_EXIT(et); 902 return (error); 903 } 904 905 /* 906 * Do a send by putting data in output queue and updating urgent 907 * marker if URG set. Possibly send more data. Unlike the other 908 * pru_*() routines, the mbuf chains are our responsibility. We 909 * must either enqueue them or free them. The other pru_* routines 910 * generally are caller-frees. 911 */ 912 static int 913 tcp_usr_send(struct socket *so, int flags, struct mbuf *m, 914 struct sockaddr *nam, struct mbuf *control, struct thread *td) 915 { 916 struct epoch_tracker et; 917 int error = 0; 918 struct inpcb *inp; 919 struct tcpcb *tp = NULL; 920 #ifdef INET 921 #ifdef INET6 922 struct sockaddr_in sin; 923 #endif 924 struct sockaddr_in *sinp; 925 #endif 926 #ifdef INET6 927 int isipv6; 928 #endif 929 u_int8_t incflagsav; 930 u_char vflagsav; 931 bool restoreflags; 932 TCPDEBUG0; 933 934 if (control != NULL) { 935 /* TCP doesn't do control messages (rights, creds, etc) */ 936 if (control->m_len) { 937 m_freem(control); 938 return (EINVAL); 939 } 940 m_freem(control); /* empty control, just free it */ 941 } 942 943 inp = sotoinpcb(so); 944 KASSERT(inp != NULL, ("tcp_usr_send: inp == NULL")); 945 INP_WLOCK(inp); 946 if (inp->inp_flags & INP_DROPPED) { 947 if (m != NULL && (flags & PRUS_NOTREADY) == 0) 948 m_freem(m); 949 INP_WUNLOCK(inp); 950 return (ECONNRESET); 951 } 952 953 vflagsav = inp->inp_vflag; 954 incflagsav = inp->inp_inc.inc_flags; 955 restoreflags = false; 956 tp = intotcpcb(inp); 957 958 NET_EPOCH_ENTER(et); 959 if ((flags & PRUS_OOB) != 0 && 960 (error = tcp_pru_options_support(tp, PRUS_OOB)) != 0) 961 goto out; 962 963 TCPDEBUG1(); 964 if (nam != NULL && tp->t_state < TCPS_SYN_SENT) { 965 if (tp->t_state == TCPS_LISTEN) { 966 error = EINVAL; 967 goto out; 968 } 969 switch (nam->sa_family) { 970 #ifdef INET 971 case AF_INET: 972 sinp = (struct sockaddr_in *)nam; 973 if (sinp->sin_len != sizeof(struct sockaddr_in)) { 974 error = EINVAL; 975 goto out; 976 } 977 if ((inp->inp_vflag & INP_IPV6) != 0) { 978 error = EAFNOSUPPORT; 979 goto out; 980 } 981 if (IN_MULTICAST(ntohl(sinp->sin_addr.s_addr))) { 982 error = EAFNOSUPPORT; 983 goto out; 984 } 985 if (ntohl(sinp->sin_addr.s_addr) == INADDR_BROADCAST) { 986 error = EACCES; 987 goto out; 988 } 989 if ((error = prison_remote_ip4(td->td_ucred, 990 &sinp->sin_addr))) 991 goto out; 992 #ifdef INET6 993 isipv6 = 0; 994 #endif 995 break; 996 #endif /* INET */ 997 #ifdef INET6 998 case AF_INET6: 999 { 1000 struct sockaddr_in6 *sin6; 1001 1002 sin6 = (struct sockaddr_in6 *)nam; 1003 if (sin6->sin6_len != sizeof(*sin6)) { 1004 error = EINVAL; 1005 goto out; 1006 } 1007 if ((inp->inp_vflag & INP_IPV6PROTO) == 0) { 1008 error = EAFNOSUPPORT; 1009 goto out; 1010 } 1011 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 1012 error = EAFNOSUPPORT; 1013 goto out; 1014 } 1015 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 1016 #ifdef INET 1017 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0) { 1018 error = EINVAL; 1019 goto out; 1020 } 1021 if ((inp->inp_vflag & INP_IPV4) == 0) { 1022 error = EAFNOSUPPORT; 1023 goto out; 1024 } 1025 restoreflags = true; 1026 inp->inp_vflag &= ~INP_IPV6; 1027 sinp = &sin; 1028 in6_sin6_2_sin(sinp, sin6); 1029 if (IN_MULTICAST( 1030 ntohl(sinp->sin_addr.s_addr))) { 1031 error = EAFNOSUPPORT; 1032 goto out; 1033 } 1034 if ((error = prison_remote_ip4(td->td_ucred, 1035 &sinp->sin_addr))) 1036 goto out; 1037 isipv6 = 0; 1038 #else /* !INET */ 1039 error = EAFNOSUPPORT; 1040 goto out; 1041 #endif /* INET */ 1042 } else { 1043 if ((inp->inp_vflag & INP_IPV6) == 0) { 1044 error = EAFNOSUPPORT; 1045 goto out; 1046 } 1047 restoreflags = true; 1048 inp->inp_vflag &= ~INP_IPV4; 1049 inp->inp_inc.inc_flags |= INC_ISIPV6; 1050 if ((error = prison_remote_ip6(td->td_ucred, 1051 &sin6->sin6_addr))) 1052 goto out; 1053 isipv6 = 1; 1054 } 1055 break; 1056 } 1057 #endif /* INET6 */ 1058 default: 1059 error = EAFNOSUPPORT; 1060 goto out; 1061 } 1062 } 1063 if (!(flags & PRUS_OOB)) { 1064 if (tp->t_acktime == 0) 1065 tp->t_acktime = ticks; 1066 sbappendstream(&so->so_snd, m, flags); 1067 m = NULL; 1068 if (nam && tp->t_state < TCPS_SYN_SENT) { 1069 KASSERT(tp->t_state == TCPS_CLOSED, 1070 ("%s: tp %p is listening", __func__, tp)); 1071 1072 /* 1073 * Do implied connect if not yet connected, 1074 * initialize window to default value, and 1075 * initialize maxseg using peer's cached MSS. 1076 */ 1077 #ifdef INET6 1078 if (isipv6) 1079 error = tcp6_connect(tp, nam, td); 1080 #endif /* INET6 */ 1081 #if defined(INET6) && defined(INET) 1082 else 1083 #endif 1084 #ifdef INET 1085 error = tcp_connect(tp, 1086 (struct sockaddr *)sinp, td); 1087 #endif 1088 /* 1089 * The bind operation in tcp_connect succeeded. We 1090 * no longer want to restore the flags if later 1091 * operations fail. 1092 */ 1093 if (error == 0 || inp->inp_lport != 0) 1094 restoreflags = false; 1095 1096 if (error) { 1097 /* m is freed if PRUS_NOTREADY is unset. */ 1098 sbflush(&so->so_snd); 1099 goto out; 1100 } 1101 if (IS_FASTOPEN(tp->t_flags)) 1102 tcp_fastopen_connect(tp); 1103 else { 1104 tp->snd_wnd = TTCP_CLIENT_SND_WND; 1105 tcp_mss(tp, -1); 1106 } 1107 } 1108 if (flags & PRUS_EOF) { 1109 /* 1110 * Close the send side of the connection after 1111 * the data is sent. 1112 */ 1113 socantsendmore(so); 1114 tcp_usrclosed(tp); 1115 } 1116 if (TCPS_HAVEESTABLISHED(tp->t_state) && 1117 ((tp->t_flags2 & TF2_FBYTES_COMPLETE) == 0) && 1118 (tp->t_fbyte_out == 0) && 1119 (so->so_snd.sb_ccc > 0)) { 1120 tp->t_fbyte_out = ticks; 1121 if (tp->t_fbyte_out == 0) 1122 tp->t_fbyte_out = 1; 1123 if (tp->t_fbyte_out && tp->t_fbyte_in) 1124 tp->t_flags2 |= TF2_FBYTES_COMPLETE; 1125 } 1126 if (!(inp->inp_flags & INP_DROPPED) && 1127 !(flags & PRUS_NOTREADY)) { 1128 if (flags & PRUS_MORETOCOME) 1129 tp->t_flags |= TF_MORETOCOME; 1130 error = tcp_output_nodrop(tp); 1131 if (flags & PRUS_MORETOCOME) 1132 tp->t_flags &= ~TF_MORETOCOME; 1133 } 1134 } else { 1135 /* 1136 * XXXRW: PRUS_EOF not implemented with PRUS_OOB? 1137 */ 1138 SOCKBUF_LOCK(&so->so_snd); 1139 if (sbspace(&so->so_snd) < -512) { 1140 SOCKBUF_UNLOCK(&so->so_snd); 1141 error = ENOBUFS; 1142 goto out; 1143 } 1144 /* 1145 * According to RFC961 (Assigned Protocols), 1146 * the urgent pointer points to the last octet 1147 * of urgent data. We continue, however, 1148 * to consider it to indicate the first octet 1149 * of data past the urgent section. 1150 * Otherwise, snd_up should be one lower. 1151 */ 1152 if (tp->t_acktime == 0) 1153 tp->t_acktime = ticks; 1154 sbappendstream_locked(&so->so_snd, m, flags); 1155 SOCKBUF_UNLOCK(&so->so_snd); 1156 m = NULL; 1157 if (nam && tp->t_state < TCPS_SYN_SENT) { 1158 /* 1159 * Do implied connect if not yet connected, 1160 * initialize window to default value, and 1161 * initialize maxseg using peer's cached MSS. 1162 */ 1163 1164 /* 1165 * Not going to contemplate SYN|URG 1166 */ 1167 if (IS_FASTOPEN(tp->t_flags)) 1168 tp->t_flags &= ~TF_FASTOPEN; 1169 #ifdef INET6 1170 if (isipv6) 1171 error = tcp6_connect(tp, nam, td); 1172 #endif /* INET6 */ 1173 #if defined(INET6) && defined(INET) 1174 else 1175 #endif 1176 #ifdef INET 1177 error = tcp_connect(tp, 1178 (struct sockaddr *)sinp, td); 1179 #endif 1180 /* 1181 * The bind operation in tcp_connect succeeded. We 1182 * no longer want to restore the flags if later 1183 * operations fail. 1184 */ 1185 if (error == 0 || inp->inp_lport != 0) 1186 restoreflags = false; 1187 1188 if (error != 0) { 1189 /* m is freed if PRUS_NOTREADY is unset. */ 1190 sbflush(&so->so_snd); 1191 goto out; 1192 } 1193 tp->snd_wnd = TTCP_CLIENT_SND_WND; 1194 tcp_mss(tp, -1); 1195 } 1196 tp->snd_up = tp->snd_una + sbavail(&so->so_snd); 1197 if ((flags & PRUS_NOTREADY) == 0) { 1198 tp->t_flags |= TF_FORCEDATA; 1199 error = tcp_output_nodrop(tp); 1200 tp->t_flags &= ~TF_FORCEDATA; 1201 } 1202 } 1203 TCP_LOG_EVENT(tp, NULL, 1204 &inp->inp_socket->so_rcv, 1205 &inp->inp_socket->so_snd, 1206 TCP_LOG_USERSEND, error, 1207 0, NULL, false); 1208 1209 out: 1210 /* 1211 * In case of PRUS_NOTREADY, the caller or tcp_usr_ready() is 1212 * responsible for freeing memory. 1213 */ 1214 if (m != NULL && (flags & PRUS_NOTREADY) == 0) 1215 m_freem(m); 1216 1217 /* 1218 * If the request was unsuccessful and we changed flags, 1219 * restore the original flags. 1220 */ 1221 if (error != 0 && restoreflags) { 1222 inp->inp_vflag = vflagsav; 1223 inp->inp_inc.inc_flags = incflagsav; 1224 } 1225 TCPDEBUG2((flags & PRUS_OOB) ? PRU_SENDOOB : 1226 ((flags & PRUS_EOF) ? PRU_SEND_EOF : PRU_SEND)); 1227 TCP_PROBE2(debug__user, tp, (flags & PRUS_OOB) ? PRU_SENDOOB : 1228 ((flags & PRUS_EOF) ? PRU_SEND_EOF : PRU_SEND)); 1229 error = tcp_unlock_or_drop(tp, error); 1230 NET_EPOCH_EXIT(et); 1231 return (error); 1232 } 1233 1234 static int 1235 tcp_usr_ready(struct socket *so, struct mbuf *m, int count) 1236 { 1237 struct epoch_tracker et; 1238 struct inpcb *inp; 1239 struct tcpcb *tp; 1240 int error; 1241 1242 inp = sotoinpcb(so); 1243 INP_WLOCK(inp); 1244 if (inp->inp_flags & INP_DROPPED) { 1245 INP_WUNLOCK(inp); 1246 mb_free_notready(m, count); 1247 return (ECONNRESET); 1248 } 1249 tp = intotcpcb(inp); 1250 1251 SOCKBUF_LOCK(&so->so_snd); 1252 error = sbready(&so->so_snd, m, count); 1253 SOCKBUF_UNLOCK(&so->so_snd); 1254 if (error) { 1255 INP_WUNLOCK(inp); 1256 return (error); 1257 } 1258 NET_EPOCH_ENTER(et); 1259 error = tcp_output_unlock(tp); 1260 NET_EPOCH_EXIT(et); 1261 1262 return (error); 1263 } 1264 1265 /* 1266 * Abort the TCP. Drop the connection abruptly. 1267 */ 1268 static void 1269 tcp_usr_abort(struct socket *so) 1270 { 1271 struct inpcb *inp; 1272 struct tcpcb *tp = NULL; 1273 struct epoch_tracker et; 1274 TCPDEBUG0; 1275 1276 inp = sotoinpcb(so); 1277 KASSERT(inp != NULL, ("tcp_usr_abort: inp == NULL")); 1278 1279 NET_EPOCH_ENTER(et); 1280 INP_WLOCK(inp); 1281 KASSERT(inp->inp_socket != NULL, 1282 ("tcp_usr_abort: inp_socket == NULL")); 1283 1284 /* 1285 * If we still have full TCP state, and we're not dropped, drop. 1286 */ 1287 if (!(inp->inp_flags & INP_DROPPED)) { 1288 tp = intotcpcb(inp); 1289 TCPDEBUG1(); 1290 tp = tcp_drop(tp, ECONNABORTED); 1291 if (tp == NULL) 1292 goto dropped; 1293 TCPDEBUG2(PRU_ABORT); 1294 TCP_PROBE2(debug__user, tp, PRU_ABORT); 1295 } 1296 if (!(inp->inp_flags & INP_DROPPED)) { 1297 soref(so); 1298 inp->inp_flags |= INP_SOCKREF; 1299 } 1300 INP_WUNLOCK(inp); 1301 dropped: 1302 NET_EPOCH_EXIT(et); 1303 } 1304 1305 /* 1306 * TCP socket is closed. Start friendly disconnect. 1307 */ 1308 static void 1309 tcp_usr_close(struct socket *so) 1310 { 1311 struct inpcb *inp; 1312 struct tcpcb *tp = NULL; 1313 struct epoch_tracker et; 1314 TCPDEBUG0; 1315 1316 inp = sotoinpcb(so); 1317 KASSERT(inp != NULL, ("tcp_usr_close: inp == NULL")); 1318 1319 NET_EPOCH_ENTER(et); 1320 INP_WLOCK(inp); 1321 KASSERT(inp->inp_socket != NULL, 1322 ("tcp_usr_close: inp_socket == NULL")); 1323 1324 /* 1325 * If we still have full TCP state, and we're not dropped, initiate 1326 * a disconnect. 1327 */ 1328 if (!(inp->inp_flags & INP_DROPPED)) { 1329 tp = intotcpcb(inp); 1330 tp->t_flags |= TF_CLOSED; 1331 TCPDEBUG1(); 1332 tcp_disconnect(tp); 1333 TCPDEBUG2(PRU_CLOSE); 1334 TCP_PROBE2(debug__user, tp, PRU_CLOSE); 1335 } 1336 if (!(inp->inp_flags & INP_DROPPED)) { 1337 soref(so); 1338 inp->inp_flags |= INP_SOCKREF; 1339 } 1340 INP_WUNLOCK(inp); 1341 NET_EPOCH_EXIT(et); 1342 } 1343 1344 static int 1345 tcp_pru_options_support(struct tcpcb *tp, int flags) 1346 { 1347 /* 1348 * If the specific TCP stack has a pru_options 1349 * specified then it does not always support 1350 * all the PRU_XX options and we must ask it. 1351 * If the function is not specified then all 1352 * of the PRU_XX options are supported. 1353 */ 1354 int ret = 0; 1355 1356 if (tp->t_fb->tfb_pru_options) { 1357 ret = (*tp->t_fb->tfb_pru_options)(tp, flags); 1358 } 1359 return (ret); 1360 } 1361 1362 /* 1363 * Receive out-of-band data. 1364 */ 1365 static int 1366 tcp_usr_rcvoob(struct socket *so, struct mbuf *m, int flags) 1367 { 1368 int error = 0; 1369 struct inpcb *inp; 1370 struct tcpcb *tp = NULL; 1371 1372 TCPDEBUG0; 1373 inp = sotoinpcb(so); 1374 KASSERT(inp != NULL, ("tcp_usr_rcvoob: inp == NULL")); 1375 INP_WLOCK(inp); 1376 if (inp->inp_flags & INP_DROPPED) { 1377 error = ECONNRESET; 1378 goto out; 1379 } 1380 tp = intotcpcb(inp); 1381 error = tcp_pru_options_support(tp, PRUS_OOB); 1382 if (error) { 1383 goto out; 1384 } 1385 TCPDEBUG1(); 1386 if ((so->so_oobmark == 0 && 1387 (so->so_rcv.sb_state & SBS_RCVATMARK) == 0) || 1388 so->so_options & SO_OOBINLINE || 1389 tp->t_oobflags & TCPOOB_HADDATA) { 1390 error = EINVAL; 1391 goto out; 1392 } 1393 if ((tp->t_oobflags & TCPOOB_HAVEDATA) == 0) { 1394 error = EWOULDBLOCK; 1395 goto out; 1396 } 1397 m->m_len = 1; 1398 *mtod(m, caddr_t) = tp->t_iobc; 1399 if ((flags & MSG_PEEK) == 0) 1400 tp->t_oobflags ^= (TCPOOB_HAVEDATA | TCPOOB_HADDATA); 1401 1402 out: 1403 TCPDEBUG2(PRU_RCVOOB); 1404 TCP_PROBE2(debug__user, tp, PRU_RCVOOB); 1405 INP_WUNLOCK(inp); 1406 return (error); 1407 } 1408 1409 #ifdef INET 1410 struct protosw tcp_protosw = { 1411 .pr_type = SOCK_STREAM, 1412 .pr_protocol = IPPROTO_TCP, 1413 .pr_flags = PR_CONNREQUIRED | PR_IMPLOPCL | PR_WANTRCVD | 1414 PR_CAPATTACH, 1415 .pr_ctloutput = tcp_ctloutput, 1416 .pr_abort = tcp_usr_abort, 1417 .pr_accept = tcp_usr_accept, 1418 .pr_attach = tcp_usr_attach, 1419 .pr_bind = tcp_usr_bind, 1420 .pr_connect = tcp_usr_connect, 1421 .pr_control = in_control, 1422 .pr_detach = tcp_usr_detach, 1423 .pr_disconnect = tcp_usr_disconnect, 1424 .pr_listen = tcp_usr_listen, 1425 .pr_peeraddr = in_getpeeraddr, 1426 .pr_rcvd = tcp_usr_rcvd, 1427 .pr_rcvoob = tcp_usr_rcvoob, 1428 .pr_send = tcp_usr_send, 1429 .pr_ready = tcp_usr_ready, 1430 .pr_shutdown = tcp_usr_shutdown, 1431 .pr_sockaddr = in_getsockaddr, 1432 .pr_sosetlabel = in_pcbsosetlabel, 1433 .pr_close = tcp_usr_close, 1434 }; 1435 #endif /* INET */ 1436 1437 #ifdef INET6 1438 struct protosw tcp6_protosw = { 1439 .pr_type = SOCK_STREAM, 1440 .pr_protocol = IPPROTO_TCP, 1441 .pr_flags = PR_CONNREQUIRED | PR_IMPLOPCL |PR_WANTRCVD | 1442 PR_CAPATTACH, 1443 .pr_ctloutput = tcp_ctloutput, 1444 .pr_abort = tcp_usr_abort, 1445 .pr_accept = tcp6_usr_accept, 1446 .pr_attach = tcp_usr_attach, 1447 .pr_bind = tcp6_usr_bind, 1448 .pr_connect = tcp6_usr_connect, 1449 .pr_control = in6_control, 1450 .pr_detach = tcp_usr_detach, 1451 .pr_disconnect = tcp_usr_disconnect, 1452 .pr_listen = tcp6_usr_listen, 1453 .pr_peeraddr = in6_mapped_peeraddr, 1454 .pr_rcvd = tcp_usr_rcvd, 1455 .pr_rcvoob = tcp_usr_rcvoob, 1456 .pr_send = tcp_usr_send, 1457 .pr_ready = tcp_usr_ready, 1458 .pr_shutdown = tcp_usr_shutdown, 1459 .pr_sockaddr = in6_mapped_sockaddr, 1460 .pr_sosetlabel = in_pcbsosetlabel, 1461 .pr_close = tcp_usr_close, 1462 }; 1463 #endif /* INET6 */ 1464 1465 #ifdef INET 1466 /* 1467 * Common subroutine to open a TCP connection to remote host specified 1468 * by struct sockaddr_in in mbuf *nam. Call in_pcbbind to assign a local 1469 * port number if needed. Call in_pcbconnect_setup to do the routing and 1470 * to choose a local host address (interface). If there is an existing 1471 * incarnation of the same connection in TIME-WAIT state and if the remote 1472 * host was sending CC options and if the connection duration was < MSL, then 1473 * truncate the previous TIME-WAIT state and proceed. 1474 * Initialize connection parameters and enter SYN-SENT state. 1475 */ 1476 static int 1477 tcp_connect(struct tcpcb *tp, struct sockaddr *nam, struct thread *td) 1478 { 1479 struct inpcb *inp = tp->t_inpcb, *oinp; 1480 struct socket *so = inp->inp_socket; 1481 struct in_addr laddr; 1482 u_short lport; 1483 int error; 1484 1485 NET_EPOCH_ASSERT(); 1486 INP_WLOCK_ASSERT(inp); 1487 INP_HASH_WLOCK(&V_tcbinfo); 1488 1489 if (V_tcp_require_unique_port && inp->inp_lport == 0) { 1490 error = in_pcbbind(inp, (struct sockaddr *)0, td->td_ucred); 1491 if (error) 1492 goto out; 1493 } 1494 1495 /* 1496 * Cannot simply call in_pcbconnect, because there might be an 1497 * earlier incarnation of this same connection still in 1498 * TIME_WAIT state, creating an ADDRINUSE error. 1499 */ 1500 laddr = inp->inp_laddr; 1501 lport = inp->inp_lport; 1502 error = in_pcbconnect_setup(inp, nam, &laddr.s_addr, &lport, 1503 &inp->inp_faddr.s_addr, &inp->inp_fport, &oinp, td->td_ucred); 1504 if (error && oinp == NULL) 1505 goto out; 1506 if (oinp) { 1507 error = EADDRINUSE; 1508 goto out; 1509 } 1510 /* Handle initial bind if it hadn't been done in advance. */ 1511 if (inp->inp_lport == 0) { 1512 inp->inp_lport = lport; 1513 if (in_pcbinshash(inp) != 0) { 1514 inp->inp_lport = 0; 1515 error = EAGAIN; 1516 goto out; 1517 } 1518 } 1519 inp->inp_laddr = laddr; 1520 in_pcbrehash(inp); 1521 INP_HASH_WUNLOCK(&V_tcbinfo); 1522 1523 /* 1524 * Compute window scaling to request: 1525 * Scale to fit into sweet spot. See tcp_syncache.c. 1526 * XXX: This should move to tcp_output(). 1527 */ 1528 while (tp->request_r_scale < TCP_MAX_WINSHIFT && 1529 (TCP_MAXWIN << tp->request_r_scale) < sb_max) 1530 tp->request_r_scale++; 1531 1532 soisconnecting(so); 1533 TCPSTAT_INC(tcps_connattempt); 1534 tcp_state_change(tp, TCPS_SYN_SENT); 1535 tp->iss = tcp_new_isn(&inp->inp_inc); 1536 if (tp->t_flags & TF_REQ_TSTMP) 1537 tp->ts_offset = tcp_new_ts_offset(&inp->inp_inc); 1538 tcp_sendseqinit(tp); 1539 1540 return 0; 1541 1542 out: 1543 INP_HASH_WUNLOCK(&V_tcbinfo); 1544 return (error); 1545 } 1546 #endif /* INET */ 1547 1548 #ifdef INET6 1549 static int 1550 tcp6_connect(struct tcpcb *tp, struct sockaddr *nam, struct thread *td) 1551 { 1552 struct inpcb *inp = tp->t_inpcb; 1553 int error; 1554 1555 INP_WLOCK_ASSERT(inp); 1556 INP_HASH_WLOCK(&V_tcbinfo); 1557 1558 if (V_tcp_require_unique_port && inp->inp_lport == 0) { 1559 error = in6_pcbbind(inp, (struct sockaddr *)0, td->td_ucred); 1560 if (error) 1561 goto out; 1562 } 1563 error = in6_pcbconnect(inp, nam, td->td_ucred); 1564 if (error != 0) 1565 goto out; 1566 INP_HASH_WUNLOCK(&V_tcbinfo); 1567 1568 /* Compute window scaling to request. */ 1569 while (tp->request_r_scale < TCP_MAX_WINSHIFT && 1570 (TCP_MAXWIN << tp->request_r_scale) < sb_max) 1571 tp->request_r_scale++; 1572 1573 soisconnecting(inp->inp_socket); 1574 TCPSTAT_INC(tcps_connattempt); 1575 tcp_state_change(tp, TCPS_SYN_SENT); 1576 tp->iss = tcp_new_isn(&inp->inp_inc); 1577 if (tp->t_flags & TF_REQ_TSTMP) 1578 tp->ts_offset = tcp_new_ts_offset(&inp->inp_inc); 1579 tcp_sendseqinit(tp); 1580 1581 return 0; 1582 1583 out: 1584 INP_HASH_WUNLOCK(&V_tcbinfo); 1585 return error; 1586 } 1587 #endif /* INET6 */ 1588 1589 /* 1590 * Export TCP internal state information via a struct tcp_info, based on the 1591 * Linux 2.6 API. Not ABI compatible as our constants are mapped differently 1592 * (TCP state machine, etc). We export all information using FreeBSD-native 1593 * constants -- for example, the numeric values for tcpi_state will differ 1594 * from Linux. 1595 */ 1596 static void 1597 tcp_fill_info(struct tcpcb *tp, struct tcp_info *ti) 1598 { 1599 1600 INP_WLOCK_ASSERT(tp->t_inpcb); 1601 bzero(ti, sizeof(*ti)); 1602 1603 ti->tcpi_state = tp->t_state; 1604 if ((tp->t_flags & TF_REQ_TSTMP) && (tp->t_flags & TF_RCVD_TSTMP)) 1605 ti->tcpi_options |= TCPI_OPT_TIMESTAMPS; 1606 if (tp->t_flags & TF_SACK_PERMIT) 1607 ti->tcpi_options |= TCPI_OPT_SACK; 1608 if ((tp->t_flags & TF_REQ_SCALE) && (tp->t_flags & TF_RCVD_SCALE)) { 1609 ti->tcpi_options |= TCPI_OPT_WSCALE; 1610 ti->tcpi_snd_wscale = tp->snd_scale; 1611 ti->tcpi_rcv_wscale = tp->rcv_scale; 1612 } 1613 if (tp->t_flags2 & (TF2_ECN_PERMIT | TF2_ACE_PERMIT)) 1614 ti->tcpi_options |= TCPI_OPT_ECN; 1615 1616 ti->tcpi_rto = tp->t_rxtcur * tick; 1617 ti->tcpi_last_data_recv = ((uint32_t)ticks - tp->t_rcvtime) * tick; 1618 ti->tcpi_rtt = ((u_int64_t)tp->t_srtt * tick) >> TCP_RTT_SHIFT; 1619 ti->tcpi_rttvar = ((u_int64_t)tp->t_rttvar * tick) >> TCP_RTTVAR_SHIFT; 1620 1621 ti->tcpi_snd_ssthresh = tp->snd_ssthresh; 1622 ti->tcpi_snd_cwnd = tp->snd_cwnd; 1623 1624 /* 1625 * FreeBSD-specific extension fields for tcp_info. 1626 */ 1627 ti->tcpi_rcv_space = tp->rcv_wnd; 1628 ti->tcpi_rcv_nxt = tp->rcv_nxt; 1629 ti->tcpi_snd_wnd = tp->snd_wnd; 1630 ti->tcpi_snd_bwnd = 0; /* Unused, kept for compat. */ 1631 ti->tcpi_snd_nxt = tp->snd_nxt; 1632 ti->tcpi_snd_mss = tp->t_maxseg; 1633 ti->tcpi_rcv_mss = tp->t_maxseg; 1634 ti->tcpi_snd_rexmitpack = tp->t_sndrexmitpack; 1635 ti->tcpi_rcv_ooopack = tp->t_rcvoopack; 1636 ti->tcpi_snd_zerowin = tp->t_sndzerowin; 1637 #ifdef TCP_OFFLOAD 1638 if (tp->t_flags & TF_TOE) { 1639 ti->tcpi_options |= TCPI_OPT_TOE; 1640 tcp_offload_tcp_info(tp, ti); 1641 } 1642 #endif 1643 } 1644 1645 /* 1646 * tcp_ctloutput() must drop the inpcb lock before performing copyin on 1647 * socket option arguments. When it re-acquires the lock after the copy, it 1648 * has to revalidate that the connection is still valid for the socket 1649 * option. 1650 */ 1651 #define INP_WLOCK_RECHECK_CLEANUP(inp, cleanup) do { \ 1652 INP_WLOCK(inp); \ 1653 if (inp->inp_flags & INP_DROPPED) { \ 1654 INP_WUNLOCK(inp); \ 1655 cleanup; \ 1656 return (ECONNRESET); \ 1657 } \ 1658 tp = intotcpcb(inp); \ 1659 } while(0) 1660 #define INP_WLOCK_RECHECK(inp) INP_WLOCK_RECHECK_CLEANUP((inp), /* noop */) 1661 1662 int 1663 tcp_ctloutput_set(struct inpcb *inp, struct sockopt *sopt) 1664 { 1665 struct socket *so = inp->inp_socket; 1666 struct tcpcb *tp = intotcpcb(inp); 1667 int error = 0; 1668 1669 MPASS(sopt->sopt_dir == SOPT_SET); 1670 INP_WLOCK_ASSERT(inp); 1671 KASSERT((inp->inp_flags & INP_DROPPED) == 0, 1672 ("inp_flags == %x", inp->inp_flags)); 1673 KASSERT(so != NULL, ("inp_socket == NULL")); 1674 1675 if (sopt->sopt_level != IPPROTO_TCP) { 1676 INP_WUNLOCK(inp); 1677 #ifdef INET6 1678 if (inp->inp_vflag & INP_IPV6PROTO) 1679 error = ip6_ctloutput(so, sopt); 1680 #endif 1681 #if defined(INET6) && defined(INET) 1682 else 1683 #endif 1684 #ifdef INET 1685 error = ip_ctloutput(so, sopt); 1686 #endif 1687 /* 1688 * When an IP-level socket option affects TCP, pass control 1689 * down to stack tfb_tcp_ctloutput, otherwise return what 1690 * IP level returned. 1691 */ 1692 switch (sopt->sopt_level) { 1693 #ifdef INET6 1694 case IPPROTO_IPV6: 1695 if ((inp->inp_vflag & INP_IPV6PROTO) == 0) 1696 return (error); 1697 switch (sopt->sopt_name) { 1698 case IPV6_TCLASS: 1699 /* Notify tcp stacks that care (e.g. RACK). */ 1700 break; 1701 case IPV6_USE_MIN_MTU: 1702 /* Update t_maxseg accordingly. */ 1703 break; 1704 default: 1705 return (error); 1706 } 1707 break; 1708 #endif 1709 #ifdef INET 1710 case IPPROTO_IP: 1711 switch (sopt->sopt_name) { 1712 case IP_TOS: 1713 inp->inp_ip_tos &= ~IPTOS_ECN_MASK; 1714 break; 1715 case IP_TTL: 1716 /* Notify tcp stacks that care (e.g. RACK). */ 1717 break; 1718 default: 1719 return (error); 1720 } 1721 break; 1722 #endif 1723 default: 1724 return (error); 1725 } 1726 INP_WLOCK(inp); 1727 if (inp->inp_flags & INP_DROPPED) { 1728 INP_WUNLOCK(inp); 1729 return (ECONNRESET); 1730 } 1731 } else if (sopt->sopt_name == TCP_FUNCTION_BLK) { 1732 /* 1733 * Protect the TCP option TCP_FUNCTION_BLK so 1734 * that a sub-function can *never* overwrite this. 1735 */ 1736 struct tcp_function_set fsn; 1737 struct tcp_function_block *blk; 1738 1739 INP_WUNLOCK(inp); 1740 error = sooptcopyin(sopt, &fsn, sizeof fsn, sizeof fsn); 1741 if (error) 1742 return (error); 1743 1744 INP_WLOCK(inp); 1745 if (inp->inp_flags & INP_DROPPED) { 1746 INP_WUNLOCK(inp); 1747 return (ECONNRESET); 1748 } 1749 tp = intotcpcb(inp); 1750 1751 blk = find_and_ref_tcp_functions(&fsn); 1752 if (blk == NULL) { 1753 INP_WUNLOCK(inp); 1754 return (ENOENT); 1755 } 1756 if (tp->t_fb == blk) { 1757 /* You already have this */ 1758 refcount_release(&blk->tfb_refcnt); 1759 INP_WUNLOCK(inp); 1760 return (0); 1761 } 1762 if (tp->t_state != TCPS_CLOSED) { 1763 /* 1764 * The user has advanced the state 1765 * past the initial point, we may not 1766 * be able to switch. 1767 */ 1768 if (blk->tfb_tcp_handoff_ok != NULL) { 1769 /* 1770 * Does the stack provide a 1771 * query mechanism, if so it may 1772 * still be possible? 1773 */ 1774 error = (*blk->tfb_tcp_handoff_ok)(tp); 1775 } else 1776 error = EINVAL; 1777 if (error) { 1778 refcount_release(&blk->tfb_refcnt); 1779 INP_WUNLOCK(inp); 1780 return(error); 1781 } 1782 } 1783 if (blk->tfb_flags & TCP_FUNC_BEING_REMOVED) { 1784 refcount_release(&blk->tfb_refcnt); 1785 INP_WUNLOCK(inp); 1786 return (ENOENT); 1787 } 1788 /* 1789 * Release the old refcnt, the 1790 * lookup acquired a ref on the 1791 * new one already. 1792 */ 1793 if (tp->t_fb->tfb_tcp_fb_fini) { 1794 struct epoch_tracker et; 1795 /* 1796 * Tell the stack to cleanup with 0 i.e. 1797 * the tcb is not going away. 1798 */ 1799 NET_EPOCH_ENTER(et); 1800 (*tp->t_fb->tfb_tcp_fb_fini)(tp, 0); 1801 NET_EPOCH_EXIT(et); 1802 } 1803 #ifdef TCPHPTS 1804 /* Assure that we are not on any hpts */ 1805 tcp_hpts_remove(tp->t_inpcb); 1806 #endif 1807 if (blk->tfb_tcp_fb_init) { 1808 error = (*blk->tfb_tcp_fb_init)(tp); 1809 if (error) { 1810 refcount_release(&blk->tfb_refcnt); 1811 if (tp->t_fb->tfb_tcp_fb_init) { 1812 if((*tp->t_fb->tfb_tcp_fb_init)(tp) != 0) { 1813 /* Fall back failed, drop the connection */ 1814 INP_WUNLOCK(inp); 1815 soabort(so); 1816 return (error); 1817 } 1818 } 1819 goto err_out; 1820 } 1821 } 1822 refcount_release(&tp->t_fb->tfb_refcnt); 1823 tp->t_fb = blk; 1824 #ifdef TCP_OFFLOAD 1825 if (tp->t_flags & TF_TOE) { 1826 tcp_offload_ctloutput(tp, sopt->sopt_dir, 1827 sopt->sopt_name); 1828 } 1829 #endif 1830 err_out: 1831 INP_WUNLOCK(inp); 1832 return (error); 1833 } 1834 1835 /* Pass in the INP locked, callee must unlock it. */ 1836 return (tp->t_fb->tfb_tcp_ctloutput(inp, sopt)); 1837 } 1838 1839 static int 1840 tcp_ctloutput_get(struct inpcb *inp, struct sockopt *sopt) 1841 { 1842 struct socket *so = inp->inp_socket; 1843 struct tcpcb *tp = intotcpcb(inp); 1844 int error = 0; 1845 1846 MPASS(sopt->sopt_dir == SOPT_GET); 1847 INP_WLOCK_ASSERT(inp); 1848 KASSERT((inp->inp_flags & INP_DROPPED) == 0, 1849 ("inp_flags == %x", inp->inp_flags)); 1850 KASSERT(so != NULL, ("inp_socket == NULL")); 1851 1852 if (sopt->sopt_level != IPPROTO_TCP) { 1853 INP_WUNLOCK(inp); 1854 #ifdef INET6 1855 if (inp->inp_vflag & INP_IPV6PROTO) 1856 error = ip6_ctloutput(so, sopt); 1857 #endif /* INET6 */ 1858 #if defined(INET6) && defined(INET) 1859 else 1860 #endif 1861 #ifdef INET 1862 error = ip_ctloutput(so, sopt); 1863 #endif 1864 return (error); 1865 } 1866 if (((sopt->sopt_name == TCP_FUNCTION_BLK) || 1867 (sopt->sopt_name == TCP_FUNCTION_ALIAS))) { 1868 struct tcp_function_set fsn; 1869 1870 if (sopt->sopt_name == TCP_FUNCTION_ALIAS) { 1871 memset(&fsn, 0, sizeof(fsn)); 1872 find_tcp_function_alias(tp->t_fb, &fsn); 1873 } else { 1874 strncpy(fsn.function_set_name, 1875 tp->t_fb->tfb_tcp_block_name, 1876 TCP_FUNCTION_NAME_LEN_MAX); 1877 fsn.function_set_name[TCP_FUNCTION_NAME_LEN_MAX - 1] = '\0'; 1878 } 1879 fsn.pcbcnt = tp->t_fb->tfb_refcnt; 1880 INP_WUNLOCK(inp); 1881 error = sooptcopyout(sopt, &fsn, sizeof fsn); 1882 return (error); 1883 } 1884 1885 /* Pass in the INP locked, callee must unlock it. */ 1886 return (tp->t_fb->tfb_tcp_ctloutput(inp, sopt)); 1887 } 1888 1889 int 1890 tcp_ctloutput(struct socket *so, struct sockopt *sopt) 1891 { 1892 struct inpcb *inp; 1893 1894 inp = sotoinpcb(so); 1895 KASSERT(inp != NULL, ("tcp_ctloutput: inp == NULL")); 1896 1897 INP_WLOCK(inp); 1898 if (inp->inp_flags & INP_DROPPED) { 1899 INP_WUNLOCK(inp); 1900 return (ECONNRESET); 1901 } 1902 if (sopt->sopt_dir == SOPT_SET) 1903 return (tcp_ctloutput_set(inp, sopt)); 1904 else if (sopt->sopt_dir == SOPT_GET) 1905 return (tcp_ctloutput_get(inp, sopt)); 1906 else 1907 panic("%s: sopt_dir $%d", __func__, sopt->sopt_dir); 1908 } 1909 1910 /* 1911 * If this assert becomes untrue, we need to change the size of the buf 1912 * variable in tcp_default_ctloutput(). 1913 */ 1914 #ifdef CTASSERT 1915 CTASSERT(TCP_CA_NAME_MAX <= TCP_LOG_ID_LEN); 1916 CTASSERT(TCP_LOG_REASON_LEN <= TCP_LOG_ID_LEN); 1917 #endif 1918 1919 #ifdef KERN_TLS 1920 static int 1921 copyin_tls_enable(struct sockopt *sopt, struct tls_enable *tls) 1922 { 1923 struct tls_enable_v0 tls_v0; 1924 int error; 1925 1926 if (sopt->sopt_valsize == sizeof(tls_v0)) { 1927 error = sooptcopyin(sopt, &tls_v0, sizeof(tls_v0), 1928 sizeof(tls_v0)); 1929 if (error) 1930 return (error); 1931 memset(tls, 0, sizeof(*tls)); 1932 tls->cipher_key = tls_v0.cipher_key; 1933 tls->iv = tls_v0.iv; 1934 tls->auth_key = tls_v0.auth_key; 1935 tls->cipher_algorithm = tls_v0.cipher_algorithm; 1936 tls->cipher_key_len = tls_v0.cipher_key_len; 1937 tls->iv_len = tls_v0.iv_len; 1938 tls->auth_algorithm = tls_v0.auth_algorithm; 1939 tls->auth_key_len = tls_v0.auth_key_len; 1940 tls->flags = tls_v0.flags; 1941 tls->tls_vmajor = tls_v0.tls_vmajor; 1942 tls->tls_vminor = tls_v0.tls_vminor; 1943 return (0); 1944 } 1945 1946 return (sooptcopyin(sopt, tls, sizeof(*tls), sizeof(*tls))); 1947 } 1948 #endif 1949 1950 extern struct cc_algo newreno_cc_algo; 1951 1952 static int 1953 tcp_set_cc_mod(struct inpcb *inp, struct sockopt *sopt) 1954 { 1955 struct cc_algo *algo; 1956 void *ptr = NULL; 1957 struct tcpcb *tp; 1958 struct cc_var cc_mem; 1959 char buf[TCP_CA_NAME_MAX]; 1960 size_t mem_sz; 1961 int error; 1962 1963 INP_WUNLOCK(inp); 1964 error = sooptcopyin(sopt, buf, TCP_CA_NAME_MAX - 1, 1); 1965 if (error) 1966 return(error); 1967 buf[sopt->sopt_valsize] = '\0'; 1968 CC_LIST_RLOCK(); 1969 STAILQ_FOREACH(algo, &cc_list, entries) { 1970 if (strncmp(buf, algo->name, 1971 TCP_CA_NAME_MAX) == 0) { 1972 if (algo->flags & CC_MODULE_BEING_REMOVED) { 1973 /* We can't "see" modules being unloaded */ 1974 continue; 1975 } 1976 break; 1977 } 1978 } 1979 if (algo == NULL) { 1980 CC_LIST_RUNLOCK(); 1981 return(ESRCH); 1982 } 1983 /* 1984 * With a reference the algorithm cannot be removed 1985 * so we hold a reference through the change process. 1986 */ 1987 cc_refer(algo); 1988 CC_LIST_RUNLOCK(); 1989 if (algo->cb_init != NULL) { 1990 /* We can now pre-get the memory for the CC */ 1991 mem_sz = (*algo->cc_data_sz)(); 1992 if (mem_sz == 0) { 1993 goto no_mem_needed; 1994 } 1995 ptr = malloc(mem_sz, M_CC_MEM, M_WAITOK); 1996 } else { 1997 no_mem_needed: 1998 mem_sz = 0; 1999 ptr = NULL; 2000 } 2001 /* 2002 * Make sure its all clean and zero and also get 2003 * back the inplock. 2004 */ 2005 memset(&cc_mem, 0, sizeof(cc_mem)); 2006 INP_WLOCK(inp); 2007 if (inp->inp_flags & INP_DROPPED) { 2008 INP_WUNLOCK(inp); 2009 if (ptr) 2010 free(ptr, M_CC_MEM); 2011 /* Release our temp reference */ 2012 CC_LIST_RLOCK(); 2013 cc_release(algo); 2014 CC_LIST_RUNLOCK(); 2015 return (ECONNRESET); 2016 } 2017 tp = intotcpcb(inp); 2018 if (ptr != NULL) 2019 memset(ptr, 0, mem_sz); 2020 cc_mem.ccvc.tcp = tp; 2021 /* 2022 * We once again hold a write lock over the tcb so it's 2023 * safe to do these things without ordering concerns. 2024 * Note here we init into stack memory. 2025 */ 2026 if (algo->cb_init != NULL) 2027 error = algo->cb_init(&cc_mem, ptr); 2028 else 2029 error = 0; 2030 /* 2031 * The CC algorithms, when given their memory 2032 * should not fail we could in theory have a 2033 * KASSERT here. 2034 */ 2035 if (error == 0) { 2036 /* 2037 * Touchdown, lets go ahead and move the 2038 * connection to the new CC module by 2039 * copying in the cc_mem after we call 2040 * the old ones cleanup (if any). 2041 */ 2042 if (CC_ALGO(tp)->cb_destroy != NULL) 2043 CC_ALGO(tp)->cb_destroy(tp->ccv); 2044 /* Detach the old CC from the tcpcb */ 2045 cc_detach(tp); 2046 /* Copy in our temp memory that was inited */ 2047 memcpy(tp->ccv, &cc_mem, sizeof(struct cc_var)); 2048 /* Now attach the new, which takes a reference */ 2049 cc_attach(tp, algo); 2050 /* Ok now are we where we have gotten past any conn_init? */ 2051 if (TCPS_HAVEESTABLISHED(tp->t_state) && (CC_ALGO(tp)->conn_init != NULL)) { 2052 /* Yep run the connection init for the new CC */ 2053 CC_ALGO(tp)->conn_init(tp->ccv); 2054 } 2055 } else if (ptr) 2056 free(ptr, M_CC_MEM); 2057 INP_WUNLOCK(inp); 2058 /* Now lets release our temp reference */ 2059 CC_LIST_RLOCK(); 2060 cc_release(algo); 2061 CC_LIST_RUNLOCK(); 2062 return (error); 2063 } 2064 2065 int 2066 tcp_default_ctloutput(struct inpcb *inp, struct sockopt *sopt) 2067 { 2068 struct tcpcb *tp = intotcpcb(inp); 2069 int error, opt, optval; 2070 u_int ui; 2071 struct tcp_info ti; 2072 #ifdef KERN_TLS 2073 struct tls_enable tls; 2074 struct socket *so = inp->inp_socket; 2075 #endif 2076 char *pbuf, buf[TCP_LOG_ID_LEN]; 2077 #ifdef STATS 2078 struct statsblob *sbp; 2079 #endif 2080 size_t len; 2081 2082 INP_WLOCK_ASSERT(inp); 2083 KASSERT((inp->inp_flags & INP_DROPPED) == 0, 2084 ("inp_flags == %x", inp->inp_flags)); 2085 KASSERT(inp->inp_socket != NULL, ("inp_socket == NULL")); 2086 2087 switch (sopt->sopt_level) { 2088 #ifdef INET6 2089 case IPPROTO_IPV6: 2090 MPASS(inp->inp_vflag & INP_IPV6PROTO); 2091 switch (sopt->sopt_name) { 2092 case IPV6_USE_MIN_MTU: 2093 tcp6_use_min_mtu(tp); 2094 /* FALLTHROUGH */ 2095 } 2096 INP_WUNLOCK(inp); 2097 return (0); 2098 #endif 2099 #ifdef INET 2100 case IPPROTO_IP: 2101 INP_WUNLOCK(inp); 2102 return (0); 2103 #endif 2104 } 2105 2106 /* 2107 * For TCP_CCALGOOPT forward the control to CC module, for both 2108 * SOPT_SET and SOPT_GET. 2109 */ 2110 switch (sopt->sopt_name) { 2111 case TCP_CCALGOOPT: 2112 INP_WUNLOCK(inp); 2113 if (sopt->sopt_valsize > CC_ALGOOPT_LIMIT) 2114 return (EINVAL); 2115 pbuf = malloc(sopt->sopt_valsize, M_TEMP, M_WAITOK | M_ZERO); 2116 error = sooptcopyin(sopt, pbuf, sopt->sopt_valsize, 2117 sopt->sopt_valsize); 2118 if (error) { 2119 free(pbuf, M_TEMP); 2120 return (error); 2121 } 2122 INP_WLOCK_RECHECK_CLEANUP(inp, free(pbuf, M_TEMP)); 2123 if (CC_ALGO(tp)->ctl_output != NULL) 2124 error = CC_ALGO(tp)->ctl_output(tp->ccv, sopt, pbuf); 2125 else 2126 error = ENOENT; 2127 INP_WUNLOCK(inp); 2128 if (error == 0 && sopt->sopt_dir == SOPT_GET) 2129 error = sooptcopyout(sopt, pbuf, sopt->sopt_valsize); 2130 free(pbuf, M_TEMP); 2131 return (error); 2132 } 2133 2134 switch (sopt->sopt_dir) { 2135 case SOPT_SET: 2136 switch (sopt->sopt_name) { 2137 #if defined(IPSEC_SUPPORT) || defined(TCP_SIGNATURE) 2138 case TCP_MD5SIG: 2139 INP_WUNLOCK(inp); 2140 if (!TCPMD5_ENABLED()) 2141 return (ENOPROTOOPT); 2142 error = TCPMD5_PCBCTL(inp, sopt); 2143 if (error) 2144 return (error); 2145 INP_WLOCK_RECHECK(inp); 2146 goto unlock_and_done; 2147 #endif /* IPSEC */ 2148 2149 case TCP_NODELAY: 2150 case TCP_NOOPT: 2151 case TCP_LRD: 2152 INP_WUNLOCK(inp); 2153 error = sooptcopyin(sopt, &optval, sizeof optval, 2154 sizeof optval); 2155 if (error) 2156 return (error); 2157 2158 INP_WLOCK_RECHECK(inp); 2159 switch (sopt->sopt_name) { 2160 case TCP_NODELAY: 2161 opt = TF_NODELAY; 2162 break; 2163 case TCP_NOOPT: 2164 opt = TF_NOOPT; 2165 break; 2166 case TCP_LRD: 2167 opt = TF_LRD; 2168 break; 2169 default: 2170 opt = 0; /* dead code to fool gcc */ 2171 break; 2172 } 2173 2174 if (optval) 2175 tp->t_flags |= opt; 2176 else 2177 tp->t_flags &= ~opt; 2178 unlock_and_done: 2179 #ifdef TCP_OFFLOAD 2180 if (tp->t_flags & TF_TOE) { 2181 tcp_offload_ctloutput(tp, sopt->sopt_dir, 2182 sopt->sopt_name); 2183 } 2184 #endif 2185 INP_WUNLOCK(inp); 2186 break; 2187 2188 case TCP_NOPUSH: 2189 INP_WUNLOCK(inp); 2190 error = sooptcopyin(sopt, &optval, sizeof optval, 2191 sizeof optval); 2192 if (error) 2193 return (error); 2194 2195 INP_WLOCK_RECHECK(inp); 2196 if (optval) 2197 tp->t_flags |= TF_NOPUSH; 2198 else if (tp->t_flags & TF_NOPUSH) { 2199 tp->t_flags &= ~TF_NOPUSH; 2200 if (TCPS_HAVEESTABLISHED(tp->t_state)) { 2201 struct epoch_tracker et; 2202 2203 NET_EPOCH_ENTER(et); 2204 error = tcp_output_nodrop(tp); 2205 NET_EPOCH_EXIT(et); 2206 } 2207 } 2208 goto unlock_and_done; 2209 2210 case TCP_REMOTE_UDP_ENCAPS_PORT: 2211 INP_WUNLOCK(inp); 2212 error = sooptcopyin(sopt, &optval, sizeof optval, 2213 sizeof optval); 2214 if (error) 2215 return (error); 2216 if ((optval < TCP_TUNNELING_PORT_MIN) || 2217 (optval > TCP_TUNNELING_PORT_MAX)) { 2218 /* Its got to be in range */ 2219 return (EINVAL); 2220 } 2221 if ((V_tcp_udp_tunneling_port == 0) && (optval != 0)) { 2222 /* You have to have enabled a UDP tunneling port first */ 2223 return (EINVAL); 2224 } 2225 INP_WLOCK_RECHECK(inp); 2226 if (tp->t_state != TCPS_CLOSED) { 2227 /* You can't change after you are connected */ 2228 error = EINVAL; 2229 } else { 2230 /* Ok we are all good set the port */ 2231 tp->t_port = htons(optval); 2232 } 2233 goto unlock_and_done; 2234 2235 case TCP_MAXSEG: 2236 INP_WUNLOCK(inp); 2237 error = sooptcopyin(sopt, &optval, sizeof optval, 2238 sizeof optval); 2239 if (error) 2240 return (error); 2241 2242 INP_WLOCK_RECHECK(inp); 2243 if (optval > 0 && optval <= tp->t_maxseg && 2244 optval + 40 >= V_tcp_minmss) 2245 tp->t_maxseg = optval; 2246 else 2247 error = EINVAL; 2248 goto unlock_and_done; 2249 2250 case TCP_INFO: 2251 INP_WUNLOCK(inp); 2252 error = EINVAL; 2253 break; 2254 2255 case TCP_STATS: 2256 INP_WUNLOCK(inp); 2257 #ifdef STATS 2258 error = sooptcopyin(sopt, &optval, sizeof optval, 2259 sizeof optval); 2260 if (error) 2261 return (error); 2262 2263 if (optval > 0) 2264 sbp = stats_blob_alloc( 2265 V_tcp_perconn_stats_dflt_tpl, 0); 2266 else 2267 sbp = NULL; 2268 2269 INP_WLOCK_RECHECK(inp); 2270 if ((tp->t_stats != NULL && sbp == NULL) || 2271 (tp->t_stats == NULL && sbp != NULL)) { 2272 struct statsblob *t = tp->t_stats; 2273 tp->t_stats = sbp; 2274 sbp = t; 2275 } 2276 INP_WUNLOCK(inp); 2277 2278 stats_blob_destroy(sbp); 2279 #else 2280 return (EOPNOTSUPP); 2281 #endif /* !STATS */ 2282 break; 2283 2284 case TCP_CONGESTION: 2285 error = tcp_set_cc_mod(inp, sopt); 2286 break; 2287 2288 case TCP_REUSPORT_LB_NUMA: 2289 INP_WUNLOCK(inp); 2290 error = sooptcopyin(sopt, &optval, sizeof(optval), 2291 sizeof(optval)); 2292 INP_WLOCK_RECHECK(inp); 2293 if (!error) 2294 error = in_pcblbgroup_numa(inp, optval); 2295 INP_WUNLOCK(inp); 2296 break; 2297 2298 #ifdef KERN_TLS 2299 case TCP_TXTLS_ENABLE: 2300 INP_WUNLOCK(inp); 2301 error = copyin_tls_enable(sopt, &tls); 2302 if (error) 2303 break; 2304 error = ktls_enable_tx(so, &tls); 2305 break; 2306 case TCP_TXTLS_MODE: 2307 INP_WUNLOCK(inp); 2308 error = sooptcopyin(sopt, &ui, sizeof(ui), sizeof(ui)); 2309 if (error) 2310 return (error); 2311 2312 INP_WLOCK_RECHECK(inp); 2313 error = ktls_set_tx_mode(so, ui); 2314 INP_WUNLOCK(inp); 2315 break; 2316 case TCP_RXTLS_ENABLE: 2317 INP_WUNLOCK(inp); 2318 error = sooptcopyin(sopt, &tls, sizeof(tls), 2319 sizeof(tls)); 2320 if (error) 2321 break; 2322 error = ktls_enable_rx(so, &tls); 2323 break; 2324 #endif 2325 case TCP_MAXUNACKTIME: 2326 case TCP_KEEPIDLE: 2327 case TCP_KEEPINTVL: 2328 case TCP_KEEPINIT: 2329 INP_WUNLOCK(inp); 2330 error = sooptcopyin(sopt, &ui, sizeof(ui), sizeof(ui)); 2331 if (error) 2332 return (error); 2333 2334 if (ui > (UINT_MAX / hz)) { 2335 error = EINVAL; 2336 break; 2337 } 2338 ui *= hz; 2339 2340 INP_WLOCK_RECHECK(inp); 2341 switch (sopt->sopt_name) { 2342 case TCP_MAXUNACKTIME: 2343 tp->t_maxunacktime = ui; 2344 break; 2345 2346 case TCP_KEEPIDLE: 2347 tp->t_keepidle = ui; 2348 /* 2349 * XXX: better check current remaining 2350 * timeout and "merge" it with new value. 2351 */ 2352 if ((tp->t_state > TCPS_LISTEN) && 2353 (tp->t_state <= TCPS_CLOSING)) 2354 tcp_timer_activate(tp, TT_KEEP, 2355 TP_KEEPIDLE(tp)); 2356 break; 2357 case TCP_KEEPINTVL: 2358 tp->t_keepintvl = ui; 2359 if ((tp->t_state == TCPS_FIN_WAIT_2) && 2360 (TP_MAXIDLE(tp) > 0)) 2361 tcp_timer_activate(tp, TT_2MSL, 2362 TP_MAXIDLE(tp)); 2363 break; 2364 case TCP_KEEPINIT: 2365 tp->t_keepinit = ui; 2366 if (tp->t_state == TCPS_SYN_RECEIVED || 2367 tp->t_state == TCPS_SYN_SENT) 2368 tcp_timer_activate(tp, TT_KEEP, 2369 TP_KEEPINIT(tp)); 2370 break; 2371 } 2372 goto unlock_and_done; 2373 2374 case TCP_KEEPCNT: 2375 INP_WUNLOCK(inp); 2376 error = sooptcopyin(sopt, &ui, sizeof(ui), sizeof(ui)); 2377 if (error) 2378 return (error); 2379 2380 INP_WLOCK_RECHECK(inp); 2381 tp->t_keepcnt = ui; 2382 if ((tp->t_state == TCPS_FIN_WAIT_2) && 2383 (TP_MAXIDLE(tp) > 0)) 2384 tcp_timer_activate(tp, TT_2MSL, 2385 TP_MAXIDLE(tp)); 2386 goto unlock_and_done; 2387 2388 #ifdef TCPPCAP 2389 case TCP_PCAP_OUT: 2390 case TCP_PCAP_IN: 2391 INP_WUNLOCK(inp); 2392 error = sooptcopyin(sopt, &optval, sizeof optval, 2393 sizeof optval); 2394 if (error) 2395 return (error); 2396 2397 INP_WLOCK_RECHECK(inp); 2398 if (optval >= 0) 2399 tcp_pcap_set_sock_max(TCP_PCAP_OUT ? 2400 &(tp->t_outpkts) : &(tp->t_inpkts), 2401 optval); 2402 else 2403 error = EINVAL; 2404 goto unlock_and_done; 2405 #endif 2406 2407 case TCP_FASTOPEN: { 2408 struct tcp_fastopen tfo_optval; 2409 2410 INP_WUNLOCK(inp); 2411 if (!V_tcp_fastopen_client_enable && 2412 !V_tcp_fastopen_server_enable) 2413 return (EPERM); 2414 2415 error = sooptcopyin(sopt, &tfo_optval, 2416 sizeof(tfo_optval), sizeof(int)); 2417 if (error) 2418 return (error); 2419 2420 INP_WLOCK_RECHECK(inp); 2421 if ((tp->t_state != TCPS_CLOSED) && 2422 (tp->t_state != TCPS_LISTEN)) { 2423 error = EINVAL; 2424 goto unlock_and_done; 2425 } 2426 if (tfo_optval.enable) { 2427 if (tp->t_state == TCPS_LISTEN) { 2428 if (!V_tcp_fastopen_server_enable) { 2429 error = EPERM; 2430 goto unlock_and_done; 2431 } 2432 2433 if (tp->t_tfo_pending == NULL) 2434 tp->t_tfo_pending = 2435 tcp_fastopen_alloc_counter(); 2436 } else { 2437 /* 2438 * If a pre-shared key was provided, 2439 * stash it in the client cookie 2440 * field of the tcpcb for use during 2441 * connect. 2442 */ 2443 if (sopt->sopt_valsize == 2444 sizeof(tfo_optval)) { 2445 memcpy(tp->t_tfo_cookie.client, 2446 tfo_optval.psk, 2447 TCP_FASTOPEN_PSK_LEN); 2448 tp->t_tfo_client_cookie_len = 2449 TCP_FASTOPEN_PSK_LEN; 2450 } 2451 } 2452 tp->t_flags |= TF_FASTOPEN; 2453 } else 2454 tp->t_flags &= ~TF_FASTOPEN; 2455 goto unlock_and_done; 2456 } 2457 2458 #ifdef TCP_BLACKBOX 2459 case TCP_LOG: 2460 INP_WUNLOCK(inp); 2461 error = sooptcopyin(sopt, &optval, sizeof optval, 2462 sizeof optval); 2463 if (error) 2464 return (error); 2465 2466 INP_WLOCK_RECHECK(inp); 2467 error = tcp_log_state_change(tp, optval); 2468 goto unlock_and_done; 2469 2470 case TCP_LOGBUF: 2471 INP_WUNLOCK(inp); 2472 error = EINVAL; 2473 break; 2474 2475 case TCP_LOGID: 2476 INP_WUNLOCK(inp); 2477 error = sooptcopyin(sopt, buf, TCP_LOG_ID_LEN - 1, 0); 2478 if (error) 2479 break; 2480 buf[sopt->sopt_valsize] = '\0'; 2481 INP_WLOCK_RECHECK(inp); 2482 error = tcp_log_set_id(tp, buf); 2483 /* tcp_log_set_id() unlocks the INP. */ 2484 break; 2485 2486 case TCP_LOGDUMP: 2487 case TCP_LOGDUMPID: 2488 INP_WUNLOCK(inp); 2489 error = 2490 sooptcopyin(sopt, buf, TCP_LOG_REASON_LEN - 1, 0); 2491 if (error) 2492 break; 2493 buf[sopt->sopt_valsize] = '\0'; 2494 INP_WLOCK_RECHECK(inp); 2495 if (sopt->sopt_name == TCP_LOGDUMP) { 2496 error = tcp_log_dump_tp_logbuf(tp, buf, 2497 M_WAITOK, true); 2498 INP_WUNLOCK(inp); 2499 } else { 2500 tcp_log_dump_tp_bucket_logbufs(tp, buf); 2501 /* 2502 * tcp_log_dump_tp_bucket_logbufs() drops the 2503 * INP lock. 2504 */ 2505 } 2506 break; 2507 #endif 2508 2509 default: 2510 INP_WUNLOCK(inp); 2511 error = ENOPROTOOPT; 2512 break; 2513 } 2514 break; 2515 2516 case SOPT_GET: 2517 tp = intotcpcb(inp); 2518 switch (sopt->sopt_name) { 2519 #if defined(IPSEC_SUPPORT) || defined(TCP_SIGNATURE) 2520 case TCP_MD5SIG: 2521 INP_WUNLOCK(inp); 2522 if (!TCPMD5_ENABLED()) 2523 return (ENOPROTOOPT); 2524 error = TCPMD5_PCBCTL(inp, sopt); 2525 break; 2526 #endif 2527 2528 case TCP_NODELAY: 2529 optval = tp->t_flags & TF_NODELAY; 2530 INP_WUNLOCK(inp); 2531 error = sooptcopyout(sopt, &optval, sizeof optval); 2532 break; 2533 case TCP_MAXSEG: 2534 optval = tp->t_maxseg; 2535 INP_WUNLOCK(inp); 2536 error = sooptcopyout(sopt, &optval, sizeof optval); 2537 break; 2538 case TCP_REMOTE_UDP_ENCAPS_PORT: 2539 optval = ntohs(tp->t_port); 2540 INP_WUNLOCK(inp); 2541 error = sooptcopyout(sopt, &optval, sizeof optval); 2542 break; 2543 case TCP_NOOPT: 2544 optval = tp->t_flags & TF_NOOPT; 2545 INP_WUNLOCK(inp); 2546 error = sooptcopyout(sopt, &optval, sizeof optval); 2547 break; 2548 case TCP_NOPUSH: 2549 optval = tp->t_flags & TF_NOPUSH; 2550 INP_WUNLOCK(inp); 2551 error = sooptcopyout(sopt, &optval, sizeof optval); 2552 break; 2553 case TCP_INFO: 2554 tcp_fill_info(tp, &ti); 2555 INP_WUNLOCK(inp); 2556 error = sooptcopyout(sopt, &ti, sizeof ti); 2557 break; 2558 case TCP_STATS: 2559 { 2560 #ifdef STATS 2561 int nheld; 2562 TYPEOF_MEMBER(struct statsblob, flags) sbflags = 0; 2563 2564 error = 0; 2565 socklen_t outsbsz = sopt->sopt_valsize; 2566 if (tp->t_stats == NULL) 2567 error = ENOENT; 2568 else if (outsbsz >= tp->t_stats->cursz) 2569 outsbsz = tp->t_stats->cursz; 2570 else if (outsbsz >= sizeof(struct statsblob)) 2571 outsbsz = sizeof(struct statsblob); 2572 else 2573 error = EINVAL; 2574 INP_WUNLOCK(inp); 2575 if (error) 2576 break; 2577 2578 sbp = sopt->sopt_val; 2579 nheld = atop(round_page(((vm_offset_t)sbp) + 2580 (vm_size_t)outsbsz) - trunc_page((vm_offset_t)sbp)); 2581 vm_page_t ma[nheld]; 2582 if (vm_fault_quick_hold_pages( 2583 &curproc->p_vmspace->vm_map, (vm_offset_t)sbp, 2584 outsbsz, VM_PROT_READ | VM_PROT_WRITE, ma, 2585 nheld) < 0) { 2586 error = EFAULT; 2587 break; 2588 } 2589 2590 if ((error = copyin_nofault(&(sbp->flags), &sbflags, 2591 SIZEOF_MEMBER(struct statsblob, flags)))) 2592 goto unhold; 2593 2594 INP_WLOCK_RECHECK(inp); 2595 error = stats_blob_snapshot(&sbp, outsbsz, tp->t_stats, 2596 sbflags | SB_CLONE_USRDSTNOFAULT); 2597 INP_WUNLOCK(inp); 2598 sopt->sopt_valsize = outsbsz; 2599 unhold: 2600 vm_page_unhold_pages(ma, nheld); 2601 #else 2602 INP_WUNLOCK(inp); 2603 error = EOPNOTSUPP; 2604 #endif /* !STATS */ 2605 break; 2606 } 2607 case TCP_CONGESTION: 2608 len = strlcpy(buf, CC_ALGO(tp)->name, TCP_CA_NAME_MAX); 2609 INP_WUNLOCK(inp); 2610 error = sooptcopyout(sopt, buf, len + 1); 2611 break; 2612 case TCP_MAXUNACKTIME: 2613 case TCP_KEEPIDLE: 2614 case TCP_KEEPINTVL: 2615 case TCP_KEEPINIT: 2616 case TCP_KEEPCNT: 2617 switch (sopt->sopt_name) { 2618 case TCP_MAXUNACKTIME: 2619 ui = TP_MAXUNACKTIME(tp) / hz; 2620 break; 2621 case TCP_KEEPIDLE: 2622 ui = TP_KEEPIDLE(tp) / hz; 2623 break; 2624 case TCP_KEEPINTVL: 2625 ui = TP_KEEPINTVL(tp) / hz; 2626 break; 2627 case TCP_KEEPINIT: 2628 ui = TP_KEEPINIT(tp) / hz; 2629 break; 2630 case TCP_KEEPCNT: 2631 ui = TP_KEEPCNT(tp); 2632 break; 2633 } 2634 INP_WUNLOCK(inp); 2635 error = sooptcopyout(sopt, &ui, sizeof(ui)); 2636 break; 2637 #ifdef TCPPCAP 2638 case TCP_PCAP_OUT: 2639 case TCP_PCAP_IN: 2640 optval = tcp_pcap_get_sock_max(TCP_PCAP_OUT ? 2641 &(tp->t_outpkts) : &(tp->t_inpkts)); 2642 INP_WUNLOCK(inp); 2643 error = sooptcopyout(sopt, &optval, sizeof optval); 2644 break; 2645 #endif 2646 case TCP_FASTOPEN: 2647 optval = tp->t_flags & TF_FASTOPEN; 2648 INP_WUNLOCK(inp); 2649 error = sooptcopyout(sopt, &optval, sizeof optval); 2650 break; 2651 #ifdef TCP_BLACKBOX 2652 case TCP_LOG: 2653 optval = tp->t_logstate; 2654 INP_WUNLOCK(inp); 2655 error = sooptcopyout(sopt, &optval, sizeof(optval)); 2656 break; 2657 case TCP_LOGBUF: 2658 /* tcp_log_getlogbuf() does INP_WUNLOCK(inp) */ 2659 error = tcp_log_getlogbuf(sopt, tp); 2660 break; 2661 case TCP_LOGID: 2662 len = tcp_log_get_id(tp, buf); 2663 INP_WUNLOCK(inp); 2664 error = sooptcopyout(sopt, buf, len + 1); 2665 break; 2666 case TCP_LOGDUMP: 2667 case TCP_LOGDUMPID: 2668 INP_WUNLOCK(inp); 2669 error = EINVAL; 2670 break; 2671 #endif 2672 #ifdef KERN_TLS 2673 case TCP_TXTLS_MODE: 2674 error = ktls_get_tx_mode(so, &optval); 2675 INP_WUNLOCK(inp); 2676 if (error == 0) 2677 error = sooptcopyout(sopt, &optval, 2678 sizeof(optval)); 2679 break; 2680 case TCP_RXTLS_MODE: 2681 error = ktls_get_rx_mode(so, &optval); 2682 INP_WUNLOCK(inp); 2683 if (error == 0) 2684 error = sooptcopyout(sopt, &optval, 2685 sizeof(optval)); 2686 break; 2687 #endif 2688 case TCP_LRD: 2689 optval = tp->t_flags & TF_LRD; 2690 INP_WUNLOCK(inp); 2691 error = sooptcopyout(sopt, &optval, sizeof optval); 2692 break; 2693 default: 2694 INP_WUNLOCK(inp); 2695 error = ENOPROTOOPT; 2696 break; 2697 } 2698 break; 2699 } 2700 return (error); 2701 } 2702 #undef INP_WLOCK_RECHECK 2703 #undef INP_WLOCK_RECHECK_CLEANUP 2704 2705 /* 2706 * Initiate (or continue) disconnect. 2707 * If embryonic state, just send reset (once). 2708 * If in ``let data drain'' option and linger null, just drop. 2709 * Otherwise (hard), mark socket disconnecting and drop 2710 * current input data; switch states based on user close, and 2711 * send segment to peer (with FIN). 2712 */ 2713 static void 2714 tcp_disconnect(struct tcpcb *tp) 2715 { 2716 struct inpcb *inp = tp->t_inpcb; 2717 struct socket *so = inp->inp_socket; 2718 2719 NET_EPOCH_ASSERT(); 2720 INP_WLOCK_ASSERT(inp); 2721 2722 /* 2723 * Neither tcp_close() nor tcp_drop() should return NULL, as the 2724 * socket is still open. 2725 */ 2726 if (tp->t_state < TCPS_ESTABLISHED && 2727 !(tp->t_state > TCPS_LISTEN && IS_FASTOPEN(tp->t_flags))) { 2728 tp = tcp_close(tp); 2729 KASSERT(tp != NULL, 2730 ("tcp_disconnect: tcp_close() returned NULL")); 2731 } else if ((so->so_options & SO_LINGER) && so->so_linger == 0) { 2732 tp = tcp_drop(tp, 0); 2733 KASSERT(tp != NULL, 2734 ("tcp_disconnect: tcp_drop() returned NULL")); 2735 } else { 2736 soisdisconnecting(so); 2737 sbflush(&so->so_rcv); 2738 tcp_usrclosed(tp); 2739 if (!(inp->inp_flags & INP_DROPPED)) 2740 /* Ignore stack's drop request, we already at it. */ 2741 (void)tcp_output_nodrop(tp); 2742 } 2743 } 2744 2745 /* 2746 * User issued close, and wish to trail through shutdown states: 2747 * if never received SYN, just forget it. If got a SYN from peer, 2748 * but haven't sent FIN, then go to FIN_WAIT_1 state to send peer a FIN. 2749 * If already got a FIN from peer, then almost done; go to LAST_ACK 2750 * state. In all other cases, have already sent FIN to peer (e.g. 2751 * after PRU_SHUTDOWN), and just have to play tedious game waiting 2752 * for peer to send FIN or not respond to keep-alives, etc. 2753 * We can let the user exit from the close as soon as the FIN is acked. 2754 */ 2755 static void 2756 tcp_usrclosed(struct tcpcb *tp) 2757 { 2758 2759 NET_EPOCH_ASSERT(); 2760 INP_WLOCK_ASSERT(tp->t_inpcb); 2761 2762 switch (tp->t_state) { 2763 case TCPS_LISTEN: 2764 #ifdef TCP_OFFLOAD 2765 tcp_offload_listen_stop(tp); 2766 #endif 2767 tcp_state_change(tp, TCPS_CLOSED); 2768 /* FALLTHROUGH */ 2769 case TCPS_CLOSED: 2770 tp = tcp_close(tp); 2771 /* 2772 * tcp_close() should never return NULL here as the socket is 2773 * still open. 2774 */ 2775 KASSERT(tp != NULL, 2776 ("tcp_usrclosed: tcp_close() returned NULL")); 2777 break; 2778 2779 case TCPS_SYN_SENT: 2780 case TCPS_SYN_RECEIVED: 2781 tp->t_flags |= TF_NEEDFIN; 2782 break; 2783 2784 case TCPS_ESTABLISHED: 2785 tcp_state_change(tp, TCPS_FIN_WAIT_1); 2786 break; 2787 2788 case TCPS_CLOSE_WAIT: 2789 tcp_state_change(tp, TCPS_LAST_ACK); 2790 break; 2791 } 2792 if (tp->t_acktime == 0) 2793 tp->t_acktime = ticks; 2794 if (tp->t_state >= TCPS_FIN_WAIT_2) { 2795 soisdisconnected(tp->t_inpcb->inp_socket); 2796 /* Prevent the connection hanging in FIN_WAIT_2 forever. */ 2797 if (tp->t_state == TCPS_FIN_WAIT_2) { 2798 int timeout; 2799 2800 timeout = (tcp_fast_finwait2_recycle) ? 2801 tcp_finwait2_timeout : TP_MAXIDLE(tp); 2802 tcp_timer_activate(tp, TT_2MSL, timeout); 2803 } 2804 } 2805 } 2806 2807 #ifdef DDB 2808 static void 2809 db_print_indent(int indent) 2810 { 2811 int i; 2812 2813 for (i = 0; i < indent; i++) 2814 db_printf(" "); 2815 } 2816 2817 static void 2818 db_print_tstate(int t_state) 2819 { 2820 2821 switch (t_state) { 2822 case TCPS_CLOSED: 2823 db_printf("TCPS_CLOSED"); 2824 return; 2825 2826 case TCPS_LISTEN: 2827 db_printf("TCPS_LISTEN"); 2828 return; 2829 2830 case TCPS_SYN_SENT: 2831 db_printf("TCPS_SYN_SENT"); 2832 return; 2833 2834 case TCPS_SYN_RECEIVED: 2835 db_printf("TCPS_SYN_RECEIVED"); 2836 return; 2837 2838 case TCPS_ESTABLISHED: 2839 db_printf("TCPS_ESTABLISHED"); 2840 return; 2841 2842 case TCPS_CLOSE_WAIT: 2843 db_printf("TCPS_CLOSE_WAIT"); 2844 return; 2845 2846 case TCPS_FIN_WAIT_1: 2847 db_printf("TCPS_FIN_WAIT_1"); 2848 return; 2849 2850 case TCPS_CLOSING: 2851 db_printf("TCPS_CLOSING"); 2852 return; 2853 2854 case TCPS_LAST_ACK: 2855 db_printf("TCPS_LAST_ACK"); 2856 return; 2857 2858 case TCPS_FIN_WAIT_2: 2859 db_printf("TCPS_FIN_WAIT_2"); 2860 return; 2861 2862 case TCPS_TIME_WAIT: 2863 db_printf("TCPS_TIME_WAIT"); 2864 return; 2865 2866 default: 2867 db_printf("unknown"); 2868 return; 2869 } 2870 } 2871 2872 static void 2873 db_print_tflags(u_int t_flags) 2874 { 2875 int comma; 2876 2877 comma = 0; 2878 if (t_flags & TF_ACKNOW) { 2879 db_printf("%sTF_ACKNOW", comma ? ", " : ""); 2880 comma = 1; 2881 } 2882 if (t_flags & TF_DELACK) { 2883 db_printf("%sTF_DELACK", comma ? ", " : ""); 2884 comma = 1; 2885 } 2886 if (t_flags & TF_NODELAY) { 2887 db_printf("%sTF_NODELAY", comma ? ", " : ""); 2888 comma = 1; 2889 } 2890 if (t_flags & TF_NOOPT) { 2891 db_printf("%sTF_NOOPT", comma ? ", " : ""); 2892 comma = 1; 2893 } 2894 if (t_flags & TF_SENTFIN) { 2895 db_printf("%sTF_SENTFIN", comma ? ", " : ""); 2896 comma = 1; 2897 } 2898 if (t_flags & TF_REQ_SCALE) { 2899 db_printf("%sTF_REQ_SCALE", comma ? ", " : ""); 2900 comma = 1; 2901 } 2902 if (t_flags & TF_RCVD_SCALE) { 2903 db_printf("%sTF_RECVD_SCALE", comma ? ", " : ""); 2904 comma = 1; 2905 } 2906 if (t_flags & TF_REQ_TSTMP) { 2907 db_printf("%sTF_REQ_TSTMP", comma ? ", " : ""); 2908 comma = 1; 2909 } 2910 if (t_flags & TF_RCVD_TSTMP) { 2911 db_printf("%sTF_RCVD_TSTMP", comma ? ", " : ""); 2912 comma = 1; 2913 } 2914 if (t_flags & TF_SACK_PERMIT) { 2915 db_printf("%sTF_SACK_PERMIT", comma ? ", " : ""); 2916 comma = 1; 2917 } 2918 if (t_flags & TF_NEEDSYN) { 2919 db_printf("%sTF_NEEDSYN", comma ? ", " : ""); 2920 comma = 1; 2921 } 2922 if (t_flags & TF_NEEDFIN) { 2923 db_printf("%sTF_NEEDFIN", comma ? ", " : ""); 2924 comma = 1; 2925 } 2926 if (t_flags & TF_NOPUSH) { 2927 db_printf("%sTF_NOPUSH", comma ? ", " : ""); 2928 comma = 1; 2929 } 2930 if (t_flags & TF_PREVVALID) { 2931 db_printf("%sTF_PREVVALID", comma ? ", " : ""); 2932 comma = 1; 2933 } 2934 if (t_flags & TF_MORETOCOME) { 2935 db_printf("%sTF_MORETOCOME", comma ? ", " : ""); 2936 comma = 1; 2937 } 2938 if (t_flags & TF_SONOTCONN) { 2939 db_printf("%sTF_SONOTCONN", comma ? ", " : ""); 2940 comma = 1; 2941 } 2942 if (t_flags & TF_LASTIDLE) { 2943 db_printf("%sTF_LASTIDLE", comma ? ", " : ""); 2944 comma = 1; 2945 } 2946 if (t_flags & TF_RXWIN0SENT) { 2947 db_printf("%sTF_RXWIN0SENT", comma ? ", " : ""); 2948 comma = 1; 2949 } 2950 if (t_flags & TF_FASTRECOVERY) { 2951 db_printf("%sTF_FASTRECOVERY", comma ? ", " : ""); 2952 comma = 1; 2953 } 2954 if (t_flags & TF_CONGRECOVERY) { 2955 db_printf("%sTF_CONGRECOVERY", comma ? ", " : ""); 2956 comma = 1; 2957 } 2958 if (t_flags & TF_WASFRECOVERY) { 2959 db_printf("%sTF_WASFRECOVERY", comma ? ", " : ""); 2960 comma = 1; 2961 } 2962 if (t_flags & TF_WASCRECOVERY) { 2963 db_printf("%sTF_WASCRECOVERY", comma ? ", " : ""); 2964 comma = 1; 2965 } 2966 if (t_flags & TF_SIGNATURE) { 2967 db_printf("%sTF_SIGNATURE", comma ? ", " : ""); 2968 comma = 1; 2969 } 2970 if (t_flags & TF_FORCEDATA) { 2971 db_printf("%sTF_FORCEDATA", comma ? ", " : ""); 2972 comma = 1; 2973 } 2974 if (t_flags & TF_TSO) { 2975 db_printf("%sTF_TSO", comma ? ", " : ""); 2976 comma = 1; 2977 } 2978 if (t_flags & TF_FASTOPEN) { 2979 db_printf("%sTF_FASTOPEN", comma ? ", " : ""); 2980 comma = 1; 2981 } 2982 } 2983 2984 static void 2985 db_print_tflags2(u_int t_flags2) 2986 { 2987 int comma; 2988 2989 comma = 0; 2990 if (t_flags2 & TF2_PLPMTU_BLACKHOLE) { 2991 db_printf("%sTF2_PLPMTU_BLACKHOLE", comma ? ", " : ""); 2992 comma = 1; 2993 } 2994 if (t_flags2 & TF2_PLPMTU_PMTUD) { 2995 db_printf("%sTF2_PLPMTU_PMTUD", comma ? ", " : ""); 2996 comma = 1; 2997 } 2998 if (t_flags2 & TF2_PLPMTU_MAXSEGSNT) { 2999 db_printf("%sTF2_PLPMTU_MAXSEGSNT", comma ? ", " : ""); 3000 comma = 1; 3001 } 3002 if (t_flags2 & TF2_LOG_AUTO) { 3003 db_printf("%sTF2_LOG_AUTO", comma ? ", " : ""); 3004 comma = 1; 3005 } 3006 if (t_flags2 & TF2_DROP_AF_DATA) { 3007 db_printf("%sTF2_DROP_AF_DATA", comma ? ", " : ""); 3008 comma = 1; 3009 } 3010 if (t_flags2 & TF2_ECN_PERMIT) { 3011 db_printf("%sTF2_ECN_PERMIT", comma ? ", " : ""); 3012 comma = 1; 3013 } 3014 if (t_flags2 & TF2_ECN_SND_CWR) { 3015 db_printf("%sTF2_ECN_SND_CWR", comma ? ", " : ""); 3016 comma = 1; 3017 } 3018 if (t_flags2 & TF2_ECN_SND_ECE) { 3019 db_printf("%sTF2_ECN_SND_ECE", comma ? ", " : ""); 3020 comma = 1; 3021 } 3022 if (t_flags2 & TF2_ACE_PERMIT) { 3023 db_printf("%sTF2_ACE_PERMIT", comma ? ", " : ""); 3024 comma = 1; 3025 } 3026 if (t_flags2 & TF2_FBYTES_COMPLETE) { 3027 db_printf("%sTF2_FBYTES_COMPLETE", comma ? ", " : ""); 3028 comma = 1; 3029 } 3030 } 3031 3032 static void 3033 db_print_toobflags(char t_oobflags) 3034 { 3035 int comma; 3036 3037 comma = 0; 3038 if (t_oobflags & TCPOOB_HAVEDATA) { 3039 db_printf("%sTCPOOB_HAVEDATA", comma ? ", " : ""); 3040 comma = 1; 3041 } 3042 if (t_oobflags & TCPOOB_HADDATA) { 3043 db_printf("%sTCPOOB_HADDATA", comma ? ", " : ""); 3044 comma = 1; 3045 } 3046 } 3047 3048 static void 3049 db_print_tcpcb(struct tcpcb *tp, const char *name, int indent) 3050 { 3051 3052 db_print_indent(indent); 3053 db_printf("%s at %p\n", name, tp); 3054 3055 indent += 2; 3056 3057 db_print_indent(indent); 3058 db_printf("t_segq first: %p t_segqlen: %d t_dupacks: %d\n", 3059 TAILQ_FIRST(&tp->t_segq), tp->t_segqlen, tp->t_dupacks); 3060 3061 db_print_indent(indent); 3062 db_printf("tt_rexmt: %p tt_persist: %p tt_keep: %p\n", 3063 &tp->t_timers->tt_rexmt, &tp->t_timers->tt_persist, &tp->t_timers->tt_keep); 3064 3065 db_print_indent(indent); 3066 db_printf("tt_2msl: %p tt_delack: %p t_inpcb: %p\n", &tp->t_timers->tt_2msl, 3067 &tp->t_timers->tt_delack, tp->t_inpcb); 3068 3069 db_print_indent(indent); 3070 db_printf("t_state: %d (", tp->t_state); 3071 db_print_tstate(tp->t_state); 3072 db_printf(")\n"); 3073 3074 db_print_indent(indent); 3075 db_printf("t_flags: 0x%x (", tp->t_flags); 3076 db_print_tflags(tp->t_flags); 3077 db_printf(")\n"); 3078 3079 db_print_indent(indent); 3080 db_printf("t_flags2: 0x%x (", tp->t_flags2); 3081 db_print_tflags2(tp->t_flags2); 3082 db_printf(")\n"); 3083 3084 db_print_indent(indent); 3085 db_printf("snd_una: 0x%08x snd_max: 0x%08x snd_nxt: x0%08x\n", 3086 tp->snd_una, tp->snd_max, tp->snd_nxt); 3087 3088 db_print_indent(indent); 3089 db_printf("snd_up: 0x%08x snd_wl1: 0x%08x snd_wl2: 0x%08x\n", 3090 tp->snd_up, tp->snd_wl1, tp->snd_wl2); 3091 3092 db_print_indent(indent); 3093 db_printf("iss: 0x%08x irs: 0x%08x rcv_nxt: 0x%08x\n", 3094 tp->iss, tp->irs, tp->rcv_nxt); 3095 3096 db_print_indent(indent); 3097 db_printf("rcv_adv: 0x%08x rcv_wnd: %u rcv_up: 0x%08x\n", 3098 tp->rcv_adv, tp->rcv_wnd, tp->rcv_up); 3099 3100 db_print_indent(indent); 3101 db_printf("snd_wnd: %u snd_cwnd: %u\n", 3102 tp->snd_wnd, tp->snd_cwnd); 3103 3104 db_print_indent(indent); 3105 db_printf("snd_ssthresh: %u snd_recover: " 3106 "0x%08x\n", tp->snd_ssthresh, tp->snd_recover); 3107 3108 db_print_indent(indent); 3109 db_printf("t_rcvtime: %u t_startime: %u\n", 3110 tp->t_rcvtime, tp->t_starttime); 3111 3112 db_print_indent(indent); 3113 db_printf("t_rttime: %u t_rtsq: 0x%08x\n", 3114 tp->t_rtttime, tp->t_rtseq); 3115 3116 db_print_indent(indent); 3117 db_printf("t_rxtcur: %d t_maxseg: %u t_srtt: %d\n", 3118 tp->t_rxtcur, tp->t_maxseg, tp->t_srtt); 3119 3120 db_print_indent(indent); 3121 db_printf("t_rttvar: %d t_rxtshift: %d t_rttmin: %u " 3122 "t_rttbest: %u\n", tp->t_rttvar, tp->t_rxtshift, tp->t_rttmin, 3123 tp->t_rttbest); 3124 3125 db_print_indent(indent); 3126 db_printf("t_rttupdated: %lu max_sndwnd: %u t_softerror: %d\n", 3127 tp->t_rttupdated, tp->max_sndwnd, tp->t_softerror); 3128 3129 db_print_indent(indent); 3130 db_printf("t_oobflags: 0x%x (", tp->t_oobflags); 3131 db_print_toobflags(tp->t_oobflags); 3132 db_printf(") t_iobc: 0x%02x\n", tp->t_iobc); 3133 3134 db_print_indent(indent); 3135 db_printf("snd_scale: %u rcv_scale: %u request_r_scale: %u\n", 3136 tp->snd_scale, tp->rcv_scale, tp->request_r_scale); 3137 3138 db_print_indent(indent); 3139 db_printf("ts_recent: %u ts_recent_age: %u\n", 3140 tp->ts_recent, tp->ts_recent_age); 3141 3142 db_print_indent(indent); 3143 db_printf("ts_offset: %u last_ack_sent: 0x%08x snd_cwnd_prev: " 3144 "%u\n", tp->ts_offset, tp->last_ack_sent, tp->snd_cwnd_prev); 3145 3146 db_print_indent(indent); 3147 db_printf("snd_ssthresh_prev: %u snd_recover_prev: 0x%08x " 3148 "t_badrxtwin: %u\n", tp->snd_ssthresh_prev, 3149 tp->snd_recover_prev, tp->t_badrxtwin); 3150 3151 db_print_indent(indent); 3152 db_printf("snd_numholes: %d snd_holes first: %p\n", 3153 tp->snd_numholes, TAILQ_FIRST(&tp->snd_holes)); 3154 3155 db_print_indent(indent); 3156 db_printf("snd_fack: 0x%08x rcv_numsacks: %d\n", 3157 tp->snd_fack, tp->rcv_numsacks); 3158 3159 /* Skip sackblks, sackhint. */ 3160 3161 db_print_indent(indent); 3162 db_printf("t_rttlow: %d rfbuf_ts: %u rfbuf_cnt: %d\n", 3163 tp->t_rttlow, tp->rfbuf_ts, tp->rfbuf_cnt); 3164 } 3165 3166 DB_SHOW_COMMAND(tcpcb, db_show_tcpcb) 3167 { 3168 struct tcpcb *tp; 3169 3170 if (!have_addr) { 3171 db_printf("usage: show tcpcb <addr>\n"); 3172 return; 3173 } 3174 tp = (struct tcpcb *)addr; 3175 3176 db_print_tcpcb(tp, "tcpcb", 0); 3177 } 3178 #endif 3179