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 #ifdef TCPDEBUG 107 #include <netinet/tcp_debug.h> 108 #endif 109 #ifdef TCP_OFFLOAD 110 #include <netinet/tcp_offload.h> 111 #endif 112 #include <netipsec/ipsec_support.h> 113 114 #include <vm/vm.h> 115 #include <vm/vm_param.h> 116 #include <vm/pmap.h> 117 #include <vm/vm_extern.h> 118 #include <vm/vm_map.h> 119 #include <vm/vm_page.h> 120 121 /* 122 * TCP protocol interface to socket abstraction. 123 */ 124 #ifdef INET 125 static int tcp_connect(struct tcpcb *, struct sockaddr *, 126 struct thread *td); 127 #endif /* INET */ 128 #ifdef INET6 129 static int tcp6_connect(struct tcpcb *, struct sockaddr *, 130 struct thread *td); 131 #endif /* INET6 */ 132 static void tcp_disconnect(struct tcpcb *); 133 static void tcp_usrclosed(struct tcpcb *); 134 static void tcp_fill_info(struct tcpcb *, struct tcp_info *); 135 136 static int tcp_pru_options_support(struct tcpcb *tp, int flags); 137 138 #ifdef TCPDEBUG 139 #define TCPDEBUG0 int ostate = 0 140 #define TCPDEBUG1() ostate = tp ? tp->t_state : 0 141 #define TCPDEBUG2(req) if (tp && (so->so_options & SO_DEBUG)) \ 142 tcp_trace(TA_USER, ostate, tp, 0, 0, req) 143 #else 144 #define TCPDEBUG0 145 #define TCPDEBUG1() 146 #define TCPDEBUG2(req) 147 #endif 148 149 /* 150 * tcp_require_unique port requires a globally-unique source port for each 151 * outgoing connection. The default is to require the 4-tuple to be unique. 152 */ 153 VNET_DEFINE(int, tcp_require_unique_port) = 0; 154 SYSCTL_INT(_net_inet_tcp, OID_AUTO, require_unique_port, 155 CTLFLAG_VNET | CTLFLAG_RW, &VNET_NAME(tcp_require_unique_port), 0, 156 "Require globally-unique ephemeral port for outgoing connections"); 157 #define V_tcp_require_unique_port VNET(tcp_require_unique_port) 158 159 /* 160 * TCP attaches to socket via pru_attach(), reserving space, 161 * and an internet control block. 162 */ 163 static int 164 tcp_usr_attach(struct socket *so, int proto, struct thread *td) 165 { 166 struct inpcb *inp; 167 struct tcpcb *tp = NULL; 168 int error; 169 TCPDEBUG0; 170 171 inp = sotoinpcb(so); 172 KASSERT(inp == NULL, ("tcp_usr_attach: inp != NULL")); 173 TCPDEBUG1(); 174 175 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 176 error = soreserve(so, V_tcp_sendspace, V_tcp_recvspace); 177 if (error) 178 goto out; 179 } 180 181 so->so_rcv.sb_flags |= SB_AUTOSIZE; 182 so->so_snd.sb_flags |= SB_AUTOSIZE; 183 error = in_pcballoc(so, &V_tcbinfo); 184 if (error) 185 goto out; 186 inp = sotoinpcb(so); 187 #ifdef INET6 188 if (inp->inp_vflag & INP_IPV6PROTO) { 189 inp->inp_vflag |= INP_IPV6; 190 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) 191 inp->inp_vflag |= INP_IPV4; 192 inp->in6p_hops = -1; /* use kernel default */ 193 } 194 else 195 #endif 196 inp->inp_vflag |= INP_IPV4; 197 tp = tcp_newtcpcb(inp); 198 if (tp == NULL) { 199 error = ENOBUFS; 200 in_pcbdetach(inp); 201 in_pcbfree(inp); 202 goto out; 203 } 204 tp->t_state = TCPS_CLOSED; 205 INP_WUNLOCK(inp); 206 TCPSTATES_INC(TCPS_CLOSED); 207 out: 208 TCPDEBUG2(PRU_ATTACH); 209 TCP_PROBE2(debug__user, tp, PRU_ATTACH); 210 return (error); 211 } 212 213 /* 214 * tcp_usr_detach is called when the socket layer loses its final reference 215 * to the socket, be it a file descriptor reference, a reference from TCP, 216 * etc. At this point, there is only one case in which we will keep around 217 * inpcb state: time wait. 218 */ 219 static void 220 tcp_usr_detach(struct socket *so) 221 { 222 struct inpcb *inp; 223 struct tcpcb *tp; 224 225 inp = sotoinpcb(so); 226 KASSERT(inp != NULL, ("%s: inp == NULL", __func__)); 227 INP_WLOCK(inp); 228 KASSERT(so->so_pcb == inp && inp->inp_socket == so, 229 ("%s: socket %p inp %p mismatch", __func__, so, inp)); 230 231 tp = intotcpcb(inp); 232 233 if (inp->inp_flags & INP_TIMEWAIT) { 234 /* 235 * There are two cases to handle: one in which the time wait 236 * state is being discarded (INP_DROPPED), and one in which 237 * this connection will remain in timewait. In the former, 238 * it is time to discard all state (except tcptw, which has 239 * already been discarded by the timewait close code, which 240 * should be further up the call stack somewhere). In the 241 * latter case, we detach from the socket, but leave the pcb 242 * present until timewait ends. 243 * 244 * XXXRW: Would it be cleaner to free the tcptw here? 245 * 246 * Astute question indeed, from twtcp perspective there are 247 * four cases to consider: 248 * 249 * #1 tcp_usr_detach is called at tcptw creation time by 250 * tcp_twstart, then do not discard the newly created tcptw 251 * and leave inpcb present until timewait ends 252 * #2 tcp_usr_detach is called at tcptw creation time by 253 * tcp_twstart, but connection is local and tw will be 254 * discarded immediately 255 * #3 tcp_usr_detach is called at timewait end (or reuse) by 256 * tcp_twclose, then the tcptw has already been discarded 257 * (or reused) and inpcb is freed here 258 * #4 tcp_usr_detach is called() after timewait ends (or reuse) 259 * (e.g. by soclose), then tcptw has already been discarded 260 * (or reused) and inpcb is freed here 261 * 262 * In all three cases the tcptw should not be freed here. 263 */ 264 if (inp->inp_flags & INP_DROPPED) { 265 KASSERT(tp == NULL, ("tcp_detach: INP_TIMEWAIT && " 266 "INP_DROPPED && tp != NULL")); 267 in_pcbdetach(inp); 268 in_pcbfree(inp); 269 } else { 270 in_pcbdetach(inp); 271 INP_WUNLOCK(inp); 272 } 273 } else { 274 /* 275 * If the connection is not in timewait, we consider two 276 * two conditions: one in which no further processing is 277 * necessary (dropped || embryonic), and one in which TCP is 278 * not yet done, but no longer requires the socket, so the 279 * pcb will persist for the time being. 280 * 281 * XXXRW: Does the second case still occur? 282 */ 283 if (inp->inp_flags & INP_DROPPED || 284 tp->t_state < TCPS_SYN_SENT) { 285 tcp_discardcb(tp); 286 in_pcbdetach(inp); 287 in_pcbfree(inp); 288 } else { 289 in_pcbdetach(inp); 290 INP_WUNLOCK(inp); 291 } 292 } 293 } 294 295 #ifdef INET 296 /* 297 * Give the socket an address. 298 */ 299 static int 300 tcp_usr_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 301 { 302 int error = 0; 303 struct inpcb *inp; 304 #ifdef KDTRACE_HOOKS 305 struct tcpcb *tp = NULL; 306 #endif 307 struct sockaddr_in *sinp; 308 309 sinp = (struct sockaddr_in *)nam; 310 if (nam->sa_family != AF_INET) { 311 /* 312 * Preserve compatibility with old programs. 313 */ 314 if (nam->sa_family != AF_UNSPEC || 315 nam->sa_len < offsetof(struct sockaddr_in, sin_zero) || 316 sinp->sin_addr.s_addr != INADDR_ANY) 317 return (EAFNOSUPPORT); 318 nam->sa_family = AF_INET; 319 } 320 if (nam->sa_len != sizeof(*sinp)) 321 return (EINVAL); 322 323 /* 324 * Must check for multicast addresses and disallow binding 325 * to them. 326 */ 327 if (IN_MULTICAST(ntohl(sinp->sin_addr.s_addr))) 328 return (EAFNOSUPPORT); 329 330 TCPDEBUG0; 331 inp = sotoinpcb(so); 332 KASSERT(inp != NULL, ("tcp_usr_bind: inp == NULL")); 333 INP_WLOCK(inp); 334 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 335 error = EINVAL; 336 goto out; 337 } 338 #ifdef KDTRACE_HOOKS 339 tp = intotcpcb(inp); 340 #endif 341 TCPDEBUG1(); 342 INP_HASH_WLOCK(&V_tcbinfo); 343 error = in_pcbbind(inp, nam, td->td_ucred); 344 INP_HASH_WUNLOCK(&V_tcbinfo); 345 out: 346 TCPDEBUG2(PRU_BIND); 347 TCP_PROBE2(debug__user, tp, PRU_BIND); 348 INP_WUNLOCK(inp); 349 350 return (error); 351 } 352 #endif /* INET */ 353 354 #ifdef INET6 355 static int 356 tcp6_usr_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 357 { 358 int error = 0; 359 struct inpcb *inp; 360 #ifdef KDTRACE_HOOKS 361 struct tcpcb *tp = NULL; 362 #endif 363 struct sockaddr_in6 *sin6; 364 u_char vflagsav; 365 366 sin6 = (struct sockaddr_in6 *)nam; 367 if (nam->sa_family != AF_INET6) 368 return (EAFNOSUPPORT); 369 if (nam->sa_len != sizeof(*sin6)) 370 return (EINVAL); 371 372 /* 373 * Must check for multicast addresses and disallow binding 374 * to them. 375 */ 376 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 377 return (EAFNOSUPPORT); 378 379 TCPDEBUG0; 380 inp = sotoinpcb(so); 381 KASSERT(inp != NULL, ("tcp6_usr_bind: inp == NULL")); 382 INP_WLOCK(inp); 383 vflagsav = inp->inp_vflag; 384 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 385 error = EINVAL; 386 goto out; 387 } 388 #ifdef KDTRACE_HOOKS 389 tp = intotcpcb(inp); 390 #endif 391 TCPDEBUG1(); 392 INP_HASH_WLOCK(&V_tcbinfo); 393 inp->inp_vflag &= ~INP_IPV4; 394 inp->inp_vflag |= INP_IPV6; 395 #ifdef INET 396 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 397 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 398 inp->inp_vflag |= INP_IPV4; 399 else if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 400 struct sockaddr_in sin; 401 402 in6_sin6_2_sin(&sin, sin6); 403 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 404 error = EAFNOSUPPORT; 405 INP_HASH_WUNLOCK(&V_tcbinfo); 406 goto out; 407 } 408 inp->inp_vflag |= INP_IPV4; 409 inp->inp_vflag &= ~INP_IPV6; 410 error = in_pcbbind(inp, (struct sockaddr *)&sin, 411 td->td_ucred); 412 INP_HASH_WUNLOCK(&V_tcbinfo); 413 goto out; 414 } 415 } 416 #endif 417 error = in6_pcbbind(inp, nam, td->td_ucred); 418 INP_HASH_WUNLOCK(&V_tcbinfo); 419 out: 420 if (error != 0) 421 inp->inp_vflag = vflagsav; 422 TCPDEBUG2(PRU_BIND); 423 TCP_PROBE2(debug__user, tp, PRU_BIND); 424 INP_WUNLOCK(inp); 425 return (error); 426 } 427 #endif /* INET6 */ 428 429 #ifdef INET 430 /* 431 * Prepare to accept connections. 432 */ 433 static int 434 tcp_usr_listen(struct socket *so, int backlog, struct thread *td) 435 { 436 int error = 0; 437 struct inpcb *inp; 438 struct tcpcb *tp = NULL; 439 440 TCPDEBUG0; 441 inp = sotoinpcb(so); 442 KASSERT(inp != NULL, ("tcp_usr_listen: inp == NULL")); 443 INP_WLOCK(inp); 444 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 445 error = EINVAL; 446 goto out; 447 } 448 tp = intotcpcb(inp); 449 TCPDEBUG1(); 450 SOCK_LOCK(so); 451 error = solisten_proto_check(so); 452 if (error != 0) { 453 SOCK_UNLOCK(so); 454 goto out; 455 } 456 if (inp->inp_lport == 0) { 457 INP_HASH_WLOCK(&V_tcbinfo); 458 error = in_pcbbind(inp, NULL, td->td_ucred); 459 INP_HASH_WUNLOCK(&V_tcbinfo); 460 } 461 if (error == 0) { 462 tcp_state_change(tp, TCPS_LISTEN); 463 solisten_proto(so, backlog); 464 #ifdef TCP_OFFLOAD 465 if ((so->so_options & SO_NO_OFFLOAD) == 0) 466 tcp_offload_listen_start(tp); 467 #endif 468 } else { 469 solisten_proto_abort(so); 470 } 471 SOCK_UNLOCK(so); 472 473 if (IS_FASTOPEN(tp->t_flags)) 474 tp->t_tfo_pending = tcp_fastopen_alloc_counter(); 475 476 out: 477 TCPDEBUG2(PRU_LISTEN); 478 TCP_PROBE2(debug__user, tp, PRU_LISTEN); 479 INP_WUNLOCK(inp); 480 return (error); 481 } 482 #endif /* INET */ 483 484 #ifdef INET6 485 static int 486 tcp6_usr_listen(struct socket *so, int backlog, struct thread *td) 487 { 488 int error = 0; 489 struct inpcb *inp; 490 struct tcpcb *tp = NULL; 491 u_char vflagsav; 492 493 TCPDEBUG0; 494 inp = sotoinpcb(so); 495 KASSERT(inp != NULL, ("tcp6_usr_listen: inp == NULL")); 496 INP_WLOCK(inp); 497 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 498 error = EINVAL; 499 goto out; 500 } 501 vflagsav = inp->inp_vflag; 502 tp = intotcpcb(inp); 503 TCPDEBUG1(); 504 SOCK_LOCK(so); 505 error = solisten_proto_check(so); 506 if (error != 0) { 507 SOCK_UNLOCK(so); 508 goto out; 509 } 510 INP_HASH_WLOCK(&V_tcbinfo); 511 if (inp->inp_lport == 0) { 512 inp->inp_vflag &= ~INP_IPV4; 513 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) 514 inp->inp_vflag |= INP_IPV4; 515 error = in6_pcbbind(inp, NULL, td->td_ucred); 516 } 517 INP_HASH_WUNLOCK(&V_tcbinfo); 518 if (error == 0) { 519 tcp_state_change(tp, TCPS_LISTEN); 520 solisten_proto(so, backlog); 521 #ifdef TCP_OFFLOAD 522 if ((so->so_options & SO_NO_OFFLOAD) == 0) 523 tcp_offload_listen_start(tp); 524 #endif 525 } else { 526 solisten_proto_abort(so); 527 } 528 SOCK_UNLOCK(so); 529 530 if (IS_FASTOPEN(tp->t_flags)) 531 tp->t_tfo_pending = tcp_fastopen_alloc_counter(); 532 533 if (error != 0) 534 inp->inp_vflag = vflagsav; 535 536 out: 537 TCPDEBUG2(PRU_LISTEN); 538 TCP_PROBE2(debug__user, tp, PRU_LISTEN); 539 INP_WUNLOCK(inp); 540 return (error); 541 } 542 #endif /* INET6 */ 543 544 #ifdef INET 545 /* 546 * Initiate connection to peer. 547 * Create a template for use in transmissions on this connection. 548 * Enter SYN_SENT state, and mark socket as connecting. 549 * Start keep-alive timer, and seed output sequence space. 550 * Send initial segment on connection. 551 */ 552 static int 553 tcp_usr_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 554 { 555 struct epoch_tracker et; 556 int error = 0; 557 struct inpcb *inp; 558 struct tcpcb *tp = NULL; 559 struct sockaddr_in *sinp; 560 561 sinp = (struct sockaddr_in *)nam; 562 if (nam->sa_family != AF_INET) 563 return (EAFNOSUPPORT); 564 if (nam->sa_len != sizeof (*sinp)) 565 return (EINVAL); 566 567 /* 568 * Must disallow TCP ``connections'' to multicast addresses. 569 */ 570 if (IN_MULTICAST(ntohl(sinp->sin_addr.s_addr))) 571 return (EAFNOSUPPORT); 572 if (ntohl(sinp->sin_addr.s_addr) == INADDR_BROADCAST) 573 return (EACCES); 574 if ((error = prison_remote_ip4(td->td_ucred, &sinp->sin_addr)) != 0) 575 return (error); 576 577 TCPDEBUG0; 578 inp = sotoinpcb(so); 579 KASSERT(inp != NULL, ("tcp_usr_connect: inp == NULL")); 580 INP_WLOCK(inp); 581 if (inp->inp_flags & INP_TIMEWAIT) { 582 error = EADDRINUSE; 583 goto out; 584 } 585 if (inp->inp_flags & INP_DROPPED) { 586 error = ECONNREFUSED; 587 goto out; 588 } 589 if (SOLISTENING(so)) { 590 error = EOPNOTSUPP; 591 goto out; 592 } 593 tp = intotcpcb(inp); 594 TCPDEBUG1(); 595 NET_EPOCH_ENTER(et); 596 if ((error = tcp_connect(tp, nam, td)) != 0) 597 goto out_in_epoch; 598 #ifdef TCP_OFFLOAD 599 if (registered_toedevs > 0 && 600 (so->so_options & SO_NO_OFFLOAD) == 0 && 601 (error = tcp_offload_connect(so, nam)) == 0) 602 goto out_in_epoch; 603 #endif 604 tcp_timer_activate(tp, TT_KEEP, TP_KEEPINIT(tp)); 605 error = tcp_output(tp); 606 KASSERT(error >= 0, ("TCP stack %s requested tcp_drop(%p) at connect()" 607 ", error code %d", tp->t_fb->tfb_tcp_block_name, tp, -error)); 608 out_in_epoch: 609 NET_EPOCH_EXIT(et); 610 out: 611 TCPDEBUG2(PRU_CONNECT); 612 TCP_PROBE2(debug__user, tp, PRU_CONNECT); 613 INP_WUNLOCK(inp); 614 return (error); 615 } 616 #endif /* INET */ 617 618 #ifdef INET6 619 static int 620 tcp6_usr_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 621 { 622 struct epoch_tracker et; 623 int error = 0; 624 struct inpcb *inp; 625 struct tcpcb *tp = NULL; 626 struct sockaddr_in6 *sin6; 627 u_int8_t incflagsav; 628 u_char vflagsav; 629 630 TCPDEBUG0; 631 632 sin6 = (struct sockaddr_in6 *)nam; 633 if (nam->sa_family != AF_INET6) 634 return (EAFNOSUPPORT); 635 if (nam->sa_len != sizeof (*sin6)) 636 return (EINVAL); 637 638 /* 639 * Must disallow TCP ``connections'' to multicast addresses. 640 */ 641 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 642 return (EAFNOSUPPORT); 643 644 inp = sotoinpcb(so); 645 KASSERT(inp != NULL, ("tcp6_usr_connect: inp == NULL")); 646 INP_WLOCK(inp); 647 vflagsav = inp->inp_vflag; 648 incflagsav = inp->inp_inc.inc_flags; 649 if (inp->inp_flags & INP_TIMEWAIT) { 650 error = EADDRINUSE; 651 goto out; 652 } 653 if (inp->inp_flags & INP_DROPPED) { 654 error = ECONNREFUSED; 655 goto out; 656 } 657 if (SOLISTENING(so)) { 658 error = EINVAL; 659 goto out; 660 } 661 tp = intotcpcb(inp); 662 TCPDEBUG1(); 663 #ifdef INET 664 /* 665 * XXXRW: Some confusion: V4/V6 flags relate to binding, and 666 * therefore probably require the hash lock, which isn't held here. 667 * Is this a significant problem? 668 */ 669 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 670 struct sockaddr_in sin; 671 672 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0) { 673 error = EINVAL; 674 goto out; 675 } 676 if ((inp->inp_vflag & INP_IPV4) == 0) { 677 error = EAFNOSUPPORT; 678 goto out; 679 } 680 681 in6_sin6_2_sin(&sin, sin6); 682 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 683 error = EAFNOSUPPORT; 684 goto out; 685 } 686 if (ntohl(sin.sin_addr.s_addr) == INADDR_BROADCAST) { 687 error = EACCES; 688 goto out; 689 } 690 if ((error = prison_remote_ip4(td->td_ucred, 691 &sin.sin_addr)) != 0) 692 goto out; 693 inp->inp_vflag |= INP_IPV4; 694 inp->inp_vflag &= ~INP_IPV6; 695 NET_EPOCH_ENTER(et); 696 if ((error = tcp_connect(tp, (struct sockaddr *)&sin, td)) != 0) 697 goto out_in_epoch; 698 #ifdef TCP_OFFLOAD 699 if (registered_toedevs > 0 && 700 (so->so_options & SO_NO_OFFLOAD) == 0 && 701 (error = tcp_offload_connect(so, nam)) == 0) 702 goto out_in_epoch; 703 #endif 704 error = tcp_output(tp); 705 goto out_in_epoch; 706 } else { 707 if ((inp->inp_vflag & INP_IPV6) == 0) { 708 error = EAFNOSUPPORT; 709 goto out; 710 } 711 } 712 #endif 713 if ((error = prison_remote_ip6(td->td_ucred, &sin6->sin6_addr)) != 0) 714 goto out; 715 inp->inp_vflag &= ~INP_IPV4; 716 inp->inp_vflag |= INP_IPV6; 717 inp->inp_inc.inc_flags |= INC_ISIPV6; 718 if ((error = tcp6_connect(tp, nam, td)) != 0) 719 goto out; 720 #ifdef TCP_OFFLOAD 721 if (registered_toedevs > 0 && 722 (so->so_options & SO_NO_OFFLOAD) == 0 && 723 (error = tcp_offload_connect(so, nam)) == 0) 724 goto out; 725 #endif 726 tcp_timer_activate(tp, TT_KEEP, TP_KEEPINIT(tp)); 727 NET_EPOCH_ENTER(et); 728 error = tcp_output(tp); 729 #ifdef INET 730 out_in_epoch: 731 #endif 732 NET_EPOCH_EXIT(et); 733 out: 734 KASSERT(error >= 0, ("TCP stack %s requested tcp_drop(%p) at connect()" 735 ", error code %d", tp->t_fb->tfb_tcp_block_name, tp, -error)); 736 /* 737 * If the implicit bind in the connect call fails, restore 738 * the flags we modified. 739 */ 740 if (error != 0 && inp->inp_lport == 0) { 741 inp->inp_vflag = vflagsav; 742 inp->inp_inc.inc_flags = incflagsav; 743 } 744 745 TCPDEBUG2(PRU_CONNECT); 746 TCP_PROBE2(debug__user, tp, PRU_CONNECT); 747 INP_WUNLOCK(inp); 748 return (error); 749 } 750 #endif /* INET6 */ 751 752 /* 753 * Initiate disconnect from peer. 754 * If connection never passed embryonic stage, just drop; 755 * else if don't need to let data drain, then can just drop anyways, 756 * else have to begin TCP shutdown process: mark socket disconnecting, 757 * drain unread data, state switch to reflect user close, and 758 * send segment (e.g. FIN) to peer. Socket will be really disconnected 759 * when peer sends FIN and acks ours. 760 * 761 * SHOULD IMPLEMENT LATER PRU_CONNECT VIA REALLOC TCPCB. 762 */ 763 static int 764 tcp_usr_disconnect(struct socket *so) 765 { 766 struct inpcb *inp; 767 struct tcpcb *tp = NULL; 768 struct epoch_tracker et; 769 int error = 0; 770 771 TCPDEBUG0; 772 NET_EPOCH_ENTER(et); 773 inp = sotoinpcb(so); 774 KASSERT(inp != NULL, ("tcp_usr_disconnect: inp == NULL")); 775 INP_WLOCK(inp); 776 if (inp->inp_flags & INP_TIMEWAIT) 777 goto out; 778 if (inp->inp_flags & INP_DROPPED) { 779 error = ECONNRESET; 780 goto out; 781 } 782 tp = intotcpcb(inp); 783 TCPDEBUG1(); 784 tcp_disconnect(tp); 785 out: 786 TCPDEBUG2(PRU_DISCONNECT); 787 TCP_PROBE2(debug__user, tp, PRU_DISCONNECT); 788 INP_WUNLOCK(inp); 789 NET_EPOCH_EXIT(et); 790 return (error); 791 } 792 793 #ifdef INET 794 /* 795 * Accept a connection. Essentially all the work is done at higher levels; 796 * just return the address of the peer, storing through addr. 797 */ 798 static int 799 tcp_usr_accept(struct socket *so, struct sockaddr **nam) 800 { 801 int error = 0; 802 struct inpcb *inp = NULL; 803 #ifdef KDTRACE_HOOKS 804 struct tcpcb *tp = NULL; 805 #endif 806 struct in_addr addr; 807 in_port_t port = 0; 808 TCPDEBUG0; 809 810 if (so->so_state & SS_ISDISCONNECTED) 811 return (ECONNABORTED); 812 813 inp = sotoinpcb(so); 814 KASSERT(inp != NULL, ("tcp_usr_accept: inp == NULL")); 815 INP_WLOCK(inp); 816 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 817 error = ECONNABORTED; 818 goto out; 819 } 820 #ifdef KDTRACE_HOOKS 821 tp = intotcpcb(inp); 822 #endif 823 TCPDEBUG1(); 824 825 /* 826 * We inline in_getpeeraddr and COMMON_END here, so that we can 827 * copy the data of interest and defer the malloc until after we 828 * release the lock. 829 */ 830 port = inp->inp_fport; 831 addr = inp->inp_faddr; 832 833 out: 834 TCPDEBUG2(PRU_ACCEPT); 835 TCP_PROBE2(debug__user, tp, PRU_ACCEPT); 836 INP_WUNLOCK(inp); 837 if (error == 0) 838 *nam = in_sockaddr(port, &addr); 839 return error; 840 } 841 #endif /* INET */ 842 843 #ifdef INET6 844 static int 845 tcp6_usr_accept(struct socket *so, struct sockaddr **nam) 846 { 847 struct inpcb *inp = NULL; 848 int error = 0; 849 #ifdef KDTRACE_HOOKS 850 struct tcpcb *tp = NULL; 851 #endif 852 struct in_addr addr; 853 struct in6_addr addr6; 854 struct epoch_tracker et; 855 in_port_t port = 0; 856 int v4 = 0; 857 TCPDEBUG0; 858 859 if (so->so_state & SS_ISDISCONNECTED) 860 return (ECONNABORTED); 861 862 inp = sotoinpcb(so); 863 KASSERT(inp != NULL, ("tcp6_usr_accept: inp == NULL")); 864 NET_EPOCH_ENTER(et); 865 INP_WLOCK(inp); 866 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 867 error = ECONNABORTED; 868 goto out; 869 } 870 #ifdef KDTRACE_HOOKS 871 tp = intotcpcb(inp); 872 #endif 873 TCPDEBUG1(); 874 875 /* 876 * We inline in6_mapped_peeraddr and COMMON_END here, so that we can 877 * copy the data of interest and defer the malloc until after we 878 * release the lock. 879 */ 880 if (inp->inp_vflag & INP_IPV4) { 881 v4 = 1; 882 port = inp->inp_fport; 883 addr = inp->inp_faddr; 884 } else { 885 port = inp->inp_fport; 886 addr6 = inp->in6p_faddr; 887 } 888 889 out: 890 TCPDEBUG2(PRU_ACCEPT); 891 TCP_PROBE2(debug__user, tp, PRU_ACCEPT); 892 INP_WUNLOCK(inp); 893 NET_EPOCH_EXIT(et); 894 if (error == 0) { 895 if (v4) 896 *nam = in6_v4mapsin6_sockaddr(port, &addr); 897 else 898 *nam = in6_sockaddr(port, &addr6); 899 } 900 return error; 901 } 902 #endif /* INET6 */ 903 904 /* 905 * Mark the connection as being incapable of further output. 906 */ 907 static int 908 tcp_usr_shutdown(struct socket *so) 909 { 910 int error = 0; 911 struct inpcb *inp; 912 struct tcpcb *tp = NULL; 913 struct epoch_tracker et; 914 915 TCPDEBUG0; 916 inp = sotoinpcb(so); 917 KASSERT(inp != NULL, ("inp == NULL")); 918 INP_WLOCK(inp); 919 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 920 INP_WUNLOCK(inp); 921 return (ECONNRESET); 922 } 923 tp = intotcpcb(inp); 924 NET_EPOCH_ENTER(et); 925 TCPDEBUG1(); 926 socantsendmore(so); 927 tcp_usrclosed(tp); 928 if (!(inp->inp_flags & INP_DROPPED)) 929 error = tcp_output_nodrop(tp); 930 TCPDEBUG2(PRU_SHUTDOWN); 931 TCP_PROBE2(debug__user, tp, PRU_SHUTDOWN); 932 error = tcp_unlock_or_drop(tp, error); 933 NET_EPOCH_EXIT(et); 934 935 return (error); 936 } 937 938 /* 939 * After a receive, possibly send window update to peer. 940 */ 941 static int 942 tcp_usr_rcvd(struct socket *so, int flags) 943 { 944 struct epoch_tracker et; 945 struct inpcb *inp; 946 struct tcpcb *tp = NULL; 947 int outrv = 0, error = 0; 948 949 TCPDEBUG0; 950 inp = sotoinpcb(so); 951 KASSERT(inp != NULL, ("tcp_usr_rcvd: inp == NULL")); 952 INP_WLOCK(inp); 953 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 954 INP_WUNLOCK(inp); 955 return (ECONNRESET); 956 } 957 tp = intotcpcb(inp); 958 NET_EPOCH_ENTER(et); 959 TCPDEBUG1(); 960 /* 961 * For passively-created TFO connections, don't attempt a window 962 * update while still in SYN_RECEIVED as this may trigger an early 963 * SYN|ACK. It is preferable to have the SYN|ACK be sent along with 964 * application response data, or failing that, when the DELACK timer 965 * expires. 966 */ 967 if (IS_FASTOPEN(tp->t_flags) && 968 (tp->t_state == TCPS_SYN_RECEIVED)) 969 goto out; 970 #ifdef TCP_OFFLOAD 971 if (tp->t_flags & TF_TOE) 972 tcp_offload_rcvd(tp); 973 else 974 #endif 975 outrv = tcp_output_nodrop(tp); 976 out: 977 TCPDEBUG2(PRU_RCVD); 978 TCP_PROBE2(debug__user, tp, PRU_RCVD); 979 (void) tcp_unlock_or_drop(tp, outrv); 980 NET_EPOCH_EXIT(et); 981 return (error); 982 } 983 984 /* 985 * Do a send by putting data in output queue and updating urgent 986 * marker if URG set. Possibly send more data. Unlike the other 987 * pru_*() routines, the mbuf chains are our responsibility. We 988 * must either enqueue them or free them. The other pru_* routines 989 * generally are caller-frees. 990 */ 991 static int 992 tcp_usr_send(struct socket *so, int flags, struct mbuf *m, 993 struct sockaddr *nam, struct mbuf *control, struct thread *td) 994 { 995 struct epoch_tracker et; 996 int error = 0; 997 struct inpcb *inp; 998 struct tcpcb *tp = NULL; 999 #ifdef INET 1000 #ifdef INET6 1001 struct sockaddr_in sin; 1002 #endif 1003 struct sockaddr_in *sinp; 1004 #endif 1005 #ifdef INET6 1006 int isipv6; 1007 #endif 1008 u_int8_t incflagsav; 1009 u_char vflagsav; 1010 bool restoreflags; 1011 TCPDEBUG0; 1012 1013 if (control != NULL) { 1014 /* TCP doesn't do control messages (rights, creds, etc) */ 1015 if (control->m_len) { 1016 m_freem(control); 1017 return (EINVAL); 1018 } 1019 m_freem(control); /* empty control, just free it */ 1020 } 1021 1022 inp = sotoinpcb(so); 1023 KASSERT(inp != NULL, ("tcp_usr_send: inp == NULL")); 1024 INP_WLOCK(inp); 1025 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 1026 if (m != NULL && (flags & PRUS_NOTREADY) == 0) 1027 m_freem(m); 1028 INP_WUNLOCK(inp); 1029 return (ECONNRESET); 1030 } 1031 1032 vflagsav = inp->inp_vflag; 1033 incflagsav = inp->inp_inc.inc_flags; 1034 restoreflags = false; 1035 tp = intotcpcb(inp); 1036 1037 NET_EPOCH_ENTER(et); 1038 if ((flags & PRUS_OOB) != 0 && 1039 (error = tcp_pru_options_support(tp, PRUS_OOB)) != 0) 1040 goto out; 1041 1042 TCPDEBUG1(); 1043 if (nam != NULL && tp->t_state < TCPS_SYN_SENT) { 1044 if (tp->t_state == TCPS_LISTEN) { 1045 error = EINVAL; 1046 goto out; 1047 } 1048 switch (nam->sa_family) { 1049 #ifdef INET 1050 case AF_INET: 1051 sinp = (struct sockaddr_in *)nam; 1052 if (sinp->sin_len != sizeof(struct sockaddr_in)) { 1053 error = EINVAL; 1054 goto out; 1055 } 1056 if ((inp->inp_vflag & INP_IPV6) != 0) { 1057 error = EAFNOSUPPORT; 1058 goto out; 1059 } 1060 if (IN_MULTICAST(ntohl(sinp->sin_addr.s_addr))) { 1061 error = EAFNOSUPPORT; 1062 goto out; 1063 } 1064 if (ntohl(sinp->sin_addr.s_addr) == INADDR_BROADCAST) { 1065 error = EACCES; 1066 goto out; 1067 } 1068 if ((error = prison_remote_ip4(td->td_ucred, 1069 &sinp->sin_addr))) 1070 goto out; 1071 #ifdef INET6 1072 isipv6 = 0; 1073 #endif 1074 break; 1075 #endif /* INET */ 1076 #ifdef INET6 1077 case AF_INET6: 1078 { 1079 struct sockaddr_in6 *sin6; 1080 1081 sin6 = (struct sockaddr_in6 *)nam; 1082 if (sin6->sin6_len != sizeof(*sin6)) { 1083 error = EINVAL; 1084 goto out; 1085 } 1086 if ((inp->inp_vflag & INP_IPV6PROTO) == 0) { 1087 error = EAFNOSUPPORT; 1088 goto out; 1089 } 1090 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 1091 error = EAFNOSUPPORT; 1092 goto out; 1093 } 1094 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 1095 #ifdef INET 1096 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0) { 1097 error = EINVAL; 1098 goto out; 1099 } 1100 if ((inp->inp_vflag & INP_IPV4) == 0) { 1101 error = EAFNOSUPPORT; 1102 goto out; 1103 } 1104 restoreflags = true; 1105 inp->inp_vflag &= ~INP_IPV6; 1106 sinp = &sin; 1107 in6_sin6_2_sin(sinp, sin6); 1108 if (IN_MULTICAST( 1109 ntohl(sinp->sin_addr.s_addr))) { 1110 error = EAFNOSUPPORT; 1111 goto out; 1112 } 1113 if ((error = prison_remote_ip4(td->td_ucred, 1114 &sinp->sin_addr))) 1115 goto out; 1116 isipv6 = 0; 1117 #else /* !INET */ 1118 error = EAFNOSUPPORT; 1119 goto out; 1120 #endif /* INET */ 1121 } else { 1122 if ((inp->inp_vflag & INP_IPV6) == 0) { 1123 error = EAFNOSUPPORT; 1124 goto out; 1125 } 1126 restoreflags = true; 1127 inp->inp_vflag &= ~INP_IPV4; 1128 inp->inp_inc.inc_flags |= INC_ISIPV6; 1129 if ((error = prison_remote_ip6(td->td_ucred, 1130 &sin6->sin6_addr))) 1131 goto out; 1132 isipv6 = 1; 1133 } 1134 break; 1135 } 1136 #endif /* INET6 */ 1137 default: 1138 error = EAFNOSUPPORT; 1139 goto out; 1140 } 1141 } 1142 if (!(flags & PRUS_OOB)) { 1143 sbappendstream(&so->so_snd, m, flags); 1144 m = NULL; 1145 if (nam && tp->t_state < TCPS_SYN_SENT) { 1146 KASSERT(tp->t_state == TCPS_CLOSED, 1147 ("%s: tp %p is listening", __func__, tp)); 1148 1149 /* 1150 * Do implied connect if not yet connected, 1151 * initialize window to default value, and 1152 * initialize maxseg using peer's cached MSS. 1153 */ 1154 #ifdef INET6 1155 if (isipv6) 1156 error = tcp6_connect(tp, nam, td); 1157 #endif /* INET6 */ 1158 #if defined(INET6) && defined(INET) 1159 else 1160 #endif 1161 #ifdef INET 1162 error = tcp_connect(tp, 1163 (struct sockaddr *)sinp, td); 1164 #endif 1165 /* 1166 * The bind operation in tcp_connect succeeded. We 1167 * no longer want to restore the flags if later 1168 * operations fail. 1169 */ 1170 if (error == 0 || inp->inp_lport != 0) 1171 restoreflags = false; 1172 1173 if (error) { 1174 /* m is freed if PRUS_NOTREADY is unset. */ 1175 sbflush(&so->so_snd); 1176 goto out; 1177 } 1178 if (IS_FASTOPEN(tp->t_flags)) 1179 tcp_fastopen_connect(tp); 1180 else { 1181 tp->snd_wnd = TTCP_CLIENT_SND_WND; 1182 tcp_mss(tp, -1); 1183 } 1184 } 1185 if (flags & PRUS_EOF) { 1186 /* 1187 * Close the send side of the connection after 1188 * the data is sent. 1189 */ 1190 socantsendmore(so); 1191 tcp_usrclosed(tp); 1192 } 1193 if (TCPS_HAVEESTABLISHED(tp->t_state) && 1194 ((tp->t_flags2 & TF2_FBYTES_COMPLETE) == 0) && 1195 (tp->t_fbyte_out == 0) && 1196 (so->so_snd.sb_ccc > 0)) { 1197 tp->t_fbyte_out = ticks; 1198 if (tp->t_fbyte_out == 0) 1199 tp->t_fbyte_out = 1; 1200 if (tp->t_fbyte_out && tp->t_fbyte_in) 1201 tp->t_flags2 |= TF2_FBYTES_COMPLETE; 1202 } 1203 if (!(inp->inp_flags & INP_DROPPED) && 1204 !(flags & PRUS_NOTREADY)) { 1205 if (flags & PRUS_MORETOCOME) 1206 tp->t_flags |= TF_MORETOCOME; 1207 error = tcp_output_nodrop(tp); 1208 if (flags & PRUS_MORETOCOME) 1209 tp->t_flags &= ~TF_MORETOCOME; 1210 } 1211 } else { 1212 /* 1213 * XXXRW: PRUS_EOF not implemented with PRUS_OOB? 1214 */ 1215 SOCKBUF_LOCK(&so->so_snd); 1216 if (sbspace(&so->so_snd) < -512) { 1217 SOCKBUF_UNLOCK(&so->so_snd); 1218 error = ENOBUFS; 1219 goto out; 1220 } 1221 /* 1222 * According to RFC961 (Assigned Protocols), 1223 * the urgent pointer points to the last octet 1224 * of urgent data. We continue, however, 1225 * to consider it to indicate the first octet 1226 * of data past the urgent section. 1227 * Otherwise, snd_up should be one lower. 1228 */ 1229 sbappendstream_locked(&so->so_snd, m, flags); 1230 SOCKBUF_UNLOCK(&so->so_snd); 1231 m = NULL; 1232 if (nam && tp->t_state < TCPS_SYN_SENT) { 1233 /* 1234 * Do implied connect if not yet connected, 1235 * initialize window to default value, and 1236 * initialize maxseg using peer's cached MSS. 1237 */ 1238 1239 /* 1240 * Not going to contemplate SYN|URG 1241 */ 1242 if (IS_FASTOPEN(tp->t_flags)) 1243 tp->t_flags &= ~TF_FASTOPEN; 1244 #ifdef INET6 1245 if (isipv6) 1246 error = tcp6_connect(tp, nam, td); 1247 #endif /* INET6 */ 1248 #if defined(INET6) && defined(INET) 1249 else 1250 #endif 1251 #ifdef INET 1252 error = tcp_connect(tp, 1253 (struct sockaddr *)sinp, td); 1254 #endif 1255 /* 1256 * The bind operation in tcp_connect succeeded. We 1257 * no longer want to restore the flags if later 1258 * operations fail. 1259 */ 1260 if (error == 0 || inp->inp_lport != 0) 1261 restoreflags = false; 1262 1263 if (error != 0) { 1264 /* m is freed if PRUS_NOTREADY is unset. */ 1265 sbflush(&so->so_snd); 1266 goto out; 1267 } 1268 tp->snd_wnd = TTCP_CLIENT_SND_WND; 1269 tcp_mss(tp, -1); 1270 } 1271 tp->snd_up = tp->snd_una + sbavail(&so->so_snd); 1272 if ((flags & PRUS_NOTREADY) == 0) { 1273 tp->t_flags |= TF_FORCEDATA; 1274 error = tcp_output_nodrop(tp); 1275 tp->t_flags &= ~TF_FORCEDATA; 1276 } 1277 } 1278 TCP_LOG_EVENT(tp, NULL, 1279 &inp->inp_socket->so_rcv, 1280 &inp->inp_socket->so_snd, 1281 TCP_LOG_USERSEND, error, 1282 0, NULL, false); 1283 1284 out: 1285 /* 1286 * In case of PRUS_NOTREADY, the caller or tcp_usr_ready() is 1287 * responsible for freeing memory. 1288 */ 1289 if (m != NULL && (flags & PRUS_NOTREADY) == 0) 1290 m_freem(m); 1291 1292 /* 1293 * If the request was unsuccessful and we changed flags, 1294 * restore the original flags. 1295 */ 1296 if (error != 0 && restoreflags) { 1297 inp->inp_vflag = vflagsav; 1298 inp->inp_inc.inc_flags = incflagsav; 1299 } 1300 TCPDEBUG2((flags & PRUS_OOB) ? PRU_SENDOOB : 1301 ((flags & PRUS_EOF) ? PRU_SEND_EOF : PRU_SEND)); 1302 TCP_PROBE2(debug__user, tp, (flags & PRUS_OOB) ? PRU_SENDOOB : 1303 ((flags & PRUS_EOF) ? PRU_SEND_EOF : PRU_SEND)); 1304 error = tcp_unlock_or_drop(tp, error); 1305 NET_EPOCH_EXIT(et); 1306 return (error); 1307 } 1308 1309 static int 1310 tcp_usr_ready(struct socket *so, struct mbuf *m, int count) 1311 { 1312 struct epoch_tracker et; 1313 struct inpcb *inp; 1314 struct tcpcb *tp; 1315 int error; 1316 1317 inp = sotoinpcb(so); 1318 INP_WLOCK(inp); 1319 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 1320 INP_WUNLOCK(inp); 1321 mb_free_notready(m, count); 1322 return (ECONNRESET); 1323 } 1324 tp = intotcpcb(inp); 1325 1326 SOCKBUF_LOCK(&so->so_snd); 1327 error = sbready(&so->so_snd, m, count); 1328 SOCKBUF_UNLOCK(&so->so_snd); 1329 if (error) { 1330 INP_WUNLOCK(inp); 1331 return (error); 1332 } 1333 NET_EPOCH_ENTER(et); 1334 error = tcp_output_unlock(tp); 1335 NET_EPOCH_EXIT(et); 1336 1337 return (error); 1338 } 1339 1340 /* 1341 * Abort the TCP. Drop the connection abruptly. 1342 */ 1343 static void 1344 tcp_usr_abort(struct socket *so) 1345 { 1346 struct inpcb *inp; 1347 struct tcpcb *tp = NULL; 1348 struct epoch_tracker et; 1349 TCPDEBUG0; 1350 1351 inp = sotoinpcb(so); 1352 KASSERT(inp != NULL, ("tcp_usr_abort: inp == NULL")); 1353 1354 NET_EPOCH_ENTER(et); 1355 INP_WLOCK(inp); 1356 KASSERT(inp->inp_socket != NULL, 1357 ("tcp_usr_abort: inp_socket == NULL")); 1358 1359 /* 1360 * If we still have full TCP state, and we're not dropped, drop. 1361 */ 1362 if (!(inp->inp_flags & INP_TIMEWAIT) && 1363 !(inp->inp_flags & INP_DROPPED)) { 1364 tp = intotcpcb(inp); 1365 TCPDEBUG1(); 1366 tp = tcp_drop(tp, ECONNABORTED); 1367 if (tp == NULL) 1368 goto dropped; 1369 TCPDEBUG2(PRU_ABORT); 1370 TCP_PROBE2(debug__user, tp, PRU_ABORT); 1371 } 1372 if (!(inp->inp_flags & INP_DROPPED)) { 1373 soref(so); 1374 inp->inp_flags |= INP_SOCKREF; 1375 } 1376 INP_WUNLOCK(inp); 1377 dropped: 1378 NET_EPOCH_EXIT(et); 1379 } 1380 1381 /* 1382 * TCP socket is closed. Start friendly disconnect. 1383 */ 1384 static void 1385 tcp_usr_close(struct socket *so) 1386 { 1387 struct inpcb *inp; 1388 struct tcpcb *tp = NULL; 1389 struct epoch_tracker et; 1390 TCPDEBUG0; 1391 1392 inp = sotoinpcb(so); 1393 KASSERT(inp != NULL, ("tcp_usr_close: inp == NULL")); 1394 1395 NET_EPOCH_ENTER(et); 1396 INP_WLOCK(inp); 1397 KASSERT(inp->inp_socket != NULL, 1398 ("tcp_usr_close: inp_socket == NULL")); 1399 1400 /* 1401 * If we still have full TCP state, and we're not dropped, initiate 1402 * a disconnect. 1403 */ 1404 if (!(inp->inp_flags & INP_TIMEWAIT) && 1405 !(inp->inp_flags & INP_DROPPED)) { 1406 tp = intotcpcb(inp); 1407 tp->t_flags |= TF_CLOSED; 1408 TCPDEBUG1(); 1409 tcp_disconnect(tp); 1410 TCPDEBUG2(PRU_CLOSE); 1411 TCP_PROBE2(debug__user, tp, PRU_CLOSE); 1412 } 1413 if (!(inp->inp_flags & INP_DROPPED)) { 1414 soref(so); 1415 inp->inp_flags |= INP_SOCKREF; 1416 } 1417 INP_WUNLOCK(inp); 1418 NET_EPOCH_EXIT(et); 1419 } 1420 1421 static int 1422 tcp_pru_options_support(struct tcpcb *tp, int flags) 1423 { 1424 /* 1425 * If the specific TCP stack has a pru_options 1426 * specified then it does not always support 1427 * all the PRU_XX options and we must ask it. 1428 * If the function is not specified then all 1429 * of the PRU_XX options are supported. 1430 */ 1431 int ret = 0; 1432 1433 if (tp->t_fb->tfb_pru_options) { 1434 ret = (*tp->t_fb->tfb_pru_options)(tp, flags); 1435 } 1436 return (ret); 1437 } 1438 1439 /* 1440 * Receive out-of-band data. 1441 */ 1442 static int 1443 tcp_usr_rcvoob(struct socket *so, struct mbuf *m, int flags) 1444 { 1445 int error = 0; 1446 struct inpcb *inp; 1447 struct tcpcb *tp = NULL; 1448 1449 TCPDEBUG0; 1450 inp = sotoinpcb(so); 1451 KASSERT(inp != NULL, ("tcp_usr_rcvoob: inp == NULL")); 1452 INP_WLOCK(inp); 1453 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 1454 error = ECONNRESET; 1455 goto out; 1456 } 1457 tp = intotcpcb(inp); 1458 error = tcp_pru_options_support(tp, PRUS_OOB); 1459 if (error) { 1460 goto out; 1461 } 1462 TCPDEBUG1(); 1463 if ((so->so_oobmark == 0 && 1464 (so->so_rcv.sb_state & SBS_RCVATMARK) == 0) || 1465 so->so_options & SO_OOBINLINE || 1466 tp->t_oobflags & TCPOOB_HADDATA) { 1467 error = EINVAL; 1468 goto out; 1469 } 1470 if ((tp->t_oobflags & TCPOOB_HAVEDATA) == 0) { 1471 error = EWOULDBLOCK; 1472 goto out; 1473 } 1474 m->m_len = 1; 1475 *mtod(m, caddr_t) = tp->t_iobc; 1476 if ((flags & MSG_PEEK) == 0) 1477 tp->t_oobflags ^= (TCPOOB_HAVEDATA | TCPOOB_HADDATA); 1478 1479 out: 1480 TCPDEBUG2(PRU_RCVOOB); 1481 TCP_PROBE2(debug__user, tp, PRU_RCVOOB); 1482 INP_WUNLOCK(inp); 1483 return (error); 1484 } 1485 1486 #ifdef INET 1487 struct pr_usrreqs tcp_usrreqs = { 1488 .pru_abort = tcp_usr_abort, 1489 .pru_accept = tcp_usr_accept, 1490 .pru_attach = tcp_usr_attach, 1491 .pru_bind = tcp_usr_bind, 1492 .pru_connect = tcp_usr_connect, 1493 .pru_control = in_control, 1494 .pru_detach = tcp_usr_detach, 1495 .pru_disconnect = tcp_usr_disconnect, 1496 .pru_listen = tcp_usr_listen, 1497 .pru_peeraddr = in_getpeeraddr, 1498 .pru_rcvd = tcp_usr_rcvd, 1499 .pru_rcvoob = tcp_usr_rcvoob, 1500 .pru_send = tcp_usr_send, 1501 .pru_ready = tcp_usr_ready, 1502 .pru_shutdown = tcp_usr_shutdown, 1503 .pru_sockaddr = in_getsockaddr, 1504 .pru_sosetlabel = in_pcbsosetlabel, 1505 .pru_close = tcp_usr_close, 1506 }; 1507 #endif /* INET */ 1508 1509 #ifdef INET6 1510 struct pr_usrreqs tcp6_usrreqs = { 1511 .pru_abort = tcp_usr_abort, 1512 .pru_accept = tcp6_usr_accept, 1513 .pru_attach = tcp_usr_attach, 1514 .pru_bind = tcp6_usr_bind, 1515 .pru_connect = tcp6_usr_connect, 1516 .pru_control = in6_control, 1517 .pru_detach = tcp_usr_detach, 1518 .pru_disconnect = tcp_usr_disconnect, 1519 .pru_listen = tcp6_usr_listen, 1520 .pru_peeraddr = in6_mapped_peeraddr, 1521 .pru_rcvd = tcp_usr_rcvd, 1522 .pru_rcvoob = tcp_usr_rcvoob, 1523 .pru_send = tcp_usr_send, 1524 .pru_ready = tcp_usr_ready, 1525 .pru_shutdown = tcp_usr_shutdown, 1526 .pru_sockaddr = in6_mapped_sockaddr, 1527 .pru_sosetlabel = in_pcbsosetlabel, 1528 .pru_close = tcp_usr_close, 1529 }; 1530 #endif /* INET6 */ 1531 1532 #ifdef INET 1533 /* 1534 * Common subroutine to open a TCP connection to remote host specified 1535 * by struct sockaddr_in in mbuf *nam. Call in_pcbbind to assign a local 1536 * port number if needed. Call in_pcbconnect_setup to do the routing and 1537 * to choose a local host address (interface). If there is an existing 1538 * incarnation of the same connection in TIME-WAIT state and if the remote 1539 * host was sending CC options and if the connection duration was < MSL, then 1540 * truncate the previous TIME-WAIT state and proceed. 1541 * Initialize connection parameters and enter SYN-SENT state. 1542 */ 1543 static int 1544 tcp_connect(struct tcpcb *tp, struct sockaddr *nam, struct thread *td) 1545 { 1546 struct inpcb *inp = tp->t_inpcb, *oinp; 1547 struct socket *so = inp->inp_socket; 1548 struct in_addr laddr; 1549 u_short lport; 1550 int error; 1551 1552 NET_EPOCH_ASSERT(); 1553 INP_WLOCK_ASSERT(inp); 1554 INP_HASH_WLOCK(&V_tcbinfo); 1555 1556 if (V_tcp_require_unique_port && inp->inp_lport == 0) { 1557 error = in_pcbbind(inp, (struct sockaddr *)0, td->td_ucred); 1558 if (error) 1559 goto out; 1560 } 1561 1562 /* 1563 * Cannot simply call in_pcbconnect, because there might be an 1564 * earlier incarnation of this same connection still in 1565 * TIME_WAIT state, creating an ADDRINUSE error. 1566 */ 1567 laddr = inp->inp_laddr; 1568 lport = inp->inp_lport; 1569 error = in_pcbconnect_setup(inp, nam, &laddr.s_addr, &lport, 1570 &inp->inp_faddr.s_addr, &inp->inp_fport, &oinp, td->td_ucred); 1571 if (error && oinp == NULL) 1572 goto out; 1573 if (oinp) { 1574 error = EADDRINUSE; 1575 goto out; 1576 } 1577 /* Handle initial bind if it hadn't been done in advance. */ 1578 if (inp->inp_lport == 0) { 1579 inp->inp_lport = lport; 1580 if (in_pcbinshash(inp) != 0) { 1581 inp->inp_lport = 0; 1582 error = EAGAIN; 1583 goto out; 1584 } 1585 } 1586 inp->inp_laddr = laddr; 1587 in_pcbrehash(inp); 1588 INP_HASH_WUNLOCK(&V_tcbinfo); 1589 1590 /* 1591 * Compute window scaling to request: 1592 * Scale to fit into sweet spot. See tcp_syncache.c. 1593 * XXX: This should move to tcp_output(). 1594 */ 1595 while (tp->request_r_scale < TCP_MAX_WINSHIFT && 1596 (TCP_MAXWIN << tp->request_r_scale) < sb_max) 1597 tp->request_r_scale++; 1598 1599 soisconnecting(so); 1600 TCPSTAT_INC(tcps_connattempt); 1601 tcp_state_change(tp, TCPS_SYN_SENT); 1602 tp->iss = tcp_new_isn(&inp->inp_inc); 1603 if (tp->t_flags & TF_REQ_TSTMP) 1604 tp->ts_offset = tcp_new_ts_offset(&inp->inp_inc); 1605 tcp_sendseqinit(tp); 1606 1607 return 0; 1608 1609 out: 1610 INP_HASH_WUNLOCK(&V_tcbinfo); 1611 return (error); 1612 } 1613 #endif /* INET */ 1614 1615 #ifdef INET6 1616 static int 1617 tcp6_connect(struct tcpcb *tp, struct sockaddr *nam, struct thread *td) 1618 { 1619 struct inpcb *inp = tp->t_inpcb; 1620 int error; 1621 1622 INP_WLOCK_ASSERT(inp); 1623 INP_HASH_WLOCK(&V_tcbinfo); 1624 1625 if (V_tcp_require_unique_port && inp->inp_lport == 0) { 1626 error = in6_pcbbind(inp, (struct sockaddr *)0, td->td_ucred); 1627 if (error) 1628 goto out; 1629 } 1630 error = in6_pcbconnect(inp, nam, td->td_ucred); 1631 if (error != 0) 1632 goto out; 1633 INP_HASH_WUNLOCK(&V_tcbinfo); 1634 1635 /* Compute window scaling to request. */ 1636 while (tp->request_r_scale < TCP_MAX_WINSHIFT && 1637 (TCP_MAXWIN << tp->request_r_scale) < sb_max) 1638 tp->request_r_scale++; 1639 1640 soisconnecting(inp->inp_socket); 1641 TCPSTAT_INC(tcps_connattempt); 1642 tcp_state_change(tp, TCPS_SYN_SENT); 1643 tp->iss = tcp_new_isn(&inp->inp_inc); 1644 if (tp->t_flags & TF_REQ_TSTMP) 1645 tp->ts_offset = tcp_new_ts_offset(&inp->inp_inc); 1646 tcp_sendseqinit(tp); 1647 1648 return 0; 1649 1650 out: 1651 INP_HASH_WUNLOCK(&V_tcbinfo); 1652 return error; 1653 } 1654 #endif /* INET6 */ 1655 1656 /* 1657 * Export TCP internal state information via a struct tcp_info, based on the 1658 * Linux 2.6 API. Not ABI compatible as our constants are mapped differently 1659 * (TCP state machine, etc). We export all information using FreeBSD-native 1660 * constants -- for example, the numeric values for tcpi_state will differ 1661 * from Linux. 1662 */ 1663 static void 1664 tcp_fill_info(struct tcpcb *tp, struct tcp_info *ti) 1665 { 1666 1667 INP_WLOCK_ASSERT(tp->t_inpcb); 1668 bzero(ti, sizeof(*ti)); 1669 1670 ti->tcpi_state = tp->t_state; 1671 if ((tp->t_flags & TF_REQ_TSTMP) && (tp->t_flags & TF_RCVD_TSTMP)) 1672 ti->tcpi_options |= TCPI_OPT_TIMESTAMPS; 1673 if (tp->t_flags & TF_SACK_PERMIT) 1674 ti->tcpi_options |= TCPI_OPT_SACK; 1675 if ((tp->t_flags & TF_REQ_SCALE) && (tp->t_flags & TF_RCVD_SCALE)) { 1676 ti->tcpi_options |= TCPI_OPT_WSCALE; 1677 ti->tcpi_snd_wscale = tp->snd_scale; 1678 ti->tcpi_rcv_wscale = tp->rcv_scale; 1679 } 1680 if (tp->t_flags2 & (TF2_ECN_PERMIT | TF2_ACE_PERMIT)) 1681 ti->tcpi_options |= TCPI_OPT_ECN; 1682 1683 ti->tcpi_rto = tp->t_rxtcur * tick; 1684 ti->tcpi_last_data_recv = ((uint32_t)ticks - tp->t_rcvtime) * tick; 1685 ti->tcpi_rtt = ((u_int64_t)tp->t_srtt * tick) >> TCP_RTT_SHIFT; 1686 ti->tcpi_rttvar = ((u_int64_t)tp->t_rttvar * tick) >> TCP_RTTVAR_SHIFT; 1687 1688 ti->tcpi_snd_ssthresh = tp->snd_ssthresh; 1689 ti->tcpi_snd_cwnd = tp->snd_cwnd; 1690 1691 /* 1692 * FreeBSD-specific extension fields for tcp_info. 1693 */ 1694 ti->tcpi_rcv_space = tp->rcv_wnd; 1695 ti->tcpi_rcv_nxt = tp->rcv_nxt; 1696 ti->tcpi_snd_wnd = tp->snd_wnd; 1697 ti->tcpi_snd_bwnd = 0; /* Unused, kept for compat. */ 1698 ti->tcpi_snd_nxt = tp->snd_nxt; 1699 ti->tcpi_snd_mss = tp->t_maxseg; 1700 ti->tcpi_rcv_mss = tp->t_maxseg; 1701 ti->tcpi_snd_rexmitpack = tp->t_sndrexmitpack; 1702 ti->tcpi_rcv_ooopack = tp->t_rcvoopack; 1703 ti->tcpi_snd_zerowin = tp->t_sndzerowin; 1704 #ifdef TCP_OFFLOAD 1705 if (tp->t_flags & TF_TOE) { 1706 ti->tcpi_options |= TCPI_OPT_TOE; 1707 tcp_offload_tcp_info(tp, ti); 1708 } 1709 #endif 1710 } 1711 1712 /* 1713 * tcp_ctloutput() must drop the inpcb lock before performing copyin on 1714 * socket option arguments. When it re-acquires the lock after the copy, it 1715 * has to revalidate that the connection is still valid for the socket 1716 * option. 1717 */ 1718 #define INP_WLOCK_RECHECK_CLEANUP(inp, cleanup) do { \ 1719 INP_WLOCK(inp); \ 1720 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { \ 1721 INP_WUNLOCK(inp); \ 1722 cleanup; \ 1723 return (ECONNRESET); \ 1724 } \ 1725 tp = intotcpcb(inp); \ 1726 } while(0) 1727 #define INP_WLOCK_RECHECK(inp) INP_WLOCK_RECHECK_CLEANUP((inp), /* noop */) 1728 1729 int 1730 tcp_ctloutput_set(struct inpcb *inp, struct sockopt *sopt) 1731 { 1732 struct socket *so = inp->inp_socket; 1733 struct tcpcb *tp = intotcpcb(inp); 1734 int error = 0; 1735 1736 MPASS(sopt->sopt_dir == SOPT_SET); 1737 INP_WLOCK_ASSERT(inp); 1738 KASSERT((inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) == 0, 1739 ("inp_flags == %x", inp->inp_flags)); 1740 KASSERT(so != NULL, ("inp_socket == NULL")); 1741 1742 if (sopt->sopt_level != IPPROTO_TCP) { 1743 INP_WUNLOCK(inp); 1744 #ifdef INET6 1745 if (inp->inp_vflag & INP_IPV6PROTO) 1746 error = ip6_ctloutput(so, sopt); 1747 #endif 1748 #if defined(INET6) && defined(INET) 1749 else 1750 #endif 1751 #ifdef INET 1752 error = ip_ctloutput(so, sopt); 1753 #endif 1754 /* 1755 * When an IP-level socket option affects TCP, pass control 1756 * down to stack tfb_tcp_ctloutput, otherwise return what 1757 * IP level returned. 1758 */ 1759 switch (sopt->sopt_level) { 1760 #ifdef INET6 1761 case IPPROTO_IPV6: 1762 if ((inp->inp_vflag & INP_IPV6PROTO) == 0) 1763 return (error); 1764 switch (sopt->sopt_name) { 1765 case IPV6_TCLASS: 1766 /* Notify tcp stacks that care (e.g. RACK). */ 1767 break; 1768 case IPV6_USE_MIN_MTU: 1769 /* Update t_maxseg accordingly. */ 1770 break; 1771 default: 1772 return (error); 1773 } 1774 break; 1775 #endif 1776 #ifdef INET 1777 case IPPROTO_IP: 1778 switch (sopt->sopt_name) { 1779 case IP_TOS: 1780 inp->inp_ip_tos &= ~IPTOS_ECN_MASK; 1781 break; 1782 case IP_TTL: 1783 /* Notify tcp stacks that care (e.g. RACK). */ 1784 break; 1785 default: 1786 return (error); 1787 } 1788 break; 1789 #endif 1790 default: 1791 return (error); 1792 } 1793 INP_WLOCK(inp); 1794 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 1795 INP_WUNLOCK(inp); 1796 return (ECONNRESET); 1797 } 1798 } else if (sopt->sopt_name == TCP_FUNCTION_BLK) { 1799 /* 1800 * Protect the TCP option TCP_FUNCTION_BLK so 1801 * that a sub-function can *never* overwrite this. 1802 */ 1803 struct tcp_function_set fsn; 1804 struct tcp_function_block *blk; 1805 1806 INP_WUNLOCK(inp); 1807 error = sooptcopyin(sopt, &fsn, sizeof fsn, sizeof fsn); 1808 if (error) 1809 return (error); 1810 1811 INP_WLOCK(inp); 1812 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 1813 INP_WUNLOCK(inp); 1814 return (ECONNRESET); 1815 } 1816 tp = intotcpcb(inp); 1817 1818 blk = find_and_ref_tcp_functions(&fsn); 1819 if (blk == NULL) { 1820 INP_WUNLOCK(inp); 1821 return (ENOENT); 1822 } 1823 if (tp->t_fb == blk) { 1824 /* You already have this */ 1825 refcount_release(&blk->tfb_refcnt); 1826 INP_WUNLOCK(inp); 1827 return (0); 1828 } 1829 if (tp->t_state != TCPS_CLOSED) { 1830 /* 1831 * The user has advanced the state 1832 * past the initial point, we may not 1833 * be able to switch. 1834 */ 1835 if (blk->tfb_tcp_handoff_ok != NULL) { 1836 /* 1837 * Does the stack provide a 1838 * query mechanism, if so it may 1839 * still be possible? 1840 */ 1841 error = (*blk->tfb_tcp_handoff_ok)(tp); 1842 } else 1843 error = EINVAL; 1844 if (error) { 1845 refcount_release(&blk->tfb_refcnt); 1846 INP_WUNLOCK(inp); 1847 return(error); 1848 } 1849 } 1850 if (blk->tfb_flags & TCP_FUNC_BEING_REMOVED) { 1851 refcount_release(&blk->tfb_refcnt); 1852 INP_WUNLOCK(inp); 1853 return (ENOENT); 1854 } 1855 /* 1856 * Release the old refcnt, the 1857 * lookup acquired a ref on the 1858 * new one already. 1859 */ 1860 if (tp->t_fb->tfb_tcp_fb_fini) { 1861 struct epoch_tracker et; 1862 /* 1863 * Tell the stack to cleanup with 0 i.e. 1864 * the tcb is not going away. 1865 */ 1866 NET_EPOCH_ENTER(et); 1867 (*tp->t_fb->tfb_tcp_fb_fini)(tp, 0); 1868 NET_EPOCH_EXIT(et); 1869 } 1870 #ifdef TCPHPTS 1871 /* Assure that we are not on any hpts */ 1872 tcp_hpts_remove(tp->t_inpcb); 1873 #endif 1874 if (blk->tfb_tcp_fb_init) { 1875 error = (*blk->tfb_tcp_fb_init)(tp); 1876 if (error) { 1877 refcount_release(&blk->tfb_refcnt); 1878 if (tp->t_fb->tfb_tcp_fb_init) { 1879 if((*tp->t_fb->tfb_tcp_fb_init)(tp) != 0) { 1880 /* Fall back failed, drop the connection */ 1881 INP_WUNLOCK(inp); 1882 soabort(so); 1883 return (error); 1884 } 1885 } 1886 goto err_out; 1887 } 1888 } 1889 refcount_release(&tp->t_fb->tfb_refcnt); 1890 tp->t_fb = blk; 1891 #ifdef TCP_OFFLOAD 1892 if (tp->t_flags & TF_TOE) { 1893 tcp_offload_ctloutput(tp, sopt->sopt_dir, 1894 sopt->sopt_name); 1895 } 1896 #endif 1897 err_out: 1898 INP_WUNLOCK(inp); 1899 return (error); 1900 } 1901 1902 /* Pass in the INP locked, callee must unlock it. */ 1903 return (tp->t_fb->tfb_tcp_ctloutput(inp, sopt)); 1904 } 1905 1906 static int 1907 tcp_ctloutput_get(struct inpcb *inp, struct sockopt *sopt) 1908 { 1909 struct socket *so = inp->inp_socket; 1910 struct tcpcb *tp = intotcpcb(inp); 1911 int error = 0; 1912 1913 MPASS(sopt->sopt_dir == SOPT_GET); 1914 INP_WLOCK_ASSERT(inp); 1915 KASSERT((inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) == 0, 1916 ("inp_flags == %x", inp->inp_flags)); 1917 KASSERT(so != NULL, ("inp_socket == NULL")); 1918 1919 if (sopt->sopt_level != IPPROTO_TCP) { 1920 INP_WUNLOCK(inp); 1921 #ifdef INET6 1922 if (inp->inp_vflag & INP_IPV6PROTO) 1923 error = ip6_ctloutput(so, sopt); 1924 #endif /* INET6 */ 1925 #if defined(INET6) && defined(INET) 1926 else 1927 #endif 1928 #ifdef INET 1929 error = ip_ctloutput(so, sopt); 1930 #endif 1931 return (error); 1932 } 1933 if (((sopt->sopt_name == TCP_FUNCTION_BLK) || 1934 (sopt->sopt_name == TCP_FUNCTION_ALIAS))) { 1935 struct tcp_function_set fsn; 1936 1937 if (sopt->sopt_name == TCP_FUNCTION_ALIAS) { 1938 memset(&fsn, 0, sizeof(fsn)); 1939 find_tcp_function_alias(tp->t_fb, &fsn); 1940 } else { 1941 strncpy(fsn.function_set_name, 1942 tp->t_fb->tfb_tcp_block_name, 1943 TCP_FUNCTION_NAME_LEN_MAX); 1944 fsn.function_set_name[TCP_FUNCTION_NAME_LEN_MAX - 1] = '\0'; 1945 } 1946 fsn.pcbcnt = tp->t_fb->tfb_refcnt; 1947 INP_WUNLOCK(inp); 1948 error = sooptcopyout(sopt, &fsn, sizeof fsn); 1949 return (error); 1950 } 1951 1952 /* Pass in the INP locked, callee must unlock it. */ 1953 return (tp->t_fb->tfb_tcp_ctloutput(inp, sopt)); 1954 } 1955 1956 int 1957 tcp_ctloutput(struct socket *so, struct sockopt *sopt) 1958 { 1959 struct inpcb *inp; 1960 1961 inp = sotoinpcb(so); 1962 KASSERT(inp != NULL, ("tcp_ctloutput: inp == NULL")); 1963 1964 INP_WLOCK(inp); 1965 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 1966 INP_WUNLOCK(inp); 1967 return (ECONNRESET); 1968 } 1969 if (sopt->sopt_dir == SOPT_SET) 1970 return (tcp_ctloutput_set(inp, sopt)); 1971 else if (sopt->sopt_dir == SOPT_GET) 1972 return (tcp_ctloutput_get(inp, sopt)); 1973 else 1974 panic("%s: sopt_dir $%d", __func__, sopt->sopt_dir); 1975 } 1976 1977 /* 1978 * If this assert becomes untrue, we need to change the size of the buf 1979 * variable in tcp_default_ctloutput(). 1980 */ 1981 #ifdef CTASSERT 1982 CTASSERT(TCP_CA_NAME_MAX <= TCP_LOG_ID_LEN); 1983 CTASSERT(TCP_LOG_REASON_LEN <= TCP_LOG_ID_LEN); 1984 #endif 1985 1986 #ifdef KERN_TLS 1987 static int 1988 copyin_tls_enable(struct sockopt *sopt, struct tls_enable *tls) 1989 { 1990 struct tls_enable_v0 tls_v0; 1991 int error; 1992 1993 if (sopt->sopt_valsize == sizeof(tls_v0)) { 1994 error = sooptcopyin(sopt, &tls_v0, sizeof(tls_v0), 1995 sizeof(tls_v0)); 1996 if (error) 1997 return (error); 1998 memset(tls, 0, sizeof(*tls)); 1999 tls->cipher_key = tls_v0.cipher_key; 2000 tls->iv = tls_v0.iv; 2001 tls->auth_key = tls_v0.auth_key; 2002 tls->cipher_algorithm = tls_v0.cipher_algorithm; 2003 tls->cipher_key_len = tls_v0.cipher_key_len; 2004 tls->iv_len = tls_v0.iv_len; 2005 tls->auth_algorithm = tls_v0.auth_algorithm; 2006 tls->auth_key_len = tls_v0.auth_key_len; 2007 tls->flags = tls_v0.flags; 2008 tls->tls_vmajor = tls_v0.tls_vmajor; 2009 tls->tls_vminor = tls_v0.tls_vminor; 2010 return (0); 2011 } 2012 2013 return (sooptcopyin(sopt, tls, sizeof(*tls), sizeof(*tls))); 2014 } 2015 #endif 2016 2017 extern struct cc_algo newreno_cc_algo; 2018 2019 static int 2020 tcp_set_cc_mod(struct inpcb *inp, struct sockopt *sopt) 2021 { 2022 struct cc_algo *algo; 2023 void *ptr = NULL; 2024 struct tcpcb *tp; 2025 struct cc_var cc_mem; 2026 char buf[TCP_CA_NAME_MAX]; 2027 size_t mem_sz; 2028 int error; 2029 2030 INP_WUNLOCK(inp); 2031 error = sooptcopyin(sopt, buf, TCP_CA_NAME_MAX - 1, 1); 2032 if (error) 2033 return(error); 2034 buf[sopt->sopt_valsize] = '\0'; 2035 CC_LIST_RLOCK(); 2036 STAILQ_FOREACH(algo, &cc_list, entries) { 2037 if (strncmp(buf, algo->name, 2038 TCP_CA_NAME_MAX) == 0) { 2039 if (algo->flags & CC_MODULE_BEING_REMOVED) { 2040 /* We can't "see" modules being unloaded */ 2041 continue; 2042 } 2043 break; 2044 } 2045 } 2046 if (algo == NULL) { 2047 CC_LIST_RUNLOCK(); 2048 return(ESRCH); 2049 } 2050 /* 2051 * With a reference the algorithm cannot be removed 2052 * so we hold a reference through the change process. 2053 */ 2054 cc_refer(algo); 2055 CC_LIST_RUNLOCK(); 2056 if (algo->cb_init != NULL) { 2057 /* We can now pre-get the memory for the CC */ 2058 mem_sz = (*algo->cc_data_sz)(); 2059 if (mem_sz == 0) { 2060 goto no_mem_needed; 2061 } 2062 ptr = malloc(mem_sz, M_CC_MEM, M_WAITOK); 2063 } else { 2064 no_mem_needed: 2065 mem_sz = 0; 2066 ptr = NULL; 2067 } 2068 /* 2069 * Make sure its all clean and zero and also get 2070 * back the inplock. 2071 */ 2072 memset(&cc_mem, 0, sizeof(cc_mem)); 2073 INP_WLOCK(inp); 2074 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 2075 INP_WUNLOCK(inp); 2076 if (ptr) 2077 free(ptr, M_CC_MEM); 2078 /* Release our temp reference */ 2079 CC_LIST_RLOCK(); 2080 cc_release(algo); 2081 CC_LIST_RUNLOCK(); 2082 return (ECONNRESET); 2083 } 2084 tp = intotcpcb(inp); 2085 if (ptr != NULL) 2086 memset(ptr, 0, mem_sz); 2087 cc_mem.ccvc.tcp = tp; 2088 /* 2089 * We once again hold a write lock over the tcb so it's 2090 * safe to do these things without ordering concerns. 2091 * Note here we init into stack memory. 2092 */ 2093 if (algo->cb_init != NULL) 2094 error = algo->cb_init(&cc_mem, ptr); 2095 else 2096 error = 0; 2097 /* 2098 * The CC algorithms, when given their memory 2099 * should not fail we could in theory have a 2100 * KASSERT here. 2101 */ 2102 if (error == 0) { 2103 /* 2104 * Touchdown, lets go ahead and move the 2105 * connection to the new CC module by 2106 * copying in the cc_mem after we call 2107 * the old ones cleanup (if any). 2108 */ 2109 if (CC_ALGO(tp)->cb_destroy != NULL) 2110 CC_ALGO(tp)->cb_destroy(tp->ccv); 2111 /* Detach the old CC from the tcpcb */ 2112 cc_detach(tp); 2113 /* Copy in our temp memory that was inited */ 2114 memcpy(tp->ccv, &cc_mem, sizeof(struct cc_var)); 2115 /* Now attach the new, which takes a reference */ 2116 cc_attach(tp, algo); 2117 /* Ok now are we where we have gotten past any conn_init? */ 2118 if (TCPS_HAVEESTABLISHED(tp->t_state) && (CC_ALGO(tp)->conn_init != NULL)) { 2119 /* Yep run the connection init for the new CC */ 2120 CC_ALGO(tp)->conn_init(tp->ccv); 2121 } 2122 } else if (ptr) 2123 free(ptr, M_CC_MEM); 2124 INP_WUNLOCK(inp); 2125 /* Now lets release our temp reference */ 2126 CC_LIST_RLOCK(); 2127 cc_release(algo); 2128 CC_LIST_RUNLOCK(); 2129 return (error); 2130 } 2131 2132 int 2133 tcp_default_ctloutput(struct inpcb *inp, struct sockopt *sopt) 2134 { 2135 struct tcpcb *tp = intotcpcb(inp); 2136 int error, opt, optval; 2137 u_int ui; 2138 struct tcp_info ti; 2139 #ifdef KERN_TLS 2140 struct tls_enable tls; 2141 struct socket *so = inp->inp_socket; 2142 #endif 2143 char *pbuf, buf[TCP_LOG_ID_LEN]; 2144 #ifdef STATS 2145 struct statsblob *sbp; 2146 #endif 2147 size_t len; 2148 2149 INP_WLOCK_ASSERT(inp); 2150 KASSERT((inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) == 0, 2151 ("inp_flags == %x", inp->inp_flags)); 2152 KASSERT(inp->inp_socket != NULL, ("inp_socket == NULL")); 2153 2154 switch (sopt->sopt_level) { 2155 #ifdef INET6 2156 case IPPROTO_IPV6: 2157 MPASS(inp->inp_vflag & INP_IPV6PROTO); 2158 switch (sopt->sopt_name) { 2159 case IPV6_USE_MIN_MTU: 2160 tcp6_use_min_mtu(tp); 2161 /* FALLTHROUGH */ 2162 } 2163 INP_WUNLOCK(inp); 2164 return (0); 2165 #endif 2166 #ifdef INET 2167 case IPPROTO_IP: 2168 INP_WUNLOCK(inp); 2169 return (0); 2170 #endif 2171 } 2172 2173 /* 2174 * For TCP_CCALGOOPT forward the control to CC module, for both 2175 * SOPT_SET and SOPT_GET. 2176 */ 2177 switch (sopt->sopt_name) { 2178 case TCP_CCALGOOPT: 2179 INP_WUNLOCK(inp); 2180 if (sopt->sopt_valsize > CC_ALGOOPT_LIMIT) 2181 return (EINVAL); 2182 pbuf = malloc(sopt->sopt_valsize, M_TEMP, M_WAITOK | M_ZERO); 2183 error = sooptcopyin(sopt, pbuf, sopt->sopt_valsize, 2184 sopt->sopt_valsize); 2185 if (error) { 2186 free(pbuf, M_TEMP); 2187 return (error); 2188 } 2189 INP_WLOCK_RECHECK_CLEANUP(inp, free(pbuf, M_TEMP)); 2190 if (CC_ALGO(tp)->ctl_output != NULL) 2191 error = CC_ALGO(tp)->ctl_output(tp->ccv, sopt, pbuf); 2192 else 2193 error = ENOENT; 2194 INP_WUNLOCK(inp); 2195 if (error == 0 && sopt->sopt_dir == SOPT_GET) 2196 error = sooptcopyout(sopt, pbuf, sopt->sopt_valsize); 2197 free(pbuf, M_TEMP); 2198 return (error); 2199 } 2200 2201 switch (sopt->sopt_dir) { 2202 case SOPT_SET: 2203 switch (sopt->sopt_name) { 2204 #if defined(IPSEC_SUPPORT) || defined(TCP_SIGNATURE) 2205 case TCP_MD5SIG: 2206 INP_WUNLOCK(inp); 2207 if (!TCPMD5_ENABLED()) 2208 return (ENOPROTOOPT); 2209 error = TCPMD5_PCBCTL(inp, sopt); 2210 if (error) 2211 return (error); 2212 INP_WLOCK_RECHECK(inp); 2213 goto unlock_and_done; 2214 #endif /* IPSEC */ 2215 2216 case TCP_NODELAY: 2217 case TCP_NOOPT: 2218 case TCP_LRD: 2219 INP_WUNLOCK(inp); 2220 error = sooptcopyin(sopt, &optval, sizeof optval, 2221 sizeof optval); 2222 if (error) 2223 return (error); 2224 2225 INP_WLOCK_RECHECK(inp); 2226 switch (sopt->sopt_name) { 2227 case TCP_NODELAY: 2228 opt = TF_NODELAY; 2229 break; 2230 case TCP_NOOPT: 2231 opt = TF_NOOPT; 2232 break; 2233 case TCP_LRD: 2234 opt = TF_LRD; 2235 break; 2236 default: 2237 opt = 0; /* dead code to fool gcc */ 2238 break; 2239 } 2240 2241 if (optval) 2242 tp->t_flags |= opt; 2243 else 2244 tp->t_flags &= ~opt; 2245 unlock_and_done: 2246 #ifdef TCP_OFFLOAD 2247 if (tp->t_flags & TF_TOE) { 2248 tcp_offload_ctloutput(tp, sopt->sopt_dir, 2249 sopt->sopt_name); 2250 } 2251 #endif 2252 INP_WUNLOCK(inp); 2253 break; 2254 2255 case TCP_NOPUSH: 2256 INP_WUNLOCK(inp); 2257 error = sooptcopyin(sopt, &optval, sizeof optval, 2258 sizeof optval); 2259 if (error) 2260 return (error); 2261 2262 INP_WLOCK_RECHECK(inp); 2263 if (optval) 2264 tp->t_flags |= TF_NOPUSH; 2265 else if (tp->t_flags & TF_NOPUSH) { 2266 tp->t_flags &= ~TF_NOPUSH; 2267 if (TCPS_HAVEESTABLISHED(tp->t_state)) { 2268 struct epoch_tracker et; 2269 2270 NET_EPOCH_ENTER(et); 2271 error = tcp_output_nodrop(tp); 2272 NET_EPOCH_EXIT(et); 2273 } 2274 } 2275 goto unlock_and_done; 2276 2277 case TCP_REMOTE_UDP_ENCAPS_PORT: 2278 INP_WUNLOCK(inp); 2279 error = sooptcopyin(sopt, &optval, sizeof optval, 2280 sizeof optval); 2281 if (error) 2282 return (error); 2283 if ((optval < TCP_TUNNELING_PORT_MIN) || 2284 (optval > TCP_TUNNELING_PORT_MAX)) { 2285 /* Its got to be in range */ 2286 return (EINVAL); 2287 } 2288 if ((V_tcp_udp_tunneling_port == 0) && (optval != 0)) { 2289 /* You have to have enabled a UDP tunneling port first */ 2290 return (EINVAL); 2291 } 2292 INP_WLOCK_RECHECK(inp); 2293 if (tp->t_state != TCPS_CLOSED) { 2294 /* You can't change after you are connected */ 2295 error = EINVAL; 2296 } else { 2297 /* Ok we are all good set the port */ 2298 tp->t_port = htons(optval); 2299 } 2300 goto unlock_and_done; 2301 2302 case TCP_MAXSEG: 2303 INP_WUNLOCK(inp); 2304 error = sooptcopyin(sopt, &optval, sizeof optval, 2305 sizeof optval); 2306 if (error) 2307 return (error); 2308 2309 INP_WLOCK_RECHECK(inp); 2310 if (optval > 0 && optval <= tp->t_maxseg && 2311 optval + 40 >= V_tcp_minmss) 2312 tp->t_maxseg = optval; 2313 else 2314 error = EINVAL; 2315 goto unlock_and_done; 2316 2317 case TCP_INFO: 2318 INP_WUNLOCK(inp); 2319 error = EINVAL; 2320 break; 2321 2322 case TCP_STATS: 2323 INP_WUNLOCK(inp); 2324 #ifdef STATS 2325 error = sooptcopyin(sopt, &optval, sizeof optval, 2326 sizeof optval); 2327 if (error) 2328 return (error); 2329 2330 if (optval > 0) 2331 sbp = stats_blob_alloc( 2332 V_tcp_perconn_stats_dflt_tpl, 0); 2333 else 2334 sbp = NULL; 2335 2336 INP_WLOCK_RECHECK(inp); 2337 if ((tp->t_stats != NULL && sbp == NULL) || 2338 (tp->t_stats == NULL && sbp != NULL)) { 2339 struct statsblob *t = tp->t_stats; 2340 tp->t_stats = sbp; 2341 sbp = t; 2342 } 2343 INP_WUNLOCK(inp); 2344 2345 stats_blob_destroy(sbp); 2346 #else 2347 return (EOPNOTSUPP); 2348 #endif /* !STATS */ 2349 break; 2350 2351 case TCP_CONGESTION: 2352 error = tcp_set_cc_mod(inp, sopt); 2353 break; 2354 2355 case TCP_REUSPORT_LB_NUMA: 2356 INP_WUNLOCK(inp); 2357 error = sooptcopyin(sopt, &optval, sizeof(optval), 2358 sizeof(optval)); 2359 INP_WLOCK_RECHECK(inp); 2360 if (!error) 2361 error = in_pcblbgroup_numa(inp, optval); 2362 INP_WUNLOCK(inp); 2363 break; 2364 2365 #ifdef KERN_TLS 2366 case TCP_TXTLS_ENABLE: 2367 INP_WUNLOCK(inp); 2368 error = copyin_tls_enable(sopt, &tls); 2369 if (error) 2370 break; 2371 error = ktls_enable_tx(so, &tls); 2372 break; 2373 case TCP_TXTLS_MODE: 2374 INP_WUNLOCK(inp); 2375 error = sooptcopyin(sopt, &ui, sizeof(ui), sizeof(ui)); 2376 if (error) 2377 return (error); 2378 2379 INP_WLOCK_RECHECK(inp); 2380 error = ktls_set_tx_mode(so, ui); 2381 INP_WUNLOCK(inp); 2382 break; 2383 case TCP_RXTLS_ENABLE: 2384 INP_WUNLOCK(inp); 2385 error = sooptcopyin(sopt, &tls, sizeof(tls), 2386 sizeof(tls)); 2387 if (error) 2388 break; 2389 error = ktls_enable_rx(so, &tls); 2390 break; 2391 #endif 2392 2393 case TCP_KEEPIDLE: 2394 case TCP_KEEPINTVL: 2395 case TCP_KEEPINIT: 2396 INP_WUNLOCK(inp); 2397 error = sooptcopyin(sopt, &ui, sizeof(ui), sizeof(ui)); 2398 if (error) 2399 return (error); 2400 2401 if (ui > (UINT_MAX / hz)) { 2402 error = EINVAL; 2403 break; 2404 } 2405 ui *= hz; 2406 2407 INP_WLOCK_RECHECK(inp); 2408 switch (sopt->sopt_name) { 2409 case TCP_KEEPIDLE: 2410 tp->t_keepidle = ui; 2411 /* 2412 * XXX: better check current remaining 2413 * timeout and "merge" it with new value. 2414 */ 2415 if ((tp->t_state > TCPS_LISTEN) && 2416 (tp->t_state <= TCPS_CLOSING)) 2417 tcp_timer_activate(tp, TT_KEEP, 2418 TP_KEEPIDLE(tp)); 2419 break; 2420 case TCP_KEEPINTVL: 2421 tp->t_keepintvl = ui; 2422 if ((tp->t_state == TCPS_FIN_WAIT_2) && 2423 (TP_MAXIDLE(tp) > 0)) 2424 tcp_timer_activate(tp, TT_2MSL, 2425 TP_MAXIDLE(tp)); 2426 break; 2427 case TCP_KEEPINIT: 2428 tp->t_keepinit = ui; 2429 if (tp->t_state == TCPS_SYN_RECEIVED || 2430 tp->t_state == TCPS_SYN_SENT) 2431 tcp_timer_activate(tp, TT_KEEP, 2432 TP_KEEPINIT(tp)); 2433 break; 2434 } 2435 goto unlock_and_done; 2436 2437 case TCP_KEEPCNT: 2438 INP_WUNLOCK(inp); 2439 error = sooptcopyin(sopt, &ui, sizeof(ui), sizeof(ui)); 2440 if (error) 2441 return (error); 2442 2443 INP_WLOCK_RECHECK(inp); 2444 tp->t_keepcnt = ui; 2445 if ((tp->t_state == TCPS_FIN_WAIT_2) && 2446 (TP_MAXIDLE(tp) > 0)) 2447 tcp_timer_activate(tp, TT_2MSL, 2448 TP_MAXIDLE(tp)); 2449 goto unlock_and_done; 2450 2451 #ifdef TCPPCAP 2452 case TCP_PCAP_OUT: 2453 case TCP_PCAP_IN: 2454 INP_WUNLOCK(inp); 2455 error = sooptcopyin(sopt, &optval, sizeof optval, 2456 sizeof optval); 2457 if (error) 2458 return (error); 2459 2460 INP_WLOCK_RECHECK(inp); 2461 if (optval >= 0) 2462 tcp_pcap_set_sock_max(TCP_PCAP_OUT ? 2463 &(tp->t_outpkts) : &(tp->t_inpkts), 2464 optval); 2465 else 2466 error = EINVAL; 2467 goto unlock_and_done; 2468 #endif 2469 2470 case TCP_FASTOPEN: { 2471 struct tcp_fastopen tfo_optval; 2472 2473 INP_WUNLOCK(inp); 2474 if (!V_tcp_fastopen_client_enable && 2475 !V_tcp_fastopen_server_enable) 2476 return (EPERM); 2477 2478 error = sooptcopyin(sopt, &tfo_optval, 2479 sizeof(tfo_optval), sizeof(int)); 2480 if (error) 2481 return (error); 2482 2483 INP_WLOCK_RECHECK(inp); 2484 if ((tp->t_state != TCPS_CLOSED) && 2485 (tp->t_state != TCPS_LISTEN)) { 2486 error = EINVAL; 2487 goto unlock_and_done; 2488 } 2489 if (tfo_optval.enable) { 2490 if (tp->t_state == TCPS_LISTEN) { 2491 if (!V_tcp_fastopen_server_enable) { 2492 error = EPERM; 2493 goto unlock_and_done; 2494 } 2495 2496 if (tp->t_tfo_pending == NULL) 2497 tp->t_tfo_pending = 2498 tcp_fastopen_alloc_counter(); 2499 } else { 2500 /* 2501 * If a pre-shared key was provided, 2502 * stash it in the client cookie 2503 * field of the tcpcb for use during 2504 * connect. 2505 */ 2506 if (sopt->sopt_valsize == 2507 sizeof(tfo_optval)) { 2508 memcpy(tp->t_tfo_cookie.client, 2509 tfo_optval.psk, 2510 TCP_FASTOPEN_PSK_LEN); 2511 tp->t_tfo_client_cookie_len = 2512 TCP_FASTOPEN_PSK_LEN; 2513 } 2514 } 2515 tp->t_flags |= TF_FASTOPEN; 2516 } else 2517 tp->t_flags &= ~TF_FASTOPEN; 2518 goto unlock_and_done; 2519 } 2520 2521 #ifdef TCP_BLACKBOX 2522 case TCP_LOG: 2523 INP_WUNLOCK(inp); 2524 error = sooptcopyin(sopt, &optval, sizeof optval, 2525 sizeof optval); 2526 if (error) 2527 return (error); 2528 2529 INP_WLOCK_RECHECK(inp); 2530 error = tcp_log_state_change(tp, optval); 2531 goto unlock_and_done; 2532 2533 case TCP_LOGBUF: 2534 INP_WUNLOCK(inp); 2535 error = EINVAL; 2536 break; 2537 2538 case TCP_LOGID: 2539 INP_WUNLOCK(inp); 2540 error = sooptcopyin(sopt, buf, TCP_LOG_ID_LEN - 1, 0); 2541 if (error) 2542 break; 2543 buf[sopt->sopt_valsize] = '\0'; 2544 INP_WLOCK_RECHECK(inp); 2545 error = tcp_log_set_id(tp, buf); 2546 /* tcp_log_set_id() unlocks the INP. */ 2547 break; 2548 2549 case TCP_LOGDUMP: 2550 case TCP_LOGDUMPID: 2551 INP_WUNLOCK(inp); 2552 error = 2553 sooptcopyin(sopt, buf, TCP_LOG_REASON_LEN - 1, 0); 2554 if (error) 2555 break; 2556 buf[sopt->sopt_valsize] = '\0'; 2557 INP_WLOCK_RECHECK(inp); 2558 if (sopt->sopt_name == TCP_LOGDUMP) { 2559 error = tcp_log_dump_tp_logbuf(tp, buf, 2560 M_WAITOK, true); 2561 INP_WUNLOCK(inp); 2562 } else { 2563 tcp_log_dump_tp_bucket_logbufs(tp, buf); 2564 /* 2565 * tcp_log_dump_tp_bucket_logbufs() drops the 2566 * INP lock. 2567 */ 2568 } 2569 break; 2570 #endif 2571 2572 default: 2573 INP_WUNLOCK(inp); 2574 error = ENOPROTOOPT; 2575 break; 2576 } 2577 break; 2578 2579 case SOPT_GET: 2580 tp = intotcpcb(inp); 2581 switch (sopt->sopt_name) { 2582 #if defined(IPSEC_SUPPORT) || defined(TCP_SIGNATURE) 2583 case TCP_MD5SIG: 2584 INP_WUNLOCK(inp); 2585 if (!TCPMD5_ENABLED()) 2586 return (ENOPROTOOPT); 2587 error = TCPMD5_PCBCTL(inp, sopt); 2588 break; 2589 #endif 2590 2591 case TCP_NODELAY: 2592 optval = tp->t_flags & TF_NODELAY; 2593 INP_WUNLOCK(inp); 2594 error = sooptcopyout(sopt, &optval, sizeof optval); 2595 break; 2596 case TCP_MAXSEG: 2597 optval = tp->t_maxseg; 2598 INP_WUNLOCK(inp); 2599 error = sooptcopyout(sopt, &optval, sizeof optval); 2600 break; 2601 case TCP_REMOTE_UDP_ENCAPS_PORT: 2602 optval = ntohs(tp->t_port); 2603 INP_WUNLOCK(inp); 2604 error = sooptcopyout(sopt, &optval, sizeof optval); 2605 break; 2606 case TCP_NOOPT: 2607 optval = tp->t_flags & TF_NOOPT; 2608 INP_WUNLOCK(inp); 2609 error = sooptcopyout(sopt, &optval, sizeof optval); 2610 break; 2611 case TCP_NOPUSH: 2612 optval = tp->t_flags & TF_NOPUSH; 2613 INP_WUNLOCK(inp); 2614 error = sooptcopyout(sopt, &optval, sizeof optval); 2615 break; 2616 case TCP_INFO: 2617 tcp_fill_info(tp, &ti); 2618 INP_WUNLOCK(inp); 2619 error = sooptcopyout(sopt, &ti, sizeof ti); 2620 break; 2621 case TCP_STATS: 2622 { 2623 #ifdef STATS 2624 int nheld; 2625 TYPEOF_MEMBER(struct statsblob, flags) sbflags = 0; 2626 2627 error = 0; 2628 socklen_t outsbsz = sopt->sopt_valsize; 2629 if (tp->t_stats == NULL) 2630 error = ENOENT; 2631 else if (outsbsz >= tp->t_stats->cursz) 2632 outsbsz = tp->t_stats->cursz; 2633 else if (outsbsz >= sizeof(struct statsblob)) 2634 outsbsz = sizeof(struct statsblob); 2635 else 2636 error = EINVAL; 2637 INP_WUNLOCK(inp); 2638 if (error) 2639 break; 2640 2641 sbp = sopt->sopt_val; 2642 nheld = atop(round_page(((vm_offset_t)sbp) + 2643 (vm_size_t)outsbsz) - trunc_page((vm_offset_t)sbp)); 2644 vm_page_t ma[nheld]; 2645 if (vm_fault_quick_hold_pages( 2646 &curproc->p_vmspace->vm_map, (vm_offset_t)sbp, 2647 outsbsz, VM_PROT_READ | VM_PROT_WRITE, ma, 2648 nheld) < 0) { 2649 error = EFAULT; 2650 break; 2651 } 2652 2653 if ((error = copyin_nofault(&(sbp->flags), &sbflags, 2654 SIZEOF_MEMBER(struct statsblob, flags)))) 2655 goto unhold; 2656 2657 INP_WLOCK_RECHECK(inp); 2658 error = stats_blob_snapshot(&sbp, outsbsz, tp->t_stats, 2659 sbflags | SB_CLONE_USRDSTNOFAULT); 2660 INP_WUNLOCK(inp); 2661 sopt->sopt_valsize = outsbsz; 2662 unhold: 2663 vm_page_unhold_pages(ma, nheld); 2664 #else 2665 INP_WUNLOCK(inp); 2666 error = EOPNOTSUPP; 2667 #endif /* !STATS */ 2668 break; 2669 } 2670 case TCP_CONGESTION: 2671 len = strlcpy(buf, CC_ALGO(tp)->name, TCP_CA_NAME_MAX); 2672 INP_WUNLOCK(inp); 2673 error = sooptcopyout(sopt, buf, len + 1); 2674 break; 2675 case TCP_KEEPIDLE: 2676 case TCP_KEEPINTVL: 2677 case TCP_KEEPINIT: 2678 case TCP_KEEPCNT: 2679 switch (sopt->sopt_name) { 2680 case TCP_KEEPIDLE: 2681 ui = TP_KEEPIDLE(tp) / hz; 2682 break; 2683 case TCP_KEEPINTVL: 2684 ui = TP_KEEPINTVL(tp) / hz; 2685 break; 2686 case TCP_KEEPINIT: 2687 ui = TP_KEEPINIT(tp) / hz; 2688 break; 2689 case TCP_KEEPCNT: 2690 ui = TP_KEEPCNT(tp); 2691 break; 2692 } 2693 INP_WUNLOCK(inp); 2694 error = sooptcopyout(sopt, &ui, sizeof(ui)); 2695 break; 2696 #ifdef TCPPCAP 2697 case TCP_PCAP_OUT: 2698 case TCP_PCAP_IN: 2699 optval = tcp_pcap_get_sock_max(TCP_PCAP_OUT ? 2700 &(tp->t_outpkts) : &(tp->t_inpkts)); 2701 INP_WUNLOCK(inp); 2702 error = sooptcopyout(sopt, &optval, sizeof optval); 2703 break; 2704 #endif 2705 case TCP_FASTOPEN: 2706 optval = tp->t_flags & TF_FASTOPEN; 2707 INP_WUNLOCK(inp); 2708 error = sooptcopyout(sopt, &optval, sizeof optval); 2709 break; 2710 #ifdef TCP_BLACKBOX 2711 case TCP_LOG: 2712 optval = tp->t_logstate; 2713 INP_WUNLOCK(inp); 2714 error = sooptcopyout(sopt, &optval, sizeof(optval)); 2715 break; 2716 case TCP_LOGBUF: 2717 /* tcp_log_getlogbuf() does INP_WUNLOCK(inp) */ 2718 error = tcp_log_getlogbuf(sopt, tp); 2719 break; 2720 case TCP_LOGID: 2721 len = tcp_log_get_id(tp, buf); 2722 INP_WUNLOCK(inp); 2723 error = sooptcopyout(sopt, buf, len + 1); 2724 break; 2725 case TCP_LOGDUMP: 2726 case TCP_LOGDUMPID: 2727 INP_WUNLOCK(inp); 2728 error = EINVAL; 2729 break; 2730 #endif 2731 #ifdef KERN_TLS 2732 case TCP_TXTLS_MODE: 2733 error = ktls_get_tx_mode(so, &optval); 2734 INP_WUNLOCK(inp); 2735 if (error == 0) 2736 error = sooptcopyout(sopt, &optval, 2737 sizeof(optval)); 2738 break; 2739 case TCP_RXTLS_MODE: 2740 error = ktls_get_rx_mode(so, &optval); 2741 INP_WUNLOCK(inp); 2742 if (error == 0) 2743 error = sooptcopyout(sopt, &optval, 2744 sizeof(optval)); 2745 break; 2746 #endif 2747 case TCP_LRD: 2748 optval = tp->t_flags & TF_LRD; 2749 INP_WUNLOCK(inp); 2750 error = sooptcopyout(sopt, &optval, sizeof optval); 2751 break; 2752 default: 2753 INP_WUNLOCK(inp); 2754 error = ENOPROTOOPT; 2755 break; 2756 } 2757 break; 2758 } 2759 return (error); 2760 } 2761 #undef INP_WLOCK_RECHECK 2762 #undef INP_WLOCK_RECHECK_CLEANUP 2763 2764 /* 2765 * Initiate (or continue) disconnect. 2766 * If embryonic state, just send reset (once). 2767 * If in ``let data drain'' option and linger null, just drop. 2768 * Otherwise (hard), mark socket disconnecting and drop 2769 * current input data; switch states based on user close, and 2770 * send segment to peer (with FIN). 2771 */ 2772 static void 2773 tcp_disconnect(struct tcpcb *tp) 2774 { 2775 struct inpcb *inp = tp->t_inpcb; 2776 struct socket *so = inp->inp_socket; 2777 2778 NET_EPOCH_ASSERT(); 2779 INP_WLOCK_ASSERT(inp); 2780 2781 /* 2782 * Neither tcp_close() nor tcp_drop() should return NULL, as the 2783 * socket is still open. 2784 */ 2785 if (tp->t_state < TCPS_ESTABLISHED && 2786 !(tp->t_state > TCPS_LISTEN && IS_FASTOPEN(tp->t_flags))) { 2787 tp = tcp_close(tp); 2788 KASSERT(tp != NULL, 2789 ("tcp_disconnect: tcp_close() returned NULL")); 2790 } else if ((so->so_options & SO_LINGER) && so->so_linger == 0) { 2791 tp = tcp_drop(tp, 0); 2792 KASSERT(tp != NULL, 2793 ("tcp_disconnect: tcp_drop() returned NULL")); 2794 } else { 2795 soisdisconnecting(so); 2796 sbflush(&so->so_rcv); 2797 tcp_usrclosed(tp); 2798 if (!(inp->inp_flags & INP_DROPPED)) 2799 /* Ignore stack's drop request, we already at it. */ 2800 (void)tcp_output_nodrop(tp); 2801 } 2802 } 2803 2804 /* 2805 * User issued close, and wish to trail through shutdown states: 2806 * if never received SYN, just forget it. If got a SYN from peer, 2807 * but haven't sent FIN, then go to FIN_WAIT_1 state to send peer a FIN. 2808 * If already got a FIN from peer, then almost done; go to LAST_ACK 2809 * state. In all other cases, have already sent FIN to peer (e.g. 2810 * after PRU_SHUTDOWN), and just have to play tedious game waiting 2811 * for peer to send FIN or not respond to keep-alives, etc. 2812 * We can let the user exit from the close as soon as the FIN is acked. 2813 */ 2814 static void 2815 tcp_usrclosed(struct tcpcb *tp) 2816 { 2817 2818 NET_EPOCH_ASSERT(); 2819 INP_WLOCK_ASSERT(tp->t_inpcb); 2820 2821 switch (tp->t_state) { 2822 case TCPS_LISTEN: 2823 #ifdef TCP_OFFLOAD 2824 tcp_offload_listen_stop(tp); 2825 #endif 2826 tcp_state_change(tp, TCPS_CLOSED); 2827 /* FALLTHROUGH */ 2828 case TCPS_CLOSED: 2829 tp = tcp_close(tp); 2830 /* 2831 * tcp_close() should never return NULL here as the socket is 2832 * still open. 2833 */ 2834 KASSERT(tp != NULL, 2835 ("tcp_usrclosed: tcp_close() returned NULL")); 2836 break; 2837 2838 case TCPS_SYN_SENT: 2839 case TCPS_SYN_RECEIVED: 2840 tp->t_flags |= TF_NEEDFIN; 2841 break; 2842 2843 case TCPS_ESTABLISHED: 2844 tcp_state_change(tp, TCPS_FIN_WAIT_1); 2845 break; 2846 2847 case TCPS_CLOSE_WAIT: 2848 tcp_state_change(tp, TCPS_LAST_ACK); 2849 break; 2850 } 2851 if (tp->t_state >= TCPS_FIN_WAIT_2) { 2852 soisdisconnected(tp->t_inpcb->inp_socket); 2853 /* Prevent the connection hanging in FIN_WAIT_2 forever. */ 2854 if (tp->t_state == TCPS_FIN_WAIT_2) { 2855 int timeout; 2856 2857 timeout = (tcp_fast_finwait2_recycle) ? 2858 tcp_finwait2_timeout : TP_MAXIDLE(tp); 2859 tcp_timer_activate(tp, TT_2MSL, timeout); 2860 } 2861 } 2862 } 2863 2864 #ifdef DDB 2865 static void 2866 db_print_indent(int indent) 2867 { 2868 int i; 2869 2870 for (i = 0; i < indent; i++) 2871 db_printf(" "); 2872 } 2873 2874 static void 2875 db_print_tstate(int t_state) 2876 { 2877 2878 switch (t_state) { 2879 case TCPS_CLOSED: 2880 db_printf("TCPS_CLOSED"); 2881 return; 2882 2883 case TCPS_LISTEN: 2884 db_printf("TCPS_LISTEN"); 2885 return; 2886 2887 case TCPS_SYN_SENT: 2888 db_printf("TCPS_SYN_SENT"); 2889 return; 2890 2891 case TCPS_SYN_RECEIVED: 2892 db_printf("TCPS_SYN_RECEIVED"); 2893 return; 2894 2895 case TCPS_ESTABLISHED: 2896 db_printf("TCPS_ESTABLISHED"); 2897 return; 2898 2899 case TCPS_CLOSE_WAIT: 2900 db_printf("TCPS_CLOSE_WAIT"); 2901 return; 2902 2903 case TCPS_FIN_WAIT_1: 2904 db_printf("TCPS_FIN_WAIT_1"); 2905 return; 2906 2907 case TCPS_CLOSING: 2908 db_printf("TCPS_CLOSING"); 2909 return; 2910 2911 case TCPS_LAST_ACK: 2912 db_printf("TCPS_LAST_ACK"); 2913 return; 2914 2915 case TCPS_FIN_WAIT_2: 2916 db_printf("TCPS_FIN_WAIT_2"); 2917 return; 2918 2919 case TCPS_TIME_WAIT: 2920 db_printf("TCPS_TIME_WAIT"); 2921 return; 2922 2923 default: 2924 db_printf("unknown"); 2925 return; 2926 } 2927 } 2928 2929 static void 2930 db_print_tflags(u_int t_flags) 2931 { 2932 int comma; 2933 2934 comma = 0; 2935 if (t_flags & TF_ACKNOW) { 2936 db_printf("%sTF_ACKNOW", comma ? ", " : ""); 2937 comma = 1; 2938 } 2939 if (t_flags & TF_DELACK) { 2940 db_printf("%sTF_DELACK", comma ? ", " : ""); 2941 comma = 1; 2942 } 2943 if (t_flags & TF_NODELAY) { 2944 db_printf("%sTF_NODELAY", comma ? ", " : ""); 2945 comma = 1; 2946 } 2947 if (t_flags & TF_NOOPT) { 2948 db_printf("%sTF_NOOPT", comma ? ", " : ""); 2949 comma = 1; 2950 } 2951 if (t_flags & TF_SENTFIN) { 2952 db_printf("%sTF_SENTFIN", comma ? ", " : ""); 2953 comma = 1; 2954 } 2955 if (t_flags & TF_REQ_SCALE) { 2956 db_printf("%sTF_REQ_SCALE", comma ? ", " : ""); 2957 comma = 1; 2958 } 2959 if (t_flags & TF_RCVD_SCALE) { 2960 db_printf("%sTF_RECVD_SCALE", comma ? ", " : ""); 2961 comma = 1; 2962 } 2963 if (t_flags & TF_REQ_TSTMP) { 2964 db_printf("%sTF_REQ_TSTMP", comma ? ", " : ""); 2965 comma = 1; 2966 } 2967 if (t_flags & TF_RCVD_TSTMP) { 2968 db_printf("%sTF_RCVD_TSTMP", comma ? ", " : ""); 2969 comma = 1; 2970 } 2971 if (t_flags & TF_SACK_PERMIT) { 2972 db_printf("%sTF_SACK_PERMIT", comma ? ", " : ""); 2973 comma = 1; 2974 } 2975 if (t_flags & TF_NEEDSYN) { 2976 db_printf("%sTF_NEEDSYN", comma ? ", " : ""); 2977 comma = 1; 2978 } 2979 if (t_flags & TF_NEEDFIN) { 2980 db_printf("%sTF_NEEDFIN", comma ? ", " : ""); 2981 comma = 1; 2982 } 2983 if (t_flags & TF_NOPUSH) { 2984 db_printf("%sTF_NOPUSH", comma ? ", " : ""); 2985 comma = 1; 2986 } 2987 if (t_flags & TF_PREVVALID) { 2988 db_printf("%sTF_PREVVALID", comma ? ", " : ""); 2989 comma = 1; 2990 } 2991 if (t_flags & TF_MORETOCOME) { 2992 db_printf("%sTF_MORETOCOME", comma ? ", " : ""); 2993 comma = 1; 2994 } 2995 if (t_flags & TF_LQ_OVERFLOW) { 2996 db_printf("%sTF_LQ_OVERFLOW", comma ? ", " : ""); 2997 comma = 1; 2998 } 2999 if (t_flags & TF_LASTIDLE) { 3000 db_printf("%sTF_LASTIDLE", comma ? ", " : ""); 3001 comma = 1; 3002 } 3003 if (t_flags & TF_RXWIN0SENT) { 3004 db_printf("%sTF_RXWIN0SENT", comma ? ", " : ""); 3005 comma = 1; 3006 } 3007 if (t_flags & TF_FASTRECOVERY) { 3008 db_printf("%sTF_FASTRECOVERY", comma ? ", " : ""); 3009 comma = 1; 3010 } 3011 if (t_flags & TF_CONGRECOVERY) { 3012 db_printf("%sTF_CONGRECOVERY", comma ? ", " : ""); 3013 comma = 1; 3014 } 3015 if (t_flags & TF_WASFRECOVERY) { 3016 db_printf("%sTF_WASFRECOVERY", comma ? ", " : ""); 3017 comma = 1; 3018 } 3019 if (t_flags & TF_WASCRECOVERY) { 3020 db_printf("%sTF_WASCRECOVERY", comma ? ", " : ""); 3021 comma = 1; 3022 } 3023 if (t_flags & TF_SIGNATURE) { 3024 db_printf("%sTF_SIGNATURE", comma ? ", " : ""); 3025 comma = 1; 3026 } 3027 if (t_flags & TF_FORCEDATA) { 3028 db_printf("%sTF_FORCEDATA", comma ? ", " : ""); 3029 comma = 1; 3030 } 3031 if (t_flags & TF_TSO) { 3032 db_printf("%sTF_TSO", comma ? ", " : ""); 3033 comma = 1; 3034 } 3035 if (t_flags & TF_FASTOPEN) { 3036 db_printf("%sTF_FASTOPEN", comma ? ", " : ""); 3037 comma = 1; 3038 } 3039 } 3040 3041 static void 3042 db_print_tflags2(u_int t_flags2) 3043 { 3044 int comma; 3045 3046 comma = 0; 3047 if (t_flags2 & TF2_PLPMTU_BLACKHOLE) { 3048 db_printf("%sTF2_PLPMTU_BLACKHOLE", comma ? ", " : ""); 3049 comma = 1; 3050 } 3051 if (t_flags2 & TF2_PLPMTU_PMTUD) { 3052 db_printf("%sTF2_PLPMTU_PMTUD", comma ? ", " : ""); 3053 comma = 1; 3054 } 3055 if (t_flags2 & TF2_PLPMTU_MAXSEGSNT) { 3056 db_printf("%sTF2_PLPMTU_MAXSEGSNT", comma ? ", " : ""); 3057 comma = 1; 3058 } 3059 if (t_flags2 & TF2_LOG_AUTO) { 3060 db_printf("%sTF2_LOG_AUTO", comma ? ", " : ""); 3061 comma = 1; 3062 } 3063 if (t_flags2 & TF2_DROP_AF_DATA) { 3064 db_printf("%sTF2_DROP_AF_DATA", comma ? ", " : ""); 3065 comma = 1; 3066 } 3067 if (t_flags2 & TF2_ECN_PERMIT) { 3068 db_printf("%sTF2_ECN_PERMIT", comma ? ", " : ""); 3069 comma = 1; 3070 } 3071 if (t_flags2 & TF2_ECN_SND_CWR) { 3072 db_printf("%sTF2_ECN_SND_CWR", comma ? ", " : ""); 3073 comma = 1; 3074 } 3075 if (t_flags2 & TF2_ECN_SND_ECE) { 3076 db_printf("%sTF2_ECN_SND_ECE", comma ? ", " : ""); 3077 comma = 1; 3078 } 3079 if (t_flags2 & TF2_ACE_PERMIT) { 3080 db_printf("%sTF2_ACE_PERMIT", comma ? ", " : ""); 3081 comma = 1; 3082 } 3083 if (t_flags2 & TF2_FBYTES_COMPLETE) { 3084 db_printf("%sTF2_FBYTES_COMPLETE", comma ? ", " : ""); 3085 comma = 1; 3086 } 3087 } 3088 3089 static void 3090 db_print_toobflags(char t_oobflags) 3091 { 3092 int comma; 3093 3094 comma = 0; 3095 if (t_oobflags & TCPOOB_HAVEDATA) { 3096 db_printf("%sTCPOOB_HAVEDATA", comma ? ", " : ""); 3097 comma = 1; 3098 } 3099 if (t_oobflags & TCPOOB_HADDATA) { 3100 db_printf("%sTCPOOB_HADDATA", comma ? ", " : ""); 3101 comma = 1; 3102 } 3103 } 3104 3105 static void 3106 db_print_tcpcb(struct tcpcb *tp, const char *name, int indent) 3107 { 3108 3109 db_print_indent(indent); 3110 db_printf("%s at %p\n", name, tp); 3111 3112 indent += 2; 3113 3114 db_print_indent(indent); 3115 db_printf("t_segq first: %p t_segqlen: %d t_dupacks: %d\n", 3116 TAILQ_FIRST(&tp->t_segq), tp->t_segqlen, tp->t_dupacks); 3117 3118 db_print_indent(indent); 3119 db_printf("tt_rexmt: %p tt_persist: %p tt_keep: %p\n", 3120 &tp->t_timers->tt_rexmt, &tp->t_timers->tt_persist, &tp->t_timers->tt_keep); 3121 3122 db_print_indent(indent); 3123 db_printf("tt_2msl: %p tt_delack: %p t_inpcb: %p\n", &tp->t_timers->tt_2msl, 3124 &tp->t_timers->tt_delack, tp->t_inpcb); 3125 3126 db_print_indent(indent); 3127 db_printf("t_state: %d (", tp->t_state); 3128 db_print_tstate(tp->t_state); 3129 db_printf(")\n"); 3130 3131 db_print_indent(indent); 3132 db_printf("t_flags: 0x%x (", tp->t_flags); 3133 db_print_tflags(tp->t_flags); 3134 db_printf(")\n"); 3135 3136 db_print_indent(indent); 3137 db_printf("t_flags2: 0x%x (", tp->t_flags2); 3138 db_print_tflags2(tp->t_flags2); 3139 db_printf(")\n"); 3140 3141 db_print_indent(indent); 3142 db_printf("snd_una: 0x%08x snd_max: 0x%08x snd_nxt: x0%08x\n", 3143 tp->snd_una, tp->snd_max, tp->snd_nxt); 3144 3145 db_print_indent(indent); 3146 db_printf("snd_up: 0x%08x snd_wl1: 0x%08x snd_wl2: 0x%08x\n", 3147 tp->snd_up, tp->snd_wl1, tp->snd_wl2); 3148 3149 db_print_indent(indent); 3150 db_printf("iss: 0x%08x irs: 0x%08x rcv_nxt: 0x%08x\n", 3151 tp->iss, tp->irs, tp->rcv_nxt); 3152 3153 db_print_indent(indent); 3154 db_printf("rcv_adv: 0x%08x rcv_wnd: %u rcv_up: 0x%08x\n", 3155 tp->rcv_adv, tp->rcv_wnd, tp->rcv_up); 3156 3157 db_print_indent(indent); 3158 db_printf("snd_wnd: %u snd_cwnd: %u\n", 3159 tp->snd_wnd, tp->snd_cwnd); 3160 3161 db_print_indent(indent); 3162 db_printf("snd_ssthresh: %u snd_recover: " 3163 "0x%08x\n", tp->snd_ssthresh, tp->snd_recover); 3164 3165 db_print_indent(indent); 3166 db_printf("t_rcvtime: %u t_startime: %u\n", 3167 tp->t_rcvtime, tp->t_starttime); 3168 3169 db_print_indent(indent); 3170 db_printf("t_rttime: %u t_rtsq: 0x%08x\n", 3171 tp->t_rtttime, tp->t_rtseq); 3172 3173 db_print_indent(indent); 3174 db_printf("t_rxtcur: %d t_maxseg: %u t_srtt: %d\n", 3175 tp->t_rxtcur, tp->t_maxseg, tp->t_srtt); 3176 3177 db_print_indent(indent); 3178 db_printf("t_rttvar: %d t_rxtshift: %d t_rttmin: %u " 3179 "t_rttbest: %u\n", tp->t_rttvar, tp->t_rxtshift, tp->t_rttmin, 3180 tp->t_rttbest); 3181 3182 db_print_indent(indent); 3183 db_printf("t_rttupdated: %lu max_sndwnd: %u t_softerror: %d\n", 3184 tp->t_rttupdated, tp->max_sndwnd, tp->t_softerror); 3185 3186 db_print_indent(indent); 3187 db_printf("t_oobflags: 0x%x (", tp->t_oobflags); 3188 db_print_toobflags(tp->t_oobflags); 3189 db_printf(") t_iobc: 0x%02x\n", tp->t_iobc); 3190 3191 db_print_indent(indent); 3192 db_printf("snd_scale: %u rcv_scale: %u request_r_scale: %u\n", 3193 tp->snd_scale, tp->rcv_scale, tp->request_r_scale); 3194 3195 db_print_indent(indent); 3196 db_printf("ts_recent: %u ts_recent_age: %u\n", 3197 tp->ts_recent, tp->ts_recent_age); 3198 3199 db_print_indent(indent); 3200 db_printf("ts_offset: %u last_ack_sent: 0x%08x snd_cwnd_prev: " 3201 "%u\n", tp->ts_offset, tp->last_ack_sent, tp->snd_cwnd_prev); 3202 3203 db_print_indent(indent); 3204 db_printf("snd_ssthresh_prev: %u snd_recover_prev: 0x%08x " 3205 "t_badrxtwin: %u\n", tp->snd_ssthresh_prev, 3206 tp->snd_recover_prev, tp->t_badrxtwin); 3207 3208 db_print_indent(indent); 3209 db_printf("snd_numholes: %d snd_holes first: %p\n", 3210 tp->snd_numholes, TAILQ_FIRST(&tp->snd_holes)); 3211 3212 db_print_indent(indent); 3213 db_printf("snd_fack: 0x%08x rcv_numsacks: %d\n", 3214 tp->snd_fack, tp->rcv_numsacks); 3215 3216 /* Skip sackblks, sackhint. */ 3217 3218 db_print_indent(indent); 3219 db_printf("t_rttlow: %d rfbuf_ts: %u rfbuf_cnt: %d\n", 3220 tp->t_rttlow, tp->rfbuf_ts, tp->rfbuf_cnt); 3221 } 3222 3223 DB_SHOW_COMMAND(tcpcb, db_show_tcpcb) 3224 { 3225 struct tcpcb *tp; 3226 3227 if (!have_addr) { 3228 db_printf("usage: show tcpcb <addr>\n"); 3229 return; 3230 } 3231 tp = (struct tcpcb *)addr; 3232 3233 db_print_tcpcb(tp, "tcpcb", 0); 3234 } 3235 #endif 3236