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/syslog.h> 70 #include <sys/stats.h> 71 72 #ifdef DDB 73 #include <ddb/ddb.h> 74 #endif 75 76 #include <net/if.h> 77 #include <net/if_var.h> 78 #include <net/route.h> 79 #include <net/vnet.h> 80 81 #include <netinet/in.h> 82 #include <netinet/in_kdtrace.h> 83 #include <netinet/in_pcb.h> 84 #include <netinet/in_systm.h> 85 #include <netinet/in_var.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 #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 attaches to socket via pru_attach(), reserving space, 149 * and an internet control block. 150 */ 151 static int 152 tcp_usr_attach(struct socket *so, int proto, struct thread *td) 153 { 154 struct inpcb *inp; 155 struct tcpcb *tp = NULL; 156 int error; 157 TCPDEBUG0; 158 159 inp = sotoinpcb(so); 160 KASSERT(inp == NULL, ("tcp_usr_attach: inp != NULL")); 161 TCPDEBUG1(); 162 163 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 164 error = soreserve(so, V_tcp_sendspace, V_tcp_recvspace); 165 if (error) 166 goto out; 167 } 168 169 so->so_rcv.sb_flags |= SB_AUTOSIZE; 170 so->so_snd.sb_flags |= SB_AUTOSIZE; 171 error = in_pcballoc(so, &V_tcbinfo); 172 if (error) 173 goto out; 174 inp = sotoinpcb(so); 175 #ifdef INET6 176 if (inp->inp_vflag & INP_IPV6PROTO) { 177 inp->inp_vflag |= INP_IPV6; 178 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) 179 inp->inp_vflag |= INP_IPV4; 180 inp->in6p_hops = -1; /* use kernel default */ 181 } 182 else 183 #endif 184 inp->inp_vflag |= INP_IPV4; 185 tp = tcp_newtcpcb(inp); 186 if (tp == NULL) { 187 error = ENOBUFS; 188 in_pcbdetach(inp); 189 in_pcbfree(inp); 190 goto out; 191 } 192 tp->t_state = TCPS_CLOSED; 193 INP_WUNLOCK(inp); 194 TCPSTATES_INC(TCPS_CLOSED); 195 if ((so->so_options & SO_LINGER) && so->so_linger == 0) 196 so->so_linger = TCP_LINGERTIME; 197 out: 198 TCPDEBUG2(PRU_ATTACH); 199 TCP_PROBE2(debug__user, tp, PRU_ATTACH); 200 return (error); 201 } 202 203 /* 204 * tcp_usr_detach is called when the socket layer loses its final reference 205 * to the socket, be it a file descriptor reference, a reference from TCP, 206 * etc. At this point, there is only one case in which we will keep around 207 * inpcb state: time wait. 208 */ 209 static void 210 tcp_usr_detach(struct socket *so) 211 { 212 struct inpcb *inp; 213 struct tcpcb *tp; 214 215 inp = sotoinpcb(so); 216 KASSERT(inp != NULL, ("%s: inp == NULL", __func__)); 217 INP_WLOCK(inp); 218 KASSERT(so->so_pcb == inp && inp->inp_socket == so, 219 ("%s: socket %p inp %p mismatch", __func__, so, inp)); 220 221 tp = intotcpcb(inp); 222 223 if (inp->inp_flags & INP_TIMEWAIT) { 224 /* 225 * There are two cases to handle: one in which the time wait 226 * state is being discarded (INP_DROPPED), and one in which 227 * this connection will remain in timewait. In the former, 228 * it is time to discard all state (except tcptw, which has 229 * already been discarded by the timewait close code, which 230 * should be further up the call stack somewhere). In the 231 * latter case, we detach from the socket, but leave the pcb 232 * present until timewait ends. 233 * 234 * XXXRW: Would it be cleaner to free the tcptw here? 235 * 236 * Astute question indeed, from twtcp perspective there are 237 * four cases to consider: 238 * 239 * #1 tcp_usr_detach is called at tcptw creation time by 240 * tcp_twstart, then do not discard the newly created tcptw 241 * and leave inpcb present until timewait ends 242 * #2 tcp_usr_detach is called at tcptw creation time by 243 * tcp_twstart, but connection is local and tw will be 244 * discarded immediately 245 * #3 tcp_usr_detach is called at timewait end (or reuse) by 246 * tcp_twclose, then the tcptw has already been discarded 247 * (or reused) and inpcb is freed here 248 * #4 tcp_usr_detach is called() after timewait ends (or reuse) 249 * (e.g. by soclose), then tcptw has already been discarded 250 * (or reused) and inpcb is freed here 251 * 252 * In all three cases the tcptw should not be freed here. 253 */ 254 if (inp->inp_flags & INP_DROPPED) { 255 in_pcbdetach(inp); 256 if (__predict_true(tp == NULL)) { 257 in_pcbfree(inp); 258 } else { 259 /* 260 * This case should not happen as in TIMEWAIT 261 * state the inp should not be destroyed before 262 * its tcptw. If INVARIANTS is defined, panic. 263 */ 264 #ifdef INVARIANTS 265 panic("%s: Panic before an inp double-free: " 266 "INP_TIMEWAIT && INP_DROPPED && tp != NULL" 267 , __func__); 268 #else 269 log(LOG_ERR, "%s: Avoid an inp double-free: " 270 "INP_TIMEWAIT && INP_DROPPED && tp != NULL" 271 , __func__); 272 #endif 273 INP_WUNLOCK(inp); 274 } 275 } else { 276 in_pcbdetach(inp); 277 INP_WUNLOCK(inp); 278 } 279 } else { 280 /* 281 * If the connection is not in timewait, we consider two 282 * two conditions: one in which no further processing is 283 * necessary (dropped || embryonic), and one in which TCP is 284 * not yet done, but no longer requires the socket, so the 285 * pcb will persist for the time being. 286 * 287 * XXXRW: Does the second case still occur? 288 */ 289 if (inp->inp_flags & INP_DROPPED || 290 tp->t_state < TCPS_SYN_SENT) { 291 tcp_discardcb(tp); 292 in_pcbdetach(inp); 293 in_pcbfree(inp); 294 } else { 295 in_pcbdetach(inp); 296 INP_WUNLOCK(inp); 297 } 298 } 299 } 300 301 #ifdef INET 302 /* 303 * Give the socket an address. 304 */ 305 static int 306 tcp_usr_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 307 { 308 int error = 0; 309 struct inpcb *inp; 310 struct tcpcb *tp = NULL; 311 struct sockaddr_in *sinp; 312 313 sinp = (struct sockaddr_in *)nam; 314 if (nam->sa_len != sizeof (*sinp)) 315 return (EINVAL); 316 /* 317 * Must check for multicast addresses and disallow binding 318 * to them. 319 */ 320 if (sinp->sin_family == AF_INET && 321 IN_MULTICAST(ntohl(sinp->sin_addr.s_addr))) 322 return (EAFNOSUPPORT); 323 324 TCPDEBUG0; 325 inp = sotoinpcb(so); 326 KASSERT(inp != NULL, ("tcp_usr_bind: inp == NULL")); 327 INP_WLOCK(inp); 328 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 329 error = EINVAL; 330 goto out; 331 } 332 tp = intotcpcb(inp); 333 TCPDEBUG1(); 334 INP_HASH_WLOCK(&V_tcbinfo); 335 error = in_pcbbind(inp, nam, td->td_ucred); 336 INP_HASH_WUNLOCK(&V_tcbinfo); 337 out: 338 TCPDEBUG2(PRU_BIND); 339 TCP_PROBE2(debug__user, tp, PRU_BIND); 340 INP_WUNLOCK(inp); 341 342 return (error); 343 } 344 #endif /* INET */ 345 346 #ifdef INET6 347 static int 348 tcp6_usr_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 349 { 350 int error = 0; 351 struct inpcb *inp; 352 struct tcpcb *tp = NULL; 353 struct sockaddr_in6 *sin6; 354 u_char vflagsav; 355 356 sin6 = (struct sockaddr_in6 *)nam; 357 if (nam->sa_len != sizeof (*sin6)) 358 return (EINVAL); 359 /* 360 * Must check for multicast addresses and disallow binding 361 * to them. 362 */ 363 if (sin6->sin6_family == AF_INET6 && 364 IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 365 return (EAFNOSUPPORT); 366 367 TCPDEBUG0; 368 inp = sotoinpcb(so); 369 KASSERT(inp != NULL, ("tcp6_usr_bind: inp == NULL")); 370 INP_WLOCK(inp); 371 vflagsav = inp->inp_vflag; 372 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 373 error = EINVAL; 374 goto out; 375 } 376 tp = intotcpcb(inp); 377 TCPDEBUG1(); 378 INP_HASH_WLOCK(&V_tcbinfo); 379 inp->inp_vflag &= ~INP_IPV4; 380 inp->inp_vflag |= INP_IPV6; 381 #ifdef INET 382 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 383 if (IN6_IS_ADDR_UNSPECIFIED(&sin6->sin6_addr)) 384 inp->inp_vflag |= INP_IPV4; 385 else if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 386 struct sockaddr_in sin; 387 388 in6_sin6_2_sin(&sin, sin6); 389 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 390 error = EAFNOSUPPORT; 391 INP_HASH_WUNLOCK(&V_tcbinfo); 392 goto out; 393 } 394 inp->inp_vflag |= INP_IPV4; 395 inp->inp_vflag &= ~INP_IPV6; 396 error = in_pcbbind(inp, (struct sockaddr *)&sin, 397 td->td_ucred); 398 INP_HASH_WUNLOCK(&V_tcbinfo); 399 goto out; 400 } 401 } 402 #endif 403 error = in6_pcbbind(inp, nam, td->td_ucred); 404 INP_HASH_WUNLOCK(&V_tcbinfo); 405 out: 406 if (error != 0) 407 inp->inp_vflag = vflagsav; 408 TCPDEBUG2(PRU_BIND); 409 TCP_PROBE2(debug__user, tp, PRU_BIND); 410 INP_WUNLOCK(inp); 411 return (error); 412 } 413 #endif /* INET6 */ 414 415 #ifdef INET 416 /* 417 * Prepare to accept connections. 418 */ 419 static int 420 tcp_usr_listen(struct socket *so, int backlog, struct thread *td) 421 { 422 int error = 0; 423 struct inpcb *inp; 424 struct tcpcb *tp = NULL; 425 426 TCPDEBUG0; 427 inp = sotoinpcb(so); 428 KASSERT(inp != NULL, ("tcp_usr_listen: inp == NULL")); 429 INP_WLOCK(inp); 430 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 431 error = EINVAL; 432 goto out; 433 } 434 tp = intotcpcb(inp); 435 TCPDEBUG1(); 436 SOCK_LOCK(so); 437 error = solisten_proto_check(so); 438 INP_HASH_WLOCK(&V_tcbinfo); 439 if (error == 0 && inp->inp_lport == 0) 440 error = in_pcbbind(inp, (struct sockaddr *)0, td->td_ucred); 441 INP_HASH_WUNLOCK(&V_tcbinfo); 442 if (error == 0) { 443 tcp_state_change(tp, TCPS_LISTEN); 444 solisten_proto(so, backlog); 445 #ifdef TCP_OFFLOAD 446 if ((so->so_options & SO_NO_OFFLOAD) == 0) 447 tcp_offload_listen_start(tp); 448 #endif 449 } 450 SOCK_UNLOCK(so); 451 452 if (IS_FASTOPEN(tp->t_flags)) 453 tp->t_tfo_pending = tcp_fastopen_alloc_counter(); 454 455 out: 456 TCPDEBUG2(PRU_LISTEN); 457 TCP_PROBE2(debug__user, tp, PRU_LISTEN); 458 INP_WUNLOCK(inp); 459 return (error); 460 } 461 #endif /* INET */ 462 463 #ifdef INET6 464 static int 465 tcp6_usr_listen(struct socket *so, int backlog, struct thread *td) 466 { 467 int error = 0; 468 struct inpcb *inp; 469 struct tcpcb *tp = NULL; 470 u_char vflagsav; 471 472 TCPDEBUG0; 473 inp = sotoinpcb(so); 474 KASSERT(inp != NULL, ("tcp6_usr_listen: inp == NULL")); 475 INP_WLOCK(inp); 476 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 477 error = EINVAL; 478 goto out; 479 } 480 vflagsav = inp->inp_vflag; 481 tp = intotcpcb(inp); 482 TCPDEBUG1(); 483 SOCK_LOCK(so); 484 error = solisten_proto_check(so); 485 INP_HASH_WLOCK(&V_tcbinfo); 486 if (error == 0 && inp->inp_lport == 0) { 487 inp->inp_vflag &= ~INP_IPV4; 488 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) 489 inp->inp_vflag |= INP_IPV4; 490 error = in6_pcbbind(inp, (struct sockaddr *)0, td->td_ucred); 491 } 492 INP_HASH_WUNLOCK(&V_tcbinfo); 493 if (error == 0) { 494 tcp_state_change(tp, TCPS_LISTEN); 495 solisten_proto(so, backlog); 496 #ifdef TCP_OFFLOAD 497 if ((so->so_options & SO_NO_OFFLOAD) == 0) 498 tcp_offload_listen_start(tp); 499 #endif 500 } 501 SOCK_UNLOCK(so); 502 503 if (IS_FASTOPEN(tp->t_flags)) 504 tp->t_tfo_pending = tcp_fastopen_alloc_counter(); 505 506 if (error != 0) 507 inp->inp_vflag = vflagsav; 508 509 out: 510 TCPDEBUG2(PRU_LISTEN); 511 TCP_PROBE2(debug__user, tp, PRU_LISTEN); 512 INP_WUNLOCK(inp); 513 return (error); 514 } 515 #endif /* INET6 */ 516 517 #ifdef INET 518 /* 519 * Initiate connection to peer. 520 * Create a template for use in transmissions on this connection. 521 * Enter SYN_SENT state, and mark socket as connecting. 522 * Start keep-alive timer, and seed output sequence space. 523 * Send initial segment on connection. 524 */ 525 static int 526 tcp_usr_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 527 { 528 struct epoch_tracker et; 529 int error = 0; 530 struct inpcb *inp; 531 struct tcpcb *tp = NULL; 532 struct sockaddr_in *sinp; 533 534 sinp = (struct sockaddr_in *)nam; 535 if (nam->sa_len != sizeof (*sinp)) 536 return (EINVAL); 537 /* 538 * Must disallow TCP ``connections'' to multicast addresses. 539 */ 540 if (sinp->sin_family == AF_INET 541 && IN_MULTICAST(ntohl(sinp->sin_addr.s_addr))) 542 return (EAFNOSUPPORT); 543 if ((error = prison_remote_ip4(td->td_ucred, &sinp->sin_addr)) != 0) 544 return (error); 545 546 TCPDEBUG0; 547 inp = sotoinpcb(so); 548 KASSERT(inp != NULL, ("tcp_usr_connect: inp == NULL")); 549 INP_WLOCK(inp); 550 if (inp->inp_flags & INP_TIMEWAIT) { 551 error = EADDRINUSE; 552 goto out; 553 } 554 if (inp->inp_flags & INP_DROPPED) { 555 error = ECONNREFUSED; 556 goto out; 557 } 558 tp = intotcpcb(inp); 559 TCPDEBUG1(); 560 NET_EPOCH_ENTER(et); 561 if ((error = tcp_connect(tp, nam, td)) != 0) 562 goto out_in_epoch; 563 #ifdef TCP_OFFLOAD 564 if (registered_toedevs > 0 && 565 (so->so_options & SO_NO_OFFLOAD) == 0 && 566 (error = tcp_offload_connect(so, nam)) == 0) 567 goto out_in_epoch; 568 #endif 569 tcp_timer_activate(tp, TT_KEEP, TP_KEEPINIT(tp)); 570 error = tp->t_fb->tfb_tcp_output(tp); 571 out_in_epoch: 572 NET_EPOCH_EXIT(et); 573 out: 574 TCPDEBUG2(PRU_CONNECT); 575 TCP_PROBE2(debug__user, tp, PRU_CONNECT); 576 INP_WUNLOCK(inp); 577 return (error); 578 } 579 #endif /* INET */ 580 581 #ifdef INET6 582 static int 583 tcp6_usr_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 584 { 585 struct epoch_tracker et; 586 int error = 0; 587 struct inpcb *inp; 588 struct tcpcb *tp = NULL; 589 struct sockaddr_in6 *sin6; 590 u_int8_t incflagsav; 591 u_char vflagsav; 592 593 TCPDEBUG0; 594 595 sin6 = (struct sockaddr_in6 *)nam; 596 if (nam->sa_len != sizeof (*sin6)) 597 return (EINVAL); 598 /* 599 * Must disallow TCP ``connections'' to multicast addresses. 600 */ 601 if (sin6->sin6_family == AF_INET6 602 && IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) 603 return (EAFNOSUPPORT); 604 605 inp = sotoinpcb(so); 606 KASSERT(inp != NULL, ("tcp6_usr_connect: inp == NULL")); 607 INP_WLOCK(inp); 608 vflagsav = inp->inp_vflag; 609 incflagsav = inp->inp_inc.inc_flags; 610 if (inp->inp_flags & INP_TIMEWAIT) { 611 error = EADDRINUSE; 612 goto out; 613 } 614 if (inp->inp_flags & INP_DROPPED) { 615 error = ECONNREFUSED; 616 goto out; 617 } 618 tp = intotcpcb(inp); 619 TCPDEBUG1(); 620 #ifdef INET 621 /* 622 * XXXRW: Some confusion: V4/V6 flags relate to binding, and 623 * therefore probably require the hash lock, which isn't held here. 624 * Is this a significant problem? 625 */ 626 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 627 struct sockaddr_in sin; 628 629 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0) { 630 error = EINVAL; 631 goto out; 632 } 633 if ((inp->inp_vflag & INP_IPV4) == 0) { 634 error = EAFNOSUPPORT; 635 goto out; 636 } 637 638 in6_sin6_2_sin(&sin, sin6); 639 if (IN_MULTICAST(ntohl(sin.sin_addr.s_addr))) { 640 error = EAFNOSUPPORT; 641 goto out; 642 } 643 if ((error = prison_remote_ip4(td->td_ucred, 644 &sin.sin_addr)) != 0) 645 goto out; 646 inp->inp_vflag |= INP_IPV4; 647 inp->inp_vflag &= ~INP_IPV6; 648 NET_EPOCH_ENTER(et); 649 if ((error = tcp_connect(tp, (struct sockaddr *)&sin, td)) != 0) 650 goto out_in_epoch; 651 #ifdef TCP_OFFLOAD 652 if (registered_toedevs > 0 && 653 (so->so_options & SO_NO_OFFLOAD) == 0 && 654 (error = tcp_offload_connect(so, nam)) == 0) 655 goto out_in_epoch; 656 #endif 657 error = tp->t_fb->tfb_tcp_output(tp); 658 goto out_in_epoch; 659 } else { 660 if ((inp->inp_vflag & INP_IPV6) == 0) { 661 error = EAFNOSUPPORT; 662 goto out; 663 } 664 } 665 #endif 666 if ((error = prison_remote_ip6(td->td_ucred, &sin6->sin6_addr)) != 0) 667 goto out; 668 inp->inp_vflag &= ~INP_IPV4; 669 inp->inp_vflag |= INP_IPV6; 670 inp->inp_inc.inc_flags |= INC_ISIPV6; 671 if ((error = tcp6_connect(tp, nam, td)) != 0) 672 goto out; 673 #ifdef TCP_OFFLOAD 674 if (registered_toedevs > 0 && 675 (so->so_options & SO_NO_OFFLOAD) == 0 && 676 (error = tcp_offload_connect(so, nam)) == 0) 677 goto out; 678 #endif 679 tcp_timer_activate(tp, TT_KEEP, TP_KEEPINIT(tp)); 680 NET_EPOCH_ENTER(et); 681 error = tp->t_fb->tfb_tcp_output(tp); 682 #ifdef INET 683 out_in_epoch: 684 #endif 685 NET_EPOCH_EXIT(et); 686 out: 687 /* 688 * If the implicit bind in the connect call fails, restore 689 * the flags we modified. 690 */ 691 if (error != 0 && inp->inp_lport == 0) { 692 inp->inp_vflag = vflagsav; 693 inp->inp_inc.inc_flags = incflagsav; 694 } 695 696 TCPDEBUG2(PRU_CONNECT); 697 TCP_PROBE2(debug__user, tp, PRU_CONNECT); 698 INP_WUNLOCK(inp); 699 return (error); 700 } 701 #endif /* INET6 */ 702 703 /* 704 * Initiate disconnect from peer. 705 * If connection never passed embryonic stage, just drop; 706 * else if don't need to let data drain, then can just drop anyways, 707 * else have to begin TCP shutdown process: mark socket disconnecting, 708 * drain unread data, state switch to reflect user close, and 709 * send segment (e.g. FIN) to peer. Socket will be really disconnected 710 * when peer sends FIN and acks ours. 711 * 712 * SHOULD IMPLEMENT LATER PRU_CONNECT VIA REALLOC TCPCB. 713 */ 714 static int 715 tcp_usr_disconnect(struct socket *so) 716 { 717 struct inpcb *inp; 718 struct tcpcb *tp = NULL; 719 struct epoch_tracker et; 720 int error = 0; 721 722 TCPDEBUG0; 723 NET_EPOCH_ENTER(et); 724 inp = sotoinpcb(so); 725 KASSERT(inp != NULL, ("tcp_usr_disconnect: inp == NULL")); 726 INP_WLOCK(inp); 727 if (inp->inp_flags & INP_TIMEWAIT) 728 goto out; 729 if (inp->inp_flags & INP_DROPPED) { 730 error = ECONNRESET; 731 goto out; 732 } 733 tp = intotcpcb(inp); 734 TCPDEBUG1(); 735 tcp_disconnect(tp); 736 out: 737 TCPDEBUG2(PRU_DISCONNECT); 738 TCP_PROBE2(debug__user, tp, PRU_DISCONNECT); 739 INP_WUNLOCK(inp); 740 NET_EPOCH_EXIT(et); 741 return (error); 742 } 743 744 #ifdef INET 745 /* 746 * Accept a connection. Essentially all the work is done at higher levels; 747 * just return the address of the peer, storing through addr. 748 */ 749 static int 750 tcp_usr_accept(struct socket *so, struct sockaddr **nam) 751 { 752 int error = 0; 753 struct inpcb *inp = NULL; 754 struct tcpcb *tp = NULL; 755 struct in_addr addr; 756 in_port_t port = 0; 757 TCPDEBUG0; 758 759 if (so->so_state & SS_ISDISCONNECTED) 760 return (ECONNABORTED); 761 762 inp = sotoinpcb(so); 763 KASSERT(inp != NULL, ("tcp_usr_accept: inp == NULL")); 764 INP_WLOCK(inp); 765 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 766 error = ECONNABORTED; 767 goto out; 768 } 769 tp = intotcpcb(inp); 770 TCPDEBUG1(); 771 772 /* 773 * We inline in_getpeeraddr and COMMON_END here, so that we can 774 * copy the data of interest and defer the malloc until after we 775 * release the lock. 776 */ 777 port = inp->inp_fport; 778 addr = inp->inp_faddr; 779 780 out: 781 TCPDEBUG2(PRU_ACCEPT); 782 TCP_PROBE2(debug__user, tp, PRU_ACCEPT); 783 INP_WUNLOCK(inp); 784 if (error == 0) 785 *nam = in_sockaddr(port, &addr); 786 return error; 787 } 788 #endif /* INET */ 789 790 #ifdef INET6 791 static int 792 tcp6_usr_accept(struct socket *so, struct sockaddr **nam) 793 { 794 struct inpcb *inp = NULL; 795 int error = 0; 796 struct tcpcb *tp = NULL; 797 struct in_addr addr; 798 struct in6_addr addr6; 799 struct epoch_tracker et; 800 in_port_t port = 0; 801 int v4 = 0; 802 TCPDEBUG0; 803 804 if (so->so_state & SS_ISDISCONNECTED) 805 return (ECONNABORTED); 806 807 inp = sotoinpcb(so); 808 KASSERT(inp != NULL, ("tcp6_usr_accept: inp == NULL")); 809 NET_EPOCH_ENTER(et); 810 INP_WLOCK(inp); 811 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 812 error = ECONNABORTED; 813 goto out; 814 } 815 tp = intotcpcb(inp); 816 TCPDEBUG1(); 817 818 /* 819 * We inline in6_mapped_peeraddr and COMMON_END here, so that we can 820 * copy the data of interest and defer the malloc until after we 821 * release the lock. 822 */ 823 if (inp->inp_vflag & INP_IPV4) { 824 v4 = 1; 825 port = inp->inp_fport; 826 addr = inp->inp_faddr; 827 } else { 828 port = inp->inp_fport; 829 addr6 = inp->in6p_faddr; 830 } 831 832 out: 833 TCPDEBUG2(PRU_ACCEPT); 834 TCP_PROBE2(debug__user, tp, PRU_ACCEPT); 835 INP_WUNLOCK(inp); 836 NET_EPOCH_EXIT(et); 837 if (error == 0) { 838 if (v4) 839 *nam = in6_v4mapsin6_sockaddr(port, &addr); 840 else 841 *nam = in6_sockaddr(port, &addr6); 842 } 843 return error; 844 } 845 #endif /* INET6 */ 846 847 /* 848 * Mark the connection as being incapable of further output. 849 */ 850 static int 851 tcp_usr_shutdown(struct socket *so) 852 { 853 int error = 0; 854 struct inpcb *inp; 855 struct tcpcb *tp = NULL; 856 struct epoch_tracker et; 857 858 TCPDEBUG0; 859 NET_EPOCH_ENTER(et); 860 inp = sotoinpcb(so); 861 KASSERT(inp != NULL, ("inp == NULL")); 862 INP_WLOCK(inp); 863 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 864 error = ECONNRESET; 865 goto out; 866 } 867 tp = intotcpcb(inp); 868 TCPDEBUG1(); 869 socantsendmore(so); 870 tcp_usrclosed(tp); 871 if (!(inp->inp_flags & INP_DROPPED)) 872 error = tp->t_fb->tfb_tcp_output(tp); 873 874 out: 875 TCPDEBUG2(PRU_SHUTDOWN); 876 TCP_PROBE2(debug__user, tp, PRU_SHUTDOWN); 877 INP_WUNLOCK(inp); 878 NET_EPOCH_EXIT(et); 879 880 return (error); 881 } 882 883 /* 884 * After a receive, possibly send window update to peer. 885 */ 886 static int 887 tcp_usr_rcvd(struct socket *so, int flags) 888 { 889 struct epoch_tracker et; 890 struct inpcb *inp; 891 struct tcpcb *tp = NULL; 892 int error = 0; 893 894 TCPDEBUG0; 895 inp = sotoinpcb(so); 896 KASSERT(inp != NULL, ("tcp_usr_rcvd: inp == NULL")); 897 INP_WLOCK(inp); 898 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 899 error = ECONNRESET; 900 goto out; 901 } 902 tp = intotcpcb(inp); 903 TCPDEBUG1(); 904 /* 905 * For passively-created TFO connections, don't attempt a window 906 * update while still in SYN_RECEIVED as this may trigger an early 907 * SYN|ACK. It is preferable to have the SYN|ACK be sent along with 908 * application response data, or failing that, when the DELACK timer 909 * expires. 910 */ 911 if (IS_FASTOPEN(tp->t_flags) && 912 (tp->t_state == TCPS_SYN_RECEIVED)) 913 goto out; 914 NET_EPOCH_ENTER(et); 915 #ifdef TCP_OFFLOAD 916 if (tp->t_flags & TF_TOE) 917 tcp_offload_rcvd(tp); 918 else 919 #endif 920 tp->t_fb->tfb_tcp_output(tp); 921 NET_EPOCH_EXIT(et); 922 out: 923 TCPDEBUG2(PRU_RCVD); 924 TCP_PROBE2(debug__user, tp, PRU_RCVD); 925 INP_WUNLOCK(inp); 926 return (error); 927 } 928 929 /* 930 * Do a send by putting data in output queue and updating urgent 931 * marker if URG set. Possibly send more data. Unlike the other 932 * pru_*() routines, the mbuf chains are our responsibility. We 933 * must either enqueue them or free them. The other pru_* routines 934 * generally are caller-frees. 935 */ 936 static int 937 tcp_usr_send(struct socket *so, int flags, struct mbuf *m, 938 struct sockaddr *nam, struct mbuf *control, struct thread *td) 939 { 940 struct epoch_tracker et; 941 int error = 0; 942 struct inpcb *inp; 943 struct tcpcb *tp = NULL; 944 #ifdef INET 945 #ifdef INET6 946 struct sockaddr_in sin; 947 #endif 948 struct sockaddr_in *sinp; 949 #endif 950 #ifdef INET6 951 int isipv6; 952 #endif 953 u_int8_t incflagsav; 954 u_char vflagsav; 955 bool restoreflags; 956 TCPDEBUG0; 957 958 /* 959 * We require the pcbinfo "read lock" if we will close the socket 960 * as part of this call. 961 */ 962 NET_EPOCH_ENTER(et); 963 inp = sotoinpcb(so); 964 KASSERT(inp != NULL, ("tcp_usr_send: inp == NULL")); 965 INP_WLOCK(inp); 966 vflagsav = inp->inp_vflag; 967 incflagsav = inp->inp_inc.inc_flags; 968 restoreflags = false; 969 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 970 if (control) 971 m_freem(control); 972 /* 973 * In case of PRUS_NOTREADY, tcp_usr_ready() is responsible 974 * for freeing memory. 975 */ 976 if (m && (flags & PRUS_NOTREADY) == 0) 977 m_freem(m); 978 error = ECONNRESET; 979 goto out; 980 } 981 tp = intotcpcb(inp); 982 TCPDEBUG1(); 983 if (nam != NULL && tp->t_state < TCPS_SYN_SENT) { 984 switch (nam->sa_family) { 985 #ifdef INET 986 case AF_INET: 987 sinp = (struct sockaddr_in *)nam; 988 if (sinp->sin_len != sizeof(struct sockaddr_in)) { 989 if (m) 990 m_freem(m); 991 error = EINVAL; 992 goto out; 993 } 994 if ((inp->inp_vflag & INP_IPV6) != 0) { 995 if (m) 996 m_freem(m); 997 error = EAFNOSUPPORT; 998 goto out; 999 } 1000 if (IN_MULTICAST(ntohl(sinp->sin_addr.s_addr))) { 1001 if (m) 1002 m_freem(m); 1003 error = EAFNOSUPPORT; 1004 goto out; 1005 } 1006 if ((error = prison_remote_ip4(td->td_ucred, 1007 &sinp->sin_addr))) { 1008 if (m) 1009 m_freem(m); 1010 goto out; 1011 } 1012 #ifdef INET6 1013 isipv6 = 0; 1014 #endif 1015 break; 1016 #endif /* INET */ 1017 #ifdef INET6 1018 case AF_INET6: 1019 { 1020 struct sockaddr_in6 *sin6; 1021 1022 sin6 = (struct sockaddr_in6 *)nam; 1023 if (sin6->sin6_len != sizeof(*sin6)) { 1024 if (m) 1025 m_freem(m); 1026 error = EINVAL; 1027 goto out; 1028 } 1029 if (IN6_IS_ADDR_MULTICAST(&sin6->sin6_addr)) { 1030 if (m) 1031 m_freem(m); 1032 error = EAFNOSUPPORT; 1033 goto out; 1034 } 1035 if (IN6_IS_ADDR_V4MAPPED(&sin6->sin6_addr)) { 1036 #ifdef INET 1037 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0) { 1038 error = EINVAL; 1039 if (m) 1040 m_freem(m); 1041 goto out; 1042 } 1043 if ((inp->inp_vflag & INP_IPV4) == 0) { 1044 error = EAFNOSUPPORT; 1045 if (m) 1046 m_freem(m); 1047 goto out; 1048 } 1049 restoreflags = true; 1050 inp->inp_vflag &= ~INP_IPV6; 1051 sinp = &sin; 1052 in6_sin6_2_sin(sinp, sin6); 1053 if (IN_MULTICAST( 1054 ntohl(sinp->sin_addr.s_addr))) { 1055 error = EAFNOSUPPORT; 1056 if (m) 1057 m_freem(m); 1058 goto out; 1059 } 1060 if ((error = prison_remote_ip4(td->td_ucred, 1061 &sinp->sin_addr))) { 1062 if (m) 1063 m_freem(m); 1064 goto out; 1065 } 1066 isipv6 = 0; 1067 #else /* !INET */ 1068 error = EAFNOSUPPORT; 1069 if (m) 1070 m_freem(m); 1071 goto out; 1072 #endif /* INET */ 1073 } else { 1074 if ((inp->inp_vflag & INP_IPV6) == 0) { 1075 if (m) 1076 m_freem(m); 1077 error = EAFNOSUPPORT; 1078 goto out; 1079 } 1080 restoreflags = true; 1081 inp->inp_vflag &= ~INP_IPV4; 1082 inp->inp_inc.inc_flags |= INC_ISIPV6; 1083 if ((error = prison_remote_ip6(td->td_ucred, 1084 &sin6->sin6_addr))) { 1085 if (m) 1086 m_freem(m); 1087 goto out; 1088 } 1089 isipv6 = 1; 1090 } 1091 break; 1092 } 1093 #endif /* INET6 */ 1094 default: 1095 if (m) 1096 m_freem(m); 1097 error = EAFNOSUPPORT; 1098 goto out; 1099 } 1100 } 1101 if (control) { 1102 /* TCP doesn't do control messages (rights, creds, etc) */ 1103 if (control->m_len) { 1104 m_freem(control); 1105 if (m) 1106 m_freem(m); 1107 error = EINVAL; 1108 goto out; 1109 } 1110 m_freem(control); /* empty control, just free it */ 1111 } 1112 if (!(flags & PRUS_OOB)) { 1113 sbappendstream(&so->so_snd, m, flags); 1114 if (nam && tp->t_state < TCPS_SYN_SENT) { 1115 /* 1116 * Do implied connect if not yet connected, 1117 * initialize window to default value, and 1118 * initialize maxseg using peer's cached MSS. 1119 */ 1120 #ifdef INET6 1121 if (isipv6) 1122 error = tcp6_connect(tp, nam, td); 1123 #endif /* INET6 */ 1124 #if defined(INET6) && defined(INET) 1125 else 1126 #endif 1127 #ifdef INET 1128 error = tcp_connect(tp, 1129 (struct sockaddr *)sinp, td); 1130 #endif 1131 /* 1132 * The bind operation in tcp_connect succeeded. We 1133 * no longer want to restore the flags if later 1134 * operations fail. 1135 */ 1136 if (error == 0 || inp->inp_lport != 0) 1137 restoreflags = false; 1138 1139 if (error) 1140 goto out; 1141 if (IS_FASTOPEN(tp->t_flags)) 1142 tcp_fastopen_connect(tp); 1143 else { 1144 tp->snd_wnd = TTCP_CLIENT_SND_WND; 1145 tcp_mss(tp, -1); 1146 } 1147 } 1148 if (flags & PRUS_EOF) { 1149 /* 1150 * Close the send side of the connection after 1151 * the data is sent. 1152 */ 1153 socantsendmore(so); 1154 tcp_usrclosed(tp); 1155 } 1156 if (!(inp->inp_flags & INP_DROPPED) && 1157 !(flags & PRUS_NOTREADY)) { 1158 if (flags & PRUS_MORETOCOME) 1159 tp->t_flags |= TF_MORETOCOME; 1160 error = tp->t_fb->tfb_tcp_output(tp); 1161 if (flags & PRUS_MORETOCOME) 1162 tp->t_flags &= ~TF_MORETOCOME; 1163 } 1164 } else { 1165 /* 1166 * XXXRW: PRUS_EOF not implemented with PRUS_OOB? 1167 */ 1168 SOCKBUF_LOCK(&so->so_snd); 1169 if (sbspace(&so->so_snd) < -512) { 1170 SOCKBUF_UNLOCK(&so->so_snd); 1171 m_freem(m); 1172 error = ENOBUFS; 1173 goto out; 1174 } 1175 /* 1176 * According to RFC961 (Assigned Protocols), 1177 * the urgent pointer points to the last octet 1178 * of urgent data. We continue, however, 1179 * to consider it to indicate the first octet 1180 * of data past the urgent section. 1181 * Otherwise, snd_up should be one lower. 1182 */ 1183 sbappendstream_locked(&so->so_snd, m, flags); 1184 SOCKBUF_UNLOCK(&so->so_snd); 1185 if (nam && tp->t_state < TCPS_SYN_SENT) { 1186 /* 1187 * Do implied connect if not yet connected, 1188 * initialize window to default value, and 1189 * initialize maxseg using peer's cached MSS. 1190 */ 1191 1192 /* 1193 * Not going to contemplate SYN|URG 1194 */ 1195 if (IS_FASTOPEN(tp->t_flags)) 1196 tp->t_flags &= ~TF_FASTOPEN; 1197 #ifdef INET6 1198 if (isipv6) 1199 error = tcp6_connect(tp, nam, td); 1200 #endif /* INET6 */ 1201 #if defined(INET6) && defined(INET) 1202 else 1203 #endif 1204 #ifdef INET 1205 error = tcp_connect(tp, 1206 (struct sockaddr *)sinp, td); 1207 #endif 1208 /* 1209 * The bind operation in tcp_connect succeeded. We 1210 * no longer want to restore the flags if later 1211 * operations fail. 1212 */ 1213 if (error == 0 || inp->inp_lport != 0) 1214 restoreflags = false; 1215 1216 if (error) 1217 goto out; 1218 tp->snd_wnd = TTCP_CLIENT_SND_WND; 1219 tcp_mss(tp, -1); 1220 } 1221 tp->snd_up = tp->snd_una + sbavail(&so->so_snd); 1222 if (!(flags & PRUS_NOTREADY)) { 1223 tp->t_flags |= TF_FORCEDATA; 1224 error = tp->t_fb->tfb_tcp_output(tp); 1225 tp->t_flags &= ~TF_FORCEDATA; 1226 } 1227 } 1228 TCP_LOG_EVENT(tp, NULL, 1229 &inp->inp_socket->so_rcv, 1230 &inp->inp_socket->so_snd, 1231 TCP_LOG_USERSEND, error, 1232 0, NULL, false); 1233 out: 1234 /* 1235 * If the request was unsuccessful and we changed flags, 1236 * restore the original flags. 1237 */ 1238 if (error != 0 && restoreflags) { 1239 inp->inp_vflag = vflagsav; 1240 inp->inp_inc.inc_flags = incflagsav; 1241 } 1242 TCPDEBUG2((flags & PRUS_OOB) ? PRU_SENDOOB : 1243 ((flags & PRUS_EOF) ? PRU_SEND_EOF : PRU_SEND)); 1244 TCP_PROBE2(debug__user, tp, (flags & PRUS_OOB) ? PRU_SENDOOB : 1245 ((flags & PRUS_EOF) ? PRU_SEND_EOF : PRU_SEND)); 1246 INP_WUNLOCK(inp); 1247 NET_EPOCH_EXIT(et); 1248 return (error); 1249 } 1250 1251 static int 1252 tcp_usr_ready(struct socket *so, struct mbuf *m, int count) 1253 { 1254 struct epoch_tracker et; 1255 struct inpcb *inp; 1256 struct tcpcb *tp; 1257 int error; 1258 1259 inp = sotoinpcb(so); 1260 INP_WLOCK(inp); 1261 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 1262 INP_WUNLOCK(inp); 1263 mb_free_notready(m, count); 1264 return (ECONNRESET); 1265 } 1266 tp = intotcpcb(inp); 1267 1268 SOCKBUF_LOCK(&so->so_snd); 1269 error = sbready(&so->so_snd, m, count); 1270 SOCKBUF_UNLOCK(&so->so_snd); 1271 if (error == 0) { 1272 NET_EPOCH_ENTER(et); 1273 error = tp->t_fb->tfb_tcp_output(tp); 1274 NET_EPOCH_EXIT(et); 1275 } 1276 INP_WUNLOCK(inp); 1277 1278 return (error); 1279 } 1280 1281 /* 1282 * Abort the TCP. Drop the connection abruptly. 1283 */ 1284 static void 1285 tcp_usr_abort(struct socket *so) 1286 { 1287 struct inpcb *inp; 1288 struct tcpcb *tp = NULL; 1289 struct epoch_tracker et; 1290 TCPDEBUG0; 1291 1292 inp = sotoinpcb(so); 1293 KASSERT(inp != NULL, ("tcp_usr_abort: inp == NULL")); 1294 1295 NET_EPOCH_ENTER(et); 1296 INP_WLOCK(inp); 1297 KASSERT(inp->inp_socket != NULL, 1298 ("tcp_usr_abort: inp_socket == NULL")); 1299 1300 /* 1301 * If we still have full TCP state, and we're not dropped, drop. 1302 */ 1303 if (!(inp->inp_flags & INP_TIMEWAIT) && 1304 !(inp->inp_flags & INP_DROPPED)) { 1305 tp = intotcpcb(inp); 1306 TCPDEBUG1(); 1307 tp = tcp_drop(tp, ECONNABORTED); 1308 if (tp == NULL) 1309 goto dropped; 1310 TCPDEBUG2(PRU_ABORT); 1311 TCP_PROBE2(debug__user, tp, PRU_ABORT); 1312 } 1313 if (!(inp->inp_flags & INP_DROPPED)) { 1314 SOCK_LOCK(so); 1315 so->so_state |= SS_PROTOREF; 1316 SOCK_UNLOCK(so); 1317 inp->inp_flags |= INP_SOCKREF; 1318 } 1319 INP_WUNLOCK(inp); 1320 dropped: 1321 NET_EPOCH_EXIT(et); 1322 } 1323 1324 /* 1325 * TCP socket is closed. Start friendly disconnect. 1326 */ 1327 static void 1328 tcp_usr_close(struct socket *so) 1329 { 1330 struct inpcb *inp; 1331 struct tcpcb *tp = NULL; 1332 struct epoch_tracker et; 1333 TCPDEBUG0; 1334 1335 inp = sotoinpcb(so); 1336 KASSERT(inp != NULL, ("tcp_usr_close: inp == NULL")); 1337 1338 NET_EPOCH_ENTER(et); 1339 INP_WLOCK(inp); 1340 KASSERT(inp->inp_socket != NULL, 1341 ("tcp_usr_close: inp_socket == NULL")); 1342 1343 /* 1344 * If we still have full TCP state, and we're not dropped, initiate 1345 * a disconnect. 1346 */ 1347 if (!(inp->inp_flags & INP_TIMEWAIT) && 1348 !(inp->inp_flags & INP_DROPPED)) { 1349 tp = intotcpcb(inp); 1350 TCPDEBUG1(); 1351 tcp_disconnect(tp); 1352 TCPDEBUG2(PRU_CLOSE); 1353 TCP_PROBE2(debug__user, tp, PRU_CLOSE); 1354 } 1355 if (!(inp->inp_flags & INP_DROPPED)) { 1356 SOCK_LOCK(so); 1357 so->so_state |= SS_PROTOREF; 1358 SOCK_UNLOCK(so); 1359 inp->inp_flags |= INP_SOCKREF; 1360 } 1361 INP_WUNLOCK(inp); 1362 NET_EPOCH_EXIT(et); 1363 } 1364 1365 /* 1366 * Receive out-of-band data. 1367 */ 1368 static int 1369 tcp_usr_rcvoob(struct socket *so, struct mbuf *m, int flags) 1370 { 1371 int error = 0; 1372 struct inpcb *inp; 1373 struct tcpcb *tp = NULL; 1374 1375 TCPDEBUG0; 1376 inp = sotoinpcb(so); 1377 KASSERT(inp != NULL, ("tcp_usr_rcvoob: inp == NULL")); 1378 INP_WLOCK(inp); 1379 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 1380 error = ECONNRESET; 1381 goto out; 1382 } 1383 tp = intotcpcb(inp); 1384 TCPDEBUG1(); 1385 if ((so->so_oobmark == 0 && 1386 (so->so_rcv.sb_state & SBS_RCVATMARK) == 0) || 1387 so->so_options & SO_OOBINLINE || 1388 tp->t_oobflags & TCPOOB_HADDATA) { 1389 error = EINVAL; 1390 goto out; 1391 } 1392 if ((tp->t_oobflags & TCPOOB_HAVEDATA) == 0) { 1393 error = EWOULDBLOCK; 1394 goto out; 1395 } 1396 m->m_len = 1; 1397 *mtod(m, caddr_t) = tp->t_iobc; 1398 if ((flags & MSG_PEEK) == 0) 1399 tp->t_oobflags ^= (TCPOOB_HAVEDATA | TCPOOB_HADDATA); 1400 1401 out: 1402 TCPDEBUG2(PRU_RCVOOB); 1403 TCP_PROBE2(debug__user, tp, PRU_RCVOOB); 1404 INP_WUNLOCK(inp); 1405 return (error); 1406 } 1407 1408 #ifdef INET 1409 struct pr_usrreqs tcp_usrreqs = { 1410 .pru_abort = tcp_usr_abort, 1411 .pru_accept = tcp_usr_accept, 1412 .pru_attach = tcp_usr_attach, 1413 .pru_bind = tcp_usr_bind, 1414 .pru_connect = tcp_usr_connect, 1415 .pru_control = in_control, 1416 .pru_detach = tcp_usr_detach, 1417 .pru_disconnect = tcp_usr_disconnect, 1418 .pru_listen = tcp_usr_listen, 1419 .pru_peeraddr = in_getpeeraddr, 1420 .pru_rcvd = tcp_usr_rcvd, 1421 .pru_rcvoob = tcp_usr_rcvoob, 1422 .pru_send = tcp_usr_send, 1423 .pru_ready = tcp_usr_ready, 1424 .pru_shutdown = tcp_usr_shutdown, 1425 .pru_sockaddr = in_getsockaddr, 1426 .pru_sosetlabel = in_pcbsosetlabel, 1427 .pru_close = tcp_usr_close, 1428 }; 1429 #endif /* INET */ 1430 1431 #ifdef INET6 1432 struct pr_usrreqs tcp6_usrreqs = { 1433 .pru_abort = tcp_usr_abort, 1434 .pru_accept = tcp6_usr_accept, 1435 .pru_attach = tcp_usr_attach, 1436 .pru_bind = tcp6_usr_bind, 1437 .pru_connect = tcp6_usr_connect, 1438 .pru_control = in6_control, 1439 .pru_detach = tcp_usr_detach, 1440 .pru_disconnect = tcp_usr_disconnect, 1441 .pru_listen = tcp6_usr_listen, 1442 .pru_peeraddr = in6_mapped_peeraddr, 1443 .pru_rcvd = tcp_usr_rcvd, 1444 .pru_rcvoob = tcp_usr_rcvoob, 1445 .pru_send = tcp_usr_send, 1446 .pru_ready = tcp_usr_ready, 1447 .pru_shutdown = tcp_usr_shutdown, 1448 .pru_sockaddr = in6_mapped_sockaddr, 1449 .pru_sosetlabel = in_pcbsosetlabel, 1450 .pru_close = tcp_usr_close, 1451 }; 1452 #endif /* INET6 */ 1453 1454 #ifdef INET 1455 /* 1456 * Common subroutine to open a TCP connection to remote host specified 1457 * by struct sockaddr_in in mbuf *nam. Call in_pcbbind to assign a local 1458 * port number if needed. Call in_pcbconnect_setup to do the routing and 1459 * to choose a local host address (interface). If there is an existing 1460 * incarnation of the same connection in TIME-WAIT state and if the remote 1461 * host was sending CC options and if the connection duration was < MSL, then 1462 * truncate the previous TIME-WAIT state and proceed. 1463 * Initialize connection parameters and enter SYN-SENT state. 1464 */ 1465 static int 1466 tcp_connect(struct tcpcb *tp, struct sockaddr *nam, struct thread *td) 1467 { 1468 struct inpcb *inp = tp->t_inpcb, *oinp; 1469 struct socket *so = inp->inp_socket; 1470 struct in_addr laddr; 1471 u_short lport; 1472 int error; 1473 1474 NET_EPOCH_ASSERT(); 1475 INP_WLOCK_ASSERT(inp); 1476 INP_HASH_WLOCK(&V_tcbinfo); 1477 1478 if (inp->inp_lport == 0) { 1479 error = in_pcbbind(inp, (struct sockaddr *)0, td->td_ucred); 1480 if (error) 1481 goto out; 1482 } 1483 1484 /* 1485 * Cannot simply call in_pcbconnect, because there might be an 1486 * earlier incarnation of this same connection still in 1487 * TIME_WAIT state, creating an ADDRINUSE error. 1488 */ 1489 laddr = inp->inp_laddr; 1490 lport = inp->inp_lport; 1491 error = in_pcbconnect_setup(inp, nam, &laddr.s_addr, &lport, 1492 &inp->inp_faddr.s_addr, &inp->inp_fport, &oinp, td->td_ucred); 1493 if (error && oinp == NULL) 1494 goto out; 1495 if (oinp) { 1496 error = EADDRINUSE; 1497 goto out; 1498 } 1499 inp->inp_laddr = laddr; 1500 in_pcbrehash(inp); 1501 INP_HASH_WUNLOCK(&V_tcbinfo); 1502 1503 /* 1504 * Compute window scaling to request: 1505 * Scale to fit into sweet spot. See tcp_syncache.c. 1506 * XXX: This should move to tcp_output(). 1507 */ 1508 while (tp->request_r_scale < TCP_MAX_WINSHIFT && 1509 (TCP_MAXWIN << tp->request_r_scale) < sb_max) 1510 tp->request_r_scale++; 1511 1512 soisconnecting(so); 1513 TCPSTAT_INC(tcps_connattempt); 1514 tcp_state_change(tp, TCPS_SYN_SENT); 1515 tp->iss = tcp_new_isn(&inp->inp_inc); 1516 if (tp->t_flags & TF_REQ_TSTMP) 1517 tp->ts_offset = tcp_new_ts_offset(&inp->inp_inc); 1518 tcp_sendseqinit(tp); 1519 1520 return 0; 1521 1522 out: 1523 INP_HASH_WUNLOCK(&V_tcbinfo); 1524 return (error); 1525 } 1526 #endif /* INET */ 1527 1528 #ifdef INET6 1529 static int 1530 tcp6_connect(struct tcpcb *tp, struct sockaddr *nam, struct thread *td) 1531 { 1532 struct inpcb *inp = tp->t_inpcb; 1533 int error; 1534 1535 INP_WLOCK_ASSERT(inp); 1536 INP_HASH_WLOCK(&V_tcbinfo); 1537 1538 if (inp->inp_lport == 0) { 1539 error = in6_pcbbind(inp, (struct sockaddr *)0, td->td_ucred); 1540 if (error) 1541 goto out; 1542 } 1543 error = in6_pcbconnect(inp, nam, td->td_ucred); 1544 if (error != 0) 1545 goto out; 1546 INP_HASH_WUNLOCK(&V_tcbinfo); 1547 1548 /* Compute window scaling to request. */ 1549 while (tp->request_r_scale < TCP_MAX_WINSHIFT && 1550 (TCP_MAXWIN << tp->request_r_scale) < sb_max) 1551 tp->request_r_scale++; 1552 1553 soisconnecting(inp->inp_socket); 1554 TCPSTAT_INC(tcps_connattempt); 1555 tcp_state_change(tp, TCPS_SYN_SENT); 1556 tp->iss = tcp_new_isn(&inp->inp_inc); 1557 if (tp->t_flags & TF_REQ_TSTMP) 1558 tp->ts_offset = tcp_new_ts_offset(&inp->inp_inc); 1559 tcp_sendseqinit(tp); 1560 1561 return 0; 1562 1563 out: 1564 INP_HASH_WUNLOCK(&V_tcbinfo); 1565 return error; 1566 } 1567 #endif /* INET6 */ 1568 1569 /* 1570 * Export TCP internal state information via a struct tcp_info, based on the 1571 * Linux 2.6 API. Not ABI compatible as our constants are mapped differently 1572 * (TCP state machine, etc). We export all information using FreeBSD-native 1573 * constants -- for example, the numeric values for tcpi_state will differ 1574 * from Linux. 1575 */ 1576 static void 1577 tcp_fill_info(struct tcpcb *tp, struct tcp_info *ti) 1578 { 1579 1580 INP_WLOCK_ASSERT(tp->t_inpcb); 1581 bzero(ti, sizeof(*ti)); 1582 1583 ti->tcpi_state = tp->t_state; 1584 if ((tp->t_flags & TF_REQ_TSTMP) && (tp->t_flags & TF_RCVD_TSTMP)) 1585 ti->tcpi_options |= TCPI_OPT_TIMESTAMPS; 1586 if (tp->t_flags & TF_SACK_PERMIT) 1587 ti->tcpi_options |= TCPI_OPT_SACK; 1588 if ((tp->t_flags & TF_REQ_SCALE) && (tp->t_flags & TF_RCVD_SCALE)) { 1589 ti->tcpi_options |= TCPI_OPT_WSCALE; 1590 ti->tcpi_snd_wscale = tp->snd_scale; 1591 ti->tcpi_rcv_wscale = tp->rcv_scale; 1592 } 1593 if (tp->t_flags2 & TF2_ECN_PERMIT) 1594 ti->tcpi_options |= TCPI_OPT_ECN; 1595 1596 ti->tcpi_rto = tp->t_rxtcur * tick; 1597 ti->tcpi_last_data_recv = ((uint32_t)ticks - tp->t_rcvtime) * tick; 1598 ti->tcpi_rtt = ((u_int64_t)tp->t_srtt * tick) >> TCP_RTT_SHIFT; 1599 ti->tcpi_rttvar = ((u_int64_t)tp->t_rttvar * tick) >> TCP_RTTVAR_SHIFT; 1600 1601 ti->tcpi_snd_ssthresh = tp->snd_ssthresh; 1602 ti->tcpi_snd_cwnd = tp->snd_cwnd; 1603 1604 /* 1605 * FreeBSD-specific extension fields for tcp_info. 1606 */ 1607 ti->tcpi_rcv_space = tp->rcv_wnd; 1608 ti->tcpi_rcv_nxt = tp->rcv_nxt; 1609 ti->tcpi_snd_wnd = tp->snd_wnd; 1610 ti->tcpi_snd_bwnd = 0; /* Unused, kept for compat. */ 1611 ti->tcpi_snd_nxt = tp->snd_nxt; 1612 ti->tcpi_snd_mss = tp->t_maxseg; 1613 ti->tcpi_rcv_mss = tp->t_maxseg; 1614 ti->tcpi_snd_rexmitpack = tp->t_sndrexmitpack; 1615 ti->tcpi_rcv_ooopack = tp->t_rcvoopack; 1616 ti->tcpi_snd_zerowin = tp->t_sndzerowin; 1617 #ifdef TCP_OFFLOAD 1618 if (tp->t_flags & TF_TOE) { 1619 ti->tcpi_options |= TCPI_OPT_TOE; 1620 tcp_offload_tcp_info(tp, ti); 1621 } 1622 #endif 1623 } 1624 1625 /* 1626 * tcp_ctloutput() must drop the inpcb lock before performing copyin on 1627 * socket option arguments. When it re-acquires the lock after the copy, it 1628 * has to revalidate that the connection is still valid for the socket 1629 * option. 1630 */ 1631 #define INP_WLOCK_RECHECK_CLEANUP(inp, cleanup) do { \ 1632 INP_WLOCK(inp); \ 1633 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { \ 1634 INP_WUNLOCK(inp); \ 1635 cleanup; \ 1636 return (ECONNRESET); \ 1637 } \ 1638 tp = intotcpcb(inp); \ 1639 } while(0) 1640 #define INP_WLOCK_RECHECK(inp) INP_WLOCK_RECHECK_CLEANUP((inp), /* noop */) 1641 1642 int 1643 tcp_ctloutput(struct socket *so, struct sockopt *sopt) 1644 { 1645 int error; 1646 struct inpcb *inp; 1647 struct tcpcb *tp; 1648 struct tcp_function_block *blk; 1649 struct tcp_function_set fsn; 1650 1651 error = 0; 1652 inp = sotoinpcb(so); 1653 KASSERT(inp != NULL, ("tcp_ctloutput: inp == NULL")); 1654 if (sopt->sopt_level != IPPROTO_TCP) { 1655 #ifdef INET6 1656 if (inp->inp_vflag & INP_IPV6PROTO) { 1657 error = ip6_ctloutput(so, sopt); 1658 /* 1659 * In case of the IPV6_USE_MIN_MTU socket option, 1660 * the INC_IPV6MINMTU flag to announce a corresponding 1661 * MSS during the initial handshake. 1662 * If the TCP connection is not in the front states, 1663 * just reduce the MSS being used. 1664 * This avoids the sending of TCP segments which will 1665 * be fragmented at the IPv6 layer. 1666 */ 1667 if ((error == 0) && 1668 (sopt->sopt_dir == SOPT_SET) && 1669 (sopt->sopt_level == IPPROTO_IPV6) && 1670 (sopt->sopt_name == IPV6_USE_MIN_MTU)) { 1671 INP_WLOCK(inp); 1672 if ((inp->inp_flags & 1673 (INP_TIMEWAIT | INP_DROPPED))) { 1674 INP_WUNLOCK(inp); 1675 return (ECONNRESET); 1676 } 1677 inp->inp_inc.inc_flags |= INC_IPV6MINMTU; 1678 tp = intotcpcb(inp); 1679 if ((tp->t_state >= TCPS_SYN_SENT) && 1680 (inp->inp_inc.inc_flags & INC_ISIPV6)) { 1681 struct ip6_pktopts *opt; 1682 1683 opt = inp->in6p_outputopts; 1684 if ((opt != NULL) && 1685 (opt->ip6po_minmtu == 1686 IP6PO_MINMTU_ALL)) { 1687 if (tp->t_maxseg > TCP6_MSS) { 1688 tp->t_maxseg = TCP6_MSS; 1689 } 1690 } 1691 } 1692 INP_WUNLOCK(inp); 1693 } 1694 } 1695 #endif /* INET6 */ 1696 #if defined(INET6) && defined(INET) 1697 else 1698 #endif 1699 #ifdef INET 1700 { 1701 error = ip_ctloutput(so, sopt); 1702 } 1703 #endif 1704 return (error); 1705 } 1706 INP_WLOCK(inp); 1707 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 1708 INP_WUNLOCK(inp); 1709 return (ECONNRESET); 1710 } 1711 tp = intotcpcb(inp); 1712 /* 1713 * Protect the TCP option TCP_FUNCTION_BLK so 1714 * that a sub-function can *never* overwrite this. 1715 */ 1716 if ((sopt->sopt_dir == SOPT_SET) && 1717 (sopt->sopt_name == TCP_FUNCTION_BLK)) { 1718 INP_WUNLOCK(inp); 1719 error = sooptcopyin(sopt, &fsn, sizeof fsn, 1720 sizeof fsn); 1721 if (error) 1722 return (error); 1723 INP_WLOCK_RECHECK(inp); 1724 blk = find_and_ref_tcp_functions(&fsn); 1725 if (blk == NULL) { 1726 INP_WUNLOCK(inp); 1727 return (ENOENT); 1728 } 1729 if (tp->t_fb == blk) { 1730 /* You already have this */ 1731 refcount_release(&blk->tfb_refcnt); 1732 INP_WUNLOCK(inp); 1733 return (0); 1734 } 1735 if (tp->t_state != TCPS_CLOSED) { 1736 /* 1737 * The user has advanced the state 1738 * past the initial point, we may not 1739 * be able to switch. 1740 */ 1741 if (blk->tfb_tcp_handoff_ok != NULL) { 1742 /* 1743 * Does the stack provide a 1744 * query mechanism, if so it may 1745 * still be possible? 1746 */ 1747 error = (*blk->tfb_tcp_handoff_ok)(tp); 1748 } else 1749 error = EINVAL; 1750 if (error) { 1751 refcount_release(&blk->tfb_refcnt); 1752 INP_WUNLOCK(inp); 1753 return(error); 1754 } 1755 } 1756 if (blk->tfb_flags & TCP_FUNC_BEING_REMOVED) { 1757 refcount_release(&blk->tfb_refcnt); 1758 INP_WUNLOCK(inp); 1759 return (ENOENT); 1760 } 1761 /* 1762 * Release the old refcnt, the 1763 * lookup acquired a ref on the 1764 * new one already. 1765 */ 1766 if (tp->t_fb->tfb_tcp_fb_fini) { 1767 /* 1768 * Tell the stack to cleanup with 0 i.e. 1769 * the tcb is not going away. 1770 */ 1771 (*tp->t_fb->tfb_tcp_fb_fini)(tp, 0); 1772 } 1773 #ifdef TCPHPTS 1774 /* Assure that we are not on any hpts */ 1775 tcp_hpts_remove(tp->t_inpcb, HPTS_REMOVE_ALL); 1776 #endif 1777 if (blk->tfb_tcp_fb_init) { 1778 error = (*blk->tfb_tcp_fb_init)(tp); 1779 if (error) { 1780 refcount_release(&blk->tfb_refcnt); 1781 if (tp->t_fb->tfb_tcp_fb_init) { 1782 if((*tp->t_fb->tfb_tcp_fb_init)(tp) != 0) { 1783 /* Fall back failed, drop the connection */ 1784 INP_WUNLOCK(inp); 1785 soabort(so); 1786 return(error); 1787 } 1788 } 1789 goto err_out; 1790 } 1791 } 1792 refcount_release(&tp->t_fb->tfb_refcnt); 1793 tp->t_fb = blk; 1794 #ifdef TCP_OFFLOAD 1795 if (tp->t_flags & TF_TOE) { 1796 tcp_offload_ctloutput(tp, sopt->sopt_dir, 1797 sopt->sopt_name); 1798 } 1799 #endif 1800 err_out: 1801 INP_WUNLOCK(inp); 1802 return (error); 1803 } else if ((sopt->sopt_dir == SOPT_GET) && 1804 (sopt->sopt_name == TCP_FUNCTION_BLK)) { 1805 strncpy(fsn.function_set_name, tp->t_fb->tfb_tcp_block_name, 1806 TCP_FUNCTION_NAME_LEN_MAX); 1807 fsn.function_set_name[TCP_FUNCTION_NAME_LEN_MAX - 1] = '\0'; 1808 fsn.pcbcnt = tp->t_fb->tfb_refcnt; 1809 INP_WUNLOCK(inp); 1810 error = sooptcopyout(sopt, &fsn, sizeof fsn); 1811 return (error); 1812 } 1813 /* Pass in the INP locked, called must unlock it */ 1814 return (tp->t_fb->tfb_tcp_ctloutput(so, sopt, inp, tp)); 1815 } 1816 1817 /* 1818 * If this assert becomes untrue, we need to change the size of the buf 1819 * variable in tcp_default_ctloutput(). 1820 */ 1821 #ifdef CTASSERT 1822 CTASSERT(TCP_CA_NAME_MAX <= TCP_LOG_ID_LEN); 1823 CTASSERT(TCP_LOG_REASON_LEN <= TCP_LOG_ID_LEN); 1824 #endif 1825 1826 int 1827 tcp_default_ctloutput(struct socket *so, struct sockopt *sopt, struct inpcb *inp, struct tcpcb *tp) 1828 { 1829 int error, opt, optval; 1830 u_int ui; 1831 struct tcp_info ti; 1832 #ifdef KERN_TLS 1833 struct tls_enable tls; 1834 #endif 1835 struct cc_algo *algo; 1836 char *pbuf, buf[TCP_LOG_ID_LEN]; 1837 #ifdef STATS 1838 struct statsblob *sbp; 1839 #endif 1840 size_t len; 1841 1842 /* 1843 * For TCP_CCALGOOPT forward the control to CC module, for both 1844 * SOPT_SET and SOPT_GET. 1845 */ 1846 switch (sopt->sopt_name) { 1847 case TCP_CCALGOOPT: 1848 INP_WUNLOCK(inp); 1849 if (sopt->sopt_valsize > CC_ALGOOPT_LIMIT) 1850 return (EINVAL); 1851 pbuf = malloc(sopt->sopt_valsize, M_TEMP, M_WAITOK | M_ZERO); 1852 error = sooptcopyin(sopt, pbuf, sopt->sopt_valsize, 1853 sopt->sopt_valsize); 1854 if (error) { 1855 free(pbuf, M_TEMP); 1856 return (error); 1857 } 1858 INP_WLOCK_RECHECK_CLEANUP(inp, free(pbuf, M_TEMP)); 1859 if (CC_ALGO(tp)->ctl_output != NULL) 1860 error = CC_ALGO(tp)->ctl_output(tp->ccv, sopt, pbuf); 1861 else 1862 error = ENOENT; 1863 INP_WUNLOCK(inp); 1864 if (error == 0 && sopt->sopt_dir == SOPT_GET) 1865 error = sooptcopyout(sopt, pbuf, sopt->sopt_valsize); 1866 free(pbuf, M_TEMP); 1867 return (error); 1868 } 1869 1870 switch (sopt->sopt_dir) { 1871 case SOPT_SET: 1872 switch (sopt->sopt_name) { 1873 #if defined(IPSEC_SUPPORT) || defined(TCP_SIGNATURE) 1874 case TCP_MD5SIG: 1875 if (!TCPMD5_ENABLED()) { 1876 INP_WUNLOCK(inp); 1877 return (ENOPROTOOPT); 1878 } 1879 error = TCPMD5_PCBCTL(inp, sopt); 1880 if (error) 1881 return (error); 1882 goto unlock_and_done; 1883 #endif /* IPSEC */ 1884 1885 case TCP_NODELAY: 1886 case TCP_NOOPT: 1887 INP_WUNLOCK(inp); 1888 error = sooptcopyin(sopt, &optval, sizeof optval, 1889 sizeof optval); 1890 if (error) 1891 return (error); 1892 1893 INP_WLOCK_RECHECK(inp); 1894 switch (sopt->sopt_name) { 1895 case TCP_NODELAY: 1896 opt = TF_NODELAY; 1897 break; 1898 case TCP_NOOPT: 1899 opt = TF_NOOPT; 1900 break; 1901 default: 1902 opt = 0; /* dead code to fool gcc */ 1903 break; 1904 } 1905 1906 if (optval) 1907 tp->t_flags |= opt; 1908 else 1909 tp->t_flags &= ~opt; 1910 unlock_and_done: 1911 #ifdef TCP_OFFLOAD 1912 if (tp->t_flags & TF_TOE) { 1913 tcp_offload_ctloutput(tp, sopt->sopt_dir, 1914 sopt->sopt_name); 1915 } 1916 #endif 1917 INP_WUNLOCK(inp); 1918 break; 1919 1920 case TCP_NOPUSH: 1921 INP_WUNLOCK(inp); 1922 error = sooptcopyin(sopt, &optval, sizeof optval, 1923 sizeof optval); 1924 if (error) 1925 return (error); 1926 1927 INP_WLOCK_RECHECK(inp); 1928 if (optval) 1929 tp->t_flags |= TF_NOPUSH; 1930 else if (tp->t_flags & TF_NOPUSH) { 1931 tp->t_flags &= ~TF_NOPUSH; 1932 if (TCPS_HAVEESTABLISHED(tp->t_state)) { 1933 struct epoch_tracker et; 1934 1935 NET_EPOCH_ENTER(et); 1936 error = tp->t_fb->tfb_tcp_output(tp); 1937 NET_EPOCH_EXIT(et); 1938 } 1939 } 1940 goto unlock_and_done; 1941 1942 case TCP_MAXSEG: 1943 INP_WUNLOCK(inp); 1944 error = sooptcopyin(sopt, &optval, sizeof optval, 1945 sizeof optval); 1946 if (error) 1947 return (error); 1948 1949 INP_WLOCK_RECHECK(inp); 1950 if (optval > 0 && optval <= tp->t_maxseg && 1951 optval + 40 >= V_tcp_minmss) 1952 tp->t_maxseg = optval; 1953 else 1954 error = EINVAL; 1955 goto unlock_and_done; 1956 1957 case TCP_INFO: 1958 INP_WUNLOCK(inp); 1959 error = EINVAL; 1960 break; 1961 1962 case TCP_STATS: 1963 INP_WUNLOCK(inp); 1964 #ifdef STATS 1965 error = sooptcopyin(sopt, &optval, sizeof optval, 1966 sizeof optval); 1967 if (error) 1968 return (error); 1969 1970 if (optval > 0) 1971 sbp = stats_blob_alloc( 1972 V_tcp_perconn_stats_dflt_tpl, 0); 1973 else 1974 sbp = NULL; 1975 1976 INP_WLOCK_RECHECK(inp); 1977 if ((tp->t_stats != NULL && sbp == NULL) || 1978 (tp->t_stats == NULL && sbp != NULL)) { 1979 struct statsblob *t = tp->t_stats; 1980 tp->t_stats = sbp; 1981 sbp = t; 1982 } 1983 INP_WUNLOCK(inp); 1984 1985 stats_blob_destroy(sbp); 1986 #else 1987 return (EOPNOTSUPP); 1988 #endif /* !STATS */ 1989 break; 1990 1991 case TCP_CONGESTION: 1992 INP_WUNLOCK(inp); 1993 error = sooptcopyin(sopt, buf, TCP_CA_NAME_MAX - 1, 1); 1994 if (error) 1995 break; 1996 buf[sopt->sopt_valsize] = '\0'; 1997 INP_WLOCK_RECHECK(inp); 1998 CC_LIST_RLOCK(); 1999 STAILQ_FOREACH(algo, &cc_list, entries) 2000 if (strncmp(buf, algo->name, 2001 TCP_CA_NAME_MAX) == 0) 2002 break; 2003 CC_LIST_RUNLOCK(); 2004 if (algo == NULL) { 2005 INP_WUNLOCK(inp); 2006 error = EINVAL; 2007 break; 2008 } 2009 /* 2010 * We hold a write lock over the tcb so it's safe to 2011 * do these things without ordering concerns. 2012 */ 2013 if (CC_ALGO(tp)->cb_destroy != NULL) 2014 CC_ALGO(tp)->cb_destroy(tp->ccv); 2015 CC_DATA(tp) = NULL; 2016 CC_ALGO(tp) = algo; 2017 /* 2018 * If something goes pear shaped initialising the new 2019 * algo, fall back to newreno (which does not 2020 * require initialisation). 2021 */ 2022 if (algo->cb_init != NULL && 2023 algo->cb_init(tp->ccv) != 0) { 2024 CC_ALGO(tp) = &newreno_cc_algo; 2025 /* 2026 * The only reason init should fail is 2027 * because of malloc. 2028 */ 2029 error = ENOMEM; 2030 } 2031 INP_WUNLOCK(inp); 2032 break; 2033 2034 #ifdef KERN_TLS 2035 case TCP_TXTLS_ENABLE: 2036 INP_WUNLOCK(inp); 2037 error = sooptcopyin(sopt, &tls, sizeof(tls), 2038 sizeof(tls)); 2039 if (error) 2040 break; 2041 error = ktls_enable_tx(so, &tls); 2042 break; 2043 case TCP_TXTLS_MODE: 2044 INP_WUNLOCK(inp); 2045 error = sooptcopyin(sopt, &ui, sizeof(ui), sizeof(ui)); 2046 if (error) 2047 return (error); 2048 2049 INP_WLOCK_RECHECK(inp); 2050 error = ktls_set_tx_mode(so, ui); 2051 INP_WUNLOCK(inp); 2052 break; 2053 #endif 2054 2055 case TCP_KEEPIDLE: 2056 case TCP_KEEPINTVL: 2057 case TCP_KEEPINIT: 2058 INP_WUNLOCK(inp); 2059 error = sooptcopyin(sopt, &ui, sizeof(ui), sizeof(ui)); 2060 if (error) 2061 return (error); 2062 2063 if (ui > (UINT_MAX / hz)) { 2064 error = EINVAL; 2065 break; 2066 } 2067 ui *= hz; 2068 2069 INP_WLOCK_RECHECK(inp); 2070 switch (sopt->sopt_name) { 2071 case TCP_KEEPIDLE: 2072 tp->t_keepidle = ui; 2073 /* 2074 * XXX: better check current remaining 2075 * timeout and "merge" it with new value. 2076 */ 2077 if ((tp->t_state > TCPS_LISTEN) && 2078 (tp->t_state <= TCPS_CLOSING)) 2079 tcp_timer_activate(tp, TT_KEEP, 2080 TP_KEEPIDLE(tp)); 2081 break; 2082 case TCP_KEEPINTVL: 2083 tp->t_keepintvl = ui; 2084 if ((tp->t_state == TCPS_FIN_WAIT_2) && 2085 (TP_MAXIDLE(tp) > 0)) 2086 tcp_timer_activate(tp, TT_2MSL, 2087 TP_MAXIDLE(tp)); 2088 break; 2089 case TCP_KEEPINIT: 2090 tp->t_keepinit = ui; 2091 if (tp->t_state == TCPS_SYN_RECEIVED || 2092 tp->t_state == TCPS_SYN_SENT) 2093 tcp_timer_activate(tp, TT_KEEP, 2094 TP_KEEPINIT(tp)); 2095 break; 2096 } 2097 goto unlock_and_done; 2098 2099 case TCP_KEEPCNT: 2100 INP_WUNLOCK(inp); 2101 error = sooptcopyin(sopt, &ui, sizeof(ui), sizeof(ui)); 2102 if (error) 2103 return (error); 2104 2105 INP_WLOCK_RECHECK(inp); 2106 tp->t_keepcnt = ui; 2107 if ((tp->t_state == TCPS_FIN_WAIT_2) && 2108 (TP_MAXIDLE(tp) > 0)) 2109 tcp_timer_activate(tp, TT_2MSL, 2110 TP_MAXIDLE(tp)); 2111 goto unlock_and_done; 2112 2113 #ifdef TCPPCAP 2114 case TCP_PCAP_OUT: 2115 case TCP_PCAP_IN: 2116 INP_WUNLOCK(inp); 2117 error = sooptcopyin(sopt, &optval, sizeof optval, 2118 sizeof optval); 2119 if (error) 2120 return (error); 2121 2122 INP_WLOCK_RECHECK(inp); 2123 if (optval >= 0) 2124 tcp_pcap_set_sock_max(TCP_PCAP_OUT ? 2125 &(tp->t_outpkts) : &(tp->t_inpkts), 2126 optval); 2127 else 2128 error = EINVAL; 2129 goto unlock_and_done; 2130 #endif 2131 2132 case TCP_FASTOPEN: { 2133 struct tcp_fastopen tfo_optval; 2134 2135 INP_WUNLOCK(inp); 2136 if (!V_tcp_fastopen_client_enable && 2137 !V_tcp_fastopen_server_enable) 2138 return (EPERM); 2139 2140 error = sooptcopyin(sopt, &tfo_optval, 2141 sizeof(tfo_optval), sizeof(int)); 2142 if (error) 2143 return (error); 2144 2145 INP_WLOCK_RECHECK(inp); 2146 if (tfo_optval.enable) { 2147 if (tp->t_state == TCPS_LISTEN) { 2148 if (!V_tcp_fastopen_server_enable) { 2149 error = EPERM; 2150 goto unlock_and_done; 2151 } 2152 2153 tp->t_flags |= TF_FASTOPEN; 2154 if (tp->t_tfo_pending == NULL) 2155 tp->t_tfo_pending = 2156 tcp_fastopen_alloc_counter(); 2157 } else { 2158 /* 2159 * If a pre-shared key was provided, 2160 * stash it in the client cookie 2161 * field of the tcpcb for use during 2162 * connect. 2163 */ 2164 if (sopt->sopt_valsize == 2165 sizeof(tfo_optval)) { 2166 memcpy(tp->t_tfo_cookie.client, 2167 tfo_optval.psk, 2168 TCP_FASTOPEN_PSK_LEN); 2169 tp->t_tfo_client_cookie_len = 2170 TCP_FASTOPEN_PSK_LEN; 2171 } 2172 tp->t_flags |= TF_FASTOPEN; 2173 } 2174 } else 2175 tp->t_flags &= ~TF_FASTOPEN; 2176 goto unlock_and_done; 2177 } 2178 2179 #ifdef TCP_BLACKBOX 2180 case TCP_LOG: 2181 INP_WUNLOCK(inp); 2182 error = sooptcopyin(sopt, &optval, sizeof optval, 2183 sizeof optval); 2184 if (error) 2185 return (error); 2186 2187 INP_WLOCK_RECHECK(inp); 2188 error = tcp_log_state_change(tp, optval); 2189 goto unlock_and_done; 2190 2191 case TCP_LOGBUF: 2192 INP_WUNLOCK(inp); 2193 error = EINVAL; 2194 break; 2195 2196 case TCP_LOGID: 2197 INP_WUNLOCK(inp); 2198 error = sooptcopyin(sopt, buf, TCP_LOG_ID_LEN - 1, 0); 2199 if (error) 2200 break; 2201 buf[sopt->sopt_valsize] = '\0'; 2202 INP_WLOCK_RECHECK(inp); 2203 error = tcp_log_set_id(tp, buf); 2204 /* tcp_log_set_id() unlocks the INP. */ 2205 break; 2206 2207 case TCP_LOGDUMP: 2208 case TCP_LOGDUMPID: 2209 INP_WUNLOCK(inp); 2210 error = 2211 sooptcopyin(sopt, buf, TCP_LOG_REASON_LEN - 1, 0); 2212 if (error) 2213 break; 2214 buf[sopt->sopt_valsize] = '\0'; 2215 INP_WLOCK_RECHECK(inp); 2216 if (sopt->sopt_name == TCP_LOGDUMP) { 2217 error = tcp_log_dump_tp_logbuf(tp, buf, 2218 M_WAITOK, true); 2219 INP_WUNLOCK(inp); 2220 } else { 2221 tcp_log_dump_tp_bucket_logbufs(tp, buf); 2222 /* 2223 * tcp_log_dump_tp_bucket_logbufs() drops the 2224 * INP lock. 2225 */ 2226 } 2227 break; 2228 #endif 2229 2230 default: 2231 INP_WUNLOCK(inp); 2232 error = ENOPROTOOPT; 2233 break; 2234 } 2235 break; 2236 2237 case SOPT_GET: 2238 tp = intotcpcb(inp); 2239 switch (sopt->sopt_name) { 2240 #if defined(IPSEC_SUPPORT) || defined(TCP_SIGNATURE) 2241 case TCP_MD5SIG: 2242 if (!TCPMD5_ENABLED()) { 2243 INP_WUNLOCK(inp); 2244 return (ENOPROTOOPT); 2245 } 2246 error = TCPMD5_PCBCTL(inp, sopt); 2247 break; 2248 #endif 2249 2250 case TCP_NODELAY: 2251 optval = tp->t_flags & TF_NODELAY; 2252 INP_WUNLOCK(inp); 2253 error = sooptcopyout(sopt, &optval, sizeof optval); 2254 break; 2255 case TCP_MAXSEG: 2256 optval = tp->t_maxseg; 2257 INP_WUNLOCK(inp); 2258 error = sooptcopyout(sopt, &optval, sizeof optval); 2259 break; 2260 case TCP_NOOPT: 2261 optval = tp->t_flags & TF_NOOPT; 2262 INP_WUNLOCK(inp); 2263 error = sooptcopyout(sopt, &optval, sizeof optval); 2264 break; 2265 case TCP_NOPUSH: 2266 optval = tp->t_flags & TF_NOPUSH; 2267 INP_WUNLOCK(inp); 2268 error = sooptcopyout(sopt, &optval, sizeof optval); 2269 break; 2270 case TCP_INFO: 2271 tcp_fill_info(tp, &ti); 2272 INP_WUNLOCK(inp); 2273 error = sooptcopyout(sopt, &ti, sizeof ti); 2274 break; 2275 case TCP_STATS: 2276 { 2277 #ifdef STATS 2278 int nheld; 2279 TYPEOF_MEMBER(struct statsblob, flags) sbflags = 0; 2280 2281 error = 0; 2282 socklen_t outsbsz = sopt->sopt_valsize; 2283 if (tp->t_stats == NULL) 2284 error = ENOENT; 2285 else if (outsbsz >= tp->t_stats->cursz) 2286 outsbsz = tp->t_stats->cursz; 2287 else if (outsbsz >= sizeof(struct statsblob)) 2288 outsbsz = sizeof(struct statsblob); 2289 else 2290 error = EINVAL; 2291 INP_WUNLOCK(inp); 2292 if (error) 2293 break; 2294 2295 sbp = sopt->sopt_val; 2296 nheld = atop(round_page(((vm_offset_t)sbp) + 2297 (vm_size_t)outsbsz) - trunc_page((vm_offset_t)sbp)); 2298 vm_page_t ma[nheld]; 2299 if (vm_fault_quick_hold_pages( 2300 &curproc->p_vmspace->vm_map, (vm_offset_t)sbp, 2301 outsbsz, VM_PROT_READ | VM_PROT_WRITE, ma, 2302 nheld) < 0) { 2303 error = EFAULT; 2304 break; 2305 } 2306 2307 if ((error = copyin_nofault(&(sbp->flags), &sbflags, 2308 SIZEOF_MEMBER(struct statsblob, flags)))) 2309 goto unhold; 2310 2311 INP_WLOCK_RECHECK(inp); 2312 error = stats_blob_snapshot(&sbp, outsbsz, tp->t_stats, 2313 sbflags | SB_CLONE_USRDSTNOFAULT); 2314 INP_WUNLOCK(inp); 2315 sopt->sopt_valsize = outsbsz; 2316 unhold: 2317 vm_page_unhold_pages(ma, nheld); 2318 #else 2319 INP_WUNLOCK(inp); 2320 error = EOPNOTSUPP; 2321 #endif /* !STATS */ 2322 break; 2323 } 2324 case TCP_CONGESTION: 2325 len = strlcpy(buf, CC_ALGO(tp)->name, TCP_CA_NAME_MAX); 2326 INP_WUNLOCK(inp); 2327 error = sooptcopyout(sopt, buf, len + 1); 2328 break; 2329 case TCP_KEEPIDLE: 2330 case TCP_KEEPINTVL: 2331 case TCP_KEEPINIT: 2332 case TCP_KEEPCNT: 2333 switch (sopt->sopt_name) { 2334 case TCP_KEEPIDLE: 2335 ui = TP_KEEPIDLE(tp) / hz; 2336 break; 2337 case TCP_KEEPINTVL: 2338 ui = TP_KEEPINTVL(tp) / hz; 2339 break; 2340 case TCP_KEEPINIT: 2341 ui = TP_KEEPINIT(tp) / hz; 2342 break; 2343 case TCP_KEEPCNT: 2344 ui = TP_KEEPCNT(tp); 2345 break; 2346 } 2347 INP_WUNLOCK(inp); 2348 error = sooptcopyout(sopt, &ui, sizeof(ui)); 2349 break; 2350 #ifdef TCPPCAP 2351 case TCP_PCAP_OUT: 2352 case TCP_PCAP_IN: 2353 optval = tcp_pcap_get_sock_max(TCP_PCAP_OUT ? 2354 &(tp->t_outpkts) : &(tp->t_inpkts)); 2355 INP_WUNLOCK(inp); 2356 error = sooptcopyout(sopt, &optval, sizeof optval); 2357 break; 2358 #endif 2359 case TCP_FASTOPEN: 2360 optval = tp->t_flags & TF_FASTOPEN; 2361 INP_WUNLOCK(inp); 2362 error = sooptcopyout(sopt, &optval, sizeof optval); 2363 break; 2364 #ifdef TCP_BLACKBOX 2365 case TCP_LOG: 2366 optval = tp->t_logstate; 2367 INP_WUNLOCK(inp); 2368 error = sooptcopyout(sopt, &optval, sizeof(optval)); 2369 break; 2370 case TCP_LOGBUF: 2371 /* tcp_log_getlogbuf() does INP_WUNLOCK(inp) */ 2372 error = tcp_log_getlogbuf(sopt, tp); 2373 break; 2374 case TCP_LOGID: 2375 len = tcp_log_get_id(tp, buf); 2376 INP_WUNLOCK(inp); 2377 error = sooptcopyout(sopt, buf, len + 1); 2378 break; 2379 case TCP_LOGDUMP: 2380 case TCP_LOGDUMPID: 2381 INP_WUNLOCK(inp); 2382 error = EINVAL; 2383 break; 2384 #endif 2385 #ifdef KERN_TLS 2386 case TCP_TXTLS_MODE: 2387 optval = ktls_get_tx_mode(so); 2388 INP_WUNLOCK(inp); 2389 error = sooptcopyout(sopt, &optval, sizeof(optval)); 2390 break; 2391 #endif 2392 default: 2393 INP_WUNLOCK(inp); 2394 error = ENOPROTOOPT; 2395 break; 2396 } 2397 break; 2398 } 2399 return (error); 2400 } 2401 #undef INP_WLOCK_RECHECK 2402 #undef INP_WLOCK_RECHECK_CLEANUP 2403 2404 /* 2405 * Initiate (or continue) disconnect. 2406 * If embryonic state, just send reset (once). 2407 * If in ``let data drain'' option and linger null, just drop. 2408 * Otherwise (hard), mark socket disconnecting and drop 2409 * current input data; switch states based on user close, and 2410 * send segment to peer (with FIN). 2411 */ 2412 static void 2413 tcp_disconnect(struct tcpcb *tp) 2414 { 2415 struct inpcb *inp = tp->t_inpcb; 2416 struct socket *so = inp->inp_socket; 2417 2418 NET_EPOCH_ASSERT(); 2419 INP_WLOCK_ASSERT(inp); 2420 2421 /* 2422 * Neither tcp_close() nor tcp_drop() should return NULL, as the 2423 * socket is still open. 2424 */ 2425 if (tp->t_state < TCPS_ESTABLISHED && 2426 !(tp->t_state > TCPS_LISTEN && IS_FASTOPEN(tp->t_flags))) { 2427 tp = tcp_close(tp); 2428 KASSERT(tp != NULL, 2429 ("tcp_disconnect: tcp_close() returned NULL")); 2430 } else if ((so->so_options & SO_LINGER) && so->so_linger == 0) { 2431 tp = tcp_drop(tp, 0); 2432 KASSERT(tp != NULL, 2433 ("tcp_disconnect: tcp_drop() returned NULL")); 2434 } else { 2435 soisdisconnecting(so); 2436 sbflush(&so->so_rcv); 2437 tcp_usrclosed(tp); 2438 if (!(inp->inp_flags & INP_DROPPED)) 2439 tp->t_fb->tfb_tcp_output(tp); 2440 } 2441 } 2442 2443 /* 2444 * User issued close, and wish to trail through shutdown states: 2445 * if never received SYN, just forget it. If got a SYN from peer, 2446 * but haven't sent FIN, then go to FIN_WAIT_1 state to send peer a FIN. 2447 * If already got a FIN from peer, then almost done; go to LAST_ACK 2448 * state. In all other cases, have already sent FIN to peer (e.g. 2449 * after PRU_SHUTDOWN), and just have to play tedious game waiting 2450 * for peer to send FIN or not respond to keep-alives, etc. 2451 * We can let the user exit from the close as soon as the FIN is acked. 2452 */ 2453 static void 2454 tcp_usrclosed(struct tcpcb *tp) 2455 { 2456 2457 NET_EPOCH_ASSERT(); 2458 INP_WLOCK_ASSERT(tp->t_inpcb); 2459 2460 switch (tp->t_state) { 2461 case TCPS_LISTEN: 2462 #ifdef TCP_OFFLOAD 2463 tcp_offload_listen_stop(tp); 2464 #endif 2465 tcp_state_change(tp, TCPS_CLOSED); 2466 /* FALLTHROUGH */ 2467 case TCPS_CLOSED: 2468 tp = tcp_close(tp); 2469 /* 2470 * tcp_close() should never return NULL here as the socket is 2471 * still open. 2472 */ 2473 KASSERT(tp != NULL, 2474 ("tcp_usrclosed: tcp_close() returned NULL")); 2475 break; 2476 2477 case TCPS_SYN_SENT: 2478 case TCPS_SYN_RECEIVED: 2479 tp->t_flags |= TF_NEEDFIN; 2480 break; 2481 2482 case TCPS_ESTABLISHED: 2483 tcp_state_change(tp, TCPS_FIN_WAIT_1); 2484 break; 2485 2486 case TCPS_CLOSE_WAIT: 2487 tcp_state_change(tp, TCPS_LAST_ACK); 2488 break; 2489 } 2490 if (tp->t_state >= TCPS_FIN_WAIT_2) { 2491 soisdisconnected(tp->t_inpcb->inp_socket); 2492 /* Prevent the connection hanging in FIN_WAIT_2 forever. */ 2493 if (tp->t_state == TCPS_FIN_WAIT_2) { 2494 int timeout; 2495 2496 timeout = (tcp_fast_finwait2_recycle) ? 2497 tcp_finwait2_timeout : TP_MAXIDLE(tp); 2498 tcp_timer_activate(tp, TT_2MSL, timeout); 2499 } 2500 } 2501 } 2502 2503 #ifdef DDB 2504 static void 2505 db_print_indent(int indent) 2506 { 2507 int i; 2508 2509 for (i = 0; i < indent; i++) 2510 db_printf(" "); 2511 } 2512 2513 static void 2514 db_print_tstate(int t_state) 2515 { 2516 2517 switch (t_state) { 2518 case TCPS_CLOSED: 2519 db_printf("TCPS_CLOSED"); 2520 return; 2521 2522 case TCPS_LISTEN: 2523 db_printf("TCPS_LISTEN"); 2524 return; 2525 2526 case TCPS_SYN_SENT: 2527 db_printf("TCPS_SYN_SENT"); 2528 return; 2529 2530 case TCPS_SYN_RECEIVED: 2531 db_printf("TCPS_SYN_RECEIVED"); 2532 return; 2533 2534 case TCPS_ESTABLISHED: 2535 db_printf("TCPS_ESTABLISHED"); 2536 return; 2537 2538 case TCPS_CLOSE_WAIT: 2539 db_printf("TCPS_CLOSE_WAIT"); 2540 return; 2541 2542 case TCPS_FIN_WAIT_1: 2543 db_printf("TCPS_FIN_WAIT_1"); 2544 return; 2545 2546 case TCPS_CLOSING: 2547 db_printf("TCPS_CLOSING"); 2548 return; 2549 2550 case TCPS_LAST_ACK: 2551 db_printf("TCPS_LAST_ACK"); 2552 return; 2553 2554 case TCPS_FIN_WAIT_2: 2555 db_printf("TCPS_FIN_WAIT_2"); 2556 return; 2557 2558 case TCPS_TIME_WAIT: 2559 db_printf("TCPS_TIME_WAIT"); 2560 return; 2561 2562 default: 2563 db_printf("unknown"); 2564 return; 2565 } 2566 } 2567 2568 static void 2569 db_print_tflags(u_int t_flags) 2570 { 2571 int comma; 2572 2573 comma = 0; 2574 if (t_flags & TF_ACKNOW) { 2575 db_printf("%sTF_ACKNOW", comma ? ", " : ""); 2576 comma = 1; 2577 } 2578 if (t_flags & TF_DELACK) { 2579 db_printf("%sTF_DELACK", comma ? ", " : ""); 2580 comma = 1; 2581 } 2582 if (t_flags & TF_NODELAY) { 2583 db_printf("%sTF_NODELAY", comma ? ", " : ""); 2584 comma = 1; 2585 } 2586 if (t_flags & TF_NOOPT) { 2587 db_printf("%sTF_NOOPT", comma ? ", " : ""); 2588 comma = 1; 2589 } 2590 if (t_flags & TF_SENTFIN) { 2591 db_printf("%sTF_SENTFIN", comma ? ", " : ""); 2592 comma = 1; 2593 } 2594 if (t_flags & TF_REQ_SCALE) { 2595 db_printf("%sTF_REQ_SCALE", comma ? ", " : ""); 2596 comma = 1; 2597 } 2598 if (t_flags & TF_RCVD_SCALE) { 2599 db_printf("%sTF_RECVD_SCALE", comma ? ", " : ""); 2600 comma = 1; 2601 } 2602 if (t_flags & TF_REQ_TSTMP) { 2603 db_printf("%sTF_REQ_TSTMP", comma ? ", " : ""); 2604 comma = 1; 2605 } 2606 if (t_flags & TF_RCVD_TSTMP) { 2607 db_printf("%sTF_RCVD_TSTMP", comma ? ", " : ""); 2608 comma = 1; 2609 } 2610 if (t_flags & TF_SACK_PERMIT) { 2611 db_printf("%sTF_SACK_PERMIT", comma ? ", " : ""); 2612 comma = 1; 2613 } 2614 if (t_flags & TF_NEEDSYN) { 2615 db_printf("%sTF_NEEDSYN", comma ? ", " : ""); 2616 comma = 1; 2617 } 2618 if (t_flags & TF_NEEDFIN) { 2619 db_printf("%sTF_NEEDFIN", comma ? ", " : ""); 2620 comma = 1; 2621 } 2622 if (t_flags & TF_NOPUSH) { 2623 db_printf("%sTF_NOPUSH", comma ? ", " : ""); 2624 comma = 1; 2625 } 2626 if (t_flags & TF_MORETOCOME) { 2627 db_printf("%sTF_MORETOCOME", comma ? ", " : ""); 2628 comma = 1; 2629 } 2630 if (t_flags & TF_LQ_OVERFLOW) { 2631 db_printf("%sTF_LQ_OVERFLOW", comma ? ", " : ""); 2632 comma = 1; 2633 } 2634 if (t_flags & TF_LASTIDLE) { 2635 db_printf("%sTF_LASTIDLE", comma ? ", " : ""); 2636 comma = 1; 2637 } 2638 if (t_flags & TF_RXWIN0SENT) { 2639 db_printf("%sTF_RXWIN0SENT", comma ? ", " : ""); 2640 comma = 1; 2641 } 2642 if (t_flags & TF_FASTRECOVERY) { 2643 db_printf("%sTF_FASTRECOVERY", comma ? ", " : ""); 2644 comma = 1; 2645 } 2646 if (t_flags & TF_CONGRECOVERY) { 2647 db_printf("%sTF_CONGRECOVERY", comma ? ", " : ""); 2648 comma = 1; 2649 } 2650 if (t_flags & TF_WASFRECOVERY) { 2651 db_printf("%sTF_WASFRECOVERY", comma ? ", " : ""); 2652 comma = 1; 2653 } 2654 if (t_flags & TF_SIGNATURE) { 2655 db_printf("%sTF_SIGNATURE", comma ? ", " : ""); 2656 comma = 1; 2657 } 2658 if (t_flags & TF_FORCEDATA) { 2659 db_printf("%sTF_FORCEDATA", comma ? ", " : ""); 2660 comma = 1; 2661 } 2662 if (t_flags & TF_TSO) { 2663 db_printf("%sTF_TSO", comma ? ", " : ""); 2664 comma = 1; 2665 } 2666 if (t_flags & TF_FASTOPEN) { 2667 db_printf("%sTF_FASTOPEN", comma ? ", " : ""); 2668 comma = 1; 2669 } 2670 } 2671 2672 static void 2673 db_print_tflags2(u_int t_flags2) 2674 { 2675 int comma; 2676 2677 comma = 0; 2678 if (t_flags2 & TF2_ECN_PERMIT) { 2679 db_printf("%sTF2_ECN_PERMIT", comma ? ", " : ""); 2680 comma = 1; 2681 } 2682 } 2683 2684 2685 static void 2686 db_print_toobflags(char t_oobflags) 2687 { 2688 int comma; 2689 2690 comma = 0; 2691 if (t_oobflags & TCPOOB_HAVEDATA) { 2692 db_printf("%sTCPOOB_HAVEDATA", comma ? ", " : ""); 2693 comma = 1; 2694 } 2695 if (t_oobflags & TCPOOB_HADDATA) { 2696 db_printf("%sTCPOOB_HADDATA", comma ? ", " : ""); 2697 comma = 1; 2698 } 2699 } 2700 2701 static void 2702 db_print_tcpcb(struct tcpcb *tp, const char *name, int indent) 2703 { 2704 2705 db_print_indent(indent); 2706 db_printf("%s at %p\n", name, tp); 2707 2708 indent += 2; 2709 2710 db_print_indent(indent); 2711 db_printf("t_segq first: %p t_segqlen: %d t_dupacks: %d\n", 2712 TAILQ_FIRST(&tp->t_segq), tp->t_segqlen, tp->t_dupacks); 2713 2714 db_print_indent(indent); 2715 db_printf("tt_rexmt: %p tt_persist: %p tt_keep: %p\n", 2716 &tp->t_timers->tt_rexmt, &tp->t_timers->tt_persist, &tp->t_timers->tt_keep); 2717 2718 db_print_indent(indent); 2719 db_printf("tt_2msl: %p tt_delack: %p t_inpcb: %p\n", &tp->t_timers->tt_2msl, 2720 &tp->t_timers->tt_delack, tp->t_inpcb); 2721 2722 db_print_indent(indent); 2723 db_printf("t_state: %d (", tp->t_state); 2724 db_print_tstate(tp->t_state); 2725 db_printf(")\n"); 2726 2727 db_print_indent(indent); 2728 db_printf("t_flags: 0x%x (", tp->t_flags); 2729 db_print_tflags(tp->t_flags); 2730 db_printf(")\n"); 2731 2732 db_print_indent(indent); 2733 db_printf("t_flags2: 0x%x (", tp->t_flags2); 2734 db_print_tflags2(tp->t_flags2); 2735 db_printf(")\n"); 2736 2737 db_print_indent(indent); 2738 db_printf("snd_una: 0x%08x snd_max: 0x%08x snd_nxt: x0%08x\n", 2739 tp->snd_una, tp->snd_max, tp->snd_nxt); 2740 2741 db_print_indent(indent); 2742 db_printf("snd_up: 0x%08x snd_wl1: 0x%08x snd_wl2: 0x%08x\n", 2743 tp->snd_up, tp->snd_wl1, tp->snd_wl2); 2744 2745 db_print_indent(indent); 2746 db_printf("iss: 0x%08x irs: 0x%08x rcv_nxt: 0x%08x\n", 2747 tp->iss, tp->irs, tp->rcv_nxt); 2748 2749 db_print_indent(indent); 2750 db_printf("rcv_adv: 0x%08x rcv_wnd: %u rcv_up: 0x%08x\n", 2751 tp->rcv_adv, tp->rcv_wnd, tp->rcv_up); 2752 2753 db_print_indent(indent); 2754 db_printf("snd_wnd: %u snd_cwnd: %u\n", 2755 tp->snd_wnd, tp->snd_cwnd); 2756 2757 db_print_indent(indent); 2758 db_printf("snd_ssthresh: %u snd_recover: " 2759 "0x%08x\n", tp->snd_ssthresh, tp->snd_recover); 2760 2761 db_print_indent(indent); 2762 db_printf("t_rcvtime: %u t_startime: %u\n", 2763 tp->t_rcvtime, tp->t_starttime); 2764 2765 db_print_indent(indent); 2766 db_printf("t_rttime: %u t_rtsq: 0x%08x\n", 2767 tp->t_rtttime, tp->t_rtseq); 2768 2769 db_print_indent(indent); 2770 db_printf("t_rxtcur: %d t_maxseg: %u t_srtt: %d\n", 2771 tp->t_rxtcur, tp->t_maxseg, tp->t_srtt); 2772 2773 db_print_indent(indent); 2774 db_printf("t_rttvar: %d t_rxtshift: %d t_rttmin: %u " 2775 "t_rttbest: %u\n", tp->t_rttvar, tp->t_rxtshift, tp->t_rttmin, 2776 tp->t_rttbest); 2777 2778 db_print_indent(indent); 2779 db_printf("t_rttupdated: %lu max_sndwnd: %u t_softerror: %d\n", 2780 tp->t_rttupdated, tp->max_sndwnd, tp->t_softerror); 2781 2782 db_print_indent(indent); 2783 db_printf("t_oobflags: 0x%x (", tp->t_oobflags); 2784 db_print_toobflags(tp->t_oobflags); 2785 db_printf(") t_iobc: 0x%02x\n", tp->t_iobc); 2786 2787 db_print_indent(indent); 2788 db_printf("snd_scale: %u rcv_scale: %u request_r_scale: %u\n", 2789 tp->snd_scale, tp->rcv_scale, tp->request_r_scale); 2790 2791 db_print_indent(indent); 2792 db_printf("ts_recent: %u ts_recent_age: %u\n", 2793 tp->ts_recent, tp->ts_recent_age); 2794 2795 db_print_indent(indent); 2796 db_printf("ts_offset: %u last_ack_sent: 0x%08x snd_cwnd_prev: " 2797 "%u\n", tp->ts_offset, tp->last_ack_sent, tp->snd_cwnd_prev); 2798 2799 db_print_indent(indent); 2800 db_printf("snd_ssthresh_prev: %u snd_recover_prev: 0x%08x " 2801 "t_badrxtwin: %u\n", tp->snd_ssthresh_prev, 2802 tp->snd_recover_prev, tp->t_badrxtwin); 2803 2804 db_print_indent(indent); 2805 db_printf("snd_numholes: %d snd_holes first: %p\n", 2806 tp->snd_numholes, TAILQ_FIRST(&tp->snd_holes)); 2807 2808 db_print_indent(indent); 2809 db_printf("snd_fack: 0x%08x rcv_numsacks: %d\n", 2810 tp->snd_fack, tp->rcv_numsacks); 2811 2812 /* Skip sackblks, sackhint. */ 2813 2814 db_print_indent(indent); 2815 db_printf("t_rttlow: %d rfbuf_ts: %u rfbuf_cnt: %d\n", 2816 tp->t_rttlow, tp->rfbuf_ts, tp->rfbuf_cnt); 2817 } 2818 2819 DB_SHOW_COMMAND(tcpcb, db_show_tcpcb) 2820 { 2821 struct tcpcb *tp; 2822 2823 if (!have_addr) { 2824 db_printf("usage: show tcpcb <addr>\n"); 2825 return; 2826 } 2827 tp = (struct tcpcb *)addr; 2828 2829 db_print_tcpcb(tp, "tcpcb", 0); 2830 } 2831 #endif 2832