1 /*- 2 * Copyright (c) 1982, 1986, 1988, 1993 3 * The Regents of the University of California. 4 * Copyright (c) 2006-2007 Robert N. M. Watson 5 * Copyright (c) 2010-2011 Juniper Networks, Inc. 6 * All rights reserved. 7 * 8 * Portions of this software were developed by Robert N. M. Watson under 9 * contract to Juniper Networks, Inc. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 4. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * From: @(#)tcp_usrreq.c 8.2 (Berkeley) 1/3/94 36 */ 37 38 #include <sys/cdefs.h> 39 __FBSDID("$FreeBSD$"); 40 41 #include "opt_ddb.h" 42 #include "opt_inet.h" 43 #include "opt_inet6.h" 44 #include "opt_tcpdebug.h" 45 46 #include <sys/param.h> 47 #include <sys/systm.h> 48 #include <sys/limits.h> 49 #include <sys/malloc.h> 50 #include <sys/kernel.h> 51 #include <sys/sysctl.h> 52 #include <sys/mbuf.h> 53 #ifdef INET6 54 #include <sys/domain.h> 55 #endif /* INET6 */ 56 #include <sys/socket.h> 57 #include <sys/socketvar.h> 58 #include <sys/protosw.h> 59 #include <sys/proc.h> 60 #include <sys/jail.h> 61 62 #ifdef DDB 63 #include <ddb/ddb.h> 64 #endif 65 66 #include <net/if.h> 67 #include <net/if_var.h> 68 #include <net/route.h> 69 #include <net/vnet.h> 70 71 #include <netinet/cc.h> 72 #include <netinet/in.h> 73 #include <netinet/in_pcb.h> 74 #include <netinet/in_systm.h> 75 #include <netinet/in_var.h> 76 #include <netinet/ip_var.h> 77 #ifdef INET6 78 #include <netinet/ip6.h> 79 #include <netinet6/in6_pcb.h> 80 #include <netinet6/ip6_var.h> 81 #include <netinet6/scope6_var.h> 82 #endif 83 #include <netinet/tcp_fsm.h> 84 #include <netinet/tcp_seq.h> 85 #include <netinet/tcp_timer.h> 86 #include <netinet/tcp_var.h> 87 #include <netinet/tcpip.h> 88 #ifdef TCPDEBUG 89 #include <netinet/tcp_debug.h> 90 #endif 91 #ifdef TCP_OFFLOAD 92 #include <netinet/tcp_offload.h> 93 #endif 94 95 /* 96 * TCP protocol interface to socket abstraction. 97 */ 98 static int tcp_attach(struct socket *); 99 #ifdef INET 100 static int tcp_connect(struct tcpcb *, struct sockaddr *, 101 struct thread *td); 102 #endif /* INET */ 103 #ifdef INET6 104 static int tcp6_connect(struct tcpcb *, struct sockaddr *, 105 struct thread *td); 106 #endif /* INET6 */ 107 static void tcp_disconnect(struct tcpcb *); 108 static void tcp_usrclosed(struct tcpcb *); 109 static void tcp_fill_info(struct tcpcb *, struct tcp_info *); 110 111 #ifdef TCPDEBUG 112 #define TCPDEBUG0 int ostate = 0 113 #define TCPDEBUG1() ostate = tp ? tp->t_state : 0 114 #define TCPDEBUG2(req) if (tp && (so->so_options & SO_DEBUG)) \ 115 tcp_trace(TA_USER, ostate, tp, 0, 0, req) 116 #else 117 #define TCPDEBUG0 118 #define TCPDEBUG1() 119 #define TCPDEBUG2(req) 120 #endif 121 122 /* 123 * TCP attaches to socket via pru_attach(), reserving space, 124 * and an internet control block. 125 */ 126 static int 127 tcp_usr_attach(struct socket *so, int proto, struct thread *td) 128 { 129 struct inpcb *inp; 130 struct tcpcb *tp = NULL; 131 int error; 132 TCPDEBUG0; 133 134 inp = sotoinpcb(so); 135 KASSERT(inp == NULL, ("tcp_usr_attach: inp != NULL")); 136 TCPDEBUG1(); 137 138 error = tcp_attach(so); 139 if (error) 140 goto out; 141 142 if ((so->so_options & SO_LINGER) && so->so_linger == 0) 143 so->so_linger = TCP_LINGERTIME; 144 145 inp = sotoinpcb(so); 146 tp = intotcpcb(inp); 147 out: 148 TCPDEBUG2(PRU_ATTACH); 149 return error; 150 } 151 152 /* 153 * tcp_detach is called when the socket layer loses its final reference 154 * to the socket, be it a file descriptor reference, a reference from TCP, 155 * etc. At this point, there is only one case in which we will keep around 156 * inpcb state: time wait. 157 * 158 * This function can probably be re-absorbed back into tcp_usr_detach() now 159 * that there is a single detach path. 160 */ 161 static void 162 tcp_detach(struct socket *so, struct inpcb *inp) 163 { 164 struct tcpcb *tp; 165 166 INP_INFO_WLOCK_ASSERT(&V_tcbinfo); 167 INP_WLOCK_ASSERT(inp); 168 169 KASSERT(so->so_pcb == inp, ("tcp_detach: so_pcb != inp")); 170 KASSERT(inp->inp_socket == so, ("tcp_detach: inp_socket != so")); 171 172 tp = intotcpcb(inp); 173 174 if (inp->inp_flags & INP_TIMEWAIT) { 175 /* 176 * There are two cases to handle: one in which the time wait 177 * state is being discarded (INP_DROPPED), and one in which 178 * this connection will remain in timewait. In the former, 179 * it is time to discard all state (except tcptw, which has 180 * already been discarded by the timewait close code, which 181 * should be further up the call stack somewhere). In the 182 * latter case, we detach from the socket, but leave the pcb 183 * present until timewait ends. 184 * 185 * XXXRW: Would it be cleaner to free the tcptw here? 186 * 187 * Astute question indeed, from twtcp perspective there are 188 * three cases to consider: 189 * 190 * #1 tcp_detach is called at tcptw creation time by 191 * tcp_twstart, then do not discard the newly created tcptw 192 * and leave inpcb present until timewait ends 193 * #2 tcp_detach is called at timewait end (or reuse) by 194 * tcp_twclose, then the tcptw has already been discarded 195 * and inpcb is freed here 196 * #3 tcp_detach is called() after timewait ends (or reuse) 197 * (e.g. by soclose), then tcptw has already been discarded 198 * and inpcb is freed here 199 * 200 * In all three cases the tcptw should not be freed here. 201 */ 202 if (inp->inp_flags & INP_DROPPED) { 203 KASSERT(tp == NULL, ("tcp_detach: INP_TIMEWAIT && " 204 "INP_DROPPED && tp != NULL")); 205 in_pcbdetach(inp); 206 in_pcbfree(inp); 207 } else { 208 in_pcbdetach(inp); 209 INP_WUNLOCK(inp); 210 } 211 } else { 212 /* 213 * If the connection is not in timewait, we consider two 214 * two conditions: one in which no further processing is 215 * necessary (dropped || embryonic), and one in which TCP is 216 * not yet done, but no longer requires the socket, so the 217 * pcb will persist for the time being. 218 * 219 * XXXRW: Does the second case still occur? 220 */ 221 if (inp->inp_flags & INP_DROPPED || 222 tp->t_state < TCPS_SYN_SENT) { 223 tcp_discardcb(tp); 224 in_pcbdetach(inp); 225 in_pcbfree(inp); 226 } else { 227 in_pcbdetach(inp); 228 INP_WUNLOCK(inp); 229 } 230 } 231 } 232 233 /* 234 * pru_detach() detaches the TCP protocol from the socket. 235 * If the protocol state is non-embryonic, then can't 236 * do this directly: have to initiate a pru_disconnect(), 237 * which may finish later; embryonic TCB's can just 238 * be discarded here. 239 */ 240 static void 241 tcp_usr_detach(struct socket *so) 242 { 243 struct inpcb *inp; 244 245 inp = sotoinpcb(so); 246 KASSERT(inp != NULL, ("tcp_usr_detach: inp == NULL")); 247 INP_INFO_WLOCK(&V_tcbinfo); 248 INP_WLOCK(inp); 249 KASSERT(inp->inp_socket != NULL, 250 ("tcp_usr_detach: inp_socket == NULL")); 251 tcp_detach(so, inp); 252 INP_INFO_WUNLOCK(&V_tcbinfo); 253 } 254 255 #ifdef INET 256 /* 257 * Give the socket an address. 258 */ 259 static int 260 tcp_usr_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 261 { 262 int error = 0; 263 struct inpcb *inp; 264 struct tcpcb *tp = NULL; 265 struct sockaddr_in *sinp; 266 267 sinp = (struct sockaddr_in *)nam; 268 if (nam->sa_len != sizeof (*sinp)) 269 return (EINVAL); 270 /* 271 * Must check for multicast addresses and disallow binding 272 * to them. 273 */ 274 if (sinp->sin_family == AF_INET && 275 IN_MULTICAST(ntohl(sinp->sin_addr.s_addr))) 276 return (EAFNOSUPPORT); 277 278 TCPDEBUG0; 279 inp = sotoinpcb(so); 280 KASSERT(inp != NULL, ("tcp_usr_bind: inp == NULL")); 281 INP_WLOCK(inp); 282 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 283 error = EINVAL; 284 goto out; 285 } 286 tp = intotcpcb(inp); 287 TCPDEBUG1(); 288 INP_HASH_WLOCK(&V_tcbinfo); 289 error = in_pcbbind(inp, nam, td->td_ucred); 290 INP_HASH_WUNLOCK(&V_tcbinfo); 291 out: 292 TCPDEBUG2(PRU_BIND); 293 INP_WUNLOCK(inp); 294 295 return (error); 296 } 297 #endif /* INET */ 298 299 #ifdef INET6 300 static int 301 tcp6_usr_bind(struct socket *so, struct sockaddr *nam, struct thread *td) 302 { 303 int error = 0; 304 struct inpcb *inp; 305 struct tcpcb *tp = NULL; 306 struct sockaddr_in6 *sin6p; 307 308 sin6p = (struct sockaddr_in6 *)nam; 309 if (nam->sa_len != sizeof (*sin6p)) 310 return (EINVAL); 311 /* 312 * Must check for multicast addresses and disallow binding 313 * to them. 314 */ 315 if (sin6p->sin6_family == AF_INET6 && 316 IN6_IS_ADDR_MULTICAST(&sin6p->sin6_addr)) 317 return (EAFNOSUPPORT); 318 319 TCPDEBUG0; 320 inp = sotoinpcb(so); 321 KASSERT(inp != NULL, ("tcp6_usr_bind: inp == NULL")); 322 INP_WLOCK(inp); 323 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 324 error = EINVAL; 325 goto out; 326 } 327 tp = intotcpcb(inp); 328 TCPDEBUG1(); 329 INP_HASH_WLOCK(&V_tcbinfo); 330 inp->inp_vflag &= ~INP_IPV4; 331 inp->inp_vflag |= INP_IPV6; 332 #ifdef INET 333 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) { 334 if (IN6_IS_ADDR_UNSPECIFIED(&sin6p->sin6_addr)) 335 inp->inp_vflag |= INP_IPV4; 336 else if (IN6_IS_ADDR_V4MAPPED(&sin6p->sin6_addr)) { 337 struct sockaddr_in sin; 338 339 in6_sin6_2_sin(&sin, sin6p); 340 inp->inp_vflag |= INP_IPV4; 341 inp->inp_vflag &= ~INP_IPV6; 342 error = in_pcbbind(inp, (struct sockaddr *)&sin, 343 td->td_ucred); 344 INP_HASH_WUNLOCK(&V_tcbinfo); 345 goto out; 346 } 347 } 348 #endif 349 error = in6_pcbbind(inp, nam, td->td_ucred); 350 INP_HASH_WUNLOCK(&V_tcbinfo); 351 out: 352 TCPDEBUG2(PRU_BIND); 353 INP_WUNLOCK(inp); 354 return (error); 355 } 356 #endif /* INET6 */ 357 358 #ifdef INET 359 /* 360 * Prepare to accept connections. 361 */ 362 static int 363 tcp_usr_listen(struct socket *so, int backlog, struct thread *td) 364 { 365 int error = 0; 366 struct inpcb *inp; 367 struct tcpcb *tp = NULL; 368 369 TCPDEBUG0; 370 inp = sotoinpcb(so); 371 KASSERT(inp != NULL, ("tcp_usr_listen: inp == NULL")); 372 INP_WLOCK(inp); 373 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 374 error = EINVAL; 375 goto out; 376 } 377 tp = intotcpcb(inp); 378 TCPDEBUG1(); 379 SOCK_LOCK(so); 380 error = solisten_proto_check(so); 381 INP_HASH_WLOCK(&V_tcbinfo); 382 if (error == 0 && inp->inp_lport == 0) 383 error = in_pcbbind(inp, (struct sockaddr *)0, td->td_ucred); 384 INP_HASH_WUNLOCK(&V_tcbinfo); 385 if (error == 0) { 386 tcp_state_change(tp, TCPS_LISTEN); 387 solisten_proto(so, backlog); 388 #ifdef TCP_OFFLOAD 389 if ((so->so_options & SO_NO_OFFLOAD) == 0) 390 tcp_offload_listen_start(tp); 391 #endif 392 } 393 SOCK_UNLOCK(so); 394 395 out: 396 TCPDEBUG2(PRU_LISTEN); 397 INP_WUNLOCK(inp); 398 return (error); 399 } 400 #endif /* INET */ 401 402 #ifdef INET6 403 static int 404 tcp6_usr_listen(struct socket *so, int backlog, struct thread *td) 405 { 406 int error = 0; 407 struct inpcb *inp; 408 struct tcpcb *tp = NULL; 409 410 TCPDEBUG0; 411 inp = sotoinpcb(so); 412 KASSERT(inp != NULL, ("tcp6_usr_listen: inp == NULL")); 413 INP_WLOCK(inp); 414 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 415 error = EINVAL; 416 goto out; 417 } 418 tp = intotcpcb(inp); 419 TCPDEBUG1(); 420 SOCK_LOCK(so); 421 error = solisten_proto_check(so); 422 INP_HASH_WLOCK(&V_tcbinfo); 423 if (error == 0 && inp->inp_lport == 0) { 424 inp->inp_vflag &= ~INP_IPV4; 425 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) == 0) 426 inp->inp_vflag |= INP_IPV4; 427 error = in6_pcbbind(inp, (struct sockaddr *)0, td->td_ucred); 428 } 429 INP_HASH_WUNLOCK(&V_tcbinfo); 430 if (error == 0) { 431 tcp_state_change(tp, TCPS_LISTEN); 432 solisten_proto(so, backlog); 433 #ifdef TCP_OFFLOAD 434 if ((so->so_options & SO_NO_OFFLOAD) == 0) 435 tcp_offload_listen_start(tp); 436 #endif 437 } 438 SOCK_UNLOCK(so); 439 440 out: 441 TCPDEBUG2(PRU_LISTEN); 442 INP_WUNLOCK(inp); 443 return (error); 444 } 445 #endif /* INET6 */ 446 447 #ifdef INET 448 /* 449 * Initiate connection to peer. 450 * Create a template for use in transmissions on this connection. 451 * Enter SYN_SENT state, and mark socket as connecting. 452 * Start keep-alive timer, and seed output sequence space. 453 * Send initial segment on connection. 454 */ 455 static int 456 tcp_usr_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 457 { 458 int error = 0; 459 struct inpcb *inp; 460 struct tcpcb *tp = NULL; 461 struct sockaddr_in *sinp; 462 463 sinp = (struct sockaddr_in *)nam; 464 if (nam->sa_len != sizeof (*sinp)) 465 return (EINVAL); 466 /* 467 * Must disallow TCP ``connections'' to multicast addresses. 468 */ 469 if (sinp->sin_family == AF_INET 470 && IN_MULTICAST(ntohl(sinp->sin_addr.s_addr))) 471 return (EAFNOSUPPORT); 472 if ((error = prison_remote_ip4(td->td_ucred, &sinp->sin_addr)) != 0) 473 return (error); 474 475 TCPDEBUG0; 476 inp = sotoinpcb(so); 477 KASSERT(inp != NULL, ("tcp_usr_connect: inp == NULL")); 478 INP_WLOCK(inp); 479 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 480 error = EINVAL; 481 goto out; 482 } 483 tp = intotcpcb(inp); 484 TCPDEBUG1(); 485 if ((error = tcp_connect(tp, nam, td)) != 0) 486 goto out; 487 #ifdef TCP_OFFLOAD 488 if (registered_toedevs > 0 && 489 (so->so_options & SO_NO_OFFLOAD) == 0 && 490 (error = tcp_offload_connect(so, nam)) == 0) 491 goto out; 492 #endif 493 tcp_timer_activate(tp, TT_KEEP, TP_KEEPINIT(tp)); 494 error = tcp_output(tp); 495 out: 496 TCPDEBUG2(PRU_CONNECT); 497 INP_WUNLOCK(inp); 498 return (error); 499 } 500 #endif /* INET */ 501 502 #ifdef INET6 503 static int 504 tcp6_usr_connect(struct socket *so, struct sockaddr *nam, struct thread *td) 505 { 506 int error = 0; 507 struct inpcb *inp; 508 struct tcpcb *tp = NULL; 509 struct sockaddr_in6 *sin6p; 510 511 TCPDEBUG0; 512 513 sin6p = (struct sockaddr_in6 *)nam; 514 if (nam->sa_len != sizeof (*sin6p)) 515 return (EINVAL); 516 /* 517 * Must disallow TCP ``connections'' to multicast addresses. 518 */ 519 if (sin6p->sin6_family == AF_INET6 520 && IN6_IS_ADDR_MULTICAST(&sin6p->sin6_addr)) 521 return (EAFNOSUPPORT); 522 523 inp = sotoinpcb(so); 524 KASSERT(inp != NULL, ("tcp6_usr_connect: inp == NULL")); 525 INP_WLOCK(inp); 526 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 527 error = EINVAL; 528 goto out; 529 } 530 tp = intotcpcb(inp); 531 TCPDEBUG1(); 532 #ifdef INET 533 /* 534 * XXXRW: Some confusion: V4/V6 flags relate to binding, and 535 * therefore probably require the hash lock, which isn't held here. 536 * Is this a significant problem? 537 */ 538 if (IN6_IS_ADDR_V4MAPPED(&sin6p->sin6_addr)) { 539 struct sockaddr_in sin; 540 541 if ((inp->inp_flags & IN6P_IPV6_V6ONLY) != 0) { 542 error = EINVAL; 543 goto out; 544 } 545 546 in6_sin6_2_sin(&sin, sin6p); 547 inp->inp_vflag |= INP_IPV4; 548 inp->inp_vflag &= ~INP_IPV6; 549 if ((error = prison_remote_ip4(td->td_ucred, 550 &sin.sin_addr)) != 0) 551 goto out; 552 if ((error = tcp_connect(tp, (struct sockaddr *)&sin, td)) != 0) 553 goto out; 554 #ifdef TCP_OFFLOAD 555 if (registered_toedevs > 0 && 556 (so->so_options & SO_NO_OFFLOAD) == 0 && 557 (error = tcp_offload_connect(so, nam)) == 0) 558 goto out; 559 #endif 560 error = tcp_output(tp); 561 goto out; 562 } 563 #endif 564 inp->inp_vflag &= ~INP_IPV4; 565 inp->inp_vflag |= INP_IPV6; 566 inp->inp_inc.inc_flags |= INC_ISIPV6; 567 if ((error = prison_remote_ip6(td->td_ucred, &sin6p->sin6_addr)) != 0) 568 goto out; 569 if ((error = tcp6_connect(tp, nam, td)) != 0) 570 goto out; 571 #ifdef TCP_OFFLOAD 572 if (registered_toedevs > 0 && 573 (so->so_options & SO_NO_OFFLOAD) == 0 && 574 (error = tcp_offload_connect(so, nam)) == 0) 575 goto out; 576 #endif 577 tcp_timer_activate(tp, TT_KEEP, TP_KEEPINIT(tp)); 578 error = tcp_output(tp); 579 580 out: 581 TCPDEBUG2(PRU_CONNECT); 582 INP_WUNLOCK(inp); 583 return (error); 584 } 585 #endif /* INET6 */ 586 587 /* 588 * Initiate disconnect from peer. 589 * If connection never passed embryonic stage, just drop; 590 * else if don't need to let data drain, then can just drop anyways, 591 * else have to begin TCP shutdown process: mark socket disconnecting, 592 * drain unread data, state switch to reflect user close, and 593 * send segment (e.g. FIN) to peer. Socket will be really disconnected 594 * when peer sends FIN and acks ours. 595 * 596 * SHOULD IMPLEMENT LATER PRU_CONNECT VIA REALLOC TCPCB. 597 */ 598 static int 599 tcp_usr_disconnect(struct socket *so) 600 { 601 struct inpcb *inp; 602 struct tcpcb *tp = NULL; 603 int error = 0; 604 605 TCPDEBUG0; 606 INP_INFO_WLOCK(&V_tcbinfo); 607 inp = sotoinpcb(so); 608 KASSERT(inp != NULL, ("tcp_usr_disconnect: inp == NULL")); 609 INP_WLOCK(inp); 610 if (inp->inp_flags & INP_TIMEWAIT) 611 goto out; 612 if (inp->inp_flags & INP_DROPPED) { 613 error = ECONNRESET; 614 goto out; 615 } 616 tp = intotcpcb(inp); 617 TCPDEBUG1(); 618 tcp_disconnect(tp); 619 out: 620 TCPDEBUG2(PRU_DISCONNECT); 621 INP_WUNLOCK(inp); 622 INP_INFO_WUNLOCK(&V_tcbinfo); 623 return (error); 624 } 625 626 #ifdef INET 627 /* 628 * Accept a connection. Essentially all the work is done at higher levels; 629 * just return the address of the peer, storing through addr. 630 */ 631 static int 632 tcp_usr_accept(struct socket *so, struct sockaddr **nam) 633 { 634 int error = 0; 635 struct inpcb *inp = NULL; 636 struct tcpcb *tp = NULL; 637 struct in_addr addr; 638 in_port_t port = 0; 639 TCPDEBUG0; 640 641 if (so->so_state & SS_ISDISCONNECTED) 642 return (ECONNABORTED); 643 644 inp = sotoinpcb(so); 645 KASSERT(inp != NULL, ("tcp_usr_accept: inp == NULL")); 646 INP_WLOCK(inp); 647 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 648 error = ECONNABORTED; 649 goto out; 650 } 651 tp = intotcpcb(inp); 652 TCPDEBUG1(); 653 654 /* 655 * We inline in_getpeeraddr and COMMON_END here, so that we can 656 * copy the data of interest and defer the malloc until after we 657 * release the lock. 658 */ 659 port = inp->inp_fport; 660 addr = inp->inp_faddr; 661 662 out: 663 TCPDEBUG2(PRU_ACCEPT); 664 INP_WUNLOCK(inp); 665 if (error == 0) 666 *nam = in_sockaddr(port, &addr); 667 return error; 668 } 669 #endif /* INET */ 670 671 #ifdef INET6 672 static int 673 tcp6_usr_accept(struct socket *so, struct sockaddr **nam) 674 { 675 struct inpcb *inp = NULL; 676 int error = 0; 677 struct tcpcb *tp = NULL; 678 struct in_addr addr; 679 struct in6_addr addr6; 680 in_port_t port = 0; 681 int v4 = 0; 682 TCPDEBUG0; 683 684 if (so->so_state & SS_ISDISCONNECTED) 685 return (ECONNABORTED); 686 687 inp = sotoinpcb(so); 688 KASSERT(inp != NULL, ("tcp6_usr_accept: inp == NULL")); 689 INP_INFO_RLOCK(&V_tcbinfo); 690 INP_WLOCK(inp); 691 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 692 error = ECONNABORTED; 693 goto out; 694 } 695 tp = intotcpcb(inp); 696 TCPDEBUG1(); 697 698 /* 699 * We inline in6_mapped_peeraddr and COMMON_END here, so that we can 700 * copy the data of interest and defer the malloc until after we 701 * release the lock. 702 */ 703 if (inp->inp_vflag & INP_IPV4) { 704 v4 = 1; 705 port = inp->inp_fport; 706 addr = inp->inp_faddr; 707 } else { 708 port = inp->inp_fport; 709 addr6 = inp->in6p_faddr; 710 } 711 712 out: 713 TCPDEBUG2(PRU_ACCEPT); 714 INP_WUNLOCK(inp); 715 INP_INFO_RUNLOCK(&V_tcbinfo); 716 if (error == 0) { 717 if (v4) 718 *nam = in6_v4mapsin6_sockaddr(port, &addr); 719 else 720 *nam = in6_sockaddr(port, &addr6); 721 } 722 return error; 723 } 724 #endif /* INET6 */ 725 726 /* 727 * Mark the connection as being incapable of further output. 728 */ 729 static int 730 tcp_usr_shutdown(struct socket *so) 731 { 732 int error = 0; 733 struct inpcb *inp; 734 struct tcpcb *tp = NULL; 735 736 TCPDEBUG0; 737 INP_INFO_WLOCK(&V_tcbinfo); 738 inp = sotoinpcb(so); 739 KASSERT(inp != NULL, ("inp == NULL")); 740 INP_WLOCK(inp); 741 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 742 error = ECONNRESET; 743 goto out; 744 } 745 tp = intotcpcb(inp); 746 TCPDEBUG1(); 747 socantsendmore(so); 748 tcp_usrclosed(tp); 749 if (!(inp->inp_flags & INP_DROPPED)) 750 error = tcp_output(tp); 751 752 out: 753 TCPDEBUG2(PRU_SHUTDOWN); 754 INP_WUNLOCK(inp); 755 INP_INFO_WUNLOCK(&V_tcbinfo); 756 757 return (error); 758 } 759 760 /* 761 * After a receive, possibly send window update to peer. 762 */ 763 static int 764 tcp_usr_rcvd(struct socket *so, int flags) 765 { 766 struct inpcb *inp; 767 struct tcpcb *tp = NULL; 768 int error = 0; 769 770 TCPDEBUG0; 771 inp = sotoinpcb(so); 772 KASSERT(inp != NULL, ("tcp_usr_rcvd: inp == NULL")); 773 INP_WLOCK(inp); 774 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 775 error = ECONNRESET; 776 goto out; 777 } 778 tp = intotcpcb(inp); 779 TCPDEBUG1(); 780 #ifdef TCP_OFFLOAD 781 if (tp->t_flags & TF_TOE) 782 tcp_offload_rcvd(tp); 783 else 784 #endif 785 tcp_output(tp); 786 787 out: 788 TCPDEBUG2(PRU_RCVD); 789 INP_WUNLOCK(inp); 790 return (error); 791 } 792 793 /* 794 * Do a send by putting data in output queue and updating urgent 795 * marker if URG set. Possibly send more data. Unlike the other 796 * pru_*() routines, the mbuf chains are our responsibility. We 797 * must either enqueue them or free them. The other pru_* routines 798 * generally are caller-frees. 799 */ 800 static int 801 tcp_usr_send(struct socket *so, int flags, struct mbuf *m, 802 struct sockaddr *nam, struct mbuf *control, struct thread *td) 803 { 804 int error = 0; 805 struct inpcb *inp; 806 struct tcpcb *tp = NULL; 807 #ifdef INET6 808 int isipv6; 809 #endif 810 TCPDEBUG0; 811 812 /* 813 * We require the pcbinfo lock if we will close the socket as part of 814 * this call. 815 */ 816 if (flags & PRUS_EOF) 817 INP_INFO_WLOCK(&V_tcbinfo); 818 inp = sotoinpcb(so); 819 KASSERT(inp != NULL, ("tcp_usr_send: inp == NULL")); 820 INP_WLOCK(inp); 821 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 822 if (control) 823 m_freem(control); 824 /* 825 * In case of PRUS_NOTREADY, tcp_usr_ready() is responsible 826 * for freeing memory. 827 */ 828 if (m && (flags & PRUS_NOTREADY) == 0) 829 m_freem(m); 830 error = ECONNRESET; 831 goto out; 832 } 833 #ifdef INET6 834 isipv6 = nam && nam->sa_family == AF_INET6; 835 #endif /* INET6 */ 836 tp = intotcpcb(inp); 837 TCPDEBUG1(); 838 if (control) { 839 /* TCP doesn't do control messages (rights, creds, etc) */ 840 if (control->m_len) { 841 m_freem(control); 842 if (m) 843 m_freem(m); 844 error = EINVAL; 845 goto out; 846 } 847 m_freem(control); /* empty control, just free it */ 848 } 849 if (!(flags & PRUS_OOB)) { 850 sbappendstream(&so->so_snd, m, flags); 851 if (nam && tp->t_state < TCPS_SYN_SENT) { 852 /* 853 * Do implied connect if not yet connected, 854 * initialize window to default value, and 855 * initialize maxseg/maxopd using peer's cached 856 * MSS. 857 */ 858 #ifdef INET6 859 if (isipv6) 860 error = tcp6_connect(tp, nam, td); 861 #endif /* INET6 */ 862 #if defined(INET6) && defined(INET) 863 else 864 #endif 865 #ifdef INET 866 error = tcp_connect(tp, nam, td); 867 #endif 868 if (error) 869 goto out; 870 tp->snd_wnd = TTCP_CLIENT_SND_WND; 871 tcp_mss(tp, -1); 872 } 873 if (flags & PRUS_EOF) { 874 /* 875 * Close the send side of the connection after 876 * the data is sent. 877 */ 878 INP_INFO_WLOCK_ASSERT(&V_tcbinfo); 879 socantsendmore(so); 880 tcp_usrclosed(tp); 881 } 882 if (!(inp->inp_flags & INP_DROPPED) && 883 !(flags & PRUS_NOTREADY)) { 884 if (flags & PRUS_MORETOCOME) 885 tp->t_flags |= TF_MORETOCOME; 886 error = tcp_output(tp); 887 if (flags & PRUS_MORETOCOME) 888 tp->t_flags &= ~TF_MORETOCOME; 889 } 890 } else { 891 /* 892 * XXXRW: PRUS_EOF not implemented with PRUS_OOB? 893 */ 894 SOCKBUF_LOCK(&so->so_snd); 895 if (sbspace(&so->so_snd) < -512) { 896 SOCKBUF_UNLOCK(&so->so_snd); 897 m_freem(m); 898 error = ENOBUFS; 899 goto out; 900 } 901 /* 902 * According to RFC961 (Assigned Protocols), 903 * the urgent pointer points to the last octet 904 * of urgent data. We continue, however, 905 * to consider it to indicate the first octet 906 * of data past the urgent section. 907 * Otherwise, snd_up should be one lower. 908 */ 909 sbappendstream_locked(&so->so_snd, m, flags); 910 SOCKBUF_UNLOCK(&so->so_snd); 911 if (nam && tp->t_state < TCPS_SYN_SENT) { 912 /* 913 * Do implied connect if not yet connected, 914 * initialize window to default value, and 915 * initialize maxseg/maxopd using peer's cached 916 * MSS. 917 */ 918 #ifdef INET6 919 if (isipv6) 920 error = tcp6_connect(tp, nam, td); 921 #endif /* INET6 */ 922 #if defined(INET6) && defined(INET) 923 else 924 #endif 925 #ifdef INET 926 error = tcp_connect(tp, nam, td); 927 #endif 928 if (error) 929 goto out; 930 tp->snd_wnd = TTCP_CLIENT_SND_WND; 931 tcp_mss(tp, -1); 932 } 933 tp->snd_up = tp->snd_una + sbavail(&so->so_snd); 934 if (!(flags & PRUS_NOTREADY)) { 935 tp->t_flags |= TF_FORCEDATA; 936 error = tcp_output(tp); 937 tp->t_flags &= ~TF_FORCEDATA; 938 } 939 } 940 out: 941 TCPDEBUG2((flags & PRUS_OOB) ? PRU_SENDOOB : 942 ((flags & PRUS_EOF) ? PRU_SEND_EOF : PRU_SEND)); 943 INP_WUNLOCK(inp); 944 if (flags & PRUS_EOF) 945 INP_INFO_WUNLOCK(&V_tcbinfo); 946 return (error); 947 } 948 949 static int 950 tcp_usr_ready(struct socket *so, struct mbuf *m, int count) 951 { 952 struct inpcb *inp; 953 struct tcpcb *tp; 954 int error; 955 956 inp = sotoinpcb(so); 957 INP_WLOCK(inp); 958 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 959 INP_WUNLOCK(inp); 960 for (int i = 0; i < count; i++) 961 m = m_free(m); 962 return (ECONNRESET); 963 } 964 tp = intotcpcb(inp); 965 966 SOCKBUF_LOCK(&so->so_snd); 967 error = sbready(&so->so_snd, m, count); 968 SOCKBUF_UNLOCK(&so->so_snd); 969 if (error == 0) 970 error = tcp_output(tp); 971 INP_WUNLOCK(inp); 972 973 return (error); 974 } 975 976 /* 977 * Abort the TCP. Drop the connection abruptly. 978 */ 979 static void 980 tcp_usr_abort(struct socket *so) 981 { 982 struct inpcb *inp; 983 struct tcpcb *tp = NULL; 984 TCPDEBUG0; 985 986 inp = sotoinpcb(so); 987 KASSERT(inp != NULL, ("tcp_usr_abort: inp == NULL")); 988 989 INP_INFO_WLOCK(&V_tcbinfo); 990 INP_WLOCK(inp); 991 KASSERT(inp->inp_socket != NULL, 992 ("tcp_usr_abort: inp_socket == NULL")); 993 994 /* 995 * If we still have full TCP state, and we're not dropped, drop. 996 */ 997 if (!(inp->inp_flags & INP_TIMEWAIT) && 998 !(inp->inp_flags & INP_DROPPED)) { 999 tp = intotcpcb(inp); 1000 TCPDEBUG1(); 1001 tcp_drop(tp, ECONNABORTED); 1002 TCPDEBUG2(PRU_ABORT); 1003 } 1004 if (!(inp->inp_flags & INP_DROPPED)) { 1005 SOCK_LOCK(so); 1006 so->so_state |= SS_PROTOREF; 1007 SOCK_UNLOCK(so); 1008 inp->inp_flags |= INP_SOCKREF; 1009 } 1010 INP_WUNLOCK(inp); 1011 INP_INFO_WUNLOCK(&V_tcbinfo); 1012 } 1013 1014 /* 1015 * TCP socket is closed. Start friendly disconnect. 1016 */ 1017 static void 1018 tcp_usr_close(struct socket *so) 1019 { 1020 struct inpcb *inp; 1021 struct tcpcb *tp = NULL; 1022 TCPDEBUG0; 1023 1024 inp = sotoinpcb(so); 1025 KASSERT(inp != NULL, ("tcp_usr_close: inp == NULL")); 1026 1027 INP_INFO_WLOCK(&V_tcbinfo); 1028 INP_WLOCK(inp); 1029 KASSERT(inp->inp_socket != NULL, 1030 ("tcp_usr_close: inp_socket == NULL")); 1031 1032 /* 1033 * If we still have full TCP state, and we're not dropped, initiate 1034 * a disconnect. 1035 */ 1036 if (!(inp->inp_flags & INP_TIMEWAIT) && 1037 !(inp->inp_flags & INP_DROPPED)) { 1038 tp = intotcpcb(inp); 1039 TCPDEBUG1(); 1040 tcp_disconnect(tp); 1041 TCPDEBUG2(PRU_CLOSE); 1042 } 1043 if (!(inp->inp_flags & INP_DROPPED)) { 1044 SOCK_LOCK(so); 1045 so->so_state |= SS_PROTOREF; 1046 SOCK_UNLOCK(so); 1047 inp->inp_flags |= INP_SOCKREF; 1048 } 1049 INP_WUNLOCK(inp); 1050 INP_INFO_WUNLOCK(&V_tcbinfo); 1051 } 1052 1053 /* 1054 * Receive out-of-band data. 1055 */ 1056 static int 1057 tcp_usr_rcvoob(struct socket *so, struct mbuf *m, int flags) 1058 { 1059 int error = 0; 1060 struct inpcb *inp; 1061 struct tcpcb *tp = NULL; 1062 1063 TCPDEBUG0; 1064 inp = sotoinpcb(so); 1065 KASSERT(inp != NULL, ("tcp_usr_rcvoob: inp == NULL")); 1066 INP_WLOCK(inp); 1067 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 1068 error = ECONNRESET; 1069 goto out; 1070 } 1071 tp = intotcpcb(inp); 1072 TCPDEBUG1(); 1073 if ((so->so_oobmark == 0 && 1074 (so->so_rcv.sb_state & SBS_RCVATMARK) == 0) || 1075 so->so_options & SO_OOBINLINE || 1076 tp->t_oobflags & TCPOOB_HADDATA) { 1077 error = EINVAL; 1078 goto out; 1079 } 1080 if ((tp->t_oobflags & TCPOOB_HAVEDATA) == 0) { 1081 error = EWOULDBLOCK; 1082 goto out; 1083 } 1084 m->m_len = 1; 1085 *mtod(m, caddr_t) = tp->t_iobc; 1086 if ((flags & MSG_PEEK) == 0) 1087 tp->t_oobflags ^= (TCPOOB_HAVEDATA | TCPOOB_HADDATA); 1088 1089 out: 1090 TCPDEBUG2(PRU_RCVOOB); 1091 INP_WUNLOCK(inp); 1092 return (error); 1093 } 1094 1095 #ifdef INET 1096 struct pr_usrreqs tcp_usrreqs = { 1097 .pru_abort = tcp_usr_abort, 1098 .pru_accept = tcp_usr_accept, 1099 .pru_attach = tcp_usr_attach, 1100 .pru_bind = tcp_usr_bind, 1101 .pru_connect = tcp_usr_connect, 1102 .pru_control = in_control, 1103 .pru_detach = tcp_usr_detach, 1104 .pru_disconnect = tcp_usr_disconnect, 1105 .pru_listen = tcp_usr_listen, 1106 .pru_peeraddr = in_getpeeraddr, 1107 .pru_rcvd = tcp_usr_rcvd, 1108 .pru_rcvoob = tcp_usr_rcvoob, 1109 .pru_send = tcp_usr_send, 1110 .pru_ready = tcp_usr_ready, 1111 .pru_shutdown = tcp_usr_shutdown, 1112 .pru_sockaddr = in_getsockaddr, 1113 .pru_sosetlabel = in_pcbsosetlabel, 1114 .pru_close = tcp_usr_close, 1115 }; 1116 #endif /* INET */ 1117 1118 #ifdef INET6 1119 struct pr_usrreqs tcp6_usrreqs = { 1120 .pru_abort = tcp_usr_abort, 1121 .pru_accept = tcp6_usr_accept, 1122 .pru_attach = tcp_usr_attach, 1123 .pru_bind = tcp6_usr_bind, 1124 .pru_connect = tcp6_usr_connect, 1125 .pru_control = in6_control, 1126 .pru_detach = tcp_usr_detach, 1127 .pru_disconnect = tcp_usr_disconnect, 1128 .pru_listen = tcp6_usr_listen, 1129 .pru_peeraddr = in6_mapped_peeraddr, 1130 .pru_rcvd = tcp_usr_rcvd, 1131 .pru_rcvoob = tcp_usr_rcvoob, 1132 .pru_send = tcp_usr_send, 1133 .pru_ready = tcp_usr_ready, 1134 .pru_shutdown = tcp_usr_shutdown, 1135 .pru_sockaddr = in6_mapped_sockaddr, 1136 .pru_sosetlabel = in_pcbsosetlabel, 1137 .pru_close = tcp_usr_close, 1138 }; 1139 #endif /* INET6 */ 1140 1141 #ifdef INET 1142 /* 1143 * Common subroutine to open a TCP connection to remote host specified 1144 * by struct sockaddr_in in mbuf *nam. Call in_pcbbind to assign a local 1145 * port number if needed. Call in_pcbconnect_setup to do the routing and 1146 * to choose a local host address (interface). If there is an existing 1147 * incarnation of the same connection in TIME-WAIT state and if the remote 1148 * host was sending CC options and if the connection duration was < MSL, then 1149 * truncate the previous TIME-WAIT state and proceed. 1150 * Initialize connection parameters and enter SYN-SENT state. 1151 */ 1152 static int 1153 tcp_connect(struct tcpcb *tp, struct sockaddr *nam, struct thread *td) 1154 { 1155 struct inpcb *inp = tp->t_inpcb, *oinp; 1156 struct socket *so = inp->inp_socket; 1157 struct in_addr laddr; 1158 u_short lport; 1159 int error; 1160 1161 INP_WLOCK_ASSERT(inp); 1162 INP_HASH_WLOCK(&V_tcbinfo); 1163 1164 if (inp->inp_lport == 0) { 1165 error = in_pcbbind(inp, (struct sockaddr *)0, td->td_ucred); 1166 if (error) 1167 goto out; 1168 } 1169 1170 /* 1171 * Cannot simply call in_pcbconnect, because there might be an 1172 * earlier incarnation of this same connection still in 1173 * TIME_WAIT state, creating an ADDRINUSE error. 1174 */ 1175 laddr = inp->inp_laddr; 1176 lport = inp->inp_lport; 1177 error = in_pcbconnect_setup(inp, nam, &laddr.s_addr, &lport, 1178 &inp->inp_faddr.s_addr, &inp->inp_fport, &oinp, td->td_ucred); 1179 if (error && oinp == NULL) 1180 goto out; 1181 if (oinp) { 1182 error = EADDRINUSE; 1183 goto out; 1184 } 1185 inp->inp_laddr = laddr; 1186 in_pcbrehash(inp); 1187 INP_HASH_WUNLOCK(&V_tcbinfo); 1188 1189 /* 1190 * Compute window scaling to request: 1191 * Scale to fit into sweet spot. See tcp_syncache.c. 1192 * XXX: This should move to tcp_output(). 1193 */ 1194 while (tp->request_r_scale < TCP_MAX_WINSHIFT && 1195 (TCP_MAXWIN << tp->request_r_scale) < sb_max) 1196 tp->request_r_scale++; 1197 1198 soisconnecting(so); 1199 TCPSTAT_INC(tcps_connattempt); 1200 tcp_state_change(tp, TCPS_SYN_SENT); 1201 tp->iss = tcp_new_isn(tp); 1202 tcp_sendseqinit(tp); 1203 1204 return 0; 1205 1206 out: 1207 INP_HASH_WUNLOCK(&V_tcbinfo); 1208 return (error); 1209 } 1210 #endif /* INET */ 1211 1212 #ifdef INET6 1213 static int 1214 tcp6_connect(struct tcpcb *tp, struct sockaddr *nam, struct thread *td) 1215 { 1216 struct inpcb *inp = tp->t_inpcb; 1217 int error; 1218 1219 INP_WLOCK_ASSERT(inp); 1220 INP_HASH_WLOCK(&V_tcbinfo); 1221 1222 if (inp->inp_lport == 0) { 1223 error = in6_pcbbind(inp, (struct sockaddr *)0, td->td_ucred); 1224 if (error) 1225 goto out; 1226 } 1227 error = in6_pcbconnect(inp, nam, td->td_ucred); 1228 if (error != 0) 1229 goto out; 1230 INP_HASH_WUNLOCK(&V_tcbinfo); 1231 1232 /* Compute window scaling to request. */ 1233 while (tp->request_r_scale < TCP_MAX_WINSHIFT && 1234 (TCP_MAXWIN << tp->request_r_scale) < sb_max) 1235 tp->request_r_scale++; 1236 1237 soisconnecting(inp->inp_socket); 1238 TCPSTAT_INC(tcps_connattempt); 1239 tcp_state_change(tp, TCPS_SYN_SENT); 1240 tp->iss = tcp_new_isn(tp); 1241 tcp_sendseqinit(tp); 1242 1243 return 0; 1244 1245 out: 1246 INP_HASH_WUNLOCK(&V_tcbinfo); 1247 return error; 1248 } 1249 #endif /* INET6 */ 1250 1251 /* 1252 * Export TCP internal state information via a struct tcp_info, based on the 1253 * Linux 2.6 API. Not ABI compatible as our constants are mapped differently 1254 * (TCP state machine, etc). We export all information using FreeBSD-native 1255 * constants -- for example, the numeric values for tcpi_state will differ 1256 * from Linux. 1257 */ 1258 static void 1259 tcp_fill_info(struct tcpcb *tp, struct tcp_info *ti) 1260 { 1261 1262 INP_WLOCK_ASSERT(tp->t_inpcb); 1263 bzero(ti, sizeof(*ti)); 1264 1265 ti->tcpi_state = tp->t_state; 1266 if ((tp->t_flags & TF_REQ_TSTMP) && (tp->t_flags & TF_RCVD_TSTMP)) 1267 ti->tcpi_options |= TCPI_OPT_TIMESTAMPS; 1268 if (tp->t_flags & TF_SACK_PERMIT) 1269 ti->tcpi_options |= TCPI_OPT_SACK; 1270 if ((tp->t_flags & TF_REQ_SCALE) && (tp->t_flags & TF_RCVD_SCALE)) { 1271 ti->tcpi_options |= TCPI_OPT_WSCALE; 1272 ti->tcpi_snd_wscale = tp->snd_scale; 1273 ti->tcpi_rcv_wscale = tp->rcv_scale; 1274 } 1275 1276 ti->tcpi_rto = tp->t_rxtcur * tick; 1277 ti->tcpi_last_data_recv = (long)(ticks - (int)tp->t_rcvtime) * tick; 1278 ti->tcpi_rtt = ((u_int64_t)tp->t_srtt * tick) >> TCP_RTT_SHIFT; 1279 ti->tcpi_rttvar = ((u_int64_t)tp->t_rttvar * tick) >> TCP_RTTVAR_SHIFT; 1280 1281 ti->tcpi_snd_ssthresh = tp->snd_ssthresh; 1282 ti->tcpi_snd_cwnd = tp->snd_cwnd; 1283 1284 /* 1285 * FreeBSD-specific extension fields for tcp_info. 1286 */ 1287 ti->tcpi_rcv_space = tp->rcv_wnd; 1288 ti->tcpi_rcv_nxt = tp->rcv_nxt; 1289 ti->tcpi_snd_wnd = tp->snd_wnd; 1290 ti->tcpi_snd_bwnd = 0; /* Unused, kept for compat. */ 1291 ti->tcpi_snd_nxt = tp->snd_nxt; 1292 ti->tcpi_snd_mss = tp->t_maxseg; 1293 ti->tcpi_rcv_mss = tp->t_maxseg; 1294 if (tp->t_flags & TF_TOE) 1295 ti->tcpi_options |= TCPI_OPT_TOE; 1296 ti->tcpi_snd_rexmitpack = tp->t_sndrexmitpack; 1297 ti->tcpi_rcv_ooopack = tp->t_rcvoopack; 1298 ti->tcpi_snd_zerowin = tp->t_sndzerowin; 1299 } 1300 1301 /* 1302 * tcp_ctloutput() must drop the inpcb lock before performing copyin on 1303 * socket option arguments. When it re-acquires the lock after the copy, it 1304 * has to revalidate that the connection is still valid for the socket 1305 * option. 1306 */ 1307 #define INP_WLOCK_RECHECK(inp) do { \ 1308 INP_WLOCK(inp); \ 1309 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { \ 1310 INP_WUNLOCK(inp); \ 1311 return (ECONNRESET); \ 1312 } \ 1313 tp = intotcpcb(inp); \ 1314 } while(0) 1315 1316 int 1317 tcp_ctloutput(struct socket *so, struct sockopt *sopt) 1318 { 1319 int error, opt, optval; 1320 u_int ui; 1321 struct inpcb *inp; 1322 struct tcpcb *tp; 1323 struct tcp_info ti; 1324 char buf[TCP_CA_NAME_MAX]; 1325 struct cc_algo *algo; 1326 1327 error = 0; 1328 inp = sotoinpcb(so); 1329 KASSERT(inp != NULL, ("tcp_ctloutput: inp == NULL")); 1330 INP_WLOCK(inp); 1331 if (sopt->sopt_level != IPPROTO_TCP) { 1332 #ifdef INET6 1333 if (inp->inp_vflag & INP_IPV6PROTO) { 1334 INP_WUNLOCK(inp); 1335 error = ip6_ctloutput(so, sopt); 1336 } 1337 #endif /* INET6 */ 1338 #if defined(INET6) && defined(INET) 1339 else 1340 #endif 1341 #ifdef INET 1342 { 1343 INP_WUNLOCK(inp); 1344 error = ip_ctloutput(so, sopt); 1345 } 1346 #endif 1347 return (error); 1348 } 1349 if (inp->inp_flags & (INP_TIMEWAIT | INP_DROPPED)) { 1350 INP_WUNLOCK(inp); 1351 return (ECONNRESET); 1352 } 1353 1354 switch (sopt->sopt_dir) { 1355 case SOPT_SET: 1356 switch (sopt->sopt_name) { 1357 #ifdef TCP_SIGNATURE 1358 case TCP_MD5SIG: 1359 INP_WUNLOCK(inp); 1360 error = sooptcopyin(sopt, &optval, sizeof optval, 1361 sizeof optval); 1362 if (error) 1363 return (error); 1364 1365 INP_WLOCK_RECHECK(inp); 1366 if (optval > 0) 1367 tp->t_flags |= TF_SIGNATURE; 1368 else 1369 tp->t_flags &= ~TF_SIGNATURE; 1370 goto unlock_and_done; 1371 #endif /* TCP_SIGNATURE */ 1372 1373 case TCP_NODELAY: 1374 case TCP_NOOPT: 1375 INP_WUNLOCK(inp); 1376 error = sooptcopyin(sopt, &optval, sizeof optval, 1377 sizeof optval); 1378 if (error) 1379 return (error); 1380 1381 INP_WLOCK_RECHECK(inp); 1382 switch (sopt->sopt_name) { 1383 case TCP_NODELAY: 1384 opt = TF_NODELAY; 1385 break; 1386 case TCP_NOOPT: 1387 opt = TF_NOOPT; 1388 break; 1389 default: 1390 opt = 0; /* dead code to fool gcc */ 1391 break; 1392 } 1393 1394 if (optval) 1395 tp->t_flags |= opt; 1396 else 1397 tp->t_flags &= ~opt; 1398 unlock_and_done: 1399 #ifdef TCP_OFFLOAD 1400 if (tp->t_flags & TF_TOE) { 1401 tcp_offload_ctloutput(tp, sopt->sopt_dir, 1402 sopt->sopt_name); 1403 } 1404 #endif 1405 INP_WUNLOCK(inp); 1406 break; 1407 1408 case TCP_NOPUSH: 1409 INP_WUNLOCK(inp); 1410 error = sooptcopyin(sopt, &optval, sizeof optval, 1411 sizeof optval); 1412 if (error) 1413 return (error); 1414 1415 INP_WLOCK_RECHECK(inp); 1416 if (optval) 1417 tp->t_flags |= TF_NOPUSH; 1418 else if (tp->t_flags & TF_NOPUSH) { 1419 tp->t_flags &= ~TF_NOPUSH; 1420 if (TCPS_HAVEESTABLISHED(tp->t_state)) 1421 error = tcp_output(tp); 1422 } 1423 goto unlock_and_done; 1424 1425 case TCP_MAXSEG: 1426 INP_WUNLOCK(inp); 1427 error = sooptcopyin(sopt, &optval, sizeof optval, 1428 sizeof optval); 1429 if (error) 1430 return (error); 1431 1432 INP_WLOCK_RECHECK(inp); 1433 if (optval > 0 && optval <= tp->t_maxseg && 1434 optval + 40 >= V_tcp_minmss) 1435 tp->t_maxseg = optval; 1436 else 1437 error = EINVAL; 1438 goto unlock_and_done; 1439 1440 case TCP_INFO: 1441 INP_WUNLOCK(inp); 1442 error = EINVAL; 1443 break; 1444 1445 case TCP_CONGESTION: 1446 INP_WUNLOCK(inp); 1447 bzero(buf, sizeof(buf)); 1448 error = sooptcopyin(sopt, &buf, sizeof(buf), 1); 1449 if (error) 1450 break; 1451 INP_WLOCK_RECHECK(inp); 1452 /* 1453 * Return EINVAL if we can't find the requested cc algo. 1454 */ 1455 error = EINVAL; 1456 CC_LIST_RLOCK(); 1457 STAILQ_FOREACH(algo, &cc_list, entries) { 1458 if (strncmp(buf, algo->name, TCP_CA_NAME_MAX) 1459 == 0) { 1460 /* We've found the requested algo. */ 1461 error = 0; 1462 /* 1463 * We hold a write lock over the tcb 1464 * so it's safe to do these things 1465 * without ordering concerns. 1466 */ 1467 if (CC_ALGO(tp)->cb_destroy != NULL) 1468 CC_ALGO(tp)->cb_destroy(tp->ccv); 1469 CC_ALGO(tp) = algo; 1470 /* 1471 * If something goes pear shaped 1472 * initialising the new algo, 1473 * fall back to newreno (which 1474 * does not require initialisation). 1475 */ 1476 if (algo->cb_init != NULL) 1477 if (algo->cb_init(tp->ccv) > 0) { 1478 CC_ALGO(tp) = &newreno_cc_algo; 1479 /* 1480 * The only reason init 1481 * should fail is 1482 * because of malloc. 1483 */ 1484 error = ENOMEM; 1485 } 1486 break; /* Break the STAILQ_FOREACH. */ 1487 } 1488 } 1489 CC_LIST_RUNLOCK(); 1490 goto unlock_and_done; 1491 1492 case TCP_KEEPIDLE: 1493 case TCP_KEEPINTVL: 1494 case TCP_KEEPINIT: 1495 INP_WUNLOCK(inp); 1496 error = sooptcopyin(sopt, &ui, sizeof(ui), sizeof(ui)); 1497 if (error) 1498 return (error); 1499 1500 if (ui > (UINT_MAX / hz)) { 1501 error = EINVAL; 1502 break; 1503 } 1504 ui *= hz; 1505 1506 INP_WLOCK_RECHECK(inp); 1507 switch (sopt->sopt_name) { 1508 case TCP_KEEPIDLE: 1509 tp->t_keepidle = ui; 1510 /* 1511 * XXX: better check current remaining 1512 * timeout and "merge" it with new value. 1513 */ 1514 if ((tp->t_state > TCPS_LISTEN) && 1515 (tp->t_state <= TCPS_CLOSING)) 1516 tcp_timer_activate(tp, TT_KEEP, 1517 TP_KEEPIDLE(tp)); 1518 break; 1519 case TCP_KEEPINTVL: 1520 tp->t_keepintvl = ui; 1521 if ((tp->t_state == TCPS_FIN_WAIT_2) && 1522 (TP_MAXIDLE(tp) > 0)) 1523 tcp_timer_activate(tp, TT_2MSL, 1524 TP_MAXIDLE(tp)); 1525 break; 1526 case TCP_KEEPINIT: 1527 tp->t_keepinit = ui; 1528 if (tp->t_state == TCPS_SYN_RECEIVED || 1529 tp->t_state == TCPS_SYN_SENT) 1530 tcp_timer_activate(tp, TT_KEEP, 1531 TP_KEEPINIT(tp)); 1532 break; 1533 } 1534 goto unlock_and_done; 1535 1536 case TCP_KEEPCNT: 1537 INP_WUNLOCK(inp); 1538 error = sooptcopyin(sopt, &ui, sizeof(ui), sizeof(ui)); 1539 if (error) 1540 return (error); 1541 1542 INP_WLOCK_RECHECK(inp); 1543 tp->t_keepcnt = ui; 1544 if ((tp->t_state == TCPS_FIN_WAIT_2) && 1545 (TP_MAXIDLE(tp) > 0)) 1546 tcp_timer_activate(tp, TT_2MSL, 1547 TP_MAXIDLE(tp)); 1548 goto unlock_and_done; 1549 1550 default: 1551 INP_WUNLOCK(inp); 1552 error = ENOPROTOOPT; 1553 break; 1554 } 1555 break; 1556 1557 case SOPT_GET: 1558 tp = intotcpcb(inp); 1559 switch (sopt->sopt_name) { 1560 #ifdef TCP_SIGNATURE 1561 case TCP_MD5SIG: 1562 optval = (tp->t_flags & TF_SIGNATURE) ? 1 : 0; 1563 INP_WUNLOCK(inp); 1564 error = sooptcopyout(sopt, &optval, sizeof optval); 1565 break; 1566 #endif 1567 1568 case TCP_NODELAY: 1569 optval = tp->t_flags & TF_NODELAY; 1570 INP_WUNLOCK(inp); 1571 error = sooptcopyout(sopt, &optval, sizeof optval); 1572 break; 1573 case TCP_MAXSEG: 1574 optval = tp->t_maxseg; 1575 INP_WUNLOCK(inp); 1576 error = sooptcopyout(sopt, &optval, sizeof optval); 1577 break; 1578 case TCP_NOOPT: 1579 optval = tp->t_flags & TF_NOOPT; 1580 INP_WUNLOCK(inp); 1581 error = sooptcopyout(sopt, &optval, sizeof optval); 1582 break; 1583 case TCP_NOPUSH: 1584 optval = tp->t_flags & TF_NOPUSH; 1585 INP_WUNLOCK(inp); 1586 error = sooptcopyout(sopt, &optval, sizeof optval); 1587 break; 1588 case TCP_INFO: 1589 tcp_fill_info(tp, &ti); 1590 INP_WUNLOCK(inp); 1591 error = sooptcopyout(sopt, &ti, sizeof ti); 1592 break; 1593 case TCP_CONGESTION: 1594 bzero(buf, sizeof(buf)); 1595 strlcpy(buf, CC_ALGO(tp)->name, TCP_CA_NAME_MAX); 1596 INP_WUNLOCK(inp); 1597 error = sooptcopyout(sopt, buf, TCP_CA_NAME_MAX); 1598 break; 1599 case TCP_KEEPIDLE: 1600 case TCP_KEEPINTVL: 1601 case TCP_KEEPINIT: 1602 case TCP_KEEPCNT: 1603 switch (sopt->sopt_name) { 1604 case TCP_KEEPIDLE: 1605 ui = tp->t_keepidle / hz; 1606 break; 1607 case TCP_KEEPINTVL: 1608 ui = tp->t_keepintvl / hz; 1609 break; 1610 case TCP_KEEPINIT: 1611 ui = tp->t_keepinit / hz; 1612 break; 1613 case TCP_KEEPCNT: 1614 ui = tp->t_keepcnt; 1615 break; 1616 } 1617 INP_WUNLOCK(inp); 1618 error = sooptcopyout(sopt, &ui, sizeof(ui)); 1619 break; 1620 default: 1621 INP_WUNLOCK(inp); 1622 error = ENOPROTOOPT; 1623 break; 1624 } 1625 break; 1626 } 1627 return (error); 1628 } 1629 #undef INP_WLOCK_RECHECK 1630 1631 /* 1632 * Attach TCP protocol to socket, allocating 1633 * internet protocol control block, tcp control block, 1634 * bufer space, and entering LISTEN state if to accept connections. 1635 */ 1636 static int 1637 tcp_attach(struct socket *so) 1638 { 1639 struct tcpcb *tp; 1640 struct inpcb *inp; 1641 int error; 1642 1643 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 1644 error = soreserve(so, V_tcp_sendspace, V_tcp_recvspace); 1645 if (error) 1646 return (error); 1647 } 1648 so->so_rcv.sb_flags |= SB_AUTOSIZE; 1649 so->so_snd.sb_flags |= SB_AUTOSIZE; 1650 INP_INFO_WLOCK(&V_tcbinfo); 1651 error = in_pcballoc(so, &V_tcbinfo); 1652 if (error) { 1653 INP_INFO_WUNLOCK(&V_tcbinfo); 1654 return (error); 1655 } 1656 inp = sotoinpcb(so); 1657 #ifdef INET6 1658 if (inp->inp_vflag & INP_IPV6PROTO) { 1659 inp->inp_vflag |= INP_IPV6; 1660 inp->in6p_hops = -1; /* use kernel default */ 1661 } 1662 else 1663 #endif 1664 inp->inp_vflag |= INP_IPV4; 1665 tp = tcp_newtcpcb(inp); 1666 if (tp == NULL) { 1667 in_pcbdetach(inp); 1668 in_pcbfree(inp); 1669 INP_INFO_WUNLOCK(&V_tcbinfo); 1670 return (ENOBUFS); 1671 } 1672 tp->t_state = TCPS_CLOSED; 1673 INP_WUNLOCK(inp); 1674 INP_INFO_WUNLOCK(&V_tcbinfo); 1675 return (0); 1676 } 1677 1678 /* 1679 * Initiate (or continue) disconnect. 1680 * If embryonic state, just send reset (once). 1681 * If in ``let data drain'' option and linger null, just drop. 1682 * Otherwise (hard), mark socket disconnecting and drop 1683 * current input data; switch states based on user close, and 1684 * send segment to peer (with FIN). 1685 */ 1686 static void 1687 tcp_disconnect(struct tcpcb *tp) 1688 { 1689 struct inpcb *inp = tp->t_inpcb; 1690 struct socket *so = inp->inp_socket; 1691 1692 INP_INFO_WLOCK_ASSERT(&V_tcbinfo); 1693 INP_WLOCK_ASSERT(inp); 1694 1695 /* 1696 * Neither tcp_close() nor tcp_drop() should return NULL, as the 1697 * socket is still open. 1698 */ 1699 if (tp->t_state < TCPS_ESTABLISHED) { 1700 tp = tcp_close(tp); 1701 KASSERT(tp != NULL, 1702 ("tcp_disconnect: tcp_close() returned NULL")); 1703 } else if ((so->so_options & SO_LINGER) && so->so_linger == 0) { 1704 tp = tcp_drop(tp, 0); 1705 KASSERT(tp != NULL, 1706 ("tcp_disconnect: tcp_drop() returned NULL")); 1707 } else { 1708 soisdisconnecting(so); 1709 sbflush(&so->so_rcv); 1710 tcp_usrclosed(tp); 1711 if (!(inp->inp_flags & INP_DROPPED)) 1712 tcp_output(tp); 1713 } 1714 } 1715 1716 /* 1717 * User issued close, and wish to trail through shutdown states: 1718 * if never received SYN, just forget it. If got a SYN from peer, 1719 * but haven't sent FIN, then go to FIN_WAIT_1 state to send peer a FIN. 1720 * If already got a FIN from peer, then almost done; go to LAST_ACK 1721 * state. In all other cases, have already sent FIN to peer (e.g. 1722 * after PRU_SHUTDOWN), and just have to play tedious game waiting 1723 * for peer to send FIN or not respond to keep-alives, etc. 1724 * We can let the user exit from the close as soon as the FIN is acked. 1725 */ 1726 static void 1727 tcp_usrclosed(struct tcpcb *tp) 1728 { 1729 1730 INP_INFO_WLOCK_ASSERT(&V_tcbinfo); 1731 INP_WLOCK_ASSERT(tp->t_inpcb); 1732 1733 switch (tp->t_state) { 1734 case TCPS_LISTEN: 1735 #ifdef TCP_OFFLOAD 1736 tcp_offload_listen_stop(tp); 1737 #endif 1738 /* FALLTHROUGH */ 1739 case TCPS_CLOSED: 1740 tcp_state_change(tp, TCPS_CLOSED); 1741 tp = tcp_close(tp); 1742 /* 1743 * tcp_close() should never return NULL here as the socket is 1744 * still open. 1745 */ 1746 KASSERT(tp != NULL, 1747 ("tcp_usrclosed: tcp_close() returned NULL")); 1748 break; 1749 1750 case TCPS_SYN_SENT: 1751 case TCPS_SYN_RECEIVED: 1752 tp->t_flags |= TF_NEEDFIN; 1753 break; 1754 1755 case TCPS_ESTABLISHED: 1756 tcp_state_change(tp, TCPS_FIN_WAIT_1); 1757 break; 1758 1759 case TCPS_CLOSE_WAIT: 1760 tcp_state_change(tp, TCPS_LAST_ACK); 1761 break; 1762 } 1763 if (tp->t_state >= TCPS_FIN_WAIT_2) { 1764 soisdisconnected(tp->t_inpcb->inp_socket); 1765 /* Prevent the connection hanging in FIN_WAIT_2 forever. */ 1766 if (tp->t_state == TCPS_FIN_WAIT_2) { 1767 int timeout; 1768 1769 timeout = (tcp_fast_finwait2_recycle) ? 1770 tcp_finwait2_timeout : TP_MAXIDLE(tp); 1771 tcp_timer_activate(tp, TT_2MSL, timeout); 1772 } 1773 } 1774 } 1775 1776 #ifdef DDB 1777 static void 1778 db_print_indent(int indent) 1779 { 1780 int i; 1781 1782 for (i = 0; i < indent; i++) 1783 db_printf(" "); 1784 } 1785 1786 static void 1787 db_print_tstate(int t_state) 1788 { 1789 1790 switch (t_state) { 1791 case TCPS_CLOSED: 1792 db_printf("TCPS_CLOSED"); 1793 return; 1794 1795 case TCPS_LISTEN: 1796 db_printf("TCPS_LISTEN"); 1797 return; 1798 1799 case TCPS_SYN_SENT: 1800 db_printf("TCPS_SYN_SENT"); 1801 return; 1802 1803 case TCPS_SYN_RECEIVED: 1804 db_printf("TCPS_SYN_RECEIVED"); 1805 return; 1806 1807 case TCPS_ESTABLISHED: 1808 db_printf("TCPS_ESTABLISHED"); 1809 return; 1810 1811 case TCPS_CLOSE_WAIT: 1812 db_printf("TCPS_CLOSE_WAIT"); 1813 return; 1814 1815 case TCPS_FIN_WAIT_1: 1816 db_printf("TCPS_FIN_WAIT_1"); 1817 return; 1818 1819 case TCPS_CLOSING: 1820 db_printf("TCPS_CLOSING"); 1821 return; 1822 1823 case TCPS_LAST_ACK: 1824 db_printf("TCPS_LAST_ACK"); 1825 return; 1826 1827 case TCPS_FIN_WAIT_2: 1828 db_printf("TCPS_FIN_WAIT_2"); 1829 return; 1830 1831 case TCPS_TIME_WAIT: 1832 db_printf("TCPS_TIME_WAIT"); 1833 return; 1834 1835 default: 1836 db_printf("unknown"); 1837 return; 1838 } 1839 } 1840 1841 static void 1842 db_print_tflags(u_int t_flags) 1843 { 1844 int comma; 1845 1846 comma = 0; 1847 if (t_flags & TF_ACKNOW) { 1848 db_printf("%sTF_ACKNOW", comma ? ", " : ""); 1849 comma = 1; 1850 } 1851 if (t_flags & TF_DELACK) { 1852 db_printf("%sTF_DELACK", comma ? ", " : ""); 1853 comma = 1; 1854 } 1855 if (t_flags & TF_NODELAY) { 1856 db_printf("%sTF_NODELAY", comma ? ", " : ""); 1857 comma = 1; 1858 } 1859 if (t_flags & TF_NOOPT) { 1860 db_printf("%sTF_NOOPT", comma ? ", " : ""); 1861 comma = 1; 1862 } 1863 if (t_flags & TF_SENTFIN) { 1864 db_printf("%sTF_SENTFIN", comma ? ", " : ""); 1865 comma = 1; 1866 } 1867 if (t_flags & TF_REQ_SCALE) { 1868 db_printf("%sTF_REQ_SCALE", comma ? ", " : ""); 1869 comma = 1; 1870 } 1871 if (t_flags & TF_RCVD_SCALE) { 1872 db_printf("%sTF_RECVD_SCALE", comma ? ", " : ""); 1873 comma = 1; 1874 } 1875 if (t_flags & TF_REQ_TSTMP) { 1876 db_printf("%sTF_REQ_TSTMP", comma ? ", " : ""); 1877 comma = 1; 1878 } 1879 if (t_flags & TF_RCVD_TSTMP) { 1880 db_printf("%sTF_RCVD_TSTMP", comma ? ", " : ""); 1881 comma = 1; 1882 } 1883 if (t_flags & TF_SACK_PERMIT) { 1884 db_printf("%sTF_SACK_PERMIT", comma ? ", " : ""); 1885 comma = 1; 1886 } 1887 if (t_flags & TF_NEEDSYN) { 1888 db_printf("%sTF_NEEDSYN", comma ? ", " : ""); 1889 comma = 1; 1890 } 1891 if (t_flags & TF_NEEDFIN) { 1892 db_printf("%sTF_NEEDFIN", comma ? ", " : ""); 1893 comma = 1; 1894 } 1895 if (t_flags & TF_NOPUSH) { 1896 db_printf("%sTF_NOPUSH", comma ? ", " : ""); 1897 comma = 1; 1898 } 1899 if (t_flags & TF_MORETOCOME) { 1900 db_printf("%sTF_MORETOCOME", comma ? ", " : ""); 1901 comma = 1; 1902 } 1903 if (t_flags & TF_LQ_OVERFLOW) { 1904 db_printf("%sTF_LQ_OVERFLOW", comma ? ", " : ""); 1905 comma = 1; 1906 } 1907 if (t_flags & TF_LASTIDLE) { 1908 db_printf("%sTF_LASTIDLE", comma ? ", " : ""); 1909 comma = 1; 1910 } 1911 if (t_flags & TF_RXWIN0SENT) { 1912 db_printf("%sTF_RXWIN0SENT", comma ? ", " : ""); 1913 comma = 1; 1914 } 1915 if (t_flags & TF_FASTRECOVERY) { 1916 db_printf("%sTF_FASTRECOVERY", comma ? ", " : ""); 1917 comma = 1; 1918 } 1919 if (t_flags & TF_CONGRECOVERY) { 1920 db_printf("%sTF_CONGRECOVERY", comma ? ", " : ""); 1921 comma = 1; 1922 } 1923 if (t_flags & TF_WASFRECOVERY) { 1924 db_printf("%sTF_WASFRECOVERY", comma ? ", " : ""); 1925 comma = 1; 1926 } 1927 if (t_flags & TF_SIGNATURE) { 1928 db_printf("%sTF_SIGNATURE", comma ? ", " : ""); 1929 comma = 1; 1930 } 1931 if (t_flags & TF_FORCEDATA) { 1932 db_printf("%sTF_FORCEDATA", comma ? ", " : ""); 1933 comma = 1; 1934 } 1935 if (t_flags & TF_TSO) { 1936 db_printf("%sTF_TSO", comma ? ", " : ""); 1937 comma = 1; 1938 } 1939 if (t_flags & TF_ECN_PERMIT) { 1940 db_printf("%sTF_ECN_PERMIT", comma ? ", " : ""); 1941 comma = 1; 1942 } 1943 } 1944 1945 static void 1946 db_print_toobflags(char t_oobflags) 1947 { 1948 int comma; 1949 1950 comma = 0; 1951 if (t_oobflags & TCPOOB_HAVEDATA) { 1952 db_printf("%sTCPOOB_HAVEDATA", comma ? ", " : ""); 1953 comma = 1; 1954 } 1955 if (t_oobflags & TCPOOB_HADDATA) { 1956 db_printf("%sTCPOOB_HADDATA", comma ? ", " : ""); 1957 comma = 1; 1958 } 1959 } 1960 1961 static void 1962 db_print_tcpcb(struct tcpcb *tp, const char *name, int indent) 1963 { 1964 1965 db_print_indent(indent); 1966 db_printf("%s at %p\n", name, tp); 1967 1968 indent += 2; 1969 1970 db_print_indent(indent); 1971 db_printf("t_segq first: %p t_segqlen: %d t_dupacks: %d\n", 1972 tp->t_segq, tp->t_segqlen, tp->t_dupacks); 1973 1974 db_print_indent(indent); 1975 db_printf("tt_rexmt: %p tt_persist: %p tt_keep: %p\n", 1976 &tp->t_timers->tt_rexmt, &tp->t_timers->tt_persist, &tp->t_timers->tt_keep); 1977 1978 db_print_indent(indent); 1979 db_printf("tt_2msl: %p tt_delack: %p t_inpcb: %p\n", &tp->t_timers->tt_2msl, 1980 &tp->t_timers->tt_delack, tp->t_inpcb); 1981 1982 db_print_indent(indent); 1983 db_printf("t_state: %d (", tp->t_state); 1984 db_print_tstate(tp->t_state); 1985 db_printf(")\n"); 1986 1987 db_print_indent(indent); 1988 db_printf("t_flags: 0x%x (", tp->t_flags); 1989 db_print_tflags(tp->t_flags); 1990 db_printf(")\n"); 1991 1992 db_print_indent(indent); 1993 db_printf("snd_una: 0x%08x snd_max: 0x%08x snd_nxt: x0%08x\n", 1994 tp->snd_una, tp->snd_max, tp->snd_nxt); 1995 1996 db_print_indent(indent); 1997 db_printf("snd_up: 0x%08x snd_wl1: 0x%08x snd_wl2: 0x%08x\n", 1998 tp->snd_up, tp->snd_wl1, tp->snd_wl2); 1999 2000 db_print_indent(indent); 2001 db_printf("iss: 0x%08x irs: 0x%08x rcv_nxt: 0x%08x\n", 2002 tp->iss, tp->irs, tp->rcv_nxt); 2003 2004 db_print_indent(indent); 2005 db_printf("rcv_adv: 0x%08x rcv_wnd: %lu rcv_up: 0x%08x\n", 2006 tp->rcv_adv, tp->rcv_wnd, tp->rcv_up); 2007 2008 db_print_indent(indent); 2009 db_printf("snd_wnd: %lu snd_cwnd: %lu\n", 2010 tp->snd_wnd, tp->snd_cwnd); 2011 2012 db_print_indent(indent); 2013 db_printf("snd_ssthresh: %lu snd_recover: " 2014 "0x%08x\n", tp->snd_ssthresh, tp->snd_recover); 2015 2016 db_print_indent(indent); 2017 db_printf("t_maxopd: %u t_rcvtime: %u t_startime: %u\n", 2018 tp->t_maxopd, tp->t_rcvtime, tp->t_starttime); 2019 2020 db_print_indent(indent); 2021 db_printf("t_rttime: %u t_rtsq: 0x%08x\n", 2022 tp->t_rtttime, tp->t_rtseq); 2023 2024 db_print_indent(indent); 2025 db_printf("t_rxtcur: %d t_maxseg: %u t_srtt: %d\n", 2026 tp->t_rxtcur, tp->t_maxseg, tp->t_srtt); 2027 2028 db_print_indent(indent); 2029 db_printf("t_rttvar: %d t_rxtshift: %d t_rttmin: %u " 2030 "t_rttbest: %u\n", tp->t_rttvar, tp->t_rxtshift, tp->t_rttmin, 2031 tp->t_rttbest); 2032 2033 db_print_indent(indent); 2034 db_printf("t_rttupdated: %lu max_sndwnd: %lu t_softerror: %d\n", 2035 tp->t_rttupdated, tp->max_sndwnd, tp->t_softerror); 2036 2037 db_print_indent(indent); 2038 db_printf("t_oobflags: 0x%x (", tp->t_oobflags); 2039 db_print_toobflags(tp->t_oobflags); 2040 db_printf(") t_iobc: 0x%02x\n", tp->t_iobc); 2041 2042 db_print_indent(indent); 2043 db_printf("snd_scale: %u rcv_scale: %u request_r_scale: %u\n", 2044 tp->snd_scale, tp->rcv_scale, tp->request_r_scale); 2045 2046 db_print_indent(indent); 2047 db_printf("ts_recent: %u ts_recent_age: %u\n", 2048 tp->ts_recent, tp->ts_recent_age); 2049 2050 db_print_indent(indent); 2051 db_printf("ts_offset: %u last_ack_sent: 0x%08x snd_cwnd_prev: " 2052 "%lu\n", tp->ts_offset, tp->last_ack_sent, tp->snd_cwnd_prev); 2053 2054 db_print_indent(indent); 2055 db_printf("snd_ssthresh_prev: %lu snd_recover_prev: 0x%08x " 2056 "t_badrxtwin: %u\n", tp->snd_ssthresh_prev, 2057 tp->snd_recover_prev, tp->t_badrxtwin); 2058 2059 db_print_indent(indent); 2060 db_printf("snd_numholes: %d snd_holes first: %p\n", 2061 tp->snd_numholes, TAILQ_FIRST(&tp->snd_holes)); 2062 2063 db_print_indent(indent); 2064 db_printf("snd_fack: 0x%08x rcv_numsacks: %d sack_newdata: " 2065 "0x%08x\n", tp->snd_fack, tp->rcv_numsacks, tp->sack_newdata); 2066 2067 /* Skip sackblks, sackhint. */ 2068 2069 db_print_indent(indent); 2070 db_printf("t_rttlow: %d rfbuf_ts: %u rfbuf_cnt: %d\n", 2071 tp->t_rttlow, tp->rfbuf_ts, tp->rfbuf_cnt); 2072 } 2073 2074 DB_SHOW_COMMAND(tcpcb, db_show_tcpcb) 2075 { 2076 struct tcpcb *tp; 2077 2078 if (!have_addr) { 2079 db_printf("usage: show tcpcb <addr>\n"); 2080 return; 2081 } 2082 tp = (struct tcpcb *)addr; 2083 2084 db_print_tcpcb(tp, "tcpcb", 0); 2085 } 2086 #endif 2087