tcp_usrreq.c revision 1.182
1 /* $NetBSD: tcp_usrreq.c,v 1.182 2014/07/07 07:09:58 rtr Exp $ */ 2 3 /* 4 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the project nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 */ 31 32 /*- 33 * Copyright (c) 1997, 1998, 2005, 2006 The NetBSD Foundation, Inc. 34 * All rights reserved. 35 * 36 * This code is derived from software contributed to The NetBSD Foundation 37 * by Jason R. Thorpe and Kevin M. Lahey of the Numerical Aerospace Simulation 38 * Facility, NASA Ames Research Center. 39 * This code is derived from software contributed to The NetBSD Foundation 40 * by Charles M. Hannum. 41 * This code is derived from software contributed to The NetBSD Foundation 42 * by Rui Paulo. 43 * 44 * Redistribution and use in source and binary forms, with or without 45 * modification, are permitted provided that the following conditions 46 * are met: 47 * 1. Redistributions of source code must retain the above copyright 48 * notice, this list of conditions and the following disclaimer. 49 * 2. Redistributions in binary form must reproduce the above copyright 50 * notice, this list of conditions and the following disclaimer in the 51 * documentation and/or other materials provided with the distribution. 52 * 53 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 54 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 55 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 56 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 57 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 58 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 59 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 60 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 61 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 62 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 63 * POSSIBILITY OF SUCH DAMAGE. 64 */ 65 66 /* 67 * Copyright (c) 1982, 1986, 1988, 1993, 1995 68 * The Regents of the University of California. All rights reserved. 69 * 70 * Redistribution and use in source and binary forms, with or without 71 * modification, are permitted provided that the following conditions 72 * are met: 73 * 1. Redistributions of source code must retain the above copyright 74 * notice, this list of conditions and the following disclaimer. 75 * 2. Redistributions in binary form must reproduce the above copyright 76 * notice, this list of conditions and the following disclaimer in the 77 * documentation and/or other materials provided with the distribution. 78 * 3. Neither the name of the University nor the names of its contributors 79 * may be used to endorse or promote products derived from this software 80 * without specific prior written permission. 81 * 82 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 83 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 84 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 85 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 86 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 87 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 88 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 89 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 90 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 91 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 92 * SUCH DAMAGE. 93 * 94 * @(#)tcp_usrreq.c 8.5 (Berkeley) 6/21/95 95 */ 96 97 /* 98 * TCP protocol interface to socket abstraction. 99 */ 100 101 #include <sys/cdefs.h> 102 __KERNEL_RCSID(0, "$NetBSD: tcp_usrreq.c,v 1.182 2014/07/07 07:09:58 rtr Exp $"); 103 104 #include "opt_inet.h" 105 #include "opt_ipsec.h" 106 #include "opt_tcp_debug.h" 107 #include "opt_mbuftrace.h" 108 109 #include <sys/param.h> 110 #include <sys/systm.h> 111 #include <sys/kernel.h> 112 #include <sys/malloc.h> 113 #include <sys/mbuf.h> 114 #include <sys/socket.h> 115 #include <sys/socketvar.h> 116 #include <sys/protosw.h> 117 #include <sys/errno.h> 118 #include <sys/stat.h> 119 #include <sys/proc.h> 120 #include <sys/domain.h> 121 #include <sys/sysctl.h> 122 #include <sys/kauth.h> 123 #include <sys/uidinfo.h> 124 125 #include <net/if.h> 126 #include <net/route.h> 127 128 #include <netinet/in.h> 129 #include <netinet/in_systm.h> 130 #include <netinet/in_var.h> 131 #include <netinet/ip.h> 132 #include <netinet/in_pcb.h> 133 #include <netinet/ip_var.h> 134 #include <netinet/in_offload.h> 135 136 #ifdef INET6 137 #ifndef INET 138 #include <netinet/in.h> 139 #endif 140 #include <netinet/ip6.h> 141 #include <netinet6/in6_pcb.h> 142 #include <netinet6/ip6_var.h> 143 #include <netinet6/scope6_var.h> 144 #endif 145 146 #include <netinet/tcp.h> 147 #include <netinet/tcp_fsm.h> 148 #include <netinet/tcp_seq.h> 149 #include <netinet/tcp_timer.h> 150 #include <netinet/tcp_var.h> 151 #include <netinet/tcp_private.h> 152 #include <netinet/tcp_congctl.h> 153 #include <netinet/tcpip.h> 154 #include <netinet/tcp_debug.h> 155 #include <netinet/tcp_vtw.h> 156 157 #include "opt_tcp_space.h" 158 159 /* 160 * Process a TCP user request for TCP tb. If this is a send request 161 * then m is the mbuf chain of send data. If this is a timer expiration 162 * (called from the software clock routine), then timertype tells which timer. 163 */ 164 static int 165 tcp_usrreq(struct socket *so, int req, struct mbuf *m, struct mbuf *nam, 166 struct mbuf *control, struct lwp *l) 167 { 168 struct inpcb *inp; 169 #ifdef INET6 170 struct in6pcb *in6p; 171 #endif 172 struct tcpcb *tp = NULL; 173 int s; 174 int error = 0; 175 #ifdef TCP_DEBUG 176 int ostate = 0; 177 #endif 178 int family; /* family of the socket */ 179 180 KASSERT(req != PRU_ATTACH); 181 KASSERT(req != PRU_DETACH); 182 KASSERT(req != PRU_CONTROL); 183 KASSERT(req != PRU_SENSE); 184 185 family = so->so_proto->pr_domain->dom_family; 186 187 s = splsoftnet(); 188 189 if (req == PRU_PURGEIF) { 190 mutex_enter(softnet_lock); 191 switch (family) { 192 #ifdef INET 193 case PF_INET: 194 in_pcbpurgeif0(&tcbtable, (struct ifnet *)control); 195 in_purgeif((struct ifnet *)control); 196 in_pcbpurgeif(&tcbtable, (struct ifnet *)control); 197 break; 198 #endif 199 #ifdef INET6 200 case PF_INET6: 201 in6_pcbpurgeif0(&tcbtable, (struct ifnet *)control); 202 in6_purgeif((struct ifnet *)control); 203 in6_pcbpurgeif(&tcbtable, (struct ifnet *)control); 204 break; 205 #endif 206 default: 207 mutex_exit(softnet_lock); 208 splx(s); 209 return (EAFNOSUPPORT); 210 } 211 mutex_exit(softnet_lock); 212 splx(s); 213 return (0); 214 } 215 216 KASSERT(solocked(so)); 217 218 switch (family) { 219 #ifdef INET 220 case PF_INET: 221 inp = sotoinpcb(so); 222 #ifdef INET6 223 in6p = NULL; 224 #endif 225 break; 226 #endif 227 #ifdef INET6 228 case PF_INET6: 229 inp = NULL; 230 in6p = sotoin6pcb(so); 231 break; 232 #endif 233 default: 234 splx(s); 235 return EAFNOSUPPORT; 236 } 237 KASSERT(!control || (req == PRU_SEND || req == PRU_SENDOOB)); 238 #ifdef INET6 239 /* XXX: KASSERT((inp != NULL) ^ (in6p != NULL)); */ 240 #endif 241 /* 242 * When a TCP is attached to a socket, then there will be 243 * a (struct inpcb) pointed at by the socket, and this 244 * structure will point at a subsidary (struct tcpcb). 245 */ 246 if (inp == NULL 247 #ifdef INET6 248 && in6p == NULL 249 #endif 250 ) 251 { 252 error = EINVAL; 253 goto release; 254 } 255 #ifdef INET 256 if (inp) { 257 tp = intotcpcb(inp); 258 /* WHAT IF TP IS 0? */ 259 #ifdef KPROF 260 tcp_acounts[tp->t_state][req]++; 261 #endif 262 #ifdef TCP_DEBUG 263 ostate = tp->t_state; 264 #endif 265 } 266 #endif 267 #ifdef INET6 268 if (in6p) { 269 tp = in6totcpcb(in6p); 270 /* WHAT IF TP IS 0? */ 271 #ifdef KPROF 272 tcp_acounts[tp->t_state][req]++; 273 #endif 274 #ifdef TCP_DEBUG 275 ostate = tp->t_state; 276 #endif 277 } 278 #endif 279 280 switch (req) { 281 282 /* 283 * Give the socket an address. 284 */ 285 case PRU_BIND: 286 switch (family) { 287 #ifdef INET 288 case PF_INET: 289 error = in_pcbbind(inp, nam, l); 290 break; 291 #endif 292 #ifdef INET6 293 case PF_INET6: 294 error = in6_pcbbind(in6p, nam, l); 295 if (!error) { 296 /* mapped addr case */ 297 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 298 tp->t_family = AF_INET; 299 else 300 tp->t_family = AF_INET6; 301 } 302 break; 303 #endif 304 } 305 break; 306 307 /* 308 * Prepare to accept connections. 309 */ 310 case PRU_LISTEN: 311 #ifdef INET 312 if (inp && inp->inp_lport == 0) { 313 error = in_pcbbind(inp, NULL, l); 314 if (error) 315 break; 316 } 317 #endif 318 #ifdef INET6 319 if (in6p && in6p->in6p_lport == 0) { 320 error = in6_pcbbind(in6p, NULL, l); 321 if (error) 322 break; 323 } 324 #endif 325 tp->t_state = TCPS_LISTEN; 326 break; 327 328 /* 329 * Initiate connection to peer. 330 * Create a template for use in transmissions on this connection. 331 * Enter SYN_SENT state, and mark socket as connecting. 332 * Start keep-alive timer, and seed output sequence space. 333 * Send initial segment on connection. 334 */ 335 case PRU_CONNECT: 336 #ifdef INET 337 if (inp) { 338 if (inp->inp_lport == 0) { 339 error = in_pcbbind(inp, NULL, l); 340 if (error) 341 break; 342 } 343 error = in_pcbconnect(inp, nam, l); 344 } 345 #endif 346 #ifdef INET6 347 if (in6p) { 348 if (in6p->in6p_lport == 0) { 349 error = in6_pcbbind(in6p, NULL, l); 350 if (error) 351 break; 352 } 353 error = in6_pcbconnect(in6p, nam, l); 354 if (!error) { 355 /* mapped addr case */ 356 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) 357 tp->t_family = AF_INET; 358 else 359 tp->t_family = AF_INET6; 360 } 361 } 362 #endif 363 if (error) 364 break; 365 tp->t_template = tcp_template(tp); 366 if (tp->t_template == 0) { 367 #ifdef INET 368 if (inp) 369 in_pcbdisconnect(inp); 370 #endif 371 #ifdef INET6 372 if (in6p) 373 in6_pcbdisconnect(in6p); 374 #endif 375 error = ENOBUFS; 376 break; 377 } 378 /* 379 * Compute window scaling to request. 380 * XXX: This should be moved to tcp_output(). 381 */ 382 while (tp->request_r_scale < TCP_MAX_WINSHIFT && 383 (TCP_MAXWIN << tp->request_r_scale) < sb_max) 384 tp->request_r_scale++; 385 soisconnecting(so); 386 TCP_STATINC(TCP_STAT_CONNATTEMPT); 387 tp->t_state = TCPS_SYN_SENT; 388 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepinit); 389 tp->iss = tcp_new_iss(tp, 0); 390 tcp_sendseqinit(tp); 391 error = tcp_output(tp); 392 break; 393 394 /* 395 * Create a TCP connection between two sockets. 396 */ 397 case PRU_CONNECT2: 398 error = EOPNOTSUPP; 399 break; 400 401 /* 402 * Initiate disconnect from peer. 403 * If connection never passed embryonic stage, just drop; 404 * else if don't need to let data drain, then can just drop anyways, 405 * else have to begin TCP shutdown process: mark socket disconnecting, 406 * drain unread data, state switch to reflect user close, and 407 * send segment (e.g. FIN) to peer. Socket will be really disconnected 408 * when peer sends FIN and acks ours. 409 * 410 * SHOULD IMPLEMENT LATER PRU_CONNECT VIA REALLOC TCPCB. 411 */ 412 case PRU_DISCONNECT: 413 tp = tcp_disconnect(tp); 414 break; 415 416 /* 417 * Accept a connection. Essentially all the work is 418 * done at higher levels; just return the address 419 * of the peer, storing through addr. 420 */ 421 case PRU_ACCEPT: 422 #ifdef INET 423 if (inp) 424 in_setpeeraddr(inp, nam); 425 #endif 426 #ifdef INET6 427 if (in6p) 428 in6_setpeeraddr(in6p, nam); 429 #endif 430 break; 431 432 /* 433 * Mark the connection as being incapable of further output. 434 */ 435 case PRU_SHUTDOWN: 436 socantsendmore(so); 437 tp = tcp_usrclosed(tp); 438 if (tp) 439 error = tcp_output(tp); 440 break; 441 442 /* 443 * After a receive, possibly send window update to peer. 444 */ 445 case PRU_RCVD: 446 /* 447 * soreceive() calls this function when a user receives 448 * ancillary data on a listening socket. We don't call 449 * tcp_output in such a case, since there is no header 450 * template for a listening socket and hence the kernel 451 * will panic. 452 */ 453 if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) != 0) 454 (void) tcp_output(tp); 455 break; 456 457 /* 458 * Do a send by putting data in output queue and updating urgent 459 * marker if URG set. Possibly send more data. 460 */ 461 case PRU_SEND: 462 if (control && control->m_len) { 463 m_freem(control); 464 m_freem(m); 465 error = EINVAL; 466 break; 467 } 468 sbappendstream(&so->so_snd, m); 469 error = tcp_output(tp); 470 break; 471 472 /* 473 * Abort the TCP. 474 */ 475 case PRU_ABORT: 476 tp = tcp_drop(tp, ECONNABORTED); 477 break; 478 479 case PRU_RCVOOB: 480 if (control && control->m_len) { 481 m_freem(control); 482 m_freem(m); 483 error = EINVAL; 484 break; 485 } 486 if ((so->so_oobmark == 0 && 487 (so->so_state & SS_RCVATMARK) == 0) || 488 so->so_options & SO_OOBINLINE || 489 tp->t_oobflags & TCPOOB_HADDATA) { 490 error = EINVAL; 491 break; 492 } 493 if ((tp->t_oobflags & TCPOOB_HAVEDATA) == 0) { 494 error = EWOULDBLOCK; 495 break; 496 } 497 m->m_len = 1; 498 *mtod(m, char *) = tp->t_iobc; 499 if (((long)nam & MSG_PEEK) == 0) 500 tp->t_oobflags ^= (TCPOOB_HAVEDATA | TCPOOB_HADDATA); 501 break; 502 503 case PRU_SENDOOB: 504 if (sbspace(&so->so_snd) < -512) { 505 m_freem(m); 506 error = ENOBUFS; 507 break; 508 } 509 /* 510 * According to RFC961 (Assigned Protocols), 511 * the urgent pointer points to the last octet 512 * of urgent data. We continue, however, 513 * to consider it to indicate the first octet 514 * of data past the urgent section. 515 * Otherwise, snd_up should be one lower. 516 */ 517 sbappendstream(&so->so_snd, m); 518 tp->snd_up = tp->snd_una + so->so_snd.sb_cc; 519 tp->t_force = 1; 520 error = tcp_output(tp); 521 tp->t_force = 0; 522 break; 523 524 case PRU_SOCKADDR: 525 #ifdef INET 526 if (inp) 527 in_setsockaddr(inp, nam); 528 #endif 529 #ifdef INET6 530 if (in6p) 531 in6_setsockaddr(in6p, nam); 532 #endif 533 break; 534 535 case PRU_PEERADDR: 536 #ifdef INET 537 if (inp) 538 in_setpeeraddr(inp, nam); 539 #endif 540 #ifdef INET6 541 if (in6p) 542 in6_setpeeraddr(in6p, nam); 543 #endif 544 break; 545 546 default: 547 panic("tcp_usrreq"); 548 } 549 #ifdef TCP_DEBUG 550 if (tp && (so->so_options & SO_DEBUG)) 551 tcp_trace(TA_USER, ostate, tp, NULL, req); 552 #endif 553 554 release: 555 splx(s); 556 return (error); 557 } 558 559 static void 560 change_keepalive(struct socket *so, struct tcpcb *tp) 561 { 562 tp->t_maxidle = tp->t_keepcnt * tp->t_keepintvl; 563 TCP_TIMER_DISARM(tp, TCPT_KEEP); 564 TCP_TIMER_DISARM(tp, TCPT_2MSL); 565 566 if (tp->t_state == TCPS_SYN_RECEIVED || 567 tp->t_state == TCPS_SYN_SENT) { 568 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepinit); 569 } else if (so->so_options & SO_KEEPALIVE && 570 tp->t_state <= TCPS_CLOSE_WAIT) { 571 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepintvl); 572 } else { 573 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepidle); 574 } 575 576 if ((tp->t_state == TCPS_FIN_WAIT_2) && (tp->t_maxidle > 0)) 577 TCP_TIMER_ARM(tp, TCPT_2MSL, tp->t_maxidle); 578 } 579 580 581 int 582 tcp_ctloutput(int op, struct socket *so, struct sockopt *sopt) 583 { 584 int error = 0, s; 585 struct inpcb *inp; 586 #ifdef INET6 587 struct in6pcb *in6p; 588 #endif 589 struct tcpcb *tp; 590 u_int ui; 591 int family; /* family of the socket */ 592 int level, optname, optval; 593 594 level = sopt->sopt_level; 595 optname = sopt->sopt_name; 596 597 family = so->so_proto->pr_domain->dom_family; 598 599 s = splsoftnet(); 600 switch (family) { 601 #ifdef INET 602 case PF_INET: 603 inp = sotoinpcb(so); 604 #ifdef INET6 605 in6p = NULL; 606 #endif 607 break; 608 #endif 609 #ifdef INET6 610 case PF_INET6: 611 inp = NULL; 612 in6p = sotoin6pcb(so); 613 break; 614 #endif 615 default: 616 splx(s); 617 panic("%s: af %d", __func__, family); 618 } 619 #ifndef INET6 620 if (inp == NULL) 621 #else 622 if (inp == NULL && in6p == NULL) 623 #endif 624 { 625 splx(s); 626 return (ECONNRESET); 627 } 628 if (level != IPPROTO_TCP) { 629 switch (family) { 630 #ifdef INET 631 case PF_INET: 632 error = ip_ctloutput(op, so, sopt); 633 break; 634 #endif 635 #ifdef INET6 636 case PF_INET6: 637 error = ip6_ctloutput(op, so, sopt); 638 break; 639 #endif 640 } 641 splx(s); 642 return (error); 643 } 644 if (inp) 645 tp = intotcpcb(inp); 646 #ifdef INET6 647 else if (in6p) 648 tp = in6totcpcb(in6p); 649 #endif 650 else 651 tp = NULL; 652 653 switch (op) { 654 case PRCO_SETOPT: 655 switch (optname) { 656 #ifdef TCP_SIGNATURE 657 case TCP_MD5SIG: 658 error = sockopt_getint(sopt, &optval); 659 if (error) 660 break; 661 if (optval > 0) 662 tp->t_flags |= TF_SIGNATURE; 663 else 664 tp->t_flags &= ~TF_SIGNATURE; 665 break; 666 #endif /* TCP_SIGNATURE */ 667 668 case TCP_NODELAY: 669 error = sockopt_getint(sopt, &optval); 670 if (error) 671 break; 672 if (optval) 673 tp->t_flags |= TF_NODELAY; 674 else 675 tp->t_flags &= ~TF_NODELAY; 676 break; 677 678 case TCP_MAXSEG: 679 error = sockopt_getint(sopt, &optval); 680 if (error) 681 break; 682 if (optval > 0 && optval <= tp->t_peermss) 683 tp->t_peermss = optval; /* limit on send size */ 684 else 685 error = EINVAL; 686 break; 687 #ifdef notyet 688 case TCP_CONGCTL: 689 /* XXX string overflow XXX */ 690 error = tcp_congctl_select(tp, sopt->sopt_data); 691 break; 692 #endif 693 694 case TCP_KEEPIDLE: 695 error = sockopt_get(sopt, &ui, sizeof(ui)); 696 if (error) 697 break; 698 if (ui > 0) { 699 tp->t_keepidle = ui; 700 change_keepalive(so, tp); 701 } else 702 error = EINVAL; 703 break; 704 705 case TCP_KEEPINTVL: 706 error = sockopt_get(sopt, &ui, sizeof(ui)); 707 if (error) 708 break; 709 if (ui > 0) { 710 tp->t_keepintvl = ui; 711 change_keepalive(so, tp); 712 } else 713 error = EINVAL; 714 break; 715 716 case TCP_KEEPCNT: 717 error = sockopt_get(sopt, &ui, sizeof(ui)); 718 if (error) 719 break; 720 if (ui > 0) { 721 tp->t_keepcnt = ui; 722 change_keepalive(so, tp); 723 } else 724 error = EINVAL; 725 break; 726 727 case TCP_KEEPINIT: 728 error = sockopt_get(sopt, &ui, sizeof(ui)); 729 if (error) 730 break; 731 if (ui > 0) { 732 tp->t_keepinit = ui; 733 change_keepalive(so, tp); 734 } else 735 error = EINVAL; 736 break; 737 738 default: 739 error = ENOPROTOOPT; 740 break; 741 } 742 break; 743 744 case PRCO_GETOPT: 745 switch (optname) { 746 #ifdef TCP_SIGNATURE 747 case TCP_MD5SIG: 748 optval = (tp->t_flags & TF_SIGNATURE) ? 1 : 0; 749 error = sockopt_set(sopt, &optval, sizeof(optval)); 750 break; 751 #endif 752 case TCP_NODELAY: 753 optval = tp->t_flags & TF_NODELAY; 754 error = sockopt_set(sopt, &optval, sizeof(optval)); 755 break; 756 case TCP_MAXSEG: 757 optval = tp->t_peermss; 758 error = sockopt_set(sopt, &optval, sizeof(optval)); 759 break; 760 #ifdef notyet 761 case TCP_CONGCTL: 762 break; 763 #endif 764 default: 765 error = ENOPROTOOPT; 766 break; 767 } 768 break; 769 } 770 splx(s); 771 return (error); 772 } 773 774 #ifndef TCP_SENDSPACE 775 #define TCP_SENDSPACE 1024*32 776 #endif 777 int tcp_sendspace = TCP_SENDSPACE; 778 #ifndef TCP_RECVSPACE 779 #define TCP_RECVSPACE 1024*32 780 #endif 781 int tcp_recvspace = TCP_RECVSPACE; 782 783 /* 784 * tcp_attach: attach TCP protocol to socket, allocating internet protocol 785 * control block, TCP control block, buffer space and entering LISTEN state 786 * if to accept connections. 787 */ 788 static int 789 tcp_attach(struct socket *so, int proto) 790 { 791 struct tcpcb *tp; 792 struct inpcb *inp; 793 #ifdef INET6 794 struct in6pcb *in6p; 795 #endif 796 int s, error, family; 797 798 /* Assign the lock (must happen even if we will error out). */ 799 s = splsoftnet(); 800 sosetlock(so); 801 KASSERT(solocked(so)); 802 803 family = so->so_proto->pr_domain->dom_family; 804 switch (family) { 805 #ifdef INET 806 case PF_INET: 807 inp = sotoinpcb(so); 808 #ifdef INET6 809 in6p = NULL; 810 #endif 811 break; 812 #endif 813 #ifdef INET6 814 case PF_INET6: 815 inp = NULL; 816 in6p = sotoin6pcb(so); 817 break; 818 #endif 819 default: 820 error = EAFNOSUPPORT; 821 goto out; 822 } 823 824 KASSERT(inp == NULL); 825 #ifdef INET6 826 KASSERT(in6p == NULL); 827 #endif 828 829 #ifdef MBUFTRACE 830 so->so_mowner = &tcp_sock_mowner; 831 so->so_rcv.sb_mowner = &tcp_sock_rx_mowner; 832 so->so_snd.sb_mowner = &tcp_sock_tx_mowner; 833 #endif 834 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 835 error = soreserve(so, tcp_sendspace, tcp_recvspace); 836 if (error) 837 goto out; 838 } 839 840 so->so_rcv.sb_flags |= SB_AUTOSIZE; 841 so->so_snd.sb_flags |= SB_AUTOSIZE; 842 843 switch (family) { 844 #ifdef INET 845 case PF_INET: 846 error = in_pcballoc(so, &tcbtable); 847 if (error) 848 goto out; 849 inp = sotoinpcb(so); 850 #ifdef INET6 851 in6p = NULL; 852 #endif 853 break; 854 #endif 855 #ifdef INET6 856 case PF_INET6: 857 error = in6_pcballoc(so, &tcbtable); 858 if (error) 859 goto out; 860 inp = NULL; 861 in6p = sotoin6pcb(so); 862 break; 863 #endif 864 default: 865 error = EAFNOSUPPORT; 866 goto out; 867 } 868 if (inp) 869 tp = tcp_newtcpcb(family, (void *)inp); 870 #ifdef INET6 871 else if (in6p) 872 tp = tcp_newtcpcb(family, (void *)in6p); 873 #endif 874 else 875 tp = NULL; 876 877 if (tp == NULL) { 878 int nofd = so->so_state & SS_NOFDREF; /* XXX */ 879 880 so->so_state &= ~SS_NOFDREF; /* don't free the socket yet */ 881 #ifdef INET 882 if (inp) 883 in_pcbdetach(inp); 884 #endif 885 #ifdef INET6 886 if (in6p) 887 in6_pcbdetach(in6p); 888 #endif 889 so->so_state |= nofd; 890 error = ENOBUFS; 891 goto out; 892 } 893 tp->t_state = TCPS_CLOSED; 894 if ((so->so_options & SO_LINGER) && so->so_linger == 0) { 895 so->so_linger = TCP_LINGERTIME; 896 } 897 out: 898 KASSERT(solocked(so)); 899 splx(s); 900 return error; 901 } 902 903 static void 904 tcp_detach(struct socket *so) 905 { 906 struct inpcb *inp; 907 #ifdef INET6 908 struct in6pcb *in6p; 909 #endif 910 struct tcpcb *tp = NULL; 911 int s, family; 912 913 KASSERT(solocked(so)); 914 915 s = splsoftnet(); 916 family = so->so_proto->pr_domain->dom_family; 917 switch (family) { 918 #ifdef INET 919 case PF_INET: 920 inp = sotoinpcb(so); 921 tp = intotcpcb(inp); 922 break; 923 #endif 924 #ifdef INET6 925 case PF_INET6: 926 in6p = sotoin6pcb(so); 927 tp = in6totcpcb(in6p); 928 break; 929 #endif 930 default: 931 splx(s); 932 return; 933 } 934 KASSERT(tp != NULL); 935 (void)tcp_disconnect(tp); 936 splx(s); 937 } 938 939 static int 940 tcp_ioctl(struct socket *so, u_long cmd, void *nam, struct ifnet *ifp) 941 { 942 switch (so->so_proto->pr_domain->dom_family) { 943 #ifdef INET 944 case PF_INET: 945 return in_control(so, cmd, nam, ifp); 946 #endif 947 #ifdef INET6 948 case PF_INET6: 949 return in6_control(so, cmd, nam, ifp); 950 #endif 951 default: 952 return EAFNOSUPPORT; 953 } 954 } 955 956 static int 957 tcp_stat(struct socket *so, struct stat *ub) 958 { 959 return EOPNOTSUPP; 960 } 961 962 /* 963 * Initiate (or continue) disconnect. 964 * If embryonic state, just send reset (once). 965 * If in ``let data drain'' option and linger null, just drop. 966 * Otherwise (hard), mark socket disconnecting and drop 967 * current input data; switch states based on user close, and 968 * send segment to peer (with FIN). 969 */ 970 struct tcpcb * 971 tcp_disconnect(struct tcpcb *tp) 972 { 973 struct socket *so; 974 975 if (tp->t_inpcb) 976 so = tp->t_inpcb->inp_socket; 977 #ifdef INET6 978 else if (tp->t_in6pcb) 979 so = tp->t_in6pcb->in6p_socket; 980 #endif 981 else 982 so = NULL; 983 984 if (TCPS_HAVEESTABLISHED(tp->t_state) == 0) 985 tp = tcp_close(tp); 986 else if ((so->so_options & SO_LINGER) && so->so_linger == 0) 987 tp = tcp_drop(tp, 0); 988 else { 989 soisdisconnecting(so); 990 sbflush(&so->so_rcv); 991 tp = tcp_usrclosed(tp); 992 if (tp) 993 (void) tcp_output(tp); 994 } 995 return (tp); 996 } 997 998 /* 999 * User issued close, and wish to trail through shutdown states: 1000 * if never received SYN, just forget it. If got a SYN from peer, 1001 * but haven't sent FIN, then go to FIN_WAIT_1 state to send peer a FIN. 1002 * If already got a FIN from peer, then almost done; go to LAST_ACK 1003 * state. In all other cases, have already sent FIN to peer (e.g. 1004 * after PRU_SHUTDOWN), and just have to play tedious game waiting 1005 * for peer to send FIN or not respond to keep-alives, etc. 1006 * We can let the user exit from the close as soon as the FIN is acked. 1007 */ 1008 struct tcpcb * 1009 tcp_usrclosed(struct tcpcb *tp) 1010 { 1011 1012 switch (tp->t_state) { 1013 1014 case TCPS_CLOSED: 1015 case TCPS_LISTEN: 1016 case TCPS_SYN_SENT: 1017 tp->t_state = TCPS_CLOSED; 1018 tp = tcp_close(tp); 1019 break; 1020 1021 case TCPS_SYN_RECEIVED: 1022 case TCPS_ESTABLISHED: 1023 tp->t_state = TCPS_FIN_WAIT_1; 1024 break; 1025 1026 case TCPS_CLOSE_WAIT: 1027 tp->t_state = TCPS_LAST_ACK; 1028 break; 1029 } 1030 if (tp && tp->t_state >= TCPS_FIN_WAIT_2) { 1031 struct socket *so; 1032 if (tp->t_inpcb) 1033 so = tp->t_inpcb->inp_socket; 1034 #ifdef INET6 1035 else if (tp->t_in6pcb) 1036 so = tp->t_in6pcb->in6p_socket; 1037 #endif 1038 else 1039 so = NULL; 1040 if (so) 1041 soisdisconnected(so); 1042 /* 1043 * If we are in FIN_WAIT_2, we arrived here because the 1044 * application did a shutdown of the send side. Like the 1045 * case of a transition from FIN_WAIT_1 to FIN_WAIT_2 after 1046 * a full close, we start a timer to make sure sockets are 1047 * not left in FIN_WAIT_2 forever. 1048 */ 1049 if ((tp->t_state == TCPS_FIN_WAIT_2) && (tp->t_maxidle > 0)) 1050 TCP_TIMER_ARM(tp, TCPT_2MSL, tp->t_maxidle); 1051 else if (tp->t_state == TCPS_TIME_WAIT 1052 && ((tp->t_inpcb 1053 && (tcp4_vtw_enable & 1) 1054 && vtw_add(AF_INET, tp)) 1055 || 1056 (tp->t_in6pcb 1057 && (tcp6_vtw_enable & 1) 1058 && vtw_add(AF_INET6, tp)))) { 1059 tp = 0; 1060 } 1061 } 1062 return (tp); 1063 } 1064 1065 /* 1066 * sysctl helper routine for net.inet.ip.mssdflt. it can't be less 1067 * than 32. 1068 */ 1069 static int 1070 sysctl_net_inet_tcp_mssdflt(SYSCTLFN_ARGS) 1071 { 1072 int error, mssdflt; 1073 struct sysctlnode node; 1074 1075 mssdflt = tcp_mssdflt; 1076 node = *rnode; 1077 node.sysctl_data = &mssdflt; 1078 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1079 if (error || newp == NULL) 1080 return (error); 1081 1082 if (mssdflt < 32) 1083 return (EINVAL); 1084 tcp_mssdflt = mssdflt; 1085 1086 mutex_enter(softnet_lock); 1087 tcp_tcpcb_template(); 1088 mutex_exit(softnet_lock); 1089 1090 return (0); 1091 } 1092 1093 /* 1094 * sysctl helper for TCP CB template update 1095 */ 1096 static int 1097 sysctl_update_tcpcb_template(SYSCTLFN_ARGS) 1098 { 1099 int t, error; 1100 struct sysctlnode node; 1101 1102 /* follow procedures in sysctl(9) manpage */ 1103 t = *(int *)rnode->sysctl_data; 1104 node = *rnode; 1105 node.sysctl_data = &t; 1106 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1107 if (error || newp == NULL) 1108 return error; 1109 1110 if (t < 0) 1111 return EINVAL; 1112 1113 *(int *)rnode->sysctl_data = t; 1114 1115 mutex_enter(softnet_lock); 1116 tcp_tcpcb_template(); 1117 mutex_exit(softnet_lock); 1118 1119 return 0; 1120 } 1121 1122 /* 1123 * sysctl helper routine for setting port related values under 1124 * net.inet.ip and net.inet6.ip6. does basic range checking and does 1125 * additional checks for each type. this code has placed in 1126 * tcp_input.c since INET and INET6 both use the same tcp code. 1127 * 1128 * this helper is not static so that both inet and inet6 can use it. 1129 */ 1130 int 1131 sysctl_net_inet_ip_ports(SYSCTLFN_ARGS) 1132 { 1133 int error, tmp; 1134 int apmin, apmax; 1135 #ifndef IPNOPRIVPORTS 1136 int lpmin, lpmax; 1137 #endif /* IPNOPRIVPORTS */ 1138 struct sysctlnode node; 1139 1140 if (namelen != 0) 1141 return (EINVAL); 1142 1143 switch (name[-3]) { 1144 #ifdef INET 1145 case PF_INET: 1146 apmin = anonportmin; 1147 apmax = anonportmax; 1148 #ifndef IPNOPRIVPORTS 1149 lpmin = lowportmin; 1150 lpmax = lowportmax; 1151 #endif /* IPNOPRIVPORTS */ 1152 break; 1153 #endif /* INET */ 1154 #ifdef INET6 1155 case PF_INET6: 1156 apmin = ip6_anonportmin; 1157 apmax = ip6_anonportmax; 1158 #ifndef IPNOPRIVPORTS 1159 lpmin = ip6_lowportmin; 1160 lpmax = ip6_lowportmax; 1161 #endif /* IPNOPRIVPORTS */ 1162 break; 1163 #endif /* INET6 */ 1164 default: 1165 return (EINVAL); 1166 } 1167 1168 /* 1169 * insert temporary copy into node, perform lookup on 1170 * temporary, then restore pointer 1171 */ 1172 node = *rnode; 1173 tmp = *(int*)rnode->sysctl_data; 1174 node.sysctl_data = &tmp; 1175 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1176 if (error || newp == NULL) 1177 return (error); 1178 1179 /* 1180 * simple port range check 1181 */ 1182 if (tmp < 0 || tmp > 65535) 1183 return (EINVAL); 1184 1185 /* 1186 * per-node range checks 1187 */ 1188 switch (rnode->sysctl_num) { 1189 case IPCTL_ANONPORTMIN: 1190 case IPV6CTL_ANONPORTMIN: 1191 if (tmp >= apmax) 1192 return (EINVAL); 1193 #ifndef IPNOPRIVPORTS 1194 if (tmp < IPPORT_RESERVED) 1195 return (EINVAL); 1196 #endif /* IPNOPRIVPORTS */ 1197 break; 1198 1199 case IPCTL_ANONPORTMAX: 1200 case IPV6CTL_ANONPORTMAX: 1201 if (apmin >= tmp) 1202 return (EINVAL); 1203 #ifndef IPNOPRIVPORTS 1204 if (tmp < IPPORT_RESERVED) 1205 return (EINVAL); 1206 #endif /* IPNOPRIVPORTS */ 1207 break; 1208 1209 #ifndef IPNOPRIVPORTS 1210 case IPCTL_LOWPORTMIN: 1211 case IPV6CTL_LOWPORTMIN: 1212 if (tmp >= lpmax || 1213 tmp > IPPORT_RESERVEDMAX || 1214 tmp < IPPORT_RESERVEDMIN) 1215 return (EINVAL); 1216 break; 1217 1218 case IPCTL_LOWPORTMAX: 1219 case IPV6CTL_LOWPORTMAX: 1220 if (lpmin >= tmp || 1221 tmp > IPPORT_RESERVEDMAX || 1222 tmp < IPPORT_RESERVEDMIN) 1223 return (EINVAL); 1224 break; 1225 #endif /* IPNOPRIVPORTS */ 1226 1227 default: 1228 return (EINVAL); 1229 } 1230 1231 *(int*)rnode->sysctl_data = tmp; 1232 1233 return (0); 1234 } 1235 1236 static inline int 1237 copyout_uid(struct socket *sockp, void *oldp, size_t *oldlenp) 1238 { 1239 if (oldp) { 1240 size_t sz; 1241 uid_t uid; 1242 int error; 1243 1244 if (sockp->so_cred == NULL) 1245 return EPERM; 1246 1247 uid = kauth_cred_geteuid(sockp->so_cred); 1248 sz = MIN(sizeof(uid), *oldlenp); 1249 if ((error = copyout(&uid, oldp, sz)) != 0) 1250 return error; 1251 } 1252 *oldlenp = sizeof(uid_t); 1253 return 0; 1254 } 1255 1256 static inline int 1257 inet4_ident_core(struct in_addr raddr, u_int rport, 1258 struct in_addr laddr, u_int lport, 1259 void *oldp, size_t *oldlenp, 1260 struct lwp *l, int dodrop) 1261 { 1262 struct inpcb *inp; 1263 struct socket *sockp; 1264 1265 inp = in_pcblookup_connect(&tcbtable, raddr, rport, laddr, lport, 0); 1266 1267 if (inp == NULL || (sockp = inp->inp_socket) == NULL) 1268 return ESRCH; 1269 1270 if (dodrop) { 1271 struct tcpcb *tp; 1272 int error; 1273 1274 if (inp == NULL || (tp = intotcpcb(inp)) == NULL || 1275 (inp->inp_socket->so_options & SO_ACCEPTCONN) != 0) 1276 return ESRCH; 1277 1278 error = kauth_authorize_network(l->l_cred, KAUTH_NETWORK_SOCKET, 1279 KAUTH_REQ_NETWORK_SOCKET_DROP, inp->inp_socket, tp, NULL); 1280 if (error) 1281 return (error); 1282 1283 (void)tcp_drop(tp, ECONNABORTED); 1284 return 0; 1285 } 1286 else 1287 return copyout_uid(sockp, oldp, oldlenp); 1288 } 1289 1290 #ifdef INET6 1291 static inline int 1292 inet6_ident_core(struct in6_addr *raddr, u_int rport, 1293 struct in6_addr *laddr, u_int lport, 1294 void *oldp, size_t *oldlenp, 1295 struct lwp *l, int dodrop) 1296 { 1297 struct in6pcb *in6p; 1298 struct socket *sockp; 1299 1300 in6p = in6_pcblookup_connect(&tcbtable, raddr, rport, laddr, lport, 0, 0); 1301 1302 if (in6p == NULL || (sockp = in6p->in6p_socket) == NULL) 1303 return ESRCH; 1304 1305 if (dodrop) { 1306 struct tcpcb *tp; 1307 int error; 1308 1309 if (in6p == NULL || (tp = in6totcpcb(in6p)) == NULL || 1310 (in6p->in6p_socket->so_options & SO_ACCEPTCONN) != 0) 1311 return ESRCH; 1312 1313 error = kauth_authorize_network(l->l_cred, KAUTH_NETWORK_SOCKET, 1314 KAUTH_REQ_NETWORK_SOCKET_DROP, in6p->in6p_socket, tp, NULL); 1315 if (error) 1316 return (error); 1317 1318 (void)tcp_drop(tp, ECONNABORTED); 1319 return 0; 1320 } 1321 else 1322 return copyout_uid(sockp, oldp, oldlenp); 1323 } 1324 #endif 1325 1326 /* 1327 * sysctl helper routine for the net.inet.tcp.drop and 1328 * net.inet6.tcp6.drop nodes. 1329 */ 1330 #define sysctl_net_inet_tcp_drop sysctl_net_inet_tcp_ident 1331 1332 /* 1333 * sysctl helper routine for the net.inet.tcp.ident and 1334 * net.inet6.tcp6.ident nodes. contains backwards compat code for the 1335 * old way of looking up the ident information for ipv4 which involves 1336 * stuffing the port/addr pairs into the mib lookup. 1337 */ 1338 static int 1339 sysctl_net_inet_tcp_ident(SYSCTLFN_ARGS) 1340 { 1341 #ifdef INET 1342 struct sockaddr_in *si4[2]; 1343 #endif /* INET */ 1344 #ifdef INET6 1345 struct sockaddr_in6 *si6[2]; 1346 #endif /* INET6 */ 1347 struct sockaddr_storage sa[2]; 1348 int error, pf, dodrop; 1349 1350 dodrop = name[-1] == TCPCTL_DROP; 1351 if (dodrop) { 1352 if (oldp != NULL || *oldlenp != 0) 1353 return EINVAL; 1354 if (newp == NULL) 1355 return EPERM; 1356 if (newlen < sizeof(sa)) 1357 return ENOMEM; 1358 } 1359 if (namelen != 4 && namelen != 0) 1360 return EINVAL; 1361 if (name[-2] != IPPROTO_TCP) 1362 return EINVAL; 1363 pf = name[-3]; 1364 1365 /* old style lookup, ipv4 only */ 1366 if (namelen == 4) { 1367 #ifdef INET 1368 struct in_addr laddr, raddr; 1369 u_int lport, rport; 1370 1371 if (pf != PF_INET) 1372 return EPROTONOSUPPORT; 1373 raddr.s_addr = (uint32_t)name[0]; 1374 rport = (u_int)name[1]; 1375 laddr.s_addr = (uint32_t)name[2]; 1376 lport = (u_int)name[3]; 1377 1378 mutex_enter(softnet_lock); 1379 error = inet4_ident_core(raddr, rport, laddr, lport, 1380 oldp, oldlenp, l, dodrop); 1381 mutex_exit(softnet_lock); 1382 return error; 1383 #else /* INET */ 1384 return EINVAL; 1385 #endif /* INET */ 1386 } 1387 1388 if (newp == NULL || newlen != sizeof(sa)) 1389 return EINVAL; 1390 error = copyin(newp, &sa, newlen); 1391 if (error) 1392 return error; 1393 1394 /* 1395 * requested families must match 1396 */ 1397 if (pf != sa[0].ss_family || sa[0].ss_family != sa[1].ss_family) 1398 return EINVAL; 1399 1400 switch (pf) { 1401 #ifdef INET6 1402 case PF_INET6: 1403 si6[0] = (struct sockaddr_in6*)&sa[0]; 1404 si6[1] = (struct sockaddr_in6*)&sa[1]; 1405 if (si6[0]->sin6_len != sizeof(*si6[0]) || 1406 si6[1]->sin6_len != sizeof(*si6[1])) 1407 return EINVAL; 1408 1409 if (!IN6_IS_ADDR_V4MAPPED(&si6[0]->sin6_addr) && 1410 !IN6_IS_ADDR_V4MAPPED(&si6[1]->sin6_addr)) { 1411 error = sa6_embedscope(si6[0], ip6_use_defzone); 1412 if (error) 1413 return error; 1414 error = sa6_embedscope(si6[1], ip6_use_defzone); 1415 if (error) 1416 return error; 1417 1418 mutex_enter(softnet_lock); 1419 error = inet6_ident_core(&si6[0]->sin6_addr, 1420 si6[0]->sin6_port, &si6[1]->sin6_addr, 1421 si6[1]->sin6_port, oldp, oldlenp, l, dodrop); 1422 mutex_exit(softnet_lock); 1423 return error; 1424 } 1425 1426 if (IN6_IS_ADDR_V4MAPPED(&si6[0]->sin6_addr) != 1427 IN6_IS_ADDR_V4MAPPED(&si6[1]->sin6_addr)) 1428 return EINVAL; 1429 1430 in6_sin6_2_sin_in_sock((struct sockaddr *)&sa[0]); 1431 in6_sin6_2_sin_in_sock((struct sockaddr *)&sa[1]); 1432 /*FALLTHROUGH*/ 1433 #endif /* INET6 */ 1434 #ifdef INET 1435 case PF_INET: 1436 si4[0] = (struct sockaddr_in*)&sa[0]; 1437 si4[1] = (struct sockaddr_in*)&sa[1]; 1438 if (si4[0]->sin_len != sizeof(*si4[0]) || 1439 si4[0]->sin_len != sizeof(*si4[1])) 1440 return EINVAL; 1441 1442 mutex_enter(softnet_lock); 1443 error = inet4_ident_core(si4[0]->sin_addr, si4[0]->sin_port, 1444 si4[1]->sin_addr, si4[1]->sin_port, 1445 oldp, oldlenp, l, dodrop); 1446 mutex_exit(softnet_lock); 1447 return error; 1448 #endif /* INET */ 1449 default: 1450 return EPROTONOSUPPORT; 1451 } 1452 } 1453 1454 /* 1455 * sysctl helper for the inet and inet6 pcblists. handles tcp/udp and 1456 * inet/inet6, as well as raw pcbs for each. specifically not 1457 * declared static so that raw sockets and udp/udp6 can use it as 1458 * well. 1459 */ 1460 int 1461 sysctl_inpcblist(SYSCTLFN_ARGS) 1462 { 1463 #ifdef INET 1464 struct sockaddr_in *in; 1465 const struct inpcb *inp; 1466 #endif 1467 #ifdef INET6 1468 struct sockaddr_in6 *in6; 1469 const struct in6pcb *in6p; 1470 #endif 1471 struct inpcbtable *pcbtbl = __UNCONST(rnode->sysctl_data); 1472 const struct inpcb_hdr *inph; 1473 struct tcpcb *tp; 1474 struct kinfo_pcb pcb; 1475 char *dp; 1476 size_t len, needed, elem_size, out_size; 1477 int error, elem_count, pf, proto, pf2; 1478 1479 if (namelen != 4) 1480 return (EINVAL); 1481 1482 if (oldp != NULL) { 1483 len = *oldlenp; 1484 elem_size = name[2]; 1485 elem_count = name[3]; 1486 if (elem_size != sizeof(pcb)) 1487 return EINVAL; 1488 } else { 1489 len = 0; 1490 elem_count = INT_MAX; 1491 elem_size = sizeof(pcb); 1492 } 1493 error = 0; 1494 dp = oldp; 1495 out_size = elem_size; 1496 needed = 0; 1497 1498 if (namelen == 1 && name[0] == CTL_QUERY) 1499 return (sysctl_query(SYSCTLFN_CALL(rnode))); 1500 1501 if (name - oname != 4) 1502 return (EINVAL); 1503 1504 pf = oname[1]; 1505 proto = oname[2]; 1506 pf2 = (oldp != NULL) ? pf : 0; 1507 1508 mutex_enter(softnet_lock); 1509 1510 TAILQ_FOREACH(inph, &pcbtbl->inpt_queue, inph_queue) { 1511 #ifdef INET 1512 inp = (const struct inpcb *)inph; 1513 #endif 1514 #ifdef INET6 1515 in6p = (const struct in6pcb *)inph; 1516 #endif 1517 1518 if (inph->inph_af != pf) 1519 continue; 1520 1521 if (kauth_authorize_network(l->l_cred, KAUTH_NETWORK_SOCKET, 1522 KAUTH_REQ_NETWORK_SOCKET_CANSEE, inph->inph_socket, NULL, 1523 NULL) != 0) 1524 continue; 1525 1526 memset(&pcb, 0, sizeof(pcb)); 1527 1528 pcb.ki_family = pf; 1529 pcb.ki_type = proto; 1530 1531 switch (pf2) { 1532 case 0: 1533 /* just probing for size */ 1534 break; 1535 #ifdef INET 1536 case PF_INET: 1537 pcb.ki_family = inp->inp_socket->so_proto-> 1538 pr_domain->dom_family; 1539 pcb.ki_type = inp->inp_socket->so_proto-> 1540 pr_type; 1541 pcb.ki_protocol = inp->inp_socket->so_proto-> 1542 pr_protocol; 1543 pcb.ki_pflags = inp->inp_flags; 1544 1545 pcb.ki_sostate = inp->inp_socket->so_state; 1546 pcb.ki_prstate = inp->inp_state; 1547 if (proto == IPPROTO_TCP) { 1548 tp = intotcpcb(inp); 1549 pcb.ki_tstate = tp->t_state; 1550 pcb.ki_tflags = tp->t_flags; 1551 } 1552 1553 pcb.ki_pcbaddr = PTRTOUINT64(inp); 1554 pcb.ki_ppcbaddr = PTRTOUINT64(inp->inp_ppcb); 1555 pcb.ki_sockaddr = PTRTOUINT64(inp->inp_socket); 1556 1557 pcb.ki_rcvq = inp->inp_socket->so_rcv.sb_cc; 1558 pcb.ki_sndq = inp->inp_socket->so_snd.sb_cc; 1559 1560 in = satosin(&pcb.ki_src); 1561 in->sin_len = sizeof(*in); 1562 in->sin_family = pf; 1563 in->sin_port = inp->inp_lport; 1564 in->sin_addr = inp->inp_laddr; 1565 if (pcb.ki_prstate >= INP_CONNECTED) { 1566 in = satosin(&pcb.ki_dst); 1567 in->sin_len = sizeof(*in); 1568 in->sin_family = pf; 1569 in->sin_port = inp->inp_fport; 1570 in->sin_addr = inp->inp_faddr; 1571 } 1572 break; 1573 #endif 1574 #ifdef INET6 1575 case PF_INET6: 1576 pcb.ki_family = in6p->in6p_socket->so_proto-> 1577 pr_domain->dom_family; 1578 pcb.ki_type = in6p->in6p_socket->so_proto->pr_type; 1579 pcb.ki_protocol = in6p->in6p_socket->so_proto-> 1580 pr_protocol; 1581 pcb.ki_pflags = in6p->in6p_flags; 1582 1583 pcb.ki_sostate = in6p->in6p_socket->so_state; 1584 pcb.ki_prstate = in6p->in6p_state; 1585 if (proto == IPPROTO_TCP) { 1586 tp = in6totcpcb(in6p); 1587 pcb.ki_tstate = tp->t_state; 1588 pcb.ki_tflags = tp->t_flags; 1589 } 1590 1591 pcb.ki_pcbaddr = PTRTOUINT64(in6p); 1592 pcb.ki_ppcbaddr = PTRTOUINT64(in6p->in6p_ppcb); 1593 pcb.ki_sockaddr = PTRTOUINT64(in6p->in6p_socket); 1594 1595 pcb.ki_rcvq = in6p->in6p_socket->so_rcv.sb_cc; 1596 pcb.ki_sndq = in6p->in6p_socket->so_snd.sb_cc; 1597 1598 in6 = satosin6(&pcb.ki_src); 1599 in6->sin6_len = sizeof(*in6); 1600 in6->sin6_family = pf; 1601 in6->sin6_port = in6p->in6p_lport; 1602 in6->sin6_flowinfo = in6p->in6p_flowinfo; 1603 in6->sin6_addr = in6p->in6p_laddr; 1604 in6->sin6_scope_id = 0; /* XXX? */ 1605 1606 if (pcb.ki_prstate >= IN6P_CONNECTED) { 1607 in6 = satosin6(&pcb.ki_dst); 1608 in6->sin6_len = sizeof(*in6); 1609 in6->sin6_family = pf; 1610 in6->sin6_port = in6p->in6p_fport; 1611 in6->sin6_flowinfo = in6p->in6p_flowinfo; 1612 in6->sin6_addr = in6p->in6p_faddr; 1613 in6->sin6_scope_id = 0; /* XXX? */ 1614 } 1615 break; 1616 #endif 1617 } 1618 1619 if (len >= elem_size && elem_count > 0) { 1620 error = copyout(&pcb, dp, out_size); 1621 if (error) { 1622 mutex_exit(softnet_lock); 1623 return (error); 1624 } 1625 dp += elem_size; 1626 len -= elem_size; 1627 } 1628 needed += elem_size; 1629 if (elem_count > 0 && elem_count != INT_MAX) 1630 elem_count--; 1631 } 1632 1633 *oldlenp = needed; 1634 if (oldp == NULL) 1635 *oldlenp += PCB_SLOP * sizeof(struct kinfo_pcb); 1636 1637 mutex_exit(softnet_lock); 1638 1639 return (error); 1640 } 1641 1642 static int 1643 sysctl_tcp_congctl(SYSCTLFN_ARGS) 1644 { 1645 struct sysctlnode node; 1646 int error; 1647 char newname[TCPCC_MAXLEN]; 1648 1649 strlcpy(newname, tcp_congctl_global_name, sizeof(newname) - 1); 1650 1651 node = *rnode; 1652 node.sysctl_data = newname; 1653 node.sysctl_size = sizeof(newname); 1654 1655 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1656 1657 if (error || 1658 newp == NULL || 1659 strncmp(newname, tcp_congctl_global_name, sizeof(newname)) == 0) 1660 return error; 1661 1662 mutex_enter(softnet_lock); 1663 error = tcp_congctl_select(NULL, newname); 1664 mutex_exit(softnet_lock); 1665 1666 return error; 1667 } 1668 1669 static int 1670 sysctl_tcp_init_win(SYSCTLFN_ARGS) 1671 { 1672 int error; 1673 u_int iw; 1674 struct sysctlnode node; 1675 1676 iw = *(u_int *)rnode->sysctl_data; 1677 node = *rnode; 1678 node.sysctl_data = &iw; 1679 node.sysctl_size = sizeof(iw); 1680 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1681 if (error || newp == NULL) 1682 return error; 1683 1684 if (iw >= __arraycount(tcp_init_win_max)) 1685 return EINVAL; 1686 *(u_int *)rnode->sysctl_data = iw; 1687 return 0; 1688 } 1689 1690 static int 1691 sysctl_tcp_keep(SYSCTLFN_ARGS) 1692 { 1693 int error; 1694 u_int tmp; 1695 struct sysctlnode node; 1696 1697 node = *rnode; 1698 tmp = *(u_int *)rnode->sysctl_data; 1699 node.sysctl_data = &tmp; 1700 1701 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1702 if (error || newp == NULL) 1703 return error; 1704 1705 mutex_enter(softnet_lock); 1706 1707 *(u_int *)rnode->sysctl_data = tmp; 1708 tcp_tcpcb_template(); /* update the template */ 1709 1710 mutex_exit(softnet_lock); 1711 return 0; 1712 } 1713 1714 static int 1715 sysctl_net_inet_tcp_stats(SYSCTLFN_ARGS) 1716 { 1717 1718 return (NETSTAT_SYSCTL(tcpstat_percpu, TCP_NSTATS)); 1719 } 1720 1721 /* 1722 * this (second stage) setup routine is a replacement for tcp_sysctl() 1723 * (which is currently used for ipv4 and ipv6) 1724 */ 1725 static void 1726 sysctl_net_inet_tcp_setup2(struct sysctllog **clog, int pf, const char *pfname, 1727 const char *tcpname) 1728 { 1729 const struct sysctlnode *sack_node; 1730 const struct sysctlnode *abc_node; 1731 const struct sysctlnode *ecn_node; 1732 const struct sysctlnode *congctl_node; 1733 const struct sysctlnode *mslt_node; 1734 const struct sysctlnode *vtw_node; 1735 #ifdef TCP_DEBUG 1736 extern struct tcp_debug tcp_debug[TCP_NDEBUG]; 1737 extern int tcp_debx; 1738 #endif 1739 1740 sysctl_createv(clog, 0, NULL, NULL, 1741 CTLFLAG_PERMANENT, 1742 CTLTYPE_NODE, pfname, NULL, 1743 NULL, 0, NULL, 0, 1744 CTL_NET, pf, CTL_EOL); 1745 sysctl_createv(clog, 0, NULL, NULL, 1746 CTLFLAG_PERMANENT, 1747 CTLTYPE_NODE, tcpname, 1748 SYSCTL_DESCR("TCP related settings"), 1749 NULL, 0, NULL, 0, 1750 CTL_NET, pf, IPPROTO_TCP, CTL_EOL); 1751 1752 sysctl_createv(clog, 0, NULL, NULL, 1753 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1754 CTLTYPE_INT, "rfc1323", 1755 SYSCTL_DESCR("Enable RFC1323 TCP extensions"), 1756 sysctl_update_tcpcb_template, 0, &tcp_do_rfc1323, 0, 1757 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RFC1323, CTL_EOL); 1758 sysctl_createv(clog, 0, NULL, NULL, 1759 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1760 CTLTYPE_INT, "sendspace", 1761 SYSCTL_DESCR("Default TCP send buffer size"), 1762 NULL, 0, &tcp_sendspace, 0, 1763 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SENDSPACE, CTL_EOL); 1764 sysctl_createv(clog, 0, NULL, NULL, 1765 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1766 CTLTYPE_INT, "recvspace", 1767 SYSCTL_DESCR("Default TCP receive buffer size"), 1768 NULL, 0, &tcp_recvspace, 0, 1769 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RECVSPACE, CTL_EOL); 1770 sysctl_createv(clog, 0, NULL, NULL, 1771 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1772 CTLTYPE_INT, "mssdflt", 1773 SYSCTL_DESCR("Default maximum segment size"), 1774 sysctl_net_inet_tcp_mssdflt, 0, &tcp_mssdflt, 0, 1775 CTL_NET, pf, IPPROTO_TCP, TCPCTL_MSSDFLT, CTL_EOL); 1776 sysctl_createv(clog, 0, NULL, NULL, 1777 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1778 CTLTYPE_INT, "minmss", 1779 SYSCTL_DESCR("Lower limit for TCP maximum segment size"), 1780 NULL, 0, &tcp_minmss, 0, 1781 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1782 sysctl_createv(clog, 0, NULL, NULL, 1783 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1784 CTLTYPE_INT, "msl", 1785 SYSCTL_DESCR("Maximum Segment Life"), 1786 NULL, 0, &tcp_msl, 0, 1787 CTL_NET, pf, IPPROTO_TCP, TCPCTL_MSL, CTL_EOL); 1788 sysctl_createv(clog, 0, NULL, NULL, 1789 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1790 CTLTYPE_INT, "syn_cache_limit", 1791 SYSCTL_DESCR("Maximum number of entries in the TCP " 1792 "compressed state engine"), 1793 NULL, 0, &tcp_syn_cache_limit, 0, 1794 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_CACHE_LIMIT, 1795 CTL_EOL); 1796 sysctl_createv(clog, 0, NULL, NULL, 1797 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1798 CTLTYPE_INT, "syn_bucket_limit", 1799 SYSCTL_DESCR("Maximum number of entries per hash " 1800 "bucket in the TCP compressed state " 1801 "engine"), 1802 NULL, 0, &tcp_syn_bucket_limit, 0, 1803 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_BUCKET_LIMIT, 1804 CTL_EOL); 1805 #if 0 /* obsoleted */ 1806 sysctl_createv(clog, 0, NULL, NULL, 1807 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1808 CTLTYPE_INT, "syn_cache_interval", 1809 SYSCTL_DESCR("TCP compressed state engine's timer interval"), 1810 NULL, 0, &tcp_syn_cache_interval, 0, 1811 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_CACHE_INTER, 1812 CTL_EOL); 1813 #endif 1814 sysctl_createv(clog, 0, NULL, NULL, 1815 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1816 CTLTYPE_INT, "init_win", 1817 SYSCTL_DESCR("Initial TCP congestion window"), 1818 sysctl_tcp_init_win, 0, &tcp_init_win, 0, 1819 CTL_NET, pf, IPPROTO_TCP, TCPCTL_INIT_WIN, CTL_EOL); 1820 sysctl_createv(clog, 0, NULL, NULL, 1821 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1822 CTLTYPE_INT, "mss_ifmtu", 1823 SYSCTL_DESCR("Use interface MTU for calculating MSS"), 1824 NULL, 0, &tcp_mss_ifmtu, 0, 1825 CTL_NET, pf, IPPROTO_TCP, TCPCTL_MSS_IFMTU, CTL_EOL); 1826 sysctl_createv(clog, 0, NULL, &sack_node, 1827 CTLFLAG_PERMANENT, 1828 CTLTYPE_NODE, "sack", 1829 SYSCTL_DESCR("RFC2018 Selective ACKnowledgement tunables"), 1830 NULL, 0, NULL, 0, 1831 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_EOL); 1832 1833 /* Congctl subtree */ 1834 sysctl_createv(clog, 0, NULL, &congctl_node, 1835 CTLFLAG_PERMANENT, 1836 CTLTYPE_NODE, "congctl", 1837 SYSCTL_DESCR("TCP Congestion Control"), 1838 NULL, 0, NULL, 0, 1839 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1840 sysctl_createv(clog, 0, &congctl_node, NULL, 1841 CTLFLAG_PERMANENT, 1842 CTLTYPE_STRING, "available", 1843 SYSCTL_DESCR("Available Congestion Control Mechanisms"), 1844 NULL, 0, tcp_congctl_avail, 0, CTL_CREATE, CTL_EOL); 1845 sysctl_createv(clog, 0, &congctl_node, NULL, 1846 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1847 CTLTYPE_STRING, "selected", 1848 SYSCTL_DESCR("Selected Congestion Control Mechanism"), 1849 sysctl_tcp_congctl, 0, NULL, TCPCC_MAXLEN, 1850 CTL_CREATE, CTL_EOL); 1851 1852 sysctl_createv(clog, 0, NULL, NULL, 1853 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1854 CTLTYPE_INT, "win_scale", 1855 SYSCTL_DESCR("Use RFC1323 window scale options"), 1856 sysctl_update_tcpcb_template, 0, &tcp_do_win_scale, 0, 1857 CTL_NET, pf, IPPROTO_TCP, TCPCTL_WSCALE, CTL_EOL); 1858 sysctl_createv(clog, 0, NULL, NULL, 1859 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1860 CTLTYPE_INT, "timestamps", 1861 SYSCTL_DESCR("Use RFC1323 time stamp options"), 1862 sysctl_update_tcpcb_template, 0, &tcp_do_timestamps, 0, 1863 CTL_NET, pf, IPPROTO_TCP, TCPCTL_TSTAMP, CTL_EOL); 1864 sysctl_createv(clog, 0, NULL, NULL, 1865 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1866 CTLTYPE_INT, "compat_42", 1867 SYSCTL_DESCR("Enable workarounds for 4.2BSD TCP bugs"), 1868 NULL, 0, &tcp_compat_42, 0, 1869 CTL_NET, pf, IPPROTO_TCP, TCPCTL_COMPAT_42, CTL_EOL); 1870 sysctl_createv(clog, 0, NULL, NULL, 1871 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1872 CTLTYPE_INT, "cwm", 1873 SYSCTL_DESCR("Hughes/Touch/Heidemann Congestion Window " 1874 "Monitoring"), 1875 NULL, 0, &tcp_cwm, 0, 1876 CTL_NET, pf, IPPROTO_TCP, TCPCTL_CWM, CTL_EOL); 1877 sysctl_createv(clog, 0, NULL, NULL, 1878 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1879 CTLTYPE_INT, "cwm_burstsize", 1880 SYSCTL_DESCR("Congestion Window Monitoring allowed " 1881 "burst count in packets"), 1882 NULL, 0, &tcp_cwm_burstsize, 0, 1883 CTL_NET, pf, IPPROTO_TCP, TCPCTL_CWM_BURSTSIZE, 1884 CTL_EOL); 1885 sysctl_createv(clog, 0, NULL, NULL, 1886 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1887 CTLTYPE_INT, "ack_on_push", 1888 SYSCTL_DESCR("Immediately return ACK when PSH is " 1889 "received"), 1890 NULL, 0, &tcp_ack_on_push, 0, 1891 CTL_NET, pf, IPPROTO_TCP, TCPCTL_ACK_ON_PUSH, CTL_EOL); 1892 sysctl_createv(clog, 0, NULL, NULL, 1893 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1894 CTLTYPE_INT, "keepidle", 1895 SYSCTL_DESCR("Allowed connection idle ticks before a " 1896 "keepalive probe is sent"), 1897 sysctl_tcp_keep, 0, &tcp_keepidle, 0, 1898 CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPIDLE, CTL_EOL); 1899 sysctl_createv(clog, 0, NULL, NULL, 1900 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1901 CTLTYPE_INT, "keepintvl", 1902 SYSCTL_DESCR("Ticks before next keepalive probe is sent"), 1903 sysctl_tcp_keep, 0, &tcp_keepintvl, 0, 1904 CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPINTVL, CTL_EOL); 1905 sysctl_createv(clog, 0, NULL, NULL, 1906 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1907 CTLTYPE_INT, "keepcnt", 1908 SYSCTL_DESCR("Number of keepalive probes to send"), 1909 sysctl_tcp_keep, 0, &tcp_keepcnt, 0, 1910 CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPCNT, CTL_EOL); 1911 sysctl_createv(clog, 0, NULL, NULL, 1912 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 1913 CTLTYPE_INT, "slowhz", 1914 SYSCTL_DESCR("Keepalive ticks per second"), 1915 NULL, PR_SLOWHZ, NULL, 0, 1916 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SLOWHZ, CTL_EOL); 1917 sysctl_createv(clog, 0, NULL, NULL, 1918 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1919 CTLTYPE_INT, "log_refused", 1920 SYSCTL_DESCR("Log refused TCP connections"), 1921 NULL, 0, &tcp_log_refused, 0, 1922 CTL_NET, pf, IPPROTO_TCP, TCPCTL_LOG_REFUSED, CTL_EOL); 1923 #if 0 /* obsoleted */ 1924 sysctl_createv(clog, 0, NULL, NULL, 1925 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1926 CTLTYPE_INT, "rstratelimit", NULL, 1927 NULL, 0, &tcp_rst_ratelim, 0, 1928 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RSTRATELIMIT, CTL_EOL); 1929 #endif 1930 sysctl_createv(clog, 0, NULL, NULL, 1931 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1932 CTLTYPE_INT, "rstppslimit", 1933 SYSCTL_DESCR("Maximum number of RST packets to send " 1934 "per second"), 1935 NULL, 0, &tcp_rst_ppslim, 0, 1936 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RSTPPSLIMIT, CTL_EOL); 1937 sysctl_createv(clog, 0, NULL, NULL, 1938 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1939 CTLTYPE_INT, "delack_ticks", 1940 SYSCTL_DESCR("Number of ticks to delay sending an ACK"), 1941 NULL, 0, &tcp_delack_ticks, 0, 1942 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DELACK_TICKS, CTL_EOL); 1943 sysctl_createv(clog, 0, NULL, NULL, 1944 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1945 CTLTYPE_INT, "init_win_local", 1946 SYSCTL_DESCR("Initial TCP window size (in segments)"), 1947 sysctl_tcp_init_win, 0, &tcp_init_win_local, 0, 1948 CTL_NET, pf, IPPROTO_TCP, TCPCTL_INIT_WIN_LOCAL, 1949 CTL_EOL); 1950 sysctl_createv(clog, 0, NULL, NULL, 1951 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1952 CTLTYPE_STRUCT, "ident", 1953 SYSCTL_DESCR("RFC1413 Identification Protocol lookups"), 1954 sysctl_net_inet_tcp_ident, 0, NULL, sizeof(uid_t), 1955 CTL_NET, pf, IPPROTO_TCP, TCPCTL_IDENT, CTL_EOL); 1956 sysctl_createv(clog, 0, NULL, NULL, 1957 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1958 CTLTYPE_INT, "do_loopback_cksum", 1959 SYSCTL_DESCR("Perform TCP checksum on loopback"), 1960 NULL, 0, &tcp_do_loopback_cksum, 0, 1961 CTL_NET, pf, IPPROTO_TCP, TCPCTL_LOOPBACKCKSUM, 1962 CTL_EOL); 1963 sysctl_createv(clog, 0, NULL, NULL, 1964 CTLFLAG_PERMANENT, 1965 CTLTYPE_STRUCT, "pcblist", 1966 SYSCTL_DESCR("TCP protocol control block list"), 1967 sysctl_inpcblist, 0, &tcbtable, 0, 1968 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, 1969 CTL_EOL); 1970 sysctl_createv(clog, 0, NULL, NULL, 1971 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1972 CTLTYPE_INT, "keepinit", 1973 SYSCTL_DESCR("Ticks before initial tcp connection times out"), 1974 sysctl_tcp_keep, 0, &tcp_keepinit, 0, 1975 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1976 1977 /* TCP socket buffers auto-sizing nodes */ 1978 sysctl_createv(clog, 0, NULL, NULL, 1979 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1980 CTLTYPE_INT, "recvbuf_auto", 1981 SYSCTL_DESCR("Enable automatic receive " 1982 "buffer sizing (experimental)"), 1983 NULL, 0, &tcp_do_autorcvbuf, 0, 1984 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1985 sysctl_createv(clog, 0, NULL, NULL, 1986 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1987 CTLTYPE_INT, "recvbuf_inc", 1988 SYSCTL_DESCR("Incrementor step size of " 1989 "automatic receive buffer"), 1990 NULL, 0, &tcp_autorcvbuf_inc, 0, 1991 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1992 sysctl_createv(clog, 0, NULL, NULL, 1993 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1994 CTLTYPE_INT, "recvbuf_max", 1995 SYSCTL_DESCR("Max size of automatic receive buffer"), 1996 NULL, 0, &tcp_autorcvbuf_max, 0, 1997 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1998 1999 sysctl_createv(clog, 0, NULL, NULL, 2000 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2001 CTLTYPE_INT, "sendbuf_auto", 2002 SYSCTL_DESCR("Enable automatic send " 2003 "buffer sizing (experimental)"), 2004 NULL, 0, &tcp_do_autosndbuf, 0, 2005 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2006 sysctl_createv(clog, 0, NULL, NULL, 2007 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2008 CTLTYPE_INT, "sendbuf_inc", 2009 SYSCTL_DESCR("Incrementor step size of " 2010 "automatic send buffer"), 2011 NULL, 0, &tcp_autosndbuf_inc, 0, 2012 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2013 sysctl_createv(clog, 0, NULL, NULL, 2014 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2015 CTLTYPE_INT, "sendbuf_max", 2016 SYSCTL_DESCR("Max size of automatic send buffer"), 2017 NULL, 0, &tcp_autosndbuf_max, 0, 2018 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2019 2020 /* ECN subtree */ 2021 sysctl_createv(clog, 0, NULL, &ecn_node, 2022 CTLFLAG_PERMANENT, 2023 CTLTYPE_NODE, "ecn", 2024 SYSCTL_DESCR("RFC3168 Explicit Congestion Notification"), 2025 NULL, 0, NULL, 0, 2026 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2027 sysctl_createv(clog, 0, &ecn_node, NULL, 2028 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2029 CTLTYPE_INT, "enable", 2030 SYSCTL_DESCR("Enable TCP Explicit Congestion " 2031 "Notification"), 2032 NULL, 0, &tcp_do_ecn, 0, CTL_CREATE, CTL_EOL); 2033 sysctl_createv(clog, 0, &ecn_node, NULL, 2034 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2035 CTLTYPE_INT, "maxretries", 2036 SYSCTL_DESCR("Number of times to retry ECN setup " 2037 "before disabling ECN on the connection"), 2038 NULL, 0, &tcp_ecn_maxretries, 0, CTL_CREATE, CTL_EOL); 2039 2040 /* SACK gets it's own little subtree. */ 2041 sysctl_createv(clog, 0, NULL, &sack_node, 2042 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2043 CTLTYPE_INT, "enable", 2044 SYSCTL_DESCR("Enable RFC2018 Selective ACKnowledgement"), 2045 NULL, 0, &tcp_do_sack, 0, 2046 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 2047 sysctl_createv(clog, 0, NULL, &sack_node, 2048 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2049 CTLTYPE_INT, "maxholes", 2050 SYSCTL_DESCR("Maximum number of TCP SACK holes allowed per connection"), 2051 NULL, 0, &tcp_sack_tp_maxholes, 0, 2052 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 2053 sysctl_createv(clog, 0, NULL, &sack_node, 2054 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2055 CTLTYPE_INT, "globalmaxholes", 2056 SYSCTL_DESCR("Global maximum number of TCP SACK holes"), 2057 NULL, 0, &tcp_sack_globalmaxholes, 0, 2058 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 2059 sysctl_createv(clog, 0, NULL, &sack_node, 2060 CTLFLAG_PERMANENT, 2061 CTLTYPE_INT, "globalholes", 2062 SYSCTL_DESCR("Global number of TCP SACK holes"), 2063 NULL, 0, &tcp_sack_globalholes, 0, 2064 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 2065 2066 sysctl_createv(clog, 0, NULL, NULL, 2067 CTLFLAG_PERMANENT, 2068 CTLTYPE_STRUCT, "stats", 2069 SYSCTL_DESCR("TCP statistics"), 2070 sysctl_net_inet_tcp_stats, 0, NULL, 0, 2071 CTL_NET, pf, IPPROTO_TCP, TCPCTL_STATS, 2072 CTL_EOL); 2073 sysctl_createv(clog, 0, NULL, NULL, 2074 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2075 CTLTYPE_INT, "local_by_rtt", 2076 SYSCTL_DESCR("Use RTT estimator to decide which hosts " 2077 "are local"), 2078 NULL, 0, &tcp_rttlocal, 0, 2079 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2080 #ifdef TCP_DEBUG 2081 sysctl_createv(clog, 0, NULL, NULL, 2082 CTLFLAG_PERMANENT, 2083 CTLTYPE_STRUCT, "debug", 2084 SYSCTL_DESCR("TCP sockets debug information"), 2085 NULL, 0, &tcp_debug, sizeof(tcp_debug), 2086 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DEBUG, 2087 CTL_EOL); 2088 sysctl_createv(clog, 0, NULL, NULL, 2089 CTLFLAG_PERMANENT, 2090 CTLTYPE_INT, "debx", 2091 SYSCTL_DESCR("Number of TCP debug sockets messages"), 2092 NULL, 0, &tcp_debx, sizeof(tcp_debx), 2093 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DEBX, 2094 CTL_EOL); 2095 #endif 2096 sysctl_createv(clog, 0, NULL, NULL, 2097 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2098 CTLTYPE_STRUCT, "drop", 2099 SYSCTL_DESCR("TCP drop connection"), 2100 sysctl_net_inet_tcp_drop, 0, NULL, 0, 2101 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DROP, CTL_EOL); 2102 sysctl_createv(clog, 0, NULL, NULL, 2103 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2104 CTLTYPE_INT, "iss_hash", 2105 SYSCTL_DESCR("Enable RFC 1948 ISS by cryptographic " 2106 "hash computation"), 2107 NULL, 0, &tcp_do_rfc1948, sizeof(tcp_do_rfc1948), 2108 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, 2109 CTL_EOL); 2110 2111 /* ABC subtree */ 2112 2113 sysctl_createv(clog, 0, NULL, &abc_node, 2114 CTLFLAG_PERMANENT, CTLTYPE_NODE, "abc", 2115 SYSCTL_DESCR("RFC3465 Appropriate Byte Counting (ABC)"), 2116 NULL, 0, NULL, 0, 2117 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2118 sysctl_createv(clog, 0, &abc_node, NULL, 2119 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2120 CTLTYPE_INT, "enable", 2121 SYSCTL_DESCR("Enable RFC3465 Appropriate Byte Counting"), 2122 NULL, 0, &tcp_do_abc, 0, CTL_CREATE, CTL_EOL); 2123 sysctl_createv(clog, 0, &abc_node, NULL, 2124 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2125 CTLTYPE_INT, "aggressive", 2126 SYSCTL_DESCR("1: L=2*SMSS 0: L=1*SMSS"), 2127 NULL, 0, &tcp_abc_aggressive, 0, CTL_CREATE, CTL_EOL); 2128 2129 /* MSL tuning subtree */ 2130 2131 sysctl_createv(clog, 0, NULL, &mslt_node, 2132 CTLFLAG_PERMANENT, CTLTYPE_NODE, "mslt", 2133 SYSCTL_DESCR("MSL Tuning for TIME_WAIT truncation"), 2134 NULL, 0, NULL, 0, 2135 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2136 sysctl_createv(clog, 0, &mslt_node, NULL, 2137 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2138 CTLTYPE_INT, "enable", 2139 SYSCTL_DESCR("Enable TIME_WAIT truncation"), 2140 NULL, 0, &tcp_msl_enable, 0, CTL_CREATE, CTL_EOL); 2141 sysctl_createv(clog, 0, &mslt_node, NULL, 2142 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2143 CTLTYPE_INT, "loopback", 2144 SYSCTL_DESCR("MSL value to use for loopback connections"), 2145 NULL, 0, &tcp_msl_loop, 0, CTL_CREATE, CTL_EOL); 2146 sysctl_createv(clog, 0, &mslt_node, NULL, 2147 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2148 CTLTYPE_INT, "local", 2149 SYSCTL_DESCR("MSL value to use for local connections"), 2150 NULL, 0, &tcp_msl_local, 0, CTL_CREATE, CTL_EOL); 2151 sysctl_createv(clog, 0, &mslt_node, NULL, 2152 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2153 CTLTYPE_INT, "remote", 2154 SYSCTL_DESCR("MSL value to use for remote connections"), 2155 NULL, 0, &tcp_msl_remote, 0, CTL_CREATE, CTL_EOL); 2156 sysctl_createv(clog, 0, &mslt_node, NULL, 2157 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2158 CTLTYPE_INT, "remote_threshold", 2159 SYSCTL_DESCR("RTT estimate value to promote local to remote"), 2160 NULL, 0, &tcp_msl_remote_threshold, 0, CTL_CREATE, CTL_EOL); 2161 2162 /* vestigial TIME_WAIT tuning subtree */ 2163 2164 sysctl_createv(clog, 0, NULL, &vtw_node, 2165 CTLFLAG_PERMANENT, CTLTYPE_NODE, "vtw", 2166 SYSCTL_DESCR("Tuning for Vestigial TIME_WAIT"), 2167 NULL, 0, NULL, 0, 2168 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2169 sysctl_createv(clog, 0, &vtw_node, NULL, 2170 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2171 CTLTYPE_INT, "enable", 2172 SYSCTL_DESCR("Enable Vestigial TIME_WAIT"), 2173 sysctl_tcp_vtw_enable, 0, 2174 (pf == AF_INET) ? &tcp4_vtw_enable : &tcp6_vtw_enable, 2175 0, CTL_CREATE, CTL_EOL); 2176 sysctl_createv(clog, 0, &vtw_node, NULL, 2177 CTLFLAG_PERMANENT|CTLFLAG_READONLY, 2178 CTLTYPE_INT, "entries", 2179 SYSCTL_DESCR("Maximum number of vestigial TIME_WAIT entries"), 2180 NULL, 0, &tcp_vtw_entries, 0, CTL_CREATE, CTL_EOL); 2181 } 2182 2183 void 2184 tcp_usrreq_init(void) 2185 { 2186 2187 #ifdef INET 2188 sysctl_net_inet_tcp_setup2(NULL, PF_INET, "inet", "tcp"); 2189 #endif 2190 #ifdef INET6 2191 sysctl_net_inet_tcp_setup2(NULL, PF_INET6, "inet6", "tcp6"); 2192 #endif 2193 } 2194 2195 PR_WRAP_USRREQS(tcp) 2196 #define tcp_attach tcp_attach_wrapper 2197 #define tcp_detach tcp_detach_wrapper 2198 #define tcp_ioctl tcp_ioctl_wrapper 2199 #define tcp_stat tcp_stat_wrapper 2200 #define tcp_usrreq tcp_usrreq_wrapper 2201 2202 const struct pr_usrreqs tcp_usrreqs = { 2203 .pr_attach = tcp_attach, 2204 .pr_detach = tcp_detach, 2205 .pr_ioctl = tcp_ioctl, 2206 .pr_stat = tcp_stat, 2207 .pr_generic = tcp_usrreq, 2208 }; 2209
Indexes created Sun Sep 21 16:09:51 GMT 2025