1 /* $NetBSD: tcp_usrreq.c,v 1.150 2008/11/06 03:34:37 dyoung 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 #include <sys/cdefs.h> 98 __KERNEL_RCSID(0, "$NetBSD: tcp_usrreq.c,v 1.150 2008/11/06 03:34:37 dyoung Exp $"); 99 100 #include "opt_inet.h" 101 #include "opt_ipsec.h" 102 #include "opt_tcp_debug.h" 103 #include "opt_mbuftrace.h" 104 #include "rnd.h" 105 106 #include <sys/param.h> 107 #include <sys/systm.h> 108 #include <sys/kernel.h> 109 #include <sys/malloc.h> 110 #include <sys/mbuf.h> 111 #include <sys/socket.h> 112 #include <sys/socketvar.h> 113 #include <sys/protosw.h> 114 #include <sys/errno.h> 115 #include <sys/stat.h> 116 #include <sys/proc.h> 117 #include <sys/domain.h> 118 #include <sys/sysctl.h> 119 #include <sys/kauth.h> 120 #include <sys/uidinfo.h> 121 122 #include <net/if.h> 123 #include <net/route.h> 124 125 #include <netinet/in.h> 126 #include <netinet/in_systm.h> 127 #include <netinet/in_var.h> 128 #include <netinet/ip.h> 129 #include <netinet/in_pcb.h> 130 #include <netinet/ip_var.h> 131 #include <netinet/in_offload.h> 132 133 #ifdef INET6 134 #ifndef INET 135 #include <netinet/in.h> 136 #endif 137 #include <netinet/ip6.h> 138 #include <netinet6/in6_pcb.h> 139 #include <netinet6/ip6_var.h> 140 #include <netinet6/scope6_var.h> 141 #endif 142 143 #include <netinet/tcp.h> 144 #include <netinet/tcp_fsm.h> 145 #include <netinet/tcp_seq.h> 146 #include <netinet/tcp_timer.h> 147 #include <netinet/tcp_var.h> 148 #include <netinet/tcp_private.h> 149 #include <netinet/tcp_congctl.h> 150 #include <netinet/tcpip.h> 151 #include <netinet/tcp_debug.h> 152 153 #include "opt_tcp_space.h" 154 155 #ifdef IPSEC 156 #include <netinet6/ipsec.h> 157 #endif /*IPSEC*/ 158 159 /* 160 * TCP protocol interface to socket abstraction. 161 */ 162 163 /* 164 * Process a TCP user request for TCP tb. If this is a send request 165 * then m is the mbuf chain of send data. If this is a timer expiration 166 * (called from the software clock routine), then timertype tells which timer. 167 */ 168 /*ARGSUSED*/ 169 int 170 tcp_usrreq(struct socket *so, int req, 171 struct mbuf *m, struct mbuf *nam, struct mbuf *control, struct lwp *l) 172 { 173 struct inpcb *inp; 174 #ifdef INET6 175 struct in6pcb *in6p; 176 #endif 177 struct tcpcb *tp = NULL; 178 int s; 179 int error = 0; 180 #ifdef TCP_DEBUG 181 int ostate = 0; 182 #endif 183 int family; /* family of the socket */ 184 185 family = so->so_proto->pr_domain->dom_family; 186 187 if (req == PRU_CONTROL) { 188 switch (family) { 189 #ifdef INET 190 case PF_INET: 191 return (in_control(so, (long)m, (void *)nam, 192 (struct ifnet *)control, l)); 193 #endif 194 #ifdef INET6 195 case PF_INET6: 196 return (in6_control(so, (long)m, (void *)nam, 197 (struct ifnet *)control, l)); 198 #endif 199 default: 200 return EAFNOSUPPORT; 201 } 202 } 203 204 s = splsoftnet(); 205 206 if (req == PRU_PURGEIF) { 207 mutex_enter(softnet_lock); 208 switch (family) { 209 #ifdef INET 210 case PF_INET: 211 in_pcbpurgeif0(&tcbtable, (struct ifnet *)control); 212 in_purgeif((struct ifnet *)control); 213 in_pcbpurgeif(&tcbtable, (struct ifnet *)control); 214 break; 215 #endif 216 #ifdef INET6 217 case PF_INET6: 218 in6_pcbpurgeif0(&tcbtable, (struct ifnet *)control); 219 in6_purgeif((struct ifnet *)control); 220 in6_pcbpurgeif(&tcbtable, (struct ifnet *)control); 221 break; 222 #endif 223 default: 224 mutex_exit(softnet_lock); 225 splx(s); 226 return (EAFNOSUPPORT); 227 } 228 mutex_exit(softnet_lock); 229 splx(s); 230 return (0); 231 } 232 233 if (req == PRU_ATTACH) 234 sosetlock(so); 235 236 switch (family) { 237 #ifdef INET 238 case PF_INET: 239 inp = sotoinpcb(so); 240 #ifdef INET6 241 in6p = NULL; 242 #endif 243 break; 244 #endif 245 #ifdef INET6 246 case PF_INET6: 247 inp = NULL; 248 in6p = sotoin6pcb(so); 249 break; 250 #endif 251 default: 252 splx(s); 253 return EAFNOSUPPORT; 254 } 255 256 #ifdef DIAGNOSTIC 257 #ifdef INET6 258 if (inp && in6p) 259 panic("tcp_usrreq: both inp and in6p set to non-NULL"); 260 #endif 261 if (req != PRU_SEND && req != PRU_SENDOOB && control) 262 panic("tcp_usrreq: unexpected control mbuf"); 263 #endif 264 /* 265 * When a TCP is attached to a socket, then there will be 266 * a (struct inpcb) pointed at by the socket, and this 267 * structure will point at a subsidary (struct tcpcb). 268 */ 269 #ifndef INET6 270 if (inp == 0 && req != PRU_ATTACH) 271 #else 272 if ((inp == 0 && in6p == 0) && req != PRU_ATTACH) 273 #endif 274 { 275 error = EINVAL; 276 goto release; 277 } 278 #ifdef INET 279 if (inp) { 280 tp = intotcpcb(inp); 281 /* WHAT IF TP IS 0? */ 282 #ifdef KPROF 283 tcp_acounts[tp->t_state][req]++; 284 #endif 285 #ifdef TCP_DEBUG 286 ostate = tp->t_state; 287 #endif 288 } 289 #endif 290 #ifdef INET6 291 if (in6p) { 292 tp = in6totcpcb(in6p); 293 /* WHAT IF TP IS 0? */ 294 #ifdef KPROF 295 tcp_acounts[tp->t_state][req]++; 296 #endif 297 #ifdef TCP_DEBUG 298 ostate = tp->t_state; 299 #endif 300 } 301 #endif 302 303 switch (req) { 304 305 /* 306 * TCP attaches to socket via PRU_ATTACH, reserving space, 307 * and an internet control block. 308 */ 309 case PRU_ATTACH: 310 #ifndef INET6 311 if (inp != 0) 312 #else 313 if (inp != 0 || in6p != 0) 314 #endif 315 { 316 error = EISCONN; 317 break; 318 } 319 error = tcp_attach(so); 320 if (error) 321 break; 322 if ((so->so_options & SO_LINGER) && so->so_linger == 0) 323 so->so_linger = TCP_LINGERTIME; 324 tp = sototcpcb(so); 325 break; 326 327 /* 328 * PRU_DETACH detaches the TCP protocol from the socket. 329 */ 330 case PRU_DETACH: 331 tp = tcp_disconnect(tp); 332 break; 333 334 /* 335 * Give the socket an address. 336 */ 337 case PRU_BIND: 338 switch (family) { 339 #ifdef INET 340 case PF_INET: 341 error = in_pcbbind(inp, nam, l); 342 break; 343 #endif 344 #ifdef INET6 345 case PF_INET6: 346 error = in6_pcbbind(in6p, nam, l); 347 if (!error) { 348 /* mapped addr case */ 349 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 350 tp->t_family = AF_INET; 351 else 352 tp->t_family = AF_INET6; 353 } 354 break; 355 #endif 356 } 357 break; 358 359 /* 360 * Prepare to accept connections. 361 */ 362 case PRU_LISTEN: 363 #ifdef INET 364 if (inp && inp->inp_lport == 0) { 365 error = in_pcbbind(inp, NULL, l); 366 if (error) 367 break; 368 } 369 #endif 370 #ifdef INET6 371 if (in6p && in6p->in6p_lport == 0) { 372 error = in6_pcbbind(in6p, NULL, NULL); 373 if (error) 374 break; 375 } 376 #endif 377 tp->t_state = TCPS_LISTEN; 378 break; 379 380 /* 381 * Initiate connection to peer. 382 * Create a template for use in transmissions on this connection. 383 * Enter SYN_SENT state, and mark socket as connecting. 384 * Start keep-alive timer, and seed output sequence space. 385 * Send initial segment on connection. 386 */ 387 case PRU_CONNECT: 388 #ifdef INET 389 if (inp) { 390 if (inp->inp_lport == 0) { 391 error = in_pcbbind(inp, NULL, l); 392 if (error) 393 break; 394 } 395 error = in_pcbconnect(inp, nam, l); 396 } 397 #endif 398 #ifdef INET6 399 if (in6p) { 400 if (in6p->in6p_lport == 0) { 401 error = in6_pcbbind(in6p, NULL, NULL); 402 if (error) 403 break; 404 } 405 error = in6_pcbconnect(in6p, nam, l); 406 if (!error) { 407 /* mapped addr case */ 408 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) 409 tp->t_family = AF_INET; 410 else 411 tp->t_family = AF_INET6; 412 } 413 } 414 #endif 415 if (error) 416 break; 417 tp->t_template = tcp_template(tp); 418 if (tp->t_template == 0) { 419 #ifdef INET 420 if (inp) 421 in_pcbdisconnect(inp); 422 #endif 423 #ifdef INET6 424 if (in6p) 425 in6_pcbdisconnect(in6p); 426 #endif 427 error = ENOBUFS; 428 break; 429 } 430 /* 431 * Compute window scaling to request. 432 * XXX: This should be moved to tcp_output(). 433 */ 434 while (tp->request_r_scale < TCP_MAX_WINSHIFT && 435 (TCP_MAXWIN << tp->request_r_scale) < sb_max) 436 tp->request_r_scale++; 437 soisconnecting(so); 438 TCP_STATINC(TCP_STAT_CONNATTEMPT); 439 tp->t_state = TCPS_SYN_SENT; 440 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepinit); 441 tp->iss = tcp_new_iss(tp, 0); 442 tcp_sendseqinit(tp); 443 error = tcp_output(tp); 444 break; 445 446 /* 447 * Create a TCP connection between two sockets. 448 */ 449 case PRU_CONNECT2: 450 error = EOPNOTSUPP; 451 break; 452 453 /* 454 * Initiate disconnect from peer. 455 * If connection never passed embryonic stage, just drop; 456 * else if don't need to let data drain, then can just drop anyways, 457 * else have to begin TCP shutdown process: mark socket disconnecting, 458 * drain unread data, state switch to reflect user close, and 459 * send segment (e.g. FIN) to peer. Socket will be really disconnected 460 * when peer sends FIN and acks ours. 461 * 462 * SHOULD IMPLEMENT LATER PRU_CONNECT VIA REALLOC TCPCB. 463 */ 464 case PRU_DISCONNECT: 465 tp = tcp_disconnect(tp); 466 break; 467 468 /* 469 * Accept a connection. Essentially all the work is 470 * done at higher levels; just return the address 471 * of the peer, storing through addr. 472 */ 473 case PRU_ACCEPT: 474 #ifdef INET 475 if (inp) 476 in_setpeeraddr(inp, nam); 477 #endif 478 #ifdef INET6 479 if (in6p) 480 in6_setpeeraddr(in6p, nam); 481 #endif 482 break; 483 484 /* 485 * Mark the connection as being incapable of further output. 486 */ 487 case PRU_SHUTDOWN: 488 socantsendmore(so); 489 tp = tcp_usrclosed(tp); 490 if (tp) 491 error = tcp_output(tp); 492 break; 493 494 /* 495 * After a receive, possibly send window update to peer. 496 */ 497 case PRU_RCVD: 498 /* 499 * soreceive() calls this function when a user receives 500 * ancillary data on a listening socket. We don't call 501 * tcp_output in such a case, since there is no header 502 * template for a listening socket and hence the kernel 503 * will panic. 504 */ 505 if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) != 0) 506 (void) tcp_output(tp); 507 break; 508 509 /* 510 * Do a send by putting data in output queue and updating urgent 511 * marker if URG set. Possibly send more data. 512 */ 513 case PRU_SEND: 514 if (control && control->m_len) { 515 m_freem(control); 516 m_freem(m); 517 error = EINVAL; 518 break; 519 } 520 sbappendstream(&so->so_snd, m); 521 error = tcp_output(tp); 522 break; 523 524 /* 525 * Abort the TCP. 526 */ 527 case PRU_ABORT: 528 tp = tcp_drop(tp, ECONNABORTED); 529 break; 530 531 case PRU_SENSE: 532 /* 533 * stat: don't bother with a blocksize. 534 */ 535 splx(s); 536 return (0); 537 538 case PRU_RCVOOB: 539 if (control && control->m_len) { 540 m_freem(control); 541 m_freem(m); 542 error = EINVAL; 543 break; 544 } 545 if ((so->so_oobmark == 0 && 546 (so->so_state & SS_RCVATMARK) == 0) || 547 so->so_options & SO_OOBINLINE || 548 tp->t_oobflags & TCPOOB_HADDATA) { 549 error = EINVAL; 550 break; 551 } 552 if ((tp->t_oobflags & TCPOOB_HAVEDATA) == 0) { 553 error = EWOULDBLOCK; 554 break; 555 } 556 m->m_len = 1; 557 *mtod(m, char *) = tp->t_iobc; 558 if (((long)nam & MSG_PEEK) == 0) 559 tp->t_oobflags ^= (TCPOOB_HAVEDATA | TCPOOB_HADDATA); 560 break; 561 562 case PRU_SENDOOB: 563 if (sbspace(&so->so_snd) < -512) { 564 m_freem(m); 565 error = ENOBUFS; 566 break; 567 } 568 /* 569 * According to RFC961 (Assigned Protocols), 570 * the urgent pointer points to the last octet 571 * of urgent data. We continue, however, 572 * to consider it to indicate the first octet 573 * of data past the urgent section. 574 * Otherwise, snd_up should be one lower. 575 */ 576 sbappendstream(&so->so_snd, m); 577 tp->snd_up = tp->snd_una + so->so_snd.sb_cc; 578 tp->t_force = 1; 579 error = tcp_output(tp); 580 tp->t_force = 0; 581 break; 582 583 case PRU_SOCKADDR: 584 #ifdef INET 585 if (inp) 586 in_setsockaddr(inp, nam); 587 #endif 588 #ifdef INET6 589 if (in6p) 590 in6_setsockaddr(in6p, nam); 591 #endif 592 break; 593 594 case PRU_PEERADDR: 595 #ifdef INET 596 if (inp) 597 in_setpeeraddr(inp, nam); 598 #endif 599 #ifdef INET6 600 if (in6p) 601 in6_setpeeraddr(in6p, nam); 602 #endif 603 break; 604 605 default: 606 panic("tcp_usrreq"); 607 } 608 #ifdef TCP_DEBUG 609 if (tp && (so->so_options & SO_DEBUG)) 610 tcp_trace(TA_USER, ostate, tp, NULL, req); 611 #endif 612 613 release: 614 splx(s); 615 return (error); 616 } 617 618 static void 619 change_keepalive(struct socket *so, struct tcpcb *tp) 620 { 621 tp->t_maxidle = tp->t_keepcnt * tp->t_keepintvl; 622 TCP_TIMER_DISARM(tp, TCPT_KEEP); 623 TCP_TIMER_DISARM(tp, TCPT_2MSL); 624 625 if (tp->t_state == TCPS_SYN_RECEIVED || 626 tp->t_state == TCPS_SYN_SENT) { 627 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepinit); 628 } else if (so->so_options & SO_KEEPALIVE && 629 tp->t_state <= TCPS_CLOSE_WAIT) { 630 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepintvl); 631 } else { 632 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepidle); 633 } 634 635 if ((tp->t_state == TCPS_FIN_WAIT_2) && (tp->t_maxidle > 0)) 636 TCP_TIMER_ARM(tp, TCPT_2MSL, tp->t_maxidle); 637 } 638 639 640 int 641 tcp_ctloutput(int op, struct socket *so, struct sockopt *sopt) 642 { 643 int error = 0, s; 644 struct inpcb *inp; 645 #ifdef INET6 646 struct in6pcb *in6p; 647 #endif 648 struct tcpcb *tp; 649 u_int ui; 650 int family; /* family of the socket */ 651 int level, optname, optval; 652 653 level = sopt->sopt_level; 654 optname = sopt->sopt_name; 655 656 family = so->so_proto->pr_domain->dom_family; 657 658 s = splsoftnet(); 659 switch (family) { 660 #ifdef INET 661 case PF_INET: 662 inp = sotoinpcb(so); 663 #ifdef INET6 664 in6p = NULL; 665 #endif 666 break; 667 #endif 668 #ifdef INET6 669 case PF_INET6: 670 inp = NULL; 671 in6p = sotoin6pcb(so); 672 break; 673 #endif 674 default: 675 splx(s); 676 panic("%s: af %d", __func__, family); 677 } 678 #ifndef INET6 679 if (inp == NULL) 680 #else 681 if (inp == NULL && in6p == NULL) 682 #endif 683 { 684 splx(s); 685 return (ECONNRESET); 686 } 687 if (level != IPPROTO_TCP) { 688 switch (family) { 689 #ifdef INET 690 case PF_INET: 691 error = ip_ctloutput(op, so, sopt); 692 break; 693 #endif 694 #ifdef INET6 695 case PF_INET6: 696 error = ip6_ctloutput(op, so, sopt); 697 break; 698 #endif 699 } 700 splx(s); 701 return (error); 702 } 703 if (inp) 704 tp = intotcpcb(inp); 705 #ifdef INET6 706 else if (in6p) 707 tp = in6totcpcb(in6p); 708 #endif 709 else 710 tp = NULL; 711 712 switch (op) { 713 case PRCO_SETOPT: 714 switch (optname) { 715 #ifdef TCP_SIGNATURE 716 case TCP_MD5SIG: 717 error = sockopt_getint(sopt, &optval); 718 if (error) 719 break; 720 if (optval > 0) 721 tp->t_flags |= TF_SIGNATURE; 722 else 723 tp->t_flags &= ~TF_SIGNATURE; 724 break; 725 #endif /* TCP_SIGNATURE */ 726 727 case TCP_NODELAY: 728 error = sockopt_getint(sopt, &optval); 729 if (error) 730 break; 731 if (optval) 732 tp->t_flags |= TF_NODELAY; 733 else 734 tp->t_flags &= ~TF_NODELAY; 735 break; 736 737 case TCP_MAXSEG: 738 error = sockopt_getint(sopt, &optval); 739 if (error) 740 break; 741 if (optval > 0 && optval <= tp->t_peermss) 742 tp->t_peermss = optval; /* limit on send size */ 743 else 744 error = EINVAL; 745 break; 746 #ifdef notyet 747 case TCP_CONGCTL: 748 /* XXX string overflow XXX */ 749 error = tcp_congctl_select(tp, sopt->sopt_data); 750 break; 751 #endif 752 753 case TCP_KEEPIDLE: 754 error = sockopt_get(sopt, &ui, sizeof(ui)); 755 if (error) 756 break; 757 if (ui > 0) { 758 tp->t_keepidle = ui; 759 change_keepalive(so, tp); 760 } else 761 error = EINVAL; 762 break; 763 764 case TCP_KEEPINTVL: 765 error = sockopt_get(sopt, &ui, sizeof(ui)); 766 if (error) 767 break; 768 if (ui > 0) { 769 tp->t_keepintvl = ui; 770 change_keepalive(so, tp); 771 } else 772 error = EINVAL; 773 break; 774 775 case TCP_KEEPCNT: 776 error = sockopt_get(sopt, &ui, sizeof(ui)); 777 if (error) 778 break; 779 if (ui > 0) { 780 tp->t_keepcnt = ui; 781 change_keepalive(so, tp); 782 } else 783 error = EINVAL; 784 break; 785 786 case TCP_KEEPINIT: 787 error = sockopt_get(sopt, &ui, sizeof(ui)); 788 if (error) 789 break; 790 if (ui > 0) { 791 tp->t_keepinit = ui; 792 change_keepalive(so, tp); 793 } else 794 error = EINVAL; 795 break; 796 797 default: 798 error = ENOPROTOOPT; 799 break; 800 } 801 break; 802 803 case PRCO_GETOPT: 804 switch (optname) { 805 #ifdef TCP_SIGNATURE 806 case TCP_MD5SIG: 807 optval = (tp->t_flags & TF_SIGNATURE) ? 1 : 0; 808 error = sockopt_set(sopt, &optval, sizeof(optval)); 809 break; 810 #endif 811 case TCP_NODELAY: 812 optval = tp->t_flags & TF_NODELAY; 813 error = sockopt_set(sopt, &optval, sizeof(optval)); 814 break; 815 case TCP_MAXSEG: 816 optval = tp->t_peermss; 817 error = sockopt_set(sopt, &optval, sizeof(optval)); 818 break; 819 #ifdef notyet 820 case TCP_CONGCTL: 821 break; 822 #endif 823 default: 824 error = ENOPROTOOPT; 825 break; 826 } 827 break; 828 } 829 splx(s); 830 return (error); 831 } 832 833 #ifndef TCP_SENDSPACE 834 #define TCP_SENDSPACE 1024*32 835 #endif 836 int tcp_sendspace = TCP_SENDSPACE; 837 #ifndef TCP_RECVSPACE 838 #define TCP_RECVSPACE 1024*32 839 #endif 840 int tcp_recvspace = TCP_RECVSPACE; 841 842 /* 843 * Attach TCP protocol to socket, allocating 844 * internet protocol control block, tcp control block, 845 * bufer space, and entering LISTEN state if to accept connections. 846 */ 847 int 848 tcp_attach(struct socket *so) 849 { 850 struct tcpcb *tp; 851 struct inpcb *inp; 852 #ifdef INET6 853 struct in6pcb *in6p; 854 #endif 855 int error; 856 int family; /* family of the socket */ 857 858 family = so->so_proto->pr_domain->dom_family; 859 860 #ifdef MBUFTRACE 861 so->so_mowner = &tcp_sock_mowner; 862 so->so_rcv.sb_mowner = &tcp_sock_rx_mowner; 863 so->so_snd.sb_mowner = &tcp_sock_tx_mowner; 864 #endif 865 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 866 error = soreserve(so, tcp_sendspace, tcp_recvspace); 867 if (error) 868 return (error); 869 } 870 871 so->so_rcv.sb_flags |= SB_AUTOSIZE; 872 so->so_snd.sb_flags |= SB_AUTOSIZE; 873 874 switch (family) { 875 #ifdef INET 876 case PF_INET: 877 error = in_pcballoc(so, &tcbtable); 878 if (error) 879 return (error); 880 inp = sotoinpcb(so); 881 #ifdef INET6 882 in6p = NULL; 883 #endif 884 break; 885 #endif 886 #ifdef INET6 887 case PF_INET6: 888 error = in6_pcballoc(so, &tcbtable); 889 if (error) 890 return (error); 891 inp = NULL; 892 in6p = sotoin6pcb(so); 893 break; 894 #endif 895 default: 896 return EAFNOSUPPORT; 897 } 898 if (inp) 899 tp = tcp_newtcpcb(family, (void *)inp); 900 #ifdef INET6 901 else if (in6p) 902 tp = tcp_newtcpcb(family, (void *)in6p); 903 #endif 904 else 905 tp = NULL; 906 907 if (tp == 0) { 908 int nofd = so->so_state & SS_NOFDREF; /* XXX */ 909 910 so->so_state &= ~SS_NOFDREF; /* don't free the socket yet */ 911 #ifdef INET 912 if (inp) 913 in_pcbdetach(inp); 914 #endif 915 #ifdef INET6 916 if (in6p) 917 in6_pcbdetach(in6p); 918 #endif 919 so->so_state |= nofd; 920 return (ENOBUFS); 921 } 922 tp->t_state = TCPS_CLOSED; 923 return (0); 924 } 925 926 /* 927 * Initiate (or continue) disconnect. 928 * If embryonic state, just send reset (once). 929 * If in ``let data drain'' option and linger null, just drop. 930 * Otherwise (hard), mark socket disconnecting and drop 931 * current input data; switch states based on user close, and 932 * send segment to peer (with FIN). 933 */ 934 struct tcpcb * 935 tcp_disconnect(struct tcpcb *tp) 936 { 937 struct socket *so; 938 939 if (tp->t_inpcb) 940 so = tp->t_inpcb->inp_socket; 941 #ifdef INET6 942 else if (tp->t_in6pcb) 943 so = tp->t_in6pcb->in6p_socket; 944 #endif 945 else 946 so = NULL; 947 948 if (TCPS_HAVEESTABLISHED(tp->t_state) == 0) 949 tp = tcp_close(tp); 950 else if ((so->so_options & SO_LINGER) && so->so_linger == 0) 951 tp = tcp_drop(tp, 0); 952 else { 953 soisdisconnecting(so); 954 sbflush(&so->so_rcv); 955 tp = tcp_usrclosed(tp); 956 if (tp) 957 (void) tcp_output(tp); 958 } 959 return (tp); 960 } 961 962 /* 963 * User issued close, and wish to trail through shutdown states: 964 * if never received SYN, just forget it. If got a SYN from peer, 965 * but haven't sent FIN, then go to FIN_WAIT_1 state to send peer a FIN. 966 * If already got a FIN from peer, then almost done; go to LAST_ACK 967 * state. In all other cases, have already sent FIN to peer (e.g. 968 * after PRU_SHUTDOWN), and just have to play tedious game waiting 969 * for peer to send FIN or not respond to keep-alives, etc. 970 * We can let the user exit from the close as soon as the FIN is acked. 971 */ 972 struct tcpcb * 973 tcp_usrclosed(struct tcpcb *tp) 974 { 975 976 switch (tp->t_state) { 977 978 case TCPS_CLOSED: 979 case TCPS_LISTEN: 980 case TCPS_SYN_SENT: 981 tp->t_state = TCPS_CLOSED; 982 tp = tcp_close(tp); 983 break; 984 985 case TCPS_SYN_RECEIVED: 986 case TCPS_ESTABLISHED: 987 tp->t_state = TCPS_FIN_WAIT_1; 988 break; 989 990 case TCPS_CLOSE_WAIT: 991 tp->t_state = TCPS_LAST_ACK; 992 break; 993 } 994 if (tp && tp->t_state >= TCPS_FIN_WAIT_2) { 995 struct socket *so; 996 if (tp->t_inpcb) 997 so = tp->t_inpcb->inp_socket; 998 #ifdef INET6 999 else if (tp->t_in6pcb) 1000 so = tp->t_in6pcb->in6p_socket; 1001 #endif 1002 else 1003 so = NULL; 1004 if (so) 1005 soisdisconnected(so); 1006 /* 1007 * If we are in FIN_WAIT_2, we arrived here because the 1008 * application did a shutdown of the send side. Like the 1009 * case of a transition from FIN_WAIT_1 to FIN_WAIT_2 after 1010 * a full close, we start a timer to make sure sockets are 1011 * not left in FIN_WAIT_2 forever. 1012 */ 1013 if ((tp->t_state == TCPS_FIN_WAIT_2) && (tp->t_maxidle > 0)) 1014 TCP_TIMER_ARM(tp, TCPT_2MSL, tp->t_maxidle); 1015 } 1016 return (tp); 1017 } 1018 1019 /* 1020 * sysctl helper routine for net.inet.ip.mssdflt. it can't be less 1021 * than 32. 1022 */ 1023 static int 1024 sysctl_net_inet_tcp_mssdflt(SYSCTLFN_ARGS) 1025 { 1026 int error, mssdflt; 1027 struct sysctlnode node; 1028 1029 mssdflt = tcp_mssdflt; 1030 node = *rnode; 1031 node.sysctl_data = &mssdflt; 1032 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1033 if (error || newp == NULL) 1034 return (error); 1035 1036 if (mssdflt < 32) 1037 return (EINVAL); 1038 tcp_mssdflt = mssdflt; 1039 1040 return (0); 1041 } 1042 1043 /* 1044 * sysctl helper routine for setting port related values under 1045 * net.inet.ip and net.inet6.ip6. does basic range checking and does 1046 * additional checks for each type. this code has placed in 1047 * tcp_input.c since INET and INET6 both use the same tcp code. 1048 * 1049 * this helper is not static so that both inet and inet6 can use it. 1050 */ 1051 int 1052 sysctl_net_inet_ip_ports(SYSCTLFN_ARGS) 1053 { 1054 int error, tmp; 1055 int apmin, apmax; 1056 #ifndef IPNOPRIVPORTS 1057 int lpmin, lpmax; 1058 #endif /* IPNOPRIVPORTS */ 1059 struct sysctlnode node; 1060 1061 if (namelen != 0) 1062 return (EINVAL); 1063 1064 switch (name[-3]) { 1065 #ifdef INET 1066 case PF_INET: 1067 apmin = anonportmin; 1068 apmax = anonportmax; 1069 #ifndef IPNOPRIVPORTS 1070 lpmin = lowportmin; 1071 lpmax = lowportmax; 1072 #endif /* IPNOPRIVPORTS */ 1073 break; 1074 #endif /* INET */ 1075 #ifdef INET6 1076 case PF_INET6: 1077 apmin = ip6_anonportmin; 1078 apmax = ip6_anonportmax; 1079 #ifndef IPNOPRIVPORTS 1080 lpmin = ip6_lowportmin; 1081 lpmax = ip6_lowportmax; 1082 #endif /* IPNOPRIVPORTS */ 1083 break; 1084 #endif /* INET6 */ 1085 default: 1086 return (EINVAL); 1087 } 1088 1089 /* 1090 * insert temporary copy into node, perform lookup on 1091 * temporary, then restore pointer 1092 */ 1093 node = *rnode; 1094 tmp = *(int*)rnode->sysctl_data; 1095 node.sysctl_data = &tmp; 1096 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1097 if (error || newp == NULL) 1098 return (error); 1099 1100 /* 1101 * simple port range check 1102 */ 1103 if (tmp < 0 || tmp > 65535) 1104 return (EINVAL); 1105 1106 /* 1107 * per-node range checks 1108 */ 1109 switch (rnode->sysctl_num) { 1110 case IPCTL_ANONPORTMIN: 1111 if (tmp >= apmax) 1112 return (EINVAL); 1113 #ifndef IPNOPRIVPORTS 1114 if (tmp < IPPORT_RESERVED) 1115 return (EINVAL); 1116 #endif /* IPNOPRIVPORTS */ 1117 break; 1118 1119 case IPCTL_ANONPORTMAX: 1120 if (apmin >= tmp) 1121 return (EINVAL); 1122 #ifndef IPNOPRIVPORTS 1123 if (tmp < IPPORT_RESERVED) 1124 return (EINVAL); 1125 #endif /* IPNOPRIVPORTS */ 1126 break; 1127 1128 #ifndef IPNOPRIVPORTS 1129 case IPCTL_LOWPORTMIN: 1130 if (tmp >= lpmax || 1131 tmp > IPPORT_RESERVEDMAX || 1132 tmp < IPPORT_RESERVEDMIN) 1133 return (EINVAL); 1134 break; 1135 1136 case IPCTL_LOWPORTMAX: 1137 if (lpmin >= tmp || 1138 tmp > IPPORT_RESERVEDMAX || 1139 tmp < IPPORT_RESERVEDMIN) 1140 return (EINVAL); 1141 break; 1142 #endif /* IPNOPRIVPORTS */ 1143 1144 default: 1145 return (EINVAL); 1146 } 1147 1148 *(int*)rnode->sysctl_data = tmp; 1149 1150 return (0); 1151 } 1152 1153 /* 1154 * The superuser can drop any connection. Normal users can only drop 1155 * their own connections. 1156 */ 1157 static inline int 1158 check_sockuid(struct socket *sockp, kauth_cred_t cred) 1159 { 1160 uid_t sockuid; 1161 1162 sockuid = sockp->so_uidinfo->ui_uid; 1163 if (kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, NULL) == 0 || 1164 sockuid == kauth_cred_getuid(cred) || 1165 sockuid == kauth_cred_geteuid(cred)) 1166 return 0; 1167 return EACCES; 1168 } 1169 1170 static inline int 1171 copyout_uid(struct socket *sockp, void *oldp, size_t *oldlenp) 1172 { 1173 size_t sz; 1174 int error; 1175 uid_t uid; 1176 1177 uid = sockp->so_uidinfo->ui_uid; 1178 if (oldp) { 1179 sz = MIN(sizeof(uid), *oldlenp); 1180 error = copyout(&uid, oldp, sz); 1181 if (error) 1182 return error; 1183 } 1184 *oldlenp = sizeof(uid); 1185 return 0; 1186 } 1187 1188 static inline int 1189 inet4_ident_core(struct in_addr raddr, u_int rport, 1190 struct in_addr laddr, u_int lport, 1191 void *oldp, size_t *oldlenp, 1192 struct lwp *l, int dodrop) 1193 { 1194 struct inpcb *inp; 1195 struct socket *sockp; 1196 1197 inp = in_pcblookup_connect(&tcbtable, raddr, rport, laddr, lport); 1198 1199 if (inp == NULL || (sockp = inp->inp_socket) == NULL) 1200 return ESRCH; 1201 1202 if (dodrop) { 1203 struct tcpcb *tp; 1204 1205 if (inp == NULL || (tp = intotcpcb(inp)) == NULL || 1206 (inp->inp_socket->so_options & SO_ACCEPTCONN) != 0) 1207 return ESRCH; 1208 1209 if (check_sockuid(inp->inp_socket, l->l_cred) != 0) 1210 return EACCES; 1211 1212 (void)tcp_drop(tp, ECONNABORTED); 1213 return 0; 1214 } 1215 else 1216 return copyout_uid(sockp, oldp, oldlenp); 1217 } 1218 1219 #ifdef INET6 1220 static inline int 1221 inet6_ident_core(struct in6_addr *raddr, u_int rport, 1222 struct in6_addr *laddr, u_int lport, 1223 void *oldp, size_t *oldlenp, 1224 struct lwp *l, int dodrop) 1225 { 1226 struct in6pcb *in6p; 1227 struct socket *sockp; 1228 1229 in6p = in6_pcblookup_connect(&tcbtable, raddr, rport, laddr, lport, 0); 1230 1231 if (in6p == NULL || (sockp = in6p->in6p_socket) == NULL) 1232 return ESRCH; 1233 1234 if (dodrop) { 1235 struct tcpcb *tp; 1236 1237 if (in6p == NULL || (tp = in6totcpcb(in6p)) == NULL || 1238 (in6p->in6p_socket->so_options & SO_ACCEPTCONN) != 0) 1239 return ESRCH; 1240 1241 if (check_sockuid(in6p->in6p_socket, l->l_cred) != 0) 1242 return EACCES; 1243 1244 (void)tcp_drop(tp, ECONNABORTED); 1245 return 0; 1246 } 1247 else 1248 return copyout_uid(sockp, oldp, oldlenp); 1249 } 1250 #endif 1251 1252 /* 1253 * sysctl helper routine for the net.inet.tcp.drop and 1254 * net.inet6.tcp6.drop nodes. 1255 */ 1256 #define sysctl_net_inet_tcp_drop sysctl_net_inet_tcp_ident 1257 1258 /* 1259 * sysctl helper routine for the net.inet.tcp.ident and 1260 * net.inet6.tcp6.ident nodes. contains backwards compat code for the 1261 * old way of looking up the ident information for ipv4 which involves 1262 * stuffing the port/addr pairs into the mib lookup. 1263 */ 1264 static int 1265 sysctl_net_inet_tcp_ident(SYSCTLFN_ARGS) 1266 { 1267 #ifdef INET 1268 struct sockaddr_in *si4[2]; 1269 #endif /* INET */ 1270 #ifdef INET6 1271 struct sockaddr_in6 *si6[2]; 1272 #endif /* INET6 */ 1273 struct sockaddr_storage sa[2]; 1274 int error, pf, dodrop; 1275 1276 dodrop = name[-1] == TCPCTL_DROP; 1277 if (dodrop) { 1278 if (oldp != NULL || *oldlenp != 0) 1279 return EINVAL; 1280 if (newp == NULL) 1281 return EPERM; 1282 if (newlen < sizeof(sa)) 1283 return ENOMEM; 1284 } 1285 if (namelen != 4 && namelen != 0) 1286 return EINVAL; 1287 if (name[-2] != IPPROTO_TCP) 1288 return EINVAL; 1289 pf = name[-3]; 1290 1291 /* old style lookup, ipv4 only */ 1292 if (namelen == 4) { 1293 #ifdef INET 1294 struct in_addr laddr, raddr; 1295 u_int lport, rport; 1296 1297 if (pf != PF_INET) 1298 return EPROTONOSUPPORT; 1299 raddr.s_addr = (uint32_t)name[0]; 1300 rport = (u_int)name[1]; 1301 laddr.s_addr = (uint32_t)name[2]; 1302 lport = (u_int)name[3]; 1303 1304 mutex_enter(softnet_lock); 1305 error = inet4_ident_core(raddr, rport, laddr, lport, 1306 oldp, oldlenp, l, dodrop); 1307 mutex_exit(softnet_lock); 1308 return error; 1309 #else /* INET */ 1310 return EINVAL; 1311 #endif /* INET */ 1312 } 1313 1314 if (newp == NULL || newlen != sizeof(sa)) 1315 return EINVAL; 1316 error = copyin(newp, &sa, newlen); 1317 if (error) 1318 return error; 1319 1320 /* 1321 * requested families must match 1322 */ 1323 if (pf != sa[0].ss_family || sa[0].ss_family != sa[1].ss_family) 1324 return EINVAL; 1325 1326 switch (pf) { 1327 #ifdef INET6 1328 case PF_INET6: 1329 si6[0] = (struct sockaddr_in6*)&sa[0]; 1330 si6[1] = (struct sockaddr_in6*)&sa[1]; 1331 if (si6[0]->sin6_len != sizeof(*si6[0]) || 1332 si6[1]->sin6_len != sizeof(*si6[1])) 1333 return EINVAL; 1334 1335 if (!IN6_IS_ADDR_V4MAPPED(&si6[0]->sin6_addr) && 1336 !IN6_IS_ADDR_V4MAPPED(&si6[1]->sin6_addr)) { 1337 error = sa6_embedscope(si6[0], ip6_use_defzone); 1338 if (error) 1339 return error; 1340 error = sa6_embedscope(si6[1], ip6_use_defzone); 1341 if (error) 1342 return error; 1343 1344 mutex_enter(softnet_lock); 1345 error = inet6_ident_core(&si6[0]->sin6_addr, 1346 si6[0]->sin6_port, &si6[1]->sin6_addr, 1347 si6[1]->sin6_port, oldp, oldlenp, l, dodrop); 1348 mutex_exit(softnet_lock); 1349 return error; 1350 } 1351 1352 if (IN6_IS_ADDR_V4MAPPED(&si6[0]->sin6_addr) != 1353 IN6_IS_ADDR_V4MAPPED(&si6[1]->sin6_addr)) 1354 return EINVAL; 1355 1356 in6_sin6_2_sin_in_sock((struct sockaddr *)&sa[0]); 1357 in6_sin6_2_sin_in_sock((struct sockaddr *)&sa[1]); 1358 /*FALLTHROUGH*/ 1359 #endif /* INET6 */ 1360 #ifdef INET 1361 case PF_INET: 1362 si4[0] = (struct sockaddr_in*)&sa[0]; 1363 si4[1] = (struct sockaddr_in*)&sa[1]; 1364 if (si4[0]->sin_len != sizeof(*si4[0]) || 1365 si4[0]->sin_len != sizeof(*si4[1])) 1366 return EINVAL; 1367 1368 mutex_enter(softnet_lock); 1369 error = inet4_ident_core(si4[0]->sin_addr, si4[0]->sin_port, 1370 si4[1]->sin_addr, si4[1]->sin_port, 1371 oldp, oldlenp, l, dodrop); 1372 mutex_exit(softnet_lock); 1373 return error; 1374 #endif /* INET */ 1375 default: 1376 return EPROTONOSUPPORT; 1377 } 1378 } 1379 1380 /* 1381 * sysctl helper for the inet and inet6 pcblists. handles tcp/udp and 1382 * inet/inet6, as well as raw pcbs for each. specifically not 1383 * declared static so that raw sockets and udp/udp6 can use it as 1384 * well. 1385 */ 1386 int 1387 sysctl_inpcblist(SYSCTLFN_ARGS) 1388 { 1389 #ifdef INET 1390 struct sockaddr_in *in; 1391 const struct inpcb *inp; 1392 #endif 1393 #ifdef INET6 1394 struct sockaddr_in6 *in6; 1395 const struct in6pcb *in6p; 1396 #endif 1397 /* 1398 * sysctl_data is const, but CIRCLEQ_FOREACH can't use a const 1399 * struct inpcbtable pointer, so we have to discard const. :-/ 1400 */ 1401 struct inpcbtable *pcbtbl = __UNCONST(rnode->sysctl_data); 1402 const struct inpcb_hdr *inph; 1403 struct tcpcb *tp; 1404 struct kinfo_pcb pcb; 1405 char *dp; 1406 u_int op, arg; 1407 size_t len, needed, elem_size, out_size; 1408 int error, elem_count, pf, proto, pf2; 1409 1410 if (namelen != 4) 1411 return (EINVAL); 1412 1413 if (oldp != NULL) { 1414 len = *oldlenp; 1415 elem_size = name[2]; 1416 elem_count = name[3]; 1417 if (elem_size != sizeof(pcb)) 1418 return EINVAL; 1419 } else { 1420 len = 0; 1421 elem_count = INT_MAX; 1422 elem_size = sizeof(pcb); 1423 } 1424 error = 0; 1425 dp = oldp; 1426 op = name[0]; 1427 arg = name[1]; 1428 out_size = elem_size; 1429 needed = 0; 1430 1431 if (namelen == 1 && name[0] == CTL_QUERY) 1432 return (sysctl_query(SYSCTLFN_CALL(rnode))); 1433 1434 if (name - oname != 4) 1435 return (EINVAL); 1436 1437 pf = oname[1]; 1438 proto = oname[2]; 1439 pf2 = (oldp != NULL) ? pf : 0; 1440 1441 mutex_enter(softnet_lock); 1442 1443 CIRCLEQ_FOREACH(inph, &pcbtbl->inpt_queue, inph_queue) { 1444 #ifdef INET 1445 inp = (const struct inpcb *)inph; 1446 #endif 1447 #ifdef INET6 1448 in6p = (const struct in6pcb *)inph; 1449 #endif 1450 1451 if (inph->inph_af != pf) 1452 continue; 1453 1454 if (kauth_authorize_network(l->l_cred, KAUTH_NETWORK_SOCKET, 1455 KAUTH_REQ_NETWORK_SOCKET_CANSEE, inph->inph_socket, NULL, 1456 NULL) != 0) 1457 continue; 1458 1459 memset(&pcb, 0, sizeof(pcb)); 1460 1461 pcb.ki_family = pf; 1462 pcb.ki_type = proto; 1463 1464 switch (pf2) { 1465 case 0: 1466 /* just probing for size */ 1467 break; 1468 #ifdef INET 1469 case PF_INET: 1470 pcb.ki_family = inp->inp_socket->so_proto-> 1471 pr_domain->dom_family; 1472 pcb.ki_type = inp->inp_socket->so_proto-> 1473 pr_type; 1474 pcb.ki_protocol = inp->inp_socket->so_proto-> 1475 pr_protocol; 1476 pcb.ki_pflags = inp->inp_flags; 1477 1478 pcb.ki_sostate = inp->inp_socket->so_state; 1479 pcb.ki_prstate = inp->inp_state; 1480 if (proto == IPPROTO_TCP) { 1481 tp = intotcpcb(inp); 1482 pcb.ki_tstate = tp->t_state; 1483 pcb.ki_tflags = tp->t_flags; 1484 } 1485 1486 pcb.ki_pcbaddr = PTRTOUINT64(inp); 1487 pcb.ki_ppcbaddr = PTRTOUINT64(inp->inp_ppcb); 1488 pcb.ki_sockaddr = PTRTOUINT64(inp->inp_socket); 1489 1490 pcb.ki_rcvq = inp->inp_socket->so_rcv.sb_cc; 1491 pcb.ki_sndq = inp->inp_socket->so_snd.sb_cc; 1492 1493 in = satosin(&pcb.ki_src); 1494 in->sin_len = sizeof(*in); 1495 in->sin_family = pf; 1496 in->sin_port = inp->inp_lport; 1497 in->sin_addr = inp->inp_laddr; 1498 if (pcb.ki_prstate >= INP_CONNECTED) { 1499 in = satosin(&pcb.ki_dst); 1500 in->sin_len = sizeof(*in); 1501 in->sin_family = pf; 1502 in->sin_port = inp->inp_fport; 1503 in->sin_addr = inp->inp_faddr; 1504 } 1505 break; 1506 #endif 1507 #ifdef INET6 1508 case PF_INET6: 1509 pcb.ki_family = in6p->in6p_socket->so_proto-> 1510 pr_domain->dom_family; 1511 pcb.ki_type = in6p->in6p_socket->so_proto->pr_type; 1512 pcb.ki_protocol = in6p->in6p_socket->so_proto-> 1513 pr_protocol; 1514 pcb.ki_pflags = in6p->in6p_flags; 1515 1516 pcb.ki_sostate = in6p->in6p_socket->so_state; 1517 pcb.ki_prstate = in6p->in6p_state; 1518 if (proto == IPPROTO_TCP) { 1519 tp = in6totcpcb(in6p); 1520 pcb.ki_tstate = tp->t_state; 1521 pcb.ki_tflags = tp->t_flags; 1522 } 1523 1524 pcb.ki_pcbaddr = PTRTOUINT64(in6p); 1525 pcb.ki_ppcbaddr = PTRTOUINT64(in6p->in6p_ppcb); 1526 pcb.ki_sockaddr = PTRTOUINT64(in6p->in6p_socket); 1527 1528 pcb.ki_rcvq = in6p->in6p_socket->so_rcv.sb_cc; 1529 pcb.ki_sndq = in6p->in6p_socket->so_snd.sb_cc; 1530 1531 in6 = satosin6(&pcb.ki_src); 1532 in6->sin6_len = sizeof(*in6); 1533 in6->sin6_family = pf; 1534 in6->sin6_port = in6p->in6p_lport; 1535 in6->sin6_flowinfo = in6p->in6p_flowinfo; 1536 in6->sin6_addr = in6p->in6p_laddr; 1537 in6->sin6_scope_id = 0; /* XXX? */ 1538 1539 if (pcb.ki_prstate >= IN6P_CONNECTED) { 1540 in6 = satosin6(&pcb.ki_dst); 1541 in6->sin6_len = sizeof(*in6); 1542 in6->sin6_family = pf; 1543 in6->sin6_port = in6p->in6p_fport; 1544 in6->sin6_flowinfo = in6p->in6p_flowinfo; 1545 in6->sin6_addr = in6p->in6p_faddr; 1546 in6->sin6_scope_id = 0; /* XXX? */ 1547 } 1548 break; 1549 #endif 1550 } 1551 1552 if (len >= elem_size && elem_count > 0) { 1553 error = copyout(&pcb, dp, out_size); 1554 if (error) 1555 return (error); 1556 dp += elem_size; 1557 len -= elem_size; 1558 } 1559 if (elem_count > 0) { 1560 needed += elem_size; 1561 if (elem_count != INT_MAX) 1562 elem_count--; 1563 } 1564 } 1565 1566 *oldlenp = needed; 1567 if (oldp == NULL) 1568 *oldlenp += PCB_SLOP * sizeof(struct kinfo_pcb); 1569 1570 mutex_exit(softnet_lock); 1571 1572 return (error); 1573 } 1574 1575 static int 1576 sysctl_tcp_congctl(SYSCTLFN_ARGS) 1577 { 1578 struct sysctlnode node; 1579 int error; 1580 char newname[TCPCC_MAXLEN]; 1581 1582 strlcpy(newname, tcp_congctl_global_name, sizeof(newname) - 1); 1583 1584 node = *rnode; 1585 node.sysctl_data = newname; 1586 node.sysctl_size = sizeof(newname); 1587 1588 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1589 1590 if (error || 1591 newp == NULL || 1592 strncmp(newname, tcp_congctl_global_name, sizeof(newname)) == 0) 1593 return error; 1594 1595 mutex_enter(softnet_lock); 1596 error = tcp_congctl_select(NULL, newname); 1597 mutex_exit(softnet_lock); 1598 1599 return error; 1600 } 1601 1602 static int 1603 sysctl_tcp_keep(SYSCTLFN_ARGS) 1604 { 1605 int error; 1606 u_int tmp; 1607 struct sysctlnode node; 1608 1609 node = *rnode; 1610 tmp = *(u_int *)rnode->sysctl_data; 1611 node.sysctl_data = &tmp; 1612 1613 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1614 if (error || newp == NULL) 1615 return error; 1616 1617 mutex_enter(softnet_lock); 1618 1619 *(u_int *)rnode->sysctl_data = tmp; 1620 tcp_tcpcb_template(); /* update the template */ 1621 1622 mutex_exit(softnet_lock); 1623 return 0; 1624 } 1625 1626 static int 1627 sysctl_net_inet_tcp_stats(SYSCTLFN_ARGS) 1628 { 1629 1630 return (NETSTAT_SYSCTL(tcpstat_percpu, TCP_NSTATS)); 1631 } 1632 1633 /* 1634 * this (second stage) setup routine is a replacement for tcp_sysctl() 1635 * (which is currently used for ipv4 and ipv6) 1636 */ 1637 static void 1638 sysctl_net_inet_tcp_setup2(struct sysctllog **clog, int pf, const char *pfname, 1639 const char *tcpname) 1640 { 1641 const struct sysctlnode *sack_node; 1642 const struct sysctlnode *abc_node; 1643 const struct sysctlnode *ecn_node; 1644 const struct sysctlnode *congctl_node; 1645 #ifdef TCP_DEBUG 1646 extern struct tcp_debug tcp_debug[TCP_NDEBUG]; 1647 extern int tcp_debx; 1648 #endif 1649 1650 sysctl_createv(clog, 0, NULL, NULL, 1651 CTLFLAG_PERMANENT, 1652 CTLTYPE_NODE, "net", NULL, 1653 NULL, 0, NULL, 0, 1654 CTL_NET, CTL_EOL); 1655 sysctl_createv(clog, 0, NULL, NULL, 1656 CTLFLAG_PERMANENT, 1657 CTLTYPE_NODE, pfname, NULL, 1658 NULL, 0, NULL, 0, 1659 CTL_NET, pf, CTL_EOL); 1660 sysctl_createv(clog, 0, NULL, NULL, 1661 CTLFLAG_PERMANENT, 1662 CTLTYPE_NODE, tcpname, 1663 SYSCTL_DESCR("TCP related settings"), 1664 NULL, 0, NULL, 0, 1665 CTL_NET, pf, IPPROTO_TCP, CTL_EOL); 1666 1667 sysctl_createv(clog, 0, NULL, NULL, 1668 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1669 CTLTYPE_INT, "rfc1323", 1670 SYSCTL_DESCR("Enable RFC1323 TCP extensions"), 1671 NULL, 0, &tcp_do_rfc1323, 0, 1672 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RFC1323, CTL_EOL); 1673 sysctl_createv(clog, 0, NULL, NULL, 1674 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1675 CTLTYPE_INT, "sendspace", 1676 SYSCTL_DESCR("Default TCP send buffer size"), 1677 NULL, 0, &tcp_sendspace, 0, 1678 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SENDSPACE, CTL_EOL); 1679 sysctl_createv(clog, 0, NULL, NULL, 1680 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1681 CTLTYPE_INT, "recvspace", 1682 SYSCTL_DESCR("Default TCP receive buffer size"), 1683 NULL, 0, &tcp_recvspace, 0, 1684 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RECVSPACE, CTL_EOL); 1685 sysctl_createv(clog, 0, NULL, NULL, 1686 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1687 CTLTYPE_INT, "mssdflt", 1688 SYSCTL_DESCR("Default maximum segment size"), 1689 sysctl_net_inet_tcp_mssdflt, 0, &tcp_mssdflt, 0, 1690 CTL_NET, pf, IPPROTO_TCP, TCPCTL_MSSDFLT, CTL_EOL); 1691 sysctl_createv(clog, 0, NULL, NULL, 1692 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1693 CTLTYPE_INT, "minmss", 1694 SYSCTL_DESCR("Lower limit for TCP maximum segment size"), 1695 NULL, 0, &tcp_minmss, 0, 1696 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1697 sysctl_createv(clog, 0, NULL, NULL, 1698 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1699 CTLTYPE_INT, "syn_cache_limit", 1700 SYSCTL_DESCR("Maximum number of entries in the TCP " 1701 "compressed state engine"), 1702 NULL, 0, &tcp_syn_cache_limit, 0, 1703 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_CACHE_LIMIT, 1704 CTL_EOL); 1705 sysctl_createv(clog, 0, NULL, NULL, 1706 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1707 CTLTYPE_INT, "syn_bucket_limit", 1708 SYSCTL_DESCR("Maximum number of entries per hash " 1709 "bucket in the TCP compressed state " 1710 "engine"), 1711 NULL, 0, &tcp_syn_bucket_limit, 0, 1712 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_BUCKET_LIMIT, 1713 CTL_EOL); 1714 #if 0 /* obsoleted */ 1715 sysctl_createv(clog, 0, NULL, NULL, 1716 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1717 CTLTYPE_INT, "syn_cache_interval", 1718 SYSCTL_DESCR("TCP compressed state engine's timer interval"), 1719 NULL, 0, &tcp_syn_cache_interval, 0, 1720 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_CACHE_INTER, 1721 CTL_EOL); 1722 #endif 1723 sysctl_createv(clog, 0, NULL, NULL, 1724 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1725 CTLTYPE_INT, "init_win", 1726 SYSCTL_DESCR("Initial TCP congestion window"), 1727 NULL, 0, &tcp_init_win, 0, 1728 CTL_NET, pf, IPPROTO_TCP, TCPCTL_INIT_WIN, CTL_EOL); 1729 sysctl_createv(clog, 0, NULL, NULL, 1730 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1731 CTLTYPE_INT, "mss_ifmtu", 1732 SYSCTL_DESCR("Use interface MTU for calculating MSS"), 1733 NULL, 0, &tcp_mss_ifmtu, 0, 1734 CTL_NET, pf, IPPROTO_TCP, TCPCTL_MSS_IFMTU, CTL_EOL); 1735 sysctl_createv(clog, 0, NULL, &sack_node, 1736 CTLFLAG_PERMANENT, 1737 CTLTYPE_NODE, "sack", 1738 SYSCTL_DESCR("RFC2018 Selective ACKnowledgement tunables"), 1739 NULL, 0, NULL, 0, 1740 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_EOL); 1741 1742 /* Congctl subtree */ 1743 sysctl_createv(clog, 0, NULL, &congctl_node, 1744 CTLFLAG_PERMANENT, 1745 CTLTYPE_NODE, "congctl", 1746 SYSCTL_DESCR("TCP Congestion Control"), 1747 NULL, 0, NULL, 0, 1748 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1749 sysctl_createv(clog, 0, &congctl_node, NULL, 1750 CTLFLAG_PERMANENT, 1751 CTLTYPE_STRING, "available", 1752 SYSCTL_DESCR("Available Congestion Control Mechanisms"), 1753 NULL, 0, &tcp_congctl_avail, 0, CTL_CREATE, CTL_EOL); 1754 sysctl_createv(clog, 0, &congctl_node, NULL, 1755 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1756 CTLTYPE_STRING, "selected", 1757 SYSCTL_DESCR("Selected Congestion Control Mechanism"), 1758 sysctl_tcp_congctl, 0, NULL, TCPCC_MAXLEN, 1759 CTL_CREATE, CTL_EOL); 1760 1761 sysctl_createv(clog, 0, NULL, NULL, 1762 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1763 CTLTYPE_INT, "win_scale", 1764 SYSCTL_DESCR("Use RFC1323 window scale options"), 1765 NULL, 0, &tcp_do_win_scale, 0, 1766 CTL_NET, pf, IPPROTO_TCP, TCPCTL_WSCALE, CTL_EOL); 1767 sysctl_createv(clog, 0, NULL, NULL, 1768 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1769 CTLTYPE_INT, "timestamps", 1770 SYSCTL_DESCR("Use RFC1323 time stamp options"), 1771 NULL, 0, &tcp_do_timestamps, 0, 1772 CTL_NET, pf, IPPROTO_TCP, TCPCTL_TSTAMP, CTL_EOL); 1773 sysctl_createv(clog, 0, NULL, NULL, 1774 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1775 CTLTYPE_INT, "compat_42", 1776 SYSCTL_DESCR("Enable workarounds for 4.2BSD TCP bugs"), 1777 NULL, 0, &tcp_compat_42, 0, 1778 CTL_NET, pf, IPPROTO_TCP, TCPCTL_COMPAT_42, CTL_EOL); 1779 sysctl_createv(clog, 0, NULL, NULL, 1780 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1781 CTLTYPE_INT, "cwm", 1782 SYSCTL_DESCR("Hughes/Touch/Heidemann Congestion Window " 1783 "Monitoring"), 1784 NULL, 0, &tcp_cwm, 0, 1785 CTL_NET, pf, IPPROTO_TCP, TCPCTL_CWM, CTL_EOL); 1786 sysctl_createv(clog, 0, NULL, NULL, 1787 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1788 CTLTYPE_INT, "cwm_burstsize", 1789 SYSCTL_DESCR("Congestion Window Monitoring allowed " 1790 "burst count in packets"), 1791 NULL, 0, &tcp_cwm_burstsize, 0, 1792 CTL_NET, pf, IPPROTO_TCP, TCPCTL_CWM_BURSTSIZE, 1793 CTL_EOL); 1794 sysctl_createv(clog, 0, NULL, NULL, 1795 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1796 CTLTYPE_INT, "ack_on_push", 1797 SYSCTL_DESCR("Immediately return ACK when PSH is " 1798 "received"), 1799 NULL, 0, &tcp_ack_on_push, 0, 1800 CTL_NET, pf, IPPROTO_TCP, TCPCTL_ACK_ON_PUSH, CTL_EOL); 1801 sysctl_createv(clog, 0, NULL, NULL, 1802 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1803 CTLTYPE_INT, "keepidle", 1804 SYSCTL_DESCR("Allowed connection idle ticks before a " 1805 "keepalive probe is sent"), 1806 sysctl_tcp_keep, 0, &tcp_keepidle, 0, 1807 CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPIDLE, CTL_EOL); 1808 sysctl_createv(clog, 0, NULL, NULL, 1809 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1810 CTLTYPE_INT, "keepintvl", 1811 SYSCTL_DESCR("Ticks before next keepalive probe is sent"), 1812 sysctl_tcp_keep, 0, &tcp_keepintvl, 0, 1813 CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPINTVL, CTL_EOL); 1814 sysctl_createv(clog, 0, NULL, NULL, 1815 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1816 CTLTYPE_INT, "keepcnt", 1817 SYSCTL_DESCR("Number of keepalive probes to send"), 1818 sysctl_tcp_keep, 0, &tcp_keepcnt, 0, 1819 CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPCNT, CTL_EOL); 1820 sysctl_createv(clog, 0, NULL, NULL, 1821 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 1822 CTLTYPE_INT, "slowhz", 1823 SYSCTL_DESCR("Keepalive ticks per second"), 1824 NULL, PR_SLOWHZ, NULL, 0, 1825 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SLOWHZ, CTL_EOL); 1826 sysctl_createv(clog, 0, NULL, NULL, 1827 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1828 CTLTYPE_INT, "log_refused", 1829 SYSCTL_DESCR("Log refused TCP connections"), 1830 NULL, 0, &tcp_log_refused, 0, 1831 CTL_NET, pf, IPPROTO_TCP, TCPCTL_LOG_REFUSED, CTL_EOL); 1832 #if 0 /* obsoleted */ 1833 sysctl_createv(clog, 0, NULL, NULL, 1834 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1835 CTLTYPE_INT, "rstratelimit", NULL, 1836 NULL, 0, &tcp_rst_ratelim, 0, 1837 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RSTRATELIMIT, CTL_EOL); 1838 #endif 1839 sysctl_createv(clog, 0, NULL, NULL, 1840 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1841 CTLTYPE_INT, "rstppslimit", 1842 SYSCTL_DESCR("Maximum number of RST packets to send " 1843 "per second"), 1844 NULL, 0, &tcp_rst_ppslim, 0, 1845 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RSTPPSLIMIT, CTL_EOL); 1846 sysctl_createv(clog, 0, NULL, NULL, 1847 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1848 CTLTYPE_INT, "delack_ticks", 1849 SYSCTL_DESCR("Number of ticks to delay sending an ACK"), 1850 NULL, 0, &tcp_delack_ticks, 0, 1851 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DELACK_TICKS, CTL_EOL); 1852 sysctl_createv(clog, 0, NULL, NULL, 1853 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1854 CTLTYPE_INT, "init_win_local", 1855 SYSCTL_DESCR("Initial TCP window size (in segments)"), 1856 NULL, 0, &tcp_init_win_local, 0, 1857 CTL_NET, pf, IPPROTO_TCP, TCPCTL_INIT_WIN_LOCAL, 1858 CTL_EOL); 1859 sysctl_createv(clog, 0, NULL, NULL, 1860 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1861 CTLTYPE_STRUCT, "ident", 1862 SYSCTL_DESCR("RFC1413 Identification Protocol lookups"), 1863 sysctl_net_inet_tcp_ident, 0, NULL, sizeof(uid_t), 1864 CTL_NET, pf, IPPROTO_TCP, TCPCTL_IDENT, CTL_EOL); 1865 sysctl_createv(clog, 0, NULL, NULL, 1866 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1867 CTLTYPE_INT, "do_loopback_cksum", 1868 SYSCTL_DESCR("Perform TCP checksum on loopback"), 1869 NULL, 0, &tcp_do_loopback_cksum, 0, 1870 CTL_NET, pf, IPPROTO_TCP, TCPCTL_LOOPBACKCKSUM, 1871 CTL_EOL); 1872 sysctl_createv(clog, 0, NULL, NULL, 1873 CTLFLAG_PERMANENT, 1874 CTLTYPE_STRUCT, "pcblist", 1875 SYSCTL_DESCR("TCP protocol control block list"), 1876 sysctl_inpcblist, 0, &tcbtable, 0, 1877 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, 1878 CTL_EOL); 1879 sysctl_createv(clog, 0, NULL, NULL, 1880 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1881 CTLTYPE_INT, "keepinit", 1882 SYSCTL_DESCR("Ticks before initial tcp connection times out"), 1883 sysctl_tcp_keep, 0, &tcp_keepinit, 0, 1884 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1885 1886 /* TCP socket buffers auto-sizing nodes */ 1887 sysctl_createv(clog, 0, NULL, NULL, 1888 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1889 CTLTYPE_INT, "recvbuf_auto", 1890 SYSCTL_DESCR("Enable automatic receive " 1891 "buffer sizing (experimental)"), 1892 NULL, 0, &tcp_do_autorcvbuf, 0, 1893 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1894 sysctl_createv(clog, 0, NULL, NULL, 1895 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1896 CTLTYPE_INT, "recvbuf_inc", 1897 SYSCTL_DESCR("Incrementor step size of " 1898 "automatic receive buffer"), 1899 NULL, 0, &tcp_autorcvbuf_inc, 0, 1900 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1901 sysctl_createv(clog, 0, NULL, NULL, 1902 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1903 CTLTYPE_INT, "recvbuf_max", 1904 SYSCTL_DESCR("Max size of automatic receive buffer"), 1905 NULL, 0, &tcp_autorcvbuf_max, 0, 1906 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1907 1908 sysctl_createv(clog, 0, NULL, NULL, 1909 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1910 CTLTYPE_INT, "sendbuf_auto", 1911 SYSCTL_DESCR("Enable automatic send " 1912 "buffer sizing (experimental)"), 1913 NULL, 0, &tcp_do_autosndbuf, 0, 1914 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1915 sysctl_createv(clog, 0, NULL, NULL, 1916 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1917 CTLTYPE_INT, "sendbuf_inc", 1918 SYSCTL_DESCR("Incrementor step size of " 1919 "automatic send buffer"), 1920 NULL, 0, &tcp_autosndbuf_inc, 0, 1921 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1922 sysctl_createv(clog, 0, NULL, NULL, 1923 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1924 CTLTYPE_INT, "sendbuf_max", 1925 SYSCTL_DESCR("Max size of automatic send buffer"), 1926 NULL, 0, &tcp_autosndbuf_max, 0, 1927 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1928 1929 /* ECN subtree */ 1930 sysctl_createv(clog, 0, NULL, &ecn_node, 1931 CTLFLAG_PERMANENT, 1932 CTLTYPE_NODE, "ecn", 1933 SYSCTL_DESCR("RFC3168 Explicit Congestion Notification"), 1934 NULL, 0, NULL, 0, 1935 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1936 sysctl_createv(clog, 0, &ecn_node, NULL, 1937 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1938 CTLTYPE_INT, "enable", 1939 SYSCTL_DESCR("Enable TCP Explicit Congestion " 1940 "Notification"), 1941 NULL, 0, &tcp_do_ecn, 0, CTL_CREATE, CTL_EOL); 1942 sysctl_createv(clog, 0, &ecn_node, NULL, 1943 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1944 CTLTYPE_INT, "maxretries", 1945 SYSCTL_DESCR("Number of times to retry ECN setup " 1946 "before disabling ECN on the connection"), 1947 NULL, 0, &tcp_ecn_maxretries, 0, CTL_CREATE, CTL_EOL); 1948 1949 /* SACK gets it's own little subtree. */ 1950 sysctl_createv(clog, 0, NULL, &sack_node, 1951 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1952 CTLTYPE_INT, "enable", 1953 SYSCTL_DESCR("Enable RFC2018 Selective ACKnowledgement"), 1954 NULL, 0, &tcp_do_sack, 0, 1955 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 1956 sysctl_createv(clog, 0, NULL, &sack_node, 1957 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1958 CTLTYPE_INT, "maxholes", 1959 SYSCTL_DESCR("Maximum number of TCP SACK holes allowed per connection"), 1960 NULL, 0, &tcp_sack_tp_maxholes, 0, 1961 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 1962 sysctl_createv(clog, 0, NULL, &sack_node, 1963 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1964 CTLTYPE_INT, "globalmaxholes", 1965 SYSCTL_DESCR("Global maximum number of TCP SACK holes"), 1966 NULL, 0, &tcp_sack_globalmaxholes, 0, 1967 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 1968 sysctl_createv(clog, 0, NULL, &sack_node, 1969 CTLFLAG_PERMANENT, 1970 CTLTYPE_INT, "globalholes", 1971 SYSCTL_DESCR("Global number of TCP SACK holes"), 1972 NULL, 0, &tcp_sack_globalholes, 0, 1973 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 1974 1975 sysctl_createv(clog, 0, NULL, NULL, 1976 CTLFLAG_PERMANENT, 1977 CTLTYPE_STRUCT, "stats", 1978 SYSCTL_DESCR("TCP statistics"), 1979 sysctl_net_inet_tcp_stats, 0, NULL, 0, 1980 CTL_NET, pf, IPPROTO_TCP, TCPCTL_STATS, 1981 CTL_EOL); 1982 #ifdef TCP_DEBUG 1983 sysctl_createv(clog, 0, NULL, NULL, 1984 CTLFLAG_PERMANENT, 1985 CTLTYPE_STRUCT, "debug", 1986 SYSCTL_DESCR("TCP sockets debug information"), 1987 NULL, 0, &tcp_debug, sizeof(tcp_debug), 1988 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DEBUG, 1989 CTL_EOL); 1990 sysctl_createv(clog, 0, NULL, NULL, 1991 CTLFLAG_PERMANENT, 1992 CTLTYPE_INT, "debx", 1993 SYSCTL_DESCR("Number of TCP debug sockets messages"), 1994 NULL, 0, &tcp_debx, sizeof(tcp_debx), 1995 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DEBX, 1996 CTL_EOL); 1997 #endif 1998 sysctl_createv(clog, 0, NULL, NULL, 1999 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2000 CTLTYPE_STRUCT, "drop", 2001 SYSCTL_DESCR("TCP drop connection"), 2002 sysctl_net_inet_tcp_drop, 0, NULL, 0, 2003 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DROP, CTL_EOL); 2004 #if NRND > 0 2005 sysctl_createv(clog, 0, NULL, NULL, 2006 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2007 CTLTYPE_INT, "iss_hash", 2008 SYSCTL_DESCR("Enable RFC 1948 ISS by cryptographic " 2009 "hash computation"), 2010 NULL, 0, &tcp_do_rfc1948, sizeof(tcp_do_rfc1948), 2011 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, 2012 CTL_EOL); 2013 #endif 2014 2015 /* ABC subtree */ 2016 2017 sysctl_createv(clog, 0, NULL, &abc_node, 2018 CTLFLAG_PERMANENT, CTLTYPE_NODE, "abc", 2019 SYSCTL_DESCR("RFC3465 Appropriate Byte Counting (ABC)"), 2020 NULL, 0, NULL, 0, 2021 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2022 sysctl_createv(clog, 0, &abc_node, NULL, 2023 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2024 CTLTYPE_INT, "enable", 2025 SYSCTL_DESCR("Enable RFC3465 Appropriate Byte Counting"), 2026 NULL, 0, &tcp_do_abc, 0, CTL_CREATE, CTL_EOL); 2027 sysctl_createv(clog, 0, &abc_node, NULL, 2028 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2029 CTLTYPE_INT, "aggressive", 2030 SYSCTL_DESCR("1: L=2*SMSS 0: L=1*SMSS"), 2031 NULL, 0, &tcp_abc_aggressive, 0, CTL_CREATE, CTL_EOL); 2032 } 2033 2034 /* 2035 * Sysctl for tcp variables. 2036 */ 2037 #ifdef INET 2038 SYSCTL_SETUP(sysctl_net_inet_tcp_setup, "sysctl net.inet.tcp subtree setup") 2039 { 2040 2041 sysctl_net_inet_tcp_setup2(clog, PF_INET, "inet", "tcp"); 2042 } 2043 #endif /* INET */ 2044 2045 #ifdef INET6 2046 SYSCTL_SETUP(sysctl_net_inet6_tcp6_setup, "sysctl net.inet6.tcp6 subtree setup") 2047 { 2048 2049 sysctl_net_inet_tcp_setup2(clog, PF_INET6, "inet6", "tcp6"); 2050 } 2051 #endif /* INET6 */ 2052