tcp_usrreq.c revision 1.148
1 /* $NetBSD: tcp_usrreq.c,v 1.148 2008/08/20 18:35:20 matt 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 1.148 2008/08/20 18:35:20 matt 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> 120 121 #include <net/if.h> 122 #include <net/route.h> 123 124 #include <netinet/in.h> 125 #include <netinet/in_systm.h> 126 #include <netinet/in_var.h> 127 #include <netinet/ip.h> 128 #include <netinet/in_pcb.h> 129 #include <netinet/ip_var.h> 130 #include <netinet/in_offload.h> 131 132 #ifdef INET6 133 #ifndef INET 134 #include <netinet/in.h> 135 #endif 136 #include <netinet/ip6.h> 137 #include <netinet6/in6_pcb.h> 138 #include <netinet6/ip6_var.h> 139 #include <netinet6/scope6_var.h> 140 #endif 141 142 #include <netinet/tcp.h> 143 #include <netinet/tcp_fsm.h> 144 #include <netinet/tcp_seq.h> 145 #include <netinet/tcp_timer.h> 146 #include <netinet/tcp_var.h> 147 #include <netinet/tcp_private.h> 148 #include <netinet/tcp_congctl.h> 149 #include <netinet/tcpip.h> 150 #include <netinet/tcp_debug.h> 151 152 #include "opt_tcp_space.h" 153 154 #ifdef IPSEC 155 #include <netinet6/ipsec.h> 156 #endif /*IPSEC*/ 157 158 /* 159 * TCP protocol interface to socket abstraction. 160 */ 161 162 /* 163 * Process a TCP user request for TCP tb. If this is a send request 164 * then m is the mbuf chain of send data. If this is a timer expiration 165 * (called from the software clock routine), then timertype tells which timer. 166 */ 167 /*ARGSUSED*/ 168 int 169 tcp_usrreq(struct socket *so, int req, 170 struct mbuf *m, struct mbuf *nam, struct mbuf *control, struct lwp *l) 171 { 172 struct inpcb *inp; 173 #ifdef INET6 174 struct in6pcb *in6p; 175 #endif 176 struct tcpcb *tp = NULL; 177 int s; 178 int error = 0; 179 #ifdef TCP_DEBUG 180 int ostate = 0; 181 #endif 182 int family; /* family of the socket */ 183 184 family = so->so_proto->pr_domain->dom_family; 185 186 if (req == PRU_CONTROL) { 187 switch (family) { 188 #ifdef INET 189 case PF_INET: 190 return (in_control(so, (long)m, (void *)nam, 191 (struct ifnet *)control, l)); 192 #endif 193 #ifdef INET6 194 case PF_INET6: 195 return (in6_control(so, (long)m, (void *)nam, 196 (struct ifnet *)control, l)); 197 #endif 198 default: 199 return EAFNOSUPPORT; 200 } 201 } 202 203 s = splsoftnet(); 204 205 if (req == PRU_PURGEIF) { 206 mutex_enter(softnet_lock); 207 switch (family) { 208 #ifdef INET 209 case PF_INET: 210 in_pcbpurgeif0(&tcbtable, (struct ifnet *)control); 211 in_purgeif((struct ifnet *)control); 212 in_pcbpurgeif(&tcbtable, (struct ifnet *)control); 213 break; 214 #endif 215 #ifdef INET6 216 case PF_INET6: 217 in6_pcbpurgeif0(&tcbtable, (struct ifnet *)control); 218 in6_purgeif((struct ifnet *)control); 219 in6_pcbpurgeif(&tcbtable, (struct ifnet *)control); 220 break; 221 #endif 222 default: 223 mutex_exit(softnet_lock); 224 splx(s); 225 return (EAFNOSUPPORT); 226 } 227 mutex_exit(softnet_lock); 228 splx(s); 229 return (0); 230 } 231 232 if (req == PRU_ATTACH) 233 sosetlock(so); 234 235 switch (family) { 236 #ifdef INET 237 case PF_INET: 238 inp = sotoinpcb(so); 239 #ifdef INET6 240 in6p = NULL; 241 #endif 242 break; 243 #endif 244 #ifdef INET6 245 case PF_INET6: 246 inp = NULL; 247 in6p = sotoin6pcb(so); 248 break; 249 #endif 250 default: 251 splx(s); 252 return EAFNOSUPPORT; 253 } 254 255 #ifdef DIAGNOSTIC 256 #ifdef INET6 257 if (inp && in6p) 258 panic("tcp_usrreq: both inp and in6p set to non-NULL"); 259 #endif 260 if (req != PRU_SEND && req != PRU_SENDOOB && control) 261 panic("tcp_usrreq: unexpected control mbuf"); 262 #endif 263 /* 264 * When a TCP is attached to a socket, then there will be 265 * a (struct inpcb) pointed at by the socket, and this 266 * structure will point at a subsidary (struct tcpcb). 267 */ 268 #ifndef INET6 269 if (inp == 0 && req != PRU_ATTACH) 270 #else 271 if ((inp == 0 && in6p == 0) && req != PRU_ATTACH) 272 #endif 273 { 274 error = EINVAL; 275 goto release; 276 } 277 #ifdef INET 278 if (inp) { 279 tp = intotcpcb(inp); 280 /* WHAT IF TP IS 0? */ 281 #ifdef KPROF 282 tcp_acounts[tp->t_state][req]++; 283 #endif 284 #ifdef TCP_DEBUG 285 ostate = tp->t_state; 286 #endif 287 } 288 #endif 289 #ifdef INET6 290 if (in6p) { 291 tp = in6totcpcb(in6p); 292 /* WHAT IF TP IS 0? */ 293 #ifdef KPROF 294 tcp_acounts[tp->t_state][req]++; 295 #endif 296 #ifdef TCP_DEBUG 297 ostate = tp->t_state; 298 #endif 299 } 300 #endif 301 302 switch (req) { 303 304 /* 305 * TCP attaches to socket via PRU_ATTACH, reserving space, 306 * and an internet control block. 307 */ 308 case PRU_ATTACH: 309 #ifndef INET6 310 if (inp != 0) 311 #else 312 if (inp != 0 || in6p != 0) 313 #endif 314 { 315 error = EISCONN; 316 break; 317 } 318 error = tcp_attach(so); 319 if (error) 320 break; 321 if ((so->so_options & SO_LINGER) && so->so_linger == 0) 322 so->so_linger = TCP_LINGERTIME; 323 tp = sototcpcb(so); 324 break; 325 326 /* 327 * PRU_DETACH detaches the TCP protocol from the socket. 328 */ 329 case PRU_DETACH: 330 tp = tcp_disconnect(tp); 331 break; 332 333 /* 334 * Give the socket an address. 335 */ 336 case PRU_BIND: 337 switch (family) { 338 #ifdef INET 339 case PF_INET: 340 error = in_pcbbind(inp, nam, l); 341 break; 342 #endif 343 #ifdef INET6 344 case PF_INET6: 345 error = in6_pcbbind(in6p, nam, l); 346 if (!error) { 347 /* mapped addr case */ 348 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_laddr)) 349 tp->t_family = AF_INET; 350 else 351 tp->t_family = AF_INET6; 352 } 353 break; 354 #endif 355 } 356 break; 357 358 /* 359 * Prepare to accept connections. 360 */ 361 case PRU_LISTEN: 362 #ifdef INET 363 if (inp && inp->inp_lport == 0) { 364 error = in_pcbbind(inp, (struct mbuf *)0, l); 365 if (error) 366 break; 367 } 368 #endif 369 #ifdef INET6 370 if (in6p && in6p->in6p_lport == 0) { 371 error = in6_pcbbind(in6p, (struct mbuf *)0, 372 (struct lwp *)0); 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, (struct mbuf *)0, 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, (struct mbuf *)0, 402 (struct lwp *)0); 403 if (error) 404 break; 405 } 406 error = in6_pcbconnect(in6p, nam, l); 407 if (!error) { 408 /* mapped addr case */ 409 if (IN6_IS_ADDR_V4MAPPED(&in6p->in6p_faddr)) 410 tp->t_family = AF_INET; 411 else 412 tp->t_family = AF_INET6; 413 } 414 } 415 #endif 416 if (error) 417 break; 418 tp->t_template = tcp_template(tp); 419 if (tp->t_template == 0) { 420 #ifdef INET 421 if (inp) 422 in_pcbdisconnect(inp); 423 #endif 424 #ifdef INET6 425 if (in6p) 426 in6_pcbdisconnect(in6p); 427 #endif 428 error = ENOBUFS; 429 break; 430 } 431 /* 432 * Compute window scaling to request. 433 * XXX: This should be moved to tcp_output(). 434 */ 435 while (tp->request_r_scale < TCP_MAX_WINSHIFT && 436 (TCP_MAXWIN << tp->request_r_scale) < sb_max) 437 tp->request_r_scale++; 438 soisconnecting(so); 439 TCP_STATINC(TCP_STAT_CONNATTEMPT); 440 tp->t_state = TCPS_SYN_SENT; 441 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepinit); 442 tp->iss = tcp_new_iss(tp, 0); 443 tcp_sendseqinit(tp); 444 error = tcp_output(tp); 445 break; 446 447 /* 448 * Create a TCP connection between two sockets. 449 */ 450 case PRU_CONNECT2: 451 error = EOPNOTSUPP; 452 break; 453 454 /* 455 * Initiate disconnect from peer. 456 * If connection never passed embryonic stage, just drop; 457 * else if don't need to let data drain, then can just drop anyways, 458 * else have to begin TCP shutdown process: mark socket disconnecting, 459 * drain unread data, state switch to reflect user close, and 460 * send segment (e.g. FIN) to peer. Socket will be really disconnected 461 * when peer sends FIN and acks ours. 462 * 463 * SHOULD IMPLEMENT LATER PRU_CONNECT VIA REALLOC TCPCB. 464 */ 465 case PRU_DISCONNECT: 466 tp = tcp_disconnect(tp); 467 break; 468 469 /* 470 * Accept a connection. Essentially all the work is 471 * done at higher levels; just return the address 472 * of the peer, storing through addr. 473 */ 474 case PRU_ACCEPT: 475 #ifdef INET 476 if (inp) 477 in_setpeeraddr(inp, nam); 478 #endif 479 #ifdef INET6 480 if (in6p) 481 in6_setpeeraddr(in6p, nam); 482 #endif 483 break; 484 485 /* 486 * Mark the connection as being incapable of further output. 487 */ 488 case PRU_SHUTDOWN: 489 socantsendmore(so); 490 tp = tcp_usrclosed(tp); 491 if (tp) 492 error = tcp_output(tp); 493 break; 494 495 /* 496 * After a receive, possibly send window update to peer. 497 */ 498 case PRU_RCVD: 499 /* 500 * soreceive() calls this function when a user receives 501 * ancillary data on a listening socket. We don't call 502 * tcp_output in such a case, since there is no header 503 * template for a listening socket and hence the kernel 504 * will panic. 505 */ 506 if ((so->so_state & (SS_ISCONNECTED|SS_ISCONNECTING)) != 0) 507 (void) tcp_output(tp); 508 break; 509 510 /* 511 * Do a send by putting data in output queue and updating urgent 512 * marker if URG set. Possibly send more data. 513 */ 514 case PRU_SEND: 515 if (control && control->m_len) { 516 m_freem(control); 517 m_freem(m); 518 error = EINVAL; 519 break; 520 } 521 sbappendstream(&so->so_snd, m); 522 error = tcp_output(tp); 523 break; 524 525 /* 526 * Abort the TCP. 527 */ 528 case PRU_ABORT: 529 tp = tcp_drop(tp, ECONNABORTED); 530 break; 531 532 case PRU_SENSE: 533 /* 534 * stat: don't bother with a blocksize. 535 */ 536 splx(s); 537 return (0); 538 539 case PRU_RCVOOB: 540 if (control && control->m_len) { 541 m_freem(control); 542 m_freem(m); 543 error = EINVAL; 544 break; 545 } 546 if ((so->so_oobmark == 0 && 547 (so->so_state & SS_RCVATMARK) == 0) || 548 so->so_options & SO_OOBINLINE || 549 tp->t_oobflags & TCPOOB_HADDATA) { 550 error = EINVAL; 551 break; 552 } 553 if ((tp->t_oobflags & TCPOOB_HAVEDATA) == 0) { 554 error = EWOULDBLOCK; 555 break; 556 } 557 m->m_len = 1; 558 *mtod(m, char *) = tp->t_iobc; 559 if (((long)nam & MSG_PEEK) == 0) 560 tp->t_oobflags ^= (TCPOOB_HAVEDATA | TCPOOB_HADDATA); 561 break; 562 563 case PRU_SENDOOB: 564 if (sbspace(&so->so_snd) < -512) { 565 m_freem(m); 566 error = ENOBUFS; 567 break; 568 } 569 /* 570 * According to RFC961 (Assigned Protocols), 571 * the urgent pointer points to the last octet 572 * of urgent data. We continue, however, 573 * to consider it to indicate the first octet 574 * of data past the urgent section. 575 * Otherwise, snd_up should be one lower. 576 */ 577 sbappendstream(&so->so_snd, m); 578 tp->snd_up = tp->snd_una + so->so_snd.sb_cc; 579 tp->t_force = 1; 580 error = tcp_output(tp); 581 tp->t_force = 0; 582 break; 583 584 case PRU_SOCKADDR: 585 #ifdef INET 586 if (inp) 587 in_setsockaddr(inp, nam); 588 #endif 589 #ifdef INET6 590 if (in6p) 591 in6_setsockaddr(in6p, nam); 592 #endif 593 break; 594 595 case PRU_PEERADDR: 596 #ifdef INET 597 if (inp) 598 in_setpeeraddr(inp, nam); 599 #endif 600 #ifdef INET6 601 if (in6p) 602 in6_setpeeraddr(in6p, nam); 603 #endif 604 break; 605 606 default: 607 panic("tcp_usrreq"); 608 } 609 #ifdef TCP_DEBUG 610 if (tp && (so->so_options & SO_DEBUG)) 611 tcp_trace(TA_USER, ostate, tp, NULL, req); 612 #endif 613 614 release: 615 splx(s); 616 return (error); 617 } 618 619 static void 620 change_keepalive(struct socket *so, struct tcpcb *tp) 621 { 622 tp->t_maxidle = tp->t_keepcnt * tp->t_keepintvl; 623 TCP_TIMER_DISARM(tp, TCPT_KEEP); 624 TCP_TIMER_DISARM(tp, TCPT_2MSL); 625 626 if (tp->t_state == TCPS_SYN_RECEIVED || 627 tp->t_state == TCPS_SYN_SENT) { 628 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepinit); 629 } else if (so->so_options & SO_KEEPALIVE && 630 tp->t_state <= TCPS_CLOSE_WAIT) { 631 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepintvl); 632 } else { 633 TCP_TIMER_ARM(tp, TCPT_KEEP, tp->t_keepidle); 634 } 635 636 if ((tp->t_state == TCPS_FIN_WAIT_2) && (tp->t_maxidle > 0)) 637 TCP_TIMER_ARM(tp, TCPT_2MSL, tp->t_maxidle); 638 } 639 640 641 int 642 tcp_ctloutput(int op, struct socket *so, struct sockopt *sopt) 643 { 644 int error = 0, s; 645 struct inpcb *inp; 646 #ifdef INET6 647 struct in6pcb *in6p; 648 #endif 649 struct tcpcb *tp; 650 u_int ui; 651 int family; /* family of the socket */ 652 int level, optname, optval; 653 654 level = sopt->sopt_level; 655 optname = sopt->sopt_name; 656 657 family = so->so_proto->pr_domain->dom_family; 658 659 s = splsoftnet(); 660 switch (family) { 661 #ifdef INET 662 case PF_INET: 663 inp = sotoinpcb(so); 664 #ifdef INET6 665 in6p = NULL; 666 #endif 667 break; 668 #endif 669 #ifdef INET6 670 case PF_INET6: 671 inp = NULL; 672 in6p = sotoin6pcb(so); 673 break; 674 #endif 675 default: 676 splx(s); 677 panic("%s: af %d", __func__, family); 678 } 679 #ifndef INET6 680 if (inp == NULL) 681 #else 682 if (inp == NULL && in6p == NULL) 683 #endif 684 { 685 splx(s); 686 return (ECONNRESET); 687 } 688 if (level != IPPROTO_TCP) { 689 switch (family) { 690 #ifdef INET 691 case PF_INET: 692 error = ip_ctloutput(op, so, sopt); 693 break; 694 #endif 695 #ifdef INET6 696 case PF_INET6: 697 error = ip6_ctloutput(op, so, sopt); 698 break; 699 #endif 700 } 701 splx(s); 702 return (error); 703 } 704 if (inp) 705 tp = intotcpcb(inp); 706 #ifdef INET6 707 else if (in6p) 708 tp = in6totcpcb(in6p); 709 #endif 710 else 711 tp = NULL; 712 713 switch (op) { 714 case PRCO_SETOPT: 715 switch (optname) { 716 #ifdef TCP_SIGNATURE 717 case TCP_MD5SIG: 718 error = sockopt_getint(sopt, &optval); 719 if (error) 720 break; 721 if (optval > 0) 722 tp->t_flags |= TF_SIGNATURE; 723 else 724 tp->t_flags &= ~TF_SIGNATURE; 725 break; 726 #endif /* TCP_SIGNATURE */ 727 728 case TCP_NODELAY: 729 error = sockopt_getint(sopt, &optval); 730 if (error) 731 break; 732 if (optval) 733 tp->t_flags |= TF_NODELAY; 734 else 735 tp->t_flags &= ~TF_NODELAY; 736 break; 737 738 case TCP_MAXSEG: 739 error = sockopt_getint(sopt, &optval); 740 if (error) 741 break; 742 if (optval > 0 && optval <= tp->t_peermss) 743 tp->t_peermss = optval; /* limit on send size */ 744 else 745 error = EINVAL; 746 break; 747 #ifdef notyet 748 case TCP_CONGCTL: 749 /* XXX string overflow XXX */ 750 error = tcp_congctl_select(tp, sopt->sopt_data); 751 break; 752 #endif 753 754 case TCP_KEEPIDLE: 755 error = sockopt_get(sopt, &ui, sizeof(ui)); 756 if (error) 757 break; 758 if (ui > 0) { 759 tp->t_keepidle = ui; 760 change_keepalive(so, tp); 761 } else 762 error = EINVAL; 763 break; 764 765 case TCP_KEEPINTVL: 766 error = sockopt_get(sopt, &ui, sizeof(ui)); 767 if (error) 768 break; 769 if (ui > 0) { 770 tp->t_keepintvl = ui; 771 change_keepalive(so, tp); 772 } else 773 error = EINVAL; 774 break; 775 776 case TCP_KEEPCNT: 777 error = sockopt_get(sopt, &ui, sizeof(ui)); 778 if (error) 779 break; 780 if (ui > 0) { 781 tp->t_keepcnt = ui; 782 change_keepalive(so, tp); 783 } else 784 error = EINVAL; 785 break; 786 787 case TCP_KEEPINIT: 788 error = sockopt_get(sopt, &ui, sizeof(ui)); 789 if (error) 790 break; 791 if (ui > 0) { 792 tp->t_keepinit = ui; 793 change_keepalive(so, tp); 794 } else 795 error = EINVAL; 796 break; 797 798 default: 799 error = ENOPROTOOPT; 800 break; 801 } 802 break; 803 804 case PRCO_GETOPT: 805 switch (optname) { 806 #ifdef TCP_SIGNATURE 807 case TCP_MD5SIG: 808 optval = (tp->t_flags & TF_SIGNATURE) ? 1 : 0; 809 error = sockopt_set(sopt, &optval, sizeof(optval)); 810 break; 811 #endif 812 case TCP_NODELAY: 813 optval = tp->t_flags & TF_NODELAY; 814 error = sockopt_set(sopt, &optval, sizeof(optval)); 815 break; 816 case TCP_MAXSEG: 817 optval = tp->t_peermss; 818 error = sockopt_set(sopt, &optval, sizeof(optval)); 819 break; 820 #ifdef notyet 821 case TCP_CONGCTL: 822 break; 823 #endif 824 default: 825 error = ENOPROTOOPT; 826 break; 827 } 828 break; 829 } 830 splx(s); 831 return (error); 832 } 833 834 #ifndef TCP_SENDSPACE 835 #define TCP_SENDSPACE 1024*32 836 #endif 837 int tcp_sendspace = TCP_SENDSPACE; 838 #ifndef TCP_RECVSPACE 839 #define TCP_RECVSPACE 1024*32 840 #endif 841 int tcp_recvspace = TCP_RECVSPACE; 842 843 /* 844 * Attach TCP protocol to socket, allocating 845 * internet protocol control block, tcp control block, 846 * bufer space, and entering LISTEN state if to accept connections. 847 */ 848 int 849 tcp_attach(struct socket *so) 850 { 851 struct tcpcb *tp; 852 struct inpcb *inp; 853 #ifdef INET6 854 struct in6pcb *in6p; 855 #endif 856 int error; 857 int family; /* family of the socket */ 858 859 family = so->so_proto->pr_domain->dom_family; 860 861 #ifdef MBUFTRACE 862 so->so_mowner = &tcp_sock_mowner; 863 so->so_rcv.sb_mowner = &tcp_sock_rx_mowner; 864 so->so_snd.sb_mowner = &tcp_sock_tx_mowner; 865 #endif 866 if (so->so_snd.sb_hiwat == 0 || so->so_rcv.sb_hiwat == 0) { 867 error = soreserve(so, tcp_sendspace, tcp_recvspace); 868 if (error) 869 return (error); 870 } 871 872 so->so_rcv.sb_flags |= SB_AUTOSIZE; 873 so->so_snd.sb_flags |= SB_AUTOSIZE; 874 875 switch (family) { 876 #ifdef INET 877 case PF_INET: 878 error = in_pcballoc(so, &tcbtable); 879 if (error) 880 return (error); 881 inp = sotoinpcb(so); 882 #ifdef INET6 883 in6p = NULL; 884 #endif 885 break; 886 #endif 887 #ifdef INET6 888 case PF_INET6: 889 error = in6_pcballoc(so, &tcbtable); 890 if (error) 891 return (error); 892 inp = NULL; 893 in6p = sotoin6pcb(so); 894 break; 895 #endif 896 default: 897 return EAFNOSUPPORT; 898 } 899 if (inp) 900 tp = tcp_newtcpcb(family, (void *)inp); 901 #ifdef INET6 902 else if (in6p) 903 tp = tcp_newtcpcb(family, (void *)in6p); 904 #endif 905 else 906 tp = NULL; 907 908 if (tp == 0) { 909 int nofd = so->so_state & SS_NOFDREF; /* XXX */ 910 911 so->so_state &= ~SS_NOFDREF; /* don't free the socket yet */ 912 #ifdef INET 913 if (inp) 914 in_pcbdetach(inp); 915 #endif 916 #ifdef INET6 917 if (in6p) 918 in6_pcbdetach(in6p); 919 #endif 920 so->so_state |= nofd; 921 return (ENOBUFS); 922 } 923 tp->t_state = TCPS_CLOSED; 924 return (0); 925 } 926 927 /* 928 * Initiate (or continue) disconnect. 929 * If embryonic state, just send reset (once). 930 * If in ``let data drain'' option and linger null, just drop. 931 * Otherwise (hard), mark socket disconnecting and drop 932 * current input data; switch states based on user close, and 933 * send segment to peer (with FIN). 934 */ 935 struct tcpcb * 936 tcp_disconnect(struct tcpcb *tp) 937 { 938 struct socket *so; 939 940 if (tp->t_inpcb) 941 so = tp->t_inpcb->inp_socket; 942 #ifdef INET6 943 else if (tp->t_in6pcb) 944 so = tp->t_in6pcb->in6p_socket; 945 #endif 946 else 947 so = NULL; 948 949 if (TCPS_HAVEESTABLISHED(tp->t_state) == 0) 950 tp = tcp_close(tp); 951 else if ((so->so_options & SO_LINGER) && so->so_linger == 0) 952 tp = tcp_drop(tp, 0); 953 else { 954 soisdisconnecting(so); 955 sbflush(&so->so_rcv); 956 tp = tcp_usrclosed(tp); 957 if (tp) 958 (void) tcp_output(tp); 959 } 960 return (tp); 961 } 962 963 /* 964 * User issued close, and wish to trail through shutdown states: 965 * if never received SYN, just forget it. If got a SYN from peer, 966 * but haven't sent FIN, then go to FIN_WAIT_1 state to send peer a FIN. 967 * If already got a FIN from peer, then almost done; go to LAST_ACK 968 * state. In all other cases, have already sent FIN to peer (e.g. 969 * after PRU_SHUTDOWN), and just have to play tedious game waiting 970 * for peer to send FIN or not respond to keep-alives, etc. 971 * We can let the user exit from the close as soon as the FIN is acked. 972 */ 973 struct tcpcb * 974 tcp_usrclosed(struct tcpcb *tp) 975 { 976 977 switch (tp->t_state) { 978 979 case TCPS_CLOSED: 980 case TCPS_LISTEN: 981 case TCPS_SYN_SENT: 982 tp->t_state = TCPS_CLOSED; 983 tp = tcp_close(tp); 984 break; 985 986 case TCPS_SYN_RECEIVED: 987 case TCPS_ESTABLISHED: 988 tp->t_state = TCPS_FIN_WAIT_1; 989 break; 990 991 case TCPS_CLOSE_WAIT: 992 tp->t_state = TCPS_LAST_ACK; 993 break; 994 } 995 if (tp && tp->t_state >= TCPS_FIN_WAIT_2) { 996 struct socket *so; 997 if (tp->t_inpcb) 998 so = tp->t_inpcb->inp_socket; 999 #ifdef INET6 1000 else if (tp->t_in6pcb) 1001 so = tp->t_in6pcb->in6p_socket; 1002 #endif 1003 else 1004 so = NULL; 1005 if (so) 1006 soisdisconnected(so); 1007 /* 1008 * If we are in FIN_WAIT_2, we arrived here because the 1009 * application did a shutdown of the send side. Like the 1010 * case of a transition from FIN_WAIT_1 to FIN_WAIT_2 after 1011 * a full close, we start a timer to make sure sockets are 1012 * not left in FIN_WAIT_2 forever. 1013 */ 1014 if ((tp->t_state == TCPS_FIN_WAIT_2) && (tp->t_maxidle > 0)) 1015 TCP_TIMER_ARM(tp, TCPT_2MSL, tp->t_maxidle); 1016 } 1017 return (tp); 1018 } 1019 1020 /* 1021 * sysctl helper routine for net.inet.ip.mssdflt. it can't be less 1022 * than 32. 1023 */ 1024 static int 1025 sysctl_net_inet_tcp_mssdflt(SYSCTLFN_ARGS) 1026 { 1027 int error, mssdflt; 1028 struct sysctlnode node; 1029 1030 mssdflt = tcp_mssdflt; 1031 node = *rnode; 1032 node.sysctl_data = &mssdflt; 1033 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1034 if (error || newp == NULL) 1035 return (error); 1036 1037 if (mssdflt < 32) 1038 return (EINVAL); 1039 tcp_mssdflt = mssdflt; 1040 1041 return (0); 1042 } 1043 1044 /* 1045 * sysctl helper routine for setting port related values under 1046 * net.inet.ip and net.inet6.ip6. does basic range checking and does 1047 * additional checks for each type. this code has placed in 1048 * tcp_input.c since INET and INET6 both use the same tcp code. 1049 * 1050 * this helper is not static so that both inet and inet6 can use it. 1051 */ 1052 int 1053 sysctl_net_inet_ip_ports(SYSCTLFN_ARGS) 1054 { 1055 int error, tmp; 1056 int apmin, apmax; 1057 #ifndef IPNOPRIVPORTS 1058 int lpmin, lpmax; 1059 #endif /* IPNOPRIVPORTS */ 1060 struct sysctlnode node; 1061 1062 if (namelen != 0) 1063 return (EINVAL); 1064 1065 switch (name[-3]) { 1066 #ifdef INET 1067 case PF_INET: 1068 apmin = anonportmin; 1069 apmax = anonportmax; 1070 #ifndef IPNOPRIVPORTS 1071 lpmin = lowportmin; 1072 lpmax = lowportmax; 1073 #endif /* IPNOPRIVPORTS */ 1074 break; 1075 #endif /* INET */ 1076 #ifdef INET6 1077 case PF_INET6: 1078 apmin = ip6_anonportmin; 1079 apmax = ip6_anonportmax; 1080 #ifndef IPNOPRIVPORTS 1081 lpmin = ip6_lowportmin; 1082 lpmax = ip6_lowportmax; 1083 #endif /* IPNOPRIVPORTS */ 1084 break; 1085 #endif /* INET6 */ 1086 default: 1087 return (EINVAL); 1088 } 1089 1090 /* 1091 * insert temporary copy into node, perform lookup on 1092 * temporary, then restore pointer 1093 */ 1094 node = *rnode; 1095 tmp = *(int*)rnode->sysctl_data; 1096 node.sysctl_data = &tmp; 1097 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1098 if (error || newp == NULL) 1099 return (error); 1100 1101 /* 1102 * simple port range check 1103 */ 1104 if (tmp < 0 || tmp > 65535) 1105 return (EINVAL); 1106 1107 /* 1108 * per-node range checks 1109 */ 1110 switch (rnode->sysctl_num) { 1111 case IPCTL_ANONPORTMIN: 1112 if (tmp >= apmax) 1113 return (EINVAL); 1114 #ifndef IPNOPRIVPORTS 1115 if (tmp < IPPORT_RESERVED) 1116 return (EINVAL); 1117 #endif /* IPNOPRIVPORTS */ 1118 break; 1119 1120 case IPCTL_ANONPORTMAX: 1121 if (apmin >= tmp) 1122 return (EINVAL); 1123 #ifndef IPNOPRIVPORTS 1124 if (tmp < IPPORT_RESERVED) 1125 return (EINVAL); 1126 #endif /* IPNOPRIVPORTS */ 1127 break; 1128 1129 #ifndef IPNOPRIVPORTS 1130 case IPCTL_LOWPORTMIN: 1131 if (tmp >= lpmax || 1132 tmp > IPPORT_RESERVEDMAX || 1133 tmp < IPPORT_RESERVEDMIN) 1134 return (EINVAL); 1135 break; 1136 1137 case IPCTL_LOWPORTMAX: 1138 if (lpmin >= tmp || 1139 tmp > IPPORT_RESERVEDMAX || 1140 tmp < IPPORT_RESERVEDMIN) 1141 return (EINVAL); 1142 break; 1143 #endif /* IPNOPRIVPORTS */ 1144 1145 default: 1146 return (EINVAL); 1147 } 1148 1149 *(int*)rnode->sysctl_data = tmp; 1150 1151 return (0); 1152 } 1153 1154 /* 1155 * The superuser can drop any connection. Normal users can only drop 1156 * their own connections. 1157 */ 1158 static inline int 1159 check_sockuid(struct socket *sockp, kauth_cred_t cred) 1160 { 1161 uid_t sockuid; 1162 1163 sockuid = sockp->so_uidinfo->ui_uid; 1164 if (kauth_authorize_generic(cred, KAUTH_GENERIC_ISSUSER, NULL) == 0 || 1165 sockuid == kauth_cred_getuid(cred) || 1166 sockuid == kauth_cred_geteuid(cred)) 1167 return 0; 1168 return EACCES; 1169 } 1170 1171 static inline int 1172 copyout_uid(struct socket *sockp, void *oldp, size_t *oldlenp) 1173 { 1174 size_t sz; 1175 int error; 1176 uid_t uid; 1177 1178 uid = sockp->so_uidinfo->ui_uid; 1179 if (oldp) { 1180 sz = MIN(sizeof(uid), *oldlenp); 1181 error = copyout(&uid, oldp, sz); 1182 if (error) 1183 return error; 1184 } 1185 *oldlenp = sizeof(uid); 1186 return 0; 1187 } 1188 1189 static inline int 1190 inet4_ident_core(struct in_addr raddr, u_int rport, 1191 struct in_addr laddr, u_int lport, 1192 void *oldp, size_t *oldlenp, 1193 struct lwp *l, int dodrop) 1194 { 1195 struct inpcb *inp; 1196 struct socket *sockp; 1197 1198 inp = in_pcblookup_connect(&tcbtable, raddr, rport, laddr, lport); 1199 1200 if (inp == NULL || (sockp = inp->inp_socket) == NULL) 1201 return ESRCH; 1202 1203 if (dodrop) { 1204 struct tcpcb *tp; 1205 1206 if (inp == NULL || (tp = intotcpcb(inp)) == NULL || 1207 (inp->inp_socket->so_options & SO_ACCEPTCONN) != 0) 1208 return ESRCH; 1209 1210 if (check_sockuid(inp->inp_socket, l->l_cred) != 0) 1211 return EACCES; 1212 1213 (void)tcp_drop(tp, ECONNABORTED); 1214 return 0; 1215 } 1216 else 1217 return copyout_uid(sockp, oldp, oldlenp); 1218 } 1219 1220 #ifdef INET6 1221 static inline int 1222 inet6_ident_core(struct in6_addr *raddr, u_int rport, 1223 struct in6_addr *laddr, u_int lport, 1224 void *oldp, size_t *oldlenp, 1225 struct lwp *l, int dodrop) 1226 { 1227 struct in6pcb *in6p; 1228 struct socket *sockp; 1229 1230 in6p = in6_pcblookup_connect(&tcbtable, raddr, rport, laddr, lport, 0); 1231 1232 if (in6p == NULL || (sockp = in6p->in6p_socket) == NULL) 1233 return ESRCH; 1234 1235 if (dodrop) { 1236 struct tcpcb *tp; 1237 1238 if (in6p == NULL || (tp = in6totcpcb(in6p)) == NULL || 1239 (in6p->in6p_socket->so_options & SO_ACCEPTCONN) != 0) 1240 return ESRCH; 1241 1242 if (check_sockuid(in6p->in6p_socket, l->l_cred) != 0) 1243 return EACCES; 1244 1245 (void)tcp_drop(tp, ECONNABORTED); 1246 return 0; 1247 } 1248 else 1249 return copyout_uid(sockp, oldp, oldlenp); 1250 } 1251 #endif 1252 1253 /* 1254 * sysctl helper routine for the net.inet.tcp.drop and 1255 * net.inet6.tcp6.drop nodes. 1256 */ 1257 #define sysctl_net_inet_tcp_drop sysctl_net_inet_tcp_ident 1258 1259 /* 1260 * sysctl helper routine for the net.inet.tcp.ident and 1261 * net.inet6.tcp6.ident nodes. contains backwards compat code for the 1262 * old way of looking up the ident information for ipv4 which involves 1263 * stuffing the port/addr pairs into the mib lookup. 1264 */ 1265 static int 1266 sysctl_net_inet_tcp_ident(SYSCTLFN_ARGS) 1267 { 1268 #ifdef INET 1269 struct sockaddr_in *si4[2]; 1270 #endif /* INET */ 1271 #ifdef INET6 1272 struct sockaddr_in6 *si6[2]; 1273 #endif /* INET6 */ 1274 struct sockaddr_storage sa[2]; 1275 int error, pf, dodrop; 1276 1277 dodrop = name[-1] == TCPCTL_DROP; 1278 if (dodrop) { 1279 if (oldp != NULL || *oldlenp != 0) 1280 return EINVAL; 1281 if (newp == NULL) 1282 return EPERM; 1283 if (newlen < sizeof(sa)) 1284 return ENOMEM; 1285 } 1286 if (namelen != 4 && namelen != 0) 1287 return EINVAL; 1288 if (name[-2] != IPPROTO_TCP) 1289 return EINVAL; 1290 pf = name[-3]; 1291 1292 /* old style lookup, ipv4 only */ 1293 if (namelen == 4) { 1294 #ifdef INET 1295 struct in_addr laddr, raddr; 1296 u_int lport, rport; 1297 1298 if (pf != PF_INET) 1299 return EPROTONOSUPPORT; 1300 raddr.s_addr = (uint32_t)name[0]; 1301 rport = (u_int)name[1]; 1302 laddr.s_addr = (uint32_t)name[2]; 1303 lport = (u_int)name[3]; 1304 1305 mutex_enter(softnet_lock); 1306 error = inet4_ident_core(raddr, rport, laddr, lport, 1307 oldp, oldlenp, l, dodrop); 1308 mutex_exit(softnet_lock); 1309 return error; 1310 #else /* INET */ 1311 return EINVAL; 1312 #endif /* INET */ 1313 } 1314 1315 if (newp == NULL || newlen != sizeof(sa)) 1316 return EINVAL; 1317 error = copyin(newp, &sa, newlen); 1318 if (error) 1319 return error; 1320 1321 /* 1322 * requested families must match 1323 */ 1324 if (pf != sa[0].ss_family || sa[0].ss_family != sa[1].ss_family) 1325 return EINVAL; 1326 1327 switch (pf) { 1328 #ifdef INET6 1329 case PF_INET6: 1330 si6[0] = (struct sockaddr_in6*)&sa[0]; 1331 si6[1] = (struct sockaddr_in6*)&sa[1]; 1332 if (si6[0]->sin6_len != sizeof(*si6[0]) || 1333 si6[1]->sin6_len != sizeof(*si6[1])) 1334 return EINVAL; 1335 1336 if (!IN6_IS_ADDR_V4MAPPED(&si6[0]->sin6_addr) && 1337 !IN6_IS_ADDR_V4MAPPED(&si6[1]->sin6_addr)) { 1338 error = sa6_embedscope(si6[0], ip6_use_defzone); 1339 if (error) 1340 return error; 1341 error = sa6_embedscope(si6[1], ip6_use_defzone); 1342 if (error) 1343 return error; 1344 1345 mutex_enter(softnet_lock); 1346 error = inet6_ident_core(&si6[0]->sin6_addr, 1347 si6[0]->sin6_port, &si6[1]->sin6_addr, 1348 si6[1]->sin6_port, oldp, oldlenp, l, dodrop); 1349 mutex_exit(softnet_lock); 1350 return error; 1351 } 1352 1353 if (IN6_IS_ADDR_V4MAPPED(&si6[0]->sin6_addr) != 1354 IN6_IS_ADDR_V4MAPPED(&si6[1]->sin6_addr)) 1355 return EINVAL; 1356 1357 in6_sin6_2_sin_in_sock((struct sockaddr *)&sa[0]); 1358 in6_sin6_2_sin_in_sock((struct sockaddr *)&sa[1]); 1359 /*FALLTHROUGH*/ 1360 #endif /* INET6 */ 1361 #ifdef INET 1362 case PF_INET: 1363 si4[0] = (struct sockaddr_in*)&sa[0]; 1364 si4[1] = (struct sockaddr_in*)&sa[1]; 1365 if (si4[0]->sin_len != sizeof(*si4[0]) || 1366 si4[0]->sin_len != sizeof(*si4[1])) 1367 return EINVAL; 1368 1369 mutex_enter(softnet_lock); 1370 error = inet4_ident_core(si4[0]->sin_addr, si4[0]->sin_port, 1371 si4[1]->sin_addr, si4[1]->sin_port, 1372 oldp, oldlenp, l, dodrop); 1373 mutex_exit(softnet_lock); 1374 return error; 1375 #endif /* INET */ 1376 default: 1377 return EPROTONOSUPPORT; 1378 } 1379 } 1380 1381 /* 1382 * sysctl helper for the inet and inet6 pcblists. handles tcp/udp and 1383 * inet/inet6, as well as raw pcbs for each. specifically not 1384 * declared static so that raw sockets and udp/udp6 can use it as 1385 * well. 1386 */ 1387 int 1388 sysctl_inpcblist(SYSCTLFN_ARGS) 1389 { 1390 #ifdef INET 1391 struct sockaddr_in *in; 1392 const struct inpcb *inp; 1393 #endif 1394 #ifdef INET6 1395 struct sockaddr_in6 *in6; 1396 const struct in6pcb *in6p; 1397 #endif 1398 /* 1399 * sysctl_data is const, but CIRCLEQ_FOREACH can't use a const 1400 * struct inpcbtable pointer, so we have to discard const. :-/ 1401 */ 1402 struct inpcbtable *pcbtbl = __UNCONST(rnode->sysctl_data); 1403 const struct inpcb_hdr *inph; 1404 struct tcpcb *tp; 1405 struct kinfo_pcb pcb; 1406 char *dp; 1407 u_int op, arg; 1408 size_t len, needed, elem_size, out_size; 1409 int error, elem_count, pf, proto, pf2; 1410 1411 if (namelen != 4) 1412 return (EINVAL); 1413 1414 if (oldp != NULL) { 1415 len = *oldlenp; 1416 elem_size = name[2]; 1417 elem_count = name[3]; 1418 if (elem_size != sizeof(pcb)) 1419 return EINVAL; 1420 } else { 1421 len = 0; 1422 elem_count = INT_MAX; 1423 elem_size = sizeof(pcb); 1424 } 1425 error = 0; 1426 dp = oldp; 1427 op = name[0]; 1428 arg = name[1]; 1429 out_size = elem_size; 1430 needed = 0; 1431 1432 if (namelen == 1 && name[0] == CTL_QUERY) 1433 return (sysctl_query(SYSCTLFN_CALL(rnode))); 1434 1435 if (name - oname != 4) 1436 return (EINVAL); 1437 1438 pf = oname[1]; 1439 proto = oname[2]; 1440 pf2 = (oldp != NULL) ? pf : 0; 1441 1442 mutex_enter(softnet_lock); 1443 1444 CIRCLEQ_FOREACH(inph, &pcbtbl->inpt_queue, inph_queue) { 1445 #ifdef INET 1446 inp = (const struct inpcb *)inph; 1447 #endif 1448 #ifdef INET6 1449 in6p = (const struct in6pcb *)inph; 1450 #endif 1451 1452 if (inph->inph_af != pf) 1453 continue; 1454 1455 if (kauth_authorize_network(l->l_cred, KAUTH_NETWORK_SOCKET, 1456 KAUTH_REQ_NETWORK_SOCKET_CANSEE, inph->inph_socket, NULL, 1457 NULL) != 0) 1458 continue; 1459 1460 memset(&pcb, 0, sizeof(pcb)); 1461 1462 pcb.ki_family = pf; 1463 pcb.ki_type = proto; 1464 1465 switch (pf2) { 1466 case 0: 1467 /* just probing for size */ 1468 break; 1469 #ifdef INET 1470 case PF_INET: 1471 pcb.ki_family = inp->inp_socket->so_proto-> 1472 pr_domain->dom_family; 1473 pcb.ki_type = inp->inp_socket->so_proto-> 1474 pr_type; 1475 pcb.ki_protocol = inp->inp_socket->so_proto-> 1476 pr_protocol; 1477 pcb.ki_pflags = inp->inp_flags; 1478 1479 pcb.ki_sostate = inp->inp_socket->so_state; 1480 pcb.ki_prstate = inp->inp_state; 1481 if (proto == IPPROTO_TCP) { 1482 tp = intotcpcb(inp); 1483 pcb.ki_tstate = tp->t_state; 1484 pcb.ki_tflags = tp->t_flags; 1485 } 1486 1487 pcb.ki_pcbaddr = PTRTOUINT64(inp); 1488 pcb.ki_ppcbaddr = PTRTOUINT64(inp->inp_ppcb); 1489 pcb.ki_sockaddr = PTRTOUINT64(inp->inp_socket); 1490 1491 pcb.ki_rcvq = inp->inp_socket->so_rcv.sb_cc; 1492 pcb.ki_sndq = inp->inp_socket->so_snd.sb_cc; 1493 1494 in = satosin(&pcb.ki_src); 1495 in->sin_len = sizeof(*in); 1496 in->sin_family = pf; 1497 in->sin_port = inp->inp_lport; 1498 in->sin_addr = inp->inp_laddr; 1499 if (pcb.ki_prstate >= INP_CONNECTED) { 1500 in = satosin(&pcb.ki_dst); 1501 in->sin_len = sizeof(*in); 1502 in->sin_family = pf; 1503 in->sin_port = inp->inp_fport; 1504 in->sin_addr = inp->inp_faddr; 1505 } 1506 break; 1507 #endif 1508 #ifdef INET6 1509 case PF_INET6: 1510 pcb.ki_family = in6p->in6p_socket->so_proto-> 1511 pr_domain->dom_family; 1512 pcb.ki_type = in6p->in6p_socket->so_proto->pr_type; 1513 pcb.ki_protocol = in6p->in6p_socket->so_proto-> 1514 pr_protocol; 1515 pcb.ki_pflags = in6p->in6p_flags; 1516 1517 pcb.ki_sostate = in6p->in6p_socket->so_state; 1518 pcb.ki_prstate = in6p->in6p_state; 1519 if (proto == IPPROTO_TCP) { 1520 tp = in6totcpcb(in6p); 1521 pcb.ki_tstate = tp->t_state; 1522 pcb.ki_tflags = tp->t_flags; 1523 } 1524 1525 pcb.ki_pcbaddr = PTRTOUINT64(in6p); 1526 pcb.ki_ppcbaddr = PTRTOUINT64(in6p->in6p_ppcb); 1527 pcb.ki_sockaddr = PTRTOUINT64(in6p->in6p_socket); 1528 1529 pcb.ki_rcvq = in6p->in6p_socket->so_rcv.sb_cc; 1530 pcb.ki_sndq = in6p->in6p_socket->so_snd.sb_cc; 1531 1532 in6 = satosin6(&pcb.ki_src); 1533 in6->sin6_len = sizeof(*in6); 1534 in6->sin6_family = pf; 1535 in6->sin6_port = in6p->in6p_lport; 1536 in6->sin6_flowinfo = in6p->in6p_flowinfo; 1537 in6->sin6_addr = in6p->in6p_laddr; 1538 in6->sin6_scope_id = 0; /* XXX? */ 1539 1540 if (pcb.ki_prstate >= IN6P_CONNECTED) { 1541 in6 = satosin6(&pcb.ki_dst); 1542 in6->sin6_len = sizeof(*in6); 1543 in6->sin6_family = pf; 1544 in6->sin6_port = in6p->in6p_fport; 1545 in6->sin6_flowinfo = in6p->in6p_flowinfo; 1546 in6->sin6_addr = in6p->in6p_faddr; 1547 in6->sin6_scope_id = 0; /* XXX? */ 1548 } 1549 break; 1550 #endif 1551 } 1552 1553 if (len >= elem_size && elem_count > 0) { 1554 error = copyout(&pcb, dp, out_size); 1555 if (error) 1556 return (error); 1557 dp += elem_size; 1558 len -= elem_size; 1559 } 1560 if (elem_count > 0) { 1561 needed += elem_size; 1562 if (elem_count != INT_MAX) 1563 elem_count--; 1564 } 1565 } 1566 1567 *oldlenp = needed; 1568 if (oldp == NULL) 1569 *oldlenp += PCB_SLOP * sizeof(struct kinfo_pcb); 1570 1571 mutex_exit(softnet_lock); 1572 1573 return (error); 1574 } 1575 1576 static int 1577 sysctl_tcp_congctl(SYSCTLFN_ARGS) 1578 { 1579 struct sysctlnode node; 1580 int error; 1581 char newname[TCPCC_MAXLEN]; 1582 1583 strlcpy(newname, tcp_congctl_global_name, sizeof(newname) - 1); 1584 1585 node = *rnode; 1586 node.sysctl_data = newname; 1587 node.sysctl_size = sizeof(newname); 1588 1589 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1590 1591 if (error || 1592 newp == NULL || 1593 strncmp(newname, tcp_congctl_global_name, sizeof(newname)) == 0) 1594 return error; 1595 1596 mutex_enter(softnet_lock); 1597 error = tcp_congctl_select(NULL, newname); 1598 mutex_exit(softnet_lock); 1599 1600 return error; 1601 } 1602 1603 static int 1604 sysctl_tcp_keep(SYSCTLFN_ARGS) 1605 { 1606 int error; 1607 u_int tmp; 1608 struct sysctlnode node; 1609 1610 node = *rnode; 1611 tmp = *(u_int *)rnode->sysctl_data; 1612 node.sysctl_data = &tmp; 1613 1614 error = sysctl_lookup(SYSCTLFN_CALL(&node)); 1615 if (error || newp == NULL) 1616 return error; 1617 1618 mutex_enter(softnet_lock); 1619 1620 *(u_int *)rnode->sysctl_data = tmp; 1621 tcp_tcpcb_template(); /* update the template */ 1622 1623 mutex_exit(softnet_lock); 1624 return 0; 1625 } 1626 1627 static int 1628 sysctl_net_inet_tcp_stats(SYSCTLFN_ARGS) 1629 { 1630 1631 return (NETSTAT_SYSCTL(tcpstat_percpu, TCP_NSTATS)); 1632 } 1633 1634 /* 1635 * this (second stage) setup routine is a replacement for tcp_sysctl() 1636 * (which is currently used for ipv4 and ipv6) 1637 */ 1638 static void 1639 sysctl_net_inet_tcp_setup2(struct sysctllog **clog, int pf, const char *pfname, 1640 const char *tcpname) 1641 { 1642 const struct sysctlnode *sack_node; 1643 const struct sysctlnode *abc_node; 1644 const struct sysctlnode *ecn_node; 1645 const struct sysctlnode *congctl_node; 1646 #ifdef TCP_DEBUG 1647 extern struct tcp_debug tcp_debug[TCP_NDEBUG]; 1648 extern int tcp_debx; 1649 #endif 1650 1651 sysctl_createv(clog, 0, NULL, NULL, 1652 CTLFLAG_PERMANENT, 1653 CTLTYPE_NODE, "net", NULL, 1654 NULL, 0, NULL, 0, 1655 CTL_NET, CTL_EOL); 1656 sysctl_createv(clog, 0, NULL, NULL, 1657 CTLFLAG_PERMANENT, 1658 CTLTYPE_NODE, pfname, NULL, 1659 NULL, 0, NULL, 0, 1660 CTL_NET, pf, CTL_EOL); 1661 sysctl_createv(clog, 0, NULL, NULL, 1662 CTLFLAG_PERMANENT, 1663 CTLTYPE_NODE, tcpname, 1664 SYSCTL_DESCR("TCP related settings"), 1665 NULL, 0, NULL, 0, 1666 CTL_NET, pf, IPPROTO_TCP, CTL_EOL); 1667 1668 sysctl_createv(clog, 0, NULL, NULL, 1669 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1670 CTLTYPE_INT, "rfc1323", 1671 SYSCTL_DESCR("Enable RFC1323 TCP extensions"), 1672 NULL, 0, &tcp_do_rfc1323, 0, 1673 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RFC1323, CTL_EOL); 1674 sysctl_createv(clog, 0, NULL, NULL, 1675 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1676 CTLTYPE_INT, "sendspace", 1677 SYSCTL_DESCR("Default TCP send buffer size"), 1678 NULL, 0, &tcp_sendspace, 0, 1679 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SENDSPACE, CTL_EOL); 1680 sysctl_createv(clog, 0, NULL, NULL, 1681 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1682 CTLTYPE_INT, "recvspace", 1683 SYSCTL_DESCR("Default TCP receive buffer size"), 1684 NULL, 0, &tcp_recvspace, 0, 1685 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RECVSPACE, CTL_EOL); 1686 sysctl_createv(clog, 0, NULL, NULL, 1687 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1688 CTLTYPE_INT, "mssdflt", 1689 SYSCTL_DESCR("Default maximum segment size"), 1690 sysctl_net_inet_tcp_mssdflt, 0, &tcp_mssdflt, 0, 1691 CTL_NET, pf, IPPROTO_TCP, TCPCTL_MSSDFLT, CTL_EOL); 1692 sysctl_createv(clog, 0, NULL, NULL, 1693 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1694 CTLTYPE_INT, "minmss", 1695 SYSCTL_DESCR("Lower limit for TCP maximum segment size"), 1696 NULL, 0, &tcp_minmss, 0, 1697 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1698 sysctl_createv(clog, 0, NULL, NULL, 1699 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1700 CTLTYPE_INT, "syn_cache_limit", 1701 SYSCTL_DESCR("Maximum number of entries in the TCP " 1702 "compressed state engine"), 1703 NULL, 0, &tcp_syn_cache_limit, 0, 1704 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_CACHE_LIMIT, 1705 CTL_EOL); 1706 sysctl_createv(clog, 0, NULL, NULL, 1707 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1708 CTLTYPE_INT, "syn_bucket_limit", 1709 SYSCTL_DESCR("Maximum number of entries per hash " 1710 "bucket in the TCP compressed state " 1711 "engine"), 1712 NULL, 0, &tcp_syn_bucket_limit, 0, 1713 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_BUCKET_LIMIT, 1714 CTL_EOL); 1715 #if 0 /* obsoleted */ 1716 sysctl_createv(clog, 0, NULL, NULL, 1717 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1718 CTLTYPE_INT, "syn_cache_interval", 1719 SYSCTL_DESCR("TCP compressed state engine's timer interval"), 1720 NULL, 0, &tcp_syn_cache_interval, 0, 1721 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SYN_CACHE_INTER, 1722 CTL_EOL); 1723 #endif 1724 sysctl_createv(clog, 0, NULL, NULL, 1725 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1726 CTLTYPE_INT, "init_win", 1727 SYSCTL_DESCR("Initial TCP congestion window"), 1728 NULL, 0, &tcp_init_win, 0, 1729 CTL_NET, pf, IPPROTO_TCP, TCPCTL_INIT_WIN, CTL_EOL); 1730 sysctl_createv(clog, 0, NULL, NULL, 1731 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1732 CTLTYPE_INT, "mss_ifmtu", 1733 SYSCTL_DESCR("Use interface MTU for calculating MSS"), 1734 NULL, 0, &tcp_mss_ifmtu, 0, 1735 CTL_NET, pf, IPPROTO_TCP, TCPCTL_MSS_IFMTU, CTL_EOL); 1736 sysctl_createv(clog, 0, NULL, &sack_node, 1737 CTLFLAG_PERMANENT, 1738 CTLTYPE_NODE, "sack", 1739 SYSCTL_DESCR("RFC2018 Selective ACKnowledgement tunables"), 1740 NULL, 0, NULL, 0, 1741 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_EOL); 1742 1743 /* Congctl subtree */ 1744 sysctl_createv(clog, 0, NULL, &congctl_node, 1745 CTLFLAG_PERMANENT, 1746 CTLTYPE_NODE, "congctl", 1747 SYSCTL_DESCR("TCP Congestion Control"), 1748 NULL, 0, NULL, 0, 1749 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1750 sysctl_createv(clog, 0, &congctl_node, NULL, 1751 CTLFLAG_PERMANENT, 1752 CTLTYPE_STRING, "available", 1753 SYSCTL_DESCR("Available Congestion Control Mechanisms"), 1754 NULL, 0, &tcp_congctl_avail, 0, CTL_CREATE, CTL_EOL); 1755 sysctl_createv(clog, 0, &congctl_node, NULL, 1756 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1757 CTLTYPE_STRING, "selected", 1758 SYSCTL_DESCR("Selected Congestion Control Mechanism"), 1759 sysctl_tcp_congctl, 0, NULL, TCPCC_MAXLEN, 1760 CTL_CREATE, CTL_EOL); 1761 1762 sysctl_createv(clog, 0, NULL, NULL, 1763 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1764 CTLTYPE_INT, "win_scale", 1765 SYSCTL_DESCR("Use RFC1323 window scale options"), 1766 NULL, 0, &tcp_do_win_scale, 0, 1767 CTL_NET, pf, IPPROTO_TCP, TCPCTL_WSCALE, CTL_EOL); 1768 sysctl_createv(clog, 0, NULL, NULL, 1769 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1770 CTLTYPE_INT, "timestamps", 1771 SYSCTL_DESCR("Use RFC1323 time stamp options"), 1772 NULL, 0, &tcp_do_timestamps, 0, 1773 CTL_NET, pf, IPPROTO_TCP, TCPCTL_TSTAMP, CTL_EOL); 1774 sysctl_createv(clog, 0, NULL, NULL, 1775 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1776 CTLTYPE_INT, "compat_42", 1777 SYSCTL_DESCR("Enable workarounds for 4.2BSD TCP bugs"), 1778 NULL, 0, &tcp_compat_42, 0, 1779 CTL_NET, pf, IPPROTO_TCP, TCPCTL_COMPAT_42, CTL_EOL); 1780 sysctl_createv(clog, 0, NULL, NULL, 1781 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1782 CTLTYPE_INT, "cwm", 1783 SYSCTL_DESCR("Hughes/Touch/Heidemann Congestion Window " 1784 "Monitoring"), 1785 NULL, 0, &tcp_cwm, 0, 1786 CTL_NET, pf, IPPROTO_TCP, TCPCTL_CWM, CTL_EOL); 1787 sysctl_createv(clog, 0, NULL, NULL, 1788 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1789 CTLTYPE_INT, "cwm_burstsize", 1790 SYSCTL_DESCR("Congestion Window Monitoring allowed " 1791 "burst count in packets"), 1792 NULL, 0, &tcp_cwm_burstsize, 0, 1793 CTL_NET, pf, IPPROTO_TCP, TCPCTL_CWM_BURSTSIZE, 1794 CTL_EOL); 1795 sysctl_createv(clog, 0, NULL, NULL, 1796 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1797 CTLTYPE_INT, "ack_on_push", 1798 SYSCTL_DESCR("Immediately return ACK when PSH is " 1799 "received"), 1800 NULL, 0, &tcp_ack_on_push, 0, 1801 CTL_NET, pf, IPPROTO_TCP, TCPCTL_ACK_ON_PUSH, CTL_EOL); 1802 sysctl_createv(clog, 0, NULL, NULL, 1803 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1804 CTLTYPE_INT, "keepidle", 1805 SYSCTL_DESCR("Allowed connection idle ticks before a " 1806 "keepalive probe is sent"), 1807 sysctl_tcp_keep, 0, &tcp_keepidle, 0, 1808 CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPIDLE, CTL_EOL); 1809 sysctl_createv(clog, 0, NULL, NULL, 1810 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1811 CTLTYPE_INT, "keepintvl", 1812 SYSCTL_DESCR("Ticks before next keepalive probe is sent"), 1813 sysctl_tcp_keep, 0, &tcp_keepintvl, 0, 1814 CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPINTVL, CTL_EOL); 1815 sysctl_createv(clog, 0, NULL, NULL, 1816 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1817 CTLTYPE_INT, "keepcnt", 1818 SYSCTL_DESCR("Number of keepalive probes to send"), 1819 sysctl_tcp_keep, 0, &tcp_keepcnt, 0, 1820 CTL_NET, pf, IPPROTO_TCP, TCPCTL_KEEPCNT, CTL_EOL); 1821 sysctl_createv(clog, 0, NULL, NULL, 1822 CTLFLAG_PERMANENT|CTLFLAG_IMMEDIATE, 1823 CTLTYPE_INT, "slowhz", 1824 SYSCTL_DESCR("Keepalive ticks per second"), 1825 NULL, PR_SLOWHZ, NULL, 0, 1826 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SLOWHZ, CTL_EOL); 1827 sysctl_createv(clog, 0, NULL, NULL, 1828 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1829 CTLTYPE_INT, "log_refused", 1830 SYSCTL_DESCR("Log refused TCP connections"), 1831 NULL, 0, &tcp_log_refused, 0, 1832 CTL_NET, pf, IPPROTO_TCP, TCPCTL_LOG_REFUSED, CTL_EOL); 1833 #if 0 /* obsoleted */ 1834 sysctl_createv(clog, 0, NULL, NULL, 1835 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1836 CTLTYPE_INT, "rstratelimit", NULL, 1837 NULL, 0, &tcp_rst_ratelim, 0, 1838 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RSTRATELIMIT, CTL_EOL); 1839 #endif 1840 sysctl_createv(clog, 0, NULL, NULL, 1841 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1842 CTLTYPE_INT, "rstppslimit", 1843 SYSCTL_DESCR("Maximum number of RST packets to send " 1844 "per second"), 1845 NULL, 0, &tcp_rst_ppslim, 0, 1846 CTL_NET, pf, IPPROTO_TCP, TCPCTL_RSTPPSLIMIT, CTL_EOL); 1847 sysctl_createv(clog, 0, NULL, NULL, 1848 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1849 CTLTYPE_INT, "delack_ticks", 1850 SYSCTL_DESCR("Number of ticks to delay sending an ACK"), 1851 NULL, 0, &tcp_delack_ticks, 0, 1852 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DELACK_TICKS, CTL_EOL); 1853 sysctl_createv(clog, 0, NULL, NULL, 1854 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1855 CTLTYPE_INT, "init_win_local", 1856 SYSCTL_DESCR("Initial TCP window size (in segments)"), 1857 NULL, 0, &tcp_init_win_local, 0, 1858 CTL_NET, pf, IPPROTO_TCP, TCPCTL_INIT_WIN_LOCAL, 1859 CTL_EOL); 1860 sysctl_createv(clog, 0, NULL, NULL, 1861 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1862 CTLTYPE_STRUCT, "ident", 1863 SYSCTL_DESCR("RFC1413 Identification Protocol lookups"), 1864 sysctl_net_inet_tcp_ident, 0, NULL, sizeof(uid_t), 1865 CTL_NET, pf, IPPROTO_TCP, TCPCTL_IDENT, CTL_EOL); 1866 sysctl_createv(clog, 0, NULL, NULL, 1867 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1868 CTLTYPE_INT, "do_loopback_cksum", 1869 SYSCTL_DESCR("Perform TCP checksum on loopback"), 1870 NULL, 0, &tcp_do_loopback_cksum, 0, 1871 CTL_NET, pf, IPPROTO_TCP, TCPCTL_LOOPBACKCKSUM, 1872 CTL_EOL); 1873 sysctl_createv(clog, 0, NULL, NULL, 1874 CTLFLAG_PERMANENT, 1875 CTLTYPE_STRUCT, "pcblist", 1876 SYSCTL_DESCR("TCP protocol control block list"), 1877 sysctl_inpcblist, 0, &tcbtable, 0, 1878 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, 1879 CTL_EOL); 1880 sysctl_createv(clog, 0, NULL, NULL, 1881 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1882 CTLTYPE_INT, "keepinit", 1883 SYSCTL_DESCR("Ticks before initial tcp connection times out"), 1884 sysctl_tcp_keep, 0, &tcp_keepinit, 0, 1885 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1886 1887 /* TCP socket buffers auto-sizing nodes */ 1888 sysctl_createv(clog, 0, NULL, NULL, 1889 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1890 CTLTYPE_INT, "recvbuf_auto", 1891 SYSCTL_DESCR("Enable automatic receive " 1892 "buffer sizing (experimental)"), 1893 NULL, 0, &tcp_do_autorcvbuf, 0, 1894 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1895 sysctl_createv(clog, 0, NULL, NULL, 1896 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1897 CTLTYPE_INT, "recvbuf_inc", 1898 SYSCTL_DESCR("Incrementor step size of " 1899 "automatic receive buffer"), 1900 NULL, 0, &tcp_autorcvbuf_inc, 0, 1901 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1902 sysctl_createv(clog, 0, NULL, NULL, 1903 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1904 CTLTYPE_INT, "recvbuf_max", 1905 SYSCTL_DESCR("Max size of automatic receive buffer"), 1906 NULL, 0, &tcp_autorcvbuf_max, 0, 1907 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1908 1909 sysctl_createv(clog, 0, NULL, NULL, 1910 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1911 CTLTYPE_INT, "sendbuf_auto", 1912 SYSCTL_DESCR("Enable automatic send " 1913 "buffer sizing (experimental)"), 1914 NULL, 0, &tcp_do_autosndbuf, 0, 1915 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1916 sysctl_createv(clog, 0, NULL, NULL, 1917 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1918 CTLTYPE_INT, "sendbuf_inc", 1919 SYSCTL_DESCR("Incrementor step size of " 1920 "automatic send buffer"), 1921 NULL, 0, &tcp_autosndbuf_inc, 0, 1922 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1923 sysctl_createv(clog, 0, NULL, NULL, 1924 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1925 CTLTYPE_INT, "sendbuf_max", 1926 SYSCTL_DESCR("Max size of automatic send buffer"), 1927 NULL, 0, &tcp_autosndbuf_max, 0, 1928 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1929 1930 /* ECN subtree */ 1931 sysctl_createv(clog, 0, NULL, &ecn_node, 1932 CTLFLAG_PERMANENT, 1933 CTLTYPE_NODE, "ecn", 1934 SYSCTL_DESCR("RFC3168 Explicit Congestion Notification"), 1935 NULL, 0, NULL, 0, 1936 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 1937 sysctl_createv(clog, 0, &ecn_node, NULL, 1938 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1939 CTLTYPE_INT, "enable", 1940 SYSCTL_DESCR("Enable TCP Explicit Congestion " 1941 "Notification"), 1942 NULL, 0, &tcp_do_ecn, 0, CTL_CREATE, CTL_EOL); 1943 sysctl_createv(clog, 0, &ecn_node, NULL, 1944 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1945 CTLTYPE_INT, "maxretries", 1946 SYSCTL_DESCR("Number of times to retry ECN setup " 1947 "before disabling ECN on the connection"), 1948 NULL, 0, &tcp_ecn_maxretries, 0, CTL_CREATE, CTL_EOL); 1949 1950 /* SACK gets it's own little subtree. */ 1951 sysctl_createv(clog, 0, NULL, &sack_node, 1952 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1953 CTLTYPE_INT, "enable", 1954 SYSCTL_DESCR("Enable RFC2018 Selective ACKnowledgement"), 1955 NULL, 0, &tcp_do_sack, 0, 1956 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 1957 sysctl_createv(clog, 0, NULL, &sack_node, 1958 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1959 CTLTYPE_INT, "maxholes", 1960 SYSCTL_DESCR("Maximum number of TCP SACK holes allowed per connection"), 1961 NULL, 0, &tcp_sack_tp_maxholes, 0, 1962 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 1963 sysctl_createv(clog, 0, NULL, &sack_node, 1964 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 1965 CTLTYPE_INT, "globalmaxholes", 1966 SYSCTL_DESCR("Global maximum number of TCP SACK holes"), 1967 NULL, 0, &tcp_sack_globalmaxholes, 0, 1968 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 1969 sysctl_createv(clog, 0, NULL, &sack_node, 1970 CTLFLAG_PERMANENT, 1971 CTLTYPE_INT, "globalholes", 1972 SYSCTL_DESCR("Global number of TCP SACK holes"), 1973 NULL, 0, &tcp_sack_globalholes, 0, 1974 CTL_NET, pf, IPPROTO_TCP, TCPCTL_SACK, CTL_CREATE, CTL_EOL); 1975 1976 sysctl_createv(clog, 0, NULL, NULL, 1977 CTLFLAG_PERMANENT, 1978 CTLTYPE_STRUCT, "stats", 1979 SYSCTL_DESCR("TCP statistics"), 1980 sysctl_net_inet_tcp_stats, 0, NULL, 0, 1981 CTL_NET, pf, IPPROTO_TCP, TCPCTL_STATS, 1982 CTL_EOL); 1983 #ifdef TCP_DEBUG 1984 sysctl_createv(clog, 0, NULL, NULL, 1985 CTLFLAG_PERMANENT, 1986 CTLTYPE_STRUCT, "debug", 1987 SYSCTL_DESCR("TCP sockets debug information"), 1988 NULL, 0, &tcp_debug, sizeof(tcp_debug), 1989 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DEBUG, 1990 CTL_EOL); 1991 sysctl_createv(clog, 0, NULL, NULL, 1992 CTLFLAG_PERMANENT, 1993 CTLTYPE_INT, "debx", 1994 SYSCTL_DESCR("Number of TCP debug sockets messages"), 1995 NULL, 0, &tcp_debx, sizeof(tcp_debx), 1996 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DEBX, 1997 CTL_EOL); 1998 #endif 1999 sysctl_createv(clog, 0, NULL, NULL, 2000 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2001 CTLTYPE_STRUCT, "drop", 2002 SYSCTL_DESCR("TCP drop connection"), 2003 sysctl_net_inet_tcp_drop, 0, NULL, 0, 2004 CTL_NET, pf, IPPROTO_TCP, TCPCTL_DROP, CTL_EOL); 2005 #if NRND > 0 2006 sysctl_createv(clog, 0, NULL, NULL, 2007 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2008 CTLTYPE_INT, "iss_hash", 2009 SYSCTL_DESCR("Enable RFC 1948 ISS by cryptographic " 2010 "hash computation"), 2011 NULL, 0, &tcp_do_rfc1948, sizeof(tcp_do_rfc1948), 2012 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, 2013 CTL_EOL); 2014 #endif 2015 2016 /* ABC subtree */ 2017 2018 sysctl_createv(clog, 0, NULL, &abc_node, 2019 CTLFLAG_PERMANENT, CTLTYPE_NODE, "abc", 2020 SYSCTL_DESCR("RFC3465 Appropriate Byte Counting (ABC)"), 2021 NULL, 0, NULL, 0, 2022 CTL_NET, pf, IPPROTO_TCP, CTL_CREATE, CTL_EOL); 2023 sysctl_createv(clog, 0, &abc_node, NULL, 2024 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2025 CTLTYPE_INT, "enable", 2026 SYSCTL_DESCR("Enable RFC3465 Appropriate Byte Counting"), 2027 NULL, 0, &tcp_do_abc, 0, CTL_CREATE, CTL_EOL); 2028 sysctl_createv(clog, 0, &abc_node, NULL, 2029 CTLFLAG_PERMANENT|CTLFLAG_READWRITE, 2030 CTLTYPE_INT, "aggressive", 2031 SYSCTL_DESCR("1: L=2*SMSS 0: L=1*SMSS"), 2032 NULL, 0, &tcp_abc_aggressive, 0, CTL_CREATE, CTL_EOL); 2033 } 2034 2035 /* 2036 * Sysctl for tcp variables. 2037 */ 2038 #ifdef INET 2039 SYSCTL_SETUP(sysctl_net_inet_tcp_setup, "sysctl net.inet.tcp subtree setup") 2040 { 2041 2042 sysctl_net_inet_tcp_setup2(clog, PF_INET, "inet", "tcp"); 2043 } 2044 #endif /* INET */ 2045 2046 #ifdef INET6 2047 SYSCTL_SETUP(sysctl_net_inet6_tcp6_setup, "sysctl net.inet6.tcp6 subtree setup") 2048 { 2049 2050 sysctl_net_inet_tcp_setup2(clog, PF_INET6, "inet6", "tcp6"); 2051 } 2052 #endif /* INET6 */ 2053
Indexes created Sun Sep 21 18:09:52 GMT 2025